xref: /illumos-gate/usr/src/uts/intel/io/acpica/changes.txt (revision 7b1019a6)

----------------------------------------
27 May 2016. Summary of changes for version 20160527:

This release is available at https://acpica.org/downloads


1) ACPICA kernel-resident subsystem:

Temporarily reverted the new arbitrary bit length/alignment support in
AcpiHwRead/AcpiHwWrite for the Generic Address Structure. There have been
a number of regressions with the new code that need to be fully resolved
and tested before this support can be finally integrated into ACPICA.
Apologies for any inconveniences these issues may have caused.

The ACPI message macros are not configurable (ACPI_MSG_ERROR,
ACPI_MSG_EXCEPTION, ACPI_MSG_WARNING, ACPI_MSG_INFO, ACPI_MSG_BIOS_ERROR,
and ACPI_MSG_BIOS_WARNING). Lv Zheng.

Fixed a couple of GCC warnings associated with the use of the -Wcast-qual
option. Adds a new return macro, return_STR. Junk-uk Kim.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version: 136.8K Code, 51.6K Data, 188.4K Total
    Debug Version:     201.5K Code, 82.2K Data, 283.7K Total
  Previous Release:
    Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
    Debug Version:     200.9K Code, 82.2K Data, 283.1K Total

----------------------------------------
22 April 2016. Summary of changes for version 20160422:

1) ACPICA kernel-resident subsystem:

Fixed a regression in the GAS (generic address structure) arbitrary bit
support in AcpiHwRead/AcpiHwWrite. Problem could cause incorrect behavior
and incorrect return values. Lv Zheng. ACPICA BZ 1270.

ACPI 6.0: Added support for new/renamed resource macros. One new argument
was added to each of these macros, and the original name has been
deprecated. The AML disassembler will always disassemble to the new
names. Support for the new macros was added to iASL, disassembler,
resource manager, and the acpihelp utility. ACPICA BZ 1274.

    I2cSerialBus  -> I2cSerialBusV2
    SpiSerialBus  -> SpiSerialBusV2
    UartSerialBus -> UartSerialBusV2

ACPI 6.0: Added support for a new integer field that was appended to the
package object returned by the _BIX method. This adds iASL compile-time
and AML runtime error checking. ACPICA BZ 1273.

ACPI 6.1: Added support for a new PCCT subtable, "HW-Reduced Comm
Subspace Type2" (Headers, Disassembler, and data table compiler).

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
    Debug Version:     201.5K Code, 82.2K Data, 283.7K Total
  Previous Release:
    Non-Debug Version: 137.1K Code, 51.5K Data, 188.6K Total
    Debug Version:     201.0K Code, 82.0K Data, 283.0K Total


2) iASL Compiler/Disassembler and Tools:

iASL: Implemented an ASL grammar extension to allow/enable executable
"module-level code" to be created and executed under the various
operators that create new scopes. This type of AML code is already
supported in all known AML interpreters, and the grammar change will
appear in the next version of the ACPI specification. Simplifies the
conditional runtime creation of named objects under these object types:

    Device
    PowerResource
    Processor
    Scope
    ThermalZone

iASL: Implemented a new ASL extension, a "For" loop macro to add greater
ease-of-use to the ASL language. The syntax is similar to the
corresponding C operator, and is implemented with the existing AML While
opcode -- thus requiring no changes to existing AML interpreters.

    For (Initialize, Predicate, Update) {TermList}

Grammar:
    ForTerm :=
        For (
            Initializer    // Nothing | TermArg => ComputationalData
            Predicate      // Nothing | TermArg => ComputationalData
            Update         // Nothing | TermArg => ComputationalData
        ) {TermList}


iASL: The _HID/_ADR detection and validation has been enhanced to search
under conditionals in order to allow these objects to be conditionally
created at runtime.

iASL: Fixed several issues with the constant folding feature. The
improvement allows better detection and resolution of statements that can
be folded at compile time. ACPICA BZ 1266.

iASL/Disassembler: Fixed a couple issues with the Else{If{}...}
conversion to the ASL ElseIf operator where incorrect ASL code could be
generated.

iASL/Disassembler: Fixed a problem with the ASL+ code disassembly where
sometimes an extra (and extraneous) set of parentheses were emitted for
some combinations of operators. Although this did not cause any problems
with recompilation of the disassembled code, it made the code more
difficult to read. David Box. ACPICA BZ 1231.

iASL: Changed to ignore the unreferenced detection for predefined names
of resource descriptor elements, when the resource descriptor is
created/defined within a control method.

iASL: Disassembler: Fix a possible fault with externally declared Buffer
objects.

----------------------------------------
18 March 2016. Summary of changes for version 20160318:

1) ACPICA kernel-resident subsystem:

Added support for arbitrary bit lengths and bit offsets for registers
defined by the Generic Address Structure. Previously, only aligned bit
lengths of 8/16/32/64 were supported. This was sufficient for many years,
but recently some machines have been seen that require arbitrary bit-
level support. ACPICA BZ 1240. Lv Zheng.

Fixed an issue where the \_SB._INI method sometimes must be evaluated
before any _REG methods are evaluated. Lv Zheng.

Implemented several changes related to ACPI table support
(Headers/Disassembler/TableCompiler):
NFIT: For ACPI 6.1, updated to add some additional new fields and
constants.
FADT: Updated a warning message and set compliance to ACPI 6.1 (Version
6).
DMAR: Added new constants per the 10/2014 DMAR spec.
IORT: Added new subtable per the 10/2015 IORT spec.
HEST: For ACPI 6.1, added new constants and new subtable.
DBG2: Added new constants per the 12/2015 DBG2 spec.
FPDT: Fixed several incorrect fields, add the FPDT boot record structure.
ACPICA BZ 1249.
ERST/EINJ: Updated disassembler with new "Execute Timings" actions.

Updated header support for the DMAR table to match the current version of
the related spec.

Added extensions to the ASL Concatenate operator to allow any ACPI object
to be passed as an operand. Any object other than Integer/String/Buffer
simply returns a string containing the object type. This extends the
usefulness of the Printf macros. Previously, Concatenate would abort the
control method if a non-data object was encountered.

ACPICA source code: Deployed the C "const" keyword across the source code
where appropriate. ACPICA BZ 732. Joerg Sonnenberger (NetBSD).

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version: 137.1K Code, 51.5K Data, 188.6K Total
    Debug Version:     201.0K Code, 82.0K Data, 283.0K Total
  Previous Release:
    Non-Debug Version: 136.2K Code, 51.5K Data, 187.7K Total
    Debug Version:     200.4K Code, 82.0K Data, 282.4K Total


2) iASL Compiler/Disassembler and Tools:

iASL/Disassembler: Improved the heuristic used to determine the number of
arguments for an externally defined control method (a method in another
table). Although this is an improvement, there is no deterministic way to
"guess" the number of method arguments. Only the ACPI 6.0 External opcode
will completely solve this problem as it is deployed (automatically) in
newer BIOS code.

iASL/Disassembler: Fixed an ordering issue for emitted External() ASL
statements that could cause errors when the disassembled file is
compiled. ACPICA BZ 1243. David Box.

iASL: Fixed a regression caused by the merger of the two versions of the
local strtoul64. Because of a dependency on a global variable, strtoul64
could return an error for integers greater than a 32-bit value. ACPICA BZ
1260.

iASL: Fixed a regression where a fault could occur for an ASL Return
statement if it invokes a control method that is not resolved. ACPICA BZ
1264.

AcpiXtract: Improved input file validation: detection of binary files and
non-acpidump text files.

----------------------------------------
12 February 2016. Summary of changes for version 20160212:

1) ACPICA kernel-resident subsystem:

Implemented full support for the ACPI 6.1 specification (released in
January). This version of the specification is available at:
http://www.uefi.org/specifications

Only a relatively small number of changes were required in ACPICA to
support ACPI 6.1, in these areas:
- New predefined names
- New _HID values
- A new subtable for HEST
- A few other header changes for new values

Ensure \_SB_._INI is executed before any _REG methods are executed. There
appears to be existing BIOS code that relies on this behavior. Lv Zheng.

Reverted a change made in version 20151218 which enabled method
invocations to be targets of various ASL operators (SuperName and Target
grammar elements). While the new behavior is supported by the ACPI
specification, other AML interpreters do not support this behavior and
never will. The ACPI specification will be updated for ACPI 6.2 to remove
this support. Therefore, the change was reverted to the original ACPICA
behavior.

ACPICA now supports the GCC 6 compiler.

Current Release: (Note: build changes increased sizes)
    Non-Debug Version: 136.2K Code, 51.5K Data, 187.7K Total
    Debug Version:     200.4K Code, 82.0K Data, 282.4K Total
Previous Release:
    Non-Debug Version: 102.7K Code, 28.4K Data, 131.1K Total
    Debug Version:     200.4K Code, 81.9K Data, 282.3K Total


2) iASL Compiler/Disassembler and Tools:

Completed full support for the ACPI 6.0 External() AML opcode. The
compiler emits an external AML opcode for each ASL External statement.
This opcode is used by the disassembler to assist with the disassembly of
external control methods by specifying the required number of arguments
for the method. AML interpreters do not use this opcode. To ensure that
interpreters do not even see the opcode, a block of one or more external
opcodes is surrounded by an "If(0)" construct. As this feature becomes
commonly deployed in BIOS code, the ability of disassemblers to correctly
disassemble AML code will be greatly improved. David Box.

iASL: Implemented support for an optional cross-reference output file.
The -lx option will create a the cross-reference file with the suffix
"xrf". Three different types of cross-reference are created in this file:
- List of object references made from within each control method
- Invocation (caller) list for each user-defined control method
- List of references to each non-method object in the namespace

iASL: Method invocations as ASL Target operands are now disallowed and
flagged as errors in preparation for ACPI 6.2 (see the description of the
problem above).

----------------------------------------
8 January 2016. Summary of changes for version 20160108:

1) ACPICA kernel-resident subsystem:

Updated all ACPICA copyrights and signons to 2016: Added the 2016
copyright to all source code module headers and utility/tool signons.
This includes the standard Linux dual-license header. This affects
virtually every file in the ACPICA core subsystem, iASL compiler, all
ACPICA utilities, and the ACPICA test suite.

Fixed a regression introduced in version 20151218 concerning the
execution of so-called module-level ASL/AML code. Namespace objects
created under a module-level If() construct were not properly/fully
entered into the namespace and could cause an interpreter fault when
accessed.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

Current Release:
    Non-Debug Version: 102.7K Code, 28.4K Data, 131.1K Total
    Debug Version:     200.4K Code, 81.9K Data, 282.4K Total
  Previous Release:
    Non-Debug Version: 102.6K Code, 28.4K Data, 131.0K Total
    Debug Version:     200.3K Code, 81.9K Data, 282.3K Total


2) iASL Compiler/Disassembler and Tools:

Fixed a problem with the compilation of the GpioIo and GpioInt resource
descriptors. The _PIN field name was incorrectly defined to be an array
of 32-bit values, but the _PIN values are in fact 16 bits each. This
would cause incorrect bit width warnings when using Word (16-bit) fields
to access the descriptors.


----------------------------------------
18 December 2015. Summary of changes for version 20151218:

1) ACPICA kernel-resident subsystem:

Implemented per-AML-table execution of "module-level code" as individual
ACPI tables are loaded into the namespace during ACPICA initialization.
In other words, any module-level code within an AML table is executed
immediately after the table is loaded, instead of batched and executed
after all of the tables have been loaded. This provides compatibility
with other ACPI implementations. ACPICA BZ 1219. Bob Moore, Lv Zheng,
David Box.

To fully support the feature above, the default operation region handlers
for the SystemMemory, SystemIO, and PCI_Config address spaces are now
installed before any ACPI tables are loaded. This enables module-level
code to access these address spaces during the table load and module-
level code execution phase. ACPICA BZ 1220. Bob Moore, Lv Zheng, David
Box.

Implemented several changes to the internal _REG support in conjunction
with the changes above. Also, changes to the AcpiExec/AcpiNames/Examples
utilities for the changes above. Although these tools were changed, host
operating systems that simply use the default handlers for SystemMemory,
SystemIO, and PCI_Config spaces should not require any update. Lv Zheng.

For example, in the code below, DEV1 is conditionally added to the
namespace by the DSDT via module-level code that accesses an operation
region. The SSDT references DEV1 via the Scope operator. DEV1 must be
created immediately after the DSDT is loaded in order for the SSDT to
successfully reference DEV1. Previously, this code would cause an
AE_NOT_EXIST exception during the load of the SSDT. Now, this code is
fully supported by ACPICA.

    DefinitionBlock ("", "DSDT", 2, "Intel", "DSDT1", 1)
    {
        OperationRegion (OPR1, SystemMemory, 0x400, 32)
        Field (OPR1, AnyAcc, NoLock, Preserve)
        {
            FLD1, 1
        }
        If (FLD1)
        {
            Device (\DEV1)
            {
            }
        }
    }
    DefinitionBlock ("", "SSDT", 2, "Intel", "SSDT1", 1)
    {
        External (\DEV1, DeviceObj)
        Scope (\DEV1)
        {
        }
    }

Fixed an AML interpreter problem where control method invocations were
not handled correctly when the invocation was itself a SuperName argument
to another ASL operator. In these cases, the method was not invoked.
ACPICA BZ 1002. Affects the following ASL operators that have a SuperName
argument:
    Store
    Acquire, Wait
    CondRefOf, RefOf
    Decrement, Increment
    Load, Unload
    Notify
    Signal, Release, Reset
    SizeOf

Implemented automatic String-to-ObjectReference conversion support for
packages returned by predefined names (such as _DEP). A common BIOS error
is to add double quotes around an ObjectReference namepath, which turns
the reference into an unexpected string object. This support detects the
problem and corrects it before the package is returned to the caller that
invoked the method. Lv Zheng.

Implemented extensions to the Concatenate operator. Concatenate now
accepts any type of object, it is not restricted to simply
Integer/String/Buffer. For objects other than these 3 basic data types,
the argument is treated as a string containing the name of the object
type. This expands the utility of Concatenate and the Printf/Fprintf
macros. ACPICA BZ 1222.

Cleaned up the output of the ASL Debug object. The timer() value is now
optional and no longer emitted by default. Also, the basic data types of
Integer/String/Buffer are simply emitted as their values, without a data
type string -- since the data type is obvious from the output. ACPICA BZ
1221.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version: 102.6K Code, 28.4K Data, 131.0K Total
    Debug Version:     200.3K Code, 81.9K Data, 282.3K Total
  Previous Release:
    Non-Debug Version: 102.0K Code, 28.3K Data, 130.3K Total
    Debug Version:     199.6K Code, 81.8K Data, 281.4K Total


2) iASL Compiler/Disassembler and Tools:

iASL: Fixed some issues with the ASL Include() operator. This operator
was incorrectly defined in the iASL parser rules, causing a new scope to
be opened for the code within the include file. This could lead to
several issues, including allowing ASL code that is technically illegal
and not supported by AML interpreters. Note, this does not affect the
related #include preprocessor operator. ACPICA BZ 1212.

iASL/Disassembler: Implemented support for the ASL ElseIf operator. This
operator is essentially an ASL macro since there is no AML opcode
associated with it. The code emitted by the iASL compiler for ElseIf is
an Else opcode followed immediately by an If opcode. The disassembler
will now emit an ElseIf if it finds an Else immediately followed by an
If. This simplifies the decoded ASL, especially for deeply nested
If..Else and large Switch constructs. Thus, the disassembled code more
closely follows the original source ASL. ACPICA BZ 1211. Example:

    Old disassembly:
        Else
        {
            If (Arg0 == 0x02)
            {
                Local0 = 0x05
            }
        }

    New disassembly:
        ElseIf (Arg0 == 0x02)
        {
            Local0 = 0x05
        }

AcpiExec: Added support for the new module level code behavior and the
early region installation. This required a small change to the
initialization, since AcpiExec must install its own operation region
handlers.

AcpiExec: Added support to make the debug object timer optional. Default
is timer disabled. This cleans up the debug object output -- the timer
data is rarely used.

AcpiExec: Multiple ACPI tables are now loaded in the order that they
appear on the command line. This can be important when there are
interdependencies/references between the tables.

iASL/Templates. Add support to generate template files with multiple
SSDTs within a single output file. Also added ommand line support to
specify the number of SSDTs (in addition to a single DSDT). ACPICA BZ
1223, 1225.


----------------------------------------
24 November 2015. Summary of changes for version 20151124:

1) ACPICA kernel-resident subsystem:

Fixed a possible regression for a previous update to FADT handling. The
FADT no longer has a fixed table ID, causing some issues with code that
was hardwired to a specific ID. Lv Zheng.

Fixed a problem where the method auto-serialization could interfere with
the current SyncLevel. This change makes the auto-serialization support
transparent to the SyncLevel support and management.

Removed support for the _SUB predefined name in AcpiGetObjectInfo. This
interface is intended for early access to the namespace during the
initial namespace device discovery walk. The _SUB method has been seen to
access operation regions in some cases, causing errors because the
operation regions are not fully initialized.

AML Debugger: Fixed some issues with the terminate/quit/exit commands
that can cause faults. Lv Zheng.

AML Debugger: Add thread ID support so that single-step mode only applies
to the AML Debugger thread. This prevents runtime errors within some
kernels. Lv Zheng.

Eliminated extraneous warnings from AcpiGetSleepTypeData. Since the _Sx
methods that are invoked by this interface are optional, removed warnings
emitted for the case where one or more of these methods do not exist.
ACPICA BZ 1208, original change by Prarit Bhargava.

Made a major pass through the entire ACPICA source code base to
standardize formatting that has diverged a bit over time. There are no
functional changes, but this will of course cause quite a few code
differences from the previous ACPICA release.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version: 102.0K Code, 28.3K Data, 130.3K Total
    Debug Version:     199.6K Code, 81.8K Data, 281.4K Total
  Previous Release:
    Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
    Debug Version:     199.3K Code, 81.4K Data, 280.7K Total


2) iASL Compiler/Disassembler and Tools:

iASL/acpiexec/acpixtract/disassembler: Added support to allow multiple
definition blocks within a single ASL file and the resulting AML file.
Support for this type of file was also added to the various tools that
use binary AML files: acpiexec, acpixtract, and the AML disassembler. The
example code below shows two definition blocks within the same file:

    DefinitionBlock ("dsdt.aml", "DSDT", 2, "Intel", "Template",
0x12345678)
    {
    }
    DefinitionBlock ("", "SSDT", 2, "Intel", "Template", 0xABCDEF01)
    {
    }

iASL: Enhanced typechecking for the Name() operator. All expressions for
the value of the named object must be reduced/folded to a single constant
at compile time, as per the ACPI specification (the AML definition of
Name()).

iASL: Fixed some code indentation issues for the -ic and -ia options (C
and assembly headers). Now all emitted code correctly begins in column 1.

iASL: Added an error message for an attempt to open a Scope() on an
object defined in an SSDT. The DSDT is always loaded into the namespace
first, so any attempt to open a Scope on an SSDT object will fail at
runtime.


----------------------------------------
30 September 2015. Summary of changes for version 20150930:

1) ACPICA kernel-resident subsystem:

Debugger: Implemented several changes and bug fixes to assist support for
the in-kernel version of the AML debugger. Lv Zheng.
- Fix the "predefined" command for in-kernel debugger.
- Do not enter debug command loop for the help and version commands.
- Disallow "execute" command during execution/single-step of a method.

Interpreter: Updated runtime typechecking for all operators that have
target operands. The operand is resolved and validated that it is legal.
For example, the target cannot be a non-data object such as a Device,
Mutex, ThermalZone, etc., as per the ACPI specification.

Debugger: Fixed the double-mutex user I/O handshake to work when local
deadlock detection is enabled.

Debugger: limited display of method locals and arguments (LocalX and
ArgX) to only those that have actually been initialized. This prevents
lines of extraneous output.

Updated the definition of the NFIT table to correct the bit polarity of
one flag: ACPI_NFIT_MEM_ARMED --> ACPI_NFIT_MEM_NOT_ARMED

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
    Debug Version:     199.3K Code, 81.4K Data, 280.7K Total
  Previous Release:
    Non-Debug Version: 101.3K Code, 27.7K Data, 129.0K Total
    Debug Version:     198.6K Code, 80.9K Data, 279.5K Total


2) iASL Compiler/Disassembler and Tools:

iASL: Improved the compile-time typechecking for operands of many of the
ASL operators:

-- Added an option to disable compiler operand/operator typechecking (-
ot).

-- For the following operators, the TermArg operands are now validated
when possible to be Integer data objects: BankField, OperationRegion,
DataTableRegion, Buffer, and Package.

-- Store (Source, Target): Both the source and target operands are
resolved and checked that the operands are both legal. For example,
neither operand can be a non-data object such as a Device, Mutex,
ThermalZone, etc. Note, as per the ACPI specification, the CopyObject
operator can be used to store an object to any type of target object.

-- Store (Source, Target): If the source is a Package object, the target
must be a Package object, LocalX, ArgX, or Debug. Likewise, if the target
is a Package, the source must also be a Package.

-- Store (Source, Target): A warning is issued if the source and target
resolve to the identical named object.

-- Store (Source, <method invocation>): An error is generated for the
target method invocation, as this construct is not supported by the AML
interpreter.

-- For all ASL math and logic operators, the target operand must be a
data object (Integer, String, Buffer, LocalX, ArgX, or Debug). This
includes the function return value also.

-- External declarations are also included in the typechecking where
possible. External objects defined using the UnknownObj keyword cannot be
typechecked, however.

iASL and Disassembler: Added symbolic (ASL+) support for the ASL Index
operator:
- Legacy code: Index(PKG1, 3)
- New ASL+ code: PKG1[3]
This completes the ACPI 6.0 ASL+ support as it was the only operator not
supported.

iASL: Fixed the file suffix for the preprocessor output file (.i). Two
spaces were inadvertently appended to the filename, causing file access
and deletion problems on some systems.

ASL Test Suite (ASLTS): Updated the master makefile to generate all
possible compiler output files when building the test suite -- thus
exercising these features of the compiler. These files are automatically
deleted when the test suite exits.


----------------------------------------
18 August 2015. Summary of changes for version 20150818:

1) ACPICA kernel-resident subsystem:

Fix a regression for AcpiGetTableByIndex interface causing it to fail. Lv
Zheng. ACPICA BZ 1186.

Completed development to ensure that the ACPICA Disassembler and Debugger
are fully standalone components of ACPICA. Removed cross-component
dependences. Lv Zheng.

The max-number-of-AML-loops is now runtime configurable (previously was
compile-time only). This is essentially a loop timeout to force-abort
infinite AML loops. ACPCIA BZ 1192.

Debugger: Cleanup output to dump ACPI names and namepaths without any
trailing underscores. Lv Zheng. ACPICA BZ 1135.

Removed unnecessary conditional compilations across the Debugger and
Disassembler components where entire modules could be left uncompiled.

The aapits test is deprecated and has been removed from the ACPICA git
tree. The test has never been completed and has not been maintained, thus
becoming rather useless. ACPICA BZ 1015, 794.

A batch of small changes to close bugzilla and other reports:
- Remove duplicate code for _PLD processing. ACPICA BZ 1176.
- Correctly cleanup after a ACPI table load failure. ACPICA BZ 1185.
- iASL: Support POSIX yacc again in makefile. Jung-uk Kim.
- ACPI table support: general cleanup and simplification. Lv Zheng, Bob
Moore.
- ACPI table support: fix for a buffer read overrun in AcpiTbFindTable.
ACPICA BZ 1184.
- Enhance parameter validation for DataTableRegion and LoadTable ASL/AML
operators.
- Debugger: Split debugger initialization/termination interfaces. Lv
Zheng.
- AcpiExec: Emit OemTableId for SSDTs during the load phase for table
identification.
- AcpiExec: Add debug message during _REG method phase during table
load/init.
- AcpiNames: Fix a regression where some output was missing and no longer
emitted.
- Debugger: General cleanup and simplification. Lv Zheng.
- Disassembler: Cleanup use of several global option variables. Lv Zheng.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version: 101.3K Code, 27.7K Data, 129.0K Total
    Debug Version:     198.6K Code, 80.9K Data, 279.5K Total
  Previous Release:
    Non-Debug Version: 100.9K Code, 24.5K Data, 125.4K Total
    Debug Version:     197.8K Code, 81.5K Data, 279.3K Total


2) iASL Compiler/Disassembler and Tools:

AcpiExec: Fixed a problem where any more than 32 ACPI tables in the XSDT
were not handled properly and caused load errors. Now, properly invoke
and use the ACPICA auto-reallocate mechanism for ACPI table data
structures. ACPICA BZ 1188

AcpiNames: Add command-line wildcard support for ACPI table files. ACPICA
BZ 1190.

AcpiExec and AcpiNames: Add -l option to load ACPI tables only. For
AcpiExec, this means that no control methods (like _REG/_INI/_STA) are
executed during initialization. ACPICA BZ 1187, 1189.

iASL/Disassembler: Implemented a prototype "listing" mode that emits AML
that corresponds to each disassembled ASL statement, to simplify
debugging. ACPICA BZ 1191.

Debugger: Add option to the "objects" command to display a summary of the
current namespace objects (Object type and count). This is displayed if
the command is entered with no arguments.

AcpiNames: Add -x option to specify debug level, similar to AcpiExec.


----------------------------------------
17 July 2015. Summary of changes for version 20150717:

1) ACPICA kernel-resident subsystem:

Improved the partitioning between the Debugger and Disassembler
components. This allows the Debugger to be used standalone within kernel
code without the Disassembler (which is used for single stepping also).
This renames and moves one file, dmobject.c to dbobject.c. Lv Zheng.

Debugger: Implemented a new command to trace the execution of control
methods (Trace). This is especially useful for the in-kernel version of
the debugger when file I/O may not be available for method trace output.
See the ACPICA reference for more information. Lv Zheng.

Moved all C library prototypes (used for the local versions of these
functions when requested) to a new header, acclib.h
Cleaned up the use of non-ANSI C library functions. These functions are
implemented locally in ACPICA. Moved all such functions to a common
source file, utnonansi.c

Debugger: Fixed a problem with the "!!" command (get last command
executed) where the debugger could enter an infinite loop and eventually
crash.

Removed the use of local macros that were used for some of the standard C
library functions to automatically cast input parameters. This mostly
affected the is* functions where the input parameter is defined to be an
int. This required a few modifications to the main ACPICA source code to
provide casting for these functions and eliminate possible compiler
warnings for these parameters.

Across the source code, added additional status/error checking to resolve
issues discovered by static source code analysis tools such as Coverity.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version: 100.9K Code, 24.5K Data, 125.4K Total
    Debug Version:     197.8K Code, 81.5K Data, 279.3K Total
  Previous Release:
    Non-Debug Version: 100.6K Code, 27.6K Data, 128.2K Total
    Debug Version:     196.2K Code, 81.0K Data, 277.2K Total


2) iASL Compiler/Disassembler and Tools:

iASL: Fixed a regression where the device map file feature no longer
worked properly when used in conjunction with the disassembler. It only
worked properly with the compiler itself.

iASL: Implemented a new warning for method LocalX variables that are set
but never used (similar to a C compiler such as gcc). This also applies
to ArgX variables that are not defined by the parent method, and are
instead (legally) used as local variables.

iASL/Preprocessor: Finished the pass-through of line numbers from the
preprocessor to the compiler. This ensures that compiler errors/warnings
have the correct original line numbers and filenames, regardless of any
#include files.

iASL/Preprocessor: Fixed a couple of issues with comment handling and the
pass-through of comments to the preprocessor output file (which becomes
the compiler input file). Also fixed a problem with // comments that
appear after a math expression.

iASL: Added support for the TCPA server table to the table compiler and
template generator. (The client table was already previously supported)

iASL/Preprocessor: Added a permanent #define of the symbol "__IASL__" to
identify the iASL compiler.

Cleaned up the use of the macros NEGATIVE and POSITIVE which were defined
multiple times. The new names are ACPI_SIGN_NEGATIVE and
ACPI_SIGN_POSITIVE.

AcpiHelp: Update to expand help messages for the iASL preprocessor
directives.


----------------------------------------
19 June 2015. Summary of changes for version 20150619:

Two regressions in version 20150616 have been addressed:

Fixes some problems/issues with the C library macro removal (ACPI_STRLEN,
etc.) This update changes ACPICA to only use the standard headers for
functions, or the prototypes for the local versions of the C library
functions. Across the source code, this required some additional casts
for some Clib invocations for portability. Moved all local prototypes to
a new file, acclib.h

Fixes several problems with recent changes to the handling of the FACS
table that could cause some systems not to boot.


----------------------------------------
16 June 2015. Summary of changes for version 20150616:


1) ACPICA kernel-resident subsystem:

Across the entire ACPICA source code base, the various macros for the C
library functions (such as ACPI_STRLEN, etc.) have been removed and
replaced by the standard C library names (strlen, etc.) The original
purpose for these macros is no longer applicable. This simplification
reduces the number of macros used in the ACPICA source code
significantly, improving readability and maintainability.

Implemented support for a new ACPI table, the OSDT. This table, the
"override" SDT, can be loaded directly by the host OS at boot time. It
enables the replacement of existing namespace objects that were installed
via the DSDT and/or SSDTs. The primary purpose for this is to replace
buggy or incorrect ASL/AML code obtained via the BIOS. The OSDT is slated
for inclusion in a future version of the ACPI Specification. Lv Zheng/Bob
Moore.

Added support for systems with (improperly) two FACS tables -- a "32-bit"
table (via FADT 32-bit legacy field) and a "64-bit" table (via the 64-bit
X field). This change will support both automatically. There continues to
be systems found with this issue. This support requires a change to the
AcpiSetFirmwareWakingVector interface. Also, a public global variable has
been added to allow the host to select which FACS is desired
(AcpiGbl_Use32BitFacsAddresses). See the ACPICA reference for more
details Lv Zheng.

Added a new feature to allow for systems that do not contain an FACS.
Although this is already supported on hardware-reduced platforms, the
feature has been extended for all platforms. The reasoning is that we do
not want to abort the entire ACPICA initialization just because the
system is seriously buggy and has no FACS.

Fixed a problem where the GUID strings for NFIT tables (in acuuid.h) were
not correctly transcribed from the ACPI specification in ACPICA version
20150515.

Implemented support for the _CLS object in the AcpiGetObjectInfo external
interface.

Updated the definitions of the TCPA and TPM2 ACPI tables to the more
recent TCG ACPI Specification, December 14, 2014. Table disassembler and
compiler also updated. Note: The TCPA "server" table is not supported by
the disassembler/table-compiler at this time.

ACPI 6.0: Added definitions for the new GIC version field in the MADT.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version: 100.6K Code, 27.6K Data, 128.2K Total
    Debug Version:     196.2K Code, 81.0K Data, 277.2K Total
  Previous Release:
    Non-Debug Version:  99.9K Code, 27.5K Data, 127.4K Total
    Debug Version:     195.2K Code, 80.8K Data, 276.0K Total


2) iASL Compiler/Disassembler and Tools:

Disassembler: Fixed a problem with the new symbolic operator disassembler
where incorrect ASL code could be emitted in some cases for the "non-
commutative" operators -- Subtract, Divide, Modulo, ShiftLeft, and
ShiftRight. The actual problem cases seem to be rather unusual in common
ASL code, however. David Box.

Modified the linux version of acpidump to obtain ACPI tables from not
just /dev/mem (which may not exist) and /sys/firmware/acpi/tables. Lv
Zheng.

iASL: Fixed a problem where the user preprocessor output file (.i)
contained extra data that was not expected. The compiler was using this
file as a temporary file and passed through #line directives in order to
keep compiler error messages in sync with the input file and line number
across multiple include files. The (.i) is no longer a temporary file as
the compiler uses a new, different file for the original purpose.

iASL: Fixed a problem where comments within the original ASL source code
file were not passed through to the preprocessor output file, nor any
listing files.

iASL: Fixed some issues for the handling of the "#include" preprocessor
directive and the similar (but not the same) "Include" ASL operator.

iASL: Add support for the new OSDT in both the disassembler and compiler.

iASL: Fixed a problem with the constant folding support where a Buffer
object could be incorrectly generated (incorrectly formed) during a
conversion to a Store() operator.

AcpiHelp: Updated for new NFIT GUIDs, "External" AML opcode, and new
description text for the _REV predefined name. _REV now permanently
returns 2, as per the ACPI 6.0 specification.

Debugger: Enhanced the output of the Debug ASL object for references
produced by the Index operator. For Buffers and strings, only output the
actual byte pointed to by the index. For packages, only print the single
package element decoded by the index. Previously, the entire
buffer/string/package was emitted.

iASL/Table-compiler: Fixed a regression where the "generic" data types
were no longer recognized, causing errors.


----------------------------------------
15 May 2015. Summary of changes for version 20150515:

This release implements most of ACPI 6.0 as described below.

1) ACPICA kernel-resident subsystem:

Implemented runtime argument checking and return value checking for all
new ACPI 6.0 predefined names. This includes: _BTH, _CR3, _DSD, _LPI,
_MTL, _PRR, _RDI, _RST, _TFP, _TSN.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version:  99.9K Code, 27.5K Data, 127.4K Total
    Debug Version:     195.2K Code, 80.8K Data, 276.0K Total
  Previous Release:
    Non-Debug Version:  99.1K Code, 27.3K Data, 126.4K Total
    Debug Version:     192.8K Code, 79.9K Data, 272.7K Total


2) iASL Compiler/Disassembler and Tools:

iASL compiler: Added compile-time support for all new ACPI 6.0 predefined
names (argument count validation and return value typechecking.)

iASL disassembler and table compiler: implemented support for all new
ACPI 6.0 tables. This includes: DRTM, IORT, LPIT, NFIT, STAO, WPBT, XENV.

iASL disassembler and table compiler: Added ACPI 6.0 changes to existing
tables: FADT, MADT.

iASL preprocessor: Added a new directive to enable inclusion of binary
blobs into ASL code. The new directive is #includebuffer. It takes a
binary file as input and emits a named ascii buffer object into the ASL
code.

AcpiHelp: Added support for all new ACPI 6.0 predefined names.

AcpiHelp: Added a new option, -d, to display all iASL preprocessor
directives.

AcpiHelp: Added a new option, -t, to display all known/supported ACPI
tables.


----------------------------------------
10 April 2015. Summary of changes for version 20150410:

Reverted a change introduced in version 20150408 that caused
a regression in the disassembler where incorrect operator
symbols could be emitted.


----------------------------------------
08 April 2015. Summary of changes for version 20150408:


1) ACPICA kernel-resident subsystem:

Permanently set the return value for the _REV predefined name. It now
returns 2 (was 5). This matches other ACPI implementations. _REV will be
deprecated in the future, and is now defined to be 1 for ACPI 1.0, and 2
for ACPI 2.0 and later. It should never be used to differentiate or
identify operating systems.

Added the "Windows 2015" string to the _OSI support. ACPICA will now
return TRUE to a query with this string.

Fixed several issues with the local version of the printf function.

Added the C99 compiler option (-std=c99) to the Unix makefiles.

  Current Release:
    Non-Debug Version:  99.9K Code, 27.4K Data, 127.3K Total
    Debug Version:     195.2K Code, 80.7K Data, 275.9K Total
  Previous Release:
    Non-Debug Version:  98.8K Code, 27.3K Data, 126.1K Total
    Debug Version:     192.1K Code, 79.8K Data, 271.9K Total


2) iASL Compiler/Disassembler and Tools:

iASL: Implemented an enhancement to the constant folding feature to
transform the parse tree to a simple Store operation whenever possible:
    Add (2, 3, X) ==> is converted to: Store (5, X)
    X = 2 + 3     ==> is converted to: Store (5, X)

Updated support for the SLIC table (Software Licensing Description Table)
in both the Data Table compiler and the disassembler. The SLIC table
support now conforms to "Microsoft Software Licensing Tables (SLIC and
MSDM). November 29, 2011. Copyright 2011 Microsoft". Note: Any SLIC data
following the ACPI header is now defined to be "Proprietary Data", and as
such, can only be entered or displayed as a hex data block.

Implemented full support for the MSDM table as described in the document
above. Note: The format of MSDM is similar to SLIC. Any MSDM data
following the ACPI header is defined to be "Proprietary Data", and can
only be entered or displayed as a hex data block.

Implemented the -Pn option for the iASL Table Compiler (was only
implemented for the ASL compiler). This option disables the iASL
preprocessor.

Disassembler: For disassembly of Data Tables, added a comment field
around the Ascii equivalent data that is emitted as part of the "Raw
Table Data" block. This prevents the iASL Preprocessor from possible
confusion if/when the table is compiled.

Disassembler: Added an option (-df) to force the disassembler to assume
that the table being disassembled contains valid AML. This feature is
useful for disassembling AML files that contain ACPI signatures other
than DSDT or SSDT (such as OEMx or other signatures).

Changes for the EFI version of the tools:
1) Fixed a build error/issue
2) Fixed a cast warning

iASL: Fixed a path issue with the __FILE__ operator by making the
directory prefix optional within the internal SplitInputFilename
function.

Debugger: Removed some unused global variables.

Tests: Updated the makefile for proper generation of the AAPITS suite.


----------------------------------------
04 February 2015. Summary of changes for version 20150204:

ACPICA kernel-resident subsystem:

Updated all ACPICA copyrights and signons to 2014. Added the 2014
copyright to all module headers and signons, including the standard Linux
header. This affects virtually every file in the ACPICA core subsystem,
iASL compiler, all ACPICA utilities, and the test suites.

Events: Introduce ACPI_GPE_DISPATCH_RAW_HANDLER to fix GPE storm issues.
A raw gpe handling mechanism was created to allow better handling of GPE
storms that aren't easily managed by the normal handler. The raw handler
allows disabling/renabling of the the GPE so that interrupt storms can be
avoided in cases where events cannot be timely serviced. In this
scenario, handlers should use the AcpiSetGpe() API to disable/enable the
GPE. This API will leave the reference counts undisturbed, thereby
preventing unintentional clearing of the GPE when the intent in only to
temporarily disable it. Raw handlers allow enabling and disabling of a
GPE by removing GPE register locking. As such, raw handlers much provide
their own locks while using GPE API's to protect access to GPE data
structures.
Lv Zheng

Events: Always modify GPE registers under the GPE lock.
Applies GPE lock around AcpiFinishGpe() to protect access to GPE register
values. Reported as bug by joe.liu@apple.com.

Unix makefiles: Separate option to disable optimizations and
_FORTIFY_SOURCE. This change removes the _FORTIFY_SOURCE flag from the
NOOPT disable option and creates a separate flag (NOFORTIFY) for this
purpose. Some toolchains may define _FORTIFY_SOURCE which leads redefined
errors when building ACPICA. This allows disabling the option without
also having to disable optimazations.
David Box

  Current Release:
    Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
    Debug Version:     199.2K Code, 82.4K Data, 281.6K Total

--
--------------------------------------
07 November 2014. Summary of changes for version 20141107:

This release is available at https://acpica.org/downloads

This release introduces and implements language extensions to ASL that
provide support for symbolic ("C-style") operators and expressions. These
language extensions are known collectively as ASL+.


1) iASL Compiler/Disassembler and Tools:

Disassembler: Fixed a problem with disassembly of the UartSerialBus
macro. Changed "StopBitsNone" to the correct "StopBitsZero". David E.
Box.

Disassembler: Fixed the Unicode macro support to add escape sequences.
All non-printable ASCII values are emitted as escape sequences, as well
as the standard escapes for quote and backslash. Ensures that the
disassembled macro can be correctly recompiled.

iASL: Added Printf/Fprintf macros for formatted output. These macros are
translated to existing AML Concatenate and Store operations. Printf
writes to the ASL Debug object. Fprintf allows the specification of an
ASL name as the target. Only a single format specifier is required, %o,
since the AML interpreter dynamically converts objects to the required
type. David E. Box.

    (old)    Store (Concatenate (Concatenate (Concatenate (Concatenate
                 (Concatenate (Concatenate (Concatenate ("", Arg0),
                 ": Unexpected value for "), Arg1), ", "), Arg2),
                 " at line "), Arg3), Debug)

    (new)    Printf ("%o: Unexpected value for %o, %o at line %o",
                 Arg0, Arg1, Arg2, Arg3)

    (old)    Store (Concatenate (Concatenate (Concatenate (Concatenate
                 ("", Arg1), ": "), Arg0), " Successful"), STR1)

    (new)    Fprintf (STR1, "%o: %o Successful", Arg1, Arg0)

iASL: Added debug options (-bp, -bt) to dynamically prune levels of the
ASL parse tree before the AML code is generated. This allows blocks of
ASL code to be removed in order to help locate and identify problem
devices and/or code. David E. Box.

AcpiExec: Added support (-fi) for an optional namespace object
initialization file. This file specifies initial values for namespace
objects as necessary for debugging and testing different ASL code paths
that may be taken as a result of BIOS options.


2) Overview of symbolic operator support for ASL (ASL+)
-------------------------------------------------------

As an extension to the ASL language, iASL implements support for symbolic
(C-style) operators for math and logical expressions. This can greatly
simplify ASL code as well as improve both readability and
maintainability. These language extensions can exist concurrently with
all legacy ASL code and expressions.

The symbolic extensions are 100% compatible with existing AML
interpreters, since no new AML opcodes are created. To implement the
extensions, the iASL compiler transforms the symbolic expressions into
the legacy ASL/AML equivalents at compile time.

Full symbolic expressions are supported, along with the standard C
precedence and associativity rules.

Full disassembler support for the symbolic expressions is provided, and
creates an automatic migration path for existing ASL code to ASL+ code
via the disassembly process. By default, the disassembler now emits ASL+
code with symbolic expressions. An option (-dl) is provided to force the
disassembler to emit legacy ASL code if desired.

Below is the complete list of the currently supported symbolic operators
with examples. See the iASL User Guide for additional information.


ASL+ Syntax      Legacy ASL Equivalent
-----------      ---------------------

    // Math operators

Z = X + Y        Add (X, Y, Z)
Z = X - Y        Subtract (X, Y, Z)
Z = X * Y        Multiply (X, Y, Z)
Z = X / Y        Divide (X, Y, , Z)
Z = X % Y        Mod (X, Y, Z)
Z = X << Y       ShiftLeft (X, Y, Z)
Z = X >> Y       ShiftRight (X, Y, Z)
Z = X & Y        And (X, Y, Z)
Z = X | Y        Or (X, Y, Z)
Z = X ^ Y        Xor (X, Y, Z)
Z = ~X           Not (X, Z)
X++              Increment (X)
X--              Decrement (X)

    // Logical operators

(X == Y)         LEqual (X, Y)
(X != Y)         LNotEqual (X, Y)
(X < Y)          LLess (X, Y)
(X > Y)          LGreater (X, Y)
(X <= Y)         LLessEqual (X, Y)
(X >= Y)         LGreaterEqual (X, Y)
(X && Y)         LAnd (X, Y)
(X || Y)         LOr (X, Y)
(!X)             LNot (X)

    // Assignment and compound assignment operations

X = Y           Store (Y, X)
X += Y          Add (X, Y, X)
X -= Y          Subtract (X, Y, X)
X *= Y          Multiply (X, Y, X)
X /= Y          Divide (X, Y, , X)
X %= Y          Mod (X, Y, X)
X <<= Y         ShiftLeft (X, Y, X)
X >>= Y         ShiftRight (X, Y, X)
X &= Y          And (X, Y, X)
X |= Y          Or (X, Y, X)
X ^= Y          Xor (X, Y, X)


3) ASL+ Examples:
-----------------

Legacy ASL:
        If (LOr (LOr (LEqual (And (R510, 0x03FB), 0x02E0), LEqual (
            And (R520, 0x03FB), 0x02E0)), LOr (LEqual (And (R530,
0x03FB),
            0x02E0), LEqual (And (R540, 0x03FB), 0x02E0))))
        {
            And (MEMB, 0xFFFFFFF0, SRMB)
            Store (MEMB, Local2)
            Store (PDBM, Local1)
            And (PDBM, 0xFFFFFFFFFFFFFFF9, PDBM)
            Store (SRMB, MEMB)
            Or (PDBM, 0x02, PDBM)
        }

ASL+ version:
        If (((R510 & 0x03FB) == 0x02E0) ||
            ((R520 & 0x03FB) == 0x02E0) ||
            ((R530 & 0x03FB) == 0x02E0) ||
            ((R540 & 0x03FB) == 0x02E0))
        {
            SRMB = (MEMB & 0xFFFFFFF0)
            Local2 = MEMB
            Local1 = PDBM
            PDBM &= 0xFFFFFFFFFFFFFFF9
            MEMB = SRMB
            PDBM |= 0x02
        }

Legacy ASL:
        Store (0x1234, Local1)
        Multiply (Add (Add (Local1, TEST), 0x20), Local2, Local3)
        Multiply (Local2, Add (Add (Local1, TEST), 0x20), Local3)
        Add (Local1, Add (TEST, Multiply (0x20, Local2)), Local3)
        Store (Index (PKG1, 0x03), Local6)
        Store (Add (Local3, Local2), Debug)
        Add (Local1, 0x0F, Local2)
        Add (Local1, Multiply (Local2, Local3), Local2)
        Multiply (Add (Add (Local1, TEST), 0x20), ToBCD (Local1), Local3)

ASL+ version:
        Local1 = 0x1234
        Local3 = (((Local1 + TEST) + 0x20) * Local2)
        Local3 = (Local2 * ((Local1 + TEST) + 0x20))
        Local3 = (Local1 + (TEST + (0x20 * Local2)))
        Local6 = Index (PKG1, 0x03)
        Debug = (Local3 + Local2)
        Local2 = (Local1 + 0x0F)
        Local2 = (Local1 + (Local2 * Local3))
        Local3 = (((Local1 + TEST) + 0x20) * ToBCD (Local1))


----------------------------------------
26 September 2014. Summary of changes for version 20140926:

1) ACPICA kernel-resident subsystem:

Updated the GPIO operation region handler interface (GeneralPurposeIo).
In order to support GPIO Connection objects with multiple pins, along
with the related Field objects, the following changes to the interface
have been made: The Address is now defined to be the offset in bits of
the field unit from the previous invocation of a Connection. It can be
viewed as a "Pin Number Index" into the connection resource descriptor.
The BitWidth is the exact bit width of the field. It is usually one bit,
but not always. See the ACPICA reference guide (section 8.8.6.2.1) for
additional information and examples.

GPE support: During ACPICA/GPE initialization, ensure that all GPEs with
corresponding _Lxx/_Exx methods are disabled (they may have been enabled
by the firmware), so that they cannot fire until they are enabled via
AcpiUpdateAllGpes. Rafael J. Wysocki.

Added a new return flag for the Event/GPE status interfaces --
AcpiGetEventStatus and AcpiGetGpeStatus. The new
ACPI_EVENT_FLAGS_HAS_HANDLER flag is used to indicate that the event or
GPE currently has a handler associated with it, and can thus actually
affect the system. Lv Zheng.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version:  99.1K Code, 27.3K Data, 126.4K Total
    Debug Version:     192.8K Code, 79.9K Data, 272.7K Total
  Previous Release:
    Non-Debug Version:  98.8K Code, 27.3K Data, 126.1K Total
    Debug Version:     192.1K Code, 79.8K Data, 271.9K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Fixed a memory allocation/free regression introduced in 20140828
that could cause the compiler to crash. This was introduced inadvertently
during the effort to eliminate compiler memory leaks. ACPICA BZ 1111,
1113.

iASL: Removed two error messages that have been found to create false
positives, until they can be fixed and fully validated (ACPICA BZ 1112):
1) Illegal forward reference within a method
2) Illegal reference across two methods

iASL: Implemented a new option (-lm) to create a hardware mapping file
that summarizes all GPIO, I2C, SPI, and UART connections. This option
works for both the compiler and disassembler. See the iASL compiler user
guide for additional information and examples (section 6.4.6).

