Merge branch 'next' into for-linus
[linux-2.6] / drivers / acpi / dispatcher / dsobject.c
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 <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 =
161                             ACPI_CAST_PTR(union acpi_operand_object,
162                                           op->common.node);
163
164                         status =
165                             acpi_ex_resolve_node_to_value(ACPI_CAST_INDIRECT_PTR
166                                                           (struct
167                                                            acpi_namespace_node,
168                                                            &obj_desc),
169                                                           walk_state);
170                         if (ACPI_FAILURE(status)) {
171                                 return_ACPI_STATUS(status);
172                         }
173
174                         switch (op->common.node->type) {
175                                 /*
176                                  * For these types, we need the actual node, not the subobject.
177                                  * However, the subobject did not get an extra reference count above.
178                                  *
179                                  * TBD: should ex_resolve_node_to_value be changed to fix this?
180                                  */
181                         case ACPI_TYPE_DEVICE:
182                         case ACPI_TYPE_THERMAL:
183
184                                 acpi_ut_add_reference(op->common.node->object);
185
186                                 /*lint -fallthrough */
187                                 /*
188                                  * For these types, we need the actual node, not the subobject.
189                                  * The subobject got an extra reference count in ex_resolve_node_to_value.
190                                  */
191                         case ACPI_TYPE_MUTEX:
192                         case ACPI_TYPE_METHOD:
193                         case ACPI_TYPE_POWER:
194                         case ACPI_TYPE_PROCESSOR:
195                         case ACPI_TYPE_EVENT:
196                         case ACPI_TYPE_REGION:
197
198                                 /* We will create a reference object for these types below */
199                                 break;
200
201                         default:
202                                 /*
203                                  * All other types - the node was resolved to an actual
204                                  * object, we are done.
205                                  */
206                                 goto exit;
207                         }
208                 }
209         }
210
211         /* Create and init a new internal ACPI object */
212
213         obj_desc = acpi_ut_create_internal_object((acpi_ps_get_opcode_info
214                                                    (op->common.aml_opcode))->
215                                                   object_type);
216         if (!obj_desc) {
217                 return_ACPI_STATUS(AE_NO_MEMORY);
218         }
219
220         status =
221             acpi_ds_init_object_from_op(walk_state, op, op->common.aml_opcode,
222                                         &obj_desc);
223         if (ACPI_FAILURE(status)) {
224                 acpi_ut_remove_reference(obj_desc);
225                 return_ACPI_STATUS(status);
226         }
227
228       exit:
229         *obj_desc_ptr = obj_desc;
230         return_ACPI_STATUS(status);
231 }
232
233 /*******************************************************************************
234  *
235  * FUNCTION:    acpi_ds_build_internal_buffer_obj
236  *
237  * PARAMETERS:  walk_state      - Current walk state
238  *              Op              - Parser object to be translated
239  *              buffer_length   - Length of the buffer
240  *              obj_desc_ptr    - Where the ACPI internal object is returned
241  *
242  * RETURN:      Status
243  *
244  * DESCRIPTION: Translate a parser Op package object to the equivalent
245  *              namespace object
246  *
247  ******************************************************************************/
248
249 acpi_status
250 acpi_ds_build_internal_buffer_obj(struct acpi_walk_state *walk_state,
251                                   union acpi_parse_object *op,
252                                   u32 buffer_length,
253                                   union acpi_operand_object **obj_desc_ptr)
254 {
255         union acpi_parse_object *arg;
256         union acpi_operand_object *obj_desc;
257         union acpi_parse_object *byte_list;
258         u32 byte_list_length = 0;
259
260         ACPI_FUNCTION_TRACE(ds_build_internal_buffer_obj);
261
262         /*
263          * If we are evaluating a Named buffer object "Name (xxxx, Buffer)".
264          * The buffer object already exists (from the NS node), otherwise it must
265          * be created.
266          */
267         obj_desc = *obj_desc_ptr;
268         if (!obj_desc) {
269
270                 /* Create a new buffer object */
271
272                 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER);
273                 *obj_desc_ptr = obj_desc;
274                 if (!obj_desc) {
275                         return_ACPI_STATUS(AE_NO_MEMORY);
276                 }
277         }
278
279         /*
280          * Second arg is the buffer data (optional) byte_list can be either
281          * individual bytes or a string initializer.  In either case, a
282          * byte_list appears in the AML.
