Revert "ARM: tegra: tegratab: dummy change"
[linux-2.6.git] / drivers / acpi / acpica / dsobject.c
1 /******************************************************************************
2  *
3  * Module Name: dsobject - Dispatcher object management routines
4  *
5  *****************************************************************************/
6
7 /*
8  * Copyright (C) 2000 - 2012, 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         acpi_object_type type;
85
86         ACPI_FUNCTION_TRACE(ds_build_internal_object);
87
88         *obj_desc_ptr = NULL;
89         if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
90                 /*
91                  * This is a named object reference. If this name was
92                  * previously looked up in the namespace, it was stored in this op.
93                  * Otherwise, go ahead and look it up now
94                  */
95                 if (!op->common.node) {
96                         status = acpi_ns_lookup(walk_state->scope_info,
97                                                 op->common.value.string,
98                                                 ACPI_TYPE_ANY,
99                                                 ACPI_IMODE_EXECUTE,
100                                                 ACPI_NS_SEARCH_PARENT |
101                                                 ACPI_NS_DONT_OPEN_SCOPE, NULL,
102                                                 ACPI_CAST_INDIRECT_PTR(struct
103                                                                        acpi_namespace_node,
104                                                                        &(op->
105                                                                          common.
106                                                                          node)));
107                         if (ACPI_FAILURE(status)) {
108
109                                 /* Check if we are resolving a named reference within a package */
110
111                                 if ((status == AE_NOT_FOUND)
112                                     && (acpi_gbl_enable_interpreter_slack)
113                                     &&
114                                     ((op->common.parent->common.aml_opcode ==
115                                       AML_PACKAGE_OP)
116                                      || (op->common.parent->common.aml_opcode ==
117                                          AML_VAR_PACKAGE_OP))) {
118                                         /*
119                                          * We didn't find the target and we are populating elements
120                                          * of a package - ignore if slack enabled. Some ASL code
121                                          * contains dangling invalid references in packages and
122                                          * expects that no exception will be issued. Leave the
123                                          * element as a null element. It cannot be used, but it
124                                          * can be overwritten by subsequent ASL code - this is
125                                          * typically the case.
126                                          */
127                                         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
128                                                           "Ignoring unresolved reference in package [%4.4s]\n",
129                                                           walk_state->
130                                                           scope_info->scope.
131                                                           node->name.ascii));
132
133                                         return_ACPI_STATUS(AE_OK);
134                                 } else {
135                                         ACPI_ERROR_NAMESPACE(op->common.value.
136                                                              string, status);
137                                 }
138
139                                 return_ACPI_STATUS(status);
140                         }
141                 }
142
143                 /* Special object resolution for elements of a package */
144
145                 if ((op->common.parent->common.aml_opcode == AML_PACKAGE_OP) ||
146                     (op->common.parent->common.aml_opcode ==
147                      AML_VAR_PACKAGE_OP)) {
148                         /*
149                          * Attempt to resolve the node to a value before we insert it into
150                          * the package. If this is a reference to a common data type,
151                          * resolve it immediately. According to the ACPI spec, package
152                          * elements can only be "data objects" or method references.
153                          * Attempt to resolve to an Integer, Buffer, String or Package.
154                          * If cannot, return the named reference (for things like Devices,
155                          * Methods, etc.) Buffer Fields and Fields will resolve to simple
156                          * objects (int/buf/str/pkg).
157                          *
158                          * NOTE: References to things like Devices, Methods, Mutexes, etc.
159                          * will remain as named references. This behavior is not described
160                          * in the ACPI spec, but it appears to be an oversight.
161                          */
162                         obj_desc =
163                             ACPI_CAST_PTR(union acpi_operand_object,
164                                           op->common.node);
165
166                         status =
167                             acpi_ex_resolve_node_to_value(ACPI_CAST_INDIRECT_PTR
168                                                           (struct
169                                                            acpi_namespace_node,
170                                                            &obj_desc),
171                                                           walk_state);
172                         if (ACPI_FAILURE(status)) {
173                                 return_ACPI_STATUS(status);
174                         }
175
176                         /*
177                          * Special handling for Alias objects. We need to setup the type
178                          * and the Op->Common.Node to point to the Alias target. Note,
179                          * Alias has at most one level of indirection internally.
180                          */
181                         type = op->common.node->type;
182                         if (type == ACPI_TYPE_LOCAL_ALIAS) {
183                                 type = obj_desc->common.type;
184                                 op->common.node =
185                                     ACPI_CAST_PTR(struct acpi_namespace_node,
186                                                   op->common.node->object);
187                         }
188
189                         switch (type) {
190                                 /*
191                                  * For these types, we need the actual node, not the subobject.