AcpiDump: Added support for the version 1 (ACPI 1.0) RSDP in addition to
version 2. This corrects the AE_BAD_HEADER exception seen on systems with
a version 1 RSDP. Lv Zheng ACPICA BZ 1097.

AcpiExec: For Unix versions, don't attempt to put STDIN into raw mode
unless STDIN is actually a terminal. Assists with batch-mode processing.
ACPICA BZ 1114.

Disassembler/AcpiHelp: Added another large group of recognized _HID
values.


----------------------------------------
28 August 2014. Summary of changes for version 20140828:

1) ACPICA kernel-resident subsystem:

Fixed a problem related to the internal use of the Timer() operator where
a 64-bit divide could cause an attempted link to a double-precision math
library. This divide is not actually necessary, so the code was
restructured to eliminate it. Lv Zheng.

ACPI 5.1: Added support for the runtime validation of the _DSD package
(similar to the iASL support).

ACPI 5.1/Headers: Added support for the GICC affinity subtable to the
SRAT table. Hanjun Guo <hanjun.guo@linaro.org>.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version:  98.8K Code, 27.3K Data, 126.1K Total
    Debug Version:     192.1K Code, 79.8K Data, 271.9K Total
  Previous Release:
    Non-Debug Version:  98.7K Code, 27.3K Data, 126.0K Total1
    Debug Version:     192.0K Code, 79.7K Data, 271.7K Total

2) iASL Compiler/Disassembler and Tools:

AcpiExec: Fixed a problem on unix systems where the original terminal
state was not always properly restored upon exit. Seen when using the -v
option. ACPICA BZ 1104.

iASL: Fixed a problem with the validation of the ranges/length within the
Memory24 resource descriptor. There was a boundary condition when the
range was equal to the (length -1) caused by the fact that these values
are defined in 256-byte blocks, not bytes. ACPICA BZ 1098

Disassembler: Fixed a problem with the GpioInt descriptor interrupt
polarity
flags. The flags are actually 2 bits, not 1, and the "ActiveBoth" keyword
is
now supported properly.

ACPI 5.1: Added the GICC affinity subtable to the SRAT table. Supported
in the disassembler, data table compiler, and table template generator.

iASL: Added a requirement for Device() objects that one of either a _HID
or _ADR must exist within the scope of a Device, as per the ACPI
specification. Remove a similar requirement that was incorrectly in place
for the _DSD object.

iASL: Added error detection for illegal named references within control
methods that would cause runtime failures. Now trapped as errors are: 1)
References to objects within a non-parent control method. 2) Forward
references (within a method) -- for control methods, AML interpreters use
a one-pass parse of control methods. ACPICA BZ 1008.

iASL: Added error checking for dependencies related to the _PSx power
methods. ACPICA BZ 1029.
1) For _PS0, one of these must exist within the same scope: _PS1, _PS2,
_PS3.
2) For _PS1, _PS2, and PS3: A _PS0 object must exist within the same
scope.

iASL and table compiler: Cleanup miscellaneous memory leaks by fully
deploying the existing object and string caches and adding new caches for
the table compiler.

iASL: Split the huge parser source file into multiple subfiles to improve
manageability. Generation now requires the M4 macro preprocessor, which
is part of the Bison distribution on both unix and windows platforms.

AcpiSrc: Fixed and removed all extraneous warnings generated during
entire ACPICA source code scan and/or conversion.


----------------------------------------

24 July 2014. Summary of changes for version 20140724:

The ACPI 5.1 specification has been released and is available at:
http://uefi.org/specs/access


0) ACPI 5.1 support in ACPICA:

ACPI 5.1 is fully supported in ACPICA as of this release.

New predefined names. Support includes iASL and runtime ACPICA
validation.
    _CCA (Cache Coherency Attribute).
    _DSD (Device-Specific Data). David Box.

Modifications to existing ACPI tables. Support includes headers, iASL
Data Table compiler, disassembler, and the template generator.
    FADT - New fields and flags. Graeme Gregory.
    GTDT - One new subtable and new fields. Tomasz Nowicki.
    MADT - Two new subtables. Tomasz Nowicki.
    PCCT - One new subtable.

Miscellaneous.
    New notification type for System Resource Affinity change events.


1) ACPICA kernel-resident subsystem:

Fixed a regression introduced in 20140627 where a fault can happen during
the deletion of Alias AML namespace objects. The problem affected both
the core ACPICA and the ACPICA tools including iASL and AcpiExec.

Implemented a new GPE public interface, AcpiMarkGpeForWake. Provides a
simple mechanism to enable wake GPEs that have no associated handler or
control method. Rafael Wysocki.

Updated the AcpiEnableGpe interface to disallow the enable if there is no
handler or control method associated with the particular GPE. This will
help avoid meaningless GPEs and even GPE floods. Rafael Wysocki.

Updated GPE handling and dispatch by disabling the GPE before clearing
the status bit for edge-triggered GPEs. Lv Zheng.

Added Timer() support to the AML Debug object. The current timer value is
now displayed with each invocation of (Store to) the debug object to
enable simple generation of execution times for AML code (method
execution for example.) ACPICA BZ 1093.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version:  98.7K Code, 27.3K Data, 126.0K Total
    Debug Version:     192.0K Code, 79.7K Data, 271.7K Total
  Previous Release:
    Non-Debug Version:  98.7K Code, 27.2K Data, 125.9K Total
    Debug Version:     191.7K Code, 79.6K Data, 271.3K Total


2) iASL Compiler/Disassembler and Tools:

Fixed an issue with the recently added local printf implementation,
concerning width/precision specifiers that could cause incorrect output.
Lv Zheng. ACPICA BZ 1094.

Disassembler: Added support to detect buffers that contain UUIDs and
disassemble them to an invocation of the ToUUID operator. Also emit
commented descriptions of known ACPI-related UUIDs.

AcpiHelp: Added support to display known ACPI-related UUIDs. New option,
-u. Adds three new files.

iASL: Update table compiler and disassembler for DMAR table changes that
were introduced in September 2013. With assistance by David Woodhouse.

----------------------------------------
27 June 2014. Summary of changes for version 20140627:

1) ACPICA kernel-resident subsystem:

Formatted Output: Implemented local versions of standard formatted output
utilities such as printf, etc. Over time, it has been discovered that
there are in fact many portability issues with printf, and the addition
of this feature will fix/prevent these issues once and for all. Some
known issues are summarized below:

1) Output of 64-bit values is not portable. For example, UINT64 is %ull
for the Linux kernel and is %uI64 for some MSVC versions.
2) Invoking printf consistently in a manner that is portable across both
32-bit and 64-bit platforms is difficult at best in many situations.
3) The output format for pointers varies from system to system (leading
zeros especially), and leads to inconsistent output from ACPICA across
platforms.
4) Certain platform-specific printf formats may conflict with ACPICA use.
5) If there is no local C library available, ACPICA now has local support
for printf.

-- To address these printf issues in a complete manner, ACPICA now
directly implements a small subset of printf format specifiers, only
those that it requires. Adds a new file, utilities/utprint.c. Lv Zheng.

Implemented support for ACPICA generation within the EFI environment.
Initially, the AcpiDump utility is supported in the UEFI shell
environment. Lv Zheng.

Added a new external interface, AcpiLogError, to improve ACPICA
portability. This allows the host to redirect error messages from the
ACPICA utilities. Lv Zheng.

Added and deployed new OSL file I/O interfaces to improve ACPICA
portability:
  AcpiOsOpenFile
  AcpiOsCloseFile
  AcpiOsReadFile
  AcpiOsWriteFile
  AcpiOsGetFileOffset
  AcpiOsSetFileOffset
There are C library implementations of these functions in the new file
service_layers/oslibcfs.c -- however, the functions can be implemented by
the local host in any way necessary. Lv Zheng.

Implemented a mechanism to disable/enable ACPI table checksum validation
at runtime. This can be useful when loading tables very early during OS
initialization when it may not be possible to map the entire table in
order to compute the checksum. Lv Zheng.

Fixed a buffer allocation issue for the Generic Serial Bus support.
Originally, a fixed buffer length was used. This change allows for
variable-length buffers based upon the protocol indicated by the field
access attributes. Reported by Lan Tianyu. Lv Zheng.

Fixed a problem where an object detached from a namespace node was not
properly terminated/cleared and could cause a circular list problem if
reattached. ACPICA BZ 1063. David Box.

Fixed a possible recursive lock acquisition in hwregs.c. Rakib Mullick.

Fixed a possible memory leak in an error return path within the function
AcpiUtCopyIobjectToIobject. ACPICA BZ 1087. Colin Ian King.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version:  98.7K Code, 27.2K Data, 125.9K Total
    Debug Version:     191.7K Code, 79.6K Data, 271.3K Total
  Previous Release:
    Non-Debug Version:  96.8K Code, 27.2K Data, 124.0K Total
    Debug Version:     189.5K Code, 79.7K Data, 269.2K Total


2) iASL Compiler/Disassembler and Tools:

Disassembler: Add dump of ASCII equivalent text within a comment at the
end of each line of the output for the Buffer() ASL operator.

AcpiDump: Miscellaneous changes:
  Fixed repetitive table dump in -n mode.
  For older EFI platforms, use the ACPI 1.0 GUID during RSDP search if
the ACPI 2.0 GUID fails.

iASL: Fixed a problem where the compiler could fault if incorrectly given
an acpidump output file as input. ACPICA BZ 1088. David Box.

AcpiExec/AcpiNames: Fixed a problem where these utilities could fault if
they are invoked without any arguments.

Debugger: Fixed a possible memory leak in an error return path. ACPICA BZ
1086. Colin Ian King.

Disassembler: Cleaned up a block of code that extracts a parent Op
object. Added a comment that explains that the parent is guaranteed to be
valid in this case. ACPICA BZ 1069.


----------------------------------------
24 April 2014. Summary of changes for version 20140424:

1) ACPICA kernel-resident subsystem:

Implemented support to skip/ignore NULL address entries in the RSDT/XSDT.
Some of these tables are known to contain a trailing NULL entry. Lv
Zheng.

Removed an extraneous error message for the case where there are a large
number of system GPEs (> 124). This was the "32-bit FADT register is too
long to convert to GAS struct" message, which is irrelevant for GPEs
since the GPEx_BLK_LEN fields of the FADT are always used instead of the
(limited capacity) GAS bit length. Also, several changes to ensure proper
support for GPE numbers > 255, where some "GPE number" fields were 8-bits
internally.

Implemented and deployed additional configuration support for the public
ACPICA external interfaces. Entire classes of interfaces can now be
easily modified or configured out, replaced by stubbed inline functions
by default. Lv Zheng.

Moved all public ACPICA runtime configuration globals to the public
ACPICA external interface file for convenience. Also, removed some
obsolete/unused globals. See the file acpixf.h. Lv Zheng.

Documentation: Added a new section to the ACPICA reference describing the
maximum number of GPEs that can be supported by the FADT-defined GPEs in
block zero and one. About 1200 total. See section 4.4.1 of the ACPICA
reference.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version:  96.8K Code, 27.2K Data, 124.0K Total
    Debug Version:     189.5K Code, 79.7K Data, 269.2K Total
  Previous Release:
    Non-Debug Version:  97.0K Code, 27.2K Data, 124.2K Total
    Debug Version:     189.7K Code, 79.5K Data, 269.2K Total


2) iASL Compiler/Disassembler and Tools:

iASL and disassembler: Add full support for the LPIT table (Low Power
Idle Table). Includes support in the disassembler, data table compiler,
and template generator.

AcpiDump utility:
1) Add option to force the use of the RSDT (over the XSDT).
2) Improve validation of the RSDP signature (use 8 chars instead of 4).

iASL: Add check for predefined packages that are too large.  For
predefined names that contain subpackages, check if each subpackage is
too large. (Check for too small already exists.)

Debugger: Updated the GPE command (which simulates a GPE by executing the
GPE code paths in ACPICA). The GPE device is now optional, and defaults
to the GPE 0/1 FADT-defined blocks.

Unix application OSL: Update line-editing support. Add additional error
checking and take care not to reset terminal attributes on exit if they
were never set. This should help guarantee that the terminal is always
left in the previous state on program exit.


----------------------------------------
25 March 2014. Summary of changes for version 20140325:

1) ACPICA kernel-resident subsystem:

Updated the auto-serialize feature for control methods. This feature
automatically serializes all methods that create named objects in order
to prevent runtime errors. The update adds support to ignore the
currently executing AML SyncLevel when invoking such a method, in order
to prevent disruption of any existing SyncLevel priorities that may exist
in the AML code. Although the use of SyncLevels is relatively rare, this
change fixes a regression where an AE_AML_MUTEX_ORDER exception can
appear on some machines starting with the 20140214 release.

Added a new external interface to allow the host to install ACPI tables
very early, before the namespace is even created. AcpiInstallTable gives
the host additional flexibility for ACPI table management. Tables can be
installed directly by the host as if they had originally appeared in the
XSDT/RSDT. Installed tables can be SSDTs or other ACPI data tables
(anything except the DSDT and FACS). Adds a new file, tbdata.c, along
with additional internal restructuring and cleanup. See the ACPICA
Reference for interface details. Lv Zheng.

Added validation of the checksum for all incoming dynamically loaded
tables (via external interfaces or via AML Load/LoadTable operators). Lv
Zheng.

Updated the use of the AcpiOsWaitEventsComplete interface during Notify
and GPE handler removal. Restructured calls to eliminate possible race
conditions. Lv Zheng.

Added a warning for the use/execution of the ASL/AML Unload (table)
operator. This will help detect and identify machines that use this
operator if and when it is ever used. This operator has never been seen
in the field and the usage model and possible side-effects of the drastic
runtime action of a full table removal are unknown.

Reverted the use of #pragma push/pop which was introduced in the 20140214
release. It appears that push and pop are not implemented by enough
compilers to make the use of this feature feasible for ACPICA at this
time. However, these operators may be deployed in a future ACPICA
release.

Added the missing EXPORT_SYMBOL macros for the install and remove SCI
handler interfaces.

Source code generation:
1) Disabled the use of the "strchr" macro for the gcc-specific
generation. For some versions of gcc, this macro can periodically expose
a compiler bug which in turn causes compile-time error(s).
2) Added support for PPC64 compilation. Colin Ian King.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version:  97.0K Code, 27.2K Data, 124.2K Total
    Debug Version:     189.7K Code, 79.5K Data, 269.2K Total
  Previous Release:
    Non-Debug Version:  96.5K Code, 27.2K Data, 123.7K Total
    Debug Version:     188.6K Code, 79.0K Data, 267.6K Total


2) iASL Compiler/Disassembler and Tools:

Disassembler: Added several new features to improve the readability of
the resulting ASL code. Extra information is emitted within comment
fields in the ASL code:
1) Known _HID/_CID values are decoded to descriptive text.
2) Standard values for the Notify() operator are decoded to descriptive
text.
3) Target operands are expanded to full pathnames (in a comment) when
possible.

Disassembler: Miscellaneous updates for extern() handling:
1) Abort compiler if file specified by -fe option does not exist.
2) Silence unnecessary warnings about argument count mismatches.
3) Update warning messages concerning unresolved method externals.
4) Emit "UnknownObj" keyword for externals whose type cannot be
determined.

AcpiHelp utility:
1) Added the -a option to display both the ASL syntax and the AML
encoding for an input ASL operator. This effectively displays all known
information about an ASL operator with one AcpiHelp invocation.
2) Added substring match support (similar to a wildcard) for the -i
(_HID/PNP IDs) option.

iASL/Disassembler: Since this tool does not yet support execution on big-
endian machines, added detection of endianness and an error message if
execution is attempted on big-endian. Support for big-endian within iASL
is a feature that is on the ACPICA to-be-done list.

AcpiBin utility:
1) Remove option to extract binary files from an acpidump; this function
is made obsolete by the AcpiXtract utility.
2) General cleanup of open files and allocated buffers.


----------------------------------------
14 February 2014. Summary of changes for version 20140214:

1) ACPICA kernel-resident subsystem:

Implemented a new mechanism to proactively prevent problems with ill-
behaved reentrant control methods that create named ACPI objects. This
behavior is illegal as per the ACPI specification, but is nonetheless
frequently seen in the field. Previously, this could lead to an
AE_ALREADY_EXISTS exception if the method was actually entered by more
than one thread. This new mechanism detects such methods at table load
time and marks them "serialized" to prevent reentrancy. A new global
option, AcpiGbl_AutoSerializeMethods, has been added to disable this
feature if desired. This mechanism and global option obsoletes and
supersedes the previous AcpiGbl_SerializeAllMethods option.

Added the "Windows 2013" string to the _OSI support. ACPICA will now
respond TRUE to _OSI queries with this string. It is the stated policy of
ACPICA to add new strings to the _OSI support as soon as possible after
they are defined. See the full ACPICA _OSI policy which has been added to
the utilities/utosi.c file.

Hardened/updated the _PRT return value auto-repair code:
1) Do not abort the repair on a single subpackage failure, continue to
check all subpackages.
2) Add check for the minimum subpackage length (4).
3) Properly handle extraneous NULL package elements.

Added support to avoid the possibility of infinite loops when traversing
object linked lists. Never allow an infinite loop, even in the face of
corrupted object lists.

ACPICA headers: Deployed the use of #pragma pack(push) and #pragma
pack(pop) directives to ensure that the ACPICA headers are independent of
compiler settings or other host headers.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version:  96.5K Code, 27.2K Data, 123.7K Total
    Debug Version:     188.6K Code, 79.0K Data, 267.6K Total
  Previous Release:
    Non-Debug Version:  96.2K Code, 27.0K Data, 123.2K Total
    Debug Version:     187.5K Code, 78.3K Data, 265.8K Total


2) iASL Compiler/Disassembler and Tools:

iASL/Table-compiler: Fixed a problem with support for the SPMI table. The
first reserved field was incorrectly forced to have a value of zero. This
change correctly forces the field to have a value of one. ACPICA BZ 1081.

Debugger: Added missing support for the "Extra" and "Data" subobjects
when displaying object data.

Debugger: Added support to display entire object linked lists when
displaying object data.

iASL: Removed the obsolete -g option to obtain ACPI tables from the
Windows registry. This feature has been superseded by the acpidump
utility.


----------------------------------------
14 January 2014. Summary of changes for version 20140114:

1) ACPICA kernel-resident subsystem:

Updated all ACPICA copyrights and signons to 2014. Added the 2014
copyright to all module headers and signons, including the standard Linux
header. This affects virtually every file in the ACPICA core subsystem,
iASL compiler, all ACPICA utilities, and the test suites.

Improved parameter validation for AcpiInstallGpeBlock. Added the
following checks:
1) The incoming device handle refers to type ACPI_TYPE_DEVICE.
2) There is not already a GPE block attached to the device.
Likewise, with AcpiRemoveGpeBlock, ensure that the incoming object is a
device.

Correctly support "references" in the ACPI_OBJECT. This change fixes the
support to allow references (namespace nodes) to be passed as arguments
to control methods via the evaluate object interface. This is probably
most useful for testing purposes, however.

Improved support for 32/64 bit physical addresses in printf()-like
output. This change improves the support for physical addresses in printf
debug statements and other output on both 32-bit and 64-bit hosts. It
consistently outputs the appropriate number of bytes for each host. The
%p specifier is unsatisfactory since it does not emit uniform output on
all hosts/clib implementations (on some, leading zeros are not supported,
leading to difficult-to-read output).

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version:  96.2K Code, 27.0K Data, 123.2K Total
    Debug Version:     187.5K Code, 78.3K Data, 265.8K Total
  Previous Release:
    Non-Debug Version:  96.1K Code, 27.0K Data, 123.1K Total
    Debug Version:     185.6K Code, 77.3K Data, 262.9K Total


2) iASL Compiler/Disassembler and Tools:

iASL: Fix a possible fault when using the Connection() operator. Fixes a
problem if the parent Field definition for the Connection operator refers
to an operation region that does not exist. ACPICA BZ 1064.

AcpiExec: Load of local test tables is now optional. The utility has the
capability to load some various tables to test features of ACPICA.
However, there are enough of them that the output of the utility became
confusing. With this change, only the required local tables are displayed
(RSDP, XSDT, etc.) along with the actual tables loaded via the command
line specification. This makes the default output simler and easier to
understand. The -el command line option restores the original behavior
for testing purposes.

AcpiExec: Added support for overlapping operation regions. This change
expands the simulation of operation regions by supporting regions that
overlap within the given address space. Supports SystemMemory and
SystemIO. ASLTS test suite updated also. David Box. ACPICA BZ 1031.

AcpiExec: Added region handler support for PCI_Config and EC spaces. This
allows AcpiExec to simulate these address spaces, similar to the current
support for SystemMemory and SystemIO.

Debugger: Added new command to read/write/compare all namespace objects.
The command "test objects" will exercise the entire namespace by writing
new values to each data object, and ensuring that the write was
successful. The original value is then restored and verified.

Debugger: Added the "test predefined" command. This change makes this
test public and puts it under the new "test" command. The test executes
each and every predefined name within the current namespace.


----------------------------------------
18 December 2013. Summary of changes for version 20131218:

Global note: The ACPI 5.0A specification was released this month. There
are no changes needed for ACPICA since this release of ACPI is an
errata/clarification release. The specification is available at
acpi.info.


1) ACPICA kernel-resident subsystem:

Added validation of the XSDT root table if it is present. Some older
platforms contain an XSDT that is ill-formed or otherwise invalid (such
as containing some or all entries that are NULL pointers). This change
adds a new function to validate the XSDT before actually using it. If the
XSDT is found to be invalid, ACPICA will now automatically fall back to
using the RSDT instead. Original implementation by Zhao Yakui. Ported to
ACPICA and enhanced by Lv Zheng and Bob Moore.

Added a runtime option to ignore the XSDT and force the use of the RSDT.
This change adds a runtime option that will force ACPICA to use the RSDT
instead of the XSDT (AcpiGbl_DoNotUseXsdt). Although the ACPI spec
requires that an XSDT be used instead of the RSDT, the XSDT has been
found to be corrupt or ill-formed on some machines. Lv Zheng.

Added a runtime option to favor 32-bit FADT register addresses over the
64-bit addresses. This change adds an option to favor 32-bit FADT
addresses when there is a conflict between the 32-bit and 64-bit versions
of the same register. The default behavior is to use the 64-bit version
in accordance with the ACPI specification. This can now be overridden via
the AcpiGbl_Use32BitFadtAddresses flag. ACPICA BZ 885. Lv Zheng.

During the change above, the internal "Convert FADT" and "Verify FADT"
functions have been merged to simplify the code, making it easier to
understand and maintain. ACPICA BZ 933.

Improve exception reporting and handling for GPE block installation.
Return an actual status from AcpiEvGetGpeXruptBlock and don't clobber the
status when exiting AcpiEvInstallGpeBlock. ACPICA BZ 1019.

Added helper macros to extract bus/segment numbers from the HEST table.
This change adds two macros to extract the encoded bus and segment
numbers from the HEST Bus field - ACPI_HEST_BUS and ACPI_HEST_SEGMENT.
Betty Dall <betty.dall@hp.com>

Removed the unused ACPI_FREE_BUFFER macro. This macro is no longer used
by ACPICA. It is not a public macro, so it should have no effect on
existing OSV code. Lv Zheng.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version:  96.1K Code, 27.0K Data, 123.1K Total
    Debug Version:     185.6K Code, 77.3K Data, 262.9K Total
  Previous Release:
    Non-Debug Version:  95.9K Code, 27.0K Data, 122.9K Total
    Debug Version:     185.1K Code, 77.2K Data, 262.3K Total


2) iASL Compiler/Disassembler and Tools:

Disassembler: Improved pathname support for emitted External()
statements. This change adds full pathname support for external names
that have been resolved internally by the inclusion of additional ACPI
tables (via the iASL -e option). Without this change, the disassembler
can emit multiple externals for the same object, or it become confused
when the Scope() operator is used on an external object. Overall, greatly
improves the ability to actually recompile the emitted ASL code when
objects a referenced across multiple ACPI tables. Reported by Michael
Tsirkin (mst@redhat.com).

Tests/ASLTS: Updated functional control suite to execute with no errors.
David Box. Fixed several errors related to the testing of the interpreter
slack mode. Lv Zheng.

iASL: Added support to detect names that are declared within a control
method, but are unused (these are temporary names that are only valid
during the time the method is executing). A remark is issued for these
cases. ACPICA BZ 1022.

iASL: Added full support for the DBG2 table. Adds full disassembler,
table compiler, and template generator support for the DBG2 table (Debug
Port 2 table).

iASL: Added full support for the PCCT table, update the table definition.
Updates the PCCT table definition in the actbl3.h header and adds table
compiler and template generator support.

iASL: Added an option to emit only error messages (no warnings/remarks).
The -ve option will enable only error messages, warnings and remarks are
suppressed. This can simplify debugging when only the errors are
important, such as when an ACPI table is disassembled and there are many
warnings and remarks -- but only the actual errors are of real interest.

Example ACPICA code (source/tools/examples): Updated the example code so
that it builds to an actual working program, not just example code. Added
ACPI tables and execution of an example control method in the DSDT. Added
makefile support for Unix generation.


----------------------------------------
15 November 2013. Summary of changes for version 20131115:

This release is available at https://acpica.org/downloads


1) ACPICA kernel-resident subsystem:

Resource Manager: Fixed loop termination for the "get AML length"
function. The loop previously had an error termination on a NULL resource
pointer, which can never happen since the loop simply increments a valid
resource pointer. This fix changes the loop to terminate with an error on
an invalid end-of-buffer condition. The problem can be seen as an
infinite loop by callers to AcpiSetCurrentResources with an invalid or
corrupted resource descriptor, or a resource descriptor that is missing
an END_TAG descriptor. Reported by Dan Carpenter
<dan.carpenter@oracle.com>. Lv Zheng, Bob Moore.

Table unload and ACPICA termination: Delete all attached data objects
during namespace node deletion. This fix updates namespace node deletion
to delete the entire list of attached objects (attached via
AcpiAttachObject) instead of just one of the attached items. ACPICA BZ
1024. Tomasz Nowicki (tomasz.nowicki@linaro.org).

ACPICA termination: Added support to delete all objects attached to the
root namespace node. This fix deletes any and all objects that have been
attached to the root node via AcpiAttachData. Previously, none of these
objects were deleted. Reported by Tomasz Nowicki. ACPICA BZ 1026.

Debug output: Do not emit the function nesting level for the in-kernel
build. The nesting level is really only useful during a single-thread
execution. Therefore, only enable this output for the AcpiExec utility.
Also, only emit the thread ID when executing under AcpiExec (Context
switches are still always detected and a message is emitted). ACPICA BZ
972.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version:  95.9K Code, 27.0K Data, 122.9K Total
    Debug Version:     185.1K Code, 77.2K Data, 262.3K Total
  Previous Release:
    Non-Debug Version:  95.8K Code, 27.0K Data, 122.8K Total
    Debug Version:     185.2K Code, 77.2K Data, 262.4K Total


2) iASL Compiler/Disassembler and Tools:

AcpiExec/Unix-OSL: Use <termios.h> instead of <termio.h>. This is the
correct portable POSIX header for terminal control functions.

Disassembler: Fixed control method invocation issues related to the use
of the CondRefOf() operator. The problem is seen in the disassembly where
control method invocations may not be disassembled properly if the
control method name has been used previously as an argument to CondRefOf.
The solution is to not attempt to emit an external declaration for the
CondRefOf target (it is not necessary in the first place). This prevents
disassembler object type confusion. ACPICA BZ 988.

Unix Makefiles: Added an option to disable compiler optimizations and the
_FORTIFY_SOURCE flag. Some older compilers have problems compiling ACPICA
with optimizations (reportedly, gcc 4.4 for example). This change adds a
command line option for make (NOOPT) that disables all compiler
optimizations and the _FORTIFY_SOURCE compiler flag. The default
optimization is -O2 with the _FORTIFY_SOURCE flag specified. ACPICA BZ
1034. Lv Zheng, Bob Moore.

Tests/ASLTS: Added options to specify individual test cases and modes.
This allows testers running aslts.sh to optionally specify individual
test modes and test cases. Also added an option to disable the forced
generation of the ACPICA tools from source if desired. Lv Zheng.

----------------------------------------
27 September 2013. Summary of changes for version 20130927:

This release is available at https://acpica.org/downloads


1) ACPICA kernel-resident subsystem:

Fixed a problem with store operations to reference objects. This change
fixes a problem where a Store operation to an ArgX object that contained
a
reference to a field object did not complete the automatic dereference
and
then write to the actual field object. Instead, the object type of the
field object was inadvertently changed to match the type of the source
operand. The new behavior will actually write to the field object (buffer
field or field unit), thus matching the correct ACPI-defined behavior.

Implemented support to allow the host to redefine individual OSL
prototypes. This change enables the host to redefine OSL prototypes found
in the acpiosxf.h file. This allows the host to implement OSL interfaces
with a macro or inlined function. Further, it allows the host to add any
additional required modifiers such as __iomem, __init, __exit, etc., as
necessary on a per-interface basis. Enables maximum flexibility for the
OSL interfaces. Lv Zheng.

Hardcoded the access width for the FADT-defined reset register. The ACPI
specification requires the reset register width to be 8 bits. ACPICA now
hardcodes the width to 8 and ignores the FADT width value. This provides
compatibility with other ACPI implementations that have allowed BIOS code
with bad register width values to go unnoticed. Matthew Garett, Bob
Moore,
Lv Zheng.

Changed the position/use of the ACPI_PRINTF_LIKE macro. This macro is
used
in the OSL header (acpiosxf). The change modifies the position of this
macro in each instance where it is used (AcpiDebugPrint, etc.) to avoid
build issues if the OSL defines the implementation of the interface to be
an inline stub function. Lv Zheng.

Deployed a new macro ACPI_EXPORT_SYMBOL_INIT for the main ACPICA
initialization interfaces. This change adds a new macro for the main init
and terminate external interfaces in order to support hosts that require
additional or different processing for these functions. Changed from
ACPI_EXPORT_SYMBOL to ACPI_EXPORT_SYMBOL_INIT for these functions. Lv
Zheng, Bob Moore.

Cleaned up the memory allocation macros for configurability. In the
common
case, the ACPI_ALLOCATE and related macros now resolve directly to their
respective AcpiOs* OSL interfaces. Two options:
1) The ACPI_ALLOCATE_ZEROED macro uses a simple local implementation by
default, unless overridden by the USE_NATIVE_ALLOCATE_ZEROED define.
2) For AcpiExec (and for debugging), the macros can optionally be
resolved
to the local ACPICA interfaces that track each allocation (local tracking
is used to immediately detect memory leaks).
Lv Zheng.

Simplified the configuration for ACPI_REDUCED_HARDWARE. Allows the kernel
to predefine this macro to either TRUE or FALSE during the system build.

Replaced __FUNCTION_ with __func__ in the gcc-specific header.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version:  95.8K Code, 27.0K Data, 122.8K Total
    Debug Version:     185.2K Code, 77.2K Data, 262.4K Total
  Previous Release:
    Non-Debug Version:  96.7K Code, 27.1K Data, 123.9K Total
    Debug Version:     184.4K Code, 76.8K Data, 261.2K Total


2) iASL Compiler/Disassembler and Tools:

iASL: Implemented wildcard support for the -e option. This simplifies use
when there are many SSDTs that must be included to resolve external
method
declarations. ACPICA BZ 1041. Example:
    iasl -e ssdt*.dat -d dsdt.dat

AcpiExec: Add history/line-editing for Unix/Linux systems. This change
adds a portable module that implements full history and limited line
editing for Unix and Linux systems. It does not use readline() due to
portability issues. Instead it uses the POSIX termio interface to put the
terminal in raw input mode so that the various special keys can be
trapped
(such as up/down-arrow for history support and left/right-arrow for line
editing). Uses the existing debugger history mechanism. ACPICA BZ 1036.

AcpiXtract: Add support to handle (ignore) "empty" lines containing only
one or more spaces. This provides compatible with early or different
versions of the AcpiDump utility. ACPICA BZ 1044.

AcpiDump: Do not ignore tables that contain only an ACPI table header.
Apparently, some BIOSs create SSDTs that contain an ACPI table header but
no other data. This change adds support to dump these tables. Any tables
shorter than the length of an ACPI table header remain in error (an error
message is emitted). Reported by Yi Li.

Debugger: Echo actual command along with the "unknown command" message.

----------------------------------------
23 August 2013. Summary of changes for version 20130823:

1) ACPICA kernel-resident subsystem:

Implemented support for host-installed System Control Interrupt (SCI)
handlers. Certain ACPI functionality requires the host to handle raw
SCIs. For example, the "SCI Doorbell" that is defined for memory power
state support requires the host device driver to handle SCIs to examine
if the doorbell has been activated. Multiple SCI handlers can be
installed to allow for future expansion. New external interfaces are
AcpiInstallSciHandler, AcpiRemoveSciHandler; see the ACPICA reference for
details. Lv Zheng, Bob Moore. ACPICA BZ 1032.

Operation region support: Never locally free the handler "context"
pointer. This change removes some dangerous code that attempts to free
the handler context pointer in some (rare) circumstances. The owner of
the handler owns this pointer and the ACPICA code should never touch it.
Although not seen to be an issue in any kernel, it did show up as a
problem (fault) under AcpiExec. Also, set the internal storage field for
the context pointer to zero when the region is deactivated, simply for
sanity. David Box. ACPICA BZ 1039.

AcpiRead: On error, do not modify the return value target location. If an
error happens in the middle of a split 32/32 64-bit I/O operation, do not
modify the target of the return value pointer. Makes the code consistent
with the rest of ACPICA. Bjorn Helgaas.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version:  96.7K Code, 27.1K Data, 123.9K Total
    Debug Version:     184.4K Code, 76.8K Data, 261.2K Total
  Previous Release:
    Non-Debug Version:  96.2K Code, 27.1K Data, 123.3K Total
    Debug Version:     185.4K Code, 77.1K Data, 262.5K Total


2) iASL Compiler/Disassembler and Tools:

AcpiDump: Implemented several new features and fixed some problems:
1) Added support to dump the RSDP, RSDT, and XSDT tables.
2) Added support for multiple table instances (SSDT, UEFI).
3) Added option to dump "customized" (overridden) tables (-c).
4) Fixed a problem where some table filenames were improperly
constructed.
5) Improved some error messages, removed some unnecessary messages.

iASL: Implemented additional support for disassembly of ACPI tables that
contain invocations of external control methods. The -fe<file> option
allows the import of a file that specifies the external methods along
with the required number of arguments for each -- allowing for the
correct disassembly of the table. This is a workaround for a limitation
of AML code where the disassembler often cannot determine the number of
arguments required for an external control method and generates incorrect
ASL code. See the iASL reference for details. ACPICA BZ 1030.

Debugger: Implemented a new command (paths) that displays the full
pathnames (namepaths) and object types of all objects in the namespace.
This is an alternative to the namespace command.

Debugger: Implemented a new command (sci) that invokes the SCI dispatch
mechanism and any installed handlers.

iASL: Fixed a possible segfault for "too many parent prefixes" condition.
This can occur if there are too many parent prefixes in a namepath (for
example, ^^^^^^PCI0.ECRD). ACPICA BZ 1035.

Application OSLs: Set the return value for the PCI read functions. These
functions simply return AE_OK, but should set the return value to zero
also. This change implements this. ACPICA BZ 1038.

Debugger: Prevent possible command line buffer overflow. Increase the
size of a couple of the debugger line buffers, and ensure that overflow
cannot happen. ACPICA BZ 1037.

iASL: Changed to abort immediately on serious errors during the parsing
phase. Due to the nature of ASL, there is no point in attempting to
compile these types of errors, and they typically end up causing a
cascade of hundreds of errors which obscure the original problem.

----------------------------------------
25 July 2013. Summary of changes for version 20130725:

1) ACPICA kernel-resident subsystem:

Fixed a problem with the DerefOf operator where references to FieldUnits
and BufferFields incorrectly returned the parent object, not the actual
value of the object. After this change, a dereference of a FieldUnit
reference results in a read operation on the field to get the value, and
likewise, the appropriate BufferField value is extracted from the target
buffer.

Fixed a problem where the _WAK method could cause a fault under these
circumstances: 1) Interpreter slack mode was not enabled, and 2) the _WAK
method returned no value. The problem is rarely seen because most kernels
run ACPICA in slack mode.

For the DerefOf operator, a fatal error now results if an attempt is made
to dereference a reference (created by the Index operator) to a NULL
package element. Provides compatibility with other ACPI implementations,
and this behavior will be added to a future version of the ACPI
specification.

The ACPI Power Management Timer (defined in the FADT) is now optional.
This provides compatibility with other ACPI implementations and will
appear in the next version of the ACPI specification. If there is no PM
Timer on the platform, AcpiGetTimer returns AE_SUPPORT. An address of
zero in the FADT indicates no PM timer.

Implemented a new interface for _OSI support, AcpiUpdateInterfaces. This
allows the host to globally enable/disable all vendor strings, all
feature strings, or both. Intended to be primarily used for debugging
purposes only. Lv Zheng.

Expose the collected _OSI data to the host via a global variable. This
data tracks the highest level vendor ID that has been invoked by the BIOS
so that the host (and potentially ACPICA itself) can change behaviors
based upon the age of the BIOS.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version:  96.2K Code, 27.1K Data, 123.3K Total
    Debug Version:     184.4K Code, 76.8K Data, 261.2K Total
  Previous Release:
    Non-Debug Version:  95.9K Code, 26.9K Data, 122.8K Total
    Debug Version:     184.1K Code, 76.7K Data, 260.8K Total


2) iASL Compiler/Disassembler and Tools:

iASL: Created the following enhancements for the -so option (create
offset table):
1)Add offsets for the last nameseg in each namepath for every supported
object type
2)Add support for Processor, Device, Thermal Zone, and Scope objects
3)Add the actual AML opcode for the parent object of every supported
object type
4)Add support for the ZERO/ONE/ONES AML opcodes for integer objects

Disassembler: Emit all unresolved external symbols in a single block.
These are external references to control methods that could not be
resolved, and thus, the disassembler had to make a guess at the number of
arguments to parse.

iASL: The argument to the -T option (create table template) is now
optional. If not specified, the default table is a DSDT, typically the
most common case.

----------------------------------------
26 June 2013. Summary of changes for version 20130626:

1) ACPICA kernel-resident subsystem:

Fixed an issue with runtime repair of the _CST object. Null or invalid
elements were not always removed properly. Lv Zheng.

Removed an arbitrary restriction of 256 GPEs per GPE block (such as the
FADT-defined GPE0 and GPE1). For GPE0, GPE1, and each GPE Block Device,
the maximum number of GPEs is 1016. Use of multiple GPE block devices
makes the system-wide number of GPEs essentially unlimited.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version:  95.9K Code, 26.9K Data, 122.8K Total
    Debug Version:     184.1K Code, 76.7K Data, 260.8K Total
  Previous Release:
    Non-Debug Version:  96.0K Code, 27.0K Data, 123.0K Total
    Debug Version:     184.1K Code, 76.8K Data, 260.9K Total


2) iASL Compiler/Disassembler and Tools:

Portable AcpiDump: Implemented full support for the Linux and FreeBSD
hosts. Now supports Linux, FreeBSD, and Windows.

Disassembler: Added some missing types for the HEST and EINJ tables: "Set
Error Type With Address", "CMCI", "MCE", and "Flush Cacheline".

iASL/Preprocessor: Implemented full support for nested
#if/#else/#elif/#endif blocks. Allows arbitrary depth of nested blocks.

Disassembler: Expanded maximum output string length to 64K. Was 256 bytes
max. The original purpose of this constraint was to limit the amount of
debug output. However, the string function in question (UtPrintString) is
now used for the disassembler also, where 256 bytes is insufficient.
Reported by RehabMan@GitHub.

iASL/DataTables: Fixed some problems and issues with compilation of DMAR
tables. ACPICA BZ 999. Lv Zheng.

iASL: Fixed a couple of error exit issues that could result in a "Could
not delete <file>" message during ASL compilation.

AcpiDump: Allow "FADT" and "MADT" as valid table signatures, even though
the actual signatures for these tables are "FACP" and "APIC",
respectively.

AcpiDump: Added support for multiple UEFI tables. Only SSDT and UEFI
tables are allowed to have multiple instances.

----------------------------------------
17 May 2013. Summary of changes for version 20130517:

1) ACPICA kernel-resident subsystem:

Fixed a regression introduced in version 20130328 for _INI methods. This
change fixes a problem introduced in 20130328 where _INI methods are no
longer executed properly because of a memory block that was not
initialized correctly. ACPICA BZ 1016. Tomasz Nowicki
<tomasz.nowicki@linaro.org>.

Fixed a possible problem with the new extended sleep registers in the
ACPI
5.0 FADT. Do not use these registers (even if populated) unless the HW-
reduced bit is set in the FADT (as per the ACPI specification). ACPICA BZ
1020. Lv Zheng.

Implemented return value repair code for _CST predefined objects: Sort
the
list and detect/remove invalid entries. ACPICA BZ 890. Lv Zheng.

Implemented a debug-only option to disable loading of SSDTs from the
RSDT/XSDT during ACPICA initialization. This can be useful for debugging
ACPI problems on some machines. Set AcpiGbl_DisableSsdtTableLoad in
acglobal.h - ACPICA BZ 1005. Lv Zheng.

Fixed some issues in the ACPICA initialization and termination code:
Tomasz Nowicki <tomasz.nowicki@linaro.org>
1) Clear events initialized flag upon event component termination. ACPICA
BZ 1013.
2) Fixed a possible memory leak in GPE init error path. ACPICA BZ 1018.
3) Delete global lock pending lock during termination. ACPICA BZ 1012.
4) Clear debug buffer global on termination to prevent possible multiple
delete. ACPICA BZ 1010.

Standardized all switch() blocks across the entire source base. After
many
years, different formatting for switch() had crept in. This change makes
the formatting of every switch block identical. ACPICA BZ 997. Chao Guan.

Split some files to enhance ACPICA modularity and configurability:
1) Split buffer dump routines into utilities/utbuffer.c
2) Split internal error message routines into utilities/uterror.c
3) Split table print utilities into tables/tbprint.c
4) Split iASL command-line option processing into asloptions.c

Makefile enhancements:
1) Support for all new files above.
2) Abort make on errors from any subcomponent. Chao Guan.
3) Add build support for Apple Mac OS X. Liang Qi.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version:  96.0K Code, 27.0K Data, 123.0K Total
    Debug Version:     184.1K Code, 76.8K Data, 260.9K Total
  Previous Release:
    Non-Debug Version:  95.6K Code, 26.8K Data, 122.4K Total
    Debug Version:     183.5K Code, 76.6K Data, 260.1K Total


2) iASL Compiler/Disassembler and Tools:

New utility: Implemented an easily portable version of the acpidump
utility to extract ACPI tables from the system (or a file) in an ASCII
hex
dump format. The top-level code implements the various command line
options, file I/O, and table dump routines. To port to a new host, only
three functions need to be implemented to get tables -- since this
functionality is OS-dependent. See the tools/acpidump/apmain.c module and
the ACPICA reference for porting instructions. ACPICA BZ 859. Notes:
1) The Windows version obtains the ACPI tables from the Registry.
2) The Linux version is under development.
3) Other hosts - If an OS-dependent module is submitted, it will be
distributed with ACPICA.

iASL: Fixed a regression for -D preprocessor option (define symbol). A
restructuring/change to the initialization sequence caused this option to
no longer work properly.

iASL: Implemented a mechanism to disable specific warnings and remarks.
Adds a new command line option, "-vw <messageid> as well as "#pragma
disable <messageid>". ACPICA BZ 989. Chao Guan, Bob Moore.

iASL: Fix for too-strict package object validation. The package object
validation for return values from the predefined names is a bit too
strict, it does not allow names references within the package (which will
be resolved at runtime.) These types of references cannot be validated at
compile time. This change ignores named references within package objects
for names that return or define static packages.

Debugger: Fixed the 80-character command line limitation for the History
command. Now allows lines of arbitrary length. ACPICA BZ 1000. Chao Guan.

iASL: Added control method and package support for the -so option
(generates AML offset table for BIOS support.)

iASL: issue a remark if a non-serialized method creates named objects. If
a thread blocks within the method for any reason, and another thread
enters the method, the method will fail because an attempt will be made
to
create the same (named) object twice. In this case, issue a remark that
the method should be marked serialized. NOTE: may become a warning later.
ACPICA BZ 909.

----------------------------------------
18 April 2013. Summary of changes for version 20130418:

1) ACPICA kernel-resident subsystem:

Fixed a possible buffer overrun during some rare but specific field unit
read operations. This overrun can only happen if the DSDT version is 1 --
meaning that all AML integers are 32 bits -- and the field length is
between 33 and 55 bits long. During the read, an internal buffer object
is
created for the field unit because the field is larger than an integer
(32
bits). However, in this case, the buffer will be incorrectly written
beyond the end because the buffer length is less than the internal
minimum
of 64 bits (8 bytes) long. The buffer will be either 5, 6, or 7 bytes
long, but a full 8 bytes will be written.

Updated the Embedded Controller "orphan" _REG method support. This refers
to _REG methods under the EC device that have no corresponding operation
region. This is allowed by the ACPI specification. This update removes a
dependency on the existence an ECDT table. It will execute an orphan _REG
method as long as the operation region handler for the EC is installed at
the EC device node and not the namespace root. Rui Zhang (original
update), Bob Moore (update/integrate).

Implemented run-time argument typechecking for all predefined ACPI names
(_STA, _BIF, etc.) This change performs object typechecking on all
incoming arguments for all predefined names executed via
AcpiEvaluateObject. This ensures that ACPI-related device drivers are
passing correct object types as well as the correct number of arguments
(therefore identifying any issues immediately). Also, the ASL/namespace
definition of the predefined name is checked against the ACPI
specification for the proper argument count. Adds one new file,
nsarguments.c

Changed an exception code for the ASL UnLoad() operator. Changed the
exception code for the case where the input DdbHandle is invalid, from
AE_BAD_PARAMETER to the more appropriate AE_AML_OPERAND_TYPE.

Unix/Linux makefiles: Removed the use of the -O2 optimization flag in the
global makefile. The use of this flag causes compiler errors on earlier
versions of GCC, so it has been removed for compatibility.

Miscellaneous cleanup:
1) Removed some unused/obsolete macros
2) Fixed a possible memory leak in the _OSI support
3) Removed an unused variable in the predefined name support
4) Windows OSL: remove obsolete reference to a memory list field

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Current Release:
    Non-Debug Version:  95.2K Code, 26.4K Data, 121.6K Total
    Debug Version:     183.0K Code, 76.0K Data, 259.0K Total
  Previous Release:
    Non-Debug Version:  95.6K Code, 26.8K Data, 122.4K Total
    Debug Version:     183.5K Code, 76.6K Data, 260.1K Total


2) iASL Compiler/Disassembler and Tools:

AcpiExec: Added installation of a handler for the SystemCMOS address
space. This prevents control method abort if a method accesses this
space.

AcpiExec: Added support for multiple EC devices, and now install EC
operation region handler(s) at the actual EC device instead of the
namespace root. This reflects the typical behavior of host operating
systems.

AcpiExec: Updated to ensure that all operation region handlers are
installed before the _REG methods are executed. This prevents a _REG
method from aborting if it accesses an address space has no handler.
AcpiExec installs a handler for every possible address space.

Debugger: Enhanced the "handlers" command to display non-root handlers.
This change enhances the handlers command to display handlers associated
with individual devices throughout the namespace, in addition to the
currently supported display of handlers associated with the root
namespace
node.