283          */
284         arg = op->common.value.arg;     /* skip first arg */
285
286         byte_list = arg->named.next;
287         if (byte_list) {
288                 if (byte_list->common.aml_opcode != AML_INT_BYTELIST_OP) {
289                         ACPI_ERROR((AE_INFO,
290                                     "Expecting bytelist, got AML opcode %X in op %p",
291                                     byte_list->common.aml_opcode, byte_list));
292
293                         acpi_ut_remove_reference(obj_desc);
294                         return (AE_TYPE);
295                 }
296
297                 byte_list_length = (u32) byte_list->common.value.integer;
298         }
299
300         /*
301          * The buffer length (number of bytes) will be the larger of:
302          * 1) The specified buffer length and
303          * 2) The length of the initializer byte list
304          */
305         obj_desc->buffer.length = buffer_length;
306         if (byte_list_length > buffer_length) {
307                 obj_desc->buffer.length = byte_list_length;
308         }
309
310         /* Allocate the buffer */
311
312         if (obj_desc->buffer.length == 0) {
313                 obj_desc->buffer.pointer = NULL;
314                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
315                                   "Buffer defined with zero length in AML, creating\n"));
316         } else {
317                 obj_desc->buffer.pointer =
318                     ACPI_ALLOCATE_ZEROED(obj_desc->buffer.length);
319                 if (!obj_desc->buffer.pointer) {
320                         acpi_ut_delete_object_desc(obj_desc);
321                         return_ACPI_STATUS(AE_NO_MEMORY);
322                 }
323
324                 /* Initialize buffer from the byte_list (if present) */
325
326                 if (byte_list) {
327                         ACPI_MEMCPY(obj_desc->buffer.pointer,
328                                     byte_list->named.data, byte_list_length);
329                 }
330         }
331
332         obj_desc->buffer.flags |= AOPOBJ_DATA_VALID;
333         op->common.node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_desc);
334         return_ACPI_STATUS(AE_OK);
335 }
336
337 /*******************************************************************************
338  *
339  * FUNCTION:    acpi_ds_build_internal_package_obj
340  *
341  * PARAMETERS:  walk_state      - Current walk state
342  *              Op              - Parser object to be translated
343  *              element_count   - Number of elements in the package - this is
344  *                                the num_elements argument to Package()
345  *              obj_desc_ptr    - Where the ACPI internal object is returned
346  *
347  * RETURN:      Status
348  *
349  * DESCRIPTION: Translate a parser Op package object to the equivalent
350  *              namespace object
351  *
352  * NOTE: The number of elements in the package will be always be the num_elements
353  * count, regardless of the number of elements in the package list. If
354  * num_elements is smaller, only that many package list elements are used.
355  * if num_elements is larger, the Package object is padded out with
356  * objects of type Uninitialized (as per ACPI spec.)
357  *
358  * Even though the ASL compilers do not allow num_elements to be smaller
359  * than the Package list length (for the fixed length package opcode), some
360  * BIOS code modifies the AML on the fly to adjust the num_elements, and
361  * this code compensates for that. This also provides compatibility with
362  * other AML interpreters.
363  *
364  ******************************************************************************/
365
366 acpi_status
367 acpi_ds_build_internal_package_obj(struct acpi_walk_state *walk_state,
368                                    union acpi_parse_object *op,
369                                    u32 element_count,
370                                    union acpi_operand_object **obj_desc_ptr)
371 {
372         union acpi_parse_object *arg;
373         union acpi_parse_object *parent;
374         union acpi_operand_object *obj_desc = NULL;
375         acpi_status status = AE_OK;
376         unsigned i;
377         u16 index;
378         u16 reference_count;
379
380         ACPI_FUNCTION_TRACE(ds_build_internal_package_obj);
381
382         /* Find the parent of a possibly nested package */
383
384         parent = op->common.parent;
385         while ((parent->common.aml_opcode == AML_PACKAGE_OP) ||
386                (parent->common.aml_opcode == AML_VAR_PACKAGE_OP)) {
387                 parent = parent->common.parent;
388         }
389
390         /*
391          * If we are evaluating a Named package object "Name (xxxx, Package)",
392          * the package object already exists, otherwise it must be created.
