1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2 /******************************************************************************
3 *
4 * Module Name: dsopcode - Dispatcher support for regions and fields
5 *
6 * Copyright (C) 2000 - 2019, Intel Corp.
7 *
8 *****************************************************************************/
9
10 #include <acpi/acpi.h>
11 #include "accommon.h"
12 #include "acparser.h"
13 #include "amlcode.h"
14 #include "acdispat.h"
15 #include "acinterp.h"
16 #include "acnamesp.h"
17 #include "acevents.h"
18 #include "actables.h"
19
20 #define _COMPONENT ACPI_DISPATCHER
21 ACPI_MODULE_NAME("dsopcode")
22
23 /* Local prototypes */
24 static acpi_status
25 acpi_ds_init_buffer_field(u16 aml_opcode,
26 union acpi_operand_object *obj_desc,
27 union acpi_operand_object *buffer_desc,
28 union acpi_operand_object *offset_desc,
29 union acpi_operand_object *length_desc,
30 union acpi_operand_object *result_desc);
31
32 /*******************************************************************************
33 *
34 * FUNCTION: acpi_ds_initialize_region
35 *
36 * PARAMETERS: obj_handle - Region namespace node
37 *
38 * RETURN: Status
39 *
40 * DESCRIPTION: Front end to ev_initialize_region
41 *
42 ******************************************************************************/
43
acpi_ds_initialize_region(acpi_handle obj_handle)44 acpi_status acpi_ds_initialize_region(acpi_handle obj_handle)
45 {
46 union acpi_operand_object *obj_desc;
47 acpi_status status;
48
49 obj_desc = acpi_ns_get_attached_object(obj_handle);
50
51 /* Namespace is NOT locked */
52
53 status = acpi_ev_initialize_region(obj_desc);
54 return (status);
55 }
56
57 /*******************************************************************************
58 *
59 * FUNCTION: acpi_ds_init_buffer_field
60 *
61 * PARAMETERS: aml_opcode - create_xxx_field
62 * obj_desc - buffer_field object
63 * buffer_desc - Host Buffer
64 * offset_desc - Offset into buffer
65 * length_desc - Length of field (CREATE_FIELD_OP only)
66 * result_desc - Where to store the result
67 *
68 * RETURN: Status
69 *
70 * DESCRIPTION: Perform actual initialization of a buffer field
71 *
72 ******************************************************************************/
73
74 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)75 acpi_ds_init_buffer_field(u16 aml_opcode,
76 union acpi_operand_object *obj_desc,
77 union acpi_operand_object *buffer_desc,
78 union acpi_operand_object *offset_desc,
79 union acpi_operand_object *length_desc,
80 union acpi_operand_object *result_desc)
81 {
82 u32 offset;
83 u32 bit_offset;
84 u32 bit_count;
85 u8 field_flags;
86 acpi_status status;
87
88 ACPI_FUNCTION_TRACE_PTR(ds_init_buffer_field, obj_desc);
89
90 /* Host object must be a Buffer */
91
92 if (buffer_desc->common.type != ACPI_TYPE_BUFFER) {
93 ACPI_ERROR((AE_INFO,
94 "Target of Create Field is not a Buffer object - %s",
95 acpi_ut_get_object_type_name(buffer_desc)));
96
97 status = AE_AML_OPERAND_TYPE;
98 goto cleanup;
99 }
100
101 /*
102 * The last parameter to all of these opcodes (result_desc) started
103 * out as a name_string, and should therefore now be a NS node
104 * after resolution in acpi_ex_resolve_operands().
