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lp: move compat_ioctl handling into lp.c
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / acpi / acpica / dsobject.c
blob9bc1ba07634777ee73315cded8dea9ba68df4add
1 /******************************************************************************
2 *
3 * Module Name: dsobject - Dispatcher object management routines
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2008, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44 #include <acpi/acpi.h>
45 #include "accommon.h"
46 #include "acparser.h"
47 #include "amlcode.h"
48 #include "acdispat.h"
49 #include "acnamesp.h"
50 #include "acinterp.h"
51
52 #define _COMPONENT ACPI_DISPATCHER
53 ACPI_MODULE_NAME("dsobject")
54
55 /* Local prototypes */
56 static acpi_status
57 acpi_ds_build_internal_object(struct acpi_walk_state *walk_state,
58 union acpi_parse_object *op,
59 union acpi_operand_object **obj_desc_ptr);
60
61 #ifndef ACPI_NO_METHOD_EXECUTION
62 /*******************************************************************************
63 *
64 * FUNCTION: acpi_ds_build_internal_object
65 *
66 * PARAMETERS: walk_state - Current walk state
67 * Op - Parser object to be translated
68 * obj_desc_ptr - Where the ACPI internal object is returned
69 *
70 * RETURN: Status
71 *
72 * DESCRIPTION: Translate a parser Op object to the equivalent namespace object
73 * Simple objects are any objects other than a package object!
74 *
75 ******************************************************************************/
76
77 static acpi_status
78 acpi_ds_build_internal_object(struct acpi_walk_state *walk_state,
79 union acpi_parse_object *op,
80 union acpi_operand_object **obj_desc_ptr)
81 {
82 union acpi_operand_object *obj_desc;
83 acpi_status status;
84
85 ACPI_FUNCTION_TRACE(ds_build_internal_object);
86
87 *obj_desc_ptr = NULL;
88 if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
89 /*
90 * This is a named object reference. If this name was
91 * previously looked up in the namespace, it was stored in this op.
92 * Otherwise, go ahead and look it up now
93 */
94 if (!op->common.node) {
95 status = acpi_ns_lookup(walk_state->scope_info,
96 op->common.value.string,
97 ACPI_TYPE_ANY,
98 ACPI_IMODE_EXECUTE,
99 ACPI_NS_SEARCH_PARENT |
100 ACPI_NS_DONT_OPEN_SCOPE, NULL,
101 ACPI_CAST_INDIRECT_PTR(struct
102 acpi_namespace_node,
103 &(op->
104 common.
105 node)));
106 if (ACPI_FAILURE(status)) {
107
108 /* Check if we are resolving a named reference within a package */
109
110 if ((status == AE_NOT_FOUND)
111 && (acpi_gbl_enable_interpreter_slack)
112 &&
113 ((op->common.parent->common.aml_opcode ==
114 AML_PACKAGE_OP)
115 || (op->common.parent->common.aml_opcode ==
116 AML_VAR_PACKAGE_OP))) {
117 /*
118 * We didn't find the target and we are populating elements
119 * of a package - ignore if slack enabled. Some ASL code
120 * contains dangling invalid references in packages and
121 * expects that no exception will be issued. Leave the
122 * element as a null element. It cannot be used, but it
123 * can be overwritten by subsequent ASL code - this is
124 * typically the case.
125 */
126 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
127 "Ignoring unresolved reference in package [%4.4s]\n",
128 walk_state->
129 scope_info->scope.
130 node->name.ascii));
131
132 return_ACPI_STATUS(AE_OK);
133 } else {
134 ACPI_ERROR_NAMESPACE(op->common.value.
135 string, status);
136 }
137
138 return_ACPI_STATUS(status);
139 }
140 }
141
142 /* Special object resolution for elements of a package */
143
144 if ((op->common.parent->common.aml_opcode == AML_PACKAGE_OP) ||
145 (op->common.parent->common.aml_opcode ==
146 AML_VAR_PACKAGE_OP)) {
147 /*
148 * Attempt to resolve the node to a value before we insert it into
149 * the package. If this is a reference to a common data type,
150 * resolve it immediately. According to the ACPI spec, package
151 * elements can only be "data objects" or method references.
152 * Attempt to resolve to an Integer, Buffer, String or Package.
153 * If cannot, return the named reference (for things like Devices,
154 * Methods, etc.) Buffer Fields and Fields will resolve to simple
155 * objects (int/buf/str/pkg).