393          */
394         obj_desc = *obj_desc_ptr;
395         if (!obj_desc) {
396                 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_PACKAGE);
397                 *obj_desc_ptr = obj_desc;
398                 if (!obj_desc) {
399                         return_ACPI_STATUS(AE_NO_MEMORY);
400                 }
401
402                 obj_desc->package.node = parent->common.node;
403         }
404
405         /*
406          * Allocate the element array (array of pointers to the individual
407          * objects) based on the num_elements parameter. Add an extra pointer slot
408          * so that the list is always null terminated.
409          */
410         obj_desc->package.elements = ACPI_ALLOCATE_ZEROED(((acpi_size)
411                                                            element_count +
412                                                            1) * sizeof(void *));
413
414         if (!obj_desc->package.elements) {
415                 acpi_ut_delete_object_desc(obj_desc);
416                 return_ACPI_STATUS(AE_NO_MEMORY);
417         }
418
419         obj_desc->package.count = element_count;
420
421         /*
422          * Initialize the elements of the package, up to the num_elements count.
423          * Package is automatically padded with uninitialized (NULL) elements
424          * if num_elements is greater than the package list length. Likewise,
425          * Package is truncated if num_elements is less than the list length.
426          */
427         arg = op->common.value.arg;
428         arg = arg->common.next;
429         for (i = 0; arg && (i < element_count); i++) {
430                 if (arg->common.aml_opcode == AML_INT_RETURN_VALUE_OP) {
431                         if (arg->common.node->type == ACPI_TYPE_METHOD) {
432                                 /*
433                                  * A method reference "looks" to the parser to be a method
434                                  * invocation, so we special case it here
435                                  */
436                                 arg->common.aml_opcode = AML_INT_NAMEPATH_OP;
437                                 status =
438                                     acpi_ds_build_internal_object(walk_state,
439                                                                   arg,
440                                                                   &obj_desc->
441                                                                   package.
442                                                                   elements[i]);
443                         } else {
444                                 /* This package element is already built, just get it */
445
446                                 obj_desc->package.elements[i] =
447                                     ACPI_CAST_PTR(union acpi_operand_object,
448                                                   arg->common.node);
449                         }
450                 } else {
451                         status = acpi_ds_build_internal_object(walk_state, arg,
452                                                                &obj_desc->
453                                                                package.
454                                                                elements[i]);
455                 }
456
457                 if (*obj_desc_ptr) {
458
459                         /* Existing package, get existing reference count */
460
461                         reference_count =
462                             (*obj_desc_ptr)->common.reference_count;
463                         if (reference_count > 1) {
464
465                                 /* Make new element ref count match original ref count */
466
467                                 for (index = 0; index < (reference_count - 1);
468                                      index++) {
469                                         acpi_ut_add_reference((obj_desc->
470                                                                package.
471                                                                elements[i]));
472                                 }
473                         }
474                 }
475
476                 arg = arg->common.next;
477         }
478
479         /* Check for match between num_elements and actual length of package_list */
480
481         if (arg) {
482                 /*
483                  * num_elements was exhausted, but there are remaining elements in the
484                  * package_list.
485                  *
486                  * Note: technically, this is an error, from ACPI spec: "It is an error
487                  * for NumElements to be less than the number of elements in the
488                  * PackageList". However, for now, we just print an error message and
489                  * no exception is returned.
490                  */
491                 while (arg) {
492
493                         /* Find out how many elements there really are */
494
495                         i++;
496                         arg = arg->common.next;
497                 }
498
499                 ACPI_WARNING((AE_INFO,
500                             "Package List length (%X) larger than NumElements count (%X), truncated\n",
501                             i, element_count));
502         } else if (i < element_count) {
503                 /*
504                  * Arg list (elements) was exhausted, but we did not reach num_elements count.
505                  * Note: this is not an error, the package is padded out with NULLs.