ASL Test Suite: Several test suite errors have been identified and
resolved, reducing the total error count during execution. Chao Guan.

----------------------------------------
28 March 2013. Summary of changes for version 20130328:

1) ACPICA kernel-resident subsystem:

Fixed several possible race conditions with the internal object reference
counting mechanism. Some of the external ACPICA interfaces update object
reference counts without holding the interpreter or namespace lock. This
change adds a spinlock to protect reference count updates on the internal
ACPICA objects. Reported by and with assistance from Andriy Gapon
(avg@FreeBSD.org).

FADT support: Removed an extraneous warning for very large GPE register
sets. This change removes a size mismatch warning if the legacy length
field for a GPE register set is larger than the 64-bit GAS structure can
accommodate. GPE register sets can be larger than the 255-bit width
limitation of the GAS structure. Linn Crosetto (linn@hp.com).

_OSI Support: handle any errors from AcpiOsAcquireMutex. Check for error
return from this interface. Handles a possible timeout case if
ACPI_WAIT_FOREVER is modified by the host to be a value less than
"forever". Jung-uk Kim.

Predefined name support: Add allowed/required argument type information
to
the master predefined info table. This change adds the infrastructure to
enable typechecking on incoming arguments for all predefined
methods/objects. It does not actually contain the code that will fully
utilize this information, this is still under development. Also condenses
some duplicate code for the predefined names into a new module,
utilities/utpredef.c

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Previous Release:
    Non-Debug Version:  95.0K Code, 25.9K Data, 120.9K Total
    Debug Version:     182.9K Code, 75.6K Data, 258.5K Total
  Current Release:
    Non-Debug Version:  95.2K Code, 26.4K Data, 121.6K Total
    Debug Version:     183.0K Code, 76.0K Data, 259.0K Total


2) iASL Compiler/Disassembler and Tools:

iASL: Implemented a new option to simplify the development of ACPI-
related
BIOS code. Adds support for a new "offset table" output file. The -so
option will create a C table containing the AML table offsets of various
named objects in the namespace so that BIOS code can modify them easily
at
boot time. This can simplify BIOS runtime code by eliminating expensive
searches for "magic values", enhancing boot times and adding greater
reliability. With assistance from Lee Hamel.

iASL: Allow additional predefined names to return zero-length packages.
Now, all predefined names that are defined by the ACPI specification to
return a "variable-length package of packages" are allowed to return a
zero length top-level package. This allows the BIOS to tell the host that
the requested feature is not supported, and supports existing BIOS/ASL
code and practices.

iASL: Changed the "result not used" warning to an error. This is the case
where an ASL operator is effectively a NOOP because the result of the
operation is not stored anywhere. For example:
    Add (4, Local0)
There is no target (missing 3rd argument), nor is the function return
value used. This is potentially a very serious problem -- since the code
was probably intended to do something, but for whatever reason, the value
was not stored. Therefore, this issue has been upgraded from a warning to
an error.

AcpiHelp: Added allowable/required argument types to the predefined names
info display. This feature utilizes the recent update to the predefined
names table (above).

----------------------------------------
14 February 2013. Summary of changes for version 20130214:

1) ACPICA Kernel-resident Subsystem:

Fixed a possible regression on some hosts: Reinstated the safe return
macros (return_ACPI_STATUS, etc.) that ensure that the argument is
evaluated only once. Although these macros are not needed for the ACPICA
code itself, they are often used by ACPI-related host device drivers
where
the safe feature may be necessary.

Fixed several issues related to the ACPI 5.0 reduced hardware support
(SOC): Now ensure that if the platform declares itself as hardware-
reduced
via the FADT, the following functions become NOOPs (and always return
AE_OK) because ACPI is always enabled by definition on these machines:
  AcpiEnable
  AcpiDisable
  AcpiHwGetMode
  AcpiHwSetMode

Dynamic Object Repair: Implemented additional runtime repairs for
predefined name return values. Both of these repairs can simplify code in
the related device drivers that invoke these methods:
1) For the _STR and _MLS names, automatically repair/convert an ASCII
string to a Unicode buffer.
2) For the _CRS, _PRS, and _DMA names, return a resource descriptor with
a
lone end tag descriptor in the following cases: A Return(0) was executed,
a null buffer was returned, or no object at all was returned (non-slack
mode only). Adds a new file, nsconvert.c
ACPICA BZ 998. Bob Moore, Lv Zheng.

Resource Manager: Added additional code to prevent possible infinite
loops
while traversing corrupted or ill-formed resource template buffers. Check
for zero-length resource descriptors in all code that loops through
resource templates (the length field is used to index through the
template). This change also hardens the external AcpiWalkResources and
AcpiWalkResourceBuffer interfaces.

Local Cache Manager: Enhanced the main data structure to eliminate an
unnecessary mechanism to access the next object in the list. Actually
provides a small performance enhancement for hosts that use the local
ACPICA cache manager. Jung-uk Kim.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Previous Release:
    Non-Debug Version:  94.5K Code, 25.4K Data, 119.9K Total
    Debug Version:     182.3K Code, 75.0K Data, 257.3K Total
  Current Release:
    Non-Debug Version:  95.0K Code, 25.9K Data, 120.9K Total
    Debug Version:     182.9K Code, 75.6K Data, 258.5K Total


2) iASL Compiler/Disassembler and Tools:

iASL/Disassembler: Fixed several issues with the definition of the ACPI
5.0 RASF table (RAS Feature Table). This change incorporates late changes
that were made to the ACPI 5.0 specification.

iASL/Disassembler: Added full support for the following new ACPI tables:
  1) The MTMR table (MID Timer Table)
  2) The VRTC table (Virtual Real Time Clock Table).
Includes header file, disassembler, table compiler, and template support
for both tables.

iASL: Implemented compile-time validation of package objects returned by
predefined names. This new feature validates static package objects
returned by the various predefined names defined to return packages. Both
object types and package lengths are validated, for both parent packages
and sub-packages, if any. The code is similar in structure and behavior
to
the runtime repair mechanism within the AML interpreter and uses the
existing predefined name information table. Adds a new file, aslprepkg.c.
ACPICA BZ 938.

iASL: Implemented auto-detection of binary ACPI tables for disassembly.
This feature detects a binary file with a valid ACPI table header and
invokes the disassembler automatically. Eliminates the need to
specifically invoke the disassembler with the -d option. ACPICA BZ 862.

iASL/Disassembler: Added several warnings for the case where there are
unresolved control methods during the disassembly. This can potentially
cause errors when the output file is compiled, because the disassembler
assumes zero method arguments in these cases (it cannot determine the
actual number of arguments without resolution/definition of the method).

Debugger: Added support to display all resources with a single command.
Invocation of the resources command with no arguments will now display
all
resources within the current namespace.

AcpiHelp: Added descriptive text for each ACPICA exception code displayed
via the -e option.

----------------------------------------
17 January 2013. Summary of changes for version 20130117:

1) ACPICA Kernel-resident Subsystem:

Updated the AcpiGetSleepTypeData interface: Allow the \_Sx methods to
return either 1 or 2 integers. Although the ACPI spec defines the \_Sx
objects to return a package containing one integer, most BIOS code
returns
two integers and the previous code reflects that. However, we also need
to
support BIOS code that actually implements to the ACPI spec, and this
change reflects this.

Fixed two issues with the ACPI_DEBUG_PRINT macros:
1) Added the ACPI_DO_WHILE macro to the main DEBUG_PRINT helper macro for
C compilers that require this support.
2) Renamed the internal ACPI_DEBUG macro to ACPI_DO_DEBUG_PRINT since
ACPI_DEBUG is already used by many of the various hosts.

Updated all ACPICA copyrights and signons to 2013. Added the 2013
copyright to all module headers and signons, including the standard Linux
header. This affects virtually every file in the ACPICA core subsystem,
iASL compiler, all ACPICA utilities, and the test suites.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Previous Release:
    Non-Debug Version:  94.5K Code, 25.5K Data, 120.0K Total
    Debug Version:     182.2K Code, 74.9K Data, 257.1K Total
  Current Release:
    Non-Debug Version:  94.5K Code, 25.4K Data, 119.9K Total
    Debug Version:     182.3K Code, 75.0K Data, 257.3K Total


2) iASL Compiler/Disassembler and Tools:

Generic Unix OSL: Use a buffer to eliminate multiple vfprintf()s and
prevent a possible fault on some hosts. Some C libraries modify the arg
pointer parameter to vfprintf making it difficult to call it twice in the
AcpiOsVprintf function. Use a local buffer to workaround this issue. This
does not affect the Windows OSL since the Win C library does not modify
the arg pointer. Chao Guan, Bob Moore.

iASL: Fixed a possible infinite loop when the maximum error count is
reached. If an output file other than the .AML file is specified (such as
a listing file), and the maximum number of errors is reached, do not
attempt to flush data to the output file(s) as the compiler is aborting.
This can cause an infinite loop as the max error count code essentially
keeps calling itself.

iASL/Disassembler: Added an option (-in) to ignore NOOP
opcodes/operators.
Implemented for both the compiler and the disassembler. Often, the NOOP
opcode is used as padding for packages that are changed dynamically by
the
BIOS. When disassembled and recompiled, these NOOPs will cause syntax
errors. This option causes the disassembler to ignore all NOOP opcodes
(0xA3), and it also causes the compiler to ignore all ASL source code
NOOP
statements as well.

Debugger: Enhanced the Sleep command to execute all sleep states. This
change allows Sleep to be invoked with no arguments and causes the
debugger to execute all of the sleep states, 0-5, automatically.

----------------------------------------
20 December 2012. Summary of changes for version 20121220:

1) ACPICA Kernel-resident Subsystem:

Implemented a new interface, AcpiWalkResourceBuffer. This interface is an
alternate entry point for AcpiWalkResources and improves the usability of
the resource manager by accepting as input a buffer containing the output
of either a _CRS, _PRS, or _AEI method. The key functionality is that the
input buffer is not deleted by this interface so that it can be used by
the host later. See the ACPICA reference for details.

Interpreter: Add a warning if a 64-bit constant appears in a 32-bit table
(DSDT version < 2). The constant will be truncated and this warning
reflects that behavior.

Resource Manager: Add support for the new ACPI 5.0 wake bit in the IRQ,
ExtendedInterrupt, and GpioInt descriptors. This change adds support to
both get and set the new wake bit in these descriptors, separately from
the existing share bit. Reported by Aaron Lu.

Interpreter: Fix Store() when an implicit conversion is not possible. For
example, in the cases such as a store of a string to an existing package
object, implement the store as a CopyObject(). This is a small departure
from the ACPI specification which states that the control method should
be
aborted in this case. However, the ASLTS suite depends on this behavior.

Performance improvement for the various FUNCTION_TRACE and DEBUG_PRINT
macros: check if debug output is currently enabled as soon as possible to
minimize performance impact if debug is in fact not enabled.

Source code restructuring: Cleanup to improve modularity. The following
new files have been added: dbconvert.c, evhandler.c, nsprepkg.c,
psopinfo.c, psobject.c, rsdumpinfo.c, utstring.c, and utownerid.c.
Associated makefiles and project files have been updated.

Changed an exception code for LoadTable operator. For the case where one
of the input strings is too long, change the returned exception code from
AE_BAD_PARAMETER to AE_AML_STRING_LIMIT.

Fixed a possible memory leak in dispatcher error path. On error, delete
the mutex object created during method mutex creation. Reported by
tim.gardner@canonical.com.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Previous Release:
    Non-Debug Version:  94.3K Code, 25.3K Data, 119.6K Total
    Debug Version:     175.5K Code, 74.5K Data, 250.0K Total
  Current Release:
    Non-Debug Version:  94.5K Code, 25.5K Data, 120.0K Total
    Debug Version:     182.2K Code, 74.9K Data, 257.1K Total


2) iASL Compiler/Disassembler and Tools:

iASL: Disallow a method call as argument to the ObjectType ASL operator.
This change tracks an errata to the ACPI 5.0 document. The AML grammar
will not allow the interpreter to differentiate between a method and a
method invocation when these are used as an argument to the ObjectType
operator. The ACPI specification change is to disallow a method
invocation
(UserTerm) for the ObjectType operator.

Finish support for the TPM2 and CSRT tables in the headers, table
compiler, and disassembler.

Unix user-space OSL: Fix a problem with WaitSemaphore where the timeout
always expires immediately if the semaphore is not available. The
original
code was using a relative-time timeout, but sem_timedwait requires the
use
of an absolute time.

iASL: Added a remark if the Timer() operator is used within a 32-bit
table. This operator returns a 64-bit time value that will be truncated
within a 32-bit table.

iASL Source code restructuring: Cleanup to improve modularity. The
following new files have been added: aslhex.c, aslxref.c, aslnamesp.c,
aslmethod.c, and aslfileio.c. Associated makefiles and project files have
been updated.


----------------------------------------
14 November 2012. Summary of changes for version 20121114:

1) ACPICA Kernel-resident Subsystem:

Implemented a performance enhancement for ACPI/AML Package objects. This
change greatly increases the performance of Package objects within the
interpreter. It changes the processing of reference counts for packages
by
optimizing for the most common case where the package sub-objects are
either Integers, Strings, or Buffers. Increases the overall performance
of
the ASLTS test suite by 1.5X (Increases the Slack Mode performance by
2X.)
Chao Guan. ACPICA BZ 943.

Implemented and deployed common macros to extract flag bits from resource
descriptors. Improves readability and maintainability of the code. Fixes
a
problem with the UART serial bus descriptor for the number of data bits
flags (was incorrectly 2 bits, should be 3).

Enhanced the ACPI_GETx and ACPI_SETx macros. Improved the implementation
of the macros and changed the SETx macros to the style of (destination,
source). Also added ACPI_CASTx companion macros. Lv Zheng.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Previous Release:
    Non-Debug Version:  93.9K Code, 25.2K Data, 119.1K Total
    Debug Version:     175.5K Code, 74.5K Data, 250.0K Total
  Current Release:
    Non-Debug Version:  94.3K Code, 25.3K Data, 119.6K Total
    Debug Version:     175.5K Code, 74.5K Data, 250.0K Total


2) iASL Compiler/Disassembler and Tools:

Disassembler: Added the new ACPI 5.0 interrupt sharing flags. This change
adds the ShareAndWake and ExclusiveAndWake flags which were added to the
Irq, Interrupt, and Gpio resource descriptors in ACPI 5.0. ACPICA BZ 986.

Disassembler: Fixed a problem with external declaration generation. Fixes
a problem where an incorrect pathname could be generated for an external
declaration if the original reference to the object includes leading
carats (^). ACPICA BZ 984.

Debugger: Completed a major update for the Disassemble<method> command.
This command was out-of-date and did not properly disassemble control
methods that had any reasonable complexity. This fix brings the command
up
to the same level as the rest of the disassembler. Adds one new file,
dmdeferred.c, which is existing code that is now common with the main
disassembler and the debugger disassemble command. ACPICA MZ 978.

iASL: Moved the parser entry prototype to avoid a duplicate declaration.
Newer versions of Bison emit this prototype, so moved the prototype out
of
the iASL header to where it is actually used in order to avoid a
duplicate
declaration.

iASL/Tools: Standardized use of the stream I/O functions:
  1) Ensure check for I/O error after every fopen/fread/fwrite
  2) Ensure proper order of size/count arguments for fread/fwrite
  3) Use test of (Actual != Requested) after all fwrite, and most fread
  4) Standardize I/O error messages
Improves reliability and maintainability of the code. Bob Moore, Lv
Zheng.
ACPICA BZ 981.

Disassembler: Prevent duplicate External() statements. During generation
of external statements, detect similar pathnames that are actually
duplicates such as these:
  External (\ABCD)
  External (ABCD)
Remove all leading '\' characters from pathnames during the external
statement generation so that duplicates will be detected and tossed.
ACPICA BZ 985.

Tools: Replace low-level I/O with stream I/O functions. Replace
open/read/write/close with the stream I/O equivalents
fopen/fread/fwrite/fclose for portability and performance. Lv Zheng, Bob
Moore.

AcpiBin: Fix for the dump-to-hex function. Now correctly output the table
name header so that AcpiXtract recognizes the output file/table.

iASL: Remove obsolete -2 option flag. Originally intended to force the
compiler/disassembler into an ACPI 2.0 mode, this was never implemented
and the entire concept is now obsolete.

----------------------------------------
18 October 2012. Summary of changes for version 20121018:


1) ACPICA Kernel-resident Subsystem:

Updated support for the ACPI 5.0 MPST table. Fixes some problems
introduced by late changes to the table as it was added to the ACPI 5.0
specification. Includes header, disassembler, and data table compiler
support as well as a new version of the MPST template.

AcpiGetObjectInfo: Enhanced the device object support to include the ACPI
5.0 _SUB method. Now calls _SUB in addition to the other PNP-related ID
methods: _HID, _CID, and _UID.

Changed ACPI_DEVICE_ID to ACPI_PNP_DEVICE_ID. Also changed
ACPI_DEVICE_ID_LIST to ACPI_PNP_DEVICE_ID_LIST. These changes prevent
name collisions on hosts that reserve the *_DEVICE_ID (or *DeviceId)
names for their various drivers. Affects the AcpiGetObjectInfo external
interface, and other internal interfaces as well.

Added and deployed a new macro for ACPI_NAME management: ACPI_MOVE_NAME.
This macro resolves to a simple 32-bit move of the 4-character ACPI_NAME
on machines that support non-aligned transfers. Optimizes for this case
rather than using a strncpy. With assistance from Zheng Lv.

Resource Manager: Small fix for buffer size calculation. Fixed a one byte
error in the output buffer calculation. Feng Tang. ACPICA BZ 849.

Added a new debug print message for AML mutex objects that are force-
released. At control method termination, any currently acquired mutex
objects are force-released. Adds a new debug-only message for each one
that is released.

Audited/updated all ACPICA return macros and the function debug depth
counter: 1) Ensure that all functions that use the various TRACE macros
also use the appropriate ACPICA return macros. 2) Ensure that all normal
return statements surround the return expression (value) with parens to
ensure consistency across the ACPICA code base. Guan Chao, Tang Feng,
Zheng Lv, Bob Moore. ACPICA Bugzilla 972.

Global source code changes/maintenance: All extra lines at the start and
end of each source file have been removed for consistency. Also, within
comments, all new sentences start with a single space instead of a double
space, again for consistency across the code base.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a much larger code and data size.

  Previous Release:
    Non-Debug Version:  93.7K Code, 25.3K Data, 119.0K Total
    Debug Version:     175.0K Code, 74.4K Data, 249.4K Total
  Current Release:
    Non-Debug Version:  93.9K Code, 25.2K Data, 119.1K Total
    Debug Version:     175.5K Code, 74.5K Data, 250.0K Total


2) iASL Compiler/Disassembler and Tools:

AcpiExec: Improved the algorithm used for memory leak/corruption
detection. Added some intelligence to the code that maintains the global
list of allocated memory. The list is now ordered by allocated memory
address, significantly improving performance. When running AcpiExec on
the ASLTS test suite, speed improvements of 3X to 5X are seen, depending
on the platform and/or the environment. Note, this performance
enhancement affects the AcpiExec utility only, not the kernel-resident
ACPICA code.

Enhanced error reporting for invalid AML opcodes and bad ACPI_NAMEs. For
the disassembler, dump the 48 bytes surrounding the invalid opcode. Fix
incorrect table offset reported for invalid opcodes. Report the original
32-bit value for bad ACPI_NAMEs (as well as the repaired name.)

Disassembler: Enhanced the -vt option to emit the binary table data in
hex format to assist with debugging.

Fixed a potential filename buffer overflow in osunixdir.c. Increased the
size of file structure. Colin Ian King.

----------------------------------------
13 September 2012. Summary of changes for version 20120913:


1) ACPICA Kernel-resident Subsystem:

ACPI 5.0: Added two new notify types for the Hardware Error Notification
Structure within the Hardware Error Source Table (HEST) table -- CMCI(5)
and
MCE(6).

Table Manager: Merged/removed duplicate code in the root table resize
functions. One function is external, the other is internal. Lv Zheng,
ACPICA
BZ 846.

Makefiles: Completely removed the obsolete "Linux" makefiles under
acpica/generate/linux. These makefiles are obsolete and have been
replaced
by
the generic unix makefiles under acpica/generate/unix.

Makefiles: Ensure that binary files always copied properly. Minor rule
change
to ensure that the final binary output files are always copied up to the
appropriate binary directory (bin32 or bin64.)

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug
version of the code includes the debug output trace mechanism and has a
much
larger code and data size.

  Previous Release:
    Non-Debug Version:  93.8K Code, 25.3K Data, 119.1K Total
    Debug Version:     175.7K Code, 74.8K Data, 250.5K Total
  Current Release:
    Non-Debug Version:  93.7K Code, 25.3K Data, 119.0K Total
    Debug Version:     175.0K Code, 74.4K Data, 249.4K Total


2) iASL Compiler/Disassembler and Tools:

Disassembler: Fixed a possible fault during the disassembly of resource
descriptors when a second parse is required because of the invocation of
external control methods within the table. With assistance from
adq@lidskialf.net. ACPICA BZ 976.

iASL: Fixed a namepath optimization problem. An error can occur if the
parse
node that contains the namepath to be optimized does not have a parent
node
that is a named object. This change fixes the problem.

iASL: Fixed a regression where the AML file is not deleted on errors. The
AML
output file should be deleted if there are any errors during the
compiler.
The
only exception is if the -f (force output) option is used. ACPICA BZ 974.

iASL: Added a feature to automatically increase internal line buffer
sizes.
Via realloc(), automatically increase the internal line buffer sizes as
necessary to support very long source code lines. The current version of
the
preprocessor requires a buffer long enough to contain full source code
lines.
This change increases the line buffer(s) if the input lines go beyond the
current buffer size. This eliminates errors that occurred when a source
code
line was longer than the buffer.

iASL: Fixed a problem with constant folding in method declarations. The
SyncLevel term is a ByteConstExpr, and incorrect code would be generated
if a
Type3 opcode was used.

Debugger: Improved command help support. For incorrect argument count,
display
full help for the command. For help command itself, allow an argument to
specify a command.

Test Suites: Several bug fixes for the ASLTS suite reduces the number of
errors during execution of the suite. Guan Chao.

----------------------------------------
16 August 2012. Summary of changes for version 20120816:


1) ACPICA Kernel-resident Subsystem:

Removed all use of the deprecated _GTS and _BFS predefined methods. The
_GTS
(Going To Sleep) and _BFS (Back From Sleep) methods are essentially
deprecated and will probably be removed from the ACPI specification.
Windows
does not invoke them, and reportedly never will. The final nail in the
coffin
is that the ACPI specification states that these methods must be run with
interrupts off, which is not going to happen in a kernel interpreter.
Note:
Linux has removed all use of the methods also. It was discovered that
invoking these functions caused failures on some machines, probably
because
they were never tested since Windows does not call them. Affects two
external
interfaces, AcpiEnterSleepState and AcpiLeaveSleepStatePrep. Tang Feng.
ACPICA BZ 969.

Implemented support for complex bit-packed buffers returned from the _PLD
(Physical Location of Device) predefined method. Adds a new external
interface, AcpiDecodePldBuffer that parses the buffer into a more usable
C
structure. Note: C Bitfields cannot be used for this type of predefined
structure since the memory layout of individual bitfields is not defined
by
the C language. In addition, there are endian concerns where a compiler
will
change the bitfield ordering based on the machine type. The new ACPICA
interface eliminates these issues, and should be called after _PLD is
executed. ACPICA BZ 954.

Implemented a change to allow a scope change to root (via "Scope (\)")
during
execution of module-level ASL code (code that is executed at table load
time.) Lin Ming.

Added the Windows8/Server2012 string for the _OSI method. This change
adds
a
new _OSI string, "Windows 2012" for both Windows 8 and Windows Server
2012.

Added header support for the new ACPI tables DBG2 (Debug Port Table Type
2)
and CSRT (Core System Resource Table).

Added struct header support for the _FDE, _GRT, _GTM, and _SRT predefined
names. This simplifies access to the buffers returned by these predefined
names. Adds a new file, include/acbuffer.h. ACPICA BZ 956.

GPE support: Removed an extraneous parameter from the various low-level
internal GPE functions. Tang Feng.

Removed the linux makefiles from the unix packages. The generate/linux
makefiles are obsolete and have been removed from the unix tarball
release
packages. The replacement makefiles are under generate/unix, and there is
a
top-level makefile under the main acpica directory. ACPICA BZ 967, 912.

Updates for Unix makefiles:
1) Add -D_FORTIFY_SOURCE=2 for gcc generation. Arjan van de Ven.
2) Update linker flags (move to end of command line) for AcpiExec
utility.
Guan Chao.

Split ACPICA initialization functions to new file, utxfinit.c. Split from
utxface.c to improve modularity and reduce file size.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  93.5K Code, 25.3K Data, 118.8K Total
    Debug Version:     173.7K Code, 74.0K Data, 247.7K Total
  Current Release:
    Non-Debug Version:  93.8K Code, 25.3K Data, 119.1K Total
    Debug Version:     175.7K Code, 74.8K Data, 250.5K Total


2) iASL Compiler/Disassembler and Tools:

iASL: Fixed a problem with constant folding for fixed-length constant
expressions. The constant-folding code was not being invoked for constant
expressions that allow the use of type 3/4/5 opcodes to generate
constants
for expressions such as ByteConstExpr, WordConstExpr, etc. This could
result
in the generation of invalid AML bytecode. ACPICA BZ 970.

iASL: Fixed a generation issue on newer versions of Bison. Newer versions
apparently automatically emit some of the necessary externals. This
change
handles these versions in order to eliminate generation warnings.

Disassembler: Added support to decode the DBG2 and CSRT ACPI tables.

Disassembler: Add support to decode _PLD buffers. The decoded buffer
appears
within comments in the output file.

Debugger: Fixed a regression with the "Threads" command where
AE_BAD_PARAMETER was always returned.

----------------------------------------
11 July 2012. Summary of changes for version 20120711:

1) ACPICA Kernel-resident Subsystem:

Fixed a possible fault in the return package object repair code. Fixes a
problem that can occur when a lone package object is wrapped with an
outer
package object in order to force conformance to the ACPI specification.
Can
affect these predefined names: _ALR, _MLS, _PSS, _TRT, _TSS, _PRT, _HPX,
_DLM,
_CSD, _PSD, _TSD.

Removed code to disable/enable bus master arbitration (ARB_DIS bit in the
PM2_CNT register) in the ACPICA sleep/wake interfaces. Management of the
ARB_DIS bit must be implemented in the host-dependent C3 processor power
state
support. Note, ARB_DIS is obsolete and only applies to older chipsets,
both
Intel and other vendors. (for Intel: ICH4-M and earlier)

This change removes the code to disable/enable bus master arbitration
during
suspend/resume. Use of the ARB_DIS bit in the optional PM2_CNT register
causes
resume problems on some machines. The change has been in use for over
seven
years within Linux.

Implemented two new external interfaces to support host-directed dynamic
ACPI
table load and unload. They are intended to simplify the host
implementation
of hot-plug support:
  AcpiLoadTable: Load an SSDT from a buffer into the namespace.
  AcpiUnloadParentTable: Unload an SSDT via a named object owned by the
table.
See the ACPICA reference for additional details. Adds one new file,
components/tables/tbxfload.c

Implemented and deployed two new interfaces for errors and warnings that
are
known to be caused by BIOS/firmware issues:
  AcpiBiosError: Prints "ACPI Firmware Error" message.
  AcpiBiosWarning: Prints "ACPI Firmware Warning" message.
Deployed these new interfaces in the ACPICA Table Manager code for ACPI
table
and FADT errors. Additional deployment to be completed as appropriate in
the
future. The associated conditional macros are ACPI_BIOS_ERROR and
ACPI_BIOS_WARNING. See the ACPICA reference for additional details.
ACPICA
BZ
843.

Implicit notify support: ensure that no memory allocation occurs within a
critical region. This fix moves a memory allocation outside of the time
that a
spinlock is held. Fixes issues on systems that do not allow this
behavior.
Jung-uk Kim.

Split exception code utilities and tables into a new file,
utilities/utexcep.c

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug
version of the code includes the debug output trace mechanism and has a
much
larger code and data size.

  Previous Release:
    Non-Debug Version:  93.1K Code, 25.1K Data, 118.2K Total
    Debug Version:     172.9K Code, 73.6K Data, 246.5K Total
  Current Release:
    Non-Debug Version:  93.5K Code, 25.3K Data, 118.8K Total
    Debug Version:     173.7K Code, 74.0K Data, 247.7K Total


2) iASL Compiler/Disassembler and Tools:

iASL: Fixed a parser problem for hosts where EOF is defined as -1 instead
of
0. Jung-uk Kim.

Debugger: Enhanced the "tables" command to emit additional information
about
the current set of ACPI tables, including the owner ID and flags decode.

Debugger: Reimplemented the "unload" command to use the new
AcpiUnloadParentTable external interface. This command was disable
previously
due to need for an unload interface.

AcpiHelp: Added a new option to decode ACPICA exception codes. The -e
option
will decode 16-bit hex status codes (ACPI_STATUS) to name strings.

----------------------------------------
20 June 2012. Summary of changes for version 20120620:


1) ACPICA Kernel-resident Subsystem:

Implemented support to expand the "implicit notify" feature to allow
multiple
devices to be notified by a single GPE. This feature automatically
generates a
runtime device notification in the absence of a BIOS-provided GPE control
method (_Lxx/_Exx) or a host-installed handler for the GPE. Implicit
notify is
provided by ACPICA for Windows compatibility, and is a workaround for
BIOS
AML
code errors. See the description of the AcpiSetupGpeForWake interface in
the
APCICA reference. Bob Moore, Rafael Wysocki. ACPICA BZ 918.

Changed some comments and internal function names to simplify and ensure
correctness of the Linux code translation. No functional changes.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug
version of the code includes the debug output trace mechanism and has a
much
larger code and data size.

  Previous Release:
    Non-Debug Version:  93.0K Code, 25.1K Data, 118.1K Total
    Debug Version:     172.7K Code, 73.6K Data, 246.3K Total
  Current Release:
    Non-Debug Version:  93.1K Code, 25.1K Data, 118.2K Total
    Debug Version:     172.9K Code, 73.6K Data, 246.5K Total


2) iASL Compiler/Disassembler and Tools:

Disassembler: Added support to emit short, commented descriptions for the
ACPI
predefined names in order to improve the readability of the disassembled
output. ACPICA BZ 959. Changes include:
  1) Emit descriptions for all standard predefined names (_INI, _STA,
_PRW,
etc.)
  2) Emit generic descriptions for the special names (_Exx, _Qxx, etc.)
  3) Emit descriptions for the resource descriptor names (_MIN, _LEN,
etc.)

AcpiSrc: Fixed several long-standing Linux code translation issues.
Argument
descriptions in function headers are now translated properly to lower
case
and
underscores. ACPICA BZ 961. Also fixes translation problems such as
these:
(old -> new)
  i_aSL -> iASL
  00-7_f -> 00-7F
  16_k -> 16K
  local_fADT -> local_FADT
  execute_oSI -> execute_OSI

iASL: Fixed a problem where null bytes were inadvertently emitted into
some
listing files.

iASL: Added the existing debug options to the standard help screen. There
are
no longer two different help screens. ACPICA BZ 957.

AcpiHelp: Fixed some typos in the various predefined name descriptions.
Also
expand some of the descriptions where appropriate.

iASL: Fixed the -ot option (display compile times/statistics). Was not
working
properly for standard output; only worked for the debug file case.

----------------------------------------
18 May 2012. Summary of changes for version 20120518:


1) ACPICA Core Subsystem:

Added a new OSL interface, AcpiOsWaitEventsComplete. This interface is
defined
to block until asynchronous events such as notifies and GPEs have
completed.
Within ACPICA, it is only called before a notify or GPE handler is
removed/uninstalled. It also may be useful for the host OS within related
drivers such as the Embedded Controller driver. See the ACPICA reference
for
additional information. ACPICA BZ 868.

ACPI Tables: Added a new error message for a possible overflow failure
during
the conversion of FADT 32-bit legacy register addresses to internal
common
64-
bit GAS structure representation. The GAS has a one-byte "bit length"
field,
thus limiting the register length to 255 bits. ACPICA BZ 953.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug
version of the code includes the debug output trace mechanism and has a
much
larger code and data size.

  Previous Release:
    Non-Debug Version:  92.9K Code, 25.0K Data, 117.9K Total
    Debug Version:     172.6K Code, 73.4K Data, 246.0K Total
  Current Release:
    Non-Debug Version:  93.0K Code, 25.1K Data, 118.1K Total
    Debug Version:     172.7K Code, 73.6K Data, 246.3K Total


2) iASL Compiler/Disassembler and Tools:

iASL: Added the ACPI 5.0 "PCC" keyword for use in the Register() ASL
macro.
This keyword was added late in the ACPI 5.0 release cycle and was not
implemented until now.

Disassembler: Added support for Operation Region externals. Adds missing
support for operation regions that are defined in another table, and
referenced locally via a Field or BankField ASL operator. Now generates
the
correct External statement.

Disassembler: Several additional fixes for the External() statement
generation
related to some ASL operators. Also, order the External() statements
alphabetically in the disassembler output. Fixes the External()
generation
for
the Create* field, Alias, and Scope operators:
 1) Create* buffer field operators - fix type mismatch warning on
disassembly
 2) Alias - implement missing External support
 3) Scope - fix to make sure all necessary externals are emitted.

iASL: Improved pathname support. For include files, merge the prefix
pathname
with the file pathname and eliminate unnecessary components. Convert
backslashes in all pathnames to forward slashes, for readability. Include
file
pathname changes affect both #include and Include() type operators.

iASL/DTC/Preprocessor: Gracefully handle early EOF. Handle an EOF at the
end
of a valid line by inserting a newline and then returning the EOF during
the
next call to GetNextLine. Prevents the line from being ignored due to EOF
condition.

iASL: Implemented some changes to enhance the IDE support (-vi option.)
Error
and Warning messages are now correctly recognized for both the source
code
browser and the global error and warning counts.

----------------------------------------
20 April 2012. Summary of changes for version 20120420:


1) ACPICA Core Subsystem:

Implemented support for multiple notify handlers. This change adds
support
to
allow multiple system and device notify handlers on Device, Thermal Zone,
and
Processor objects. This can simplify the host OS notification
implementation.
Also re-worked and restructured the entire notify support code to
simplify
handler installation, handler removal, notify event queuing, and notify
dispatch to handler(s). Note: there can still only be two global notify
handlers - one for system notifies and one for device notifies. There are
no
changes to the existing handler install/remove interfaces. Lin Ming, Bob
Moore, Rafael Wysocki.

Fixed a regression in the package repair code where the object reference
count was calculated incorrectly. Regression was introduced in the commit
"Support to add Package wrappers".

Fixed a couple possible memory leaks in the AML parser, in the error
recovery
path. Jesper Juhl, Lin Ming.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  92.9K Code, 25.0K Data, 117.9K Total
    Debug Version:     172.5K Code, 73.2K Data, 245.7K Total
  Current Release:
    Non-Debug Version:  92.9K Code, 25.0K Data, 117.9K Total
    Debug Version:     172.6K Code, 73.4K Data, 246.0K Total


2) iASL Compiler/Disassembler and Tools:

iASL: Fixed a problem with the resource descriptor support where the
length
of the StartDependentFn and StartDependentFnNoPrio descriptors were not
included in cumulative descriptor offset, resulting in incorrect values
for
resource tags within resource descriptors appearing after a
StartDependent*
descriptor. Reported by Petr Vandrovec. ACPICA BZ 949.

iASL and Preprocessor: Implemented full support for the #line directive
to
correctly track original source file line numbers through the .i
preprocessor
output file - for error and warning messages.

iASL: Expand the allowable byte constants for address space IDs.
Previously,
the allowable range was 0x80-0xFF (user-defined spaces), now the range is
0x0A-0xFF to allow for custom and new IDs without changing the compiler.

iASL: Add option to treat all warnings as errors (-we). ACPICA BZ 948.

iASL: Add option to completely disable the preprocessor (-Pn).

iASL: Now emit all error/warning messages to standard error (stderr) by
default (instead of the previous stdout).

ASL Test Suite (ASLTS): Reduce iASL warnings due to use of Switch().
Update
for resource descriptor offset fix above. Update/cleanup error output
routines. Enable and send iASL errors/warnings to an error logfile
(error.txt). Send all other iASL output to a logfile (compiler.txt).
Fixed
several extraneous "unrecognized operator" messages.

----------------------------------------
20 March 2012. Summary of changes for version 20120320:


1) ACPICA Core Subsystem:

Enhanced the sleep/wake interfaces to optionally execute the _GTS method
(Going To Sleep) and the _BFS method (Back From Sleep). Windows
apparently
does not execute these methods, and therefore these methods are often
untested. It has been seen on some systems where the execution of these
methods causes errors and also prevents the machine from entering S5. It
is
therefore suggested that host operating systems do not execute these
methods
by default. In the future, perhaps these methods can be optionally
executed
based on the age of the system and/or what is the newest version of
Windows
that the BIOS asks for via _OSI. Changed interfaces: AcpiEnterSleepState
and
AcpileaveSleepStatePrep. See the ACPICA reference and Linux BZ 13041. Lin
Ming.

Fixed a problem where the length of the local/common FADT was set too
early.
The local FADT table length cannot be set to the common length until the
original length has been examined. There is code that checks the table
length
and sets various fields appropriately. This can affect older machines
with
early FADT versions. For example, this can cause inadvertent writes to
the
CST_CNT register. Julian Anastasov.

Fixed a mapping issue related to a physical table override. Use the
deferred
mapping mechanism for tables loaded via the physical override OSL
interface.
This allows for early mapping before the virtual memory manager is
available.
Thomas Renninger, Bob Moore.

Enhanced the automatic return-object repair code: Repair a common problem
with
predefined methods that are defined to return a variable-length Package
of
sub-objects. If there is only one sub-object, some BIOS ASL code
mistakenly
simply returns the single object instead of a Package with one sub-
object.
This new support will repair this error by wrapping a Package object
around
the original object, creating the correct and expected Package with one
sub-
object. Names that can be repaired in this manner include: _ALR, _CSD,
_HPX,
_MLS, _PLD, _PRT, _PSS, _TRT, _TSS, _BCL, _DOD, _FIX, and _Sx. ACPICA BZ
939.

Changed the exception code returned for invalid ACPI paths passed as
parameters to external interfaces such as AcpiEvaluateObject. Was
AE_BAD_PARAMETER, now is the more sensible AE_BAD_PATHNAME.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug
version of the code includes the debug output trace mechanism and has a
much
larger code and data size.

  Previous Release:
    Non-Debug Version:  93.0K Code, 25.0K Data, 118.0K Total
    Debug Version:     172.5K Code, 73.2K Data, 245.7K Total
  Current Release:
    Non-Debug Version:  92.9K Code, 25.0K Data, 117.9K Total
    Debug Version:     172.5K Code, 73.2K Data, 245.7K Total


2) iASL Compiler/Disassembler and Tools:

iASL: Added the infrastructure and initial implementation of a integrated
C-
like preprocessor. This will simplify BIOS development process by
eliminating
the need for a separate preprocessing step during builds. On Windows, it
also
eliminates the need to install a separate C compiler. ACPICA BZ 761. Some
features including full #define() macro support are still under
development.
These preprocessor directives are supported:
    #define
    #elif
    #else
    #endif
    #error
    #if
    #ifdef
    #ifndef
    #include
    #pragma message
    #undef
    #warning
In addition, these new command line options are supported:
    -D <symbol> Define symbol for preprocessor use
    -li         Create preprocessed output file (*.i)
    -P          Preprocess only and create preprocessor output file (*.i)

Table Compiler: Fixed a problem where the equals operator within an
expression
did not work properly.

Updated iASL to use the current versions of Bison/Flex. Updated the
Windows
project file to invoke these tools from the standard location. ACPICA BZ
904.
Versions supported:
    Flex for Windows:  V2.5.4
    Bison for Windows: V2.4.1

----------------------------------------
15 February 2012. Summary of changes for version 20120215:


1) ACPICA Core Subsystem:

There have been some major changes to the sleep/wake support code, as
described below (a - e).

a) The AcpiLeaveSleepState has been split into two interfaces, similar to
AcpiEnterSleepStatePrep and AcpiEnterSleepState. The new interface is
AcpiLeaveSleepStatePrep. This allows the host to perform actions between
the
time the _BFS method is called and the _WAK method is called. NOTE: all
hosts
must update their wake/resume code or else sleep/wake will not work
properly.
Rafael Wysocki.

b) In AcpiLeaveSleepState, now enable all runtime GPEs before calling the
_WAK
method. Some machines require that the GPEs are enabled before the _WAK
method
is executed. Thomas Renninger.

c) In AcpiLeaveSleepState, now always clear the WAK_STS (wake status)
bit.
Some BIOS code assumes that WAK_STS will be cleared on resume and use it
to
determine whether the system is rebooting or resuming. Matthew Garrett.

d) Move the invocations of _GTS (Going To Sleep) and _BFS (Back From
Sleep) to
match the ACPI specification requirement. Rafael Wysocki.

e) Implemented full support for the ACPI 5.0 SleepStatus and SleepControl
registers within the V5 FADT. This support adds two new files:
hardware/hwesleep.c implements the support for the new registers. Moved
all
sleep/wake external interfaces to hardware/hwxfsleep.c.


Added a new OSL interface for ACPI table overrides,
AcpiOsPhysicalTableOverride. This interface allows the host to override a
table via a physical address, instead of the logical address required by
AcpiOsTableOverride. This simplifies the host implementation. Initial
implementation by Thomas Renninger. The ACPICA implementation creates a
single
shared function for table overrides that attempts both a logical and a
physical override.

Expanded the OSL memory read/write interfaces to 64-bit data
(AcpiOsReadMemory, AcpiOsWriteMemory.) This enables full 64-bit memory
transfer support for GAS register structures passed to AcpiRead and
AcpiWrite.

Implemented the ACPI_REDUCED_HARDWARE option to allow the creation of a
custom
build of ACPICA that supports only the ACPI 5.0 reduced hardware (SoC)
model.
See the ACPICA reference for details. ACPICA BZ 942. This option removes
about
10% of the code and 5% of the static data, and the following hardware
ACPI
features become unavailable:
    PM Event and Control registers
    SCI interrupt (and handler)
    Fixed Events
    General Purpose Events (GPEs)
    Global Lock
    ACPI PM timer
    FACS table (Waking vectors and Global Lock)

Updated the unix tarball directory structure to match the ACPICA git
source
tree. This ensures that the generic unix makefiles work properly (in
generate/unix).  Also updated the Linux makefiles to match. ACPICA BZ
867.

Updated the return value of the _REV predefined method to integer value 5
to
reflect ACPI 5.0 support.

Moved the external ACPI PM timer interface prototypes to the public
acpixf.h
file where they belong.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug
version of the code includes the debug output trace mechanism and has a
much
larger code and data size.

  Previous Release:
    Non-Debug Version:  92.8K Code, 24.9K Data, 117.7K Total
    Debug Version:     171.7K Code, 72.9K Data, 244.5K Total
  Current Release:
    Non-Debug Version:  93.0K Code, 25.0K Data, 118.0K Total
    Debug Version:     172.5K Code, 73.2K Data, 245.7K Total


2) iASL Compiler/Disassembler and Tools:

Disassembler: Fixed a problem with the new ACPI 5.0 serial resource
descriptors (I2C, SPI, UART) where the resource produce/consumer bit was
incorrectly displayed.

AcpiHelp: Add display of ACPI/PNP device IDs that are defined in the ACPI
specification.

----------------------------------------
11 January 2012. Summary of changes for version 20120111:


1) ACPICA Core Subsystem:

Implemented a new mechanism to allow host device drivers to check for
address
range conflicts with ACPI Operation Regions. Both SystemMemory and
SystemIO
address spaces are supported. A new external interface,
AcpiCheckAddressRange,
allows drivers to check an address range against the ACPI namespace. See
the
ACPICA reference for additional details. Adds one new file,
utilities/utaddress.c. Lin Ming, Bob Moore.

Fixed several issues with the ACPI 5.0 FADT support: Add the sleep
Control
and
Status registers, update the ACPI 5.0 flags, and update internal data
structures to handle an FADT larger than 256 bytes. The size of the ACPI
5.0
FADT is 268 bytes.

Updated all ACPICA copyrights and signons to 2012. Added the 2012
copyright to
all module headers and signons, including the standard Linux header. This
affects virtually every file in the ACPICA core subsystem, iASL compiler,
and
all ACPICA utilities.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug
version of the code includes the debug output trace mechanism and has a
much
larger code and data size.

  Previous Release:
    Non-Debug Version:  92.3K Code, 24.9K Data, 117.2K Total
    Debug Version:     170.8K Code, 72.6K Data, 243.4K Total
  Current Release:
    Non-Debug Version:  92.8K Code, 24.9K Data, 117.7K Total
    Debug Version:     171.7K Code, 72.9K Data, 244.5K Total


2) iASL Compiler/Disassembler and Tools:

Disassembler: fixed a problem with the automatic resource tag generation
support. Fixes a problem where the resource tags are inadvertently not
constructed if the table being disassembled contains external references
to
control methods. Moved the actual construction of the tags to after the
final
namespace is constructed (after 2nd parse is invoked due to external
control
method references.) ACPICA BZ 941.

Table Compiler: Make all "generic" operators caseless. These are the
operators
like UINT8, String, etc. Making these caseless improves ease-of-use.
ACPICA BZ
934.

----------------------------------------
23 November 2011. Summary of changes for version 20111123:

0) ACPI 5.0 Support:

This release contains full support for the ACPI 5.0 specification, as
summarized below.

Reduced Hardware Support:
-------------------------

This support allows for ACPI systems without the usual ACPI hardware.
This
support is enabled by a flag in the revision 5 FADT. If it is set, ACPICA
will
not attempt to initialize or use any of the usual ACPI hardware. Note,
when
this flag is set, all of the following ACPI hardware is assumed to be not
present and is not initialized or accessed:

    General Purpose Events (GPEs)
    Fixed Events (PM1a/PM1b and PM Control)
    Power Management Timer and Console Buttons (power/sleep)
    Real-time Clock Alarm
    Global Lock
    System Control Interrupt (SCI)
    The FACS is assumed to be non-existent

ACPI Tables:
------------

All new tables and updates to existing tables are fully supported in the
ACPICA headers (for use by device drivers), the disassembler, and the
iASL
Data Table Compiler. ACPI 5.0 defines these new tables:

    BGRT        /* Boot Graphics Resource Table */
    DRTM        /* Dynamic Root of Trust for Measurement table */
    FPDT        /* Firmware Performance Data Table */
    GTDT        /* Generic Timer Description Table */
    MPST        /* Memory Power State Table */
    PCCT        /* Platform Communications Channel Table */
    PMTT        /* Platform Memory Topology Table */
    RASF        /* RAS Feature table */

Operation Regions/SpaceIDs:
---------------------------

All new operation regions are fully supported by the iASL compiler, the
disassembler, and the ACPICA runtime code (for dispatch to region
handlers.)
The new operation region Space IDs are:

    GeneralPurposeIo
    GenericSerialBus

Resource Descriptors:
---------------------

All new ASL resource descriptors are fully supported by the iASL
compiler,
the
ASL/AML disassembler, and the ACPICA runtime Resource Manager code
(including
all new predefined resource tags). New descriptors are:

    FixedDma
    GpioIo
    GpioInt
    I2cSerialBus
    SpiSerialBus
    UartSerialBus

ASL/AML Operators, New and Modified:
------------------------------------

One new operator is added, the Connection operator, which is used to
associate
a GeneralPurposeIo or GenericSerialBus resource descriptor with
individual
field objects within an operation region. Several new protocols are
associated
with the AccessAs operator. All are fully supported by the iASL compiler,
disassembler, and runtime ACPICA AML interpreter:

    Connection                      // Declare Field Connection
attributes
    AccessAs: AttribBytes (n)           // Read/Write N-Bytes Protocol
    AccessAs: AttribRawBytes (n)        // Raw Read/Write N-Bytes
Protocol
    AccessAs: AttribRawProcessBytes (n) // Raw Process Call Protocol
    RawDataBuffer                       // Data type for Vendor Data
fields

Predefined ASL/AML Objects:
---------------------------

All new predefined objects/control-methods are supported by the iASL
compiler
and the ACPICA runtime validation/repair (arguments and return values.)
New
predefined names include the following:

Standard Predefined Names (Objects or Control Methods):
    _AEI, _CLS, _CPC, _CWS, _DEP,
    _DLM, _EVT, _GCP, _CRT, _GWS,
    _HRV, _PRE, _PSE, _SRT, _SUB.

