1 /******************************************************************************
2 *
3 * Module Name: aslanalyze.c - Support functions for parse tree walks
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 #include "aslcompiler.h"
153 #include "aslcompiler.y.h"
154 #include "acnamesp.h"
155 #include <string.h>
156
157
158 #define _COMPONENT ACPI_COMPILER
159 ACPI_MODULE_NAME ("aslanalyze")
160
161
162 /* Local Prototypes */
163
164 static ACPI_STATUS
165 ApDeviceSubtreeWalk (
166 ACPI_PARSE_OBJECT *Op,
167 UINT32 Level,
168 void *Context);
169
170
171 /*******************************************************************************
172 *
173 * FUNCTION: AnIsInternalMethod
174 *
175 * PARAMETERS: Op - Current op
176 *
177 * RETURN: Boolean
178 *
179 * DESCRIPTION: Check for an internal control method.
180 *
181 ******************************************************************************/
182
183 BOOLEAN
AnIsInternalMethod(ACPI_PARSE_OBJECT * Op)184 AnIsInternalMethod (
185 ACPI_PARSE_OBJECT *Op)
186 {
187
188 if ((!strcmp (Op->Asl.ExternalName, "\\_OSI")) ||
189 (!strcmp (Op->Asl.ExternalName, "_OSI")))
190 {
191 return (TRUE);
192 }
193
194 return (FALSE);
195 }
196
197
198 /*******************************************************************************
199 *
200 * FUNCTION: AnGetInternalMethodReturnType
201 *
202 * PARAMETERS: Op - Current op
203 *
204 * RETURN: Btype
205 *
206 * DESCRIPTION: Get the return type of an internal method
207 *
208 ******************************************************************************/
209
210 UINT32
AnGetInternalMethodReturnType(ACPI_PARSE_OBJECT * Op)211 AnGetInternalMethodReturnType (
212 ACPI_PARSE_OBJECT *Op)
213 {
214
215 if ((!strcmp (Op->Asl.ExternalName, "\\_OSI")) ||
216 (!strcmp (Op->Asl.ExternalName, "_OSI")))
217 {
218 return (ACPI_BTYPE_STRING);
219 }
220
221 return (0);
222 }
223
224
225 /*******************************************************************************
226 *
227 * FUNCTION: AnCheckId
228 *
229 * PARAMETERS: Op - Current parse op
230 * Type - HID or CID
231 *
232 * RETURN: None
233 *
234 * DESCRIPTION: Perform various checks on _HID and _CID strings. Only limited
235 * checks can be performed on _CID strings.
236 *
237 ******************************************************************************/
238
239 void
AnCheckId(ACPI_PARSE_OBJECT * Op,ACPI_NAME Type)240 AnCheckId (
241 ACPI_PARSE_OBJECT *Op,
242 ACPI_NAME Type)
243 {
244 UINT32 i;
245 ACPI_SIZE Length;
246
247
248 /* Only care about string versions of _HID/_CID (integers are legal) */
249
250 if (Op->Asl.ParseOpcode != PARSEOP_STRING_LITERAL)
251 {
252 return;
253 }
254
255 /* For both _HID and _CID, the string must be non-null */
256
257 Length = strlen (Op->Asl.Value.String);
258 if (!Length)
259 {
260 AslError (ASL_ERROR, ASL_MSG_NULL_STRING, Op, NULL);
261 return;
262 }
263
264 /*
265 * One of the things we want to catch here is the use of a leading
266 * asterisk in the string -- an odd construct that certain platform
267 * manufacturers are fond of. Technically, a leading asterisk is OK
268 * for _CID, but a valid use of this has not been seen.
