ACPICA: Update all ACPICA copyrights and signons to 2010
[linux-2.6.git] / drivers / acpi / acpica / exstore.c
1
2 /******************************************************************************
3  *
4  * Module Name: exstore - AML Interpreter object store support
5  *
6  *****************************************************************************/
7
8 /*
9  * Copyright (C) 2000 - 2010, Intel Corp.
10  * All rights reserved.
11  *
12  * Redistribution and use in source and binary forms, with or without
13  * modification, are permitted provided that the following conditions
14  * are met:
15  * 1. Redistributions of source code must retain the above copyright
16  *    notice, this list of conditions, and the following disclaimer,
17  *    without modification.
18  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
19  *    substantially similar to the "NO WARRANTY" disclaimer below
20  *    ("Disclaimer") and any redistribution must be conditioned upon
21  *    including a substantially similar Disclaimer requirement for further
22  *    binary redistribution.
23  * 3. Neither the names of the above-listed copyright holders nor the names
24  *    of any contributors may be used to endorse or promote products derived
25  *    from this software without specific prior written permission.
26  *
27  * Alternatively, this software may be distributed under the terms of the
28  * GNU General Public License ("GPL") version 2 as published by the Free
29  * Software Foundation.
30  *
31  * NO WARRANTY
32  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
35  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
36  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
41  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42  * POSSIBILITY OF SUCH DAMAGES.
43  */
44
45 #include <acpi/acpi.h>
46 #include "accommon.h"
47 #include "acdispat.h"
48 #include "acinterp.h"
49 #include "amlcode.h"
50 #include "acnamesp.h"
51
52 #define _COMPONENT          ACPI_EXECUTER
53 ACPI_MODULE_NAME("exstore")
54
55 /* Local prototypes */
56 static void
57 acpi_ex_do_debug_object(union acpi_operand_object *source_desc,
58                         u32 level, u32 index);
59
60 static acpi_status
61 acpi_ex_store_object_to_index(union acpi_operand_object *val_desc,
62                               union acpi_operand_object *dest_desc,
63                               struct acpi_walk_state *walk_state);
64
65 /*******************************************************************************
66  *
67  * FUNCTION:    acpi_ex_do_debug_object
68  *
69  * PARAMETERS:  source_desc         - Value to be stored
70  *              Level               - Indentation level (used for packages)
71  *              Index               - Current package element, zero if not pkg
72  *
73  * RETURN:      None
74  *
75  * DESCRIPTION: Handles stores to the Debug Object.
76  *
77  ******************************************************************************/
78
79 static void
80 acpi_ex_do_debug_object(union acpi_operand_object *source_desc,
81                         u32 level, u32 index)
82 {
83         u32 i;
84
85         ACPI_FUNCTION_TRACE_PTR(ex_do_debug_object, source_desc);
86
87         /* Print line header as long as we are not in the middle of an object display */
88
89         if (!((level > 0) && index == 0)) {
90                 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[ACPI Debug] %*s",
91                                       level, " "));
92         }
93
94         /* Display index for package output only */
95
96         if (index > 0) {
97                 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
98                                       "(%.2u) ", index - 1));
99         }
100
101         if (!source_desc) {
102                 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[Null Object]\n"));
103                 return_VOID;
104         }
105
106         if (ACPI_GET_DESCRIPTOR_TYPE(source_desc) == ACPI_DESC_TYPE_OPERAND) {
107                 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "%s ",
108                                       acpi_ut_get_object_type_name
109                                       (source_desc)));
110
111                 if (!acpi_ut_valid_internal_object(source_desc)) {
112                         ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
113                                               "%p, Invalid Internal Object!\n",
114                                               source_desc));
115                         return_VOID;
116                 }
117         } else if (ACPI_GET_DESCRIPTOR_TYPE(source_desc) ==
118                    ACPI_DESC_TYPE_NAMED) {
119                 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "%s: %p\n",
120                                       acpi_ut_get_type_name(((struct
121                                                               acpi_namespace_node
122                                                               *)source_desc)->
123                                                             type),
124                                       source_desc));
125                 return_VOID;
126         } else {
127                 return_VOID;
128         }
129
130         /* source_desc is of type ACPI_DESC_TYPE_OPERAND */
131
132         switch (source_desc->common.type) {
133         case ACPI_TYPE_INTEGER:
134
135                 /* Output correct integer width */
136
137                 if (acpi_gbl_integer_byte_width == 4) {
138                         ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "0x%8.8X\n",
139                                               (u32) source_desc->integer.