Resource Tags (Names used to access individual fields within resource
descriptors):
    _DBT, _DPL, _DRS, _END, _FLC,
    _IOR, _LIN, _MOD, _PAR, _PHA,
    _PIN, _PPI, _POL, _RXL, _SLV,
    _SPE, _STB, _TXL, _VEN.

ACPICA External Interfaces:
---------------------------

Several new interfaces have been defined for use by ACPI-related device
drivers and other host OS services:

AcpiAcquireMutex and AcpiReleaseMutex: These interfaces allow the host OS
to
acquire and release AML mutexes that are defined in the DSDT/SSDT tables
provided by the BIOS. They are intended to be used in conjunction with
the
ACPI 5.0 _DLM (Device Lock Method) in order to provide transaction-level
mutual exclusion with the AML code/interpreter.

AcpiGetEventResources: Returns the (formatted) resource descriptors as
defined
by the ACPI 5.0 _AEI object (ACPI Event Information).  This object
provides
resource descriptors associated with hardware-reduced platform events,
similar
to the AcpiGetCurrentResources interface.

Operation Region Handlers: For General Purpose IO and Generic Serial Bus
operation regions, information about the Connection() object and any
optional
length information is passed to the region handler within the Context
parameter.

AcpiBufferToResource: This interface converts a raw AML buffer containing
a
resource template or resource descriptor to the ACPI_RESOURCE internal
format
suitable for use by device drivers. Can be used by an operation region
handler
to convert the Connection() buffer object into a ACPI_RESOURCE.

Miscellaneous/Tools/TestSuites:
-------------------------------

Support for extended _HID names (Four alpha characters instead of three).
Support for ACPI 5.0 features in the AcpiExec and AcpiHelp utilities.
Support for ACPI 5.0 features in the ASLTS test suite.
Fully updated documentation (ACPICA and iASL reference documents.)

ACPI Table Definition Language:
-------------------------------

Support for this language was implemented and released as a subsystem of
the
iASL compiler in 2010. (See the iASL compiler User Guide.)


Non-ACPI 5.0 changes for this release:
--------------------------------------

1) ACPICA Core Subsystem:

Fix a problem with operation region declarations where a failure can
occur
if
the region name and an argument that evaluates to an object (such as the
region address) are in different namespace scopes. Lin Ming, ACPICA BZ
937.

Do not abort an ACPI table load if an invalid space ID is found within.
This
will be caught later if the offending method is executed. ACPICA BZ 925.

Fixed an issue with the FFixedHW space ID where the ID was not always
recognized properly (Both ACPICA and iASL). ACPICA BZ 926.

Fixed a problem with the 32-bit generation of the unix-specific OSL
(osunixxf.c). Lin Ming, ACPICA BZ 936.

Several changes made to enable generation with the GCC 4.6 compiler.
ACPICA BZ
935.

New error messages: Unsupported I/O requests (not 8/16/32 bit), and
Index/Bank
field registers out-of-range.

2) iASL Compiler/Disassembler and Tools:

iASL: Implemented the __PATH__ operator, which returns the full pathname
of
the current source file.

AcpiHelp: Automatically display expanded keyword information for all ASL
operators.

Debugger: Add "Template" command to disassemble/dump resource template
buffers.

Added a new master script to generate and execute the ASLTS test suite.
Automatically handles 32- and 64-bit generation. See tests/aslts.sh

iASL: Fix problem with listing generation during processing of the
Switch()
operator where AML listing was disabled until the entire Switch block was
completed.

iASL: Improve support for semicolon statement terminators. Fix "invalid
character" message for some cases when the semicolon is used. Semicolons
are
now allowed after every <Term> grammar element. ACPICA BZ 927.

iASL: Fixed some possible aliasing warnings during generation. ACPICA BZ
923.

Disassembler: Fix problem with disassembly of the DataTableRegion
operator
where an inadvertent "Unhandled deferred opcode" message could be
generated.

3) Example Code and Data Size

These are the sizes for the OS-independent acpica.lib produced by the
Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
includes the debug output trace mechanism and has a much larger code and
data
size.

  Previous Release:
    Non-Debug Version:  90.2K Code, 23.9K Data, 114.1K Total
    Debug Version:     165.6K Code, 68.4K Data, 234.0K Total
  Current Release:
    Non-Debug Version:  92.3K Code, 24.9K Data, 117.2K Total
    Debug Version:     170.8K Code, 72.6K Data, 243.4K Total

----------------------------------------
22 September 2011. Summary of changes for version 20110922:

0) ACPI 5.0 News:

Support for ACPI 5.0 in ACPICA has been underway for several months and
will
be released at the same time that ACPI 5.0 is officially released.

The ACPI 5.0 specification is on track for release in the next few
months.

1) ACPICA Core Subsystem:

Fixed a problem where the maximum sleep time for the Sleep() operator was
intended to be limited to two seconds, but was inadvertently limited to
20
seconds instead.

Linux and Unix makefiles: Added header file dependencies to ensure
correct
generation of ACPICA core code and utilities. Also simplified the
makefiles
considerably through the use of the vpath variable to specify search
paths.
ACPICA BZ 924.

2) iASL Compiler/Disassembler and Tools:

iASL: Implemented support to check the access length for all fields
created to
access named Resource Descriptor fields. For example, if a resource field
is
defined to be two bits, a warning is issued if a CreateXxxxField() is
used
with an incorrect bit length. This is implemented for all current
resource
descriptor names. ACPICA BZ 930.

Disassembler: Fixed a byte ordering problem with the output of 24-bit and
56-
bit integers.

iASL: Fixed a couple of issues associated with variable-length package
objects. 1) properly handle constants like One, Ones, Zero -- do not make
a
VAR_PACKAGE when these are used as a package length. 2) Allow the
VAR_PACKAGE
opcode (in addition to PACKAGE) when validating object types for
predefined
names.

iASL: Emit statistics for all output files (instead of just the ASL input
and
AML output). Includes listings, hex files, etc.

iASL: Added -G option to the table compiler to allow the compilation of
custom
ACPI tables. The only part of a table that is required is the standard
36-
byte
ACPI header.

AcpiXtract: Ported to the standard ACPICA environment (with ACPICA
headers),
which also adds correct 64-bit support. Also, now all output filenames
are
completely lower case.

AcpiExec: Ignore any non-AML tables (tables other than DSDT or SSDT) when
loading table files. A warning is issued for any such tables. The only
exception is an FADT. This also fixes a possible fault when attempting to
load
non-AML tables. ACPICA BZ 932.

AcpiHelp: Added the AccessAs and Offset operators. Fixed a problem where
a
missing table terminator could cause a fault when using the -p option.

AcpiSrc: Fixed a possible divide-by-zero fault when generating file
statistics.

3) Example Code and Data Size

These are the sizes for the OS-independent acpica.lib produced by the
Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
includes the debug output trace mechanism and has a much larger code and
data
size.

  Previous Release (VC 9.0):
    Non-Debug Version:  90.2K Code, 23.9K Data, 114.1K Total
    Debug Version:     165.6K Code, 68.4K Data, 234.0K Total
  Current Release (VC 9.0):
    Non-Debug Version:  90.2K Code, 23.9K Data, 114.1K Total
    Debug Version:     165.6K Code, 68.4K Data, 234.0K Total


----------------------------------------
23 June 2011. Summary of changes for version 20110623:

1) ACPI CA Core Subsystem:

Updated the predefined name repair mechanism to not attempt repair of a
_TSS
return object if a _PSS object is present. We can only sort the _TSS
return
package if there is no _PSS within the same scope. This is because if
_PSS
is
present, the ACPI specification dictates that the _TSS Power Dissipation
field
is to be ignored, and therefore some BIOSs leave garbage values in the
_TSS
Power field(s). In this case, it is best to just return the _TSS package
as-
is. Reported by, and fixed with assistance from Fenghua Yu.

Added an option to globally disable the control method return value
validation
and repair. This runtime option can be used to disable return value
repair
if
this is causing a problem on a particular machine. Also added an option
to
AcpiExec (-dr) to set this disable flag.

All makefiles and project files: Major changes to improve generation of
ACPICA
tools. ACPICA BZ 912:
    Reduce default optimization levels to improve compatibility
    For Linux, add strict-aliasing=0 for gcc 4
    Cleanup and simplify use of command line defines
    Cleanup multithread library support
    Improve usage messages

Linux-specific header: update handling of THREAD_ID and pthread. For the
32-
bit case, improve casting to eliminate possible warnings, especially with
the
acpica tools.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug
version of the code includes the debug output trace mechanism and has a
much
larger code and data size.

  Previous Release (VC 9.0):
    Non-Debug Version:  90.1K Code, 23.9K Data, 114.0K Total
    Debug Version:     165.6K Code, 68.4K Data, 234.0K Total
  Current Release (VC 9.0):
    Non-Debug Version:  90.2K Code, 23.9K Data, 114.1K Total
    Debug Version:     165.6K Code, 68.4K Data, 234.0K Total

2) iASL Compiler/Disassembler and Tools:

With this release, a new utility named "acpihelp" has been added to the
ACPICA
package. This utility summarizes the ACPI specification chapters for the
ASL
and AML languages. It generates under Linux/Unix as well as Windows, and
provides the following functionality:
    Find/display ASL operator(s) -- with description and syntax.
    Find/display ASL keyword(s) -- with exact spelling and descriptions.
    Find/display ACPI predefined name(s) -- with description, number
        of arguments, and the return value data type.
    Find/display AML opcode name(s) -- with opcode, arguments, and
grammar.
    Decode/display AML opcode -- with opcode name, arguments, and
grammar.

Service Layers: Make multi-thread support configurable. Conditionally
compile
the multi-thread support so that threading libraries will not be linked
if
not
necessary. The only tool that requires multi-thread support is AcpiExec.

iASL: Update yyerrror/AslCompilerError for "const" errors. Newer versions
of
Bison appear to want the interface to yyerror to be a const char * (or at
least this is a problem when generating iASL on some systems.) ACPICA BZ
923
Pierre Lejeune.

Tools: Fix for systems where O_BINARY is not defined. Only used for
Windows
versions of the tools.

----------------------------------------
27 May 2011. Summary of changes for version 20110527:

1) ACPI CA Core Subsystem:

ASL Load() operator: Reinstate most restrictions on the incoming ACPI
table
signature. Now, only allow SSDT, OEMx, and a null signature. History:
    1) Originally, we checked the table signature for "SSDT" or "PSDT".
       (PSDT is now obsolete.)
    2) We added support for OEMx tables, signature "OEM" plus a fourth
       "don't care" character.
    3) Valid tables were encountered with a null signature, so we just
       gave up on validating the signature, (05/2008).
    4) We encountered non-AML tables such as the MADT, which caused
       interpreter errors and kernel faults. So now, we once again allow
       only SSDT, OEMx, and now, also a null signature. (05/2011).

Added the missing _TDL predefined name to the global name list in order
to
enable validation. Affects both the core ACPICA code and the iASL
compiler.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug
version of the code includes the debug output trace mechanism and has a
much
larger code and data size.

  Previous Release (VC 9.0):
    Non-Debug Version:  90.0K Code, 23.8K Data, 113.8K Total
    Debug Version:     164.5K Code, 68.0K Data, 232.5K Total
  Current Release (VC 9.0):
    Non-Debug Version:  90.1K Code, 23.9K Data, 114.0K Total
    Debug Version:     165.6K Code, 68.4K Data, 234.0K Total

2) iASL Compiler/Disassembler and Tools:

Debugger/AcpiExec: Implemented support for "complex" method arguments on
the
debugger command line. This adds support beyond simple integers --
including
Strings, Buffers, and Packages. Includes support for nested packages.
Increased the default command line buffer size to accommodate these
arguments.
See the ACPICA reference for details and syntax. ACPICA BZ 917.

Debugger/AcpiExec: Implemented support for "default" method arguments for
the
Execute/Debug command. Now, the debugger will always invoke a control
method
with the required number of arguments -- even if the command line
specifies
none or insufficient arguments. It uses default integer values for any
missing
arguments. Also fixes a bug where only six method arguments maximum were
supported instead of the required seven.

Debugger/AcpiExec: Add a maximum buffer length parameter to AcpiOsGetLine
and
also return status in order to prevent buffer overruns. See the ACPICA
reference for details and syntax. ACPICA BZ 921

iASL: Cleaned up support for Berkeley yacc. A general cleanup of code and
makefiles to simplify support for the two different but similar parser
generators, bison and yacc.

Updated the generic unix makefile for gcc 4. The default gcc version is
now
expected to be 4 or greater, since options specific to gcc 4 are used.

----------------------------------------
13 April 2011. Summary of changes for version 20110413:

1) ACPI CA Core Subsystem:

Implemented support to execute a so-called "orphan" _REG method under the
EC
device. This change will force the execution of a _REG method underneath
the
EC
device even if there is no corresponding operation region of type
EmbeddedControl. Fixes a problem seen on some machines and apparently is
compatible with Windows behavior. ACPICA BZ 875.

Added more predefined methods that are eligible for automatic NULL
package
element removal. This change adds another group of predefined names to
the
list
of names that can be repaired by having NULL package elements dynamically
removed. This group are those methods that return a single variable-
length
package containing simple data types such as integers, buffers, strings.
This
includes: _ALx, _BCL, _CID,_ DOD, _EDL, _FIX, _PCL, _PLD, _PMD, _PRx,
_PSL,
_Sx,
and _TZD. ACPICA BZ 914.

Split and segregated all internal global lock functions to a new file,
evglock.c.

Updated internal address SpaceID for DataTable regions. Moved this
internal
space
id in preparation for ACPI 5.0 changes that will include some new space
IDs.
This
change should not affect user/host code.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib
produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
version of
the code includes the debug output trace mechanism and has a much larger
code
and
data size.

  Previous Release (VC 9.0):
    Non-Debug Version:  89.8K Code, 23.8K Data, 113.6K Total
    Debug Version:     164.2K Code, 67.9K Data, 232.1K Total
  Current Release (VC 9.0):
    Non-Debug Version:  90.0K Code, 23.8K Data, 113.8K Total
    Debug Version:     164.5K Code, 68.0K Data, 232.5K Total

2) iASL Compiler/Disassembler and Tools:

iASL/DTC: Major update for new grammar features. Allow generic data types
in
custom ACPI tables. Field names are now optional. Any line can be split
to
multiple lines using the continuation char (\). Large buffers now use
line-
continuation character(s) and no colon on the continuation lines. See the
grammar
update in the iASL compiler reference. ACPI BZ 910,911. Lin Ming, Bob
Moore.

iASL: Mark ASL "Return()" and the simple "Return" as "Null" return
statements.
Since the parser stuffs a "zero" as the return value for these statements
(due
to
the underlying AML grammar), they were seen as "return with value" by the
iASL
semantic checking. They are now seen correctly as "null" return
statements.

iASL: Check if a_REG declaration has a corresponding Operation Region.
Adds a
check for each _REG to ensure that there is in fact a corresponding
operation
region declaration in the same scope. If not, the _REG method is not very
useful
since it probably won't be executed. ACPICA BZ 915.

iASL/DTC: Finish support for expression evaluation. Added a new
expression
parser
that implements c-style operator precedence and parenthesization. ACPICA
bugzilla
908.

Disassembler/DTC: Remove support for () and <> style comments in data
tables.
Now
that DTC has full expression support, we don't want to have comment
strings
that
start with a parentheses or a less-than symbol. Now, only the standard /*
and
//
comments are supported, as well as the bracket [] comments.

AcpiXtract: Fix for RSDP and dynamic SSDT extraction. These tables have
"unusual"
headers in the acpidump file. Update the header validation to support
these
tables. Problem introduced in previous AcpiXtract version in the change
to
support "wrong checksum" error messages emitted by acpidump utility.

iASL: Add a * option to generate all template files (as a synonym for
ALL)
as
in
"iasl -T *" or "iasl -T ALL".

iASL/DTC: Do not abort compiler on fatal errors. We do not want to
completely
abort the compiler on "fatal" errors, simply should abort the current
compile.
This allows multiple compiles with a single (possibly wildcard) compiler
invocation.

----------------------------------------
16 March 2011. Summary of changes for version 20110316:

1) ACPI CA Core Subsystem:

Fixed a problem caused by a _PRW method appearing at the namespace root
scope
during the setup of wake GPEs. A fault could occur if a _PRW directly
under
the
root object was passed to the AcpiSetupGpeForWake interface. Lin Ming.

Implemented support for "spurious" Global Lock interrupts. On some
systems, a
global lock interrupt can occur without the pending flag being set. Upon
a
GL
interrupt, we now ensure that a thread is actually waiting for the lock
before
signaling GL availability. Rafael Wysocki, Bob Moore.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib
produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
version of
the code includes the debug output trace mechanism and has a much larger
code
and
data size.

  Previous Release (VC 9.0):
    Non-Debug Version:  89.7K Code, 23.7K Data, 113.4K Total
    Debug Version:     163.9K Code, 67.5K Data, 231.4K Total
  Current Release (VC 9.0):
    Non-Debug Version:  89.8K Code, 23.8K Data, 113.6K Total
    Debug Version:     164.2K Code, 67.9K Data, 232.1K Total

2) iASL Compiler/Disassembler and Tools:

Implemented full support for the "SLIC" ACPI table. Includes support in
the
header files, disassembler, table compiler, and template generator. Bob
Moore,
Lin Ming.

AcpiXtract: Correctly handle embedded comments and messages from
AcpiDump.
Apparently some or all versions of acpidump will occasionally emit a
comment
like
"Wrong checksum", etc., into the dump file. This was causing problems for
AcpiXtract. ACPICA BZ 905.

iASL: Fix the Linux makefile by removing an inadvertent double file
inclusion.
ACPICA BZ 913.

AcpiExec: Update installation of operation region handlers. Install one
handler
for a user-defined address space. This is used by the ASL test suite
(ASLTS).

----------------------------------------
11 February 2011. Summary of changes for version 20110211:

1) ACPI CA Core Subsystem:

Added a mechanism to defer _REG methods for some early-installed
handlers.
Most user handlers should be installed before call to
AcpiEnableSubsystem.
However, Event handlers and region handlers should be installed after
AcpiInitializeObjects. Override handlers for the "default" regions should
be
installed early, however. This change executes all _REG methods for the
default regions (Memory/IO/PCI/DataTable) simultaneously to prevent any
chicken/egg issues between them. ACPICA BZ 848.

Implemented an optimization for GPE detection. This optimization will
simply
ignore GPE registers that contain no enabled GPEs -- there is no need to
read the register since this information is available internally. This
becomes more important on machines with a large GPE space. ACPICA
bugzilla
884. Lin Ming. Suggestion from Joe Liu.

Removed all use of the highly unreliable FADT revision field. The
revision
number in the FADT has been found to be completely unreliable and cannot
be
trusted. Only the actual table length can be used to infer the version.
This
change updates the ACPICA core and the disassembler so that both no
longer
even look at the FADT version and instead depend solely upon the FADT
length.

Fix an unresolved name issue for the no-debug and no-error-message source
generation cases. The _AcpiModuleName was left undefined in these cases,
but
it is actually needed as a parameter to some interfaces. Define
_AcpiModuleName as a null string in these cases. ACPICA Bugzilla 888.

Split several large files (makefiles and project files updated)
  utglobal.c   -> utdecode.c
  dbcomds.c    -> dbmethod.c dbnames.c
  dsopcode.c   -> dsargs.c dscontrol.c
  dsload.c     -> dsload2.c
  aslanalyze.c -> aslbtypes.c aslwalks.c

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release (VC 9.0):
    Non-Debug Version:  89.7K Code, 23.7K Data, 113.4K Total
    Debug Version:     163.9K Code, 67.5K Data, 231.4K Total
  Current Release (VC 9.0):
    Non-Debug Version:  89.7K Code, 23.7K Data, 113.4K Total
    Debug Version:     163.9K Code, 67.5K Data, 231.4K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Implemented the predefined macros __LINE__, __FILE__, and __DATE__.
These are useful C-style macros with the standard definitions. ACPICA
bugzilla 898.

iASL/DTC: Added support for integer expressions and labels. Support for
full
expressions for all integer fields in all ACPI tables. Support for labels
in
"generic" portions of tables such as UEFI. See the iASL reference manual.

Debugger: Added a command to display the status of global handlers. The
"handlers" command will display op region, fixed event, and miscellaneous
global handlers. installation status -- and for op regions, whether
default
or user-installed handler will be used.

iASL: Warn if reserved method incorrectly returns a value. Many
predefined
names are defined such that they do not return a value. If implemented as
a
method, issue a warning if such a name explicitly returns a value. ACPICA
Bugzilla 855.

iASL: Added detection of GPE method name conflicts. Detects a conflict
where
there are two GPE methods of the form _Lxy and _Exy in the same scope.
(For
example, _L1D and _E1D in the same scope.) ACPICA bugzilla 848.

iASL/DTC: Fixed a couple input scanner issues with comments and line
numbers. Comment remover could get confused and miss a comment ending.
Fixed
a problem with line counter maintenance.

iASL/DTC: Reduced the severity of some errors from fatal to error. There
is
no need to abort on simple errors within a field definition.

Debugger: Simplified the output of the help command. All help output now
in
a single screen, instead of help subcommands. ACPICA Bugzilla 897.

----------------------------------------
12 January 2011. Summary of changes for version 20110112:

1) ACPI CA Core Subsystem:

Fixed a race condition between method execution and namespace walks that
can
possibly cause a fault. The problem was apparently introduced in version
20100528 as a result of a performance optimization that reduces the
number
of
namespace walks upon method exit by using the delete_namespace_subtree
function instead of the delete_namespace_by_owner function used
previously.
Bug is a missing namespace lock in the delete_namespace_subtree function.
dana.myers@oracle.com

Fixed several issues and a possible fault with the automatic "serialized"
method support. History: This support changes a method to "serialized" on
the
fly if the method generates an AE_ALREADY_EXISTS error, indicating the
possibility that it cannot handle reentrancy. This fix repairs a couple
of
issues seen in the field, especially on machines with many cores:

    1) Delete method children only upon the exit of the last thread,
       so as to not delete objects out from under other running threads
      (and possibly causing a fault.)
    2) Set the "serialized" bit for the method only upon the exit of the
       Last thread, so as to not cause deadlock when running threads
       attempt to exit.
    3) Cleanup the use of the AML "MethodFlags" and internal method flags
       so that there is no longer any confusion between the two.

    Lin Ming, Bob Moore. Reported by dana.myers@oracle.com.

Debugger: Now lock the namespace for duration of a namespace dump.
Prevents
issues if the namespace is changing dynamically underneath the debugger.
Especially affects temporary namespace nodes, since the debugger displays
these also.

Updated the ordering of include files. The ACPICA headers should appear
before any compiler-specific headers (stdio.h, etc.) so that acenv.h can
set
any necessary compiler-specific defines, etc. Affects the ACPI-related
tools
and utilities.

Updated all ACPICA copyrights and signons to 2011. Added the 2011
copyright
to all module headers and signons, including the Linux header. This
affects
virtually every file in the ACPICA core subsystem, iASL compiler, and all
utilities.

Added project files for MS Visual Studio 2008 (VC++ 9.0). The original
project files for VC++ 6.0 are now obsolete. New project files can be
found
under acpica/generate/msvc9. See acpica/generate/msvc9/readme.txt for
details.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release (VC 6.0):
    Non-Debug Version:  89.8K Code, 18.9K Data, 108.7K Total
    Debug Version:     166.6K Code, 52.1K Data, 218.7K Total
  Current Release (VC 9.0):
    Non-Debug Version:  89.7K Code, 23.7K Data, 113.4K Total
    Debug Version:     163.9K Code, 67.5K Data, 231.4K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Added generic data types to the Data Table compiler. Add "generic"
data
types such as UINT32, String, Unicode, etc., to simplify the generation
of
platform-defined tables such as UEFI. Lin Ming.

iASL: Added listing support for the Data Table Compiler. Adds listing
support
(-l) to display actual binary output for each line of input code.

----------------------------------------
09 December 2010. Summary of changes for version 20101209:

1) ACPI CA Core Subsystem:

Completed the major overhaul of the GPE support code that was begun in
July
2010. Major features include: removal of _PRW execution in ACPICA (host
executes _PRWs anyway), cleanup of "wake" GPE interfaces and processing,
changes to existing interfaces, simplification of GPE handler operation,
and
a handful of new interfaces:

    AcpiUpdateAllGpes
    AcpiFinishGpe
    AcpiSetupGpeForWake
    AcpiSetGpeWakeMask
    One new file, evxfgpe.c to consolidate all external GPE interfaces.

See the ACPICA Programmer Reference for full details and programming
information. See the new section 4.4 "General Purpose Event (GPE)
Support"
for a full overview, and section 8.7 "ACPI General Purpose Event
Management"
for programming details. ACPICA BZ 858,870,877. Matthew Garrett, Lin
Ming,
Bob Moore, Rafael Wysocki.

Implemented a new GPE feature for Windows compatibility, the "Implicit
Wake
GPE Notify". This feature will automatically issue a Notify(2) on a
device
when a Wake GPE is received if there is no corresponding GPE method or
handler. ACPICA BZ 870.

Fixed a problem with the Scope() operator during table parse and load
phase.
During load phase (table load or method execution), the scope operator
should
not enter the target into the namespace. Instead, it should open a new
scope
at the target location. Linux BZ 19462, ACPICA BZ 882.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  89.8K Code, 18.9K Data, 108.7K Total
    Debug Version:     166.6K Code, 52.1K Data, 218.7K Total
  Current Release:
    Non-Debug Version:  89.9K Code, 19.0K Data, 108.9K Total
    Debug Version:     166.3K Code, 52.1K Data, 218.4K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Relax the alphanumeric restriction on _CID strings. These strings
are
"bus-specific" per the ACPI specification, and therefore any characters
are
acceptable. The only checks that can be performed are for a null string
and
perhaps for a leading asterisk. ACPICA BZ 886.

iASL: Fixed a problem where a syntax error that caused a premature EOF
condition on the source file emitted a very confusing error message. The
premature EOF is now detected correctly. ACPICA BZ 891.

Disassembler: Decode the AccessSize within a Generic Address Structure
(byte
access, word access, etc.) Note, this field does not allow arbitrary bit
access, the size is encoded as 1=byte, 2=word, 3=dword, and 4=qword.

New: AcpiNames utility - Example namespace dump utility. Shows an example
of
ACPICA configuration for a minimal namespace dump utility. Uses table and
namespace managers, but no AML interpreter. Does not add any
functionality
over AcpiExec, it is a subset of AcpiExec. The purpose is to show how to
partition and configure ACPICA. ACPICA BZ 883.

AML Debugger: Increased the debugger buffer size for method return
objects.
Was 4K, increased to 16K. Also enhanced error messages for debugger
method
execution, including the buffer overflow case.

----------------------------------------
13 October 2010. Summary of changes for version 20101013:

1) ACPI CA Core Subsystem:

Added support to clear the PCIEXP_WAKE event. When clearing ACPI events,
now
clear the PCIEXP_WAKE_STS bit in the ACPI PM1 Status Register, via
HwClearAcpiStatus. Original change from Colin King. ACPICA BZ 880.

Changed the type of the predefined namespace object _TZ from ThermalZone
to
Device. This was found to be confusing to the host software that
processes
the various thermal zones, since _TZ is not really a ThermalZone.
However,
a
Notify() can still be performed on it. ACPICA BZ 876. Suggestion from Rui
Zhang.

Added Windows Vista SP2 to the list of supported _OSI strings. The actual
string is "Windows 2006 SP2".

Eliminated duplicate code in AcpiUtExecute* functions. Now that the
nsrepair
code automatically repairs _HID-related strings, this type of code is no
longer needed in Execute_HID, Execute_CID, and Execute_UID. ACPICA BZ
878.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  89.9K Code, 19.0K Data, 108.9K Total
    Debug Version:     166.3K Code, 52.1K Data, 218.4K Total
  Current Release:
    Non-Debug Version:  89.9K Code, 19.0K Data, 108.9K Total
    Debug Version:     166.3K Code, 52.1K Data, 218.4K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Implemented additional compile-time validation for _HID strings.
The
non-hex prefix (such as "PNP" or "ACPI") must be uppercase, and the
length
of
the string must be exactly seven or eight characters. For both _HID and
_CID
strings, all characters must be alphanumeric. ACPICA BZ 874.

iASL: Allow certain "null" resource descriptors. Some BIOS code creates
descriptors that are mostly or all zeros, with the expectation that they
will
be filled in at runtime. iASL now allows this as long as there is a
"resource
tag" (name) associated with the descriptor, which gives the ASL a handle
needed to modify the descriptor. ACPICA BZ 873.

Added single-thread support to the generic Unix application OSL.
Primarily
for iASL support, this change removes the use of semaphores in the
single-
threaded ACPICA tools/applications - increasing performance. The
_MULTI_THREADED option was replaced by the (reverse) ACPI_SINGLE_THREADED
option. ACPICA BZ 879.

AcpiExec: several fixes for the 64-bit version. Adds XSDT support and
support
for 64-bit DSDT/FACS addresses in the FADT. Lin Ming.

iASL: Moved all compiler messages to a new file, aslmessages.h.

----------------------------------------
15 September 2010. Summary of changes for version 20100915:

1) ACPI CA Core Subsystem:

Removed the AcpiOsDerivePciId OSL interface. The various host
implementations
of this function were not OS-dependent and are now obsolete and can be
removed from all host OSLs. This function has been replaced by
AcpiHwDerivePciId, which is now part of the ACPICA core code.
AcpiHwDerivePciId has been implemented without recursion. Adds one new
module, hwpci.c. ACPICA BZ 857.

Implemented a dynamic repair for _HID and _CID strings. The following
problems are now repaired at runtime: 1) Remove a leading asterisk in the
string, and 2) the entire string is uppercased. Both repairs are in
accordance with the ACPI specification and will simplify host driver
code.
ACPICA BZ 871.

The ACPI_THREAD_ID type is no longer configurable, internally it is now
always UINT64. This simplifies the ACPICA code, especially any printf
output.
UINT64 is the only common data type for all thread_id types across all
operating systems. It is now up to the host OSL to cast the native
thread_id
type to UINT64 before returning the value to ACPICA (via
AcpiOsGetThreadId).
Lin Ming, Bob Moore.

Added the ACPI_INLINE type to enhance the ACPICA configuration. The
"inline"
keyword is not standard across compilers, and this type allows inline to
be
configured on a per-compiler basis. Lin Ming.

Made the system global AcpiGbl_SystemAwakeAndRunning publically
available.
Added an extern for this boolean in acpixf.h. Some hosts utilize this
value
during suspend/restore operations. ACPICA BZ 869.

All code that implements error/warning messages with the "ACPI:" prefix
has
been moved to a new module, utxferror.c.

The UINT64_OVERLAY was moved to utmath.c, which is the only module where
it
is used. ACPICA BZ 829. Lin Ming, Bob Moore.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  89.1K Code, 19.0K Data, 108.1K Total
    Debug Version:     165.1K Code, 51.9K Data, 217.0K Total
  Current Release:
    Non-Debug Version:  89.9K Code, 19.0K Data, 108.9K Total
    Debug Version:     166.3K Code, 52.1K Data, 218.4K Total

2) iASL Compiler/Disassembler and Tools:

iASL/Disassembler: Write ACPI errors to stderr instead of the output
file.
This keeps the output files free of random error messages that may
originate
from within the namespace/interpreter code. Used this opportunity to
merge
all ACPI:-style messages into a single new module, utxferror.c. ACPICA BZ
866. Lin Ming, Bob Moore.

Tools: update some printfs for ansi warnings on size_t. Handle width
change
of size_t on 32-bit versus 64-bit generations. Lin Ming.

----------------------------------------
06 August 2010. Summary of changes for version 20100806:

1) ACPI CA Core Subsystem:

Designed and implemented a new host interface to the _OSI support code.
This
will allow the host to dynamically add or remove multiple _OSI strings,
as
well as install an optional handler that is called for each _OSI
invocation.
Also added a new AML debugger command, 'osi' to display and modify the
global
_OSI string table, and test support in the AcpiExec utility. See the
ACPICA
reference manual for full details. Lin Ming, Bob Moore. ACPICA BZ 836.
New Functions:
    AcpiInstallInterface - Add an _OSI string.
    AcpiRemoveInterface - Delete an _OSI string.
    AcpiInstallInterfaceHandler - Install optional _OSI handler.
Obsolete Functions:
    AcpiOsValidateInterface - no longer used.
New Files:
    source/components/utilities/utosi.c

Re-introduced the support to enable multi-byte transfers for Embedded
Controller (EC) operation regions. A reported problem was found to be a
bug
in the host OS, not in the multi-byte support. Previously, the maximum
data
size passed to the EC operation region handler was a single byte. There
are
often EC Fields larger than one byte that need to be transferred, and it
is
useful for the EC driver to lock these as a single transaction. This
change
enables single transfers larger than 8 bits. This effectively changes the
access to the EC space from ByteAcc to AnyAcc, and will probably require
changes to the host OS Embedded Controller driver to enable 16/32/64/256-
bit
transfers in addition to 8-bit transfers. Alexey Starikovskiy, Lin Ming.

Fixed a problem with the prototype for AcpiOsReadPciConfiguration. The
prototype in acpiosxf.h had the output value pointer as a (void *).
It should be a (UINT64 *). This may affect some host OSL code.

Fixed a couple problems with the recently modified Linux makefiles for
iASL
and AcpiExec. These new makefiles place the generated object files in the
local directory so that there can be no collisions between the files that
are
shared between them that are compiled with different options.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  88.3K Code, 18.8K Data, 107.1K Total
    Debug Version:     164.0K Code, 51.5K Data, 215.5K Total
  Current Release:
    Non-Debug Version:  89.1K Code, 19.0K Data, 108.1K Total
    Debug Version:     165.1K Code, 51.9K Data, 217.0K Total

2) iASL Compiler/Disassembler and Tools:

iASL/Disassembler: Added a new option (-da, "disassemble all") to load
the
namespace from and disassemble an entire group of AML files. Useful for
loading all of the AML tables for a given machine (DSDT, SSDT1...SSDTn)
and
disassembling with one simple command. ACPICA BZ 865. Lin Ming.

iASL: Allow multiple invocations of -e option. This change allows
multiple
uses of -e on the command line: "-e ssdt1.dat -e ssdt2.dat". ACPICA BZ
834.
Lin Ming.

----------------------------------------
02 July 2010. Summary of changes for version 20100702:

1) ACPI CA Core Subsystem:

Implemented several updates to the recently added GPE reference count
support. The model for "wake" GPEs is changing to give the host OS
complete
control of these GPEs. Eventually, the ACPICA core will not execute any
_PRW
methods, since the host already must execute them. Also, additional
changes
were made to help ensure that the reference counts are kept in proper
synchronization with reality. Rafael J. Wysocki.

1) Ensure that GPEs are not enabled twice during initialization.
2) Ensure that GPE enable masks stay in sync with the reference count.
3) Do not inadvertently enable GPEs when writing GPE registers.
4) Remove the internal wake reference counter and add new AcpiGpeWakeup
interface. This interface will set or clear individual GPEs for wakeup.
5) Remove GpeType argument from AcpiEnable and AcpiDisable. These
interfaces
are now used for "runtime" GPEs only.

Changed the behavior of the GPE install/remove handler interfaces. The
GPE
is
no longer disabled during this process, as it was found to cause problems
on
some machines. Rafael J. Wysocki.

Reverted a change introduced in version 20100528 to enable Embedded
Controller multi-byte transfers. This change was found to cause problems
with
Index Fields and possibly Bank Fields. It will be reintroduced when these
problems have been resolved.

Fixed a problem with references to Alias objects within Package Objects.
A
reference to an Alias within the definition of a Package was not always
resolved properly. Aliases to objects like Processors, Thermal zones,
etc.
were resolved to the actual object instead of a reference to the object
as
it
should be. Package objects are only allowed to contain integer, string,
buffer, package, and reference objects. Redhat bugzilla 608648.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  88.3K Code, 18.8K Data, 107.1K Total
    Debug Version:     164.1K Code, 51.5K Data, 215.6K Total
  Current Release:
    Non-Debug Version:  88.3K Code, 18.8K Data, 107.1K Total
    Debug Version:     164.0K Code, 51.5K Data, 215.5K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Implemented a new compiler subsystem to allow definition and
compilation of the non-AML ACPI tables such as FADT, MADT, SRAT, etc.
These
are called "ACPI Data Tables", and the new compiler is the "Data Table
Compiler". This compiler is intended to simplify the existing error-prone
process of creating these tables for the BIOS, as well as allowing the
disassembly, modification, recompilation, and override of existing ACPI
data
tables. See the iASL User Guide for detailed information.

iASL: Implemented a new Template Generator option in support of the new
Data
Table Compiler. This option will create examples of all known ACPI tables
that can be used as the basis for table development. See the iASL
documentation and the -T option.

Disassembler and headers: Added support for the WDDT ACPI table (Watchdog
Descriptor Table).

Updated the Linux makefiles for iASL and AcpiExec to place the generated
object files in the local directory so that there can be no collisions
between the shared files between them that are generated with different
options.

Added support for Mac OS X in the Unix OSL used for iASL and AcpiExec.
Use
the #define __APPLE__ to enable this support.

----------------------------------------
28 May 2010. Summary of changes for version 20100528:

Note: The ACPI 4.0a specification was released on April 5, 2010 and is
available at www.acpi.info. This is primarily an errata release.

1) ACPI CA Core Subsystem:

Undefined ACPI tables: We are looking for the definitions for the
following
ACPI tables that have been seen in the field: ATKG, IEIT, GSCI.

Implemented support to enable multi-byte transfers for Embedded
Controller
(EC) operation regions. Previously, the maximum data size passed to the
EC
operation region handler was a single byte. There are often EC Fields
larger
than one byte that need to be transferred, and it is useful for the EC
driver
to lock these as a single transaction. This change enables single
transfers
larger than 8 bits. This effectively changes the access to the EC space
from
ByteAcc to AnyAcc, and will probably require changes to the host OS
Embedded
Controller driver to enable 16/32/64/256-bit transfers in addition to 8-
bit
transfers. Alexey Starikovskiy, Lin Ming

Implemented a performance enhancement for namespace search and access.
This
change enhances the performance of namespace searches and walks by adding
a
backpointer to the parent in each namespace node. On large namespaces,
this
change can improve overall ACPI performance by up to 9X. Adding a pointer
to
each namespace node increases the overall size of the internal namespace
by
about 5%, since each namespace entry usually consists of both a namespace
node and an ACPI operand object. However, this is the first growth of the
namespace in ten years. ACPICA bugzilla 817. Alexey Starikovskiy.

Implemented a performance optimization that reduces the number of
namespace
walks. On control method exit, only walk the namespace if the method is
known
to have created namespace objects outside of its local scope. Previously,
the
entire namespace was traversed on each control method exit. This change
can
improve overall ACPI performance by up to 3X. Alexey Starikovskiy, Bob
Moore.

Added support to truncate I/O addresses to 16 bits for Windows
compatibility.
Some ASL code has been seen in the field that inadvertently has bits set
above bit 15. This feature is optional and is enabled if the BIOS
requests
any Windows OSI strings. It can also be enabled by the host OS. Matthew
Garrett, Bob Moore.

Added support to limit the maximum time for the ASL Sleep() operator. To
prevent accidental deep sleeps, limit the maximum time that Sleep() will
actually sleep. Configurable, the default maximum is two seconds. ACPICA
bugzilla 854.

Added run-time validation support for the _WDG and_WED Microsoft
predefined
methods. These objects are defined by "Windows Instrumentation", and are
not
part of the ACPI spec. ACPICA BZ 860.

Expanded all statistic counters used during namespace and device
initialization from 16 to 32 bits in order to support very large
namespaces.

Replaced all instances of %d in printf format specifiers with %u since
nearly
all integers in ACPICA are unsigned.

Fixed the exception namestring for AE_WAKE_ONLY_GPE. Was incorrectly
returned
as AE_NO_HANDLER.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  88.4K Code, 18.8K Data, 107.2K Total
    Debug Version:     164.2K Code, 51.5K Data, 215.7K Total
  Current Release:
    Non-Debug Version:  88.3K Code, 18.8K Data, 107.1K Total
    Debug Version:     164.1K Code, 51.5K Data, 215.6K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Added compiler support for the _WDG and_WED Microsoft predefined
methods. These objects are defined by "Windows Instrumentation", and are
not
part of the ACPI spec. ACPICA BZ 860.

AcpiExec: added option to disable the memory tracking mechanism. The -dt
option will disable the tracking mechanism, which improves performance
considerably.

AcpiExec: Restructured the command line options into -d (disable) and -e
(enable) options.

----------------------------------------
28 April 2010. Summary of changes for version 20100428:

1) ACPI CA Core Subsystem:

Implemented GPE support for dynamically loaded ACPI tables. For all GPEs,
including FADT-based and GPE Block Devices, execute any _PRW methods in
the
new table, and process any _Lxx/_Exx GPE methods in the new table. Any
runtime GPE that is referenced by an _Lxx/_Exx method in the new table is
immediately enabled. Handles the FADT-defined GPEs as well as GPE Block
Devices. Provides compatibility with other ACPI implementations. Two new
files added, evgpeinit.c and evgpeutil.c. ACPICA BZ 833. Lin Ming, Bob
Moore.

Fixed a regression introduced in version 20100331 within the table
manager
where initial table loading could fail. This was introduced in the fix
for
AcpiReallocateRootTable. Also, renamed some of fields in the table
manager
data structures to clarify their meaning and use.

Fixed a possible allocation overrun during internal object copy in
AcpiUtCopySimpleObject. The original code did not correctly handle the
case
where the object to be copied was a namespace node. Lin Ming. ACPICA BZ
847.

Updated the allocation dump routine, AcpiUtDumpAllocation and fixed a
possible access beyond end-of-allocation. Also, now fully validate
descriptor
(size and type) before output. Lin Ming, Bob Moore. ACPICA BZ 847

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  87.9K Code, 18.6K Data, 106.5K Total
    Debug Version:     163.5K Code, 51.3K Data, 214.8K Total
  Current Release:
    Non-Debug Version:  88.4K Code, 18.8K Data, 107.2K Total
    Debug Version:     164.2K Code, 51.5K Data, 215.7K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Implemented Min/Max/Len/Gran validation for address resource
descriptors. This change implements validation for the address fields
that
are common to all address-type resource descriptors. These checks are
implemented: Checks for valid Min/Max, length within the Min/Max window,
valid granularity, Min/Max a multiple of granularity, and _MIF/_MAF as
per
table 6-40 in the ACPI 4.0a specification. Also split the large
aslrestype1.c
and aslrestype2.c files into five new files. ACPICA BZ 840.

iASL: Added support for the _Wxx predefined names. This support was
missing
and these names were not recognized by the compiler as valid predefined
names. ACPICA BZ 851.

iASL: Added an error for all predefined names that are defined to return
no
value and thus must be implemented as Control Methods. These include all
of
the _Lxx, _Exx, _Wxx, and _Qxx names, as well as some other miscellaneous
names such as _DIS, _INI, _IRC, _OFF, _ON, and _PSx. ACPICA BZ 850, 856.

iASL: Implemented the -ts option to emit hex AML data in ASL format, as
an
ASL Buffer. Allows ACPI tables to be easily included within ASL files, to
be
dynamically loaded via the Load() operator. Also cleaned up output for
the
-
ta and -tc options. ACPICA BZ 853.

Tests: Added a new file with examples of extended iASL error checking.
Demonstrates the advanced error checking ability of the iASL compiler.
Available at tests/misc/badcode.asl.

----------------------------------------
31 March 2010. Summary of changes for version 20100331:

1) ACPI CA Core Subsystem:

Completed a major update for the GPE support in order to improve support
for
shared GPEs and to simplify both host OS and ACPICA code. Added a
reference
count mechanism to support shared GPEs that require multiple device
drivers.
Several external interfaces have changed. One external interface has been
removed. One new external interface was added. Most of the GPE external
interfaces now use the GPE spinlock instead of the events mutex (and the
Flags parameter for many GPE interfaces has been removed.) See the
updated
ACPICA Programmer Reference for details. Matthew Garrett, Bob Moore,
Rafael
Wysocki. ACPICA BZ 831.

Changed:
    AcpiEnableGpe, AcpiDisableGpe, AcpiClearGpe, AcpiGetGpeStatus
Removed:
    AcpiSetGpeType
New:
    AcpiSetGpe

Implemented write support for DataTable operation regions. These regions
are
defined via the DataTableRegion() operator. Previously, only read support
was
implemented. The ACPI specification allows DataTableRegions to be
read/write,
however.

Implemented a new subsystem option to force a copy of the DSDT to local
memory. Optionally copy the entire DSDT to local memory (instead of
simply
mapping it.) There are some (albeit very rare) BIOSs that corrupt or
replace
the original DSDT, creating the need for this option. Default is FALSE,
do
not copy the DSDT.

Implemented detection of a corrupted or replaced DSDT. This change adds
support to detect a DSDT that has been corrupted and/or replaced from
outside
the OS (by firmware). This is typically catastrophic for the system, but
has
been seen on some machines. Once this problem has been detected, the DSDT
copy option can be enabled via system configuration. Lin Ming, Bob Moore.

Fixed two problems with AcpiReallocateRootTable during the root table
copy.
When copying the root table to the new allocation, the length used was
incorrect. The new size was used instead of the current table size,
meaning
too much data was copied. Also, the count of available slots for ACPI
tables
was not set correctly. Alexey Starikovskiy, Bob Moore.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  87.5K Code, 18.4K Data, 105.9K Total
    Debug Version:     163.4K Code, 51.1K Data, 214.5K Total
  Current Release:
    Non-Debug Version:  87.9K Code, 18.6K Data, 106.5K Total
    Debug Version:     163.5K Code, 51.3K Data, 214.8K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Implement limited typechecking for values returned from predefined
control methods. The type of any returned static (unnamed) object is now
validated. For example, Return(1). ACPICA BZ 786.

iASL: Fixed a predefined name object verification regression. Fixes a
problem
introduced in version 20100304. An error is incorrectly generated if a
predefined name is declared as a static named object with a value defined
using the keywords "Zero", "One", or "Ones". Lin Ming.

iASL: Added Windows 7 support for the -g option (get local ACPI tables)
by
reducing the requested registry access rights. ACPICA BZ 842.

Disassembler: fixed a possible fault when generating External()
statements.
Introduced in commit ae7d6fd: Properly handle externals with parent-
prefix
(carat). Fixes a string length allocation calculation. Lin Ming.

