1 /******************************************************************************
2 *
3 * Module Name: psloop - Main AML parse loop
4 *
5 *****************************************************************************/
6
7 /******************************************************************************
8 *
9 * 1. Copyright Notice
10 *
11 * Some or all of this work - Copyright (c) 1999 - 2023, 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 /*
153 * Parse the AML and build an operation tree as most interpreters, (such as
154 * Perl) do. Parsing is done by hand rather than with a YACC generated parser
155 * to tightly constrain stack and dynamic memory usage. Parsing is kept
156 * flexible and the code fairly compact by parsing based on a list of AML
157 * opcode templates in AmlOpInfo[].
158 */
159
160 #include <contrib/dev/acpica/include/acpi.h>
161 #include <contrib/dev/acpica/include/accommon.h>
162 #include <contrib/dev/acpica/include/acinterp.h>
163 #include <contrib/dev/acpica/include/acparser.h>
164 #include <contrib/dev/acpica/include/acdispat.h>
165 #include <contrib/dev/acpica/include/amlcode.h>
166 #include <contrib/dev/acpica/include/acconvert.h>
167 #include <contrib/dev/acpica/include/acnamesp.h>
168
169 #define _COMPONENT ACPI_PARSER
170 ACPI_MODULE_NAME ("psloop")
171
172
173 /* Local prototypes */
174
175 static ACPI_STATUS
176 AcpiPsGetArguments (
177 ACPI_WALK_STATE *WalkState,
178 UINT8 *AmlOpStart,
179 ACPI_PARSE_OBJECT *Op);
180
181
182 /*******************************************************************************
183 *
184 * FUNCTION: AcpiPsGetArguments
185 *
186 * PARAMETERS: WalkState - Current state
187 * AmlOpStart - Op start in AML
188 * Op - Current Op
189 *
190 * RETURN: Status
191 *
192 * DESCRIPTION: Get arguments for passed Op.
193 *
194 ******************************************************************************/
195
196 static ACPI_STATUS
AcpiPsGetArguments(ACPI_WALK_STATE * WalkState,UINT8 * AmlOpStart,ACPI_PARSE_OBJECT * Op)197 AcpiPsGetArguments (
198 ACPI_WALK_STATE *WalkState,
199 UINT8 *AmlOpStart,
200 ACPI_PARSE_OBJECT *Op)
201 {
202 ACPI_STATUS Status = AE_OK;
203 ACPI_PARSE_OBJECT *Arg = NULL;
204
205
206 ACPI_FUNCTION_TRACE_PTR (PsGetArguments, WalkState);
207
208
209 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
210 "Get arguments for opcode [%s]\n", Op->Common.AmlOpName));
211
212 switch (Op->Common.AmlOpcode)
213 {
214 case AML_BYTE_OP: /* AML_BYTEDATA_ARG */
215 case AML_WORD_OP: /* AML_WORDDATA_ARG */
216 case AML_DWORD_OP: /* AML_DWORDATA_ARG */
217 case AML_QWORD_OP: /* AML_QWORDATA_ARG */
218 case AML_STRING_OP: /* AML_ASCIICHARLIST_ARG */
219
220 /* Fill in constant or string argument directly */
221
222 AcpiPsGetNextSimpleArg (&(WalkState->ParserState),
223 GET_CURRENT_ARG_TYPE (WalkState->ArgTypes), Op);
224 break;
225
226 case AML_INT_NAMEPATH_OP: /* AML_NAMESTRING_ARG */
227
228 Status = AcpiPsGetNextNamepath (WalkState,
229 &(WalkState->ParserState), Op, ACPI_POSSIBLE_METHOD_CALL);
230 if (ACPI_FAILURE (Status))
231 {
232 return_ACPI_STATUS (Status);
233 }
234
235 WalkState->ArgTypes = 0;
236 break;
237
238 default:
239 /*
240 * Op is not a constant or string, append each argument to the Op
241 */
242 while (GET_CURRENT_ARG_TYPE (WalkState->ArgTypes) &&
243 !WalkState->ArgCount)
244 {
245 WalkState->Aml = WalkState->ParserState.Aml;
246
247 switch (Op->Common.AmlOpcode)
248 {
249 case AML_METHOD_OP:
250 case AML_BUFFER_OP:
251 case AML_PACKAGE_OP:
252 case AML_VARIABLE_PACKAGE_OP:
253 case AML_WHILE_OP:
254
255 break;
256
257 default:
258
259 ASL_CV_CAPTURE_COMMENTS (WalkState);
260 break;
261 }
262
263 Status = AcpiPsGetNextArg (WalkState, &(WalkState->ParserState),
264 GET_CURRENT_ARG_TYPE (WalkState->ArgTypes), &Arg);
265 if (ACPI_FAILURE (Status))
266 {
267 return_ACPI_STATUS (Status);
268 }
269
270 if (Arg)
271 {
272 AcpiPsAppendArg (Op, Arg);
273 }
274
275 INCREMENT_ARG_LIST (WalkState->ArgTypes);
276 }
277
278 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
279 "Final argument count: %8.8X pass %u\n",
280 WalkState->ArgCount, WalkState->PassNumber));
281
282 /* Special processing for certain opcodes */
283
284 switch (Op->Common.AmlOpcode)
285 {
286 case AML_METHOD_OP:
287 /*
288 * Skip parsing of control method because we don't have enough
289 * info in the first pass to parse it correctly.
