1 /******************************************************************************
2 *
3 * Module Name: dsopcode - Dispatcher support for regions and fields
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2022, 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 MERCHANTABILITY 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 #include "acpi.h"
45 #include "accommon.h"
46 #include "acparser.h"
47 #include "amlcode.h"
48 #include "acdispat.h"
49 #include "acinterp.h"
50 #include "acnamesp.h"
51 #include "acevents.h"
52 #include "actables.h"
53
54 #define _COMPONENT ACPI_DISPATCHER
55 ACPI_MODULE_NAME ("dsopcode")
56
57 /* Local prototypes */
58
59 static ACPI_STATUS
60 AcpiDsInitBufferField (
61 UINT16 AmlOpcode,
62 ACPI_OPERAND_OBJECT *ObjDesc,
63 ACPI_OPERAND_OBJECT *BufferDesc,
64 ACPI_OPERAND_OBJECT *OffsetDesc,
65 ACPI_OPERAND_OBJECT *LengthDesc,
66 ACPI_OPERAND_OBJECT *ResultDesc);
67
68
69 /*******************************************************************************
70 *
71 * FUNCTION: AcpiDsInitializeRegion
72 *
73 * PARAMETERS: ObjHandle - Region namespace node
74 *
75 * RETURN: Status
76 *
77 * DESCRIPTION: Front end to EvInitializeRegion
78 *
79 ******************************************************************************/
80
81 ACPI_STATUS
AcpiDsInitializeRegion(ACPI_HANDLE ObjHandle)82 AcpiDsInitializeRegion (
83 ACPI_HANDLE ObjHandle)
84 {
85 ACPI_OPERAND_OBJECT *ObjDesc;
86 ACPI_STATUS Status;
87
88
89 ObjDesc = AcpiNsGetAttachedObject (ObjHandle);
90
91 /* Namespace is NOT locked */
92
93 Status = AcpiEvInitializeRegion (ObjDesc);
94 return (Status);
95 }
96
97
98 /*******************************************************************************
99 *
100 * FUNCTION: AcpiDsInitBufferField
101 *
102 * PARAMETERS: AmlOpcode - CreateXxxField
103 * ObjDesc - BufferField object
104 * BufferDesc - Host Buffer
105 * OffsetDesc - Offset into buffer
106 * LengthDesc - Length of field (CREATE_FIELD_OP only)
107 * ResultDesc - Where to store the result
108 *
109 * RETURN: Status
110 *
111 * DESCRIPTION: Perform actual initialization of a buffer field
112 *
113 ******************************************************************************/
114
115 static ACPI_STATUS
AcpiDsInitBufferField(UINT16 AmlOpcode,ACPI_OPERAND_OBJECT * ObjDesc,ACPI_OPERAND_OBJECT * BufferDesc,ACPI_OPERAND_OBJECT * OffsetDesc,ACPI_OPERAND_OBJECT * LengthDesc,ACPI_OPERAND_OBJECT * ResultDesc)116 AcpiDsInitBufferField (
117 UINT16 AmlOpcode,
118 ACPI_OPERAND_OBJECT *ObjDesc,
119 ACPI_OPERAND_OBJECT *BufferDesc,
120 ACPI_OPERAND_OBJECT *OffsetDesc,
121 ACPI_OPERAND_OBJECT *LengthDesc,
122 ACPI_OPERAND_OBJECT *ResultDesc)
123 {
124 UINT32 Offset;
125 UINT32 BitOffset;
126 UINT32 BitCount;
127 UINT8 FieldFlags;
128 ACPI_STATUS Status;
129
130
131 ACPI_FUNCTION_TRACE_PTR (DsInitBufferField, ObjDesc);
132
133
134 /* Host object must be a Buffer */
135
136 if (BufferDesc->Common.Type != ACPI_TYPE_BUFFER)
137 {
138 ACPI_ERROR ((AE_INFO,
139 "Target of Create Field is not a Buffer object - %s",
140 AcpiUtGetObjectTypeName (BufferDesc)));
141
142 Status = AE_AML_OPERAND_TYPE;
143 goto Cleanup;
144 }
145
146 /*
147 * The last parameter to all of these opcodes (ResultDesc) started
148 * out as a NameString, and should therefore now be a NS node
149 * after resolution in AcpiExResolveOperands().
