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Fix crash with FLAT_MEMORY and ARCH_PFN_OFFSET != 0
[pv_ops_mirror.git] / drivers / acpi / dispatcher / dsobject.c
blob954ac8ce958a63c55a6740a4dcc1bbab5e4071bc
1 /******************************************************************************
2 *
3 * Module Name: dsobject - Dispatcher object management routines
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2007, R. Byron Moore
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 <acpi/acparser.h>
46 #include <acpi/amlcode.h>
47 #include <acpi/acdispat.h>
48 #include <acpi/acnamesp.h>
49 #include <acpi/acinterp.h>
50
51 #define _COMPONENT ACPI_DISPATCHER
52 ACPI_MODULE_NAME("dsobject")
53
54 /* Local prototypes */
55 static acpi_status
56 acpi_ds_build_internal_object(struct acpi_walk_state *walk_state,
57 union acpi_parse_object *op,
58 union acpi_operand_object **obj_desc_ptr);
59
60 #ifndef ACPI_NO_METHOD_EXECUTION
61 /*******************************************************************************
62 *
63 * FUNCTION: acpi_ds_build_internal_object
64 *
65 * PARAMETERS: walk_state - Current walk state
66 * Op - Parser object to be translated
67 * obj_desc_ptr - Where the ACPI internal object is returned
68 *
69 * RETURN: Status
70 *
71 * DESCRIPTION: Translate a parser Op object to the equivalent namespace object
72 * Simple objects are any objects other than a package object!
73 *
74 ******************************************************************************/
75
76 static acpi_status
77 acpi_ds_build_internal_object(struct acpi_walk_state *walk_state,
78 union acpi_parse_object *op,
79 union acpi_operand_object **obj_desc_ptr)
80 {
81 union acpi_operand_object *obj_desc;
82 acpi_status status;
83
84 ACPI_FUNCTION_TRACE(ds_build_internal_object);
85
86 *obj_desc_ptr = NULL;
87 if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
88 /*
89 * This is a named object reference. If this name was
90 * previously looked up in the namespace, it was stored in this op.
91 * Otherwise, go ahead and look it up now
92 */
93 if (!op->common.node) {
94 status = acpi_ns_lookup(walk_state->scope_info,
95 op->common.value.string,
96 ACPI_TYPE_ANY,
97 ACPI_IMODE_EXECUTE,
98 ACPI_NS_SEARCH_PARENT |
99 ACPI_NS_DONT_OPEN_SCOPE, NULL,
100 ACPI_CAST_INDIRECT_PTR(struct
101 acpi_namespace_node,
102 &(op->
103 common.
104 node)));
105 if (ACPI_FAILURE(status)) {
106
107 /* Check if we are resolving a named reference within a package */
108
109 if ((status == AE_NOT_FOUND)
110 && (acpi_gbl_enable_interpreter_slack)
111 &&
112 ((op->common.parent->common.aml_opcode ==
113 AML_PACKAGE_OP)
114 || (op->common.parent->common.aml_opcode ==
115 AML_VAR_PACKAGE_OP))) {
116 /*
117 * We didn't find the target and we are populating elements
118 * of a package - ignore if slack enabled. Some ASL code
119 * contains dangling invalid references in packages and
120 * expects that no exception will be issued. Leave the
121 * element as a null element. It cannot be used, but it
122 * can be overwritten by subsequent ASL code - this is
123 * typically the case.
124 */
125 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
126 "Ignoring unresolved reference in package [%4.4s]\n",
127 walk_state->
128 scope_info->scope.
129 node->name.ascii));
130
131 return_ACPI_STATUS(AE_OK);
132 } else {
133 ACPI_ERROR_NAMESPACE(op->common.value.
134 string, status);
135 }
136
137 return_ACPI_STATUS(status);
138 }
139 }
140
141 /* Special object resolution for elements of a package */
142
143 if ((op->common.parent->common.aml_opcode == AML_PACKAGE_OP) ||
144 (op->common.parent->common.aml_opcode ==
145 AML_VAR_PACKAGE_OP)) {
146 /*
147 * Attempt to resolve the node to a value before we insert it into
148 * the package. If this is a reference to a common data type,
149 * resolve it immediately. According to the ACPI spec, package
150 * elements can only be "data objects" or method references.