156 *
157 * NOTE: References to things like Devices, Methods, Mutexes, etc.
158 * will remain as named references. This behavior is not described
159 * in the ACPI spec, but it appears to be an oversight.
160 */
161 obj_desc =
162 ACPI_CAST_PTR(union acpi_operand_object,
163 op->common.node);
164
165 status =
166 acpi_ex_resolve_node_to_value(ACPI_CAST_INDIRECT_PTR
167 (struct
168 acpi_namespace_node,
169 &obj_desc),
170 walk_state);
171 if (ACPI_FAILURE(status)) {
172 return_ACPI_STATUS(status);
173 }
174
175 switch (op->common.node->type) {
176 /*
177 * For these types, we need the actual node, not the subobject.
178 * However, the subobject did not get an extra reference count above.
179 *
180 * TBD: should ex_resolve_node_to_value be changed to fix this?
181 */
182 case ACPI_TYPE_DEVICE:
183 case ACPI_TYPE_THERMAL:
184
185 acpi_ut_add_reference(op->common.node->object);
186
187 /*lint -fallthrough */
188 /*
189 * For these types, we need the actual node, not the subobject.
190 * The subobject got an extra reference count in ex_resolve_node_to_value.
191 */
192 case ACPI_TYPE_MUTEX:
193 case ACPI_TYPE_METHOD:
194 case ACPI_TYPE_POWER:
195 case ACPI_TYPE_PROCESSOR:
196 case ACPI_TYPE_EVENT:
197 case ACPI_TYPE_REGION:
198
199 /* We will create a reference object for these types below */
200 break;
201
202 default:
203 /*
204 * All other types - the node was resolved to an actual
205 * object, we are done.
206 */
207 goto exit;
208 }
209 }
210 }
211
212 /* Create and init a new internal ACPI object */
213
214 obj_desc = acpi_ut_create_internal_object((acpi_ps_get_opcode_info
215 (op->common.aml_opcode))->
216 object_type);
217 if (!obj_desc) {
218 return_ACPI_STATUS(AE_NO_MEMORY);
219 }
220
221 status =
222 acpi_ds_init_object_from_op(walk_state, op, op->common.aml_opcode,
223 &obj_desc);
224 if (ACPI_FAILURE(status)) {
225 acpi_ut_remove_reference(obj_desc);
226 return_ACPI_STATUS(status);
227 }
228
229 exit:
230 *obj_desc_ptr = obj_desc;
231 return_ACPI_STATUS(status);
232 }
233
234 /*******************************************************************************
235 *
236 * FUNCTION: acpi_ds_build_internal_buffer_obj
237 *
238 * PARAMETERS: walk_state - Current walk state
239 * Op - Parser object to be translated
240 * buffer_length - Length of the buffer
241 * obj_desc_ptr - Where the ACPI internal object is returned
242 *
243 * RETURN: Status
244 *
245 * DESCRIPTION: Translate a parser Op package object to the equivalent
246 * namespace object
247 *
248 ******************************************************************************/
249
250 acpi_status
251 acpi_ds_build_internal_buffer_obj(struct acpi_walk_state *walk_state,
252 union acpi_parse_object *op,
253 u32 buffer_length,
254 union acpi_operand_object **obj_desc_ptr)
255 {
256 union acpi_parse_object *arg;
257 union acpi_operand_object *obj_desc;
258 union acpi_parse_object *byte_list;
259 u32 byte_list_length = 0;
260
261 ACPI_FUNCTION_TRACE(ds_build_internal_buffer_obj);
262
263 /*
264 * If we are evaluating a Named buffer object "Name (xxxx, Buffer)".
265 * The buffer object already exists (from the NS node), otherwise it must
266 * be created.
267 */
268 obj_desc = *obj_desc_ptr;
269 if (!obj_desc) {
270
271 /* Create a new buffer object */
272
273 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER);
274 *obj_desc_ptr = obj_desc;
275 if (!obj_desc) {
276 return_ACPI_STATUS(AE_NO_MEMORY);
277 }
278 }
279
280 /*
281 * Second arg is the buffer data (optional) byte_list can be either
282 * individual bytes or a string initializer. In either case, a
283 * byte_list appears in the AML.