290 *
291 * Save the length and address of the body
292 */
293 Op->Named.Data = WalkState->ParserState.Aml;
294 Op->Named.Length = (UINT32)
295 (WalkState->ParserState.PkgEnd - WalkState->ParserState.Aml);
296
297 /* Skip body of method */
298
299 WalkState->ParserState.Aml = WalkState->ParserState.PkgEnd;
300 WalkState->ArgCount = 0;
301 break;
302
303 case AML_BUFFER_OP:
304 case AML_PACKAGE_OP:
305 case AML_VARIABLE_PACKAGE_OP:
306
307 if ((Op->Common.Parent) &&
308 (Op->Common.Parent->Common.AmlOpcode == AML_NAME_OP) &&
309 (WalkState->PassNumber <= ACPI_IMODE_LOAD_PASS2))
310 {
311 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
312 "Setup Package/Buffer: Pass %u, AML Ptr: %p\n",
313 WalkState->PassNumber, AmlOpStart));
314
315 /*
316 * Skip parsing of Buffers and Packages because we don't have
317 * enough info in the first pass to parse them correctly.
318 */
319 Op->Named.Data = AmlOpStart;
320 Op->Named.Length = (UINT32)
321 (WalkState->ParserState.PkgEnd - AmlOpStart);
322
323 /* Skip body */
324
325 WalkState->ParserState.Aml = WalkState->ParserState.PkgEnd;
326 WalkState->ArgCount = 0;
327 }
328 break;
329
330 case AML_WHILE_OP:
331
332 if (WalkState->ControlState)
333 {
334 WalkState->ControlState->Control.PackageEnd =
335 WalkState->ParserState.PkgEnd;
336 }
337 break;
338
339 default:
340
341 /* No action for all other opcodes */
342
343 break;
344 }
345
346 break;
347 }
348
349 return_ACPI_STATUS (AE_OK);
350 }
351
352
353 /*******************************************************************************
354 *
355 * FUNCTION: AcpiPsParseLoop
356 *
357 * PARAMETERS: WalkState - Current state
358 *
359 * RETURN: Status
360 *
361 * DESCRIPTION: Parse AML (pointed to by the current parser state) and return
362 * a tree of ops.
363 *
364 ******************************************************************************/
365
366 ACPI_STATUS
AcpiPsParseLoop(ACPI_WALK_STATE * WalkState)367 AcpiPsParseLoop (
368 ACPI_WALK_STATE *WalkState)
369 {
370 ACPI_STATUS Status = AE_OK;
371 ACPI_PARSE_OBJECT *Op = NULL; /* current op */
372 ACPI_PARSE_STATE *ParserState;
373 UINT8 *AmlOpStart = NULL;
374 UINT8 OpcodeLength;
375
376
377 ACPI_FUNCTION_TRACE_PTR (PsParseLoop, WalkState);
378
379
380 if (WalkState->DescendingCallback == NULL)
381 {
382 return_ACPI_STATUS (AE_BAD_PARAMETER);
383 }
384
385 ParserState = &WalkState->ParserState;
386 WalkState->ArgTypes = 0;
387
388 #ifndef ACPI_CONSTANT_EVAL_ONLY
389
390 if (WalkState->WalkType & ACPI_WALK_METHOD_RESTART)
391 {
392 /* We are restarting a preempted control method */
393
394 if (AcpiPsHasCompletedScope (ParserState))
395 {
396 /*
397 * We must check if a predicate to an IF or WHILE statement
398 * was just completed
399 */
400 if ((ParserState->Scope->ParseScope.Op) &&
401 ((ParserState->Scope->ParseScope.Op->Common.AmlOpcode == AML_IF_OP) ||
402 (ParserState->Scope->ParseScope.Op->Common.AmlOpcode == AML_WHILE_OP)) &&
403 (WalkState->ControlState) &&
404 (WalkState->ControlState->Common.State ==
405 ACPI_CONTROL_PREDICATE_EXECUTING))
406 {
407 /*
408 * A predicate was just completed, get the value of the
409 * predicate and branch based on that value
410 */
411 WalkState->Op = NULL;
412 Status = AcpiDsGetPredicateValue (WalkState, ACPI_TO_POINTER (TRUE));
413 if (ACPI_FAILURE (Status) && !ACPI_CNTL_EXCEPTION (Status))
414 {
415 if (Status == AE_AML_NO_RETURN_VALUE)
416 {
417 ACPI_EXCEPTION ((AE_INFO, Status,
418 "Invoked method did not return a value"));
419 }
420
421 ACPI_EXCEPTION ((AE_INFO, Status, "GetPredicate Failed"));
422 return_ACPI_STATUS (Status);
