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/drivers/acpi/acpica/dsopcode.c

http://github.com/mirrors/linux
C | 761 lines | 394 code | 158 blank | 209 comment | 47 complexity | aa765ad7aacf353edae28c1f1889f47a MD5 | raw file
  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 - 2020, 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
 21ACPI_MODULE_NAME("dsopcode")
 22
 23/* Local prototypes */
 24static acpi_status
 25acpi_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
 44acpi_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
 74static acpi_status
 75acpi_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	obj_desc->buffer_field.is_create_field =
221	    aml_opcode == AML_CREATE_FIELD_OP;
222
223	/* Reference count for buffer_desc inherits obj_desc count */
224
225	buffer_desc->common.reference_count = (u16)
226	    (buffer_desc->common.reference_count +
227	     obj_desc->common.reference_count);
228
229cleanup:
230
231	/* Always delete the operands */
232
233	acpi_ut_remove_reference(offset_desc);
234	acpi_ut_remove_reference(buffer_desc);
235
236	if (aml_opcode == AML_CREATE_FIELD_OP) {
237		acpi_ut_remove_reference(length_desc);
238	}
239
240	/* On failure, delete the result descriptor */
241
242	if (ACPI_FAILURE(status)) {
243		acpi_ut_remove_reference(result_desc);	/* Result descriptor */
244	} else {
245		/* Now the address and length are valid for this buffer_field */
246
247		obj_desc->buffer_field.flags |= AOPOBJ_DATA_VALID;
248	}
249
250	return_ACPI_STATUS(status);
251}
252
253/*******************************************************************************
254 *
255 * FUNCTION:    acpi_ds_eval_buffer_field_operands
256 *
257 * PARAMETERS:  walk_state      - Current walk
258 *              op              - A valid buffer_field Op object
259 *
260 * RETURN:      Status
261 *
262 * DESCRIPTION: Get buffer_field Buffer and Index
263 *              Called from acpi_ds_exec_end_op during buffer_field parse tree walk
264 *
265 ******************************************************************************/
266
267acpi_status
268acpi_ds_eval_buffer_field_operands(struct acpi_walk_state *walk_state,
269				   union acpi_parse_object *op)
270{
271	acpi_status status;
272	union acpi_operand_object *obj_desc;
273	struct acpi_namespace_node *node;
274	union acpi_parse_object *next_op;
275
276	ACPI_FUNCTION_TRACE_PTR(ds_eval_buffer_field_operands, op);
277
278	/*
279	 * This is where we evaluate the address and length fields of the
280	 * create_xxx_field declaration
281	 */
282	node = op->common.node;
283
284	/* next_op points to the op that holds the Buffer */
285
286	next_op = op->common.value.arg;
287
288	/* Evaluate/create the address and length operands */
289
290	status = acpi_ds_create_operands(walk_state, next_op);
291	if (ACPI_FAILURE(status)) {
292		return_ACPI_STATUS(status);
293	}
294
295	obj_desc = acpi_ns_get_attached_object(node);
296	if (!obj_desc) {
297		return_ACPI_STATUS(AE_NOT_EXIST);
298	}
299
300	/* Resolve the operands */
301
302	status =
303	    acpi_ex_resolve_operands(op->common.aml_opcode, ACPI_WALK_OPERANDS,
304				     walk_state);
305	if (ACPI_FAILURE(status)) {
306		ACPI_ERROR((AE_INFO, "(%s) bad operand(s), status 0x%X",
307			    acpi_ps_get_opcode_name(op->common.aml_opcode),
308			    status));
309
310		return_ACPI_STATUS(status);
311	}
312
313	/* Initialize the Buffer Field */
314
315	if (op->common.aml_opcode == AML_CREATE_FIELD_OP) {
316
317		/* NOTE: Slightly different operands for this opcode */
318
319		status =
320		    acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc,
321					      walk_state->operands[0],
322					      walk_state->operands[1],
323					      walk_state->operands[2],
324					      walk_state->operands[3]);
325	} else {
326		/* All other, create_xxx_field opcodes */
327
328		status =
329		    acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc,