269 */
270 if (*Op->Asl.Value.String == '*')
271 {
272 AslError (ASL_ERROR, ASL_MSG_LEADING_ASTERISK,
273 Op, Op->Asl.Value.String);
274 return;
275 }
276
277 /* _CID strings are bus-specific, no more checks can be performed */
278
279 if (Type == ASL_TYPE_CID)
280 {
281 return;
282 }
283
284 /* For _HID, all characters must be alphanumeric */
285
286 for (i = 0; Op->Asl.Value.String[i]; i++)
287 {
288 if (!isalnum ((int) Op->Asl.Value.String[i]))
289 {
290 AslError (ASL_ERROR, ASL_MSG_ALPHANUMERIC_STRING,
291 Op, Op->Asl.Value.String);
292 return;
293 }
294 }
295
296 /*
297 * _HID String must be one of these forms:
298 *
299 * "AAA####" A is an uppercase letter and # is a hex digit
300 * "ACPI####" # is a hex digit
301 * "NNNN####" N is an uppercase letter or decimal digit (0-9)
302 * # is a hex digit (ACPI 5.0)
303 */
304 if ((Length < 7) || (Length > 8))
305 {
306 AslError (ASL_ERROR, ASL_MSG_HID_LENGTH,
307 Op, Op->Asl.Value.String);
308 return;
309 }
310
311 /* _HID Length is valid (7 or 8), now check prefix (first 3 or 4 chars) */
312
313 if (Length == 7)
314 {
315 /* AAA####: Ensure the alphabetic prefix is all uppercase */
316
317 for (i = 0; i < 3; i++)
318 {
319 if (!isupper ((int) Op->Asl.Value.String[i]))
320 {
321 AslError (ASL_ERROR, ASL_MSG_UPPER_CASE,
322 Op, &Op->Asl.Value.String[i]);
323 return;
324 }
325 }
326 }
327 else /* Length == 8 */
328 {
329 /*
330 * ACPI#### or NNNN####:
331 * Ensure the prefix contains only uppercase alpha or decimal digits
332 */
333 for (i = 0; i < 4; i++)
334 {
335 if (!isupper ((int) Op->Asl.Value.String[i]) &&
336 !isdigit ((int) Op->Asl.Value.String[i]))
337 {
338 AslError (ASL_ERROR, ASL_MSG_HID_PREFIX,
339 Op, &Op->Asl.Value.String[i]);
340 return;
341 }
342 }
343 }
344
345 /* Remaining characters (suffix) must be hex digits */
346
347 for (; i < Length; i++)
348 {
349 if (!isxdigit ((int) Op->Asl.Value.String[i]))
350 {
351 AslError (ASL_ERROR, ASL_MSG_HID_SUFFIX,
352 Op, &Op->Asl.Value.String[i]);
353 break;
354 }
355 }
356 }
357
358
359 /*******************************************************************************
360 *
361 * FUNCTION: AnLastStatementIsReturn
362 *
363 * PARAMETERS: Op - A method parse node
364 *
365 * RETURN: TRUE if last statement is an ASL RETURN. False otherwise
366 *
367 * DESCRIPTION: Walk down the list of top level statements within a method
368 * to find the last one. Check if that last statement is in
369 * fact a RETURN statement.
370 *
371 ******************************************************************************/
372
373 BOOLEAN
AnLastStatementIsReturn(ACPI_PARSE_OBJECT * Op)374 AnLastStatementIsReturn (
375 ACPI_PARSE_OBJECT *Op)
376 {
377 ACPI_PARSE_OBJECT *Next;
378
379
380 /* Check if last statement is a return */
381
382 Next = ASL_GET_CHILD_NODE (Op);
383 while (Next)
384 {
385 if ((!Next->Asl.Next) &&
386 (Next->Asl.ParseOpcode == PARSEOP_RETURN))
387 {
388 return (TRUE);
389 }
390
391 Next = ASL_GET_PEER_NODE (Next);
392 }
393
394 return (FALSE);
395 }
396
397
398 /*******************************************************************************
399 *
400 * FUNCTION: AnCheckMethodReturnValue
401 *
402 * PARAMETERS: Op - Parent
403 * OpInfo - Parent info
404 * ArgOp - Method invocation op
405 * RequiredBtypes - What caller requires
406 * ThisNodeBtype - What this node returns (if anything)
407 *
408 * RETURN: None
409 *
410 * DESCRIPTION: Check a method invocation for 1) A return value and if it does
411 * in fact return a value, 2) check the type of the return value.
