Loading...
1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2/******************************************************************************
3 *
4 * Module Name: dsfield - Dispatcher field routines
5 *
6 * Copyright (C) 2000 - 2023, Intel Corp.
7 *
8 *****************************************************************************/
9
10#include <acpi/acpi.h>
11#include "accommon.h"
12#include "amlcode.h"
13#include "acdispat.h"
14#include "acinterp.h"
15#include "acnamesp.h"
16#include "acparser.h"
17
18#ifdef ACPI_EXEC_APP
19#include "aecommon.h"
20#endif
21
22#define _COMPONENT ACPI_DISPATCHER
23ACPI_MODULE_NAME("dsfield")
24
25/* Local prototypes */
26#ifdef ACPI_ASL_COMPILER
27#include "acdisasm.h"
28static acpi_status
29acpi_ds_create_external_region(acpi_status lookup_status,
30 union acpi_parse_object *op,
31 char *path,
32 struct acpi_walk_state *walk_state,
33 struct acpi_namespace_node **node);
34#endif
35
36static acpi_status
37acpi_ds_get_field_names(struct acpi_create_field_info *info,
38 struct acpi_walk_state *walk_state,
39 union acpi_parse_object *arg);
40
41#ifdef ACPI_ASL_COMPILER
42/*******************************************************************************
43 *
44 * FUNCTION: acpi_ds_create_external_region (iASL Disassembler only)
45 *
46 * PARAMETERS: lookup_status - Status from ns_lookup operation
47 * op - Op containing the Field definition and args
48 * path - Pathname of the region
49 * ` walk_state - Current method state
50 * node - Where the new region node is returned
51 *
52 * RETURN: Status
53 *
54 * DESCRIPTION: Add region to the external list if NOT_FOUND. Create a new
55 * region node/object.
56 *
57 ******************************************************************************/
58
59static acpi_status
60acpi_ds_create_external_region(acpi_status lookup_status,
61 union acpi_parse_object *op,
62 char *path,
63 struct acpi_walk_state *walk_state,
64 struct acpi_namespace_node **node)
65{
66 acpi_status status;
67 union acpi_operand_object *obj_desc;
68
69 if (lookup_status != AE_NOT_FOUND) {
70 return (lookup_status);
71 }
72
73 /*
74 * Table disassembly:
75 * operation_region not found. Generate an External for it, and
76 * insert the name into the namespace.
77 */
78 acpi_dm_add_op_to_external_list(op, path, ACPI_TYPE_REGION, 0, 0);
79
80 status = acpi_ns_lookup(walk_state->scope_info, path, ACPI_TYPE_REGION,
81 ACPI_IMODE_LOAD_PASS1, ACPI_NS_SEARCH_PARENT,
82 walk_state, node);
83 if (ACPI_FAILURE(status)) {
84 return (status);
85 }
86
87 /* Must create and install a region object for the new node */
88
89 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_REGION);
90 if (!obj_desc) {
91 return (AE_NO_MEMORY);
92 }
93
94 obj_desc->region.node = *node;
95 status = acpi_ns_attach_object(*node, obj_desc, ACPI_TYPE_REGION);
96 return (status);
97}
98#endif
99
100/*******************************************************************************
101 *
102 * FUNCTION: acpi_ds_create_buffer_field
103 *
104 * PARAMETERS: op - Current parse op (create_XXField)
105 * walk_state - Current state
106 *
107 * RETURN: Status
108 *
109 * DESCRIPTION: Execute the create_field operators:
110 * create_bit_field_op,
111 * create_byte_field_op,
112 * create_word_field_op,
113 * create_dword_field_op,
114 * create_qword_field_op,
115 * create_field_op (all of which define a field in a buffer)
116 *
117 ******************************************************************************/
118
119acpi_status
120acpi_ds_create_buffer_field(union acpi_parse_object *op,
121 struct acpi_walk_state *walk_state)
122{
123 union acpi_parse_object *arg;
124 struct acpi_namespace_node *node;
125 acpi_status status;
126 union acpi_operand_object *obj_desc;
127 union acpi_operand_object *second_desc = NULL;
128 u32 flags;
129
130 ACPI_FUNCTION_TRACE(ds_create_buffer_field);
131
132 /*
133 * Get the name_string argument (name of the new buffer_field)
134 */
135 if (op->common.aml_opcode == AML_CREATE_FIELD_OP) {
136
137 /* For create_field, name is the 4th argument */
138
139 arg = acpi_ps_get_arg(op, 3);
140 } else {
141 /* For all other create_XXXField operators, name is the 3rd argument */
142
143 arg = acpi_ps_get_arg(op, 2);
144 }
145
146 if (!arg) {
147 return_ACPI_STATUS(AE_AML_NO_OPERAND);
148 }
149
150 if (walk_state->deferred_node) {
151 node = walk_state->deferred_node;
152 } else {
153 /* Execute flag should always be set when this function is entered */
154
155 if (!(walk_state->parse_flags & ACPI_PARSE_EXECUTE)) {
156 ACPI_ERROR((AE_INFO, "Parse execute mode is not set"));
157 return_ACPI_STATUS(AE_AML_INTERNAL);
158 }
159
160 /* Creating new namespace node, should not already exist */
161
162 flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE |
163 ACPI_NS_ERROR_IF_FOUND;
164
165 /*
166 * Mark node temporary if we are executing a normal control
167 * method. (Don't mark if this is a module-level code method)
168 */
169 if (walk_state->method_node &&
170 !(walk_state->parse_flags & ACPI_PARSE_MODULE_LEVEL)) {
171 flags |= ACPI_NS_TEMPORARY;
172 }
173
174 /* Enter the name_string into the namespace */
175
176 status = acpi_ns_lookup(walk_state->scope_info,
177 arg->common.value.string, ACPI_TYPE_ANY,
178 ACPI_IMODE_LOAD_PASS1, flags,
179 walk_state, &node);
180 if ((walk_state->parse_flags & ACPI_PARSE_DISASSEMBLE)
181 && status == AE_ALREADY_EXISTS) {
182 status = AE_OK;
183 } else if (ACPI_FAILURE(status)) {
184 ACPI_ERROR_NAMESPACE(walk_state->scope_info,
185 arg->common.value.string, status);
186 return_ACPI_STATUS(status);
187 }
188 }
189
190 /*
191 * We could put the returned object (Node) on the object stack for later,
192 * but for now, we will put it in the "op" object that the parser uses,
193 * so we can get it again at the end of this scope.
