1 /******************************************************************************
2 *
3 * Module Name: dsopcode - Dispatcher suport for regions and fields
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2011, 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/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 static acpi_status
59 acpi_ds_init_buffer_field(u16 aml_opcode,
60 union acpi_operand_object *obj_desc,
61 union acpi_operand_object *buffer_desc,
62 union acpi_operand_object *offset_desc,
63 union acpi_operand_object *length_desc,
64 union acpi_operand_object *result_desc);
65
66 /*******************************************************************************
67 *
68 * FUNCTION: acpi_ds_initialize_region
69 *
70 * PARAMETERS: obj_handle - Region namespace node
71 *
72 * RETURN: Status
73 *
74 * DESCRIPTION: Front end to ev_initialize_region
75 *
76 ******************************************************************************/
77
acpi_ds_initialize_region(acpi_handle obj_handle)78 acpi_status acpi_ds_initialize_region(acpi_handle obj_handle)
79 {
80 union acpi_operand_object *obj_desc;
81 acpi_status status;
82
83 obj_desc = acpi_ns_get_attached_object(obj_handle);
84
85 /* Namespace is NOT locked */
86
87 status = acpi_ev_initialize_region(obj_desc, FALSE);
88 return (status);
89 }
90
91 /*******************************************************************************
92 *
93 * FUNCTION: acpi_ds_init_buffer_field
94 *
95 * PARAMETERS: aml_opcode - create_xxx_field
96 * obj_desc - buffer_field object
97 * buffer_desc - Host Buffer
98 * offset_desc - Offset into buffer
99 * length_desc - Length of field (CREATE_FIELD_OP only)
100 * result_desc - Where to store the result
101 *
102 * RETURN: Status
103 *
104 * DESCRIPTION: Perform actual initialization of a buffer field
105 *
106 ******************************************************************************/
107
108 static acpi_status
acpi_ds_init_buffer_field(u16 aml_opcode,union acpi_operand_object * obj_desc,union acpi_operand_object * buffer_desc,union acpi_operand_object * offset_desc,union acpi_operand_object * length_desc,union acpi_operand_object * result_desc)109 acpi_ds_init_buffer_field(u16 aml_opcode,
110 union acpi_operand_object *obj_desc,
111 union acpi_operand_object *buffer_desc,
112 union acpi_operand_object *offset_desc,
113 union acpi_operand_object *length_desc,
114 union acpi_operand_object *result_desc)
115 {
116 u32 offset;
117 u32 bit_offset;
118 u32 bit_count;
119 u8 field_flags;
120 acpi_status status;
121
122 ACPI_FUNCTION_TRACE_PTR(ds_init_buffer_field, obj_desc);
123
124 /* Host object must be a Buffer */
125
126 if (buffer_desc->common.type != ACPI_TYPE_BUFFER) {
127 ACPI_ERROR((AE_INFO,
128 "Target of Create Field is not a Buffer object - %s",
129 acpi_ut_get_object_type_name(buffer_desc)));
130
131 status = AE_AML_OPERAND_TYPE;
132 goto cleanup;
133 }
134
135 /*
136 * The last parameter to all of these opcodes (result_desc) started
137 * out as a name_string, and should therefore now be a NS node
138 * after resolution in acpi_ex_resolve_operands().
