1----------------------------------------
227 May 2016. Summary of changes for version 20160527:
3
4This release is available at https://acpica.org/downloads
5
6
71) ACPICA kernel-resident subsystem:
8
9Temporarily reverted the new arbitrary bit length/alignment support in
10AcpiHwRead/AcpiHwWrite for the Generic Address Structure. There have been
11a number of regressions with the new code that need to be fully resolved
12and tested before this support can be finally integrated into ACPICA.
13Apologies for any inconveniences these issues may have caused.
14
15The ACPI message macros are not configurable (ACPI_MSG_ERROR,
16ACPI_MSG_EXCEPTION, ACPI_MSG_WARNING, ACPI_MSG_INFO, ACPI_MSG_BIOS_ERROR,
17and ACPI_MSG_BIOS_WARNING). Lv Zheng.
18
19Fixed a couple of GCC warnings associated with the use of the -Wcast-qual
20option. Adds a new return macro, return_STR. Junk-uk Kim.
21
22Example Code and Data Size: These are the sizes for the OS-independent
23acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
24debug version of the code includes the debug output trace mechanism and
25has a much larger code and data size.
26
27  Current Release:
28    Non-Debug Version: 136.8K Code, 51.6K Data, 188.4K Total
29    Debug Version:     201.5K Code, 82.2K Data, 283.7K Total
30  Previous Release:
31    Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
32    Debug Version:     200.9K Code, 82.2K Data, 283.1K Total
33
34----------------------------------------
3522 April 2016. Summary of changes for version 20160422:
36
371) ACPICA kernel-resident subsystem:
38
39Fixed a regression in the GAS (generic address structure) arbitrary bit
40support in AcpiHwRead/AcpiHwWrite. Problem could cause incorrect behavior
41and incorrect return values. Lv Zheng. ACPICA BZ 1270.
42
43ACPI 6.0: Added support for new/renamed resource macros. One new argument
44was added to each of these macros, and the original name has been
45deprecated. The AML disassembler will always disassemble to the new
46names. Support for the new macros was added to iASL, disassembler,
47resource manager, and the acpihelp utility. ACPICA BZ 1274.
48
49    I2cSerialBus  -> I2cSerialBusV2
50    SpiSerialBus  -> SpiSerialBusV2
51    UartSerialBus -> UartSerialBusV2
52
53ACPI 6.0: Added support for a new integer field that was appended to the
54package object returned by the _BIX method. This adds iASL compile-time
55and AML runtime error checking. ACPICA BZ 1273.
56
57ACPI 6.1: Added support for a new PCCT subtable, "HW-Reduced Comm
58Subspace Type2" (Headers, Disassembler, and data table compiler).
59
60Example Code and Data Size: These are the sizes for the OS-independent
61acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
62debug version of the code includes the debug output trace mechanism and
63has a much larger code and data size.
64
65  Current Release:
66    Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
67    Debug Version:     201.5K Code, 82.2K Data, 283.7K Total
68  Previous Release:
69    Non-Debug Version: 137.1K Code, 51.5K Data, 188.6K Total
70    Debug Version:     201.0K Code, 82.0K Data, 283.0K Total
71
72
732) iASL Compiler/Disassembler and Tools:
74
75iASL: Implemented an ASL grammar extension to allow/enable executable
76"module-level code" to be created and executed under the various
77operators that create new scopes. This type of AML code is already
78supported in all known AML interpreters, and the grammar change will
79appear in the next version of the ACPI specification. Simplifies the
80conditional runtime creation of named objects under these object types:
81
82    Device
83    PowerResource
84    Processor
85    Scope
86    ThermalZone
87
88iASL: Implemented a new ASL extension, a "For" loop macro to add greater
89ease-of-use to the ASL language. The syntax is similar to the
90corresponding C operator, and is implemented with the existing AML While
91opcode -- thus requiring no changes to existing AML interpreters.
92
93    For (Initialize, Predicate, Update) {TermList}
94
95Grammar:
96    ForTerm :=
97        For (
98            Initializer    // Nothing | TermArg => ComputationalData
99            Predicate      // Nothing | TermArg => ComputationalData
100            Update         // Nothing | TermArg => ComputationalData
101        ) {TermList}
102
103
104iASL: The _HID/_ADR detection and validation has been enhanced to search
105under conditionals in order to allow these objects to be conditionally
106created at runtime.
107
108iASL: Fixed several issues with the constant folding feature. The
109improvement allows better detection and resolution of statements that can
110be folded at compile time. ACPICA BZ 1266.
111
112iASL/Disassembler: Fixed a couple issues with the Else{If{}...}
113conversion to the ASL ElseIf operator where incorrect ASL code could be
114generated.
115
116iASL/Disassembler: Fixed a problem with the ASL+ code disassembly where
117sometimes an extra (and extraneous) set of parentheses were emitted for
118some combinations of operators. Although this did not cause any problems
119with recompilation of the disassembled code, it made the code more
120difficult to read. David Box. ACPICA BZ 1231.
121
122iASL: Changed to ignore the unreferenced detection for predefined names
123of resource descriptor elements, when the resource descriptor is
124created/defined within a control method.
125
126iASL: Disassembler: Fix a possible fault with externally declared Buffer
127objects.
128
129----------------------------------------
13018 March 2016. Summary of changes for version 20160318:
131
1321) ACPICA kernel-resident subsystem:
133
134Added support for arbitrary bit lengths and bit offsets for registers
135defined by the Generic Address Structure. Previously, only aligned bit
136lengths of 8/16/32/64 were supported. This was sufficient for many years,
137but recently some machines have been seen that require arbitrary bit-
138level support. ACPICA BZ 1240. Lv Zheng.
139
140Fixed an issue where the \_SB._INI method sometimes must be evaluated
141before any _REG methods are evaluated. Lv Zheng.
142
143Implemented several changes related to ACPI table support
144(Headers/Disassembler/TableCompiler):
145NFIT: For ACPI 6.1, updated to add some additional new fields and
146constants.
147FADT: Updated a warning message and set compliance to ACPI 6.1 (Version
1486).
149DMAR: Added new constants per the 10/2014 DMAR spec.
150IORT: Added new subtable per the 10/2015 IORT spec.
151HEST: For ACPI 6.1, added new constants and new subtable.
152DBG2: Added new constants per the 12/2015 DBG2 spec.
153FPDT: Fixed several incorrect fields, add the FPDT boot record structure.
154ACPICA BZ 1249.
155ERST/EINJ: Updated disassembler with new "Execute Timings" actions.
156
157Updated header support for the DMAR table to match the current version of
158the related spec.
159
160Added extensions to the ASL Concatenate operator to allow any ACPI object
161to be passed as an operand. Any object other than Integer/String/Buffer
162simply returns a string containing the object type. This extends the
163usefulness of the Printf macros. Previously, Concatenate would abort the
164control method if a non-data object was encountered.
165
166ACPICA source code: Deployed the C "const" keyword across the source code
167where appropriate. ACPICA BZ 732. Joerg Sonnenberger (NetBSD).
168
169Example Code and Data Size: These are the sizes for the OS-independent
170acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
171debug version of the code includes the debug output trace mechanism and
172has a much larger code and data size.
173
174  Current Release:
175    Non-Debug Version: 137.1K Code, 51.5K Data, 188.6K Total
176    Debug Version:     201.0K Code, 82.0K Data, 283.0K Total
177  Previous Release:
178    Non-Debug Version: 136.2K Code, 51.5K Data, 187.7K Total
179    Debug Version:     200.4K Code, 82.0K Data, 282.4K Total
180
181
1822) iASL Compiler/Disassembler and Tools:
183
184iASL/Disassembler: Improved the heuristic used to determine the number of
185arguments for an externally defined control method (a method in another
186table). Although this is an improvement, there is no deterministic way to
187"guess" the number of method arguments. Only the ACPI 6.0 External opcode
188will completely solve this problem as it is deployed (automatically) in
189newer BIOS code.
190
191iASL/Disassembler: Fixed an ordering issue for emitted External() ASL
192statements that could cause errors when the disassembled file is
193compiled. ACPICA BZ 1243. David Box.
194
195iASL: Fixed a regression caused by the merger of the two versions of the
196local strtoul64. Because of a dependency on a global variable, strtoul64
197could return an error for integers greater than a 32-bit value. ACPICA BZ
1981260.
199
200iASL: Fixed a regression where a fault could occur for an ASL Return
201statement if it invokes a control method that is not resolved. ACPICA BZ
2021264.
203
204AcpiXtract: Improved input file validation: detection of binary files and
205non-acpidump text files.
206
207----------------------------------------
20812 February 2016. Summary of changes for version 20160212:
209
2101) ACPICA kernel-resident subsystem:
211
212Implemented full support for the ACPI 6.1 specification (released in
213January). This version of the specification is available at:
214http://www.uefi.org/specifications
215
216Only a relatively small number of changes were required in ACPICA to
217support ACPI 6.1, in these areas:
218- New predefined names
219- New _HID values
220- A new subtable for HEST
221- A few other header changes for new values
222
223Ensure \_SB_._INI is executed before any _REG methods are executed. There
224appears to be existing BIOS code that relies on this behavior. Lv Zheng.
225
226Reverted a change made in version 20151218 which enabled method
227invocations to be targets of various ASL operators (SuperName and Target
228grammar elements). While the new behavior is supported by the ACPI
229specification, other AML interpreters do not support this behavior and
230never will. The ACPI specification will be updated for ACPI 6.2 to remove
231this support. Therefore, the change was reverted to the original ACPICA
232behavior.
233
234ACPICA now supports the GCC 6 compiler.
235
236Current Release: (Note: build changes increased sizes)
237    Non-Debug Version: 136.2K Code, 51.5K Data, 187.7K Total
238    Debug Version:     200.4K Code, 82.0K Data, 282.4K Total
239Previous Release:
240    Non-Debug Version: 102.7K Code, 28.4K Data, 131.1K Total
241    Debug Version:     200.4K Code, 81.9K Data, 282.3K Total
242
243
2442) iASL Compiler/Disassembler and Tools:
245
246Completed full support for the ACPI 6.0 External() AML opcode. The
247compiler emits an external AML opcode for each ASL External statement.
248This opcode is used by the disassembler to assist with the disassembly of
249external control methods by specifying the required number of arguments
250for the method. AML interpreters do not use this opcode. To ensure that
251interpreters do not even see the opcode, a block of one or more external
252opcodes is surrounded by an "If(0)" construct. As this feature becomes
253commonly deployed in BIOS code, the ability of disassemblers to correctly
254disassemble AML code will be greatly improved. David Box.
255
256iASL: Implemented support for an optional cross-reference output file.
257The -lx option will create a the cross-reference file with the suffix
258"xrf". Three different types of cross-reference are created in this file:
259- List of object references made from within each control method
260- Invocation (caller) list for each user-defined control method
261- List of references to each non-method object in the namespace
262
263iASL: Method invocations as ASL Target operands are now disallowed and
264flagged as errors in preparation for ACPI 6.2 (see the description of the
265problem above).
266
267----------------------------------------
2688 January 2016. Summary of changes for version 20160108:
269
2701) ACPICA kernel-resident subsystem:
271
272Updated all ACPICA copyrights and signons to 2016: Added the 2016
273copyright to all source code module headers and utility/tool signons.
274This includes the standard Linux dual-license header. This affects
275virtually every file in the ACPICA core subsystem, iASL compiler, all
276ACPICA utilities, and the ACPICA test suite.
277
278Fixed a regression introduced in version 20151218 concerning the
279execution of so-called module-level ASL/AML code. Namespace objects
280created under a module-level If() construct were not properly/fully
281entered into the namespace and could cause an interpreter fault when
282accessed.
283
284Example Code and Data Size: These are the sizes for the OS-independent
285acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
286debug version of the code includes the debug output trace mechanism and
287has a much larger code and data size.
288
289Current Release:
290    Non-Debug Version: 102.7K Code, 28.4K Data, 131.1K Total
291    Debug Version:     200.4K Code, 81.9K Data, 282.4K Total
292  Previous Release:
293    Non-Debug Version: 102.6K Code, 28.4K Data, 131.0K Total
294    Debug Version:     200.3K Code, 81.9K Data, 282.3K Total
295
296
2972) iASL Compiler/Disassembler and Tools:
298
299Fixed a problem with the compilation of the GpioIo and GpioInt resource
300descriptors. The _PIN field name was incorrectly defined to be an array
301of 32-bit values, but the _PIN values are in fact 16 bits each. This
302would cause incorrect bit width warnings when using Word (16-bit) fields
303to access the descriptors.
304
305
306----------------------------------------
30718 December 2015. Summary of changes for version 20151218:
308
3091) ACPICA kernel-resident subsystem:
310
311Implemented per-AML-table execution of "module-level code" as individual
312ACPI tables are loaded into the namespace during ACPICA initialization.
313In other words, any module-level code within an AML table is executed
314immediately after the table is loaded, instead of batched and executed
315after all of the tables have been loaded. This provides compatibility
316with other ACPI implementations. ACPICA BZ 1219. Bob Moore, Lv Zheng,
317David Box.
318
319To fully support the feature above, the default operation region handlers
320for the SystemMemory, SystemIO, and PCI_Config address spaces are now
321installed before any ACPI tables are loaded. This enables module-level
322code to access these address spaces during the table load and module-
323level code execution phase. ACPICA BZ 1220. Bob Moore, Lv Zheng, David
324Box.
325
326Implemented several changes to the internal _REG support in conjunction
327with the changes above. Also, changes to the AcpiExec/AcpiNames/Examples
328utilities for the changes above. Although these tools were changed, host
329operating systems that simply use the default handlers for SystemMemory,
330SystemIO, and PCI_Config spaces should not require any update. Lv Zheng.
331
332For example, in the code below, DEV1 is conditionally added to the
333namespace by the DSDT via module-level code that accesses an operation
334region. The SSDT references DEV1 via the Scope operator. DEV1 must be
335created immediately after the DSDT is loaded in order for the SSDT to
336successfully reference DEV1. Previously, this code would cause an
337AE_NOT_EXIST exception during the load of the SSDT. Now, this code is
338fully supported by ACPICA.
339
340    DefinitionBlock ("", "DSDT", 2, "Intel", "DSDT1", 1)
341    {
342        OperationRegion (OPR1, SystemMemory, 0x400, 32)
343        Field (OPR1, AnyAcc, NoLock, Preserve)
344        {
345            FLD1, 1
346        }
347        If (FLD1)
348        {
349            Device (\DEV1)
350            {
351            }
352        }
353    }
354    DefinitionBlock ("", "SSDT", 2, "Intel", "SSDT1", 1)
355    {
356        External (\DEV1, DeviceObj)
357        Scope (\DEV1)
358        {
359        }
360    }
361
362Fixed an AML interpreter problem where control method invocations were
363not handled correctly when the invocation was itself a SuperName argument
364to another ASL operator. In these cases, the method was not invoked.
365ACPICA BZ 1002. Affects the following ASL operators that have a SuperName
366argument:
367    Store
368    Acquire, Wait
369    CondRefOf, RefOf
370    Decrement, Increment
371    Load, Unload
372    Notify
373    Signal, Release, Reset
374    SizeOf
375
376Implemented automatic String-to-ObjectReference conversion support for
377packages returned by predefined names (such as _DEP). A common BIOS error
378is to add double quotes around an ObjectReference namepath, which turns
379the reference into an unexpected string object. This support detects the
380problem and corrects it before the package is returned to the caller that
381invoked the method. Lv Zheng.
382
383Implemented extensions to the Concatenate operator. Concatenate now
384accepts any type of object, it is not restricted to simply
385Integer/String/Buffer. For objects other than these 3 basic data types,
386the argument is treated as a string containing the name of the object
387type. This expands the utility of Concatenate and the Printf/Fprintf
388macros. ACPICA BZ 1222.
389
390Cleaned up the output of the ASL Debug object. The timer() value is now
391optional and no longer emitted by default. Also, the basic data types of
392Integer/String/Buffer are simply emitted as their values, without a data
393type string -- since the data type is obvious from the output. ACPICA BZ
3941221.
395
396Example Code and Data Size: These are the sizes for the OS-independent
397acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
398debug version of the code includes the debug output trace mechanism and
399has a much larger code and data size.
400
401  Current Release:
402    Non-Debug Version: 102.6K Code, 28.4K Data, 131.0K Total
403    Debug Version:     200.3K Code, 81.9K Data, 282.3K Total
404  Previous Release:
405    Non-Debug Version: 102.0K Code, 28.3K Data, 130.3K Total
406    Debug Version:     199.6K Code, 81.8K Data, 281.4K Total
407
408
4092) iASL Compiler/Disassembler and Tools:
410
411iASL: Fixed some issues with the ASL Include() operator. This operator
412was incorrectly defined in the iASL parser rules, causing a new scope to
413be opened for the code within the include file. This could lead to
414several issues, including allowing ASL code that is technically illegal
415and not supported by AML interpreters. Note, this does not affect the
416related #include preprocessor operator. ACPICA BZ 1212.
417
418iASL/Disassembler: Implemented support for the ASL ElseIf operator. This
419operator is essentially an ASL macro since there is no AML opcode
420associated with it. The code emitted by the iASL compiler for ElseIf is
421an Else opcode followed immediately by an If opcode. The disassembler
422will now emit an ElseIf if it finds an Else immediately followed by an
423If. This simplifies the decoded ASL, especially for deeply nested
424If..Else and large Switch constructs. Thus, the disassembled code more
425closely follows the original source ASL. ACPICA BZ 1211. Example:
426
427    Old disassembly:
428        Else
429        {
430            If (Arg0 == 0x02)
431            {
432                Local0 = 0x05
433            }
434        }
435
436    New disassembly:
437        ElseIf (Arg0 == 0x02)
438        {
439            Local0 = 0x05
440        }
441
442AcpiExec: Added support for the new module level code behavior and the
443early region installation. This required a small change to the
444initialization, since AcpiExec must install its own operation region
445handlers.
446
447AcpiExec: Added support to make the debug object timer optional. Default
448is timer disabled. This cleans up the debug object output -- the timer
449data is rarely used.
450
451AcpiExec: Multiple ACPI tables are now loaded in the order that they
452appear on the command line. This can be important when there are
453interdependencies/references between the tables.
454
455iASL/Templates. Add support to generate template files with multiple
456SSDTs within a single output file. Also added ommand line support to
457specify the number of SSDTs (in addition to a single DSDT). ACPICA BZ
4581223, 1225.
459
460
461----------------------------------------
46224 November 2015. Summary of changes for version 20151124:
463
4641) ACPICA kernel-resident subsystem:
465
466Fixed a possible regression for a previous update to FADT handling. The
467FADT no longer has a fixed table ID, causing some issues with code that
468was hardwired to a specific ID. Lv Zheng.
469
470Fixed a problem where the method auto-serialization could interfere with
471the current SyncLevel. This change makes the auto-serialization support
472transparent to the SyncLevel support and management.
473
474Removed support for the _SUB predefined name in AcpiGetObjectInfo. This
475interface is intended for early access to the namespace during the
476initial namespace device discovery walk. The _SUB method has been seen to
477access operation regions in some cases, causing errors because the
478operation regions are not fully initialized.
479
480AML Debugger: Fixed some issues with the terminate/quit/exit commands
481that can cause faults. Lv Zheng.
482
483AML Debugger: Add thread ID support so that single-step mode only applies
484to the AML Debugger thread. This prevents runtime errors within some
485kernels. Lv Zheng.
486
487Eliminated extraneous warnings from AcpiGetSleepTypeData. Since the _Sx
488methods that are invoked by this interface are optional, removed warnings
489emitted for the case where one or more of these methods do not exist.
490ACPICA BZ 1208, original change by Prarit Bhargava.
491
492Made a major pass through the entire ACPICA source code base to
493standardize formatting that has diverged a bit over time. There are no
494functional changes, but this will of course cause quite a few code
495differences from the previous ACPICA release.
496
497Example Code and Data Size: These are the sizes for the OS-independent
498acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
499debug version of the code includes the debug output trace mechanism and
500has a much larger code and data size.
501
502  Current Release:
503    Non-Debug Version: 102.0K Code, 28.3K Data, 130.3K Total
504    Debug Version:     199.6K Code, 81.8K Data, 281.4K Total
505  Previous Release:
506    Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
507    Debug Version:     199.3K Code, 81.4K Data, 280.7K Total
508
509
5102) iASL Compiler/Disassembler and Tools:
511
512iASL/acpiexec/acpixtract/disassembler: Added support to allow multiple
513definition blocks within a single ASL file and the resulting AML file.
514Support for this type of file was also added to the various tools that
515use binary AML files: acpiexec, acpixtract, and the AML disassembler. The
516example code below shows two definition blocks within the same file:
517
518    DefinitionBlock ("dsdt.aml", "DSDT", 2, "Intel", "Template",
5190x12345678)
520    {
521    }
522    DefinitionBlock ("", "SSDT", 2, "Intel", "Template", 0xABCDEF01)
523    {
524    }
525
526iASL: Enhanced typechecking for the Name() operator. All expressions for
527the value of the named object must be reduced/folded to a single constant
528at compile time, as per the ACPI specification (the AML definition of
529Name()).
530
531iASL: Fixed some code indentation issues for the -ic and -ia options (C
532and assembly headers). Now all emitted code correctly begins in column 1.
533
534iASL: Added an error message for an attempt to open a Scope() on an
535object defined in an SSDT. The DSDT is always loaded into the namespace
536first, so any attempt to open a Scope on an SSDT object will fail at
537runtime.
538
539
540----------------------------------------
54130 September 2015. Summary of changes for version 20150930:
542
5431) ACPICA kernel-resident subsystem:
544
545Debugger: Implemented several changes and bug fixes to assist support for
546the in-kernel version of the AML debugger. Lv Zheng.
547- Fix the "predefined" command for in-kernel debugger.
548- Do not enter debug command loop for the help and version commands.
549- Disallow "execute" command during execution/single-step of a method.
550
551Interpreter: Updated runtime typechecking for all operators that have
552target operands. The operand is resolved and validated that it is legal.
553For example, the target cannot be a non-data object such as a Device,
554Mutex, ThermalZone, etc., as per the ACPI specification.
555
556Debugger: Fixed the double-mutex user I/O handshake to work when local
557deadlock detection is enabled.
558
559Debugger: limited display of method locals and arguments (LocalX and
560ArgX) to only those that have actually been initialized. This prevents
561lines of extraneous output.
562
563Updated the definition of the NFIT table to correct the bit polarity of
564one flag: ACPI_NFIT_MEM_ARMED --> ACPI_NFIT_MEM_NOT_ARMED
565
566Example Code and Data Size: These are the sizes for the OS-independent
567acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
568debug version of the code includes the debug output trace mechanism and
569has a much larger code and data size.
570
571  Current Release:
572    Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
573    Debug Version:     199.3K Code, 81.4K Data, 280.7K Total
574  Previous Release:
575    Non-Debug Version: 101.3K Code, 27.7K Data, 129.0K Total
576    Debug Version:     198.6K Code, 80.9K Data, 279.5K Total
577
578
5792) iASL Compiler/Disassembler and Tools:
580
581iASL: Improved the compile-time typechecking for operands of many of the
582ASL operators:
583
584-- Added an option to disable compiler operand/operator typechecking (-
585ot).
586
587-- For the following operators, the TermArg operands are now validated
588when possible to be Integer data objects: BankField, OperationRegion,
589DataTableRegion, Buffer, and Package.
590
591-- Store (Source, Target): Both the source and target operands are
592resolved and checked that the operands are both legal. For example,
593neither operand can be a non-data object such as a Device, Mutex,
594ThermalZone, etc. Note, as per the ACPI specification, the CopyObject
595operator can be used to store an object to any type of target object.
596
597-- Store (Source, Target): If the source is a Package object, the target
598must be a Package object, LocalX, ArgX, or Debug. Likewise, if the target
599is a Package, the source must also be a Package.
600
601-- Store (Source, Target): A warning is issued if the source and target
602resolve to the identical named object.
603
604-- Store (Source, <method invocation>): An error is generated for the
605target method invocation, as this construct is not supported by the AML
606interpreter.
607
608-- For all ASL math and logic operators, the target operand must be a
609data object (Integer, String, Buffer, LocalX, ArgX, or Debug). This
610includes the function return value also.
611
612-- External declarations are also included in the typechecking where
613possible. External objects defined using the UnknownObj keyword cannot be
614typechecked, however.
615
616iASL and Disassembler: Added symbolic (ASL+) support for the ASL Index
617operator:
618- Legacy code: Index(PKG1, 3)
619- New ASL+ code: PKG1[3]
620This completes the ACPI 6.0 ASL+ support as it was the only operator not
621supported.
622
623iASL: Fixed the file suffix for the preprocessor output file (.i). Two
624spaces were inadvertently appended to the filename, causing file access
625and deletion problems on some systems.
626
627ASL Test Suite (ASLTS): Updated the master makefile to generate all
628possible compiler output files when building the test suite -- thus
629exercising these features of the compiler. These files are automatically
630deleted when the test suite exits.
631
632
633----------------------------------------
63418 August 2015. Summary of changes for version 20150818:
635
6361) ACPICA kernel-resident subsystem:
637
638Fix a regression for AcpiGetTableByIndex interface causing it to fail. Lv
639Zheng. ACPICA BZ 1186.
640
641Completed development to ensure that the ACPICA Disassembler and Debugger
642are fully standalone components of ACPICA. Removed cross-component
643dependences. Lv Zheng.
644
645The max-number-of-AML-loops is now runtime configurable (previously was
646compile-time only). This is essentially a loop timeout to force-abort
647infinite AML loops. ACPCIA BZ 1192.
648
649Debugger: Cleanup output to dump ACPI names and namepaths without any
650trailing underscores. Lv Zheng. ACPICA BZ 1135.
651
652Removed unnecessary conditional compilations across the Debugger and
653Disassembler components where entire modules could be left uncompiled.
654
655The aapits test is deprecated and has been removed from the ACPICA git
656tree. The test has never been completed and has not been maintained, thus
657becoming rather useless. ACPICA BZ 1015, 794.
658
659A batch of small changes to close bugzilla and other reports:
660- Remove duplicate code for _PLD processing. ACPICA BZ 1176.
661- Correctly cleanup after a ACPI table load failure. ACPICA BZ 1185.
662- iASL: Support POSIX yacc again in makefile. Jung-uk Kim.
663- ACPI table support: general cleanup and simplification. Lv Zheng, Bob
664Moore.
665- ACPI table support: fix for a buffer read overrun in AcpiTbFindTable.
666ACPICA BZ 1184.
667- Enhance parameter validation for DataTableRegion and LoadTable ASL/AML
668operators.
669- Debugger: Split debugger initialization/termination interfaces. Lv
670Zheng.
671- AcpiExec: Emit OemTableId for SSDTs during the load phase for table
672identification.
673- AcpiExec: Add debug message during _REG method phase during table
674load/init.
675- AcpiNames: Fix a regression where some output was missing and no longer
676emitted.
677- Debugger: General cleanup and simplification. Lv Zheng.
678- Disassembler: Cleanup use of several global option variables. Lv Zheng.
679
680Example Code and Data Size: These are the sizes for the OS-independent
681acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
682debug version of the code includes the debug output trace mechanism and
683has a much larger code and data size.
684
685  Current Release:
686    Non-Debug Version: 101.3K Code, 27.7K Data, 129.0K Total
687    Debug Version:     198.6K Code, 80.9K Data, 279.5K Total
688  Previous Release:
689    Non-Debug Version: 100.9K Code, 24.5K Data, 125.4K Total
690    Debug Version:     197.8K Code, 81.5K Data, 279.3K Total
691
692
6932) iASL Compiler/Disassembler and Tools:
694
695AcpiExec: Fixed a problem where any more than 32 ACPI tables in the XSDT
696were not handled properly and caused load errors. Now, properly invoke
697and use the ACPICA auto-reallocate mechanism for ACPI table data
698structures. ACPICA BZ 1188
699
700AcpiNames: Add command-line wildcard support for ACPI table files. ACPICA
701BZ 1190.
702
703AcpiExec and AcpiNames: Add -l option to load ACPI tables only. For
704AcpiExec, this means that no control methods (like _REG/_INI/_STA) are
705executed during initialization. ACPICA BZ 1187, 1189.
706
707iASL/Disassembler: Implemented a prototype "listing" mode that emits AML
708that corresponds to each disassembled ASL statement, to simplify
709debugging. ACPICA BZ 1191.
710
711Debugger: Add option to the "objects" command to display a summary of the
712current namespace objects (Object type and count). This is displayed if
713the command is entered with no arguments.
714
715AcpiNames: Add -x option to specify debug level, similar to AcpiExec.
716
717
718----------------------------------------
71917 July 2015. Summary of changes for version 20150717:
720
7211) ACPICA kernel-resident subsystem:
722
723Improved the partitioning between the Debugger and Disassembler
724components. This allows the Debugger to be used standalone within kernel
725code without the Disassembler (which is used for single stepping also).
726This renames and moves one file, dmobject.c to dbobject.c. Lv Zheng.
727
728Debugger: Implemented a new command to trace the execution of control
729methods (Trace). This is especially useful for the in-kernel version of
730the debugger when file I/O may not be available for method trace output.
731See the ACPICA reference for more information. Lv Zheng.
732
733Moved all C library prototypes (used for the local versions of these
734functions when requested) to a new header, acclib.h
735Cleaned up the use of non-ANSI C library functions. These functions are
736implemented locally in ACPICA. Moved all such functions to a common
737source file, utnonansi.c
738
739Debugger: Fixed a problem with the "!!" command (get last command
740executed) where the debugger could enter an infinite loop and eventually
741crash.
742
743Removed the use of local macros that were used for some of the standard C
744library functions to automatically cast input parameters. This mostly
745affected the is* functions where the input parameter is defined to be an
746int. This required a few modifications to the main ACPICA source code to
747provide casting for these functions and eliminate possible compiler
748warnings for these parameters.
749
750Across the source code, added additional status/error checking to resolve
751issues discovered by static source code analysis tools such as Coverity.
752
753Example Code and Data Size: These are the sizes for the OS-independent
754acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
755debug version of the code includes the debug output trace mechanism and
756has a much larger code and data size.
757
758  Current Release:
759    Non-Debug Version: 100.9K Code, 24.5K Data, 125.4K Total
760    Debug Version:     197.8K Code, 81.5K Data, 279.3K Total
761  Previous Release:
762    Non-Debug Version: 100.6K Code, 27.6K Data, 128.2K Total
763    Debug Version:     196.2K Code, 81.0K Data, 277.2K Total
764
765
7662) iASL Compiler/Disassembler and Tools:
767
768iASL: Fixed a regression where the device map file feature no longer
769worked properly when used in conjunction with the disassembler. It only
770worked properly with the compiler itself.
771
772iASL: Implemented a new warning for method LocalX variables that are set
773but never used (similar to a C compiler such as gcc). This also applies
774to ArgX variables that are not defined by the parent method, and are
775instead (legally) used as local variables.
776
777iASL/Preprocessor: Finished the pass-through of line numbers from the
778preprocessor to the compiler. This ensures that compiler errors/warnings
779have the correct original line numbers and filenames, regardless of any
780#include files.
781
782iASL/Preprocessor: Fixed a couple of issues with comment handling and the
783pass-through of comments to the preprocessor output file (which becomes
784the compiler input file). Also fixed a problem with // comments that
785appear after a math expression.
786
787iASL: Added support for the TCPA server table to the table compiler and
788template generator. (The client table was already previously supported)
789
790iASL/Preprocessor: Added a permanent #define of the symbol "__IASL__" to
791identify the iASL compiler.
792
793Cleaned up the use of the macros NEGATIVE and POSITIVE which were defined
794multiple times. The new names are ACPI_SIGN_NEGATIVE and
795ACPI_SIGN_POSITIVE.
796
797AcpiHelp: Update to expand help messages for the iASL preprocessor
798directives.
799
800
801----------------------------------------
80219 June 2015. Summary of changes for version 20150619:
803
804Two regressions in version 20150616 have been addressed:
805
806Fixes some problems/issues with the C library macro removal (ACPI_STRLEN,
807etc.) This update changes ACPICA to only use the standard headers for
808functions, or the prototypes for the local versions of the C library
809functions. Across the source code, this required some additional casts
810for some Clib invocations for portability. Moved all local prototypes to
811a new file, acclib.h
812
813Fixes several problems with recent changes to the handling of the FACS
814table that could cause some systems not to boot.
815
816
817----------------------------------------
81816 June 2015. Summary of changes for version 20150616:
819
820
8211) ACPICA kernel-resident subsystem:
822
823Across the entire ACPICA source code base, the various macros for the C
824library functions (such as ACPI_STRLEN, etc.) have been removed and
825replaced by the standard C library names (strlen, etc.) The original
826purpose for these macros is no longer applicable. This simplification
827reduces the number of macros used in the ACPICA source code
828significantly, improving readability and maintainability.
829
830Implemented support for a new ACPI table, the OSDT. This table, the
831"override" SDT, can be loaded directly by the host OS at boot time. It
832enables the replacement of existing namespace objects that were installed
833via the DSDT and/or SSDTs. The primary purpose for this is to replace
834buggy or incorrect ASL/AML code obtained via the BIOS. The OSDT is slated
835for inclusion in a future version of the ACPI Specification. Lv Zheng/Bob
836Moore.
837
838Added support for systems with (improperly) two FACS tables -- a "32-bit"
839table (via FADT 32-bit legacy field) and a "64-bit" table (via the 64-bit
840X field). This change will support both automatically. There continues to
841be systems found with this issue. This support requires a change to the
842AcpiSetFirmwareWakingVector interface. Also, a public global variable has
843been added to allow the host to select which FACS is desired
844(AcpiGbl_Use32BitFacsAddresses). See the ACPICA reference for more
845details Lv Zheng.
846
847Added a new feature to allow for systems that do not contain an FACS.
848Although this is already supported on hardware-reduced platforms, the
849feature has been extended for all platforms. The reasoning is that we do
850not want to abort the entire ACPICA initialization just because the
851system is seriously buggy and has no FACS.
852
853Fixed a problem where the GUID strings for NFIT tables (in acuuid.h) were
854not correctly transcribed from the ACPI specification in ACPICA version
85520150515.
856
857Implemented support for the _CLS object in the AcpiGetObjectInfo external
858interface.
859
860Updated the definitions of the TCPA and TPM2 ACPI tables to the more
861recent TCG ACPI Specification, December 14, 2014. Table disassembler and
862compiler also updated. Note: The TCPA "server" table is not supported by
863the disassembler/table-compiler at this time.
864
865ACPI 6.0: Added definitions for the new GIC version field in the MADT.
866
867Example Code and Data Size: These are the sizes for the OS-independent
868acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
869debug version of the code includes the debug output trace mechanism and
870has a much larger code and data size.
871
872  Current Release:
873    Non-Debug Version: 100.6K Code, 27.6K Data, 128.2K Total
874    Debug Version:     196.2K Code, 81.0K Data, 277.2K Total
875  Previous Release:
876    Non-Debug Version:  99.9K Code, 27.5K Data, 127.4K Total
877    Debug Version:     195.2K Code, 80.8K Data, 276.0K Total
878
879
8802) iASL Compiler/Disassembler and Tools:
881
882Disassembler: Fixed a problem with the new symbolic operator disassembler
883where incorrect ASL code could be emitted in some cases for the "non-
884commutative" operators -- Subtract, Divide, Modulo, ShiftLeft, and
885ShiftRight. The actual problem cases seem to be rather unusual in common
886ASL code, however. David Box.
887
888Modified the linux version of acpidump to obtain ACPI tables from not
889just /dev/mem (which may not exist) and /sys/firmware/acpi/tables. Lv
890Zheng.
891
892iASL: Fixed a problem where the user preprocessor output file (.i)
893contained extra data that was not expected. The compiler was using this
894file as a temporary file and passed through #line directives in order to
895keep compiler error messages in sync with the input file and line number
896across multiple include files. The (.i) is no longer a temporary file as
897the compiler uses a new, different file for the original purpose.
898
899iASL: Fixed a problem where comments within the original ASL source code
900file were not passed through to the preprocessor output file, nor any
901listing files.
902
903iASL: Fixed some issues for the handling of the "#include" preprocessor
904directive and the similar (but not the same) "Include" ASL operator.
905
906iASL: Add support for the new OSDT in both the disassembler and compiler.
907
908iASL: Fixed a problem with the constant folding support where a Buffer
909object could be incorrectly generated (incorrectly formed) during a
910conversion to a Store() operator.
911
912AcpiHelp: Updated for new NFIT GUIDs, "External" AML opcode, and new
913description text for the _REV predefined name. _REV now permanently
914returns 2, as per the ACPI 6.0 specification.
915
916Debugger: Enhanced the output of the Debug ASL object for references
917produced by the Index operator. For Buffers and strings, only output the
918actual byte pointed to by the index. For packages, only print the single
919package element decoded by the index. Previously, the entire
920buffer/string/package was emitted.
921
922iASL/Table-compiler: Fixed a regression where the "generic" data types
923were no longer recognized, causing errors.
924
925
926----------------------------------------
92715 May 2015. Summary of changes for version 20150515:
928
929This release implements most of ACPI 6.0 as described below.
930
9311) ACPICA kernel-resident subsystem:
932
933Implemented runtime argument checking and return value checking for all
934new ACPI 6.0 predefined names. This includes: _BTH, _CR3, _DSD, _LPI,
935_MTL, _PRR, _RDI, _RST, _TFP, _TSN.
936
937Example Code and Data Size: These are the sizes for the OS-independent
938acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
939debug version of the code includes the debug output trace mechanism and
940has a much larger code and data size.
941
942  Current Release:
943    Non-Debug Version:  99.9K Code, 27.5K Data, 127.4K Total
944    Debug Version:     195.2K Code, 80.8K Data, 276.0K Total
945  Previous Release:
946    Non-Debug Version:  99.1K Code, 27.3K Data, 126.4K Total
947    Debug Version:     192.8K Code, 79.9K Data, 272.7K Total
948
949
9502) iASL Compiler/Disassembler and Tools:
951
952iASL compiler: Added compile-time support for all new ACPI 6.0 predefined
953names (argument count validation and return value typechecking.)
954
955iASL disassembler and table compiler: implemented support for all new
956ACPI 6.0 tables. This includes: DRTM, IORT, LPIT, NFIT, STAO, WPBT, XENV.
957
958iASL disassembler and table compiler: Added ACPI 6.0 changes to existing
959tables: FADT, MADT.
960
961iASL preprocessor: Added a new directive to enable inclusion of binary
962blobs into ASL code. The new directive is #includebuffer. It takes a
963binary file as input and emits a named ascii buffer object into the ASL
964code.
965
966AcpiHelp: Added support for all new ACPI 6.0 predefined names.
967
968AcpiHelp: Added a new option, -d, to display all iASL preprocessor
969directives.
970
971AcpiHelp: Added a new option, -t, to display all known/supported ACPI
972tables.
973
974
975----------------------------------------
97610 April 2015. Summary of changes for version 20150410:
977
978Reverted a change introduced in version 20150408 that caused
979a regression in the disassembler where incorrect operator
980symbols could be emitted.
981
982
983----------------------------------------
98408 April 2015. Summary of changes for version 20150408:
985
986
9871) ACPICA kernel-resident subsystem:
988
989Permanently set the return value for the _REV predefined name. It now
990returns 2 (was 5). This matches other ACPI implementations. _REV will be
991deprecated in the future, and is now defined to be 1 for ACPI 1.0, and 2
992for ACPI 2.0 and later. It should never be used to differentiate or
993identify operating systems.
994
995Added the "Windows 2015" string to the _OSI support. ACPICA will now
996return TRUE to a query with this string.
997
998Fixed several issues with the local version of the printf function.
999
1000Added the C99 compiler option (-std=c99) to the Unix makefiles.
1001
1002  Current Release:
1003    Non-Debug Version:  99.9K Code, 27.4K Data, 127.3K Total
1004    Debug Version:     195.2K Code, 80.7K Data, 275.9K Total
1005  Previous Release:
1006    Non-Debug Version:  98.8K Code, 27.3K Data, 126.1K Total
1007    Debug Version:     192.1K Code, 79.8K Data, 271.9K Total
1008
1009
10102) iASL Compiler/Disassembler and Tools:
1011
1012iASL: Implemented an enhancement to the constant folding feature to
1013transform the parse tree to a simple Store operation whenever possible:
1014    Add (2, 3, X) ==> is converted to: Store (5, X)
1015    X = 2 + 3     ==> is converted to: Store (5, X)
1016
1017Updated support for the SLIC table (Software Licensing Description Table)
1018in both the Data Table compiler and the disassembler. The SLIC table
1019support now conforms to "Microsoft Software Licensing Tables (SLIC and
1020MSDM). November 29, 2011. Copyright 2011 Microsoft". Note: Any SLIC data
1021following the ACPI header is now defined to be "Proprietary Data", and as
1022such, can only be entered or displayed as a hex data block.
1023
1024Implemented full support for the MSDM table as described in the document
1025above. Note: The format of MSDM is similar to SLIC. Any MSDM data
1026following the ACPI header is defined to be "Proprietary Data", and can
1027only be entered or displayed as a hex data block.
1028
1029Implemented the -Pn option for the iASL Table Compiler (was only
1030implemented for the ASL compiler). This option disables the iASL
1031preprocessor.
1032
1033Disassembler: For disassembly of Data Tables, added a comment field
1034around the Ascii equivalent data that is emitted as part of the "Raw
1035Table Data" block. This prevents the iASL Preprocessor from possible
1036confusion if/when the table is compiled.
1037
1038Disassembler: Added an option (-df) to force the disassembler to assume
1039that the table being disassembled contains valid AML. This feature is
1040useful for disassembling AML files that contain ACPI signatures other
1041than DSDT or SSDT (such as OEMx or other signatures).
1042
1043Changes for the EFI version of the tools:
10441) Fixed a build error/issue
10452) Fixed a cast warning
1046
1047iASL: Fixed a path issue with the __FILE__ operator by making the
1048directory prefix optional within the internal SplitInputFilename
1049function.
1050
1051Debugger: Removed some unused global variables.
1052
1053Tests: Updated the makefile for proper generation of the AAPITS suite.
1054
1055
1056----------------------------------------
105704 February 2015. Summary of changes for version 20150204:
1058
1059ACPICA kernel-resident subsystem:
1060
1061Updated all ACPICA copyrights and signons to 2014. Added the 2014
1062copyright to all module headers and signons, including the standard Linux
1063header. This affects virtually every file in the ACPICA core subsystem,
1064iASL compiler, all ACPICA utilities, and the test suites.
1065
1066Events: Introduce ACPI_GPE_DISPATCH_RAW_HANDLER to fix GPE storm issues.
1067A raw gpe handling mechanism was created to allow better handling of GPE
1068storms that aren't easily managed by the normal handler. The raw handler
1069allows disabling/renabling of the the GPE so that interrupt storms can be
1070avoided in cases where events cannot be timely serviced. In this
1071scenario, handlers should use the AcpiSetGpe() API to disable/enable the
1072GPE. This API will leave the reference counts undisturbed, thereby
1073preventing unintentional clearing of the GPE when the intent in only to
1074temporarily disable it. Raw handlers allow enabling and disabling of a
1075GPE by removing GPE register locking. As such, raw handlers much provide
1076their own locks while using GPE API's to protect access to GPE data
1077structures.
1078Lv Zheng
1079
1080Events: Always modify GPE registers under the GPE lock.
1081Applies GPE lock around AcpiFinishGpe() to protect access to GPE register
1082values. Reported as bug by joe.liu@apple.com.
1083
1084Unix makefiles: Separate option to disable optimizations and
1085_FORTIFY_SOURCE. This change removes the _FORTIFY_SOURCE flag from the
1086NOOPT disable option and creates a separate flag (NOFORTIFY) for this
1087purpose. Some toolchains may define _FORTIFY_SOURCE which leads redefined
1088errors when building ACPICA. This allows disabling the option without
1089also having to disable optimazations.
1090David Box
1091
1092  Current Release:
1093    Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
1094    Debug Version:     199.2K Code, 82.4K Data, 281.6K Total
1095
1096--
1097--------------------------------------
109807 November 2014. Summary of changes for version 20141107:
1099
1100This release is available at https://acpica.org/downloads
1101
1102This release introduces and implements language extensions to ASL that
1103provide support for symbolic ("C-style") operators and expressions. These
1104language extensions are known collectively as ASL+.
1105
1106
11071) iASL Compiler/Disassembler and Tools:
1108
1109Disassembler: Fixed a problem with disassembly of the UartSerialBus
1110macro. Changed "StopBitsNone" to the correct "StopBitsZero". David E.
1111Box.
1112
1113Disassembler: Fixed the Unicode macro support to add escape sequences.
1114All non-printable ASCII values are emitted as escape sequences, as well
1115as the standard escapes for quote and backslash. Ensures that the
1116disassembled macro can be correctly recompiled.
1117
1118iASL: Added Printf/Fprintf macros for formatted output. These macros are
1119translated to existing AML Concatenate and Store operations. Printf
1120writes to the ASL Debug object. Fprintf allows the specification of an
1121ASL name as the target. Only a single format specifier is required, %o,
1122since the AML interpreter dynamically converts objects to the required
1123type. David E. Box.
1124
1125    (old)    Store (Concatenate (Concatenate (Concatenate (Concatenate
1126                 (Concatenate (Concatenate (Concatenate ("", Arg0),
1127                 ": Unexpected value for "), Arg1), ", "), Arg2),
1128                 " at line "), Arg3), Debug)
1129
1130    (new)    Printf ("%o: Unexpected value for %o, %o at line %o",
1131                 Arg0, Arg1, Arg2, Arg3)
1132
1133    (old)    Store (Concatenate (Concatenate (Concatenate (Concatenate
1134                 ("", Arg1), ": "), Arg0), " Successful"), STR1)
1135
1136    (new)    Fprintf (STR1, "%o: %o Successful", Arg1, Arg0)
1137
1138iASL: Added debug options (-bp, -bt) to dynamically prune levels of the
1139ASL parse tree before the AML code is generated. This allows blocks of
1140ASL code to be removed in order to help locate and identify problem
1141devices and/or code. David E. Box.
1142
1143AcpiExec: Added support (-fi) for an optional namespace object
1144initialization file. This file specifies initial values for namespace
1145objects as necessary for debugging and testing different ASL code paths
1146that may be taken as a result of BIOS options.
1147
1148
11492) Overview of symbolic operator support for ASL (ASL+)
1150-------------------------------------------------------
1151
1152As an extension to the ASL language, iASL implements support for symbolic
1153(C-style) operators for math and logical expressions. This can greatly
1154simplify ASL code as well as improve both readability and
1155maintainability. These language extensions can exist concurrently with
1156all legacy ASL code and expressions.
1157
1158The symbolic extensions are 100% compatible with existing AML
1159interpreters, since no new AML opcodes are created. To implement the
1160extensions, the iASL compiler transforms the symbolic expressions into
1161the legacy ASL/AML equivalents at compile time.
1162
1163Full symbolic expressions are supported, along with the standard C
1164precedence and associativity rules.
1165
1166Full disassembler support for the symbolic expressions is provided, and
1167creates an automatic migration path for existing ASL code to ASL+ code
1168via the disassembly process. By default, the disassembler now emits ASL+
1169code with symbolic expressions. An option (-dl) is provided to force the
1170disassembler to emit legacy ASL code if desired.
1171
1172Below is the complete list of the currently supported symbolic operators
1173with examples. See the iASL User Guide for additional information.
1174
1175
1176ASL+ Syntax      Legacy ASL Equivalent
1177-----------      ---------------------
1178
1179    // Math operators
1180
1181Z = X + Y        Add (X, Y, Z)
1182Z = X - Y        Subtract (X, Y, Z)
1183Z = X * Y        Multiply (X, Y, Z)
1184Z = X / Y        Divide (X, Y, , Z)
1185Z = X % Y        Mod (X, Y, Z)
1186Z = X << Y       ShiftLeft (X, Y, Z)
1187Z = X >> Y       ShiftRight (X, Y, Z)
1188Z = X & Y        And (X, Y, Z)
1189Z = X | Y        Or (X, Y, Z)
1190Z = X ^ Y        Xor (X, Y, Z)
1191Z = ~X           Not (X, Z)
1192X++              Increment (X)
1193X--              Decrement (X)
1194
1195    // Logical operators
1196
1197(X == Y)         LEqual (X, Y)
1198(X != Y)         LNotEqual (X, Y)
1199(X < Y)          LLess (X, Y)
1200(X > Y)          LGreater (X, Y)
1201(X <= Y)         LLessEqual (X, Y)
1202(X >= Y)         LGreaterEqual (X, Y)
1203(X && Y)         LAnd (X, Y)
1204(X || Y)         LOr (X, Y)
1205(!X)             LNot (X)
1206
1207    // Assignment and compound assignment operations
1208
1209X = Y           Store (Y, X)
1210X += Y          Add (X, Y, X)
1211X -= Y          Subtract (X, Y, X)
1212X *= Y          Multiply (X, Y, X)
1213X /= Y          Divide (X, Y, , X)
1214X %= Y          Mod (X, Y, X)
1215X <<= Y         ShiftLeft (X, Y, X)
1216X >>= Y         ShiftRight (X, Y, X)
1217X &= Y          And (X, Y, X)
1218X |= Y          Or (X, Y, X)
1219X ^= Y          Xor (X, Y, X)
1220
1221
12223) ASL+ Examples:
1223-----------------
1224
1225Legacy ASL:
1226        If (LOr (LOr (LEqual (And (R510, 0x03FB), 0x02E0), LEqual (
1227            And (R520, 0x03FB), 0x02E0)), LOr (LEqual (And (R530,
12280x03FB),
1229            0x02E0), LEqual (And (R540, 0x03FB), 0x02E0))))
1230        {
1231            And (MEMB, 0xFFFFFFF0, SRMB)
1232            Store (MEMB, Local2)
1233            Store (PDBM, Local1)
1234            And (PDBM, 0xFFFFFFFFFFFFFFF9, PDBM)
1235            Store (SRMB, MEMB)
1236            Or (PDBM, 0x02, PDBM)
1237        }
1238
1239ASL+ version:
1240        If (((R510 & 0x03FB) == 0x02E0) ||
1241            ((R520 & 0x03FB) == 0x02E0) ||
1242            ((R530 & 0x03FB) == 0x02E0) ||
1243            ((R540 & 0x03FB) == 0x02E0))
1244        {
1245            SRMB = (MEMB & 0xFFFFFFF0)
1246            Local2 = MEMB
1247            Local1 = PDBM
1248            PDBM &= 0xFFFFFFFFFFFFFFF9
1249            MEMB = SRMB
1250            PDBM |= 0x02
1251        }
1252
1253Legacy ASL:
1254        Store (0x1234, Local1)
1255        Multiply (Add (Add (Local1, TEST), 0x20), Local2, Local3)
1256        Multiply (Local2, Add (Add (Local1, TEST), 0x20), Local3)
1257        Add (Local1, Add (TEST, Multiply (0x20, Local2)), Local3)
1258        Store (Index (PKG1, 0x03), Local6)
1259        Store (Add (Local3, Local2), Debug)
1260        Add (Local1, 0x0F, Local2)
1261        Add (Local1, Multiply (Local2, Local3), Local2)
1262        Multiply (Add (Add (Local1, TEST), 0x20), ToBCD (Local1), Local3)
1263
1264ASL+ version:
1265        Local1 = 0x1234
1266        Local3 = (((Local1 + TEST) + 0x20) * Local2)
1267        Local3 = (Local2 * ((Local1 + TEST) + 0x20))
1268        Local3 = (Local1 + (TEST + (0x20 * Local2)))
1269        Local6 = Index (PKG1, 0x03)
1270        Debug = (Local3 + Local2)
1271        Local2 = (Local1 + 0x0F)
1272        Local2 = (Local1 + (Local2 * Local3))
1273        Local3 = (((Local1 + TEST) + 0x20) * ToBCD (Local1))
1274
1275
1276----------------------------------------
127726 September 2014. Summary of changes for version 20140926:
1278
12791) ACPICA kernel-resident subsystem:
1280
1281Updated the GPIO operation region handler interface (GeneralPurposeIo).
1282In order to support GPIO Connection objects with multiple pins, along
1283with the related Field objects, the following changes to the interface
1284have been made: The Address is now defined to be the offset in bits of
1285the field unit from the previous invocation of a Connection. It can be
1286viewed as a "Pin Number Index" into the connection resource descriptor.
1287The BitWidth is the exact bit width of the field. It is usually one bit,
1288but not always. See the ACPICA reference guide (section 8.8.6.2.1) for
1289additional information and examples.
1290
1291GPE support: During ACPICA/GPE initialization, ensure that all GPEs with
1292corresponding _Lxx/_Exx methods are disabled (they may have been enabled
1293by the firmware), so that they cannot fire until they are enabled via
1294AcpiUpdateAllGpes. Rafael J. Wysocki.
1295
1296Added a new return flag for the Event/GPE status interfaces --
1297AcpiGetEventStatus and AcpiGetGpeStatus. The new
1298ACPI_EVENT_FLAGS_HAS_HANDLER flag is used to indicate that the event or
1299GPE currently has a handler associated with it, and can thus actually
1300affect the system. Lv Zheng.
1301
1302Example Code and Data Size: These are the sizes for the OS-independent
1303acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1304debug version of the code includes the debug output trace mechanism and
1305has a much larger code and data size.
1306
1307  Current Release:
1308    Non-Debug Version:  99.1K Code, 27.3K Data, 126.4K Total
1309    Debug Version:     192.8K Code, 79.9K Data, 272.7K Total
1310  Previous Release:
1311    Non-Debug Version:  98.8K Code, 27.3K Data, 126.1K Total
1312    Debug Version:     192.1K Code, 79.8K Data, 271.9K Total
1313
13142) iASL Compiler/Disassembler and Tools:
1315
1316iASL: Fixed a memory allocation/free regression introduced in 20140828
1317that could cause the compiler to crash. This was introduced inadvertently
1318during the effort to eliminate compiler memory leaks. ACPICA BZ 1111,
13191113.
1320
1321iASL: Removed two error messages that have been found to create false
1322positives, until they can be fixed and fully validated (ACPICA BZ 1112):
13231) Illegal forward reference within a method
13242) Illegal reference across two methods
1325
1326iASL: Implemented a new option (-lm) to create a hardware mapping file
1327that summarizes all GPIO, I2C, SPI, and UART connections. This option
1328works for both the compiler and disassembler. See the iASL compiler user
1329guide for additional information and examples (section 6.4.6).
1330
1331AcpiDump: Added support for the version 1 (ACPI 1.0) RSDP in addition to
1332version 2. This corrects the AE_BAD_HEADER exception seen on systems with
1333a version 1 RSDP. Lv Zheng ACPICA BZ 1097.
1334
1335AcpiExec: For Unix versions, don't attempt to put STDIN into raw mode
1336unless STDIN is actually a terminal. Assists with batch-mode processing.
1337ACPICA BZ 1114.
1338
1339Disassembler/AcpiHelp: Added another large group of recognized _HID
1340values.
1341
1342
1343----------------------------------------
134428 August 2014. Summary of changes for version 20140828:
1345
13461) ACPICA kernel-resident subsystem:
1347
1348Fixed a problem related to the internal use of the Timer() operator where
1349a 64-bit divide could cause an attempted link to a double-precision math
1350library. This divide is not actually necessary, so the code was
1351restructured to eliminate it. Lv Zheng.
1352
1353ACPI 5.1: Added support for the runtime validation of the _DSD package
1354(similar to the iASL support).
1355
1356ACPI 5.1/Headers: Added support for the GICC affinity subtable to the
1357SRAT table. Hanjun Guo <hanjun.guo@linaro.org>.
1358
1359Example Code and Data Size: These are the sizes for the OS-independent
1360acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1361debug version of the code includes the debug output trace mechanism and
1362has a much larger code and data size.
1363
1364  Current Release:
1365    Non-Debug Version:  98.8K Code, 27.3K Data, 126.1K Total
1366    Debug Version:     192.1K Code, 79.8K Data, 271.9K Total
1367  Previous Release:
1368    Non-Debug Version:  98.7K Code, 27.3K Data, 126.0K Total1
1369    Debug Version:     192.0K Code, 79.7K Data, 271.7K Total
1370
13712) iASL Compiler/Disassembler and Tools:
1372
1373AcpiExec: Fixed a problem on unix systems where the original terminal
1374state was not always properly restored upon exit. Seen when using the -v
1375option. ACPICA BZ 1104.
1376
1377iASL: Fixed a problem with the validation of the ranges/length within the
1378Memory24 resource descriptor. There was a boundary condition when the
1379range was equal to the (length -1) caused by the fact that these values
1380are defined in 256-byte blocks, not bytes. ACPICA BZ 1098
1381
1382Disassembler: Fixed a problem with the GpioInt descriptor interrupt
1383polarity
1384flags. The flags are actually 2 bits, not 1, and the "ActiveBoth" keyword
1385is
1386now supported properly.
1387
1388ACPI 5.1: Added the GICC affinity subtable to the SRAT table. Supported
1389in the disassembler, data table compiler, and table template generator.