192                                  * However, the subobject did not get an extra reference count above.
193                                  *
194                                  * TBD: should ex_resolve_node_to_value be changed to fix this?
195                                  */
196                         case ACPI_TYPE_DEVICE:
197                         case ACPI_TYPE_THERMAL:
198
199                                 acpi_ut_add_reference(op->common.node->object);
200
201                                 /*lint -fallthrough */
202                                 /*
203                                  * For these types, we need the actual node, not the subobject.
204                                  * The subobject got an extra reference count in ex_resolve_node_to_value.
205                                  */
206                         case ACPI_TYPE_MUTEX:
207                         case ACPI_TYPE_METHOD:
208                         case ACPI_TYPE_POWER:
209                         case ACPI_TYPE_PROCESSOR:
210                         case ACPI_TYPE_EVENT:
211                         case ACPI_TYPE_REGION:
212
213                                 /* We will create a reference object for these types below */
214                                 break;
215
216                         default:
217                                 /*
218                                  * All other types - the node was resolved to an actual
219                                  * object, we are done.
220                                  */
221                                 goto exit;
222                         }
223                 }
224         }
225
226         /* Create and init a new internal ACPI object */
227
228         obj_desc = acpi_ut_create_internal_object((acpi_ps_get_opcode_info
229                                                    (op->common.aml_opcode))->
230                                                   object_type);
231         if (!obj_desc) {
232                 return_ACPI_STATUS(AE_NO_MEMORY);
233         }
234
235         status =
236             acpi_ds_init_object_from_op(walk_state, op, op->common.aml_opcode,
237                                         &obj_desc);
238         if (ACPI_FAILURE(status)) {
239                 acpi_ut_remove_reference(obj_desc);
240                 return_ACPI_STATUS(status);
241         }
242
243       exit:
244         *obj_desc_ptr = obj_desc;
245         return_ACPI_STATUS(status);
246 }
247
248 /*******************************************************************************
249  *
250  * FUNCTION:    acpi_ds_build_internal_buffer_obj
251  *
252  * PARAMETERS:  walk_state      - Current walk state
253  *              Op              - Parser object to be translated
254  *              buffer_length   - Length of the buffer
255  *              obj_desc_ptr    - Where the ACPI internal object is returned
256  *
257  * RETURN:      Status
258  *
259  * DESCRIPTION: Translate a parser Op package object to the equivalent
260  *              namespace object
261  *
262  ******************************************************************************/
263
264 acpi_status
265 acpi_ds_build_internal_buffer_obj(struct acpi_walk_state *walk_state,
266                                   union acpi_parse_object *op,
267                                   u32 buffer_length,
268                                   union acpi_operand_object **obj_desc_ptr)
269 {
270         union acpi_parse_object *arg;
271         union acpi_operand_object *obj_desc;
272         union acpi_parse_object *byte_list;
273         u32 byte_list_length = 0;
274
275         ACPI_FUNCTION_TRACE(ds_build_internal_buffer_obj);
276
277         /*
278          * If we are evaluating a Named buffer object "Name (xxxx, Buffer)".
279          * The buffer object already exists (from the NS node), otherwise it must
280          * be created.
281          */
282         obj_desc = *obj_desc_ptr;
283         if (!obj_desc) {
284
285                 /* Create a new buffer object */
286
287                 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER);
288                 *obj_desc_ptr = obj_desc;
289                 if (!obj_desc) {
290                         return_ACPI_STATUS(AE_NO_MEMORY);
291                 }
292         }
293
294         /*
295          * Second arg is the buffer data (optional) byte_list can be either
296          * individual bytes or a string initializer.  In either case, a
297          * byte_list appears in the AML.