150 */
151 if (ACPI_GET_DESCRIPTOR_TYPE (ResultDesc) != ACPI_DESC_TYPE_NAMED)
152 {
153 ACPI_ERROR ((AE_INFO,
154 "(%s) destination not a NS Node [%s]",
155 AcpiPsGetOpcodeName (AmlOpcode),
156 AcpiUtGetDescriptorName (ResultDesc)));
157
158 Status = AE_AML_OPERAND_TYPE;
159 goto Cleanup;
160 }
161
162 Offset = (UINT32) OffsetDesc->Integer.Value;
163
164 /*
165 * Setup the Bit offsets and counts, according to the opcode
166 */
167 switch (AmlOpcode)
168 {
169 case AML_CREATE_FIELD_OP:
170
171 /* Offset is in bits, count is in bits */
172
173 FieldFlags = AML_FIELD_ACCESS_BYTE;
174 BitOffset = Offset;
175 BitCount = (UINT32) LengthDesc->Integer.Value;
176
177 /* Must have a valid (>0) bit count */
178
179 if (BitCount == 0)
180 {
181 ACPI_BIOS_ERROR ((AE_INFO,
182 "Attempt to CreateField of length zero"));
183 Status = AE_AML_OPERAND_VALUE;
184 goto Cleanup;
185 }
186 break;
187
188 case AML_CREATE_BIT_FIELD_OP:
189
190 /* Offset is in bits, Field is one bit */
191
192 BitOffset = Offset;
193 BitCount = 1;
194 FieldFlags = AML_FIELD_ACCESS_BYTE;
195 break;
196
197 case AML_CREATE_BYTE_FIELD_OP:
198
199 /* Offset is in bytes, field is one byte */
200
201 BitOffset = 8 * Offset;
202 BitCount = 8;
203 FieldFlags = AML_FIELD_ACCESS_BYTE;
204 break;
205
206 case AML_CREATE_WORD_FIELD_OP:
207
208 /* Offset is in bytes, field is one word */
209
210 BitOffset = 8 * Offset;
211 BitCount = 16;
212 FieldFlags = AML_FIELD_ACCESS_WORD;
213 break;
214
215 case AML_CREATE_DWORD_FIELD_OP:
216
217 /* Offset is in bytes, field is one dword */
218
219 BitOffset = 8 * Offset;
220 BitCount = 32;
221 FieldFlags = AML_FIELD_ACCESS_DWORD;
222 break;
223
224 case AML_CREATE_QWORD_FIELD_OP:
225
226 /* Offset is in bytes, field is one qword */
227
228 BitOffset = 8 * Offset;
229 BitCount = 64;
230 FieldFlags = AML_FIELD_ACCESS_QWORD;
231 break;
232
233 default:
234
235 ACPI_ERROR ((AE_INFO,
236 "Unknown field creation opcode 0x%02X",
237 AmlOpcode));
238 Status = AE_AML_BAD_OPCODE;
239 goto Cleanup;
240 }
241
242 /* Entire field must fit within the current length of the buffer */
243
244 if ((BitOffset + BitCount) >
245 (8 * (UINT32) BufferDesc->Buffer.Length))
246 {
247 Status = AE_AML_BUFFER_LIMIT;
248 ACPI_BIOS_EXCEPTION ((AE_INFO, Status,
249 "Field [%4.4s] at bit offset/length %u/%u "
250 "exceeds size of target Buffer (%u bits)",
251 AcpiUtGetNodeName (ResultDesc), BitOffset, BitCount,
252 8 * (UINT32) BufferDesc->Buffer.Length));
253 goto Cleanup;
254 }
255
256 /*
257 * Initialize areas of the field object that are common to all fields
258 * For FieldFlags, use LOCK_RULE = 0 (NO_LOCK),
259 * UPDATE_RULE = 0 (UPDATE_PRESERVE)
260 */
261 Status = AcpiExPrepCommonFieldObject (
262 ObjDesc, FieldFlags, 0, BitOffset, BitCount);
263 if (ACPI_FAILURE (Status))
264 {
265 goto Cleanup;
266 }
267
268 ObjDesc->BufferField.BufferObj = BufferDesc;
269 ObjDesc->BufferField.IsCreateField = AmlOpcode == AML_CREATE_FIELD_OP;
270
271 /* Reference count for BufferDesc inherits ObjDesc count */
272
273 BufferDesc->Common.ReferenceCount = (UINT16)
274 (BufferDesc->Common.ReferenceCount + ObjDesc->Common.ReferenceCount);
275
276
277 Cleanup:
278
279 /* Always delete the operands */