139 */
140 if (ACPI_GET_DESCRIPTOR_TYPE(result_desc) != ACPI_DESC_TYPE_NAMED) {
141 ACPI_ERROR((AE_INFO,
142 "(%s) destination not a NS Node [%s]",
143 acpi_ps_get_opcode_name(aml_opcode),
144 acpi_ut_get_descriptor_name(result_desc)));
145
146 status = AE_AML_OPERAND_TYPE;
147 goto cleanup;
148 }
149
150 offset = (u32) offset_desc->integer.value;
151
152 /*
153 * Setup the Bit offsets and counts, according to the opcode
154 */
155 switch (aml_opcode) {
156 case AML_CREATE_FIELD_OP:
157
158 /* Offset is in bits, count is in bits */
159
160 field_flags = AML_FIELD_ACCESS_BYTE;
161 bit_offset = offset;
162 bit_count = (u32) length_desc->integer.value;
163
164 /* Must have a valid (>0) bit count */
165
166 if (bit_count == 0) {
167 ACPI_ERROR((AE_INFO,
168 "Attempt to CreateField of length zero"));
169 status = AE_AML_OPERAND_VALUE;
170 goto cleanup;
171 }
172 break;
173
174 case AML_CREATE_BIT_FIELD_OP:
175
176 /* Offset is in bits, Field is one bit */
177
178 bit_offset = offset;
179 bit_count = 1;
180 field_flags = AML_FIELD_ACCESS_BYTE;
181 break;
182
183 case AML_CREATE_BYTE_FIELD_OP:
184
185 /* Offset is in bytes, field is one byte */
186
187 bit_offset = 8 * offset;
188 bit_count = 8;
189 field_flags = AML_FIELD_ACCESS_BYTE;
190 break;
191
192 case AML_CREATE_WORD_FIELD_OP:
193
194 /* Offset is in bytes, field is one word */
195
196 bit_offset = 8 * offset;
197 bit_count = 16;
198 field_flags = AML_FIELD_ACCESS_WORD;
199 break;
200
201 case AML_CREATE_DWORD_FIELD_OP:
202
203 /* Offset is in bytes, field is one dword */
204
205 bit_offset = 8 * offset;
206 bit_count = 32;
207 field_flags = AML_FIELD_ACCESS_DWORD;
208 break;
209
210 case AML_CREATE_QWORD_FIELD_OP:
211
212 /* Offset is in bytes, field is one qword */
213
214 bit_offset = 8 * offset;
215 bit_count = 64;
216 field_flags = AML_FIELD_ACCESS_QWORD;
217 break;
218
219 default:
220
221 ACPI_ERROR((AE_INFO,
222 "Unknown field creation opcode 0x%02X",
223 aml_opcode));
224 status = AE_AML_BAD_OPCODE;
225 goto cleanup;
226 }
227
228 /* Entire field must fit within the current length of the buffer */
229
230 if ((bit_offset + bit_count) > (8 * (u32) buffer_desc->buffer.length)) {
231 ACPI_ERROR((AE_INFO,
232 "Field [%4.4s] at %u exceeds Buffer [%4.4s] size %u (bits)",
233 acpi_ut_get_node_name(result_desc),
234 bit_offset + bit_count,
235 acpi_ut_get_node_name(buffer_desc->buffer.node),
236 8 * (u32) buffer_desc->buffer.length));
237 status = AE_AML_BUFFER_LIMIT;
238 goto cleanup;
239 }
240
241 /*
242 * Initialize areas of the field object that are common to all fields
243 * For field_flags, use LOCK_RULE = 0 (NO_LOCK),
244 * UPDATE_RULE = 0 (UPDATE_PRESERVE)
245 */
246 status = acpi_ex_prep_common_field_object(obj_desc, field_flags, 0,
247 bit_offset, bit_count);
248 if (ACPI_FAILURE(status)) {
249 goto cleanup;
250 }
251
252 obj_desc->buffer_field.buffer_obj = buffer_desc;
253
254 /* Reference count for buffer_desc inherits obj_desc count */
255
256 buffer_desc->common.reference_count = (u16)
257 (buffer_desc->common.reference_count +
258 obj_desc->common.reference_count);
259
260 cleanup:
261
262 /* Always delete the operands */
263
264 acpi_ut_remove_reference(offset_desc);
265 acpi_ut_remove_reference(buffer_desc);
266
267 if (aml_opcode == AML_CREATE_FIELD_OP) {
268 acpi_ut_remove_reference(length_desc);
269 }
270
271 /* On failure, delete the result descriptor */
272
273 if (ACPI_FAILURE(status)) {
274 acpi_ut_remove_reference(result_desc); /* Result descriptor */
275 } else {
276 /* Now the address and length are valid for this buffer_field */
277