298          */
299         arg = op->common.value.arg;     /* skip first arg */
300
301         byte_list = arg->named.next;
302         if (byte_list) {
303                 if (byte_list->common.aml_opcode != AML_INT_BYTELIST_OP) {
304                         ACPI_ERROR((AE_INFO,
305                                     "Expecting bytelist, found AML opcode 0x%X in op %p",
306                                     byte_list->common.aml_opcode, byte_list));
307
308                         acpi_ut_remove_reference(obj_desc);
309                         return (AE_TYPE);
310                 }
311
312                 byte_list_length = (u32) byte_list->common.value.integer;
313         }
314
315         /*
316          * The buffer length (number of bytes) will be the larger of:
317          * 1) The specified buffer length and
318          * 2) The length of the initializer byte list
319          */
320         obj_desc->buffer.length = buffer_length;
321         if (byte_list_length > buffer_length) {
322                 obj_desc->buffer.length = byte_list_length;
323         }
324
325         /* Allocate the buffer */
326
327         if (obj_desc->buffer.length == 0) {
328                 obj_desc->buffer.pointer = NULL;
329                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
330                                   "Buffer defined with zero length in AML, creating\n"));
331         } else {
332                 obj_desc->buffer.pointer =
333                     ACPI_ALLOCATE_ZEROED(obj_desc->buffer.length);
334                 if (!obj_desc->buffer.pointer) {
335                         acpi_ut_delete_object_desc(obj_desc);
336                         return_ACPI_STATUS(AE_NO_MEMORY);
337                 }
338
339                 /* Initialize buffer from the byte_list (if present) */
340
341                 if (byte_list) {
342                         ACPI_MEMCPY(obj_desc->buffer.pointer,
343                                     byte_list->named.data, byte_list_length);
344                 }
345         }
346
347         obj_desc->buffer.flags |= AOPOBJ_DATA_VALID;
348         op->common.node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_desc);
349         return_ACPI_STATUS(AE_OK);
350 }
351
352 /*******************************************************************************
353  *
354  * FUNCTION:    acpi_ds_build_internal_package_obj
355  *
356  * PARAMETERS:  walk_state      - Current walk state
357  *              Op              - Parser object to be translated
358  *              element_count   - Number of elements in the package - this is
359  *                                the num_elements argument to Package()
360  *              obj_desc_ptr    - Where the ACPI internal object is returned
361  *
362  * RETURN:      Status
363  *
364  * DESCRIPTION: Translate a parser Op package object to the equivalent
365  *              namespace object
366  *
367  * NOTE: The number of elements in the package will be always be the num_elements
368  * count, regardless of the number of elements in the package list. If
369  * num_elements is smaller, only that many package list elements are used.
370  * if num_elements is larger, the Package object is padded out with
371  * objects of type Uninitialized (as per ACPI spec.)
372  *
373  * Even though the ASL compilers do not allow num_elements to be smaller
374  * than the Package list length (for the fixed length package opcode), some
375  * BIOS code modifies the AML on the fly to adjust the num_elements, and
376  * this code compensates for that. This also provides compatibility with
377  * other AML interpreters.
378  *
379  ******************************************************************************/
380
381 acpi_status
382 acpi_ds_build_internal_package_obj(struct acpi_walk_state *walk_state,
383                                    union acpi_parse_object *op,
384                                    u32 element_count,
385                                    union acpi_operand_object **obj_desc_ptr)
386 {
387         union acpi_parse_object *arg;
388         union acpi_parse_object *parent;
389         union acpi_operand_object *obj_desc = NULL;
390         acpi_status status = AE_OK;
391         unsigned i;
392         u16 index;
393         u16 reference_count;
394
395         ACPI_FUNCTION_TRACE(ds_build_internal_package_obj);
396
397         /* Find the parent of a possibly nested package */
398
399         parent = op->common.parent;
400         while ((parent->common.aml_opcode == AML_PACKAGE_OP) ||
401                (parent->common.aml_opcode == AML_VAR_PACKAGE_OP)) {
402                 parent = parent->common.parent;
403         }
404
405         /*
406          * If we are evaluating a Named package object "Name (xxxx, Package)",
407          * the package object already exists, otherwise it must be created.
408          */
409         obj_desc = *obj_desc_ptr;
410         if (!obj_desc) {
411                 obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_PACKAGE);
412                 *obj_desc_ptr = obj_desc;
413                 if (!obj_desc) {
414                         return_ACPI_STATUS(AE_NO_MEMORY);
415                 }
416
417                 obj_desc->package.node = parent->common.node;
418         }
419
420         /*
421          * Allocate the element array (array of pointers to the individual
422          * objects) based on the num_elements parameter. Add an extra pointer slot
423          * so that the list is always null terminated.
424          */
425         obj_desc->package.elements = ACPI_ALLOCATE_ZEROED(((acpi_size)
426                                                            element_count +
427                                                            1) * sizeof(void *));
428
429         if (!obj_desc->package.elements) {
430                 acpi_ut_delete_object_desc(obj_desc);
431                 return_ACPI_STATUS(AE_NO_MEMORY);
432         }
433
434         obj_desc->package.count = element_count;
435
436         /*
437          * Initialize the elements of the package, up to the num_elements count.