105 */
106 if (ACPI_GET_DESCRIPTOR_TYPE(result_desc) != ACPI_DESC_TYPE_NAMED) {
107 ACPI_ERROR((AE_INFO,
108 "(%s) destination not a NS Node [%s]",
109 acpi_ps_get_opcode_name(aml_opcode),
110 acpi_ut_get_descriptor_name(result_desc)));
111
112 status = AE_AML_OPERAND_TYPE;
113 goto cleanup;
114 }
115
116 offset = (u32) offset_desc->integer.value;
117
118 /*
119 * Setup the Bit offsets and counts, according to the opcode
120 */
121 switch (aml_opcode) {
122 case AML_CREATE_FIELD_OP:
123
124 /* Offset is in bits, count is in bits */
125
126 field_flags = AML_FIELD_ACCESS_BYTE;
127 bit_offset = offset;
128 bit_count = (u32) length_desc->integer.value;
129
130 /* Must have a valid (>0) bit count */
131
132 if (bit_count == 0) {
133 ACPI_BIOS_ERROR((AE_INFO,
134 "Attempt to CreateField of length zero"));
135 status = AE_AML_OPERAND_VALUE;
136 goto cleanup;
137 }
138 break;
139
140 case AML_CREATE_BIT_FIELD_OP:
141
142 /* Offset is in bits, Field is one bit */
143
144 bit_offset = offset;
145 bit_count = 1;
146 field_flags = AML_FIELD_ACCESS_BYTE;
147 break;
148
149 case AML_CREATE_BYTE_FIELD_OP:
150
151 /* Offset is in bytes, field is one byte */
152
153 bit_offset = 8 * offset;
154 bit_count = 8;
155 field_flags = AML_FIELD_ACCESS_BYTE;
156 break;
157
158 case AML_CREATE_WORD_FIELD_OP:
159
160 /* Offset is in bytes, field is one word */
161
162 bit_offset = 8 * offset;
163 bit_count = 16;
164 field_flags = AML_FIELD_ACCESS_WORD;
165 break;
166
167 case AML_CREATE_DWORD_FIELD_OP:
168
169 /* Offset is in bytes, field is one dword */
170
171 bit_offset = 8 * offset;
172 bit_count = 32;
173 field_flags = AML_FIELD_ACCESS_DWORD;
174 break;
175
176 case AML_CREATE_QWORD_FIELD_OP:
177
178 /* Offset is in bytes, field is one qword */
179
180 bit_offset = 8 * offset;
181 bit_count = 64;
182 field_flags = AML_FIELD_ACCESS_QWORD;
183 break;
184
185 default:
186
187 ACPI_ERROR((AE_INFO,
188 "Unknown field creation opcode 0x%02X",
189 aml_opcode));
190 status = AE_AML_BAD_OPCODE;
191 goto cleanup;
192 }
193
194 /* Entire field must fit within the current length of the buffer */
195
196 if ((bit_offset + bit_count) > (8 * (u32)buffer_desc->buffer.length)) {
197 status = AE_AML_BUFFER_LIMIT;
198 ACPI_BIOS_EXCEPTION((AE_INFO, status,
199 "Field [%4.4s] at bit offset/length %u/%u "
200 "exceeds size of target Buffer (%u bits)",
201 acpi_ut_get_node_name(result_desc),
202 bit_offset, bit_count,
203 8 * (u32)buffer_desc->buffer.length));
204 goto cleanup;
205 }
206
207 /*
208 * Initialize areas of the field object that are common to all fields
209 * For field_flags, use LOCK_RULE = 0 (NO_LOCK),
210 * UPDATE_RULE = 0 (UPDATE_PRESERVE)
211 */
212 status =
213 acpi_ex_prep_common_field_object(obj_desc, field_flags, 0,
214 bit_offset, bit_count);
215 if (ACPI_FAILURE(status)) {
216 goto cleanup;
217 }
218
219 obj_desc->buffer_field.buffer_obj = buffer_desc;
220
221 /* Reference count for buffer_desc inherits obj_desc count */
222
223 buffer_desc->common.reference_count = (u16)
224 (buffer_desc->common.reference_count +
225 obj_desc->common.reference_count);
226
227 cleanup:
228
229 /* Always delete the operands */
230
231 acpi_ut_remove_reference(offset_desc);
232 acpi_ut_remove_reference(buffer_desc);
233
234 if (aml_opcode == AML_CREATE_FIELD_OP) {
235 acpi_ut_remove_reference(length_desc);
236 }
237
238 /* On failure, delete the result descriptor */
239
240 if (ACPI_FAILURE(status)) {
241 acpi_ut_remove_reference(result_desc); /* Result descriptor */
242 } else {
243 /* Now the address and length are valid for this buffer_field */
244
245 obj_desc->buffer_field.flags |= AOPOBJ_DATA_VALID;
246 }
247
248 return_ACPI_STATUS(status);
249 }
250
251 /*******************************************************************************
252 *
253 * FUNCTION: acpi_ds_eval_buffer_field_operands