278 obj_desc->buffer_field.flags |= AOPOBJ_DATA_VALID;
279 }
280
281 return_ACPI_STATUS(status);
282 }
283
284 /*******************************************************************************
285 *
286 * FUNCTION: acpi_ds_eval_buffer_field_operands
287 *
288 * PARAMETERS: walk_state - Current walk
289 * Op - A valid buffer_field Op object
290 *
291 * RETURN: Status
292 *
293 * DESCRIPTION: Get buffer_field Buffer and Index
294 * Called from acpi_ds_exec_end_op during buffer_field parse tree walk
295 *
296 ******************************************************************************/
297
298 acpi_status
acpi_ds_eval_buffer_field_operands(struct acpi_walk_state * walk_state,union acpi_parse_object * op)299 acpi_ds_eval_buffer_field_operands(struct acpi_walk_state *walk_state,
300 union acpi_parse_object *op)
301 {
302 acpi_status status;
303 union acpi_operand_object *obj_desc;
304 struct acpi_namespace_node *node;
305 union acpi_parse_object *next_op;
306
307 ACPI_FUNCTION_TRACE_PTR(ds_eval_buffer_field_operands, op);
308
309 /*
310 * This is where we evaluate the address and length fields of the
311 * create_xxx_field declaration
312 */
313 node = op->common.node;
314
315 /* next_op points to the op that holds the Buffer */
316
317 next_op = op->common.value.arg;
318
319 /* Evaluate/create the address and length operands */
320
321 status = acpi_ds_create_operands(walk_state, next_op);
322 if (ACPI_FAILURE(status)) {
323 return_ACPI_STATUS(status);
324 }
325
326 obj_desc = acpi_ns_get_attached_object(node);
327 if (!obj_desc) {
328 return_ACPI_STATUS(AE_NOT_EXIST);
329 }
330
331 /* Resolve the operands */
332
333 status = acpi_ex_resolve_operands(op->common.aml_opcode,
334 ACPI_WALK_OPERANDS, walk_state);
335 if (ACPI_FAILURE(status)) {
336 ACPI_ERROR((AE_INFO, "(%s) bad operand(s), status 0x%X",
337 acpi_ps_get_opcode_name(op->common.aml_opcode),
338 status));
339
340 return_ACPI_STATUS(status);
341 }
342
343 /* Initialize the Buffer Field */
344
345 if (op->common.aml_opcode == AML_CREATE_FIELD_OP) {
346
347 /* NOTE: Slightly different operands for this opcode */
348
349 status =
350 acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc,
351 walk_state->operands[0],
352 walk_state->operands[1],
353 walk_state->operands[2],
354 walk_state->operands[3]);
355 } else {
356 /* All other, create_xxx_field opcodes */
357
358 status =
359 acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc,
360 walk_state->operands[0],
361 walk_state->operands[1], NULL,
362 walk_state->operands[2]);
363 }
364
365 return_ACPI_STATUS(status);
366 }
367
368 /*******************************************************************************
369 *
370 * FUNCTION: acpi_ds_eval_region_operands
371 *
372 * PARAMETERS: walk_state - Current walk
373 * Op - A valid region Op object
374 *
375 * RETURN: Status
376 *
377 * DESCRIPTION: Get region address and length
378 * Called from acpi_ds_exec_end_op during op_region parse tree walk
379 *
380 ******************************************************************************/
381
382 acpi_status
acpi_ds_eval_region_operands(struct acpi_walk_state * walk_state,union acpi_parse_object * op)383 acpi_ds_eval_region_operands(struct acpi_walk_state *walk_state,
384 union acpi_parse_object *op)
385 {
386 acpi_status status;
387 union acpi_operand_object *obj_desc;
388 union acpi_operand_object *operand_desc;
389 struct acpi_namespace_node *node;
390 union acpi_parse_object *next_op;
391
392 ACPI_FUNCTION_TRACE_PTR(ds_eval_region_operands, op);
393
394 /*
395 * This is where we evaluate the address and length fields of the
396 * op_region declaration