438          * Package is automatically padded with uninitialized (NULL) elements
439          * if num_elements is greater than the package list length. Likewise,
440          * Package is truncated if num_elements is less than the list length.
441          */
442         arg = op->common.value.arg;
443         arg = arg->common.next;
444         for (i = 0; arg && (i < element_count); i++) {
445                 if (arg->common.aml_opcode == AML_INT_RETURN_VALUE_OP) {
446                         if (arg->common.node->type == ACPI_TYPE_METHOD) {
447                                 /*
448                                  * A method reference "looks" to the parser to be a method
449                                  * invocation, so we special case it here
450                                  */
451                                 arg->common.aml_opcode = AML_INT_NAMEPATH_OP;
452                                 status =
453                                     acpi_ds_build_internal_object(walk_state,
454                                                                   arg,
455                                                                   &obj_desc->
456                                                                   package.
457                                                                   elements[i]);
458                         } else {
459                                 /* This package element is already built, just get it */
460
461                                 obj_desc->package.elements[i] =
462                                     ACPI_CAST_PTR(union acpi_operand_object,
463                                                   arg->common.node);
464                         }
465                 } else {
466                         status = acpi_ds_build_internal_object(walk_state, arg,
467                                                                &obj_desc->
468                                                                package.
469                                                                elements[i]);
470                 }
471
472                 if (*obj_desc_ptr) {
473
474                         /* Existing package, get existing reference count */
475
476                         reference_count =
477                             (*obj_desc_ptr)->common.reference_count;
478                         if (reference_count > 1) {
479
480                                 /* Make new element ref count match original ref count */
481
482                                 for (index = 0; index < (reference_count - 1);
483                                      index++) {
484                                         acpi_ut_add_reference((obj_desc->
485                                                                package.
486                                                                elements[i]));
487                                 }
488                         }
489                 }
490
491                 arg = arg->common.next;
492         }
493
494         /* Check for match between num_elements and actual length of package_list */
495
496         if (arg) {
497                 /*
498                  * num_elements was exhausted, but there are remaining elements in the
499                  * package_list. Truncate the package to num_elements.
500                  *
501                  * Note: technically, this is an error, from ACPI spec: "It is an error
502                  * for NumElements to be less than the number of elements in the
503                  * PackageList". However, we just print a message and
504                  * no exception is returned. This provides Windows compatibility. Some
505                  * BIOSs will alter the num_elements on the fly, creating this type
506                  * of ill-formed package object.
507                  */
508                 while (arg) {
509                         /*
510                          * We must delete any package elements that were created earlier
511                          * and are not going to be used because of the package truncation.
512                          */
513                         if (arg->common.node) {
514                                 acpi_ut_remove_reference(ACPI_CAST_PTR
515                                                          (union
516                                                           acpi_operand_object,
517                                                           arg->common.node));
518                                 arg->common.node = NULL;
519                         }
520
521                         /* Find out how many elements there really are */
522
523                         i++;
524                         arg = arg->common.next;
525                 }
526
527                 ACPI_INFO((AE_INFO,
528                            "Actual Package length (%u) is larger than NumElements field (%u), truncated\n",
529                            i, element_count));
530         } else if (i < element_count) {
531                 /*
532                  * Arg list (elements) was exhausted, but we did not reach num_elements count.
533                  * Note: this is not an error, the package is padded out with NULLs.