423 }
424
425 Status = AcpiPsNextParseState (WalkState, Op, Status);
426 }
427
428 AcpiPsPopScope (ParserState, &Op,
429 &WalkState->ArgTypes, &WalkState->ArgCount);
430 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Popped scope, Op=%p\n", Op));
431 }
432 else if (WalkState->PrevOp)
433 {
434 /* We were in the middle of an op */
435
436 Op = WalkState->PrevOp;
437 WalkState->ArgTypes = WalkState->PrevArgTypes;
438 }
439 }
440 #endif
441
442 /* Iterative parsing loop, while there is more AML to process: */
443
444 while ((ParserState->Aml < ParserState->AmlEnd) || (Op))
445 {
446 ASL_CV_CAPTURE_COMMENTS (WalkState);
447
448 AmlOpStart = ParserState->Aml;
449 if (!Op)
450 {
451 Status = AcpiPsCreateOp (WalkState, AmlOpStart, &Op);
452 if (ACPI_FAILURE (Status))
453 {
454 /*
455 * ACPI_PARSE_MODULE_LEVEL means that we are loading a table by
456 * executing it as a control method. However, if we encounter
457 * an error while loading the table, we need to keep trying to
458 * load the table rather than aborting the table load. Set the
459 * status to AE_OK to proceed with the table load.
460 */
461 if ((WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL) &&
462 ((Status == AE_ALREADY_EXISTS) || (Status == AE_NOT_FOUND)))
463 {
464 Status = AE_OK;
465 }
466 if (Status == AE_CTRL_PARSE_CONTINUE)
467 {
468 continue;
469 }
470
471 if (Status == AE_CTRL_PARSE_PENDING)
472 {
473 Status = AE_OK;
474 }
475
476 if (Status == AE_CTRL_TERMINATE)
477 {
478 return_ACPI_STATUS (Status);
479 }
480
481 Status = AcpiPsCompleteOp (WalkState, &Op, Status);
482 if (ACPI_FAILURE (Status))
483 {
484 return_ACPI_STATUS (Status);
485 }
486 if (AcpiNsOpensScope (
487 AcpiPsGetOpcodeInfo (WalkState->Opcode)->ObjectType))
488 {
489 /*
490 * If the scope/device op fails to parse, skip the body of
491 * the scope op because the parse failure indicates that
492 * the device may not exist.
493 */
494 ACPI_INFO (("Skipping parse of AML opcode: %s (0x%4.4X)",
495 AcpiPsGetOpcodeName (WalkState->Opcode), WalkState->Opcode));
496
497 /*
498 * Determine the opcode length before skipping the opcode.
499 * An opcode can be 1 byte or 2 bytes in length.
500 */
501 OpcodeLength = 1;
502 if ((WalkState->Opcode & 0xFF00) == AML_EXTENDED_OPCODE)
503 {
504 OpcodeLength = 2;
505 }
506 WalkState->ParserState.Aml = WalkState->Aml + OpcodeLength;
507
508 WalkState->ParserState.Aml =
509 AcpiPsGetNextPackageEnd(&WalkState->ParserState);
510 WalkState->Aml = WalkState->ParserState.Aml;
511 }
512
513 continue;
514 }
515
516 AcpiExStartTraceOpcode (Op, WalkState);
517 }
518
519 /*
520 * Start ArgCount at zero because we don't know if there are
521 * any args yet
522 */
523 WalkState->ArgCount = 0;
524
525 switch (Op->Common.AmlOpcode)
526 {
527 case AML_BYTE_OP:
528 case AML_WORD_OP:
529 case AML_DWORD_OP:
530 case AML_QWORD_OP:
531
532 break;
533
534 default:
535
536 ASL_CV_CAPTURE_COMMENTS (WalkState);
537 break;
538 }
539
540 /* Are there any arguments that must be processed? */
541
542 if (WalkState->ArgTypes)
543 {
544 /* Get arguments */
545
546 Status = AcpiPsGetArguments (WalkState, AmlOpStart, Op);
547 if (ACPI_FAILURE (Status))
548 {
549 Status = AcpiPsCompleteOp (WalkState, &Op, Status);
550 if (ACPI_FAILURE (Status))
551 {
552 return_ACPI_STATUS (Status);
553 }
554 if ((WalkState->ControlState) &&
555 ((WalkState->ControlState->Control.Opcode == AML_IF_OP) ||
556 (WalkState->ControlState->Control.Opcode == AML_WHILE_OP)))
557 {
558 /*
559 * If the if/while op fails to parse, we will skip parsing
560 * the body of the op.