194 */
195 op->common.node = node;
196
197 /*
198 * If there is no object attached to the node, this node was just created
199 * and we need to create the field object. Otherwise, this was a lookup
200 * of an existing node and we don't want to create the field object again.
201 */
202 obj_desc = acpi_ns_get_attached_object(node);
203 if (obj_desc) {
204 return_ACPI_STATUS(AE_OK);
205 }
206
207 /*
208 * The Field definition is not fully parsed at this time.
209 * (We must save the address of the AML for the buffer and index operands)
210 */
211
212 /* Create the buffer field object */
213
214 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER_FIELD);
215 if (!obj_desc) {
216 status = AE_NO_MEMORY;
217 goto cleanup;
218 }
219
220 /*
221 * Remember location in AML stream of the field unit opcode and operands
222 * -- since the buffer and index operands must be evaluated.
223 */
224 second_desc = obj_desc->common.next_object;
225 second_desc->extra.aml_start = op->named.data;
226 second_desc->extra.aml_length = op->named.length;
227 obj_desc->buffer_field.node = node;
228
229 /* Attach constructed field descriptors to parent node */
230
231 status = acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_BUFFER_FIELD);
232 if (ACPI_FAILURE(status)) {
233 goto cleanup;
234 }
235
236cleanup:
237
238 /* Remove local reference to the object */
239
240 acpi_ut_remove_reference(obj_desc);
241 return_ACPI_STATUS(status);
242}
243
244/*******************************************************************************
245 *
246 * FUNCTION: acpi_ds_get_field_names
247 *
248 * PARAMETERS: info - create_field info structure
249 * walk_state - Current method state
250 * arg - First parser arg for the field name list
251 *
252 * RETURN: Status
253 *
254 * DESCRIPTION: Process all named fields in a field declaration. Names are
255 * entered into the namespace.
256 *
257 ******************************************************************************/
258
259static acpi_status
260acpi_ds_get_field_names(struct acpi_create_field_info *info,
261 struct acpi_walk_state *walk_state,
262 union acpi_parse_object *arg)
263{
264 acpi_status status;
265 u64 position;
266 union acpi_parse_object *child;
267
268#ifdef ACPI_EXEC_APP
269 union acpi_operand_object *result_desc;
270 union acpi_operand_object *obj_desc;
271 char *name_path;
272#endif
273
274 ACPI_FUNCTION_TRACE_PTR(ds_get_field_names, info);
275
276 /* First field starts at bit zero */
277
278 info->field_bit_position = 0;
279
280 /* Process all elements in the field list (of parse nodes) */
281
282 while (arg) {
283 /*
284 * Four types of field elements are handled:
285 * 1) name - Enters a new named field into the namespace
286 * 2) offset - specifies a bit offset
287 * 3) access_as - changes the access mode/attributes
288 * 4) connection - Associate a resource template with the field
289 */
290 switch (arg->common.aml_opcode) {
291 case AML_INT_RESERVEDFIELD_OP:
292
293 position = (u64)info->field_bit_position +
294 (u64)arg->common.value.size;
295
296 if (position > ACPI_UINT32_MAX) {
297 ACPI_ERROR((AE_INFO,
298 "Bit offset within field too large (> 0xFFFFFFFF)"));
299 return_ACPI_STATUS(AE_SUPPORT);
300 }
301
302 info->field_bit_position = (u32) position;
303 break;
304
305 case AML_INT_ACCESSFIELD_OP:
306 case AML_INT_EXTACCESSFIELD_OP:
307 /*
308 * Get new access_type, access_attribute, and access_length fields
309 * -- to be used for all field units that follow, until the
310 * end-of-field or another access_as keyword is encountered.
311 * NOTE. These three bytes are encoded in the integer value
312 * of the parseop for convenience.
313 *
314 * In field_flags, preserve the flag bits other than the
315 * ACCESS_TYPE bits.
316 */
317
318 /* access_type (byte_acc, word_acc, etc.) */
319
320 info->field_flags = (u8)
321 ((info->
322 field_flags & ~(AML_FIELD_ACCESS_TYPE_MASK)) |
323 ((u8)((u32)(arg->common.value.integer & 0x07))));
324
325 /* access_attribute (attrib_quick, attrib_byte, etc.) */
326
327 info->attribute = (u8)
328 ((arg->common.value.integer >> 8) & 0xFF);
329
330 /* access_length (for serial/buffer protocols) */
331
332 info->access_length = (u8)
333 ((arg->common.value.integer >> 16) & 0xFF);
334 break;
335
336 case AML_INT_CONNECTION_OP:
337 /*
338 * Clear any previous connection. New connection is used for all
339 * fields that follow, similar to access_as
340 */
341 info->resource_buffer = NULL;
342 info->connection_node = NULL;
343 info->pin_number_index = 0;
344
345 /*
346 * A Connection() is either an actual resource descriptor (buffer)
347 * or a named reference to a resource template
348 */
349 child = arg->common.value.arg;
350 if (child->common.aml_opcode == AML_INT_BYTELIST_OP) {
351 info->resource_buffer = child->named.data;
352 info->resource_length =
353 (u16)child->named.value.integer;
354 } else {
355 /* Lookup the Connection() namepath, it should already exist */
356
357 status = acpi_ns_lookup(walk_state->scope_info,
358 child->common.value.
359 name, ACPI_TYPE_ANY,
360 ACPI_IMODE_EXECUTE,
361 ACPI_NS_DONT_OPEN_SCOPE,
362 walk_state,
363 &info->connection_node);
364 if (ACPI_FAILURE(status)) {
365 ACPI_ERROR_NAMESPACE(walk_state->
366 scope_info,
367 child->common.
368 value.name,
369 status);
370 return_ACPI_STATUS(status);
371 }
372 }
373 break;
374
375 case AML_INT_NAMEDFIELD_OP:
376
377 /* Lookup the name, it should already exist */
378
379 status = acpi_ns_lookup(walk_state->scope_info,
380 (char *)&arg->named.name,
381 info->field_type,
382 ACPI_IMODE_EXECUTE,
383 ACPI_NS_DONT_OPEN_SCOPE,
384 walk_state, &info->field_node);
385 if (ACPI_FAILURE(status)) {
386 ACPI_ERROR_NAMESPACE(walk_state->scope_info,
387 (char *)&arg->named.name,
388 status);
389 return_ACPI_STATUS(status);
390 } else {
391 arg->common.node = info->field_node;
392 info->field_bit_length = arg->common.value.size;
393
394 /*
395 * If there is no object attached to the node, this node was
396 * just created and we need to create the field object.