254 *
255 * PARAMETERS: walk_state - Current walk
256 * op - A valid buffer_field Op object
257 *
258 * RETURN: Status
259 *
260 * DESCRIPTION: Get buffer_field Buffer and Index
261 * Called from acpi_ds_exec_end_op during buffer_field parse tree walk
262 *
263 ******************************************************************************/
264
265 acpi_status
acpi_ds_eval_buffer_field_operands(struct acpi_walk_state * walk_state,union acpi_parse_object * op)266 acpi_ds_eval_buffer_field_operands(struct acpi_walk_state *walk_state,
267 union acpi_parse_object *op)
268 {
269 acpi_status status;
270 union acpi_operand_object *obj_desc;
271 struct acpi_namespace_node *node;
272 union acpi_parse_object *next_op;
273
274 ACPI_FUNCTION_TRACE_PTR(ds_eval_buffer_field_operands, op);
275
276 /*
277 * This is where we evaluate the address and length fields of the
278 * create_xxx_field declaration
279 */
280 node = op->common.node;
281
282 /* next_op points to the op that holds the Buffer */
283
284 next_op = op->common.value.arg;
285
286 /* Evaluate/create the address and length operands */
287
288 status = acpi_ds_create_operands(walk_state, next_op);
289 if (ACPI_FAILURE(status)) {
290 return_ACPI_STATUS(status);
291 }
292
293 obj_desc = acpi_ns_get_attached_object(node);
294 if (!obj_desc) {
295 return_ACPI_STATUS(AE_NOT_EXIST);
296 }
297
298 /* Resolve the operands */
299
300 status =
301 acpi_ex_resolve_operands(op->common.aml_opcode, ACPI_WALK_OPERANDS,
302 walk_state);
303 if (ACPI_FAILURE(status)) {
304 ACPI_ERROR((AE_INFO, "(%s) bad operand(s), status 0x%X",
305 acpi_ps_get_opcode_name(op->common.aml_opcode),
306 status));
307
308 return_ACPI_STATUS(status);
309 }
310
311 /* Initialize the Buffer Field */
312
313 if (op->common.aml_opcode == AML_CREATE_FIELD_OP) {
314
315 /* NOTE: Slightly different operands for this opcode */
316
317 status =
318 acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc,
319 walk_state->operands[0],
320 walk_state->operands[1],
321 walk_state->operands[2],
322 walk_state->operands[3]);
323 } else {
324 /* All other, create_xxx_field opcodes */
325
326 status =
327 acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc,
328 walk_state->operands[0],
329 walk_state->operands[1], NULL,
330 walk_state->operands[2]);
331 }
332
333 return_ACPI_STATUS(status);
334 }
335
336 /*******************************************************************************
337 *
338 * FUNCTION: acpi_ds_eval_region_operands
339 *
340 * PARAMETERS: walk_state - Current walk
341 * op - A valid region Op object
342 *
343 * RETURN: Status
344 *
345 * DESCRIPTION: Get region address and length
346 * Called from acpi_ds_exec_end_op during op_region parse tree walk
347 *
348 ******************************************************************************/
349
350 acpi_status
acpi_ds_eval_region_operands(struct acpi_walk_state * walk_state,union acpi_parse_object * op)351 acpi_ds_eval_region_operands(struct acpi_walk_state *walk_state,
352 union acpi_parse_object *op)
353 {
354 acpi_status status;
355 union acpi_operand_object *obj_desc;
356 union acpi_operand_object *operand_desc;
357 struct acpi_namespace_node *node;
358 union acpi_parse_object *next_op;
359 acpi_adr_space_type space_id;
360
361 ACPI_FUNCTION_TRACE_PTR(ds_eval_region_operands, op);
362
363 /*
364 * This is where we evaluate the address and length fields of the
365 * op_region declaration
366 */
367 node = op->common.node;
368
369 /* next_op points to the op that holds the space_ID */
370
371 next_op = op->common.value.arg;
372 space_id = (acpi_adr_space_type)next_op->common.value.integer;
373
374 /* next_op points to address op */
375
376 next_op = next_op->common.next;
377
378 /* Evaluate/create the address and length operands */
379
380 status = acpi_ds_create_operands(walk_state, next_op);