330					      walk_state->operands[0],
331					      walk_state->operands[1], NULL,
332					      walk_state->operands[2]);
333	}
334
335	return_ACPI_STATUS(status);
336}
337
338/*******************************************************************************
339 *
340 * FUNCTION:    acpi_ds_eval_region_operands
341 *
342 * PARAMETERS:  walk_state      - Current walk
343 *              op              - A valid region Op object
344 *
345 * RETURN:      Status
346 *
347 * DESCRIPTION: Get region address and length
348 *              Called from acpi_ds_exec_end_op during op_region parse tree walk
349 *
350 ******************************************************************************/
351
352acpi_status
353acpi_ds_eval_region_operands(struct acpi_walk_state *walk_state,
354			     union acpi_parse_object *op)
355{
356	acpi_status status;
357	union acpi_operand_object *obj_desc;
358	union acpi_operand_object *operand_desc;
359	struct acpi_namespace_node *node;
360	union acpi_parse_object *next_op;
361	acpi_adr_space_type space_id;
362
363	ACPI_FUNCTION_TRACE_PTR(ds_eval_region_operands, op);
364
365	/*
366	 * This is where we evaluate the address and length fields of the
367	 * op_region declaration
368	 */
369	node = op->common.node;
370
371	/* next_op points to the op that holds the space_ID */
372
373	next_op = op->common.value.arg;
374	space_id = (acpi_adr_space_type)next_op->common.value.integer;
375
376	/* next_op points to address op */
377
378	next_op = next_op->common.next;
379
380	/* Evaluate/create the address and length operands */
381
382	status = acpi_ds_create_operands(walk_state, next_op);
383	if (ACPI_FAILURE(status)) {
384		return_ACPI_STATUS(status);
385	}
386
387	/* Resolve the length and address operands to numbers */
388
389	status =
390	    acpi_ex_resolve_operands(op->common.aml_opcode, ACPI_WALK_OPERANDS,
391				     walk_state);
392	if (ACPI_FAILURE(status)) {
393		return_ACPI_STATUS(status);
394	}
395
396	obj_desc = acpi_ns_get_attached_object(node);
397	if (!obj_desc) {
398		return_ACPI_STATUS(AE_NOT_EXIST);
399	}
400
401	/*
402	 * Get the length operand and save it
403	 * (at Top of stack)
404	 */
405	operand_desc = walk_state->operands[walk_state->num_operands - 1];
406
407	obj_desc->region.length = (u32) operand_desc->integer.value;
408	acpi_ut_remove_reference(operand_desc);
409
410	/* A zero-length operation region is unusable. Just warn */
411
412	if (!obj_desc->region.length
413	    && (space_id < ACPI_NUM_PREDEFINED_REGIONS)) {
414		ACPI_WARNING((AE_INFO,
415			      "Operation Region [%4.4s] has zero length (SpaceId %X)",
416			      node->name.ascii, space_id));
417	}
418
419	/*
420	 * Get the address and save it
421	 * (at top of stack - 1)
422	 */
423	operand_desc = walk_state->operands[walk_state->num_operands - 2];
424
425	obj_desc->region.address = (acpi_physical_address)
426	    operand_desc->integer.value;
427	acpi_ut_remove_reference(operand_desc);
428
429	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
430			  obj_desc,
431			  ACPI_FORMAT_UINT64(obj_desc->region.address),
432			  obj_desc->region.length));
433
434	status = acpi_ut_add_address_range(obj_desc->region.space_id,
435					   obj_desc->region.address,
436					   obj_desc->region.length, node);
437
438	/* Now the address and length are valid for this opregion */
439
440	obj_desc->region.flags |= AOPOBJ_DATA_VALID;
441	return_ACPI_STATUS(status);
442}
443
444/*******************************************************************************
445 *
446 * FUNCTION:    acpi_ds_eval_table_region_operands
447 *
448 * PARAMETERS:  walk_state      - Current walk
449 *              op              - A valid region Op object
450 *
451 * RETURN:      Status
452 *
453 * DESCRIPTION: Get region address and length.
454 *              Called from acpi_ds_exec_end_op during data_table_region parse
455 *              tree walk.