----------------------------------------
04 March 2010. Summary of changes for version 20100304:

1) ACPI CA Core Subsystem:

Fixed a possible problem with the AML Mutex handling function
AcpiExReleaseMutex where the function could fault under the very rare
condition when the interpreter has blocked, the interpreter lock is
released,
the interpreter is then reentered via the same thread, and attempts to
acquire an AML mutex that was previously acquired. FreeBSD report 140979.
Lin
Ming.

Implemented additional configuration support for the AML "Debug Object".
Output from the debug object can now be enabled via a global variable,
AcpiGbl_EnableAmlDebugObject. This will assist with remote machine
debugging.
This debug output is now available in the release version of ACPICA
instead
of just the debug version. Also, the entire debug output module can now
be
configured out of the ACPICA build if desired. One new file added,
executer/exdebug.c. Lin Ming, Bob Moore.

Added header support for the ACPI MCHI table (Management Controller Host
Interface Table). This table was added in ACPI 4.0, but the defining
document
has only recently become available.

Standardized output of integer values for ACPICA warnings/errors. Always
use
0x prefix for hex output, always use %u for unsigned integer decimal
output.
Affects ACPI_INFO, ACPI_ERROR, ACPI_EXCEPTION, and ACPI_WARNING (about
400
invocations.) These invocations were converted from the original
ACPI_DEBUG_PRINT invocations and were not consistent. ACPICA BZ 835.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  87.1K Code, 18.0K Data, 105.1K Total
    Debug Version:     163.5K Code, 50.9K Data, 214.4K Total
  Current Release:
    Non-Debug Version:  87.5K Code, 18.4K Data, 105.9K Total
    Debug Version:     163.4K Code, 51.1K Data, 214.5K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Implemented typechecking support for static (non-control method)
predefined named objects that are declared with the Name() operator. For
example, the type of this object is now validated to be of type Integer:
Name(_BBN, 1). This change migrates the compiler to using the core
predefined
name table instead of maintaining a local version. Added a new file,
aslpredef.c. ACPICA BZ 832.

Disassembler: Added support for the ACPI 4.0 MCHI table.

----------------------------------------
21 January 2010. Summary of changes for version 20100121:

1) ACPI CA Core Subsystem:

Added the 2010 copyright to all module headers and signons. This affects
virtually every file in the ACPICA core subsystem, the iASL compiler, the
tools/utilities, and the test suites.

Implemented a change to the AcpiGetDevices interface to eliminate
unnecessary
invocations of the _STA method. In the case where a specific _HID is
requested, do not run _STA until a _HID match is found. This eliminates
potentially dozens of _STA calls during a search for a particular
device/HID,
which in turn can improve boot times. ACPICA BZ 828. Lin Ming.

Implemented an additional repair for predefined method return values.
Attempt
to repair unexpected NULL elements within returned Package objects.
Create
an
Integer of value zero, a NULL String, or a zero-length Buffer as
appropriate.
ACPICA BZ 818. Lin Ming, Bob Moore.

Removed the obsolete ACPI_INTEGER data type. This type was introduced as
the
code was migrated from ACPI 1.0 (with 32-bit AML integers) to ACPI 2.0
(with
64-bit AML integers). It is now obsolete and this change removes it from
the
ACPICA code base, replaced by UINT64. The original typedef has been
retained
for now for compatibility with existing device driver code. ACPICA BZ
824.

Removed the unused UINT32_STRUCT type, and the obsolete Integer64 field
in
the parse tree object.

Added additional warning options for the gcc-4 generation. Updated the
source
accordingly. This includes some code restructuring to eliminate
unreachable
code, elimination of some gotos, elimination of unused return values,
some
additional casting, and removal of redundant declarations.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  87.0K Code, 18.0K Data, 105.0K Total
    Debug Version:     163.4K Code, 50.8K Data, 214.2K Total
  Current Release:
    Non-Debug Version:  87.1K Code, 18.0K Data, 105.1K Total
    Debug Version:     163.5K Code, 50.9K Data, 214.4K Total

2) iASL Compiler/Disassembler and Tools:

No functional changes for this release.

----------------------------------------
14 December 2009. Summary of changes for version 20091214:

1) ACPI CA Core Subsystem:

Enhanced automatic data type conversions for predefined name repairs.
This
change expands the automatic repairs/conversions for predefined name
return
values to make Integers, Strings, and Buffers fully interchangeable.
Also,
a
Buffer can be converted to a Package of Integers if necessary. The
nsrepair.c
module was completely restructured. Lin Ming, Bob Moore.

Implemented automatic removal of null package elements during predefined
name
repairs. This change will automatically remove embedded and trailing NULL
package elements from returned package objects that are defined to
contain
a
variable number of sub-packages. The driver is then presented with a
package
with no null elements to deal with. ACPICA BZ 819.

Implemented a repair for the predefined _FDE and _GTM names. The expected
return value for both names is a Buffer of 5 DWORDs. This repair fixes
two
possible problems (both seen in the field), where a package of integers
is
returned, or a buffer of BYTEs is returned. With assistance from Jung-uk
Kim.

Implemented additional module-level code support. This change will
properly
execute module-level code that is not at the root of the namespace (under
a
Device object, etc.). Now executes the code within the current scope
instead
of the root. ACPICA BZ 762. Lin Ming.

Fixed possible mutex acquisition errors when running _REG methods. Fixes
a
problem where mutex errors can occur when running a _REG method that is
in
the same scope as a method-defined operation region or an operation
region
under a module-level IF block. This type of code is rare, so the problem
has
not been seen before. ACPICA BZ 826. Lin Ming, Bob Moore.

Fixed a possible memory leak during module-level code execution. An
object
could be leaked for each block of executed module-level code if the
interpreter slack mode is enabled This change deletes any implicitly
returned
object from the module-level code block. Lin Ming.

Removed messages for successful predefined repair(s). The repair
mechanism
was considered too wordy. Now, messages are only unconditionally emitted
if
the return object cannot be repaired. Existing messages for successful
repairs were converted to ACPI_DEBUG_PRINT messages for now. ACPICA BZ
827.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  86.6K Code, 18.2K Data, 104.8K Total
    Debug Version:     162.7K Code, 50.8K Data, 213.5K Total
  Current Release:
    Non-Debug Version:  87.0K Code, 18.0K Data, 105.0K Total
    Debug Version:     163.4K Code, 50.8K Data, 214.2K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Fixed a regression introduced in 20091112 where intermediate .SRC
files
were no longer automatically removed at the termination of the compile.

acpiexec: Implemented the -f option to specify default region fill value.
This option specifies the value used to initialize buffers that simulate
operation regions. Default value is zero. Useful for debugging problems
that
depend on a specific initial value for a region or field.

----------------------------------------
12 November 2009. Summary of changes for version 20091112:

1) ACPI CA Core Subsystem:

Implemented a post-order callback to AcpiWalkNamespace. The existing
interface only has a pre-order callback. This change adds an additional
parameter for a post-order callback which will be more useful for bus
scans.
ACPICA BZ 779. Lin Ming. Updated the ACPICA Programmer Reference.

Modified the behavior of the operation region memory mapping cache for
SystemMemory. Ensure that the memory mappings created for operation
regions
do not cross 4K page boundaries. Crossing a page boundary while mapping
regions can cause kernel warnings on some hosts if the pages have
different
attributes. Such regions are probably BIOS bugs, and this is the
workaround.
Linux BZ 14445. Lin Ming.

Implemented an automatic repair for predefined methods that must return
sorted lists. This change will repair (by sorting) packages returned by
_ALR,
_PSS, and _TSS. Drivers can now assume that the packages are correctly
sorted
and do not contain NULL package elements. Adds one new file,
namespace/nsrepair2.c. ACPICA BZ 784. Lin Ming, Bob Moore.

Fixed a possible fault during predefined name validation if a return
Package
object contains NULL elements. Also adds a warning if a NULL element is
followed by any non-null elements. ACPICA BZ 813, 814. Future enhancement
may
include repair or removal of all such NULL elements where possible.

Implemented additional module-level executable AML code support. This
change
will execute module-level code that is not at the root of the namespace
(under a Device object, etc.) at table load time. Module-level executable
AML
code has been illegal since ACPI 2.0. ACPICA BZ 762. Lin Ming.

Implemented a new internal function to create Integer objects. This
function
simplifies miscellaneous object creation code. ACPICA BZ 823.

Reduced the severity of predefined repair messages, Warning to Info.
Since
the object was successfully repaired, a warning is too severe. Reduced to
an
info message for now. These messages may eventually be changed to debug-
only.
ACPICA BZ 812.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  85.8K Code, 18.0K Data, 103.8K Total
    Debug Version:     161.8K Code, 50.6K Data, 212.4K Total
  Current Release:
    Non-Debug Version:  86.6K Code, 18.2K Data, 104.8K Total
    Debug Version:     162.7K Code, 50.8K Data, 213.5K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Implemented Switch() with While(1) so that Break works correctly.
This
change correctly implements the Switch operator with a surrounding
While(1)
so that the Break operator works as expected. ACPICA BZ 461. Lin Ming.

iASL: Added a message if a package initializer list is shorter than
package
length. Adds a new remark for a Package() declaration if an initializer
list
exists, but is shorter than the declared length of the package. Although
technically legal, this is probably a coding error and it is seen in the
field. ACPICA BZ 815. Lin Ming, Bob Moore.

iASL: Fixed a problem where the compiler could fault after the maximum
number
of errors was reached (200).

acpixtract: Fixed a possible warning for pointer cast if the compiler
warning
level set very high.

----------------------------------------
13 October 2009. Summary of changes for version 20091013:

1) ACPI CA Core Subsystem:

Fixed a problem where an Operation Region _REG method could be executed
more
than once. If a custom address space handler is installed by the host
before
the "initialize operation regions" phase of the ACPICA initialization,
any
_REG methods for that address space could be executed twice. This change
fixes the problem. ACPICA BZ 427. Lin Ming.

Fixed a possible memory leak for the Scope() ASL operator. When the exact
invocation of "Scope(\)" is executed (change scope to root), one internal
operand object was leaked. Lin Ming.

Implemented a run-time repair for the _MAT predefined method. If the _MAT
return value is defined as a Field object in the AML, and the field
size is less than or equal to the default width of an integer (32 or
64),_MAT
can incorrectly return an Integer instead of a Buffer. ACPICA now
automatically repairs this problem. ACPICA BZ 810.

Implemented a run-time repair for the _BIF and _BIX predefined methods.
The
"OEM Information" field is often incorrectly returned as an Integer with
value zero if the field is not supported by the platform. This is due to
an
ambiguity in the ACPI specification. The field should always be a string.
ACPICA now automatically repairs this problem by returning a NULL string
within the returned Package. ACPICA BZ 807.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  85.6K Code, 18.0K Data, 103.6K Total
    Debug Version:     161.7K Code, 50.9K Data, 212.6K Total
  Current Release:
    Non-Debug Version:  85.8K Code, 18.0K Data, 103.8K Total
    Debug Version:     161.8K Code, 50.6K Data, 212.4K Total

2) iASL Compiler/Disassembler and Tools:

Disassembler: Fixed a problem where references to external symbols that
contained one or more parent-prefixes (carats) were not handled
correctly,
possibly causing a fault. ACPICA BZ 806. Lin Ming.

Disassembler: Restructured the code so that all functions that handle
external symbols are in a single module. One new file is added,
common/dmextern.c.

AML Debugger: Added a max count argument for the Batch command (which
executes multiple predefined methods within the namespace.)

iASL: Updated the compiler documentation (User Reference.) Available at
http://www.acpica.org/documentation/. ACPICA BZ 750.

AcpiXtract: Updated for Lint and other formatting changes. Close all open
files.

----------------------------------------
03 September 2009. Summary of changes for version 20090903:

1) ACPI CA Core Subsystem:

For Windows Vista compatibility, added the automatic execution of an _INI
method located at the namespace root (\_INI). This method is executed at
table load time. This support is in addition to the automatic execution
of
\_SB._INI. Lin Ming.

Fixed a possible memory leak in the interpreter for AML package objects
if
the package initializer list is longer than the defined size of the
package.
This apparently can only happen if the BIOS changes the package size on
the
fly (seen in a _PSS object), as ASL compilers do not allow this. The
interpreter will truncate the package to the defined size (and issue an
error
message), but previously could leave the extra objects undeleted if they
were
pre-created during the argument processing (such is the case if the
package
consists of a number of sub-packages as in the _PSS.) ACPICA BZ 805.

Fixed a problem seen when a Buffer or String is stored to itself via ASL.
This has been reported in the field. Previously, ACPICA would zero out
the
buffer/string. Now, the operation is treated as a noop. Provides Windows
compatibility. ACPICA BZ 803. Lin Ming.

Removed an extraneous error message for ASL constructs of the form
Store(LocalX,LocalX) when LocalX is uninitialized. These curious
statements
are seen in many BIOSs and are once again treated as NOOPs and no error
is
emitted when they are encountered. ACPICA BZ 785.

Fixed an extraneous warning message if a _DSM reserved method returns a
Package object. _DSM can return any type of object, so validation on the
return type cannot be performed. ACPICA BZ 802.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  85.5K Code, 18.0K Data, 103.5K Total
    Debug Version:     161.6K Code, 50.9K Data, 212.5K Total
  Current Release:
    Non-Debug Version:  85.6K Code, 18.0K Data, 103.6K Total
    Debug Version:     161.7K Code, 50.9K Data, 212.6K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Fixed a problem with the use of the Alias operator and Resource
Templates. The correct alias is now constructed and no error is emitted.
ACPICA BZ 738.

iASL: Implemented the -I option to specify additional search directories
for
include files. Allows multiple additional search paths for include files.
Directories are searched in the order specified on the command line
(after
the local directory is searched.) ACPICA BZ 800.

iASL: Fixed a problem where the full pathname for include files was not
emitted for warnings/errors. This caused the IDE support to not work
properly. ACPICA BZ 765.

iASL: Implemented the -@ option to specify a Windows-style response file
containing additional command line options. ACPICA BZ 801.

AcpiExec: Added support to load multiple AML files simultaneously (such
as
a
DSDT and multiple SSDTs). Also added support for wildcards within the AML
pathname. These features allow all machine tables to be easily loaded and
debugged together. ACPICA BZ 804.

Disassembler: Added missing support for disassembly of HEST table Error
Bank
subtables.

----------------------------------------
30 July 2009. Summary of changes for version 20090730:

The ACPI 4.0 implementation for ACPICA is complete with this release.

1) ACPI CA Core Subsystem:

ACPI 4.0: Added header file support for all new and changed ACPI tables.
Completely new tables are: IBFT, IVRS, MSCT, and WAET. Tables that are
new
for ACPI 4.0, but have previously been supported in ACPICA are: CPEP,
BERT,
EINJ, ERST, and HEST. Other newly supported tables are: UEFI and WDAT.
There
have been some ACPI 4.0 changes to other existing tables. Split the large
actbl1.h header into the existing actbl2.h header. ACPICA BZ 774.

ACPI 4.0: Implemented predefined name validation for all new names. There
are
31 new names in ACPI 4.0. The predefined validation module was split into
two
files. The new file is namespace/nsrepair.c. ACPICA BZ 770.

Implemented support for so-called "module-level executable code". This is
executable AML code that exists outside of any control method and is
intended
to be executed at table load time. Although illegal since ACPI 2.0, this
type
of code still exists and is apparently still being created. Blocks of
this
code are now detected and executed as intended. Currently, the code
blocks
must exist under either an If, Else, or While construct; these are the
typical cases seen in the field. ACPICA BZ 762. Lin Ming.

Implemented an automatic dynamic repair for predefined names that return
nested Package objects. This applies to predefined names that are defined
to
return a variable-length Package of sub-packages. If the number of sub-
packages is one, BIOS code is occasionally seen that creates a simple
single
package with no sub-packages. This code attempts to fix the problem by
wrapping a new package object around the existing package. These methods
can
be repaired: _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, and _TSS. ACPICA
BZ
790.

Fixed a regression introduced in 20090625 for the AcpiGetDevices
interface.
The _HID/_CID matching was broken and no longer matched IDs correctly.
ACPICA
BZ 793.

Fixed a problem with AcpiReset where the reset would silently fail if the
register was one of the protected I/O ports. AcpiReset now bypasses the
port
validation mechanism. This may eventually be driven into the
AcpiRead/Write
interfaces.

Fixed a regression related to the recent update of the AcpiRead/Write
interfaces. A sleep/suspend could fail if the optional PM2 Control
register
does not exist during an attempt to write the Bus Master Arbitration bit.
(However, some hosts already delete the code that writes this bit, and
the
code may in fact be obsolete at this date.) ACPICA BZ 799.

Fixed a problem where AcpiTerminate could fault if inadvertently called
twice
in succession. ACPICA BZ 795.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  84.7K Code, 17.8K Data, 102.5K Total
    Debug Version:     160.5K Code, 50.6K Data, 211.1K Total
  Current Release:
    Non-Debug Version:  85.5K Code, 18.0K Data, 103.5K Total
    Debug Version:     161.6K Code, 50.9K Data, 212.5K Total

2) iASL Compiler/Disassembler and Tools:

ACPI 4.0: Implemented disassembler support for all new ACPI tables and
changes to existing tables. ACPICA BZ 775.

----------------------------------------
25 June 2009. Summary of changes for version 20090625:

The ACPI 4.0 Specification was released on June 16 and is available at
www.acpi.info. ACPICA implementation of ACPI 4.0 is underway and will
continue for the next few releases.

1) ACPI CA Core Subsystem:

ACPI 4.0: Implemented interpreter support for the IPMI operation region
address space. Includes support for bi-directional data buffers and an
IPMI
address space handler (to be installed by an IPMI device driver.) ACPICA
BZ
773. Lin Ming.

ACPI 4.0: Added changes for existing ACPI tables - FACS and SRAT.
Includes
support in both the header files and the disassembler.

Completed a major update for the AcpiGetObjectInfo external interface.
Changes include:
 - Support for variable, unlimited length HID, UID, and CID strings.
 - Support Processor objects the same as Devices (HID,UID,CID,ADR,STA,
etc.)
 - Call the _SxW power methods on behalf of a device object.
 - Determine if a device is a PCI root bridge.
 - Change the ACPI_BUFFER parameter to ACPI_DEVICE_INFO.
These changes will require an update to all callers of this interface.
See
the updated ACPICA Programmer Reference for details. One new source file
has
been added - utilities/utids.c. ACPICA BZ 368, 780.

Updated the AcpiRead and AcpiWrite external interfaces to support 64-bit
transfers. The Value parameter has been extended from 32 bits to 64 bits
in
order to support new ACPI 4.0 tables. These changes will require an
update
to
all callers of these interfaces. See the ACPICA Programmer Reference for
details. ACPICA BZ 768.

Fixed several problems with AcpiAttachData. The handler was not invoked
when
the host node was deleted. The data sub-object was not automatically
deleted
when the host node was deleted. The interface to the handler had an
unused
parameter, this was removed. ACPICA BZ 778.

Enhanced the function that dumps ACPI table headers. All non-printable
characters in the string fields are now replaced with '?' (Signature,
OemId,
OemTableId, and CompilerId.) ACPI tables with non-printable characters in
these fields are occasionally seen in the field. ACPICA BZ 788.

Fixed a problem with predefined method repair code where the code that
attempts to repair/convert an object of incorrect type is only executed
on
the first time the predefined method is called. The mechanism that
disables
warnings on subsequent calls was interfering with the repair mechanism.
ACPICA BZ 781.

Fixed a possible memory leak in the predefined validation/repair code
when
a
buffer is automatically converted to an expected string object.

Removed obsolete 16-bit files from the distribution and from the current
git
tree head. ACPICA BZ 776.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  83.4K Code, 17.5K Data, 100.9K Total
    Debug Version:     158.9K Code, 50.0K Data, 208.9K Total
  Current Release:
    Non-Debug Version:  84.7K Code, 17.8K Data, 102.5K Total
    Debug Version:     160.5K Code, 50.6K Data, 211.1K Total

2) iASL Compiler/Disassembler and Tools:

ACPI 4.0: iASL and Disassembler - implemented support for the new IPMI
operation region keyword. ACPICA BZ 771, 772. Lin Ming.

ACPI 4.0: iASL - implemented compile-time validation support for all new
predefined names and control methods (31 total). ACPICA BZ 769.

----------------------------------------
21 May 2009. Summary of changes for version 20090521:

1) ACPI CA Core Subsystem:

Disabled the preservation of the SCI enable bit in the PM1 control
register.
The SCI enable bit (bit 0, SCI_EN) is defined by the ACPI specification
to
be
a "preserved" bit - "OSPM always preserves this bit position", section
4.7.3.2.1. However, some machines fail if this bit is in fact preserved
because the bit needs to be explicitly set by the OS as a workaround. No
machines fail if the bit is not preserved. Therefore, ACPICA no longer
attempts to preserve this bit.

Fixed a problem in AcpiRsGetPciRoutingTableLength where an invalid or
incorrectly formed _PRT package could cause a fault. Added validation to
ensure that each package element is actually a sub-package.

Implemented a new interface to install or override a single control
method,
AcpiInstallMethod. This interface is useful when debugging in order to
repair
an existing method or to install a missing method without having to
override
the entire ACPI table. See the ACPICA Programmer Reference for use and
examples. Lin Ming, Bob Moore.

Fixed several reference count issues with the DdbHandle object that is
created from a Load or LoadTable operator. Prevent premature deletion of
the
object. Also, mark the object as invalid once the table has been
unloaded.
This is needed because the handle itself may not be deleted after the
table
unload, depending on whether it has been stored in a named object by the
caller. Lin Ming.

Fixed a problem with Mutex Sync Levels. Fixed a problem where if multiple
mutexes of the same sync level are acquired but then not released in
strict
opposite order, the internally maintained Current Sync Level becomes
confused
and can cause subsequent execution errors. ACPICA BZ 471.

Changed the allowable release order for ASL mutex objects. The ACPI 4.0
specification has been changed to make the SyncLevel for mutex objects
more
useful. When releasing a mutex, the SyncLevel of the mutex must now be
the
same as the current sync level. This makes more sense than the previous
rule
(SyncLevel less than or equal). This change updates the code to match the
specification.

Fixed a problem with the local version of the AcpiOsPurgeCache function.
The
(local) cache must be locked during all cache object deletions. Andrew
Baumann.

Updated the Load operator to use operation region interfaces. This
replaces
direct memory mapping with region access calls. Now, all region accesses
go
through the installed region handler as they should.

Simplified and optimized the NsGetNextNode function. Reduced parameter
count
and reduced code for this frequently used function.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  82.8K Code, 17.5K Data, 100.3K Total
    Debug Version:     158.0K Code, 49.9K Data, 207.9K Total
  Current Release:
    Non-Debug Version:  83.4K Code, 17.5K Data, 100.9K Total
    Debug Version:     158.9K Code, 50.0K Data, 208.9K Total

2) iASL Compiler/Disassembler and Tools:

Disassembler: Fixed some issues with DMAR, HEST, MADT tables. Some
problems
with sub-table disassembly and handling invalid sub-tables. Attempt
recovery
after an invalid sub-table ID.

----------------------------------------
22 April 2009. Summary of changes for version 20090422:

1) ACPI CA Core Subsystem:

Fixed a compatibility issue with the recently released I/O port
protection
mechanism. For windows compatibility, 1) On a port protection violation,
simply ignore the request and do not return an exception (allow the
control
method to continue execution.) 2) If only part of the request overlaps a
protected port, read/write the individual ports that are not protected.
Linux
BZ 13036. Lin Ming

Enhanced the execution of the ASL/AML BreakPoint operator so that it
actually
breaks into the AML debugger if the debugger is present. This matches the
ACPI-defined behavior.

Fixed several possible warnings related to the use of the configurable
ACPI_THREAD_ID. This type can now be configured as either an integer or a
pointer with no warnings. Also fixes several warnings in printf-like
statements for the 64-bit build when the type is configured as a pointer.
ACPICA BZ 766, 767.

Fixed a number of possible warnings when compiling with gcc 4+ (depending
on
warning options.) Examples include printf formats, aliasing, unused
globals,
missing prototypes, missing switch default statements, use of non-ANSI
library functions, use of non-ANSI constructs. See generate/unix/Makefile
for
a list of warning options used with gcc 3 and 4. ACPICA BZ 735.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  82.6K Code, 17.6K Data, 100.2K Total
    Debug Version:     157.7K Code, 49.9K Data, 207.6K Total
  Current Release:
    Non-Debug Version:  82.8K Code, 17.5K Data, 100.3K Total
    Debug Version:     158.0K Code, 49.9K Data, 207.9K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Fixed a generation warning from Bison 2.3 and fixed several
warnings
on
the 64-bit build.

iASL: Fixed a problem where the Unix/Linux versions of the compiler could
not
correctly digest Windows/DOS formatted files (with CR/LF).

iASL: Added a new option for "quiet mode" (-va) that produces only the
compilation summary, not individual errors and warnings. Useful for large
batch compilations.

AcpiExec: Implemented a new option (-z) to enable a forced
semaphore/mutex
timeout that can be used to detect hang conditions during execution of
AML
code (includes both internal semaphores and AML-defined mutexes and
events.)

Added new makefiles for the generation of acpica in a generic unix-like
environment. These makefiles are intended to generate the acpica tools
and
utilities from the original acpica git source tree structure.

Test Suites: Updated and cleaned up the documentation files. Updated the
copyrights to 2009, affecting all source files. Use the new version of
iASL
with quiet mode. Increased the number of available semaphores in the
Windows
OSL, allowing the aslts to execute fully on Windows. For the Unix OSL,
added
an alternate implementation of the semaphore timeout to allow aslts to
execute fully on Cygwin.

----------------------------------------
20 March 2009. Summary of changes for version 20090320:

1) ACPI CA Core Subsystem:

Fixed a possible race condition between AcpiWalkNamespace and dynamic
table
unloads. Added a reader/writer locking mechanism to allow multiple
concurrent
namespace walks (readers), but block a dynamic table unload until it can
gain
exclusive write access to the namespace. This fixes a problem where a
table
unload could (possibly catastrophically) delete the portion of the
namespace
that is currently being examined by a walk. Adds a new file, utlock.c,
that
implements the reader/writer lock mechanism. ACPICA BZ 749.

Fixed a regression introduced in version 20090220 where a change to the
FADT
handling could cause the ACPICA subsystem to access non-existent I/O
ports.

Modified the handling of FADT register and table (FACS/DSDT) addresses.
The
FADT can contain both 32-bit and 64-bit versions of these addresses.
Previously, the 64-bit versions were favored, meaning that if both 32 and
64
versions were valid, but not equal, the 64-bit version was used. This was
found to cause some machines to fail. Now, in this case, the 32-bit
version
is used instead. This now matches the Windows behavior.

Implemented a new mechanism to protect certain I/O ports. Provides
Microsoft
compatibility and protects the standard PC I/O ports from access via AML
code. Adds a new file, hwvalid.c

Fixed a possible extraneous warning message from the FADT support. The
message warns of a 32/64 length mismatch between the legacy and GAS
definitions for a register.

Removed the obsolete AcpiOsValidateAddress OSL interface. This interface
is
made obsolete by the port protection mechanism above. It was previously
used
to validate the entire address range of an operation region, which could
be
incorrect if the range included illegal ports, but fields within the
operation region did not actually access those ports. Validation is now
performed on a per-field basis instead of the entire region.

Modified the handling of the PM1 Status Register ignored bit (bit 11.)
Ignored bits must be "preserved" according to the ACPI spec. Usually,
this
means a read/modify/write when writing to the register. However, for
status
registers, writing a one means clear the event. Writing a zero means
preserve
the event (do not clear.) This behavior is clarified in the ACPI 4.0
spec,
and the ACPICA code now simply always writes a zero to the ignored bit.

Modified the handling of ignored bits for the PM1 A/B Control Registers.
As
per the ACPI specification, for the control registers, preserve
(read/modify/write) all bits that are defined as either reserved or
ignored.

Updated the handling of write-only bits in the PM1 A/B Control Registers.
When reading the register, zero the write-only bits as per the ACPI spec.
ACPICA BZ 443. Lin Ming.

Removed "Linux" from the list of supported _OSI strings. Linux no longer
wants to reply true to this request. The Windows strings are the only
paths
through the AML that are tested and known to work properly.

  Previous Release:
    Non-Debug Version:  82.0K Code, 17.5K Data,  99.5K Total
    Debug Version:     156.9K Code, 49.8K Data, 206.7K Total
  Current Release:
    Non-Debug Version:  82.6K Code, 17.6K Data, 100.2K Total
    Debug Version:     157.7K Code, 49.9K Data, 207.6K Total

2) iASL Compiler/Disassembler and Tools:

Acpiexec: Split the large aeexec.c file into two new files, aehandlers.c
and
aetables.c

----------------------------------------
20 February 2009. Summary of changes for version 20090220:

1) ACPI CA Core Subsystem:

Optimized the ACPI register locking. Removed locking for reads from the
ACPI
bit registers in PM1 Status, Enable, Control, and PM2 Control. The lock
is
not required when reading the single-bit registers. The
AcpiGetRegisterUnlocked function is no longer needed and has been
removed.
This will improve performance for reads on these registers. ACPICA BZ
760.

Fixed the parameter validation for AcpiRead/Write. Now return
AE_BAD_PARAMETER if the input register pointer is null, and
AE_BAD_ADDRESS
if
the register has an address of zero. Previously, these cases simply
returned
AE_OK. For optional registers such as PM1B status/enable/control, the
caller
should check for a valid register address before calling. ACPICA BZ 748.

Renamed the external ACPI bit register access functions. Renamed
AcpiGetRegister and AcpiSetRegister to clarify the purpose of these
functions. The new names are AcpiReadBitRegister and
AcpiWriteBitRegister.
Also, restructured the code for these functions by simplifying the code
path
and condensing duplicate code to reduce code size.

Added new functions to transparently handle the possibly split PM1 A/B
registers. AcpiHwReadMultiple and AcpiHwWriteMultiple. These two
functions
now handle the split registers for PM1 Status, Enable, and Control.
ACPICA
BZ
746.

Added a function to handle the PM1 control registers,
AcpiHwWritePm1Control.
This function writes both of the PM1 control registers (A/B). These
registers
are different than the PM1 A/B status and enable registers in that
different
values can be written to the A/B registers. Most notably, the SLP_TYP
bits
can be different, as per the values returned from the _Sx predefined
methods.

Removed an extra register write within AcpiHwClearAcpiStatus. This
function
was writing an optional PM1B status register twice. The existing call to
the
low-level AcpiHwRegisterWrite automatically handles a possibly split PM1
A/B
register. ACPICA BZ 751.

Split out the PM1 Status registers from the FADT. Added new globals for
these
registers (A/B), similar to the way the PM1 Enable registers are handled.
Instead of overloading the FADT Event Register blocks. This makes the
code
clearer and less prone to error.

Fixed the warning message for when the platform contains too many ACPI
tables
for the default size of the global root table data structure. The
calculation
for the truncation value was incorrect.

Removed the ACPI_GET_OBJECT_TYPE macro. Removed all instances of this
obsolete macro, since it is now a simple reference to ->common.type.
There
were about 150 invocations of the macro across 41 files. ACPICA BZ 755.

Removed the redundant ACPI_BITREG_SLEEP_TYPE_B. This type is the same as
TYPE_A. Removed this and all related instances. Renamed SLEEP_TYPE_A to
simply SLEEP_TYPE. ACPICA BZ 754.

Conditionally compile the AcpiSetFirmwareWakingVector64 function. This
function is only needed on 64-bit host operating systems and is thus not
included for 32-bit hosts.

Debug output: print the input and result for invocations of the _OSI
reserved
control method via the ACPI_LV_INFO debug level. Also, reduced some of
the
verbosity of this debug level. Len Brown.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  82.3K Code, 17.5K Data,  99.8K Total
    Debug Version:     157.3K Code, 49.8K Data, 207.1K Total
  Current Release:
    Non-Debug Version:  82.0K Code, 17.5K Data,  99.5K Total
    Debug Version:     156.9K Code, 49.8K Data, 206.7K Total

2) iASL Compiler/Disassembler and Tools:

Disassembler: Decode the FADT PM_Profile field. Emit ascii names for the
various legal performance profiles.

----------------------------------------
23 January 2009. Summary of changes for version 20090123:

1) ACPI CA Core Subsystem:

Added the 2009 copyright to all module headers and signons. This affects
virtually every file in the ACPICA core subsystem, the iASL compiler, and
the tools/utilities.

Implemented a change to allow the host to override any ACPI table,
including
dynamically loaded tables. Previously, only the DSDT could be replaced by
the
host. With this change, the AcpiOsTableOverride interface is called for
each
table found in the RSDT/XSDT during ACPICA initialization, and also
whenever
a table is dynamically loaded via the AML Load operator.

Updated FADT flag definitions, especially the Boot Architecture flags.

Debugger: For the Find command, automatically pad the input ACPI name
with
underscores if the name is shorter than 4 characters. This enables a
match
with the actual namespace entry which is itself padded with underscores.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  82.3K Code, 17.4K Data,  99.7K Total
    Debug Version:     157.1K Code, 49.7K Data, 206.8K Total
  Current Release:
    Non-Debug Version:  82.3K Code, 17.5K Data,  99.8K Total
    Debug Version:     157.3K Code, 49.8K Data, 207.1K Total

2) iASL Compiler/Disassembler and Tools:

Fix build error under Bison-2.4.

Dissasembler: Enhanced FADT support. Added decoding of the Boot
Architecture
flags. Now decode all flags, regardless of the FADT version. Flag output
includes the FADT version which first defined each flag.

The iASL -g option now dumps the RSDT to a file (in addition to the FADT
and
DSDT). Windows only.

----------------------------------------
04 December 2008. Summary of changes for version 20081204:

1) ACPI CA Core Subsystem:

The ACPICA Programmer Reference has been completely updated and revamped
for
this release. This includes updates to the external interfaces, OSL
interfaces, the overview sections, and the debugger reference.

Several new ACPICA interfaces have been implemented and documented in the
programmer reference:
AcpiReset - Writes the reset value to the FADT-defined reset register.
AcpiDisableAllGpes - Disable all available GPEs.
AcpiEnableAllRuntimeGpes - Enable all available runtime GPEs.
AcpiGetGpeDevice - Get the GPE block device associated with a GPE.
AcpiGbl_CurrentGpeCount - Tracks the current number of available GPEs.
AcpiRead - Low-level read ACPI register (was HwLowLevelRead.)
AcpiWrite - Low-level write ACPI register (was HwLowLevelWrite.)

Most of the public ACPI hardware-related interfaces have been moved to a
new
file, components/hardware/hwxface.c

Enhanced the FADT parsing and low-level ACPI register access: The ACPI
register lengths within the FADT are now used, and the low level ACPI
register access no longer hardcodes the ACPI register lengths. Given that
there may be some risk in actually trusting the FADT register lengths, a
run-
time option was added to fall back to the default hardcoded lengths if
the
FADT proves to contain incorrect values - UseDefaultRegisterWidths. This
option is set to true for now, and a warning is issued if a suspicious
FADT
register length is overridden with the default value.

Fixed a reference count issue in NsRepairObject. This problem was
introduced
in version 20081031 as part of a fix to repair Buffer objects within
Packages. Lin Ming.

Added semaphore support to the Linux/Unix application OS-services layer
(OSL). ACPICA BZ 448. Lin Ming.

Added the ACPI_MUTEX_TYPE configuration option to select whether mutexes
will
be implemented in the OSL, or will binary semaphores be used instead.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  81.7K Code, 17.3K Data,  99.0K Total
    Debug Version:     156.4K Code, 49.4K Data, 205.8K Total
  Current Release:
    Non-Debug Version:  82.3K Code, 17.4K Data,  99.7K Total
    Debug Version:     157.1K Code, 49.7K Data, 206.8K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Completed the '-e' option to include additional ACPI tables in
order
to
aid with disassembly and External statement generation. ACPICA BZ 742.
Lin
Ming.

iASL: Removed the "named object in while loop" error. The compiler cannot
determine how many times a loop will execute. ACPICA BZ 730.

Disassembler: Implemented support for FADT revision 2 (MS extension).
ACPICA
BZ 743.

Disassembler: Updates for several ACPI data tables (HEST, EINJ, and
MCFG).

----------------------------------------
31 October 2008. Summary of changes for version 20081031:

1) ACPI CA Core Subsystem:

Restructured the ACPICA header files into public/private. acpi.h now
includes
only the "public" acpica headers. All other acpica headers are "private"
and
should not be included by acpica users. One new file, accommon.h is used
to
include the commonly used private headers for acpica code generation.
Future
plans include moving all private headers to a new subdirectory.

Implemented an automatic Buffer->String return value conversion for
predefined ACPI methods. For these methods (such as _BIF), added
automatic
conversion for return objects that are required to be a String, but a
Buffer
was found instead. This can happen when reading string battery data from
an
operation region, because it used to be difficult to convert the data
from
buffer to string from within the ASL. Ensures that the host OS is
provided
with a valid null-terminated string. Linux BZ 11822.

Updated the FACS waking vector interfaces. Split
AcpiSetFirmwareWakingVector
into two: one for the 32-bit vector, another for the 64-bit vector. This
is
required because the host OS must setup the wake much differently for
each
vector (real vs. protected mode, etc.) and the interface itself should
not
be
deciding which vector to use. Also, eliminated the
GetFirmwareWakingVector
interface, as it served no purpose (only the firmware reads the vector,
OS
only writes the vector.) ACPICA BZ 731.

Implemented a mechanism to escape infinite AML While() loops. Added a
loop
counter to force exit from AML While loops if the count becomes too
large.
This can occur in poorly written AML when the hardware does not respond
within a while loop and the loop does not implement a timeout. The
maximum
loop count is configurable. A new exception code is returned when a loop
is
broken, AE_AML_INFINITE_LOOP. Alexey Starikovskiy, Bob Moore.

Optimized the execution of AML While loops. Previously, a control state
object was allocated and freed for each execution of the loop. The
optimization is to simply reuse the control state for each iteration.
This
speeds up the raw loop execution time by about 5%.

Enhanced the implicit return mechanism. For Windows compatibility, return
an
implicit integer of value zero for methods that contain no executable
code.
Such methods are seen in the field as stubs (presumably), and can cause
drivers to fail if they expect a return value. Lin Ming.

Allow multiple backslashes as root prefixes in namepaths. In a fully
qualified namepath, allow multiple backslash prefixes. This can happen
(and
is seen in the field) because of the use of a double-backslash in strings
(since backslash is the escape character) causing confusion. ACPICA BZ
739
Lin Ming.

Emit a warning if two different FACS or DSDT tables are discovered in the
FADT. Checks if there are two valid but different addresses for the FACS
and
DSDT within the FADT (mismatch between the 32-bit and 64-bit fields.)

Consolidated the method argument count validation code. Merged the code
that
validates control method argument counts into the predefined validation
module. Eliminates possible multiple warnings for incorrect argument
counts.

Implemented ACPICA example code. Includes code for ACPICA initialization,
handler installation, and calling a control method. Available at
source/tools/examples.

Added a global pointer for FACS table to simplify internal FACS access.
Use
the global pointer instead of using AcpiGetTableByIndex for each FACS
access.
This simplifies the code for the Global Lock and the Firmware Waking
Vector(s).

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  81.2K Code, 17.0K Data,  98.2K Total
    Debug Version:     155.8K Code, 49.1K Data, 204.9K Total
  Current Release:
    Non-Debug Version:  81.7K Code, 17.3K Data,  99.0K Total
    Debug Version:     156.4K Code, 49.4K Data, 205.8K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Improved disassembly of external method calls. Added the -e option
to
allow the inclusion of additional ACPI tables to help with the
disassembly
of
method invocations and the generation of external declarations during the
disassembly. Certain external method invocations cannot be disassembled
properly without the actual declaration of the method. Use the -e option
to
include the table where the external method(s) are actually declared.
Most
useful for disassembling SSDTs that make method calls back to the master
DSDT. Lin Ming. Example: To disassemble an SSDT with calls to DSDT:  iasl
-d
-e dsdt.aml ssdt1.aml

iASL: Fix to allow references to aliases within ASL namepaths. Fixes a
problem where the use of an alias within a namepath would result in a not
found error or cause the compiler to fault. Also now allows forward
references from the Alias operator itself. ACPICA BZ 738.

----------------------------------------
26 September 2008. Summary of changes for version 20080926:

1) ACPI CA Core Subsystem:

Designed and implemented a mechanism to validate predefined ACPI methods
and
objects. This code validates the predefined ACPI objects (objects whose
names
start with underscore) that appear in the namespace, at the time they are
evaluated. The argument count and the type of the returned object are
validated against the ACPI specification. The purpose of this validation
is
to detect problems with the BIOS-implemented predefined ACPI objects
before
the results are returned to the ACPI-related drivers. Future enhancements
may
include actual repair of incorrect return objects where possible. Two new
files are nspredef.c and acpredef.h.

Fixed a fault in the AML parser if a memory allocation fails during the
Op
completion routine AcpiPsCompleteThisOp. Lin Ming. ACPICA BZ 492.

Fixed an issue with implicit return compatibility. This change improves
the
implicit return mechanism to be more compatible with the MS interpreter.
Lin
Ming, ACPICA BZ 349.

Implemented support for zero-length buffer-to-string conversions. Allow
zero
length strings during interpreter buffer-to-string conversions. For
example,
during the ToDecimalString and ToHexString operators, as well as implicit
conversions. Fiodor Suietov, ACPICA BZ 585.

Fixed two possible memory leaks in the error exit paths of
AcpiUtUpdateObjectReference and AcpiUtWalkPackageTree. These functions
are
similar in that they use a stack of state objects in order to eliminate
recursion. The stack must be fully unwound and deallocated if an error
occurs. Lin Ming. ACPICA BZ 383.

Removed the unused ACPI_BITREG_WAKE_ENABLE definition and entry in the
global
ACPI register table. This bit does not exist and is unused. Lin Ming, Bob
Moore ACPICA BZ 442.

Removed the obsolete version number in module headers. Removed the
"$Revision" number that appeared in each module header. This version
number
was useful under SourceSafe and CVS, but has no meaning under git. It is
not
only incorrect, it could also be misleading.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  79.7K Code, 16.4K Data,  96.1K Total
    Debug Version:     153.7K Code, 48.2K Data, 201.9K Total
  Current Release:
    Non-Debug Version:  81.2K Code, 17.0K Data,  98.2K Total
    Debug Version:     155.8K Code, 49.1K Data, 204.9K Total

----------------------------------------
29 August 2008. Summary of changes for version 20080829:

1) ACPI CA Core Subsystem:

Completed a major cleanup of the internal ACPI_OPERAND_OBJECT of type
Reference. Changes include the elimination of cheating on the Object
field
for the DdbHandle subtype, addition of a reference class field to
differentiate the various reference types (instead of an AML opcode), and
the
cleanup of debug output for this object. Lin Ming, Bob Moore. BZ 723

Reduce an error to a warning for an incorrect method argument count.
Previously aborted with an error if too few arguments were passed to a
control method via the external ACPICA interface. Now issue a warning
instead
and continue. Handles the case where the method inadvertently declares
too
many arguments, but does not actually use the extra ones. Applies mainly
to
the predefined methods. Lin Ming. Linux BZ 11032.

Disallow the evaluation of named object types with no intrinsic value.
Return
AE_TYPE for objects that have no value and therefore evaluation is
undefined:
Device, Event, Mutex, Region, Thermal, and Scope. Previously, evaluation
of
these types were allowed, but an exception would be generated at some
point
during the evaluation. Now, the error is generated up front.

Fixed a possible memory leak in the AcpiNsGetExternalPathname function
(nsnames.c). Fixes a leak in the error exit path.

Removed the obsolete debug levels ACPI_DB_WARN and ACPI_DB_ERROR. These
debug
levels were made obsolete by the ACPI_WARNING, ACPI_ERROR, and
ACPI_EXCEPTION
interfaces. Also added ACPI_DB_EVENTS to correspond with the existing
ACPI_LV_EVENTS.

Removed obsolete and/or unused exception codes from the acexcep.h header.
There is the possibility that certain device drivers may be affected if
they
use any of these exceptions.

The ACPICA documentation has been added to the public git source tree,
under
acpica/documents. Included are the ACPICA programmer reference, the iASL
compiler reference, and the changes.txt release logfile.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  79.7K Code, 16.4K Data,  96.1K Total
    Debug Version:     153.9K Code, 48.4K Data, 202.3K Total
  Current Release:
    Non-Debug Version:  79.7K Code, 16.4K Data,  96.1K Total
    Debug Version:     153.7K Code, 48.2K Data, 201.9K Total

2) iASL Compiler/Disassembler and Tools:

Allow multiple argument counts for the predefined _SCP method. ACPI 3.0
defines _SCP with 3 arguments. Previous versions defined it with only 1
argument. iASL now allows both definitions.

iASL/disassembler: avoid infinite loop on bad ACPI tables. Check for
zero-
length subtables when disassembling ACPI tables. Also fixed a couple of
errors where a full 16-bit table type field was not extracted from the
input
properly.

acpisrc: Improve comment counting mechanism for generating source code
statistics. Count first and last lines of multi-line comments as
whitespace,
not comment lines. Handle Linux legal header in addition to standard
acpica
header.

----------------------------------------

29 July 2008. Summary of changes for version 20080729:

1) ACPI CA Core Subsystem:

Fix a possible deadlock in the GPE dispatch. Remove call to
AcpiHwDisableAllGpes during wake in AcpiEvGpeDispatch. This call will
attempt
to acquire the GPE lock but can deadlock since the GPE lock is already
held
at dispatch time. This code was introduced in version 20060831 as a
response
to Linux BZ 6881 and has since been removed from Linux.

Add a function to dereference returned reference objects. Examines the
return
object from a call to AcpiEvaluateObject. Any Index or RefOf references
are
automatically dereferenced in an attempt to return something useful
(these
reference types cannot be converted into an external ACPI_OBJECT.)
Provides
MS compatibility. Lin Ming, Bob Moore. Linux BZ 11105

x2APIC support: changes for MADT and SRAT ACPI tables. There are 2 new
subtables for the MADT and one new subtable for the SRAT. Includes
disassembler and AcpiSrc support. Data from the Intel 64 Architecture
x2APIC
Specification, June 2008.

Additional error checking for pathname utilities. Add error check after
all
calls to AcpiNsGetPathnameLength. Add status return from
AcpiNsBuildExternalPath and check after all calls. Add parameter
validation
to AcpiUtInitializeBuffer. Reported by and initial patch by Ingo Molnar.

Return status from the global init function AcpiUtGlobalInitialize. This
is
used by both the kernel subsystem and the utilities such as iASL
compiler.
The function could possibly fail when the caches are initialized. Yang
Yi.

Add a function to decode reference object types to strings. Created for
improved error messages.

Improve object conversion error messages. Better error messages during
object
conversion from internal to the external ACPI_OBJECT. Used for external
calls
to AcpiEvaluateObject.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  79.6K Code, 16.2K Data,  95.8K Total
    Debug Version:     153.5K Code, 48.2K Data, 201.7K Total
  Current Release:
    Non-Debug Version:  79.7K Code, 16.4K Data,  96.1K Total
    Debug Version:     153.9K Code, 48.4K Data, 202.3K Total

2) iASL Compiler/Disassembler and Tools:

Debugger: fix a possible hang when evaluating non-methods. Fixes a
problem
introduced in version 20080701. If the object being evaluated (via
execute
command) is not a method, the debugger can hang while trying to obtain
non-
existent parameters.

iASL: relax error for using reserved "_T_x" identifiers. These names can
appear in a disassembled ASL file if they were emitted by the original
compiler. Instead of issuing an error or warning and forcing the user to
manually change these names, issue a remark instead.

iASL: error if named object created in while loop. Emit an error if any
named
object is created within a While loop. If allowed, this code will
generate
a
run-time error on the second iteration of the loop when an attempt is
made
to
create the same named object twice. ACPICA bugzilla 730.

iASL: Support absolute pathnames for include files. Add support for
absolute
pathnames within the Include operator. previously, only relative
pathnames
were supported.

iASL: Enforce minimum 1 interrupt in interrupt macro and Resource
Descriptor.
The ACPI spec requires one interrupt minimum. BZ 423

iASL: Handle a missing ResourceSource arg, with a present SourceIndex.
Handles the case for the Interrupt Resource Descriptor where
the ResourceSource argument is omitted but ResourceSourceIndex
is present. Now leave room for the Index. BZ 426

iASL: Prevent error message if CondRefOf target does not exist. Fixes
cases
where an error message is emitted if the target does not exist. BZ 516

iASL: Fix broken -g option (get Windows ACPI tables). Fixes the -g option
(get ACPI tables on Windows). This was apparently broken in version
20070919.