280
281 AcpiUtRemoveReference (OffsetDesc);
282 AcpiUtRemoveReference (BufferDesc);
283
284 if (AmlOpcode == AML_CREATE_FIELD_OP)
285 {
286 AcpiUtRemoveReference (LengthDesc);
287 }
288
289 /* On failure, delete the result descriptor */
290
291 if (ACPI_FAILURE (Status))
292 {
293 AcpiUtRemoveReference (ResultDesc); /* Result descriptor */
294 }
295 else
296 {
297 /* Now the address and length are valid for this BufferField */
298
299 ObjDesc->BufferField.Flags |= AOPOBJ_DATA_VALID;
300 }
301
302 return_ACPI_STATUS (Status);
303 }
304
305
306 /*******************************************************************************
307 *
308 * FUNCTION: AcpiDsEvalBufferFieldOperands
309 *
310 * PARAMETERS: WalkState - Current walk
311 * Op - A valid BufferField Op object
312 *
313 * RETURN: Status
314 *
315 * DESCRIPTION: Get BufferField Buffer and Index
316 * Called from AcpiDsExecEndOp during BufferField parse tree walk
317 *
318 ******************************************************************************/
319
320 ACPI_STATUS
AcpiDsEvalBufferFieldOperands(ACPI_WALK_STATE * WalkState,ACPI_PARSE_OBJECT * Op)321 AcpiDsEvalBufferFieldOperands (
322 ACPI_WALK_STATE *WalkState,
323 ACPI_PARSE_OBJECT *Op)
324 {
325 ACPI_STATUS Status;
326 ACPI_OPERAND_OBJECT *ObjDesc;
327 ACPI_NAMESPACE_NODE *Node;
328 ACPI_PARSE_OBJECT *NextOp;
329
330
331 ACPI_FUNCTION_TRACE_PTR (DsEvalBufferFieldOperands, Op);
332
333
334 /*
335 * This is where we evaluate the address and length fields of the
336 * CreateXxxField declaration
337 */
338 Node = Op->Common.Node;
339
340 /* NextOp points to the op that holds the Buffer */
341
342 NextOp = Op->Common.Value.Arg;
343
344 /* Evaluate/create the address and length operands */
345
346 Status = AcpiDsCreateOperands (WalkState, NextOp);
347 if (ACPI_FAILURE (Status))
348 {
349 return_ACPI_STATUS (Status);
350 }
351
352 ObjDesc = AcpiNsGetAttachedObject (Node);
353 if (!ObjDesc)
354 {
355 return_ACPI_STATUS (AE_NOT_EXIST);
356 }
357
358 /* Resolve the operands */
359
360 Status = AcpiExResolveOperands (
361 Op->Common.AmlOpcode, ACPI_WALK_OPERANDS, WalkState);
362 if (ACPI_FAILURE (Status))
363 {
364 ACPI_ERROR ((AE_INFO, "(%s) bad operand(s), status 0x%X",
365 AcpiPsGetOpcodeName (Op->Common.AmlOpcode), Status));
366
367 return_ACPI_STATUS (Status);
368 }
369
370 /* Initialize the Buffer Field */
371
372 if (Op->Common.AmlOpcode == AML_CREATE_FIELD_OP)
373 {
374 /* NOTE: Slightly different operands for this opcode */
375
376 Status = AcpiDsInitBufferField (Op->Common.AmlOpcode, ObjDesc,
377 WalkState->Operands[0], WalkState->Operands[1],
378 WalkState->Operands[2], WalkState->Operands[3]);
379 }
380 else
381 {
382 /* All other, CreateXxxField opcodes */
383
384 Status = AcpiDsInitBufferField (Op->Common.AmlOpcode, ObjDesc,
385 WalkState->Operands[0], WalkState->Operands[1],
386 NULL, WalkState->Operands[2]);
387 }
388
389 return_ACPI_STATUS (Status);
390 }
391
392
393 /*******************************************************************************
394 *
395 * FUNCTION: AcpiDsEvalRegionOperands
396 *
397 * PARAMETERS: WalkState - Current walk
398 * Op - A valid region Op object
399 *
400 * RETURN: Status
