1 /******************************************************************************
2 *
3 * Module Name: psargs - Parse AML opcode arguments
4 *
5 *****************************************************************************/
6
7 /******************************************************************************
8 *
9 * 1. Copyright Notice
10 *
11 * Some or all of this work - Copyright (c) 1999 - 2018, Intel Corp.
12 * All rights reserved.
13 *
14 * 2. License
15 *
16 * 2.1. This is your license from Intel Corp. under its intellectual property
17 * rights. You may have additional license terms from the party that provided
18 * you this software, covering your right to use that party's intellectual
19 * property rights.
20 *
21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22 * copy of the source code appearing in this file ("Covered Code") an
23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24 * base code distributed originally by Intel ("Original Intel Code") to copy,
25 * make derivatives, distribute, use and display any portion of the Covered
26 * Code in any form, with the right to sublicense such rights; and
27 *
28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29 * license (with the right to sublicense), under only those claims of Intel
30 * patents that are infringed by the Original Intel Code, to make, use, sell,
31 * offer to sell, and import the Covered Code and derivative works thereof
32 * solely to the minimum extent necessary to exercise the above copyright
33 * license, and in no event shall the patent license extend to any additions
34 * to or modifications of the Original Intel Code. No other license or right
35 * is granted directly or by implication, estoppel or otherwise;
36 *
37 * The above copyright and patent license is granted only if the following
38 * conditions are met:
39 *
40 * 3. Conditions
41 *
42 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43 * Redistribution of source code of any substantial portion of the Covered
44 * Code or modification with rights to further distribute source must include
45 * the above Copyright Notice, the above License, this list of Conditions,
46 * and the following Disclaimer and Export Compliance provision. In addition,
47 * Licensee must cause all Covered Code to which Licensee contributes to
48 * contain a file documenting the changes Licensee made to create that Covered
49 * Code and the date of any change. Licensee must include in that file the
50 * documentation of any changes made by any predecessor Licensee. Licensee
51 * must include a prominent statement that the modification is derived,
52 * directly or indirectly, from Original Intel Code.
53 *
54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55 * Redistribution of source code of any substantial portion of the Covered
56 * Code or modification without rights to further distribute source must
57 * include the following Disclaimer and Export Compliance provision in the
58 * documentation and/or other materials provided with distribution. In
59 * addition, Licensee may not authorize further sublicense of source of any
60 * portion of the Covered Code, and must include terms to the effect that the
61 * license from Licensee to its licensee is limited to the intellectual
62 * property embodied in the software Licensee provides to its licensee, and
63 * not to intellectual property embodied in modifications its licensee may
64 * make.
65 *
66 * 3.3. Redistribution of Executable. Redistribution in executable form of any
67 * substantial portion of the Covered Code or modification must reproduce the
68 * above Copyright Notice, and the following Disclaimer and Export Compliance
69 * provision in the documentation and/or other materials provided with the
70 * distribution.
71 *
72 * 3.4. Intel retains all right, title, and interest in and to the Original
73 * Intel Code.
74 *
75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76 * Intel shall be used in advertising or otherwise to promote the sale, use or
77 * other dealings in products derived from or relating to the Covered Code
78 * without prior written authorization from Intel.
79 *
80 * 4. Disclaimer and Export Compliance
81 *
82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
88 * PARTICULAR PURPOSE.
89 *
90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
97 * LIMITED REMEDY.
98 *
99 * 4.3. Licensee shall not export, either directly or indirectly, any of this
100 * software or system incorporating such software without first obtaining any
101 * required license or other approval from the U. S. Department of Commerce or
102 * any other agency or department of the United States Government. In the
103 * event Licensee exports any such software from the United States or
104 * re-exports any such software from a foreign destination, Licensee shall
105 * ensure that the distribution and export/re-export of the software is in
106 * compliance with all laws, regulations, orders, or other restrictions of the
107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108 * any of its subsidiaries will export/re-export any technical data, process,
109 * software, or service, directly or indirectly, to any country for which the
110 * United States government or any agency thereof requires an export license,
111 * other governmental approval, or letter of assurance, without first obtaining
112 * such license, approval or letter.
113 *
114 *****************************************************************************
115 *
116 * Alternatively, you may choose to be licensed under the terms of the
117 * following license:
118 *
119 * Redistribution and use in source and binary forms, with or without
120 * modification, are permitted provided that the following conditions
121 * are met:
122 * 1. Redistributions of source code must retain the above copyright
123 * notice, this list of conditions, and the following disclaimer,
124 * without modification.