AcpiXtract: Handle EOF while extracting data. Correctly handle the case
where
the EOF happens immediately after the last table in the input file. Print
completion message. Previously, no message was displayed in this case.

----------------------------------------
01 July 2008. Summary of changes for version 20080701:

0) Git source tree / acpica.org

Fixed a problem where a git-clone from http would not transfer the entire
source tree.

1) ACPI CA Core Subsystem:

Implemented a "careful" GPE disable in AcpiEvDisableGpe, only modify one
enable bit. Now performs a read-change-write of the enable register
instead
of simply writing out the cached enable mask. This will prevent
inadvertent
enabling of GPEs if a rogue GPE is received during initialization (before
GPE
handlers are installed.)

Implemented a copy for dynamically loaded tables. Previously, dynamically
loaded tables were simply mapped - but on some machines this memory is
corrupted after suspend. Now copy the table to a local buffer. For the
OpRegion case, added checksum verify. Use the table length from the table
header, not the region length. For the Buffer case, use the table length
also. Dennis Noordsij, Bob Moore. BZ 10734

Fixed a problem where the same ACPI table could not be dynamically loaded
and
unloaded more than once. Without this change, a table cannot be loaded
again
once it has been loaded/unloaded one time. The current mechanism does not
unregister a table upon an unload. During a load, if the same table is
found,
this no longer returns an exception. BZ 722

Fixed a problem where the wrong descriptor length was calculated for the
EndTag descriptor in 64-bit mode. The "minimal" descriptors such as
EndTag
are calculated as 12 bytes long, but the actual length in the internal
descriptor is 16 because of the round-up to 8 on the 64-bit build.
Reported
by Linn Crosetto. BZ 728

Fixed a possible memory leak in the Unload operator. The DdbHandle
returned
by Load() did not have its reference count decremented during unload,
leading
to a memory leak. Lin Ming. BZ 727

Fixed a possible memory leak when deleting thermal/processor objects. Any
associated notify handlers (and objects) were not being deleted. Fiodor
Suietov. BZ 506

Fixed the ordering of the ASCII names in the global mutex table to match
the
actual mutex IDs. Used by AcpiUtGetMutexName, a function used for debug
only.
Vegard Nossum. BZ 726

Enhanced the AcpiGetObjectInfo interface to return the number of required
arguments if the object is a control method. Added this call to the
debugger
so the proper number of default arguments are passed to a method. This
prevents a warning when executing methods from AcpiExec.

Added a check for an invalid handle in AcpiGetObjectInfo. Return
AE_BAD_PARAMETER if input handle is invalid. BZ 474

Fixed an extraneous warning from exconfig.c on the 64-bit build.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  79.3K Code, 16.2K Data,  95.5K Total
    Debug Version:     153.0K Code, 48.2K Data, 201.2K Total
  Current Release:
    Non-Debug Version:  79.6K Code, 16.2K Data,  95.8K Total
    Debug Version:     153.5K Code, 48.2K Data, 201.7K Total

2) iASL Compiler/Disassembler and Tools:

iASL: Added two missing ACPI reserved names. Added _MTP and _ASZ, both
resource descriptor names.

iASL: Detect invalid ASCII characters in input (windows version). Removed
the
"-CF" flag from the flex compile, enables correct detection of non-ASCII
characters in the input. BZ 441

iASL: Eliminate warning when result of LoadTable is not used. Eliminate
the
"result of operation not used" warning when the DDB handle returned from
LoadTable is not used. The warning is not needed. BZ 590

AcpiExec: Add support for dynamic table load/unload. Now calls _CFG
method
to
pass address of table to the AML. Added option to disable OpRegion
simulation
to allow creation of an OpRegion with a real address that was passed to
_CFG.
All of this allows testing of the Load and Unload operators from
AcpiExec.

Debugger: update tables command for unloaded tables. Handle unloaded
tables
and use the standard table header output routine.

----------------------------------------
09 June 2008. Summary of changes for version 20080609:

1) ACPI CA Core Subsystem:

Implemented a workaround for reversed _PRT entries. A significant number
of
BIOSs erroneously reverse the _PRT SourceName and the SourceIndex. This
change dynamically detects and repairs this problem. Provides
compatibility
with MS ACPI. BZ 6859

Simplified the internal ACPI hardware interfaces to eliminate the locking
flag parameter from Register Read/Write. Added a new external interface,
AcpiGetRegisterUnlocked.

Fixed a problem where the invocation of a GPE control method could hang.
This
was a regression introduced in 20080514. The new method argument count
validation mechanism can enter an infinite loop when a GPE method is
dispatched. Problem fixed by removing the obsolete code that passed GPE
block
information to the notify handler via the control method parameter
pointer.

Fixed a problem where the _SST execution status was incorrectly returned
to
the caller of AcpiEnterSleepStatePrep. This was a regression introduced
in
20080514. _SST is optional and a NOT_FOUND exception should never be
returned. BZ 716

Fixed a problem where a deleted object could be accessed from within the
AML
parser. This was a regression introduced in version 20080123 as a fix for
the
Unload operator. Lin Ming. BZ 10669

Cleaned up the debug operand dump mechanism. Eliminated unnecessary
operands
and eliminated the use of a negative index in a loop. Operands are now
displayed in the correct order, not backwards. This also fixes a
regression
introduced in 20080514 on 64-bit systems where the elimination of
ACPI_NATIVE_UINT caused the negative index to go large and positive. BZ
715

Fixed a possible memory leak in EvPciConfigRegionSetup where the error
exit
path did not delete a locally allocated structure.

Updated definitions for the DMAR and SRAT tables to synchronize with the
current specifications. Includes disassembler support.

Fixed a problem in the mutex debug code (in utmutex.c) where an incorrect
loop termination value was used. Loop terminated on iteration early,
missing
one mutex. Linn Crosetto

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  79.5K Code, 16.2K Data,  95.7K Total
    Debug Version:     153.3K Code, 48.3K Data, 201.6K Total
  Current Release:
    Non-Debug Version:  79.3K Code, 16.2K Data,  95.5K Total
    Debug Version:     153.0K Code, 48.2K Data, 201.2K Total

2) iASL Compiler/Disassembler and Tools:

Disassembler: Implemented support for EisaId() within _CID objects. Now
disassemble integer _CID objects back to EisaId invocations, including
multiple integers within _CID packages. Includes single-step support for
debugger also.

Disassembler: Added support for DMAR and SRAT table definition changes.

----------------------------------------
14 May 2008. Summary of changes for version 20080514:

1) ACPI CA Core Subsystem:

Fixed a problem where GPEs were enabled too early during the ACPICA
initialization. This could lead to "handler not installed" errors on some
machines. Moved GPE enable until after _REG/_STA/_INI methods are run.
This
ensures that all operation regions and devices throughout the namespace
have
been initialized before GPEs are enabled. Alexey Starikovskiy, BZ 9916.

Implemented a change to the enter sleep code. Moved execution of the _GTS
method to just before setting sleep enable bit. The execution was moved
from
AcpiEnterSleepStatePrep to AcpiEnterSleepState. _GTS is now executed
immediately before the SLP_EN bit is set, as per the ACPI specification.
Luming Yu, BZ 1653.

Implemented a fix to disable unknown GPEs (2nd version). Now always
disable
the GPE, even if ACPICA thinks that that it is already disabled. It is
possible that the AML or some other code has enabled the GPE unbeknownst
to
the ACPICA code.

Fixed a problem with the Field operator where zero-length fields would
return
an AE_AML_NO_OPERAND exception during table load. Fix enables zero-length
ASL
field declarations in Field(), BankField(), and IndexField(). BZ 10606.

Implemented a fix for the Load operator, now load the table at the
namespace
root. This reverts a change introduced in version 20071019. The table is
now
loaded at the namespace root even though this goes against the ACPI
specification. This provides compatibility with other ACPI
implementations.
The ACPI specification will be updated to reflect this in ACPI 4.0. Lin
Ming.

Fixed a problem where ACPICA would not Load() tables with unusual
signatures.
Now ignore ACPI table signature for Load() operator. Only "SSDT" is
acceptable to the ACPI spec, but tables are seen with OEMx and null sigs.
Therefore, signature validation is worthless. Apparently MS ACPI accepts
such
signatures, ACPICA must be compatible. BZ 10454.

Fixed a possible negative array index in AcpiUtValidateException. Added
NULL
fields to the exception string arrays to eliminate a -1 subtraction on
the
SubStatus field.

Updated the debug tracking macros to reduce overall code and data size.
Changed ACPI_MODULE_NAME and ACPI_FUNCTION_NAME to use arrays of strings
instead of pointers to static strings. Jan Beulich and Bob Moore.

Implemented argument count checking in control method invocation via
AcpiEvaluateObject. Now emit an error if too few arguments, warning if
too
many. This applies only to extern programmatic control method execution,
not
method-to-method calls within the AML. Lin Ming.

Eliminated the ACPI_NATIVE_UINT type across all ACPICA code. This type is
no
longer needed, especially with the removal of 16-bit support. It was
replaced
mostly with UINT32, but also ACPI_SIZE where a type that changes 32/64
bit
on
32/64-bit platforms is required.

Added the C const qualifier for appropriate string constants -- mostly
MODULE_NAME and printf format strings. Jan Beulich.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has a
much larger code and data size.

  Previous Release:
    Non-Debug Version:  80.0K Code, 17.4K Data,  97.4K Total
    Debug Version:     159.4K Code, 64.4K Data, 223.8K Total
  Current Release:
    Non-Debug Version:  79.5K Code, 16.2K Data,  95.7K Total
    Debug Version:     153.3K Code, 48.3K Data, 201.6K Total

2) iASL Compiler/Disassembler and Tools:

Implemented ACPI table revision ID validation in the disassembler. Zero
is
always invalid. For DSDTs, the ID controls the interpreter integer width.
1
means 32-bit and this is unusual. 2 or greater is 64-bit.

----------------------------------------
21 March 2008. Summary of changes for version 20080321:

1) ACPI CA Core Subsystem:

Implemented an additional change to the GPE support in order to suppress
spurious or stray GPEs. The AcpiEvDisableGpe function will now
permanently
disable incoming GPEs that are neither enabled nor disabled -- meaning
that
the GPE is unknown to the system. This should prevent future interrupt
floods
from that GPE. BZ 6217 (Zhang Rui)

Fixed a problem where NULL package elements were not returned to the
AcpiEvaluateObject interface correctly. The element was simply ignored
instead of returning a NULL ACPI_OBJECT package element, potentially
causing
a buffer overflow and/or confusing the caller who expected a fixed number
of
elements. BZ 10132 (Lin Ming, Bob Moore)

Fixed a problem with the CreateField, CreateXXXField (Bit, Byte, Word,
Dword,
Qword), Field, BankField, and IndexField operators when invoked from
inside
an executing control method. In this case, these operators created
namespace
nodes that were incorrectly left marked as permanent nodes instead of
temporary nodes. This could cause a problem if there is race condition
between an exiting control method and a running namespace walk. (Reported
by
Linn Crosetto)

Fixed a problem where the CreateField and CreateXXXField operators would
incorrectly allow duplicate names (the name of the field) with no
exception
generated.

Implemented several changes for Notify handling. Added support for new
Notify
values (ACPI 2.0+) and improved the Notify debug output. Notify on
PowerResource objects is no longer allowed, as per the ACPI
specification.
(Bob Moore, Zhang Rui)

All Reference Objects returned via the AcpiEvaluateObject interface are
now
marked as type "REFERENCE" instead of "ANY". The type ANY is now reserved
for
NULL objects - either NULL package elements or unresolved named
references.

Fixed a problem where an extraneous debug message was produced for
package
objects (when debugging enabled). The message "Package List length larger
than NumElements count" is now produced in the correct case, and is now
an
error message rather than a debug message. Added a debug message for the
opposite case, where NumElements is larger than the Package List (the
package
will be padded out with NULL elements as per the ACPI spec.)

Implemented several improvements for the output of the ASL "Debug" object
to
clarify and keep all data for a given object on one output line.

Fixed two size calculation issues with the variable-length Start
Dependent
resource descriptor.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release:
    Non-Debug Version:  79.7K Code, 17.3K Data,  97.0K Total
    Debug Version:     158.9K Code, 64.0K Data, 222.9K Total
  Current Release:
    Non-Debug Version:  80.0K Code, 17.4K Data,  97.4K Total
    Debug Version:     159.4K Code, 64.4K Data, 223.8K Total

2) iASL Compiler/Disassembler and Tools:

Fixed a problem with the use of the Switch operator where execution of
the
containing method by multiple concurrent threads could cause an
AE_ALREADY_EXISTS exception. This is caused by the fact that there is no
actual Switch opcode, it must be simulated with local named temporary
variables and if/else pairs. The solution chosen was to mark any method
that
uses Switch as Serialized, thus preventing multiple thread entries. BZ
469.

----------------------------------------
13 February 2008. Summary of changes for version 20080213:

1) ACPI CA Core Subsystem:

Implemented another MS compatibility design change for GPE/Notify
handling.
GPEs are now cleared/enabled asynchronously to allow all pending notifies
to
complete first. It is expected that the OSL will queue the enable request
behind all pending notify requests (may require changes to the local host
OSL
in AcpiOsExecute). Alexey Starikovskiy.

Fixed a problem where buffer and package objects passed as arguments to a
control method via the external AcpiEvaluateObject interface could cause
an
AE_AML_INTERNAL exception depending on the order and type of operators
executed by the target control method.

Fixed a problem where resource descriptor size optimization could cause a
problem when a _CRS resource template is passed to a _SRS method. The
_SRS
resource template must use the same descriptors (with the same size) as
returned from _CRS. This change affects the following resource
descriptors:
IRQ / IRQNoFlags and StartDependendentFn / StartDependentFnNoPri. (BZ
9487)

Fixed a problem where a CopyObject to RegionField, BankField, and
IndexField
objects did not perform an implicit conversion as it should. These types
must
retain their initial type permanently as per the ACPI specification.
However,
a CopyObject to all other object types should not perform an implicit
conversion, as per the ACPI specification. (Lin Ming, Bob Moore) BZ 388

Fixed a problem with the AcpiGetDevices interface where the mechanism to
match device CIDs did not examine the entire list of available CIDs, but
instead aborted on the first non-matching CID. Andrew Patterson.

Fixed a regression introduced in version 20071114. The ACPI_HIDWORD macro
was
inadvertently changed to return a 16-bit value instead of a 32-bit value,
truncating the upper dword of a 64-bit value. This macro is only used to
display debug output, so no incorrect calculations were made. Also,
reimplemented the macro so that a 64-bit shift is not performed by
inefficient compilers.

Added missing va_end statements that should correspond with each va_start
statement.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release:
    Non-Debug Version:  79.5K Code, 17.2K Data,  96.7K Total
    Debug Version:     159.0K Code, 63.8K Data, 222.8K Total
  Current Release:
    Non-Debug Version:  79.7K Code, 17.3K Data,  97.0K Total
    Debug Version:     158.9K Code, 64.0K Data, 222.9K Total

2) iASL Compiler/Disassembler and Tools:

Implemented full disassembler support for the following new ACPI tables:
BERT, EINJ, and ERST. Implemented partial disassembler support for the
complicated HEST table. These tables support the Windows Hardware Error
Architecture (WHEA).

----------------------------------------
23 January 2008. Summary of changes for version 20080123:

1) ACPI CA Core Subsystem:

Added the 2008 copyright to all module headers and signons. This affects
virtually every file in the ACPICA core subsystem, the iASL compiler, and
the tools/utilities.

Fixed a problem with the SizeOf operator when used with Package and
Buffer
objects. These objects have deferred execution for some arguments, and
the
execution is now completed before the SizeOf is executed. This problem
caused
unexpected AE_PACKAGE_LIMIT errors on some systems (Lin Ming, Bob Moore)
BZ
9558

Implemented an enhancement to the interpreter "slack mode". In the
absence
of
an explicit return or an implicitly returned object from the last
executed
opcode, a control method will now implicitly return an integer of value 0
for
Microsoft compatibility. (Lin Ming) BZ 392

Fixed a problem with the Load operator where an exception was not
returned
in
the case where the table is already loaded. (Lin Ming) BZ 463

Implemented support for the use of DDBHandles as an Indexed Reference, as
per
the ACPI spec. (Lin Ming) BZ 486

Implemented support for UserTerm (Method invocation) for the Unload
operator
as per the ACPI spec. (Lin Ming) BZ 580

Fixed a problem with the LoadTable operator where the OemId and
OemTableId
input strings could cause unexpected failures if they were shorter than
the
maximum lengths allowed. (Lin Ming, Bob Moore) BZ 576

Implemented support for UserTerm (Method invocation) for the Unload
operator
as per the ACPI spec. (Lin Ming) BZ 580

Implemented header file support for new ACPI tables - BERT, ERST, EINJ,
HEST,
IBFT, UEFI, WDAT. Disassembler support is forthcoming.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release:
    Non-Debug Version:  79.3K Code, 17.2K Data,  96.5K Total
    Debug Version:     158.6K Code, 63.8K Data, 222.4K Total
  Current Release:
    Non-Debug Version:  79.5K Code, 17.2K Data,  96.7K Total
    Debug Version:     159.0K Code, 63.8K Data, 222.8K Total

2) iASL Compiler/Disassembler and Tools:

Implemented support in the disassembler for checksum validation on
incoming
binary DSDTs and SSDTs. If incorrect, a message is displayed within the
table
header dump at the start of the disassembly.

Implemented additional debugging information in the namespace listing
file
created during compilation. In addition to the namespace hierarchy, the
full
pathname to each namespace object is displayed.

Fixed a problem with the disassembler where invalid ACPI tables could
cause
faults or infinite loops.

Fixed an unexpected parse error when using the optional "parameter types"
list in a control method declaration. (Lin Ming) BZ 397

Fixed a problem where two External declarations with the same name did
not
cause an error (Lin Ming) BZ 509

Implemented support for full TermArgs (adding Argx, Localx and method
invocation) for the ParameterData parameter to the LoadTable operator.
(Lin
Ming) BZ 583,587

----------------------------------------
19 December 2007. Summary of changes for version 20071219:

1) ACPI CA Core Subsystem:

Implemented full support for deferred execution for the TermArg string
arguments for DataTableRegion. This enables forward references and full
operand resolution for the three string arguments. Similar to
OperationRegion
deferred argument execution.) Lin Ming. BZ 430

Implemented full argument resolution support for the BankValue argument
to
BankField. Previously, only constants were supported, now any TermArg may
be
used. Lin Ming BZ 387, 393

Fixed a problem with AcpiGetDevices where the search of a branch of the
device tree could be terminated prematurely. In accordance with the ACPI
specification, the search down the current branch is terminated if a
device
is both not present and not functional (instead of just not present.)
Yakui
Zhao.

Fixed a problem where "unknown" GPEs could be allowed to fire repeatedly
if
the underlying AML code changed the GPE enable registers. Now, any
unknown
incoming GPE (no _Lxx/_Exx method and not the EC GPE) is immediately
disabled
instead of simply ignored. Rui Zhang.

Fixed a problem with Index Fields where the Index register was
incorrectly
limited to a maximum of 32 bits. Now any size may be used.

Fixed a couple memory leaks associated with "implicit return" objects
when
the AML Interpreter slack mode is enabled. Lin Ming BZ 349

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release:
    Non-Debug Version:  79.0K Code, 17.2K Data,  96.2K Total
    Debug Version:     157.9K Code, 63.6K Data, 221.5K Total
  Current Release:
    Non-Debug Version:  79.3K Code, 17.2K Data,  96.5K Total
    Debug Version:     158.6K Code, 63.8K Data, 222.4K Total

----------------------------------------
14 November 2007. Summary of changes for version 20071114:

1) ACPI CA Core Subsystem:

Implemented event counters for each of the Fixed Events, the ACPI SCI
(interrupt) itself, and control methods executed. Named
AcpiFixedEventCount[], AcpiSciCount, and AcpiMethodCount respectively.
These
should be useful for debugging and statistics.

Implemented a new external interface, AcpiGetStatistics, to retrieve the
contents of the various event counters. Returns the current values for
AcpiSciCount, AcpiGpeCount, the AcpiFixedEventCount array, and
AcpiMethodCount. The interface can be expanded in the future if new
counters
are added. Device drivers should use this interface rather than access
the
counters directly.

Fixed a problem with the FromBCD and ToBCD operators. With some
compilers,
the ShortDivide function worked incorrectly, causing problems with the
BCD
functions with large input values. A truncation from 64-bit to 32-bit
inadvertently occurred. Internal BZ 435. Lin Ming

Fixed a problem with Index references passed as method arguments.
References
passed as arguments to control methods were dereferenced immediately
(before
control was passed to the called method). The references are now
correctly
passed directly to the called method. BZ 5389. Lin Ming

Fixed a problem with CopyObject used in conjunction with the Index
operator.
The reference was incorrectly dereferenced before the copy. The reference
is
now correctly copied. BZ 5391. Lin Ming

Fixed a problem with Control Method references within Package objects.
These
references are now correctly generated. This completes the package
construction overhaul that began in version 20071019.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release:
    Non-Debug Version:  78.8K Code, 17.2K Data,  96.0K Total
    Debug Version:     157.2K Code, 63.4K Data, 220.6K Total
  Current Release:
    Non-Debug Version:  79.0K Code, 17.2K Data,  96.2K Total
    Debug Version:     157.9K Code, 63.6K Data, 221.5K Total


2) iASL Compiler/Disassembler and Tools:

The AcpiExec utility now installs handlers for all of the predefined
Operation Region types. New types supported are: PCI_Config, CMOS, and
PCIBARTarget.

Fixed a problem with the 64-bit version of AcpiExec where the extended
(64-
bit) address fields for the DSDT and FACS within the FADT were not being
used, causing truncation of the upper 32-bits of these addresses. Lin
Ming
and Bob Moore

----------------------------------------
19 October 2007. Summary of changes for version 20071019:

1) ACPI CA Core Subsystem:

Fixed a problem with the Alias operator when the target of the alias is a
named ASL operator that opens a new scope -- Scope, Device,
PowerResource,
Processor, and ThermalZone. In these cases, any children of the original
operator could not be accessed via the alias, potentially causing
unexpected
AE_NOT_FOUND exceptions. (BZ 9067)

Fixed a problem with the Package operator where all named references were
created as object references and left otherwise unresolved. According to
the
ACPI specification, a Package can only contain Data Objects or references
to
control methods. The implication is that named references to Data Objects
(Integer, Buffer, String, Package, BufferField, Field) should be resolved
immediately upon package creation. This is the approach taken with this
change. References to all other named objects (Methods, Devices, Scopes,
etc.) are all now properly created as reference objects. (BZ 5328)

Reverted a change to Notify handling that was introduced in version
20070508. This version changed the Notify handling from asynchronous to
fully synchronous (Device driver Notify handling with respect to the
Notify
ASL operator). It was found that this change caused more problems than it
solved and was removed by most users.

Fixed a problem with the Increment and Decrement operators where the type
of
the target object could be unexpectedly and incorrectly changed. (BZ 353)
Lin Ming.

Fixed a problem with the Load and LoadTable operators where the table
location within the namespace was ignored. Instead, the table was always
loaded into the root or current scope. Lin Ming.

Fixed a problem with the Load operator when loading a table from a buffer
object. The input buffer was prematurely zeroed and/or deleted. (BZ 577)

Fixed a problem with the Debug object where a store of a DdbHandle
reference
object to the Debug object could cause a fault.

Added a table checksum verification for the Load operator, in the case
where
the load is from a buffer. (BZ 578).

Implemented additional parameter validation for the LoadTable operator.
The
length of the input strings SignatureString, OemIdString, and OemTableId
are
now checked for maximum lengths. (BZ 582) Lin Ming.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release:
    Non-Debug Version:  78.5K Code, 17.1K Data,  95.6K Total
    Debug Version:     156.7K Code, 63.2K Data, 219.9K Total
  Current Release:
    Non-Debug Version:  78.8K Code, 17.2K Data,  96.0K Total
    Debug Version:     157.2K Code, 63.4K Data, 220.6K Total


2) iASL Compiler/Disassembler:

Fixed a problem where if a single file was specified and the file did not
exist, no error message was emitted. (Introduced with wildcard support in
version 20070917.)

----------------------------------------
19 September 2007. Summary of changes for version 20070919:

1) ACPI CA Core Subsystem:

Designed and implemented new external interfaces to install and remove
handlers for ACPI table-related events. Current events that are defined
are
LOAD and UNLOAD. These interfaces allow the host to track ACPI tables as
they are dynamically loaded and unloaded. See AcpiInstallTableHandler and
AcpiRemoveTableHandler. (Lin Ming and Bob Moore)

Fixed a problem where the use of the AcpiGbl_AllMethodsSerialized flag
(acpi_serialized option on Linux) could cause some systems to hang during
initialization. (Bob Moore) BZ 8171

Fixed a problem where objects of certain types (Device, ThermalZone,
Processor, PowerResource) can be not found if they are declared and
referenced from within the same control method (Lin Ming) BZ 341

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release:
    Non-Debug Version:  78.3K Code, 17.0K Data,  95.3K Total
    Debug Version:     156.3K Code, 63.1K Data, 219.4K Total
  Current Release:
    Non-Debug Version:  78.5K Code, 17.1K Data,  95.6K Total
    Debug Version:     156.7K Code, 63.2K Data, 219.9K Total


2) iASL Compiler/Disassembler:

Implemented support to allow multiple files to be compiled/disassembled
in
a
single invocation. This includes command line wildcard support for both
the
Windows and Unix versions of the compiler. This feature simplifies the
disassembly and compilation of multiple ACPI tables in a single
directory.

----------------------------------------
08 May 2007. Summary of changes for version 20070508:

1) ACPI CA Core Subsystem:

Implemented a Microsoft compatibility design change for the handling of
the
Notify AML operator. Previously, notify handlers were dispatched and
executed completely asynchronously in a deferred thread. The new design
still executes the notify handlers in a different thread, but the
original
thread that executed the Notify() now waits at a synchronization point
for
the notify handler to complete. Some machines depend on a synchronous
Notify
operator in order to operate correctly.

Implemented support to allow Package objects to be passed as method
arguments to the external AcpiEvaluateObject interface. Previously, this
would return the AE_NOT_IMPLEMENTED exception. This feature had not been
implemented since there were no reserved control methods that required it
until recently.

Fixed a problem with the internal FADT conversion where ACPI 1.0 FADTs
that
contained invalid non-zero values in reserved fields could cause later
failures because these fields have meaning in later revisions of the
FADT.
For incoming ACPI 1.0 FADTs, these fields are now always zeroed. (The
fields
are: Preferred_PM_Profile, PSTATE_CNT, CST_CNT, and IAPC_BOOT_FLAGS.)

Fixed a problem where the Global Lock handle was not properly updated if
a
thread that acquired the Global Lock via executing AML code then
attempted
to acquire the lock via the AcpiAcquireGlobalLock interface. Reported by
Joe
Liu.

Fixed a problem in AcpiEvDeleteGpeXrupt where the global interrupt list
could be corrupted if the interrupt being removed was at the head of the
list. Reported by Linn Crosetto.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release:
    Non-Debug Version:  78.0K Code, 17.1K Data,  95.1K Total
    Debug Version:     155.9K Code, 63.1K Data, 219.0K Total
  Current Release:
    Non-Debug Version:  78.3K Code, 17.0K Data,  95.3K Total
    Debug Version:     156.3K Code, 63.1K Data, 219.4K Total

----------------------------------------
20 March 2007. Summary of changes for version 20070320:

1) ACPI CA Core Subsystem:

Implemented a change to the order of interpretation and evaluation of AML
operand objects within the AML interpreter. The interpreter now evaluates
operands in the order that they appear in the AML stream (and the
corresponding ASL code), instead of in the reverse order (after the
entire
operand list has been parsed). The previous behavior caused several
subtle
incompatibilities with the Microsoft AML interpreter as well as being
somewhat non-intuitive. BZ 7871, local BZ 263. Valery Podrezov.

Implemented a change to the ACPI Global Lock support. All interfaces to
the
global lock now allow the same thread to acquire the lock multiple times.
This affects the AcpiAcquireGlobalLock external interface to the global
lock
as well as the internal use of the global lock to support AML fields -- a
control method that is holding the global lock can now simultaneously
access
AML fields that require global lock protection. Previously, in both
cases,
this would have resulted in an AE_ALREADY_ACQUIRED exception. The change
to
AcpiAcquireGlobalLock is of special interest to drivers for the Embedded
Controller. There is no change to the behavior of the AML Acquire
operator,
as this can already be used to acquire a mutex multiple times by the same
thread. BZ 8066. With assistance from Alexey Starikovskiy.

Fixed a problem where invalid objects could be referenced in the AML
Interpreter after error conditions. During operand evaluation, ensure
that
the internal "Return Object" field is cleared on error and only valid
pointers are stored there. Caused occasional access to deleted objects
that
resulted in "large reference count" warning messages. Valery Podrezov.

Fixed a problem where an AE_STACK_OVERFLOW internal exception could occur
on
deeply nested control method invocations. BZ 7873, local BZ 487. Valery
Podrezov.

Fixed an internal problem with the handling of result objects on the
interpreter result stack. BZ 7872. Valery Podrezov.

Removed obsolete code that handled the case where AML_NAME_OP is the
target
of a reference (Reference.Opcode). This code was no longer necessary. BZ
7874. Valery Podrezov.

Removed obsolete ACPI_NO_INTEGER64_SUPPORT from two header files. This
was
a
remnant from the previously discontinued 16-bit support.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release:
    Non-Debug Version:  78.0K Code, 17.1K Data,  95.1K Total
    Debug Version:     155.8K Code, 63.3K Data, 219.1K Total
  Current Release:
    Non-Debug Version:  78.0K Code, 17.1K Data,  95.1K Total
    Debug Version:     155.9K Code, 63.1K Data, 219.0K Total

----------------------------------------
26 January 2007. Summary of changes for version 20070126:

1) ACPI CA Core Subsystem:

Added the 2007 copyright to all module headers and signons. This affects
virtually every file in the ACPICA core subsystem, the iASL compiler, and
the utilities.

Implemented a fix for an incorrect parameter passed to AcpiTbDeleteTable
during a table load. A bad pointer was passed in the case where the DSDT
is
overridden, causing a fault in this case.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release:
    Non-Debug Version:  78.0K Code, 17.1K Data,  95.1K Total
    Debug Version:     155.8K Code, 63.3K Data, 219.1K Total
  Current Release:
    Non-Debug Version:  78.0K Code, 17.1K Data,  95.1K Total
    Debug Version:     155.8K Code, 63.3K Data, 219.1K Total

----------------------------------------
15 December 2006. Summary of changes for version 20061215:

1) ACPI CA Core Subsystem:

Support for 16-bit ACPICA has been completely removed since it is no
longer
necessary and it clutters the code. All 16-bit macros, types, and
conditional compiles have been removed, cleaning up and simplifying the
code
across the entire subsystem. DOS support is no longer needed since the
bootable Linux firmware kit is now available.

The handler for the Global Lock is now removed during AcpiTerminate to
enable a clean subsystem restart, via the implementation of the
AcpiEvRemoveGlobalLockHandler function. (With assistance from Joel Bretz,
HP)

Implemented enhancements to the multithreading support within the
debugger
to enable improved multithreading debugging and evaluation of the
subsystem.
(Valery Podrezov)

Debugger: Enhanced the Statistics/Memory command to emit the total
(maximum)
memory used during the execution, as well as the maximum memory consumed
by
each of the various object types. (Valery Podrezov)

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release:
    Non-Debug Version:  77.9K Code, 17.0K Data,  94.9K Total
    Debug Version:     155.2K Code, 63.1K Data, 218.3K Total
  Current Release:
    Non-Debug Version:  78.0K Code, 17.1K Data,  95.1K Total
    Debug Version:     155.8K Code, 63.3K Data, 219.1K Total


2) iASL Compiler/Disassembler and Tools:

AcpiExec: Implemented a new option (-m) to display full memory use
statistics upon subsystem/program termination. (Valery Podrezov)

----------------------------------------
09 November 2006. Summary of changes for version 20061109:

1) ACPI CA Core Subsystem:

Optimized the Load ASL operator in the case where the source operand is
an
operation region. Simply map the operation region memory, instead of
performing a bytewise read. (Region must be of type SystemMemory, see
below.)

Fixed the Load ASL operator for the case where the source operand is a
region field. A buffer object is also allowed as the source operand. BZ
480

Fixed a problem where the Load ASL operator allowed the source operand to
be
an operation region of any type. It is now restricted to regions of type
SystemMemory, as per the ACPI specification. BZ 481

Additional cleanup and optimizations for the new Table Manager code.

AcpiEnable will now fail if all of the required ACPI tables are not
loaded
(FADT, FACS, DSDT). BZ 477

Added #pragma pack(8/4) to acobject.h to ensure that the structures in
this
header are always compiled as aligned. The ACPI_OPERAND_OBJECT has been
manually optimized to be aligned and will not work if it is byte-packed.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release:
    Non-Debug Version:  78.1K Code, 17.1K Data,  95.2K Total
    Debug Version:     155.4K Code, 63.1K Data, 218.5K Total
  Current Release:
    Non-Debug Version:  77.9K Code, 17.0K Data,  94.9K Total
    Debug Version:     155.2K Code, 63.1K Data, 218.3K Total


2) iASL Compiler/Disassembler and Tools:

Fixed a problem where the presence of the _OSI predefined control method
within complex expressions could cause an internal compiler error.

AcpiExec: Implemented full region support for multiple address spaces.
SpaceId is now part of the REGION object. BZ 429

----------------------------------------
11 October 2006. Summary of changes for version 20061011:

1) ACPI CA Core Subsystem:

Completed an AML interpreter performance enhancement for control method
execution. Previously a 2-pass parse/execution, control methods are now
completely parsed and executed in a single pass. This improves overall
interpreter performance by ~25%, reduces code size, and reduces CPU stack
use. (Valery Podrezov + interpreter changes in version 20051202 that
eliminated namespace loading during the pass one parse.)

Implemented _CID support for PCI Root Bridge detection. If the _HID does
not
match the predefined PCI Root Bridge IDs, the _CID list (if present) is
now
obtained and also checked for an ID match.

Implemented additional support for the PCI _ADR execution: upsearch until
a
device scope is found before executing _ADR. This allows PCI_Config
operation regions to be declared locally within control methods
underneath
PCI device objects.

Fixed a problem with a possible race condition between threads executing
AcpiWalkNamespace and the AML interpreter. This condition was removed by
modifying AcpiWalkNamespace to (by default) ignore all temporary
namespace
entries created during any concurrent control method execution. An
additional namespace race condition is known to exist between
AcpiWalkNamespace and the Load/Unload ASL operators and is still under
investigation.

Restructured the AML ParseLoop function, breaking it into several
subfunctions in order to reduce CPU stack use and improve
maintainability.
(Mikhail Kouzmich)

AcpiGetHandle: Fix for parameter validation to detect invalid
combinations
of prefix handle and pathname. BZ 478

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release:
    Non-Debug Version:  77.9K Code, 17.1K Data,  95.0K Total
    Debug Version:     154.6K Code, 63.0K Data, 217.6K Total
  Current Release:
    Non-Debug Version:  78.1K Code, 17.1K Data,  95.2K Total
    Debug Version:     155.4K Code, 63.1K Data, 218.5K Total

2) iASL Compiler/Disassembler and Tools:

Ported the -g option (get local ACPI tables) to the new ACPICA Table
Manager
to restore original behavior.

----------------------------------------
27 September 2006. Summary of changes for version 20060927:

1) ACPI CA Core Subsystem:

Removed the "Flags" parameter from AcpiGetRegister and AcpiSetRegister.
These functions now use a spinlock for mutual exclusion and the interrupt
level indication flag is not needed.

Fixed a problem with the Global Lock where the lock could appear to be
obtained before it is actually obtained. The global lock semaphore was
inadvertently created with one unit instead of zero units. (BZ 464)
Fiodor
Suietov.

Fixed a possible memory leak and fault in AcpiExResolveObjectToValue
during
a read from a buffer or region field. (BZ 458) Fiodor Suietov.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release:
    Non-Debug Version:  77.9K Code, 17.1K Data,  95.0K Total
    Debug Version:     154.7K Code, 63.0K Data, 217.7K Total
  Current Release:
    Non-Debug Version:  77.9K Code, 17.1K Data,  95.0K Total
    Debug Version:     154.6K Code, 63.0K Data, 217.6K Total


2) iASL Compiler/Disassembler and Tools:

Fixed a compilation problem with the pre-defined Resource Descriptor
field
names where an "object does not exist" error could be incorrectly
generated
if the parent ResourceTemplate pathname places the template within a
different namespace scope than the current scope. (BZ 7212)

Fixed a problem where the compiler could hang after syntax errors
detected
in an ElseIf construct. (BZ 453)

Fixed a problem with the AmlFilename parameter to the DefinitionBlock()
operator. An incorrect output filename was produced when this parameter
was
a null string (""). Now, the original input filename is used as the AML
output filename, with an ".aml" extension.

Implemented a generic batch command mode for the AcpiExec utility
(execute
any AML debugger command) (Valery Podrezov).

----------------------------------------
12 September 2006. Summary of changes for version 20060912:

1) ACPI CA Core Subsystem:

Enhanced the implementation of the "serialized mode" of the interpreter
(enabled via the AcpiGbl_AllMethodsSerialized flag.) When this mode is
specified, instead of creating a serialization semaphore per control
method,
the interpreter lock is simply no longer released before a blocking
operation during control method execution. This effectively makes the AML
Interpreter single-threaded. The overhead of a semaphore per-method is
eliminated.

Fixed a regression where an error was no longer emitted if a control
method
attempts to create 2 objects of the same name. This once again returns
AE_ALREADY_EXISTS. When this exception occurs, it invokes the mechanism
that
will dynamically serialize the control method to possible prevent future
errors. (BZ 440)

Integrated a fix for a problem with PCI Express HID detection in the PCI
Config Space setup procedure. (BZ 7145)

Moved all FADT-related functions to a new file, tbfadt.c. Eliminated the
AcpiHwInitialize function - the FADT registers are now validated when the
table is loaded.

Added two new warnings during FADT verification - 1) if the FADT is
larger
than the largest known FADT version, and 2) if there is a mismatch
between
a
32-bit block address and the 64-bit X counterpart (when both are non-
zero.)

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release:
    Non-Debug Version:  77.9K Code, 16.7K Data,  94.6K Total
    Debug Version:     154.9K Code, 62.6K Data, 217.5K Total
  Current Release:
    Non-Debug Version:  77.9K Code, 17.1K Data,  95.0K Total
    Debug Version:     154.7K Code, 63.0K Data, 217.7K Total


2) iASL Compiler/Disassembler and Tools:

Fixed a problem with the implementation of the Switch() operator where
the
temporary variable was declared too close to the actual Switch, instead
of
at method level. This could cause a problem if the Switch() operator is
within a while loop, causing an error on the second iteration. (BZ 460)

Disassembler - fix for error emitted for unknown type for target of scope
operator. Now, ignore it and continue.

Disassembly of an FADT now verifies the input FADT and reports any errors
found. Fix for proper disassembly of full-sized (ACPI 2.0) FADTs.

Disassembly of raw data buffers with byte initialization data now
prefixes
each output line with the current buffer offset.

Disassembly of ASF! table now includes all variable-length data fields at
the end of some of the subtables.

The disassembler now emits a comment if a buffer appears to be a
ResourceTemplate, but cannot be disassembled as such because the EndTag
does
not appear at the very end of the buffer.

AcpiExec - Added the "-t" command line option to enable the serialized
mode
of the AML interpreter.

----------------------------------------
31 August 2006. Summary of changes for version 20060831:

1) ACPI CA Core Subsystem:

Miscellaneous fixes for the Table Manager:
- Correctly initialize internal common FADT for all 64-bit "X" fields
- Fixed a couple table mapping issues during table load
- Fixed a couple alignment issues for IA64
- Initialize input array to zero in AcpiInitializeTables
- Additional parameter validation for AcpiGetTable, AcpiGetTableHeader,
AcpiGetTableByIndex

Change for GPE support: when a "wake" GPE is received, all wake GPEs are
now
immediately disabled to prevent the waking GPE from firing again and to
prevent other wake GPEs from interrupting the wake process.

Added the AcpiGpeCount global that tracks the number of processed GPEs,
to
be used for debugging systems with a large number of ACPI interrupts.

Implemented support for the "DMAR" ACPI table (DMA Redirection Table) in
both the ACPICA headers and the disassembler.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release:
    Non-Debug Version:  77.8K Code, 16.5K Data,  94.3K Total
    Debug Version:     154.6K Code, 62.3K Data, 216.9K Total
  Current Release:
    Non-Debug Version:  77.9K Code, 16.7K Data,  94.6K Total
    Debug Version:     154.9K Code, 62.6K Data, 217.5K Total


2) iASL Compiler/Disassembler and Tools:

Disassembler support for the DMAR ACPI table.

----------------------------------------
23 August 2006. Summary of changes for version 20060823:

1) ACPI CA Core Subsystem:

The Table Manager component has been completely redesigned and
reimplemented. The new design is much simpler, and reduces the overall
code
and data size of the kernel-resident ACPICA by approximately 5%. Also, it
is
now possible to obtain the ACPI tables very early during kernel
initialization, even before dynamic memory management is initialized.
(Alexey Starikovskiy, Fiodor Suietov, Bob Moore)

Obsolete ACPICA interfaces:

- AcpiGetFirmwareTable: Use AcpiGetTable instead (works at early kernel
init
time).
- AcpiLoadTable: Not needed.
- AcpiUnloadTable: Not needed.

New ACPICA interfaces:

- AcpiInitializeTables: Must be called before the table manager can be
used.
- AcpiReallocateRootTable: Used to transfer the root table to dynamically
allocated memory after it becomes available.
- AcpiGetTableByIndex: Allows the host to easily enumerate all ACPI
tables
in the RSDT/XSDT.

Other ACPICA changes:

- AcpiGetTableHeader returns the actual mapped table header, not a copy.
Use
AcpiOsUnmapMemory to free this mapping.
- AcpiGetTable returns the actual mapped table. The mapping is managed
internally and must not be deleted by the caller. Use of this interface
causes no additional dynamic memory allocation.
- AcpiFindRootPointer: Support for physical addressing has been
eliminated,
it appeared to be unused.
- The interface to AcpiOsMapMemory has changed to be consistent with the
other allocation interfaces.
- The interface to AcpiOsGetRootPointer has changed to eliminate
unnecessary
parameters.
- ACPI_PHYSICAL_ADDRESS is now 32 bits on 32-bit platforms, 64 bits on
64-
bit platforms. Was previously 64 bits on all platforms.
- The interface to the ACPI Global Lock acquire/release macros have
changed
slightly since ACPICA no longer keeps a local copy of the FACS with a
constructed pointer to the actual global lock.

Porting to the new table manager:

- AcpiInitializeTables: Must be called once, and can be called anytime
during the OS initialization process. It allows the host to specify an
area
of memory to be used to store the internal version of the RSDT/XSDT (root
table). This allows the host to access ACPI tables before memory
management
is initialized and running.
- AcpiReallocateRootTable: Can be called after memory management is
running
to copy the root table to a dynamically allocated array, freeing up the
scratch memory specified in the call to AcpiInitializeTables.
- AcpiSubsystemInitialize: This existing interface is independent of the
Table Manager, and does not have to be called before the Table Manager
can
be used, it only must be called before the rest of ACPICA can be used.
- ACPI Tables: Some changes have been made to the names and structure of
the
actbl.h and actbl1.h header files and may require changes to existing
code.
For example, bitfields have been completely removed because of their lack
of
portability across C compilers.
- Update interfaces to the Global Lock acquire/release macros if local
versions are used. (see acwin.h)

Obsolete files: tbconvrt.c, tbget.c, tbgetall.c, tbrsdt.c

New files: tbfind.c

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release:
    Non-Debug Version:  80.7K Code, 17.9K Data,  98.6K Total
    Debug Version:     161.0K Code, 65.1K Data, 226.1K Total
  Current Release:
    Non-Debug Version:  77.8K Code, 16.5K Data,  94.3K Total
    Debug Version:     154.6K Code, 62.3K Data, 216.9K Total


2) iASL Compiler/Disassembler and Tools:

No changes for this release.

----------------------------------------
21 July 2006. Summary of changes for version 20060721:

1) ACPI CA Core Subsystem:

The full source code for the ASL test suite used to validate the iASL
compiler and the ACPICA core subsystem is being released with the ACPICA
source for the first time. The source is contained in a separate package
and
consists of over 1100 files that exercise all ASL/AML operators. The
package
should appear on the Intel/ACPI web site shortly. (Valery Podrezov,
Fiodor
Suietov)

Completed a new design and implementation for support of the ACPI Global
Lock. On the OS side, the global lock is now treated as a standard AML
mutex. Previously, multiple OS threads could "acquire" the global lock
simultaneously. However, this could cause the BIOS to be starved out of
the
lock - especially in cases such as the Embedded Controller driver where
there is a tight coupling between the OS and the BIOS.

Implemented an optimization for the ACPI Global Lock interrupt mechanism.
The Global Lock interrupt handler no longer queues the execution of a
separate thread to signal the global lock semaphore. Instead, the
semaphore
is signaled directly from the interrupt handler.

Implemented support within the AML interpreter for package objects that
contain a larger AML length (package list length) than the package
element
count. In this case, the length of the package is truncated to match the
package element count. Some BIOS code apparently modifies the package
length
on the fly, and this change supports this behavior. Provides
compatibility
with the MS AML interpreter. (With assistance from Fiodor Suietov)

Implemented a temporary fix for the BankValue parameter of a Bank Field
to
support all constant values, now including the Zero and One opcodes.
Evaluation of this parameter must eventually be converted to a full
TermArg
evaluation. A not-implemented error is now returned (temporarily) for
non-
constant values for this parameter.

Fixed problem reports (Fiodor Suietov) integrated:
- Fix for premature object deletion after CopyObject on Operation Region
(BZ
350)

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release:
    Non-Debug Version:  80.7K Code, 18.0K Data,  98.7K Total
    Debug Version:     160.9K Code, 65.1K Data, 226.0K Total
  Current Release:
    Non-Debug Version:  80.7K Code, 17.9K Data,  98.6K Total
    Debug Version:     161.0K Code, 65.1K Data, 226.1K Total


2) iASL Compiler/Disassembler and Tools:

No changes for this release.

----------------------------------------
07 July 2006. Summary of changes for version 20060707:

1) ACPI CA Core Subsystem:

Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C compilers
that do not allow the initialization of address pointers within packed
structures - even though the hardware itself may support misaligned
transfers. Some of the debug data structures are packed by default to
minimize size.

Added an error message for the case where AcpiOsGetThreadId() returns
zero.
A non-zero value is required by the core ACPICA code to ensure the proper
operation of AML mutexes and recursive control methods.