401 *
402 * DESCRIPTION: Get region address and length
403 * Called from AcpiDsExecEndOp during OpRegion parse tree walk
404 *
405 ******************************************************************************/
406
407 ACPI_STATUS
AcpiDsEvalRegionOperands(ACPI_WALK_STATE * WalkState,ACPI_PARSE_OBJECT * Op)408 AcpiDsEvalRegionOperands (
409 ACPI_WALK_STATE *WalkState,
410 ACPI_PARSE_OBJECT *Op)
411 {
412 ACPI_STATUS Status;
413 ACPI_OPERAND_OBJECT *ObjDesc;
414 ACPI_OPERAND_OBJECT *OperandDesc;
415 ACPI_NAMESPACE_NODE *Node;
416 ACPI_PARSE_OBJECT *NextOp;
417 ACPI_ADR_SPACE_TYPE SpaceId;
418
419
420 ACPI_FUNCTION_TRACE_PTR (DsEvalRegionOperands, Op);
421
422
423 /*
424 * This is where we evaluate the address and length fields of the
425 * OpRegion declaration
426 */
427 Node = Op->Common.Node;
428
429 /* NextOp points to the op that holds the SpaceID */
430
431 NextOp = Op->Common.Value.Arg;
432 SpaceId = (ACPI_ADR_SPACE_TYPE) NextOp->Common.Value.Integer;
433
434 /* NextOp points to address op */
435
436 NextOp = NextOp->Common.Next;
437
438 /* Evaluate/create the address and length operands */
439
440 Status = AcpiDsCreateOperands (WalkState, NextOp);
441 if (ACPI_FAILURE (Status))
442 {
443 return_ACPI_STATUS (Status);
444 }
445
446 /* Resolve the length and address operands to numbers */
447
448 Status = AcpiExResolveOperands (
449 Op->Common.AmlOpcode, ACPI_WALK_OPERANDS, WalkState);
450 if (ACPI_FAILURE (Status))
451 {
452 return_ACPI_STATUS (Status);
453 }
454
455 ObjDesc = AcpiNsGetAttachedObject (Node);
456 if (!ObjDesc)
457 {
458 return_ACPI_STATUS (AE_NOT_EXIST);
459 }
460
461 /*
462 * Get the length operand and save it
463 * (at Top of stack)
464 */
465 OperandDesc = WalkState->Operands[WalkState->NumOperands - 1];
466
467 ObjDesc->Region.Length = (UINT32) OperandDesc->Integer.Value;
468 AcpiUtRemoveReference (OperandDesc);
469
470 /* A zero-length operation region is unusable. Just warn */
471
472 if (!ObjDesc->Region.Length && (SpaceId < ACPI_NUM_PREDEFINED_REGIONS))
473 {
474 ACPI_WARNING ((AE_INFO,
475 "Operation Region [%4.4s] has zero length (SpaceId %X)",
476 Node->Name.Ascii, SpaceId));
477 }
478
479 /*
480 * Get the address and save it
481 * (at top of stack - 1)
482 */
483 OperandDesc = WalkState->Operands[WalkState->NumOperands - 2];
484
485 ObjDesc->Region.Address = (ACPI_PHYSICAL_ADDRESS)
486 OperandDesc->Integer.Value;
487 AcpiUtRemoveReference (OperandDesc);
488
489 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
490 ObjDesc, ACPI_FORMAT_UINT64 (ObjDesc->Region.Address),
491 ObjDesc->Region.Length));
492
493 Status = AcpiUtAddAddressRange (ObjDesc->Region.SpaceId,
494 ObjDesc->Region.Address, ObjDesc->Region.Length, Node);
495
496 /* Now the address and length are valid for this opregion */
497
498 ObjDesc->Region.Flags |= AOPOBJ_DATA_VALID;
499 return_ACPI_STATUS (Status);
500 }
501
502
503 /*******************************************************************************
504 *
505 * FUNCTION: AcpiDsEvalTableRegionOperands
506 *
507 * PARAMETERS: WalkState - Current walk
508 * Op - A valid region Op object
509 *
510 * RETURN: Status
511 *
512 * DESCRIPTION: Get region address and length.
