1 /******************************************************************************
2 *
3 * Module Name: dsopcode - Dispatcher support for regions and fields
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2016, 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 =
247 acpi_ex_prep_common_field_object(obj_desc, field_flags, 0,
248 bit_offset, bit_count);
249 if (ACPI_FAILURE(status)) {
250 goto cleanup;
251 }
252
253 obj_desc->buffer_field.buffer_obj = buffer_desc;
254
255 /* Reference count for buffer_desc inherits obj_desc count */
256
257 buffer_desc->common.reference_count = (u16)
258 (buffer_desc->common.reference_count +
259 obj_desc->common.reference_count);
260
261 cleanup:
262
263 /* Always delete the operands */
264
265 acpi_ut_remove_reference(offset_desc);
266 acpi_ut_remove_reference(buffer_desc);
267
268 if (aml_opcode == AML_CREATE_FIELD_OP) {
269 acpi_ut_remove_reference(length_desc);
270 }
271
272 /* On failure, delete the result descriptor */
273
274 if (ACPI_FAILURE(status)) {
275 acpi_ut_remove_reference(result_desc); /* Result descriptor */
276 } else {
277 /* Now the address and length are valid for this buffer_field */
278
279 obj_desc->buffer_field.flags |= AOPOBJ_DATA_VALID;
280 }
281
282 return_ACPI_STATUS(status);
283 }
284
285 /*******************************************************************************
286 *
287 * FUNCTION: acpi_ds_eval_buffer_field_operands
288 *
289 * PARAMETERS: walk_state - Current walk
290 * op - A valid buffer_field Op object
291 *
292 * RETURN: Status
293 *
294 * DESCRIPTION: Get buffer_field Buffer and Index
295 * Called from acpi_ds_exec_end_op during buffer_field parse tree walk
296 *
297 ******************************************************************************/
298
299 acpi_status
acpi_ds_eval_buffer_field_operands(struct acpi_walk_state * walk_state,union acpi_parse_object * op)300 acpi_ds_eval_buffer_field_operands(struct acpi_walk_state *walk_state,
301 union acpi_parse_object *op)
302 {
303 acpi_status status;
304 union acpi_operand_object *obj_desc;
305 struct acpi_namespace_node *node;
306 union acpi_parse_object *next_op;
307
308 ACPI_FUNCTION_TRACE_PTR(ds_eval_buffer_field_operands, op);
309
310 /*
311 * This is where we evaluate the address and length fields of the
312 * create_xxx_field declaration
313 */
314 node = op->common.node;
315
316 /* next_op points to the op that holds the Buffer */
317
318 next_op = op->common.value.arg;
319
320 /* Evaluate/create the address and length operands */
321
322 status = acpi_ds_create_operands(walk_state, next_op);
323 if (ACPI_FAILURE(status)) {
324 return_ACPI_STATUS(status);
325 }
326
327 obj_desc = acpi_ns_get_attached_object(node);
328 if (!obj_desc) {
329 return_ACPI_STATUS(AE_NOT_EXIST);
330 }
331
332 /* Resolve the operands */
333
334 status =
335 acpi_ex_resolve_operands(op->common.aml_opcode, ACPI_WALK_OPERANDS,
336 walk_state);
337 if (ACPI_FAILURE(status)) {
338 ACPI_ERROR((AE_INFO, "(%s) bad operand(s), status 0x%X",
339 acpi_ps_get_opcode_name(op->common.aml_opcode),
340 status));
341
342 return_ACPI_STATUS(status);
343 }
344
345 /* Initialize the Buffer Field */
346
347 if (op->common.aml_opcode == AML_CREATE_FIELD_OP) {
348
349 /* NOTE: Slightly different operands for this opcode */
350
351 status =
352 acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc,
353 walk_state->operands[0],
354 walk_state->operands[1],