1390
1391iASL: Added a requirement for Device() objects that one of either a _HID
1392or _ADR must exist within the scope of a Device, as per the ACPI
1393specification. Remove a similar requirement that was incorrectly in place
1394for the _DSD object.
1395
1396iASL: Added error detection for illegal named references within control
1397methods that would cause runtime failures. Now trapped as errors are: 1)
1398References to objects within a non-parent control method. 2) Forward
1399references (within a method) -- for control methods, AML interpreters use
1400a one-pass parse of control methods. ACPICA BZ 1008.
1401
1402iASL: Added error checking for dependencies related to the _PSx power
1403methods. ACPICA BZ 1029.
14041) For _PS0, one of these must exist within the same scope: _PS1, _PS2,
1405_PS3.
14062) For _PS1, _PS2, and PS3: A _PS0 object must exist within the same
1407scope.
1408
1409iASL and table compiler: Cleanup miscellaneous memory leaks by fully
1410deploying the existing object and string caches and adding new caches for
1411the table compiler.
1412
1413iASL: Split the huge parser source file into multiple subfiles to improve
1414manageability. Generation now requires the M4 macro preprocessor, which
1415is part of the Bison distribution on both unix and windows platforms.
1416
1417AcpiSrc: Fixed and removed all extraneous warnings generated during
1418entire ACPICA source code scan and/or conversion.
1419
1420
1421----------------------------------------
1422
142324 July 2014. Summary of changes for version 20140724:
1424
1425The ACPI 5.1 specification has been released and is available at:
1426http://uefi.org/specs/access
1427
1428
14290) ACPI 5.1 support in ACPICA:
1430
1431ACPI 5.1 is fully supported in ACPICA as of this release.
1432
1433New predefined names. Support includes iASL and runtime ACPICA
1434validation.
1435    _CCA (Cache Coherency Attribute).
1436    _DSD (Device-Specific Data). David Box.
1437
1438Modifications to existing ACPI tables. Support includes headers, iASL
1439Data Table compiler, disassembler, and the template generator.
1440    FADT - New fields and flags. Graeme Gregory.
1441    GTDT - One new subtable and new fields. Tomasz Nowicki.
1442    MADT - Two new subtables. Tomasz Nowicki.
1443    PCCT - One new subtable.
1444
1445Miscellaneous.
1446    New notification type for System Resource Affinity change events.
1447
1448
14491) ACPICA kernel-resident subsystem:
1450
1451Fixed a regression introduced in 20140627 where a fault can happen during
1452the deletion of Alias AML namespace objects. The problem affected both
1453the core ACPICA and the ACPICA tools including iASL and AcpiExec.
1454
1455Implemented a new GPE public interface, AcpiMarkGpeForWake. Provides a
1456simple mechanism to enable wake GPEs that have no associated handler or
1457control method. Rafael Wysocki.
1458
1459Updated the AcpiEnableGpe interface to disallow the enable if there is no
1460handler or control method associated with the particular GPE. This will
1461help avoid meaningless GPEs and even GPE floods. Rafael Wysocki.
1462
1463Updated GPE handling and dispatch by disabling the GPE before clearing
1464the status bit for edge-triggered GPEs. Lv Zheng.
1465
1466Added Timer() support to the AML Debug object. The current timer value is
1467now displayed with each invocation of (Store to) the debug object to
1468enable simple generation of execution times for AML code (method
1469execution for example.) ACPICA BZ 1093.
1470
1471Example Code and Data Size: These are the sizes for the OS-independent
1472acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1473debug version of the code includes the debug output trace mechanism and
1474has a much larger code and data size.
1475
1476  Current Release:
1477    Non-Debug Version:  98.7K Code, 27.3K Data, 126.0K Total
1478    Debug Version:     192.0K Code, 79.7K Data, 271.7K Total
1479  Previous Release:
1480    Non-Debug Version:  98.7K Code, 27.2K Data, 125.9K Total
1481    Debug Version:     191.7K Code, 79.6K Data, 271.3K Total
1482
1483
14842) iASL Compiler/Disassembler and Tools:
1485
1486Fixed an issue with the recently added local printf implementation,
1487concerning width/precision specifiers that could cause incorrect output.
1488Lv Zheng. ACPICA BZ 1094.
1489
1490Disassembler: Added support to detect buffers that contain UUIDs and
1491disassemble them to an invocation of the ToUUID operator. Also emit
1492commented descriptions of known ACPI-related UUIDs.
1493
1494AcpiHelp: Added support to display known ACPI-related UUIDs. New option,
1495-u. Adds three new files.
1496
1497iASL: Update table compiler and disassembler for DMAR table changes that
1498were introduced in September 2013. With assistance by David Woodhouse.
1499
1500----------------------------------------
150127 June 2014. Summary of changes for version 20140627:
1502
15031) ACPICA kernel-resident subsystem:
1504
1505Formatted Output: Implemented local versions of standard formatted output
1506utilities such as printf, etc. Over time, it has been discovered that
1507there are in fact many portability issues with printf, and the addition
1508of this feature will fix/prevent these issues once and for all. Some
1509known issues are summarized below:
1510
15111) Output of 64-bit values is not portable. For example, UINT64 is %ull
1512for the Linux kernel and is %uI64 for some MSVC versions.
15132) Invoking printf consistently in a manner that is portable across both
151432-bit and 64-bit platforms is difficult at best in many situations.
15153) The output format for pointers varies from system to system (leading
1516zeros especially), and leads to inconsistent output from ACPICA across
1517platforms.
15184) Certain platform-specific printf formats may conflict with ACPICA use.
15195) If there is no local C library available, ACPICA now has local support
1520for printf.
1521
1522-- To address these printf issues in a complete manner, ACPICA now
1523directly implements a small subset of printf format specifiers, only
1524those that it requires. Adds a new file, utilities/utprint.c. Lv Zheng.
1525
1526Implemented support for ACPICA generation within the EFI environment.
1527Initially, the AcpiDump utility is supported in the UEFI shell
1528environment. Lv Zheng.
1529
1530Added a new external interface, AcpiLogError, to improve ACPICA
1531portability. This allows the host to redirect error messages from the
1532ACPICA utilities. Lv Zheng.
1533
1534Added and deployed new OSL file I/O interfaces to improve ACPICA
1535portability:
1536  AcpiOsOpenFile
1537  AcpiOsCloseFile
1538  AcpiOsReadFile
1539  AcpiOsWriteFile
1540  AcpiOsGetFileOffset
1541  AcpiOsSetFileOffset
1542There are C library implementations of these functions in the new file
1543service_layers/oslibcfs.c -- however, the functions can be implemented by
1544the local host in any way necessary. Lv Zheng.
1545
1546Implemented a mechanism to disable/enable ACPI table checksum validation
1547at runtime. This can be useful when loading tables very early during OS
1548initialization when it may not be possible to map the entire table in
1549order to compute the checksum. Lv Zheng.
1550
1551Fixed a buffer allocation issue for the Generic Serial Bus support.
1552Originally, a fixed buffer length was used. This change allows for
1553variable-length buffers based upon the protocol indicated by the field
1554access attributes. Reported by Lan Tianyu. Lv Zheng.
1555
1556Fixed a problem where an object detached from a namespace node was not
1557properly terminated/cleared and could cause a circular list problem if
1558reattached. ACPICA BZ 1063. David Box.
1559
1560Fixed a possible recursive lock acquisition in hwregs.c. Rakib Mullick.
1561
1562Fixed a possible memory leak in an error return path within the function
1563AcpiUtCopyIobjectToIobject. ACPICA BZ 1087. Colin Ian King.
1564
1565Example Code and Data Size: These are the sizes for the OS-independent
1566acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1567debug version of the code includes the debug output trace mechanism and
1568has a much larger code and data size.
1569
1570  Current Release:
1571    Non-Debug Version:  98.7K Code, 27.2K Data, 125.9K Total
1572    Debug Version:     191.7K Code, 79.6K Data, 271.3K Total
1573  Previous Release:
1574    Non-Debug Version:  96.8K Code, 27.2K Data, 124.0K Total
1575    Debug Version:     189.5K Code, 79.7K Data, 269.2K Total
1576
1577
15782) iASL Compiler/Disassembler and Tools:
1579
1580Disassembler: Add dump of ASCII equivalent text within a comment at the
1581end of each line of the output for the Buffer() ASL operator.
1582
1583AcpiDump: Miscellaneous changes:
1584  Fixed repetitive table dump in -n mode.
1585  For older EFI platforms, use the ACPI 1.0 GUID during RSDP search if
1586the ACPI 2.0 GUID fails.
1587
1588iASL: Fixed a problem where the compiler could fault if incorrectly given
1589an acpidump output file as input. ACPICA BZ 1088. David Box.
1590
1591AcpiExec/AcpiNames: Fixed a problem where these utilities could fault if
1592they are invoked without any arguments.
1593
1594Debugger: Fixed a possible memory leak in an error return path. ACPICA BZ
15951086. Colin Ian King.
1596
1597Disassembler: Cleaned up a block of code that extracts a parent Op
1598object. Added a comment that explains that the parent is guaranteed to be
1599valid in this case. ACPICA BZ 1069.
1600
1601
1602----------------------------------------
160324 April 2014. Summary of changes for version 20140424:
1604
16051) ACPICA kernel-resident subsystem:
1606
1607Implemented support to skip/ignore NULL address entries in the RSDT/XSDT.
1608Some of these tables are known to contain a trailing NULL entry. Lv
1609Zheng.
1610
1611Removed an extraneous error message for the case where there are a large
1612number of system GPEs (> 124). This was the "32-bit FADT register is too
1613long to convert to GAS struct" message, which is irrelevant for GPEs
1614since the GPEx_BLK_LEN fields of the FADT are always used instead of the
1615(limited capacity) GAS bit length. Also, several changes to ensure proper
1616support for GPE numbers > 255, where some "GPE number" fields were 8-bits
1617internally.
1618
1619Implemented and deployed additional configuration support for the public
1620ACPICA external interfaces. Entire classes of interfaces can now be
1621easily modified or configured out, replaced by stubbed inline functions
1622by default. Lv Zheng.
1623
1624Moved all public ACPICA runtime configuration globals to the public
1625ACPICA external interface file for convenience. Also, removed some
1626obsolete/unused globals. See the file acpixf.h. Lv Zheng.
1627
1628Documentation: Added a new section to the ACPICA reference describing the
1629maximum number of GPEs that can be supported by the FADT-defined GPEs in
1630block zero and one. About 1200 total. See section 4.4.1 of the ACPICA
1631reference.
1632
1633Example Code and Data Size: These are the sizes for the OS-independent
1634acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1635debug version of the code includes the debug output trace mechanism and
1636has a much larger code and data size.
1637
1638  Current Release:
1639    Non-Debug Version:  96.8K Code, 27.2K Data, 124.0K Total
1640    Debug Version:     189.5K Code, 79.7K Data, 269.2K Total
1641  Previous Release:
1642    Non-Debug Version:  97.0K Code, 27.2K Data, 124.2K Total
1643    Debug Version:     189.7K Code, 79.5K Data, 269.2K Total
1644
1645
16462) iASL Compiler/Disassembler and Tools:
1647
1648iASL and disassembler: Add full support for the LPIT table (Low Power
1649Idle Table). Includes support in the disassembler, data table compiler,
1650and template generator.
1651
1652AcpiDump utility:
16531) Add option to force the use of the RSDT (over the XSDT).
16542) Improve validation of the RSDP signature (use 8 chars instead of 4).
1655
1656iASL: Add check for predefined packages that are too large.  For
1657predefined names that contain subpackages, check if each subpackage is
1658too large. (Check for too small already exists.)
1659
1660Debugger: Updated the GPE command (which simulates a GPE by executing the
1661GPE code paths in ACPICA). The GPE device is now optional, and defaults
1662to the GPE 0/1 FADT-defined blocks.
1663
1664Unix application OSL: Update line-editing support. Add additional error
1665checking and take care not to reset terminal attributes on exit if they
1666were never set. This should help guarantee that the terminal is always
1667left in the previous state on program exit.
1668
1669
1670----------------------------------------
167125 March 2014. Summary of changes for version 20140325:
1672
16731) ACPICA kernel-resident subsystem:
1674
1675Updated the auto-serialize feature for control methods. This feature
1676automatically serializes all methods that create named objects in order
1677to prevent runtime errors. The update adds support to ignore the
1678currently executing AML SyncLevel when invoking such a method, in order
1679to prevent disruption of any existing SyncLevel priorities that may exist
1680in the AML code. Although the use of SyncLevels is relatively rare, this
1681change fixes a regression where an AE_AML_MUTEX_ORDER exception can
1682appear on some machines starting with the 20140214 release.
1683
1684Added a new external interface to allow the host to install ACPI tables
1685very early, before the namespace is even created. AcpiInstallTable gives
1686the host additional flexibility for ACPI table management. Tables can be
1687installed directly by the host as if they had originally appeared in the
1688XSDT/RSDT. Installed tables can be SSDTs or other ACPI data tables
1689(anything except the DSDT and FACS). Adds a new file, tbdata.c, along
1690with additional internal restructuring and cleanup. See the ACPICA
1691Reference for interface details. Lv Zheng.
1692
1693Added validation of the checksum for all incoming dynamically loaded
1694tables (via external interfaces or via AML Load/LoadTable operators). Lv
1695Zheng.
1696
1697Updated the use of the AcpiOsWaitEventsComplete interface during Notify
1698and GPE handler removal. Restructured calls to eliminate possible race
1699conditions. Lv Zheng.
1700
1701Added a warning for the use/execution of the ASL/AML Unload (table)
1702operator. This will help detect and identify machines that use this
1703operator if and when it is ever used. This operator has never been seen
1704in the field and the usage model and possible side-effects of the drastic
1705runtime action of a full table removal are unknown.
1706
1707Reverted the use of #pragma push/pop which was introduced in the 20140214
1708release. It appears that push and pop are not implemented by enough
1709compilers to make the use of this feature feasible for ACPICA at this
1710time. However, these operators may be deployed in a future ACPICA
1711release.
1712
1713Added the missing EXPORT_SYMBOL macros for the install and remove SCI
1714handler interfaces.
1715
1716Source code generation:
17171) Disabled the use of the "strchr" macro for the gcc-specific
1718generation. For some versions of gcc, this macro can periodically expose
1719a compiler bug which in turn causes compile-time error(s).
17202) Added support for PPC64 compilation. Colin Ian King.
1721
1722Example Code and Data Size: These are the sizes for the OS-independent
1723acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1724debug version of the code includes the debug output trace mechanism and
1725has a much larger code and data size.
1726
1727  Current Release:
1728    Non-Debug Version:  97.0K Code, 27.2K Data, 124.2K Total
1729    Debug Version:     189.7K Code, 79.5K Data, 269.2K Total
1730  Previous Release:
1731    Non-Debug Version:  96.5K Code, 27.2K Data, 123.7K Total
1732    Debug Version:     188.6K Code, 79.0K Data, 267.6K Total
1733
1734
17352) iASL Compiler/Disassembler and Tools:
1736
1737Disassembler: Added several new features to improve the readability of
1738the resulting ASL code. Extra information is emitted within comment
1739fields in the ASL code:
17401) Known _HID/_CID values are decoded to descriptive text.
17412) Standard values for the Notify() operator are decoded to descriptive
1742text.
17433) Target operands are expanded to full pathnames (in a comment) when
1744possible.
1745
1746Disassembler: Miscellaneous updates for extern() handling:
17471) Abort compiler if file specified by -fe option does not exist.
17482) Silence unnecessary warnings about argument count mismatches.
17493) Update warning messages concerning unresolved method externals.
17504) Emit "UnknownObj" keyword for externals whose type cannot be
1751determined.
1752
1753AcpiHelp utility:
17541) Added the -a option to display both the ASL syntax and the AML
1755encoding for an input ASL operator. This effectively displays all known
1756information about an ASL operator with one AcpiHelp invocation.
17572) Added substring match support (similar to a wildcard) for the -i
1758(_HID/PNP IDs) option.
1759
1760iASL/Disassembler: Since this tool does not yet support execution on big-
1761endian machines, added detection of endianness and an error message if
1762execution is attempted on big-endian. Support for big-endian within iASL
1763is a feature that is on the ACPICA to-be-done list.
1764
1765AcpiBin utility:
17661) Remove option to extract binary files from an acpidump; this function
1767is made obsolete by the AcpiXtract utility.
17682) General cleanup of open files and allocated buffers.
1769
1770
1771----------------------------------------
177214 February 2014. Summary of changes for version 20140214:
1773
17741) ACPICA kernel-resident subsystem:
1775
1776Implemented a new mechanism to proactively prevent problems with ill-
1777behaved reentrant control methods that create named ACPI objects. This
1778behavior is illegal as per the ACPI specification, but is nonetheless
1779frequently seen in the field. Previously, this could lead to an
1780AE_ALREADY_EXISTS exception if the method was actually entered by more
1781than one thread. This new mechanism detects such methods at table load
1782time and marks them "serialized" to prevent reentrancy. A new global
1783option, AcpiGbl_AutoSerializeMethods, has been added to disable this
1784feature if desired. This mechanism and global option obsoletes and
1785supersedes the previous AcpiGbl_SerializeAllMethods option.
1786
1787Added the "Windows 2013" string to the _OSI support. ACPICA will now
1788respond TRUE to _OSI queries with this string. It is the stated policy of
1789ACPICA to add new strings to the _OSI support as soon as possible after
1790they are defined. See the full ACPICA _OSI policy which has been added to
1791the utilities/utosi.c file.
1792
1793Hardened/updated the _PRT return value auto-repair code:
17941) Do not abort the repair on a single subpackage failure, continue to
1795check all subpackages.
17962) Add check for the minimum subpackage length (4).
17973) Properly handle extraneous NULL package elements.
1798
1799Added support to avoid the possibility of infinite loops when traversing
1800object linked lists. Never allow an infinite loop, even in the face of
1801corrupted object lists.
1802
1803ACPICA headers: Deployed the use of #pragma pack(push) and #pragma
1804pack(pop) directives to ensure that the ACPICA headers are independent of
1805compiler settings or other host headers.
1806
1807Example Code and Data Size: These are the sizes for the OS-independent
1808acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1809debug version of the code includes the debug output trace mechanism and
1810has a much larger code and data size.
1811
1812  Current Release:
1813    Non-Debug Version:  96.5K Code, 27.2K Data, 123.7K Total
1814    Debug Version:     188.6K Code, 79.0K Data, 267.6K Total
1815  Previous Release:
1816    Non-Debug Version:  96.2K Code, 27.0K Data, 123.2K Total
1817    Debug Version:     187.5K Code, 78.3K Data, 265.8K Total
1818
1819
18202) iASL Compiler/Disassembler and Tools:
1821
1822iASL/Table-compiler: Fixed a problem with support for the SPMI table. The
1823first reserved field was incorrectly forced to have a value of zero. This
1824change correctly forces the field to have a value of one. ACPICA BZ 1081.
1825
1826Debugger: Added missing support for the "Extra" and "Data" subobjects
1827when displaying object data.
1828
1829Debugger: Added support to display entire object linked lists when
1830displaying object data.
1831
1832iASL: Removed the obsolete -g option to obtain ACPI tables from the
1833Windows registry. This feature has been superseded by the acpidump
1834utility.
1835
1836
1837----------------------------------------
183814 January 2014. Summary of changes for version 20140114:
1839
18401) ACPICA kernel-resident subsystem:
1841
1842Updated all ACPICA copyrights and signons to 2014. Added the 2014
1843copyright to all module headers and signons, including the standard Linux
1844header. This affects virtually every file in the ACPICA core subsystem,
1845iASL compiler, all ACPICA utilities, and the test suites.
1846
1847Improved parameter validation for AcpiInstallGpeBlock. Added the
1848following checks:
18491) The incoming device handle refers to type ACPI_TYPE_DEVICE.
18502) There is not already a GPE block attached to the device.
1851Likewise, with AcpiRemoveGpeBlock, ensure that the incoming object is a
1852device.
1853
1854Correctly support "references" in the ACPI_OBJECT. This change fixes the
1855support to allow references (namespace nodes) to be passed as arguments
1856to control methods via the evaluate object interface. This is probably
1857most useful for testing purposes, however.
1858
1859Improved support for 32/64 bit physical addresses in printf()-like
1860output. This change improves the support for physical addresses in printf
1861debug statements and other output on both 32-bit and 64-bit hosts. It
1862consistently outputs the appropriate number of bytes for each host. The
1863%p specifier is unsatisfactory since it does not emit uniform output on
1864all hosts/clib implementations (on some, leading zeros are not supported,
1865leading to difficult-to-read output).
1866
1867Example Code and Data Size: These are the sizes for the OS-independent
1868acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1869debug version of the code includes the debug output trace mechanism and
1870has a much larger code and data size.
1871
1872  Current Release:
1873    Non-Debug Version:  96.2K Code, 27.0K Data, 123.2K Total
1874    Debug Version:     187.5K Code, 78.3K Data, 265.8K Total
1875  Previous Release:
1876    Non-Debug Version:  96.1K Code, 27.0K Data, 123.1K Total
1877    Debug Version:     185.6K Code, 77.3K Data, 262.9K Total
1878
1879
18802) iASL Compiler/Disassembler and Tools:
1881
1882iASL: Fix a possible fault when using the Connection() operator. Fixes a
1883problem if the parent Field definition for the Connection operator refers
1884to an operation region that does not exist. ACPICA BZ 1064.
1885
1886AcpiExec: Load of local test tables is now optional. The utility has the
1887capability to load some various tables to test features of ACPICA.
1888However, there are enough of them that the output of the utility became
1889confusing. With this change, only the required local tables are displayed
1890(RSDP, XSDT, etc.) along with the actual tables loaded via the command
1891line specification. This makes the default output simler and easier to
1892understand. The -el command line option restores the original behavior
1893for testing purposes.
1894
1895AcpiExec: Added support for overlapping operation regions. This change
1896expands the simulation of operation regions by supporting regions that
1897overlap within the given address space. Supports SystemMemory and
1898SystemIO. ASLTS test suite updated also. David Box. ACPICA BZ 1031.
1899
1900AcpiExec: Added region handler support for PCI_Config and EC spaces. This
1901allows AcpiExec to simulate these address spaces, similar to the current
1902support for SystemMemory and SystemIO.
1903
1904Debugger: Added new command to read/write/compare all namespace objects.
1905The command "test objects" will exercise the entire namespace by writing
1906new values to each data object, and ensuring that the write was
1907successful. The original value is then restored and verified.
1908
1909Debugger: Added the "test predefined" command. This change makes this
1910test public and puts it under the new "test" command. The test executes
1911each and every predefined name within the current namespace.
1912
1913
1914----------------------------------------
191518 December 2013. Summary of changes for version 20131218:
1916
1917Global note: The ACPI 5.0A specification was released this month. There
1918are no changes needed for ACPICA since this release of ACPI is an
1919errata/clarification release. The specification is available at
1920acpi.info.
1921
1922
19231) ACPICA kernel-resident subsystem:
1924
1925Added validation of the XSDT root table if it is present. Some older
1926platforms contain an XSDT that is ill-formed or otherwise invalid (such
1927as containing some or all entries that are NULL pointers). This change
1928adds a new function to validate the XSDT before actually using it. If the
1929XSDT is found to be invalid, ACPICA will now automatically fall back to
1930using the RSDT instead. Original implementation by Zhao Yakui. Ported to
1931ACPICA and enhanced by Lv Zheng and Bob Moore.
1932
1933Added a runtime option to ignore the XSDT and force the use of the RSDT.
1934This change adds a runtime option that will force ACPICA to use the RSDT
1935instead of the XSDT (AcpiGbl_DoNotUseXsdt). Although the ACPI spec
1936requires that an XSDT be used instead of the RSDT, the XSDT has been
1937found to be corrupt or ill-formed on some machines. Lv Zheng.
1938
1939Added a runtime option to favor 32-bit FADT register addresses over the
194064-bit addresses. This change adds an option to favor 32-bit FADT
1941addresses when there is a conflict between the 32-bit and 64-bit versions
1942of the same register. The default behavior is to use the 64-bit version
1943in accordance with the ACPI specification. This can now be overridden via
1944the AcpiGbl_Use32BitFadtAddresses flag. ACPICA BZ 885. Lv Zheng.
1945
1946During the change above, the internal "Convert FADT" and "Verify FADT"
1947functions have been merged to simplify the code, making it easier to
1948understand and maintain. ACPICA BZ 933.
1949
1950Improve exception reporting and handling for GPE block installation.
1951Return an actual status from AcpiEvGetGpeXruptBlock and don't clobber the
1952status when exiting AcpiEvInstallGpeBlock. ACPICA BZ 1019.
1953
1954Added helper macros to extract bus/segment numbers from the HEST table.
1955This change adds two macros to extract the encoded bus and segment
1956numbers from the HEST Bus field - ACPI_HEST_BUS and ACPI_HEST_SEGMENT.
1957Betty Dall <betty.dall@hp.com>
1958
1959Removed the unused ACPI_FREE_BUFFER macro. This macro is no longer used
1960by ACPICA. It is not a public macro, so it should have no effect on
1961existing OSV code. Lv Zheng.
1962
1963Example Code and Data Size: These are the sizes for the OS-independent
1964acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1965debug version of the code includes the debug output trace mechanism and
1966has a much larger code and data size.
1967
1968  Current Release:
1969    Non-Debug Version:  96.1K Code, 27.0K Data, 123.1K Total
1970    Debug Version:     185.6K Code, 77.3K Data, 262.9K Total
1971  Previous Release:
1972    Non-Debug Version:  95.9K Code, 27.0K Data, 122.9K Total
1973    Debug Version:     185.1K Code, 77.2K Data, 262.3K Total
1974
1975
19762) iASL Compiler/Disassembler and Tools:
1977
1978Disassembler: Improved pathname support for emitted External()
1979statements. This change adds full pathname support for external names
1980that have been resolved internally by the inclusion of additional ACPI
1981tables (via the iASL -e option). Without this change, the disassembler
1982can emit multiple externals for the same object, or it become confused
1983when the Scope() operator is used on an external object. Overall, greatly
1984improves the ability to actually recompile the emitted ASL code when
1985objects a referenced across multiple ACPI tables. Reported by Michael
1986Tsirkin (mst@redhat.com).
1987
1988Tests/ASLTS: Updated functional control suite to execute with no errors.
1989David Box. Fixed several errors related to the testing of the interpreter
1990slack mode. Lv Zheng.
1991
1992iASL: Added support to detect names that are declared within a control
1993method, but are unused (these are temporary names that are only valid
1994during the time the method is executing). A remark is issued for these
1995cases. ACPICA BZ 1022.
1996
1997iASL: Added full support for the DBG2 table. Adds full disassembler,
1998table compiler, and template generator support for the DBG2 table (Debug
1999Port 2 table).
2000
2001iASL: Added full support for the PCCT table, update the table definition.
2002Updates the PCCT table definition in the actbl3.h header and adds table
2003compiler and template generator support.
2004
2005iASL: Added an option to emit only error messages (no warnings/remarks).
2006The -ve option will enable only error messages, warnings and remarks are
2007suppressed. This can simplify debugging when only the errors are
2008important, such as when an ACPI table is disassembled and there are many
2009warnings and remarks -- but only the actual errors are of real interest.
2010
2011Example ACPICA code (source/tools/examples): Updated the example code so
2012that it builds to an actual working program, not just example code. Added
2013ACPI tables and execution of an example control method in the DSDT. Added
2014makefile support for Unix generation.
2015
2016
2017----------------------------------------
201815 November 2013. Summary of changes for version 20131115:
2019
2020This release is available at https://acpica.org/downloads
2021
2022
20231) ACPICA kernel-resident subsystem:
2024
2025Resource Manager: Fixed loop termination for the "get AML length"
2026function. The loop previously had an error termination on a NULL resource
2027pointer, which can never happen since the loop simply increments a valid
2028resource pointer. This fix changes the loop to terminate with an error on
2029an invalid end-of-buffer condition. The problem can be seen as an
2030infinite loop by callers to AcpiSetCurrentResources with an invalid or
2031corrupted resource descriptor, or a resource descriptor that is missing
2032an END_TAG descriptor. Reported by Dan Carpenter
2033<dan.carpenter@oracle.com>. Lv Zheng, Bob Moore.
2034
2035Table unload and ACPICA termination: Delete all attached data objects
2036during namespace node deletion. This fix updates namespace node deletion
2037to delete the entire list of attached objects (attached via
2038AcpiAttachObject) instead of just one of the attached items. ACPICA BZ
20391024. Tomasz Nowicki (tomasz.nowicki@linaro.org).
2040
2041ACPICA termination: Added support to delete all objects attached to the
2042root namespace node. This fix deletes any and all objects that have been
2043attached to the root node via AcpiAttachData. Previously, none of these
2044objects were deleted. Reported by Tomasz Nowicki. ACPICA BZ 1026.
2045
2046Debug output: Do not emit the function nesting level for the in-kernel
2047build. The nesting level is really only useful during a single-thread
2048execution. Therefore, only enable this output for the AcpiExec utility.
2049Also, only emit the thread ID when executing under AcpiExec (Context
2050switches are still always detected and a message is emitted). ACPICA BZ
2051972.
2052
2053Example Code and Data Size: These are the sizes for the OS-independent
2054acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2055debug version of the code includes the debug output trace mechanism and
2056has a much larger code and data size.
2057
2058  Current Release:
2059    Non-Debug Version:  95.9K Code, 27.0K Data, 122.9K Total
2060    Debug Version:     185.1K Code, 77.2K Data, 262.3K Total
2061  Previous Release:
2062    Non-Debug Version:  95.8K Code, 27.0K Data, 122.8K Total
2063    Debug Version:     185.2K Code, 77.2K Data, 262.4K Total
2064
2065
20662) iASL Compiler/Disassembler and Tools:
2067
2068AcpiExec/Unix-OSL: Use <termios.h> instead of <termio.h>. This is the
2069correct portable POSIX header for terminal control functions.
2070
2071Disassembler: Fixed control method invocation issues related to the use
2072of the CondRefOf() operator. The problem is seen in the disassembly where
2073control method invocations may not be disassembled properly if the
2074control method name has been used previously as an argument to CondRefOf.
2075The solution is to not attempt to emit an external declaration for the
2076CondRefOf target (it is not necessary in the first place). This prevents
2077disassembler object type confusion. ACPICA BZ 988.
2078
2079Unix Makefiles: Added an option to disable compiler optimizations and the
2080_FORTIFY_SOURCE flag. Some older compilers have problems compiling ACPICA
2081with optimizations (reportedly, gcc 4.4 for example). This change adds a
2082command line option for make (NOOPT) that disables all compiler
2083optimizations and the _FORTIFY_SOURCE compiler flag. The default
2084optimization is -O2 with the _FORTIFY_SOURCE flag specified. ACPICA BZ
20851034. Lv Zheng, Bob Moore.
2086
2087Tests/ASLTS: Added options to specify individual test cases and modes.
2088This allows testers running aslts.sh to optionally specify individual
2089test modes and test cases. Also added an option to disable the forced
2090generation of the ACPICA tools from source if desired. Lv Zheng.
2091
2092----------------------------------------
209327 September 2013. Summary of changes for version 20130927:
2094
2095This release is available at https://acpica.org/downloads
2096
2097
20981) ACPICA kernel-resident subsystem:
2099
2100Fixed a problem with store operations to reference objects. This change
2101fixes a problem where a Store operation to an ArgX object that contained
2102a
2103reference to a field object did not complete the automatic dereference
2104and
2105then write to the actual field object. Instead, the object type of the
2106field object was inadvertently changed to match the type of the source
2107operand. The new behavior will actually write to the field object (buffer
2108field or field unit), thus matching the correct ACPI-defined behavior.
2109
2110Implemented support to allow the host to redefine individual OSL
2111prototypes. This change enables the host to redefine OSL prototypes found
2112in the acpiosxf.h file. This allows the host to implement OSL interfaces
2113with a macro or inlined function. Further, it allows the host to add any
2114additional required modifiers such as __iomem, __init, __exit, etc., as
2115necessary on a per-interface basis. Enables maximum flexibility for the
2116OSL interfaces. Lv Zheng.
2117
2118Hardcoded the access width for the FADT-defined reset register. The ACPI
2119specification requires the reset register width to be 8 bits. ACPICA now
2120hardcodes the width to 8 and ignores the FADT width value. This provides
2121compatibility with other ACPI implementations that have allowed BIOS code
2122with bad register width values to go unnoticed. Matthew Garett, Bob
2123Moore,
2124Lv Zheng.
2125
2126Changed the position/use of the ACPI_PRINTF_LIKE macro. This macro is
2127used
2128in the OSL header (acpiosxf). The change modifies the position of this
2129macro in each instance where it is used (AcpiDebugPrint, etc.) to avoid
2130build issues if the OSL defines the implementation of the interface to be
2131an inline stub function. Lv Zheng.
2132
2133Deployed a new macro ACPI_EXPORT_SYMBOL_INIT for the main ACPICA
2134initialization interfaces. This change adds a new macro for the main init
2135and terminate external interfaces in order to support hosts that require
2136additional or different processing for these functions. Changed from
2137ACPI_EXPORT_SYMBOL to ACPI_EXPORT_SYMBOL_INIT for these functions. Lv
2138Zheng, Bob Moore.
2139
2140Cleaned up the memory allocation macros for configurability. In the
2141common
2142case, the ACPI_ALLOCATE and related macros now resolve directly to their
2143respective AcpiOs* OSL interfaces. Two options:
21441) The ACPI_ALLOCATE_ZEROED macro uses a simple local implementation by
2145default, unless overridden by the USE_NATIVE_ALLOCATE_ZEROED define.
21462) For AcpiExec (and for debugging), the macros can optionally be
2147resolved
2148to the local ACPICA interfaces that track each allocation (local tracking
2149is used to immediately detect memory leaks).
2150Lv Zheng.
2151
2152Simplified the configuration for ACPI_REDUCED_HARDWARE. Allows the kernel
2153to predefine this macro to either TRUE or FALSE during the system build.
2154
2155Replaced __FUNCTION_ with __func__ in the gcc-specific header.
2156
2157Example Code and Data Size: These are the sizes for the OS-independent
2158acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2159debug version of the code includes the debug output trace mechanism and
2160has a much larger code and data size.
2161
2162  Current Release:
2163    Non-Debug Version:  95.8K Code, 27.0K Data, 122.8K Total
2164    Debug Version:     185.2K Code, 77.2K Data, 262.4K Total
2165  Previous Release:
2166    Non-Debug Version:  96.7K Code, 27.1K Data, 123.9K Total
2167    Debug Version:     184.4K Code, 76.8K Data, 261.2K Total
2168
2169
21702) iASL Compiler/Disassembler and Tools:
2171
2172iASL: Implemented wildcard support for the -e option. This simplifies use
2173when there are many SSDTs that must be included to resolve external
2174method
2175declarations. ACPICA BZ 1041. Example:
2176    iasl -e ssdt*.dat -d dsdt.dat
2177
2178AcpiExec: Add history/line-editing for Unix/Linux systems. This change
2179adds a portable module that implements full history and limited line
2180editing for Unix and Linux systems. It does not use readline() due to
2181portability issues. Instead it uses the POSIX termio interface to put the
2182terminal in raw input mode so that the various special keys can be
2183trapped
2184(such as up/down-arrow for history support and left/right-arrow for line
2185editing). Uses the existing debugger history mechanism. ACPICA BZ 1036.
2186
2187AcpiXtract: Add support to handle (ignore) "empty" lines containing only
2188one or more spaces. This provides compatible with early or different
2189versions of the AcpiDump utility. ACPICA BZ 1044.
2190
2191AcpiDump: Do not ignore tables that contain only an ACPI table header.
2192Apparently, some BIOSs create SSDTs that contain an ACPI table header but
2193no other data. This change adds support to dump these tables. Any tables
2194shorter than the length of an ACPI table header remain in error (an error
2195message is emitted). Reported by Yi Li.
2196
2197Debugger: Echo actual command along with the "unknown command" message.
2198
2199----------------------------------------
220023 August 2013. Summary of changes for version 20130823:
2201
22021) ACPICA kernel-resident subsystem:
2203
2204Implemented support for host-installed System Control Interrupt (SCI)
2205handlers. Certain ACPI functionality requires the host to handle raw
2206SCIs. For example, the "SCI Doorbell" that is defined for memory power
2207state support requires the host device driver to handle SCIs to examine
2208if the doorbell has been activated. Multiple SCI handlers can be
2209installed to allow for future expansion. New external interfaces are
2210AcpiInstallSciHandler, AcpiRemoveSciHandler; see the ACPICA reference for
2211details. Lv Zheng, Bob Moore. ACPICA BZ 1032.
2212
2213Operation region support: Never locally free the handler "context"
2214pointer. This change removes some dangerous code that attempts to free
2215the handler context pointer in some (rare) circumstances. The owner of
2216the handler owns this pointer and the ACPICA code should never touch it.
2217Although not seen to be an issue in any kernel, it did show up as a
2218problem (fault) under AcpiExec. Also, set the internal storage field for
2219the context pointer to zero when the region is deactivated, simply for
2220sanity. David Box. ACPICA BZ 1039.
2221
2222AcpiRead: On error, do not modify the return value target location. If an
2223error happens in the middle of a split 32/32 64-bit I/O operation, do not
2224modify the target of the return value pointer. Makes the code consistent
2225with the rest of ACPICA. Bjorn Helgaas.
2226
2227Example Code and Data Size: These are the sizes for the OS-independent
2228acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2229debug version of the code includes the debug output trace mechanism and
2230has a much larger code and data size.
2231
2232  Current Release:
2233    Non-Debug Version:  96.7K Code, 27.1K Data, 123.9K Total
2234    Debug Version:     184.4K Code, 76.8K Data, 261.2K Total
2235  Previous Release:
2236    Non-Debug Version:  96.2K Code, 27.1K Data, 123.3K Total
2237    Debug Version:     185.4K Code, 77.1K Data, 262.5K Total
2238
2239
22402) iASL Compiler/Disassembler and Tools:
2241
2242AcpiDump: Implemented several new features and fixed some problems:
22431) Added support to dump the RSDP, RSDT, and XSDT tables.
22442) Added support for multiple table instances (SSDT, UEFI).
22453) Added option to dump "customized" (overridden) tables (-c).
22464) Fixed a problem where some table filenames were improperly
2247constructed.
22485) Improved some error messages, removed some unnecessary messages.
2249
2250iASL: Implemented additional support for disassembly of ACPI tables that
2251contain invocations of external control methods. The -fe<file> option
2252allows the import of a file that specifies the external methods along
2253with the required number of arguments for each -- allowing for the
2254correct disassembly of the table. This is a workaround for a limitation
2255of AML code where the disassembler often cannot determine the number of
2256arguments required for an external control method and generates incorrect
2257ASL code. See the iASL reference for details. ACPICA BZ 1030.
2258
2259Debugger: Implemented a new command (paths) that displays the full
2260pathnames (namepaths) and object types of all objects in the namespace.
2261This is an alternative to the namespace command.
2262
2263Debugger: Implemented a new command (sci) that invokes the SCI dispatch
2264mechanism and any installed handlers.
2265
2266iASL: Fixed a possible segfault for "too many parent prefixes" condition.
2267This can occur if there are too many parent prefixes in a namepath (for
2268example, ^^^^^^PCI0.ECRD). ACPICA BZ 1035.
2269
2270Application OSLs: Set the return value for the PCI read functions. These
2271functions simply return AE_OK, but should set the return value to zero
2272also. This change implements this. ACPICA BZ 1038.
2273
2274Debugger: Prevent possible command line buffer overflow. Increase the
2275size of a couple of the debugger line buffers, and ensure that overflow
2276cannot happen. ACPICA BZ 1037.
2277
2278iASL: Changed to abort immediately on serious errors during the parsing
2279phase. Due to the nature of ASL, there is no point in attempting to
2280compile these types of errors, and they typically end up causing a
2281cascade of hundreds of errors which obscure the original problem.
2282
2283----------------------------------------
228425 July 2013. Summary of changes for version 20130725:
2285
22861) ACPICA kernel-resident subsystem:
2287
2288Fixed a problem with the DerefOf operator where references to FieldUnits
2289and BufferFields incorrectly returned the parent object, not the actual
2290value of the object. After this change, a dereference of a FieldUnit
2291reference results in a read operation on the field to get the value, and
2292likewise, the appropriate BufferField value is extracted from the target
2293buffer.
2294
2295Fixed a problem where the _WAK method could cause a fault under these
2296circumstances: 1) Interpreter slack mode was not enabled, and 2) the _WAK
2297method returned no value. The problem is rarely seen because most kernels
2298run ACPICA in slack mode.
2299
2300For the DerefOf operator, a fatal error now results if an attempt is made
2301to dereference a reference (created by the Index operator) to a NULL
2302package element. Provides compatibility with other ACPI implementations,
2303and this behavior will be added to a future version of the ACPI
2304specification.
2305
2306The ACPI Power Management Timer (defined in the FADT) is now optional.
2307This provides compatibility with other ACPI implementations and will
2308appear in the next version of the ACPI specification. If there is no PM
2309Timer on the platform, AcpiGetTimer returns AE_SUPPORT. An address of
2310zero in the FADT indicates no PM timer.
2311
2312Implemented a new interface for _OSI support, AcpiUpdateInterfaces. This
2313allows the host to globally enable/disable all vendor strings, all
2314feature strings, or both. Intended to be primarily used for debugging
2315purposes only. Lv Zheng.
2316
2317Expose the collected _OSI data to the host via a global variable. This
2318data tracks the highest level vendor ID that has been invoked by the BIOS
2319so that the host (and potentially ACPICA itself) can change behaviors
2320based upon the age of the BIOS.
2321
2322Example Code and Data Size: These are the sizes for the OS-independent
2323acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2324debug version of the code includes the debug output trace mechanism and
2325has a much larger code and data size.
2326
2327  Current Release:
2328    Non-Debug Version:  96.2K Code, 27.1K Data, 123.3K Total
2329    Debug Version:     184.4K Code, 76.8K Data, 261.2K Total
2330  Previous Release:
2331    Non-Debug Version:  95.9K Code, 26.9K Data, 122.8K Total
2332    Debug Version:     184.1K Code, 76.7K Data, 260.8K Total
2333
2334
23352) iASL Compiler/Disassembler and Tools:
2336
2337iASL: Created the following enhancements for the -so option (create
2338offset table):
23391)Add offsets for the last nameseg in each namepath for every supported
2340object type
23412)Add support for Processor, Device, Thermal Zone, and Scope objects
23423)Add the actual AML opcode for the parent object of every supported
2343object type
23444)Add support for the ZERO/ONE/ONES AML opcodes for integer objects
2345
2346Disassembler: Emit all unresolved external symbols in a single block.
2347These are external references to control methods that could not be
2348resolved, and thus, the disassembler had to make a guess at the number of
2349arguments to parse.
2350
2351iASL: The argument to the -T option (create table template) is now
2352optional. If not specified, the default table is a DSDT, typically the
2353most common case.
2354
2355----------------------------------------
235626 June 2013. Summary of changes for version 20130626:
2357
23581) ACPICA kernel-resident subsystem:
2359
2360Fixed an issue with runtime repair of the _CST object. Null or invalid
2361elements were not always removed properly. Lv Zheng.
2362
2363Removed an arbitrary restriction of 256 GPEs per GPE block (such as the
2364FADT-defined GPE0 and GPE1). For GPE0, GPE1, and each GPE Block Device,
2365the maximum number of GPEs is 1016. Use of multiple GPE block devices
2366makes the system-wide number of GPEs essentially unlimited.
2367
2368Example Code and Data Size: These are the sizes for the OS-independent
2369acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2370debug version of the code includes the debug output trace mechanism and
2371has a much larger code and data size.
2372
2373  Current Release:
2374    Non-Debug Version:  95.9K Code, 26.9K Data, 122.8K Total
2375    Debug Version:     184.1K Code, 76.7K Data, 260.8K Total
2376  Previous Release:
2377    Non-Debug Version:  96.0K Code, 27.0K Data, 123.0K Total
2378    Debug Version:     184.1K Code, 76.8K Data, 260.9K Total
2379
2380
23812) iASL Compiler/Disassembler and Tools:
2382
2383Portable AcpiDump: Implemented full support for the Linux and FreeBSD
2384hosts. Now supports Linux, FreeBSD, and Windows.
2385
2386Disassembler: Added some missing types for the HEST and EINJ tables: "Set
2387Error Type With Address", "CMCI", "MCE", and "Flush Cacheline".
2388
2389iASL/Preprocessor: Implemented full support for nested
2390#if/#else/#elif/#endif blocks. Allows arbitrary depth of nested blocks.
2391
2392Disassembler: Expanded maximum output string length to 64K. Was 256 bytes
2393max. The original purpose of this constraint was to limit the amount of
2394debug output. However, the string function in question (UtPrintString) is
2395now used for the disassembler also, where 256 bytes is insufficient.
2396Reported by RehabMan@GitHub.
2397
2398iASL/DataTables: Fixed some problems and issues with compilation of DMAR
2399tables. ACPICA BZ 999. Lv Zheng.
2400
2401iASL: Fixed a couple of error exit issues that could result in a "Could
2402not delete <file>" message during ASL compilation.
2403
2404AcpiDump: Allow "FADT" and "MADT" as valid table signatures, even though
2405the actual signatures for these tables are "FACP" and "APIC",
2406respectively.
2407
2408AcpiDump: Added support for multiple UEFI tables. Only SSDT and UEFI
2409tables are allowed to have multiple instances.
2410
2411----------------------------------------
241217 May 2013. Summary of changes for version 20130517:
2413
24141) ACPICA kernel-resident subsystem:
2415
2416Fixed a regression introduced in version 20130328 for _INI methods. This
2417change fixes a problem introduced in 20130328 where _INI methods are no
2418longer executed properly because of a memory block that was not
2419initialized correctly. ACPICA BZ 1016. Tomasz Nowicki
2420<tomasz.nowicki@linaro.org>.
2421
2422Fixed a possible problem with the new extended sleep registers in the
2423ACPI
24245.0 FADT. Do not use these registers (even if populated) unless the HW-
2425reduced bit is set in the FADT (as per the ACPI specification). ACPICA BZ
24261020. Lv Zheng.
2427
2428Implemented return value repair code for _CST predefined objects: Sort
2429the
2430list and detect/remove invalid entries. ACPICA BZ 890. Lv Zheng.
2431
2432Implemented a debug-only option to disable loading of SSDTs from the
2433RSDT/XSDT during ACPICA initialization. This can be useful for debugging
2434ACPI problems on some machines. Set AcpiGbl_DisableSsdtTableLoad in
2435acglobal.h - ACPICA BZ 1005. Lv Zheng.
2436
2437Fixed some issues in the ACPICA initialization and termination code:
2438Tomasz Nowicki <tomasz.nowicki@linaro.org>
24391) Clear events initialized flag upon event component termination. ACPICA
2440BZ 1013.
24412) Fixed a possible memory leak in GPE init error path. ACPICA BZ 1018.
24423) Delete global lock pending lock during termination. ACPICA BZ 1012.
24434) Clear debug buffer global on termination to prevent possible multiple
2444delete. ACPICA BZ 1010.
2445
2446Standardized all switch() blocks across the entire source base. After
2447many
2448years, different formatting for switch() had crept in. This change makes
2449the formatting of every switch block identical. ACPICA BZ 997. Chao Guan.
2450
2451Split some files to enhance ACPICA modularity and configurability:
24521) Split buffer dump routines into utilities/utbuffer.c
24532) Split internal error message routines into utilities/uterror.c
24543) Split table print utilities into tables/tbprint.c
24554) Split iASL command-line option processing into asloptions.c
2456
2457Makefile enhancements:
24581) Support for all new files above.
24592) Abort make on errors from any subcomponent. Chao Guan.
24603) Add build support for Apple Mac OS X. Liang Qi.
2461
2462Example Code and Data Size: These are the sizes for the OS-independent
2463acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2464debug version of the code includes the debug output trace mechanism and
2465has a much larger code and data size.
2466
2467  Current Release:
2468    Non-Debug Version:  96.0K Code, 27.0K Data, 123.0K Total
2469    Debug Version:     184.1K Code, 76.8K Data, 260.9K Total
2470  Previous Release:
2471    Non-Debug Version:  95.6K Code, 26.8K Data, 122.4K Total
2472    Debug Version:     183.5K Code, 76.6K Data, 260.1K Total
2473
2474
24752) iASL Compiler/Disassembler and Tools:
2476
2477New utility: Implemented an easily portable version of the acpidump
2478utility to extract ACPI tables from the system (or a file) in an ASCII
2479hex
2480dump format. The top-level code implements the various command line
2481options, file I/O, and table dump routines. To port to a new host, only
2482three functions need to be implemented to get tables -- since this
2483functionality is OS-dependent. See the tools/acpidump/apmain.c module and
2484the ACPICA reference for porting instructions. ACPICA BZ 859. Notes:
24851) The Windows version obtains the ACPI tables from the Registry.
24862) The Linux version is under development.
24873) Other hosts - If an OS-dependent module is submitted, it will be
2488distributed with ACPICA.
2489
2490iASL: Fixed a regression for -D preprocessor option (define symbol). A
2491restructuring/change to the initialization sequence caused this option to
2492no longer work properly.
2493
2494iASL: Implemented a mechanism to disable specific warnings and remarks.
2495Adds a new command line option, "-vw <messageid> as well as "#pragma
2496disable <messageid>". ACPICA BZ 989. Chao Guan, Bob Moore.
2497
2498iASL: Fix for too-strict package object validation. The package object
2499validation for return values from the predefined names is a bit too
2500strict, it does not allow names references within the package (which will
2501be resolved at runtime.) These types of references cannot be validated at
2502compile time. This change ignores named references within package objects
2503for names that return or define static packages.
2504
2505Debugger: Fixed the 80-character command line limitation for the History
2506command. Now allows lines of arbitrary length. ACPICA BZ 1000. Chao Guan.
2507
2508iASL: Added control method and package support for the -so option
2509(generates AML offset table for BIOS support.)
2510
2511iASL: issue a remark if a non-serialized method creates named objects. If
2512a thread blocks within the method for any reason, and another thread
2513enters the method, the method will fail because an attempt will be made
2514to
2515create the same (named) object twice. In this case, issue a remark that
2516the method should be marked serialized. NOTE: may become a warning later.
2517ACPICA BZ 909.
2518
2519----------------------------------------
252018 April 2013. Summary of changes for version 20130418:
2521
25221) ACPICA kernel-resident subsystem:
2523
2524Fixed a possible buffer overrun during some rare but specific field unit
2525read operations. This overrun can only happen if the DSDT version is 1 --
2526meaning that all AML integers are 32 bits -- and the field length is
2527between 33 and 55 bits long. During the read, an internal buffer object
2528is
2529created for the field unit because the field is larger than an integer
2530(32
2531bits). However, in this case, the buffer will be incorrectly written
2532beyond the end because the buffer length is less than the internal
2533minimum
2534of 64 bits (8 bytes) long. The buffer will be either 5, 6, or 7 bytes
2535long, but a full 8 bytes will be written.
2536
2537Updated the Embedded Controller "orphan" _REG method support. This refers
2538to _REG methods under the EC device that have no corresponding operation
2539region. This is allowed by the ACPI specification. This update removes a
2540dependency on the existence an ECDT table. It will execute an orphan _REG
2541method as long as the operation region handler for the EC is installed at
2542the EC device node and not the namespace root. Rui Zhang (original
2543update), Bob Moore (update/integrate).
2544
2545Implemented run-time argument typechecking for all predefined ACPI names
2546(_STA, _BIF, etc.) This change performs object typechecking on all
2547incoming arguments for all predefined names executed via
2548AcpiEvaluateObject. This ensures that ACPI-related device drivers are
2549passing correct object types as well as the correct number of arguments
2550(therefore identifying any issues immediately). Also, the ASL/namespace
2551definition of the predefined name is checked against the ACPI
2552specification for the proper argument count. Adds one new file,
2553nsarguments.c
2554
2555Changed an exception code for the ASL UnLoad() operator. Changed the
2556exception code for the case where the input DdbHandle is invalid, from
2557AE_BAD_PARAMETER to the more appropriate AE_AML_OPERAND_TYPE.
2558
2559Unix/Linux makefiles: Removed the use of the -O2 optimization flag in the
2560global makefile. The use of this flag causes compiler errors on earlier
2561versions of GCC, so it has been removed for compatibility.
2562
2563Miscellaneous cleanup:
25641) Removed some unused/obsolete macros
25652) Fixed a possible memory leak in the _OSI support
25663) Removed an unused variable in the predefined name support
25674) Windows OSL: remove obsolete reference to a memory list field
2568
2569Example Code and Data Size: These are the sizes for the OS-independent
2570acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2571debug version of the code includes the debug output trace mechanism and
2572has a much larger code and data size.
2573
2574  Current Release:
2575    Non-Debug Version:  95.2K Code, 26.4K Data, 121.6K Total
2576    Debug Version:     183.0K Code, 76.0K Data, 259.0K Total
2577  Previous Release:
2578    Non-Debug Version:  95.6K Code, 26.8K Data, 122.4K Total
2579    Debug Version:     183.5K Code, 76.6K Data, 260.1K Total
2580
2581
25822) iASL Compiler/Disassembler and Tools:
2583
2584AcpiExec: Added installation of a handler for the SystemCMOS address
2585space. This prevents control method abort if a method accesses this
2586space.
2587
2588AcpiExec: Added support for multiple EC devices, and now install EC
2589operation region handler(s) at the actual EC device instead of the
2590namespace root. This reflects the typical behavior of host operating
2591systems.
2592
2593AcpiExec: Updated to ensure that all operation region handlers are
2594installed before the _REG methods are executed. This prevents a _REG
2595method from aborting if it accesses an address space has no handler.
2596AcpiExec installs a handler for every possible address space.
2597
2598Debugger: Enhanced the "handlers" command to display non-root handlers.
2599This change enhances the handlers command to display handlers associated
2600with individual devices throughout the namespace, in addition to the
2601currently supported display of handlers associated with the root
2602namespace
2603node.
2604
2605ASL Test Suite: Several test suite errors have been identified and
2606resolved, reducing the total error count during execution. Chao Guan.
2607
2608----------------------------------------
260928 March 2013. Summary of changes for version 20130328:
2610
26111) ACPICA kernel-resident subsystem:
2612
2613Fixed several possible race conditions with the internal object reference
2614counting mechanism. Some of the external ACPICA interfaces update object
2615reference counts without holding the interpreter or namespace lock. This
2616change adds a spinlock to protect reference count updates on the internal
2617ACPICA objects. Reported by and with assistance from Andriy Gapon
2618(avg@FreeBSD.org).
2619
2620FADT support: Removed an extraneous warning for very large GPE register
2621sets. This change removes a size mismatch warning if the legacy length
2622field for a GPE register set is larger than the 64-bit GAS structure can
2623accommodate. GPE register sets can be larger than the 255-bit width
2624limitation of the GAS structure. Linn Crosetto (linn@hp.com).
2625
2626_OSI Support: handle any errors from AcpiOsAcquireMutex. Check for error
2627return from this interface. Handles a possible timeout case if
2628ACPI_WAIT_FOREVER is modified by the host to be a value less than
2629"forever". Jung-uk Kim.
2630
2631Predefined name support: Add allowed/required argument type information
2632to
2633the master predefined info table. This change adds the infrastructure to
2634enable typechecking on incoming arguments for all predefined
2635methods/objects. It does not actually contain the code that will fully
2636utilize this information, this is still under development. Also condenses
2637some duplicate code for the predefined names into a new module,
2638utilities/utpredef.c
2639
2640Example Code and Data Size: These are the sizes for the OS-independent
2641acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2642debug version of the code includes the debug output trace mechanism and
2643has a much larger code and data size.
2644
2645  Previous Release:
2646    Non-Debug Version:  95.0K Code, 25.9K Data, 120.9K Total
2647    Debug Version:     182.9K Code, 75.6K Data, 258.5K Total
2648  Current Release:
2649    Non-Debug Version:  95.2K Code, 26.4K Data, 121.6K Total
2650    Debug Version:     183.0K Code, 76.0K Data, 259.0K Total
2651
2652
26532) iASL Compiler/Disassembler and Tools:
2654
2655iASL: Implemented a new option to simplify the development of ACPI-
2656related
2657BIOS code. Adds support for a new "offset table" output file. The -so
2658option will create a C table containing the AML table offsets of various
2659named objects in the namespace so that BIOS code can modify them easily
2660at
2661boot time. This can simplify BIOS runtime code by eliminating expensive
2662searches for "magic values", enhancing boot times and adding greater
2663reliability. With assistance from Lee Hamel.
2664
2665iASL: Allow additional predefined names to return zero-length packages.
2666Now, all predefined names that are defined by the ACPI specification to
2667return a "variable-length package of packages" are allowed to return a
2668zero length top-level package. This allows the BIOS to tell the host that
2669the requested feature is not supported, and supports existing BIOS/ASL
2670code and practices.