534                  */
535                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
536                                   "Package List length (%u) smaller than NumElements count (%u), padded with null elements\n",
537                                   i, element_count));
538         }
539
540         obj_desc->package.flags |= AOPOBJ_DATA_VALID;
541         op->common.node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_desc);
542         return_ACPI_STATUS(status);
543 }
544
545 /*******************************************************************************
546  *
547  * FUNCTION:    acpi_ds_create_node
548  *
549  * PARAMETERS:  walk_state      - Current walk state
550  *              Node            - NS Node to be initialized
551  *              Op              - Parser object to be translated
552  *
553  * RETURN:      Status
554  *
555  * DESCRIPTION: Create the object to be associated with a namespace node
556  *
557  ******************************************************************************/
558
559 acpi_status
560 acpi_ds_create_node(struct acpi_walk_state *walk_state,
561                     struct acpi_namespace_node *node,
562                     union acpi_parse_object *op)
563 {
564         acpi_status status;
565         union acpi_operand_object *obj_desc;
566
567         ACPI_FUNCTION_TRACE_PTR(ds_create_node, op);
568
569         /*
570          * Because of the execution pass through the non-control-method
571          * parts of the table, we can arrive here twice.  Only init
572          * the named object node the first time through
573          */
574         if (acpi_ns_get_attached_object(node)) {
575                 return_ACPI_STATUS(AE_OK);
576         }
577
578         if (!op->common.value.arg) {
579
580                 /* No arguments, there is nothing to do */
581
582                 return_ACPI_STATUS(AE_OK);
583         }
584
585         /* Build an internal object for the argument(s) */
586
587         status = acpi_ds_build_internal_object(walk_state, op->common.value.arg,
588                                                &obj_desc);
589         if (ACPI_FAILURE(status)) {
590                 return_ACPI_STATUS(status);
591         }
592
593         /* Re-type the object according to its argument */
594
595         node->type = obj_desc->common.type;
596
597         /* Attach obj to node */
598
599         status = acpi_ns_attach_object(node, obj_desc, node->type);
600
601         /* Remove local reference to the object */
602
603         acpi_ut_remove_reference(obj_desc);
604         return_ACPI_STATUS(status);
605 }
606
607 #endif                          /* ACPI_NO_METHOD_EXECUTION */
608
609 /*******************************************************************************
610  *
611  * FUNCTION:    acpi_ds_init_object_from_op
612  *
613  * PARAMETERS:  walk_state      - Current walk state
614  *              Op              - Parser op used to init the internal object
615  *              Opcode          - AML opcode associated with the object
616  *              ret_obj_desc    - Namespace object to be initialized
617  *
618  * RETURN:      Status
619  *
620  * DESCRIPTION: Initialize a namespace object from a parser Op and its
621  *              associated arguments.  The namespace object is a more compact
622  *              representation of the Op and its arguments.
623  *
624  ******************************************************************************/
625
626 acpi_status
627 acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state,
628                             union acpi_parse_object *op,
629                             u16 opcode,
630                             union acpi_operand_object **ret_obj_desc)
631 {
632         const struct acpi_opcode_info *op_info;
633         union acpi_operand_object *obj_desc;
634         acpi_status status = AE_OK;
635
636         ACPI_FUNCTION_TRACE(ds_init_object_from_op);
637
638         obj_desc = *ret_obj_desc;
639         op_info = acpi_ps_get_opcode_info(opcode);
640         if (op_info->class == AML_CLASS_UNKNOWN) {
641
642                 /* Unknown opcode */
643
644                 return_ACPI_STATUS(AE_TYPE);
645         }
646
647         /* Perform per-object initialization */
648
649         switch (obj_desc->common.type) {
650         case ACPI_TYPE_BUFFER:
651
652                 /*
653                  * Defer evaluation of Buffer term_arg operand
654                  */
655                 obj_desc->buffer.node =
656                     ACPI_CAST_PTR(struct acpi_namespace_node,
657                                   walk_state->operands[0]);
658                 obj_desc->buffer.aml_start = op->named.data;
659                 obj_desc->buffer.aml_length = op->named.length;
660                 break;
661
662         case ACPI_TYPE_PACKAGE:
663
664                 /*
665                  * Defer evaluation of Package term_arg operand
666                  */
667                 obj_desc->package.node =
668                     ACPI_CAST_PTR(struct acpi_namespace_node,
669                                   walk_state->operands[0]);
670                 obj_desc->package.aml_start = op->named.data;
671                 obj_desc->package.aml_length = op->named.length;
672                 break;
673
674         case ACPI_TYPE_INTEGER:
675
676                 switch (op_info->type) {
677                 case AML_TYPE_CONSTANT:
678                         /*
679                          * Resolve AML Constants here - AND ONLY HERE!
680                          * All constants are integers.
681                          * We mark the integer with a flag that indicates that it started
682                          * life as a constant -- so that stores to constants will perform
683                          * as expected (noop). zero_op is used as a placeholder for optional
684                          * target operands.
