1 /******************************************************************************
2 *
3 * Module Name: dswload2 - Dispatcher second pass namespace load callbacks
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2014, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44 #define __DSWLOAD2_C__
45
46 #include "acpi.h"
47 #include "accommon.h"
48 #include "acparser.h"
49 #include "amlcode.h"
50 #include "acdispat.h"
51 #include "acinterp.h"
52 #include "acnamesp.h"
53 #include "acevents.h"
54
55 #define _COMPONENT ACPI_DISPATCHER
56 ACPI_MODULE_NAME ("dswload2")
57
58
59 /*******************************************************************************
60 *
61 * FUNCTION: AcpiDsLoad2BeginOp
62 *
63 * PARAMETERS: WalkState - Current state of the parse tree walk
64 * OutOp - Wher to return op if a new one is created
65 *
66 * RETURN: Status
67 *
68 * DESCRIPTION: Descending callback used during the loading of ACPI tables.
69 *
70 ******************************************************************************/
71
72 ACPI_STATUS
73 AcpiDsLoad2BeginOp (
74 ACPI_WALK_STATE *WalkState,
75 ACPI_PARSE_OBJECT **OutOp)
76 {
77 ACPI_PARSE_OBJECT *Op;
78 ACPI_NAMESPACE_NODE *Node;
79 ACPI_STATUS Status;
80 ACPI_OBJECT_TYPE ObjectType;
81 char *BufferPtr;
82 UINT32 Flags;
83
84
85 ACPI_FUNCTION_TRACE (DsLoad2BeginOp);
86
87
88 Op = WalkState->Op;
89 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", Op, WalkState));
90
91 if (Op)
92 {
93 if ((WalkState->ControlState) &&
94 (WalkState->ControlState->Common.State ==
95 ACPI_CONTROL_CONDITIONAL_EXECUTING))
96 {
97 /* We are executing a while loop outside of a method */
98
99 Status = AcpiDsExecBeginOp (WalkState, OutOp);
100 return_ACPI_STATUS (Status);
101 }
102
103 /* We only care about Namespace opcodes here */
104
105 if ((!(WalkState->OpInfo->Flags & AML_NSOPCODE) &&
106 (WalkState->Opcode != AML_INT_NAMEPATH_OP)) ||
107 (!(WalkState->OpInfo->Flags & AML_NAMED)))
108 {
109 return_ACPI_STATUS (AE_OK);
110 }
111
112 /* Get the name we are going to enter or lookup in the namespace */
113
114 if (WalkState->Opcode == AML_INT_NAMEPATH_OP)
115 {
116 /* For Namepath op, get the path string */
117
118 BufferPtr = Op->Common.Value.String;
119 if (!BufferPtr)
120 {
121 /* No name, just exit */
122
123 return_ACPI_STATUS (AE_OK);
124 }
125 }
126 else
127 {
128 /* Get name from the op */
129
130 BufferPtr = ACPI_CAST_PTR (char, &Op->Named.Name);
131 }
132 }
133 else
134 {
135 /* Get the namestring from the raw AML */
136
137 BufferPtr = AcpiPsGetNextNamestring (&WalkState->ParserState);
138 }
139
140 /* Map the opcode into an internal object type */
141
142 ObjectType = WalkState->OpInfo->ObjectType;
143
144 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
145 "State=%p Op=%p Type=%X\n", WalkState, Op, ObjectType));
146
147 switch (WalkState->Opcode)
148 {
149 case AML_FIELD_OP:
150 case AML_BANK_FIELD_OP:
151 case AML_INDEX_FIELD_OP:
152
153 Node = NULL;
154 Status = AE_OK;
155 break;
156
157 case AML_INT_NAMEPATH_OP:
158 /*
159 * The NamePath is an object reference to an existing object.
160 * Don't enter the name into the namespace, but look it up
161 * for use later.
162 */
163 Status = AcpiNsLookup (WalkState->ScopeInfo, BufferPtr, ObjectType,
164 ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
165 WalkState, &(Node));
166 break;
167
168 case AML_SCOPE_OP:
169
170 /* Special case for Scope(\) -> refers to the Root node */
171
172 if (Op && (Op->Named.Node == AcpiGbl_RootNode))
173 {
174 Node = Op->Named.Node;
175
176 Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);
177 if (ACPI_FAILURE (Status))
178 {
179 return_ACPI_STATUS (Status);
180 }
181 }
182 else
183 {
184 /*
185 * The Path is an object reference to an existing object.