513 * Called from AcpiDsExecEndOp during DataTableRegion parse
514 * tree walk.
515 *
516 ******************************************************************************/
517
518 ACPI_STATUS
AcpiDsEvalTableRegionOperands(ACPI_WALK_STATE * WalkState,ACPI_PARSE_OBJECT * Op)519 AcpiDsEvalTableRegionOperands (
520 ACPI_WALK_STATE *WalkState,
521 ACPI_PARSE_OBJECT *Op)
522 {
523 ACPI_STATUS Status;
524 ACPI_OPERAND_OBJECT *ObjDesc;
525 ACPI_OPERAND_OBJECT **Operand;
526 ACPI_NAMESPACE_NODE *Node;
527 ACPI_PARSE_OBJECT *NextOp;
528 ACPI_TABLE_HEADER *Table;
529 UINT32 TableIndex;
530
531
532 ACPI_FUNCTION_TRACE_PTR (DsEvalTableRegionOperands, Op);
533
534
535 /*
536 * This is where we evaluate the Signature string, OemId string,
537 * and OemTableId string of the Data Table Region declaration
538 */
539 Node = Op->Common.Node;
540
541 /* NextOp points to Signature string op */
542
543 NextOp = Op->Common.Value.Arg;
544
545 /*
546 * Evaluate/create the Signature string, OemId string,
547 * and OemTableId string operands
548 */
549 Status = AcpiDsCreateOperands (WalkState, NextOp);
550 if (ACPI_FAILURE (Status))
551 {
552 return_ACPI_STATUS (Status);
553 }
554
555 Operand = &WalkState->Operands[0];
556
557 /*
558 * Resolve the Signature string, OemId string,
559 * and OemTableId string operands
560 */
561 Status = AcpiExResolveOperands (
562 Op->Common.AmlOpcode, ACPI_WALK_OPERANDS, WalkState);
563 if (ACPI_FAILURE (Status))
564 {
565 goto Cleanup;
566 }
567
568 /* Find the ACPI table */
569
570 Status = AcpiTbFindTable (
571 Operand[0]->String.Pointer,
572 Operand[1]->String.Pointer,
573 Operand[2]->String.Pointer, &TableIndex);
574 if (ACPI_FAILURE (Status))
575 {
576 if (Status == AE_NOT_FOUND)
577 {
578 ACPI_ERROR ((AE_INFO,
579 "ACPI Table [%4.4s] OEM:(%s, %s) not found in RSDT/XSDT",
580 Operand[0]->String.Pointer,
581 Operand[1]->String.Pointer,
582 Operand[2]->String.Pointer));
583 }
584 goto Cleanup;
585 }
586
587 Status = AcpiGetTableByIndex (TableIndex, &Table);
588 if (ACPI_FAILURE (Status))
589 {
590 goto Cleanup;
591 }
592
593 ObjDesc = AcpiNsGetAttachedObject (Node);
594 if (!ObjDesc)
595 {
596 Status = AE_NOT_EXIST;
597 goto Cleanup;
598 }
599
600 ObjDesc->Region.Address = ACPI_PTR_TO_PHYSADDR (Table);
601 ObjDesc->Region.Length = Table->Length;
602 ObjDesc->Region.Pointer = Table;
603
604 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
605 ObjDesc, ACPI_FORMAT_UINT64 (ObjDesc->Region.Address),
606 ObjDesc->Region.Length));
607
608 /* Now the address and length are valid for this opregion */
609
610 ObjDesc->Region.Flags |= AOPOBJ_DATA_VALID;
611
612 Cleanup:
613 AcpiUtRemoveReference (Operand[0]);
614 AcpiUtRemoveReference (Operand[1]);
615 AcpiUtRemoveReference (Operand[2]);
616
617 return_ACPI_STATUS (Status);
618 }
619
620
621 /*******************************************************************************
622 *
623 * FUNCTION: AcpiDsEvalDataObjectOperands
624 *
625 * PARAMETERS: WalkState - Current walk
626 * Op - A valid DataObject Op object
627 * ObjDesc - DataObject
628 *
629 * RETURN: Status
630 *
631 * DESCRIPTION: Get the operands and complete the following data object types:
632 * Buffer, Package.