456 *
457 ******************************************************************************/
458
459acpi_status
460acpi_ds_eval_table_region_operands(struct acpi_walk_state *walk_state,
461				   union acpi_parse_object *op)
462{
463	acpi_status status;
464	union acpi_operand_object *obj_desc;
465	union acpi_operand_object **operand;
466	struct acpi_namespace_node *node;
467	union acpi_parse_object *next_op;
468	struct acpi_table_header *table;
469	u32 table_index;
470
471	ACPI_FUNCTION_TRACE_PTR(ds_eval_table_region_operands, op);
472
473	/*
474	 * This is where we evaluate the Signature string, oem_id string,
475	 * and oem_table_id string of the Data Table Region declaration
476	 */
477	node = op->common.node;
478
479	/* next_op points to Signature string op */
480
481	next_op = op->common.value.arg;
482
483	/*
484	 * Evaluate/create the Signature string, oem_id string,
485	 * and oem_table_id string operands
486	 */
487	status = acpi_ds_create_operands(walk_state, next_op);
488	if (ACPI_FAILURE(status)) {
489		return_ACPI_STATUS(status);
490	}
491
492	operand = &walk_state->operands[0];
493
494	/*
495	 * Resolve the Signature string, oem_id string,
496	 * and oem_table_id string operands
497	 */
498	status =
499	    acpi_ex_resolve_operands(op->common.aml_opcode, ACPI_WALK_OPERANDS,
500				     walk_state);
501	if (ACPI_FAILURE(status)) {
502		goto cleanup;
503	}
504
505	/* Find the ACPI table */
506
507	status = acpi_tb_find_table(operand[0]->string.pointer,
508				    operand[1]->string.pointer,
509				    operand[2]->string.pointer, &table_index);
510	if (ACPI_FAILURE(status)) {
511		if (status == AE_NOT_FOUND) {
512			ACPI_ERROR((AE_INFO,
513				    "ACPI Table [%4.4s] OEM:(%s, %s) not found in RSDT/XSDT",
514				    operand[0]->string.pointer,
515				    operand[1]->string.pointer,
516				    operand[2]->string.pointer));
517		}
518		goto cleanup;
519	}
520
521	status = acpi_get_table_by_index(table_index, &table);
522	if (ACPI_FAILURE(status)) {
523		goto cleanup;
524	}
525
526	obj_desc = acpi_ns_get_attached_object(node);
527	if (!obj_desc) {
528		status = AE_NOT_EXIST;
529		goto cleanup;
530	}
531
532	obj_desc->region.address = ACPI_PTR_TO_PHYSADDR(table);
533	obj_desc->region.length = table->length;
534
535	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
536			  obj_desc,
537			  ACPI_FORMAT_UINT64(obj_desc->region.address),
538			  obj_desc->region.length));
539
540	/* Now the address and length are valid for this opregion */
541
542	obj_desc->region.flags |= AOPOBJ_DATA_VALID;
543
544cleanup:
545	acpi_ut_remove_reference(operand[0]);
546	acpi_ut_remove_reference(operand[1]);
547	acpi_ut_remove_reference(operand[2]);
548
549	return_ACPI_STATUS(status);
550}
551
552/*******************************************************************************
553 *
554 * FUNCTION:    acpi_ds_eval_data_object_operands
555 *
556 * PARAMETERS:  walk_state      - Current walk
557 *              op              - A valid data_object Op object
558 *              obj_desc        - data_object
559 *
560 * RETURN:      Status
561 *
562 * DESCRIPTION: Get the operands and complete the following data object types:
563 *              Buffer, Package.
564 *
565 ******************************************************************************/
566
567acpi_status
568acpi_ds_eval_data_object_operands(struct acpi_walk_state *walk_state,
569				  union acpi_parse_object *op,
570				  union acpi_operand_object *obj_desc)
571{
572	acpi_status status;
573	union acpi_operand_object *arg_desc;
574	u32 length;
575
576	ACPI_FUNCTION_TRACE(ds_eval_data_object_operands);
577
578	/* The first operand (for all of these data objects) is the length */
579
580	/*
581	 * Set proper index into operand stack for acpi_ds_obj_stack_push
582	 * invoked inside acpi_ds_create_operand.
583	 */
584	walk_state->operand_index = walk_state->num_operands;
585
586	/* Ignore if child is not valid */
587
588	if (!op->common.value.arg) {
589		ACPI_ERROR((AE_INFO,
590			    "Missing child while evaluating opcode %4.4X, Op %p",
591			    op->common.aml_opcode, op));
592		return_ACPI_STATUS(AE_OK);
593	}
594
595	status = acpi_ds_create_operand(walk_state, op->common.value.arg, 1);
596	if (ACPI_FAILURE(status)) {
597		return_ACPI_STATUS(status);
598	}
599
600	status = acpi_ex_resolve_operands(walk_state->opcode,
601					  &(walk_state->
602					    operands[walk_state->num_operands -
603						     1]), walk_state);
604	if (ACPI_FAILURE(status)) {
605		return_ACPI_STATUS(status);
606	}
607
608	/* Extract length operand */
609
610	arg_desc = walk_state->operands[walk_state->num_operands - 1];
611	length = (u32) arg_desc->integer.value;
612
613	/* Cleanup for length operand */
614
615	status = acpi_ds_obj_stack_pop(1, walk_state);
616	if (ACPI_FAILURE(status)) {
617		return_ACPI_STATUS(status);
618	}
619
620	acpi_ut_remove_reference(arg_desc);
621
622	/*
623	 * Create the actual data object
624	 */
625	switch (op->common.aml_opcode) {
626	case AML_BUFFER_OP:
627
628		status =
629		    acpi_ds_build_internal_buffer_obj(walk_state, op, length,
630						      &obj_desc);
631		break;
632
633	case AML_PACKAGE_OP:
634	case AML_VARIABLE_PACKAGE_OP:
635
636		status =
637		    acpi_ds_build_internal_package_obj(walk_state, op, length,
638						       &obj_desc);
639		break;
640
641	default:
642
643		return_ACPI_STATUS(AE_AML_BAD_OPCODE);
644	}
645
646	if (ACPI_SUCCESS(status)) {
647		/*
648		 * Return the object in the walk_state, unless the parent is a package -
649		 * in this case, the return object will be stored in the parse tree
650		 * for the package.