284 */
285 arg = op->common.value.arg; /* skip first arg */
286
287 byte_list = arg->named.next;
288 if (byte_list) {
289 if (byte_list->common.aml_opcode != AML_INT_BYTELIST_OP) {
290 ACPI_ERROR((AE_INFO,
291 "Expecting bytelist, got AML opcode %X in op %p",
292 byte_list->common.aml_opcode, byte_list));
293
294 acpi_ut_remove_reference(obj_desc);
295 return (AE_TYPE);
296 }
297
298 byte_list_length = (u32) byte_list->common.value.integer;
299 }
300
301 /*
302 * The buffer length (number of bytes) will be the larger of:
303 * 1) The specified buffer length and
304 * 2) The length of the initializer byte list
305 */
306 obj_desc->buffer.length = buffer_length;
307 if (byte_list_length > buffer_length) {
308 obj_desc->buffer.length = byte_list_length;
309 }
310
311 /* Allocate the buffer */
312
313 if (obj_desc->buffer.length == 0) {
314 obj_desc->buffer.pointer = NULL;
315 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
316 "Buffer defined with zero length in AML, creating\n"));
317 } else {
318 obj_desc->buffer.pointer =
319 ACPI_ALLOCATE_ZEROED(obj_desc->buffer.length);
320 if (!obj_desc->buffer.pointer) {
321 acpi_ut_delete_object_desc(obj_desc);
322 return_ACPI_STATUS(AE_NO_MEMORY);
323 }
324
325 /* Initialize buffer from the byte_list (if present) */
326
327 if (byte_list) {
328 ACPI_MEMCPY(obj_desc->buffer.pointer,
329 byte_list->named.data, byte_list_length);
330 }
331 }
332
333 obj_desc->buffer.flags |= AOPOBJ_DATA_VALID;
334 op->common.node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_desc);
335 return_ACPI_STATUS(AE_OK);
336 }
337
338 /*******************************************************************************
339 *
340 * FUNCTION: acpi_ds_build_internal_package_obj
341 *
342 * PARAMETERS: walk_state - Current walk state
343 * Op - Parser object to be translated
344 * element_count - Number of elements in the package - this is
345 * the num_elements argument to Package()
346 * obj_desc_ptr - Where the ACPI internal object is returned
347 *
348 * RETURN: Status
349 *
350 * DESCRIPTION: Translate a parser Op package object to the equivalent
351 * namespace object
352 *
353 * NOTE: The number of elements in the package will be always be the num_elements
354 * count, regardless of the number of elements in the package list. If
355 * num_elements is smaller, only that many package list elements are used.
356 * if num_elements is larger, the Package object is padded out with
357 * objects of type Uninitialized (as per ACPI spec.)
358 *
359 * Even though the ASL compilers do not allow num_elements to be smaller
360 * than the Package list length (for the fixed length package opcode), some
361 * BIOS code modifies the AML on the fly to adjust the num_elements, and
362 * this code compensates for that. This also provides compatibility with
363 * other AML interpreters.
364 *
365 ******************************************************************************/
366
367 acpi_status
368 acpi_ds_build_internal_package_obj(struct acpi_walk_state *walk_state,
369 union acpi_parse_object *op,
370 u32 element_count,
371 union acpi_operand_object **obj_desc_ptr)
372 {
373 union acpi_parse_object *arg;
374 union acpi_parse_object *parent;
375 union acpi_operand_object *obj_desc = NULL;
376 acpi_status status = AE_OK;
377 unsigned i;
378 u16 index;
379 u16 reference_count;
380
381 ACPI_FUNCTION_TRACE(ds_build_internal_package_obj);
382
383 /* Find the parent of a possibly nested package */
384
385 parent = op->common.parent;
386 while ((parent->common.aml_opcode == AML_PACKAGE_OP) ||
387 (parent->common.aml_opcode == AML_VAR_PACKAGE_OP)) {
388 parent = parent->common.parent;
389 }
390
391 /*
392 * If we are evaluating a Named package object "Name (xxxx, Package)",
393 * the package object already exists, otherwise it must be created.
394 */
395 obj_desc = *obj_desc_ptr;
396 if (!obj_desc) {
397 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_PACKAGE);
398 *obj_desc_ptr = obj_desc;
399 if (!obj_desc) {
400 return_ACPI_STATUS(AE_NO_MEMORY);
401 }
402
403 obj_desc->package.node = parent->common.node;
404 }
405
406 /*
407 * Allocate the element array (array of pointers to the individual
408 * objects) based on the num_elements parameter. Add an extra pointer slot
409 * so that the list is always null terminated.