The DSDT is now the only ACPI table that determines whether the AML
interpreter is in 32-bit or 64-bit mode. Not really a functional change,
but
the hooks for per-table 32/64 switching have been removed from the code.
A
clarification to the ACPI specification is forthcoming in ACPI 3.0B.

Fixed a possible leak of an OwnerID in the error path of
AcpiTbInitTableDescriptor (tbinstal.c), and migrated all table OwnerID
deletion to a single place in AcpiTbUninstallTable to correct possible
leaks
when using the AcpiTbDeleteTablesByType interface (with assistance from
Lance Ortiz.)

Fixed a problem with Serialized control methods where the semaphore
associated with the method could be over-signaled after multiple method
invocations.

Fixed two issues with the locking of the internal namespace data
structure.
Both the Unload() operator and AcpiUnloadTable interface now lock the
namespace during the namespace deletion associated with the table unload
(with assistance from Linn Crosetto.)

Fixed problem reports (Valery Podrezov) integrated:
- Eliminate unnecessary memory allocation for CreateXxxxField (BZ 5426)

Fixed problem reports (Fiodor Suietov) integrated:
- Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369)
- On Address Space handler deletion, needless deactivation call (BZ 374)
- AcpiRemoveAddressSpaceHandler: validate Device handle parameter (BZ
375)
- Possible memory leak, Notify sub-objects of Processor, Power,
ThermalZone
(BZ 376)
- AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ 378)
- Minimum Length of RSDT should be validated (BZ 379)
- AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj has no
Handler (BZ (380)
- AcpiUnloadTable: return AE_NOT_EXIST if no table of specified type
loaded
(BZ 381)

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release:
    Non-Debug Version:  80.5K Code, 17.8K Data,  98.3K Total
    Debug Version:     160.8K Code, 64.8K Data, 225.6K Total
  Current Release:
    Non-Debug Version:  80.7K Code, 17.9K Data,  98.6K Total
    Debug Version:     161.0K Code, 65.1K Data, 226.1K Total


2) iASL Compiler/Disassembler and Tools:

Fixed problem reports:
Compiler segfault when ASL contains a long (>1024) String declaration (BZ
436)

----------------------------------------
23 June 2006. Summary of changes for version 20060623:

1) ACPI CA Core Subsystem:

Implemented a new ACPI_SPINLOCK type for the OSL lock interfaces. This
allows the type to be customized to the host OS for improved efficiency
(since a spinlock is usually a very small object.)

Implemented support for "ignored" bits in the ACPI registers. According
to
the ACPI specification, these bits should be preserved when writing the
registers via a read/modify/write cycle. There are 3 bits preserved in
this
manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11].

Implemented the initial deployment of new OSL mutex interfaces. Since
some
host operating systems have separate mutex and semaphore objects, this
feature was requested. The base code now uses mutexes (and the new mutex
interfaces) wherever a binary semaphore was used previously. However, for
the current release, the mutex interfaces are defined as macros to map
them
to the existing semaphore interfaces. Therefore, no OSL changes are
required
at this time. (See acpiosxf.h)

Fixed several problems with the support for the control method SyncLevel
parameter. The SyncLevel now works according to the ACPI specification
and
in concert with the Mutex SyncLevel parameter, since the current
SyncLevel
is a property of the executing thread. Mutual exclusion for control
methods
is now implemented with a mutex instead of a semaphore.

Fixed three instances of the use of the C shift operator in the bitfield
support code (exfldio.c) to avoid the use of a shift value larger than
the
target data width. The behavior of C compilers is undefined in this case
and
can cause unpredictable results, and therefore the case must be detected
and
avoided. (Fiodor Suietov)

Added an info message whenever an SSDT or OEM table is loaded dynamically
via the Load() or LoadTable() ASL operators. This should improve
debugging
capability since it will show exactly what tables have been loaded
(beyond
the tables present in the RSDT/XSDT.)

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release:
    Non-Debug Version:  80.0K Code, 17.6K Data,  97.6K Total
    Debug Version:     160.2K Code, 64.7K Data, 224.9K Total
  Current Release:
    Non-Debug Version:  80.5K Code, 17.8K Data,  98.3K Total
    Debug Version:     160.8K Code, 64.8K Data, 225.6K Total


2) iASL Compiler/Disassembler and Tools:

No changes for this release.

----------------------------------------
08 June 2006. Summary of changes for version 20060608:

1) ACPI CA Core Subsystem:

Converted the locking mutex used for the ACPI hardware to a spinlock.
This
change should eliminate all problems caused by attempting to acquire a
semaphore at interrupt level, and it means that all ACPICA external
interfaces that directly access the ACPI hardware can be safely called
from
interrupt level. OSL code that implements the semaphore interfaces should
be
able to eliminate any workarounds for being called at interrupt level.

Fixed a regression introduced in 20060526 where the ACPI device
initialization could be prematurely aborted with an AE_NOT_FOUND if a
device
did not have an optional _INI method.

Fixed an IndexField issue where a write to the Data Register should be
limited in size to the AccessSize (width) of the IndexField itself. (BZ
433,
Fiodor Suietov)

Fixed problem reports (Valery Podrezov) integrated:
- Allow store of ThermalZone objects to Debug object (BZ 5369/5370)

Fixed problem reports (Fiodor Suietov) integrated:
- AcpiGetTableHeader doesn't handle multiple instances correctly (BZ 364)

Removed four global mutexes that were obsolete and were no longer being
used.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release:
    Non-Debug Version:  80.0K Code, 17.7K Data,  97.7K Total
    Debug Version:     160.3K Code, 64.9K Data, 225.2K Total
  Current Release:
    Non-Debug Version:  80.0K Code, 17.6K Data,  97.6K Total
    Debug Version:     160.2K Code, 64.7K Data, 224.9K Total


2) iASL Compiler/Disassembler and Tools:

Fixed a fault when using -g option (get tables from registry) on Windows
machines.

Fixed problem reports integrated:
- Generate error if CreateField NumBits parameter is zero. (BZ 405)
- Fault if Offset/Length in Field unit is very large (BZ 432, Fiodor
Suietov)
- Global table revision override (-r) is ignored (BZ 413)

----------------------------------------
26 May 2006. Summary of changes for version 20060526:

1) ACPI CA Core Subsystem:

Restructured, flattened, and simplified the internal interfaces for
namespace object evaluation - resulting in smaller code, less CPU stack
use,
and fewer interfaces. (With assistance from Mikhail Kouzmich)

Fixed a problem with the CopyObject operator where the first parameter
was
not typed correctly for the parser, interpreter, compiler, and
disassembler.
Caused various errors and unexpected behavior.

Fixed a problem where a ShiftLeft or ShiftRight of more than 64 bits
produced incorrect results with some C compilers. Since the behavior of C
compilers when the shift value is larger than the datatype width is
apparently not well defined, the interpreter now detects this condition
and
simply returns zero as expected in all such cases. (BZ 395)

Fixed problem reports (Valery Podrezov) integrated:
- Update String-to-Integer conversion to match ACPI 3.0A spec (BZ 5329)
- Allow interpreter to handle nested method declarations (BZ 5361)

Fixed problem reports (Fiodor Suietov) integrated:
- AcpiTerminate doesn't free debug memory allocation list objects (BZ
355)
- After Core Subsystem shutdown, AcpiSubsystemStatus returns AE_OK (BZ
356)
- AcpiOsUnmapMemory for RSDP can be invoked inconsistently (BZ 357)
- Resource Manager should return AE_TYPE for non-device objects (BZ 358)
- Incomplete cleanup branch in AcpiNsEvaluateRelative (BZ 359)
- Use AcpiOsFree instead of ACPI_FREE in AcpiRsSetSrsMethodData (BZ 360)
- Incomplete cleanup branch in AcpiPsParseAml (BZ 361)
- Incomplete cleanup branch in AcpiDsDeleteWalkState (BZ 362)
- AcpiGetTableHeader returns AE_NO_ACPI_TABLES until DSDT is loaded (BZ
365)
- Status of the Global Initialization Handler call not used (BZ 366)
- Incorrect object parameter to Global Initialization Handler (BZ 367)

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release:
    Non-Debug Version:  79.8K Code, 17.7K Data,  97.5K Total
    Debug Version:     160.5K Code, 65.1K Data, 225.6K Total
  Current Release:
    Non-Debug Version:  80.0K Code, 17.7K Data,  97.7K Total
    Debug Version:     160.3K Code, 64.9K Data, 225.2K Total


2) iASL Compiler/Disassembler and Tools:

Modified the parser to allow the names IO, DMA, and IRQ to be used as
namespace identifiers with no collision with existing resource descriptor
macro names. This provides compatibility with other ASL compilers and is
most useful for disassembly/recompilation of existing tables without
parse
errors. (With assistance from Thomas Renninger)

Disassembler: fixed an incorrect disassembly problem with the
DataTableRegion and CopyObject operators. Fixed a possible fault during
disassembly of some Alias operators.

----------------------------------------
12 May 2006. Summary of changes for version 20060512:

1) ACPI CA Core Subsystem:

Replaced the AcpiOsQueueForExecution interface with a new interface named
AcpiOsExecute. The major difference is that the new interface does not
have
a Priority parameter, this appeared to be useless and has been replaced
by
a
Type parameter. The Type tells the host what type of execution is being
requested, such as global lock handler, notify handler, GPE handler, etc.
This allows the host to queue and execute the request as appropriate for
the
request type, possibly using different work queues and different
priorities
for the various request types. This enables fixes for multithreading
deadlock problems such as BZ #5534, and will require changes to all
existing
OS interface layers. (Alexey Starikovskiy and Bob Moore)

Fixed a possible memory leak associated with the support for the so-
called
"implicit return" ACPI extension. Reported by FreeBSD, BZ #6514. (Fiodor
Suietov)

Fixed a problem with the Load() operator where a table load from an
operation region could overwrite an internal table buffer by up to 7
bytes
and cause alignment faults on IPF systems. (With assistance from Luming
Yu)

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release:
    Non-Debug Version:  79.7K Code, 17.7K Data,  97.4K Total
    Debug Version:     160.1K Code, 65.2K Data, 225.3K Total
  Current Release:
    Non-Debug Version:  79.8K Code, 17.7K Data,  97.5K Total
    Debug Version:     160.5K Code, 65.1K Data, 225.6K Total



2) iASL Compiler/Disassembler and Tools:

Disassembler: Implemented support to cross reference the internal
namespace
and automatically generate ASL External() statements for symbols not
defined
within the current table being disassembled. This will simplify the
disassembly and recompilation of interdependent tables such as SSDTs
since
these statements will no longer have to be added manually.

Disassembler: Implemented experimental support to automatically detect
invocations of external control methods and generate appropriate
External()
statements. This is problematic because the AML cannot be correctly
parsed
until the number of arguments for each control method is known.
Currently,
standalone method invocations and invocations as the source operand of a
Store() statement are supported.

Disassembler: Implemented support for the ASL pseudo-operators LNotEqual,
LLessEqual, and LGreaterEqual. Previously disassembled as LNot(LEqual()),
LNot(LGreater()), and LNot(LLess()), this makes the disassembled ASL code
more readable and likely closer to the original ASL source.

----------------------------------------
21 April 2006. Summary of changes for version 20060421:

1) ACPI CA Core Subsystem:

Removed a device initialization optimization introduced in 20051216 where
the _STA method was not run unless an _INI was also present for the same
device. This optimization could cause problems because it could allow
_INI
methods to be run within a not-present device subtree. (If a not-present
device had no _INI, _STA would not be run, the not-present status would
not
be discovered, and the children of the device would be incorrectly
traversed.)

Implemented a new _STA optimization where namespace subtrees that do not
contain _INI are identified and ignored during device initialization.
Selectively running _STA can significantly improve boot time on large
machines (with assistance from Len Brown.)

Implemented support for the device initialization case where the returned
_STA flags indicate a device not-present but functioning. In this case,
_INI
is not run, but the device children are examined for presence, as per the
ACPI specification.

Implemented an additional change to the IndexField support in order to
conform to MS behavior. The value written to the Index Register is not
simply a byte offset, it is a byte offset in units of the access width of
the parent Index Field. (Fiodor Suietov)

Defined and deployed a new OSL interface, AcpiOsValidateAddress. This
interface is called during the creation of all AML operation regions, and
allows the host OS to exert control over what addresses it will allow the
AML code to access. Operation Regions whose addresses are disallowed will
cause a runtime exception when they are actually accessed (will not
affect
or abort table loading.) See oswinxf or osunixxf for an example
implementation.

Defined and deployed a new OSL interface, AcpiOsValidateInterface. This
interface allows the host OS to match the various "optional"
interface/behavior strings for the _OSI predefined control method as
appropriate (with assistance from Bjorn Helgaas.) See oswinxf or osunixxf
for an example implementation.

Restructured and corrected various problems in the exception handling
code
paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod
(with assistance from Takayoshi Kochi.)

Modified the Linux source converter to ignore quoted string literals
while
converting identifiers from mixed to lower case. This will correct
problems
with the disassembler and other areas where such strings must not be
modified.

The ACPI_FUNCTION_* macros no longer require quotes around the function
name. This allows the Linux source converter to convert the names, now
that
the converter ignores quoted strings.

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release:

    Non-Debug Version:  81.1K Code, 17.7K Data,  98.8K Total
    Debug Version:     158.9K Code, 64.9K Data, 223.8K Total
  Current Release:
    Non-Debug Version:  79.7K Code, 17.7K Data,  97.4K Total
    Debug Version:     160.1K Code, 65.2K Data, 225.3K Total


2) iASL Compiler/Disassembler and Tools:

Implemented 3 new warnings for iASL, and implemented multiple warning
levels
(w2 flag).

1) Ignored timeouts: If the TimeoutValue parameter to Wait or Acquire is
not
WAIT_FOREVER (0xFFFF) and the code does not examine the return value to
check for the possible timeout, a warning is issued.

2) Useless operators: If an ASL operator does not specify an optional
target
operand and it also does not use the function return value from the
operator, a warning is issued since the operator effectively does
nothing.

3) Unreferenced objects: If a namespace object is created, but never
referenced, a warning is issued. This is a warning level 2 since there
are
cases where this is ok, such as when a secondary table is loaded that
uses
the unreferenced objects. Even so, care is taken to only flag objects
that
don't look like they will ever be used. For example, the reserved methods
(starting with an underscore) are usually not referenced because it is
expected that the OS will invoke them.

----------------------------------------
31 March 2006. Summary of changes for version 20060331:

1) ACPI CA Core Subsystem:

Implemented header file support for the following additional ACPI tables:
ASF!, BOOT, CPEP, DBGP, MCFG, SPCR, SPMI, TCPA, and WDRT. With this
support,
all current and known ACPI tables are now defined in the ACPICA headers
and
are available for use by device drivers and other software.

Implemented support to allow tables that contain ACPI names with invalid
characters to be loaded. Previously, this would cause the table load to
fail, but since there are several known cases of such tables on existing
machines, this change was made to enable ACPI support for them. Also,
this
matches the behavior of the Microsoft ACPI implementation.

Fixed a couple regressions introduced during the memory optimization in
the
20060317 release. The namespace node definition required additional
reorganization and an internal datatype that had been changed to 8-bit
was
restored to 32-bit. (Valery Podrezov)

Fixed a problem where a null pointer passed to AcpiUtDeleteGenericState
could be passed through to AcpiOsReleaseObject which is unexpected. Such
null pointers are now trapped and ignored, matching the behavior of the
previous implementation before the deployment of AcpiOsReleaseObject.
(Valery Podrezov, Fiodor Suietov)

Fixed a memory mapping leak during the deletion of a SystemMemory
operation
region where a cached memory mapping was not deleted. This became a
noticeable problem for operation regions that are defined within
frequently
used control methods. (Dana Meyers)

Reorganized the ACPI table header files into two main files: one for the
ACPI tables consumed by the ACPICA core, and another for the
miscellaneous
ACPI tables that are consumed by the drivers and other software. The
various
FADT definitions were merged into one common section and three different
tables (ACPI 1.0, 1.0+, and 2.0)

Example Code and Data Size: These are the sizes for the OS-independent
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
debug version of the code includes the debug output trace mechanism and
has
a much larger code and data size.

  Previous Release:
    Non-Debug Version:  80.9K Code, 17.7K Data,  98.6K Total
    Debug Version:     158.7K Code, 64.8K Data, 223.5K Total
  Current Release:
    Non-Debug Version:  81.1K Code, 17.7K Data,  98.8K Total
    Debug Version:     158.9K Code, 64.9K Data, 223.8K Total


2) iASL Compiler/Disassembler and Tools:

Disassembler: Implemented support to decode and format all non-AML ACPI
tables (tables other than DSDTs and SSDTs.) This includes the new tables
added to the ACPICA headers, therefore all current and known ACPI tables
are
supported.

Disassembler: The change to allow ACPI names with invalid characters also
enables the disassembly of such tables. Invalid characters within names
are
changed to '*' to make the name printable; the iASL compiler will still
generate an error for such names, however, since this is an invalid ACPI
character.

Implemented an option for AcpiXtract (-a) to extract all tables found in
the
input file. The default invocation extracts only the DSDTs and SSDTs.

Fixed a couple of gcc generation issues for iASL and AcpiExec and added a
makefile for the AcpiXtract utility.

----------------------------------------
17 March 2006. Summary of changes for version 20060317:

1) ACPI CA Core Subsystem:

Implemented the use of a cache object for all internal namespace nodes.
Since there are about 1000 static nodes in a typical system, this will
decrease memory use for cache implementations that minimize per-
allocation
overhead (such as a slab allocator.)

Removed the reference count mechanism for internal namespace nodes, since
it
was deemed unnecessary. This reduces the size of each namespace node by
about 5%-10% on all platforms. Nodes are now 20 bytes for the 32-bit
case,
and 32 bytes for the 64-bit case.

Optimized several internal data structures to reduce object size on 64-
bit
platforms by packing data within the 64-bit alignment. This includes the
frequently used ACPI_OPERAND_OBJECT, of which there can be ~1000 static
instances corresponding to the namespace objects.

Added two new strings for the predefined _OSI method: "Windows 2001.1
SP1"
and "Windows 2006".

Split the allocation tracking mechanism out to a separate file, from
utalloc.c to uttrack.c. This mechanism appears to be only useful for
application-level code. Kernels may wish to not include uttrack.c in
distributions.

Removed all remnants of the obsolete ACPI_REPORT_* macros and the
associated
code. (These macros have been replaced by the ACPI_ERROR and ACPI_WARNING
macros.)

Code and Data Size: These are the sizes for the acpica.lib produced by
the
Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
ACPI
driver or OSPM code. The debug version of the code includes the debug
output
trace mechanism and has a much larger code and data size. Note that these
values will vary depending on the efficiency of the compiler and the
compiler options used during generation.

  Previous Release:
    Non-Debug Version:  81.1K Code, 17.8K Data,  98.9K Total
    Debug Version:     161.6K Code, 65.7K Data, 227.3K Total
  Current Release:
    Non-Debug Version:  80.9K Code, 17.7K Data,  98.6K Total
    Debug Version:     158.7K Code, 64.8K Data, 223.5K Total


2) iASL Compiler/Disassembler and Tools:

Implemented an ANSI C version of the acpixtract utility. This version
will
automatically extract the DSDT and all SSDTs from the input acpidump text
file and dump the binary output to separate files. It can also display a
summary of the input file including the headers for each table found and
will extract any single ACPI table, with any signature. (See
source/tools/acpixtract)

----------------------------------------
10 March 2006. Summary of changes for version 20060310:

1) ACPI CA Core Subsystem:

Tagged all external interfaces to the subsystem with the new
ACPI_EXPORT_SYMBOL macro. This macro can be defined as necessary to
assist
kernel integration. For Linux, the macro resolves to the EXPORT_SYMBOL
macro. The default definition is NULL.

Added the ACPI_THREAD_ID type for the return value from
AcpiOsGetThreadId.
This allows the host to define this as necessary to simplify kernel
integration. The default definition is ACPI_NATIVE_UINT.

Fixed two interpreter problems related to error processing, the deletion
of
objects, and placing invalid pointers onto the internal operator result
stack. BZ 6028, 6151 (Valery Podrezov)

Increased the reference count threshold where a warning is emitted for
large
reference counts in order to eliminate unnecessary warnings on systems
with
large namespaces (especially 64-bit.) Increased the value from 0x400 to
0x800.

Due to universal disagreement as to the meaning of the 'c' in the
calloc()
function, the ACPI_MEM_CALLOCATE macro has been renamed to
ACPI_ALLOCATE_ZEROED so that the purpose of the interface is 'clear'.
ACPI_MEM_ALLOCATE and ACPI_MEM_FREE are renamed to ACPI_ALLOCATE and
ACPI_FREE.

Code and Data Size: These are the sizes for the acpica.lib produced by
the
Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
ACPI
driver or OSPM code. The debug version of the code includes the debug
output
trace mechanism and has a much larger code and data size. Note that these
values will vary depending on the efficiency of the compiler and the
compiler options used during generation.

  Previous Release:
    Non-Debug Version:  81.0K Code, 17.8K Data,  98.8K Total
    Debug Version:     161.4K Code, 65.7K Data, 227.1K Total
  Current Release:
    Non-Debug Version:  81.1K Code, 17.8K Data,  98.9K Total
    Debug Version:     161.6K Code, 65.7K Data, 227.3K Total


2) iASL Compiler/Disassembler:

Disassembler: implemented support for symbolic resource descriptor
references. If a CreateXxxxField operator references a fixed offset
within
a
resource descriptor, a name is assigned to the descriptor and the offset
is
translated to the appropriate resource tag and pathname. The addition of
this support brings the disassembled code very close to the original ASL
source code and helps eliminate run-time errors when the disassembled
code
is modified (and recompiled) in such a way as to invalidate the original
fixed offsets.

Implemented support for a Descriptor Name as the last parameter to the
ASL
Register() macro. This parameter was inadvertently left out of the ACPI
specification, and will be added for ACPI 3.0b.

Fixed a problem where the use of the "_OSI" string (versus the full path
"\_OSI") caused an internal compiler error. ("No back ptr to op")

Fixed a problem with the error message that occurs when an invalid string
is
used for a _HID object (such as one with an embedded asterisk:
"*PNP010A".)
The correct message is now displayed.

----------------------------------------
17 February 2006. Summary of changes for version 20060217:

1) ACPI CA Core Subsystem:

Implemented a change to the IndexField support to match the behavior of
the
Microsoft AML interpreter. The value written to the Index register is now
a
byte offset, no longer an index based upon the width of the Data
register.
This should fix IndexField problems seen on some machines where the Data
register is not exactly one byte wide. The ACPI specification will be
clarified on this point.

Fixed a problem where several resource descriptor types could overrun the
internal descriptor buffer due to size miscalculation: VendorShort,
VendorLong, and Interrupt. This was noticed on IA64 machines, but could
affect all platforms.

Fixed a problem where individual resource descriptors were misaligned
within
the internal buffer, causing alignment faults on IA64 platforms.

Code and Data Size: These are the sizes for the acpica.lib produced by
the
Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
ACPI
driver or OSPM code. The debug version of the code includes the debug
output
trace mechanism and has a much larger code and data size. Note that these
values will vary depending on the efficiency of the compiler and the
compiler options used during generation.

  Previous Release:
    Non-Debug Version:  81.1K Code, 17.8K Data,  98.9K Total
    Debug Version:     161.3K Code, 65.6K Data, 226.9K Total
  Current Release:
    Non-Debug Version:  81.0K Code, 17.8K Data,  98.8K Total
    Debug Version:     161.4K Code, 65.7K Data, 227.1K Total


2) iASL Compiler/Disassembler:

Implemented support for new reserved names: _WDG and _WED are Microsoft
extensions for Windows Instrumentation Management, _TDL is a new ACPI-
defined method (Throttling Depth Limit.)

Fixed a problem where a zero-length VendorShort or VendorLong resource
descriptor was incorrectly emitted as a descriptor of length one.

----------------------------------------
10 February 2006. Summary of changes for version 20060210:

1) ACPI CA Core Subsystem:

Removed a couple of extraneous ACPI_ERROR messages that appeared during
normal execution. These became apparent after the conversion from
ACPI_DEBUG_PRINT.

Fixed a problem where the CreateField operator could hang if the BitIndex
or
NumBits parameter referred to a named object. (Valery Podrezov, BZ 5359)

Fixed a problem where a DeRefOf operation on a buffer object incorrectly
failed with an exception. This also fixes a couple of related RefOf and
DeRefOf issues. (Valery Podrezov, BZ 5360/5392/5387)

Fixed a problem where the AE_BUFFER_LIMIT exception was returned instead
of
AE_STRING_LIMIT on an out-of-bounds Index() operation. (Valery Podrezov,
BZ
5480)

Implemented a memory cleanup at the end of the execution of each
iteration
of an AML While() loop, preventing the accumulation of outstanding
objects.
(Valery Podrezov, BZ 5427)

Eliminated a chunk of duplicate code in the object resolution code.
(Valery
Podrezov, BZ 5336)

Fixed several warnings during the 64-bit code generation.

The AcpiSrc source code conversion tool now inserts one line of
whitespace
after an if() statement that is followed immediately by a comment,
improving
readability of the Linux code.

Code and Data Size: The current and previous library sizes for the core
subsystem are shown below. These are the code and data sizes for the
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
These
values do not include any ACPI driver or OSPM code. The debug version of
the
code includes the debug output trace mechanism and has a much larger code
and data size. Note that these values will vary depending on the
efficiency
of the compiler and the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  81.0K Code, 17.9K Data,  98.9K Total
    Debug Version:     161.3K Code, 65.7K Data, 227.0K Total
  Current Release:
    Non-Debug Version:  81.1K Code, 17.8K Data,  98.9K Total
    Debug Version:     161.3K Code, 65.6K Data, 226.9K Total


2) iASL Compiler/Disassembler:

Fixed a problem with the disassembly of a BankField operator with a
complex
expression for the BankValue parameter.

----------------------------------------
27 January 2006. Summary of changes for version 20060127:

1) ACPI CA Core Subsystem:

Implemented support in the Resource Manager to allow unresolved
namestring
references within resource package objects for the _PRT method. This
support
is in addition to the previously implemented unresolved reference support
within the AML parser. If the interpreter slack mode is enabled, these
unresolved references will be passed through to the caller as a NULL
package
entry.

Implemented and deployed new macros and functions for error and warning
messages across the subsystem. These macros are simpler and generate less
code than their predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_* macros. The older
macros remain defined to allow ACPI drivers time to migrate to the new
macros.

Implemented the ACPI_CPU_FLAGS type to simplify host OS integration of
the
Acquire/Release Lock OSL interfaces.

Fixed a problem where Alias ASL operators are sometimes not correctly
resolved, in both the interpreter and the iASL compiler.

Fixed several problems with the implementation of the
ConcatenateResTemplate
ASL operator. As per the ACPI specification, zero length buffers are now
treated as a single EndTag. One-length buffers always cause a fatal
exception. Non-zero length buffers that do not end with a full 2-byte
EndTag
cause a fatal exception.

Fixed a possible structure overwrite in the AcpiGetObjectInfo external
interface. (With assistance from Thomas Renninger)

Code and Data Size: The current and previous library sizes for the core
subsystem are shown below. These are the code and data sizes for the
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
These
values do not include any ACPI driver or OSPM code. The debug version of
the
code includes the debug output trace mechanism and has a much larger code
and data size. Note that these values will vary depending on the
efficiency
of the compiler and the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  83.1K Code, 18.4K Data, 101.5K Total
    Debug Version:     163.2K Code, 66.2K Data, 229.4K Total
  Current Release:
    Non-Debug Version:  81.0K Code, 17.9K Data,  98.9K Total
    Debug Version:     161.3K Code, 65.7K Data, 227.0K Total


2) iASL Compiler/Disassembler:

Fixed an internal error that was generated for any forward references to
ASL
Alias objects.

----------------------------------------
13 January 2006. Summary of changes for version 20060113:

1) ACPI CA Core Subsystem:

Added 2006 copyright to all module headers and signons. This affects
virtually every file in the ACPICA core subsystem, iASL compiler, and the
utilities.

Enhanced the ACPICA error reporting in order to simplify user migration
to
the non-debug version of ACPICA. Replaced all instances of the
ACPI_DEBUG_PRINT macro invoked at the ACPI_DB_ERROR and ACPI_DB_WARN
debug
levels with the ACPI_REPORT_ERROR and ACPI_REPORT_WARNING macros,
respectively. This preserves all error and warning messages in the non-
debug
version of the ACPICA code (this has been referred to as the "debug lite"
option.) Over 200 cases were converted to create a total of over 380
error/warning messages across the ACPICA code. This increases the code
and
data size of the default non-debug version of the code somewhat (about
13K),
but all error/warning reporting may be disabled if desired (and code
eliminated) by specifying the ACPI_NO_ERROR_MESSAGES compile-time
configuration option. The size of the debug version of ACPICA remains
about
the same.

Fixed a memory leak within the AML Debugger "Set" command. One object was
not properly deleted for every successful invocation of the command.

Code and Data Size: The current and previous library sizes for the core
subsystem are shown below. These are the code and data sizes for the
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
These
values do not include any ACPI driver or OSPM code. The debug version of
the
code includes the debug output trace mechanism and has a much larger code
and data size. Note that these values will vary depending on the
efficiency
of the compiler and the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  76.6K Code, 12.3K Data,  88.9K Total
    Debug Version:     163.7K Code, 67.5K Data, 231.2K Total
  Current Release:
    Non-Debug Version:  83.1K Code, 18.4K Data, 101.5K Total
    Debug Version:     163.2K Code, 66.2K Data, 229.4K Total


2) iASL Compiler/Disassembler:

The compiler now officially supports the ACPI 3.0a specification that was
released on December 30, 2005. (Specification is available at
www.acpi.info)

----------------------------------------
16 December 2005. Summary of changes for version 20051216:

1) ACPI CA Core Subsystem:

Implemented optional support to allow unresolved names within ASL Package
objects. A null object is inserted in the package when a named reference
cannot be located in the current namespace. Enabled via the interpreter
slack flag, this should eliminate AE_NOT_FOUND exceptions seen on
machines
that contain such code.

Implemented an optimization to the initialization sequence that can
improve
boot time. During ACPI device initialization, the _STA method is now run
if
and only if the _INI method exists. The _STA method is used to determine
if
the device is present; An _INI can only be run if _STA returns present,
but
it is a waste of time to run the _STA method if the _INI does not exist.
(Prototype and assistance from Dong Wei)

Implemented use of the C99 uintptr_t for the pointer casting macros if it
is
available in the current compiler. Otherwise, the default (void *) cast
is
used as before.

Fixed some possible memory leaks found within the execution path of the
Break, Continue, If, and CreateField operators. (Valery Podrezov)

Fixed a problem introduced in the 20051202 release where an exception is
generated during method execution if a control method attempts to declare
another method.

Moved resource descriptor string constants that are used by both the AML
disassembler and AML debugger to the common utilities directory so that
these components are independent.

Implemented support in the AcpiExec utility (-e switch) to globally
ignore
exceptions during control method execution (method is not aborted.)

Added the rsinfo.c source file to the AcpiExec makefile for Linux/Unix
generation.

Code and Data Size: The current and previous library sizes for the core
subsystem are shown below. These are the code and data sizes for the
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
These
values do not include any ACPI driver or OSPM code. The debug version of
the
code includes the debug output trace mechanism and has a much larger code
and data size. Note that these values will vary depending on the
efficiency
of the compiler and the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  76.3K Code, 12.3K Data,  88.6K Total
    Debug Version:     163.2K Code, 67.4K Data, 230.6K Total
  Current Release:
    Non-Debug Version:  76.6K Code, 12.3K Data,  88.9K Total
    Debug Version:     163.7K Code, 67.5K Data, 231.2K Total


2) iASL Compiler/Disassembler:

Fixed a problem where a CPU stack overflow fault could occur if a
recursive
method call was made from within a Return statement.

----------------------------------------
02 December 2005. Summary of changes for version 20051202:

1) ACPI CA Core Subsystem:

Modified the parsing of control methods to no longer create namespace
objects during the first pass of the parse. Objects are now created only
during the execute phase, at the moment the namespace creation operator
is
encountered in the AML (Name, OperationRegion, CreateByteField, etc.)
This
should eliminate ALREADY_EXISTS exceptions seen on some machines where
reentrant control methods are protected by an AML mutex. The mutex will
now
correctly block multiple threads from attempting to create the same
object
more than once.

Increased the number of available Owner Ids for namespace object tracking
from 32 to 255. This should eliminate the OWNER_ID_LIMIT exceptions seen
on
some machines with a large number of ACPI tables (either static or
dynamic).

Fixed a problem with the AcpiExec utility where a fault could occur when
the
-b switch (batch mode) is used.

Enhanced the namespace dump routine to output the owner ID for each
namespace object.

Code and Data Size: The current and previous library sizes for the core
subsystem are shown below. These are the code and data sizes for the
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
These
values do not include any ACPI driver or OSPM code. The debug version of
the
code includes the debug output trace mechanism and has a much larger code
and data size. Note that these values will vary depending on the
efficiency
of the compiler and the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  76.3K Code, 12.3K Data,  88.6K Total
    Debug Version:     163.0K Code, 67.4K Data, 230.4K Total
  Current Release:
    Non-Debug Version:  76.3K Code, 12.3K Data,  88.6K Total
    Debug Version:     163.2K Code, 67.4K Data, 230.6K Total


2) iASL Compiler/Disassembler:

Fixed a parse error during compilation of certain Switch/Case constructs.
To
simplify the parse, the grammar now allows for multiple Default
statements
and this error is now detected and flagged during the analysis phase.

Disassembler: The disassembly now includes the contents of the original
table header within a comment at the start of the file. This includes the
name and version of the original ASL compiler.

----------------------------------------
17 November 2005. Summary of changes for version 20051117:

1) ACPI CA Core Subsystem:

Fixed a problem in the AML parser where the method thread count could be
decremented below zero if any errors occurred during the method parse
phase.
This should eliminate AE_AML_METHOD_LIMIT exceptions seen on some
machines.
This also fixed a related regression with the mechanism that detects and
corrects methods that cannot properly handle reentrancy (related to the
deployment of the new OwnerId mechanism.)

Eliminated the pre-parsing of control methods (to detect errors) during
table load. Related to the problem above, this was causing unwind issues
if
any errors occurred during the parse, and it seemed to be overkill. A
table
load should not be aborted if there are problems with any single control
method, thus rendering this feature rather pointless.

Fixed a problem with the new table-driven resource manager where an
internal
buffer overflow could occur for small resource templates.

Implemented a new external interface, AcpiGetVendorResource. This
interface
will find and return a vendor-defined resource descriptor within a _CRS
or
_PRS method via an ACPI 3.0 UUID match. With assistance from Bjorn
Helgaas.

Removed the length limit (200) on string objects as per the upcoming ACPI
3.0A specification. This affects the following areas of the interpreter:
1)
any implicit conversion of a Buffer to a String, 2) a String object
result
of the ASL Concatentate operator, 3) the String object result of the ASL
ToString operator.

Fixed a problem in the Windows OS interface layer (OSL) where a
WAIT_FOREVER
on a semaphore object would incorrectly timeout. This allows the
multithreading features of the AcpiExec utility to work properly under
Windows.

Updated the Linux makefiles for the iASL compiler and AcpiExec to include
the recently added file named "utresrc.c".

Code and Data Size: The current and previous library sizes for the core
subsystem are shown below. These are the code and data sizes for the
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
These
values do not include any ACPI driver or OSPM code. The debug version of
the
code includes the debug output trace mechanism and has a much larger code
and data size. Note that these values will vary depending on the
efficiency
of the compiler and the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  76.2K Code, 12.3K Data,  88.5K Total
    Debug Version:     163.0K Code, 67.4K Data, 230.4K Total
  Current Release:
    Non-Debug Version:  76.3K Code, 12.3K Data,  88.6K Total
    Debug Version:     163.0K Code, 67.4K Data, 230.4K Total


2) iASL Compiler/Disassembler:

Removed the limit (200) on string objects as per the upcoming ACPI 3.0A
specification. For the iASL compiler, this means that string literals
within
the source ASL can be of any length.

Enhanced the listing output to dump the AML code for resource descriptors
immediately after the ASL code for each descriptor, instead of in a block
at
the end of the entire resource template.

Enhanced the compiler debug output to dump the entire original parse tree
constructed during the parse phase, before any transforms are applied to
the
tree. The transformed tree is dumped also.

----------------------------------------
02 November 2005. Summary of changes for version 20051102:

1) ACPI CA Core Subsystem:

Modified the subsystem initialization sequence to improve GPE support.
The
GPE initialization has been split into two parts in order to defer
execution
of the _PRW methods (Power Resources for Wake) until after the hardware
is
fully initialized and the SCI handler is installed. This allows the _PRW
methods to access fields protected by the Global Lock. This will fix
systems
where a NO_GLOBAL_LOCK exception has been seen during initialization.

Converted the ACPI internal object disassemble and display code within
the
AML debugger to fully table-driven operation, reducing code size and
increasing maintainability.

Fixed a regression with the ConcatenateResTemplate() ASL operator
introduced
in the 20051021 release.

Implemented support for "local" internal ACPI object types within the
debugger "Object" command and the AcpiWalkNamespace external interfaces.
These local types include RegionFields, BankFields, IndexFields, Alias,
and
reference objects.

Moved common AML resource handling code into a new file, "utresrc.c".
This
code is shared by both the Resource Manager and the AML Debugger.

Code and Data Size: The current and previous library sizes for the core
subsystem are shown below. These are the code and data sizes for the
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
These
values do not include any ACPI driver or OSPM code. The debug version of
the
code includes the debug output trace mechanism and has a much larger code
and data size. Note that these values will vary depending on the
efficiency
of the compiler and the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  76.1K Code, 12.2K Data,  88.3K Total
    Debug Version:     163.5K Code, 67.0K Data, 230.5K Total
  Current Release:
    Non-Debug Version:  76.2K Code, 12.3K Data,  88.5K Total
    Debug Version:     163.0K Code, 67.4K Data, 230.4K Total


2) iASL Compiler/Disassembler:

Fixed a problem with very large initializer lists (more than 4000
elements)
for both Buffer and Package objects where the parse stack could overflow.

Enhanced the pre-compile source code scan for non-ASCII characters to
ignore
characters within comment fields. The scan is now always performed and is
no
longer optional, detecting invalid characters within a source file
immediately rather than during the parse phase or later.

Enhanced the ASL grammar definition to force early reductions on all
list-
style grammar elements so that the overall parse stack usage is greatly
reduced. This should improve performance and reduce the possibility of
parse
stack overflow.

Eliminated all reduce/reduce conflicts in the iASL parser generation.
Also,
with the addition of a %expected statement, the compiler generates from
source with no warnings.

Fixed a possible segment fault in the disassembler if the input filename
does not contain a "dot" extension (Thomas Renninger).

----------------------------------------
21 October 2005. Summary of changes for version 20051021:

1) ACPI CA Core Subsystem:

Implemented support for the EM64T and other x86-64 processors. This
essentially entails recognizing that these processors support non-aligned
memory transfers. Previously, all 64-bit processors were assumed to lack
hardware support for non-aligned transfers.

Completed conversion of the Resource Manager to nearly full table-driven
operation. Specifically, the resource conversion code (convert AML to
internal format and the reverse) and the debug code to dump internal
resource descriptors are fully table-driven, reducing code and data size
and
improving maintainability.

The OSL interfaces for Acquire and Release Lock now use a 64-bit flag
word
on 64-bit processors instead of a fixed 32-bit word. (With assistance
from
Alexey Starikovskiy)

Implemented support within the resource conversion code for the Type-
Specific byte within the various ACPI 3.0 *WordSpace macros.

Fixed some issues within the resource conversion code for the type-
specific
flags for both Memory and I/O address resource descriptors. For Memory,
implemented support for the MTP and TTP flags. For I/O, split the TRS and
TTP flags into two separate fields.

Code and Data Size: The current and previous library sizes for the core
subsystem are shown below. These are the code and data sizes for the
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
These
values do not include any ACPI driver or OSPM code. The debug version of
the
code includes the debug output trace mechanism and has a much larger code
and data size. Note that these values will vary depending on the
efficiency
of the compiler and the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  77.1K Code, 12.1K Data,  89.2K Total
    Debug Version:     168.0K Code, 68.3K Data, 236.3K Total
  Current Release:
    Non-Debug Version:  76.1K Code, 12.2K Data,  88.3K Total
    Debug Version:     163.5K Code, 67.0K Data, 230.5K Total



2) iASL Compiler/Disassembler:

Relaxed a compiler restriction that disallowed a ResourceIndex byte if
the
corresponding ResourceSource string was not also present in a resource
descriptor declaration. This restriction caused problems with existing
AML/ASL code that includes the Index byte without the string. When such
AML
was disassembled, it could not be compiled without modification. Further,
the modified code created a resource template with a different size than
the
original, breaking code that used fixed offsets into the resource
template
buffer.

Removed a recent feature of the disassembler to ignore a lone
ResourceIndex
byte. This byte is now emitted if present so that the exact AML can be
reproduced when the disassembled code is recompiled.

Improved comments and text alignment for the resource descriptor code
emitted by the disassembler.

Implemented disassembler support for the ACPI 3.0 AccessSize field within
a
Register() resource descriptor.

----------------------------------------
30 September 2005. Summary of changes for version 20050930:

1) ACPI CA Core Subsystem:

Completed a major overhaul of the Resource Manager code - specifically,
optimizations in the area of the AML/internal resource conversion code.
The
code has been optimized to simplify and eliminate duplicated code, CPU
stack
use has been decreased by optimizing function parameters and local
variables, and naming conventions across the manager have been
standardized
for clarity and ease of maintenance (this includes function, parameter,
variable, and struct/typedef names.) The update may force changes in some
driver code, depending on how resources are handled by the host OS.

All Resource Manager dispatch and information tables have been moved to a
single location for clarity and ease of maintenance. One new file was
created, named "rsinfo.c".

The ACPI return macros (return_ACPI_STATUS, etc.) have been modified to
guarantee that the argument is not evaluated twice, making them less
prone
to macro side-effects. However, since there exists the possibility of
additional stack use if a particular compiler cannot optimize them (such
as
in the debug generation case), the original macros are optionally
available.
Note that some invocations of the return_VALUE macro may now cause size
mismatch warnings; the return_UINT8 and return_UINT32 macros are provided
to
eliminate these. (From Randy Dunlap)

Implemented a new mechanism to enable debug tracing for individual
control
methods. A new external interface, AcpiDebugTrace, is provided to enable
this mechanism. The intent is to allow the host OS to easily enable and
disable tracing for problematic control methods. This interface can be
easily exposed to a user or debugger interface if desired. See the file
psxface.c for details.

AcpiUtCallocate will now return a valid pointer if a length of zero is
specified - a length of one is used and a warning is issued. This matches
the behavior of AcpiUtAllocate.

Code and Data Size: The current and previous library sizes for the core
subsystem are shown below. These are the code and data sizes for the
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
These
values do not include any ACPI driver or OSPM code. The debug version of
the
code includes the debug output trace mechanism and has a much larger code
and data size. Note that these values will vary depending on the
efficiency
of the compiler and the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  77.5K Code, 12.0K Data,  89.5K Total
    Debug Version:     168.1K Code, 68.4K Data, 236.5K Total
  Current Release:
    Non-Debug Version:  77.1K Code, 12.1K Data,  89.2K Total
    Debug Version:     168.0K Code, 68.3K Data, 236.3K Total


2) iASL Compiler/Disassembler:

A remark is issued if the effective compile-time length of a package or
buffer is zero. Previously, this was a warning.

----------------------------------------
16 September 2005. Summary of changes for version 20050916:

1) ACPI CA Core Subsystem:

Fixed a problem within the Resource Manager where support for the Generic
Register descriptor was not fully implemented. This descriptor is now
fully
recognized, parsed, disassembled, and displayed.

Completely restructured the Resource Manager code to utilize table-driven
dispatch and lookup, eliminating many of the large switch() statements.
This
reduces overall subsystem code size and code complexity. Affects the
resource parsing and construction, disassembly, and debug dump output.

Cleaned up and restructured the debug dump output for all resource
descriptors. Improved readability of the output and reduced code size.

Fixed a problem where changes to internal data structures caused the
optional ACPI_MUTEX_DEBUG code to fail compilation if specified.

Code and Data Size: The current and previous library sizes for the core
subsystem are shown below. These are the code and data sizes for the
acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
These
values do not include any ACPI driver or OSPM code. The debug version of
the
code includes the debug output trace mechanism and has a much larger code
and data size. Note that these values will vary depending on the
efficiency
of the compiler and the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  78.4K Code, 11.8K Data,  90.2K Total
    Debug Version:     169.6K Code, 69.9K Data, 239.5K Total
  Current Release:
    Non-Debug Version:  77.5K Code, 12.0K Data,  89.5K Total
    Debug Version:     168.1K Code, 68.4K Data, 236.5K Total


2) iASL Compiler/Disassembler:

Updated the disassembler to automatically insert an EndDependentFn()
macro
into the ASL stream if this macro is missing in the original AML code,
simplifying compilation of the resulting ASL module.

Fixed a problem in the disassembler where a disassembled ResourceSource
string (within a large resource descriptor) was not surrounded by quotes
and
not followed by a comma, causing errors when the resulting ASL module was
compiled. Also, escape sequences within a ResourceSource string are now
handled correctly (especially "\\")

----------------------------------------
02 September 2005. Summary of changes for version 20050902:

1) ACPI CA Core Subsystem:

Fixed a problem with the internal Owner ID allocation and deallocation
mechanisms for control method execution and recursive method invocation.
This should eliminate the OWNER_ID_LIMIT exceptions and "Invalid OwnerId"
messages seen on some systems. Recursive method invocation depth is
currently limited to 255. (Alexey Starikovskiy)

Completely eliminated all vestiges of support for the "module-level
executable code" until this support is fully implemented and debugged.
This
should eliminate the NO_RETURN_VALUE exceptions seen during table load on
some systems that invoke this support.

Fixed a problem within the resource manager code where the transaction
flags
for a 64-bit address descriptor were handled incorrectly in the type-
specific flag byte.

Consolidated duplicate code within the address descriptor resource
manager
code, reducing overall subsystem code size.

Fixed a fault when using the AML debugger "disassemble" command to
disassemble individual control methods.

Removed references to the "release_current" directory within the Unix
release package.

Code and Data Size: The current and previous core subsystem library sizes
are shown below. These are the code and data sizes for the acpica.lib
produced by the Microsoft Visual C++ 6.0 compiler. These values do not
include any ACPI driver or OSPM code. The debug version of the code
includes
the debug output trace mechanism and has a much larger code and data
size.
Note that these values will vary depending on the efficiency of the
compiler
and the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  78.6K Code, 11.7K Data,  90.3K Total
    Debug Version:     170.0K Code, 69.9K Data, 239.9K Total
  Current Release:
    Non-Debug Version:  78.4K Code, 11.8K Data,  90.2K Total
    Debug Version:     169.6K Code, 69.9K Data, 239.5K Total


2) iASL Compiler/Disassembler:

Implemented an error check for illegal duplicate values in the interrupt
and
dma lists for the following ASL macros: Dma(), Irq(), IrqNoFlags(), and
Interrupt().

Implemented error checking for the Irq() and IrqNoFlags() macros to
detect
too many values in the interrupt list (16 max) and invalid values in the
list (range 0 - 15)

The maximum length string literal within an ASL file is now restricted to
200 characters as per the ACPI specification.

Fixed a fault when using the -ln option (generate namespace listing).