397 * Otherwise, this was a lookup of an existing node and we
398 * don't want to create the field object again.
399 */
400 if (!acpi_ns_get_attached_object
401 (info->field_node)) {
402 status = acpi_ex_prep_field_value(info);
403 if (ACPI_FAILURE(status)) {
404 return_ACPI_STATUS(status);
405 }
406#ifdef ACPI_EXEC_APP
407 name_path =
408 acpi_ns_get_external_pathname(info->
409 field_node);
410 if (ACPI_SUCCESS
411 (ae_lookup_init_file_entry
412 (name_path, &obj_desc))) {
413 acpi_ex_write_data_to_field
414 (obj_desc,
415 acpi_ns_get_attached_object
416 (info->field_node),
417 &result_desc);
418 acpi_ut_remove_reference
419 (obj_desc);
420 }
421 ACPI_FREE(name_path);
422#endif
423 }
424 }
425
426 /* Keep track of bit position for the next field */
427
428 position = (u64)info->field_bit_position +
429 (u64)arg->common.value.size;
430
431 if (position > ACPI_UINT32_MAX) {
432 ACPI_ERROR((AE_INFO,
433 "Field [%4.4s] bit offset too large (> 0xFFFFFFFF)",
434 ACPI_CAST_PTR(char,
435 &info->field_node->
436 name)));
437 return_ACPI_STATUS(AE_SUPPORT);
438 }
439
440 info->field_bit_position += info->field_bit_length;
441 info->pin_number_index++; /* Index relative to previous Connection() */
442 break;
443
444 default:
445
446 ACPI_ERROR((AE_INFO,
447 "Invalid opcode in field list: 0x%X",
448 arg->common.aml_opcode));
449 return_ACPI_STATUS(AE_AML_BAD_OPCODE);
450 }
451
452 arg = arg->common.next;
453 }
454
455 return_ACPI_STATUS(AE_OK);
456}
457
458/*******************************************************************************
459 *
460 * FUNCTION: acpi_ds_create_field
461 *
462 * PARAMETERS: op - Op containing the Field definition and args
463 * region_node - Object for the containing Operation Region
464 * ` walk_state - Current method state
465 *
466 * RETURN: Status
467 *
468 * DESCRIPTION: Create a new field in the specified operation region
469 *
470 ******************************************************************************/
471
472acpi_status
473acpi_ds_create_field(union acpi_parse_object *op,
474 struct acpi_namespace_node *region_node,
475 struct acpi_walk_state *walk_state)
476{
477 acpi_status status;
478 union acpi_parse_object *arg;
479 struct acpi_create_field_info info;
480
481 ACPI_FUNCTION_TRACE_PTR(ds_create_field, op);
482
483 /* First arg is the name of the parent op_region (must already exist) */
484
485 arg = op->common.value.arg;
486
487 if (!region_node) {
488 status =
489 acpi_ns_lookup(walk_state->scope_info,
490 arg->common.value.name, ACPI_TYPE_REGION,
491 ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
492 walk_state, ®ion_node);
493#ifdef ACPI_ASL_COMPILER
494 status = acpi_ds_create_external_region(status, arg,
495 arg->common.value.name,
496 walk_state,
497 ®ion_node);
498#endif
499 if (ACPI_FAILURE(status)) {
500 ACPI_ERROR_NAMESPACE(walk_state->scope_info,
501 arg->common.value.name, status);
502 return_ACPI_STATUS(status);
503 }
504 }
505
506 memset(&info, 0, sizeof(struct acpi_create_field_info));
507
508 /* Second arg is the field flags */
509
510 arg = arg->common.next;
511 info.field_flags = (u8) arg->common.value.integer;
512 info.attribute = 0;
513
514 /* Each remaining arg is a Named Field */
515
516 info.field_type = ACPI_TYPE_LOCAL_REGION_FIELD;
517 info.region_node = region_node;
518
519 status = acpi_ds_get_field_names(&info, walk_state, arg->common.next);
520 if (ACPI_FAILURE(status)) {
521 return_ACPI_STATUS(status);
522 }
523
524 if (info.region_node->object->region.space_id ==
525 ACPI_ADR_SPACE_PLATFORM_COMM) {
526 region_node->object->field.internal_pcc_buffer =
527 ACPI_ALLOCATE_ZEROED(info.region_node->object->region.
528 length);
529 if (!region_node->object->field.internal_pcc_buffer) {
530 return_ACPI_STATUS(AE_NO_MEMORY);
531 }
532 }
533
534 return_ACPI_STATUS(status);
535}
536
537/*******************************************************************************
538 *
539 * FUNCTION: acpi_ds_init_field_objects
540 *
541 * PARAMETERS: op - Op containing the Field definition and args
542 * ` walk_state - Current method state
543 *
544 * RETURN: Status
545 *
546 * DESCRIPTION: For each "Field Unit" name in the argument list that is
547 * part of the field declaration, enter the name into the
548 * namespace.
549 *
550 ******************************************************************************/
551
552acpi_status
553acpi_ds_init_field_objects(union acpi_parse_object *op,
554 struct acpi_walk_state *walk_state)
555{
556 acpi_status status;
557 union acpi_parse_object *arg = NULL;
558 struct acpi_namespace_node *node;
559 u8 type = 0;
560 u32 flags;
561
562 ACPI_FUNCTION_TRACE_PTR(ds_init_field_objects, op);
563
564 /* Execute flag should always be set when this function is entered */
565
566 if (!(walk_state->parse_flags & ACPI_PARSE_EXECUTE)) {
567 if (walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP) {
568
569 /* bank_field Op is deferred, just return OK */
570
571 return_ACPI_STATUS(AE_OK);
572 }
573
574 ACPI_ERROR((AE_INFO, "Parse deferred mode is not set"));
575 return_ACPI_STATUS(AE_AML_INTERNAL);
576 }
577
578 /*
579 * Get the field_list argument for this opcode. This is the start of the
580 * list of field elements.