125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
126 * substantially similar to the "NO WARRANTY" disclaimer below
127 * ("Disclaimer") and any redistribution must be conditioned upon
128 * including a substantially similar Disclaimer requirement for further
129 * binary redistribution.
130 * 3. Neither the names of the above-listed copyright holders nor the names
131 * of any contributors may be used to endorse or promote products derived
132 * from this software without specific prior written permission.
133 *
134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
145 *
146 * Alternatively, you may choose to be licensed under the terms of the
147 * GNU General Public License ("GPL") version 2 as published by the Free
148 * Software Foundation.
149 *
150 *****************************************************************************/
151
152 #include "acpi.h"
153 #include "accommon.h"
154 #include "acparser.h"
155 #include "amlcode.h"
156 #include "acnamesp.h"
157 #include "acdispat.h"
158 #include "acconvert.h"
159
160 #define _COMPONENT ACPI_PARSER
161 ACPI_MODULE_NAME ("psargs")
162
163 /* Local prototypes */
164
165 static UINT32
166 AcpiPsGetNextPackageLength (
167 ACPI_PARSE_STATE *ParserState);
168
169 static ACPI_PARSE_OBJECT *
170 AcpiPsGetNextField (
171 ACPI_PARSE_STATE *ParserState);
172
173
174 /*******************************************************************************
175 *
176 * FUNCTION: AcpiPsGetNextPackageLength
177 *
178 * PARAMETERS: ParserState - Current parser state object
179 *
180 * RETURN: Decoded package length. On completion, the AML pointer points
181 * past the length byte or bytes.
182 *
183 * DESCRIPTION: Decode and return a package length field.
184 * Note: Largest package length is 28 bits, from ACPI specification
185 *
186 ******************************************************************************/
187
188 static UINT32
AcpiPsGetNextPackageLength(ACPI_PARSE_STATE * ParserState)189 AcpiPsGetNextPackageLength (
190 ACPI_PARSE_STATE *ParserState)
191 {
192 UINT8 *Aml = ParserState->Aml;
193 UINT32 PackageLength = 0;
194 UINT32 ByteCount;
195 UINT8 ByteZeroMask = 0x3F; /* Default [0:5] */
196
197
198 ACPI_FUNCTION_TRACE (PsGetNextPackageLength);
199
200
201 /*
202 * Byte 0 bits [6:7] contain the number of additional bytes
203 * used to encode the package length, either 0,1,2, or 3
204 */
205 ByteCount = (Aml[0] >> 6);
206 ParserState->Aml += ((ACPI_SIZE) ByteCount + 1);
207
208 /* Get bytes 3, 2, 1 as needed */
209
210 while (ByteCount)
211 {
212 /*
213 * Final bit positions for the package length bytes:
214 * Byte3->[20:27]
215 * Byte2->[12:19]
216 * Byte1->[04:11]
217 * Byte0->[00:03]
218 */
219 PackageLength |= (Aml[ByteCount] << ((ByteCount << 3) - 4));
220
221 ByteZeroMask = 0x0F; /* Use bits [0:3] of byte 0 */
222 ByteCount--;
223 }
224
225 /* Byte 0 is a special case, either bits [0:3] or [0:5] are used */
226
227 PackageLength |= (Aml[0] & ByteZeroMask);
228 return_UINT32 (PackageLength);
229 }
230
231
232 /*******************************************************************************
233 *
234 * FUNCTION: AcpiPsGetNextPackageEnd
235 *
236 * PARAMETERS: ParserState - Current parser state object
237 *
238 * RETURN: Pointer to end-of-package +1
239 *
240 * DESCRIPTION: Get next package length and return a pointer past the end of
241 * the package. Consumes the package length field
242 *
243 ******************************************************************************/
244
245 UINT8 *
AcpiPsGetNextPackageEnd(ACPI_PARSE_STATE * ParserState)246 AcpiPsGetNextPackageEnd (
247 ACPI_PARSE_STATE *ParserState)
248 {
249 UINT8 *Start = ParserState->Aml;
250 UINT32 PackageLength;
251
252
253 ACPI_FUNCTION_TRACE (PsGetNextPackageEnd);
254
255
256 /* Function below updates ParserState->Aml */
257
258 PackageLength = AcpiPsGetNextPackageLength (ParserState);
259
260 return_PTR (Start + PackageLength); /* end of package */
261 }
262
263
264 /*******************************************************************************
265 *
266 * FUNCTION: AcpiPsGetNextNamestring
267 *
268 * PARAMETERS: ParserState - Current parser state object
269 *
270 * RETURN: Pointer to the start of the name string (pointer points into
271 * the AML.