633 *
634 ******************************************************************************/
635
636 ACPI_STATUS
AcpiDsEvalDataObjectOperands(ACPI_WALK_STATE * WalkState,ACPI_PARSE_OBJECT * Op,ACPI_OPERAND_OBJECT * ObjDesc)637 AcpiDsEvalDataObjectOperands (
638 ACPI_WALK_STATE *WalkState,
639 ACPI_PARSE_OBJECT *Op,
640 ACPI_OPERAND_OBJECT *ObjDesc)
641 {
642 ACPI_STATUS Status;
643 ACPI_OPERAND_OBJECT *ArgDesc;
644 UINT32 Length;
645
646
647 ACPI_FUNCTION_TRACE (DsEvalDataObjectOperands);
648
649
650 /* The first operand (for all of these data objects) is the length */
651
652 /*
653 * Set proper index into operand stack for AcpiDsObjStackPush
654 * invoked inside AcpiDsCreateOperand.
655 */
656 WalkState->OperandIndex = WalkState->NumOperands;
657
658 /* Ignore if child is not valid */
659
660 if (!Op->Common.Value.Arg)
661 {
662 ACPI_ERROR ((AE_INFO,
663 "Missing child while evaluating opcode %4.4X, Op %p",
664 Op->Common.AmlOpcode, Op));
665 return_ACPI_STATUS (AE_OK);
666 }
667
668 Status = AcpiDsCreateOperand (WalkState, Op->Common.Value.Arg, 1);
669 if (ACPI_FAILURE (Status))
670 {
671 return_ACPI_STATUS (Status);
672 }
673
674 Status = AcpiExResolveOperands (WalkState->Opcode,
675 &(WalkState->Operands [WalkState->NumOperands -1]),
676 WalkState);
677 if (ACPI_FAILURE (Status))
678 {
679 return_ACPI_STATUS (Status);
680 }
681
682 /* Extract length operand */
683
684 ArgDesc = WalkState->Operands [WalkState->NumOperands - 1];
685 Length = (UINT32) ArgDesc->Integer.Value;
686
687 /* Cleanup for length operand */
688
689 Status = AcpiDsObjStackPop (1, WalkState);
690 if (ACPI_FAILURE (Status))
691 {
692 return_ACPI_STATUS (Status);
693 }
694
695 AcpiUtRemoveReference (ArgDesc);
696
697 /*
698 * Create the actual data object
699 */
700 switch (Op->Common.AmlOpcode)
701 {
702 case AML_BUFFER_OP:
703
704 Status = AcpiDsBuildInternalBufferObj (
705 WalkState, Op, Length, &ObjDesc);
706 break;
707
708 case AML_PACKAGE_OP:
709 case AML_VARIABLE_PACKAGE_OP:
710
711 Status = AcpiDsBuildInternalPackageObj (
712 WalkState, Op, Length, &ObjDesc);
713 break;
714
715 default:
716
717 return_ACPI_STATUS (AE_AML_BAD_OPCODE);
718 }
719
720 if (ACPI_SUCCESS (Status))
721 {
722 /*
723 * Return the object in the WalkState, unless the parent is a package -
724 * in this case, the return object will be stored in the parse tree
725 * for the package.
