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[reactos.git] / reactos / drivers / bus / acpi / acpica / dispatcher / dsopcode.c
1 /******************************************************************************
2 *
3 * Module Name: dsopcode - Dispatcher support for regions and fields
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2017, 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 #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
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
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_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 ACPI_ERROR ((AE_INFO,
248 "Field [%4.4s] at %u exceeds Buffer [%4.4s] size %u (bits)",
249 AcpiUtGetNodeName (ResultDesc),
250 BitOffset + BitCount,
251 AcpiUtGetNodeName (BufferDesc->Buffer.Node),
252 8 * (UINT32) BufferDesc->Buffer.Length));
253 Status = AE_AML_BUFFER_LIMIT;
254 goto Cleanup;
255 }
256
257 /*
258 * Initialize areas of the field object that are common to all fields
259 * For FieldFlags, use LOCK_RULE = 0 (NO_LOCK),
260 * UPDATE_RULE = 0 (UPDATE_PRESERVE)
261 */
262 Status = AcpiExPrepCommonFieldObject (
263 ObjDesc, FieldFlags, 0, BitOffset, BitCount);
264 if (ACPI_FAILURE (Status))
265 {
266 goto Cleanup;
267 }
268
269 ObjDesc->BufferField.BufferObj = BufferDesc;
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
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
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
418
419 ACPI_FUNCTION_TRACE_PTR (DsEvalRegionOperands, Op);
420
421
422 /*
423 * This is where we evaluate the address and length fields of the
424 * OpRegion declaration
425 */
426 Node = Op->Common.Node;
427
428 /* NextOp points to the op that holds the SpaceID */
429
430 NextOp = Op->Common.Value.Arg;
431
432 /* NextOp points to address op */
433
434 NextOp = NextOp->Common.Next;
435
436 /* Evaluate/create the address and length operands */
437
438 Status = AcpiDsCreateOperands (WalkState, NextOp);
439 if (ACPI_FAILURE (Status))
440 {
441 return_ACPI_STATUS (Status);
442 }
443
444 /* Resolve the length and address operands to numbers */
445
446 Status = AcpiExResolveOperands (
447 Op->Common.AmlOpcode, ACPI_WALK_OPERANDS, WalkState);
448 if (ACPI_FAILURE (Status))
449 {
450 return_ACPI_STATUS (Status);
451 }
452
453 ObjDesc = AcpiNsGetAttachedObject (Node);
454 if (!ObjDesc)
455 {
456 return_ACPI_STATUS (AE_NOT_EXIST);
457 }
458
459 /*
460 * Get the length operand and save it
461 * (at Top of stack)
462 */
463 OperandDesc = WalkState->Operands[WalkState->NumOperands - 1];
464
465 ObjDesc->Region.Length = (UINT32) OperandDesc->Integer.Value;
466 AcpiUtRemoveReference (OperandDesc);
467
468 /*
469 * Get the address and save it
470 * (at top of stack - 1)
471 */
472 OperandDesc = WalkState->Operands[WalkState->NumOperands - 2];
473
474 ObjDesc->Region.Address = (ACPI_PHYSICAL_ADDRESS)
475 OperandDesc->Integer.Value;
476 AcpiUtRemoveReference (OperandDesc);
477
478 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
479 ObjDesc, ACPI_FORMAT_UINT64 (ObjDesc->Region.Address),
480 ObjDesc->Region.Length));
481
482 /* Now the address and length are valid for this opregion */
483
484 ObjDesc->Region.Flags |= AOPOBJ_DATA_VALID;
485 return_ACPI_STATUS (Status);
486 }
487
488
489 /*******************************************************************************
490 *
491 * FUNCTION: AcpiDsEvalTableRegionOperands
492 *
493 * PARAMETERS: WalkState - Current walk
494 * Op - A valid region Op object
495 *
496 * RETURN: Status
497 *
498 * DESCRIPTION: Get region address and length.
499 * Called from AcpiDsExecEndOp during DataTableRegion parse
500 * tree walk.