272 *
273 * DESCRIPTION: Get next raw namestring within the AML stream. Handles all name
274 * prefix characters. Set parser state to point past the string.
275 * (Name is consumed from the AML.)
276 *
277 ******************************************************************************/
278
279 char *
AcpiPsGetNextNamestring(ACPI_PARSE_STATE * ParserState)280 AcpiPsGetNextNamestring (
281 ACPI_PARSE_STATE *ParserState)
282 {
283 UINT8 *Start = ParserState->Aml;
284 UINT8 *End = ParserState->Aml;
285
286
287 ACPI_FUNCTION_TRACE (PsGetNextNamestring);
288
289
290 /* Point past any namestring prefix characters (backslash or carat) */
291
292 while (ACPI_IS_ROOT_PREFIX (*End) ||
293 ACPI_IS_PARENT_PREFIX (*End))
294 {
295 End++;
296 }
297
298 /* Decode the path prefix character */
299
300 switch (*End)
301 {
302 case 0:
303
304 /* NullName */
305
306 if (End == Start)
307 {
308 Start = NULL;
309 }
310 End++;
311 break;
312
313 case AML_DUAL_NAME_PREFIX:
314
315 /* Two name segments */
316
317 End += 1 + (2 * ACPI_NAME_SIZE);
318 break;
319
320 case AML_MULTI_NAME_PREFIX:
321
322 /* Multiple name segments, 4 chars each, count in next byte */
323
324 End += 2 + (*(End + 1) * ACPI_NAME_SIZE);
325 break;
326
327 default:
328
329 /* Single name segment */
330
331 End += ACPI_NAME_SIZE;
332 break;
333 }
334
335 ParserState->Aml = End;
336 return_PTR ((char *) Start);
337 }
338
339
340 /*******************************************************************************
341 *
342 * FUNCTION: AcpiPsGetNextNamepath
343 *
344 * PARAMETERS: ParserState - Current parser state object
345 * Arg - Where the namepath will be stored
346 * ArgCount - If the namepath points to a control method
347 * the method's argument is returned here.
348 * PossibleMethodCall - Whether the namepath can possibly be the
349 * start of a method call
350 *
351 * RETURN: Status
352 *
353 * DESCRIPTION: Get next name (if method call, return # of required args).
354 * Names are looked up in the internal namespace to determine
355 * if the name represents a control method. If a method
356 * is found, the number of arguments to the method is returned.
357 * This information is critical for parsing to continue correctly.
358 *
359 ******************************************************************************/
360
361 ACPI_STATUS
AcpiPsGetNextNamepath(ACPI_WALK_STATE * WalkState,ACPI_PARSE_STATE * ParserState,ACPI_PARSE_OBJECT * Arg,BOOLEAN PossibleMethodCall)362 AcpiPsGetNextNamepath (
363 ACPI_WALK_STATE *WalkState,
364 ACPI_PARSE_STATE *ParserState,
365 ACPI_PARSE_OBJECT *Arg,
366 BOOLEAN PossibleMethodCall)
367 {
368 ACPI_STATUS Status;
369 char *Path;
370 ACPI_PARSE_OBJECT *NameOp;
371 ACPI_OPERAND_OBJECT *MethodDesc;
372 ACPI_NAMESPACE_NODE *Node;
373 UINT8 *Start = ParserState->Aml;
374
375
376 ACPI_FUNCTION_TRACE (PsGetNextNamepath);
377
378
379 Path = AcpiPsGetNextNamestring (ParserState);
380 AcpiPsInitOp (Arg, AML_INT_NAMEPATH_OP);
381
382 /* Null path case is allowed, just exit */
383
384 if (!Path)
385 {
386 Arg->Common.Value.Name = Path;
387 return_ACPI_STATUS (AE_OK);
388 }
389
390 /*
391 * Lookup the name in the internal namespace, starting with the current
392 * scope. We don't want to add anything new to the namespace here,
393 * however, so we use MODE_EXECUTE.
394 * Allow searching of the parent tree, but don't open a new scope -
395 * we just want to lookup the object (must be mode EXECUTE to perform
396 * the upsearch)
397 */
398 Status = AcpiNsLookup (WalkState->ScopeInfo, Path,
399 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
400 ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, NULL, &Node);
401
402 /*
403 * If this name is a control method invocation, we must
404 * setup the method call
405 */
406 if (ACPI_SUCCESS (Status) &&
407 PossibleMethodCall &&
408 (Node->Type == ACPI_TYPE_METHOD))
409 {
410 if ((GET_CURRENT_ARG_TYPE (WalkState->ArgTypes) == ARGP_SUPERNAME) ||
411 (GET_CURRENT_ARG_TYPE (WalkState->ArgTypes) == ARGP_TARGET))
412 {
413 /*
414 * AcpiPsGetNextNamestring has increased the AML pointer past
415 * the method invocation namestring, so we need to restore the
416 * saved AML pointer back to the original method invocation
417 * namestring.