381 if (ACPI_FAILURE(status)) {
382 return_ACPI_STATUS(status);
383 }
384
385 /* Resolve the length and address operands to numbers */
386
387 status =
388 acpi_ex_resolve_operands(op->common.aml_opcode, ACPI_WALK_OPERANDS,
389 walk_state);
390 if (ACPI_FAILURE(status)) {
391 return_ACPI_STATUS(status);
392 }
393
394 obj_desc = acpi_ns_get_attached_object(node);
395 if (!obj_desc) {
396 return_ACPI_STATUS(AE_NOT_EXIST);
397 }
398
399 /*
400 * Get the length operand and save it
401 * (at Top of stack)
402 */
403 operand_desc = walk_state->operands[walk_state->num_operands - 1];
404
405 obj_desc->region.length = (u32) operand_desc->integer.value;
406 acpi_ut_remove_reference(operand_desc);
407
408 /* A zero-length operation region is unusable. Just warn */
409
410 if (!obj_desc->region.length
411 && (space_id < ACPI_NUM_PREDEFINED_REGIONS)) {
412 ACPI_WARNING((AE_INFO,
413 "Operation Region [%4.4s] has zero length (SpaceId %X)",
414 node->name.ascii, space_id));
415 }
416
417 /*
418 * Get the address and save it
419 * (at top of stack - 1)
420 */
421 operand_desc = walk_state->operands[walk_state->num_operands - 2];
422
423 obj_desc->region.address = (acpi_physical_address)
424 operand_desc->integer.value;
425 acpi_ut_remove_reference(operand_desc);
426
427 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
428 obj_desc,
429 ACPI_FORMAT_UINT64(obj_desc->region.address),
430 obj_desc->region.length));
431
432 status = acpi_ut_add_address_range(obj_desc->region.space_id,
433 obj_desc->region.address,
434 obj_desc->region.length, node);
435
436 /* Now the address and length are valid for this opregion */
437
438 obj_desc->region.flags |= AOPOBJ_DATA_VALID;
439 return_ACPI_STATUS(status);
440 }
441
442 /*******************************************************************************
443 *
444 * FUNCTION: acpi_ds_eval_table_region_operands
445 *
446 * PARAMETERS: walk_state - Current walk
447 * op - A valid region Op object
448 *
449 * RETURN: Status
450 *
451 * DESCRIPTION: Get region address and length.
452 * Called from acpi_ds_exec_end_op during data_table_region parse
453 * tree walk.
454 *
455 ******************************************************************************/
456
457 acpi_status
acpi_ds_eval_table_region_operands(struct acpi_walk_state * walk_state,union acpi_parse_object * op)458 acpi_ds_eval_table_region_operands(struct acpi_walk_state *walk_state,
459 union acpi_parse_object *op)
460 {
461 acpi_status status;
462 union acpi_operand_object *obj_desc;
463 union acpi_operand_object **operand;
464 struct acpi_namespace_node *node;
465 union acpi_parse_object *next_op;
466 struct acpi_table_header *table;
467 u32 table_index;
468
469 ACPI_FUNCTION_TRACE_PTR(ds_eval_table_region_operands, op);
470
471 /*
472 * This is where we evaluate the Signature string, oem_id string,
473 * and oem_table_id string of the Data Table Region declaration
474 */
475 node = op->common.node;
476
477 /* next_op points to Signature string op */
478
479 next_op = op->common.value.arg;
480
481 /*
482 * Evaluate/create the Signature string, oem_id string,
483 * and oem_table_id string operands
484 */
485 status = acpi_ds_create_operands(walk_state, next_op);
486 if (ACPI_FAILURE(status)) {
487 return_ACPI_STATUS(status);
488 }
489
490 operand = &walk_state->operands[0];
491
492 /*
493 * Resolve the Signature string, oem_id string,
494 * and oem_table_id string operands
495 */
496 status =
497 acpi_ex_resolve_operands(op->common.aml_opcode, ACPI_WALK_OPERANDS,
498 walk_state);
499 if (ACPI_FAILURE(status)) {
500 goto cleanup;
501 }
502
503 /* Find the ACPI table */
504
505 status = acpi_tb_find_table(operand[0]->string.pointer,
506 operand[1]->string.pointer,
507 operand[2]->string.pointer, &table_index);
508 if (ACPI_FAILURE(status)) {