501 *
502 ******************************************************************************/
503
504 ACPI_STATUS
505 AcpiDsEvalTableRegionOperands (
506 ACPI_WALK_STATE *WalkState,
507 ACPI_PARSE_OBJECT *Op)
508 {
509 ACPI_STATUS Status;
510 ACPI_OPERAND_OBJECT *ObjDesc;
511 ACPI_OPERAND_OBJECT **Operand;
512 ACPI_NAMESPACE_NODE *Node;
513 ACPI_PARSE_OBJECT *NextOp;
514 ACPI_TABLE_HEADER *Table;
515 UINT32 TableIndex;
516
517
518 ACPI_FUNCTION_TRACE_PTR (DsEvalTableRegionOperands, Op);
519
520
521 /*
522 * This is where we evaluate the Signature string, OemId string,
523 * and OemTableId string of the Data Table Region declaration
524 */
525 Node = Op->Common.Node;
526
527 /* NextOp points to Signature string op */
528
529 NextOp = Op->Common.Value.Arg;
530
531 /*
532 * Evaluate/create the Signature string, OemId string,
533 * and OemTableId string operands
534 */
535 Status = AcpiDsCreateOperands (WalkState, NextOp);
536 if (ACPI_FAILURE (Status))
537 {
538 return_ACPI_STATUS (Status);
539 }
540
541 Operand = &WalkState->Operands[0];
542
543 /*
544 * Resolve the Signature string, OemId string,
545 * and OemTableId string operands
546 */
547 Status = AcpiExResolveOperands (
548 Op->Common.AmlOpcode, ACPI_WALK_OPERANDS, WalkState);
549 if (ACPI_FAILURE (Status))
550 {
551 goto Cleanup;
552 }
553
554 /* Find the ACPI table */
555
556 Status = AcpiTbFindTable (
557 Operand[0]->String.Pointer,
558 Operand[1]->String.Pointer,
559 Operand[2]->String.Pointer, &TableIndex);
560 if (ACPI_FAILURE (Status))
561 {
562 if (Status == AE_NOT_FOUND)
563 {
564 ACPI_ERROR ((AE_INFO,
565 "ACPI Table [%4.4s] OEM:(%s, %s) not found in RSDT/XSDT",
566 Operand[0]->String.Pointer,
567 Operand[1]->String.Pointer,
568 Operand[2]->String.Pointer));
569 }
570 goto Cleanup;
571 }
572
573 Status = AcpiGetTableByIndex (TableIndex, &Table);
574 if (ACPI_FAILURE (Status))
575 {
576 goto Cleanup;
577 }
578
579 ObjDesc = AcpiNsGetAttachedObject (Node);
580 if (!ObjDesc)
581 {
582 Status = AE_NOT_EXIST;
583 goto Cleanup;
584 }
585
586 ObjDesc->Region.Address = ACPI_PTR_TO_PHYSADDR (Table);
587 ObjDesc->Region.Length = Table->Length;
588
589 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
590 ObjDesc, ACPI_FORMAT_UINT64 (ObjDesc->Region.Address),
591 ObjDesc->Region.Length));
592
593 /* Now the address and length are valid for this opregion */
594
595 ObjDesc->Region.Flags |= AOPOBJ_DATA_VALID;
596
597 Cleanup:
598 AcpiUtRemoveReference (Operand[0]);
599 AcpiUtRemoveReference (Operand[1]);
600 AcpiUtRemoveReference (Operand[2]);
601
602 return_ACPI_STATUS (Status);
603 }
604
605
606 /*******************************************************************************
607 *
608 * FUNCTION: AcpiDsEvalDataObjectOperands
609 *
610 * PARAMETERS: WalkState - Current walk
611 * Op - A valid DataObject Op object
612 * ObjDesc - DataObject
613 *
614 * RETURN: Status
615 *
616 * DESCRIPTION: Get the operands and complete the following data object types:
617 * Buffer, Package.
618 *
619 ******************************************************************************/
620
621 ACPI_STATUS
622 AcpiDsEvalDataObjectOperands (
623 ACPI_WALK_STATE *WalkState,
624 ACPI_PARSE_OBJECT *Op,
625 ACPI_OPERAND_OBJECT *ObjDesc)
626 {
627 ACPI_STATUS Status;
628 ACPI_OPERAND_OBJECT *ArgDesc;
629 UINT32 Length;
630
631
632 ACPI_FUNCTION_TRACE (DsEvalDataObjectOperands);
633
634
635 /* The first operand (for all of these data objects) is the length */
636
637 /*
638 * Set proper index into operand stack for AcpiDsObjStackPush
639 * invoked inside AcpiDsCreateOperand.
640 */
641 WalkState->OperandIndex = WalkState->NumOperands;
642
643 Status = AcpiDsCreateOperand (WalkState, Op->Common.Value.Arg, 1);
644 if (ACPI_FAILURE (Status))
645 {
646 return_ACPI_STATUS (Status);
647 }
648
649 Status = AcpiExResolveOperands (WalkState->Opcode,
650 &(WalkState->Operands [WalkState->NumOperands -1]),
651 WalkState);
652 if (ACPI_FAILURE (Status))
653 {
654 return_ACPI_STATUS (Status);
655 }
656
657 /* Extract length operand */
658
659 ArgDesc = WalkState->Operands [WalkState->NumOperands - 1];
660 Length = (UINT32) ArgDesc->Integer.Value;
661
662 /* Cleanup for length operand */
663
664 Status = AcpiDsObjStackPop (1, WalkState);
665 if (ACPI_FAILURE (Status))
666 {
667 return_ACPI_STATUS (Status);
668 }
669
670 AcpiUtRemoveReference (ArgDesc);
671
672 /*
673 * Create the actual data object
674 */
675 switch (Op->Common.AmlOpcode)
676 {
677 case AML_BUFFER_OP:
678
679 Status = AcpiDsBuildInternalBufferObj (
680 WalkState, Op, Length, &ObjDesc);
681 break;
682
683 case AML_PACKAGE_OP:
684 case AML_VARIABLE_PACKAGE_OP:
685
686 Status = AcpiDsBuildInternalPackageObj (
687 WalkState, Op, Length, &ObjDesc);
688 break;
689
690 default:
691
692 return_ACPI_STATUS (AE_AML_BAD_OPCODE);
693 }
694
695 if (ACPI_SUCCESS (Status))
696 {
697 /*
698 * Return the object in the WalkState, unless the parent is a package -
699 * in this case, the return object will be stored in the parse tree
700 * for the package.