418 */
419 WalkState->ParserState.Aml = Start;
420 WalkState->ArgCount = 1;
421 AcpiPsInitOp (Arg, AML_INT_METHODCALL_OP);
422 }
423
424 /* This name is actually a control method invocation */
425
426 MethodDesc = AcpiNsGetAttachedObject (Node);
427 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
428 "Control Method invocation %4.4s - %p Desc %p Path=%p\n",
429 Node->Name.Ascii, Node, MethodDesc, Path));
430
431 NameOp = AcpiPsAllocOp (AML_INT_NAMEPATH_OP, Start);
432 if (!NameOp)
433 {
434 return_ACPI_STATUS (AE_NO_MEMORY);
435 }
436
437 /* Change Arg into a METHOD CALL and attach name to it */
438
439 AcpiPsInitOp (Arg, AML_INT_METHODCALL_OP);
440 NameOp->Common.Value.Name = Path;
441
442 /* Point METHODCALL/NAME to the METHOD Node */
443
444 NameOp->Common.Node = Node;
445 AcpiPsAppendArg (Arg, NameOp);
446
447 if (!MethodDesc)
448 {
449 ACPI_ERROR ((AE_INFO,
450 "Control Method %p has no attached object",
451 Node));
452 return_ACPI_STATUS (AE_AML_INTERNAL);
453 }
454
455 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
456 "Control Method - %p Args %X\n",
457 Node, MethodDesc->Method.ParamCount));
458
459 /* Get the number of arguments to expect */
460
461 WalkState->ArgCount = MethodDesc->Method.ParamCount;
462 return_ACPI_STATUS (AE_OK);
463 }
464
465 /*
466 * Special handling if the name was not found during the lookup -
467 * some NotFound cases are allowed
468 */
469 if (Status == AE_NOT_FOUND)
470 {
471 /* 1) NotFound is ok during load pass 1/2 (allow forward references) */
472
473 if ((WalkState->ParseFlags & ACPI_PARSE_MODE_MASK) !=
474 ACPI_PARSE_EXECUTE)
475 {
476 Status = AE_OK;
477 }
478
479 /* 2) NotFound during a CondRefOf(x) is ok by definition */
480
481 else if (WalkState->Op->Common.AmlOpcode == AML_CONDITIONAL_REF_OF_OP)
482 {
483 Status = AE_OK;
484 }
485
486 /*
487 * 3) NotFound while building a Package is ok at this point, we
488 * may flag as an error later if slack mode is not enabled.
489 * (Some ASL code depends on allowing this behavior)
490 */
491 else if ((Arg->Common.Parent) &&
492 ((Arg->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||
493 (Arg->Common.Parent->Common.AmlOpcode == AML_VARIABLE_PACKAGE_OP)))
494 {
495 Status = AE_OK;
496 }
497 }
498
499 /* Final exception check (may have been changed from code above) */
500
501 if (ACPI_FAILURE (Status))
502 {
503 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, Path, Status);
504
505 if ((WalkState->ParseFlags & ACPI_PARSE_MODE_MASK) ==
506 ACPI_PARSE_EXECUTE)
507 {
508 /* Report a control method execution error */
509
510 Status = AcpiDsMethodError (Status, WalkState);
511 }
512 }
513
514 /* Save the namepath */
515
516 Arg->Common.Value.Name = Path;
517 return_ACPI_STATUS (Status);
518 }
519
520
521 /*******************************************************************************
522 *
523 * FUNCTION: AcpiPsGetNextSimpleArg
524 *
525 * PARAMETERS: ParserState - Current parser state object
526 * ArgType - The argument type (AML_*_ARG)
527 * Arg - Where the argument is returned
528 *
529 * RETURN: None
530 *
531 * DESCRIPTION: Get the next simple argument (constant, string, or namestring)
532 *
533 ******************************************************************************/
534
535 void
AcpiPsGetNextSimpleArg(ACPI_PARSE_STATE * ParserState,UINT32 ArgType,ACPI_PARSE_OBJECT * Arg)536 AcpiPsGetNextSimpleArg (
537 ACPI_PARSE_STATE *ParserState,
538 UINT32 ArgType,
539 ACPI_PARSE_OBJECT *Arg)
540 {
541 UINT32 Length;
542 UINT16 Opcode;
543 UINT8 *Aml = ParserState->Aml;
544
545
546 ACPI_FUNCTION_TRACE_U32 (PsGetNextSimpleArg, ArgType);
547
548
549 switch (ArgType)
550 {
551 case ARGP_BYTEDATA:
552