186 * Don't enter the name into the namespace, but look it up
187 * for use later.
188 */
189 Status = AcpiNsLookup (WalkState->ScopeInfo, BufferPtr, ObjectType,
190 ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
191 WalkState, &(Node));
192 if (ACPI_FAILURE (Status))
193 {
194 #ifdef ACPI_ASL_COMPILER
195 if (Status == AE_NOT_FOUND)
196 {
197 Status = AE_OK;
198 }
199 else
200 {
201 ACPI_ERROR_NAMESPACE (BufferPtr, Status);
202 }
203 #else
204 ACPI_ERROR_NAMESPACE (BufferPtr, Status);
205 #endif
206 return_ACPI_STATUS (Status);
207 }
208 }
209
210 /*
211 * We must check to make sure that the target is
212 * one of the opcodes that actually opens a scope
213 */
214 switch (Node->Type)
215 {
216 case ACPI_TYPE_ANY:
217 case ACPI_TYPE_LOCAL_SCOPE: /* Scope */
218 case ACPI_TYPE_DEVICE:
219 case ACPI_TYPE_POWER:
220 case ACPI_TYPE_PROCESSOR:
221 case ACPI_TYPE_THERMAL:
222
223 /* These are acceptable types */
224 break;
225
226 case ACPI_TYPE_INTEGER:
227 case ACPI_TYPE_STRING:
228 case ACPI_TYPE_BUFFER:
229
230 /*
231 * These types we will allow, but we will change the type.
232 * This enables some existing code of the form:
233 *
234 * Name (DEB, 0)
235 * Scope (DEB) { ... }
236 */
237 ACPI_WARNING ((AE_INFO,
238 "Type override - [%4.4s] had invalid type (%s) "
239 "for Scope operator, changed to type ANY",
240 AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Node->Type)));
241
242 Node->Type = ACPI_TYPE_ANY;
243 WalkState->ScopeInfo->Common.Value = ACPI_TYPE_ANY;
244 break;
245
246 case ACPI_TYPE_METHOD:
247
248 /*
249 * Allow scope change to root during execution of module-level
250 * code. Root is typed METHOD during this time.
251 */
252 if ((Node == AcpiGbl_RootNode) &&
253 (WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL))
254 {
255 break;
256 }
257
258 /*lint -fallthrough */
259
260 default:
261
262 /* All other types are an error */
263
264 ACPI_ERROR ((AE_INFO,
265 "Invalid type (%s) for target of "
266 "Scope operator [%4.4s] (Cannot override)",
267 AcpiUtGetTypeName (Node->Type), AcpiUtGetNodeName (Node)));
268
269 return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
270 }
271 break;
272
273 default:
274
275 /* All other opcodes */
276
277 if (Op && Op->Common.Node)
278 {
279 /* This op/node was previously entered into the namespace */
280
281 Node = Op->Common.Node;
282
283 if (AcpiNsOpensScope (ObjectType))
284 {
285 Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);
286 if (ACPI_FAILURE (Status))
287 {
288 return_ACPI_STATUS (Status);
289 }
290 }
291
292 return_ACPI_STATUS (AE_OK);
293 }
294
295 /*
296 * Enter the named type into the internal namespace. We enter the name
297 * as we go downward in the parse tree. Any necessary subobjects that
298 * involve arguments to the opcode must be created as we go back up the
299 * parse tree later.
300 *
301 * Note: Name may already exist if we are executing a deferred opcode.