701 */
702 if ((!Op->Common.Parent) ||
703 ((Op->Common.Parent->Common.AmlOpcode != AML_PACKAGE_OP) &&
704 (Op->Common.Parent->Common.AmlOpcode != AML_VARIABLE_PACKAGE_OP) &&
705 (Op->Common.Parent->Common.AmlOpcode != AML_NAME_OP)))
706 {
707 WalkState->ResultObj = ObjDesc;
708 }
709 }
710
711 return_ACPI_STATUS (Status);
712 }
713
714
715 /*******************************************************************************
716 *
717 * FUNCTION: AcpiDsEvalBankFieldOperands
718 *
719 * PARAMETERS: WalkState - Current walk
720 * Op - A valid BankField Op object
721 *
722 * RETURN: Status
723 *
724 * DESCRIPTION: Get BankField BankValue
725 * Called from AcpiDsExecEndOp during BankField parse tree walk
726 *
727 ******************************************************************************/
728
729 ACPI_STATUS
730 AcpiDsEvalBankFieldOperands (
731 ACPI_WALK_STATE *WalkState,
732 ACPI_PARSE_OBJECT *Op)
733 {
734 ACPI_STATUS Status;
735 ACPI_OPERAND_OBJECT *ObjDesc;
736 ACPI_OPERAND_OBJECT *OperandDesc;
737 ACPI_NAMESPACE_NODE *Node;
738 ACPI_PARSE_OBJECT *NextOp;
739 ACPI_PARSE_OBJECT *Arg;
740
741
742 ACPI_FUNCTION_TRACE_PTR (DsEvalBankFieldOperands, Op);
743
744
745 /*
746 * This is where we evaluate the BankValue field of the
747 * BankField declaration
748 */
749
750 /* NextOp points to the op that holds the Region */
751
752 NextOp = Op->Common.Value.Arg;
753
754 /* NextOp points to the op that holds the Bank Register */
755
756 NextOp = NextOp->Common.Next;
757
758 /* NextOp points to the op that holds the Bank Value */
759
760 NextOp = NextOp->Common.Next;
761
762 /*
763 * Set proper index into operand stack for AcpiDsObjStackPush
764 * invoked inside AcpiDsCreateOperand.
765 *
766 * We use WalkState->Operands[0] to store the evaluated BankValue
767 */
768 WalkState->OperandIndex = 0;
769
770 Status = AcpiDsCreateOperand (WalkState, NextOp, 0);
771 if (ACPI_FAILURE (Status))
772 {
773 return_ACPI_STATUS (Status);
774 }
775
776 Status = AcpiExResolveToValue (&WalkState->Operands[0], WalkState);
777 if (ACPI_FAILURE (Status))
778 {
779 return_ACPI_STATUS (Status);
780 }
781
782 ACPI_DUMP_OPERANDS (ACPI_WALK_OPERANDS,
783 AcpiPsGetOpcodeName (Op->Common.AmlOpcode), 1);
784 /*
785 * Get the BankValue operand and save it
786 * (at Top of stack)
787 */
788 OperandDesc = WalkState->Operands[0];
789
790 /* Arg points to the start Bank Field */
791
792 Arg = AcpiPsGetArg (Op, 4);
793 while (Arg)
794 {
795 /* Ignore OFFSET and ACCESSAS terms here */
796
797 if (Arg->Common.AmlOpcode == AML_INT_NAMEDFIELD_OP)
798 {
799 Node = Arg->Common.Node;
800
801 ObjDesc = AcpiNsGetAttachedObject (Node);
802 if (!ObjDesc)
803 {
804 return_ACPI_STATUS (AE_NOT_EXIST);
805 }
806
807 ObjDesc->BankField.Value = (UINT32) OperandDesc->Integer.Value;
808 }
809
810 /* Move to next field in the list */
811
812 Arg = Arg->Common.Next;
813 }
814
815 AcpiUtRemoveReference (OperandDesc);
816 return_ACPI_STATUS (Status);
817 }
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