151 * Attempt to resolve to an Integer, Buffer, String or Package.
152 * If cannot, return the named reference (for things like Devices,
153 * Methods, etc.) Buffer Fields and Fields will resolve to simple
154 * objects (int/buf/str/pkg).
155 *
156 * NOTE: References to things like Devices, Methods, Mutexes, etc.
157 * will remain as named references. This behavior is not described
158 * in the ACPI spec, but it appears to be an oversight.
159 */
160 obj_desc = (union acpi_operand_object *)op->common.node;
161
162 status =
163 acpi_ex_resolve_node_to_value(ACPI_CAST_INDIRECT_PTR
164 (struct
165 acpi_namespace_node,
166 &obj_desc),
167 walk_state);
168 if (ACPI_FAILURE(status)) {
169 return_ACPI_STATUS(status);
170 }
171
172 switch (op->common.node->type) {
173 /*
174 * For these types, we need the actual node, not the subobject.
175 * However, the subobject got an extra reference count above.
176 */
177 case ACPI_TYPE_MUTEX:
178 case ACPI_TYPE_METHOD:
179 case ACPI_TYPE_POWER:
180 case ACPI_TYPE_PROCESSOR:
181 case ACPI_TYPE_EVENT:
182 case ACPI_TYPE_REGION:
183 case ACPI_TYPE_DEVICE:
184 case ACPI_TYPE_THERMAL:
185
186 obj_desc =
187 (union acpi_operand_object *)op->common.
188 node;
189 break;
190
191 default:
192 break;
193 }
194
195 /*
196 * If above resolved to an operand object, we are done. Otherwise,
197 * we have a NS node, we must create the package entry as a named
198 * reference.
199 */
200 if (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) !=
201 ACPI_DESC_TYPE_NAMED) {
202 goto exit;
203 }
204 }
205 }
206
207 /* Create and init a new internal ACPI object */
208
209 obj_desc = acpi_ut_create_internal_object((acpi_ps_get_opcode_info
210 (op->common.aml_opcode))->
211 object_type);
212 if (!obj_desc) {
213 return_ACPI_STATUS(AE_NO_MEMORY);
214 }
215
216 status =
217 acpi_ds_init_object_from_op(walk_state, op, op->common.aml_opcode,
218 &obj_desc);
219 if (ACPI_FAILURE(status)) {
220 acpi_ut_remove_reference(obj_desc);
221 return_ACPI_STATUS(status);
222 }
223
224 exit:
225 *obj_desc_ptr = obj_desc;
226 return_ACPI_STATUS(AE_OK);
227 }
228
229 /*******************************************************************************
230 *
231 * FUNCTION: acpi_ds_build_internal_buffer_obj
232 *
233 * PARAMETERS: walk_state - Current walk state
234 * Op - Parser object to be translated
235 * buffer_length - Length of the buffer
236 * obj_desc_ptr - Where the ACPI internal object is returned
237 *
238 * RETURN: Status
239 *
240 * DESCRIPTION: Translate a parser Op package object to the equivalent
241 * namespace object
242 *
243 ******************************************************************************/
244
245 acpi_status
246 acpi_ds_build_internal_buffer_obj(struct acpi_walk_state *walk_state,
247 union acpi_parse_object *op,
248 u32 buffer_length,
249 union acpi_operand_object **obj_desc_ptr)
250 {
251 union acpi_parse_object *arg;
252 union acpi_operand_object *obj_desc;
253 union acpi_parse_object *byte_list;
254 u32 byte_list_length = 0;
255
256 ACPI_FUNCTION_TRACE(ds_build_internal_buffer_obj);
257
258 /*
259 * If we are evaluating a Named buffer object "Name (xxxx, Buffer)".