506                  */
507                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
508                                   "Package List length (%X) smaller than NumElements count (%X), padded with null elements\n",
509                                   i, element_count));
510         }
511
512         obj_desc->package.flags |= AOPOBJ_DATA_VALID;
513         op->common.node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_desc);
514         return_ACPI_STATUS(status);
515 }
516
517 /*******************************************************************************
518  *
519  * FUNCTION:    acpi_ds_create_node
520  *
521  * PARAMETERS:  walk_state      - Current walk state
522  *              Node            - NS Node to be initialized
523  *              Op              - Parser object to be translated
524  *
525  * RETURN:      Status
526  *
527  * DESCRIPTION: Create the object to be associated with a namespace node
528  *
529  ******************************************************************************/
530
531 acpi_status
532 acpi_ds_create_node(struct acpi_walk_state *walk_state,
533                     struct acpi_namespace_node *node,
534                     union acpi_parse_object *op)
535 {
536         acpi_status status;
537         union acpi_operand_object *obj_desc;
538
539         ACPI_FUNCTION_TRACE_PTR(ds_create_node, op);
540
541         /*
542          * Because of the execution pass through the non-control-method
543          * parts of the table, we can arrive here twice.  Only init
544          * the named object node the first time through
545          */
546         if (acpi_ns_get_attached_object(node)) {
547                 return_ACPI_STATUS(AE_OK);
548         }
549
550         if (!op->common.value.arg) {
551
552                 /* No arguments, there is nothing to do */
553
554                 return_ACPI_STATUS(AE_OK);
555         }
556
557         /* Build an internal object for the argument(s) */
558
559         status = acpi_ds_build_internal_object(walk_state, op->common.value.arg,
560                                                &obj_desc);
561         if (ACPI_FAILURE(status)) {
562                 return_ACPI_STATUS(status);
563         }
564
565         /* Re-type the object according to its argument */
566
567         node->type = ACPI_GET_OBJECT_TYPE(obj_desc);
568
569         /* Attach obj to node */
570
571         status = acpi_ns_attach_object(node, obj_desc, node->type);
572
573         /* Remove local reference to the object */
574
575         acpi_ut_remove_reference(obj_desc);
576         return_ACPI_STATUS(status);
577 }
578
579 #endif                          /* ACPI_NO_METHOD_EXECUTION */
580
581 /*******************************************************************************
582  *
583  * FUNCTION:    acpi_ds_init_object_from_op
584  *
585  * PARAMETERS:  walk_state      - Current walk state
586  *              Op              - Parser op used to init the internal object
587  *              Opcode          - AML opcode associated with the object
588  *              ret_obj_desc    - Namespace object to be initialized
589  *
590  * RETURN:      Status
591  *
592  * DESCRIPTION: Initialize a namespace object from a parser Op and its
593  *              associated arguments.  The namespace object is a more compact
594  *              representation of the Op and its arguments.
595  *
596  ******************************************************************************/
597
598 acpi_status
599 acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state,
600                             union acpi_parse_object *op,
601                             u16 opcode,
602                             union acpi_operand_object **ret_obj_desc)
603 {
604         const struct acpi_opcode_info *op_info;
605         union acpi_operand_object *obj_desc;
606         acpi_status status = AE_OK;
607
608         ACPI_FUNCTION_TRACE(ds_init_object_from_op);
609
610         obj_desc = *ret_obj_desc;
611         op_info = acpi_ps_get_opcode_info(opcode);
612         if (op_info->class == AML_CLASS_UNKNOWN) {
613
614                 /* Unknown opcode */
615
616                 return_ACPI_STATUS(AE_TYPE);
617         }
618
619         /* Perform per-object initialization */
620
621         switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
622         case ACPI_TYPE_BUFFER:
623
624                 /*
625                  * Defer evaluation of Buffer term_arg operand
626                  */
627                 obj_desc->buffer.node =
628                     ACPI_CAST_PTR(struct acpi_namespace_node,
629                                   walk_state->operands[0]);
630                 obj_desc->buffer.aml_start = op->named.data;
631                 obj_desc->buffer.aml_length = op->named.length;
632                 break;
633
634         case ACPI_TYPE_PACKAGE:
635
636                 /*
637                  * Defer evaluation of Package term_arg operand
638                  */
639                 obj_desc->package.node =
640                     ACPI_CAST_PTR(struct acpi_namespace_node,
641                                   walk_state->operands[0]);
642                 obj_desc->package.aml_start = op->named.data;
643                 obj_desc->package.aml_length = op->named.length;
644                 break;
645
646         case ACPI_TYPE_INTEGER:
647
648                 switch (op_info->type) {
649                 case AML_TYPE_CONSTANT:
650                         /*
651                          * Resolve AML Constants here - AND ONLY HERE!
652                          * All constants are integers.
653                          * We mark the integer with a flag that indicates that it started
654                          * life as a constant -- so that stores to constants will perform
655                          * as expected (noop). zero_op is used as a placeholder for optional
656                          * target operands.