397 */
398 node = op->common.node;
399
400 /* next_op points to the op that holds the space_iD */
401
402 next_op = op->common.value.arg;
403
404 /* next_op points to address op */
405
406 next_op = next_op->common.next;
407
408 /* Evaluate/create the address and length operands */
409
410 status = acpi_ds_create_operands(walk_state, next_op);
411 if (ACPI_FAILURE(status)) {
412 return_ACPI_STATUS(status);
413 }
414
415 /* Resolve the length and address operands to numbers */
416
417 status = acpi_ex_resolve_operands(op->common.aml_opcode,
418 ACPI_WALK_OPERANDS, walk_state);
419 if (ACPI_FAILURE(status)) {
420 return_ACPI_STATUS(status);
421 }
422
423 obj_desc = acpi_ns_get_attached_object(node);
424 if (!obj_desc) {
425 return_ACPI_STATUS(AE_NOT_EXIST);
426 }
427
428 /*
429 * Get the length operand and save it
430 * (at Top of stack)
431 */
432 operand_desc = walk_state->operands[walk_state->num_operands - 1];
433
434 obj_desc->region.length = (u32) operand_desc->integer.value;
435 acpi_ut_remove_reference(operand_desc);
436
437 /*
438 * Get the address and save it
439 * (at top of stack - 1)
440 */
441 operand_desc = walk_state->operands[walk_state->num_operands - 2];
442
443 obj_desc->region.address = (acpi_physical_address)
444 operand_desc->integer.value;
445 acpi_ut_remove_reference(operand_desc);
446
447 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
448 obj_desc,
449 ACPI_FORMAT_NATIVE_UINT(obj_desc->region.address),
450 obj_desc->region.length));
451
452 /* Now the address and length are valid for this opregion */
453
454 obj_desc->region.flags |= AOPOBJ_DATA_VALID;
455
456 return_ACPI_STATUS(status);
457 }
458
459 /*******************************************************************************
460 *
461 * FUNCTION: acpi_ds_eval_table_region_operands
462 *
463 * PARAMETERS: walk_state - Current walk
464 * Op - A valid region Op object
465 *
466 * RETURN: Status
467 *
468 * DESCRIPTION: Get region address and length.
469 * Called from acpi_ds_exec_end_op during data_table_region parse
470 * tree walk.
471 *
472 ******************************************************************************/
473
474 acpi_status
acpi_ds_eval_table_region_operands(struct acpi_walk_state * walk_state,union acpi_parse_object * op)475 acpi_ds_eval_table_region_operands(struct acpi_walk_state *walk_state,
476 union acpi_parse_object *op)
477 {
478 acpi_status status;
479 union acpi_operand_object *obj_desc;
480 union acpi_operand_object **operand;
481 struct acpi_namespace_node *node;
482 union acpi_parse_object *next_op;
483 u32 table_index;
484 struct acpi_table_header *table;
485
486 ACPI_FUNCTION_TRACE_PTR(ds_eval_table_region_operands, op);
487
488 /*
489 * This is where we evaluate the signature_string and oem_iDString
490 * and oem_table_iDString of the data_table_region declaration
491 */
492 node = op->common.node;
493
494 /* next_op points to signature_string op */
495
496 next_op = op->common.value.arg;
497
498 /*
499 * Evaluate/create the signature_string and oem_iDString
500 * and oem_table_iDString operands
501 */
502 status = acpi_ds_create_operands(walk_state, next_op);
503 if (ACPI_FAILURE(status)) {
504 return_ACPI_STATUS(status);
505 }
506
507 /*
508 * Resolve the signature_string and oem_iDString
509 * and oem_table_iDString operands
510 */
511 status = acpi_ex_resolve_operands(op->common.aml_opcode,
512 ACPI_WALK_OPERANDS, walk_state);
513 if (ACPI_FAILURE(status)) {
514 return_ACPI_STATUS(status);
515 }
516
517 operand = &walk_state->operands[0];
518
519 /* Find the ACPI table */
520
521 status = acpi_tb_find_table(operand[0]->string.pointer,