412 *
413 ******************************************************************************/
414
415 void
AnCheckMethodReturnValue(ACPI_PARSE_OBJECT * Op,const ACPI_OPCODE_INFO * OpInfo,ACPI_PARSE_OBJECT * ArgOp,UINT32 RequiredBtypes,UINT32 ThisNodeBtype)416 AnCheckMethodReturnValue (
417 ACPI_PARSE_OBJECT *Op,
418 const ACPI_OPCODE_INFO *OpInfo,
419 ACPI_PARSE_OBJECT *ArgOp,
420 UINT32 RequiredBtypes,
421 UINT32 ThisNodeBtype)
422 {
423 ACPI_PARSE_OBJECT *OwningOp;
424 ACPI_NAMESPACE_NODE *Node;
425 char *ExternalPath;
426
427
428 Node = ArgOp->Asl.Node;
429
430 if (!Node)
431 {
432 /* No error message, this can happen and is OK */
433
434 return;
435 }
436
437 /* Examine the parent op of this method */
438
439 OwningOp = Node->Op;
440 ExternalPath = AcpiNsGetNormalizedPathname (Node, TRUE);
441
442 if (OwningOp->Asl.CompileFlags & OP_METHOD_NO_RETVAL)
443 {
444 /* Method NEVER returns a value */
445
446 AslError (ASL_ERROR, ASL_MSG_NO_RETVAL, Op, ExternalPath);
447 }
448 else if (OwningOp->Asl.CompileFlags & OP_METHOD_SOME_NO_RETVAL)
449 {
450 /* Method SOMETIMES returns a value, SOMETIMES not */
451
452 AslError (ASL_WARNING, ASL_MSG_SOME_NO_RETVAL, Op, ExternalPath);
453 }
454 else if (!(ThisNodeBtype & RequiredBtypes))
455 {
456 /* Method returns a value, but the type is wrong */
457
458 AnFormatBtype (AslGbl_StringBuffer, ThisNodeBtype);
459 AnFormatBtype (AslGbl_StringBuffer2, RequiredBtypes);
460
461 /*
462 * The case where the method does not return any value at all
463 * was already handled in the namespace cross reference
464 * -- Only issue an error if the method in fact returns a value,
465 * but it is of the wrong type
466 */
467 if (ThisNodeBtype != 0)
468 {
469 sprintf (AslGbl_MsgBuffer,
470 "Method returns [%s], %s operator requires [%s]",
471 AslGbl_StringBuffer, OpInfo->Name, AslGbl_StringBuffer2);
472
473 AslError (ASL_WARNING, ASL_MSG_INVALID_TYPE, ArgOp, AslGbl_MsgBuffer);
474 }
475 }
476
477 if (ExternalPath)
478 {
479 ACPI_FREE (ExternalPath);
480 }
481 }
482
483
484 /*******************************************************************************
485 *
486 * FUNCTION: AnIsResultUsed
487 *
488 * PARAMETERS: Op - Parent op for the operator
489 *
490 * RETURN: TRUE if result from this operation is actually consumed
491 *
492 * DESCRIPTION: Determine if the function result value from an operator is
493 * used.
494 *
495 ******************************************************************************/
496
497 BOOLEAN
AnIsResultUsed(ACPI_PARSE_OBJECT * Op)498 AnIsResultUsed (
499 ACPI_PARSE_OBJECT *Op)
500 {
501 ACPI_PARSE_OBJECT *Parent;
502
503
504 switch (Op->Asl.ParseOpcode)
505 {
506 case PARSEOP_INCREMENT:
507 case PARSEOP_DECREMENT:
508
509 /* These are standalone operators, no return value */
510
511 return (TRUE);
512
513 default:
514
515 break;
516 }
517
518 /* Examine parent to determine if the return value is used */
519
520 Parent = Op->Asl.Parent;
521 switch (Parent->Asl.ParseOpcode)
522 {
523 /* If/While - check if the operator is the predicate */
524
525 case PARSEOP_IF:
526 case PARSEOP_WHILE:
527
528 /* First child is the predicate */
529
530 if (Parent->Asl.Child == Op)
531 {
532 return (TRUE);
533 }
534
535 return (FALSE);
536
537 /* Not used if one of these is the parent */
538
539 case PARSEOP_METHOD:
540 case PARSEOP_DEFINITION_BLOCK:
541 case PARSEOP_ELSE:
542
543 return (FALSE);
544
545 default:
546
547 /* Any other type of parent means that the result is used */
548
549 return (TRUE);
550 }
551 }
552
553
554 /*******************************************************************************
555 *
556 * FUNCTION: ApCheckForGpeNameConflict
557 *
558 * PARAMETERS: Op - Current parse op
559 *
560 * RETURN: None
561 *
562 * DESCRIPTION: Check for a conflict between GPE names within this scope.
563 * Conflict means two GPE names with the same GPE number, but
564 * different types -- such as _L1C and _E1C.