140                                               value));
141                 } else {
142                         ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
143                                               "0x%8.8X%8.8X\n",
144                                               ACPI_FORMAT_UINT64(source_desc->
145                                                                  integer.
146                                                                  value)));
147                 }
148                 break;
149
150         case ACPI_TYPE_BUFFER:
151
152                 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[0x%.2X]\n",
153                                       (u32) source_desc->buffer.length));
154                 ACPI_DUMP_BUFFER(source_desc->buffer.pointer,
155                                  (source_desc->buffer.length <
156                                   256) ? source_desc->buffer.length : 256);
157                 break;
158
159         case ACPI_TYPE_STRING:
160
161                 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[0x%.2X] \"%s\"\n",
162                                       source_desc->string.length,
163                                       source_desc->string.pointer));
164                 break;
165
166         case ACPI_TYPE_PACKAGE:
167
168                 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
169                                       "[Contains 0x%.2X Elements]\n",
170                                       source_desc->package.count));
171
172                 /* Output the entire contents of the package */
173
174                 for (i = 0; i < source_desc->package.count; i++) {
175                         acpi_ex_do_debug_object(source_desc->package.
176                                                 elements[i], level + 4, i + 1);
177                 }
178                 break;
179
180         case ACPI_TYPE_LOCAL_REFERENCE:
181
182                 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[%s] ",
183                                       acpi_ut_get_reference_name(source_desc)));
184
185                 /* Decode the reference */
186
187                 switch (source_desc->reference.class) {
188                 case ACPI_REFCLASS_INDEX:
189
190                         ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "0x%X\n",
191                                               source_desc->reference.value));
192                         break;
193
194                 case ACPI_REFCLASS_TABLE:
195
196                         /* Case for ddb_handle */
197
198                         ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
199                                               "Table Index 0x%X\n",
200                                               source_desc->reference.value));
201                         return;
202
203                 default:
204                         break;
205                 }
206
207                 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "  "));
208
209                 /* Check for valid node first, then valid object */
210
211                 if (source_desc->reference.node) {
212                         if (ACPI_GET_DESCRIPTOR_TYPE
213                             (source_desc->reference.node) !=
214                             ACPI_DESC_TYPE_NAMED) {
215                                 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
216                                                       " %p - Not a valid namespace node\n",
217                                                       source_desc->reference.
218                                                       node));
219                         } else {
220                                 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
221                                                       "Node %p [%4.4s] ",
222                                                       source_desc->reference.
223                                                       node,
224                                                       (source_desc->reference.
225                                                        node)->name.ascii));
226
227                                 switch ((source_desc->reference.node)->type) {
228
229                                         /* These types have no attached object */
230
231                                 case ACPI_TYPE_DEVICE:
232                                         acpi_os_printf("Device\n");
233                                         break;
234
235                                 case ACPI_TYPE_THERMAL:
236                                         acpi_os_printf("Thermal Zone\n");
237                                         break;
238
239                                 default:
240                                         acpi_ex_do_debug_object((source_desc->
241                                                                  reference.