2671
2672iASL: Changed the "result not used" warning to an error. This is the case
2673where an ASL operator is effectively a NOOP because the result of the
2674operation is not stored anywhere. For example:
2675    Add (4, Local0)
2676There is no target (missing 3rd argument), nor is the function return
2677value used. This is potentially a very serious problem -- since the code
2678was probably intended to do something, but for whatever reason, the value
2679was not stored. Therefore, this issue has been upgraded from a warning to
2680an error.
2681
2682AcpiHelp: Added allowable/required argument types to the predefined names
2683info display. This feature utilizes the recent update to the predefined
2684names table (above).
2685
2686----------------------------------------
268714 February 2013. Summary of changes for version 20130214:
2688
26891) ACPICA Kernel-resident Subsystem:
2690
2691Fixed a possible regression on some hosts: Reinstated the safe return
2692macros (return_ACPI_STATUS, etc.) that ensure that the argument is
2693evaluated only once. Although these macros are not needed for the ACPICA
2694code itself, they are often used by ACPI-related host device drivers
2695where
2696the safe feature may be necessary.
2697
2698Fixed several issues related to the ACPI 5.0 reduced hardware support
2699(SOC): Now ensure that if the platform declares itself as hardware-
2700reduced
2701via the FADT, the following functions become NOOPs (and always return
2702AE_OK) because ACPI is always enabled by definition on these machines:
2703  AcpiEnable
2704  AcpiDisable
2705  AcpiHwGetMode
2706  AcpiHwSetMode
2707
2708Dynamic Object Repair: Implemented additional runtime repairs for
2709predefined name return values. Both of these repairs can simplify code in
2710the related device drivers that invoke these methods:
27111) For the _STR and _MLS names, automatically repair/convert an ASCII
2712string to a Unicode buffer.
27132) For the _CRS, _PRS, and _DMA names, return a resource descriptor with
2714a
2715lone end tag descriptor in the following cases: A Return(0) was executed,
2716a null buffer was returned, or no object at all was returned (non-slack
2717mode only). Adds a new file, nsconvert.c
2718ACPICA BZ 998. Bob Moore, Lv Zheng.
2719
2720Resource Manager: Added additional code to prevent possible infinite
2721loops
2722while traversing corrupted or ill-formed resource template buffers. Check
2723for zero-length resource descriptors in all code that loops through
2724resource templates (the length field is used to index through the
2725template). This change also hardens the external AcpiWalkResources and
2726AcpiWalkResourceBuffer interfaces.
2727
2728Local Cache Manager: Enhanced the main data structure to eliminate an
2729unnecessary mechanism to access the next object in the list. Actually
2730provides a small performance enhancement for hosts that use the local
2731ACPICA cache manager. Jung-uk Kim.
2732
2733Example Code and Data Size: These are the sizes for the OS-independent
2734acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2735debug version of the code includes the debug output trace mechanism and
2736has a much larger code and data size.
2737
2738  Previous Release:
2739    Non-Debug Version:  94.5K Code, 25.4K Data, 119.9K Total
2740    Debug Version:     182.3K Code, 75.0K Data, 257.3K Total
2741  Current Release:
2742    Non-Debug Version:  95.0K Code, 25.9K Data, 120.9K Total
2743    Debug Version:     182.9K Code, 75.6K Data, 258.5K Total
2744
2745
27462) iASL Compiler/Disassembler and Tools:
2747
2748iASL/Disassembler: Fixed several issues with the definition of the ACPI
27495.0 RASF table (RAS Feature Table). This change incorporates late changes
2750that were made to the ACPI 5.0 specification.
2751
2752iASL/Disassembler: Added full support for the following new ACPI tables:
2753  1) The MTMR table (MID Timer Table)
2754  2) The VRTC table (Virtual Real Time Clock Table).
2755Includes header file, disassembler, table compiler, and template support
2756for both tables.
2757
2758iASL: Implemented compile-time validation of package objects returned by
2759predefined names. This new feature validates static package objects
2760returned by the various predefined names defined to return packages. Both
2761object types and package lengths are validated, for both parent packages
2762and sub-packages, if any. The code is similar in structure and behavior
2763to
2764the runtime repair mechanism within the AML interpreter and uses the
2765existing predefined name information table. Adds a new file, aslprepkg.c.
2766ACPICA BZ 938.
2767
2768iASL: Implemented auto-detection of binary ACPI tables for disassembly.
2769This feature detects a binary file with a valid ACPI table header and
2770invokes the disassembler automatically. Eliminates the need to
2771specifically invoke the disassembler with the -d option. ACPICA BZ 862.
2772
2773iASL/Disassembler: Added several warnings for the case where there are
2774unresolved control methods during the disassembly. This can potentially
2775cause errors when the output file is compiled, because the disassembler
2776assumes zero method arguments in these cases (it cannot determine the
2777actual number of arguments without resolution/definition of the method).
2778
2779Debugger: Added support to display all resources with a single command.
2780Invocation of the resources command with no arguments will now display
2781all
2782resources within the current namespace.
2783
2784AcpiHelp: Added descriptive text for each ACPICA exception code displayed
2785via the -e option.
2786
2787----------------------------------------
278817 January 2013. Summary of changes for version 20130117:
2789
27901) ACPICA Kernel-resident Subsystem:
2791
2792Updated the AcpiGetSleepTypeData interface: Allow the \_Sx methods to
2793return either 1 or 2 integers. Although the ACPI spec defines the \_Sx
2794objects to return a package containing one integer, most BIOS code
2795returns
2796two integers and the previous code reflects that. However, we also need
2797to
2798support BIOS code that actually implements to the ACPI spec, and this
2799change reflects this.
2800
2801Fixed two issues with the ACPI_DEBUG_PRINT macros:
28021) Added the ACPI_DO_WHILE macro to the main DEBUG_PRINT helper macro for
2803C compilers that require this support.
28042) Renamed the internal ACPI_DEBUG macro to ACPI_DO_DEBUG_PRINT since
2805ACPI_DEBUG is already used by many of the various hosts.
2806
2807Updated all ACPICA copyrights and signons to 2013. Added the 2013
2808copyright to all module headers and signons, including the standard Linux
2809header. This affects virtually every file in the ACPICA core subsystem,
2810iASL compiler, all ACPICA utilities, and the test suites.
2811
2812Example Code and Data Size: These are the sizes for the OS-independent
2813acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2814debug version of the code includes the debug output trace mechanism and
2815has a much larger code and data size.
2816
2817  Previous Release:
2818    Non-Debug Version:  94.5K Code, 25.5K Data, 120.0K Total
2819    Debug Version:     182.2K Code, 74.9K Data, 257.1K Total
2820  Current Release:
2821    Non-Debug Version:  94.5K Code, 25.4K Data, 119.9K Total
2822    Debug Version:     182.3K Code, 75.0K Data, 257.3K Total
2823
2824
28252) iASL Compiler/Disassembler and Tools:
2826
2827Generic Unix OSL: Use a buffer to eliminate multiple vfprintf()s and
2828prevent a possible fault on some hosts. Some C libraries modify the arg
2829pointer parameter to vfprintf making it difficult to call it twice in the
2830AcpiOsVprintf function. Use a local buffer to workaround this issue. This
2831does not affect the Windows OSL since the Win C library does not modify
2832the arg pointer. Chao Guan, Bob Moore.
2833
2834iASL: Fixed a possible infinite loop when the maximum error count is
2835reached. If an output file other than the .AML file is specified (such as
2836a listing file), and the maximum number of errors is reached, do not
2837attempt to flush data to the output file(s) as the compiler is aborting.
2838This can cause an infinite loop as the max error count code essentially
2839keeps calling itself.
2840
2841iASL/Disassembler: Added an option (-in) to ignore NOOP
2842opcodes/operators.
2843Implemented for both the compiler and the disassembler. Often, the NOOP
2844opcode is used as padding for packages that are changed dynamically by
2845the
2846BIOS. When disassembled and recompiled, these NOOPs will cause syntax
2847errors. This option causes the disassembler to ignore all NOOP opcodes
2848(0xA3), and it also causes the compiler to ignore all ASL source code
2849NOOP
2850statements as well.
2851
2852Debugger: Enhanced the Sleep command to execute all sleep states. This
2853change allows Sleep to be invoked with no arguments and causes the
2854debugger to execute all of the sleep states, 0-5, automatically.
2855
2856----------------------------------------
285720 December 2012. Summary of changes for version 20121220:
2858
28591) ACPICA Kernel-resident Subsystem:
2860
2861Implemented a new interface, AcpiWalkResourceBuffer. This interface is an
2862alternate entry point for AcpiWalkResources and improves the usability of
2863the resource manager by accepting as input a buffer containing the output
2864of either a _CRS, _PRS, or _AEI method. The key functionality is that the
2865input buffer is not deleted by this interface so that it can be used by
2866the host later. See the ACPICA reference for details.
2867
2868Interpreter: Add a warning if a 64-bit constant appears in a 32-bit table
2869(DSDT version < 2). The constant will be truncated and this warning
2870reflects that behavior.
2871
2872Resource Manager: Add support for the new ACPI 5.0 wake bit in the IRQ,
2873ExtendedInterrupt, and GpioInt descriptors. This change adds support to
2874both get and set the new wake bit in these descriptors, separately from
2875the existing share bit. Reported by Aaron Lu.
2876
2877Interpreter: Fix Store() when an implicit conversion is not possible. For
2878example, in the cases such as a store of a string to an existing package
2879object, implement the store as a CopyObject(). This is a small departure
2880from the ACPI specification which states that the control method should
2881be
2882aborted in this case. However, the ASLTS suite depends on this behavior.
2883
2884Performance improvement for the various FUNCTION_TRACE and DEBUG_PRINT
2885macros: check if debug output is currently enabled as soon as possible to
2886minimize performance impact if debug is in fact not enabled.
2887
2888Source code restructuring: Cleanup to improve modularity. The following
2889new files have been added: dbconvert.c, evhandler.c, nsprepkg.c,
2890psopinfo.c, psobject.c, rsdumpinfo.c, utstring.c, and utownerid.c.
2891Associated makefiles and project files have been updated.
2892
2893Changed an exception code for LoadTable operator. For the case where one
2894of the input strings is too long, change the returned exception code from
2895AE_BAD_PARAMETER to AE_AML_STRING_LIMIT.
2896
2897Fixed a possible memory leak in dispatcher error path. On error, delete
2898the mutex object created during method mutex creation. Reported by
2899tim.gardner@canonical.com.
2900
2901Example Code and Data Size: These are the sizes for the OS-independent
2902acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2903debug version of the code includes the debug output trace mechanism and
2904has a much larger code and data size.
2905
2906  Previous Release:
2907    Non-Debug Version:  94.3K Code, 25.3K Data, 119.6K Total
2908    Debug Version:     175.5K Code, 74.5K Data, 250.0K Total
2909  Current Release:
2910    Non-Debug Version:  94.5K Code, 25.5K Data, 120.0K Total
2911    Debug Version:     182.2K Code, 74.9K Data, 257.1K Total
2912
2913
29142) iASL Compiler/Disassembler and Tools:
2915
2916iASL: Disallow a method call as argument to the ObjectType ASL operator.
2917This change tracks an errata to the ACPI 5.0 document. The AML grammar
2918will not allow the interpreter to differentiate between a method and a
2919method invocation when these are used as an argument to the ObjectType
2920operator. The ACPI specification change is to disallow a method
2921invocation
2922(UserTerm) for the ObjectType operator.
2923
2924Finish support for the TPM2 and CSRT tables in the headers, table
2925compiler, and disassembler.
2926
2927Unix user-space OSL: Fix a problem with WaitSemaphore where the timeout
2928always expires immediately if the semaphore is not available. The
2929original
2930code was using a relative-time timeout, but sem_timedwait requires the
2931use
2932of an absolute time.
2933
2934iASL: Added a remark if the Timer() operator is used within a 32-bit
2935table. This operator returns a 64-bit time value that will be truncated
2936within a 32-bit table.
2937
2938iASL Source code restructuring: Cleanup to improve modularity. The
2939following new files have been added: aslhex.c, aslxref.c, aslnamesp.c,
2940aslmethod.c, and aslfileio.c. Associated makefiles and project files have
2941been updated.
2942
2943
2944----------------------------------------
294514 November 2012. Summary of changes for version 20121114:
2946
29471) ACPICA Kernel-resident Subsystem:
2948
2949Implemented a performance enhancement for ACPI/AML Package objects. This
2950change greatly increases the performance of Package objects within the
2951interpreter. It changes the processing of reference counts for packages
2952by
2953optimizing for the most common case where the package sub-objects are
2954either Integers, Strings, or Buffers. Increases the overall performance
2955of
2956the ASLTS test suite by 1.5X (Increases the Slack Mode performance by
29572X.)
2958Chao Guan. ACPICA BZ 943.
2959
2960Implemented and deployed common macros to extract flag bits from resource
2961descriptors. Improves readability and maintainability of the code. Fixes
2962a
2963problem with the UART serial bus descriptor for the number of data bits
2964flags (was incorrectly 2 bits, should be 3).
2965
2966Enhanced the ACPI_GETx and ACPI_SETx macros. Improved the implementation
2967of the macros and changed the SETx macros to the style of (destination,
2968source). Also added ACPI_CASTx companion macros. Lv Zheng.
2969
2970Example Code and Data Size: These are the sizes for the OS-independent
2971acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2972debug version of the code includes the debug output trace mechanism and
2973has a much larger code and data size.
2974
2975  Previous Release:
2976    Non-Debug Version:  93.9K Code, 25.2K Data, 119.1K Total
2977    Debug Version:     175.5K Code, 74.5K Data, 250.0K Total
2978  Current Release:
2979    Non-Debug Version:  94.3K Code, 25.3K Data, 119.6K Total
2980    Debug Version:     175.5K Code, 74.5K Data, 250.0K Total
2981
2982
29832) iASL Compiler/Disassembler and Tools:
2984
2985Disassembler: Added the new ACPI 5.0 interrupt sharing flags. This change
2986adds the ShareAndWake and ExclusiveAndWake flags which were added to the
2987Irq, Interrupt, and Gpio resource descriptors in ACPI 5.0. ACPICA BZ 986.
2988
2989Disassembler: Fixed a problem with external declaration generation. Fixes
2990a problem where an incorrect pathname could be generated for an external
2991declaration if the original reference to the object includes leading
2992carats (^). ACPICA BZ 984.
2993
2994Debugger: Completed a major update for the Disassemble<method> command.
2995This command was out-of-date and did not properly disassemble control
2996methods that had any reasonable complexity. This fix brings the command
2997up
2998to the same level as the rest of the disassembler. Adds one new file,
2999dmdeferred.c, which is existing code that is now common with the main
3000disassembler and the debugger disassemble command. ACPICA MZ 978.
3001
3002iASL: Moved the parser entry prototype to avoid a duplicate declaration.
3003Newer versions of Bison emit this prototype, so moved the prototype out
3004of
3005the iASL header to where it is actually used in order to avoid a
3006duplicate
3007declaration.
3008
3009iASL/Tools: Standardized use of the stream I/O functions:
3010  1) Ensure check for I/O error after every fopen/fread/fwrite
3011  2) Ensure proper order of size/count arguments for fread/fwrite
3012  3) Use test of (Actual != Requested) after all fwrite, and most fread
3013  4) Standardize I/O error messages
3014Improves reliability and maintainability of the code. Bob Moore, Lv
3015Zheng.
3016ACPICA BZ 981.
3017
3018Disassembler: Prevent duplicate External() statements. During generation
3019of external statements, detect similar pathnames that are actually
3020duplicates such as these:
3021  External (\ABCD)
3022  External (ABCD)
3023Remove all leading '\' characters from pathnames during the external
3024statement generation so that duplicates will be detected and tossed.
3025ACPICA BZ 985.
3026
3027Tools: Replace low-level I/O with stream I/O functions. Replace
3028open/read/write/close with the stream I/O equivalents
3029fopen/fread/fwrite/fclose for portability and performance. Lv Zheng, Bob
3030Moore.
3031
3032AcpiBin: Fix for the dump-to-hex function. Now correctly output the table
3033name header so that AcpiXtract recognizes the output file/table.
3034
3035iASL: Remove obsolete -2 option flag. Originally intended to force the
3036compiler/disassembler into an ACPI 2.0 mode, this was never implemented
3037and the entire concept is now obsolete.
3038
3039----------------------------------------
304018 October 2012. Summary of changes for version 20121018:
3041
3042
30431) ACPICA Kernel-resident Subsystem:
3044
3045Updated support for the ACPI 5.0 MPST table. Fixes some problems
3046introduced by late changes to the table as it was added to the ACPI 5.0
3047specification. Includes header, disassembler, and data table compiler
3048support as well as a new version of the MPST template.
3049
3050AcpiGetObjectInfo: Enhanced the device object support to include the ACPI
30515.0 _SUB method. Now calls _SUB in addition to the other PNP-related ID
3052methods: _HID, _CID, and _UID.
3053
3054Changed ACPI_DEVICE_ID to ACPI_PNP_DEVICE_ID. Also changed
3055ACPI_DEVICE_ID_LIST to ACPI_PNP_DEVICE_ID_LIST. These changes prevent
3056name collisions on hosts that reserve the *_DEVICE_ID (or *DeviceId)
3057names for their various drivers. Affects the AcpiGetObjectInfo external
3058interface, and other internal interfaces as well.
3059
3060Added and deployed a new macro for ACPI_NAME management: ACPI_MOVE_NAME.
3061This macro resolves to a simple 32-bit move of the 4-character ACPI_NAME
3062on machines that support non-aligned transfers. Optimizes for this case
3063rather than using a strncpy. With assistance from Zheng Lv.
3064
3065Resource Manager: Small fix for buffer size calculation. Fixed a one byte
3066error in the output buffer calculation. Feng Tang. ACPICA BZ 849.
3067
3068Added a new debug print message for AML mutex objects that are force-
3069released. At control method termination, any currently acquired mutex
3070objects are force-released. Adds a new debug-only message for each one
3071that is released.
3072
3073Audited/updated all ACPICA return macros and the function debug depth
3074counter: 1) Ensure that all functions that use the various TRACE macros
3075also use the appropriate ACPICA return macros. 2) Ensure that all normal
3076return statements surround the return expression (value) with parens to
3077ensure consistency across the ACPICA code base. Guan Chao, Tang Feng,
3078Zheng Lv, Bob Moore. ACPICA Bugzilla 972.
3079
3080Global source code changes/maintenance: All extra lines at the start and
3081end of each source file have been removed for consistency. Also, within
3082comments, all new sentences start with a single space instead of a double
3083space, again for consistency across the code base.
3084
3085Example Code and Data Size: These are the sizes for the OS-independent
3086acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3087debug version of the code includes the debug output trace mechanism and
3088has a much larger code and data size.
3089
3090  Previous Release:
3091    Non-Debug Version:  93.7K Code, 25.3K Data, 119.0K Total
3092    Debug Version:     175.0K Code, 74.4K Data, 249.4K Total
3093  Current Release:
3094    Non-Debug Version:  93.9K Code, 25.2K Data, 119.1K Total
3095    Debug Version:     175.5K Code, 74.5K Data, 250.0K Total
3096
3097
30982) iASL Compiler/Disassembler and Tools:
3099
3100AcpiExec: Improved the algorithm used for memory leak/corruption
3101detection. Added some intelligence to the code that maintains the global
3102list of allocated memory. The list is now ordered by allocated memory
3103address, significantly improving performance. When running AcpiExec on
3104the ASLTS test suite, speed improvements of 3X to 5X are seen, depending
3105on the platform and/or the environment. Note, this performance
3106enhancement affects the AcpiExec utility only, not the kernel-resident
3107ACPICA code.
3108
3109Enhanced error reporting for invalid AML opcodes and bad ACPI_NAMEs. For
3110the disassembler, dump the 48 bytes surrounding the invalid opcode. Fix
3111incorrect table offset reported for invalid opcodes. Report the original
311232-bit value for bad ACPI_NAMEs (as well as the repaired name.)
3113
3114Disassembler: Enhanced the -vt option to emit the binary table data in
3115hex format to assist with debugging.
3116
3117Fixed a potential filename buffer overflow in osunixdir.c. Increased the
3118size of file structure. Colin Ian King.
3119
3120----------------------------------------
312113 September 2012. Summary of changes for version 20120913:
3122
3123
31241) ACPICA Kernel-resident Subsystem:
3125
3126ACPI 5.0: Added two new notify types for the Hardware Error Notification
3127Structure within the Hardware Error Source Table (HEST) table -- CMCI(5)
3128and
3129MCE(6).
3130
3131Table Manager: Merged/removed duplicate code in the root table resize
3132functions. One function is external, the other is internal. Lv Zheng,
3133ACPICA
3134BZ 846.
3135
3136Makefiles: Completely removed the obsolete "Linux" makefiles under
3137acpica/generate/linux. These makefiles are obsolete and have been
3138replaced
3139by
3140the generic unix makefiles under acpica/generate/unix.
3141
3142Makefiles: Ensure that binary files always copied properly. Minor rule
3143change
3144to ensure that the final binary output files are always copied up to the
3145appropriate binary directory (bin32 or bin64.)
3146
3147Example Code and Data Size: These are the sizes for the OS-independent
3148acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3149debug
3150version of the code includes the debug output trace mechanism and has a
3151much
3152larger code and data size.
3153
3154  Previous Release:
3155    Non-Debug Version:  93.8K Code, 25.3K Data, 119.1K Total
3156    Debug Version:     175.7K Code, 74.8K Data, 250.5K Total
3157  Current Release:
3158    Non-Debug Version:  93.7K Code, 25.3K Data, 119.0K Total
3159    Debug Version:     175.0K Code, 74.4K Data, 249.4K Total
3160
3161
31622) iASL Compiler/Disassembler and Tools:
3163
3164Disassembler: Fixed a possible fault during the disassembly of resource
3165descriptors when a second parse is required because of the invocation of
3166external control methods within the table. With assistance from
3167adq@lidskialf.net. ACPICA BZ 976.
3168
3169iASL: Fixed a namepath optimization problem. An error can occur if the
3170parse
3171node that contains the namepath to be optimized does not have a parent
3172node
3173that is a named object. This change fixes the problem.
3174
3175iASL: Fixed a regression where the AML file is not deleted on errors. The
3176AML
3177output file should be deleted if there are any errors during the
3178compiler.
3179The
3180only exception is if the -f (force output) option is used. ACPICA BZ 974.
3181
3182iASL: Added a feature to automatically increase internal line buffer
3183sizes.
3184Via realloc(), automatically increase the internal line buffer sizes as
3185necessary to support very long source code lines. The current version of
3186the
3187preprocessor requires a buffer long enough to contain full source code
3188lines.
3189This change increases the line buffer(s) if the input lines go beyond the
3190current buffer size. This eliminates errors that occurred when a source
3191code
3192line was longer than the buffer.
3193
3194iASL: Fixed a problem with constant folding in method declarations. The
3195SyncLevel term is a ByteConstExpr, and incorrect code would be generated
3196if a
3197Type3 opcode was used.
3198
3199Debugger: Improved command help support. For incorrect argument count,
3200display
3201full help for the command. For help command itself, allow an argument to
3202specify a command.
3203
3204Test Suites: Several bug fixes for the ASLTS suite reduces the number of
3205errors during execution of the suite. Guan Chao.
3206
3207----------------------------------------
320816 August 2012. Summary of changes for version 20120816:
3209
3210
32111) ACPICA Kernel-resident Subsystem:
3212
3213Removed all use of the deprecated _GTS and _BFS predefined methods. The
3214_GTS
3215(Going To Sleep) and _BFS (Back From Sleep) methods are essentially
3216deprecated and will probably be removed from the ACPI specification.
3217Windows
3218does not invoke them, and reportedly never will. The final nail in the
3219coffin
3220is that the ACPI specification states that these methods must be run with
3221interrupts off, which is not going to happen in a kernel interpreter.
3222Note:
3223Linux has removed all use of the methods also. It was discovered that
3224invoking these functions caused failures on some machines, probably
3225because
3226they were never tested since Windows does not call them. Affects two
3227external
3228interfaces, AcpiEnterSleepState and AcpiLeaveSleepStatePrep. Tang Feng.
3229ACPICA BZ 969.
3230
3231Implemented support for complex bit-packed buffers returned from the _PLD
3232(Physical Location of Device) predefined method. Adds a new external
3233interface, AcpiDecodePldBuffer that parses the buffer into a more usable
3234C
3235structure. Note: C Bitfields cannot be used for this type of predefined
3236structure since the memory layout of individual bitfields is not defined
3237by
3238the C language. In addition, there are endian concerns where a compiler
3239will
3240change the bitfield ordering based on the machine type. The new ACPICA
3241interface eliminates these issues, and should be called after _PLD is
3242executed. ACPICA BZ 954.
3243
3244Implemented a change to allow a scope change to root (via "Scope (\)")
3245during
3246execution of module-level ASL code (code that is executed at table load
3247time.) Lin Ming.
3248
3249Added the Windows8/Server2012 string for the _OSI method. This change
3250adds
3251a
3252new _OSI string, "Windows 2012" for both Windows 8 and Windows Server
32532012.
3254
3255Added header support for the new ACPI tables DBG2 (Debug Port Table Type
32562)
3257and CSRT (Core System Resource Table).
3258
3259Added struct header support for the _FDE, _GRT, _GTM, and _SRT predefined
3260names. This simplifies access to the buffers returned by these predefined
3261names. Adds a new file, include/acbuffer.h. ACPICA BZ 956.
3262
3263GPE support: Removed an extraneous parameter from the various low-level
3264internal GPE functions. Tang Feng.
3265
3266Removed the linux makefiles from the unix packages. The generate/linux
3267makefiles are obsolete and have been removed from the unix tarball
3268release
3269packages. The replacement makefiles are under generate/unix, and there is
3270a
3271top-level makefile under the main acpica directory. ACPICA BZ 967, 912.
3272
3273Updates for Unix makefiles:
32741) Add -D_FORTIFY_SOURCE=2 for gcc generation. Arjan van de Ven.
32752) Update linker flags (move to end of command line) for AcpiExec
3276utility.
3277Guan Chao.
3278
3279Split ACPICA initialization functions to new file, utxfinit.c. Split from
3280utxface.c to improve modularity and reduce file size.
3281
3282Example Code and Data Size: These are the sizes for the OS-independent
3283acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3284debug version of the code includes the debug output trace mechanism and
3285has a
3286much larger code and data size.
3287
3288  Previous Release:
3289    Non-Debug Version:  93.5K Code, 25.3K Data, 118.8K Total
3290    Debug Version:     173.7K Code, 74.0K Data, 247.7K Total
3291  Current Release:
3292    Non-Debug Version:  93.8K Code, 25.3K Data, 119.1K Total
3293    Debug Version:     175.7K Code, 74.8K Data, 250.5K Total
3294
3295
32962) iASL Compiler/Disassembler and Tools:
3297
3298iASL: Fixed a problem with constant folding for fixed-length constant
3299expressions. The constant-folding code was not being invoked for constant
3300expressions that allow the use of type 3/4/5 opcodes to generate
3301constants
3302for expressions such as ByteConstExpr, WordConstExpr, etc. This could
3303result
3304in the generation of invalid AML bytecode. ACPICA BZ 970.
3305
3306iASL: Fixed a generation issue on newer versions of Bison. Newer versions
3307apparently automatically emit some of the necessary externals. This
3308change
3309handles these versions in order to eliminate generation warnings.
3310
3311Disassembler: Added support to decode the DBG2 and CSRT ACPI tables.
3312
3313Disassembler: Add support to decode _PLD buffers. The decoded buffer
3314appears
3315within comments in the output file.
3316
3317Debugger: Fixed a regression with the "Threads" command where
3318AE_BAD_PARAMETER was always returned.
3319
3320----------------------------------------
332111 July 2012. Summary of changes for version 20120711:
3322
33231) ACPICA Kernel-resident Subsystem:
3324
3325Fixed a possible fault in the return package object repair code. Fixes a
3326problem that can occur when a lone package object is wrapped with an
3327outer
3328package object in order to force conformance to the ACPI specification.
3329Can
3330affect these predefined names: _ALR, _MLS, _PSS, _TRT, _TSS, _PRT, _HPX,
3331_DLM,
3332_CSD, _PSD, _TSD.
3333
3334Removed code to disable/enable bus master arbitration (ARB_DIS bit in the
3335PM2_CNT register) in the ACPICA sleep/wake interfaces. Management of the
3336ARB_DIS bit must be implemented in the host-dependent C3 processor power
3337state
3338support. Note, ARB_DIS is obsolete and only applies to older chipsets,
3339both
3340Intel and other vendors. (for Intel: ICH4-M and earlier)
3341
3342This change removes the code to disable/enable bus master arbitration
3343during
3344suspend/resume. Use of the ARB_DIS bit in the optional PM2_CNT register
3345causes
3346resume problems on some machines. The change has been in use for over
3347seven
3348years within Linux.
3349
3350Implemented two new external interfaces to support host-directed dynamic
3351ACPI
3352table load and unload. They are intended to simplify the host
3353implementation
3354of hot-plug support:
3355  AcpiLoadTable: Load an SSDT from a buffer into the namespace.
3356  AcpiUnloadParentTable: Unload an SSDT via a named object owned by the
3357table.
3358See the ACPICA reference for additional details. Adds one new file,
3359components/tables/tbxfload.c
3360
3361Implemented and deployed two new interfaces for errors and warnings that
3362are
3363known to be caused by BIOS/firmware issues:
3364  AcpiBiosError: Prints "ACPI Firmware Error" message.
3365  AcpiBiosWarning: Prints "ACPI Firmware Warning" message.
3366Deployed these new interfaces in the ACPICA Table Manager code for ACPI
3367table
3368and FADT errors. Additional deployment to be completed as appropriate in
3369the
3370future. The associated conditional macros are ACPI_BIOS_ERROR and
3371ACPI_BIOS_WARNING. See the ACPICA reference for additional details.
3372ACPICA
3373BZ
3374843.
3375
3376Implicit notify support: ensure that no memory allocation occurs within a
3377critical region. This fix moves a memory allocation outside of the time
3378that a
3379spinlock is held. Fixes issues on systems that do not allow this
3380behavior.
3381Jung-uk Kim.
3382
3383Split exception code utilities and tables into a new file,
3384utilities/utexcep.c
3385
3386Example Code and Data Size: These are the sizes for the OS-independent
3387acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3388debug
3389version of the code includes the debug output trace mechanism and has a
3390much
3391larger code and data size.
3392
3393  Previous Release:
3394    Non-Debug Version:  93.1K Code, 25.1K Data, 118.2K Total
3395    Debug Version:     172.9K Code, 73.6K Data, 246.5K Total
3396  Current Release:
3397    Non-Debug Version:  93.5K Code, 25.3K Data, 118.8K Total
3398    Debug Version:     173.7K Code, 74.0K Data, 247.7K Total
3399
3400
34012) iASL Compiler/Disassembler and Tools:
3402
3403iASL: Fixed a parser problem for hosts where EOF is defined as -1 instead
3404of
34050. Jung-uk Kim.
3406
3407Debugger: Enhanced the "tables" command to emit additional information
3408about
3409the current set of ACPI tables, including the owner ID and flags decode.
3410
3411Debugger: Reimplemented the "unload" command to use the new
3412AcpiUnloadParentTable external interface. This command was disable
3413previously
3414due to need for an unload interface.
3415
3416AcpiHelp: Added a new option to decode ACPICA exception codes. The -e
3417option
3418will decode 16-bit hex status codes (ACPI_STATUS) to name strings.
3419
3420----------------------------------------
342120 June 2012. Summary of changes for version 20120620:
3422
3423
34241) ACPICA Kernel-resident Subsystem:
3425
3426Implemented support to expand the "implicit notify" feature to allow
3427multiple
3428devices to be notified by a single GPE. This feature automatically
3429generates a
3430runtime device notification in the absence of a BIOS-provided GPE control
3431method (_Lxx/_Exx) or a host-installed handler for the GPE. Implicit
3432notify is
3433provided by ACPICA for Windows compatibility, and is a workaround for
3434BIOS
3435AML
3436code errors. See the description of the AcpiSetupGpeForWake interface in
3437the
3438APCICA reference. Bob Moore, Rafael Wysocki. ACPICA BZ 918.
3439
3440Changed some comments and internal function names to simplify and ensure
3441correctness of the Linux code translation. No functional changes.
3442
3443Example Code and Data Size: These are the sizes for the OS-independent
3444acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3445debug
3446version of the code includes the debug output trace mechanism and has a
3447much
3448larger code and data size.
3449
3450  Previous Release:
3451    Non-Debug Version:  93.0K Code, 25.1K Data, 118.1K Total
3452    Debug Version:     172.7K Code, 73.6K Data, 246.3K Total
3453  Current Release:
3454    Non-Debug Version:  93.1K Code, 25.1K Data, 118.2K Total
3455    Debug Version:     172.9K Code, 73.6K Data, 246.5K Total
3456
3457
34582) iASL Compiler/Disassembler and Tools:
3459
3460Disassembler: Added support to emit short, commented descriptions for the
3461ACPI
3462predefined names in order to improve the readability of the disassembled
3463output. ACPICA BZ 959. Changes include:
3464  1) Emit descriptions for all standard predefined names (_INI, _STA,
3465_PRW,
3466etc.)
3467  2) Emit generic descriptions for the special names (_Exx, _Qxx, etc.)
3468  3) Emit descriptions for the resource descriptor names (_MIN, _LEN,
3469etc.)
3470
3471AcpiSrc: Fixed several long-standing Linux code translation issues.
3472Argument
3473descriptions in function headers are now translated properly to lower
3474case
3475and
3476underscores. ACPICA BZ 961. Also fixes translation problems such as
3477these:
3478(old -> new)
3479  i_aSL -> iASL
3480  00-7_f -> 00-7F
3481  16_k -> 16K
3482  local_fADT -> local_FADT
3483  execute_oSI -> execute_OSI
3484
3485iASL: Fixed a problem where null bytes were inadvertently emitted into
3486some
3487listing files.
3488
3489iASL: Added the existing debug options to the standard help screen. There
3490are
3491no longer two different help screens. ACPICA BZ 957.
3492
3493AcpiHelp: Fixed some typos in the various predefined name descriptions.
3494Also
3495expand some of the descriptions where appropriate.
3496
3497iASL: Fixed the -ot option (display compile times/statistics). Was not
3498working
3499properly for standard output; only worked for the debug file case.
3500
3501----------------------------------------
350218 May 2012. Summary of changes for version 20120518:
3503
3504
35051) ACPICA Core Subsystem:
3506
3507Added a new OSL interface, AcpiOsWaitEventsComplete. This interface is
3508defined
3509to block until asynchronous events such as notifies and GPEs have
3510completed.
3511Within ACPICA, it is only called before a notify or GPE handler is
3512removed/uninstalled. It also may be useful for the host OS within related
3513drivers such as the Embedded Controller driver. See the ACPICA reference
3514for
3515additional information. ACPICA BZ 868.
3516
3517ACPI Tables: Added a new error message for a possible overflow failure
3518during
3519the conversion of FADT 32-bit legacy register addresses to internal
3520common
352164-
3522bit GAS structure representation. The GAS has a one-byte "bit length"
3523field,
3524thus limiting the register length to 255 bits. ACPICA BZ 953.
3525
3526Example Code and Data Size: These are the sizes for the OS-independent
3527acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3528debug
3529version of the code includes the debug output trace mechanism and has a
3530much
3531larger code and data size.
3532
3533  Previous Release:
3534    Non-Debug Version:  92.9K Code, 25.0K Data, 117.9K Total
3535    Debug Version:     172.6K Code, 73.4K Data, 246.0K Total
3536  Current Release:
3537    Non-Debug Version:  93.0K Code, 25.1K Data, 118.1K Total
3538    Debug Version:     172.7K Code, 73.6K Data, 246.3K Total
3539
3540
35412) iASL Compiler/Disassembler and Tools:
3542
3543iASL: Added the ACPI 5.0 "PCC" keyword for use in the Register() ASL
3544macro.
3545This keyword was added late in the ACPI 5.0 release cycle and was not
3546implemented until now.
3547
3548Disassembler: Added support for Operation Region externals. Adds missing
3549support for operation regions that are defined in another table, and
3550referenced locally via a Field or BankField ASL operator. Now generates
3551the
3552correct External statement.
3553
3554Disassembler: Several additional fixes for the External() statement
3555generation
3556related to some ASL operators. Also, order the External() statements
3557alphabetically in the disassembler output. Fixes the External()
3558generation
3559for
3560the Create* field, Alias, and Scope operators:
3561 1) Create* buffer field operators - fix type mismatch warning on
3562disassembly
3563 2) Alias - implement missing External support
3564 3) Scope - fix to make sure all necessary externals are emitted.
3565
3566iASL: Improved pathname support. For include files, merge the prefix
3567pathname
3568with the file pathname and eliminate unnecessary components. Convert
3569backslashes in all pathnames to forward slashes, for readability. Include
3570file
3571pathname changes affect both #include and Include() type operators.
3572
3573iASL/DTC/Preprocessor: Gracefully handle early EOF. Handle an EOF at the
3574end
3575of a valid line by inserting a newline and then returning the EOF during
3576the
3577next call to GetNextLine. Prevents the line from being ignored due to EOF
3578condition.
3579
3580iASL: Implemented some changes to enhance the IDE support (-vi option.)
3581Error
3582and Warning messages are now correctly recognized for both the source
3583code
3584browser and the global error and warning counts.
3585
3586----------------------------------------
358720 April 2012. Summary of changes for version 20120420:
3588
3589
35901) ACPICA Core Subsystem:
3591
3592Implemented support for multiple notify handlers. This change adds
3593support
3594to
3595allow multiple system and device notify handlers on Device, Thermal Zone,
3596and
3597Processor objects. This can simplify the host OS notification
3598implementation.
3599Also re-worked and restructured the entire notify support code to
3600simplify
3601handler installation, handler removal, notify event queuing, and notify
3602dispatch to handler(s). Note: there can still only be two global notify
3603handlers - one for system notifies and one for device notifies. There are
3604no
3605changes to the existing handler install/remove interfaces. Lin Ming, Bob
3606Moore, Rafael Wysocki.
3607
3608Fixed a regression in the package repair code where the object reference
3609count was calculated incorrectly. Regression was introduced in the commit
3610"Support to add Package wrappers".
3611
3612Fixed a couple possible memory leaks in the AML parser, in the error
3613recovery
3614path. Jesper Juhl, Lin Ming.
3615
3616Example Code and Data Size: These are the sizes for the OS-independent
3617acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3618debug version of the code includes the debug output trace mechanism and
3619has a
3620much larger code and data size.
3621
3622  Previous Release:
3623    Non-Debug Version:  92.9K Code, 25.0K Data, 117.9K Total
3624    Debug Version:     172.5K Code, 73.2K Data, 245.7K Total
3625  Current Release:
3626    Non-Debug Version:  92.9K Code, 25.0K Data, 117.9K Total
3627    Debug Version:     172.6K Code, 73.4K Data, 246.0K Total
3628
3629
36302) iASL Compiler/Disassembler and Tools:
3631
3632iASL: Fixed a problem with the resource descriptor support where the
3633length
3634of the StartDependentFn and StartDependentFnNoPrio descriptors were not
3635included in cumulative descriptor offset, resulting in incorrect values
3636for
3637resource tags within resource descriptors appearing after a
3638StartDependent*
3639descriptor. Reported by Petr Vandrovec. ACPICA BZ 949.
3640
3641iASL and Preprocessor: Implemented full support for the #line directive
3642to
3643correctly track original source file line numbers through the .i
3644preprocessor
3645output file - for error and warning messages.
3646
3647iASL: Expand the allowable byte constants for address space IDs.
3648Previously,
3649the allowable range was 0x80-0xFF (user-defined spaces), now the range is
36500x0A-0xFF to allow for custom and new IDs without changing the compiler.
3651
3652iASL: Add option to treat all warnings as errors (-we). ACPICA BZ 948.
3653
3654iASL: Add option to completely disable the preprocessor (-Pn).
3655
3656iASL: Now emit all error/warning messages to standard error (stderr) by
3657default (instead of the previous stdout).
3658
3659ASL Test Suite (ASLTS): Reduce iASL warnings due to use of Switch().
3660Update
3661for resource descriptor offset fix above. Update/cleanup error output
3662routines. Enable and send iASL errors/warnings to an error logfile
3663(error.txt). Send all other iASL output to a logfile (compiler.txt).
3664Fixed
3665several extraneous "unrecognized operator" messages.
3666
3667----------------------------------------
366820 March 2012. Summary of changes for version 20120320:
3669
3670
36711) ACPICA Core Subsystem:
3672
3673Enhanced the sleep/wake interfaces to optionally execute the _GTS method
3674(Going To Sleep) and the _BFS method (Back From Sleep). Windows
3675apparently
3676does not execute these methods, and therefore these methods are often
3677untested. It has been seen on some systems where the execution of these
3678methods causes errors and also prevents the machine from entering S5. It
3679is
3680therefore suggested that host operating systems do not execute these
3681methods
3682by default. In the future, perhaps these methods can be optionally
3683executed
3684based on the age of the system and/or what is the newest version of
3685Windows
3686that the BIOS asks for via _OSI. Changed interfaces: AcpiEnterSleepState
3687and
3688AcpileaveSleepStatePrep. See the ACPICA reference and Linux BZ 13041. Lin
3689Ming.
3690
3691Fixed a problem where the length of the local/common FADT was set too
3692early.
3693The local FADT table length cannot be set to the common length until the
3694original length has been examined. There is code that checks the table
3695length
3696and sets various fields appropriately. This can affect older machines
3697with
3698early FADT versions. For example, this can cause inadvertent writes to
3699the
3700CST_CNT register. Julian Anastasov.
3701
3702Fixed a mapping issue related to a physical table override. Use the
3703deferred
3704mapping mechanism for tables loaded via the physical override OSL
3705interface.
3706This allows for early mapping before the virtual memory manager is
3707available.
3708Thomas Renninger, Bob Moore.
3709
3710Enhanced the automatic return-object repair code: Repair a common problem
3711with
3712predefined methods that are defined to return a variable-length Package
3713of
3714sub-objects. If there is only one sub-object, some BIOS ASL code
3715mistakenly
3716simply returns the single object instead of a Package with one sub-
3717object.
3718This new support will repair this error by wrapping a Package object
3719around
3720the original object, creating the correct and expected Package with one
3721sub-
3722object. Names that can be repaired in this manner include: _ALR, _CSD,
3723_HPX,
3724_MLS, _PLD, _PRT, _PSS, _TRT, _TSS, _BCL, _DOD, _FIX, and _Sx. ACPICA BZ
3725939.
3726
3727Changed the exception code returned for invalid ACPI paths passed as
3728parameters to external interfaces such as AcpiEvaluateObject. Was
3729AE_BAD_PARAMETER, now is the more sensible AE_BAD_PATHNAME.
3730
3731Example Code and Data Size: These are the sizes for the OS-independent
3732acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3733debug
3734version of the code includes the debug output trace mechanism and has a
3735much
3736larger code and data size.
3737
3738  Previous Release:
3739    Non-Debug Version:  93.0K Code, 25.0K Data, 118.0K Total
3740    Debug Version:     172.5K Code, 73.2K Data, 245.7K Total
3741  Current Release:
3742    Non-Debug Version:  92.9K Code, 25.0K Data, 117.9K Total
3743    Debug Version:     172.5K Code, 73.2K Data, 245.7K Total
3744
3745
37462) iASL Compiler/Disassembler and Tools:
3747
3748iASL: Added the infrastructure and initial implementation of a integrated
3749C-
3750like preprocessor. This will simplify BIOS development process by
3751eliminating
3752the need for a separate preprocessing step during builds. On Windows, it
3753also
3754eliminates the need to install a separate C compiler. ACPICA BZ 761. Some
3755features including full #define() macro support are still under
3756development.
3757These preprocessor directives are supported:
3758    #define
3759    #elif
3760    #else
3761    #endif
3762    #error
3763    #if
3764    #ifdef
3765    #ifndef
3766    #include
3767    #pragma message
3768    #undef
3769    #warning
3770In addition, these new command line options are supported:
3771    -D <symbol> Define symbol for preprocessor use
3772    -li         Create preprocessed output file (*.i)
3773    -P          Preprocess only and create preprocessor output file (*.i)
3774
3775Table Compiler: Fixed a problem where the equals operator within an
3776expression
3777did not work properly.
3778
3779Updated iASL to use the current versions of Bison/Flex. Updated the
3780Windows
3781project file to invoke these tools from the standard location. ACPICA BZ
3782904.
3783Versions supported:
3784    Flex for Windows:  V2.5.4
3785    Bison for Windows: V2.4.1
3786
3787----------------------------------------
378815 February 2012. Summary of changes for version 20120215:
3789
3790
37911) ACPICA Core Subsystem:
3792
3793There have been some major changes to the sleep/wake support code, as
3794described below (a - e).
3795
3796a) The AcpiLeaveSleepState has been split into two interfaces, similar to
3797AcpiEnterSleepStatePrep and AcpiEnterSleepState. The new interface is
3798AcpiLeaveSleepStatePrep. This allows the host to perform actions between
3799the
3800time the _BFS method is called and the _WAK method is called. NOTE: all
3801hosts
3802must update their wake/resume code or else sleep/wake will not work
3803properly.
3804Rafael Wysocki.
3805
3806b) In AcpiLeaveSleepState, now enable all runtime GPEs before calling the
3807_WAK
3808method. Some machines require that the GPEs are enabled before the _WAK
3809method
3810is executed. Thomas Renninger.
3811
3812c) In AcpiLeaveSleepState, now always clear the WAK_STS (wake status)
3813bit.
3814Some BIOS code assumes that WAK_STS will be cleared on resume and use it
3815to
3816determine whether the system is rebooting or resuming. Matthew Garrett.
3817
3818d) Move the invocations of _GTS (Going To Sleep) and _BFS (Back From
3819Sleep) to
3820match the ACPI specification requirement. Rafael Wysocki.
3821
3822e) Implemented full support for the ACPI 5.0 SleepStatus and SleepControl
3823registers within the V5 FADT. This support adds two new files:
3824hardware/hwesleep.c implements the support for the new registers. Moved
3825all
3826sleep/wake external interfaces to hardware/hwxfsleep.c.
3827
3828
3829Added a new OSL interface for ACPI table overrides,
3830AcpiOsPhysicalTableOverride. This interface allows the host to override a
3831table via a physical address, instead of the logical address required by
3832AcpiOsTableOverride. This simplifies the host implementation. Initial
3833implementation by Thomas Renninger. The ACPICA implementation creates a
3834single
3835shared function for table overrides that attempts both a logical and a
3836physical override.
3837
3838Expanded the OSL memory read/write interfaces to 64-bit data
3839(AcpiOsReadMemory, AcpiOsWriteMemory.) This enables full 64-bit memory
3840transfer support for GAS register structures passed to AcpiRead and
3841AcpiWrite.
3842
3843Implemented the ACPI_REDUCED_HARDWARE option to allow the creation of a
3844custom
3845build of ACPICA that supports only the ACPI 5.0 reduced hardware (SoC)
3846model.
3847See the ACPICA reference for details. ACPICA BZ 942. This option removes
3848about
384910% of the code and 5% of the static data, and the following hardware
3850ACPI
3851features become unavailable:
3852    PM Event and Control registers
3853    SCI interrupt (and handler)
3854    Fixed Events
3855    General Purpose Events (GPEs)
3856    Global Lock
3857    ACPI PM timer
3858    FACS table (Waking vectors and Global Lock)
3859
3860Updated the unix tarball directory structure to match the ACPICA git
3861source
3862tree. This ensures that the generic unix makefiles work properly (in
3863generate/unix).  Also updated the Linux makefiles to match. ACPICA BZ
3864867.
3865
3866Updated the return value of the _REV predefined method to integer value 5
3867to
3868reflect ACPI 5.0 support.
3869
3870Moved the external ACPI PM timer interface prototypes to the public
3871acpixf.h
3872file where they belong.
3873
3874Example Code and Data Size: These are the sizes for the OS-independent
3875acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3876debug
3877version of the code includes the debug output trace mechanism and has a
3878much
3879larger code and data size.
3880
3881  Previous Release:
3882    Non-Debug Version:  92.8K Code, 24.9K Data, 117.7K Total
3883    Debug Version:     171.7K Code, 72.9K Data, 244.5K Total
3884  Current Release:
3885    Non-Debug Version:  93.0K Code, 25.0K Data, 118.0K Total
3886    Debug Version:     172.5K Code, 73.2K Data, 245.7K Total
3887
3888
38892) iASL Compiler/Disassembler and Tools:
3890
3891Disassembler: Fixed a problem with the new ACPI 5.0 serial resource
3892descriptors (I2C, SPI, UART) where the resource produce/consumer bit was
3893incorrectly displayed.
3894
3895AcpiHelp: Add display of ACPI/PNP device IDs that are defined in the ACPI
3896specification.
3897
3898----------------------------------------
389911 January 2012. Summary of changes for version 20120111:
3900
3901
39021) ACPICA Core Subsystem:
3903
3904Implemented a new mechanism to allow host device drivers to check for
3905address
3906range conflicts with ACPI Operation Regions. Both SystemMemory and
3907SystemIO
3908address spaces are supported. A new external interface,
3909AcpiCheckAddressRange,
3910allows drivers to check an address range against the ACPI namespace. See
3911the
3912ACPICA reference for additional details. Adds one new file,
3913utilities/utaddress.c. Lin Ming, Bob Moore.
3914
3915Fixed several issues with the ACPI 5.0 FADT support: Add the sleep
3916Control
3917and
3918Status registers, update the ACPI 5.0 flags, and update internal data
3919structures to handle an FADT larger than 256 bytes. The size of the ACPI
39205.0
3921FADT is 268 bytes.
3922
3923Updated all ACPICA copyrights and signons to 2012. Added the 2012
3924copyright to
3925all module headers and signons, including the standard Linux header. This
3926affects virtually every file in the ACPICA core subsystem, iASL compiler,
3927and
3928all ACPICA utilities.
3929
3930Example Code and Data Size: These are the sizes for the OS-independent
3931acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3932debug
3933version of the code includes the debug output trace mechanism and has a
3934much
3935larger code and data size.
3936
3937  Previous Release:
3938    Non-Debug Version:  92.3K Code, 24.9K Data, 117.2K Total
3939    Debug Version:     170.8K Code, 72.6K Data, 243.4K Total
3940  Current Release:
3941    Non-Debug Version:  92.8K Code, 24.9K Data, 117.7K Total
3942    Debug Version:     171.7K Code, 72.9K Data, 244.5K Total
3943
3944
39452) iASL Compiler/Disassembler and Tools:
3946
3947Disassembler: fixed a problem with the automatic resource tag generation
3948support. Fixes a problem where the resource tags are inadvertently not
3949constructed if the table being disassembled contains external references
3950to
3951control methods. Moved the actual construction of the tags to after the
3952final
3953namespace is constructed (after 2nd parse is invoked due to external
3954control
3955method references.) ACPICA BZ 941.
3956
3957Table Compiler: Make all "generic" operators caseless. These are the
3958operators
3959like UINT8, String, etc. Making these caseless improves ease-of-use.
3960ACPICA BZ
3961934.
3962
3963----------------------------------------
396423 November 2011. Summary of changes for version 20111123:
3965
39660) ACPI 5.0 Support:
3967
3968This release contains full support for the ACPI 5.0 specification, as
3969summarized below.
3970
3971Reduced Hardware Support:
3972-------------------------
3973
3974This support allows for ACPI systems without the usual ACPI hardware.
3975This
3976support is enabled by a flag in the revision 5 FADT. If it is set, ACPICA
3977will
3978not attempt to initialize or use any of the usual ACPI hardware. Note,
3979when
3980this flag is set, all of the following ACPI hardware is assumed to be not
3981present and is not initialized or accessed:
3982
3983    General Purpose Events (GPEs)
3984    Fixed Events (PM1a/PM1b and PM Control)
3985    Power Management Timer and Console Buttons (power/sleep)
3986    Real-time Clock Alarm
3987    Global Lock
3988    System Control Interrupt (SCI)
3989    The FACS is assumed to be non-existent
3990
3991ACPI Tables:
3992------------
3993
3994All new tables and updates to existing tables are fully supported in the
3995ACPICA headers (for use by device drivers), the disassembler, and the
3996iASL
3997Data Table Compiler. ACPI 5.0 defines these new tables:
3998
3999    BGRT        /* Boot Graphics Resource Table */
4000    DRTM        /* Dynamic Root of Trust for Measurement table */
4001    FPDT        /* Firmware Performance Data Table */
4002    GTDT        /* Generic Timer Description Table */
4003    MPST        /* Memory Power State Table */
4004    PCCT        /* Platform Communications Channel Table */
4005    PMTT        /* Platform Memory Topology Table */
4006    RASF        /* RAS Feature table */
4007
4008Operation Regions/SpaceIDs:
4009---------------------------
4010
4011All new operation regions are fully supported by the iASL compiler, the
4012disassembler, and the ACPICA runtime code (for dispatch to region
4013handlers.)
4014The new operation region Space IDs are:
4015
4016    GeneralPurposeIo
4017    GenericSerialBus
4018
4019Resource Descriptors:
4020---------------------
4021
4022All new ASL resource descriptors are fully supported by the iASL
4023compiler,
4024the
4025ASL/AML disassembler, and the ACPICA runtime Resource Manager code
4026(including
4027all new predefined resource tags). New descriptors are:
4028
4029    FixedDma
4030    GpioIo
4031    GpioInt
4032    I2cSerialBus
4033    SpiSerialBus
4034    UartSerialBus
4035
4036ASL/AML Operators, New and Modified:
4037------------------------------------
4038
4039One new operator is added, the Connection operator, which is used to
4040associate
4041a GeneralPurposeIo or GenericSerialBus resource descriptor with
4042individual
4043field objects within an operation region. Several new protocols are
4044associated
4045with the AccessAs operator. All are fully supported by the iASL compiler,
4046disassembler, and runtime ACPICA AML interpreter:
4047
4048    Connection                      // Declare Field Connection
4049attributes
4050    AccessAs: AttribBytes (n)           // Read/Write N-Bytes Protocol
4051    AccessAs: AttribRawBytes (n)        // Raw Read/Write N-Bytes
4052Protocol
4053    AccessAs: AttribRawProcessBytes (n) // Raw Process Call Protocol
4054    RawDataBuffer                       // Data type for Vendor Data
4055fields
4056
4057Predefined ASL/AML Objects:
4058---------------------------
4059
4060All new predefined objects/control-methods are supported by the iASL
4061compiler
4062and the ACPICA runtime validation/repair (arguments and return values.)
4063New
4064predefined names include the following:
4065
4066Standard Predefined Names (Objects or Control Methods):
4067    _AEI, _CLS, _CPC, _CWS, _DEP,
4068    _DLM, _EVT, _GCP, _CRT, _GWS,
4069    _HRV, _PRE, _PSE, _SRT, _SUB.
4070
4071Resource Tags (Names used to access individual fields within resource
4072descriptors):
4073    _DBT, _DPL, _DRS, _END, _FLC,
4074    _IOR, _LIN, _MOD, _PAR, _PHA,
4075    _PIN, _PPI, _POL, _RXL, _SLV,
4076    _SPE, _STB, _TXL, _VEN.
4077
4078ACPICA External Interfaces:
4079---------------------------
4080
4081Several new interfaces have been defined for use by ACPI-related device
4082drivers and other host OS services:
4083
4084AcpiAcquireMutex and AcpiReleaseMutex: These interfaces allow the host OS
4085to
4086acquire and release AML mutexes that are defined in the DSDT/SSDT tables
4087provided by the BIOS. They are intended to be used in conjunction with
4088the
4089ACPI 5.0 _DLM (Device Lock Method) in order to provide transaction-level
4090mutual exclusion with the AML code/interpreter.
4091
4092AcpiGetEventResources: Returns the (formatted) resource descriptors as
4093defined
4094by the ACPI 5.0 _AEI object (ACPI Event Information).  This object
4095provides
4096resource descriptors associated with hardware-reduced platform events,
4097similar
4098to the AcpiGetCurrentResources interface.
4099
4100Operation Region Handlers: For General Purpose IO and Generic Serial Bus
4101operation regions, information about the Connection() object and any
4102optional
4103length information is passed to the region handler within the Context
4104parameter.
4105
4106AcpiBufferToResource: This interface converts a raw AML buffer containing
4107a
4108resource template or resource descriptor to the ACPI_RESOURCE internal
4109format
4110suitable for use by device drivers. Can be used by an operation region
4111handler
4112to convert the Connection() buffer object into a ACPI_RESOURCE.
4113
4114Miscellaneous/Tools/TestSuites:
4115-------------------------------
4116
4117Support for extended _HID names (Four alpha characters instead of three).
4118Support for ACPI 5.0 features in the AcpiExec and AcpiHelp utilities.
4119Support for ACPI 5.0 features in the ASLTS test suite.
4120Fully updated documentation (ACPICA and iASL reference documents.)