355 walk_state->operands[2],
356 walk_state->operands[3]);
357 } else {
358 /* All other, create_xxx_field opcodes */
359
360 status =
361 acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc,
362 walk_state->operands[0],
363 walk_state->operands[1], NULL,
364 walk_state->operands[2]);
365 }
366
367 return_ACPI_STATUS(status);
368 }
369
370 /*******************************************************************************
371 *
372 * FUNCTION: acpi_ds_eval_region_operands
373 *
374 * PARAMETERS: walk_state - Current walk
375 * op - A valid region Op object
376 *
377 * RETURN: Status
378 *
379 * DESCRIPTION: Get region address and length
380 * Called from acpi_ds_exec_end_op during op_region parse tree walk
381 *
382 ******************************************************************************/
383
384 acpi_status
acpi_ds_eval_region_operands(struct acpi_walk_state * walk_state,union acpi_parse_object * op)385 acpi_ds_eval_region_operands(struct acpi_walk_state *walk_state,
386 union acpi_parse_object *op)
387 {
388 acpi_status status;
389 union acpi_operand_object *obj_desc;
390 union acpi_operand_object *operand_desc;
391 struct acpi_namespace_node *node;
392 union acpi_parse_object *next_op;
393
394 ACPI_FUNCTION_TRACE_PTR(ds_eval_region_operands, op);
395
396 /*
397 * This is where we evaluate the address and length fields of the
398 * op_region declaration
399 */
400 node = op->common.node;
401
402 /* next_op points to the op that holds the space_ID */
403
404 next_op = op->common.value.arg;
405
406 /* next_op points to address op */
407
408 next_op = next_op->common.next;
409
410 /* Evaluate/create the address and length operands */
411
412 status = acpi_ds_create_operands(walk_state, next_op);
413 if (ACPI_FAILURE(status)) {
414 return_ACPI_STATUS(status);
415 }
416
417 /* Resolve the length and address operands to numbers */
418
419 status =
420 acpi_ex_resolve_operands(op->common.aml_opcode, ACPI_WALK_OPERANDS,
421 walk_state);
422 if (ACPI_FAILURE(status)) {
423 return_ACPI_STATUS(status);
424 }
425
426 obj_desc = acpi_ns_get_attached_object(node);
427 if (!obj_desc) {
428 return_ACPI_STATUS(AE_NOT_EXIST);
429 }
430
431 /*
432 * Get the length operand and save it
433 * (at Top of stack)
434 */
435 operand_desc = walk_state->operands[walk_state->num_operands - 1];
436
437 obj_desc->region.length = (u32) operand_desc->integer.value;
438 acpi_ut_remove_reference(operand_desc);
439
440 /*
441 * Get the address and save it
442 * (at top of stack - 1)
443 */
444 operand_desc = walk_state->operands[walk_state->num_operands - 2];
445
446 obj_desc->region.address = (acpi_physical_address)
447 operand_desc->integer.value;
448 acpi_ut_remove_reference(operand_desc);
449
450 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
451 obj_desc,
452 ACPI_FORMAT_UINT64(obj_desc->region.address),
453 obj_desc->region.length));
454
455 /* Now the address and length are valid for this opregion */
456
457 obj_desc->region.flags |= AOPOBJ_DATA_VALID;
458 return_ACPI_STATUS(status);
459 }
460
461 /*******************************************************************************
462 *
463 * FUNCTION: acpi_ds_eval_table_region_operands
464 *
465 * PARAMETERS: walk_state - Current walk
466 * op - A valid region Op object
467 *
468 * RETURN: Status
469 *
470 * DESCRIPTION: Get region address and length.
471 * Called from acpi_ds_exec_end_op during data_table_region parse
472 * tree walk.