553 /* Get 1 byte from the AML stream */
554
555 Opcode = AML_BYTE_OP;
556 Arg->Common.Value.Integer = (UINT64) *Aml;
557 Length = 1;
558 break;
559
560 case ARGP_WORDDATA:
561
562 /* Get 2 bytes from the AML stream */
563
564 Opcode = AML_WORD_OP;
565 ACPI_MOVE_16_TO_64 (&Arg->Common.Value.Integer, Aml);
566 Length = 2;
567 break;
568
569 case ARGP_DWORDDATA:
570
571 /* Get 4 bytes from the AML stream */
572
573 Opcode = AML_DWORD_OP;
574 ACPI_MOVE_32_TO_64 (&Arg->Common.Value.Integer, Aml);
575 Length = 4;
576 break;
577
578 case ARGP_QWORDDATA:
579
580 /* Get 8 bytes from the AML stream */
581
582 Opcode = AML_QWORD_OP;
583 ACPI_MOVE_64_TO_64 (&Arg->Common.Value.Integer, Aml);
584 Length = 8;
585 break;
586
587 case ARGP_CHARLIST:
588
589 /* Get a pointer to the string, point past the string */
590
591 Opcode = AML_STRING_OP;
592 Arg->Common.Value.String = ACPI_CAST_PTR (char, Aml);
593
594 /* Find the null terminator */
595
596 Length = 0;
597 while (Aml[Length])
598 {
599 Length++;
600 }
601 Length++;
602 break;
603
604 case ARGP_NAME:
605 case ARGP_NAMESTRING:
606
607 AcpiPsInitOp (Arg, AML_INT_NAMEPATH_OP);
608 Arg->Common.Value.Name = AcpiPsGetNextNamestring (ParserState);
609 return_VOID;
610
611 default:
612
613 ACPI_ERROR ((AE_INFO, "Invalid ArgType 0x%X", ArgType));
614 return_VOID;
615 }
616
617 AcpiPsInitOp (Arg, Opcode);
618 ParserState->Aml += Length;
619 return_VOID;
620 }
621
622
623 /*******************************************************************************
624 *
625 * FUNCTION: AcpiPsGetNextField
626 *
627 * PARAMETERS: ParserState - Current parser state object
628 *
629 * RETURN: A newly allocated FIELD op
630 *
631 * DESCRIPTION: Get next field (NamedField, ReservedField, or AccessField)
632 *
633 ******************************************************************************/
634
635 static ACPI_PARSE_OBJECT *
AcpiPsGetNextField(ACPI_PARSE_STATE * ParserState)636 AcpiPsGetNextField (
637 ACPI_PARSE_STATE *ParserState)
638 {
639 UINT8 *Aml;
640 ACPI_PARSE_OBJECT *Field;
641 ACPI_PARSE_OBJECT *Arg = NULL;
642 UINT16 Opcode;
643 UINT32 Name;
644 UINT8 AccessType;
645 UINT8 AccessAttribute;
646 UINT8 AccessLength;
647 UINT32 PkgLength;
648 UINT8 *PkgEnd;
649 UINT32 BufferLength;
650
651
652 ACPI_FUNCTION_TRACE (PsGetNextField);
653
654
655 ASL_CV_CAPTURE_COMMENTS_ONLY (ParserState);
656 Aml = ParserState->Aml;
657
658 /* Determine field type */
659
660 switch (ACPI_GET8 (ParserState->Aml))
661 {
662 case AML_FIELD_OFFSET_OP:
663
664 Opcode = AML_INT_RESERVEDFIELD_OP;
665 ParserState->Aml++;
666 break;
667
668 case AML_FIELD_ACCESS_OP:
669
670 Opcode = AML_INT_ACCESSFIELD_OP;
671 ParserState->Aml++;
672 break;
673
674 case AML_FIELD_CONNECTION_OP:
675
676 Opcode = AML_INT_CONNECTION_OP;
677 ParserState->Aml++;
678 break;
679
680 case AML_FIELD_EXT_ACCESS_OP:
681
682 Opcode = AML_INT_EXTACCESSFIELD_OP;
683 ParserState->Aml++;
684 break;
685
686 default:
687
688 Opcode = AML_INT_NAMEDFIELD_OP;
689 break;
690 }
691
692 /* Allocate a new field op */
693
694 Field = AcpiPsAllocOp (Opcode, Aml);
695 if (!Field)
696 {
697 return_PTR (NULL);
698 }
699
700 /* Decode the field type */
701
702 ASL_CV_CAPTURE_COMMENTS_ONLY (ParserState);
703 switch (Opcode)
704 {
705 case AML_INT_NAMEDFIELD_OP:
706
707 /* Get the 4-character name */
708
709 ACPI_MOVE_32_TO_32 (&Name, ParserState->Aml);
710 AcpiPsSetName (Field, Name);
711 ParserState->Aml += ACPI_NAME_SIZE;
712
713
714 ASL_CV_CAPTURE_COMMENTS_ONLY (ParserState);
715
716 #ifdef ACPI_ASL_COMPILER
717 /*
718 * Because the package length isn't represented as a parse tree object,
719 * take comments surrounding this and add to the previously created
720 * parse node.