581 */
582 switch (walk_state->opcode) {
583 case AML_FIELD_OP:
584
585 arg = acpi_ps_get_arg(op, 2);
586 type = ACPI_TYPE_LOCAL_REGION_FIELD;
587 break;
588
589 case AML_BANK_FIELD_OP:
590
591 arg = acpi_ps_get_arg(op, 4);
592 type = ACPI_TYPE_LOCAL_BANK_FIELD;
593 break;
594
595 case AML_INDEX_FIELD_OP:
596
597 arg = acpi_ps_get_arg(op, 3);
598 type = ACPI_TYPE_LOCAL_INDEX_FIELD;
599 break;
600
601 default:
602
603 return_ACPI_STATUS(AE_BAD_PARAMETER);
604 }
605
606 /* Creating new namespace node(s), should not already exist */
607
608 flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE |
609 ACPI_NS_ERROR_IF_FOUND;
610
611 /*
612 * Mark node(s) temporary if we are executing a normal control
613 * method. (Don't mark if this is a module-level code method)
614 */
615 if (walk_state->method_node &&
616 !(walk_state->parse_flags & ACPI_PARSE_MODULE_LEVEL)) {
617 flags |= ACPI_NS_TEMPORARY;
618 }
619#ifdef ACPI_EXEC_APP
620 flags |= ACPI_NS_OVERRIDE_IF_FOUND;
621#endif
622 /*
623 * Walk the list of entries in the field_list
624 * Note: field_list can be of zero length. In this case, Arg will be NULL.
625 */
626 while (arg) {
627 /*
628 * Ignore OFFSET/ACCESSAS/CONNECTION terms here; we are only interested
629 * in the field names in order to enter them into the namespace.
630 */
631 if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) {
632 status = acpi_ns_lookup(walk_state->scope_info,
633 (char *)&arg->named.name, type,
634 ACPI_IMODE_LOAD_PASS1, flags,
635 walk_state, &node);
636 if (ACPI_FAILURE(status)) {
637 ACPI_ERROR_NAMESPACE(walk_state->scope_info,
638 (char *)&arg->named.name,
639 status);
640 if (status != AE_ALREADY_EXISTS) {
641 return_ACPI_STATUS(status);
642 }
643
644 /* Name already exists, just ignore this error */
645 }
646
647 arg->common.node = node;
648 }
649
650 /* Get the next field element in the list */
651
652 arg = arg->common.next;
653 }
654
655 return_ACPI_STATUS(AE_OK);
656}
657
658/*******************************************************************************
659 *
660 * FUNCTION: acpi_ds_create_bank_field
661 *
662 * PARAMETERS: op - Op containing the Field definition and args
663 * region_node - Object for the containing Operation Region
664 * walk_state - Current method state
665 *
666 * RETURN: Status
667 *
668 * DESCRIPTION: Create a new bank field in the specified operation region
669 *
670 ******************************************************************************/
671
672acpi_status
673acpi_ds_create_bank_field(union acpi_parse_object *op,
674 struct acpi_namespace_node *region_node,
675 struct acpi_walk_state *walk_state)
676{
677 acpi_status status;
678 union acpi_parse_object *arg;
679 struct acpi_create_field_info info;
680
681 ACPI_FUNCTION_TRACE_PTR(ds_create_bank_field, op);
682
683 /* First arg is the name of the parent op_region (must already exist) */
684
685 arg = op->common.value.arg;
686 if (!region_node) {
687 status =
688 acpi_ns_lookup(walk_state->scope_info,
689 arg->common.value.name, ACPI_TYPE_REGION,
690 ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
691 walk_state, ®ion_node);
692#ifdef ACPI_ASL_COMPILER
693 status = acpi_ds_create_external_region(status, arg,
694 arg->common.value.name,
695 walk_state,
696 ®ion_node);
697#endif
698 if (ACPI_FAILURE(status)) {
699 ACPI_ERROR_NAMESPACE(walk_state->scope_info,
700 arg->common.value.name, status);
701 return_ACPI_STATUS(status);
702 }
703 }
704
705 /* Second arg is the Bank Register (Field) (must already exist) */
706
707 arg = arg->common.next;
708 status =
709 acpi_ns_lookup(walk_state->scope_info, arg->common.value.string,
710 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
711 ACPI_NS_SEARCH_PARENT, walk_state,
712 &info.register_node);
713 if (ACPI_FAILURE(status)) {
714 ACPI_ERROR_NAMESPACE(walk_state->scope_info,
715 arg->common.value.string, status);
716 return_ACPI_STATUS(status);
717 }
718
719 /*
720 * Third arg is the bank_value
721 * This arg is a term_arg, not a constant
722 * It will be evaluated later, by acpi_ds_eval_bank_field_operands
723 */
724 arg = arg->common.next;
725
726 /* Fourth arg is the field flags */
727
728 arg = arg->common.next;
729 info.field_flags = (u8) arg->common.value.integer;
730
731 /* Each remaining arg is a Named Field */
732
733 info.field_type = ACPI_TYPE_LOCAL_BANK_FIELD;
734 info.region_node = region_node;
735
736 /*
737 * Use Info.data_register_node to store bank_field Op
738 * It's safe because data_register_node will never be used when create
739 * bank field \we store aml_start and aml_length in the bank_field Op for
740 * late evaluation. Used in acpi_ex_prep_field_value(Info)
741 *
742 * TBD: Or, should we add a field in struct acpi_create_field_info, like
743 * "void *ParentOp"?
744 */
745 info.data_register_node = (struct acpi_namespace_node *)op;
746
747 status = acpi_ds_get_field_names(&info, walk_state, arg->common.next);
748 return_ACPI_STATUS(status);
749}
750
751/*******************************************************************************
752 *
753 * FUNCTION: acpi_ds_create_index_field
754 *
755 * PARAMETERS: op - Op containing the Field definition and args
756 * region_node - Object for the containing Operation Region
757 * ` walk_state - Current method state
758 *
759 * RETURN: Status
760 *
761 * DESCRIPTION: Create a new index field in the specified operation region
762 *
763 ******************************************************************************/
764
765acpi_status
766acpi_ds_create_index_field(union acpi_parse_object *op,
767 struct acpi_namespace_node *region_node,
768 struct acpi_walk_state *walk_state)
769{
770 acpi_status status;
771 union acpi_parse_object *arg;
772 struct acpi_create_field_info info;
773
774 ACPI_FUNCTION_TRACE_PTR(ds_create_index_field, op);
775
776 /* First arg is the name of the Index register (must already exist) */
777
778 arg = op->common.value.arg;
779 status =
780 acpi_ns_lookup(walk_state->scope_info, arg->common.value.string,
781 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
782 ACPI_NS_SEARCH_PARENT, walk_state,
783 &info.register_node);
784 if (ACPI_FAILURE(status)) {
785 ACPI_ERROR_NAMESPACE(walk_state->scope_info,
786 arg->common.value.string, status);
787 return_ACPI_STATUS(status);
788 }
789
790 /* Second arg is the data register (must already exist) */
791
792 arg = arg->common.next;
793 status =
794 acpi_ns_lookup(walk_state->scope_info, arg->common.value.string,
795 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
796 ACPI_NS_SEARCH_PARENT, walk_state,
797 &info.data_register_node);
798 if (ACPI_FAILURE(status)) {
799 ACPI_ERROR_NAMESPACE(walk_state->scope_info,
800 arg->common.value.string, status);
801 return_ACPI_STATUS(status);
802 }
803
804 /* Next arg is the field flags */
805
806 arg = arg->common.next;
807 info.field_flags = (u8) arg->common.value.integer;
808
809 /* Each remaining arg is a Named Field */
810
811 info.field_type = ACPI_TYPE_LOCAL_INDEX_FIELD;
812 info.region_node = region_node;
813
814 status = acpi_ds_get_field_names(&info, walk_state, arg->common.next);
815 return_ACPI_STATUS(status);
816}
1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2/******************************************************************************
3 *
4 * Module Name: dsfield - Dispatcher field routines
5 *
6 * Copyright (C) 2000 - 2018, Intel Corp.