509 if (status == AE_NOT_FOUND) {
510 ACPI_ERROR((AE_INFO,
511 "ACPI Table [%4.4s] OEM:(%s, %s) not found in RSDT/XSDT",
512 operand[0]->string.pointer,
513 operand[1]->string.pointer,
514 operand[2]->string.pointer));
515 }
516 goto cleanup;
517 }
518
519 status = acpi_get_table_by_index(table_index, &table);
520 if (ACPI_FAILURE(status)) {
521 goto cleanup;
522 }
523
524 obj_desc = acpi_ns_get_attached_object(node);
525 if (!obj_desc) {
526 status = AE_NOT_EXIST;
527 goto cleanup;
528 }
529
530 obj_desc->region.address = ACPI_PTR_TO_PHYSADDR(table);
531 obj_desc->region.length = table->length;
532
533 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
534 obj_desc,
535 ACPI_FORMAT_UINT64(obj_desc->region.address),
536 obj_desc->region.length));
537
538 /* Now the address and length are valid for this opregion */
539
540 obj_desc->region.flags |= AOPOBJ_DATA_VALID;
541
542 cleanup:
543 acpi_ut_remove_reference(operand[0]);
544 acpi_ut_remove_reference(operand[1]);
545 acpi_ut_remove_reference(operand[2]);
546
547 return_ACPI_STATUS(status);
548 }
549
550 /*******************************************************************************
551 *
552 * FUNCTION: acpi_ds_eval_data_object_operands
553 *
554 * PARAMETERS: walk_state - Current walk
555 * op - A valid data_object Op object
556 * obj_desc - data_object
557 *
558 * RETURN: Status
559 *
560 * DESCRIPTION: Get the operands and complete the following data object types:
561 * Buffer, Package.
562 *
563 ******************************************************************************/
564
565 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)566 acpi_ds_eval_data_object_operands(struct acpi_walk_state *walk_state,
567 union acpi_parse_object *op,
568 union acpi_operand_object *obj_desc)
569 {
570 acpi_status status;
571 union acpi_operand_object *arg_desc;
572 u32 length;
573
574 ACPI_FUNCTION_TRACE(ds_eval_data_object_operands);
575
576 /* The first operand (for all of these data objects) is the length */
577
578 /*
579 * Set proper index into operand stack for acpi_ds_obj_stack_push
580 * invoked inside acpi_ds_create_operand.
581 */
582 walk_state->operand_index = walk_state->num_operands;
583
584 /* Ignore if child is not valid */
585
586 if (!op->common.value.arg) {
587 ACPI_ERROR((AE_INFO,
588 "Missing child while evaluating opcode %4.4X, Op %p",
589 op->common.aml_opcode, op));
590 return_ACPI_STATUS(AE_OK);
591 }
592
593 status = acpi_ds_create_operand(walk_state, op->common.value.arg, 1);
594 if (ACPI_FAILURE(status)) {
595 return_ACPI_STATUS(status);
596 }
597
598 status = acpi_ex_resolve_operands(walk_state->opcode,
599 &(walk_state->
600 operands[walk_state->num_operands -
601 1]), walk_state);
602 if (ACPI_FAILURE(status)) {
603 return_ACPI_STATUS(status);
604 }
605
606 /* Extract length operand */
607
608 arg_desc = walk_state->operands[walk_state->num_operands - 1];
609 length = (u32) arg_desc->integer.value;
610
611 /* Cleanup for length operand */
612
613 status = acpi_ds_obj_stack_pop(1, walk_state);
614 if (ACPI_FAILURE(status)) {
615 return_ACPI_STATUS(status);
616 }
617
618 acpi_ut_remove_reference(arg_desc);
619
620 /*
621 * Create the actual data object
622 */
623 switch (op->common.aml_opcode) {
624 case AML_BUFFER_OP:
625
626 status =
627 acpi_ds_build_internal_buffer_obj(walk_state, op, length,
628 &obj_desc);
629 break;
630
631 case AML_PACKAGE_OP:
632 case AML_VARIABLE_PACKAGE_OP:
633
634 status =
635 acpi_ds_build_internal_package_obj(walk_state, op, length,
636 &obj_desc);
637 break;
638
639 default:
640
641 return_ACPI_STATUS(AE_AML_BAD_OPCODE);
642 }
643
644 if (ACPI_SUCCESS(status)) {
645 /*
646 * Return the object in the walk_state, unless the parent is a package -
647 * in this case, the return object will be stored in the parse tree
648 * for the package.