410 */
411 obj_desc->package.elements = ACPI_ALLOCATE_ZEROED(((acpi_size)
412 element_count +
413 1) * sizeof(void *));
414
415 if (!obj_desc->package.elements) {
416 acpi_ut_delete_object_desc(obj_desc);
417 return_ACPI_STATUS(AE_NO_MEMORY);
418 }
419
420 obj_desc->package.count = element_count;
421
422 /*
423 * Initialize the elements of the package, up to the num_elements count.
424 * Package is automatically padded with uninitialized (NULL) elements
425 * if num_elements is greater than the package list length. Likewise,
426 * Package is truncated if num_elements is less than the list length.
427 */
428 arg = op->common.value.arg;
429 arg = arg->common.next;
430 for (i = 0; arg && (i < element_count); i++) {
431 if (arg->common.aml_opcode == AML_INT_RETURN_VALUE_OP) {
432 if (arg->common.node->type == ACPI_TYPE_METHOD) {
433 /*
434 * A method reference "looks" to the parser to be a method
435 * invocation, so we special case it here
436 */
437 arg->common.aml_opcode = AML_INT_NAMEPATH_OP;
438 status =
439 acpi_ds_build_internal_object(walk_state,
440 arg,
441 &obj_desc->
442 package.
443 elements[i]);
444 } else {
445 /* This package element is already built, just get it */
446
447 obj_desc->package.elements[i] =
448 ACPI_CAST_PTR(union acpi_operand_object,
449 arg->common.node);
450 }
451 } else {
452 status = acpi_ds_build_internal_object(walk_state, arg,
453 &obj_desc->
454 package.
455 elements[i]);
456 }
457
458 if (*obj_desc_ptr) {
459
460 /* Existing package, get existing reference count */
461
462 reference_count =
463 (*obj_desc_ptr)->common.reference_count;
464 if (reference_count > 1) {
465
466 /* Make new element ref count match original ref count */
467
468 for (index = 0; index < (reference_count - 1);
469 index++) {
470 acpi_ut_add_reference((obj_desc->
471 package.
472 elements[i]));
473 }
474 }
475 }
476
477 arg = arg->common.next;
478 }
479
480 /* Check for match between num_elements and actual length of package_list */
481
482 if (arg) {
483 /*
484 * num_elements was exhausted, but there are remaining elements in the
485 * package_list. Truncate the package to num_elements.
486 *
487 * Note: technically, this is an error, from ACPI spec: "It is an error
488 * for NumElements to be less than the number of elements in the
489 * PackageList". However, we just print a message and
490 * no exception is returned. This provides Windows compatibility. Some
491 * BIOSs will alter the num_elements on the fly, creating this type
492 * of ill-formed package object.
493 */
494 while (arg) {
495 /*
496 * We must delete any package elements that were created earlier
497 * and are not going to be used because of the package truncation.
498 */
499 if (arg->common.node) {
500 acpi_ut_remove_reference(ACPI_CAST_PTR
501 (union
502 acpi_operand_object,
503 arg->common.node));
504 arg->common.node = NULL;
505 }
506
507 /* Find out how many elements there really are */
508
509 i++;
510 arg = arg->common.next;
511 }
512
513 ACPI_INFO((AE_INFO,
514 "Actual Package length (0x%X) is larger than NumElements field (0x%X), truncated\n",
515 i, element_count));
516 } else if (i < element_count) {
517 /*
518 * Arg list (elements) was exhausted, but we did not reach num_elements count.
519 * Note: this is not an error, the package is padded out with NULLs.