302 */
303 if (WalkState->DeferredNode)
304 {
305 /* This name is already in the namespace, get the node */
306
307 Node = WalkState->DeferredNode;
308 Status = AE_OK;
309 break;
310 }
311
312 Flags = ACPI_NS_NO_UPSEARCH;
313 if (WalkState->PassNumber == ACPI_IMODE_EXECUTE)
314 {
315 /* Execution mode, node cannot already exist, node is temporary */
316
317 Flags |= ACPI_NS_ERROR_IF_FOUND;
318
319 if (!(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL))
320 {
321 Flags |= ACPI_NS_TEMPORARY;
322 }
323 }
324
325 /* Add new entry or lookup existing entry */
326
327 Status = AcpiNsLookup (WalkState->ScopeInfo, BufferPtr, ObjectType,
328 ACPI_IMODE_LOAD_PASS2, Flags, WalkState, &Node);
329
330 if (ACPI_SUCCESS (Status) && (Flags & ACPI_NS_TEMPORARY))
331 {
332 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
333 "***New Node [%4.4s] %p is temporary\n",
334 AcpiUtGetNodeName (Node), Node));
335 }
336 break;
337 }
338
339 if (ACPI_FAILURE (Status))
340 {
341 ACPI_ERROR_NAMESPACE (BufferPtr, Status);
342 return_ACPI_STATUS (Status);
343 }
344
345 if (!Op)
346 {
347 /* Create a new op */
348
349 Op = AcpiPsAllocOp (WalkState->Opcode);
350 if (!Op)
351 {
352 return_ACPI_STATUS (AE_NO_MEMORY);
353 }
354
355 /* Initialize the new op */
356
357 if (Node)
358 {
359 Op->Named.Name = Node->Name.Integer;
360 }
361 *OutOp = Op;
362 }
363
364 /*
365 * Put the Node in the "op" object that the parser uses, so we
366 * can get it again quickly when this scope is closed
367 */
368 Op->Common.Node = Node;
369 return_ACPI_STATUS (Status);
370 }
371
372
373 /*******************************************************************************
374 *
375 * FUNCTION: AcpiDsLoad2EndOp
376 *
377 * PARAMETERS: WalkState - Current state of the parse tree walk
378 *
379 * RETURN: Status
380 *
381 * DESCRIPTION: Ascending callback used during the loading of the namespace,
382 * both control methods and everything else.
383 *
384 ******************************************************************************/
385
386 ACPI_STATUS
387 AcpiDsLoad2EndOp (
388 ACPI_WALK_STATE *WalkState)
389 {
390 ACPI_PARSE_OBJECT *Op;
391 ACPI_STATUS Status = AE_OK;
392 ACPI_OBJECT_TYPE ObjectType;
393 ACPI_NAMESPACE_NODE *Node;
394 ACPI_PARSE_OBJECT *Arg;
395 ACPI_NAMESPACE_NODE *NewNode;
396 #ifndef ACPI_NO_METHOD_EXECUTION
397 UINT32 i;
398 UINT8 RegionSpace;
399 #endif
400
401
402 ACPI_FUNCTION_TRACE (DsLoad2EndOp);
403
404 Op = WalkState->Op;
405 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
406 WalkState->OpInfo->Name, Op, WalkState));
407
408 /* Check if opcode had an associated namespace object */
409
410 if (!(WalkState->OpInfo->Flags & AML_NSOBJECT))
411 {
412 return_ACPI_STATUS (AE_OK);
413 }
414
415 if (Op->Common.AmlOpcode == AML_SCOPE_OP)
416 {
417 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
418 "Ending scope Op=%p State=%p\n", Op, WalkState));
419 }
420
421 ObjectType = WalkState->OpInfo->ObjectType;
422
423 /*
424 * Get the Node/name from the earlier lookup
425 * (It was saved in the *op structure)
426 */
427 Node = Op->Common.Node;
428
429 /*
430 * Put the Node on the object stack (Contains the ACPI Name of
431 * this object)
432 */
433 WalkState->Operands[0] = (void *) Node;
434 WalkState->NumOperands = 1;
435
436 /* Pop the scope stack */
437
438 if (AcpiNsOpensScope (ObjectType) &&
439 (Op->Common.AmlOpcode != AML_INT_METHODCALL_OP))
440 {
441 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%s) Popping scope for Op %p\n",
442 AcpiUtGetTypeName (ObjectType), Op));
443
444 Status = AcpiDsScopeStackPop (WalkState);