685                          */
686                         obj_desc->common.flags = AOPOBJ_AML_CONSTANT;
687
688                         switch (opcode) {
689                         case AML_ZERO_OP:
690
691                                 obj_desc->integer.value = 0;
692                                 break;
693
694                         case AML_ONE_OP:
695
696                                 obj_desc->integer.value = 1;
697                                 break;
698
699                         case AML_ONES_OP:
700
701                                 obj_desc->integer.value = ACPI_UINT64_MAX;
702
703                                 /* Truncate value if we are executing from a 32-bit ACPI table */
704
705 #ifndef ACPI_NO_METHOD_EXECUTION
706                                 acpi_ex_truncate_for32bit_table(obj_desc);
707 #endif
708                                 break;
709
710                         case AML_REVISION_OP:
711
712                                 obj_desc->integer.value = ACPI_CA_VERSION;
713                                 break;
714
715                         default:
716
717                                 ACPI_ERROR((AE_INFO,
718                                             "Unknown constant opcode 0x%X",
719                                             opcode));
720                                 status = AE_AML_OPERAND_TYPE;
721                                 break;
722                         }
723                         break;
724
725                 case AML_TYPE_LITERAL:
726
727                         obj_desc->integer.value = op->common.value.integer;
728 #ifndef ACPI_NO_METHOD_EXECUTION
729                         acpi_ex_truncate_for32bit_table(obj_desc);
730 #endif
731                         break;
732
733                 default:
734                         ACPI_ERROR((AE_INFO, "Unknown Integer type 0x%X",
735                                     op_info->type));
736                         status = AE_AML_OPERAND_TYPE;
737                         break;
738                 }
739                 break;
740
741         case ACPI_TYPE_STRING:
742
743                 obj_desc->string.pointer = op->common.value.string;
744                 obj_desc->string.length =
745                     (u32) ACPI_STRLEN(op->common.value.string);
746
747                 /*
748                  * The string is contained in the ACPI table, don't ever try
749                  * to delete it
750                  */
751                 obj_desc->common.flags |= AOPOBJ_STATIC_POINTER;
752                 break;
753
754         case ACPI_TYPE_METHOD:
755                 break;
756
757         case ACPI_TYPE_LOCAL_REFERENCE:
758
759                 switch (op_info->type) {
760                 case AML_TYPE_LOCAL_VARIABLE:
761
762                         /* Local ID (0-7) is (AML opcode - base AML_LOCAL_OP) */
763
764                         obj_desc->reference.value =
765                             ((u32)opcode) - AML_LOCAL_OP;
766                         obj_desc->reference.class = ACPI_REFCLASS_LOCAL;
767
768 #ifndef ACPI_NO_METHOD_EXECUTION
769                         status =
770                             acpi_ds_method_data_get_node(ACPI_REFCLASS_LOCAL,
771                                                          obj_desc->reference.
772                                                          value, walk_state,
773                                                          ACPI_CAST_INDIRECT_PTR
774                                                          (struct
775                                                           acpi_namespace_node,
776                                                           &obj_desc->reference.
777                                                           object));
778 #endif
779                         break;
780
781                 case AML_TYPE_METHOD_ARGUMENT:
782
783                         /* Arg ID (0-6) is (AML opcode - base AML_ARG_OP) */
784
785                         obj_desc->reference.value = ((u32)opcode) - AML_ARG_OP;
786                         obj_desc->reference.class = ACPI_REFCLASS_ARG;
787
788 #ifndef ACPI_NO_METHOD_EXECUTION
789                         status = acpi_ds_method_data_get_node(ACPI_REFCLASS_ARG,
790                                                               obj_desc->
791                                                               reference.value,
792                                                               walk_state,
793                                                               ACPI_CAST_INDIRECT_PTR
794                                                               (struct
795                                                                acpi_namespace_node,
796                                                                &obj_desc->
797                                                                reference.
798                                                                object));
799 #endif
800                         break;
801
802                 default:        /* Object name or Debug object */
803
804                         switch (op->common.aml_opcode) {
805                         case AML_INT_NAMEPATH_OP:
806
807                                 /* Node was saved in Op */
808
809                                 obj_desc->reference.node = op->common.node;
810                                 obj_desc->reference.object =
811                                     op->common.node->object;
812                                 obj_desc->reference.class = ACPI_REFCLASS_NAME;
813                                 break;
814
815                         case AML_DEBUG_OP:
816
817                                 obj_desc->reference.class = ACPI_REFCLASS_DEBUG;
818                                 break;
819
820                         default:
821
822                                 ACPI_ERROR((AE_INFO,
823                                             "Unimplemented reference type for AML opcode: 0x%4.4X",
824                                             opcode));
825                                 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
826                         }
827                         break;
828                 }
829                 break;
830
831         default:
832
833                 ACPI_ERROR((AE_INFO, "Unimplemented data type: 0x%X",
834                             obj_desc->common.type));
835
836                 status = AE_AML_OPERAND_TYPE;
837                 break;
838         }
839
840         return_ACPI_STATUS(status);
841 }