473 *
474 ******************************************************************************/
475
476 acpi_status
acpi_ds_eval_table_region_operands(struct acpi_walk_state * walk_state,union acpi_parse_object * op)477 acpi_ds_eval_table_region_operands(struct acpi_walk_state *walk_state,
478 union acpi_parse_object *op)
479 {
480 acpi_status status;
481 union acpi_operand_object *obj_desc;
482 union acpi_operand_object **operand;
483 struct acpi_namespace_node *node;
484 union acpi_parse_object *next_op;
485 struct acpi_table_header *table;
486 u32 table_index;
487
488 ACPI_FUNCTION_TRACE_PTR(ds_eval_table_region_operands, op);
489
490 /*
491 * This is where we evaluate the Signature string, oem_id string,
492 * and oem_table_id string of the Data Table Region declaration
493 */
494 node = op->common.node;
495
496 /* next_op points to Signature string op */
497
498 next_op = op->common.value.arg;
499
500 /*
501 * Evaluate/create the Signature string, oem_id string,
502 * and oem_table_id string operands
503 */
504 status = acpi_ds_create_operands(walk_state, next_op);
505 if (ACPI_FAILURE(status)) {
506 return_ACPI_STATUS(status);
507 }
508
509 operand = &walk_state->operands[0];
510
511 /*
512 * Resolve the Signature string, oem_id string,
513 * and oem_table_id string operands
514 */
515 status =
516 acpi_ex_resolve_operands(op->common.aml_opcode, ACPI_WALK_OPERANDS,
517 walk_state);
518 if (ACPI_FAILURE(status)) {
519 goto cleanup;
520 }
521
522 /* Find the ACPI table */
523
524 status = acpi_tb_find_table(operand[0]->string.pointer,
525 operand[1]->string.pointer,
526 operand[2]->string.pointer, &table_index);
527 if (ACPI_FAILURE(status)) {
528 if (status == AE_NOT_FOUND) {
529 ACPI_ERROR((AE_INFO,
530 "ACPI Table [%4.4s] OEM:(%s, %s) not found in RSDT/XSDT",
531 operand[0]->string.pointer,
532 operand[1]->string.pointer,
533 operand[2]->string.pointer));
534 }
535 goto cleanup;
536 }
537
538 status = acpi_get_table_by_index(table_index, &table);
539 if (ACPI_FAILURE(status)) {
540 goto cleanup;
541 }
542
543 obj_desc = acpi_ns_get_attached_object(node);
544 if (!obj_desc) {
545 status = AE_NOT_EXIST;
546 goto cleanup;
547 }
548
549 obj_desc->region.address = ACPI_PTR_TO_PHYSADDR(table);
550 obj_desc->region.length = table->length;
551
552 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
553 obj_desc,
554 ACPI_FORMAT_UINT64(obj_desc->region.address),
555 obj_desc->region.length));
556
557 /* Now the address and length are valid for this opregion */
558
559 obj_desc->region.flags |= AOPOBJ_DATA_VALID;
560
561 cleanup:
562 acpi_ut_remove_reference(operand[0]);
563 acpi_ut_remove_reference(operand[1]);
564 acpi_ut_remove_reference(operand[2]);
565
566 return_ACPI_STATUS(status);
567 }
568
569 /*******************************************************************************
570 *
571 * FUNCTION: acpi_ds_eval_data_object_operands
572 *
573 * PARAMETERS: walk_state - Current walk
574 * op - A valid data_object Op object
575 * obj_desc - data_object
576 *
577 * RETURN: Status
578 *
579 * DESCRIPTION: Get the operands and complete the following data object types:
580 * Buffer, Package.
581 *
582 ******************************************************************************/
583
584 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)585 acpi_ds_eval_data_object_operands(struct acpi_walk_state *walk_state,
586 union acpi_parse_object *op,
587 union acpi_operand_object *obj_desc)
588 {
589 acpi_status status;
590 union acpi_operand_object *arg_desc;
591 u32 length;
592
593 ACPI_FUNCTION_TRACE(ds_eval_data_object_operands);
594
595 /* The first operand (for all of these data objects) is the length */
596
597 /*
598 * Set proper index into operand stack for acpi_ds_obj_stack_push
599 * invoked inside acpi_ds_create_operand.
600 */
601 walk_state->operand_index = walk_state->num_operands;
602
603 status = acpi_ds_create_operand(walk_state, op->common.value.arg, 1);
604 if (ACPI_FAILURE(status)) {
605 return_ACPI_STATUS(status);
606 }
607
608 status = acpi_ex_resolve_operands(walk_state->opcode,
609 &(walk_state->
610 operands[walk_state->num_operands -
611 1]), walk_state);
612 if (ACPI_FAILURE(status)) {
613 return_ACPI_STATUS(status);
614 }
615
616 /* Extract length operand */
617
618 arg_desc = walk_state->operands[walk_state->num_operands - 1];
619 length = (u32) arg_desc->integer.value;
620
621 /* Cleanup for length operand */
622
623 status = acpi_ds_obj_stack_pop(1, walk_state);
624 if (ACPI_FAILURE(status)) {
625 return_ACPI_STATUS(status);
626 }
627
628 acpi_ut_remove_reference(arg_desc);
629
630 /*
631 * Create the actual data object
632 */
633 switch (op->common.aml_opcode) {
634 case AML_BUFFER_OP:
635
636 status =
637 acpi_ds_build_internal_buffer_obj(walk_state, op, length,
638 &obj_desc);
639 break;
640
641 case AML_PACKAGE_OP:
642 case AML_VAR_PACKAGE_OP:
643
644 status =
645 acpi_ds_build_internal_package_obj(walk_state, op, length,
646 &obj_desc);
647 break;
648
649 default:
650
651 return_ACPI_STATUS(AE_AML_BAD_OPCODE);
652 }
653
654 if (ACPI_SUCCESS(status)) {
655 /*
656 * Return the object in the walk_state, unless the parent is a package -
657 * in this case, the return object will be stored in the parse tree
658 * for the package.