4121
4122ACPI Table Definition Language:
4123-------------------------------
4124
4125Support for this language was implemented and released as a subsystem of
4126the
4127iASL compiler in 2010. (See the iASL compiler User Guide.)
4128
4129
4130Non-ACPI 5.0 changes for this release:
4131--------------------------------------
4132
41331) ACPICA Core Subsystem:
4134
4135Fix a problem with operation region declarations where a failure can
4136occur
4137if
4138the region name and an argument that evaluates to an object (such as the
4139region address) are in different namespace scopes. Lin Ming, ACPICA BZ
4140937.
4141
4142Do not abort an ACPI table load if an invalid space ID is found within.
4143This
4144will be caught later if the offending method is executed. ACPICA BZ 925.
4145
4146Fixed an issue with the FFixedHW space ID where the ID was not always
4147recognized properly (Both ACPICA and iASL). ACPICA BZ 926.
4148
4149Fixed a problem with the 32-bit generation of the unix-specific OSL
4150(osunixxf.c). Lin Ming, ACPICA BZ 936.
4151
4152Several changes made to enable generation with the GCC 4.6 compiler.
4153ACPICA BZ
4154935.
4155
4156New error messages: Unsupported I/O requests (not 8/16/32 bit), and
4157Index/Bank
4158field registers out-of-range.
4159
41602) iASL Compiler/Disassembler and Tools:
4161
4162iASL: Implemented the __PATH__ operator, which returns the full pathname
4163of
4164the current source file.
4165
4166AcpiHelp: Automatically display expanded keyword information for all ASL
4167operators.
4168
4169Debugger: Add "Template" command to disassemble/dump resource template
4170buffers.
4171
4172Added a new master script to generate and execute the ASLTS test suite.
4173Automatically handles 32- and 64-bit generation. See tests/aslts.sh
4174
4175iASL: Fix problem with listing generation during processing of the
4176Switch()
4177operator where AML listing was disabled until the entire Switch block was
4178completed.
4179
4180iASL: Improve support for semicolon statement terminators. Fix "invalid
4181character" message for some cases when the semicolon is used. Semicolons
4182are
4183now allowed after every <Term> grammar element. ACPICA BZ 927.
4184
4185iASL: Fixed some possible aliasing warnings during generation. ACPICA BZ
4186923.
4187
4188Disassembler: Fix problem with disassembly of the DataTableRegion
4189operator
4190where an inadvertent "Unhandled deferred opcode" message could be
4191generated.
4192
41933) Example Code and Data Size
4194
4195These are the sizes for the OS-independent acpica.lib produced by the
4196Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
4197includes the debug output trace mechanism and has a much larger code and
4198data
4199size.
4200
4201  Previous Release:
4202    Non-Debug Version:  90.2K Code, 23.9K Data, 114.1K Total
4203    Debug Version:     165.6K Code, 68.4K Data, 234.0K Total
4204  Current Release:
4205    Non-Debug Version:  92.3K Code, 24.9K Data, 117.2K Total
4206    Debug Version:     170.8K Code, 72.6K Data, 243.4K Total
4207
4208----------------------------------------
420922 September 2011. Summary of changes for version 20110922:
4210
42110) ACPI 5.0 News:
4212
4213Support for ACPI 5.0 in ACPICA has been underway for several months and
4214will
4215be released at the same time that ACPI 5.0 is officially released.
4216
4217The ACPI 5.0 specification is on track for release in the next few
4218months.
4219
42201) ACPICA Core Subsystem:
4221
4222Fixed a problem where the maximum sleep time for the Sleep() operator was
4223intended to be limited to two seconds, but was inadvertently limited to
422420
4225seconds instead.
4226
4227Linux and Unix makefiles: Added header file dependencies to ensure
4228correct
4229generation of ACPICA core code and utilities. Also simplified the
4230makefiles
4231considerably through the use of the vpath variable to specify search
4232paths.
4233ACPICA BZ 924.
4234
42352) iASL Compiler/Disassembler and Tools:
4236
4237iASL: Implemented support to check the access length for all fields
4238created to
4239access named Resource Descriptor fields. For example, if a resource field
4240is
4241defined to be two bits, a warning is issued if a CreateXxxxField() is
4242used
4243with an incorrect bit length. This is implemented for all current
4244resource
4245descriptor names. ACPICA BZ 930.
4246
4247Disassembler: Fixed a byte ordering problem with the output of 24-bit and
424856-
4249bit integers.
4250
4251iASL: Fixed a couple of issues associated with variable-length package
4252objects. 1) properly handle constants like One, Ones, Zero -- do not make
4253a
4254VAR_PACKAGE when these are used as a package length. 2) Allow the
4255VAR_PACKAGE
4256opcode (in addition to PACKAGE) when validating object types for
4257predefined
4258names.
4259
4260iASL: Emit statistics for all output files (instead of just the ASL input
4261and
4262AML output). Includes listings, hex files, etc.
4263
4264iASL: Added -G option to the table compiler to allow the compilation of
4265custom
4266ACPI tables. The only part of a table that is required is the standard
426736-
4268byte
4269ACPI header.
4270
4271AcpiXtract: Ported to the standard ACPICA environment (with ACPICA
4272headers),
4273which also adds correct 64-bit support. Also, now all output filenames
4274are
4275completely lower case.
4276
4277AcpiExec: Ignore any non-AML tables (tables other than DSDT or SSDT) when
4278loading table files. A warning is issued for any such tables. The only
4279exception is an FADT. This also fixes a possible fault when attempting to
4280load
4281non-AML tables. ACPICA BZ 932.
4282
4283AcpiHelp: Added the AccessAs and Offset operators. Fixed a problem where
4284a
4285missing table terminator could cause a fault when using the -p option.
4286
4287AcpiSrc: Fixed a possible divide-by-zero fault when generating file
4288statistics.
4289
42903) Example Code and Data Size
4291
4292These are the sizes for the OS-independent acpica.lib produced by the
4293Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
4294includes the debug output trace mechanism and has a much larger code and
4295data
4296size.
4297
4298  Previous Release (VC 9.0):
4299    Non-Debug Version:  90.2K Code, 23.9K Data, 114.1K Total
4300    Debug Version:     165.6K Code, 68.4K Data, 234.0K Total
4301  Current Release (VC 9.0):
4302    Non-Debug Version:  90.2K Code, 23.9K Data, 114.1K Total
4303    Debug Version:     165.6K Code, 68.4K Data, 234.0K Total
4304
4305
4306----------------------------------------
430723 June 2011. Summary of changes for version 20110623:
4308
43091) ACPI CA Core Subsystem:
4310
4311Updated the predefined name repair mechanism to not attempt repair of a
4312_TSS
4313return object if a _PSS object is present. We can only sort the _TSS
4314return
4315package if there is no _PSS within the same scope. This is because if
4316_PSS
4317is
4318present, the ACPI specification dictates that the _TSS Power Dissipation
4319field
4320is to be ignored, and therefore some BIOSs leave garbage values in the
4321_TSS
4322Power field(s). In this case, it is best to just return the _TSS package
4323as-
4324is. Reported by, and fixed with assistance from Fenghua Yu.
4325
4326Added an option to globally disable the control method return value
4327validation
4328and repair. This runtime option can be used to disable return value
4329repair
4330if
4331this is causing a problem on a particular machine. Also added an option
4332to
4333AcpiExec (-dr) to set this disable flag.
4334
4335All makefiles and project files: Major changes to improve generation of
4336ACPICA
4337tools. ACPICA BZ 912:
4338    Reduce default optimization levels to improve compatibility
4339    For Linux, add strict-aliasing=0 for gcc 4
4340    Cleanup and simplify use of command line defines
4341    Cleanup multithread library support
4342    Improve usage messages
4343
4344Linux-specific header: update handling of THREAD_ID and pthread. For the
434532-
4346bit case, improve casting to eliminate possible warnings, especially with
4347the
4348acpica tools.
4349
4350Example Code and Data Size: These are the sizes for the OS-independent
4351acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4352debug
4353version of the code includes the debug output trace mechanism and has a
4354much
4355larger code and data size.
4356
4357  Previous Release (VC 9.0):
4358    Non-Debug Version:  90.1K Code, 23.9K Data, 114.0K Total
4359    Debug Version:     165.6K Code, 68.4K Data, 234.0K Total
4360  Current Release (VC 9.0):
4361    Non-Debug Version:  90.2K Code, 23.9K Data, 114.1K Total
4362    Debug Version:     165.6K Code, 68.4K Data, 234.0K Total
4363
43642) iASL Compiler/Disassembler and Tools:
4365
4366With this release, a new utility named "acpihelp" has been added to the
4367ACPICA
4368package. This utility summarizes the ACPI specification chapters for the
4369ASL
4370and AML languages. It generates under Linux/Unix as well as Windows, and
4371provides the following functionality:
4372    Find/display ASL operator(s) -- with description and syntax.
4373    Find/display ASL keyword(s) -- with exact spelling and descriptions.
4374    Find/display ACPI predefined name(s) -- with description, number
4375        of arguments, and the return value data type.
4376    Find/display AML opcode name(s) -- with opcode, arguments, and
4377grammar.
4378    Decode/display AML opcode -- with opcode name, arguments, and
4379grammar.
4380
4381Service Layers: Make multi-thread support configurable. Conditionally
4382compile
4383the multi-thread support so that threading libraries will not be linked
4384if
4385not
4386necessary. The only tool that requires multi-thread support is AcpiExec.
4387
4388iASL: Update yyerrror/AslCompilerError for "const" errors. Newer versions
4389of
4390Bison appear to want the interface to yyerror to be a const char * (or at
4391least this is a problem when generating iASL on some systems.) ACPICA BZ
4392923
4393Pierre Lejeune.
4394
4395Tools: Fix for systems where O_BINARY is not defined. Only used for
4396Windows
4397versions of the tools.
4398
4399----------------------------------------
440027 May 2011. Summary of changes for version 20110527:
4401
44021) ACPI CA Core Subsystem:
4403
4404ASL Load() operator: Reinstate most restrictions on the incoming ACPI
4405table
4406signature. Now, only allow SSDT, OEMx, and a null signature. History:
4407    1) Originally, we checked the table signature for "SSDT" or "PSDT".
4408       (PSDT is now obsolete.)
4409    2) We added support for OEMx tables, signature "OEM" plus a fourth
4410       "don't care" character.
4411    3) Valid tables were encountered with a null signature, so we just
4412       gave up on validating the signature, (05/2008).
4413    4) We encountered non-AML tables such as the MADT, which caused
4414       interpreter errors and kernel faults. So now, we once again allow
4415       only SSDT, OEMx, and now, also a null signature. (05/2011).
4416
4417Added the missing _TDL predefined name to the global name list in order
4418to
4419enable validation. Affects both the core ACPICA code and the iASL
4420compiler.
4421
4422Example Code and Data Size: These are the sizes for the OS-independent
4423acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4424debug
4425version of the code includes the debug output trace mechanism and has a
4426much
4427larger code and data size.
4428
4429  Previous Release (VC 9.0):
4430    Non-Debug Version:  90.0K Code, 23.8K Data, 113.8K Total
4431    Debug Version:     164.5K Code, 68.0K Data, 232.5K Total
4432  Current Release (VC 9.0):
4433    Non-Debug Version:  90.1K Code, 23.9K Data, 114.0K Total
4434    Debug Version:     165.6K Code, 68.4K Data, 234.0K Total
4435
44362) iASL Compiler/Disassembler and Tools:
4437
4438Debugger/AcpiExec: Implemented support for "complex" method arguments on
4439the
4440debugger command line. This adds support beyond simple integers --
4441including
4442Strings, Buffers, and Packages. Includes support for nested packages.
4443Increased the default command line buffer size to accommodate these
4444arguments.
4445See the ACPICA reference for details and syntax. ACPICA BZ 917.
4446
4447Debugger/AcpiExec: Implemented support for "default" method arguments for
4448the
4449Execute/Debug command. Now, the debugger will always invoke a control
4450method
4451with the required number of arguments -- even if the command line
4452specifies
4453none or insufficient arguments. It uses default integer values for any
4454missing
4455arguments. Also fixes a bug where only six method arguments maximum were
4456supported instead of the required seven.
4457
4458Debugger/AcpiExec: Add a maximum buffer length parameter to AcpiOsGetLine
4459and
4460also return status in order to prevent buffer overruns. See the ACPICA
4461reference for details and syntax. ACPICA BZ 921
4462
4463iASL: Cleaned up support for Berkeley yacc. A general cleanup of code and
4464makefiles to simplify support for the two different but similar parser
4465generators, bison and yacc.
4466
4467Updated the generic unix makefile for gcc 4. The default gcc version is
4468now
4469expected to be 4 or greater, since options specific to gcc 4 are used.
4470
4471----------------------------------------
447213 April 2011. Summary of changes for version 20110413:
4473
44741) ACPI CA Core Subsystem:
4475
4476Implemented support to execute a so-called "orphan" _REG method under the
4477EC
4478device. This change will force the execution of a _REG method underneath
4479the
4480EC
4481device even if there is no corresponding operation region of type
4482EmbeddedControl. Fixes a problem seen on some machines and apparently is
4483compatible with Windows behavior. ACPICA BZ 875.
4484
4485Added more predefined methods that are eligible for automatic NULL
4486package
4487element removal. This change adds another group of predefined names to
4488the
4489list
4490of names that can be repaired by having NULL package elements dynamically
4491removed. This group are those methods that return a single variable-
4492length
4493package containing simple data types such as integers, buffers, strings.
4494This
4495includes: _ALx, _BCL, _CID,_ DOD, _EDL, _FIX, _PCL, _PLD, _PMD, _PRx,
4496_PSL,
4497_Sx,
4498and _TZD. ACPICA BZ 914.
4499
4500Split and segregated all internal global lock functions to a new file,
4501evglock.c.
4502
4503Updated internal address SpaceID for DataTable regions. Moved this
4504internal
4505space
4506id in preparation for ACPI 5.0 changes that will include some new space
4507IDs.
4508This
4509change should not affect user/host code.
4510
4511Example Code and Data Size: These are the sizes for the OS-independent
4512acpica.lib
4513produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
4514version of
4515the code includes the debug output trace mechanism and has a much larger
4516code
4517and
4518data size.
4519
4520  Previous Release (VC 9.0):
4521    Non-Debug Version:  89.8K Code, 23.8K Data, 113.6K Total
4522    Debug Version:     164.2K Code, 67.9K Data, 232.1K Total
4523  Current Release (VC 9.0):
4524    Non-Debug Version:  90.0K Code, 23.8K Data, 113.8K Total
4525    Debug Version:     164.5K Code, 68.0K Data, 232.5K Total
4526
45272) iASL Compiler/Disassembler and Tools:
4528
4529iASL/DTC: Major update for new grammar features. Allow generic data types
4530in
4531custom ACPI tables. Field names are now optional. Any line can be split
4532to
4533multiple lines using the continuation char (\). Large buffers now use
4534line-
4535continuation character(s) and no colon on the continuation lines. See the
4536grammar
4537update in the iASL compiler reference. ACPI BZ 910,911. Lin Ming, Bob
4538Moore.
4539
4540iASL: Mark ASL "Return()" and the simple "Return" as "Null" return
4541statements.
4542Since the parser stuffs a "zero" as the return value for these statements
4543(due
4544to
4545the underlying AML grammar), they were seen as "return with value" by the
4546iASL
4547semantic checking. They are now seen correctly as "null" return
4548statements.
4549
4550iASL: Check if a_REG declaration has a corresponding Operation Region.
4551Adds a
4552check for each _REG to ensure that there is in fact a corresponding
4553operation
4554region declaration in the same scope. If not, the _REG method is not very
4555useful
4556since it probably won't be executed. ACPICA BZ 915.
4557
4558iASL/DTC: Finish support for expression evaluation. Added a new
4559expression
4560parser
4561that implements c-style operator precedence and parenthesization. ACPICA
4562bugzilla
4563908.
4564
4565Disassembler/DTC: Remove support for () and <> style comments in data
4566tables.
4567Now
4568that DTC has full expression support, we don't want to have comment
4569strings
4570that
4571start with a parentheses or a less-than symbol. Now, only the standard /*
4572and
4573//
4574comments are supported, as well as the bracket [] comments.
4575
4576AcpiXtract: Fix for RSDP and dynamic SSDT extraction. These tables have
4577"unusual"
4578headers in the acpidump file. Update the header validation to support
4579these
4580tables. Problem introduced in previous AcpiXtract version in the change
4581to
4582support "wrong checksum" error messages emitted by acpidump utility.
4583
4584iASL: Add a * option to generate all template files (as a synonym for
4585ALL)
4586as
4587in
4588"iasl -T *" or "iasl -T ALL".
4589
4590iASL/DTC: Do not abort compiler on fatal errors. We do not want to
4591completely
4592abort the compiler on "fatal" errors, simply should abort the current
4593compile.
4594This allows multiple compiles with a single (possibly wildcard) compiler
4595invocation.
4596
4597----------------------------------------
459816 March 2011. Summary of changes for version 20110316:
4599
46001) ACPI CA Core Subsystem:
4601
4602Fixed a problem caused by a _PRW method appearing at the namespace root
4603scope
4604during the setup of wake GPEs. A fault could occur if a _PRW directly
4605under
4606the
4607root object was passed to the AcpiSetupGpeForWake interface. Lin Ming.
4608
4609Implemented support for "spurious" Global Lock interrupts. On some
4610systems, a
4611global lock interrupt can occur without the pending flag being set. Upon
4612a
4613GL
4614interrupt, we now ensure that a thread is actually waiting for the lock
4615before
4616signaling GL availability. Rafael Wysocki, Bob Moore.
4617
4618Example Code and Data Size: These are the sizes for the OS-independent
4619acpica.lib
4620produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
4621version of
4622the code includes the debug output trace mechanism and has a much larger
4623code
4624and
4625data size.
4626
4627  Previous Release (VC 9.0):
4628    Non-Debug Version:  89.7K Code, 23.7K Data, 113.4K Total
4629    Debug Version:     163.9K Code, 67.5K Data, 231.4K Total
4630  Current Release (VC 9.0):
4631    Non-Debug Version:  89.8K Code, 23.8K Data, 113.6K Total
4632    Debug Version:     164.2K Code, 67.9K Data, 232.1K Total
4633
46342) iASL Compiler/Disassembler and Tools:
4635
4636Implemented full support for the "SLIC" ACPI table. Includes support in
4637the
4638header files, disassembler, table compiler, and template generator. Bob
4639Moore,
4640Lin Ming.
4641
4642AcpiXtract: Correctly handle embedded comments and messages from
4643AcpiDump.
4644Apparently some or all versions of acpidump will occasionally emit a
4645comment
4646like
4647"Wrong checksum", etc., into the dump file. This was causing problems for
4648AcpiXtract. ACPICA BZ 905.
4649
4650iASL: Fix the Linux makefile by removing an inadvertent double file
4651inclusion.
4652ACPICA BZ 913.
4653
4654AcpiExec: Update installation of operation region handlers. Install one
4655handler
4656for a user-defined address space. This is used by the ASL test suite
4657(ASLTS).
4658
4659----------------------------------------
466011 February 2011. Summary of changes for version 20110211:
4661
46621) ACPI CA Core Subsystem:
4663
4664Added a mechanism to defer _REG methods for some early-installed
4665handlers.
4666Most user handlers should be installed before call to
4667AcpiEnableSubsystem.
4668However, Event handlers and region handlers should be installed after
4669AcpiInitializeObjects. Override handlers for the "default" regions should
4670be
4671installed early, however. This change executes all _REG methods for the
4672default regions (Memory/IO/PCI/DataTable) simultaneously to prevent any
4673chicken/egg issues between them. ACPICA BZ 848.
4674
4675Implemented an optimization for GPE detection. This optimization will
4676simply
4677ignore GPE registers that contain no enabled GPEs -- there is no need to
4678read the register since this information is available internally. This
4679becomes more important on machines with a large GPE space. ACPICA
4680bugzilla
4681884. Lin Ming. Suggestion from Joe Liu.
4682
4683Removed all use of the highly unreliable FADT revision field. The
4684revision
4685number in the FADT has been found to be completely unreliable and cannot
4686be
4687trusted. Only the actual table length can be used to infer the version.
4688This
4689change updates the ACPICA core and the disassembler so that both no
4690longer
4691even look at the FADT version and instead depend solely upon the FADT
4692length.
4693
4694Fix an unresolved name issue for the no-debug and no-error-message source
4695generation cases. The _AcpiModuleName was left undefined in these cases,
4696but
4697it is actually needed as a parameter to some interfaces. Define
4698_AcpiModuleName as a null string in these cases. ACPICA Bugzilla 888.
4699
4700Split several large files (makefiles and project files updated)
4701  utglobal.c   -> utdecode.c
4702  dbcomds.c    -> dbmethod.c dbnames.c
4703  dsopcode.c   -> dsargs.c dscontrol.c
4704  dsload.c     -> dsload2.c
4705  aslanalyze.c -> aslbtypes.c aslwalks.c
4706
4707Example Code and Data Size: These are the sizes for the OS-independent
4708acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4709debug version of the code includes the debug output trace mechanism and
4710has
4711a much larger code and data size.
4712
4713  Previous Release (VC 9.0):
4714    Non-Debug Version:  89.7K Code, 23.7K Data, 113.4K Total
4715    Debug Version:     163.9K Code, 67.5K Data, 231.4K Total
4716  Current Release (VC 9.0):
4717    Non-Debug Version:  89.7K Code, 23.7K Data, 113.4K Total
4718    Debug Version:     163.9K Code, 67.5K Data, 231.4K Total
4719
47202) iASL Compiler/Disassembler and Tools:
4721
4722iASL: Implemented the predefined macros __LINE__, __FILE__, and __DATE__.
4723These are useful C-style macros with the standard definitions. ACPICA
4724bugzilla 898.
4725
4726iASL/DTC: Added support for integer expressions and labels. Support for
4727full
4728expressions for all integer fields in all ACPI tables. Support for labels
4729in
4730"generic" portions of tables such as UEFI. See the iASL reference manual.
4731
4732Debugger: Added a command to display the status of global handlers. The
4733"handlers" command will display op region, fixed event, and miscellaneous
4734global handlers. installation status -- and for op regions, whether
4735default
4736or user-installed handler will be used.
4737
4738iASL: Warn if reserved method incorrectly returns a value. Many
4739predefined
4740names are defined such that they do not return a value. If implemented as
4741a
4742method, issue a warning if such a name explicitly returns a value. ACPICA
4743Bugzilla 855.
4744
4745iASL: Added detection of GPE method name conflicts. Detects a conflict
4746where
4747there are two GPE methods of the form _Lxy and _Exy in the same scope.
4748(For
4749example, _L1D and _E1D in the same scope.) ACPICA bugzilla 848.
4750
4751iASL/DTC: Fixed a couple input scanner issues with comments and line
4752numbers. Comment remover could get confused and miss a comment ending.
4753Fixed
4754a problem with line counter maintenance.
4755
4756iASL/DTC: Reduced the severity of some errors from fatal to error. There
4757is
4758no need to abort on simple errors within a field definition.
4759
4760Debugger: Simplified the output of the help command. All help output now
4761in
4762a single screen, instead of help subcommands. ACPICA Bugzilla 897.
4763
4764----------------------------------------
476512 January 2011. Summary of changes for version 20110112:
4766
47671) ACPI CA Core Subsystem:
4768
4769Fixed a race condition between method execution and namespace walks that
4770can
4771possibly cause a fault. The problem was apparently introduced in version
477220100528 as a result of a performance optimization that reduces the
4773number
4774of
4775namespace walks upon method exit by using the delete_namespace_subtree
4776function instead of the delete_namespace_by_owner function used
4777previously.
4778Bug is a missing namespace lock in the delete_namespace_subtree function.
4779dana.myers@oracle.com
4780
4781Fixed several issues and a possible fault with the automatic "serialized"
4782method support. History: This support changes a method to "serialized" on
4783the
4784fly if the method generates an AE_ALREADY_EXISTS error, indicating the
4785possibility that it cannot handle reentrancy. This fix repairs a couple
4786of
4787issues seen in the field, especially on machines with many cores:
4788
4789    1) Delete method children only upon the exit of the last thread,
4790       so as to not delete objects out from under other running threads
4791      (and possibly causing a fault.)
4792    2) Set the "serialized" bit for the method only upon the exit of the
4793       Last thread, so as to not cause deadlock when running threads
4794       attempt to exit.
4795    3) Cleanup the use of the AML "MethodFlags" and internal method flags
4796       so that there is no longer any confusion between the two.
4797
4798    Lin Ming, Bob Moore. Reported by dana.myers@oracle.com.
4799
4800Debugger: Now lock the namespace for duration of a namespace dump.
4801Prevents
4802issues if the namespace is changing dynamically underneath the debugger.
4803Especially affects temporary namespace nodes, since the debugger displays
4804these also.
4805
4806Updated the ordering of include files. The ACPICA headers should appear
4807before any compiler-specific headers (stdio.h, etc.) so that acenv.h can
4808set
4809any necessary compiler-specific defines, etc. Affects the ACPI-related
4810tools
4811and utilities.
4812
4813Updated all ACPICA copyrights and signons to 2011. Added the 2011
4814copyright
4815to all module headers and signons, including the Linux header. This
4816affects
4817virtually every file in the ACPICA core subsystem, iASL compiler, and all
4818utilities.
4819
4820Added project files for MS Visual Studio 2008 (VC++ 9.0). The original
4821project files for VC++ 6.0 are now obsolete. New project files can be
4822found
4823under acpica/generate/msvc9. See acpica/generate/msvc9/readme.txt for
4824details.
4825
4826Example Code and Data Size: These are the sizes for the OS-independent
4827acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4828debug version of the code includes the debug output trace mechanism and
4829has a
4830much larger code and data size.
4831
4832  Previous Release (VC 6.0):
4833    Non-Debug Version:  89.8K Code, 18.9K Data, 108.7K Total
4834    Debug Version:     166.6K Code, 52.1K Data, 218.7K Total
4835  Current Release (VC 9.0):
4836    Non-Debug Version:  89.7K Code, 23.7K Data, 113.4K Total
4837    Debug Version:     163.9K Code, 67.5K Data, 231.4K Total
4838
48392) iASL Compiler/Disassembler and Tools:
4840
4841iASL: Added generic data types to the Data Table compiler. Add "generic"
4842data
4843types such as UINT32, String, Unicode, etc., to simplify the generation
4844of
4845platform-defined tables such as UEFI. Lin Ming.
4846
4847iASL: Added listing support for the Data Table Compiler. Adds listing
4848support
4849(-l) to display actual binary output for each line of input code.
4850
4851----------------------------------------
485209 December 2010. Summary of changes for version 20101209:
4853
48541) ACPI CA Core Subsystem:
4855
4856Completed the major overhaul of the GPE support code that was begun in
4857July
48582010. Major features include: removal of _PRW execution in ACPICA (host
4859executes _PRWs anyway), cleanup of "wake" GPE interfaces and processing,
4860changes to existing interfaces, simplification of GPE handler operation,
4861and
4862a handful of new interfaces:
4863
4864    AcpiUpdateAllGpes
4865    AcpiFinishGpe
4866    AcpiSetupGpeForWake
4867    AcpiSetGpeWakeMask
4868    One new file, evxfgpe.c to consolidate all external GPE interfaces.
4869
4870See the ACPICA Programmer Reference for full details and programming
4871information. See the new section 4.4 "General Purpose Event (GPE)
4872Support"
4873for a full overview, and section 8.7 "ACPI General Purpose Event
4874Management"
4875for programming details. ACPICA BZ 858,870,877. Matthew Garrett, Lin
4876Ming,
4877Bob Moore, Rafael Wysocki.
4878
4879Implemented a new GPE feature for Windows compatibility, the "Implicit
4880Wake
4881GPE Notify". This feature will automatically issue a Notify(2) on a
4882device
4883when a Wake GPE is received if there is no corresponding GPE method or
4884handler. ACPICA BZ 870.
4885
4886Fixed a problem with the Scope() operator during table parse and load
4887phase.
4888During load phase (table load or method execution), the scope operator
4889should
4890not enter the target into the namespace. Instead, it should open a new
4891scope
4892at the target location. Linux BZ 19462, ACPICA BZ 882.
4893
4894Example Code and Data Size: These are the sizes for the OS-independent
4895acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4896debug version of the code includes the debug output trace mechanism and
4897has a
4898much larger code and data size.
4899
4900  Previous Release:
4901    Non-Debug Version:  89.8K Code, 18.9K Data, 108.7K Total
4902    Debug Version:     166.6K Code, 52.1K Data, 218.7K Total
4903  Current Release:
4904    Non-Debug Version:  89.9K Code, 19.0K Data, 108.9K Total
4905    Debug Version:     166.3K Code, 52.1K Data, 218.4K Total
4906
49072) iASL Compiler/Disassembler and Tools:
4908
4909iASL: Relax the alphanumeric restriction on _CID strings. These strings
4910are
4911"bus-specific" per the ACPI specification, and therefore any characters
4912are
4913acceptable. The only checks that can be performed are for a null string
4914and
4915perhaps for a leading asterisk. ACPICA BZ 886.
4916
4917iASL: Fixed a problem where a syntax error that caused a premature EOF
4918condition on the source file emitted a very confusing error message. The
4919premature EOF is now detected correctly. ACPICA BZ 891.
4920
4921Disassembler: Decode the AccessSize within a Generic Address Structure
4922(byte
4923access, word access, etc.) Note, this field does not allow arbitrary bit
4924access, the size is encoded as 1=byte, 2=word, 3=dword, and 4=qword.
4925
4926New: AcpiNames utility - Example namespace dump utility. Shows an example
4927of
4928ACPICA configuration for a minimal namespace dump utility. Uses table and
4929namespace managers, but no AML interpreter. Does not add any
4930functionality
4931over AcpiExec, it is a subset of AcpiExec. The purpose is to show how to
4932partition and configure ACPICA. ACPICA BZ 883.
4933
4934AML Debugger: Increased the debugger buffer size for method return
4935objects.
4936Was 4K, increased to 16K. Also enhanced error messages for debugger
4937method
4938execution, including the buffer overflow case.
4939
4940----------------------------------------
494113 October 2010. Summary of changes for version 20101013:
4942
49431) ACPI CA Core Subsystem:
4944
4945Added support to clear the PCIEXP_WAKE event. When clearing ACPI events,
4946now
4947clear the PCIEXP_WAKE_STS bit in the ACPI PM1 Status Register, via
4948HwClearAcpiStatus. Original change from Colin King. ACPICA BZ 880.
4949
4950Changed the type of the predefined namespace object _TZ from ThermalZone
4951to
4952Device. This was found to be confusing to the host software that
4953processes
4954the various thermal zones, since _TZ is not really a ThermalZone.
4955However,
4956a
4957Notify() can still be performed on it. ACPICA BZ 876. Suggestion from Rui
4958Zhang.
4959
4960Added Windows Vista SP2 to the list of supported _OSI strings. The actual
4961string is "Windows 2006 SP2".
4962
4963Eliminated duplicate code in AcpiUtExecute* functions. Now that the
4964nsrepair
4965code automatically repairs _HID-related strings, this type of code is no
4966longer needed in Execute_HID, Execute_CID, and Execute_UID. ACPICA BZ
4967878.
4968
4969Example Code and Data Size: These are the sizes for the OS-independent
4970acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
4971debug version of the code includes the debug output trace mechanism and
4972has a
4973much larger code and data size.
4974
4975  Previous Release:
4976    Non-Debug Version:  89.9K Code, 19.0K Data, 108.9K Total
4977    Debug Version:     166.3K Code, 52.1K Data, 218.4K Total
4978  Current Release:
4979    Non-Debug Version:  89.9K Code, 19.0K Data, 108.9K Total
4980    Debug Version:     166.3K Code, 52.1K Data, 218.4K Total
4981
49822) iASL Compiler/Disassembler and Tools:
4983
4984iASL: Implemented additional compile-time validation for _HID strings.
4985The
4986non-hex prefix (such as "PNP" or "ACPI") must be uppercase, and the
4987length
4988of
4989the string must be exactly seven or eight characters. For both _HID and
4990_CID
4991strings, all characters must be alphanumeric. ACPICA BZ 874.
4992
4993iASL: Allow certain "null" resource descriptors. Some BIOS code creates
4994descriptors that are mostly or all zeros, with the expectation that they
4995will
4996be filled in at runtime. iASL now allows this as long as there is a
4997"resource
4998tag" (name) associated with the descriptor, which gives the ASL a handle
4999needed to modify the descriptor. ACPICA BZ 873.
5000
5001Added single-thread support to the generic Unix application OSL.
5002Primarily
5003for iASL support, this change removes the use of semaphores in the
5004single-
5005threaded ACPICA tools/applications - increasing performance. The
5006_MULTI_THREADED option was replaced by the (reverse) ACPI_SINGLE_THREADED
5007option. ACPICA BZ 879.
5008
5009AcpiExec: several fixes for the 64-bit version. Adds XSDT support and
5010support
5011for 64-bit DSDT/FACS addresses in the FADT. Lin Ming.
5012
5013iASL: Moved all compiler messages to a new file, aslmessages.h.
5014
5015----------------------------------------
501615 September 2010. Summary of changes for version 20100915:
5017
50181) ACPI CA Core Subsystem:
5019
5020Removed the AcpiOsDerivePciId OSL interface. The various host
5021implementations
5022of this function were not OS-dependent and are now obsolete and can be
5023removed from all host OSLs. This function has been replaced by
5024AcpiHwDerivePciId, which is now part of the ACPICA core code.
5025AcpiHwDerivePciId has been implemented without recursion. Adds one new
5026module, hwpci.c. ACPICA BZ 857.
5027
5028Implemented a dynamic repair for _HID and _CID strings. The following
5029problems are now repaired at runtime: 1) Remove a leading asterisk in the
5030string, and 2) the entire string is uppercased. Both repairs are in
5031accordance with the ACPI specification and will simplify host driver
5032code.
5033ACPICA BZ 871.
5034
5035The ACPI_THREAD_ID type is no longer configurable, internally it is now
5036always UINT64. This simplifies the ACPICA code, especially any printf
5037output.
5038UINT64 is the only common data type for all thread_id types across all
5039operating systems. It is now up to the host OSL to cast the native
5040thread_id
5041type to UINT64 before returning the value to ACPICA (via
5042AcpiOsGetThreadId).
5043Lin Ming, Bob Moore.
5044
5045Added the ACPI_INLINE type to enhance the ACPICA configuration. The
5046"inline"
5047keyword is not standard across compilers, and this type allows inline to
5048be
5049configured on a per-compiler basis. Lin Ming.
5050
5051Made the system global AcpiGbl_SystemAwakeAndRunning publically
5052available.
5053Added an extern for this boolean in acpixf.h. Some hosts utilize this
5054value
5055during suspend/restore operations. ACPICA BZ 869.
5056
5057All code that implements error/warning messages with the "ACPI:" prefix
5058has
5059been moved to a new module, utxferror.c.
5060
5061The UINT64_OVERLAY was moved to utmath.c, which is the only module where
5062it
5063is used. ACPICA BZ 829. Lin Ming, Bob Moore.
5064
5065Example Code and Data Size: These are the sizes for the OS-independent
5066acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5067debug version of the code includes the debug output trace mechanism and
5068has a
5069much larger code and data size.
5070
5071  Previous Release:
5072    Non-Debug Version:  89.1K Code, 19.0K Data, 108.1K Total
5073    Debug Version:     165.1K Code, 51.9K Data, 217.0K Total
5074  Current Release:
5075    Non-Debug Version:  89.9K Code, 19.0K Data, 108.9K Total
5076    Debug Version:     166.3K Code, 52.1K Data, 218.4K Total
5077
50782) iASL Compiler/Disassembler and Tools:
5079
5080iASL/Disassembler: Write ACPI errors to stderr instead of the output
5081file.
5082This keeps the output files free of random error messages that may
5083originate
5084from within the namespace/interpreter code. Used this opportunity to
5085merge
5086all ACPI:-style messages into a single new module, utxferror.c. ACPICA BZ
5087866. Lin Ming, Bob Moore.
5088
5089Tools: update some printfs for ansi warnings on size_t. Handle width
5090change
5091of size_t on 32-bit versus 64-bit generations. Lin Ming.
5092
5093----------------------------------------
509406 August 2010. Summary of changes for version 20100806:
5095
50961) ACPI CA Core Subsystem:
5097
5098Designed and implemented a new host interface to the _OSI support code.
5099This
5100will allow the host to dynamically add or remove multiple _OSI strings,
5101as
5102well as install an optional handler that is called for each _OSI
5103invocation.
5104Also added a new AML debugger command, 'osi' to display and modify the
5105global
5106_OSI string table, and test support in the AcpiExec utility. See the
5107ACPICA
5108reference manual for full details. Lin Ming, Bob Moore. ACPICA BZ 836.
5109New Functions:
5110    AcpiInstallInterface - Add an _OSI string.
5111    AcpiRemoveInterface - Delete an _OSI string.
5112    AcpiInstallInterfaceHandler - Install optional _OSI handler.
5113Obsolete Functions:
5114    AcpiOsValidateInterface - no longer used.
5115New Files:
5116    source/components/utilities/utosi.c
5117
5118Re-introduced the support to enable multi-byte transfers for Embedded
5119Controller (EC) operation regions. A reported problem was found to be a
5120bug
5121in the host OS, not in the multi-byte support. Previously, the maximum
5122data
5123size passed to the EC operation region handler was a single byte. There
5124are
5125often EC Fields larger than one byte that need to be transferred, and it
5126is
5127useful for the EC driver to lock these as a single transaction. This
5128change
5129enables single transfers larger than 8 bits. This effectively changes the
5130access to the EC space from ByteAcc to AnyAcc, and will probably require
5131changes to the host OS Embedded Controller driver to enable 16/32/64/256-
5132bit
5133transfers in addition to 8-bit transfers. Alexey Starikovskiy, Lin Ming.
5134
5135Fixed a problem with the prototype for AcpiOsReadPciConfiguration. The
5136prototype in acpiosxf.h had the output value pointer as a (void *).
5137It should be a (UINT64 *). This may affect some host OSL code.
5138
5139Fixed a couple problems with the recently modified Linux makefiles for
5140iASL
5141and AcpiExec. These new makefiles place the generated object files in the
5142local directory so that there can be no collisions between the files that
5143are
5144shared between them that are compiled with different options.
5145
5146Example Code and Data Size: These are the sizes for the OS-independent
5147acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5148debug version of the code includes the debug output trace mechanism and
5149has a
5150much larger code and data size.
5151
5152  Previous Release:
5153    Non-Debug Version:  88.3K Code, 18.8K Data, 107.1K Total
5154    Debug Version:     164.0K Code, 51.5K Data, 215.5K Total
5155  Current Release:
5156    Non-Debug Version:  89.1K Code, 19.0K Data, 108.1K Total
5157    Debug Version:     165.1K Code, 51.9K Data, 217.0K Total
5158
51592) iASL Compiler/Disassembler and Tools:
5160
5161iASL/Disassembler: Added a new option (-da, "disassemble all") to load
5162the
5163namespace from and disassemble an entire group of AML files. Useful for
5164loading all of the AML tables for a given machine (DSDT, SSDT1...SSDTn)
5165and
5166disassembling with one simple command. ACPICA BZ 865. Lin Ming.
5167
5168iASL: Allow multiple invocations of -e option. This change allows
5169multiple
5170uses of -e on the command line: "-e ssdt1.dat -e ssdt2.dat". ACPICA BZ
5171834.
5172Lin Ming.
5173
5174----------------------------------------
517502 July 2010. Summary of changes for version 20100702:
5176
51771) ACPI CA Core Subsystem:
5178
5179Implemented several updates to the recently added GPE reference count
5180support. The model for "wake" GPEs is changing to give the host OS
5181complete
5182control of these GPEs. Eventually, the ACPICA core will not execute any
5183_PRW
5184methods, since the host already must execute them. Also, additional
5185changes
5186were made to help ensure that the reference counts are kept in proper
5187synchronization with reality. Rafael J. Wysocki.
5188
51891) Ensure that GPEs are not enabled twice during initialization.
51902) Ensure that GPE enable masks stay in sync with the reference count.
51913) Do not inadvertently enable GPEs when writing GPE registers.
51924) Remove the internal wake reference counter and add new AcpiGpeWakeup
5193interface. This interface will set or clear individual GPEs for wakeup.
51945) Remove GpeType argument from AcpiEnable and AcpiDisable. These
5195interfaces
5196are now used for "runtime" GPEs only.
5197
5198Changed the behavior of the GPE install/remove handler interfaces. The
5199GPE
5200is
5201no longer disabled during this process, as it was found to cause problems
5202on
5203some machines. Rafael J. Wysocki.
5204
5205Reverted a change introduced in version 20100528 to enable Embedded
5206Controller multi-byte transfers. This change was found to cause problems
5207with
5208Index Fields and possibly Bank Fields. It will be reintroduced when these
5209problems have been resolved.
5210
5211Fixed a problem with references to Alias objects within Package Objects.
5212A
5213reference to an Alias within the definition of a Package was not always
5214resolved properly. Aliases to objects like Processors, Thermal zones,
5215etc.
5216were resolved to the actual object instead of a reference to the object
5217as
5218it
5219should be. Package objects are only allowed to contain integer, string,
5220buffer, package, and reference objects. Redhat bugzilla 608648.
5221
5222Example Code and Data Size: These are the sizes for the OS-independent
5223acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5224debug version of the code includes the debug output trace mechanism and
5225has a
5226much larger code and data size.
5227
5228  Previous Release:
5229    Non-Debug Version:  88.3K Code, 18.8K Data, 107.1K Total
5230    Debug Version:     164.1K Code, 51.5K Data, 215.6K Total
5231  Current Release:
5232    Non-Debug Version:  88.3K Code, 18.8K Data, 107.1K Total
5233    Debug Version:     164.0K Code, 51.5K Data, 215.5K Total
5234
52352) iASL Compiler/Disassembler and Tools:
5236
5237iASL: Implemented a new compiler subsystem to allow definition and
5238compilation of the non-AML ACPI tables such as FADT, MADT, SRAT, etc.
5239These
5240are called "ACPI Data Tables", and the new compiler is the "Data Table
5241Compiler". This compiler is intended to simplify the existing error-prone
5242process of creating these tables for the BIOS, as well as allowing the
5243disassembly, modification, recompilation, and override of existing ACPI
5244data
5245tables. See the iASL User Guide for detailed information.
5246
5247iASL: Implemented a new Template Generator option in support of the new
5248Data
5249Table Compiler. This option will create examples of all known ACPI tables
5250that can be used as the basis for table development. See the iASL
5251documentation and the -T option.
5252
5253Disassembler and headers: Added support for the WDDT ACPI table (Watchdog
5254Descriptor Table).
5255
5256Updated the Linux makefiles for iASL and AcpiExec to place the generated
5257object files in the local directory so that there can be no collisions
5258between the shared files between them that are generated with different
5259options.
5260
5261Added support for Mac OS X in the Unix OSL used for iASL and AcpiExec.
5262Use
5263the #define __APPLE__ to enable this support.
5264
5265----------------------------------------
526628 May 2010. Summary of changes for version 20100528:
5267
5268Note: The ACPI 4.0a specification was released on April 5, 2010 and is
5269available at www.acpi.info. This is primarily an errata release.
5270
52711) ACPI CA Core Subsystem:
5272
5273Undefined ACPI tables: We are looking for the definitions for the
5274following
5275ACPI tables that have been seen in the field: ATKG, IEIT, GSCI.
5276
5277Implemented support to enable multi-byte transfers for Embedded
5278Controller
5279(EC) operation regions. Previously, the maximum data size passed to the
5280EC
5281operation region handler was a single byte. There are often EC Fields
5282larger
5283than one byte that need to be transferred, and it is useful for the EC
5284driver
5285to lock these as a single transaction. This change enables single
5286transfers
5287larger than 8 bits. This effectively changes the access to the EC space
5288from
5289ByteAcc to AnyAcc, and will probably require changes to the host OS
5290Embedded
5291Controller driver to enable 16/32/64/256-bit transfers in addition to 8-
5292bit
5293transfers. Alexey Starikovskiy, Lin Ming
5294
5295Implemented a performance enhancement for namespace search and access.
5296This
5297change enhances the performance of namespace searches and walks by adding
5298a
5299backpointer to the parent in each namespace node. On large namespaces,
5300this
5301change can improve overall ACPI performance by up to 9X. Adding a pointer
5302to
5303each namespace node increases the overall size of the internal namespace
5304by
5305about 5%, since each namespace entry usually consists of both a namespace
5306node and an ACPI operand object. However, this is the first growth of the
5307namespace in ten years. ACPICA bugzilla 817. Alexey Starikovskiy.
5308
5309Implemented a performance optimization that reduces the number of
5310namespace
5311walks. On control method exit, only walk the namespace if the method is
5312known
5313to have created namespace objects outside of its local scope. Previously,
5314the
5315entire namespace was traversed on each control method exit. This change
5316can
5317improve overall ACPI performance by up to 3X. Alexey Starikovskiy, Bob
5318Moore.
5319
5320Added support to truncate I/O addresses to 16 bits for Windows
5321compatibility.
5322Some ASL code has been seen in the field that inadvertently has bits set
5323above bit 15. This feature is optional and is enabled if the BIOS
5324requests
5325any Windows OSI strings. It can also be enabled by the host OS. Matthew
5326Garrett, Bob Moore.
5327
5328Added support to limit the maximum time for the ASL Sleep() operator. To
5329prevent accidental deep sleeps, limit the maximum time that Sleep() will
5330actually sleep. Configurable, the default maximum is two seconds. ACPICA
5331bugzilla 854.
5332
5333Added run-time validation support for the _WDG and_WED Microsoft
5334predefined
5335methods. These objects are defined by "Windows Instrumentation", and are
5336not
5337part of the ACPI spec. ACPICA BZ 860.
5338
5339Expanded all statistic counters used during namespace and device
5340initialization from 16 to 32 bits in order to support very large
5341namespaces.
5342
5343Replaced all instances of %d in printf format specifiers with %u since
5344nearly
5345all integers in ACPICA are unsigned.
5346
5347Fixed the exception namestring for AE_WAKE_ONLY_GPE. Was incorrectly
5348returned
5349as AE_NO_HANDLER.
5350
5351Example Code and Data Size: These are the sizes for the OS-independent
5352acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5353debug version of the code includes the debug output trace mechanism and
5354has a
5355much larger code and data size.
5356
5357  Previous Release:
5358    Non-Debug Version:  88.4K Code, 18.8K Data, 107.2K Total
5359    Debug Version:     164.2K Code, 51.5K Data, 215.7K Total
5360  Current Release:
5361    Non-Debug Version:  88.3K Code, 18.8K Data, 107.1K Total
5362    Debug Version:     164.1K Code, 51.5K Data, 215.6K Total
5363
53642) iASL Compiler/Disassembler and Tools:
5365
5366iASL: Added compiler support for the _WDG and_WED Microsoft predefined
5367methods. These objects are defined by "Windows Instrumentation", and are
5368not
5369part of the ACPI spec. ACPICA BZ 860.
5370
5371AcpiExec: added option to disable the memory tracking mechanism. The -dt
5372option will disable the tracking mechanism, which improves performance
5373considerably.
5374
5375AcpiExec: Restructured the command line options into -d (disable) and -e
5376(enable) options.
5377
5378----------------------------------------
537928 April 2010. Summary of changes for version 20100428:
5380
53811) ACPI CA Core Subsystem:
5382
5383Implemented GPE support for dynamically loaded ACPI tables. For all GPEs,
5384including FADT-based and GPE Block Devices, execute any _PRW methods in
5385the
5386new table, and process any _Lxx/_Exx GPE methods in the new table. Any
5387runtime GPE that is referenced by an _Lxx/_Exx method in the new table is
5388immediately enabled. Handles the FADT-defined GPEs as well as GPE Block
5389Devices. Provides compatibility with other ACPI implementations. Two new
5390files added, evgpeinit.c and evgpeutil.c. ACPICA BZ 833. Lin Ming, Bob
5391Moore.
5392
5393Fixed a regression introduced in version 20100331 within the table
5394manager
5395where initial table loading could fail. This was introduced in the fix
5396for
5397AcpiReallocateRootTable. Also, renamed some of fields in the table
5398manager
5399data structures to clarify their meaning and use.
5400
5401Fixed a possible allocation overrun during internal object copy in
5402AcpiUtCopySimpleObject. The original code did not correctly handle the
5403case
5404where the object to be copied was a namespace node. Lin Ming. ACPICA BZ
5405847.
5406
5407Updated the allocation dump routine, AcpiUtDumpAllocation and fixed a
5408possible access beyond end-of-allocation. Also, now fully validate
5409descriptor
5410(size and type) before output. Lin Ming, Bob Moore. ACPICA BZ 847
5411
5412Example Code and Data Size: These are the sizes for the OS-independent
5413acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5414debug version of the code includes the debug output trace mechanism and
5415has a
5416much larger code and data size.
5417
5418  Previous Release:
5419    Non-Debug Version:  87.9K Code, 18.6K Data, 106.5K Total
5420    Debug Version:     163.5K Code, 51.3K Data, 214.8K Total
5421  Current Release:
5422    Non-Debug Version:  88.4K Code, 18.8K Data, 107.2K Total
5423    Debug Version:     164.2K Code, 51.5K Data, 215.7K Total
5424
54252) iASL Compiler/Disassembler and Tools:
5426
5427iASL: Implemented Min/Max/Len/Gran validation for address resource
5428descriptors. This change implements validation for the address fields
5429that
5430are common to all address-type resource descriptors. These checks are
5431implemented: Checks for valid Min/Max, length within the Min/Max window,
5432valid granularity, Min/Max a multiple of granularity, and _MIF/_MAF as
5433per
5434table 6-40 in the ACPI 4.0a specification. Also split the large
5435aslrestype1.c
5436and aslrestype2.c files into five new files. ACPICA BZ 840.
5437
5438iASL: Added support for the _Wxx predefined names. This support was
5439missing
5440and these names were not recognized by the compiler as valid predefined
5441names. ACPICA BZ 851.
5442
5443iASL: Added an error for all predefined names that are defined to return
5444no
5445value and thus must be implemented as Control Methods. These include all
5446of
5447the _Lxx, _Exx, _Wxx, and _Qxx names, as well as some other miscellaneous
5448names such as _DIS, _INI, _IRC, _OFF, _ON, and _PSx. ACPICA BZ 850, 856.
5449
5450iASL: Implemented the -ts option to emit hex AML data in ASL format, as
5451an
5452ASL Buffer. Allows ACPI tables to be easily included within ASL files, to
5453be
5454dynamically loaded via the Load() operator. Also cleaned up output for
5455the
5456-
5457ta and -tc options. ACPICA BZ 853.
5458
5459Tests: Added a new file with examples of extended iASL error checking.
5460Demonstrates the advanced error checking ability of the iASL compiler.
5461Available at tests/misc/badcode.asl.
5462
5463----------------------------------------
546431 March 2010. Summary of changes for version 20100331:
5465
54661) ACPI CA Core Subsystem:
5467
5468Completed a major update for the GPE support in order to improve support
5469for
5470shared GPEs and to simplify both host OS and ACPICA code. Added a
5471reference
5472count mechanism to support shared GPEs that require multiple device
5473drivers.
5474Several external interfaces have changed. One external interface has been
5475removed. One new external interface was added. Most of the GPE external
5476interfaces now use the GPE spinlock instead of the events mutex (and the
5477Flags parameter for many GPE interfaces has been removed.) See the
5478updated
5479ACPICA Programmer Reference for details. Matthew Garrett, Bob Moore,
5480Rafael
5481Wysocki. ACPICA BZ 831.
5482
5483Changed:
5484    AcpiEnableGpe, AcpiDisableGpe, AcpiClearGpe, AcpiGetGpeStatus
5485Removed:
5486    AcpiSetGpeType
5487New:
5488    AcpiSetGpe
5489
5490Implemented write support for DataTable operation regions. These regions
5491are
5492defined via the DataTableRegion() operator. Previously, only read support
5493was
5494implemented. The ACPI specification allows DataTableRegions to be
5495read/write,
5496however.
5497
5498Implemented a new subsystem option to force a copy of the DSDT to local
5499memory. Optionally copy the entire DSDT to local memory (instead of
5500simply
5501mapping it.) There are some (albeit very rare) BIOSs that corrupt or
5502replace
5503the original DSDT, creating the need for this option. Default is FALSE,
5504do
5505not copy the DSDT.
5506
5507Implemented detection of a corrupted or replaced DSDT. This change adds
5508support to detect a DSDT that has been corrupted and/or replaced from
5509outside
5510the OS (by firmware). This is typically catastrophic for the system, but
5511has
5512been seen on some machines. Once this problem has been detected, the DSDT
5513copy option can be enabled via system configuration. Lin Ming, Bob Moore.
5514
5515Fixed two problems with AcpiReallocateRootTable during the root table
5516copy.
5517When copying the root table to the new allocation, the length used was
5518incorrect. The new size was used instead of the current table size,
5519meaning
5520too much data was copied. Also, the count of available slots for ACPI
5521tables
5522was not set correctly. Alexey Starikovskiy, Bob Moore.
5523
5524Example Code and Data Size: These are the sizes for the OS-independent
5525acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5526debug version of the code includes the debug output trace mechanism and
5527has a
5528much larger code and data size.
5529
5530  Previous Release:
5531    Non-Debug Version:  87.5K Code, 18.4K Data, 105.9K Total
5532    Debug Version:     163.4K Code, 51.1K Data, 214.5K Total
5533  Current Release:
5534    Non-Debug Version:  87.9K Code, 18.6K Data, 106.5K Total
5535    Debug Version:     163.5K Code, 51.3K Data, 214.8K Total
5536
55372) iASL Compiler/Disassembler and Tools:
5538
5539iASL: Implement limited typechecking for values returned from predefined
5540control methods. The type of any returned static (unnamed) object is now
5541validated. For example, Return(1). ACPICA BZ 786.
5542
5543iASL: Fixed a predefined name object verification regression. Fixes a
5544problem
5545introduced in version 20100304. An error is incorrectly generated if a
5546predefined name is declared as a static named object with a value defined
5547using the keywords "Zero", "One", or "Ones". Lin Ming.
5548
5549iASL: Added Windows 7 support for the -g option (get local ACPI tables)
5550by
5551reducing the requested registry access rights. ACPICA BZ 842.
5552
5553Disassembler: fixed a possible fault when generating External()
5554statements.
5555Introduced in commit ae7d6fd: Properly handle externals with parent-
5556prefix
5557(carat). Fixes a string length allocation calculation. Lin Ming.
5558
5559----------------------------------------
556004 March 2010. Summary of changes for version 20100304:
5561
55621) ACPI CA Core Subsystem:
5563
5564Fixed a possible problem with the AML Mutex handling function
5565AcpiExReleaseMutex where the function could fault under the very rare
5566condition when the interpreter has blocked, the interpreter lock is
5567released,
5568the interpreter is then reentered via the same thread, and attempts to
5569acquire an AML mutex that was previously acquired. FreeBSD report 140979.
5570Lin
5571Ming.
5572
5573Implemented additional configuration support for the AML "Debug Object".
5574Output from the debug object can now be enabled via a global variable,
5575AcpiGbl_EnableAmlDebugObject. This will assist with remote machine
5576debugging.
5577This debug output is now available in the release version of ACPICA
5578instead
5579of just the debug version. Also, the entire debug output module can now
5580be
5581configured out of the ACPICA build if desired. One new file added,
5582executer/exdebug.c. Lin Ming, Bob Moore.
5583
5584Added header support for the ACPI MCHI table (Management Controller Host
5585Interface Table). This table was added in ACPI 4.0, but the defining
5586document
5587has only recently become available.
5588
5589Standardized output of integer values for ACPICA warnings/errors. Always
5590use
55910x prefix for hex output, always use %u for unsigned integer decimal
5592output.
5593Affects ACPI_INFO, ACPI_ERROR, ACPI_EXCEPTION, and ACPI_WARNING (about
5594400
5595invocations.) These invocations were converted from the original
5596ACPI_DEBUG_PRINT invocations and were not consistent. ACPICA BZ 835.
5597
5598Example Code and Data Size: These are the sizes for the OS-independent
5599acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5600debug version of the code includes the debug output trace mechanism and
5601has a
5602much larger code and data size.
5603
5604  Previous Release:
5605    Non-Debug Version:  87.1K Code, 18.0K Data, 105.1K Total
5606    Debug Version:     163.5K Code, 50.9K Data, 214.4K Total
5607  Current Release:
5608    Non-Debug Version:  87.5K Code, 18.4K Data, 105.9K Total
5609    Debug Version:     163.4K Code, 51.1K Data, 214.5K Total
5610
56112) iASL Compiler/Disassembler and Tools:
5612
5613iASL: Implemented typechecking support for static (non-control method)
5614predefined named objects that are declared with the Name() operator. For
5615example, the type of this object is now validated to be of type Integer:
5616Name(_BBN, 1). This change migrates the compiler to using the core
5617predefined
5618name table instead of maintaining a local version. Added a new file,
5619aslpredef.c. ACPICA BZ 832.