726 */
727 if ((!Op->Common.Parent) ||
728 ((Op->Common.Parent->Common.AmlOpcode != AML_PACKAGE_OP) &&
729 (Op->Common.Parent->Common.AmlOpcode != AML_VARIABLE_PACKAGE_OP) &&
730 (Op->Common.Parent->Common.AmlOpcode != AML_NAME_OP)))
731 {
732 WalkState->ResultObj = ObjDesc;
733 }
734 }
735
736 return_ACPI_STATUS (Status);
737 }
738
739
740 /*******************************************************************************
741 *
742 * FUNCTION: AcpiDsEvalBankFieldOperands
743 *
744 * PARAMETERS: WalkState - Current walk
745 * Op - A valid BankField Op object
746 *
747 * RETURN: Status
748 *
749 * DESCRIPTION: Get BankField BankValue
750 * Called from AcpiDsExecEndOp during BankField parse tree walk
751 *
752 ******************************************************************************/
753
754 ACPI_STATUS
AcpiDsEvalBankFieldOperands(ACPI_WALK_STATE * WalkState,ACPI_PARSE_OBJECT * Op)755 AcpiDsEvalBankFieldOperands (
756 ACPI_WALK_STATE *WalkState,
757 ACPI_PARSE_OBJECT *Op)
758 {
759 ACPI_STATUS Status;
760 ACPI_OPERAND_OBJECT *ObjDesc;
761 ACPI_OPERAND_OBJECT *OperandDesc;
762 ACPI_NAMESPACE_NODE *Node;
763 ACPI_PARSE_OBJECT *NextOp;
764 ACPI_PARSE_OBJECT *Arg;
765
766
767 ACPI_FUNCTION_TRACE_PTR (DsEvalBankFieldOperands, Op);
768
769
770 /*
771 * This is where we evaluate the BankValue field of the
772 * BankField declaration
773 */
774
775 /* NextOp points to the op that holds the Region */
776
777 NextOp = Op->Common.Value.Arg;
778
779 /* NextOp points to the op that holds the Bank Register */
780
781 NextOp = NextOp->Common.Next;
782
783 /* NextOp points to the op that holds the Bank Value */
784
785 NextOp = NextOp->Common.Next;
786
787 /*
788 * Set proper index into operand stack for AcpiDsObjStackPush
789 * invoked inside AcpiDsCreateOperand.
790 *
791 * We use WalkState->Operands[0] to store the evaluated BankValue
792 */
793 WalkState->OperandIndex = 0;
794
795 Status = AcpiDsCreateOperand (WalkState, NextOp, 0);
796 if (ACPI_FAILURE (Status))
797 {
798 return_ACPI_STATUS (Status);
799 }
800
801 Status = AcpiExResolveToValue (&WalkState->Operands[0], WalkState);
802 if (ACPI_FAILURE (Status))
803 {
804 return_ACPI_STATUS (Status);
805 }
806
807 ACPI_DUMP_OPERANDS (ACPI_WALK_OPERANDS,
808 AcpiPsGetOpcodeName (Op->Common.AmlOpcode), 1);
809 /*
810 * Get the BankValue operand and save it
811 * (at Top of stack)
812 */
813 OperandDesc = WalkState->Operands[0];
814
815 /* Arg points to the start Bank Field */
816
817 Arg = AcpiPsGetArg (Op, 4);
818 while (Arg)
819 {
820 /* Ignore OFFSET and ACCESSAS terms here */
821
822 if (Arg->Common.AmlOpcode == AML_INT_NAMEDFIELD_OP)
823 {
824 Node = Arg->Common.Node;
825
826 ObjDesc = AcpiNsGetAttachedObject (Node);
827 if (!ObjDesc)
828 {
829 return_ACPI_STATUS (AE_NOT_EXIST);
830 }
831
832 ObjDesc->BankField.Value = (UINT32) OperandDesc->Integer.Value;
833 }
834
835 /* Move to next field in the list */
836
837 Arg = Arg->Common.Next;
838 }
839
840 AcpiUtRemoveReference (OperandDesc);
841 return_ACPI_STATUS (Status);
842 }
843