445 if (ACPI_FAILURE (Status))
446 {
447 goto Cleanup;
448 }
449 }
450
451 /*
452 * Named operations are as follows:
453 *
454 * AML_ALIAS
455 * AML_BANKFIELD
456 * AML_CREATEBITFIELD
457 * AML_CREATEBYTEFIELD
458 * AML_CREATEDWORDFIELD
459 * AML_CREATEFIELD
460 * AML_CREATEQWORDFIELD
461 * AML_CREATEWORDFIELD
462 * AML_DATA_REGION
463 * AML_DEVICE
464 * AML_EVENT
465 * AML_FIELD
466 * AML_INDEXFIELD
467 * AML_METHOD
468 * AML_METHODCALL
469 * AML_MUTEX
470 * AML_NAME
471 * AML_NAMEDFIELD
472 * AML_OPREGION
473 * AML_POWERRES
474 * AML_PROCESSOR
475 * AML_SCOPE
476 * AML_THERMALZONE
477 */
478
479 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
480 "Create-Load [%s] State=%p Op=%p NamedObj=%p\n",
481 AcpiPsGetOpcodeName (Op->Common.AmlOpcode), WalkState, Op, Node));
482
483 /* Decode the opcode */
484
485 Arg = Op->Common.Value.Arg;
486
487 switch (WalkState->OpInfo->Type)
488 {
489 #ifndef ACPI_NO_METHOD_EXECUTION
490
491 case AML_TYPE_CREATE_FIELD:
492 /*
493 * Create the field object, but the field buffer and index must
494 * be evaluated later during the execution phase
495 */
496 Status = AcpiDsCreateBufferField (Op, WalkState);
497 break;
498
499 case AML_TYPE_NAMED_FIELD:
500 /*
501 * If we are executing a method, initialize the field
502 */
503 if (WalkState->MethodNode)
504 {
505 Status = AcpiDsInitFieldObjects (Op, WalkState);
506 }
507
508 switch (Op->Common.AmlOpcode)
509 {
510 case AML_INDEX_FIELD_OP:
511
512 Status = AcpiDsCreateIndexField (Op, (ACPI_HANDLE) Arg->Common.Node,
513 WalkState);
514 break;
515
516 case AML_BANK_FIELD_OP:
517
518 Status = AcpiDsCreateBankField (Op, Arg->Common.Node, WalkState);
519 break;
520
521 case AML_FIELD_OP:
522
523 Status = AcpiDsCreateField (Op, Arg->Common.Node, WalkState);
524 break;
525
526 default:
527
528 /* All NAMED_FIELD opcodes must be handled above */
529 break;
530 }
531 break;
532
533 case AML_TYPE_NAMED_SIMPLE:
534
535 Status = AcpiDsCreateOperands (WalkState, Arg);
536 if (ACPI_FAILURE (Status))
537 {
538 goto Cleanup;
539 }
540
541 switch (Op->Common.AmlOpcode)
542 {
543 case AML_PROCESSOR_OP:
544
545 Status = AcpiExCreateProcessor (WalkState);
546 break;
547
548 case AML_POWER_RES_OP:
549
550 Status = AcpiExCreatePowerResource (WalkState);
551 break;
552
553 case AML_MUTEX_OP:
554
555 Status = AcpiExCreateMutex (WalkState);
556 break;
557
558 case AML_EVENT_OP:
559
560 Status = AcpiExCreateEvent (WalkState);
561 break;
562
563 case AML_ALIAS_OP:
564
565 Status = AcpiExCreateAlias (WalkState);
566 break;
567
568 default:
569
570 /* Unknown opcode */
571
572 Status = AE_OK;
573 goto Cleanup;
574 }
575
576 /* Delete operands */
577
578 for (i = 1; i < WalkState->NumOperands; i++)
579 {
580 AcpiUtRemoveReference (WalkState->Operands[i]);
581 WalkState->Operands[i] = NULL;
582 }
583
584 break;
585 #endif /* ACPI_NO_METHOD_EXECUTION */
586
587 case AML_TYPE_NAMED_COMPLEX:
588
589 switch (Op->Common.AmlOpcode)
590 {
591 #ifndef ACPI_NO_METHOD_EXECUTION
592 case AML_REGION_OP:
593 case AML_DATA_REGION_OP:
594
595 if (Op->Common.AmlOpcode == AML_REGION_OP)
596 {
597 RegionSpace = (ACPI_ADR_SPACE_TYPE)
598 ((Op->Common.Value.Arg)->Common.Value.Integer);
599 }
600 else
601 {
602 RegionSpace = ACPI_ADR_SPACE_DATA_TABLE;
603 }
604
605 /*
606 * The OpRegion is not fully parsed at this time. The only valid
607 * argument is the SpaceId. (We must save the address of the
608 * AML of the address and length operands)
609 *
610 * If we have a valid region, initialize it. The namespace is
611 * unlocked at this point.