721 */
722 if (Field->Common.InlineComment)
723 {
724 Field->Common.NameComment = Field->Common.InlineComment;
725 }
726 Field->Common.InlineComment = AcpiGbl_CurrentInlineComment;
727 AcpiGbl_CurrentInlineComment = NULL;
728 #endif
729
730 /* Get the length which is encoded as a package length */
731
732 Field->Common.Value.Size = AcpiPsGetNextPackageLength (ParserState);
733 break;
734
735
736 case AML_INT_RESERVEDFIELD_OP:
737
738 /* Get the length which is encoded as a package length */
739
740 Field->Common.Value.Size = AcpiPsGetNextPackageLength (ParserState);
741 break;
742
743
744 case AML_INT_ACCESSFIELD_OP:
745 case AML_INT_EXTACCESSFIELD_OP:
746
747 /*
748 * Get AccessType and AccessAttrib and merge into the field Op
749 * AccessType is first operand, AccessAttribute is second. stuff
750 * these bytes into the node integer value for convenience.
751 */
752
753 /* Get the two bytes (Type/Attribute) */
754
755 AccessType = ACPI_GET8 (ParserState->Aml);
756 ParserState->Aml++;
757 AccessAttribute = ACPI_GET8 (ParserState->Aml);
758 ParserState->Aml++;
759
760 Field->Common.Value.Integer = (UINT8) AccessType;
761 Field->Common.Value.Integer |= (UINT16) (AccessAttribute << 8);
762
763 /* This opcode has a third byte, AccessLength */
764
765 if (Opcode == AML_INT_EXTACCESSFIELD_OP)
766 {
767 AccessLength = ACPI_GET8 (ParserState->Aml);
768 ParserState->Aml++;
769
770 Field->Common.Value.Integer |= (UINT32) (AccessLength << 16);
771 }
772 break;
773
774
775 case AML_INT_CONNECTION_OP:
776
777 /*
778 * Argument for Connection operator can be either a Buffer
779 * (resource descriptor), or a NameString.
780 */
781 Aml = ParserState->Aml;
782 if (ACPI_GET8 (ParserState->Aml) == AML_BUFFER_OP)
783 {
784 ParserState->Aml++;
785
786 ASL_CV_CAPTURE_COMMENTS_ONLY (ParserState);
787 PkgEnd = ParserState->Aml;
788 PkgLength = AcpiPsGetNextPackageLength (ParserState);
789 PkgEnd += PkgLength;
790
791 ASL_CV_CAPTURE_COMMENTS_ONLY (ParserState);
792 if (ParserState->Aml < PkgEnd)
793 {
794 /* Non-empty list */
795
796 Arg = AcpiPsAllocOp (AML_INT_BYTELIST_OP, Aml);
797 if (!Arg)
798 {
799 AcpiPsFreeOp (Field);
800 return_PTR (NULL);
801 }
802
803 /* Get the actual buffer length argument */
804
805 Opcode = ACPI_GET8 (ParserState->Aml);
806 ParserState->Aml++;
807
808 ASL_CV_CAPTURE_COMMENTS_ONLY (ParserState);
809 switch (Opcode)
810 {
811 case AML_BYTE_OP: /* AML_BYTEDATA_ARG */
812
813 BufferLength = ACPI_GET8 (ParserState->Aml);
814 ParserState->Aml += 1;
815 break;
816
817 case AML_WORD_OP: /* AML_WORDDATA_ARG */
818
819 BufferLength = ACPI_GET16 (ParserState->Aml);
820 ParserState->Aml += 2;
821 break;
822
823 case AML_DWORD_OP: /* AML_DWORDATA_ARG */
824
825 BufferLength = ACPI_GET32 (ParserState->Aml);
826 ParserState->Aml += 4;
827 break;
828
829 default:
830
831 BufferLength = 0;
832 break;
833 }
834
835 /* Fill in bytelist data */
836
837 ASL_CV_CAPTURE_COMMENTS_ONLY (ParserState);
838 Arg->Named.Value.Size = BufferLength;
839 Arg->Named.Data = ParserState->Aml;
840 }
841
842 /* Skip to End of byte data */
843
844 ParserState->Aml = PkgEnd;