242                                                                  node)->object,
243                                                                 level + 4, 0);
244                                         break;
245                                 }
246                         }
247                 } else if (source_desc->reference.object) {
248                         if (ACPI_GET_DESCRIPTOR_TYPE
249                             (source_desc->reference.object) ==
250                             ACPI_DESC_TYPE_NAMED) {
251                                 acpi_ex_do_debug_object(((struct
252                                                           acpi_namespace_node *)
253                                                          source_desc->reference.
254                                                          object)->object,
255                                                         level + 4, 0);
256                         } else {
257                                 acpi_ex_do_debug_object(source_desc->reference.
258                                                         object, level + 4, 0);
259                         }
260                 }
261                 break;
262
263         default:
264
265                 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "%p\n",
266                                       source_desc));
267                 break;
268         }
269
270         ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "\n"));
271         return_VOID;
272 }
273
274 /*******************************************************************************
275  *
276  * FUNCTION:    acpi_ex_store
277  *
278  * PARAMETERS:  *source_desc        - Value to be stored
279  *              *dest_desc          - Where to store it.  Must be an NS node
280  *                                    or a union acpi_operand_object of type
281  *                                    Reference;
282  *              walk_state          - Current walk state
283  *
284  * RETURN:      Status
285  *
286  * DESCRIPTION: Store the value described by source_desc into the location
287  *              described by dest_desc. Called by various interpreter
288  *              functions to store the result of an operation into
289  *              the destination operand -- not just simply the actual "Store"
290  *              ASL operator.
291  *
292  ******************************************************************************/
293
294 acpi_status
295 acpi_ex_store(union acpi_operand_object *source_desc,
296               union acpi_operand_object *dest_desc,
297               struct acpi_walk_state *walk_state)
298 {
299         acpi_status status = AE_OK;
300         union acpi_operand_object *ref_desc = dest_desc;
301
302         ACPI_FUNCTION_TRACE_PTR(ex_store, dest_desc);
303
304         /* Validate parameters */
305
306         if (!source_desc || !dest_desc) {
307                 ACPI_ERROR((AE_INFO, "Null parameter"));
308                 return_ACPI_STATUS(AE_AML_NO_OPERAND);
309         }
310
311         /* dest_desc can be either a namespace node or an ACPI object */
312
313         if (ACPI_GET_DESCRIPTOR_TYPE(dest_desc) == ACPI_DESC_TYPE_NAMED) {
314                 /*
315                  * Dest is a namespace node,
316                  * Storing an object into a Named node.
317                  */
318                 status = acpi_ex_store_object_to_node(source_desc,
319                                                       (struct
320                                                        acpi_namespace_node *)
321                                                       dest_desc, walk_state,
322                                                       ACPI_IMPLICIT_CONVERSION);
323
324                 return_ACPI_STATUS(status);
325         }
326
327         /* Destination object must be a Reference or a Constant object */
328
329         switch (dest_desc->common.type) {
330         case ACPI_TYPE_LOCAL_REFERENCE:
331                 break;
332
333         case ACPI_TYPE_INTEGER:
334
335                 /* Allow stores to Constants -- a Noop as per ACPI spec */
336
337                 if (dest_desc->common.flags & AOPOBJ_AML_CONSTANT) {
338                         return_ACPI_STATUS(AE_OK);
339                 }
340
341                 /*lint -fallthrough */
342
343         default:
344
345                 /* Destination is not a Reference object */
346
347                 ACPI_ERROR((AE_INFO,
348                             "Target is not a Reference or Constant object - %s [%p]",
349                             acpi_ut_get_object_type_name(dest_desc),
350                             dest_desc));
351
352                 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
353         }
354
355         /*
356          * Examine the Reference class. These cases are handled:
357          *
358          * 1) Store to Name (Change the object associated with a name)
359          * 2) Store to an indexed area of a Buffer or Package
360          * 3) Store to a Method Local or Arg
361          * 4) Store to the debug object
362          */
363         switch (ref_desc->reference.class) {
364         case ACPI_REFCLASS_REFOF:
365
366                 /* Storing an object into a Name "container" */
367
368                 status = acpi_ex_store_object_to_node(source_desc,
369                                                       ref_desc->reference.