612 *
613 * Need to unlock interpreter if it is locked (if we are running
614 * a control method), in order to allow _REG methods to be run
615 * during AcpiEvInitializeRegion.
616 */
617 if (WalkState->MethodNode)
618 {
619 /*
620 * Executing a method: initialize the region and unlock
621 * the interpreter
622 */
623 Status = AcpiExCreateRegion (Op->Named.Data, Op->Named.Length,
624 RegionSpace, WalkState);
625 if (ACPI_FAILURE (Status))
626 {
627 return_ACPI_STATUS (Status);
628 }
629
630 AcpiExExitInterpreter ();
631 }
632
633 Status = AcpiEvInitializeRegion (AcpiNsGetAttachedObject (Node),
634 FALSE);
635 if (WalkState->MethodNode)
636 {
637 AcpiExEnterInterpreter ();
638 }
639
640 if (ACPI_FAILURE (Status))
641 {
642 /*
643 * If AE_NOT_EXIST is returned, it is not fatal
644 * because many regions get created before a handler
645 * is installed for said region.
646 */
647 if (AE_NOT_EXIST == Status)
648 {
649 Status = AE_OK;
650 }
651 }
652 break;
653
654 case AML_NAME_OP:
655
656 Status = AcpiDsCreateNode (WalkState, Node, Op);
657 break;
658
659 case AML_METHOD_OP:
660 /*
661 * MethodOp PkgLength NameString MethodFlags TermList
662 *
663 * Note: We must create the method node/object pair as soon as we
664 * see the method declaration. This allows later pass1 parsing
665 * of invocations of the method (need to know the number of
666 * arguments.)
667 */
668 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
669 "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
670 WalkState, Op, Op->Named.Node));
671
672 if (!AcpiNsGetAttachedObject (Op->Named.Node))
673 {
674 WalkState->Operands[0] = ACPI_CAST_PTR (void, Op->Named.Node);
675 WalkState->NumOperands = 1;
676
677 Status = AcpiDsCreateOperands (WalkState, Op->Common.Value.Arg);
678 if (ACPI_SUCCESS (Status))
679 {
680 Status = AcpiExCreateMethod (Op->Named.Data,
681 Op->Named.Length, WalkState);
682 }
683 WalkState->Operands[0] = NULL;
684 WalkState->NumOperands = 0;
685
686 if (ACPI_FAILURE (Status))
687 {
688 return_ACPI_STATUS (Status);
689 }
690 }
691 break;
692
693 #endif /* ACPI_NO_METHOD_EXECUTION */
694
695 default:
696
697 /* All NAMED_COMPLEX opcodes must be handled above */
698 break;
699 }
700 break;
701
702 case AML_CLASS_INTERNAL:
703
704 /* case AML_INT_NAMEPATH_OP: */
705 break;
706
707 case AML_CLASS_METHOD_CALL:
708
709 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
710 "RESOLVING-MethodCall: State=%p Op=%p NamedObj=%p\n",
711 WalkState, Op, Node));
712
713 /*
714 * Lookup the method name and save the Node
715 */
716 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,
717 ACPI_TYPE_ANY, ACPI_IMODE_LOAD_PASS2,
718 ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
719 WalkState, &(NewNode));
720 if (ACPI_SUCCESS (Status))
721 {
722 /*
723 * Make sure that what we found is indeed a method
724 * We didn't search for a method on purpose, to see if the name
725 * would resolve
726 */
727 if (NewNode->Type != ACPI_TYPE_METHOD)
728 {
729 Status = AE_AML_OPERAND_TYPE;
730 }
731
732 /* We could put the returned object (Node) on the object stack for
733 * later, but for now, we will put it in the "op" object that the
734 * parser uses, so we can get it again at the end of this scope
735 */
736 Op->Common.Node = NewNode;
737 }
738 else
739 {
740 ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status);
741 }
742 break;
743
744
745 default:
746
747 break;
748 }
749
750 Cleanup:
751
752 /* Remove the Node pushed at the very beginning */
753
754 WalkState->Operands[0] = NULL;
755 WalkState->NumOperands = 0;
756 return_ACPI_STATUS (Status);
757 }