845 }
846 else
847 {
848 Arg = AcpiPsAllocOp (AML_INT_NAMEPATH_OP, Aml);
849 if (!Arg)
850 {
851 AcpiPsFreeOp (Field);
852 return_PTR (NULL);
853 }
854
855 /* Get the Namestring argument */
856
857 Arg->Common.Value.Name = AcpiPsGetNextNamestring (ParserState);
858 }
859
860 /* Link the buffer/namestring to parent (CONNECTION_OP) */
861
862 AcpiPsAppendArg (Field, Arg);
863 break;
864
865
866 default:
867
868 /* Opcode was set in previous switch */
869 break;
870 }
871
872 return_PTR (Field);
873 }
874
875
876 /*******************************************************************************
877 *
878 * FUNCTION: AcpiPsGetNextArg
879 *
880 * PARAMETERS: WalkState - Current state
881 * ParserState - Current parser state object
882 * ArgType - The argument type (AML_*_ARG)
883 * ReturnArg - Where the next arg is returned
884 *
885 * RETURN: Status, and an op object containing the next argument.
886 *
887 * DESCRIPTION: Get next argument (including complex list arguments that require
888 * pushing the parser stack)
889 *
890 ******************************************************************************/
891
892 ACPI_STATUS
AcpiPsGetNextArg(ACPI_WALK_STATE * WalkState,ACPI_PARSE_STATE * ParserState,UINT32 ArgType,ACPI_PARSE_OBJECT ** ReturnArg)893 AcpiPsGetNextArg (
894 ACPI_WALK_STATE *WalkState,
895 ACPI_PARSE_STATE *ParserState,
896 UINT32 ArgType,
897 ACPI_PARSE_OBJECT **ReturnArg)
898 {
899 ACPI_PARSE_OBJECT *Arg = NULL;
900 ACPI_PARSE_OBJECT *Prev = NULL;
901 ACPI_PARSE_OBJECT *Field;
902 UINT32 Subop;
903 ACPI_STATUS Status = AE_OK;
904
905
906 ACPI_FUNCTION_TRACE_PTR (PsGetNextArg, ParserState);
907
908
909 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
910 "Expected argument type ARGP: %s (%2.2X)\n",
911 AcpiUtGetArgumentTypeName (ArgType), ArgType));
912
913 switch (ArgType)
914 {
915 case ARGP_BYTEDATA:
916 case ARGP_WORDDATA:
917 case ARGP_DWORDDATA:
918 case ARGP_CHARLIST:
919 case ARGP_NAME:
920 case ARGP_NAMESTRING:
921
922 /* Constants, strings, and namestrings are all the same size */
923
924 Arg = AcpiPsAllocOp (AML_BYTE_OP, ParserState->Aml);
925 if (!Arg)
926 {
927 return_ACPI_STATUS (AE_NO_MEMORY);
928 }
929
930 AcpiPsGetNextSimpleArg (ParserState, ArgType, Arg);
931 break;
932
933 case ARGP_PKGLENGTH:
934
935 /* Package length, nothing returned */
936
937 ParserState->PkgEnd = AcpiPsGetNextPackageEnd (ParserState);
938 break;
939
940 case ARGP_FIELDLIST:
941
942 if (ParserState->Aml < ParserState->PkgEnd)
943 {
944 /* Non-empty list */
945
946 while (ParserState->Aml < ParserState->PkgEnd)
947 {
948 Field = AcpiPsGetNextField (ParserState);
949 if (!Field)
950 {
951 return_ACPI_STATUS (AE_NO_MEMORY);
952 }
953
954 if (Prev)
955 {
956 Prev->Common.Next = Field;
957 }
958 else
959 {
960 Arg = Field;
961 }
962 Prev = Field;
963 }
964
965 /* Skip to End of byte data */
966
967 ParserState->Aml = ParserState->PkgEnd;
968 }
969 break;
970
971 case ARGP_BYTELIST:
972
973 if (ParserState->Aml < ParserState->PkgEnd)
974 {
975 /* Non-empty list */
976
977 Arg = AcpiPsAllocOp (AML_INT_BYTELIST_OP,