565 *
566 ******************************************************************************/
567
568 void
ApCheckForGpeNameConflict(ACPI_PARSE_OBJECT * Op)569 ApCheckForGpeNameConflict (
570 ACPI_PARSE_OBJECT *Op)
571 {
572 ACPI_PARSE_OBJECT *NextOp;
573 UINT32 GpeNumber;
574 char Name[ACPI_NAMESEG_SIZE + 1];
575 char Target[ACPI_NAMESEG_SIZE];
576
577
578 /* Need a null-terminated string version of NameSeg */
579
580 ACPI_MOVE_32_TO_32 (Name, Op->Asl.NameSeg);
581 Name[ACPI_NAMESEG_SIZE] = 0;
582
583 /*
584 * For a GPE method:
585 * 1st char must be underscore
586 * 2nd char must be L or E
587 * 3rd/4th chars must be a hex number
588 */
589 if ((Name[0] != '_') ||
590 ((Name[1] != 'L') && (Name[1] != 'E')))
591 {
592 return;
593 }
594
595 /* Verify 3rd/4th chars are a valid hex value */
596
597 GpeNumber = strtoul (&Name[2], NULL, 16);
598 if (GpeNumber == ACPI_UINT32_MAX)
599 {
600 return;
601 }
602
603 /*
604 * We are now sure we have an _Lxx or _Exx.
605 * Create the target name that would cause collision (Flip E/L)
606 */
607 ACPI_MOVE_32_TO_32 (Target, Name);
608
609 /* Inject opposite letter ("L" versus "E") */
610
611 if (Name[1] == 'L')
612 {
613 Target[1] = 'E';
614 }
615 else /* Name[1] == 'E' */
616 {
617 Target[1] = 'L';
618 }
619
620 /* Search all peers (objects within this scope) for target match */
621
622 NextOp = Op->Asl.Next;
623 while (NextOp)
624 {
625 /*
626 * We mostly care about methods, but check Name() constructs also,
627 * even though they will get another error for not being a method.
628 * All GPE names must be defined as control methods.
629 */
630 if ((NextOp->Asl.ParseOpcode == PARSEOP_METHOD) ||
631 (NextOp->Asl.ParseOpcode == PARSEOP_NAME))
632 {
633 if (ACPI_COMPARE_NAMESEG (Target, NextOp->Asl.NameSeg))
634 {
635 /* Found both _Exy and _Lxy in the same scope, error */
636
637 AslError (ASL_ERROR, ASL_MSG_GPE_NAME_CONFLICT, NextOp,
638 Name);
639 return;
640 }
641 }
642
643 NextOp = NextOp->Asl.Next;
644 }
645
646 /* OK, no conflict found */
647
648 return;
649 }
650
651
652 /*******************************************************************************
653 *
654 * FUNCTION: ApCheckRegMethod
655 *
656 * PARAMETERS: Op - Current parse op
657 *
658 * RETURN: None
659 *
660 * DESCRIPTION: Ensure that a _REG method has a corresponding Operation
661 * Region declaration within the same scope. Note: _REG is defined
662 * to have two arguments and must therefore be defined as a
663 * control method.
664 *
665 ******************************************************************************/
666
667 void
ApCheckRegMethod(ACPI_PARSE_OBJECT * Op)668 ApCheckRegMethod (
669 ACPI_PARSE_OBJECT *Op)
670 {
671 ACPI_PARSE_OBJECT *Next;
672 ACPI_PARSE_OBJECT *Parent;
673
674
675 /* We are only interested in _REG methods */
676
677 if (!ACPI_COMPARE_NAMESEG (METHOD_NAME__REG, &Op->Asl.NameSeg))
678 {
679 return;
680 }
681
682 /* Get the start of the current scope */
683
684 Parent = Op->Asl.Parent;
685 Next = Parent->Asl.Child;
686
687 /* Search entire scope for an operation region declaration */
688
689 while (Next)
690 {
691 if (Next->Asl.ParseOpcode == PARSEOP_OPERATIONREGION)
692 {
693 return; /* Found region, OK */
694 }
695
696 Next = Next->Asl.Next;
697 }
698
699 /* No region found, issue warning */
700
701 AslError (ASL_WARNING, ASL_MSG_NO_REGION, Op, NULL);
702 }
703
704
705 /*******************************************************************************
706 *
707 * FUNCTION: ApFindNameInDeviceTree
708 *
709 * PARAMETERS: Name - Name to search for
710 * Op - Current parse op
711 *
712 * RETURN: TRUE if name found in the same scope as Op.