561 */
562 ParserState->Aml =
563 WalkState->ControlState->Control.AmlPredicateStart + 1;
564 ParserState->Aml =
565 AcpiPsGetNextPackageEnd (ParserState);
566 WalkState->Aml = ParserState->Aml;
567
568 ACPI_ERROR ((AE_INFO, "Skipping While/If block"));
569 if (*WalkState->Aml == AML_ELSE_OP)
570 {
571 ACPI_ERROR ((AE_INFO, "Skipping Else block"));
572 WalkState->ParserState.Aml = WalkState->Aml + 1;
573 WalkState->ParserState.Aml =
574 AcpiPsGetNextPackageEnd (ParserState);
575 WalkState->Aml = ParserState->Aml;
576 }
577 ACPI_FREE(AcpiUtPopGenericState (&WalkState->ControlState));
578 }
579 Op = NULL;
580 continue;
581 }
582 }
583
584 /* Check for arguments that need to be processed */
585
586 ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
587 "Parseloop: argument count: %8.8X\n", WalkState->ArgCount));
588
589 if (WalkState->ArgCount)
590 {
591 /*
592 * There are arguments (complex ones), push Op and
593 * prepare for argument
594 */
595 Status = AcpiPsPushScope (ParserState, Op,
596 WalkState->ArgTypes, WalkState->ArgCount);
597 if (ACPI_FAILURE (Status))
598 {
599 Status = AcpiPsCompleteOp (WalkState, &Op, Status);
600 if (ACPI_FAILURE (Status))
601 {
602 return_ACPI_STATUS (Status);
603 }
604
605 continue;
606 }
607
608 Op = NULL;
609 continue;
610 }
611
612 /*
613 * All arguments have been processed -- Op is complete,
614 * prepare for next
615 */
616 WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
617 if (WalkState->OpInfo->Flags & AML_NAMED)
618 {
619 if (Op->Common.AmlOpcode == AML_REGION_OP ||
620 Op->Common.AmlOpcode == AML_DATA_REGION_OP)
621 {
622 /*
623 * Skip parsing of control method or opregion body,
624 * because we don't have enough info in the first pass
625 * to parse them correctly.
626 *
627 * Completed parsing an OpRegion declaration, we now
628 * know the length.
629 */
630 Op->Named.Length = (UINT32) (ParserState->Aml - Op->Named.Data);
631 }
632 }
633
634 if (WalkState->OpInfo->Flags & AML_CREATE)
635 {
636 /*
637 * Backup to beginning of CreateXXXfield declaration (1 for
638 * Opcode)
639 *
640 * BodyLength is unknown until we parse the body
641 */
642 Op->Named.Length = (UINT32) (ParserState->Aml - Op->Named.Data);
643 }
644
645 if (Op->Common.AmlOpcode == AML_BANK_FIELD_OP)
646 {
647 /*
648 * Backup to beginning of BankField declaration
649 *
650 * BodyLength is unknown until we parse the body
651 */
652 Op->Named.Length = (UINT32) (ParserState->Aml - Op->Named.Data);
653 }
654
655 /* This op complete, notify the dispatcher */
656
657 if (WalkState->AscendingCallback != NULL)
658 {
659 WalkState->Op = Op;
660 WalkState->Opcode = Op->Common.AmlOpcode;
661
662 Status = WalkState->AscendingCallback (WalkState);
663 Status = AcpiPsNextParseState (WalkState, Op, Status);
664 if (Status == AE_CTRL_PENDING)
665 {
666 Status = AE_OK;
667 }
668 else if ((WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL) &&
669 (ACPI_AML_EXCEPTION(Status) || Status == AE_ALREADY_EXISTS ||
670 Status == AE_NOT_FOUND))
671 {
672 /*
673 * ACPI_PARSE_MODULE_LEVEL flag means that we are currently
674 * loading a table by executing it as a control method.
675 * However, if we encounter an error while loading the table,
676 * we need to keep trying to load the table rather than
677 * aborting the table load (setting the status to AE_OK
678 * continues the table load). If we get a failure at this
679 * point, it means that the dispatcher got an error while
680 * trying to execute the Op.
681 */
682 Status = AE_OK;
683 }
684 }
685
686 Status = AcpiPsCompleteOp (WalkState, &Op, Status);
687 if (ACPI_FAILURE (Status))
688 {
689 return_ACPI_STATUS (Status);
690 }
691
692 } /* while ParserState->Aml */
693
694 Status = AcpiPsCompleteFinalOp (WalkState, Op, Status);
695 return_ACPI_STATUS (Status);
696 }
697