370                                                       object, walk_state,
371                                                       ACPI_IMPLICIT_CONVERSION);
372                 break;
373
374         case ACPI_REFCLASS_INDEX:
375
376                 /* Storing to an Index (pointer into a packager or buffer) */
377
378                 status =
379                     acpi_ex_store_object_to_index(source_desc, ref_desc,
380                                                   walk_state);
381                 break;
382
383         case ACPI_REFCLASS_LOCAL:
384         case ACPI_REFCLASS_ARG:
385
386                 /* Store to a method local/arg  */
387
388                 status =
389                     acpi_ds_store_object_to_local(ref_desc->reference.class,
390                                                   ref_desc->reference.value,
391                                                   source_desc, walk_state);
392                 break;
393
394         case ACPI_REFCLASS_DEBUG:
395
396                 /*
397                  * Storing to the Debug object causes the value stored to be
398                  * displayed and otherwise has no effect -- see ACPI Specification
399                  */
400                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
401                                   "**** Write to Debug Object: Object %p %s ****:\n\n",
402                                   source_desc,
403                                   acpi_ut_get_object_type_name(source_desc)));
404
405                 acpi_ex_do_debug_object(source_desc, 0, 0);
406                 break;
407
408         default:
409
410                 ACPI_ERROR((AE_INFO, "Unknown Reference Class %2.2X",
411                             ref_desc->reference.class));
412                 ACPI_DUMP_ENTRY(ref_desc, ACPI_LV_INFO);
413
414                 status = AE_AML_INTERNAL;
415                 break;
416         }
417
418         return_ACPI_STATUS(status);
419 }
420
421 /*******************************************************************************
422  *
423  * FUNCTION:    acpi_ex_store_object_to_index
424  *
425  * PARAMETERS:  *source_desc            - Value to be stored
426  *              *dest_desc              - Named object to receive the value
427  *              walk_state              - Current walk state
428  *
429  * RETURN:      Status
430  *
431  * DESCRIPTION: Store the object to indexed Buffer or Package element
432  *
433  ******************************************************************************/
434
435 static acpi_status
436 acpi_ex_store_object_to_index(union acpi_operand_object *source_desc,
437                               union acpi_operand_object *index_desc,
438                               struct acpi_walk_state *walk_state)
439 {
440         acpi_status status = AE_OK;
441         union acpi_operand_object *obj_desc;
442         union acpi_operand_object *new_desc;
443         u8 value = 0;
444         u32 i;
445
446         ACPI_FUNCTION_TRACE(ex_store_object_to_index);
447
448         /*
449          * Destination must be a reference pointer, and
450          * must point to either a buffer or a package
451          */
452         switch (index_desc->reference.target_type) {
453         case ACPI_TYPE_PACKAGE:
454                 /*
455                  * Storing to a package element. Copy the object and replace
456                  * any existing object with the new object. No implicit
457                  * conversion is performed.
458                  *
459                  * The object at *(index_desc->Reference.Where) is the
460                  * element within the package that is to be modified.
461                  * The parent package object is at index_desc->Reference.Object
462                  */
463                 obj_desc = *(index_desc->reference.where);
464
465                 if (source_desc->common.type == ACPI_TYPE_LOCAL_REFERENCE &&
466                     source_desc->reference.class == ACPI_REFCLASS_TABLE) {
467
468                         /* This is a DDBHandle, just add a reference to it */
469
470                         acpi_ut_add_reference(source_desc);
471                         new_desc = source_desc;
472                 } else {
473                         /* Normal object, copy it */
474
475                         status =
476                             acpi_ut_copy_iobject_to_iobject(source_desc,
477                                                             &new_desc,
478                                                             walk_state);
479                         if (ACPI_FAILURE(status)) {
480                                 return_ACPI_STATUS(status);
481                         }
482                 }
483
484                 if (obj_desc) {
485
486                         /* Decrement reference count by the ref count of the parent package */
487
488                         for (i = 0; i < ((union acpi_operand_object *)
489                                          index_desc->reference.object)->common.