713 *
714 * DESCRIPTION: Determine if a name appears in the same scope as Op, as either
715 * a Method() or a Name(). "Same scope" can mean under an If or
716 * Else statement.
717 *
718 * NOTE: Detects _HID/_ADR in this type of construct (legal in ACPI 6.1+)
719 *
720 * Scope (\_SB.PCI0)
721 * {
722 * Device (I2C0)
723 * {
724 * If (SMD0 != 4) {
725 * Name (_HID, "INT3442")
726 * } Else {
727 * Name (_ADR, 0x400)
728 * }
729 * }
730 * }
731 ******************************************************************************/
732
733 BOOLEAN
ApFindNameInDeviceTree(char * Name,ACPI_PARSE_OBJECT * Op)734 ApFindNameInDeviceTree (
735 char *Name,
736 ACPI_PARSE_OBJECT *Op)
737 {
738 ACPI_STATUS Status;
739
740
741 Status = TrWalkParseTree (Op, ASL_WALK_VISIT_DOWNWARD,
742 ApDeviceSubtreeWalk, NULL, Name);
743
744 if (Status == AE_CTRL_TRUE)
745 {
746 return (TRUE); /* Found a match */
747 }
748
749 return (FALSE);
750 }
751
752
753 /* Callback function for interface above */
754
755 static ACPI_STATUS
ApDeviceSubtreeWalk(ACPI_PARSE_OBJECT * Op,UINT32 Level,void * Context)756 ApDeviceSubtreeWalk (
757 ACPI_PARSE_OBJECT *Op,
758 UINT32 Level,
759 void *Context)
760 {
761 char *Name = ACPI_CAST_PTR (char, Context);
762
763
764 switch (Op->Asl.ParseOpcode)
765 {
766 case PARSEOP_DEVICE:
767
768 /* Level 0 is the starting device, ignore it */
769
770 if (Level > 0)
771 {
772 /* Ignore sub-devices */
773
774 return (AE_CTRL_DEPTH);
775 }
776 break;
777
778 case PARSEOP_NAME:
779 case PARSEOP_METHOD:
780
781 /* These are what we are looking for */
782
783 if (ACPI_COMPARE_NAMESEG (Name, Op->Asl.NameSeg))
784 {
785 return (AE_CTRL_TRUE);
786 }
787 return (AE_CTRL_DEPTH);
788
789 case PARSEOP_SCOPE:
790 case PARSEOP_FIELD:
791 case PARSEOP_OPERATIONREGION:
792
793 /*
794 * We want to ignore these, because either they can be large
795 * subtrees or open a scope to somewhere else.
796 */
797 return (AE_CTRL_DEPTH);
798
799 default:
800 break;
801 }
802
803 return (AE_OK);
804 }
805
806
807 /*******************************************************************************
808 *
809 * FUNCTION: ApFindNameInScope
810 *
811 * PARAMETERS: Name - Name to search for
812 * Op - Current parse op
813 *
814 * RETURN: TRUE if name found in the same scope as Op.
815 *
816 * DESCRIPTION: Determine if a name appears in the same scope as Op, as either
817 * a Method() or a Name().
818 *
819 ******************************************************************************/
820
821 BOOLEAN
ApFindNameInScope(char * Name,ACPI_PARSE_OBJECT * Op)822 ApFindNameInScope (
823 char *Name,
824 ACPI_PARSE_OBJECT *Op)
825 {
826 ACPI_PARSE_OBJECT *Next;
827 ACPI_PARSE_OBJECT *Parent;
828
829
830 /* Get the start of the current scope */
831
832 Parent = Op->Asl.Parent;
833 Next = Parent->Asl.Child;
834
835 /* Search entire scope for a match to the name */
836
837 while (Next)
838 {
839 if ((Next->Asl.ParseOpcode == PARSEOP_METHOD) ||
840 (Next->Asl.ParseOpcode == PARSEOP_NAME))
841 {
842 if (ACPI_COMPARE_NAMESEG (Name, Next->Asl.NameSeg))
843 {
844 return (TRUE);
845 }
846 }
847
848 Next = Next->Asl.Next;
849 }
850
851 return (FALSE);
852 }
853