522 operand[1]->string.pointer,
523 operand[2]->string.pointer, &table_index);
524 if (ACPI_FAILURE(status)) {
525 return_ACPI_STATUS(status);
526 }
527
528 acpi_ut_remove_reference(operand[0]);
529 acpi_ut_remove_reference(operand[1]);
530 acpi_ut_remove_reference(operand[2]);
531
532 status = acpi_get_table_by_index(table_index, &table);
533 if (ACPI_FAILURE(status)) {
534 return_ACPI_STATUS(status);
535 }
536
537 obj_desc = acpi_ns_get_attached_object(node);
538 if (!obj_desc) {
539 return_ACPI_STATUS(AE_NOT_EXIST);
540 }
541
542 obj_desc->region.address =
543 (acpi_physical_address) ACPI_TO_INTEGER(table);
544 obj_desc->region.length = table->length;
545
546 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
547 obj_desc,
548 ACPI_FORMAT_NATIVE_UINT(obj_desc->region.address),
549 obj_desc->region.length));
550
551 /* Now the address and length are valid for this opregion */
552
553 obj_desc->region.flags |= AOPOBJ_DATA_VALID;
554
555 return_ACPI_STATUS(status);
556 }
557
558 /*******************************************************************************
559 *
560 * FUNCTION: acpi_ds_eval_data_object_operands
561 *
562 * PARAMETERS: walk_state - Current walk
563 * Op - A valid data_object Op object
564 * obj_desc - data_object
565 *
566 * RETURN: Status
567 *
568 * DESCRIPTION: Get the operands and complete the following data object types:
569 * Buffer, Package.
570 *
571 ******************************************************************************/
572
573 acpi_status
acpi_ds_eval_data_object_operands(struct acpi_walk_state * walk_state,union acpi_parse_object * op,union acpi_operand_object * obj_desc)574 acpi_ds_eval_data_object_operands(struct acpi_walk_state *walk_state,
575 union acpi_parse_object *op,
576 union acpi_operand_object *obj_desc)
577 {
578 acpi_status status;
579 union acpi_operand_object *arg_desc;
580 u32 length;
581
582 ACPI_FUNCTION_TRACE(ds_eval_data_object_operands);
583
584 /* The first operand (for all of these data objects) is the length */
585
586 /*
587 * Set proper index into operand stack for acpi_ds_obj_stack_push
588 * invoked inside acpi_ds_create_operand.
589 */
590 walk_state->operand_index = walk_state->num_operands;
591
592 status = acpi_ds_create_operand(walk_state, op->common.value.arg, 1);
593 if (ACPI_FAILURE(status)) {
594 return_ACPI_STATUS(status);
595 }
596
597 status = acpi_ex_resolve_operands(walk_state->opcode,
598 &(walk_state->
599 operands[walk_state->num_operands -
600 1]), walk_state);
601 if (ACPI_FAILURE(status)) {
602 return_ACPI_STATUS(status);
603 }
604
605 /* Extract length operand */
606
607 arg_desc = walk_state->operands[walk_state->num_operands - 1];
608 length = (u32) arg_desc->integer.value;
609
610 /* Cleanup for length operand */
611
612 status = acpi_ds_obj_stack_pop(1, walk_state);
613 if (ACPI_FAILURE(status)) {
614 return_ACPI_STATUS(status);
615 }
616
617 acpi_ut_remove_reference(arg_desc);
618
619 /*
620 * Create the actual data object
621 */
622 switch (op->common.aml_opcode) {
623 case AML_BUFFER_OP:
624
625 status =
626 acpi_ds_build_internal_buffer_obj(walk_state, op, length,
627 &obj_desc);
628 break;
629
630 case AML_PACKAGE_OP:
631 case AML_VAR_PACKAGE_OP:
632
633 status =
634 acpi_ds_build_internal_package_obj(walk_state, op, length,
635 &obj_desc);
636 break;
637
638 default:
639 return_ACPI_STATUS(AE_AML_BAD_OPCODE);
640 }
641
642 if (ACPI_SUCCESS(status)) {
643 /*
644 * Return the object in the walk_state, unless the parent is a package -
645 * in this case, the return object will be stored in the parse tree
646 * for the package.