5620
5621Disassembler: Added support for the ACPI 4.0 MCHI table.
5622
5623----------------------------------------
562421 January 2010. Summary of changes for version 20100121:
5625
56261) ACPI CA Core Subsystem:
5627
5628Added the 2010 copyright to all module headers and signons. This affects
5629virtually every file in the ACPICA core subsystem, the iASL compiler, the
5630tools/utilities, and the test suites.
5631
5632Implemented a change to the AcpiGetDevices interface to eliminate
5633unnecessary
5634invocations of the _STA method. In the case where a specific _HID is
5635requested, do not run _STA until a _HID match is found. This eliminates
5636potentially dozens of _STA calls during a search for a particular
5637device/HID,
5638which in turn can improve boot times. ACPICA BZ 828. Lin Ming.
5639
5640Implemented an additional repair for predefined method return values.
5641Attempt
5642to repair unexpected NULL elements within returned Package objects.
5643Create
5644an
5645Integer of value zero, a NULL String, or a zero-length Buffer as
5646appropriate.
5647ACPICA BZ 818. Lin Ming, Bob Moore.
5648
5649Removed the obsolete ACPI_INTEGER data type. This type was introduced as
5650the
5651code was migrated from ACPI 1.0 (with 32-bit AML integers) to ACPI 2.0
5652(with
565364-bit AML integers). It is now obsolete and this change removes it from
5654the
5655ACPICA code base, replaced by UINT64. The original typedef has been
5656retained
5657for now for compatibility with existing device driver code. ACPICA BZ
5658824.
5659
5660Removed the unused UINT32_STRUCT type, and the obsolete Integer64 field
5661in
5662the parse tree object.
5663
5664Added additional warning options for the gcc-4 generation. Updated the
5665source
5666accordingly. This includes some code restructuring to eliminate
5667unreachable
5668code, elimination of some gotos, elimination of unused return values,
5669some
5670additional casting, and removal of redundant declarations.
5671
5672Example Code and Data Size: These are the sizes for the OS-independent
5673acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5674debug version of the code includes the debug output trace mechanism and
5675has a
5676much larger code and data size.
5677
5678  Previous Release:
5679    Non-Debug Version:  87.0K Code, 18.0K Data, 105.0K Total
5680    Debug Version:     163.4K Code, 50.8K Data, 214.2K Total
5681  Current Release:
5682    Non-Debug Version:  87.1K Code, 18.0K Data, 105.1K Total
5683    Debug Version:     163.5K Code, 50.9K Data, 214.4K Total
5684
56852) iASL Compiler/Disassembler and Tools:
5686
5687No functional changes for this release.
5688
5689----------------------------------------
569014 December 2009. Summary of changes for version 20091214:
5691
56921) ACPI CA Core Subsystem:
5693
5694Enhanced automatic data type conversions for predefined name repairs.
5695This
5696change expands the automatic repairs/conversions for predefined name
5697return
5698values to make Integers, Strings, and Buffers fully interchangeable.
5699Also,
5700a
5701Buffer can be converted to a Package of Integers if necessary. The
5702nsrepair.c
5703module was completely restructured. Lin Ming, Bob Moore.
5704
5705Implemented automatic removal of null package elements during predefined
5706name
5707repairs. This change will automatically remove embedded and trailing NULL
5708package elements from returned package objects that are defined to
5709contain
5710a
5711variable number of sub-packages. The driver is then presented with a
5712package
5713with no null elements to deal with. ACPICA BZ 819.
5714
5715Implemented a repair for the predefined _FDE and _GTM names. The expected
5716return value for both names is a Buffer of 5 DWORDs. This repair fixes
5717two
5718possible problems (both seen in the field), where a package of integers
5719is
5720returned, or a buffer of BYTEs is returned. With assistance from Jung-uk
5721Kim.
5722
5723Implemented additional module-level code support. This change will
5724properly
5725execute module-level code that is not at the root of the namespace (under
5726a
5727Device object, etc.). Now executes the code within the current scope
5728instead
5729of the root. ACPICA BZ 762. Lin Ming.
5730
5731Fixed possible mutex acquisition errors when running _REG methods. Fixes
5732a
5733problem where mutex errors can occur when running a _REG method that is
5734in
5735the same scope as a method-defined operation region or an operation
5736region
5737under a module-level IF block. This type of code is rare, so the problem
5738has
5739not been seen before. ACPICA BZ 826. Lin Ming, Bob Moore.
5740
5741Fixed a possible memory leak during module-level code execution. An
5742object
5743could be leaked for each block of executed module-level code if the
5744interpreter slack mode is enabled This change deletes any implicitly
5745returned
5746object from the module-level code block. Lin Ming.
5747
5748Removed messages for successful predefined repair(s). The repair
5749mechanism
5750was considered too wordy. Now, messages are only unconditionally emitted
5751if
5752the return object cannot be repaired. Existing messages for successful
5753repairs were converted to ACPI_DEBUG_PRINT messages for now. ACPICA BZ
5754827.
5755
5756Example Code and Data Size: These are the sizes for the OS-independent
5757acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5758debug version of the code includes the debug output trace mechanism and
5759has a
5760much larger code and data size.
5761
5762  Previous Release:
5763    Non-Debug Version:  86.6K Code, 18.2K Data, 104.8K Total
5764    Debug Version:     162.7K Code, 50.8K Data, 213.5K Total
5765  Current Release:
5766    Non-Debug Version:  87.0K Code, 18.0K Data, 105.0K Total
5767    Debug Version:     163.4K Code, 50.8K Data, 214.2K Total
5768
57692) iASL Compiler/Disassembler and Tools:
5770
5771iASL: Fixed a regression introduced in 20091112 where intermediate .SRC
5772files
5773were no longer automatically removed at the termination of the compile.
5774
5775acpiexec: Implemented the -f option to specify default region fill value.
5776This option specifies the value used to initialize buffers that simulate
5777operation regions. Default value is zero. Useful for debugging problems
5778that
5779depend on a specific initial value for a region or field.
5780
5781----------------------------------------
578212 November 2009. Summary of changes for version 20091112:
5783
57841) ACPI CA Core Subsystem:
5785
5786Implemented a post-order callback to AcpiWalkNamespace. The existing
5787interface only has a pre-order callback. This change adds an additional
5788parameter for a post-order callback which will be more useful for bus
5789scans.
5790ACPICA BZ 779. Lin Ming. Updated the ACPICA Programmer Reference.
5791
5792Modified the behavior of the operation region memory mapping cache for
5793SystemMemory. Ensure that the memory mappings created for operation
5794regions
5795do not cross 4K page boundaries. Crossing a page boundary while mapping
5796regions can cause kernel warnings on some hosts if the pages have
5797different
5798attributes. Such regions are probably BIOS bugs, and this is the
5799workaround.
5800Linux BZ 14445. Lin Ming.
5801
5802Implemented an automatic repair for predefined methods that must return
5803sorted lists. This change will repair (by sorting) packages returned by
5804_ALR,
5805_PSS, and _TSS. Drivers can now assume that the packages are correctly
5806sorted
5807and do not contain NULL package elements. Adds one new file,
5808namespace/nsrepair2.c. ACPICA BZ 784. Lin Ming, Bob Moore.
5809
5810Fixed a possible fault during predefined name validation if a return
5811Package
5812object contains NULL elements. Also adds a warning if a NULL element is
5813followed by any non-null elements. ACPICA BZ 813, 814. Future enhancement
5814may
5815include repair or removal of all such NULL elements where possible.
5816
5817Implemented additional module-level executable AML code support. This
5818change
5819will execute module-level code that is not at the root of the namespace
5820(under a Device object, etc.) at table load time. Module-level executable
5821AML
5822code has been illegal since ACPI 2.0. ACPICA BZ 762. Lin Ming.
5823
5824Implemented a new internal function to create Integer objects. This
5825function
5826simplifies miscellaneous object creation code. ACPICA BZ 823.
5827
5828Reduced the severity of predefined repair messages, Warning to Info.
5829Since
5830the object was successfully repaired, a warning is too severe. Reduced to
5831an
5832info message for now. These messages may eventually be changed to debug-
5833only.
5834ACPICA BZ 812.
5835
5836Example Code and Data Size: These are the sizes for the OS-independent
5837acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5838debug version of the code includes the debug output trace mechanism and
5839has a
5840much larger code and data size.
5841
5842  Previous Release:
5843    Non-Debug Version:  85.8K Code, 18.0K Data, 103.8K Total
5844    Debug Version:     161.8K Code, 50.6K Data, 212.4K Total
5845  Current Release:
5846    Non-Debug Version:  86.6K Code, 18.2K Data, 104.8K Total
5847    Debug Version:     162.7K Code, 50.8K Data, 213.5K Total
5848
58492) iASL Compiler/Disassembler and Tools:
5850
5851iASL: Implemented Switch() with While(1) so that Break works correctly.
5852This
5853change correctly implements the Switch operator with a surrounding
5854While(1)
5855so that the Break operator works as expected. ACPICA BZ 461. Lin Ming.
5856
5857iASL: Added a message if a package initializer list is shorter than
5858package
5859length. Adds a new remark for a Package() declaration if an initializer
5860list
5861exists, but is shorter than the declared length of the package. Although
5862technically legal, this is probably a coding error and it is seen in the
5863field. ACPICA BZ 815. Lin Ming, Bob Moore.
5864
5865iASL: Fixed a problem where the compiler could fault after the maximum
5866number
5867of errors was reached (200).
5868
5869acpixtract: Fixed a possible warning for pointer cast if the compiler
5870warning
5871level set very high.
5872
5873----------------------------------------
587413 October 2009. Summary of changes for version 20091013:
5875
58761) ACPI CA Core Subsystem:
5877
5878Fixed a problem where an Operation Region _REG method could be executed
5879more
5880than once. If a custom address space handler is installed by the host
5881before
5882the "initialize operation regions" phase of the ACPICA initialization,
5883any
5884_REG methods for that address space could be executed twice. This change
5885fixes the problem. ACPICA BZ 427. Lin Ming.
5886
5887Fixed a possible memory leak for the Scope() ASL operator. When the exact
5888invocation of "Scope(\)" is executed (change scope to root), one internal
5889operand object was leaked. Lin Ming.
5890
5891Implemented a run-time repair for the _MAT predefined method. If the _MAT
5892return value is defined as a Field object in the AML, and the field
5893size is less than or equal to the default width of an integer (32 or
589464),_MAT
5895can incorrectly return an Integer instead of a Buffer. ACPICA now
5896automatically repairs this problem. ACPICA BZ 810.
5897
5898Implemented a run-time repair for the _BIF and _BIX predefined methods.
5899The
5900"OEM Information" field is often incorrectly returned as an Integer with
5901value zero if the field is not supported by the platform. This is due to
5902an
5903ambiguity in the ACPI specification. The field should always be a string.
5904ACPICA now automatically repairs this problem by returning a NULL string
5905within the returned Package. ACPICA BZ 807.
5906
5907Example Code and Data Size: These are the sizes for the OS-independent
5908acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5909debug version of the code includes the debug output trace mechanism and
5910has a
5911much larger code and data size.
5912
5913  Previous Release:
5914    Non-Debug Version:  85.6K Code, 18.0K Data, 103.6K Total
5915    Debug Version:     161.7K Code, 50.9K Data, 212.6K Total
5916  Current Release:
5917    Non-Debug Version:  85.8K Code, 18.0K Data, 103.8K Total
5918    Debug Version:     161.8K Code, 50.6K Data, 212.4K Total
5919
59202) iASL Compiler/Disassembler and Tools:
5921
5922Disassembler: Fixed a problem where references to external symbols that
5923contained one or more parent-prefixes (carats) were not handled
5924correctly,
5925possibly causing a fault. ACPICA BZ 806. Lin Ming.
5926
5927Disassembler: Restructured the code so that all functions that handle
5928external symbols are in a single module. One new file is added,
5929common/dmextern.c.
5930
5931AML Debugger: Added a max count argument for the Batch command (which
5932executes multiple predefined methods within the namespace.)
5933
5934iASL: Updated the compiler documentation (User Reference.) Available at
5935http://www.acpica.org/documentation/. ACPICA BZ 750.
5936
5937AcpiXtract: Updated for Lint and other formatting changes. Close all open
5938files.
5939
5940----------------------------------------
594103 September 2009. Summary of changes for version 20090903:
5942
59431) ACPI CA Core Subsystem:
5944
5945For Windows Vista compatibility, added the automatic execution of an _INI
5946method located at the namespace root (\_INI). This method is executed at
5947table load time. This support is in addition to the automatic execution
5948of
5949\_SB._INI. Lin Ming.
5950
5951Fixed a possible memory leak in the interpreter for AML package objects
5952if
5953the package initializer list is longer than the defined size of the
5954package.
5955This apparently can only happen if the BIOS changes the package size on
5956the
5957fly (seen in a _PSS object), as ASL compilers do not allow this. The
5958interpreter will truncate the package to the defined size (and issue an
5959error
5960message), but previously could leave the extra objects undeleted if they
5961were
5962pre-created during the argument processing (such is the case if the
5963package
5964consists of a number of sub-packages as in the _PSS.) ACPICA BZ 805.
5965
5966Fixed a problem seen when a Buffer or String is stored to itself via ASL.
5967This has been reported in the field. Previously, ACPICA would zero out
5968the
5969buffer/string. Now, the operation is treated as a noop. Provides Windows
5970compatibility. ACPICA BZ 803. Lin Ming.
5971
5972Removed an extraneous error message for ASL constructs of the form
5973Store(LocalX,LocalX) when LocalX is uninitialized. These curious
5974statements
5975are seen in many BIOSs and are once again treated as NOOPs and no error
5976is
5977emitted when they are encountered. ACPICA BZ 785.
5978
5979Fixed an extraneous warning message if a _DSM reserved method returns a
5980Package object. _DSM can return any type of object, so validation on the
5981return type cannot be performed. ACPICA BZ 802.
5982
5983Example Code and Data Size: These are the sizes for the OS-independent
5984acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
5985debug version of the code includes the debug output trace mechanism and
5986has a
5987much larger code and data size.
5988
5989  Previous Release:
5990    Non-Debug Version:  85.5K Code, 18.0K Data, 103.5K Total
5991    Debug Version:     161.6K Code, 50.9K Data, 212.5K Total
5992  Current Release:
5993    Non-Debug Version:  85.6K Code, 18.0K Data, 103.6K Total
5994    Debug Version:     161.7K Code, 50.9K Data, 212.6K Total
5995
59962) iASL Compiler/Disassembler and Tools:
5997
5998iASL: Fixed a problem with the use of the Alias operator and Resource
5999Templates. The correct alias is now constructed and no error is emitted.
6000ACPICA BZ 738.
6001
6002iASL: Implemented the -I option to specify additional search directories
6003for
6004include files. Allows multiple additional search paths for include files.
6005Directories are searched in the order specified on the command line
6006(after
6007the local directory is searched.) ACPICA BZ 800.
6008
6009iASL: Fixed a problem where the full pathname for include files was not
6010emitted for warnings/errors. This caused the IDE support to not work
6011properly. ACPICA BZ 765.
6012
6013iASL: Implemented the -@ option to specify a Windows-style response file
6014containing additional command line options. ACPICA BZ 801.
6015
6016AcpiExec: Added support to load multiple AML files simultaneously (such
6017as
6018a
6019DSDT and multiple SSDTs). Also added support for wildcards within the AML
6020pathname. These features allow all machine tables to be easily loaded and
6021debugged together. ACPICA BZ 804.
6022
6023Disassembler: Added missing support for disassembly of HEST table Error
6024Bank
6025subtables.
6026
6027----------------------------------------
602830 July 2009. Summary of changes for version 20090730:
6029
6030The ACPI 4.0 implementation for ACPICA is complete with this release.
6031
60321) ACPI CA Core Subsystem:
6033
6034ACPI 4.0: Added header file support for all new and changed ACPI tables.
6035Completely new tables are: IBFT, IVRS, MSCT, and WAET. Tables that are
6036new
6037for ACPI 4.0, but have previously been supported in ACPICA are: CPEP,
6038BERT,
6039EINJ, ERST, and HEST. Other newly supported tables are: UEFI and WDAT.
6040There
6041have been some ACPI 4.0 changes to other existing tables. Split the large
6042actbl1.h header into the existing actbl2.h header. ACPICA BZ 774.
6043
6044ACPI 4.0: Implemented predefined name validation for all new names. There
6045are
604631 new names in ACPI 4.0. The predefined validation module was split into
6047two
6048files. The new file is namespace/nsrepair.c. ACPICA BZ 770.
6049
6050Implemented support for so-called "module-level executable code". This is
6051executable AML code that exists outside of any control method and is
6052intended
6053to be executed at table load time. Although illegal since ACPI 2.0, this
6054type
6055of code still exists and is apparently still being created. Blocks of
6056this
6057code are now detected and executed as intended. Currently, the code
6058blocks
6059must exist under either an If, Else, or While construct; these are the
6060typical cases seen in the field. ACPICA BZ 762. Lin Ming.
6061
6062Implemented an automatic dynamic repair for predefined names that return
6063nested Package objects. This applies to predefined names that are defined
6064to
6065return a variable-length Package of sub-packages. If the number of sub-
6066packages is one, BIOS code is occasionally seen that creates a simple
6067single
6068package with no sub-packages. This code attempts to fix the problem by
6069wrapping a new package object around the existing package. These methods
6070can
6071be repaired: _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, and _TSS. ACPICA
6072BZ
6073790.
6074
6075Fixed a regression introduced in 20090625 for the AcpiGetDevices
6076interface.
6077The _HID/_CID matching was broken and no longer matched IDs correctly.
6078ACPICA
6079BZ 793.
6080
6081Fixed a problem with AcpiReset where the reset would silently fail if the
6082register was one of the protected I/O ports. AcpiReset now bypasses the
6083port
6084validation mechanism. This may eventually be driven into the
6085AcpiRead/Write
6086interfaces.
6087
6088Fixed a regression related to the recent update of the AcpiRead/Write
6089interfaces. A sleep/suspend could fail if the optional PM2 Control
6090register
6091does not exist during an attempt to write the Bus Master Arbitration bit.
6092(However, some hosts already delete the code that writes this bit, and
6093the
6094code may in fact be obsolete at this date.) ACPICA BZ 799.
6095
6096Fixed a problem where AcpiTerminate could fault if inadvertently called
6097twice
6098in succession. ACPICA BZ 795.
6099
6100Example Code and Data Size: These are the sizes for the OS-independent
6101acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6102debug version of the code includes the debug output trace mechanism and
6103has a
6104much larger code and data size.
6105
6106  Previous Release:
6107    Non-Debug Version:  84.7K Code, 17.8K Data, 102.5K Total
6108    Debug Version:     160.5K Code, 50.6K Data, 211.1K Total
6109  Current Release:
6110    Non-Debug Version:  85.5K Code, 18.0K Data, 103.5K Total
6111    Debug Version:     161.6K Code, 50.9K Data, 212.5K Total
6112
61132) iASL Compiler/Disassembler and Tools:
6114
6115ACPI 4.0: Implemented disassembler support for all new ACPI tables and
6116changes to existing tables. ACPICA BZ 775.
6117
6118----------------------------------------
611925 June 2009. Summary of changes for version 20090625:
6120
6121The ACPI 4.0 Specification was released on June 16 and is available at
6122www.acpi.info. ACPICA implementation of ACPI 4.0 is underway and will
6123continue for the next few releases.
6124
61251) ACPI CA Core Subsystem:
6126
6127ACPI 4.0: Implemented interpreter support for the IPMI operation region
6128address space. Includes support for bi-directional data buffers and an
6129IPMI
6130address space handler (to be installed by an IPMI device driver.) ACPICA
6131BZ
6132773. Lin Ming.
6133
6134ACPI 4.0: Added changes for existing ACPI tables - FACS and SRAT.
6135Includes
6136support in both the header files and the disassembler.
6137
6138Completed a major update for the AcpiGetObjectInfo external interface.
6139Changes include:
6140 - Support for variable, unlimited length HID, UID, and CID strings.
6141 - Support Processor objects the same as Devices (HID,UID,CID,ADR,STA,
6142etc.)
6143 - Call the _SxW power methods on behalf of a device object.
6144 - Determine if a device is a PCI root bridge.
6145 - Change the ACPI_BUFFER parameter to ACPI_DEVICE_INFO.
6146These changes will require an update to all callers of this interface.
6147See
6148the updated ACPICA Programmer Reference for details. One new source file
6149has
6150been added - utilities/utids.c. ACPICA BZ 368, 780.
6151
6152Updated the AcpiRead and AcpiWrite external interfaces to support 64-bit
6153transfers. The Value parameter has been extended from 32 bits to 64 bits
6154in
6155order to support new ACPI 4.0 tables. These changes will require an
6156update
6157to
6158all callers of these interfaces. See the ACPICA Programmer Reference for
6159details. ACPICA BZ 768.
6160
6161Fixed several problems with AcpiAttachData. The handler was not invoked
6162when
6163the host node was deleted. The data sub-object was not automatically
6164deleted
6165when the host node was deleted. The interface to the handler had an
6166unused
6167parameter, this was removed. ACPICA BZ 778.
6168
6169Enhanced the function that dumps ACPI table headers. All non-printable
6170characters in the string fields are now replaced with '?' (Signature,
6171OemId,
6172OemTableId, and CompilerId.) ACPI tables with non-printable characters in
6173these fields are occasionally seen in the field. ACPICA BZ 788.
6174
6175Fixed a problem with predefined method repair code where the code that
6176attempts to repair/convert an object of incorrect type is only executed
6177on
6178the first time the predefined method is called. The mechanism that
6179disables
6180warnings on subsequent calls was interfering with the repair mechanism.
6181ACPICA BZ 781.
6182
6183Fixed a possible memory leak in the predefined validation/repair code
6184when
6185a
6186buffer is automatically converted to an expected string object.
6187
6188Removed obsolete 16-bit files from the distribution and from the current
6189git
6190tree head. ACPICA BZ 776.
6191
6192Example Code and Data Size: These are the sizes for the OS-independent
6193acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6194debug version of the code includes the debug output trace mechanism and
6195has a
6196much larger code and data size.
6197
6198  Previous Release:
6199    Non-Debug Version:  83.4K Code, 17.5K Data, 100.9K Total
6200    Debug Version:     158.9K Code, 50.0K Data, 208.9K Total
6201  Current Release:
6202    Non-Debug Version:  84.7K Code, 17.8K Data, 102.5K Total
6203    Debug Version:     160.5K Code, 50.6K Data, 211.1K Total
6204
62052) iASL Compiler/Disassembler and Tools:
6206
6207ACPI 4.0: iASL and Disassembler - implemented support for the new IPMI
6208operation region keyword. ACPICA BZ 771, 772. Lin Ming.
6209
6210ACPI 4.0: iASL - implemented compile-time validation support for all new
6211predefined names and control methods (31 total). ACPICA BZ 769.
6212
6213----------------------------------------
621421 May 2009. Summary of changes for version 20090521:
6215
62161) ACPI CA Core Subsystem:
6217
6218Disabled the preservation of the SCI enable bit in the PM1 control
6219register.
6220The SCI enable bit (bit 0, SCI_EN) is defined by the ACPI specification
6221to
6222be
6223a "preserved" bit - "OSPM always preserves this bit position", section
62244.7.3.2.1. However, some machines fail if this bit is in fact preserved
6225because the bit needs to be explicitly set by the OS as a workaround. No
6226machines fail if the bit is not preserved. Therefore, ACPICA no longer
6227attempts to preserve this bit.
6228
6229Fixed a problem in AcpiRsGetPciRoutingTableLength where an invalid or
6230incorrectly formed _PRT package could cause a fault. Added validation to
6231ensure that each package element is actually a sub-package.
6232
6233Implemented a new interface to install or override a single control
6234method,
6235AcpiInstallMethod. This interface is useful when debugging in order to
6236repair
6237an existing method or to install a missing method without having to
6238override
6239the entire ACPI table. See the ACPICA Programmer Reference for use and
6240examples. Lin Ming, Bob Moore.
6241
6242Fixed several reference count issues with the DdbHandle object that is
6243created from a Load or LoadTable operator. Prevent premature deletion of
6244the
6245object. Also, mark the object as invalid once the table has been
6246unloaded.
6247This is needed because the handle itself may not be deleted after the
6248table
6249unload, depending on whether it has been stored in a named object by the
6250caller. Lin Ming.
6251
6252Fixed a problem with Mutex Sync Levels. Fixed a problem where if multiple
6253mutexes of the same sync level are acquired but then not released in
6254strict
6255opposite order, the internally maintained Current Sync Level becomes
6256confused
6257and can cause subsequent execution errors. ACPICA BZ 471.
6258
6259Changed the allowable release order for ASL mutex objects. The ACPI 4.0
6260specification has been changed to make the SyncLevel for mutex objects
6261more
6262useful. When releasing a mutex, the SyncLevel of the mutex must now be
6263the
6264same as the current sync level. This makes more sense than the previous
6265rule
6266(SyncLevel less than or equal). This change updates the code to match the
6267specification.
6268
6269Fixed a problem with the local version of the AcpiOsPurgeCache function.
6270The
6271(local) cache must be locked during all cache object deletions. Andrew
6272Baumann.
6273
6274Updated the Load operator to use operation region interfaces. This
6275replaces
6276direct memory mapping with region access calls. Now, all region accesses
6277go
6278through the installed region handler as they should.
6279
6280Simplified and optimized the NsGetNextNode function. Reduced parameter
6281count
6282and reduced code for this frequently used function.
6283
6284Example Code and Data Size: These are the sizes for the OS-independent
6285acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6286debug version of the code includes the debug output trace mechanism and
6287has a
6288much larger code and data size.
6289
6290  Previous Release:
6291    Non-Debug Version:  82.8K Code, 17.5K Data, 100.3K Total
6292    Debug Version:     158.0K Code, 49.9K Data, 207.9K Total
6293  Current Release:
6294    Non-Debug Version:  83.4K Code, 17.5K Data, 100.9K Total
6295    Debug Version:     158.9K Code, 50.0K Data, 208.9K Total
6296
62972) iASL Compiler/Disassembler and Tools:
6298
6299Disassembler: Fixed some issues with DMAR, HEST, MADT tables. Some
6300problems
6301with sub-table disassembly and handling invalid sub-tables. Attempt
6302recovery
6303after an invalid sub-table ID.
6304
6305----------------------------------------
630622 April 2009. Summary of changes for version 20090422:
6307
63081) ACPI CA Core Subsystem:
6309
6310Fixed a compatibility issue with the recently released I/O port
6311protection
6312mechanism. For windows compatibility, 1) On a port protection violation,
6313simply ignore the request and do not return an exception (allow the
6314control
6315method to continue execution.) 2) If only part of the request overlaps a
6316protected port, read/write the individual ports that are not protected.
6317Linux
6318BZ 13036. Lin Ming
6319
6320Enhanced the execution of the ASL/AML BreakPoint operator so that it
6321actually
6322breaks into the AML debugger if the debugger is present. This matches the
6323ACPI-defined behavior.
6324
6325Fixed several possible warnings related to the use of the configurable
6326ACPI_THREAD_ID. This type can now be configured as either an integer or a
6327pointer with no warnings. Also fixes several warnings in printf-like
6328statements for the 64-bit build when the type is configured as a pointer.
6329ACPICA BZ 766, 767.
6330
6331Fixed a number of possible warnings when compiling with gcc 4+ (depending
6332on
6333warning options.) Examples include printf formats, aliasing, unused
6334globals,
6335missing prototypes, missing switch default statements, use of non-ANSI
6336library functions, use of non-ANSI constructs. See generate/unix/Makefile
6337for
6338a list of warning options used with gcc 3 and 4. ACPICA BZ 735.
6339
6340Example Code and Data Size: These are the sizes for the OS-independent
6341acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6342debug version of the code includes the debug output trace mechanism and
6343has a
6344much larger code and data size.
6345
6346  Previous Release:
6347    Non-Debug Version:  82.6K Code, 17.6K Data, 100.2K Total
6348    Debug Version:     157.7K Code, 49.9K Data, 207.6K Total
6349  Current Release:
6350    Non-Debug Version:  82.8K Code, 17.5K Data, 100.3K Total
6351    Debug Version:     158.0K Code, 49.9K Data, 207.9K Total
6352
63532) iASL Compiler/Disassembler and Tools:
6354
6355iASL: Fixed a generation warning from Bison 2.3 and fixed several
6356warnings
6357on
6358the 64-bit build.
6359
6360iASL: Fixed a problem where the Unix/Linux versions of the compiler could
6361not
6362correctly digest Windows/DOS formatted files (with CR/LF).
6363
6364iASL: Added a new option for "quiet mode" (-va) that produces only the
6365compilation summary, not individual errors and warnings. Useful for large
6366batch compilations.
6367
6368AcpiExec: Implemented a new option (-z) to enable a forced
6369semaphore/mutex
6370timeout that can be used to detect hang conditions during execution of
6371AML
6372code (includes both internal semaphores and AML-defined mutexes and
6373events.)
6374
6375Added new makefiles for the generation of acpica in a generic unix-like
6376environment. These makefiles are intended to generate the acpica tools
6377and
6378utilities from the original acpica git source tree structure.
6379
6380Test Suites: Updated and cleaned up the documentation files. Updated the
6381copyrights to 2009, affecting all source files. Use the new version of
6382iASL
6383with quiet mode. Increased the number of available semaphores in the
6384Windows
6385OSL, allowing the aslts to execute fully on Windows. For the Unix OSL,
6386added
6387an alternate implementation of the semaphore timeout to allow aslts to
6388execute fully on Cygwin.
6389
6390----------------------------------------
639120 March 2009. Summary of changes for version 20090320:
6392
63931) ACPI CA Core Subsystem:
6394
6395Fixed a possible race condition between AcpiWalkNamespace and dynamic
6396table
6397unloads. Added a reader/writer locking mechanism to allow multiple
6398concurrent
6399namespace walks (readers), but block a dynamic table unload until it can
6400gain
6401exclusive write access to the namespace. This fixes a problem where a
6402table
6403unload could (possibly catastrophically) delete the portion of the
6404namespace
6405that is currently being examined by a walk. Adds a new file, utlock.c,
6406that
6407implements the reader/writer lock mechanism. ACPICA BZ 749.
6408
6409Fixed a regression introduced in version 20090220 where a change to the
6410FADT
6411handling could cause the ACPICA subsystem to access non-existent I/O
6412ports.
6413
6414Modified the handling of FADT register and table (FACS/DSDT) addresses.
6415The
6416FADT can contain both 32-bit and 64-bit versions of these addresses.
6417Previously, the 64-bit versions were favored, meaning that if both 32 and
641864
6419versions were valid, but not equal, the 64-bit version was used. This was
6420found to cause some machines to fail. Now, in this case, the 32-bit
6421version
6422is used instead. This now matches the Windows behavior.
6423
6424Implemented a new mechanism to protect certain I/O ports. Provides
6425Microsoft
6426compatibility and protects the standard PC I/O ports from access via AML
6427code. Adds a new file, hwvalid.c
6428
6429Fixed a possible extraneous warning message from the FADT support. The
6430message warns of a 32/64 length mismatch between the legacy and GAS
6431definitions for a register.
6432
6433Removed the obsolete AcpiOsValidateAddress OSL interface. This interface
6434is
6435made obsolete by the port protection mechanism above. It was previously
6436used
6437to validate the entire address range of an operation region, which could
6438be
6439incorrect if the range included illegal ports, but fields within the
6440operation region did not actually access those ports. Validation is now
6441performed on a per-field basis instead of the entire region.
6442
6443Modified the handling of the PM1 Status Register ignored bit (bit 11.)
6444Ignored bits must be "preserved" according to the ACPI spec. Usually,
6445this
6446means a read/modify/write when writing to the register. However, for
6447status
6448registers, writing a one means clear the event. Writing a zero means
6449preserve
6450the event (do not clear.) This behavior is clarified in the ACPI 4.0
6451spec,
6452and the ACPICA code now simply always writes a zero to the ignored bit.
6453
6454Modified the handling of ignored bits for the PM1 A/B Control Registers.
6455As
6456per the ACPI specification, for the control registers, preserve
6457(read/modify/write) all bits that are defined as either reserved or
6458ignored.
6459
6460Updated the handling of write-only bits in the PM1 A/B Control Registers.
6461When reading the register, zero the write-only bits as per the ACPI spec.
6462ACPICA BZ 443. Lin Ming.
6463
6464Removed "Linux" from the list of supported _OSI strings. Linux no longer
6465wants to reply true to this request. The Windows strings are the only
6466paths
6467through the AML that are tested and known to work properly.
6468
6469  Previous Release:
6470    Non-Debug Version:  82.0K Code, 17.5K Data,  99.5K Total
6471    Debug Version:     156.9K Code, 49.8K Data, 206.7K Total
6472  Current Release:
6473    Non-Debug Version:  82.6K Code, 17.6K Data, 100.2K Total
6474    Debug Version:     157.7K Code, 49.9K Data, 207.6K Total
6475
64762) iASL Compiler/Disassembler and Tools:
6477
6478Acpiexec: Split the large aeexec.c file into two new files, aehandlers.c
6479and
6480aetables.c
6481
6482----------------------------------------
648320 February 2009. Summary of changes for version 20090220:
6484
64851) ACPI CA Core Subsystem:
6486
6487Optimized the ACPI register locking. Removed locking for reads from the
6488ACPI
6489bit registers in PM1 Status, Enable, Control, and PM2 Control. The lock
6490is
6491not required when reading the single-bit registers. The
6492AcpiGetRegisterUnlocked function is no longer needed and has been
6493removed.
6494This will improve performance for reads on these registers. ACPICA BZ
6495760.
6496
6497Fixed the parameter validation for AcpiRead/Write. Now return
6498AE_BAD_PARAMETER if the input register pointer is null, and
6499AE_BAD_ADDRESS
6500if
6501the register has an address of zero. Previously, these cases simply
6502returned
6503AE_OK. For optional registers such as PM1B status/enable/control, the
6504caller
6505should check for a valid register address before calling. ACPICA BZ 748.
6506
6507Renamed the external ACPI bit register access functions. Renamed
6508AcpiGetRegister and AcpiSetRegister to clarify the purpose of these
6509functions. The new names are AcpiReadBitRegister and
6510AcpiWriteBitRegister.
6511Also, restructured the code for these functions by simplifying the code
6512path
6513and condensing duplicate code to reduce code size.
6514
6515Added new functions to transparently handle the possibly split PM1 A/B
6516registers. AcpiHwReadMultiple and AcpiHwWriteMultiple. These two
6517functions
6518now handle the split registers for PM1 Status, Enable, and Control.
6519ACPICA
6520BZ
6521746.
6522
6523Added a function to handle the PM1 control registers,
6524AcpiHwWritePm1Control.
6525This function writes both of the PM1 control registers (A/B). These
6526registers
6527are different than the PM1 A/B status and enable registers in that
6528different
6529values can be written to the A/B registers. Most notably, the SLP_TYP
6530bits
6531can be different, as per the values returned from the _Sx predefined
6532methods.
6533
6534Removed an extra register write within AcpiHwClearAcpiStatus. This
6535function
6536was writing an optional PM1B status register twice. The existing call to
6537the
6538low-level AcpiHwRegisterWrite automatically handles a possibly split PM1
6539A/B
6540register. ACPICA BZ 751.
6541
6542Split out the PM1 Status registers from the FADT. Added new globals for
6543these
6544registers (A/B), similar to the way the PM1 Enable registers are handled.
6545Instead of overloading the FADT Event Register blocks. This makes the
6546code
6547clearer and less prone to error.
6548
6549Fixed the warning message for when the platform contains too many ACPI
6550tables
6551for the default size of the global root table data structure. The
6552calculation
6553for the truncation value was incorrect.
6554
6555Removed the ACPI_GET_OBJECT_TYPE macro. Removed all instances of this
6556obsolete macro, since it is now a simple reference to ->common.type.
6557There
6558were about 150 invocations of the macro across 41 files. ACPICA BZ 755.
6559
6560Removed the redundant ACPI_BITREG_SLEEP_TYPE_B. This type is the same as
6561TYPE_A. Removed this and all related instances. Renamed SLEEP_TYPE_A to
6562simply SLEEP_TYPE. ACPICA BZ 754.
6563
6564Conditionally compile the AcpiSetFirmwareWakingVector64 function. This
6565function is only needed on 64-bit host operating systems and is thus not
6566included for 32-bit hosts.
6567
6568Debug output: print the input and result for invocations of the _OSI
6569reserved
6570control method via the ACPI_LV_INFO debug level. Also, reduced some of
6571the
6572verbosity of this debug level. Len Brown.
6573
6574Example Code and Data Size: These are the sizes for the OS-independent
6575acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6576debug version of the code includes the debug output trace mechanism and
6577has a
6578much larger code and data size.
6579
6580  Previous Release:
6581    Non-Debug Version:  82.3K Code, 17.5K Data,  99.8K Total
6582    Debug Version:     157.3K Code, 49.8K Data, 207.1K Total
6583  Current Release:
6584    Non-Debug Version:  82.0K Code, 17.5K Data,  99.5K Total
6585    Debug Version:     156.9K Code, 49.8K Data, 206.7K Total
6586
65872) iASL Compiler/Disassembler and Tools:
6588
6589Disassembler: Decode the FADT PM_Profile field. Emit ascii names for the
6590various legal performance profiles.
6591
6592----------------------------------------
659323 January 2009. Summary of changes for version 20090123:
6594
65951) ACPI CA Core Subsystem:
6596
6597Added the 2009 copyright to all module headers and signons. This affects
6598virtually every file in the ACPICA core subsystem, the iASL compiler, and
6599the tools/utilities.
6600
6601Implemented a change to allow the host to override any ACPI table,
6602including
6603dynamically loaded tables. Previously, only the DSDT could be replaced by
6604the
6605host. With this change, the AcpiOsTableOverride interface is called for
6606each
6607table found in the RSDT/XSDT during ACPICA initialization, and also
6608whenever
6609a table is dynamically loaded via the AML Load operator.
6610
6611Updated FADT flag definitions, especially the Boot Architecture flags.
6612
6613Debugger: For the Find command, automatically pad the input ACPI name
6614with
6615underscores if the name is shorter than 4 characters. This enables a
6616match
6617with the actual namespace entry which is itself padded with underscores.
6618
6619Example Code and Data Size: These are the sizes for the OS-independent
6620acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6621debug version of the code includes the debug output trace mechanism and
6622has a
6623much larger code and data size.
6624
6625  Previous Release:
6626    Non-Debug Version:  82.3K Code, 17.4K Data,  99.7K Total
6627    Debug Version:     157.1K Code, 49.7K Data, 206.8K Total
6628  Current Release:
6629    Non-Debug Version:  82.3K Code, 17.5K Data,  99.8K Total
6630    Debug Version:     157.3K Code, 49.8K Data, 207.1K Total
6631
66322) iASL Compiler/Disassembler and Tools:
6633
6634Fix build error under Bison-2.4.
6635
6636Dissasembler: Enhanced FADT support. Added decoding of the Boot
6637Architecture
6638flags. Now decode all flags, regardless of the FADT version. Flag output
6639includes the FADT version which first defined each flag.
6640
6641The iASL -g option now dumps the RSDT to a file (in addition to the FADT
6642and
6643DSDT). Windows only.
6644
6645----------------------------------------
664604 December 2008. Summary of changes for version 20081204:
6647
66481) ACPI CA Core Subsystem:
6649
6650The ACPICA Programmer Reference has been completely updated and revamped
6651for
6652this release. This includes updates to the external interfaces, OSL
6653interfaces, the overview sections, and the debugger reference.
6654
6655Several new ACPICA interfaces have been implemented and documented in the
6656programmer reference:
6657AcpiReset - Writes the reset value to the FADT-defined reset register.
6658AcpiDisableAllGpes - Disable all available GPEs.
6659AcpiEnableAllRuntimeGpes - Enable all available runtime GPEs.
6660AcpiGetGpeDevice - Get the GPE block device associated with a GPE.
6661AcpiGbl_CurrentGpeCount - Tracks the current number of available GPEs.
6662AcpiRead - Low-level read ACPI register (was HwLowLevelRead.)
6663AcpiWrite - Low-level write ACPI register (was HwLowLevelWrite.)
6664
6665Most of the public ACPI hardware-related interfaces have been moved to a
6666new
6667file, components/hardware/hwxface.c
6668
6669Enhanced the FADT parsing and low-level ACPI register access: The ACPI
6670register lengths within the FADT are now used, and the low level ACPI
6671register access no longer hardcodes the ACPI register lengths. Given that
6672there may be some risk in actually trusting the FADT register lengths, a
6673run-
6674time option was added to fall back to the default hardcoded lengths if
6675the
6676FADT proves to contain incorrect values - UseDefaultRegisterWidths. This
6677option is set to true for now, and a warning is issued if a suspicious
6678FADT
6679register length is overridden with the default value.
6680
6681Fixed a reference count issue in NsRepairObject. This problem was
6682introduced
6683in version 20081031 as part of a fix to repair Buffer objects within
6684Packages. Lin Ming.
6685
6686Added semaphore support to the Linux/Unix application OS-services layer
6687(OSL). ACPICA BZ 448. Lin Ming.
6688
6689Added the ACPI_MUTEX_TYPE configuration option to select whether mutexes
6690will
6691be implemented in the OSL, or will binary semaphores be used instead.
6692
6693Example Code and Data Size: These are the sizes for the OS-independent
6694acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6695debug version of the code includes the debug output trace mechanism and
6696has a
6697much larger code and data size.
6698
6699  Previous Release:
6700    Non-Debug Version:  81.7K Code, 17.3K Data,  99.0K Total
6701    Debug Version:     156.4K Code, 49.4K Data, 205.8K Total
6702  Current Release:
6703    Non-Debug Version:  82.3K Code, 17.4K Data,  99.7K Total
6704    Debug Version:     157.1K Code, 49.7K Data, 206.8K Total
6705
67062) iASL Compiler/Disassembler and Tools:
6707
6708iASL: Completed the '-e' option to include additional ACPI tables in
6709order
6710to
6711aid with disassembly and External statement generation. ACPICA BZ 742.
6712Lin
6713Ming.
6714
6715iASL: Removed the "named object in while loop" error. The compiler cannot
6716determine how many times a loop will execute. ACPICA BZ 730.
6717
6718Disassembler: Implemented support for FADT revision 2 (MS extension).
6719ACPICA
6720BZ 743.
6721
6722Disassembler: Updates for several ACPI data tables (HEST, EINJ, and
6723MCFG).
6724
6725----------------------------------------
672631 October 2008. Summary of changes for version 20081031:
6727
67281) ACPI CA Core Subsystem:
6729
6730Restructured the ACPICA header files into public/private. acpi.h now
6731includes
6732only the "public" acpica headers. All other acpica headers are "private"
6733and
6734should not be included by acpica users. One new file, accommon.h is used
6735to
6736include the commonly used private headers for acpica code generation.
6737Future
6738plans include moving all private headers to a new subdirectory.
6739
6740Implemented an automatic Buffer->String return value conversion for
6741predefined ACPI methods. For these methods (such as _BIF), added
6742automatic
6743conversion for return objects that are required to be a String, but a
6744Buffer
6745was found instead. This can happen when reading string battery data from
6746an
6747operation region, because it used to be difficult to convert the data
6748from
6749buffer to string from within the ASL. Ensures that the host OS is
6750provided
6751with a valid null-terminated string. Linux BZ 11822.
6752
6753Updated the FACS waking vector interfaces. Split
6754AcpiSetFirmwareWakingVector
6755into two: one for the 32-bit vector, another for the 64-bit vector. This
6756is
6757required because the host OS must setup the wake much differently for
6758each
6759vector (real vs. protected mode, etc.) and the interface itself should
6760not
6761be
6762deciding which vector to use. Also, eliminated the
6763GetFirmwareWakingVector
6764interface, as it served no purpose (only the firmware reads the vector,
6765OS
6766only writes the vector.) ACPICA BZ 731.
6767
6768Implemented a mechanism to escape infinite AML While() loops. Added a
6769loop
6770counter to force exit from AML While loops if the count becomes too
6771large.
6772This can occur in poorly written AML when the hardware does not respond
6773within a while loop and the loop does not implement a timeout. The
6774maximum
6775loop count is configurable. A new exception code is returned when a loop
6776is
6777broken, AE_AML_INFINITE_LOOP. Alexey Starikovskiy, Bob Moore.
6778
6779Optimized the execution of AML While loops. Previously, a control state
6780object was allocated and freed for each execution of the loop. The
6781optimization is to simply reuse the control state for each iteration.
6782This
6783speeds up the raw loop execution time by about 5%.
6784
6785Enhanced the implicit return mechanism. For Windows compatibility, return
6786an
6787implicit integer of value zero for methods that contain no executable
6788code.
6789Such methods are seen in the field as stubs (presumably), and can cause
6790drivers to fail if they expect a return value. Lin Ming.
6791
6792Allow multiple backslashes as root prefixes in namepaths. In a fully
6793qualified namepath, allow multiple backslash prefixes. This can happen
6794(and
6795is seen in the field) because of the use of a double-backslash in strings
6796(since backslash is the escape character) causing confusion. ACPICA BZ
6797739
6798Lin Ming.
6799
6800Emit a warning if two different FACS or DSDT tables are discovered in the
6801FADT. Checks if there are two valid but different addresses for the FACS
6802and
6803DSDT within the FADT (mismatch between the 32-bit and 64-bit fields.)
6804
6805Consolidated the method argument count validation code. Merged the code
6806that
6807validates control method argument counts into the predefined validation
6808module. Eliminates possible multiple warnings for incorrect argument
6809counts.
6810
6811Implemented ACPICA example code. Includes code for ACPICA initialization,
6812handler installation, and calling a control method. Available at
6813source/tools/examples.
6814
6815Added a global pointer for FACS table to simplify internal FACS access.
6816Use
6817the global pointer instead of using AcpiGetTableByIndex for each FACS
6818access.
6819This simplifies the code for the Global Lock and the Firmware Waking
6820Vector(s).
6821
6822Example Code and Data Size: These are the sizes for the OS-independent
6823acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6824debug version of the code includes the debug output trace mechanism and
6825has a
6826much larger code and data size.
6827
6828  Previous Release:
6829    Non-Debug Version:  81.2K Code, 17.0K Data,  98.2K Total
6830    Debug Version:     155.8K Code, 49.1K Data, 204.9K Total
6831  Current Release:
6832    Non-Debug Version:  81.7K Code, 17.3K Data,  99.0K Total
6833    Debug Version:     156.4K Code, 49.4K Data, 205.8K Total
6834
68352) iASL Compiler/Disassembler and Tools:
6836
6837iASL: Improved disassembly of external method calls. Added the -e option
6838to
6839allow the inclusion of additional ACPI tables to help with the
6840disassembly
6841of
6842method invocations and the generation of external declarations during the
6843disassembly. Certain external method invocations cannot be disassembled
6844properly without the actual declaration of the method. Use the -e option
6845to
6846include the table where the external method(s) are actually declared.
6847Most
6848useful for disassembling SSDTs that make method calls back to the master
6849DSDT. Lin Ming. Example: To disassemble an SSDT with calls to DSDT:  iasl
6850-d
6851-e dsdt.aml ssdt1.aml
6852
6853iASL: Fix to allow references to aliases within ASL namepaths. Fixes a
6854problem where the use of an alias within a namepath would result in a not
6855found error or cause the compiler to fault. Also now allows forward
6856references from the Alias operator itself. ACPICA BZ 738.
6857
6858----------------------------------------
685926 September 2008. Summary of changes for version 20080926:
6860
68611) ACPI CA Core Subsystem:
6862
6863Designed and implemented a mechanism to validate predefined ACPI methods
6864and
6865objects. This code validates the predefined ACPI objects (objects whose
6866names
6867start with underscore) that appear in the namespace, at the time they are
6868evaluated. The argument count and the type of the returned object are
6869validated against the ACPI specification. The purpose of this validation
6870is
6871to detect problems with the BIOS-implemented predefined ACPI objects
6872before
6873the results are returned to the ACPI-related drivers. Future enhancements
6874may
6875include actual repair of incorrect return objects where possible. Two new
6876files are nspredef.c and acpredef.h.
6877
6878Fixed a fault in the AML parser if a memory allocation fails during the
6879Op
6880completion routine AcpiPsCompleteThisOp. Lin Ming. ACPICA BZ 492.
6881
6882Fixed an issue with implicit return compatibility. This change improves
6883the
6884implicit return mechanism to be more compatible with the MS interpreter.
6885Lin
6886Ming, ACPICA BZ 349.
6887
6888Implemented support for zero-length buffer-to-string conversions. Allow
6889zero
6890length strings during interpreter buffer-to-string conversions. For
6891example,
6892during the ToDecimalString and ToHexString operators, as well as implicit
6893conversions. Fiodor Suietov, ACPICA BZ 585.
6894
6895Fixed two possible memory leaks in the error exit paths of
6896AcpiUtUpdateObjectReference and AcpiUtWalkPackageTree. These functions
6897are
6898similar in that they use a stack of state objects in order to eliminate
6899recursion. The stack must be fully unwound and deallocated if an error
6900occurs. Lin Ming. ACPICA BZ 383.
6901
6902Removed the unused ACPI_BITREG_WAKE_ENABLE definition and entry in the
6903global
6904ACPI register table. This bit does not exist and is unused. Lin Ming, Bob
6905Moore ACPICA BZ 442.
6906
6907Removed the obsolete version number in module headers. Removed the
6908"$Revision" number that appeared in each module header. This version
6909number
6910was useful under SourceSafe and CVS, but has no meaning under git. It is
6911not
6912only incorrect, it could also be misleading.
6913
6914Example Code and Data Size: These are the sizes for the OS-independent
6915acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6916debug version of the code includes the debug output trace mechanism and
6917has a
6918much larger code and data size.
6919
6920  Previous Release:
6921    Non-Debug Version:  79.7K Code, 16.4K Data,  96.1K Total
6922    Debug Version:     153.7K Code, 48.2K Data, 201.9K Total
6923  Current Release:
6924    Non-Debug Version:  81.2K Code, 17.0K Data,  98.2K Total
6925    Debug Version:     155.8K Code, 49.1K Data, 204.9K Total
6926
6927----------------------------------------
692829 August 2008. Summary of changes for version 20080829:
6929
69301) ACPI CA Core Subsystem:
6931
6932Completed a major cleanup of the internal ACPI_OPERAND_OBJECT of type
6933Reference. Changes include the elimination of cheating on the Object
6934field
6935for the DdbHandle subtype, addition of a reference class field to
6936differentiate the various reference types (instead of an AML opcode), and
6937the
6938cleanup of debug output for this object. Lin Ming, Bob Moore. BZ 723
6939
6940Reduce an error to a warning for an incorrect method argument count.
6941Previously aborted with an error if too few arguments were passed to a
6942control method via the external ACPICA interface. Now issue a warning
6943instead
6944and continue. Handles the case where the method inadvertently declares
6945too
6946many arguments, but does not actually use the extra ones. Applies mainly
6947to
6948the predefined methods. Lin Ming. Linux BZ 11032.
6949
6950Disallow the evaluation of named object types with no intrinsic value.
6951Return
6952AE_TYPE for objects that have no value and therefore evaluation is
6953undefined:
6954Device, Event, Mutex, Region, Thermal, and Scope. Previously, evaluation
6955of
6956these types were allowed, but an exception would be generated at some
6957point
6958during the evaluation. Now, the error is generated up front.
6959
6960Fixed a possible memory leak in the AcpiNsGetExternalPathname function
6961(nsnames.c). Fixes a leak in the error exit path.
6962
6963Removed the obsolete debug levels ACPI_DB_WARN and ACPI_DB_ERROR. These
6964debug
6965levels were made obsolete by the ACPI_WARNING, ACPI_ERROR, and
6966ACPI_EXCEPTION
6967interfaces. Also added ACPI_DB_EVENTS to correspond with the existing
6968ACPI_LV_EVENTS.
6969
6970Removed obsolete and/or unused exception codes from the acexcep.h header.
6971There is the possibility that certain device drivers may be affected if
6972they
6973use any of these exceptions.
6974
6975The ACPICA documentation has been added to the public git source tree,
6976under
6977acpica/documents. Included are the ACPICA programmer reference, the iASL
6978compiler reference, and the changes.txt release logfile.
6979
6980Example Code and Data Size: These are the sizes for the OS-independent
6981acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6982debug version of the code includes the debug output trace mechanism and
6983has a
6984much larger code and data size.
6985
6986  Previous Release:
6987    Non-Debug Version:  79.7K Code, 16.4K Data,  96.1K Total
6988    Debug Version:     153.9K Code, 48.4K Data, 202.3K Total
6989  Current Release:
6990    Non-Debug Version:  79.7K Code, 16.4K Data,  96.1K Total
6991    Debug Version:     153.7K Code, 48.2K Data, 201.9K Total
6992
69932) iASL Compiler/Disassembler and Tools:
6994
6995Allow multiple argument counts for the predefined _SCP method. ACPI 3.0
6996defines _SCP with 3 arguments. Previous versions defined it with only 1
6997argument. iASL now allows both definitions.
6998
6999iASL/disassembler: avoid infinite loop on bad ACPI tables. Check for
7000zero-
7001length subtables when disassembling ACPI tables. Also fixed a couple of
7002errors where a full 16-bit table type field was not extracted from the
7003input
7004properly.
7005
7006acpisrc: Improve comment counting mechanism for generating source code
7007statistics. Count first and last lines of multi-line comments as
7008whitespace,
7009not comment lines. Handle Linux legal header in addition to standard
7010acpica
7011header.
7012
7013----------------------------------------
7014
701529 July 2008. Summary of changes for version 20080729:
7016
70171) ACPI CA Core Subsystem:
7018
7019Fix a possible deadlock in the GPE dispatch. Remove call to
7020AcpiHwDisableAllGpes during wake in AcpiEvGpeDispatch. This call will
7021attempt
7022to acquire the GPE lock but can deadlock since the GPE lock is already
7023held
7024at dispatch time. This code was introduced in version 20060831 as a
7025response
7026to Linux BZ 6881 and has since been removed from Linux.
7027
7028Add a function to dereference returned reference objects. Examines the
7029return
7030object from a call to AcpiEvaluateObject. Any Index or RefOf references
7031are
7032automatically dereferenced in an attempt to return something useful
7033(these
7034reference types cannot be converted into an external ACPI_OBJECT.)
7035Provides
7036MS compatibility. Lin Ming, Bob Moore. Linux BZ 11105
7037
7038x2APIC support: changes for MADT and SRAT ACPI tables. There are 2 new
7039subtables for the MADT and one new subtable for the SRAT. Includes
7040disassembler and AcpiSrc support. Data from the Intel 64 Architecture
7041x2APIC
7042Specification, June 2008.
7043
7044Additional error checking for pathname utilities. Add error check after
7045all
7046calls to AcpiNsGetPathnameLength. Add status return from
7047AcpiNsBuildExternalPath and check after all calls. Add parameter
7048validation
7049to AcpiUtInitializeBuffer. Reported by and initial patch by Ingo Molnar.
7050
7051Return status from the global init function AcpiUtGlobalInitialize. This
7052is
7053used by both the kernel subsystem and the utilities such as iASL
7054compiler.
7055The function could possibly fail when the caches are initialized. Yang
7056Yi.
7057
7058Add a function to decode reference object types to strings. Created for
7059improved error messages.
7060
7061Improve object conversion error messages. Better error messages during
7062object
7063conversion from internal to the external ACPI_OBJECT. Used for external
7064calls
7065to AcpiEvaluateObject.
7066
7067Example Code and Data Size: These are the sizes for the OS-independent
7068acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7069debug version of the code includes the debug output trace mechanism and
7070has a
7071much larger code and data size.
7072
7073  Previous Release:
7074    Non-Debug Version:  79.6K Code, 16.2K Data,  95.8K Total
7075    Debug Version:     153.5K Code, 48.2K Data, 201.7K Total
7076  Current Release:
7077    Non-Debug Version:  79.7K Code, 16.4K Data,  96.1K Total
7078    Debug Version:     153.9K Code, 48.4K Data, 202.3K Total
7079
70802) iASL Compiler/Disassembler and Tools:
7081
7082Debugger: fix a possible hang when evaluating non-methods. Fixes a
7083problem
7084introduced in version 20080701. If the object being evaluated (via
7085execute
7086command) is not a method, the debugger can hang while trying to obtain
7087non-
7088existent parameters.
7089
7090iASL: relax error for using reserved "_T_x" identifiers. These names can
7091appear in a disassembled ASL file if they were emitted by the original
7092compiler. Instead of issuing an error or warning and forcing the user to
7093manually change these names, issue a remark instead.
7094
7095iASL: error if named object created in while loop. Emit an error if any
7096named
7097object is created within a While loop. If allowed, this code will
7098generate
7099a
7100run-time error on the second iteration of the loop when an attempt is
7101made
7102to
7103create the same named object twice. ACPICA bugzilla 730.