520 */
521 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
522 "Package List length (0x%X) smaller than NumElements count (0x%X), padded with null elements\n",
523 i, element_count));
524 }
525
526 obj_desc->package.flags |= AOPOBJ_DATA_VALID;
527 op->common.node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_desc);
528 return_ACPI_STATUS(status);
529 }
530
531 /*******************************************************************************
532 *
533 * FUNCTION: acpi_ds_create_node
534 *
535 * PARAMETERS: walk_state - Current walk state
536 * Node - NS Node to be initialized
537 * Op - Parser object to be translated
538 *
539 * RETURN: Status
540 *
541 * DESCRIPTION: Create the object to be associated with a namespace node
542 *
543 ******************************************************************************/
544
545 acpi_status
546 acpi_ds_create_node(struct acpi_walk_state *walk_state,
547 struct acpi_namespace_node *node,
548 union acpi_parse_object *op)
549 {
550 acpi_status status;
551 union acpi_operand_object *obj_desc;
552
553 ACPI_FUNCTION_TRACE_PTR(ds_create_node, op);
554
555 /*
556 * Because of the execution pass through the non-control-method
557 * parts of the table, we can arrive here twice. Only init
558 * the named object node the first time through
559 */
560 if (acpi_ns_get_attached_object(node)) {
561 return_ACPI_STATUS(AE_OK);
562 }
563
564 if (!op->common.value.arg) {
565
566 /* No arguments, there is nothing to do */
567
568 return_ACPI_STATUS(AE_OK);
569 }
570
571 /* Build an internal object for the argument(s) */
572
573 status = acpi_ds_build_internal_object(walk_state, op->common.value.arg,
574 &obj_desc);
575 if (ACPI_FAILURE(status)) {
576 return_ACPI_STATUS(status);
577 }
578
579 /* Re-type the object according to its argument */
580
581 node->type = obj_desc->common.type;
582
583 /* Attach obj to node */
584
585 status = acpi_ns_attach_object(node, obj_desc, node->type);
586
587 /* Remove local reference to the object */
588
589 acpi_ut_remove_reference(obj_desc);
590 return_ACPI_STATUS(status);
591 }
592
593 #endif /* ACPI_NO_METHOD_EXECUTION */
594
595 /*******************************************************************************
596 *
597 * FUNCTION: acpi_ds_init_object_from_op
598 *
599 * PARAMETERS: walk_state - Current walk state
600 * Op - Parser op used to init the internal object
601 * Opcode - AML opcode associated with the object
602 * ret_obj_desc - Namespace object to be initialized
603 *
604 * RETURN: Status
605 *
606 * DESCRIPTION: Initialize a namespace object from a parser Op and its
607 * associated arguments. The namespace object is a more compact
608 * representation of the Op and its arguments.
609 *
610 ******************************************************************************/
611
612 acpi_status
613 acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state,
614 union acpi_parse_object *op,
615 u16 opcode,
616 union acpi_operand_object **ret_obj_desc)
617 {
618 const struct acpi_opcode_info *op_info;
619 union acpi_operand_object *obj_desc;
620 acpi_status status = AE_OK;
621
622 ACPI_FUNCTION_TRACE(ds_init_object_from_op);
623
624 obj_desc = *ret_obj_desc;
625 op_info = acpi_ps_get_opcode_info(opcode);
626 if (op_info->class == AML_CLASS_UNKNOWN) {
627
628 /* Unknown opcode */
629
630 return_ACPI_STATUS(AE_TYPE);
631 }
632
633 /* Perform per-object initialization */
634
635 switch (obj_desc->common.type) {
636 case ACPI_TYPE_BUFFER:
637
638 /*
639 * Defer evaluation of Buffer term_arg operand
640 */
641 obj_desc->buffer.node =
642 ACPI_CAST_PTR(struct acpi_namespace_node,
643 walk_state->operands[0]);
644 obj_desc->buffer.aml_start = op->named.data;
645 obj_desc->buffer.aml_length = op->named.length;
646 break;
647
648 case ACPI_TYPE_PACKAGE:
649
650 /*
651 * Defer evaluation of Package term_arg operand
652 */
653 obj_desc->package.node =
654 ACPI_CAST_PTR(struct acpi_namespace_node,
655 walk_state->operands[0]);
656 obj_desc->package.aml_start = op->named.data;
657 obj_desc->package.aml_length = op->named.length;
658 break;
659
660 case ACPI_TYPE_INTEGER:
661
662 switch (op_info->type) {
663 case AML_TYPE_CONSTANT:
664 /*
665 * Resolve AML Constants here - AND ONLY HERE!
666 * All constants are integers.
667 * We mark the integer with a flag that indicates that it started
668 * life as a constant -- so that stores to constants will perform
669 * as expected (noop). zero_op is used as a placeholder for optional
670 * target operands.