7 *
8 *****************************************************************************/
9
10#include <acpi/acpi.h>
11#include "accommon.h"
12#include "amlcode.h"
13#include "acdispat.h"
14#include "acinterp.h"
15#include "acnamesp.h"
16#include "acparser.h"
17
18#define _COMPONENT ACPI_DISPATCHER
19ACPI_MODULE_NAME("dsfield")
20
21/* Local prototypes */
22#ifdef ACPI_ASL_COMPILER
23#include "acdisasm.h"
24static acpi_status
25acpi_ds_create_external_region(acpi_status lookup_status,
26 union acpi_parse_object *op,
27 char *path,
28 struct acpi_walk_state *walk_state,
29 struct acpi_namespace_node **node);
30#endif
31
32static acpi_status
33acpi_ds_get_field_names(struct acpi_create_field_info *info,
34 struct acpi_walk_state *walk_state,
35 union acpi_parse_object *arg);
36
37#ifdef ACPI_ASL_COMPILER
38/*******************************************************************************
39 *
40 * FUNCTION: acpi_ds_create_external_region (iASL Disassembler only)
41 *
42 * PARAMETERS: lookup_status - Status from ns_lookup operation
43 * op - Op containing the Field definition and args
44 * path - Pathname of the region
45 * ` walk_state - Current method state
46 * node - Where the new region node is returned
47 *
48 * RETURN: Status
49 *
50 * DESCRIPTION: Add region to the external list if NOT_FOUND. Create a new
51 * region node/object.
52 *
53 ******************************************************************************/
54
55static acpi_status
56acpi_ds_create_external_region(acpi_status lookup_status,
57 union acpi_parse_object *op,
58 char *path,
59 struct acpi_walk_state *walk_state,
60 struct acpi_namespace_node **node)
61{
62 acpi_status status;
63 union acpi_operand_object *obj_desc;
64
65 if (lookup_status != AE_NOT_FOUND) {
66 return (lookup_status);
67 }
68
69 /*
70 * Table disassembly:
71 * operation_region not found. Generate an External for it, and
72 * insert the name into the namespace.
73 */
74 acpi_dm_add_op_to_external_list(op, path, ACPI_TYPE_REGION, 0, 0);
75
76 status = acpi_ns_lookup(walk_state->scope_info, path, ACPI_TYPE_REGION,
77 ACPI_IMODE_LOAD_PASS1, ACPI_NS_SEARCH_PARENT,
78 walk_state, node);
79 if (ACPI_FAILURE(status)) {
80 return (status);
81 }
82
83 /* Must create and install a region object for the new node */
84
85 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_REGION);
86 if (!obj_desc) {
87 return (AE_NO_MEMORY);
88 }
89
90 obj_desc->region.node = *node;
91 status = acpi_ns_attach_object(*node, obj_desc, ACPI_TYPE_REGION);
92 return (status);
93}
94#endif
95
96/*******************************************************************************
97 *
98 * FUNCTION: acpi_ds_create_buffer_field
99 *
100 * PARAMETERS: op - Current parse op (create_XXField)
101 * walk_state - Current state
102 *
103 * RETURN: Status
104 *
105 * DESCRIPTION: Execute the create_field operators:
106 * create_bit_field_op,
107 * create_byte_field_op,
108 * create_word_field_op,
109 * create_dword_field_op,
110 * create_qword_field_op,
111 * create_field_op (all of which define a field in a buffer)
112 *
113 ******************************************************************************/
114
115acpi_status
116acpi_ds_create_buffer_field(union acpi_parse_object *op,
117 struct acpi_walk_state *walk_state)
118{
119 union acpi_parse_object *arg;
120 struct acpi_namespace_node *node;
121 acpi_status status;
122 union acpi_operand_object *obj_desc;
123 union acpi_operand_object *second_desc = NULL;
124 u32 flags;
125
126 ACPI_FUNCTION_TRACE(ds_create_buffer_field);
127
128 /*
129 * Get the name_string argument (name of the new buffer_field)
130 */
131 if (op->common.aml_opcode == AML_CREATE_FIELD_OP) {
132
133 /* For create_field, name is the 4th argument */
134
135 arg = acpi_ps_get_arg(op, 3);
136 } else {
137 /* For all other create_XXXField operators, name is the 3rd argument */
138
139 arg = acpi_ps_get_arg(op, 2);
140 }
141
142 if (!arg) {
143 return_ACPI_STATUS(AE_AML_NO_OPERAND);
144 }
145
146 if (walk_state->deferred_node) {
147 node = walk_state->deferred_node;
148 status = AE_OK;
149 } else {
150 /* Execute flag should always be set when this function is entered */
151
152 if (!(walk_state->parse_flags & ACPI_PARSE_EXECUTE)) {
153 ACPI_ERROR((AE_INFO, "Parse execute mode is not set"));
154 return_ACPI_STATUS(AE_AML_INTERNAL);
155 }
156
157 /* Creating new namespace node, should not already exist */
158
159 flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE |
160 ACPI_NS_ERROR_IF_FOUND;
161
162 /*
163 * Mark node temporary if we are executing a normal control
164 * method. (Don't mark if this is a module-level code method)
165 */
166 if (walk_state->method_node &&
167 !(walk_state->parse_flags & ACPI_PARSE_MODULE_LEVEL)) {
168 flags |= ACPI_NS_TEMPORARY;
169 }
170
171 /* Enter the name_string into the namespace */
172
173 status = acpi_ns_lookup(walk_state->scope_info,
174 arg->common.value.string, ACPI_TYPE_ANY,
175 ACPI_IMODE_LOAD_PASS1, flags,
176 walk_state, &node);
177 if (ACPI_FAILURE(status)) {
178 ACPI_ERROR_NAMESPACE(walk_state->scope_info,
179 arg->common.value.string, status);
180 return_ACPI_STATUS(status);
181 }
182 }
183
184 /*
185 * We could put the returned object (Node) on the object stack for later,
186 * but for now, we will put it in the "op" object that the parser uses,
187 * so we can get it again at the end of this scope.
188 */
189 op->common.node = node;
190
191 /*
192 * If there is no object attached to the node, this node was just created
193 * and we need to create the field object. Otherwise, this was a lookup
194 * of an existing node and we don't want to create the field object again.
195 */
196 obj_desc = acpi_ns_get_attached_object(node);
197 if (obj_desc) {
198 return_ACPI_STATUS(AE_OK);
199 }
200
201 /*
202 * The Field definition is not fully parsed at this time.
203 * (We must save the address of the AML for the buffer and index operands)
204 */
205
206 /* Create the buffer field object */
207
208 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER_FIELD);
209 if (!obj_desc) {
210 status = AE_NO_MEMORY;
211 goto cleanup;
212 }
213
214 /*
215 * Remember location in AML stream of the field unit opcode and operands
216 * -- since the buffer and index operands must be evaluated.
217 */
218 second_desc = obj_desc->common.next_object;
219 second_desc->extra.aml_start = op->named.data;
220 second_desc->extra.aml_length = op->named.length;
221 obj_desc->buffer_field.node = node;
222
223 /* Attach constructed field descriptors to parent node */
224
225 status = acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_BUFFER_FIELD);
226 if (ACPI_FAILURE(status)) {
227 goto cleanup;
228 }
229
230cleanup:
231
232 /* Remove local reference to the object */
233
234 acpi_ut_remove_reference(obj_desc);
235 return_ACPI_STATUS(status);
236}
237
238/*******************************************************************************
239 *
240 * FUNCTION: acpi_ds_get_field_names
241 *
242 * PARAMETERS: info - create_field info structure
243 * ` walk_state - Current method state
244 * arg - First parser arg for the field name list
245 *
246 * RETURN: Status
247 *
248 * DESCRIPTION: Process all named fields in a field declaration. Names are
249 * entered into the namespace.
250 *
251 ******************************************************************************/
252
253static acpi_status
254acpi_ds_get_field_names(struct acpi_create_field_info *info,
255 struct acpi_walk_state *walk_state,
256 union acpi_parse_object *arg)
257{
258 acpi_status status;
259 u64 position;
260 union acpi_parse_object *child;
261
262 ACPI_FUNCTION_TRACE_PTR(ds_get_field_names, info);
263
264 /* First field starts at bit zero */
265
266 info->field_bit_position = 0;
267
268 /* Process all elements in the field list (of parse nodes) */
269
270 while (arg) {
271 /*
272 * Four types of field elements are handled:
273 * 1) name - Enters a new named field into the namespace
274 * 2) offset - specifies a bit offset
275 * 3) access_as - changes the access mode/attributes
276 * 4) connection - Associate a resource template with the field
277 */
278 switch (arg->common.aml_opcode) {
279 case AML_INT_RESERVEDFIELD_OP:
280
281 position = (u64)info->field_bit_position +
282 (u64)arg->common.value.size;
283
284 if (position > ACPI_UINT32_MAX) {
285 ACPI_ERROR((AE_INFO,
286 "Bit offset within field too large (> 0xFFFFFFFF)"));
287 return_ACPI_STATUS(AE_SUPPORT);
288 }
289
290 info->field_bit_position = (u32) position;
291 break;
292
293 case AML_INT_ACCESSFIELD_OP:
294 case AML_INT_EXTACCESSFIELD_OP:
295 /*
296 * Get new access_type, access_attribute, and access_length fields
297 * -- to be used for all field units that follow, until the
298 * end-of-field or another access_as keyword is encountered.
299 * NOTE. These three bytes are encoded in the integer value
300 * of the parseop for convenience.
301 *
302 * In field_flags, preserve the flag bits other than the
303 * ACCESS_TYPE bits.
304 */
305
306 /* access_type (byte_acc, word_acc, etc.) */
307
308 info->field_flags = (u8)
309 ((info->
310 field_flags & ~(AML_FIELD_ACCESS_TYPE_MASK)) |
311 ((u8)((u32)(arg->common.value.integer & 0x07))));
312
313 /* access_attribute (attrib_quick, attrib_byte, etc.) */
314
315 info->attribute = (u8)
316 ((arg->common.value.integer >> 8) & 0xFF);
317
318 /* access_length (for serial/buffer protocols) */
319
320 info->access_length = (u8)
321 ((arg->common.value.integer >> 16) & 0xFF);
322 break;
323
324 case AML_INT_CONNECTION_OP:
325 /*
326 * Clear any previous connection. New connection is used for all
327 * fields that follow, similar to access_as
328 */
329 info->resource_buffer = NULL;
330 info->connection_node = NULL;
331 info->pin_number_index = 0;
332
333 /*
334 * A Connection() is either an actual resource descriptor (buffer)
335 * or a named reference to a resource template
336 */
337 child = arg->common.value.arg;
338 if (child->common.aml_opcode == AML_INT_BYTELIST_OP) {
339 info->resource_buffer = child->named.data;
340 info->resource_length =
341 (u16)child->named.value.integer;
342 } else {
343 /* Lookup the Connection() namepath, it should already exist */
344
345 status = acpi_ns_lookup(walk_state->scope_info,
346 child->common.value.
347 name, ACPI_TYPE_ANY,
348 ACPI_IMODE_EXECUTE,
349 ACPI_NS_DONT_OPEN_SCOPE,
350 walk_state,
351 &info->connection_node);
352 if (ACPI_FAILURE(status)) {
353 ACPI_ERROR_NAMESPACE(walk_state->
354 scope_info,
355 child->common.
356 value.name,
357 status);
358 return_ACPI_STATUS(status);
359 }
360 }
361 break;
362
363 case AML_INT_NAMEDFIELD_OP:
364
365 /* Lookup the name, it should already exist */
366
367 status = acpi_ns_lookup(walk_state->scope_info,
368 (char *)&arg->named.name,
369 info->field_type,
370 ACPI_IMODE_EXECUTE,
371 ACPI_NS_DONT_OPEN_SCOPE,
372 walk_state, &info->field_node);
373 if (ACPI_FAILURE(status)) {
374 ACPI_ERROR_NAMESPACE(walk_state->scope_info,
375 (char *)&arg->named.name,
376 status);
377 return_ACPI_STATUS(status);
378 } else {
379 arg->common.node = info->field_node;
380 info->field_bit_length = arg->common.value.size;
381
382 /*
383 * If there is no object attached to the node, this node was
384 * just created and we need to create the field object.
385 * Otherwise, this was a lookup of an existing node and we
386 * don't want to create the field object again.
387 */
388 if (!acpi_ns_get_attached_object
389 (info->field_node)) {
390 status = acpi_ex_prep_field_value(info);
391 if (ACPI_FAILURE(status)) {
392 return_ACPI_STATUS(status);
393 }
394 }
395 }
396
397 /* Keep track of bit position for the next field */
398
399 position = (u64)info->field_bit_position +
400 (u64)arg->common.value.size;
401
402 if (position > ACPI_UINT32_MAX) {
403 ACPI_ERROR((AE_INFO,
404 "Field [%4.4s] bit offset too large (> 0xFFFFFFFF)",
405 ACPI_CAST_PTR(char,
406 &info->field_node->
407 name)));
408 return_ACPI_STATUS(AE_SUPPORT);
409 }
410
411 info->field_bit_position += info->field_bit_length;
412 info->pin_number_index++; /* Index relative to previous Connection() */
413 break;
414
415 default:
416
417 ACPI_ERROR((AE_INFO,
418 "Invalid opcode in field list: 0x%X",
419 arg->common.aml_opcode));
420 return_ACPI_STATUS(AE_AML_BAD_OPCODE);
421 }
422
423 arg = arg->common.next;
424 }
425
426 return_ACPI_STATUS(AE_OK);
427}
428
429/*******************************************************************************
430 *
431 * FUNCTION: acpi_ds_create_field
432 *
433 * PARAMETERS: op - Op containing the Field definition and args
434 * region_node - Object for the containing Operation Region
435 * ` walk_state - Current method state
436 *
437 * RETURN: Status
438 *
439 * DESCRIPTION: Create a new field in the specified operation region
440 *
441 ******************************************************************************/
442
443acpi_status
444acpi_ds_create_field(union acpi_parse_object *op,
445 struct acpi_namespace_node *region_node,
446 struct acpi_walk_state *walk_state)
447{
448 acpi_status status;
449 union acpi_parse_object *arg;
450 struct acpi_create_field_info info;
451
452 ACPI_FUNCTION_TRACE_PTR(ds_create_field, op);
453
454 /* First arg is the name of the parent op_region (must already exist) */
455
456 arg = op->common.value.arg;
457
458 if (!region_node) {
459 status =
460 acpi_ns_lookup(walk_state->scope_info,
461 arg->common.value.name, ACPI_TYPE_REGION,
462 ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
463 walk_state, ®ion_node);
464#ifdef ACPI_ASL_COMPILER
465 status = acpi_ds_create_external_region(status, arg,
466 arg->common.value.name,
467 walk_state,
468 ®ion_node);
469#endif
470 if (ACPI_FAILURE(status)) {
471 ACPI_ERROR_NAMESPACE(walk_state->scope_info,
472 arg->common.value.name, status);
473 return_ACPI_STATUS(status);
474 }
475 }
476
477 memset(&info, 0, sizeof(struct acpi_create_field_info));
478
479 /* Second arg is the field flags */
480
481 arg = arg->common.next;
482 info.field_flags = (u8) arg->common.value.integer;
483 info.attribute = 0;
484
485 /* Each remaining arg is a Named Field */
486
487 info.field_type = ACPI_TYPE_LOCAL_REGION_FIELD;
488 info.region_node = region_node;
489
490 status = acpi_ds_get_field_names(&info, walk_state, arg->common.next);
491 return_ACPI_STATUS(status);
492}
493
494/*******************************************************************************
495 *
496 * FUNCTION: acpi_ds_init_field_objects
497 *
498 * PARAMETERS: op - Op containing the Field definition and args
499 * ` walk_state - Current method state
500 *
501 * RETURN: Status
502 *
503 * DESCRIPTION: For each "Field Unit" name in the argument list that is
504 * part of the field declaration, enter the name into the
505 * namespace.
506 *
507 ******************************************************************************/
508
509acpi_status
510acpi_ds_init_field_objects(union acpi_parse_object *op,
511 struct acpi_walk_state *walk_state)
512{
513 acpi_status status;
514 union acpi_parse_object *arg = NULL;
515 struct acpi_namespace_node *node;
516 u8 type = 0;
517 u32 flags;
518
519 ACPI_FUNCTION_TRACE_PTR(ds_init_field_objects, op);
520
521 /* Execute flag should always be set when this function is entered */
522
523 if (!(walk_state->parse_flags & ACPI_PARSE_EXECUTE)) {
524 if (walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP) {
525
526 /* bank_field Op is deferred, just return OK */
527
528 return_ACPI_STATUS(AE_OK);
529 }
530
531 ACPI_ERROR((AE_INFO, "Parse deferred mode is not set"));
532 return_ACPI_STATUS(AE_AML_INTERNAL);
533 }
534
535 /*
536 * Get the field_list argument for this opcode. This is the start of the
537 * list of field elements.
538 */
539 switch (walk_state->opcode) {
540 case AML_FIELD_OP:
541
542 arg = acpi_ps_get_arg(op, 2);
543 type = ACPI_TYPE_LOCAL_REGION_FIELD;
544 break;
545
546 case AML_BANK_FIELD_OP:
547
548 arg = acpi_ps_get_arg(op, 4);
549 type = ACPI_TYPE_LOCAL_BANK_FIELD;
550 break;
551
552 case AML_INDEX_FIELD_OP:
553
554 arg = acpi_ps_get_arg(op, 3);
555 type = ACPI_TYPE_LOCAL_INDEX_FIELD;
556 break;
557
558 default:
559
560 return_ACPI_STATUS(AE_BAD_PARAMETER);
561 }
562
563 /* Creating new namespace node(s), should not already exist */
564
565 flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE |
566 ACPI_NS_ERROR_IF_FOUND;
567
568 /*
569 * Mark node(s) temporary if we are executing a normal control
570 * method. (Don't mark if this is a module-level code method)
571 */
572 if (walk_state->method_node &&
573 !(walk_state->parse_flags & ACPI_PARSE_MODULE_LEVEL)) {
574 flags |= ACPI_NS_TEMPORARY;
575 }
576
577 /*
578 * Walk the list of entries in the field_list
579 * Note: field_list can be of zero length. In this case, Arg will be NULL.
580 */
581 while (arg) {
582 /*
583 * Ignore OFFSET/ACCESSAS/CONNECTION terms here; we are only interested
584 * in the field names in order to enter them into the namespace.
585 */
586 if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) {
587 status = acpi_ns_lookup(walk_state->scope_info,
588 (char *)&arg->named.name, type,
589 ACPI_IMODE_LOAD_PASS1, flags,
590 walk_state, &node);
591 if (ACPI_FAILURE(status)) {
592 ACPI_ERROR_NAMESPACE(walk_state->scope_info,
593 (char *)&arg->named.name,
594 status);
595 if (status != AE_ALREADY_EXISTS) {
596 return_ACPI_STATUS(status);
597 }
598
599 /* Name already exists, just ignore this error */
600
601 status = AE_OK;
602 }
603
604 arg->common.node = node;
605 }
606
607 /* Get the next field element in the list */
608
609 arg = arg->common.next;
610 }
611
612 return_ACPI_STATUS(AE_OK);
613}
614
615/*******************************************************************************
616 *
617 * FUNCTION: acpi_ds_create_bank_field
618 *
619 * PARAMETERS: op - Op containing the Field definition and args
620 * region_node - Object for the containing Operation Region
621 * walk_state - Current method state
622 *
623 * RETURN: Status
624 *
625 * DESCRIPTION: Create a new bank field in the specified operation region
626 *
627 ******************************************************************************/
628
629acpi_status
630acpi_ds_create_bank_field(union acpi_parse_object *op,
631 struct acpi_namespace_node *region_node,
632 struct acpi_walk_state *walk_state)
633{
634 acpi_status status;
635 union acpi_parse_object *arg;
636 struct acpi_create_field_info info;
637
638 ACPI_FUNCTION_TRACE_PTR(ds_create_bank_field, op);
639
640 /* First arg is the name of the parent op_region (must already exist) */
641
642 arg = op->common.value.arg;
643 if (!region_node) {
644 status =
645 acpi_ns_lookup(walk_state->scope_info,
646 arg->common.value.name, ACPI_TYPE_REGION,
647 ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
648 walk_state, ®ion_node);
649#ifdef ACPI_ASL_COMPILER
650 status = acpi_ds_create_external_region(status, arg,
651 arg->common.value.name,
652 walk_state,
653 ®ion_node);
654#endif
655 if (ACPI_FAILURE(status)) {
656 ACPI_ERROR_NAMESPACE(walk_state->scope_info,
657 arg->common.value.name, status);
658 return_ACPI_STATUS(status);
659 }
660 }
661
662 /* Second arg is the Bank Register (Field) (must already exist) */
663
664 arg = arg->common.next;
665 status =
666 acpi_ns_lookup(walk_state->scope_info, arg->common.value.string,
667 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
668 ACPI_NS_SEARCH_PARENT, walk_state,
669 &info.register_node);
670 if (ACPI_FAILURE(status)) {
671 ACPI_ERROR_NAMESPACE(walk_state->scope_info,
672 arg->common.value.string, status);
673 return_ACPI_STATUS(status);
674 }
675
676 /*
677 * Third arg is the bank_value
678 * This arg is a term_arg, not a constant
679 * It will be evaluated later, by acpi_ds_eval_bank_field_operands
680 */
681 arg = arg->common.next;
682
683 /* Fourth arg is the field flags */
684
685 arg = arg->common.next;
686 info.field_flags = (u8) arg->common.value.integer;
687
688 /* Each remaining arg is a Named Field */
689
690 info.field_type = ACPI_TYPE_LOCAL_BANK_FIELD;
691 info.region_node = region_node;
692
693 /*
694 * Use Info.data_register_node to store bank_field Op
695 * It's safe because data_register_node will never be used when create
696 * bank field \we store aml_start and aml_length in the bank_field Op for
697 * late evaluation. Used in acpi_ex_prep_field_value(Info)
698 *
699 * TBD: Or, should we add a field in struct acpi_create_field_info, like
700 * "void *ParentOp"?
701 */
702 info.data_register_node = (struct acpi_namespace_node *)op;
703
704 status = acpi_ds_get_field_names(&info, walk_state, arg->common.next);
705 return_ACPI_STATUS(status);
706}
707
708/*******************************************************************************
709 *
710 * FUNCTION: acpi_ds_create_index_field
711 *
712 * PARAMETERS: op - Op containing the Field definition and args
713 * region_node - Object for the containing Operation Region
714 * ` walk_state - Current method state
715 *
716 * RETURN: Status
717 *
718 * DESCRIPTION: Create a new index field in the specified operation region
719 *
720 ******************************************************************************/
721
722acpi_status
723acpi_ds_create_index_field(union acpi_parse_object *op,
724 struct acpi_namespace_node *region_node,
725 struct acpi_walk_state *walk_state)
726{
727 acpi_status status;
728 union acpi_parse_object *arg;
729 struct acpi_create_field_info info;
730
731 ACPI_FUNCTION_TRACE_PTR(ds_create_index_field, op);
732
733 /* First arg is the name of the Index register (must already exist) */
734
735 arg = op->common.value.arg;
736 status =
737 acpi_ns_lookup(walk_state->scope_info, arg->common.value.string,
738 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
739 ACPI_NS_SEARCH_PARENT, walk_state,
740 &info.register_node);
741 if (ACPI_FAILURE(status)) {
742 ACPI_ERROR_NAMESPACE(walk_state->scope_info,
743 arg->common.value.string, status);
744 return_ACPI_STATUS(status);
745 }
746
747 /* Second arg is the data register (must already exist) */
748
749 arg = arg->common.next;
750 status =
751 acpi_ns_lookup(walk_state->scope_info, arg->common.value.string,
752 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
753 ACPI_NS_SEARCH_PARENT, walk_state,
754 &info.data_register_node);
755 if (ACPI_FAILURE(status)) {
756 ACPI_ERROR_NAMESPACE(walk_state->scope_info,
757 arg->common.value.string, status);
758 return_ACPI_STATUS(status);
759 }
760
761 /* Next arg is the field flags */
762
763 arg = arg->common.next;
764 info.field_flags = (u8) arg->common.value.integer;
765
766 /* Each remaining arg is a Named Field */
767
768 info.field_type = ACPI_TYPE_LOCAL_INDEX_FIELD;
769 info.region_node = region_node;
770
771 status = acpi_ds_get_field_names(&info, walk_state, arg->common.next);
772 return_ACPI_STATUS(status);
773}