260 * The buffer object already exists (from the NS node), otherwise it must
261 * be created.
262 */
263 obj_desc = *obj_desc_ptr;
264 if (!obj_desc) {
265
266 /* Create a new buffer object */
267
268 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER);
269 *obj_desc_ptr = obj_desc;
270 if (!obj_desc) {
271 return_ACPI_STATUS(AE_NO_MEMORY);
272 }
273 }
274
275 /*
276 * Second arg is the buffer data (optional) byte_list can be either
277 * individual bytes or a string initializer. In either case, a
278 * byte_list appears in the AML.
279 */
280 arg = op->common.value.arg; /* skip first arg */
281
282 byte_list = arg->named.next;
283 if (byte_list) {
284 if (byte_list->common.aml_opcode != AML_INT_BYTELIST_OP) {
285 ACPI_ERROR((AE_INFO,
286 "Expecting bytelist, got AML opcode %X in op %p",
287 byte_list->common.aml_opcode, byte_list));
288
289 acpi_ut_remove_reference(obj_desc);
290 return (AE_TYPE);
291 }
292
293 byte_list_length = (u32) byte_list->common.value.integer;
294 }
295
296 /*
297 * The buffer length (number of bytes) will be the larger of:
298 * 1) The specified buffer length and
299 * 2) The length of the initializer byte list
300 */
301 obj_desc->buffer.length = buffer_length;
302 if (byte_list_length > buffer_length) {
303 obj_desc->buffer.length = byte_list_length;
304 }
305
306 /* Allocate the buffer */
307
308 if (obj_desc->buffer.length == 0) {
309 obj_desc->buffer.pointer = NULL;
310 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
311 "Buffer defined with zero length in AML, creating\n"));
312 } else {
313 obj_desc->buffer.pointer =
314 ACPI_ALLOCATE_ZEROED(obj_desc->buffer.length);
315 if (!obj_desc->buffer.pointer) {
316 acpi_ut_delete_object_desc(obj_desc);
317 return_ACPI_STATUS(AE_NO_MEMORY);
318 }
319
320 /* Initialize buffer from the byte_list (if present) */
321
322 if (byte_list) {
323 ACPI_MEMCPY(obj_desc->buffer.pointer,
324 byte_list->named.data, byte_list_length);
325 }
326 }
327
328 obj_desc->buffer.flags |= AOPOBJ_DATA_VALID;
329 op->common.node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_desc);
330 return_ACPI_STATUS(AE_OK);
331 }
332
333 /*******************************************************************************
334 *
335 * FUNCTION: acpi_ds_build_internal_package_obj
336 *
337 * PARAMETERS: walk_state - Current walk state
338 * Op - Parser object to be translated
339 * element_count - Number of elements in the package - this is
340 * the num_elements argument to Package()
341 * obj_desc_ptr - Where the ACPI internal object is returned
342 *
343 * RETURN: Status
344 *
345 * DESCRIPTION: Translate a parser Op package object to the equivalent
346 * namespace object
347 *
348 * NOTE: The number of elements in the package will be always be the num_elements
349 * count, regardless of the number of elements in the package list. If
350 * num_elements is smaller, only that many package list elements are used.
351 * if num_elements is larger, the Package object is padded out with
352 * objects of type Uninitialized (as per ACPI spec.)
353 *
354 * Even though the ASL compilers do not allow num_elements to be smaller
355 * than the Package list length (for the fixed length package opcode), some
356 * BIOS code modifies the AML on the fly to adjust the num_elements, and
357 * this code compensates for that. This also provides compatibility with
358 * other AML interpreters.
359 *
360 ******************************************************************************/
361
362 acpi_status
363 acpi_ds_build_internal_package_obj(struct acpi_walk_state *walk_state,
364 union acpi_parse_object *op,
365 u32 element_count,
366 union acpi_operand_object **obj_desc_ptr)
367 {
368 union acpi_parse_object *arg;
369 union acpi_parse_object *parent;
370 union acpi_operand_object *obj_desc = NULL;
371 acpi_status status = AE_OK;
372 acpi_native_uint i;
373
374 ACPI_FUNCTION_TRACE(ds_build_internal_package_obj);
375
376 /* Find the parent of a possibly nested package */
377
378 parent = op->common.parent;
379 while ((parent->common.aml_opcode == AML_PACKAGE_OP) ||
380 (parent->common.aml_opcode == AML_VAR_PACKAGE_OP)) {
381 parent = parent->common.parent;
382 }
383
384 /*
385 * If we are evaluating a Named package object "Name (xxxx, Package)",
386 * the package object already exists, otherwise it must be created.
387 */
388 obj_desc = *obj_desc_ptr;
389 if (!obj_desc) {
390 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_PACKAGE);
391 *obj_desc_ptr = obj_desc;
392 if (!obj_desc) {
393 return_ACPI_STATUS(AE_NO_MEMORY);
394 }
395
396 obj_desc->package.node = parent->common.node;
397 }
398
399 /*
400 * Allocate the element array (array of pointers to the individual
401 * objects) based on the num_elements parameter. Add an extra pointer slot
402 * so that the list is always null terminated.
403 */
404 obj_desc->package.elements = ACPI_ALLOCATE_ZEROED(((acpi_size)
405 element_count +
406 1) * sizeof(void *));
407
408 if (!obj_desc->package.elements) {
409 acpi_ut_delete_object_desc(obj_desc);
410 return_ACPI_STATUS(AE_NO_MEMORY);
411 }
412
413 obj_desc->package.count = element_count;
414
415 /*
416 * Initialize the elements of the package, up to the num_elements count.
417 * Package is automatically padded with uninitialized (NULL) elements
418 * if num_elements is greater than the package list length. Likewise,
419 * Package is truncated if num_elements is less than the list length.
420 */
421 arg = op->common.value.arg;
422 arg = arg->common.next;
423 for (i = 0; arg && (i < element_count); i++) {
424 if (arg->common.aml_opcode == AML_INT_RETURN_VALUE_OP) {
425 if (arg->common.node->type == ACPI_TYPE_METHOD) {
426 /*
427 * A method reference "looks" to the parser to be a method
428 * invocation, so we special case it here
429 */
430 arg->common.aml_opcode = AML_INT_NAMEPATH_OP;
431 status =
432 acpi_ds_build_internal_object(walk_state,
433 arg,
434 &obj_desc->
435 package.
436 elements[i]);
437 } else {
438 /* This package element is already built, just get it */
439
440 obj_desc->package.elements[i] =
441 ACPI_CAST_PTR(union acpi_operand_object,
442 arg->common.node);
443 }
444 } else {
445 status = acpi_ds_build_internal_object(walk_state, arg,
446 &obj_desc->
447 package.