671 */
672 obj_desc->common.flags = AOPOBJ_AML_CONSTANT;
673
674 switch (opcode) {
675 case AML_ZERO_OP:
676
677 obj_desc->integer.value = 0;
678 break;
679
680 case AML_ONE_OP:
681
682 obj_desc->integer.value = 1;
683 break;
684
685 case AML_ONES_OP:
686
687 obj_desc->integer.value = ACPI_INTEGER_MAX;
688
689 /* Truncate value if we are executing from a 32-bit ACPI table */
690
691 #ifndef ACPI_NO_METHOD_EXECUTION
692 acpi_ex_truncate_for32bit_table(obj_desc);
693 #endif
694 break;
695
696 case AML_REVISION_OP:
697
698 obj_desc->integer.value = ACPI_CA_VERSION;
699 break;
700
701 default:
702
703 ACPI_ERROR((AE_INFO,
704 "Unknown constant opcode %X",
705 opcode));
706 status = AE_AML_OPERAND_TYPE;
707 break;
708 }
709 break;
710
711 case AML_TYPE_LITERAL:
712
713 obj_desc->integer.value = op->common.value.integer;
714 #ifndef ACPI_NO_METHOD_EXECUTION
715 acpi_ex_truncate_for32bit_table(obj_desc);
716 #endif
717 break;
718
719 default:
720 ACPI_ERROR((AE_INFO, "Unknown Integer type %X",
721 op_info->type));
722 status = AE_AML_OPERAND_TYPE;
723 break;
724 }
725 break;
726
727 case ACPI_TYPE_STRING:
728
729 obj_desc->string.pointer = op->common.value.string;
730 obj_desc->string.length =
731 (u32) ACPI_STRLEN(op->common.value.string);
732
733 /*
734 * The string is contained in the ACPI table, don't ever try
735 * to delete it
736 */
737 obj_desc->common.flags |= AOPOBJ_STATIC_POINTER;
738 break;
739
740 case ACPI_TYPE_METHOD:
741 break;
742
743 case ACPI_TYPE_LOCAL_REFERENCE:
744
745 switch (op_info->type) {
746 case AML_TYPE_LOCAL_VARIABLE:
747
748 /* Local ID (0-7) is (AML opcode - base AML_LOCAL_OP) */
749
750 obj_desc->reference.value =
751 ((u32)opcode) - AML_LOCAL_OP;
752 obj_desc->reference.class = ACPI_REFCLASS_LOCAL;
753
754 #ifndef ACPI_NO_METHOD_EXECUTION
755 status =
756 acpi_ds_method_data_get_node(ACPI_REFCLASS_LOCAL,
757 obj_desc->reference.
758 value, walk_state,
759 ACPI_CAST_INDIRECT_PTR
760 (struct
761 acpi_namespace_node,
762 &obj_desc->reference.
763 object));
764 #endif
765 break;
766
767 case AML_TYPE_METHOD_ARGUMENT:
768
769 /* Arg ID (0-6) is (AML opcode - base AML_ARG_OP) */
770
771 obj_desc->reference.value = ((u32)opcode) - AML_ARG_OP;
772 obj_desc->reference.class = ACPI_REFCLASS_ARG;
773
774 #ifndef ACPI_NO_METHOD_EXECUTION
775 status = acpi_ds_method_data_get_node(ACPI_REFCLASS_ARG,
776 obj_desc->
777 reference.value,
778 walk_state,
779 ACPI_CAST_INDIRECT_PTR
780 (struct
781 acpi_namespace_node,
782 &obj_desc->
783 reference.
784 object));
785 #endif
786 break;
787
788 default: /* Object name or Debug object */
789
790 switch (op->common.aml_opcode) {
791 case AML_INT_NAMEPATH_OP:
792
793 /* Node was saved in Op */
794
795 obj_desc->reference.node = op->common.node;
796 obj_desc->reference.object =
797 op->common.node->object;
798 obj_desc->reference.class = ACPI_REFCLASS_NAME;
799 break;
800
801 case AML_DEBUG_OP:
802
803 obj_desc->reference.class = ACPI_REFCLASS_DEBUG;
804 break;
805
806 default:
807
808 ACPI_ERROR((AE_INFO,
809 "Unimplemented reference type for AML opcode: %4.4X",
810 opcode));
811 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
812 }
813 break;
814 }
815 break;
816
817 default:
818
819 ACPI_ERROR((AE_INFO, "Unimplemented data type: %X",
820 obj_desc->common.type));
821
822 status = AE_AML_OPERAND_TYPE;
823 break;
824 }
825
826 return_ACPI_STATUS(status);
827 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree