1 /******************************************************************************
2 *
3 * Module Name: dsopcode - Dispatcher support for regions and fields
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 #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, FALSE);
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_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 (ObjDesc, FieldFlags, 0,
263 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
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 (Op->Common.AmlOpcode,
361 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
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 (Op->Common.AmlOpcode,
447 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,
480 ACPI_FORMAT_NATIVE_UINT (ObjDesc->Region.Address),
481 ObjDesc->Region.Length));
482
483 /* Now the address and length are valid for this opregion */
484
485 ObjDesc->Region.Flags |= AOPOBJ_DATA_VALID;
486
487 return_ACPI_STATUS (Status);
488 }
489
490
491 /*******************************************************************************
492 *
493 * FUNCTION: AcpiDsEvalTableRegionOperands
494 *
495 * PARAMETERS: WalkState - Current walk
496 * Op - A valid region Op object
497 *
498 * RETURN: Status
499 *
500 * DESCRIPTION: Get region address and length.
501 * Called from AcpiDsExecEndOp during DataTableRegion parse
502 * tree walk.
503 *
504 ******************************************************************************/
505
506 ACPI_STATUS
AcpiDsEvalTableRegionOperands(ACPI_WALK_STATE * WalkState,ACPI_PARSE_OBJECT * Op)507 AcpiDsEvalTableRegionOperands (
508 ACPI_WALK_STATE *WalkState,
509 ACPI_PARSE_OBJECT *Op)
510 {
511 ACPI_STATUS Status;
512 ACPI_OPERAND_OBJECT *ObjDesc;
513 ACPI_OPERAND_OBJECT **Operand;
514 ACPI_NAMESPACE_NODE *Node;
515 ACPI_PARSE_OBJECT *NextOp;
516 UINT32 TableIndex;
517 ACPI_TABLE_HEADER *Table;
518
519
520 ACPI_FUNCTION_TRACE_PTR (DsEvalTableRegionOperands, Op);
521
522
523 /*
524 * This is where we evaluate the Signature string, OemId string,
525 * and OemTableId string of the Data Table Region declaration
526 */
527 Node = Op->Common.Node;
528
529 /* NextOp points to Signature string op */
530
531 NextOp = Op->Common.Value.Arg;
532
533 /*
534 * Evaluate/create the Signature string, OemId string,
535 * and OemTableId string operands
536 */
537 Status = AcpiDsCreateOperands (WalkState, NextOp);
538 if (ACPI_FAILURE (Status))
539 {
540 return_ACPI_STATUS (Status);
541 }
542
543 /*
544 * Resolve the Signature string, OemId string,
545 * and OemTableId string operands
546 */
547 Status = AcpiExResolveOperands (Op->Common.AmlOpcode,
548 ACPI_WALK_OPERANDS, WalkState);
549 if (ACPI_FAILURE (Status))
550 {
551 return_ACPI_STATUS (Status);
552 }
553
554 Operand = &WalkState->Operands[0];
555
556 /* Find the ACPI table */
557
558 Status = AcpiTbFindTable (Operand[0]->String.Pointer,
559 Operand[1]->String.Pointer, Operand[2]->String.Pointer,
560 &TableIndex);
561 if (ACPI_FAILURE (Status))
562 {
563 return_ACPI_STATUS (Status);
564 }
565
566 AcpiUtRemoveReference (Operand[0]);
567 AcpiUtRemoveReference (Operand[1]);
568 AcpiUtRemoveReference (Operand[2]);
569
570 Status = AcpiGetTableByIndex (TableIndex, &Table);
571 if (ACPI_FAILURE (Status))
572 {
573 return_ACPI_STATUS (Status);
574 }
575
576 ObjDesc = AcpiNsGetAttachedObject (Node);
577 if (!ObjDesc)
578 {
579 return_ACPI_STATUS (AE_NOT_EXIST);
580 }
581
582 ObjDesc->Region.Address = (ACPI_PHYSICAL_ADDRESS) ACPI_TO_INTEGER (Table);
583 ObjDesc->Region.Length = Table->Length;
584
585 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
586 ObjDesc,
587 ACPI_FORMAT_NATIVE_UINT (ObjDesc->Region.Address),
588 ObjDesc->Region.Length));
589
590 /* Now the address and length are valid for this opregion */
591
592 ObjDesc->Region.Flags |= AOPOBJ_DATA_VALID;
593
594 return_ACPI_STATUS (Status);
595 }
596
597
598 /*******************************************************************************
599 *
600 * FUNCTION: AcpiDsEvalDataObjectOperands
601 *
602 * PARAMETERS: WalkState - Current walk
603 * Op - A valid DataObject Op object
604 * ObjDesc - DataObject
605 *
606 * RETURN: Status
607 *
608 * DESCRIPTION: Get the operands and complete the following data object types:
609 * Buffer, Package.
610 *
611 ******************************************************************************/
612
613 ACPI_STATUS
AcpiDsEvalDataObjectOperands(ACPI_WALK_STATE * WalkState,ACPI_PARSE_OBJECT * Op,ACPI_OPERAND_OBJECT * ObjDesc)614 AcpiDsEvalDataObjectOperands (
615 ACPI_WALK_STATE *WalkState,
616 ACPI_PARSE_OBJECT *Op,
617 ACPI_OPERAND_OBJECT *ObjDesc)
618 {
619 ACPI_STATUS Status;
620 ACPI_OPERAND_OBJECT *ArgDesc;
621 UINT32 Length;
622
623
624 ACPI_FUNCTION_TRACE (DsEvalDataObjectOperands);
625
626
627 /* The first operand (for all of these data objects) is the length */
628
629 /*
630 * Set proper index into operand stack for AcpiDsObjStackPush
631 * invoked inside AcpiDsCreateOperand.
632 */
633 WalkState->OperandIndex = WalkState->NumOperands;
634
635 Status = AcpiDsCreateOperand (WalkState, Op->Common.Value.Arg, 1);
636 if (ACPI_FAILURE (Status))
637 {
638 return_ACPI_STATUS (Status);
639 }
640
641 Status = AcpiExResolveOperands (WalkState->Opcode,
642 &(WalkState->Operands [WalkState->NumOperands -1]),
643 WalkState);
644 if (ACPI_FAILURE (Status))
645 {
646 return_ACPI_STATUS (Status);
647 }
648
649 /* Extract length operand */
650
651 ArgDesc = WalkState->Operands [WalkState->NumOperands - 1];
652 Length = (UINT32) ArgDesc->Integer.Value;
653
654 /* Cleanup for length operand */
655
656 Status = AcpiDsObjStackPop (1, WalkState);
657 if (ACPI_FAILURE (Status))
658 {
659 return_ACPI_STATUS (Status);
660 }
661
662 AcpiUtRemoveReference (ArgDesc);
663
664 /*
665 * Create the actual data object
666 */
667 switch (Op->Common.AmlOpcode)
668 {
669 case AML_BUFFER_OP:
670
671 Status = AcpiDsBuildInternalBufferObj (WalkState, Op, Length, &ObjDesc);
672 break;
673
674 case AML_PACKAGE_OP:
675 case AML_VAR_PACKAGE_OP:
676
677 Status = AcpiDsBuildInternalPackageObj (WalkState, Op, Length, &ObjDesc);
678 break;
679
680 default:
681
682 return_ACPI_STATUS (AE_AML_BAD_OPCODE);
683 }
684
685 if (ACPI_SUCCESS (Status))
686 {
687 /*
688 * Return the object in the WalkState, unless the parent is a package -
689 * in this case, the return object will be stored in the parse tree
690 * for the package.
691 */
692 if ((!Op->Common.Parent) ||
693 ((Op->Common.Parent->Common.AmlOpcode != AML_PACKAGE_OP) &&
694 (Op->Common.Parent->Common.AmlOpcode != AML_VAR_PACKAGE_OP) &&
695 (Op->Common.Parent->Common.AmlOpcode != AML_NAME_OP)))
696 {
697 WalkState->ResultObj = ObjDesc;
698 }
699 }
700
701 return_ACPI_STATUS (Status);
702 }
703
704
705 /*******************************************************************************
706 *
707 * FUNCTION: AcpiDsEvalBankFieldOperands
708 *
709 * PARAMETERS: WalkState - Current walk
710 * Op - A valid BankField Op object
711 *
712 * RETURN: Status
713 *
714 * DESCRIPTION: Get BankField BankValue
715 * Called from AcpiDsExecEndOp during BankField parse tree walk
716 *
717 ******************************************************************************/
718
719 ACPI_STATUS
AcpiDsEvalBankFieldOperands(ACPI_WALK_STATE * WalkState,ACPI_PARSE_OBJECT * Op)720 AcpiDsEvalBankFieldOperands (
721 ACPI_WALK_STATE *WalkState,
722 ACPI_PARSE_OBJECT *Op)
723 {
724 ACPI_STATUS Status;
725 ACPI_OPERAND_OBJECT *ObjDesc;
726 ACPI_OPERAND_OBJECT *OperandDesc;
727 ACPI_NAMESPACE_NODE *Node;
728 ACPI_PARSE_OBJECT *NextOp;
729 ACPI_PARSE_OBJECT *Arg;
730
731
732 ACPI_FUNCTION_TRACE_PTR (DsEvalBankFieldOperands, Op);
733
734
735 /*
736 * This is where we evaluate the BankValue field of the
737 * BankField declaration
738 */
739
740 /* NextOp points to the op that holds the Region */
741
742 NextOp = Op->Common.Value.Arg;
743
744 /* NextOp points to the op that holds the Bank Register */
745
746 NextOp = NextOp->Common.Next;
747
748 /* NextOp points to the op that holds the Bank Value */
749
750 NextOp = NextOp->Common.Next;
751
752 /*
753 * Set proper index into operand stack for AcpiDsObjStackPush
754 * invoked inside AcpiDsCreateOperand.
755 *
756 * We use WalkState->Operands[0] to store the evaluated BankValue
757 */
758 WalkState->OperandIndex = 0;
759
760 Status = AcpiDsCreateOperand (WalkState, NextOp, 0);
761 if (ACPI_FAILURE (Status))
762 {
763 return_ACPI_STATUS (Status);
764 }
765
766 Status = AcpiExResolveToValue (&WalkState->Operands[0], WalkState);
767 if (ACPI_FAILURE (Status))
768 {
769 return_ACPI_STATUS (Status);
770 }
771
772 ACPI_DUMP_OPERANDS (ACPI_WALK_OPERANDS,
773 AcpiPsGetOpcodeName (Op->Common.AmlOpcode), 1);
774 /*
775 * Get the BankValue operand and save it
776 * (at Top of stack)
777 */
778 OperandDesc = WalkState->Operands[0];
779
780 /* Arg points to the start Bank Field */
781
782 Arg = AcpiPsGetArg (Op, 4);
783 while (Arg)
784 {
785 /* Ignore OFFSET and ACCESSAS terms here */
786
787 if (Arg->Common.AmlOpcode == AML_INT_NAMEDFIELD_OP)
788 {
789 Node = Arg->Common.Node;
790
791 ObjDesc = AcpiNsGetAttachedObject (Node);
792 if (!ObjDesc)
793 {
794 return_ACPI_STATUS (AE_NOT_EXIST);
795 }
796
797 ObjDesc->BankField.Value = (UINT32) OperandDesc->Integer.Value;
798 }
799
800 /* Move to next field in the list */
801
802 Arg = Arg->Common.Next;
803 }
804
805 AcpiUtRemoveReference (OperandDesc);
806 return_ACPI_STATUS (Status);
807 }
808