7104
7105iASL: Support absolute pathnames for include files. Add support for
7106absolute
7107pathnames within the Include operator. previously, only relative
7108pathnames
7109were supported.
7110
7111iASL: Enforce minimum 1 interrupt in interrupt macro and Resource
7112Descriptor.
7113The ACPI spec requires one interrupt minimum. BZ 423
7114
7115iASL: Handle a missing ResourceSource arg, with a present SourceIndex.
7116Handles the case for the Interrupt Resource Descriptor where
7117the ResourceSource argument is omitted but ResourceSourceIndex
7118is present. Now leave room for the Index. BZ 426
7119
7120iASL: Prevent error message if CondRefOf target does not exist. Fixes
7121cases
7122where an error message is emitted if the target does not exist. BZ 516
7123
7124iASL: Fix broken -g option (get Windows ACPI tables). Fixes the -g option
7125(get ACPI tables on Windows). This was apparently broken in version
712620070919.
7127
7128AcpiXtract: Handle EOF while extracting data. Correctly handle the case
7129where
7130the EOF happens immediately after the last table in the input file. Print
7131completion message. Previously, no message was displayed in this case.
7132
7133----------------------------------------
713401 July 2008. Summary of changes for version 20080701:
7135
71360) Git source tree / acpica.org
7137
7138Fixed a problem where a git-clone from http would not transfer the entire
7139source tree.
7140
71411) ACPI CA Core Subsystem:
7142
7143Implemented a "careful" GPE disable in AcpiEvDisableGpe, only modify one
7144enable bit. Now performs a read-change-write of the enable register
7145instead
7146of simply writing out the cached enable mask. This will prevent
7147inadvertent
7148enabling of GPEs if a rogue GPE is received during initialization (before
7149GPE
7150handlers are installed.)
7151
7152Implemented a copy for dynamically loaded tables. Previously, dynamically
7153loaded tables were simply mapped - but on some machines this memory is
7154corrupted after suspend. Now copy the table to a local buffer. For the
7155OpRegion case, added checksum verify. Use the table length from the table
7156header, not the region length. For the Buffer case, use the table length
7157also. Dennis Noordsij, Bob Moore. BZ 10734
7158
7159Fixed a problem where the same ACPI table could not be dynamically loaded
7160and
7161unloaded more than once. Without this change, a table cannot be loaded
7162again
7163once it has been loaded/unloaded one time. The current mechanism does not
7164unregister a table upon an unload. During a load, if the same table is
7165found,
7166this no longer returns an exception. BZ 722
7167
7168Fixed a problem where the wrong descriptor length was calculated for the
7169EndTag descriptor in 64-bit mode. The "minimal" descriptors such as
7170EndTag
7171are calculated as 12 bytes long, but the actual length in the internal
7172descriptor is 16 because of the round-up to 8 on the 64-bit build.
7173Reported
7174by Linn Crosetto. BZ 728
7175
7176Fixed a possible memory leak in the Unload operator. The DdbHandle
7177returned
7178by Load() did not have its reference count decremented during unload,
7179leading
7180to a memory leak. Lin Ming. BZ 727
7181
7182Fixed a possible memory leak when deleting thermal/processor objects. Any
7183associated notify handlers (and objects) were not being deleted. Fiodor
7184Suietov. BZ 506
7185
7186Fixed the ordering of the ASCII names in the global mutex table to match
7187the
7188actual mutex IDs. Used by AcpiUtGetMutexName, a function used for debug
7189only.
7190Vegard Nossum. BZ 726
7191
7192Enhanced the AcpiGetObjectInfo interface to return the number of required
7193arguments if the object is a control method. Added this call to the
7194debugger
7195so the proper number of default arguments are passed to a method. This
7196prevents a warning when executing methods from AcpiExec.
7197
7198Added a check for an invalid handle in AcpiGetObjectInfo. Return
7199AE_BAD_PARAMETER if input handle is invalid. BZ 474
7200
7201Fixed an extraneous warning from exconfig.c on the 64-bit build.
7202
7203Example Code and Data Size: These are the sizes for the OS-independent
7204acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7205debug version of the code includes the debug output trace mechanism and
7206has a
7207much larger code and data size.
7208
7209  Previous Release:
7210    Non-Debug Version:  79.3K Code, 16.2K Data,  95.5K Total
7211    Debug Version:     153.0K Code, 48.2K Data, 201.2K Total
7212  Current Release:
7213    Non-Debug Version:  79.6K Code, 16.2K Data,  95.8K Total
7214    Debug Version:     153.5K Code, 48.2K Data, 201.7K Total
7215
72162) iASL Compiler/Disassembler and Tools:
7217
7218iASL: Added two missing ACPI reserved names. Added _MTP and _ASZ, both
7219resource descriptor names.
7220
7221iASL: Detect invalid ASCII characters in input (windows version). Removed
7222the
7223"-CF" flag from the flex compile, enables correct detection of non-ASCII
7224characters in the input. BZ 441
7225
7226iASL: Eliminate warning when result of LoadTable is not used. Eliminate
7227the
7228"result of operation not used" warning when the DDB handle returned from
7229LoadTable is not used. The warning is not needed. BZ 590
7230
7231AcpiExec: Add support for dynamic table load/unload. Now calls _CFG
7232method
7233to
7234pass address of table to the AML. Added option to disable OpRegion
7235simulation
7236to allow creation of an OpRegion with a real address that was passed to
7237_CFG.
7238All of this allows testing of the Load and Unload operators from
7239AcpiExec.
7240
7241Debugger: update tables command for unloaded tables. Handle unloaded
7242tables
7243and use the standard table header output routine.
7244
7245----------------------------------------
724609 June 2008. Summary of changes for version 20080609:
7247
72481) ACPI CA Core Subsystem:
7249
7250Implemented a workaround for reversed _PRT entries. A significant number
7251of
7252BIOSs erroneously reverse the _PRT SourceName and the SourceIndex. This
7253change dynamically detects and repairs this problem. Provides
7254compatibility
7255with MS ACPI. BZ 6859
7256
7257Simplified the internal ACPI hardware interfaces to eliminate the locking
7258flag parameter from Register Read/Write. Added a new external interface,
7259AcpiGetRegisterUnlocked.
7260
7261Fixed a problem where the invocation of a GPE control method could hang.
7262This
7263was a regression introduced in 20080514. The new method argument count
7264validation mechanism can enter an infinite loop when a GPE method is
7265dispatched. Problem fixed by removing the obsolete code that passed GPE
7266block
7267information to the notify handler via the control method parameter
7268pointer.
7269
7270Fixed a problem where the _SST execution status was incorrectly returned
7271to
7272the caller of AcpiEnterSleepStatePrep. This was a regression introduced
7273in
727420080514. _SST is optional and a NOT_FOUND exception should never be
7275returned. BZ 716
7276
7277Fixed a problem where a deleted object could be accessed from within the
7278AML
7279parser. This was a regression introduced in version 20080123 as a fix for
7280the
7281Unload operator. Lin Ming. BZ 10669
7282
7283Cleaned up the debug operand dump mechanism. Eliminated unnecessary
7284operands
7285and eliminated the use of a negative index in a loop. Operands are now
7286displayed in the correct order, not backwards. This also fixes a
7287regression
7288introduced in 20080514 on 64-bit systems where the elimination of
7289ACPI_NATIVE_UINT caused the negative index to go large and positive. BZ
7290715
7291
7292Fixed a possible memory leak in EvPciConfigRegionSetup where the error
7293exit
7294path did not delete a locally allocated structure.
7295
7296Updated definitions for the DMAR and SRAT tables to synchronize with the
7297current specifications. Includes disassembler support.
7298
7299Fixed a problem in the mutex debug code (in utmutex.c) where an incorrect
7300loop termination value was used. Loop terminated on iteration early,
7301missing
7302one mutex. Linn Crosetto
7303
7304Example Code and Data Size: These are the sizes for the OS-independent
7305acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7306debug version of the code includes the debug output trace mechanism and
7307has a
7308much larger code and data size.
7309
7310  Previous Release:
7311    Non-Debug Version:  79.5K Code, 16.2K Data,  95.7K Total
7312    Debug Version:     153.3K Code, 48.3K Data, 201.6K Total
7313  Current Release:
7314    Non-Debug Version:  79.3K Code, 16.2K Data,  95.5K Total
7315    Debug Version:     153.0K Code, 48.2K Data, 201.2K Total
7316
73172) iASL Compiler/Disassembler and Tools:
7318
7319Disassembler: Implemented support for EisaId() within _CID objects. Now
7320disassemble integer _CID objects back to EisaId invocations, including
7321multiple integers within _CID packages. Includes single-step support for
7322debugger also.
7323
7324Disassembler: Added support for DMAR and SRAT table definition changes.
7325
7326----------------------------------------
732714 May 2008. Summary of changes for version 20080514:
7328
73291) ACPI CA Core Subsystem:
7330
7331Fixed a problem where GPEs were enabled too early during the ACPICA
7332initialization. This could lead to "handler not installed" errors on some
7333machines. Moved GPE enable until after _REG/_STA/_INI methods are run.
7334This
7335ensures that all operation regions and devices throughout the namespace
7336have
7337been initialized before GPEs are enabled. Alexey Starikovskiy, BZ 9916.
7338
7339Implemented a change to the enter sleep code. Moved execution of the _GTS
7340method to just before setting sleep enable bit. The execution was moved
7341from
7342AcpiEnterSleepStatePrep to AcpiEnterSleepState. _GTS is now executed
7343immediately before the SLP_EN bit is set, as per the ACPI specification.
7344Luming Yu, BZ 1653.
7345
7346Implemented a fix to disable unknown GPEs (2nd version). Now always
7347disable
7348the GPE, even if ACPICA thinks that that it is already disabled. It is
7349possible that the AML or some other code has enabled the GPE unbeknownst
7350to
7351the ACPICA code.
7352
7353Fixed a problem with the Field operator where zero-length fields would
7354return
7355an AE_AML_NO_OPERAND exception during table load. Fix enables zero-length
7356ASL
7357field declarations in Field(), BankField(), and IndexField(). BZ 10606.
7358
7359Implemented a fix for the Load operator, now load the table at the
7360namespace
7361root. This reverts a change introduced in version 20071019. The table is
7362now
7363loaded at the namespace root even though this goes against the ACPI
7364specification. This provides compatibility with other ACPI
7365implementations.
7366The ACPI specification will be updated to reflect this in ACPI 4.0. Lin
7367Ming.
7368
7369Fixed a problem where ACPICA would not Load() tables with unusual
7370signatures.
7371Now ignore ACPI table signature for Load() operator. Only "SSDT" is
7372acceptable to the ACPI spec, but tables are seen with OEMx and null sigs.
7373Therefore, signature validation is worthless. Apparently MS ACPI accepts
7374such
7375signatures, ACPICA must be compatible. BZ 10454.
7376
7377Fixed a possible negative array index in AcpiUtValidateException. Added
7378NULL
7379fields to the exception string arrays to eliminate a -1 subtraction on
7380the
7381SubStatus field.
7382
7383Updated the debug tracking macros to reduce overall code and data size.
7384Changed ACPI_MODULE_NAME and ACPI_FUNCTION_NAME to use arrays of strings
7385instead of pointers to static strings. Jan Beulich and Bob Moore.
7386
7387Implemented argument count checking in control method invocation via
7388AcpiEvaluateObject. Now emit an error if too few arguments, warning if
7389too
7390many. This applies only to extern programmatic control method execution,
7391not
7392method-to-method calls within the AML. Lin Ming.
7393
7394Eliminated the ACPI_NATIVE_UINT type across all ACPICA code. This type is
7395no
7396longer needed, especially with the removal of 16-bit support. It was
7397replaced
7398mostly with UINT32, but also ACPI_SIZE where a type that changes 32/64
7399bit
7400on
740132/64-bit platforms is required.
7402
7403Added the C const qualifier for appropriate string constants -- mostly
7404MODULE_NAME and printf format strings. Jan Beulich.
7405
7406Example Code and Data Size: These are the sizes for the OS-independent
7407acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7408debug version of the code includes the debug output trace mechanism and
7409has a
7410much larger code and data size.
7411
7412  Previous Release:
7413    Non-Debug Version:  80.0K Code, 17.4K Data,  97.4K Total
7414    Debug Version:     159.4K Code, 64.4K Data, 223.8K Total
7415  Current Release:
7416    Non-Debug Version:  79.5K Code, 16.2K Data,  95.7K Total
7417    Debug Version:     153.3K Code, 48.3K Data, 201.6K Total
7418
74192) iASL Compiler/Disassembler and Tools:
7420
7421Implemented ACPI table revision ID validation in the disassembler. Zero
7422is
7423always invalid. For DSDTs, the ID controls the interpreter integer width.
74241
7425means 32-bit and this is unusual. 2 or greater is 64-bit.
7426
7427----------------------------------------
742821 March 2008. Summary of changes for version 20080321:
7429
74301) ACPI CA Core Subsystem:
7431
7432Implemented an additional change to the GPE support in order to suppress
7433spurious or stray GPEs. The AcpiEvDisableGpe function will now
7434permanently
7435disable incoming GPEs that are neither enabled nor disabled -- meaning
7436that
7437the GPE is unknown to the system. This should prevent future interrupt
7438floods
7439from that GPE. BZ 6217 (Zhang Rui)
7440
7441Fixed a problem where NULL package elements were not returned to the
7442AcpiEvaluateObject interface correctly. The element was simply ignored
7443instead of returning a NULL ACPI_OBJECT package element, potentially
7444causing
7445a buffer overflow and/or confusing the caller who expected a fixed number
7446of
7447elements. BZ 10132 (Lin Ming, Bob Moore)
7448
7449Fixed a problem with the CreateField, CreateXXXField (Bit, Byte, Word,
7450Dword,
7451Qword), Field, BankField, and IndexField operators when invoked from
7452inside
7453an executing control method. In this case, these operators created
7454namespace
7455nodes that were incorrectly left marked as permanent nodes instead of
7456temporary nodes. This could cause a problem if there is race condition
7457between an exiting control method and a running namespace walk. (Reported
7458by
7459Linn Crosetto)
7460
7461Fixed a problem where the CreateField and CreateXXXField operators would
7462incorrectly allow duplicate names (the name of the field) with no
7463exception
7464generated.
7465
7466Implemented several changes for Notify handling. Added support for new
7467Notify
7468values (ACPI 2.0+) and improved the Notify debug output. Notify on
7469PowerResource objects is no longer allowed, as per the ACPI
7470specification.
7471(Bob Moore, Zhang Rui)
7472
7473All Reference Objects returned via the AcpiEvaluateObject interface are
7474now
7475marked as type "REFERENCE" instead of "ANY". The type ANY is now reserved
7476for
7477NULL objects - either NULL package elements or unresolved named
7478references.
7479
7480Fixed a problem where an extraneous debug message was produced for
7481package
7482objects (when debugging enabled). The message "Package List length larger
7483than NumElements count" is now produced in the correct case, and is now
7484an
7485error message rather than a debug message. Added a debug message for the
7486opposite case, where NumElements is larger than the Package List (the
7487package
7488will be padded out with NULL elements as per the ACPI spec.)
7489
7490Implemented several improvements for the output of the ASL "Debug" object
7491to
7492clarify and keep all data for a given object on one output line.
7493
7494Fixed two size calculation issues with the variable-length Start
7495Dependent
7496resource descriptor.
7497
7498Example Code and Data Size: These are the sizes for the OS-independent
7499acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7500debug version of the code includes the debug output trace mechanism and
7501has
7502a much larger code and data size.
7503
7504  Previous Release:
7505    Non-Debug Version:  79.7K Code, 17.3K Data,  97.0K Total
7506    Debug Version:     158.9K Code, 64.0K Data, 222.9K Total
7507  Current Release:
7508    Non-Debug Version:  80.0K Code, 17.4K Data,  97.4K Total
7509    Debug Version:     159.4K Code, 64.4K Data, 223.8K Total
7510
75112) iASL Compiler/Disassembler and Tools:
7512
7513Fixed a problem with the use of the Switch operator where execution of
7514the
7515containing method by multiple concurrent threads could cause an
7516AE_ALREADY_EXISTS exception. This is caused by the fact that there is no
7517actual Switch opcode, it must be simulated with local named temporary
7518variables and if/else pairs. The solution chosen was to mark any method
7519that
7520uses Switch as Serialized, thus preventing multiple thread entries. BZ
7521469.
7522
7523----------------------------------------
752413 February 2008. Summary of changes for version 20080213:
7525
75261) ACPI CA Core Subsystem:
7527
7528Implemented another MS compatibility design change for GPE/Notify
7529handling.
7530GPEs are now cleared/enabled asynchronously to allow all pending notifies
7531to
7532complete first. It is expected that the OSL will queue the enable request
7533behind all pending notify requests (may require changes to the local host
7534OSL
7535in AcpiOsExecute). Alexey Starikovskiy.
7536
7537Fixed a problem where buffer and package objects passed as arguments to a
7538control method via the external AcpiEvaluateObject interface could cause
7539an
7540AE_AML_INTERNAL exception depending on the order and type of operators
7541executed by the target control method.
7542
7543Fixed a problem where resource descriptor size optimization could cause a
7544problem when a _CRS resource template is passed to a _SRS method. The
7545_SRS
7546resource template must use the same descriptors (with the same size) as
7547returned from _CRS. This change affects the following resource
7548descriptors:
7549IRQ / IRQNoFlags and StartDependendentFn / StartDependentFnNoPri. (BZ
75509487)
7551
7552Fixed a problem where a CopyObject to RegionField, BankField, and
7553IndexField
7554objects did not perform an implicit conversion as it should. These types
7555must
7556retain their initial type permanently as per the ACPI specification.
7557However,
7558a CopyObject to all other object types should not perform an implicit
7559conversion, as per the ACPI specification. (Lin Ming, Bob Moore) BZ 388
7560
7561Fixed a problem with the AcpiGetDevices interface where the mechanism to
7562match device CIDs did not examine the entire list of available CIDs, but
7563instead aborted on the first non-matching CID. Andrew Patterson.
7564
7565Fixed a regression introduced in version 20071114. The ACPI_HIDWORD macro
7566was
7567inadvertently changed to return a 16-bit value instead of a 32-bit value,
7568truncating the upper dword of a 64-bit value. This macro is only used to
7569display debug output, so no incorrect calculations were made. Also,
7570reimplemented the macro so that a 64-bit shift is not performed by
7571inefficient compilers.
7572
7573Added missing va_end statements that should correspond with each va_start
7574statement.
7575
7576Example Code and Data Size: These are the sizes for the OS-independent
7577acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7578debug version of the code includes the debug output trace mechanism and
7579has
7580a much larger code and data size.
7581
7582  Previous Release:
7583    Non-Debug Version:  79.5K Code, 17.2K Data,  96.7K Total
7584    Debug Version:     159.0K Code, 63.8K Data, 222.8K Total
7585  Current Release:
7586    Non-Debug Version:  79.7K Code, 17.3K Data,  97.0K Total
7587    Debug Version:     158.9K Code, 64.0K Data, 222.9K Total
7588
75892) iASL Compiler/Disassembler and Tools:
7590
7591Implemented full disassembler support for the following new ACPI tables:
7592BERT, EINJ, and ERST. Implemented partial disassembler support for the
7593complicated HEST table. These tables support the Windows Hardware Error
7594Architecture (WHEA).
7595
7596----------------------------------------
759723 January 2008. Summary of changes for version 20080123:
7598
75991) ACPI CA Core Subsystem:
7600
7601Added the 2008 copyright to all module headers and signons. This affects
7602virtually every file in the ACPICA core subsystem, the iASL compiler, and
7603the tools/utilities.
7604
7605Fixed a problem with the SizeOf operator when used with Package and
7606Buffer
7607objects. These objects have deferred execution for some arguments, and
7608the
7609execution is now completed before the SizeOf is executed. This problem
7610caused
7611unexpected AE_PACKAGE_LIMIT errors on some systems (Lin Ming, Bob Moore)
7612BZ
76139558
7614
7615Implemented an enhancement to the interpreter "slack mode". In the
7616absence
7617of
7618an explicit return or an implicitly returned object from the last
7619executed
7620opcode, a control method will now implicitly return an integer of value 0
7621for
7622Microsoft compatibility. (Lin Ming) BZ 392
7623
7624Fixed a problem with the Load operator where an exception was not
7625returned
7626in
7627the case where the table is already loaded. (Lin Ming) BZ 463
7628
7629Implemented support for the use of DDBHandles as an Indexed Reference, as
7630per
7631the ACPI spec. (Lin Ming) BZ 486
7632
7633Implemented support for UserTerm (Method invocation) for the Unload
7634operator
7635as per the ACPI spec. (Lin Ming) BZ 580
7636
7637Fixed a problem with the LoadTable operator where the OemId and
7638OemTableId
7639input strings could cause unexpected failures if they were shorter than
7640the
7641maximum lengths allowed. (Lin Ming, Bob Moore) BZ 576
7642
7643Implemented support for UserTerm (Method invocation) for the Unload
7644operator
7645as per the ACPI spec. (Lin Ming) BZ 580
7646
7647Implemented header file support for new ACPI tables - BERT, ERST, EINJ,
7648HEST,
7649IBFT, UEFI, WDAT. Disassembler support is forthcoming.
7650
7651Example Code and Data Size: These are the sizes for the OS-independent
7652acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7653debug version of the code includes the debug output trace mechanism and
7654has
7655a much larger code and data size.
7656
7657  Previous Release:
7658    Non-Debug Version:  79.3K Code, 17.2K Data,  96.5K Total
7659    Debug Version:     158.6K Code, 63.8K Data, 222.4K Total
7660  Current Release:
7661    Non-Debug Version:  79.5K Code, 17.2K Data,  96.7K Total
7662    Debug Version:     159.0K Code, 63.8K Data, 222.8K Total
7663
76642) iASL Compiler/Disassembler and Tools:
7665
7666Implemented support in the disassembler for checksum validation on
7667incoming
7668binary DSDTs and SSDTs. If incorrect, a message is displayed within the
7669table
7670header dump at the start of the disassembly.
7671
7672Implemented additional debugging information in the namespace listing
7673file
7674created during compilation. In addition to the namespace hierarchy, the
7675full
7676pathname to each namespace object is displayed.
7677
7678Fixed a problem with the disassembler where invalid ACPI tables could
7679cause
7680faults or infinite loops.
7681
7682Fixed an unexpected parse error when using the optional "parameter types"
7683list in a control method declaration. (Lin Ming) BZ 397
7684
7685Fixed a problem where two External declarations with the same name did
7686not
7687cause an error (Lin Ming) BZ 509
7688
7689Implemented support for full TermArgs (adding Argx, Localx and method
7690invocation) for the ParameterData parameter to the LoadTable operator.
7691(Lin
7692Ming) BZ 583,587
7693
7694----------------------------------------
769519 December 2007. Summary of changes for version 20071219:
7696
76971) ACPI CA Core Subsystem:
7698
7699Implemented full support for deferred execution for the TermArg string
7700arguments for DataTableRegion. This enables forward references and full
7701operand resolution for the three string arguments. Similar to
7702OperationRegion
7703deferred argument execution.) Lin Ming. BZ 430
7704
7705Implemented full argument resolution support for the BankValue argument
7706to
7707BankField. Previously, only constants were supported, now any TermArg may
7708be
7709used. Lin Ming BZ 387, 393
7710
7711Fixed a problem with AcpiGetDevices where the search of a branch of the
7712device tree could be terminated prematurely. In accordance with the ACPI
7713specification, the search down the current branch is terminated if a
7714device
7715is both not present and not functional (instead of just not present.)
7716Yakui
7717Zhao.
7718
7719Fixed a problem where "unknown" GPEs could be allowed to fire repeatedly
7720if
7721the underlying AML code changed the GPE enable registers. Now, any
7722unknown
7723incoming GPE (no _Lxx/_Exx method and not the EC GPE) is immediately
7724disabled
7725instead of simply ignored. Rui Zhang.
7726
7727Fixed a problem with Index Fields where the Index register was
7728incorrectly
7729limited to a maximum of 32 bits. Now any size may be used.
7730
7731Fixed a couple memory leaks associated with "implicit return" objects
7732when
7733the AML Interpreter slack mode is enabled. Lin Ming BZ 349
7734
7735Example Code and Data Size: These are the sizes for the OS-independent
7736acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7737debug version of the code includes the debug output trace mechanism and
7738has
7739a much larger code and data size.
7740
7741  Previous Release:
7742    Non-Debug Version:  79.0K Code, 17.2K Data,  96.2K Total
7743    Debug Version:     157.9K Code, 63.6K Data, 221.5K Total
7744  Current Release:
7745    Non-Debug Version:  79.3K Code, 17.2K Data,  96.5K Total
7746    Debug Version:     158.6K Code, 63.8K Data, 222.4K Total
7747
7748----------------------------------------
774914 November 2007. Summary of changes for version 20071114:
7750
77511) ACPI CA Core Subsystem:
7752
7753Implemented event counters for each of the Fixed Events, the ACPI SCI
7754(interrupt) itself, and control methods executed. Named
7755AcpiFixedEventCount[], AcpiSciCount, and AcpiMethodCount respectively.
7756These
7757should be useful for debugging and statistics.
7758
7759Implemented a new external interface, AcpiGetStatistics, to retrieve the
7760contents of the various event counters. Returns the current values for
7761AcpiSciCount, AcpiGpeCount, the AcpiFixedEventCount array, and
7762AcpiMethodCount. The interface can be expanded in the future if new
7763counters
7764are added. Device drivers should use this interface rather than access
7765the
7766counters directly.
7767
7768Fixed a problem with the FromBCD and ToBCD operators. With some
7769compilers,
7770the ShortDivide function worked incorrectly, causing problems with the
7771BCD
7772functions with large input values. A truncation from 64-bit to 32-bit
7773inadvertently occurred. Internal BZ 435. Lin Ming
7774
7775Fixed a problem with Index references passed as method arguments.
7776References
7777passed as arguments to control methods were dereferenced immediately
7778(before
7779control was passed to the called method). The references are now
7780correctly
7781passed directly to the called method. BZ 5389. Lin Ming
7782
7783Fixed a problem with CopyObject used in conjunction with the Index
7784operator.
7785The reference was incorrectly dereferenced before the copy. The reference
7786is
7787now correctly copied. BZ 5391. Lin Ming
7788
7789Fixed a problem with Control Method references within Package objects.
7790These
7791references are now correctly generated. This completes the package
7792construction overhaul that began in version 20071019.
7793
7794Example Code and Data Size: These are the sizes for the OS-independent
7795acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7796debug version of the code includes the debug output trace mechanism and
7797has
7798a much larger code and data size.
7799
7800  Previous Release:
7801    Non-Debug Version:  78.8K Code, 17.2K Data,  96.0K Total
7802    Debug Version:     157.2K Code, 63.4K Data, 220.6K Total
7803  Current Release:
7804    Non-Debug Version:  79.0K Code, 17.2K Data,  96.2K Total
7805    Debug Version:     157.9K Code, 63.6K Data, 221.5K Total
7806
7807
78082) iASL Compiler/Disassembler and Tools:
7809
7810The AcpiExec utility now installs handlers for all of the predefined
7811Operation Region types. New types supported are: PCI_Config, CMOS, and
7812PCIBARTarget.
7813
7814Fixed a problem with the 64-bit version of AcpiExec where the extended
7815(64-
7816bit) address fields for the DSDT and FACS within the FADT were not being
7817used, causing truncation of the upper 32-bits of these addresses. Lin
7818Ming
7819and Bob Moore
7820
7821----------------------------------------
782219 October 2007. Summary of changes for version 20071019:
7823
78241) ACPI CA Core Subsystem:
7825
7826Fixed a problem with the Alias operator when the target of the alias is a
7827named ASL operator that opens a new scope -- Scope, Device,
7828PowerResource,
7829Processor, and ThermalZone. In these cases, any children of the original
7830operator could not be accessed via the alias, potentially causing
7831unexpected
7832AE_NOT_FOUND exceptions. (BZ 9067)
7833
7834Fixed a problem with the Package operator where all named references were
7835created as object references and left otherwise unresolved. According to
7836the
7837ACPI specification, a Package can only contain Data Objects or references
7838to
7839control methods. The implication is that named references to Data Objects
7840(Integer, Buffer, String, Package, BufferField, Field) should be resolved
7841immediately upon package creation. This is the approach taken with this
7842change. References to all other named objects (Methods, Devices, Scopes,
7843etc.) are all now properly created as reference objects. (BZ 5328)
7844
7845Reverted a change to Notify handling that was introduced in version
784620070508. This version changed the Notify handling from asynchronous to
7847fully synchronous (Device driver Notify handling with respect to the
7848Notify
7849ASL operator). It was found that this change caused more problems than it
7850solved and was removed by most users.
7851
7852Fixed a problem with the Increment and Decrement operators where the type
7853of
7854the target object could be unexpectedly and incorrectly changed. (BZ 353)
7855Lin Ming.
7856
7857Fixed a problem with the Load and LoadTable operators where the table
7858location within the namespace was ignored. Instead, the table was always
7859loaded into the root or current scope. Lin Ming.
7860
7861Fixed a problem with the Load operator when loading a table from a buffer
7862object. The input buffer was prematurely zeroed and/or deleted. (BZ 577)
7863
7864Fixed a problem with the Debug object where a store of a DdbHandle
7865reference
7866object to the Debug object could cause a fault.
7867
7868Added a table checksum verification for the Load operator, in the case
7869where
7870the load is from a buffer. (BZ 578).
7871
7872Implemented additional parameter validation for the LoadTable operator.
7873The
7874length of the input strings SignatureString, OemIdString, and OemTableId
7875are
7876now checked for maximum lengths. (BZ 582) Lin Ming.
7877
7878Example Code and Data Size: These are the sizes for the OS-independent
7879acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7880debug version of the code includes the debug output trace mechanism and
7881has
7882a much larger code and data size.
7883
7884  Previous Release:
7885    Non-Debug Version:  78.5K Code, 17.1K Data,  95.6K Total
7886    Debug Version:     156.7K Code, 63.2K Data, 219.9K Total
7887  Current Release:
7888    Non-Debug Version:  78.8K Code, 17.2K Data,  96.0K Total
7889    Debug Version:     157.2K Code, 63.4K Data, 220.6K Total
7890
7891
78922) iASL Compiler/Disassembler:
7893
7894Fixed a problem where if a single file was specified and the file did not
7895exist, no error message was emitted. (Introduced with wildcard support in
7896version 20070917.)
7897
7898----------------------------------------
789919 September 2007. Summary of changes for version 20070919:
7900
79011) ACPI CA Core Subsystem:
7902
7903Designed and implemented new external interfaces to install and remove
7904handlers for ACPI table-related events. Current events that are defined
7905are
7906LOAD and UNLOAD. These interfaces allow the host to track ACPI tables as
7907they are dynamically loaded and unloaded. See AcpiInstallTableHandler and
7908AcpiRemoveTableHandler. (Lin Ming and Bob Moore)
7909
7910Fixed a problem where the use of the AcpiGbl_AllMethodsSerialized flag
7911(acpi_serialized option on Linux) could cause some systems to hang during
7912initialization. (Bob Moore) BZ 8171
7913
7914Fixed a problem where objects of certain types (Device, ThermalZone,
7915Processor, PowerResource) can be not found if they are declared and
7916referenced from within the same control method (Lin Ming) BZ 341
7917
7918Example Code and Data Size: These are the sizes for the OS-independent
7919acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7920debug version of the code includes the debug output trace mechanism and
7921has
7922a much larger code and data size.
7923
7924  Previous Release:
7925    Non-Debug Version:  78.3K Code, 17.0K Data,  95.3K Total
7926    Debug Version:     156.3K Code, 63.1K Data, 219.4K Total
7927  Current Release:
7928    Non-Debug Version:  78.5K Code, 17.1K Data,  95.6K Total
7929    Debug Version:     156.7K Code, 63.2K Data, 219.9K Total
7930
7931
79322) iASL Compiler/Disassembler:
7933
7934Implemented support to allow multiple files to be compiled/disassembled
7935in
7936a
7937single invocation. This includes command line wildcard support for both
7938the
7939Windows and Unix versions of the compiler. This feature simplifies the
7940disassembly and compilation of multiple ACPI tables in a single
7941directory.
7942
7943----------------------------------------
794408 May 2007. Summary of changes for version 20070508:
7945
79461) ACPI CA Core Subsystem:
7947
7948Implemented a Microsoft compatibility design change for the handling of
7949the
7950Notify AML operator. Previously, notify handlers were dispatched and
7951executed completely asynchronously in a deferred thread. The new design
7952still executes the notify handlers in a different thread, but the
7953original
7954thread that executed the Notify() now waits at a synchronization point
7955for
7956the notify handler to complete. Some machines depend on a synchronous
7957Notify
7958operator in order to operate correctly.
7959
7960Implemented support to allow Package objects to be passed as method
7961arguments to the external AcpiEvaluateObject interface. Previously, this
7962would return the AE_NOT_IMPLEMENTED exception. This feature had not been
7963implemented since there were no reserved control methods that required it
7964until recently.
7965
7966Fixed a problem with the internal FADT conversion where ACPI 1.0 FADTs
7967that
7968contained invalid non-zero values in reserved fields could cause later
7969failures because these fields have meaning in later revisions of the
7970FADT.
7971For incoming ACPI 1.0 FADTs, these fields are now always zeroed. (The
7972fields
7973are: Preferred_PM_Profile, PSTATE_CNT, CST_CNT, and IAPC_BOOT_FLAGS.)
7974
7975Fixed a problem where the Global Lock handle was not properly updated if
7976a
7977thread that acquired the Global Lock via executing AML code then
7978attempted
7979to acquire the lock via the AcpiAcquireGlobalLock interface. Reported by
7980Joe
7981Liu.
7982
7983Fixed a problem in AcpiEvDeleteGpeXrupt where the global interrupt list
7984could be corrupted if the interrupt being removed was at the head of the
7985list. Reported by Linn Crosetto.
7986
7987Example Code and Data Size: These are the sizes for the OS-independent
7988acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7989debug version of the code includes the debug output trace mechanism and
7990has
7991a much larger code and data size.
7992
7993  Previous Release:
7994    Non-Debug Version:  78.0K Code, 17.1K Data,  95.1K Total
7995    Debug Version:     155.9K Code, 63.1K Data, 219.0K Total
7996  Current Release:
7997    Non-Debug Version:  78.3K Code, 17.0K Data,  95.3K Total
7998    Debug Version:     156.3K Code, 63.1K Data, 219.4K Total
7999
8000----------------------------------------
800120 March 2007. Summary of changes for version 20070320:
8002
80031) ACPI CA Core Subsystem:
8004
8005Implemented a change to the order of interpretation and evaluation of AML
8006operand objects within the AML interpreter. The interpreter now evaluates
8007operands in the order that they appear in the AML stream (and the
8008corresponding ASL code), instead of in the reverse order (after the
8009entire
8010operand list has been parsed). The previous behavior caused several
8011subtle
8012incompatibilities with the Microsoft AML interpreter as well as being
8013somewhat non-intuitive. BZ 7871, local BZ 263. Valery Podrezov.
8014
8015Implemented a change to the ACPI Global Lock support. All interfaces to
8016the
8017global lock now allow the same thread to acquire the lock multiple times.
8018This affects the AcpiAcquireGlobalLock external interface to the global
8019lock
8020as well as the internal use of the global lock to support AML fields -- a
8021control method that is holding the global lock can now simultaneously
8022access
8023AML fields that require global lock protection. Previously, in both
8024cases,
8025this would have resulted in an AE_ALREADY_ACQUIRED exception. The change
8026to
8027AcpiAcquireGlobalLock is of special interest to drivers for the Embedded
8028Controller. There is no change to the behavior of the AML Acquire
8029operator,
8030as this can already be used to acquire a mutex multiple times by the same
8031thread. BZ 8066. With assistance from Alexey Starikovskiy.
8032
8033Fixed a problem where invalid objects could be referenced in the AML
8034Interpreter after error conditions. During operand evaluation, ensure
8035that
8036the internal "Return Object" field is cleared on error and only valid
8037pointers are stored there. Caused occasional access to deleted objects
8038that
8039resulted in "large reference count" warning messages. Valery Podrezov.
8040
8041Fixed a problem where an AE_STACK_OVERFLOW internal exception could occur
8042on
8043deeply nested control method invocations. BZ 7873, local BZ 487. Valery
8044Podrezov.
8045
8046Fixed an internal problem with the handling of result objects on the
8047interpreter result stack. BZ 7872. Valery Podrezov.
8048
8049Removed obsolete code that handled the case where AML_NAME_OP is the
8050target
8051of a reference (Reference.Opcode). This code was no longer necessary. BZ
80527874. Valery Podrezov.
8053
8054Removed obsolete ACPI_NO_INTEGER64_SUPPORT from two header files. This
8055was
8056a
8057remnant from the previously discontinued 16-bit support.
8058
8059Example Code and Data Size: These are the sizes for the OS-independent
8060acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8061debug version of the code includes the debug output trace mechanism and
8062has
8063a much larger code and data size.
8064
8065  Previous Release:
8066    Non-Debug Version:  78.0K Code, 17.1K Data,  95.1K Total
8067    Debug Version:     155.8K Code, 63.3K Data, 219.1K Total
8068  Current Release:
8069    Non-Debug Version:  78.0K Code, 17.1K Data,  95.1K Total
8070    Debug Version:     155.9K Code, 63.1K Data, 219.0K Total
8071
8072----------------------------------------
807326 January 2007. Summary of changes for version 20070126:
8074
80751) ACPI CA Core Subsystem:
8076
8077Added the 2007 copyright to all module headers and signons. This affects
8078virtually every file in the ACPICA core subsystem, the iASL compiler, and
8079the utilities.
8080
8081Implemented a fix for an incorrect parameter passed to AcpiTbDeleteTable
8082during a table load. A bad pointer was passed in the case where the DSDT
8083is
8084overridden, causing a fault in this case.
8085
8086Example Code and Data Size: These are the sizes for the OS-independent
8087acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8088debug version of the code includes the debug output trace mechanism and
8089has
8090a much larger code and data size.
8091
8092  Previous Release:
8093    Non-Debug Version:  78.0K Code, 17.1K Data,  95.1K Total
8094    Debug Version:     155.8K Code, 63.3K Data, 219.1K Total
8095  Current Release:
8096    Non-Debug Version:  78.0K Code, 17.1K Data,  95.1K Total
8097    Debug Version:     155.8K Code, 63.3K Data, 219.1K Total
8098
8099----------------------------------------
810015 December 2006. Summary of changes for version 20061215:
8101
81021) ACPI CA Core Subsystem:
8103
8104Support for 16-bit ACPICA has been completely removed since it is no
8105longer
8106necessary and it clutters the code. All 16-bit macros, types, and
8107conditional compiles have been removed, cleaning up and simplifying the
8108code
8109across the entire subsystem. DOS support is no longer needed since the
8110bootable Linux firmware kit is now available.
8111
8112The handler for the Global Lock is now removed during AcpiTerminate to
8113enable a clean subsystem restart, via the implementation of the
8114AcpiEvRemoveGlobalLockHandler function. (With assistance from Joel Bretz,
8115HP)
8116
8117Implemented enhancements to the multithreading support within the
8118debugger
8119to enable improved multithreading debugging and evaluation of the
8120subsystem.
8121(Valery Podrezov)
8122
8123Debugger: Enhanced the Statistics/Memory command to emit the total
8124(maximum)
8125memory used during the execution, as well as the maximum memory consumed
8126by
8127each of the various object types. (Valery Podrezov)
8128
8129Example Code and Data Size: These are the sizes for the OS-independent
8130acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8131debug version of the code includes the debug output trace mechanism and
8132has
8133a much larger code and data size.
8134
8135  Previous Release:
8136    Non-Debug Version:  77.9K Code, 17.0K Data,  94.9K Total
8137    Debug Version:     155.2K Code, 63.1K Data, 218.3K Total
8138  Current Release:
8139    Non-Debug Version:  78.0K Code, 17.1K Data,  95.1K Total
8140    Debug Version:     155.8K Code, 63.3K Data, 219.1K Total
8141
8142
81432) iASL Compiler/Disassembler and Tools:
8144
8145AcpiExec: Implemented a new option (-m) to display full memory use
8146statistics upon subsystem/program termination. (Valery Podrezov)
8147
8148----------------------------------------
814909 November 2006. Summary of changes for version 20061109:
8150
81511) ACPI CA Core Subsystem:
8152
8153Optimized the Load ASL operator in the case where the source operand is
8154an
8155operation region. Simply map the operation region memory, instead of
8156performing a bytewise read. (Region must be of type SystemMemory, see
8157below.)
8158
8159Fixed the Load ASL operator for the case where the source operand is a
8160region field. A buffer object is also allowed as the source operand. BZ
8161480
8162
8163Fixed a problem where the Load ASL operator allowed the source operand to
8164be
8165an operation region of any type. It is now restricted to regions of type
8166SystemMemory, as per the ACPI specification. BZ 481
8167
8168Additional cleanup and optimizations for the new Table Manager code.
8169
8170AcpiEnable will now fail if all of the required ACPI tables are not
8171loaded
8172(FADT, FACS, DSDT). BZ 477
8173
8174Added #pragma pack(8/4) to acobject.h to ensure that the structures in
8175this
8176header are always compiled as aligned. The ACPI_OPERAND_OBJECT has been
8177manually optimized to be aligned and will not work if it is byte-packed.
8178
8179Example Code and Data Size: These are the sizes for the OS-independent
8180acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8181debug version of the code includes the debug output trace mechanism and
8182has
8183a much larger code and data size.
8184
8185  Previous Release:
8186    Non-Debug Version:  78.1K Code, 17.1K Data,  95.2K Total
8187    Debug Version:     155.4K Code, 63.1K Data, 218.5K Total
8188  Current Release:
8189    Non-Debug Version:  77.9K Code, 17.0K Data,  94.9K Total
8190    Debug Version:     155.2K Code, 63.1K Data, 218.3K Total
8191
8192
81932) iASL Compiler/Disassembler and Tools:
8194
8195Fixed a problem where the presence of the _OSI predefined control method
8196within complex expressions could cause an internal compiler error.
8197
8198AcpiExec: Implemented full region support for multiple address spaces.
8199SpaceId is now part of the REGION object. BZ 429
8200
8201----------------------------------------
820211 October 2006. Summary of changes for version 20061011:
8203
82041) ACPI CA Core Subsystem:
8205
8206Completed an AML interpreter performance enhancement for control method
8207execution. Previously a 2-pass parse/execution, control methods are now
8208completely parsed and executed in a single pass. This improves overall
8209interpreter performance by ~25%, reduces code size, and reduces CPU stack
8210use. (Valery Podrezov + interpreter changes in version 20051202 that
8211eliminated namespace loading during the pass one parse.)
8212
8213Implemented _CID support for PCI Root Bridge detection. If the _HID does
8214not
8215match the predefined PCI Root Bridge IDs, the _CID list (if present) is
8216now
8217obtained and also checked for an ID match.
8218
8219Implemented additional support for the PCI _ADR execution: upsearch until
8220a
8221device scope is found before executing _ADR. This allows PCI_Config
8222operation regions to be declared locally within control methods
8223underneath
8224PCI device objects.
8225
8226Fixed a problem with a possible race condition between threads executing
8227AcpiWalkNamespace and the AML interpreter. This condition was removed by
8228modifying AcpiWalkNamespace to (by default) ignore all temporary
8229namespace
8230entries created during any concurrent control method execution. An
8231additional namespace race condition is known to exist between
8232AcpiWalkNamespace and the Load/Unload ASL operators and is still under
8233investigation.
8234
8235Restructured the AML ParseLoop function, breaking it into several
8236subfunctions in order to reduce CPU stack use and improve
8237maintainability.
8238(Mikhail Kouzmich)
8239
8240AcpiGetHandle: Fix for parameter validation to detect invalid
8241combinations
8242of prefix handle and pathname. BZ 478
8243
8244Example Code and Data Size: These are the sizes for the OS-independent
8245acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8246debug version of the code includes the debug output trace mechanism and
8247has
8248a much larger code and data size.
8249
8250  Previous Release:
8251    Non-Debug Version:  77.9K Code, 17.1K Data,  95.0K Total
8252    Debug Version:     154.6K Code, 63.0K Data, 217.6K Total
8253  Current Release:
8254    Non-Debug Version:  78.1K Code, 17.1K Data,  95.2K Total
8255    Debug Version:     155.4K Code, 63.1K Data, 218.5K Total
8256
82572) iASL Compiler/Disassembler and Tools:
8258
8259Ported the -g option (get local ACPI tables) to the new ACPICA Table
8260Manager
8261to restore original behavior.
8262
8263----------------------------------------
826427 September 2006. Summary of changes for version 20060927:
8265
82661) ACPI CA Core Subsystem:
8267
8268Removed the "Flags" parameter from AcpiGetRegister and AcpiSetRegister.
8269These functions now use a spinlock for mutual exclusion and the interrupt
8270level indication flag is not needed.
8271
8272Fixed a problem with the Global Lock where the lock could appear to be
8273obtained before it is actually obtained. The global lock semaphore was
8274inadvertently created with one unit instead of zero units. (BZ 464)
8275Fiodor
8276Suietov.
8277
8278Fixed a possible memory leak and fault in AcpiExResolveObjectToValue
8279during
8280a read from a buffer or region field. (BZ 458) Fiodor Suietov.
8281
8282Example Code and Data Size: These are the sizes for the OS-independent
8283acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8284debug version of the code includes the debug output trace mechanism and
8285has
8286a much larger code and data size.
8287
8288  Previous Release:
8289    Non-Debug Version:  77.9K Code, 17.1K Data,  95.0K Total
8290    Debug Version:     154.7K Code, 63.0K Data, 217.7K Total
8291  Current Release:
8292    Non-Debug Version:  77.9K Code, 17.1K Data,  95.0K Total
8293    Debug Version:     154.6K Code, 63.0K Data, 217.6K Total
8294
8295
82962) iASL Compiler/Disassembler and Tools:
8297
8298Fixed a compilation problem with the pre-defined Resource Descriptor
8299field
8300names where an "object does not exist" error could be incorrectly
8301generated
8302if the parent ResourceTemplate pathname places the template within a
8303different namespace scope than the current scope. (BZ 7212)
8304
8305Fixed a problem where the compiler could hang after syntax errors
8306detected
8307in an ElseIf construct. (BZ 453)
8308
8309Fixed a problem with the AmlFilename parameter to the DefinitionBlock()
8310operator. An incorrect output filename was produced when this parameter
8311was
8312a null string (""). Now, the original input filename is used as the AML
8313output filename, with an ".aml" extension.
8314
8315Implemented a generic batch command mode for the AcpiExec utility
8316(execute
8317any AML debugger command) (Valery Podrezov).
8318
8319----------------------------------------
832012 September 2006. Summary of changes for version 20060912:
8321
83221) ACPI CA Core Subsystem:
8323
8324Enhanced the implementation of the "serialized mode" of the interpreter
8325(enabled via the AcpiGbl_AllMethodsSerialized flag.) When this mode is
8326specified, instead of creating a serialization semaphore per control
8327method,
8328the interpreter lock is simply no longer released before a blocking
8329operation during control method execution. This effectively makes the AML
8330Interpreter single-threaded. The overhead of a semaphore per-method is
8331eliminated.
8332
8333Fixed a regression where an error was no longer emitted if a control
8334method
8335attempts to create 2 objects of the same name. This once again returns
8336AE_ALREADY_EXISTS. When this exception occurs, it invokes the mechanism
8337that
8338will dynamically serialize the control method to possible prevent future
8339errors. (BZ 440)
8340
8341Integrated a fix for a problem with PCI Express HID detection in the PCI
8342Config Space setup procedure. (BZ 7145)
8343
8344Moved all FADT-related functions to a new file, tbfadt.c. Eliminated the
8345AcpiHwInitialize function - the FADT registers are now validated when the
8346table is loaded.
8347
8348Added two new warnings during FADT verification - 1) if the FADT is
8349larger
8350than the largest known FADT version, and 2) if there is a mismatch
8351between
8352a
835332-bit block address and the 64-bit X counterpart (when both are non-
8354zero.)
8355
8356Example Code and Data Size: These are the sizes for the OS-independent
8357acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8358debug version of the code includes the debug output trace mechanism and
8359has
8360a much larger code and data size.
8361
8362  Previous Release:
8363    Non-Debug Version:  77.9K Code, 16.7K Data,  94.6K Total
8364    Debug Version:     154.9K Code, 62.6K Data, 217.5K Total
8365  Current Release:
8366    Non-Debug Version:  77.9K Code, 17.1K Data,  95.0K Total
8367    Debug Version:     154.7K Code, 63.0K Data, 217.7K Total
8368
8369
83702) iASL Compiler/Disassembler and Tools:
8371
8372Fixed a problem with the implementation of the Switch() operator where
8373the
8374temporary variable was declared too close to the actual Switch, instead
8375of
8376at method level. This could cause a problem if the Switch() operator is
8377within a while loop, causing an error on the second iteration. (BZ 460)
8378
8379Disassembler - fix for error emitted for unknown type for target of scope
8380operator. Now, ignore it and continue.
8381
8382Disassembly of an FADT now verifies the input FADT and reports any errors
8383found. Fix for proper disassembly of full-sized (ACPI 2.0) FADTs.
8384
8385Disassembly of raw data buffers with byte initialization data now
8386prefixes
8387each output line with the current buffer offset.
8388
8389Disassembly of ASF! table now includes all variable-length data fields at
8390the end of some of the subtables.
8391
8392The disassembler now emits a comment if a buffer appears to be a
8393ResourceTemplate, but cannot be disassembled as such because the EndTag
8394does
8395not appear at the very end of the buffer.
8396
8397AcpiExec - Added the "-t" command line option to enable the serialized
8398mode
8399of the AML interpreter.
8400
8401----------------------------------------
840231 August 2006. Summary of changes for version 20060831:
8403
84041) ACPI CA Core Subsystem:
8405
8406Miscellaneous fixes for the Table Manager:
8407- Correctly initialize internal common FADT for all 64-bit "X" fields
8408- Fixed a couple table mapping issues during table load
8409- Fixed a couple alignment issues for IA64
8410- Initialize input array to zero in AcpiInitializeTables
8411- Additional parameter validation for AcpiGetTable, AcpiGetTableHeader,
8412AcpiGetTableByIndex
8413
8414Change for GPE support: when a "wake" GPE is received, all wake GPEs are
8415now
8416immediately disabled to prevent the waking GPE from firing again and to
8417prevent other wake GPEs from interrupting the wake process.
8418
8419Added the AcpiGpeCount global that tracks the number of processed GPEs,
8420to
8421be used for debugging systems with a large number of ACPI interrupts.
8422
8423Implemented support for the "DMAR" ACPI table (DMA Redirection Table) in
8424both the ACPICA headers and the disassembler.
8425
8426Example Code and Data Size: These are the sizes for the OS-independent
8427acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8428debug version of the code includes the debug output trace mechanism and
8429has
8430a much larger code and data size.
8431
8432  Previous Release:
8433    Non-Debug Version:  77.8K Code, 16.5K Data,  94.3K Total
8434    Debug Version:     154.6K Code, 62.3K Data, 216.9K Total
8435  Current Release:
8436    Non-Debug Version:  77.9K Code, 16.7K Data,  94.6K Total
8437    Debug Version:     154.9K Code, 62.6K Data, 217.5K Total
8438
8439
84402) iASL Compiler/Disassembler and Tools:
8441
8442Disassembler support for the DMAR ACPI table.
8443
8444----------------------------------------
844523 August 2006. Summary of changes for version 20060823:
8446
84471) ACPI CA Core Subsystem:
8448
8449The Table Manager component has been completely redesigned and
8450reimplemented. The new design is much simpler, and reduces the overall
8451code
8452and data size of the kernel-resident ACPICA by approximately 5%. Also, it
8453is
8454now possible to obtain the ACPI tables very early during kernel
8455initialization, even before dynamic memory management is initialized.
8456(Alexey Starikovskiy, Fiodor Suietov, Bob Moore)
8457
8458Obsolete ACPICA interfaces:
8459
8460- AcpiGetFirmwareTable: Use AcpiGetTable instead (works at early kernel
8461init
8462time).
8463- AcpiLoadTable: Not needed.
8464- AcpiUnloadTable: Not needed.
8465
8466New ACPICA interfaces:
8467
8468- AcpiInitializeTables: Must be called before the table manager can be
8469used.
8470- AcpiReallocateRootTable: Used to transfer the root table to dynamically
8471allocated memory after it becomes available.
8472- AcpiGetTableByIndex: Allows the host to easily enumerate all ACPI
8473tables
8474in the RSDT/XSDT.
8475
8476Other ACPICA changes:
8477
8478- AcpiGetTableHeader returns the actual mapped table header, not a copy.
8479Use
8480AcpiOsUnmapMemory to free this mapping.
8481- AcpiGetTable returns the actual mapped table. The mapping is managed
8482internally and must not be deleted by the caller. Use of this interface
8483causes no additional dynamic memory allocation.
8484- AcpiFindRootPointer: Support for physical addressing has been
8485eliminated,
8486it appeared to be unused.
8487- The interface to AcpiOsMapMemory has changed to be consistent with the
8488other allocation interfaces.
8489- The interface to AcpiOsGetRootPointer has changed to eliminate
8490unnecessary
8491parameters.
8492- ACPI_PHYSICAL_ADDRESS is now 32 bits on 32-bit platforms, 64 bits on
849364-
8494bit platforms. Was previously 64 bits on all platforms.
8495- The interface to the ACPI Global Lock acquire/release macros have
8496changed
8497slightly since ACPICA no longer keeps a local copy of the FACS with a
8498constructed pointer to the actual global lock.
8499
8500Porting to the new table manager:
8501
8502- AcpiInitializeTables: Must be called once, and can be called anytime
8503during the OS initialization process. It allows the host to specify an
8504area
8505of memory to be used to store the internal version of the RSDT/XSDT (root
8506table). This allows the host to access ACPI tables before memory
8507management
8508is initialized and running.
8509- AcpiReallocateRootTable: Can be called after memory management is
8510running
8511to copy the root table to a dynamically allocated array, freeing up the
8512scratch memory specified in the call to AcpiInitializeTables.
8513- AcpiSubsystemInitialize: This existing interface is independent of the
8514Table Manager, and does not have to be called before the Table Manager
8515can
8516be used, it only must be called before the rest of ACPICA can be used.
8517- ACPI Tables: Some changes have been made to the names and structure of
8518the
8519actbl.h and actbl1.h header files and may require changes to existing
8520code.
8521For example, bitfields have been completely removed because of their lack
8522of
8523portability across C compilers.
8524- Update interfaces to the Global Lock acquire/release macros if local
8525versions are used. (see acwin.h)
8526
8527Obsolete files: tbconvrt.c, tbget.c, tbgetall.c, tbrsdt.c
8528
8529New files: tbfind.c
8530
8531Example Code and Data Size: These are the sizes for the OS-independent
8532acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8533debug version of the code includes the debug output trace mechanism and
8534has
8535a much larger code and data size.
8536
8537  Previous Release:
8538    Non-Debug Version:  80.7K Code, 17.9K Data,  98.6K Total
8539    Debug Version:     161.0K Code, 65.1K Data, 226.1K Total
8540  Current Release:
8541    Non-Debug Version:  77.8K Code, 16.5K Data,  94.3K Total
8542    Debug Version:     154.6K Code, 62.3K Data, 216.9K Total
8543
8544
85452) iASL Compiler/Disassembler and Tools:
8546
8547No changes for this release.
8548
8549----------------------------------------
855021 July 2006. Summary of changes for version 20060721:
8551
85521) ACPI CA Core Subsystem:
8553
8554The full source code for the ASL test suite used to validate the iASL
8555compiler and the ACPICA core subsystem is being released with the ACPICA
8556source for the first time. The source is contained in a separate package
8557and
8558consists of over 1100 files that exercise all ASL/AML operators. The
8559package
8560should appear on the Intel/ACPI web site shortly. (Valery Podrezov,
8561Fiodor
8562Suietov)
8563
8564Completed a new design and implementation for support of the ACPI Global
8565Lock. On the OS side, the global lock is now treated as a standard AML
8566mutex. Previously, multiple OS threads could "acquire" the global lock
8567simultaneously. However, this could cause the BIOS to be starved out of
8568the
8569lock - especially in cases such as the Embedded Controller driver where
8570there is a tight coupling between the OS and the BIOS.
8571
8572Implemented an optimization for the ACPI Global Lock interrupt mechanism.
8573The Global Lock interrupt handler no longer queues the execution of a
8574separate thread to signal the global lock semaphore. Instead, the
8575semaphore
8576is signaled directly from the interrupt handler.
8577
8578Implemented support within the AML interpreter for package objects that
8579contain a larger AML length (package list length) than the package
8580element
8581count. In this case, the length of the package is truncated to match the
8582package element count. Some BIOS code apparently modifies the package
8583length
8584on the fly, and this change supports this behavior. Provides
8585compatibility
8586with the MS AML interpreter. (With assistance from Fiodor Suietov)
8587
8588Implemented a temporary fix for the BankValue parameter of a Bank Field
8589to
8590support all constant values, now including the Zero and One opcodes.