Implemented an error check to determine if a DescriptorName within a
resource descriptor has already been used within the current scope.

----------------------------------------
15 August 2005.  Summary of changes for version 20050815:

1) ACPI CA Core Subsystem:

Implemented a full bytewise compare to determine if a table load request
is
attempting to load a duplicate table. The compare is performed if the
table
signatures and table lengths match. This will allow different tables with
the same OEM Table ID and revision to be loaded - probably against the
ACPI
specification, but discovered in the field nonetheless.

Added the changes.txt logfile to each of the zipped release packages.

Code and Data Size: Current and previous core subsystem library sizes are
shown below. These are the code and data sizes for the acpica.lib
produced
by the Microsoft Visual C++ 6.0 compiler, and these values do not include
any ACPI driver or OSPM code. The debug version of the code includes the
debug output trace mechanism and has a much larger code and data size.
Note
that these values will vary depending on the efficiency of the compiler
and
the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  78.6K Code, 11.7K Data,  90.3K Total
    Debug Version:     167.0K Code, 69.9K Data, 236.9K Total
  Current Release:
    Non-Debug Version:  78.6K Code, 11.7K Data,  90.3K Total
    Debug Version:     170.0K Code, 69.9K Data, 239.9K Total


2) iASL Compiler/Disassembler:

Fixed a problem where incorrect AML code could be generated for Package
objects if optimization is disabled (via the -oa switch).

Fixed a problem with where incorrect AML code is generated for variable-
length packages when the package length is not specified and the number
of
initializer values is greater than 255.


----------------------------------------
29 July 2005.  Summary of changes for version 20050729:

1) ACPI CA Core Subsystem:

Implemented support to ignore an attempt to install/load a particular
ACPI
table more than once. Apparently there exists BIOS code that repeatedly
attempts to load the same SSDT upon certain events. With assistance from
Venkatesh Pallipadi.

Restructured the main interface to the AML parser in order to correctly
handle all exceptional conditions. This will prevent leakage of the
OwnerId
resource and should eliminate the AE_OWNER_ID_LIMIT exceptions seen on
some
machines. With assistance from Alexey Starikovskiy.

Support for "module level code" has been disabled in this version due to
a
number of issues that have appeared on various machines. The support can
be
enabled by defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem
compilation. When the issues are fully resolved, the code will be enabled
by
default again.

Modified the internal functions for debug print support to define the
FunctionName parameter as a (const char *) for compatibility with
compiler
built-in macros such as __FUNCTION__, etc.

Linted the entire ACPICA source tree for both 32-bit and 64-bit.

Implemented support to display an object count summary for the AML
Debugger
commands Object and Methods.

Code and Data Size: Current and previous core subsystem library sizes are
shown below. These are the code and data sizes for the acpica.lib
produced
by the Microsoft Visual C++ 6.0 compiler, and these values do not include
any ACPI driver or OSPM code. The debug version of the code includes the
debug output trace mechanism and has a much larger code and data size.
Note
that these values will vary depending on the efficiency of the compiler
and
the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  78.6K Code, 11.6K Data,  90.2K Total
    Debug Version:     170.0K Code, 69.7K Data, 239.7K Total
  Current Release:
    Non-Debug Version:  78.6K Code, 11.7K Data,  90.3K Total
    Debug Version:     167.0K Code, 69.9K Data, 236.9K Total


2) iASL Compiler/Disassembler:

Fixed a regression that appeared in the 20050708 version of the compiler
where an error message was inadvertently emitted for invocations of the
_OSI
reserved control method.

----------------------------------------
08 July 2005.  Summary of changes for version 20050708:

1) ACPI CA Core Subsystem:

The use of the CPU stack in the debug version of the subsystem has been
considerably reduced. Previously, a debug structure was declared in every
function that used the debug macros. This structure has been removed in
favor of declaring the individual elements as parameters to the debug
functions. This reduces the cumulative stack use during nested execution
of
ACPI function calls at the cost of a small increase in the code size of
the
debug version of the subsystem. With assistance from Alexey Starikovskiy
and
Len Brown.

Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent
headers to define a macro that will return the current function name at
runtime (such as __FUNCTION__ or _func_, etc.) The function name is used
by
the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the
compiler-dependent header, the function name is saved on the CPU stack
(one
pointer per function.) This mechanism is used because apparently there
exists no standard ANSI-C defined macro that that returns the function
name.

Redesigned and reimplemented the "Owner ID" mechanism used to track
namespace objects created/deleted by ACPI tables and control method
execution. A bitmap is now used to allocate and free the IDs, thus
solving
the wraparound problem present in the previous implementation. The size
of
the namespace node descriptor was reduced by 2 bytes as a result (Alexey
Starikovskiy).

Removed the UINT32_BIT and UINT16_BIT types that were used for the
bitfield
flag definitions within the headers for the predefined ACPI tables. These
have been replaced by UINT8_BIT in order to increase the code portability
of
the subsystem. If the use of UINT8 remains a problem, we may be forced to
eliminate bitfields entirely because of a lack of portability.

Enhanced the performance of the AcpiUtUpdateObjectReference procedure.
This
is a frequently used function and this improvement increases the
performance
of the entire subsystem (Alexey Starikovskiy).

Fixed several possible memory leaks and the inverse - premature object
deletion (Alexey Starikovskiy).

Code and Data Size: Current and previous core subsystem library sizes are
shown below. These are the code and data sizes for the acpica.lib
produced
by the Microsoft Visual C++ 6.0 compiler, and these values do not include
any ACPI driver or OSPM code. The debug version of the code includes the
debug output trace mechanism and has a much larger code and data size.
Note
that these values will vary depending on the efficiency of the compiler
and
the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  78.6K Code, 11.5K Data,  90.1K Total
    Debug Version:     165.2K Code, 69.6K Data, 234.8K Total
  Current Release:
    Non-Debug Version:  78.6K Code, 11.6K Data,  90.2K Total
    Debug Version:     170.0K Code, 69.7K Data, 239.7K Total

----------------------------------------
24 June 2005.  Summary of changes for version 20050624:

1) ACPI CA Core Subsystem:

Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for
the host-defined cache object. This allows the OSL implementation to
define
and type this object in any manner desired, simplifying the OSL
implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for
Linux, and should be defined in the OS-specific header file for other
operating systems as required.

Changed the interface to AcpiOsAcquireObject to directly return the
requested object as the function return (instead of ACPI_STATUS.) This
change was made for performance reasons, since this is the purpose of the
interface in the first place. AcpiOsAcquireObject is now similar to the
AcpiOsAllocate interface.

Implemented a new AML debugger command named Businfo. This command
displays
information about all devices that have an associate _PRT object. The
_ADR,
_HID, _UID, and _CID are displayed for these devices.

Modified the initialization sequence in AcpiInitializeSubsystem to call
the
OSL interface AcpiOslInitialize first, before any local initialization.
This
change was required because the global initialization now calls OSL
interfaces.

Enhanced the Dump command to display the entire contents of Package
objects
(including all sub-objects and their values.)

Restructured the code base to split some files because of size and/or
because the code logically belonged in a separate file. New files are
listed
below. All makefiles and project files included in the ACPI CA release
have
been updated.
    utilities/utcache.c           /* Local cache interfaces */
    utilities/utmutex.c           /* Local mutex support */
    utilities/utstate.c           /* State object support */
    interpreter/parser/psloop.c   /* Main AML parse loop */

Code and Data Size: Current and previous core subsystem library sizes are
shown below. These are the code and data sizes for the acpica.lib
produced
by the Microsoft Visual C++ 6.0 compiler, and these values do not include
any ACPI driver or OSPM code. The debug version of the code includes the
debug output trace mechanism and has a much larger code and data size.
Note
that these values will vary depending on the efficiency of the compiler
and
the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  78.3K Code, 11.6K Data,  89.9K Total
    Debug Version:     164.0K Code, 69.1K Data, 233.1K Total
  Current Release:
    Non-Debug Version:  78.6K Code, 11.5K Data,  90.1K Total
    Debug Version:     165.2K Code, 69.6K Data, 234.8K Total


2) iASL Compiler/Disassembler:

Fixed a regression introduced in version 20050513 where the use of a
Package
object within a Case() statement caused a compile time exception. The
original behavior has been restored (a Match() operator is emitted.)

----------------------------------------
17 June 2005.  Summary of changes for version 20050617:

1) ACPI CA Core Subsystem:

Moved the object cache operations into the OS interface layer (OSL) to
allow
the host OS to handle these operations if desired (for example, the Linux
OSL will invoke the slab allocator). This support is optional; the
compile
time define ACPI_USE_LOCAL_CACHE may be used to utilize the original
cache
code in the ACPI CA core. The new OSL interfaces are shown below. See
utalloc.c for an example implementation, and acpiosxf.h for the exact
interface definitions. With assistance from Alexey Starikovskiy.
    AcpiOsCreateCache
    AcpiOsDeleteCache
    AcpiOsPurgeCache
    AcpiOsAcquireObject
    AcpiOsReleaseObject

Modified the interfaces to AcpiOsAcquireLock and AcpiOsReleaseLock to
return
and restore a flags parameter. This fits better with many OS lock models.
Note: the current execution state (interrupt handler or not) is no longer
passed to these interfaces. If necessary, the OSL must determine this
state
by itself, a simple and fast operation. With assistance from Alexey
Starikovskiy.

Fixed a problem in the ACPI table handling where a valid XSDT was assumed
present if the revision of the RSDP was 2 or greater. According to the
ACPI
specification, the XSDT is optional in all cases, and the table manager
therefore now checks for both an RSDP >=2 and a valid XSDT pointer.
Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs
contain
only the RSDT.

Fixed an interpreter problem with the Mid() operator in the case of an
input
string where the resulting output string is of zero length. It now
correctly
returns a valid, null terminated string object instead of a string object
with a null pointer.

Fixed a problem with the control method argument handling to allow a
store
to an Arg object that already contains an object of type Device. The
Device
object is now correctly overwritten. Previously, an error was returned.


Enhanced the debugger Find command to emit object values in addition to
the
found object pathnames. The output format is the same as the dump
namespace
command.

Enhanced the debugger Set command. It now has the ability to set the
value
of any Named integer object in the namespace (Previously, only method
locals
and args could be set.)

Code and Data Size: Current and previous core subsystem library sizes are
shown below. These are the code and data sizes for the acpica.lib
produced
by the Microsoft Visual C++ 6.0 compiler, and these values do not include
any ACPI driver or OSPM code. The debug version of the code includes the
debug output trace mechanism and has a much larger code and data size.
Note
that these values will vary depending on the efficiency of the compiler
and
the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  78.1K Code, 11.6K Data,  89.7K Total
    Debug Version:     164.0K Code, 69.3K Data, 233.3K Total
  Current Release:
    Non-Debug Version:  78.3K Code, 11.6K Data,  89.9K Total
    Debug Version:     164.0K Code, 69.1K Data, 233.1K Total


2) iASL Compiler/Disassembler:

Fixed a regression in the disassembler where if/else/while constructs
were
output incorrectly. This problem was introduced in the previous release
(20050526). This problem also affected the single-step disassembly in the
debugger.

Fixed a problem where compiling the reserved _OSI method would randomly
(but
rarely) produce compile errors.

Enhanced the disassembler to emit compilable code in the face of
incorrect
AML resource descriptors. If the optional ResourceSourceIndex is present,
but the ResourceSource is not, do not emit the ResourceSourceIndex in the
disassembly. Otherwise, the resulting code cannot be compiled without
errors.

----------------------------------------
26 May 2005.  Summary of changes for version 20050526:

1) ACPI CA Core Subsystem:

Implemented support to execute Type 1 and Type 2 AML opcodes appearing at
the module level (not within a control method.) These opcodes are
executed
exactly once at the time the table is loaded. This type of code was legal
up
until the release of ACPI 2.0B (2002) and is now supported within ACPI CA
in
order to provide backwards compatibility with earlier BIOS
implementations.
This eliminates the "Encountered executable code at module level" warning
that was previously generated upon detection of such code.

Fixed a problem in the interpreter where an AE_NOT_FOUND exception could
inadvertently be generated during the lookup of namespace objects in the
second pass parse of ACPI tables and control methods. It appears that
this
problem could occur during the resolution of forward references to
namespace
objects.

Added the ACPI_MUTEX_DEBUG #ifdef to the AcpiUtReleaseMutex function,
corresponding to the same #ifdef in the AcpiUtAcquireMutex function. This
allows the deadlock detection debug code to be compiled out in the normal
case, improving mutex performance (and overall subsystem performance)
considerably.

Implemented a handful of miscellaneous fixes for possible memory leaks on
error conditions and error handling control paths. These fixes were
suggested by FreeBSD and the Coverity Prevent source code analysis tool.

Added a check for a null RSDT pointer in AcpiGetFirmwareTable
(tbxfroot.c)
to prevent a fault in this error case.

Code and Data Size: Current and previous core subsystem library sizes are
shown below. These are the code and data sizes for the acpica.lib
produced
by the Microsoft Visual C++ 6.0 compiler, and these values do not include
any ACPI driver or OSPM code. The debug version of the code includes the
debug output trace mechanism and has a much larger code and data size.
Note
that these values will vary depending on the efficiency of the compiler
and
the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  78.2K Code, 11.6K Data,  89.8K Total
    Debug Version:     163.7K Code, 69.3K Data, 233.0K Total
  Current Release:
    Non-Debug Version:  78.1K Code, 11.6K Data,  89.7K Total
    Debug Version:     164.0K Code, 69.3K Data, 233.3K Total


2) iASL Compiler/Disassembler:

Implemented support to allow Type 1 and Type 2 ASL operators to appear at
the module level (not within a control method.) These operators will be
executed once at the time the table is loaded. This type of code was
legal
up until the release of ACPI 2.0B (2002) and is now supported by the iASL
compiler in order to provide backwards compatibility with earlier BIOS
ASL
code.

The ACPI integer width (specified via the table revision ID or the -r
override, 32 or 64 bits) is now used internally during compile-time
constant
folding to ensure that constants are truncated to 32 bits if necessary.
Previously, the revision ID value was only emitted in the AML table
header.

An error message is now generated for the Mutex and Method operators if
the
SyncLevel parameter is outside the legal range of 0 through 15.

Fixed a problem with the Method operator ParameterTypes list handling
(ACPI
3.0). Previously, more than 2 types or 2 arguments generated a syntax
error.
The actual underlying implementation of method argument typechecking is
still under development, however.

----------------------------------------
13 May 2005.  Summary of changes for version 20050513:

1) ACPI CA Core Subsystem:

Implemented support for PCI Express root bridges -- added support for
device
PNP0A08 in the root bridge search within AcpiEvPciConfigRegionSetup.

The interpreter now automatically truncates incoming 64-bit constants to
32
bits if currently executing out of a 32-bit ACPI table (Revision < 2).
This
also affects the iASL compiler constant folding. (Note: as per below, the
iASL compiler no longer allows 64-bit constants within 32-bit tables.)

Fixed a problem where string and buffer objects with "static" pointers
(pointers to initialization data within an ACPI table) were not handled
consistently. The internal object copy operation now always copies the
data
to a newly allocated buffer, regardless of whether the source object is
static or not.

Fixed a problem with the FromBCD operator where an implicit result
conversion was improperly performed while storing the result to the
target
operand. Since this is an "explicit conversion" operator, the implicit
conversion should never be performed on the output.

Fixed a problem with the CopyObject operator where a copy to an existing
named object did not always completely overwrite the existing object
stored
at name. Specifically, a buffer-to-buffer copy did not delete the
existing
buffer.

Replaced "InterruptLevel" with "InterruptNumber" in all GPE interfaces
and
structs for consistency.

Code and Data Size: Current and previous core subsystem library sizes are
shown below. These are the code and data sizes for the acpica.lib
produced
by the Microsoft Visual C++ 6.0 compiler, and these values do not include
any ACPI driver or OSPM code. The debug version of the code includes the
debug output trace mechanism and has a much larger code and data size.
Note
that these values will vary depending on the efficiency of the compiler
and
the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  78.2K Code, 11.6K Data,  89.8K Total
    Debug Version:     163.7K Code, 69.3K Data, 233.0K Total
  Current Release: (Same sizes)
    Non-Debug Version:  78.2K Code, 11.6K Data,  89.8K Total
    Debug Version:     163.7K Code, 69.3K Data, 233.0K Total


2) iASL Compiler/Disassembler:

The compiler now emits a warning if an attempt is made to generate a 64-
bit
integer constant from within a 32-bit ACPI table (Revision < 2). The
integer
is truncated to 32 bits.

Fixed a problem with large package objects: if the static length of the
package is greater than 255, the "variable length package" opcode is
emitted. Previously, this caused an error. This requires an update to the
ACPI spec, since it currently (incorrectly) states that packages larger
than
255 elements are not allowed.

The disassembler now correctly handles variable length packages and
packages
larger than 255 elements.

----------------------------------------
08 April 2005.  Summary of changes for version 20050408:

1) ACPI CA Core Subsystem:

Fixed three cases in the interpreter where an "index" argument to an ASL
function was still (internally) 32 bits instead of the required 64 bits.
This was the Index argument to the Index, Mid, and Match operators.

The "strupr" function is now permanently local (AcpiUtStrupr), since this
is
not a POSIX-defined function and not present in most kernel-level C
libraries. All references to the C library strupr function have been
removed
from the headers.

Completed the deployment of static functions/prototypes. All prototypes
with
the static attribute have been moved from the headers to the owning C
file.

Implemented an extract option (-e) for the AcpiBin utility (AML binary
utility). This option allows the utility to extract individual ACPI
tables
from the output of AcpiDmp. It provides the same functionality of the
acpixtract.pl perl script without the worry of setting the correct perl
options. AcpiBin runs on Windows and has not yet been generated/validated
in
the Linux/Unix environment (but should be soon).

Updated and fixed the table dump option for AcpiBin (-d). This option
converts a single ACPI table to a hex/ascii file, similar to the output
of
AcpiDmp.

Code and Data Size: Current and previous core subsystem library sizes are
shown below. These are the code and data sizes for the acpica.lib
produced
by the Microsoft Visual C++ 6.0 compiler, and these values do not include
any ACPI driver or OSPM code. The debug version of the code includes the
debug output trace mechanism and has a much larger code and data size.
Note
that these values will vary depending on the efficiency of the compiler
and
the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  78.0K Code, 11.6K Data,  89.6K Total
    Debug Version:     163.5K Code, 69.3K Data, 232.8K Total
  Current Release:
    Non-Debug Version:  78.2K Code, 11.6K Data,  89.8K Total
    Debug Version:     163.7K Code, 69.3K Data, 233.0K Total


2) iASL Compiler/Disassembler:

Disassembler fix: Added a check to ensure that the table length found in
the
ACPI table header within the input file is not longer than the actual
input
file size. This indicates some kind of file or table corruption.

----------------------------------------
29 March 2005.  Summary of changes for version 20050329:

1) ACPI CA Core Subsystem:

An error is now generated if an attempt is made to create a Buffer Field
of
length zero (A CreateField with a length operand of zero.)

The interpreter now issues a warning whenever executable code at the
module
level is detected during ACPI table load. This will give some idea of the
prevalence of this type of code.

Implemented support for references to named objects (other than control
methods) within package objects.

Enhanced package object output for the debug object. Package objects are
now
completely dumped, showing all elements.

Enhanced miscellaneous object output for the debug object. Any object can
now be written to the debug object (for example, a device object can be
written, and the type of the object will be displayed.)

The "static" qualifier has been added to all local functions across both
the
core subsystem and the iASL compiler.

The number of "long" lines (> 80 chars) within the source has been
significantly reduced, by about 1/3.

Cleaned up all header files to ensure that all CA/iASL functions are
prototyped (even static functions) and the formatting is consistent.

Two new header files have been added, acopcode.h and acnames.h.

Removed several obsolete functions that were no longer used.

Code and Data Size: Current and previous core subsystem library sizes are
shown below. These are the code and data sizes for the acpica.lib
produced
by the Microsoft Visual C++ 6.0 compiler, and these values do not include
any ACPI driver or OSPM code. The debug version of the code includes the
debug output trace mechanism and has a much larger code and data size.
Note
that these values will vary depending on the efficiency of the compiler
and
the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  78.3K Code, 11.5K Data,  89.8K Total
    Debug Version:     165.4K Code, 69.7K Data, 236.1K Total
  Current Release:
    Non-Debug Version:  78.0K Code, 11.6K Data,  89.6K Total
    Debug Version:     163.5K Code, 69.3K Data, 232.8K Total



2) iASL Compiler/Disassembler:

Fixed a problem with the resource descriptor generation/support. For the
ResourceSourceIndex and the ResourceSource fields, both must be present,
or
both must be not present - can't have one without the other.

The compiler now returns non-zero from the main procedure if any errors
have
occurred during the compilation.


----------------------------------------
09 March 2005.  Summary of changes for version 20050309:

1) ACPI CA Core Subsystem:

The string-to-buffer implicit conversion code has been modified again
after
a change to the ACPI specification.  In order to match the behavior of
the
other major ACPI implementation, the target buffer is no longer truncated
if
the source string is smaller than an existing target buffer. This change
requires an update to the ACPI spec, and should eliminate the recent
AE_AML_BUFFER_LIMIT issues.

The "implicit return" support was rewritten to a new algorithm that
solves
the general case. Rather than attempt to determine when a method is about
to
exit, the result of every ASL operator is saved momentarily until the
very
next ASL operator is executed. Therefore, no matter how the method exits,
there will always be a saved implicit return value. This feature is only
enabled with the AcpiGbl_EnableInterpreterSlack flag, and should
eliminate
AE_AML_NO_RETURN_VALUE errors when enabled.

Implemented implicit conversion support for the predicate (operand) of
the
If, Else, and While operators. String and Buffer arguments are
automatically
converted to Integers.

Changed the string-to-integer conversion behavior to match the new ACPI
errata: "If no integer object exists, a new integer is created. The ASCII
string is interpreted as a hexadecimal constant. Each string character is
interpreted as a hexadecimal value ('0'-'9', 'A'-'F', 'a', 'f'), starting
with the first character as the most significant digit, and ending with
the
first non-hexadecimal character or end-of-string." This means that the
first
non-hex character terminates the conversion and this is the code that was
changed.

Fixed a problem where the ObjectType operator would fail (fault) when
used
on an Index of a Package which pointed to a null package element. The
operator now properly returns zero (Uninitialized) in this case.

Fixed a problem where the While operator used excessive memory by not
properly popping the result stack during execution. There was no memory
leak
after execution, however. (Code provided by Valery Podrezov.)

Fixed a problem where references to control methods within Package
objects
caused the method to be invoked, instead of producing a reference object
pointing to the method.

Restructured and simplified the pswalk.c module (AcpiPsDeleteParseTree)
to
improve performance and reduce code size. (Code provided by Alexey
Starikovskiy.)

Code and Data Size: Current and previous core subsystem library sizes are
shown below. These are the code and data sizes for the acpica.lib
produced
by the Microsoft Visual C++ 6.0 compiler, and these values do not include
any ACPI driver or OSPM code. The debug version of the code includes the
debug output trace mechanism and has a much larger code and data size.
Note
that these values will vary depending on the efficiency of the compiler
and
the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  78.3K Code, 11.5K Data,  89.8K Total
    Debug Version:     165.4K Code, 69.6K Data, 236.0K Total
  Current Release:
    Non-Debug Version:  78.3K Code, 11.5K Data,  89.8K Total
    Debug Version:     165.4K Code, 69.7K Data, 236.1K Total


2) iASL Compiler/Disassembler:

Fixed a problem with the Return operator with no arguments. Since the AML
grammar for the byte encoding requires an operand for the Return opcode,
the
compiler now emits a Return(Zero) for this case.  An ACPI specification
update has been written for this case.

For tables other than the DSDT, namepath optimization is automatically
disabled. This is because SSDTs can be loaded anywhere in the namespace,
the
compiler has no knowledge of where, and thus cannot optimize namepaths.

Added "ProcessorObj" to the ObjectTypeKeyword list. This object type was
inadvertently omitted from the ACPI specification, and will require an
update to the spec.

The source file scan for ASCII characters is now optional (-a). This
change
was made because some vendors place non-ascii characters within comments.
However, the scan is simply a brute-force byte compare to ensure all
characters in the file are in the range 0x00 to 0x7F.

Fixed a problem with the CondRefOf operator where the compiler was
inappropriately checking for the existence of the target. Since the point
of
the operator is to check for the existence of the target at run-time, the
compiler no longer checks for the target existence.

Fixed a problem where errors generated from the internal AML interpreter
during constant folding were not handled properly, causing a fault.

Fixed a problem with overly aggressive range checking for the Stall
operator. The valid range (max 255) is now only checked if the operand is
of
type Integer. All other operand types cannot be statically checked.

Fixed a problem where control method references within the RefOf,
DeRefOf,
and ObjectType operators were not treated properly. They are now treated
as
actual references, not method invocations.

Fixed and enhanced the "list namespace" option (-ln). This option was
broken
a number of releases ago.

Improved error handling for the Field, IndexField, and BankField
operators.
The compiler now cleanly reports and recovers from errors in the field
component (FieldUnit) list.

Fixed a disassembler problem where the optional ResourceDescriptor fields
TRS and TTP were not always handled correctly.

Disassembler - Comments in output now use "//" instead of "/*"

----------------------------------------
28 February 2005.  Summary of changes for version 20050228:

1) ACPI CA Core Subsystem:

Fixed a problem where the result of an Index() operator (an object
reference) must increment the reference count on the target object for
the
life of the object reference.

Implemented AML Interpreter and Debugger support for the new ACPI 3.0
Extended Address (IO, Memory, Space), QwordSpace, DwordSpace, and
WordSpace
resource descriptors.

Implemented support in the _OSI method for the ACPI 3.0 "Extended Address
Space Descriptor" string, indicating interpreter support for the
descriptors
above.

Implemented header support for the new ACPI 3.0 FADT flag bits.

Implemented header support for the new ACPI 3.0 PCI Express bits for the
PM1
status/enable registers.

Updated header support for the MADT processor local Apic struct and MADT
platform interrupt source struct for new ACPI 3.0 fields.

Implemented header support for the SRAT and SLIT ACPI tables.

Implemented the -s switch in AcpiExec to enable the "InterpreterSlack"
flag
at runtime.

Code and Data Size: Current and previous core subsystem library sizes are
shown below. These are the code and data sizes for the acpica.lib
produced
by the Microsoft Visual C++ 6.0 compiler, and these values do not include
any ACPI driver or OSPM code. The debug version of the code includes the
debug output trace mechanism and has a much larger code and data size.
Note
that these values will vary depending on the efficiency of the compiler
and
the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  78.2K Code, 11.5K Data,  89.7K Total
    Debug Version:     164.9K Code, 69.2K Data, 234.1K Total
  Current Release:
    Non-Debug Version:  78.3K Code, 11.5K Data,  89.8K Total
    Debug Version:     165.4K Code, 69.6K Data, 236.0K Total


2) iASL Compiler/Disassembler:

Fixed a problem with the internal 64-bit String-to-integer conversion
with
strings less than two characters long.

Fixed a problem with constant folding where the result of the Index()
operator can not be considered a constant. This means that Index() cannot
be
a type3 opcode and this will require an update to the ACPI specification.

Disassembler: Implemented support for the TTP, MTP, and TRS resource
descriptor fields. These fields were inadvertently ignored and not output
in
the disassembly of the resource descriptor.


 ----------------------------------------
11 February 2005.  Summary of changes for version 20050211:

1) ACPI CA Core Subsystem:

Implemented ACPI 3.0 support for implicit conversion within the Match()
operator. MatchObjects can now be of type integer, buffer, or string
instead
of just type integer.  Package elements are implicitly converted to the
type
of the MatchObject. This change aligns the behavior of Match() with the
behavior of the other logical operators (LLess(), etc.) It also requires
an
errata change to the ACPI specification as this support was intended for
ACPI 3.0, but was inadvertently omitted.

Fixed a problem with the internal implicit "to buffer" conversion.
Strings
that are converted to buffers will cause buffer truncation if the string
is
smaller than the target buffer. Integers that are converted to buffers
will
not cause buffer truncation, only zero extension (both as per the ACPI
spec.) The problem was introduced when code was added to truncate the
buffer, but this should not be performed in all cases, only the string
case.

Fixed a problem with the Buffer and Package operators where the
interpreter
would get confused if two such operators were used as operands to an ASL
operator (such as LLess(Buffer(1){0},Buffer(1){1}). The internal result
stack was not being popped after the execution of these operators,
resulting
in an AE_NO_RETURN_VALUE exception.

Fixed a problem with constructs of the form Store(Index(...),...). The
reference object returned from Index was inadvertently resolved to an
actual
value. This problem was introduced in version 20050114 when the behavior
of
Store() was modified to restrict the object types that can be used as the
source operand (to match the ACPI specification.)

Reduced excessive stack use within the AcpiGetObjectInfo procedure.

Added a fix to aclinux.h to allow generation of AcpiExec on Linux.

Updated the AcpiSrc utility to add the FADT_DESCRIPTOR_REV2_MINUS struct.

Code and Data Size: Current and previous core subsystem library sizes are
shown below. These are the code and data sizes for the acpica.lib
produced
by the Microsoft Visual C++ 6.0 compiler, and these values do not include
any ACPI driver or OSPM code. The debug version of the code includes the
debug output trace mechanism and has a much larger code and data size.
Note
that these values will vary depending on the efficiency of the compiler
and
the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  78.1K Code, 11.5K Data,  89.6K Total
    Debug Version:     164.8K Code, 69.2K Data, 234.0K Total
  Current Release:
    Non-Debug Version:  78.2K Code, 11.5K Data,  89.7K Total
    Debug Version:     164.9K Code, 69.2K Data, 234.1K Total


2) iASL Compiler/Disassembler:

Fixed a code generation problem in the constant folding optimization code
where incorrect code was generated if a constant was reduced to a buffer
object (i.e., a reduced type 5 opcode.)

Fixed a typechecking problem for the ToBuffer operator. Caused by an
incorrect return type in the internal opcode information table.

----------------------------------------
25 January 2005.  Summary of changes for version 20050125:

1) ACPI CA Core Subsystem:

Fixed a recently introduced problem with the Global Lock where the
underlying semaphore was not created.  This problem was introduced in
version 20050114, and caused an AE_AML_NO_OPERAND exception during an
Acquire() operation on _GL.

The local object cache is now optional, and is disabled by default. Both
AcpiExec and the iASL compiler enable the cache because they run in user
mode and this enhances their performance. #define
ACPI_ENABLE_OBJECT_CACHE
to enable the local cache.

Fixed an issue in the internal function AcpiUtEvaluateObject concerning
the
optional "implicit return" support where an error was returned if no
return
object was expected, but one was implicitly returned. AE_OK is now
returned
in this case and the implicitly returned object is deleted.
AcpiUtEvaluateObject is only occasionally used, and only to execute
reserved
methods such as _STA and _INI where the return type is known up front.

Fixed a few issues with the internal convert-to-integer code. It now
returns
an error if an attempt is made to convert a null string, a string of only
blanks/tabs, or a zero-length buffer. This affects both implicit
conversion
and explicit conversion via the ToInteger() operator.

The internal debug code in AcpiUtAcquireMutex has been commented out. It
is
not needed for normal operation and should increase the performance of
the
entire subsystem. The code remains in case it is needed for debug
purposes
again.

The AcpiExec source and makefile are included in the Unix/Linux package
for
the first time.

Code and Data Size: Current and previous core subsystem library sizes are
shown below. These are the code and data sizes for the acpica.lib
produced
by the Microsoft Visual C++ 6.0 compiler, and these values do not include
any ACPI driver or OSPM code. The debug version of the code includes the
debug output trace mechanism and has a much larger code and data size.
Note
that these values will vary depending on the efficiency of the compiler
and
the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  78.4K Code,  11.5K Data,   89.9K Total
    Debug Version:     165.4K Code,  69.4K Data,  234.8K Total
  Current Release:
    Non-Debug Version:  78.1K Code,  11.5K Data,   89.6K Total
    Debug Version:     164.8K Code,  69.2K Data,  234.0K Total

2) iASL Compiler/Disassembler:

Switch/Case support: A warning is now issued if the type of the Switch
value
cannot be determined at compile time. For example, Switch(Arg0) will
generate the warning, and the type is assumed to be an integer. As per
the
ACPI spec, use a construct such as Switch(ToInteger(Arg0)) to eliminate
the
warning.

Switch/Case support: Implemented support for buffer and string objects as
the switch value.  This is an ACPI 3.0 feature, now that LEqual supports
buffers and strings.

Switch/Case support: The emitted code for the LEqual() comparisons now
uses
the switch value as the first operand, not the second. The case value is
now
the second operand, and this allows the case value to be implicitly
converted to the type of the switch value, not the other way around.

Switch/Case support: Temporary variables are now emitted immediately
within
the control method, not at the global level. This means that there are
now
36 temps available per-method, not 36 temps per-module as was the case
with
the earlier implementation (_T_0 through _T_9 and _T_A through _T_Z.)

----------------------------------------
14 January 2005.  Summary of changes for version 20050114:

Added 2005 copyright to all module headers.  This affects every module in
the core subsystem, iASL compiler, and the utilities.

1) ACPI CA Core Subsystem:

Fixed an issue with the String-to-Buffer conversion code where the string
null terminator was not included in the buffer after conversion, but
there
is existing ASL that assumes the string null terminator is included. This
is
the root of the ACPI_AML_BUFFER_LIMIT regression. This problem was
introduced in the previous version when the code was updated to correctly
set the converted buffer size as per the ACPI specification. The ACPI
spec
is ambiguous and will be updated to specify that the null terminator must
be
included in the converted buffer. This also affects the ToBuffer() ASL
operator.

Fixed a problem with the Mid() ASL/AML operator where it did not work
correctly on Buffer objects. Newly created sub-buffers were not being
marked
as initialized.


Fixed a problem in AcpiTbFindTable where incorrect string compares were
performed on the OemId and OemTableId table header fields.  These fields
are
not null terminated, so strncmp is now used instead of strcmp.

Implemented a restriction on the Store() ASL/AML operator to align the
behavior with the ACPI specification.  Previously, any object could be
used
as the source operand.  Now, the only objects that may be used are
Integers,
Buffers, Strings, Packages, Object References, and DDB Handles.  If
necessary, the original behavior can be restored by enabling the
EnableInterpreterSlack flag.

Enhanced the optional "implicit return" support to allow an implicit
return
value from methods that are invoked externally via the AcpiEvaluateObject
interface.  This enables implicit returns from the _STA and _INI methods,
for example.

Changed the Revision() ASL/AML operator to return the current version of
the
AML interpreter, in the YYYYMMDD format. Previously, it incorrectly
returned
the supported ACPI version (This is the function of the _REV method).

Updated the _REV predefined method to return the currently supported
version
of ACPI, now 3.

Implemented batch mode option for the AcpiExec utility (-b).

Code and Data Size: Current and previous core subsystem library sizes are
shown below. These are the code and data sizes for the acpica.lib
produced
by the Microsoft Visual C++ 6.0 compiler, and these values do not include
any ACPI driver or OSPM code. The debug version of the code includes the
debug output trace mechanism and has a much larger code and data size.
Note
that these values will vary depending on the efficiency of the compiler
and
the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  78.3K Code,  11.5K Data,   89.8K Total
    Debug Version:     165.3K Code,  69.4K Data,  234.7K Total
  Current Release:
    Non-Debug Version:  78.4K Code,  11.5K Data,   89.9K Total
    Debug Version:     165.4K Code,  69.4K Data,  234.8K Total

----------------------------------------
10 December 2004.  Summary of changes for version 20041210:

ACPI 3.0 support is nearing completion in both the iASL compiler and the
ACPI CA core subsystem.

1) ACPI CA Core Subsystem:

Fixed a problem in the ToDecimalString operator where the resulting
string
length was incorrectly calculated. The length is now calculated exactly,
eliminating incorrect AE_STRING_LIMIT exceptions.

Fixed a problem in the ToHexString operator to allow a maximum 200
character
string to be produced.

Fixed a problem in the internal string-to-buffer and buffer-to-buffer
copy
routine where the length of the resulting buffer was not truncated to the
new size (if the target buffer already existed).

Code and Data Size: Current and previous core subsystem library sizes are
shown below. These are the code and data sizes for the acpica.lib
produced
by the Microsoft Visual C++ 6.0 compiler, and these values do not include
any ACPI driver or OSPM code. The debug version of the code includes the
debug output trace mechanism and has a much larger code and data size.
Note
that these values will vary depending on the efficiency of the compiler
and
the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  78.3K Code,  11.5K Data,   89.8K Total
    Debug Version:     164.7K Code,  68.5K Data,  233.2K Total
  Current Release:
    Non-Debug Version:  78.3K Code,  11.5K Data,   89.8K Total
    Debug Version:     165.3K Code,  69.4K Data,  234.7K Total


2) iASL Compiler/Disassembler:

Implemented the new ACPI 3.0 resource template macros - DWordSpace,
ExtendedIO, ExtendedMemory, ExtendedSpace, QWordSpace, and WordSpace.
Includes support in the disassembler.

Implemented support for the new (ACPI 3.0) parameter to the Register
macro,
AccessSize.

Fixed a problem where the _HE resource name for the Interrupt macro was
referencing bit 0 instead of bit 1.

Implemented check for maximum 255 interrupts in the Interrupt macro.

Fixed a problem with the predefined resource descriptor names where
incorrect AML code was generated if the offset within the resource buffer
was 0 or 1.  The optimizer shortened the AML code to a single byte opcode
but did not update the surrounding package lengths.

Changes to the Dma macro:  All channels within the channel list must be
in
the range 0-7.  Maximum 8 channels can be specified. BusMaster operand is
optional (default is BusMaster).

Implemented check for maximum 7 data bytes for the VendorShort macro.

The ReadWrite parameter is now optional for the Memory32 and similar
macros.

----------------------------------------
03 December 2004.  Summary of changes for version 20041203:

1) ACPI CA Core Subsystem:

The low-level field insertion/extraction code (exfldio) has been
completely
rewritten to eliminate unnecessary complexity, bugs, and boundary
conditions.

Fixed a problem in the ToInteger, ToBuffer, ToHexString, and
ToDecimalString
operators where the input operand could be inadvertently deleted if no
conversion was necessary (e.g., if the input to ToInteger was an Integer
object.)

Fixed a problem with the ToDecimalString and ToHexString where an
incorrect
exception code was returned if the resulting string would be > 200 chars.
AE_STRING_LIMIT is now returned.

Fixed a problem with the Concatenate operator where AE_OK was always
returned, even if the operation failed.

Fixed a problem in oswinxf (used by AcpiExec and iASL) to allow > 128
semaphores to be allocated.

Code and Data Size: Current and previous core subsystem library sizes are
shown below. These are the code and data sizes for the acpica.lib
produced
by the Microsoft Visual C++ 6.0 compiler, and these values do not include
any ACPI driver or OSPM code. The debug version of the code includes the
debug output trace mechanism and has a much larger code and data size.
Note
that these values will vary depending on the efficiency of the compiler
and
the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  78.5K Code,  11.5K Data,   90.0K Total
    Debug Version:     165.2K Code,  68.6K Data,  233.8K Total
  Current Release:
    Non-Debug Version:  78.3K Code,  11.5K Data,   89.8K Total
    Debug Version:     164.7K Code,  68.5K Data,  233.2K Total


2) iASL Compiler/Disassembler:

Fixed typechecking for the ObjectType and SizeOf operators.  Problem was
recently introduced in 20041119.

Fixed a problem with the ToUUID macro where the upper nybble of each
buffer
byte was inadvertently set to zero.

----------------------------------------
19 November 2004.  Summary of changes for version 20041119:

1) ACPI CA Core Subsystem:

Fixed a problem in the internal ConvertToInteger routine where new
integers
were not truncated to 32 bits for 32-bit ACPI tables. This routine
converts
buffers and strings to integers.

Implemented support to store a value to an Index() on a String object.
This
is an ACPI 2.0 feature that had not yet been implemented.

Implemented new behavior for storing objects to individual package
elements
(via the Index() operator). The previous behavior was to invoke the
implicit
conversion rules if an object was already present at the index.  The new
behavior is to simply delete any existing object and directly store the
new
object. Although the ACPI specification seems unclear on this subject,
other
ACPI implementations behave in this manner.  (This is the root of the
AE_BAD_HEX_CONSTANT issue.)

Modified the RSDP memory scan mechanism to support the extended checksum
for
ACPI 2.0 (and above) RSDPs. Note that the search continues until a valid
RSDP signature is found with a valid checksum.

Code and Data Size: Current and previous core subsystem library sizes are
shown below. These are the code and data sizes for the acpica.lib
produced
by the Microsoft Visual C++ 6.0 compiler, and these values do not include
any ACPI driver or OSPM code. The debug version of the code includes the
debug output trace mechanism and has a much larger code and data size.
Note
that these values will vary depending on the efficiency of the compiler
and
the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  78.5K Code,  11.5K Data,   90.0K Total
    Debug Version:     165.2K Code,  68.6K Data,  233.8K Total
  Current Release:
    Non-Debug Version:  78.5K Code,  11.5K Data,   90.0K Total
    Debug Version:     165.2K Code,  68.6K Data,  233.8K Total


2) iASL Compiler/Disassembler:

Fixed a missing semicolon in the aslcompiler.y file.

----------------------------------------
05 November 2004.  Summary of changes for version 20041105:

1) ACPI CA Core Subsystem:

Implemented support for FADT revision 2.  This was an interim table
(between
ACPI 1.0 and ACPI 2.0) that adds support for the FADT reset register.

Implemented optional support to allow uninitialized LocalX and ArgX
variables in a control method.  The variables are initialized to an
Integer
object with a value of zero.  This support is enabled by setting the
AcpiGbl_EnableInterpreterSlack flag to TRUE.

Implemented support for Integer objects for the SizeOf operator.  Either
4
or 8 is returned, depending on the current integer size (32-bit or 64-
bit,
depending on the parent table revision).

Fixed a problem in the implementation of the SizeOf and ObjectType
operators
where the operand was resolved to a value too early, causing incorrect
return values for some objects.

Fixed some possible memory leaks during exceptional conditions.

Code and Data Size: Current and previous core subsystem library sizes are
shown below. These are the code and data sizes for the acpica.lib
produced
by the Microsoft Visual C++ 6.0 compiler, and these values do not include
any ACPI driver or OSPM code. The debug version of the code includes the
debug output trace mechanism and has a much larger code and data size.
Note
that these values will vary depending on the efficiency of the compiler
and
the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  78.0K Code,  11.5K Data,   89.5K Total
    Debug Version:     164.8K Code,  68.6K Data,  233.4K Total
  Current Release:
    Non-Debug Version:  78.5K Code,  11.5K Data,   90.0K Total
    Debug Version:     165.2K Code,  68.6K Data,  233.8K Total


2) iASL Compiler/Disassembler:

Implemented support for all ACPI 3.0 reserved names and methods.

Implemented all ACPI 3.0 grammar elements in the front-end, including
support for semicolons.

Implemented the ACPI 3.0 Function() and ToUUID() macros

Fixed a problem in the disassembler where a Scope() operator would not be
emitted properly if the target of the scope was in another table.

----------------------------------------
15 October 2004.  Summary of changes for version 20041015:

Note:  ACPI CA is currently undergoing an in-depth and complete formal
evaluation to test/verify the following areas. Other suggestions are
welcome. This will result in an increase in the frequency of releases and
the number of bug fixes in the next few months.
  - Functional tests for all ASL/AML operators
  - All implicit/explicit type conversions
  - Bit fields and operation regions
  - 64-bit math support and 32-bit-only "truncated" math support
  - Exceptional conditions, both compiler and interpreter
  - Dynamic object deletion and memory leaks
  - ACPI 3.0 support when implemented
  - External interfaces to the ACPI subsystem


1) ACPI CA Core Subsystem:

Fixed two alignment issues on 64-bit platforms - within debug statements
in
AcpiEvGpeDetect and AcpiEvCreateGpeBlock. Removed references to the
Address
field within the non-aligned ACPI generic address structure.

Fixed a problem in the Increment and Decrement operators where incorrect
operand resolution could result in the inadvertent modification of the
original integer when the integer is passed into another method as an
argument and the arg is then incremented/decremented.

Fixed a problem in the FromBCD operator where the upper 32-bits of a 64-
bit
BCD number were truncated during conversion.

Fixed a problem in the ToDecimal operator where the length of the
resulting
string could be set incorrectly too long if the input operand was a
Buffer
object.

Fixed a problem in the Logical operators (LLess, etc.) where a NULL byte
(0)
within a buffer would prematurely terminate a compare between buffer
objects.

Added a check for string overflow (>200 characters as per the ACPI
specification) during the Concatenate operator with two string operands.

Code and Data Size: Current and previous core subsystem library sizes are
shown below. These are the code and data sizes for the acpica.lib
produced
by the Microsoft Visual C++ 6.0 compiler, and these values do not include
any ACPI driver or OSPM code. The debug version of the code includes the
debug output trace mechanism and has a much larger code and data size.
Note
that these values will vary depending on the efficiency of the compiler
and
the compiler options used during generation.

  Previous Release:
    Non-Debug Version:  77.8K Code,  11.5K Data,   89.3K Total
    Debug Version:     164.6K Code,  68.5K Data,  233.1K Total
  Current Release:
    Non-Debug Version:  78.0K Code,  11.5K Data,   89.5K Total
    Debug Version:     164.8K Code,  68.6K Data,  233.4K Total



2) iASL Compiler/Disassembler:

Allow the use of the ObjectType operator on uninitialized Locals and Args
(returns 0 as per the ACPI specification).

Fixed a problem where the compiler would fault if there was a syntax
error
in the FieldName of all of the various CreateXXXField operators.

Disallow the use of lower case letters within the EISAID macro, as per
the
ACPI specification.  All EISAID strings must be of the form "UUUNNNN"
Where
U is an uppercase letter and N is a hex digit.


----------------------------------------
06 October 2004.  Summary of changes for version 20041006:

1) ACPI CA Core Subsystem:

Implemented support for the ACPI 3.0 Timer operator. This ASL function
implements a 64-bit timer with 100 nanosecond granularity.

Defined a new OSL interface, AcpiOsGetTimer. This interface is used to
implement the ACPI 3.0 Timer operator.  This allows the host OS to
implement
the timer with the best clock available. Also, it keeps the core
subsystem
out of the clock handling business, since the host OS (usually) performs
this function.

Fixed an alignment issue on 64-bit platforms. The HwLowLevelRead(Write)
functions use a 64-bit address which is part of the packed ACPI Generic
Address Structure. Since the structure is non-aligned, the alignment
macros
are now used to extract the address to a local variable before use.

Fixed a problem where the ToInteger operator assumed all input strings
were
hexadecimal. The operator now handles both decimal strings and hex
strings
(prefixed with "0x").

Fixed a problem where the string length in the string object created as a
result of the internal ConvertToString procedure could be incorrect. This
potentially affected all implicit conversions and also the
ToDecimalString
and ToHexString operators.

Fixed two problems in the ToString operator. If the length parameter was
zero, an incorrect string object was created and the value of the input
length parameter was inadvertently changed from zero to Ones.

Fixed a problem where the optional ResourceSource string in the
ExtendedIRQ
resource macro was ignored.

Simplified the interfaces to the internal division functions, reducing
code
size and complexity.

Code and Data Size: Current and previous core subsystem library sizes are
shown below. These are the code and data sizes for the acpica.lib
produced
by the Microsoft Visual C++ 6.0 compiler, and these values do not include
any ACPI driver or OSPM code. The debug version of the code includes the
debug output trace mechanism and has a much larger code and data size.
Note
that these values will vary depending on the efficiency of the compiler
and
the compiler options used during generation.