649 */
650 if ((!op->common.parent) ||
651 ((op->common.parent->common.aml_opcode != AML_PACKAGE_OP) &&
652 (op->common.parent->common.aml_opcode !=
653 AML_VARIABLE_PACKAGE_OP)
654 && (op->common.parent->common.aml_opcode !=
655 AML_NAME_OP))) {
656 walk_state->result_obj = obj_desc;
657 }
658 }
659
660 return_ACPI_STATUS(status);
661 }
662
663 /*******************************************************************************
664 *
665 * FUNCTION: acpi_ds_eval_bank_field_operands
666 *
667 * PARAMETERS: walk_state - Current walk
668 * op - A valid bank_field Op object
669 *
670 * RETURN: Status
671 *
672 * DESCRIPTION: Get bank_field bank_value
673 * Called from acpi_ds_exec_end_op during bank_field parse tree walk
674 *
675 ******************************************************************************/
676
677 acpi_status
acpi_ds_eval_bank_field_operands(struct acpi_walk_state * walk_state,union acpi_parse_object * op)678 acpi_ds_eval_bank_field_operands(struct acpi_walk_state *walk_state,
679 union acpi_parse_object *op)
680 {
681 acpi_status status;
682 union acpi_operand_object *obj_desc;
683 union acpi_operand_object *operand_desc;
684 struct acpi_namespace_node *node;
685 union acpi_parse_object *next_op;
686 union acpi_parse_object *arg;
687
688 ACPI_FUNCTION_TRACE_PTR(ds_eval_bank_field_operands, op);
689
690 /*
691 * This is where we evaluate the bank_value field of the
692 * bank_field declaration
693 */
694
695 /* next_op points to the op that holds the Region */
696
697 next_op = op->common.value.arg;
698
699 /* next_op points to the op that holds the Bank Register */
700
701 next_op = next_op->common.next;
702
703 /* next_op points to the op that holds the Bank Value */
704
705 next_op = next_op->common.next;
706
707 /*
708 * Set proper index into operand stack for acpi_ds_obj_stack_push
709 * invoked inside acpi_ds_create_operand.
710 *
711 * We use walk_state->Operands[0] to store the evaluated bank_value
712 */
713 walk_state->operand_index = 0;
714
715 status = acpi_ds_create_operand(walk_state, next_op, 0);
716 if (ACPI_FAILURE(status)) {
717 return_ACPI_STATUS(status);
718 }
719
720 status = acpi_ex_resolve_to_value(&walk_state->operands[0], walk_state);
721 if (ACPI_FAILURE(status)) {
722 return_ACPI_STATUS(status);
723 }
724
725 ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS,
726 acpi_ps_get_opcode_name(op->common.aml_opcode), 1);
727 /*
728 * Get the bank_value operand and save it
729 * (at Top of stack)
730 */
731 operand_desc = walk_state->operands[0];
732
733 /* Arg points to the start Bank Field */
734
735 arg = acpi_ps_get_arg(op, 4);
736 while (arg) {
737
738 /* Ignore OFFSET and ACCESSAS terms here */
739
740 if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) {
741 node = arg->common.node;
742
743 obj_desc = acpi_ns_get_attached_object(node);
744 if (!obj_desc) {
745 return_ACPI_STATUS(AE_NOT_EXIST);
746 }
747
748 obj_desc->bank_field.value =
749 (u32) operand_desc->integer.value;
750 }
751
752 /* Move to next field in the list */
753
754 arg = arg->common.next;
755 }
756
757 acpi_ut_remove_reference(operand_desc);
758 return_ACPI_STATUS(status);
759 }
760