8591Evaluation of this parameter must eventually be converted to a full
8592TermArg
8593evaluation. A not-implemented error is now returned (temporarily) for
8594non-
8595constant values for this parameter.
8596
8597Fixed problem reports (Fiodor Suietov) integrated:
8598- Fix for premature object deletion after CopyObject on Operation Region
8599(BZ
8600350)
8601
8602Example Code and Data Size: These are the sizes for the OS-independent
8603acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8604debug version of the code includes the debug output trace mechanism and
8605has
8606a much larger code and data size.
8607
8608  Previous Release:
8609    Non-Debug Version:  80.7K Code, 18.0K Data,  98.7K Total
8610    Debug Version:     160.9K Code, 65.1K Data, 226.0K Total
8611  Current Release:
8612    Non-Debug Version:  80.7K Code, 17.9K Data,  98.6K Total
8613    Debug Version:     161.0K Code, 65.1K Data, 226.1K Total
8614
8615
86162) iASL Compiler/Disassembler and Tools:
8617
8618No changes for this release.
8619
8620----------------------------------------
862107 July 2006. Summary of changes for version 20060707:
8622
86231) ACPI CA Core Subsystem:
8624
8625Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C compilers
8626that do not allow the initialization of address pointers within packed
8627structures - even though the hardware itself may support misaligned
8628transfers. Some of the debug data structures are packed by default to
8629minimize size.
8630
8631Added an error message for the case where AcpiOsGetThreadId() returns
8632zero.
8633A non-zero value is required by the core ACPICA code to ensure the proper
8634operation of AML mutexes and recursive control methods.
8635
8636The DSDT is now the only ACPI table that determines whether the AML
8637interpreter is in 32-bit or 64-bit mode. Not really a functional change,
8638but
8639the hooks for per-table 32/64 switching have been removed from the code.
8640A
8641clarification to the ACPI specification is forthcoming in ACPI 3.0B.
8642
8643Fixed a possible leak of an OwnerID in the error path of
8644AcpiTbInitTableDescriptor (tbinstal.c), and migrated all table OwnerID
8645deletion to a single place in AcpiTbUninstallTable to correct possible
8646leaks
8647when using the AcpiTbDeleteTablesByType interface (with assistance from
8648Lance Ortiz.)
8649
8650Fixed a problem with Serialized control methods where the semaphore
8651associated with the method could be over-signaled after multiple method
8652invocations.
8653
8654Fixed two issues with the locking of the internal namespace data
8655structure.
8656Both the Unload() operator and AcpiUnloadTable interface now lock the
8657namespace during the namespace deletion associated with the table unload
8658(with assistance from Linn Crosetto.)
8659
8660Fixed problem reports (Valery Podrezov) integrated:
8661- Eliminate unnecessary memory allocation for CreateXxxxField (BZ 5426)
8662
8663Fixed problem reports (Fiodor Suietov) integrated:
8664- Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369)
8665- On Address Space handler deletion, needless deactivation call (BZ 374)
8666- AcpiRemoveAddressSpaceHandler: validate Device handle parameter (BZ
8667375)
8668- Possible memory leak, Notify sub-objects of Processor, Power,
8669ThermalZone
8670(BZ 376)
8671- AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ 378)
8672- Minimum Length of RSDT should be validated (BZ 379)
8673- AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj has no
8674Handler (BZ (380)
8675- AcpiUnloadTable: return AE_NOT_EXIST if no table of specified type
8676loaded
8677(BZ 381)
8678
8679Example Code and Data Size: These are the sizes for the OS-independent
8680acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8681debug version of the code includes the debug output trace mechanism and
8682has
8683a much larger code and data size.
8684
8685  Previous Release:
8686    Non-Debug Version:  80.5K Code, 17.8K Data,  98.3K Total
8687    Debug Version:     160.8K Code, 64.8K Data, 225.6K Total
8688  Current Release:
8689    Non-Debug Version:  80.7K Code, 17.9K Data,  98.6K Total
8690    Debug Version:     161.0K Code, 65.1K Data, 226.1K Total
8691
8692
86932) iASL Compiler/Disassembler and Tools:
8694
8695Fixed problem reports:
8696Compiler segfault when ASL contains a long (>1024) String declaration (BZ
8697436)
8698
8699----------------------------------------
870023 June 2006. Summary of changes for version 20060623:
8701
87021) ACPI CA Core Subsystem:
8703
8704Implemented a new ACPI_SPINLOCK type for the OSL lock interfaces. This
8705allows the type to be customized to the host OS for improved efficiency
8706(since a spinlock is usually a very small object.)
8707
8708Implemented support for "ignored" bits in the ACPI registers. According
8709to
8710the ACPI specification, these bits should be preserved when writing the
8711registers via a read/modify/write cycle. There are 3 bits preserved in
8712this
8713manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11].
8714
8715Implemented the initial deployment of new OSL mutex interfaces. Since
8716some
8717host operating systems have separate mutex and semaphore objects, this
8718feature was requested. The base code now uses mutexes (and the new mutex
8719interfaces) wherever a binary semaphore was used previously. However, for
8720the current release, the mutex interfaces are defined as macros to map
8721them
8722to the existing semaphore interfaces. Therefore, no OSL changes are
8723required
8724at this time. (See acpiosxf.h)
8725
8726Fixed several problems with the support for the control method SyncLevel
8727parameter. The SyncLevel now works according to the ACPI specification
8728and
8729in concert with the Mutex SyncLevel parameter, since the current
8730SyncLevel
8731is a property of the executing thread. Mutual exclusion for control
8732methods
8733is now implemented with a mutex instead of a semaphore.
8734
8735Fixed three instances of the use of the C shift operator in the bitfield
8736support code (exfldio.c) to avoid the use of a shift value larger than
8737the
8738target data width. The behavior of C compilers is undefined in this case
8739and
8740can cause unpredictable results, and therefore the case must be detected
8741and
8742avoided. (Fiodor Suietov)
8743
8744Added an info message whenever an SSDT or OEM table is loaded dynamically
8745via the Load() or LoadTable() ASL operators. This should improve
8746debugging
8747capability since it will show exactly what tables have been loaded
8748(beyond
8749the tables present in the RSDT/XSDT.)
8750
8751Example Code and Data Size: These are the sizes for the OS-independent
8752acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8753debug version of the code includes the debug output trace mechanism and
8754has
8755a much larger code and data size.
8756
8757  Previous Release:
8758    Non-Debug Version:  80.0K Code, 17.6K Data,  97.6K Total
8759    Debug Version:     160.2K Code, 64.7K Data, 224.9K Total
8760  Current Release:
8761    Non-Debug Version:  80.5K Code, 17.8K Data,  98.3K Total
8762    Debug Version:     160.8K Code, 64.8K Data, 225.6K Total
8763
8764
87652) iASL Compiler/Disassembler and Tools:
8766
8767No changes for this release.
8768
8769----------------------------------------
877008 June 2006. Summary of changes for version 20060608:
8771
87721) ACPI CA Core Subsystem:
8773
8774Converted the locking mutex used for the ACPI hardware to a spinlock.
8775This
8776change should eliminate all problems caused by attempting to acquire a
8777semaphore at interrupt level, and it means that all ACPICA external
8778interfaces that directly access the ACPI hardware can be safely called
8779from
8780interrupt level. OSL code that implements the semaphore interfaces should
8781be
8782able to eliminate any workarounds for being called at interrupt level.
8783
8784Fixed a regression introduced in 20060526 where the ACPI device
8785initialization could be prematurely aborted with an AE_NOT_FOUND if a
8786device
8787did not have an optional _INI method.
8788
8789Fixed an IndexField issue where a write to the Data Register should be
8790limited in size to the AccessSize (width) of the IndexField itself. (BZ
8791433,
8792Fiodor Suietov)
8793
8794Fixed problem reports (Valery Podrezov) integrated:
8795- Allow store of ThermalZone objects to Debug object (BZ 5369/5370)
8796
8797Fixed problem reports (Fiodor Suietov) integrated:
8798- AcpiGetTableHeader doesn't handle multiple instances correctly (BZ 364)
8799
8800Removed four global mutexes that were obsolete and were no longer being
8801used.
8802
8803Example Code and Data Size: These are the sizes for the OS-independent
8804acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8805debug version of the code includes the debug output trace mechanism and
8806has
8807a much larger code and data size.
8808
8809  Previous Release:
8810    Non-Debug Version:  80.0K Code, 17.7K Data,  97.7K Total
8811    Debug Version:     160.3K Code, 64.9K Data, 225.2K Total
8812  Current Release:
8813    Non-Debug Version:  80.0K Code, 17.6K Data,  97.6K Total
8814    Debug Version:     160.2K Code, 64.7K Data, 224.9K Total
8815
8816
88172) iASL Compiler/Disassembler and Tools:
8818
8819Fixed a fault when using -g option (get tables from registry) on Windows
8820machines.
8821
8822Fixed problem reports integrated:
8823- Generate error if CreateField NumBits parameter is zero. (BZ 405)
8824- Fault if Offset/Length in Field unit is very large (BZ 432, Fiodor
8825Suietov)
8826- Global table revision override (-r) is ignored (BZ 413)
8827
8828----------------------------------------
882926 May 2006. Summary of changes for version 20060526:
8830
88311) ACPI CA Core Subsystem:
8832
8833Restructured, flattened, and simplified the internal interfaces for
8834namespace object evaluation - resulting in smaller code, less CPU stack
8835use,
8836and fewer interfaces. (With assistance from Mikhail Kouzmich)
8837
8838Fixed a problem with the CopyObject operator where the first parameter
8839was
8840not typed correctly for the parser, interpreter, compiler, and
8841disassembler.
8842Caused various errors and unexpected behavior.
8843
8844Fixed a problem where a ShiftLeft or ShiftRight of more than 64 bits
8845produced incorrect results with some C compilers. Since the behavior of C
8846compilers when the shift value is larger than the datatype width is
8847apparently not well defined, the interpreter now detects this condition
8848and
8849simply returns zero as expected in all such cases. (BZ 395)
8850
8851Fixed problem reports (Valery Podrezov) integrated:
8852- Update String-to-Integer conversion to match ACPI 3.0A spec (BZ 5329)
8853- Allow interpreter to handle nested method declarations (BZ 5361)
8854
8855Fixed problem reports (Fiodor Suietov) integrated:
8856- AcpiTerminate doesn't free debug memory allocation list objects (BZ
8857355)
8858- After Core Subsystem shutdown, AcpiSubsystemStatus returns AE_OK (BZ
8859356)
8860- AcpiOsUnmapMemory for RSDP can be invoked inconsistently (BZ 357)
8861- Resource Manager should return AE_TYPE for non-device objects (BZ 358)
8862- Incomplete cleanup branch in AcpiNsEvaluateRelative (BZ 359)
8863- Use AcpiOsFree instead of ACPI_FREE in AcpiRsSetSrsMethodData (BZ 360)
8864- Incomplete cleanup branch in AcpiPsParseAml (BZ 361)
8865- Incomplete cleanup branch in AcpiDsDeleteWalkState (BZ 362)
8866- AcpiGetTableHeader returns AE_NO_ACPI_TABLES until DSDT is loaded (BZ
8867365)
8868- Status of the Global Initialization Handler call not used (BZ 366)
8869- Incorrect object parameter to Global Initialization Handler (BZ 367)
8870
8871Example Code and Data Size: These are the sizes for the OS-independent
8872acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8873debug version of the code includes the debug output trace mechanism and
8874has
8875a much larger code and data size.
8876
8877  Previous Release:
8878    Non-Debug Version:  79.8K Code, 17.7K Data,  97.5K Total
8879    Debug Version:     160.5K Code, 65.1K Data, 225.6K Total
8880  Current Release:
8881    Non-Debug Version:  80.0K Code, 17.7K Data,  97.7K Total
8882    Debug Version:     160.3K Code, 64.9K Data, 225.2K Total
8883
8884
88852) iASL Compiler/Disassembler and Tools:
8886
8887Modified the parser to allow the names IO, DMA, and IRQ to be used as
8888namespace identifiers with no collision with existing resource descriptor
8889macro names. This provides compatibility with other ASL compilers and is
8890most useful for disassembly/recompilation of existing tables without
8891parse
8892errors. (With assistance from Thomas Renninger)
8893
8894Disassembler: fixed an incorrect disassembly problem with the
8895DataTableRegion and CopyObject operators. Fixed a possible fault during
8896disassembly of some Alias operators.
8897
8898----------------------------------------
889912 May 2006. Summary of changes for version 20060512:
8900
89011) ACPI CA Core Subsystem:
8902
8903Replaced the AcpiOsQueueForExecution interface with a new interface named
8904AcpiOsExecute. The major difference is that the new interface does not
8905have
8906a Priority parameter, this appeared to be useless and has been replaced
8907by
8908a
8909Type parameter. The Type tells the host what type of execution is being
8910requested, such as global lock handler, notify handler, GPE handler, etc.
8911This allows the host to queue and execute the request as appropriate for
8912the
8913request type, possibly using different work queues and different
8914priorities
8915for the various request types. This enables fixes for multithreading
8916deadlock problems such as BZ #5534, and will require changes to all
8917existing
8918OS interface layers. (Alexey Starikovskiy and Bob Moore)
8919
8920Fixed a possible memory leak associated with the support for the so-
8921called
8922"implicit return" ACPI extension. Reported by FreeBSD, BZ #6514. (Fiodor
8923Suietov)
8924
8925Fixed a problem with the Load() operator where a table load from an
8926operation region could overwrite an internal table buffer by up to 7
8927bytes
8928and cause alignment faults on IPF systems. (With assistance from Luming
8929Yu)
8930
8931Example Code and Data Size: These are the sizes for the OS-independent
8932acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8933debug version of the code includes the debug output trace mechanism and
8934has
8935a much larger code and data size.
8936
8937  Previous Release:
8938    Non-Debug Version:  79.7K Code, 17.7K Data,  97.4K Total
8939    Debug Version:     160.1K Code, 65.2K Data, 225.3K Total
8940  Current Release:
8941    Non-Debug Version:  79.8K Code, 17.7K Data,  97.5K Total
8942    Debug Version:     160.5K Code, 65.1K Data, 225.6K Total
8943
8944
8945
89462) iASL Compiler/Disassembler and Tools:
8947
8948Disassembler: Implemented support to cross reference the internal
8949namespace
8950and automatically generate ASL External() statements for symbols not
8951defined
8952within the current table being disassembled. This will simplify the
8953disassembly and recompilation of interdependent tables such as SSDTs
8954since
8955these statements will no longer have to be added manually.
8956
8957Disassembler: Implemented experimental support to automatically detect
8958invocations of external control methods and generate appropriate
8959External()
8960statements. This is problematic because the AML cannot be correctly
8961parsed
8962until the number of arguments for each control method is known.
8963Currently,
8964standalone method invocations and invocations as the source operand of a
8965Store() statement are supported.
8966
8967Disassembler: Implemented support for the ASL pseudo-operators LNotEqual,
8968LLessEqual, and LGreaterEqual. Previously disassembled as LNot(LEqual()),
8969LNot(LGreater()), and LNot(LLess()), this makes the disassembled ASL code
8970more readable and likely closer to the original ASL source.
8971
8972----------------------------------------
897321 April 2006. Summary of changes for version 20060421:
8974
89751) ACPI CA Core Subsystem:
8976
8977Removed a device initialization optimization introduced in 20051216 where
8978the _STA method was not run unless an _INI was also present for the same
8979device. This optimization could cause problems because it could allow
8980_INI
8981methods to be run within a not-present device subtree. (If a not-present
8982device had no _INI, _STA would not be run, the not-present status would
8983not
8984be discovered, and the children of the device would be incorrectly
8985traversed.)
8986
8987Implemented a new _STA optimization where namespace subtrees that do not
8988contain _INI are identified and ignored during device initialization.
8989Selectively running _STA can significantly improve boot time on large
8990machines (with assistance from Len Brown.)
8991
8992Implemented support for the device initialization case where the returned
8993_STA flags indicate a device not-present but functioning. In this case,
8994_INI
8995is not run, but the device children are examined for presence, as per the
8996ACPI specification.
8997
8998Implemented an additional change to the IndexField support in order to
8999conform to MS behavior. The value written to the Index Register is not
9000simply a byte offset, it is a byte offset in units of the access width of
9001the parent Index Field. (Fiodor Suietov)
9002
9003Defined and deployed a new OSL interface, AcpiOsValidateAddress. This
9004interface is called during the creation of all AML operation regions, and
9005allows the host OS to exert control over what addresses it will allow the
9006AML code to access. Operation Regions whose addresses are disallowed will
9007cause a runtime exception when they are actually accessed (will not
9008affect
9009or abort table loading.) See oswinxf or osunixxf for an example
9010implementation.
9011
9012Defined and deployed a new OSL interface, AcpiOsValidateInterface. This
9013interface allows the host OS to match the various "optional"
9014interface/behavior strings for the _OSI predefined control method as
9015appropriate (with assistance from Bjorn Helgaas.) See oswinxf or osunixxf
9016for an example implementation.
9017
9018Restructured and corrected various problems in the exception handling
9019code
9020paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod
9021(with assistance from Takayoshi Kochi.)
9022
9023Modified the Linux source converter to ignore quoted string literals
9024while
9025converting identifiers from mixed to lower case. This will correct
9026problems
9027with the disassembler and other areas where such strings must not be
9028modified.
9029
9030The ACPI_FUNCTION_* macros no longer require quotes around the function
9031name. This allows the Linux source converter to convert the names, now
9032that
9033the converter ignores quoted strings.
9034
9035Example Code and Data Size: These are the sizes for the OS-independent
9036acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9037debug version of the code includes the debug output trace mechanism and
9038has
9039a much larger code and data size.
9040
9041  Previous Release:
9042
9043    Non-Debug Version:  81.1K Code, 17.7K Data,  98.8K Total
9044    Debug Version:     158.9K Code, 64.9K Data, 223.8K Total
9045  Current Release:
9046    Non-Debug Version:  79.7K Code, 17.7K Data,  97.4K Total
9047    Debug Version:     160.1K Code, 65.2K Data, 225.3K Total
9048
9049
90502) iASL Compiler/Disassembler and Tools:
9051
9052Implemented 3 new warnings for iASL, and implemented multiple warning
9053levels
9054(w2 flag).
9055
90561) Ignored timeouts: If the TimeoutValue parameter to Wait or Acquire is
9057not
9058WAIT_FOREVER (0xFFFF) and the code does not examine the return value to
9059check for the possible timeout, a warning is issued.
9060
90612) Useless operators: If an ASL operator does not specify an optional
9062target
9063operand and it also does not use the function return value from the
9064operator, a warning is issued since the operator effectively does
9065nothing.
9066
90673) Unreferenced objects: If a namespace object is created, but never
9068referenced, a warning is issued. This is a warning level 2 since there
9069are
9070cases where this is ok, such as when a secondary table is loaded that
9071uses
9072the unreferenced objects. Even so, care is taken to only flag objects
9073that
9074don't look like they will ever be used. For example, the reserved methods
9075(starting with an underscore) are usually not referenced because it is
9076expected that the OS will invoke them.
9077
9078----------------------------------------
907931 March 2006. Summary of changes for version 20060331:
9080
90811) ACPI CA Core Subsystem:
9082
9083Implemented header file support for the following additional ACPI tables:
9084ASF!, BOOT, CPEP, DBGP, MCFG, SPCR, SPMI, TCPA, and WDRT. With this
9085support,
9086all current and known ACPI tables are now defined in the ACPICA headers
9087and
9088are available for use by device drivers and other software.
9089
9090Implemented support to allow tables that contain ACPI names with invalid
9091characters to be loaded. Previously, this would cause the table load to
9092fail, but since there are several known cases of such tables on existing
9093machines, this change was made to enable ACPI support for them. Also,
9094this
9095matches the behavior of the Microsoft ACPI implementation.
9096
9097Fixed a couple regressions introduced during the memory optimization in
9098the
909920060317 release. The namespace node definition required additional
9100reorganization and an internal datatype that had been changed to 8-bit
9101was
9102restored to 32-bit. (Valery Podrezov)
9103
9104Fixed a problem where a null pointer passed to AcpiUtDeleteGenericState
9105could be passed through to AcpiOsReleaseObject which is unexpected. Such
9106null pointers are now trapped and ignored, matching the behavior of the
9107previous implementation before the deployment of AcpiOsReleaseObject.
9108(Valery Podrezov, Fiodor Suietov)
9109
9110Fixed a memory mapping leak during the deletion of a SystemMemory
9111operation
9112region where a cached memory mapping was not deleted. This became a
9113noticeable problem for operation regions that are defined within
9114frequently
9115used control methods. (Dana Meyers)
9116
9117Reorganized the ACPI table header files into two main files: one for the
9118ACPI tables consumed by the ACPICA core, and another for the
9119miscellaneous
9120ACPI tables that are consumed by the drivers and other software. The
9121various
9122FADT definitions were merged into one common section and three different
9123tables (ACPI 1.0, 1.0+, and 2.0)
9124
9125Example Code and Data Size: These are the sizes for the OS-independent
9126acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9127debug version of the code includes the debug output trace mechanism and
9128has
9129a much larger code and data size.
9130
9131  Previous Release:
9132    Non-Debug Version:  80.9K Code, 17.7K Data,  98.6K Total
9133    Debug Version:     158.7K Code, 64.8K Data, 223.5K Total
9134  Current Release:
9135    Non-Debug Version:  81.1K Code, 17.7K Data,  98.8K Total
9136    Debug Version:     158.9K Code, 64.9K Data, 223.8K Total
9137
9138
91392) iASL Compiler/Disassembler and Tools:
9140
9141Disassembler: Implemented support to decode and format all non-AML ACPI
9142tables (tables other than DSDTs and SSDTs.) This includes the new tables
9143added to the ACPICA headers, therefore all current and known ACPI tables
9144are
9145supported.
9146
9147Disassembler: The change to allow ACPI names with invalid characters also
9148enables the disassembly of such tables. Invalid characters within names
9149are
9150changed to '*' to make the name printable; the iASL compiler will still
9151generate an error for such names, however, since this is an invalid ACPI
9152character.
9153
9154Implemented an option for AcpiXtract (-a) to extract all tables found in
9155the
9156input file. The default invocation extracts only the DSDTs and SSDTs.
9157
9158Fixed a couple of gcc generation issues for iASL and AcpiExec and added a
9159makefile for the AcpiXtract utility.
9160
9161----------------------------------------
916217 March 2006. Summary of changes for version 20060317:
9163
91641) ACPI CA Core Subsystem:
9165
9166Implemented the use of a cache object for all internal namespace nodes.
9167Since there are about 1000 static nodes in a typical system, this will
9168decrease memory use for cache implementations that minimize per-
9169allocation
9170overhead (such as a slab allocator.)
9171
9172Removed the reference count mechanism for internal namespace nodes, since
9173it
9174was deemed unnecessary. This reduces the size of each namespace node by
9175about 5%-10% on all platforms. Nodes are now 20 bytes for the 32-bit
9176case,
9177and 32 bytes for the 64-bit case.
9178
9179Optimized several internal data structures to reduce object size on 64-
9180bit
9181platforms by packing data within the 64-bit alignment. This includes the
9182frequently used ACPI_OPERAND_OBJECT, of which there can be ~1000 static
9183instances corresponding to the namespace objects.
9184
9185Added two new strings for the predefined _OSI method: "Windows 2001.1
9186SP1"
9187and "Windows 2006".
9188
9189Split the allocation tracking mechanism out to a separate file, from
9190utalloc.c to uttrack.c. This mechanism appears to be only useful for
9191application-level code. Kernels may wish to not include uttrack.c in
9192distributions.
9193
9194Removed all remnants of the obsolete ACPI_REPORT_* macros and the
9195associated
9196code. (These macros have been replaced by the ACPI_ERROR and ACPI_WARNING
9197macros.)
9198
9199Code and Data Size: These are the sizes for the acpica.lib produced by
9200the
9201Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
9202ACPI
9203driver or OSPM code. The debug version of the code includes the debug
9204output
9205trace mechanism and has a much larger code and data size. Note that these
9206values will vary depending on the efficiency of the compiler and the
9207compiler options used during generation.
9208
9209  Previous Release:
9210    Non-Debug Version:  81.1K Code, 17.8K Data,  98.9K Total
9211    Debug Version:     161.6K Code, 65.7K Data, 227.3K Total
9212  Current Release:
9213    Non-Debug Version:  80.9K Code, 17.7K Data,  98.6K Total
9214    Debug Version:     158.7K Code, 64.8K Data, 223.5K Total
9215
9216
92172) iASL Compiler/Disassembler and Tools:
9218
9219Implemented an ANSI C version of the acpixtract utility. This version
9220will
9221automatically extract the DSDT and all SSDTs from the input acpidump text
9222file and dump the binary output to separate files. It can also display a
9223summary of the input file including the headers for each table found and
9224will extract any single ACPI table, with any signature. (See
9225source/tools/acpixtract)
9226
9227----------------------------------------
922810 March 2006. Summary of changes for version 20060310:
9229
92301) ACPI CA Core Subsystem:
9231
9232Tagged all external interfaces to the subsystem with the new
9233ACPI_EXPORT_SYMBOL macro. This macro can be defined as necessary to
9234assist
9235kernel integration. For Linux, the macro resolves to the EXPORT_SYMBOL
9236macro. The default definition is NULL.
9237
9238Added the ACPI_THREAD_ID type for the return value from
9239AcpiOsGetThreadId.
9240This allows the host to define this as necessary to simplify kernel
9241integration. The default definition is ACPI_NATIVE_UINT.
9242
9243Fixed two interpreter problems related to error processing, the deletion
9244of
9245objects, and placing invalid pointers onto the internal operator result
9246stack. BZ 6028, 6151 (Valery Podrezov)
9247
9248Increased the reference count threshold where a warning is emitted for
9249large
9250reference counts in order to eliminate unnecessary warnings on systems
9251with
9252large namespaces (especially 64-bit.) Increased the value from 0x400 to
92530x800.
9254
9255Due to universal disagreement as to the meaning of the 'c' in the
9256calloc()
9257function, the ACPI_MEM_CALLOCATE macro has been renamed to
9258ACPI_ALLOCATE_ZEROED so that the purpose of the interface is 'clear'.
9259ACPI_MEM_ALLOCATE and ACPI_MEM_FREE are renamed to ACPI_ALLOCATE and
9260ACPI_FREE.
9261
9262Code and Data Size: These are the sizes for the acpica.lib produced by
9263the
9264Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
9265ACPI
9266driver or OSPM code. The debug version of the code includes the debug
9267output
9268trace mechanism and has a much larger code and data size. Note that these
9269values will vary depending on the efficiency of the compiler and the
9270compiler options used during generation.
9271
9272  Previous Release:
9273    Non-Debug Version:  81.0K Code, 17.8K Data,  98.8K Total
9274    Debug Version:     161.4K Code, 65.7K Data, 227.1K Total
9275  Current Release:
9276    Non-Debug Version:  81.1K Code, 17.8K Data,  98.9K Total
9277    Debug Version:     161.6K Code, 65.7K Data, 227.3K Total
9278
9279
92802) iASL Compiler/Disassembler:
9281
9282Disassembler: implemented support for symbolic resource descriptor
9283references. If a CreateXxxxField operator references a fixed offset
9284within
9285a
9286resource descriptor, a name is assigned to the descriptor and the offset
9287is
9288translated to the appropriate resource tag and pathname. The addition of
9289this support brings the disassembled code very close to the original ASL
9290source code and helps eliminate run-time errors when the disassembled
9291code
9292is modified (and recompiled) in such a way as to invalidate the original
9293fixed offsets.
9294
9295Implemented support for a Descriptor Name as the last parameter to the
9296ASL
9297Register() macro. This parameter was inadvertently left out of the ACPI
9298specification, and will be added for ACPI 3.0b.
9299
9300Fixed a problem where the use of the "_OSI" string (versus the full path
9301"\_OSI") caused an internal compiler error. ("No back ptr to op")
9302
9303Fixed a problem with the error message that occurs when an invalid string
9304is
9305used for a _HID object (such as one with an embedded asterisk:
9306"*PNP010A".)
9307The correct message is now displayed.
9308
9309----------------------------------------
931017 February 2006. Summary of changes for version 20060217:
9311
93121) ACPI CA Core Subsystem:
9313
9314Implemented a change to the IndexField support to match the behavior of
9315the
9316Microsoft AML interpreter. The value written to the Index register is now
9317a
9318byte offset, no longer an index based upon the width of the Data
9319register.
9320This should fix IndexField problems seen on some machines where the Data
9321register is not exactly one byte wide. The ACPI specification will be
9322clarified on this point.
9323
9324Fixed a problem where several resource descriptor types could overrun the
9325internal descriptor buffer due to size miscalculation: VendorShort,
9326VendorLong, and Interrupt. This was noticed on IA64 machines, but could
9327affect all platforms.
9328
9329Fixed a problem where individual resource descriptors were misaligned
9330within
9331the internal buffer, causing alignment faults on IA64 platforms.
9332
9333Code and Data Size: These are the sizes for the acpica.lib produced by
9334the
9335Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
9336ACPI
9337driver or OSPM code. The debug version of the code includes the debug
9338output
9339trace mechanism and has a much larger code and data size. Note that these
9340values will vary depending on the efficiency of the compiler and the
9341compiler options used during generation.
9342
9343  Previous Release:
9344    Non-Debug Version:  81.1K Code, 17.8K Data,  98.9K Total
9345    Debug Version:     161.3K Code, 65.6K Data, 226.9K Total
9346  Current Release:
9347    Non-Debug Version:  81.0K Code, 17.8K Data,  98.8K Total
9348    Debug Version:     161.4K Code, 65.7K Data, 227.1K Total
9349
9350
93512) iASL Compiler/Disassembler:
9352
9353Implemented support for new reserved names: _WDG and _WED are Microsoft
9354extensions for Windows Instrumentation Management, _TDL is a new ACPI-
9355defined method (Throttling Depth Limit.)
9356
9357Fixed a problem where a zero-length VendorShort or VendorLong resource
9358descriptor was incorrectly emitted as a descriptor of length one.
9359
9360----------------------------------------
936110 February 2006. Summary of changes for version 20060210:
9362
93631) ACPI CA Core Subsystem:
9364
9365Removed a couple of extraneous ACPI_ERROR messages that appeared during
9366normal execution. These became apparent after the conversion from
9367ACPI_DEBUG_PRINT.
9368
9369Fixed a problem where the CreateField operator could hang if the BitIndex
9370or
9371NumBits parameter referred to a named object. (Valery Podrezov, BZ 5359)
9372
9373Fixed a problem where a DeRefOf operation on a buffer object incorrectly
9374failed with an exception. This also fixes a couple of related RefOf and
9375DeRefOf issues. (Valery Podrezov, BZ 5360/5392/5387)
9376
9377Fixed a problem where the AE_BUFFER_LIMIT exception was returned instead
9378of
9379AE_STRING_LIMIT on an out-of-bounds Index() operation. (Valery Podrezov,
9380BZ
93815480)
9382
9383Implemented a memory cleanup at the end of the execution of each
9384iteration
9385of an AML While() loop, preventing the accumulation of outstanding
9386objects.
9387(Valery Podrezov, BZ 5427)
9388
9389Eliminated a chunk of duplicate code in the object resolution code.
9390(Valery
9391Podrezov, BZ 5336)
9392
9393Fixed several warnings during the 64-bit code generation.
9394
9395The AcpiSrc source code conversion tool now inserts one line of
9396whitespace
9397after an if() statement that is followed immediately by a comment,
9398improving
9399readability of the Linux code.
9400
9401Code and Data Size: The current and previous library sizes for the core
9402subsystem are shown below. These are the code and data sizes for the
9403acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
9404These
9405values do not include any ACPI driver or OSPM code. The debug version of
9406the
9407code includes the debug output trace mechanism and has a much larger code
9408and data size. Note that these values will vary depending on the
9409efficiency
9410of the compiler and the compiler options used during generation.
9411
9412  Previous Release:
9413    Non-Debug Version:  81.0K Code, 17.9K Data,  98.9K Total
9414    Debug Version:     161.3K Code, 65.7K Data, 227.0K Total
9415  Current Release:
9416    Non-Debug Version:  81.1K Code, 17.8K Data,  98.9K Total
9417    Debug Version:     161.3K Code, 65.6K Data, 226.9K Total
9418
9419
94202) iASL Compiler/Disassembler:
9421
9422Fixed a problem with the disassembly of a BankField operator with a
9423complex
9424expression for the BankValue parameter.
9425
9426----------------------------------------
942727 January 2006. Summary of changes for version 20060127:
9428
94291) ACPI CA Core Subsystem:
9430
9431Implemented support in the Resource Manager to allow unresolved
9432namestring
9433references within resource package objects for the _PRT method. This
9434support
9435is in addition to the previously implemented unresolved reference support
9436within the AML parser. If the interpreter slack mode is enabled, these
9437unresolved references will be passed through to the caller as a NULL
9438package
9439entry.
9440
9441Implemented and deployed new macros and functions for error and warning
9442messages across the subsystem. These macros are simpler and generate less
9443code than their predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
9444ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_* macros. The older
9445macros remain defined to allow ACPI drivers time to migrate to the new
9446macros.
9447
9448Implemented the ACPI_CPU_FLAGS type to simplify host OS integration of
9449the
9450Acquire/Release Lock OSL interfaces.
9451
9452Fixed a problem where Alias ASL operators are sometimes not correctly
9453resolved, in both the interpreter and the iASL compiler.
9454
9455Fixed several problems with the implementation of the
9456ConcatenateResTemplate
9457ASL operator. As per the ACPI specification, zero length buffers are now
9458treated as a single EndTag. One-length buffers always cause a fatal
9459exception. Non-zero length buffers that do not end with a full 2-byte
9460EndTag
9461cause a fatal exception.
9462
9463Fixed a possible structure overwrite in the AcpiGetObjectInfo external
9464interface. (With assistance from Thomas Renninger)
9465
9466Code and Data Size: The current and previous library sizes for the core
9467subsystem are shown below. These are the code and data sizes for the
9468acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
9469These
9470values do not include any ACPI driver or OSPM code. The debug version of
9471the
9472code includes the debug output trace mechanism and has a much larger code
9473and data size. Note that these values will vary depending on the
9474efficiency
9475of the compiler and the compiler options used during generation.
9476
9477  Previous Release:
9478    Non-Debug Version:  83.1K Code, 18.4K Data, 101.5K Total
9479    Debug Version:     163.2K Code, 66.2K Data, 229.4K Total
9480  Current Release:
9481    Non-Debug Version:  81.0K Code, 17.9K Data,  98.9K Total
9482    Debug Version:     161.3K Code, 65.7K Data, 227.0K Total
9483
9484
94852) iASL Compiler/Disassembler:
9486
9487Fixed an internal error that was generated for any forward references to
9488ASL
9489Alias objects.
9490
9491----------------------------------------
949213 January 2006. Summary of changes for version 20060113:
9493
94941) ACPI CA Core Subsystem:
9495
9496Added 2006 copyright to all module headers and signons. This affects
9497virtually every file in the ACPICA core subsystem, iASL compiler, and the
9498utilities.
9499
9500Enhanced the ACPICA error reporting in order to simplify user migration
9501to
9502the non-debug version of ACPICA. Replaced all instances of the
9503ACPI_DEBUG_PRINT macro invoked at the ACPI_DB_ERROR and ACPI_DB_WARN
9504debug
9505levels with the ACPI_REPORT_ERROR and ACPI_REPORT_WARNING macros,
9506respectively. This preserves all error and warning messages in the non-
9507debug
9508version of the ACPICA code (this has been referred to as the "debug lite"
9509option.) Over 200 cases were converted to create a total of over 380
9510error/warning messages across the ACPICA code. This increases the code
9511and
9512data size of the default non-debug version of the code somewhat (about
951313K),
9514but all error/warning reporting may be disabled if desired (and code
9515eliminated) by specifying the ACPI_NO_ERROR_MESSAGES compile-time
9516configuration option. The size of the debug version of ACPICA remains
9517about
9518the same.
9519
9520Fixed a memory leak within the AML Debugger "Set" command. One object was
9521not properly deleted for every successful invocation of the command.
9522
9523Code and Data Size: The current and previous library sizes for the core
9524subsystem are shown below. These are the code and data sizes for the
9525acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
9526These
9527values do not include any ACPI driver or OSPM code. The debug version of
9528the
9529code includes the debug output trace mechanism and has a much larger code
9530and data size. Note that these values will vary depending on the
9531efficiency
9532of the compiler and the compiler options used during generation.
9533
9534  Previous Release:
9535    Non-Debug Version:  76.6K Code, 12.3K Data,  88.9K Total
9536    Debug Version:     163.7K Code, 67.5K Data, 231.2K Total
9537  Current Release:
9538    Non-Debug Version:  83.1K Code, 18.4K Data, 101.5K Total
9539    Debug Version:     163.2K Code, 66.2K Data, 229.4K Total
9540
9541
95422) iASL Compiler/Disassembler:
9543
9544The compiler now officially supports the ACPI 3.0a specification that was
9545released on December 30, 2005. (Specification is available at
9546www.acpi.info)
9547
9548----------------------------------------
954916 December 2005. Summary of changes for version 20051216:
9550
95511) ACPI CA Core Subsystem:
9552
9553Implemented optional support to allow unresolved names within ASL Package
9554objects. A null object is inserted in the package when a named reference
9555cannot be located in the current namespace. Enabled via the interpreter
9556slack flag, this should eliminate AE_NOT_FOUND exceptions seen on
9557machines
9558that contain such code.
9559
9560Implemented an optimization to the initialization sequence that can
9561improve
9562boot time. During ACPI device initialization, the _STA method is now run
9563if
9564and only if the _INI method exists. The _STA method is used to determine
9565if
9566the device is present; An _INI can only be run if _STA returns present,
9567but
9568it is a waste of time to run the _STA method if the _INI does not exist.
9569(Prototype and assistance from Dong Wei)
9570
9571Implemented use of the C99 uintptr_t for the pointer casting macros if it
9572is
9573available in the current compiler. Otherwise, the default (void *) cast
9574is
9575used as before.
9576
9577Fixed some possible memory leaks found within the execution path of the
9578Break, Continue, If, and CreateField operators. (Valery Podrezov)
9579
9580Fixed a problem introduced in the 20051202 release where an exception is
9581generated during method execution if a control method attempts to declare
9582another method.
9583
9584Moved resource descriptor string constants that are used by both the AML
9585disassembler and AML debugger to the common utilities directory so that
9586these components are independent.
9587
9588Implemented support in the AcpiExec utility (-e switch) to globally
9589ignore
9590exceptions during control method execution (method is not aborted.)
9591
9592Added the rsinfo.c source file to the AcpiExec makefile for Linux/Unix
9593generation.
9594
9595Code and Data Size: The current and previous library sizes for the core
9596subsystem are shown below. These are the code and data sizes for the
9597acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
9598These
9599values do not include any ACPI driver or OSPM code. The debug version of
9600the
9601code includes the debug output trace mechanism and has a much larger code
9602and data size. Note that these values will vary depending on the
9603efficiency
9604of the compiler and the compiler options used during generation.
9605
9606  Previous Release:
9607    Non-Debug Version:  76.3K Code, 12.3K Data,  88.6K Total
9608    Debug Version:     163.2K Code, 67.4K Data, 230.6K Total
9609  Current Release:
9610    Non-Debug Version:  76.6K Code, 12.3K Data,  88.9K Total
9611    Debug Version:     163.7K Code, 67.5K Data, 231.2K Total
9612
9613
96142) iASL Compiler/Disassembler:
9615
9616Fixed a problem where a CPU stack overflow fault could occur if a
9617recursive
9618method call was made from within a Return statement.
9619
9620----------------------------------------
962102 December 2005. Summary of changes for version 20051202:
9622
96231) ACPI CA Core Subsystem:
9624
9625Modified the parsing of control methods to no longer create namespace
9626objects during the first pass of the parse. Objects are now created only
9627during the execute phase, at the moment the namespace creation operator
9628is
9629encountered in the AML (Name, OperationRegion, CreateByteField, etc.)
9630This
9631should eliminate ALREADY_EXISTS exceptions seen on some machines where
9632reentrant control methods are protected by an AML mutex. The mutex will
9633now
9634correctly block multiple threads from attempting to create the same
9635object
9636more than once.
9637
9638Increased the number of available Owner Ids for namespace object tracking
9639from 32 to 255. This should eliminate the OWNER_ID_LIMIT exceptions seen
9640on
9641some machines with a large number of ACPI tables (either static or
9642dynamic).
9643
9644Fixed a problem with the AcpiExec utility where a fault could occur when
9645the
9646-b switch (batch mode) is used.
9647
9648Enhanced the namespace dump routine to output the owner ID for each
9649namespace object.
9650
9651Code and Data Size: The current and previous library sizes for the core
9652subsystem are shown below. These are the code and data sizes for the
9653acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
9654These
9655values do not include any ACPI driver or OSPM code. The debug version of
9656the
9657code includes the debug output trace mechanism and has a much larger code
9658and data size. Note that these values will vary depending on the
9659efficiency
9660of the compiler and the compiler options used during generation.
9661
9662  Previous Release:
9663    Non-Debug Version:  76.3K Code, 12.3K Data,  88.6K Total
9664    Debug Version:     163.0K Code, 67.4K Data, 230.4K Total
9665  Current Release:
9666    Non-Debug Version:  76.3K Code, 12.3K Data,  88.6K Total
9667    Debug Version:     163.2K Code, 67.4K Data, 230.6K Total
9668
9669
96702) iASL Compiler/Disassembler:
9671
9672Fixed a parse error during compilation of certain Switch/Case constructs.
9673To
9674simplify the parse, the grammar now allows for multiple Default
9675statements
9676and this error is now detected and flagged during the analysis phase.
9677
9678Disassembler: The disassembly now includes the contents of the original
9679table header within a comment at the start of the file. This includes the
9680name and version of the original ASL compiler.
9681
9682----------------------------------------
968317 November 2005. Summary of changes for version 20051117:
9684
96851) ACPI CA Core Subsystem:
9686
9687Fixed a problem in the AML parser where the method thread count could be
9688decremented below zero if any errors occurred during the method parse
9689phase.
9690This should eliminate AE_AML_METHOD_LIMIT exceptions seen on some
9691machines.
9692This also fixed a related regression with the mechanism that detects and
9693corrects methods that cannot properly handle reentrancy (related to the
9694deployment of the new OwnerId mechanism.)
9695
9696Eliminated the pre-parsing of control methods (to detect errors) during
9697table load. Related to the problem above, this was causing unwind issues
9698if
9699any errors occurred during the parse, and it seemed to be overkill. A
9700table
9701load should not be aborted if there are problems with any single control
9702method, thus rendering this feature rather pointless.
9703
9704Fixed a problem with the new table-driven resource manager where an
9705internal
9706buffer overflow could occur for small resource templates.
9707
9708Implemented a new external interface, AcpiGetVendorResource. This
9709interface
9710will find and return a vendor-defined resource descriptor within a _CRS
9711or
9712_PRS method via an ACPI 3.0 UUID match. With assistance from Bjorn
9713Helgaas.
9714
9715Removed the length limit (200) on string objects as per the upcoming ACPI
97163.0A specification. This affects the following areas of the interpreter:
97171)
9718any implicit conversion of a Buffer to a String, 2) a String object
9719result
9720of the ASL Concatentate operator, 3) the String object result of the ASL
9721ToString operator.
9722
9723Fixed a problem in the Windows OS interface layer (OSL) where a
9724WAIT_FOREVER
9725on a semaphore object would incorrectly timeout. This allows the
9726multithreading features of the AcpiExec utility to work properly under
9727Windows.
9728
9729Updated the Linux makefiles for the iASL compiler and AcpiExec to include
9730the recently added file named "utresrc.c".
9731
9732Code and Data Size: The current and previous library sizes for the core
9733subsystem are shown below. These are the code and data sizes for the
9734acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
9735These
9736values do not include any ACPI driver or OSPM code. The debug version of
9737the
9738code includes the debug output trace mechanism and has a much larger code
9739and data size. Note that these values will vary depending on the
9740efficiency
9741of the compiler and the compiler options used during generation.
9742
9743  Previous Release:
9744    Non-Debug Version:  76.2K Code, 12.3K Data,  88.5K Total
9745    Debug Version:     163.0K Code, 67.4K Data, 230.4K Total
9746  Current Release:
9747    Non-Debug Version:  76.3K Code, 12.3K Data,  88.6K Total
9748    Debug Version:     163.0K Code, 67.4K Data, 230.4K Total
9749
9750
97512) iASL Compiler/Disassembler:
9752
9753Removed the limit (200) on string objects as per the upcoming ACPI 3.0A
9754specification. For the iASL compiler, this means that string literals
9755within
9756the source ASL can be of any length.
9757
9758Enhanced the listing output to dump the AML code for resource descriptors
9759immediately after the ASL code for each descriptor, instead of in a block
9760at
9761the end of the entire resource template.
9762
9763Enhanced the compiler debug output to dump the entire original parse tree
9764constructed during the parse phase, before any transforms are applied to
9765the
9766tree. The transformed tree is dumped also.
9767
9768----------------------------------------
976902 November 2005. Summary of changes for version 20051102:
9770
97711) ACPI CA Core Subsystem:
9772
9773Modified the subsystem initialization sequence to improve GPE support.
9774The
9775GPE initialization has been split into two parts in order to defer
9776execution
9777of the _PRW methods (Power Resources for Wake) until after the hardware
9778is
9779fully initialized and the SCI handler is installed. This allows the _PRW
9780methods to access fields protected by the Global Lock. This will fix
9781systems
9782where a NO_GLOBAL_LOCK exception has been seen during initialization.
9783
9784Converted the ACPI internal object disassemble and display code within
9785the
9786AML debugger to fully table-driven operation, reducing code size and
9787increasing maintainability.
9788
9789Fixed a regression with the ConcatenateResTemplate() ASL operator
9790introduced
9791in the 20051021 release.
9792
9793Implemented support for "local" internal ACPI object types within the
9794debugger "Object" command and the AcpiWalkNamespace external interfaces.
9795These local types include RegionFields, BankFields, IndexFields, Alias,
9796and
9797reference objects.
9798
9799Moved common AML resource handling code into a new file, "utresrc.c".
9800This
9801code is shared by both the Resource Manager and the AML Debugger.
9802
9803Code and Data Size: The current and previous library sizes for the core
9804subsystem are shown below. These are the code and data sizes for the
9805acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
9806These
9807values do not include any ACPI driver or OSPM code. The debug version of
9808the
9809code includes the debug output trace mechanism and has a much larger code
9810and data size. Note that these values will vary depending on the
9811efficiency
9812of the compiler and the compiler options used during generation.
9813
9814  Previous Release:
9815    Non-Debug Version:  76.1K Code, 12.2K Data,  88.3K Total
9816    Debug Version:     163.5K Code, 67.0K Data, 230.5K Total
9817  Current Release:
9818    Non-Debug Version:  76.2K Code, 12.3K Data,  88.5K Total
9819    Debug Version:     163.0K Code, 67.4K Data, 230.4K Total
9820
9821
98222) iASL Compiler/Disassembler:
9823
9824Fixed a problem with very large initializer lists (more than 4000
9825elements)
9826for both Buffer and Package objects where the parse stack could overflow.
9827
9828Enhanced the pre-compile source code scan for non-ASCII characters to
9829ignore
9830characters within comment fields. The scan is now always performed and is
9831no
9832longer optional, detecting invalid characters within a source file
9833immediately rather than during the parse phase or later.
9834
9835Enhanced the ASL grammar definition to force early reductions on all
9836list-
9837style grammar elements so that the overall parse stack usage is greatly
9838reduced. This should improve performance and reduce the possibility of
9839parse
9840stack overflow.
9841
9842Eliminated all reduce/reduce conflicts in the iASL parser generation.
9843Also,
9844with the addition of a %expected statement, the compiler generates from
9845source with no warnings.
9846
9847Fixed a possible segment fault in the disassembler if the input filename
9848does not contain a "dot" extension (Thomas Renninger).
9849
9850----------------------------------------
985121 October 2005. Summary of changes for version 20051021:
9852
98531) ACPI CA Core Subsystem:
9854
9855Implemented support for the EM64T and other x86-64 processors. This
9856essentially entails recognizing that these processors support non-aligned
9857memory transfers. Previously, all 64-bit processors were assumed to lack
9858hardware support for non-aligned transfers.
9859
9860Completed conversion of the Resource Manager to nearly full table-driven
9861operation. Specifically, the resource conversion code (convert AML to
9862internal format and the reverse) and the debug code to dump internal
9863resource descriptors are fully table-driven, reducing code and data size
9864and
9865improving maintainability.
9866
9867The OSL interfaces for Acquire and Release Lock now use a 64-bit flag
9868word
9869on 64-bit processors instead of a fixed 32-bit word. (With assistance
9870from
9871Alexey Starikovskiy)
9872
9873Implemented support within the resource conversion code for the Type-
9874Specific byte within the various ACPI 3.0 *WordSpace macros.
9875
9876Fixed some issues within the resource conversion code for the type-
9877specific
9878flags for both Memory and I/O address resource descriptors. For Memory,
9879implemented support for the MTP and TTP flags. For I/O, split the TRS and
9880TTP flags into two separate fields.
9881
9882Code and Data Size: The current and previous library sizes for the core
9883subsystem are shown below. These are the code and data sizes for the
9884acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
9885These
9886values do not include any ACPI driver or OSPM code. The debug version of
9887the
9888code includes the debug output trace mechanism and has a much larger code
9889and data size. Note that these values will vary depending on the
9890efficiency
9891of the compiler and the compiler options used during generation.
9892
9893  Previous Release:
9894    Non-Debug Version:  77.1K Code, 12.1K Data,  89.2K Total
9895    Debug Version:     168.0K Code, 68.3K Data, 236.3K Total
9896  Current Release:
9897    Non-Debug Version:  76.1K Code, 12.2K Data,  88.3K Total
9898    Debug Version:     163.5K Code, 67.0K Data, 230.5K Total
9899
9900
9901
99022) iASL Compiler/Disassembler:
9903
9904Relaxed a compiler restriction that disallowed a ResourceIndex byte if
9905the
9906corresponding ResourceSource string was not also present in a resource
9907descriptor declaration. This restriction caused problems with existing
9908AML/ASL code that includes the Index byte without the string. When such
9909AML
9910was disassembled, it could not be compiled without modification. Further,
9911the modified code created a resource template with a different size than
9912the
9913original, breaking code that used fixed offsets into the resource
9914template
9915buffer.
9916
9917Removed a recent feature of the disassembler to ignore a lone
9918ResourceIndex
9919byte. This byte is now emitted if present so that the exact AML can be
9920reproduced when the disassembled code is recompiled.
9921
9922Improved comments and text alignment for the resource descriptor code
9923emitted by the disassembler.
9924
9925Implemented disassembler support for the ACPI 3.0 AccessSize field within
9926a
9927Register() resource descriptor.
9928
9929----------------------------------------
993030 September 2005. Summary of changes for version 20050930:
9931
99321) ACPI CA Core Subsystem:
9933
9934Completed a major overhaul of the Resource Manager code - specifically,
9935optimizations in the area of the AML/internal resource conversion code.
9936The
9937code has been optimized to simplify and eliminate duplicated code, CPU
9938stack
9939use has been decreased by optimizing function parameters and local
9940variables, and naming conventions across the manager have been
9941standardized
9942for clarity and ease of maintenance (this includes function, parameter,
9943variable, and struct/typedef names.) The update may force changes in some
9944driver code, depending on how resources are handled by the host OS.
9945
9946All Resource Manager dispatch and information tables have been moved to a
9947single location for clarity and ease of maintenance. One new file was
9948created, named "rsinfo.c".
9949
9950The ACPI return macros (return_ACPI_STATUS, etc.) have been modified to
9951guarantee that the argument is not evaluated twice, making them less
9952prone
9953to macro side-effects. However, since there exists the possibility of
9954additional stack use if a particular compiler cannot optimize them (such
9955as
9956in the debug generation case), the original macros are optionally
9957available.
9958Note that some invocations of the return_VALUE macro may now cause size
9959mismatch warnings; the return_UINT8 and return_UINT32 macros are provided
9960to
9961eliminate these. (From Randy Dunlap)
9962
9963Implemented a new mechanism to enable debug tracing for individual
9964control
9965methods. A new external interface, AcpiDebugTrace, is provided to enable
9966this mechanism. The intent is to allow the host OS to easily enable and
9967disable tracing for problematic control methods. This interface can be
9968easily exposed to a user or debugger interface if desired. See the file
9969psxface.c for details.
9970
9971AcpiUtCallocate will now return a valid pointer if a length of zero is
9972specified - a length of one is used and a warning is issued. This matches
9973the behavior of AcpiUtAllocate.
9974
9975Code and Data Size: The current and previous library sizes for the core
9976subsystem are shown below. These are the code and data sizes for the
9977acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
9978These
9979values do not include any ACPI driver or OSPM code. The debug version of
9980the
9981code includes the debug output trace mechanism and has a much larger code
9982and data size. Note that these values will vary depending on the
9983efficiency
9984of the compiler and the compiler options used during generation.
9985
9986  Previous Release:
9987    Non-Debug Version:  77.5K Code, 12.0K Data,  89.5K Total
9988    Debug Version:     168.1K Code, 68.4K Data, 236.5K Total
9989  Current Release:
9990    Non-Debug Version:  77.1K Code, 12.1K Data,  89.2K Total
9991    Debug Version:     168.0K Code, 68.3K Data, 236.3K Total
9992
9993
99942) iASL Compiler/Disassembler:
9995
9996A remark is issued if the effective compile-time length of a package or
9997buffer is zero. Previously, this was a warning.
9998
9999----------------------------------------
1000016 September 2005. Summary of changes for version 20050916:
10001
100021) ACPI CA Core Subsystem:
10003
10004Fixed a problem within the Resource Manager where support for the Generic
10005Register descriptor was not fully implemented. This descriptor is now
10006fully
10007recognized, parsed, disassembled, and displayed.
10008
10009Completely restructured the Resource Manager code to utilize table-driven
10010dispatch and lookup, eliminating many of the large switch() statements.
10011This
10012reduces overall subsystem code size and code complexity. Affects the
10013resource parsing and construction, disassembly, and debug dump output.
10014
10015Cleaned up and restructured the debug dump output for all resource
10016descriptors. Improved readability of the output and reduced code size.
10017
10018Fixed a problem where changes to internal data structures caused the
10019optional ACPI_MUTEX_DEBUG code to fail compilation if specified.
10020
10021Code and Data Size: The current and previous library sizes for the core
10022subsystem are shown below. These are the code and data sizes for the
10023acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
10024These
10025values do not include any ACPI driver or OSPM code. The debug version of
10026the
10027code includes the debug output trace mechanism and has a much larger code
10028and data size. Note that these values will vary depending on the
10029efficiency
10030of the compiler and the compiler options used during generation.
10031
10032  Previous Release:
10033    Non-Debug Version:  78.4K Code, 11.8K Data,  90.2K Total
10034    Debug Version:     169.6K Code, 69.9K Data, 239.5K Total
10035  Current Release:
10036    Non-Debug Version:  77.5K Code, 12.0K Data,  89.5K Total
10037    Debug Version:     168.1K Code, 68.4K Data, 236.5K Total
10038
10039
100402) iASL Compiler/Disassembler:
10041
10042Updated the disassembler to automatically insert an EndDependentFn()
10043macro
10044into the ASL stream if this macro is missing in the original AML code,
10045simplifying compilation of the resulting ASL module.
10046
10047Fixed a problem in the disassembler where a disassembled ResourceSource
10048string (within a large resource descriptor) was not surrounded by quotes
10049and
10050not followed by a comma, causing errors when the resulting ASL module was
10051compiled. Also, escape sequences within a ResourceSource string are now
10052handled correctly (especially "\\")
10053
10054----------------------------------------
1005502 September 2005. Summary of changes for version 20050902:
10056
100571) ACPI CA Core Subsystem:
10058
10059Fixed a problem with the internal Owner ID allocation and deallocation
10060mechanisms for control method execution and recursive method invocation.
10061This should eliminate the OWNER_ID_LIMIT exceptions and "Invalid OwnerId"
10062messages seen on some systems. Recursive method invocation depth is
10063currently limited to 255. (Alexey Starikovskiy)
10064
10065Completely eliminated all vestiges of support for the "module-level
10066executable code" until this support is fully implemented and debugged.
10067This
10068should eliminate the NO_RETURN_VALUE exceptions seen during table load on
10069some systems that invoke this support.
10070
10071Fixed a problem within the resource manager code where the transaction
10072flags
10073for a 64-bit address descriptor were handled incorrectly in the type-
10074specific flag byte.
10075
10076Consolidated duplicate code within the address descriptor resource
10077manager
10078code, reducing overall subsystem code size.