647 */
648 if ((!op->common.parent) ||
649 ((op->common.parent->common.aml_opcode != AML_PACKAGE_OP) &&
650 (op->common.parent->common.aml_opcode !=
651 AML_VAR_PACKAGE_OP)
652 && (op->common.parent->common.aml_opcode != AML_NAME_OP))) {
653 walk_state->result_obj = obj_desc;
654 }
655 }
656
657 return_ACPI_STATUS(status);
658 }
659
660 /*******************************************************************************
661 *
662 * FUNCTION: acpi_ds_eval_bank_field_operands
663 *
664 * PARAMETERS: walk_state - Current walk
665 * Op - A valid bank_field Op object
666 *
667 * RETURN: Status
668 *
669 * DESCRIPTION: Get bank_field bank_value
670 * Called from acpi_ds_exec_end_op during bank_field parse tree walk
671 *
672 ******************************************************************************/
673
674 acpi_status
acpi_ds_eval_bank_field_operands(struct acpi_walk_state * walk_state,union acpi_parse_object * op)675 acpi_ds_eval_bank_field_operands(struct acpi_walk_state *walk_state,
676 union acpi_parse_object *op)
677 {
678 acpi_status status;
679 union acpi_operand_object *obj_desc;
680 union acpi_operand_object *operand_desc;
681 struct acpi_namespace_node *node;
682 union acpi_parse_object *next_op;
683 union acpi_parse_object *arg;
684
685 ACPI_FUNCTION_TRACE_PTR(ds_eval_bank_field_operands, op);
686
687 /*
688 * This is where we evaluate the bank_value field of the
689 * bank_field declaration
690 */
691
692 /* next_op points to the op that holds the Region */
693
694 next_op = op->common.value.arg;
695
696 /* next_op points to the op that holds the Bank Register */
697
698 next_op = next_op->common.next;
699
700 /* next_op points to the op that holds the Bank Value */
701
702 next_op = next_op->common.next;
703
704 /*
705 * Set proper index into operand stack for acpi_ds_obj_stack_push
706 * invoked inside acpi_ds_create_operand.
707 *
708 * We use walk_state->Operands[0] to store the evaluated bank_value
709 */
710 walk_state->operand_index = 0;
711
712 status = acpi_ds_create_operand(walk_state, next_op, 0);
713 if (ACPI_FAILURE(status)) {
714 return_ACPI_STATUS(status);
715 }
716
717 status = acpi_ex_resolve_to_value(&walk_state->operands[0], walk_state);
718 if (ACPI_FAILURE(status)) {
719 return_ACPI_STATUS(status);
720 }
721
722 ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS,
723 acpi_ps_get_opcode_name(op->common.aml_opcode), 1);
724 /*
725 * Get the bank_value operand and save it
726 * (at Top of stack)
727 */
728 operand_desc = walk_state->operands[0];
729
730 /* Arg points to the start Bank Field */
731
732 arg = acpi_ps_get_arg(op, 4);
733 while (arg) {
734
735 /* Ignore OFFSET and ACCESSAS terms here */
736
737 if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) {
738 node = arg->common.node;
739
740 obj_desc = acpi_ns_get_attached_object(node);
741 if (!obj_desc) {
742 return_ACPI_STATUS(AE_NOT_EXIST);
743 }
744
745 obj_desc->bank_field.value =
746 (u32) operand_desc->integer.value;
747 }
748
749 /* Move to next field in the list */
750
751 arg = arg->common.next;
752 }
753
754 acpi_ut_remove_reference(operand_desc);
755 return_ACPI_STATUS(status);
756 }
757