657                          */
658                         obj_desc->common.flags = AOPOBJ_AML_CONSTANT;
659
660                         switch (opcode) {
661                         case AML_ZERO_OP:
662
663                                 obj_desc->integer.value = 0;
664                                 break;
665
666                         case AML_ONE_OP:
667
668                                 obj_desc->integer.value = 1;
669                                 break;
670
671                         case AML_ONES_OP:
672
673                                 obj_desc->integer.value = ACPI_INTEGER_MAX;
674
675                                 /* Truncate value if we are executing from a 32-bit ACPI table */
676
677 #ifndef ACPI_NO_METHOD_EXECUTION
678                                 acpi_ex_truncate_for32bit_table(obj_desc);
679 #endif
680                                 break;
681
682                         case AML_REVISION_OP:
683
684                                 obj_desc->integer.value = ACPI_CA_VERSION;
685                                 break;
686
687                         default:
688
689                                 ACPI_ERROR((AE_INFO,
690                                             "Unknown constant opcode %X",
691                                             opcode));
692                                 status = AE_AML_OPERAND_TYPE;
693                                 break;
694                         }
695                         break;
696
697                 case AML_TYPE_LITERAL:
698
699                         obj_desc->integer.value = op->common.value.integer;
700 #ifndef ACPI_NO_METHOD_EXECUTION
701                         acpi_ex_truncate_for32bit_table(obj_desc);
702 #endif
703                         break;
704
705                 default:
706                         ACPI_ERROR((AE_INFO, "Unknown Integer type %X",
707                                     op_info->type));
708                         status = AE_AML_OPERAND_TYPE;
709                         break;
710                 }
711                 break;
712
713         case ACPI_TYPE_STRING:
714
715                 obj_desc->string.pointer = op->common.value.string;
716                 obj_desc->string.length =
717                     (u32) ACPI_STRLEN(op->common.value.string);
718
719                 /*
720                  * The string is contained in the ACPI table, don't ever try
721                  * to delete it
722                  */
723                 obj_desc->common.flags |= AOPOBJ_STATIC_POINTER;
724                 break;
725
726         case ACPI_TYPE_METHOD:
727                 break;
728
729         case ACPI_TYPE_LOCAL_REFERENCE:
730
731                 switch (op_info->type) {
732                 case AML_TYPE_LOCAL_VARIABLE:
733
734                         /* Split the opcode into a base opcode + offset */
735
736                         obj_desc->reference.opcode = AML_LOCAL_OP;
737                         obj_desc->reference.offset = opcode - AML_LOCAL_OP;
738
739 #ifndef ACPI_NO_METHOD_EXECUTION
740                         status = acpi_ds_method_data_get_node(AML_LOCAL_OP,
741                                                               obj_desc->
742                                                               reference.offset,
743                                                               walk_state,
744                                                               (struct
745                                                                acpi_namespace_node
746                                                                **)&obj_desc->
747                                                               reference.object);
748 #endif
749                         break;
750
751                 case AML_TYPE_METHOD_ARGUMENT:
752
753                         /* Split the opcode into a base opcode + offset */
754
755                         obj_desc->reference.opcode = AML_ARG_OP;
756                         obj_desc->reference.offset = opcode - AML_ARG_OP;
757
758 #ifndef ACPI_NO_METHOD_EXECUTION
759                         status = acpi_ds_method_data_get_node(AML_ARG_OP,
760                                                               obj_desc->
761                                                               reference.offset,
762                                                               walk_state,
763                                                               (struct
764                                                                acpi_namespace_node
765                                                                **)&obj_desc->
766                                                               reference.object);
767 #endif
768                         break;
769
770                 default:        /* Other literals, etc.. */
771
772                         if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
773
774                                 /* Node was saved in Op */
775
776                                 obj_desc->reference.node = op->common.node;
777                                 obj_desc->reference.object =
778                                     op->common.node->object;
779                         }
780
781                         obj_desc->reference.opcode = opcode;
782                         break;
783                 }
784                 break;
785
786         default:
787
788                 ACPI_ERROR((AE_INFO, "Unimplemented data type: %X",
789                             ACPI_GET_OBJECT_TYPE(obj_desc)));
790
791                 status = AE_AML_OPERAND_TYPE;
792                 break;
793         }
794
795         return_ACPI_STATUS(status);
796 }