448 elements[i]);
449 }
450 arg = arg->common.next;
451 }
452
453 if (!arg) {
454 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
455 "Package List length larger than NumElements count (%X), truncated\n",
456 element_count));
457 }
458
459 obj_desc->package.flags |= AOPOBJ_DATA_VALID;
460 op->common.node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_desc);
461 return_ACPI_STATUS(status);
462 }
463
464 /*******************************************************************************
465 *
466 * FUNCTION: acpi_ds_create_node
467 *
468 * PARAMETERS: walk_state - Current walk state
469 * Node - NS Node to be initialized
470 * Op - Parser object to be translated
471 *
472 * RETURN: Status
473 *
474 * DESCRIPTION: Create the object to be associated with a namespace node
475 *
476 ******************************************************************************/
477
478 acpi_status
479 acpi_ds_create_node(struct acpi_walk_state *walk_state,
480 struct acpi_namespace_node *node,
481 union acpi_parse_object *op)
482 {
483 acpi_status status;
484 union acpi_operand_object *obj_desc;
485
486 ACPI_FUNCTION_TRACE_PTR(ds_create_node, op);
487
488 /*
489 * Because of the execution pass through the non-control-method
490 * parts of the table, we can arrive here twice. Only init
491 * the named object node the first time through
492 */
493 if (acpi_ns_get_attached_object(node)) {
494 return_ACPI_STATUS(AE_OK);
495 }
496
497 if (!op->common.value.arg) {
498
499 /* No arguments, there is nothing to do */
500
501 return_ACPI_STATUS(AE_OK);
502 }
503
504 /* Build an internal object for the argument(s) */
505
506 status = acpi_ds_build_internal_object(walk_state, op->common.value.arg,
507 &obj_desc);
508 if (ACPI_FAILURE(status)) {
509 return_ACPI_STATUS(status);
510 }
511
512 /* Re-type the object according to its argument */
513
514 node->type = ACPI_GET_OBJECT_TYPE(obj_desc);
515
516 /* Attach obj to node */
517
518 status = acpi_ns_attach_object(node, obj_desc, node->type);
519
520 /* Remove local reference to the object */
521
522 acpi_ut_remove_reference(obj_desc);
523 return_ACPI_STATUS(status);
524 }
525
526 #endif /* ACPI_NO_METHOD_EXECUTION */
527
528 /*******************************************************************************
529 *
530 * FUNCTION: acpi_ds_init_object_from_op
531 *
532 * PARAMETERS: walk_state - Current walk state
533 * Op - Parser op used to init the internal object
534 * Opcode - AML opcode associated with the object
535 * ret_obj_desc - Namespace object to be initialized
536 *
537 * RETURN: Status
538 *
539 * DESCRIPTION: Initialize a namespace object from a parser Op and its
540 * associated arguments. The namespace object is a more compact
541 * representation of the Op and its arguments.
542 *
543 ******************************************************************************/
544
545 acpi_status
546 acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state,
547 union acpi_parse_object *op,
548 u16 opcode,
549 union acpi_operand_object **ret_obj_desc)
550 {
551 const struct acpi_opcode_info *op_info;
552 union acpi_operand_object *obj_desc;
553 acpi_status status = AE_OK;
554
555 ACPI_FUNCTION_TRACE(ds_init_object_from_op);
556
557 obj_desc = *ret_obj_desc;
558 op_info = acpi_ps_get_opcode_info(opcode);
559 if (op_info->class == AML_CLASS_UNKNOWN) {
560
561 /* Unknown opcode */
562
563 return_ACPI_STATUS(AE_TYPE);
564 }
565
566 /* Perform per-object initialization */
567
568 switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
569 case ACPI_TYPE_BUFFER:
570
571 /*
572 * Defer evaluation of Buffer term_arg operand
573 */
574 obj_desc->buffer.node =
575 ACPI_CAST_PTR(struct acpi_namespace_node,
576 walk_state->operands[0]);
577 obj_desc->buffer.aml_start = op->named.data;
578 obj_desc->buffer.aml_length = op->named.length;
579 break;
580
581 case ACPI_TYPE_PACKAGE:
582
583 /*
584 * Defer evaluation of Package term_arg operand
585 */
586 obj_desc->package.node =
587 ACPI_CAST_PTR(struct acpi_namespace_node,
588 walk_state->operands[0]);
589 obj_desc->package.aml_start = op->named.data;
590 obj_desc->package.aml_length = op->named.length;
591 break;
592
593 case ACPI_TYPE_INTEGER:
594
595 switch (op_info->type) {
596 case AML_TYPE_CONSTANT:
597 /*
598 * Resolve AML Constants here - AND ONLY HERE!
599 * All constants are integers.
600 * We mark the integer with a flag that indicates that it started
601 * life as a constant -- so that stores to constants will perform
602 * as expected (noop). zero_op is used as a placeholder for optional
603 * target operands.
604 */
605 obj_desc->common.flags = AOPOBJ_AML_CONSTANT;
606
607 switch (opcode) {
608 case AML_ZERO_OP:
609
610 obj_desc->integer.value = 0;
611 break;
612
613 case AML_ONE_OP:
614
615 obj_desc->integer.value = 1;
616 break;
617
618 case AML_ONES_OP:
619
620 obj_desc->integer.value = ACPI_INTEGER_MAX;
621
622 /* Truncate value if we are executing from a 32-bit ACPI table */
623
624 #ifndef ACPI_NO_METHOD_EXECUTION
625 acpi_ex_truncate_for32bit_table(obj_desc);
626 #endif
627 break;
628
629 case AML_REVISION_OP:
630
631 obj_desc->integer.value = ACPI_CA_VERSION;
632 break;
633
634 default:
635
636 ACPI_ERROR((AE_INFO,
637 "Unknown constant opcode %X",
638 opcode));
639 status = AE_AML_OPERAND_TYPE;
640 break;
641 }
642 break;
643
644 case AML_TYPE_LITERAL:
645
646 obj_desc->integer.value = op->common.value.integer;
647 #ifndef ACPI_NO_METHOD_EXECUTION
648 acpi_ex_truncate_for32bit_table(obj_desc);
649 #endif
650 break;
651
652 default:
653 ACPI_ERROR((AE_INFO, "Unknown Integer type %X",
654 op_info->type));
655 status = AE_AML_OPERAND_TYPE;
656 break;
657 }
658 break;
659
660 case ACPI_TYPE_STRING:
661
662 obj_desc->string.pointer = op->common.value.string;
663 obj_desc->string.length =
664 (u32) ACPI_STRLEN(op->common.value.string);
665
666 /*
667 * The string is contained in the ACPI table, don't ever try
668 * to delete it
669 */
670 obj_desc->common.flags |= AOPOBJ_STATIC_POINTER;
671 break;
672
673 case ACPI_TYPE_METHOD:
674 break;
675
676 case ACPI_TYPE_LOCAL_REFERENCE:
677
678 switch (op_info->type) {
679 case AML_TYPE_LOCAL_VARIABLE:
680
681 /* Split the opcode into a base opcode + offset */
682
683 obj_desc->reference.opcode = AML_LOCAL_OP;
684 obj_desc->reference.offset = opcode - AML_LOCAL_OP;
685
686 #ifndef ACPI_NO_METHOD_EXECUTION
687 status = acpi_ds_method_data_get_node(AML_LOCAL_OP,
688 obj_desc->
689 reference.offset,
690 walk_state,
691 (struct
692 acpi_namespace_node
693 **)&obj_desc->
694 reference.object);
695 #endif
696 break;
697
698 case AML_TYPE_METHOD_ARGUMENT:
699
700 /* Split the opcode into a base opcode + offset */
701
702 obj_desc->reference.opcode = AML_ARG_OP;
703 obj_desc->reference.offset = opcode - AML_ARG_OP;
704
705 #ifndef ACPI_NO_METHOD_EXECUTION
706 status = acpi_ds_method_data_get_node(AML_ARG_OP,
707 obj_desc->
708 reference.offset,
709 walk_state,
710 (struct
711 acpi_namespace_node
712 **)&obj_desc->
713 reference.object);
714 #endif
715 break;
716
717 default: /* Other literals, etc.. */
718
719 if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
720
721 /* Node was saved in Op */
722
723 obj_desc->reference.node = op->common.node;
724 }
725
726 obj_desc->reference.opcode = opcode;
727 break;
728 }
729 break;
730
731 default:
732
733 ACPI_ERROR((AE_INFO, "Unimplemented data type: %X",
734 ACPI_GET_OBJECT_TYPE(obj_desc)));
735
736 status = AE_AML_OPERAND_TYPE;
737 break;
738 }
739
740 return_ACPI_STATUS(status);
741 }
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