659 */
660 if ((!op->common.parent) ||
661 ((op->common.parent->common.aml_opcode != AML_PACKAGE_OP) &&
662 (op->common.parent->common.aml_opcode !=
663 AML_VAR_PACKAGE_OP)
664 && (op->common.parent->common.aml_opcode !=
665 AML_NAME_OP))) {
666 walk_state->result_obj = obj_desc;
667 }
668 }
669
670 return_ACPI_STATUS(status);
671 }
672
673 /*******************************************************************************
674 *
675 * FUNCTION: acpi_ds_eval_bank_field_operands
676 *
677 * PARAMETERS: walk_state - Current walk
678 * op - A valid bank_field Op object
679 *
680 * RETURN: Status
681 *
682 * DESCRIPTION: Get bank_field bank_value
683 * Called from acpi_ds_exec_end_op during bank_field parse tree walk
684 *
685 ******************************************************************************/
686
687 acpi_status
acpi_ds_eval_bank_field_operands(struct acpi_walk_state * walk_state,union acpi_parse_object * op)688 acpi_ds_eval_bank_field_operands(struct acpi_walk_state *walk_state,
689 union acpi_parse_object *op)
690 {
691 acpi_status status;
692 union acpi_operand_object *obj_desc;
693 union acpi_operand_object *operand_desc;
694 struct acpi_namespace_node *node;
695 union acpi_parse_object *next_op;
696 union acpi_parse_object *arg;
697
698 ACPI_FUNCTION_TRACE_PTR(ds_eval_bank_field_operands, op);
699
700 /*
701 * This is where we evaluate the bank_value field of the
702 * bank_field declaration
703 */
704
705 /* next_op points to the op that holds the Region */
706
707 next_op = op->common.value.arg;
708
709 /* next_op points to the op that holds the Bank Register */
710
711 next_op = next_op->common.next;
712
713 /* next_op points to the op that holds the Bank Value */
714
715 next_op = next_op->common.next;
716
717 /*
718 * Set proper index into operand stack for acpi_ds_obj_stack_push
719 * invoked inside acpi_ds_create_operand.
720 *
721 * We use walk_state->Operands[0] to store the evaluated bank_value
722 */
723 walk_state->operand_index = 0;
724
725 status = acpi_ds_create_operand(walk_state, next_op, 0);
726 if (ACPI_FAILURE(status)) {
727 return_ACPI_STATUS(status);
728 }
729
730 status = acpi_ex_resolve_to_value(&walk_state->operands[0], walk_state);
731 if (ACPI_FAILURE(status)) {
732 return_ACPI_STATUS(status);
733 }
734
735 ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS,
736 acpi_ps_get_opcode_name(op->common.aml_opcode), 1);
737 /*
738 * Get the bank_value operand and save it
739 * (at Top of stack)
740 */
741 operand_desc = walk_state->operands[0];
742
743 /* Arg points to the start Bank Field */
744
745 arg = acpi_ps_get_arg(op, 4);
746 while (arg) {
747
748 /* Ignore OFFSET and ACCESSAS terms here */
749
750 if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) {
751 node = arg->common.node;
752
753 obj_desc = acpi_ns_get_attached_object(node);
754 if (!obj_desc) {
755 return_ACPI_STATUS(AE_NOT_EXIST);
756 }
757
758 obj_desc->bank_field.value =
759 (u32) operand_desc->integer.value;
760 }
761
762 /* Move to next field in the list */
763
764 arg = arg->common.next;
765 }
766
767 acpi_ut_remove_reference(operand_desc);
768 return_ACPI_STATUS(status);
769 }
770