978 ParserState->Aml);
979 if (!Arg)
980 {
981 return_ACPI_STATUS (AE_NO_MEMORY);
982 }
983
984 /* Fill in bytelist data */
985
986 Arg->Common.Value.Size = (UINT32)
987 ACPI_PTR_DIFF (ParserState->PkgEnd, ParserState->Aml);
988 Arg->Named.Data = ParserState->Aml;
989
990 /* Skip to End of byte data */
991
992 ParserState->Aml = ParserState->PkgEnd;
993 }
994 break;
995
996 case ARGP_SIMPLENAME:
997 case ARGP_NAME_OR_REF:
998
999 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
1000 "**** SimpleName/NameOrRef: %s (%2.2X)\n",
1001 AcpiUtGetArgumentTypeName (ArgType), ArgType));
1002
1003 Subop = AcpiPsPeekOpcode (ParserState);
1004 if (Subop == 0 ||
1005 AcpiPsIsLeadingChar (Subop) ||
1006 ACPI_IS_ROOT_PREFIX (Subop) ||
1007 ACPI_IS_PARENT_PREFIX (Subop))
1008 {
1009 /* NullName or NameString */
1010
1011 Arg = AcpiPsAllocOp (AML_INT_NAMEPATH_OP, ParserState->Aml);
1012 if (!Arg)
1013 {
1014 return_ACPI_STATUS (AE_NO_MEMORY);
1015 }
1016
1017 Status = AcpiPsGetNextNamepath (WalkState, ParserState,
1018 Arg, ACPI_NOT_METHOD_CALL);
1019 }
1020 else
1021 {
1022 /* Single complex argument, nothing returned */
1023
1024 WalkState->ArgCount = 1;
1025 }
1026 break;
1027
1028 case ARGP_TARGET:
1029 case ARGP_SUPERNAME:
1030
1031 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
1032 "**** Target/Supername: %s (%2.2X)\n",
1033 AcpiUtGetArgumentTypeName (ArgType), ArgType));
1034
1035 Subop = AcpiPsPeekOpcode (ParserState);
1036 if (Subop == 0 ||
1037 AcpiPsIsLeadingChar (Subop) ||
1038 ACPI_IS_ROOT_PREFIX (Subop) ||
1039 ACPI_IS_PARENT_PREFIX (Subop))
1040 {
1041 /* NULL target (zero). Convert to a NULL namepath */
1042
1043 Arg = AcpiPsAllocOp (AML_INT_NAMEPATH_OP, ParserState->Aml);
1044 if (!Arg)
1045 {
1046 return_ACPI_STATUS (AE_NO_MEMORY);
1047 }
1048
1049 Status = AcpiPsGetNextNamepath (WalkState, ParserState,
1050 Arg, ACPI_POSSIBLE_METHOD_CALL);
1051
1052 if (Arg->Common.AmlOpcode == AML_INT_METHODCALL_OP)
1053 {
1054 /* Free method call op and corresponding namestring sub-ob */
1055
1056 AcpiPsFreeOp (Arg->Common.Value.Arg);
1057 AcpiPsFreeOp (Arg);
1058 Arg = NULL;
1059 WalkState->ArgCount = 1;
1060 }
1061 }
1062 else
1063 {
1064 /* Single complex argument, nothing returned */
1065
1066 WalkState->ArgCount = 1;
1067 }
1068 break;
1069
1070 case ARGP_DATAOBJ:
1071 case ARGP_TERMARG:
1072
1073 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
1074 "**** TermArg/DataObj: %s (%2.2X)\n",
1075 AcpiUtGetArgumentTypeName (ArgType), ArgType));
1076
1077 /* Single complex argument, nothing returned */
1078
1079 WalkState->ArgCount = 1;
1080 break;
1081
1082 case ARGP_DATAOBJLIST:
1083 case ARGP_TERMLIST:
1084 case ARGP_OBJLIST:
1085
1086 if (ParserState->Aml < ParserState->PkgEnd)
1087 {
1088 /* Non-empty list of variable arguments, nothing returned */
1089
1090 WalkState->ArgCount = ACPI_VAR_ARGS;
1091 }
1092 break;
1093
1094 default:
1095
1096 ACPI_ERROR ((AE_INFO, "Invalid ArgType: 0x%X", ArgType));
1097 Status = AE_AML_OPERAND_TYPE;
1098 break;
1099 }
1100
1101 *ReturnArg = Arg;
1102 return_ACPI_STATUS (Status);
1103 }
1104