651		 */
652		if ((!op->common.parent) ||
653		    ((op->common.parent->common.aml_opcode != AML_PACKAGE_OP) &&
654		     (op->common.parent->common.aml_opcode !=
655		      AML_VARIABLE_PACKAGE_OP)
656		     && (op->common.parent->common.aml_opcode !=
657			 AML_NAME_OP))) {
658			walk_state->result_obj = obj_desc;
659		}
660	}
661
662	return_ACPI_STATUS(status);
663}
664
665/*******************************************************************************
666 *
667 * FUNCTION:    acpi_ds_eval_bank_field_operands
668 *
669 * PARAMETERS:  walk_state      - Current walk
670 *              op              - A valid bank_field Op object
671 *
672 * RETURN:      Status
673 *
674 * DESCRIPTION: Get bank_field bank_value
675 *              Called from acpi_ds_exec_end_op during bank_field parse tree walk
676 *
677 ******************************************************************************/
678
679acpi_status
680acpi_ds_eval_bank_field_operands(struct acpi_walk_state *walk_state,
681				 union acpi_parse_object *op)
682{
683	acpi_status status;
684	union acpi_operand_object *obj_desc;
685	union acpi_operand_object *operand_desc;
686	struct acpi_namespace_node *node;
687	union acpi_parse_object *next_op;
688	union acpi_parse_object *arg;
689
690	ACPI_FUNCTION_TRACE_PTR(ds_eval_bank_field_operands, op);
691
692	/*
693	 * This is where we evaluate the bank_value field of the
694	 * bank_field declaration
695	 */
696
697	/* next_op points to the op that holds the Region */
698
699	next_op = op->common.value.arg;
700
701	/* next_op points to the op that holds the Bank Register */
702
703	next_op = next_op->common.next;
704
705	/* next_op points to the op that holds the Bank Value */
706
707	next_op = next_op->common.next;
708
709	/*
710	 * Set proper index into operand stack for acpi_ds_obj_stack_push
711	 * invoked inside acpi_ds_create_operand.
712	 *
713	 * We use walk_state->Operands[0] to store the evaluated bank_value
714	 */
715	walk_state->operand_index = 0;
716
717	status = acpi_ds_create_operand(walk_state, next_op, 0);
718	if (ACPI_FAILURE(status)) {
719		return_ACPI_STATUS(status);
720	}
721
722	status = acpi_ex_resolve_to_value(&walk_state->operands[0], walk_state);
723	if (ACPI_FAILURE(status)) {
724		return_ACPI_STATUS(status);
725	}
726
727	ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS,
728			   acpi_ps_get_opcode_name(op->common.aml_opcode), 1);
729	/*
730	 * Get the bank_value operand and save it
731	 * (at Top of stack)
732	 */
733	operand_desc = walk_state->operands[0];
734
735	/* Arg points to the start Bank Field */
736
737	arg = acpi_ps_get_arg(op, 4);
738	while (arg) {
739
740		/* Ignore OFFSET and ACCESSAS terms here */
741
742		if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) {
743			node = arg->common.node;
744
745			obj_desc = acpi_ns_get_attached_object(node);
746			if (!obj_desc) {
747				return_ACPI_STATUS(AE_NOT_EXIST);
748			}
749
750			obj_desc->bank_field.value =
751			    (u32) operand_desc->integer.value;
752		}
753
754		/* Move to next field in the list */
755
756		arg = arg->common.next;
757	}
758
759	acpi_ut_remove_reference(operand_desc);
760	return_ACPI_STATUS(status);
761}