10079
10080Fixed a fault when using the AML debugger "disassemble" command to
10081disassemble individual control methods.
10082
10083Removed references to the "release_current" directory within the Unix
10084release package.
10085
10086Code and Data Size: The current and previous core subsystem library sizes
10087are shown below. These are the code and data sizes for the acpica.lib
10088produced by the Microsoft Visual C++ 6.0 compiler. These values do not
10089include any ACPI driver or OSPM code. The debug version of the code
10090includes
10091the debug output trace mechanism and has a much larger code and data
10092size.
10093Note that these values will vary depending on the efficiency of the
10094compiler
10095and the compiler options used during generation.
10096
10097  Previous Release:
10098    Non-Debug Version:  78.6K Code, 11.7K Data,  90.3K Total
10099    Debug Version:     170.0K Code, 69.9K Data, 239.9K Total
10100  Current Release:
10101    Non-Debug Version:  78.4K Code, 11.8K Data,  90.2K Total
10102    Debug Version:     169.6K Code, 69.9K Data, 239.5K Total
10103
10104
101052) iASL Compiler/Disassembler:
10106
10107Implemented an error check for illegal duplicate values in the interrupt
10108and
10109dma lists for the following ASL macros: Dma(), Irq(), IrqNoFlags(), and
10110Interrupt().
10111
10112Implemented error checking for the Irq() and IrqNoFlags() macros to
10113detect
10114too many values in the interrupt list (16 max) and invalid values in the
10115list (range 0 - 15)
10116
10117The maximum length string literal within an ASL file is now restricted to
10118200 characters as per the ACPI specification.
10119
10120Fixed a fault when using the -ln option (generate namespace listing).
10121
10122Implemented an error check to determine if a DescriptorName within a
10123resource descriptor has already been used within the current scope.
10124
10125----------------------------------------
1012615 August 2005.  Summary of changes for version 20050815:
10127
101281) ACPI CA Core Subsystem:
10129
10130Implemented a full bytewise compare to determine if a table load request
10131is
10132attempting to load a duplicate table. The compare is performed if the
10133table
10134signatures and table lengths match. This will allow different tables with
10135the same OEM Table ID and revision to be loaded - probably against the
10136ACPI
10137specification, but discovered in the field nonetheless.
10138
10139Added the changes.txt logfile to each of the zipped release packages.
10140
10141Code and Data Size: Current and previous core subsystem library sizes are
10142shown below. These are the code and data sizes for the acpica.lib
10143produced
10144by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10145any ACPI driver or OSPM code. The debug version of the code includes the
10146debug output trace mechanism and has a much larger code and data size.
10147Note
10148that these values will vary depending on the efficiency of the compiler
10149and
10150the compiler options used during generation.
10151
10152  Previous Release:
10153    Non-Debug Version:  78.6K Code, 11.7K Data,  90.3K Total
10154    Debug Version:     167.0K Code, 69.9K Data, 236.9K Total
10155  Current Release:
10156    Non-Debug Version:  78.6K Code, 11.7K Data,  90.3K Total
10157    Debug Version:     170.0K Code, 69.9K Data, 239.9K Total
10158
10159
101602) iASL Compiler/Disassembler:
10161
10162Fixed a problem where incorrect AML code could be generated for Package
10163objects if optimization is disabled (via the -oa switch).
10164
10165Fixed a problem with where incorrect AML code is generated for variable-
10166length packages when the package length is not specified and the number
10167of
10168initializer values is greater than 255.
10169
10170
10171----------------------------------------
1017229 July 2005.  Summary of changes for version 20050729:
10173
101741) ACPI CA Core Subsystem:
10175
10176Implemented support to ignore an attempt to install/load a particular
10177ACPI
10178table more than once. Apparently there exists BIOS code that repeatedly
10179attempts to load the same SSDT upon certain events. With assistance from
10180Venkatesh Pallipadi.
10181
10182Restructured the main interface to the AML parser in order to correctly
10183handle all exceptional conditions. This will prevent leakage of the
10184OwnerId
10185resource and should eliminate the AE_OWNER_ID_LIMIT exceptions seen on
10186some
10187machines. With assistance from Alexey Starikovskiy.
10188
10189Support for "module level code" has been disabled in this version due to
10190a
10191number of issues that have appeared on various machines. The support can
10192be
10193enabled by defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem
10194compilation. When the issues are fully resolved, the code will be enabled
10195by
10196default again.
10197
10198Modified the internal functions for debug print support to define the
10199FunctionName parameter as a (const char *) for compatibility with
10200compiler
10201built-in macros such as __FUNCTION__, etc.
10202
10203Linted the entire ACPICA source tree for both 32-bit and 64-bit.
10204
10205Implemented support to display an object count summary for the AML
10206Debugger
10207commands Object and Methods.
10208
10209Code and Data Size: Current and previous core subsystem library sizes are
10210shown below. These are the code and data sizes for the acpica.lib
10211produced
10212by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10213any ACPI driver or OSPM code. The debug version of the code includes the
10214debug output trace mechanism and has a much larger code and data size.
10215Note
10216that these values will vary depending on the efficiency of the compiler
10217and
10218the compiler options used during generation.
10219
10220  Previous Release:
10221    Non-Debug Version:  78.6K Code, 11.6K Data,  90.2K Total
10222    Debug Version:     170.0K Code, 69.7K Data, 239.7K Total
10223  Current Release:
10224    Non-Debug Version:  78.6K Code, 11.7K Data,  90.3K Total
10225    Debug Version:     167.0K Code, 69.9K Data, 236.9K Total
10226
10227
102282) iASL Compiler/Disassembler:
10229
10230Fixed a regression that appeared in the 20050708 version of the compiler
10231where an error message was inadvertently emitted for invocations of the
10232_OSI
10233reserved control method.
10234
10235----------------------------------------
1023608 July 2005.  Summary of changes for version 20050708:
10237
102381) ACPI CA Core Subsystem:
10239
10240The use of the CPU stack in the debug version of the subsystem has been
10241considerably reduced. Previously, a debug structure was declared in every
10242function that used the debug macros. This structure has been removed in
10243favor of declaring the individual elements as parameters to the debug
10244functions. This reduces the cumulative stack use during nested execution
10245of
10246ACPI function calls at the cost of a small increase in the code size of
10247the
10248debug version of the subsystem. With assistance from Alexey Starikovskiy
10249and
10250Len Brown.
10251
10252Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent
10253headers to define a macro that will return the current function name at
10254runtime (such as __FUNCTION__ or _func_, etc.) The function name is used
10255by
10256the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the
10257compiler-dependent header, the function name is saved on the CPU stack
10258(one
10259pointer per function.) This mechanism is used because apparently there
10260exists no standard ANSI-C defined macro that that returns the function
10261name.
10262
10263Redesigned and reimplemented the "Owner ID" mechanism used to track
10264namespace objects created/deleted by ACPI tables and control method
10265execution. A bitmap is now used to allocate and free the IDs, thus
10266solving
10267the wraparound problem present in the previous implementation. The size
10268of
10269the namespace node descriptor was reduced by 2 bytes as a result (Alexey
10270Starikovskiy).
10271
10272Removed the UINT32_BIT and UINT16_BIT types that were used for the
10273bitfield
10274flag definitions within the headers for the predefined ACPI tables. These
10275have been replaced by UINT8_BIT in order to increase the code portability
10276of
10277the subsystem. If the use of UINT8 remains a problem, we may be forced to
10278eliminate bitfields entirely because of a lack of portability.
10279
10280Enhanced the performance of the AcpiUtUpdateObjectReference procedure.
10281This
10282is a frequently used function and this improvement increases the
10283performance
10284of the entire subsystem (Alexey Starikovskiy).
10285
10286Fixed several possible memory leaks and the inverse - premature object
10287deletion (Alexey Starikovskiy).
10288
10289Code and Data Size: Current and previous core subsystem library sizes are
10290shown below. These are the code and data sizes for the acpica.lib
10291produced
10292by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10293any ACPI driver or OSPM code. The debug version of the code includes the
10294debug output trace mechanism and has a much larger code and data size.
10295Note
10296that these values will vary depending on the efficiency of the compiler
10297and
10298the compiler options used during generation.
10299
10300  Previous Release:
10301    Non-Debug Version:  78.6K Code, 11.5K Data,  90.1K Total
10302    Debug Version:     165.2K Code, 69.6K Data, 234.8K Total
10303  Current Release:
10304    Non-Debug Version:  78.6K Code, 11.6K Data,  90.2K Total
10305    Debug Version:     170.0K Code, 69.7K Data, 239.7K Total
10306
10307----------------------------------------
1030824 June 2005.  Summary of changes for version 20050624:
10309
103101) ACPI CA Core Subsystem:
10311
10312Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for
10313the host-defined cache object. This allows the OSL implementation to
10314define
10315and type this object in any manner desired, simplifying the OSL
10316implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for
10317Linux, and should be defined in the OS-specific header file for other
10318operating systems as required.
10319
10320Changed the interface to AcpiOsAcquireObject to directly return the
10321requested object as the function return (instead of ACPI_STATUS.) This
10322change was made for performance reasons, since this is the purpose of the
10323interface in the first place. AcpiOsAcquireObject is now similar to the
10324AcpiOsAllocate interface.
10325
10326Implemented a new AML debugger command named Businfo. This command
10327displays
10328information about all devices that have an associate _PRT object. The
10329_ADR,
10330_HID, _UID, and _CID are displayed for these devices.
10331
10332Modified the initialization sequence in AcpiInitializeSubsystem to call
10333the
10334OSL interface AcpiOslInitialize first, before any local initialization.
10335This
10336change was required because the global initialization now calls OSL
10337interfaces.
10338
10339Enhanced the Dump command to display the entire contents of Package
10340objects
10341(including all sub-objects and their values.)
10342
10343Restructured the code base to split some files because of size and/or
10344because the code logically belonged in a separate file. New files are
10345listed
10346below. All makefiles and project files included in the ACPI CA release
10347have
10348been updated.
10349    utilities/utcache.c           /* Local cache interfaces */
10350    utilities/utmutex.c           /* Local mutex support */
10351    utilities/utstate.c           /* State object support */
10352    interpreter/parser/psloop.c   /* Main AML parse loop */
10353
10354Code and Data Size: Current and previous core subsystem library sizes are
10355shown below. These are the code and data sizes for the acpica.lib
10356produced
10357by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10358any ACPI driver or OSPM code. The debug version of the code includes the
10359debug output trace mechanism and has a much larger code and data size.
10360Note
10361that these values will vary depending on the efficiency of the compiler
10362and
10363the compiler options used during generation.
10364
10365  Previous Release:
10366    Non-Debug Version:  78.3K Code, 11.6K Data,  89.9K Total
10367    Debug Version:     164.0K Code, 69.1K Data, 233.1K Total
10368  Current Release:
10369    Non-Debug Version:  78.6K Code, 11.5K Data,  90.1K Total
10370    Debug Version:     165.2K Code, 69.6K Data, 234.8K Total
10371
10372
103732) iASL Compiler/Disassembler:
10374
10375Fixed a regression introduced in version 20050513 where the use of a
10376Package
10377object within a Case() statement caused a compile time exception. The
10378original behavior has been restored (a Match() operator is emitted.)
10379
10380----------------------------------------
1038117 June 2005.  Summary of changes for version 20050617:
10382
103831) ACPI CA Core Subsystem:
10384
10385Moved the object cache operations into the OS interface layer (OSL) to
10386allow
10387the host OS to handle these operations if desired (for example, the Linux
10388OSL will invoke the slab allocator). This support is optional; the
10389compile
10390time define ACPI_USE_LOCAL_CACHE may be used to utilize the original
10391cache
10392code in the ACPI CA core. The new OSL interfaces are shown below. See
10393utalloc.c for an example implementation, and acpiosxf.h for the exact
10394interface definitions. With assistance from Alexey Starikovskiy.
10395    AcpiOsCreateCache
10396    AcpiOsDeleteCache
10397    AcpiOsPurgeCache
10398    AcpiOsAcquireObject
10399    AcpiOsReleaseObject
10400
10401Modified the interfaces to AcpiOsAcquireLock and AcpiOsReleaseLock to
10402return
10403and restore a flags parameter. This fits better with many OS lock models.
10404Note: the current execution state (interrupt handler or not) is no longer
10405passed to these interfaces. If necessary, the OSL must determine this
10406state
10407by itself, a simple and fast operation. With assistance from Alexey
10408Starikovskiy.
10409
10410Fixed a problem in the ACPI table handling where a valid XSDT was assumed
10411present if the revision of the RSDP was 2 or greater. According to the
10412ACPI
10413specification, the XSDT is optional in all cases, and the table manager
10414therefore now checks for both an RSDP >=2 and a valid XSDT pointer.
10415Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs
10416contain
10417only the RSDT.
10418
10419Fixed an interpreter problem with the Mid() operator in the case of an
10420input
10421string where the resulting output string is of zero length. It now
10422correctly
10423returns a valid, null terminated string object instead of a string object
10424with a null pointer.
10425
10426Fixed a problem with the control method argument handling to allow a
10427store
10428to an Arg object that already contains an object of type Device. The
10429Device
10430object is now correctly overwritten. Previously, an error was returned.
10431
10432
10433Enhanced the debugger Find command to emit object values in addition to
10434the
10435found object pathnames. The output format is the same as the dump
10436namespace
10437command.
10438
10439Enhanced the debugger Set command. It now has the ability to set the
10440value
10441of any Named integer object in the namespace (Previously, only method
10442locals
10443and args could be set.)
10444
10445Code and Data Size: Current and previous core subsystem library sizes are
10446shown below. These are the code and data sizes for the acpica.lib
10447produced
10448by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10449any ACPI driver or OSPM code. The debug version of the code includes the
10450debug output trace mechanism and has a much larger code and data size.
10451Note
10452that these values will vary depending on the efficiency of the compiler
10453and
10454the compiler options used during generation.
10455
10456  Previous Release:
10457    Non-Debug Version:  78.1K Code, 11.6K Data,  89.7K Total
10458    Debug Version:     164.0K Code, 69.3K Data, 233.3K Total
10459  Current Release:
10460    Non-Debug Version:  78.3K Code, 11.6K Data,  89.9K Total
10461    Debug Version:     164.0K Code, 69.1K Data, 233.1K Total
10462
10463
104642) iASL Compiler/Disassembler:
10465
10466Fixed a regression in the disassembler where if/else/while constructs
10467were
10468output incorrectly. This problem was introduced in the previous release
10469(20050526). This problem also affected the single-step disassembly in the
10470debugger.
10471
10472Fixed a problem where compiling the reserved _OSI method would randomly
10473(but
10474rarely) produce compile errors.
10475
10476Enhanced the disassembler to emit compilable code in the face of
10477incorrect
10478AML resource descriptors. If the optional ResourceSourceIndex is present,
10479but the ResourceSource is not, do not emit the ResourceSourceIndex in the
10480disassembly. Otherwise, the resulting code cannot be compiled without
10481errors.
10482
10483----------------------------------------
1048426 May 2005.  Summary of changes for version 20050526:
10485
104861) ACPI CA Core Subsystem:
10487
10488Implemented support to execute Type 1 and Type 2 AML opcodes appearing at
10489the module level (not within a control method.) These opcodes are
10490executed
10491exactly once at the time the table is loaded. This type of code was legal
10492up
10493until the release of ACPI 2.0B (2002) and is now supported within ACPI CA
10494in
10495order to provide backwards compatibility with earlier BIOS
10496implementations.
10497This eliminates the "Encountered executable code at module level" warning
10498that was previously generated upon detection of such code.
10499
10500Fixed a problem in the interpreter where an AE_NOT_FOUND exception could
10501inadvertently be generated during the lookup of namespace objects in the
10502second pass parse of ACPI tables and control methods. It appears that
10503this
10504problem could occur during the resolution of forward references to
10505namespace
10506objects.
10507
10508Added the ACPI_MUTEX_DEBUG #ifdef to the AcpiUtReleaseMutex function,
10509corresponding to the same #ifdef in the AcpiUtAcquireMutex function. This
10510allows the deadlock detection debug code to be compiled out in the normal
10511case, improving mutex performance (and overall subsystem performance)
10512considerably.
10513
10514Implemented a handful of miscellaneous fixes for possible memory leaks on
10515error conditions and error handling control paths. These fixes were
10516suggested by FreeBSD and the Coverity Prevent source code analysis tool.
10517
10518Added a check for a null RSDT pointer in AcpiGetFirmwareTable
10519(tbxfroot.c)
10520to prevent a fault in this error case.
10521
10522Code and Data Size: Current and previous core subsystem library sizes are
10523shown below. These are the code and data sizes for the acpica.lib
10524produced
10525by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10526any ACPI driver or OSPM code. The debug version of the code includes the
10527debug output trace mechanism and has a much larger code and data size.
10528Note
10529that these values will vary depending on the efficiency of the compiler
10530and
10531the compiler options used during generation.
10532
10533  Previous Release:
10534    Non-Debug Version:  78.2K Code, 11.6K Data,  89.8K Total
10535    Debug Version:     163.7K Code, 69.3K Data, 233.0K Total
10536  Current Release:
10537    Non-Debug Version:  78.1K Code, 11.6K Data,  89.7K Total
10538    Debug Version:     164.0K Code, 69.3K Data, 233.3K Total
10539
10540
105412) iASL Compiler/Disassembler:
10542
10543Implemented support to allow Type 1 and Type 2 ASL operators to appear at
10544the module level (not within a control method.) These operators will be
10545executed once at the time the table is loaded. This type of code was
10546legal
10547up until the release of ACPI 2.0B (2002) and is now supported by the iASL
10548compiler in order to provide backwards compatibility with earlier BIOS
10549ASL
10550code.
10551
10552The ACPI integer width (specified via the table revision ID or the -r
10553override, 32 or 64 bits) is now used internally during compile-time
10554constant
10555folding to ensure that constants are truncated to 32 bits if necessary.
10556Previously, the revision ID value was only emitted in the AML table
10557header.
10558
10559An error message is now generated for the Mutex and Method operators if
10560the
10561SyncLevel parameter is outside the legal range of 0 through 15.
10562
10563Fixed a problem with the Method operator ParameterTypes list handling
10564(ACPI
105653.0). Previously, more than 2 types or 2 arguments generated a syntax
10566error.
10567The actual underlying implementation of method argument typechecking is
10568still under development, however.
10569
10570----------------------------------------
1057113 May 2005.  Summary of changes for version 20050513:
10572
105731) ACPI CA Core Subsystem:
10574
10575Implemented support for PCI Express root bridges -- added support for
10576device
10577PNP0A08 in the root bridge search within AcpiEvPciConfigRegionSetup.
10578
10579The interpreter now automatically truncates incoming 64-bit constants to
1058032
10581bits if currently executing out of a 32-bit ACPI table (Revision < 2).
10582This
10583also affects the iASL compiler constant folding. (Note: as per below, the
10584iASL compiler no longer allows 64-bit constants within 32-bit tables.)
10585
10586Fixed a problem where string and buffer objects with "static" pointers
10587(pointers to initialization data within an ACPI table) were not handled
10588consistently. The internal object copy operation now always copies the
10589data
10590to a newly allocated buffer, regardless of whether the source object is
10591static or not.
10592
10593Fixed a problem with the FromBCD operator where an implicit result
10594conversion was improperly performed while storing the result to the
10595target
10596operand. Since this is an "explicit conversion" operator, the implicit
10597conversion should never be performed on the output.
10598
10599Fixed a problem with the CopyObject operator where a copy to an existing
10600named object did not always completely overwrite the existing object
10601stored
10602at name. Specifically, a buffer-to-buffer copy did not delete the
10603existing
10604buffer.
10605
10606Replaced "InterruptLevel" with "InterruptNumber" in all GPE interfaces
10607and
10608structs for consistency.
10609
10610Code and Data Size: Current and previous core subsystem library sizes are
10611shown below. These are the code and data sizes for the acpica.lib
10612produced
10613by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10614any ACPI driver or OSPM code. The debug version of the code includes the
10615debug output trace mechanism and has a much larger code and data size.
10616Note
10617that these values will vary depending on the efficiency of the compiler
10618and
10619the compiler options used during generation.
10620
10621  Previous Release:
10622    Non-Debug Version:  78.2K Code, 11.6K Data,  89.8K Total
10623    Debug Version:     163.7K Code, 69.3K Data, 233.0K Total
10624  Current Release: (Same sizes)
10625    Non-Debug Version:  78.2K Code, 11.6K Data,  89.8K Total
10626    Debug Version:     163.7K Code, 69.3K Data, 233.0K Total
10627
10628
106292) iASL Compiler/Disassembler:
10630
10631The compiler now emits a warning if an attempt is made to generate a 64-
10632bit
10633integer constant from within a 32-bit ACPI table (Revision < 2). The
10634integer
10635is truncated to 32 bits.
10636
10637Fixed a problem with large package objects: if the static length of the
10638package is greater than 255, the "variable length package" opcode is
10639emitted. Previously, this caused an error. This requires an update to the
10640ACPI spec, since it currently (incorrectly) states that packages larger
10641than
10642255 elements are not allowed.
10643
10644The disassembler now correctly handles variable length packages and
10645packages
10646larger than 255 elements.
10647
10648----------------------------------------
1064908 April 2005.  Summary of changes for version 20050408:
10650
106511) ACPI CA Core Subsystem:
10652
10653Fixed three cases in the interpreter where an "index" argument to an ASL
10654function was still (internally) 32 bits instead of the required 64 bits.
10655This was the Index argument to the Index, Mid, and Match operators.
10656
10657The "strupr" function is now permanently local (AcpiUtStrupr), since this
10658is
10659not a POSIX-defined function and not present in most kernel-level C
10660libraries. All references to the C library strupr function have been
10661removed
10662from the headers.
10663
10664Completed the deployment of static functions/prototypes. All prototypes
10665with
10666the static attribute have been moved from the headers to the owning C
10667file.
10668
10669Implemented an extract option (-e) for the AcpiBin utility (AML binary
10670utility). This option allows the utility to extract individual ACPI
10671tables
10672from the output of AcpiDmp. It provides the same functionality of the
10673acpixtract.pl perl script without the worry of setting the correct perl
10674options. AcpiBin runs on Windows and has not yet been generated/validated
10675in
10676the Linux/Unix environment (but should be soon).
10677
10678Updated and fixed the table dump option for AcpiBin (-d). This option
10679converts a single ACPI table to a hex/ascii file, similar to the output
10680of
10681AcpiDmp.
10682
10683Code and Data Size: Current and previous core subsystem library sizes are
10684shown below. These are the code and data sizes for the acpica.lib
10685produced
10686by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10687any ACPI driver or OSPM code. The debug version of the code includes the
10688debug output trace mechanism and has a much larger code and data size.
10689Note
10690that these values will vary depending on the efficiency of the compiler
10691and
10692the compiler options used during generation.
10693
10694  Previous Release:
10695    Non-Debug Version:  78.0K Code, 11.6K Data,  89.6K Total
10696    Debug Version:     163.5K Code, 69.3K Data, 232.8K Total
10697  Current Release:
10698    Non-Debug Version:  78.2K Code, 11.6K Data,  89.8K Total
10699    Debug Version:     163.7K Code, 69.3K Data, 233.0K Total
10700
10701
107022) iASL Compiler/Disassembler:
10703
10704Disassembler fix: Added a check to ensure that the table length found in
10705the
10706ACPI table header within the input file is not longer than the actual
10707input
10708file size. This indicates some kind of file or table corruption.
10709
10710----------------------------------------
1071129 March 2005.  Summary of changes for version 20050329:
10712
107131) ACPI CA Core Subsystem:
10714
10715An error is now generated if an attempt is made to create a Buffer Field
10716of
10717length zero (A CreateField with a length operand of zero.)
10718
10719The interpreter now issues a warning whenever executable code at the
10720module
10721level is detected during ACPI table load. This will give some idea of the
10722prevalence of this type of code.
10723
10724Implemented support for references to named objects (other than control
10725methods) within package objects.
10726
10727Enhanced package object output for the debug object. Package objects are
10728now
10729completely dumped, showing all elements.
10730
10731Enhanced miscellaneous object output for the debug object. Any object can
10732now be written to the debug object (for example, a device object can be
10733written, and the type of the object will be displayed.)
10734
10735The "static" qualifier has been added to all local functions across both
10736the
10737core subsystem and the iASL compiler.
10738
10739The number of "long" lines (> 80 chars) within the source has been
10740significantly reduced, by about 1/3.
10741
10742Cleaned up all header files to ensure that all CA/iASL functions are
10743prototyped (even static functions) and the formatting is consistent.
10744
10745Two new header files have been added, acopcode.h and acnames.h.
10746
10747Removed several obsolete functions that were no longer used.
10748
10749Code and Data Size: Current and previous core subsystem library sizes are
10750shown below. These are the code and data sizes for the acpica.lib
10751produced
10752by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10753any ACPI driver or OSPM code. The debug version of the code includes the
10754debug output trace mechanism and has a much larger code and data size.
10755Note
10756that these values will vary depending on the efficiency of the compiler
10757and
10758the compiler options used during generation.
10759
10760  Previous Release:
10761    Non-Debug Version:  78.3K Code, 11.5K Data,  89.8K Total
10762    Debug Version:     165.4K Code, 69.7K Data, 236.1K Total
10763  Current Release:
10764    Non-Debug Version:  78.0K Code, 11.6K Data,  89.6K Total
10765    Debug Version:     163.5K Code, 69.3K Data, 232.8K Total
10766
10767
10768
107692) iASL Compiler/Disassembler:
10770
10771Fixed a problem with the resource descriptor generation/support. For the
10772ResourceSourceIndex and the ResourceSource fields, both must be present,
10773or
10774both must be not present - can't have one without the other.
10775
10776The compiler now returns non-zero from the main procedure if any errors
10777have
10778occurred during the compilation.
10779
10780
10781----------------------------------------
1078209 March 2005.  Summary of changes for version 20050309:
10783
107841) ACPI CA Core Subsystem:
10785
10786The string-to-buffer implicit conversion code has been modified again
10787after
10788a change to the ACPI specification.  In order to match the behavior of
10789the
10790other major ACPI implementation, the target buffer is no longer truncated
10791if
10792the source string is smaller than an existing target buffer. This change
10793requires an update to the ACPI spec, and should eliminate the recent
10794AE_AML_BUFFER_LIMIT issues.
10795
10796The "implicit return" support was rewritten to a new algorithm that
10797solves
10798the general case. Rather than attempt to determine when a method is about
10799to
10800exit, the result of every ASL operator is saved momentarily until the
10801very
10802next ASL operator is executed. Therefore, no matter how the method exits,
10803there will always be a saved implicit return value. This feature is only
10804enabled with the AcpiGbl_EnableInterpreterSlack flag, and should
10805eliminate
10806AE_AML_NO_RETURN_VALUE errors when enabled.
10807
10808Implemented implicit conversion support for the predicate (operand) of
10809the
10810If, Else, and While operators. String and Buffer arguments are
10811automatically
10812converted to Integers.
10813
10814Changed the string-to-integer conversion behavior to match the new ACPI
10815errata: "If no integer object exists, a new integer is created. The ASCII
10816string is interpreted as a hexadecimal constant. Each string character is
10817interpreted as a hexadecimal value ('0'-'9', 'A'-'F', 'a', 'f'), starting
10818with the first character as the most significant digit, and ending with
10819the
10820first non-hexadecimal character or end-of-string." This means that the
10821first
10822non-hex character terminates the conversion and this is the code that was
10823changed.
10824
10825Fixed a problem where the ObjectType operator would fail (fault) when
10826used
10827on an Index of a Package which pointed to a null package element. The
10828operator now properly returns zero (Uninitialized) in this case.
10829
10830Fixed a problem where the While operator used excessive memory by not
10831properly popping the result stack during execution. There was no memory
10832leak
10833after execution, however. (Code provided by Valery Podrezov.)
10834
10835Fixed a problem where references to control methods within Package
10836objects
10837caused the method to be invoked, instead of producing a reference object
10838pointing to the method.
10839
10840Restructured and simplified the pswalk.c module (AcpiPsDeleteParseTree)
10841to
10842improve performance and reduce code size. (Code provided by Alexey
10843Starikovskiy.)
10844
10845Code and Data Size: Current and previous core subsystem library sizes are
10846shown below. These are the code and data sizes for the acpica.lib
10847produced
10848by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10849any ACPI driver or OSPM code. The debug version of the code includes the
10850debug output trace mechanism and has a much larger code and data size.
10851Note
10852that these values will vary depending on the efficiency of the compiler
10853and
10854the compiler options used during generation.
10855
10856  Previous Release:
10857    Non-Debug Version:  78.3K Code, 11.5K Data,  89.8K Total
10858    Debug Version:     165.4K Code, 69.6K Data, 236.0K Total
10859  Current Release:
10860    Non-Debug Version:  78.3K Code, 11.5K Data,  89.8K Total
10861    Debug Version:     165.4K Code, 69.7K Data, 236.1K Total
10862
10863
108642) iASL Compiler/Disassembler:
10865
10866Fixed a problem with the Return operator with no arguments. Since the AML
10867grammar for the byte encoding requires an operand for the Return opcode,
10868the
10869compiler now emits a Return(Zero) for this case.  An ACPI specification
10870update has been written for this case.
10871
10872For tables other than the DSDT, namepath optimization is automatically
10873disabled. This is because SSDTs can be loaded anywhere in the namespace,
10874the
10875compiler has no knowledge of where, and thus cannot optimize namepaths.
10876
10877Added "ProcessorObj" to the ObjectTypeKeyword list. This object type was
10878inadvertently omitted from the ACPI specification, and will require an
10879update to the spec.
10880
10881The source file scan for ASCII characters is now optional (-a). This
10882change
10883was made because some vendors place non-ascii characters within comments.
10884However, the scan is simply a brute-force byte compare to ensure all
10885characters in the file are in the range 0x00 to 0x7F.
10886
10887Fixed a problem with the CondRefOf operator where the compiler was
10888inappropriately checking for the existence of the target. Since the point
10889of
10890the operator is to check for the existence of the target at run-time, the
10891compiler no longer checks for the target existence.
10892
10893Fixed a problem where errors generated from the internal AML interpreter
10894during constant folding were not handled properly, causing a fault.
10895
10896Fixed a problem with overly aggressive range checking for the Stall
10897operator. The valid range (max 255) is now only checked if the operand is
10898of
10899type Integer. All other operand types cannot be statically checked.
10900
10901Fixed a problem where control method references within the RefOf,
10902DeRefOf,
10903and ObjectType operators were not treated properly. They are now treated
10904as
10905actual references, not method invocations.
10906
10907Fixed and enhanced the "list namespace" option (-ln). This option was
10908broken
10909a number of releases ago.
10910
10911Improved error handling for the Field, IndexField, and BankField
10912operators.
10913The compiler now cleanly reports and recovers from errors in the field
10914component (FieldUnit) list.
10915
10916Fixed a disassembler problem where the optional ResourceDescriptor fields
10917TRS and TTP were not always handled correctly.
10918
10919Disassembler - Comments in output now use "//" instead of "/*"
10920
10921----------------------------------------
1092228 February 2005.  Summary of changes for version 20050228:
10923
109241) ACPI CA Core Subsystem:
10925
10926Fixed a problem where the result of an Index() operator (an object
10927reference) must increment the reference count on the target object for
10928the
10929life of the object reference.
10930
10931Implemented AML Interpreter and Debugger support for the new ACPI 3.0
10932Extended Address (IO, Memory, Space), QwordSpace, DwordSpace, and
10933WordSpace
10934resource descriptors.
10935
10936Implemented support in the _OSI method for the ACPI 3.0 "Extended Address
10937Space Descriptor" string, indicating interpreter support for the
10938descriptors
10939above.
10940
10941Implemented header support for the new ACPI 3.0 FADT flag bits.
10942
10943Implemented header support for the new ACPI 3.0 PCI Express bits for the
10944PM1
10945status/enable registers.
10946
10947Updated header support for the MADT processor local Apic struct and MADT
10948platform interrupt source struct for new ACPI 3.0 fields.
10949
10950Implemented header support for the SRAT and SLIT ACPI tables.
10951
10952Implemented the -s switch in AcpiExec to enable the "InterpreterSlack"
10953flag
10954at runtime.
10955
10956Code and Data Size: Current and previous core subsystem library sizes are
10957shown below. These are the code and data sizes for the acpica.lib
10958produced
10959by the Microsoft Visual C++ 6.0 compiler, and these values do not include
10960any ACPI driver or OSPM code. The debug version of the code includes the
10961debug output trace mechanism and has a much larger code and data size.
10962Note
10963that these values will vary depending on the efficiency of the compiler
10964and
10965the compiler options used during generation.
10966
10967  Previous Release:
10968    Non-Debug Version:  78.2K Code, 11.5K Data,  89.7K Total
10969    Debug Version:     164.9K Code, 69.2K Data, 234.1K Total
10970  Current Release:
10971    Non-Debug Version:  78.3K Code, 11.5K Data,  89.8K Total
10972    Debug Version:     165.4K Code, 69.6K Data, 236.0K Total
10973
10974
109752) iASL Compiler/Disassembler:
10976
10977Fixed a problem with the internal 64-bit String-to-integer conversion
10978with
10979strings less than two characters long.
10980
10981Fixed a problem with constant folding where the result of the Index()
10982operator can not be considered a constant. This means that Index() cannot
10983be
10984a type3 opcode and this will require an update to the ACPI specification.
10985
10986Disassembler: Implemented support for the TTP, MTP, and TRS resource
10987descriptor fields. These fields were inadvertently ignored and not output
10988in
10989the disassembly of the resource descriptor.
10990
10991
10992 ----------------------------------------
1099311 February 2005.  Summary of changes for version 20050211:
10994
109951) ACPI CA Core Subsystem:
10996
10997Implemented ACPI 3.0 support for implicit conversion within the Match()
10998operator. MatchObjects can now be of type integer, buffer, or string
10999instead
11000of just type integer.  Package elements are implicitly converted to the
11001type
11002of the MatchObject. This change aligns the behavior of Match() with the
11003behavior of the other logical operators (LLess(), etc.) It also requires
11004an
11005errata change to the ACPI specification as this support was intended for
11006ACPI 3.0, but was inadvertently omitted.
11007
11008Fixed a problem with the internal implicit "to buffer" conversion.
11009Strings
11010that are converted to buffers will cause buffer truncation if the string
11011is
11012smaller than the target buffer. Integers that are converted to buffers
11013will
11014not cause buffer truncation, only zero extension (both as per the ACPI
11015spec.) The problem was introduced when code was added to truncate the
11016buffer, but this should not be performed in all cases, only the string
11017case.
11018
11019Fixed a problem with the Buffer and Package operators where the
11020interpreter
11021would get confused if two such operators were used as operands to an ASL
11022operator (such as LLess(Buffer(1){0},Buffer(1){1}). The internal result
11023stack was not being popped after the execution of these operators,
11024resulting
11025in an AE_NO_RETURN_VALUE exception.
11026
11027Fixed a problem with constructs of the form Store(Index(...),...). The
11028reference object returned from Index was inadvertently resolved to an
11029actual
11030value. This problem was introduced in version 20050114 when the behavior
11031of
11032Store() was modified to restrict the object types that can be used as the
11033source operand (to match the ACPI specification.)
11034
11035Reduced excessive stack use within the AcpiGetObjectInfo procedure.
11036
11037Added a fix to aclinux.h to allow generation of AcpiExec on Linux.
11038
11039Updated the AcpiSrc utility to add the FADT_DESCRIPTOR_REV2_MINUS struct.
11040
11041Code and Data Size: Current and previous core subsystem library sizes are
11042shown below. These are the code and data sizes for the acpica.lib
11043produced
11044by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11045any ACPI driver or OSPM code. The debug version of the code includes the
11046debug output trace mechanism and has a much larger code and data size.
11047Note
11048that these values will vary depending on the efficiency of the compiler
11049and
11050the compiler options used during generation.
11051
11052  Previous Release:
11053    Non-Debug Version:  78.1K Code, 11.5K Data,  89.6K Total
11054    Debug Version:     164.8K Code, 69.2K Data, 234.0K Total
11055  Current Release:
11056    Non-Debug Version:  78.2K Code, 11.5K Data,  89.7K Total
11057    Debug Version:     164.9K Code, 69.2K Data, 234.1K Total
11058
11059
110602) iASL Compiler/Disassembler:
11061
11062Fixed a code generation problem in the constant folding optimization code
11063where incorrect code was generated if a constant was reduced to a buffer
11064object (i.e., a reduced type 5 opcode.)
11065
11066Fixed a typechecking problem for the ToBuffer operator. Caused by an
11067incorrect return type in the internal opcode information table.
11068
11069----------------------------------------
1107025 January 2005.  Summary of changes for version 20050125:
11071
110721) ACPI CA Core Subsystem:
11073
11074Fixed a recently introduced problem with the Global Lock where the
11075underlying semaphore was not created.  This problem was introduced in
11076version 20050114, and caused an AE_AML_NO_OPERAND exception during an
11077Acquire() operation on _GL.
11078
11079The local object cache is now optional, and is disabled by default. Both
11080AcpiExec and the iASL compiler enable the cache because they run in user
11081mode and this enhances their performance. #define
11082ACPI_ENABLE_OBJECT_CACHE
11083to enable the local cache.
11084
11085Fixed an issue in the internal function AcpiUtEvaluateObject concerning
11086the
11087optional "implicit return" support where an error was returned if no
11088return
11089object was expected, but one was implicitly returned. AE_OK is now
11090returned
11091in this case and the implicitly returned object is deleted.
11092AcpiUtEvaluateObject is only occasionally used, and only to execute
11093reserved
11094methods such as _STA and _INI where the return type is known up front.
11095
11096Fixed a few issues with the internal convert-to-integer code. It now
11097returns
11098an error if an attempt is made to convert a null string, a string of only
11099blanks/tabs, or a zero-length buffer. This affects both implicit
11100conversion
11101and explicit conversion via the ToInteger() operator.
11102
11103The internal debug code in AcpiUtAcquireMutex has been commented out. It
11104is
11105not needed for normal operation and should increase the performance of
11106the
11107entire subsystem. The code remains in case it is needed for debug
11108purposes
11109again.
11110
11111The AcpiExec source and makefile are included in the Unix/Linux package
11112for
11113the first time.
11114
11115Code and Data Size: Current and previous core subsystem library sizes are
11116shown below. These are the code and data sizes for the acpica.lib
11117produced
11118by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11119any ACPI driver or OSPM code. The debug version of the code includes the
11120debug output trace mechanism and has a much larger code and data size.
11121Note
11122that these values will vary depending on the efficiency of the compiler
11123and
11124the compiler options used during generation.
11125
11126  Previous Release:
11127    Non-Debug Version:  78.4K Code,  11.5K Data,   89.9K Total
11128    Debug Version:     165.4K Code,  69.4K Data,  234.8K Total
11129  Current Release:
11130    Non-Debug Version:  78.1K Code,  11.5K Data,   89.6K Total
11131    Debug Version:     164.8K Code,  69.2K Data,  234.0K Total
11132
111332) iASL Compiler/Disassembler:
11134
11135Switch/Case support: A warning is now issued if the type of the Switch
11136value
11137cannot be determined at compile time. For example, Switch(Arg0) will
11138generate the warning, and the type is assumed to be an integer. As per
11139the
11140ACPI spec, use a construct such as Switch(ToInteger(Arg0)) to eliminate
11141the
11142warning.
11143
11144Switch/Case support: Implemented support for buffer and string objects as
11145the switch value.  This is an ACPI 3.0 feature, now that LEqual supports
11146buffers and strings.
11147
11148Switch/Case support: The emitted code for the LEqual() comparisons now
11149uses
11150the switch value as the first operand, not the second. The case value is
11151now
11152the second operand, and this allows the case value to be implicitly
11153converted to the type of the switch value, not the other way around.
11154
11155Switch/Case support: Temporary variables are now emitted immediately
11156within
11157the control method, not at the global level. This means that there are
11158now
1115936 temps available per-method, not 36 temps per-module as was the case
11160with
11161the earlier implementation (_T_0 through _T_9 and _T_A through _T_Z.)
11162
11163----------------------------------------
1116414 January 2005.  Summary of changes for version 20050114:
11165
11166Added 2005 copyright to all module headers.  This affects every module in
11167the core subsystem, iASL compiler, and the utilities.
11168
111691) ACPI CA Core Subsystem:
11170
11171Fixed an issue with the String-to-Buffer conversion code where the string
11172null terminator was not included in the buffer after conversion, but
11173there
11174is existing ASL that assumes the string null terminator is included. This
11175is
11176the root of the ACPI_AML_BUFFER_LIMIT regression. This problem was
11177introduced in the previous version when the code was updated to correctly
11178set the converted buffer size as per the ACPI specification. The ACPI
11179spec
11180is ambiguous and will be updated to specify that the null terminator must
11181be
11182included in the converted buffer. This also affects the ToBuffer() ASL
11183operator.
11184
11185Fixed a problem with the Mid() ASL/AML operator where it did not work
11186correctly on Buffer objects. Newly created sub-buffers were not being
11187marked
11188as initialized.
11189
11190
11191Fixed a problem in AcpiTbFindTable where incorrect string compares were
11192performed on the OemId and OemTableId table header fields.  These fields
11193are
11194not null terminated, so strncmp is now used instead of strcmp.
11195
11196Implemented a restriction on the Store() ASL/AML operator to align the
11197behavior with the ACPI specification.  Previously, any object could be
11198used
11199as the source operand.  Now, the only objects that may be used are
11200Integers,
11201Buffers, Strings, Packages, Object References, and DDB Handles.  If
11202necessary, the original behavior can be restored by enabling the
11203EnableInterpreterSlack flag.
11204
11205Enhanced the optional "implicit return" support to allow an implicit
11206return
11207value from methods that are invoked externally via the AcpiEvaluateObject
11208interface.  This enables implicit returns from the _STA and _INI methods,
11209for example.
11210
11211Changed the Revision() ASL/AML operator to return the current version of
11212the
11213AML interpreter, in the YYYYMMDD format. Previously, it incorrectly
11214returned
11215the supported ACPI version (This is the function of the _REV method).
11216
11217Updated the _REV predefined method to return the currently supported
11218version
11219of ACPI, now 3.
11220
11221Implemented batch mode option for the AcpiExec utility (-b).
11222
11223Code and Data Size: Current and previous core subsystem library sizes are
11224shown below. These are the code and data sizes for the acpica.lib
11225produced
11226by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11227any ACPI driver or OSPM code. The debug version of the code includes the
11228debug output trace mechanism and has a much larger code and data size.
11229Note
11230that these values will vary depending on the efficiency of the compiler
11231and
11232the compiler options used during generation.
11233
11234  Previous Release:
11235    Non-Debug Version:  78.3K Code,  11.5K Data,   89.8K Total
11236    Debug Version:     165.3K Code,  69.4K Data,  234.7K Total
11237  Current Release:
11238    Non-Debug Version:  78.4K Code,  11.5K Data,   89.9K Total
11239    Debug Version:     165.4K Code,  69.4K Data,  234.8K Total
11240
11241----------------------------------------
1124210 December 2004.  Summary of changes for version 20041210:
11243
11244ACPI 3.0 support is nearing completion in both the iASL compiler and the
11245ACPI CA core subsystem.
11246
112471) ACPI CA Core Subsystem:
11248
11249Fixed a problem in the ToDecimalString operator where the resulting
11250string
11251length was incorrectly calculated. The length is now calculated exactly,
11252eliminating incorrect AE_STRING_LIMIT exceptions.
11253
11254Fixed a problem in the ToHexString operator to allow a maximum 200
11255character
11256string to be produced.
11257
11258Fixed a problem in the internal string-to-buffer and buffer-to-buffer
11259copy
11260routine where the length of the resulting buffer was not truncated to the
11261new size (if the target buffer already existed).
11262
11263Code and Data Size: Current and previous core subsystem library sizes are
11264shown below. These are the code and data sizes for the acpica.lib
11265produced
11266by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11267any ACPI driver or OSPM code. The debug version of the code includes the
11268debug output trace mechanism and has a much larger code and data size.
11269Note
11270that these values will vary depending on the efficiency of the compiler
11271and
11272the compiler options used during generation.
11273
11274  Previous Release:
11275    Non-Debug Version:  78.3K Code,  11.5K Data,   89.8K Total
11276    Debug Version:     164.7K Code,  68.5K Data,  233.2K Total
11277  Current Release:
11278    Non-Debug Version:  78.3K Code,  11.5K Data,   89.8K Total
11279    Debug Version:     165.3K Code,  69.4K Data,  234.7K Total
11280
11281
112822) iASL Compiler/Disassembler:
11283
11284Implemented the new ACPI 3.0 resource template macros - DWordSpace,
11285ExtendedIO, ExtendedMemory, ExtendedSpace, QWordSpace, and WordSpace.
11286Includes support in the disassembler.
11287
11288Implemented support for the new (ACPI 3.0) parameter to the Register
11289macro,
11290AccessSize.
11291
11292Fixed a problem where the _HE resource name for the Interrupt macro was
11293referencing bit 0 instead of bit 1.
11294
11295Implemented check for maximum 255 interrupts in the Interrupt macro.
11296
11297Fixed a problem with the predefined resource descriptor names where
11298incorrect AML code was generated if the offset within the resource buffer
11299was 0 or 1.  The optimizer shortened the AML code to a single byte opcode
11300but did not update the surrounding package lengths.
11301
11302Changes to the Dma macro:  All channels within the channel list must be
11303in
11304the range 0-7.  Maximum 8 channels can be specified. BusMaster operand is
11305optional (default is BusMaster).
11306
11307Implemented check for maximum 7 data bytes for the VendorShort macro.
11308
11309The ReadWrite parameter is now optional for the Memory32 and similar
11310macros.
11311
11312----------------------------------------
1131303 December 2004.  Summary of changes for version 20041203:
11314
113151) ACPI CA Core Subsystem:
11316
11317The low-level field insertion/extraction code (exfldio) has been
11318completely
11319rewritten to eliminate unnecessary complexity, bugs, and boundary
11320conditions.
11321
11322Fixed a problem in the ToInteger, ToBuffer, ToHexString, and
11323ToDecimalString
11324operators where the input operand could be inadvertently deleted if no
11325conversion was necessary (e.g., if the input to ToInteger was an Integer
11326object.)
11327
11328Fixed a problem with the ToDecimalString and ToHexString where an
11329incorrect
11330exception code was returned if the resulting string would be > 200 chars.
11331AE_STRING_LIMIT is now returned.
11332
11333Fixed a problem with the Concatenate operator where AE_OK was always
11334returned, even if the operation failed.
11335
11336Fixed a problem in oswinxf (used by AcpiExec and iASL) to allow > 128
11337semaphores to be allocated.
11338
11339Code and Data Size: Current and previous core subsystem library sizes are
11340shown below. These are the code and data sizes for the acpica.lib
11341produced
11342by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11343any ACPI driver or OSPM code. The debug version of the code includes the
11344debug output trace mechanism and has a much larger code and data size.
11345Note
11346that these values will vary depending on the efficiency of the compiler
11347and
11348the compiler options used during generation.
11349
11350  Previous Release:
11351    Non-Debug Version:  78.5K Code,  11.5K Data,   90.0K Total
11352    Debug Version:     165.2K Code,  68.6K Data,  233.8K Total
11353  Current Release:
11354    Non-Debug Version:  78.3K Code,  11.5K Data,   89.8K Total
11355    Debug Version:     164.7K Code,  68.5K Data,  233.2K Total
11356
11357
113582) iASL Compiler/Disassembler:
11359
11360Fixed typechecking for the ObjectType and SizeOf operators.  Problem was
11361recently introduced in 20041119.
11362
11363Fixed a problem with the ToUUID macro where the upper nybble of each
11364buffer
11365byte was inadvertently set to zero.
11366
11367----------------------------------------
1136819 November 2004.  Summary of changes for version 20041119:
11369
113701) ACPI CA Core Subsystem:
11371
11372Fixed a problem in the internal ConvertToInteger routine where new
11373integers
11374were not truncated to 32 bits for 32-bit ACPI tables. This routine
11375converts
11376buffers and strings to integers.
11377
11378Implemented support to store a value to an Index() on a String object.
11379This
11380is an ACPI 2.0 feature that had not yet been implemented.
11381
11382Implemented new behavior for storing objects to individual package
11383elements
11384(via the Index() operator). The previous behavior was to invoke the
11385implicit
11386conversion rules if an object was already present at the index.  The new
11387behavior is to simply delete any existing object and directly store the
11388new
11389object. Although the ACPI specification seems unclear on this subject,
11390other
11391ACPI implementations behave in this manner.  (This is the root of the
11392AE_BAD_HEX_CONSTANT issue.)
11393
11394Modified the RSDP memory scan mechanism to support the extended checksum
11395for
11396ACPI 2.0 (and above) RSDPs. Note that the search continues until a valid
11397RSDP signature is found with a valid checksum.
11398
11399Code and Data Size: Current and previous core subsystem library sizes are
11400shown below. These are the code and data sizes for the acpica.lib
11401produced
11402by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11403any ACPI driver or OSPM code. The debug version of the code includes the
11404debug output trace mechanism and has a much larger code and data size.
11405Note
11406that these values will vary depending on the efficiency of the compiler
11407and
11408the compiler options used during generation.
11409
11410  Previous Release:
11411    Non-Debug Version:  78.5K Code,  11.5K Data,   90.0K Total
11412    Debug Version:     165.2K Code,  68.6K Data,  233.8K Total
11413  Current Release:
11414    Non-Debug Version:  78.5K Code,  11.5K Data,   90.0K Total
11415    Debug Version:     165.2K Code,  68.6K Data,  233.8K Total
11416
11417
114182) iASL Compiler/Disassembler:
11419
11420Fixed a missing semicolon in the aslcompiler.y file.
11421
11422----------------------------------------
1142305 November 2004.  Summary of changes for version 20041105:
11424
114251) ACPI CA Core Subsystem:
11426
11427Implemented support for FADT revision 2.  This was an interim table
11428(between
11429ACPI 1.0 and ACPI 2.0) that adds support for the FADT reset register.
11430
11431Implemented optional support to allow uninitialized LocalX and ArgX
11432variables in a control method.  The variables are initialized to an
11433Integer
11434object with a value of zero.  This support is enabled by setting the
11435AcpiGbl_EnableInterpreterSlack flag to TRUE.
11436
11437Implemented support for Integer objects for the SizeOf operator.  Either
114384
11439or 8 is returned, depending on the current integer size (32-bit or 64-
11440bit,
11441depending on the parent table revision).
11442
11443Fixed a problem in the implementation of the SizeOf and ObjectType
11444operators
11445where the operand was resolved to a value too early, causing incorrect
11446return values for some objects.
11447
11448Fixed some possible memory leaks during exceptional conditions.
11449
11450Code and Data Size: Current and previous core subsystem library sizes are
11451shown below. These are the code and data sizes for the acpica.lib
11452produced
11453by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11454any ACPI driver or OSPM code. The debug version of the code includes the
11455debug output trace mechanism and has a much larger code and data size.
11456Note
11457that these values will vary depending on the efficiency of the compiler
11458and
11459the compiler options used during generation.
11460
11461  Previous Release:
11462    Non-Debug Version:  78.0K Code,  11.5K Data,   89.5K Total
11463    Debug Version:     164.8K Code,  68.6K Data,  233.4K Total
11464  Current Release:
11465    Non-Debug Version:  78.5K Code,  11.5K Data,   90.0K Total
11466    Debug Version:     165.2K Code,  68.6K Data,  233.8K Total
11467
11468
114692) iASL Compiler/Disassembler:
11470
11471Implemented support for all ACPI 3.0 reserved names and methods.
11472
11473Implemented all ACPI 3.0 grammar elements in the front-end, including
11474support for semicolons.
11475
11476Implemented the ACPI 3.0 Function() and ToUUID() macros
11477
11478Fixed a problem in the disassembler where a Scope() operator would not be
11479emitted properly if the target of the scope was in another table.
11480
11481----------------------------------------
1148215 October 2004.  Summary of changes for version 20041015:
11483
11484Note:  ACPI CA is currently undergoing an in-depth and complete formal
11485evaluation to test/verify the following areas. Other suggestions are
11486welcome. This will result in an increase in the frequency of releases and
11487the number of bug fixes in the next few months.
11488  - Functional tests for all ASL/AML operators
11489  - All implicit/explicit type conversions
11490  - Bit fields and operation regions
11491  - 64-bit math support and 32-bit-only "truncated" math support
11492  - Exceptional conditions, both compiler and interpreter
11493  - Dynamic object deletion and memory leaks
11494  - ACPI 3.0 support when implemented
11495  - External interfaces to the ACPI subsystem
11496
11497
114981) ACPI CA Core Subsystem:
11499
11500Fixed two alignment issues on 64-bit platforms - within debug statements
11501in
11502AcpiEvGpeDetect and AcpiEvCreateGpeBlock. Removed references to the
11503Address
11504field within the non-aligned ACPI generic address structure.
11505
11506Fixed a problem in the Increment and Decrement operators where incorrect
11507operand resolution could result in the inadvertent modification of the
11508original integer when the integer is passed into another method as an
11509argument and the arg is then incremented/decremented.
11510
11511Fixed a problem in the FromBCD operator where the upper 32-bits of a 64-
11512bit
11513BCD number were truncated during conversion.
11514
11515Fixed a problem in the ToDecimal operator where the length of the
11516resulting
11517string could be set incorrectly too long if the input operand was a
11518Buffer
11519object.
11520
11521Fixed a problem in the Logical operators (LLess, etc.) where a NULL byte
11522(0)
11523within a buffer would prematurely terminate a compare between buffer
11524objects.
11525
11526Added a check for string overflow (>200 characters as per the ACPI
11527specification) during the Concatenate operator with two string operands.
11528
11529Code and Data Size: Current and previous core subsystem library sizes are
11530shown below. These are the code and data sizes for the acpica.lib
11531produced
11532by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11533any ACPI driver or OSPM code. The debug version of the code includes the
11534debug output trace mechanism and has a much larger code and data size.
11535Note
11536that these values will vary depending on the efficiency of the compiler
11537and
11538the compiler options used during generation.
11539
11540  Previous Release:
11541    Non-Debug Version:  77.8K Code,  11.5K Data,   89.3K Total
11542    Debug Version:     164.6K Code,  68.5K Data,  233.1K Total
11543  Current Release:
11544    Non-Debug Version:  78.0K Code,  11.5K Data,   89.5K Total
11545    Debug Version:     164.8K Code,  68.6K Data,  233.4K Total
11546
11547
11548
115492) iASL Compiler/Disassembler:
11550
11551Allow the use of the ObjectType operator on uninitialized Locals and Args
11552(returns 0 as per the ACPI specification).
11553
11554Fixed a problem where the compiler would fault if there was a syntax
11555error
11556in the FieldName of all of the various CreateXXXField operators.
11557
11558Disallow the use of lower case letters within the EISAID macro, as per
11559the
11560ACPI specification.  All EISAID strings must be of the form "UUUNNNN"
11561Where
11562U is an uppercase letter and N is a hex digit.
11563
11564
11565----------------------------------------
1156606 October 2004.  Summary of changes for version 20041006:
11567
115681) ACPI CA Core Subsystem:
11569
11570Implemented support for the ACPI 3.0 Timer operator. This ASL function
11571implements a 64-bit timer with 100 nanosecond granularity.
11572
11573Defined a new OSL interface, AcpiOsGetTimer. This interface is used to
11574implement the ACPI 3.0 Timer operator.  This allows the host OS to
11575implement
11576the timer with the best clock available. Also, it keeps the core
11577subsystem
11578out of the clock handling business, since the host OS (usually) performs
11579this function.
11580
11581Fixed an alignment issue on 64-bit platforms. The HwLowLevelRead(Write)
11582functions use a 64-bit address which is part of the packed ACPI Generic
11583Address Structure. Since the structure is non-aligned, the alignment
11584macros
11585are now used to extract the address to a local variable before use.
11586
11587Fixed a problem where the ToInteger operator assumed all input strings
11588were
11589hexadecimal. The operator now handles both decimal strings and hex
11590strings
11591(prefixed with "0x").
11592
11593Fixed a problem where the string length in the string object created as a
11594result of the internal ConvertToString procedure could be incorrect. This
11595potentially affected all implicit conversions and also the
11596ToDecimalString
11597and ToHexString operators.
11598
11599Fixed two problems in the ToString operator. If the length parameter was
11600zero, an incorrect string object was created and the value of the input
11601length parameter was inadvertently changed from zero to Ones.
11602
11603Fixed a problem where the optional ResourceSource string in the
11604ExtendedIRQ
11605resource macro was ignored.
11606
11607Simplified the interfaces to the internal division functions, reducing
11608code
11609size and complexity.
11610
11611Code and Data Size: Current and previous core subsystem library sizes are
11612shown below. These are the code and data sizes for the acpica.lib
11613produced
11614by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11615any ACPI driver or OSPM code. The debug version of the code includes the
11616debug output trace mechanism and has a much larger code and data size.
11617Note
11618that these values will vary depending on the efficiency of the compiler
11619and
11620the compiler options used during generation.