490                              reference_count; i++) {
491                                 acpi_ut_remove_reference(obj_desc);
492                         }
493                 }
494
495                 *(index_desc->reference.where) = new_desc;
496
497                 /* Increment ref count by the ref count of the parent package-1 */
498
499                 for (i = 1; i < ((union acpi_operand_object *)
500                                  index_desc->reference.object)->common.
501                      reference_count; i++) {
502                         acpi_ut_add_reference(new_desc);
503                 }
504
505                 break;
506
507         case ACPI_TYPE_BUFFER_FIELD:
508
509                 /*
510                  * Store into a Buffer or String (not actually a real buffer_field)
511                  * at a location defined by an Index.
512                  *
513                  * The first 8-bit element of the source object is written to the
514                  * 8-bit Buffer location defined by the Index destination object,
515                  * according to the ACPI 2.0 specification.
516                  */
517
518                 /*
519                  * Make sure the target is a Buffer or String. An error should
520                  * not happen here, since the reference_object was constructed
521                  * by the INDEX_OP code.
522                  */
523                 obj_desc = index_desc->reference.object;
524                 if ((obj_desc->common.type != ACPI_TYPE_BUFFER) &&
525                     (obj_desc->common.type != ACPI_TYPE_STRING)) {
526                         return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
527                 }
528
529                 /*
530                  * The assignment of the individual elements will be slightly
531                  * different for each source type.
532                  */
533                 switch (source_desc->common.type) {
534                 case ACPI_TYPE_INTEGER:
535
536                         /* Use the least-significant byte of the integer */
537
538                         value = (u8) (source_desc->integer.value);
539                         break;
540
541                 case ACPI_TYPE_BUFFER:
542                 case ACPI_TYPE_STRING:
543
544                         /* Note: Takes advantage of common string/buffer fields */
545
546                         value = source_desc->buffer.pointer[0];
547                         break;
548
549                 default:
550
551                         /* All other types are invalid */
552
553                         ACPI_ERROR((AE_INFO,
554                                     "Source must be Integer/Buffer/String type, not %s",
555                                     acpi_ut_get_object_type_name(source_desc)));
556                         return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
557                 }
558
559                 /* Store the source value into the target buffer byte */
560
561                 obj_desc->buffer.pointer[index_desc->reference.value] = value;
562                 break;
563
564         default:
565                 ACPI_ERROR((AE_INFO, "Target is not a Package or BufferField"));
566                 status = AE_AML_OPERAND_TYPE;
567                 break;
568         }
569
570         return_ACPI_STATUS(status);
571 }
572
573 /*******************************************************************************
574  *
575  * FUNCTION:    acpi_ex_store_object_to_node
576  *
577  * PARAMETERS:  source_desc             - Value to be stored
578  *              Node                    - Named object to receive the value
579  *              walk_state              - Current walk state
580  *              implicit_conversion     - Perform implicit conversion (yes/no)
581  *
582  * RETURN:      Status
583  *
584  * DESCRIPTION: Store the object to the named object.
585  *
586  *              The Assignment of an object to a named object is handled here
587  *              The value passed in will replace the current value (if any)
588  *              with the input value.
589  *
590  *              When storing into an object the data is converted to the
591  *              target object type then stored in the object.  This means
592  *              that the target object type (for an initialized target) will
593  *              not be changed by a store operation.
594  *
595  *              Assumes parameters are already validated.
596  *
597  ******************************************************************************/
598
599 acpi_status
600 acpi_ex_store_object_to_node(union acpi_operand_object *source_desc,
601                              struct acpi_namespace_node *node,
602                              struct acpi_walk_state *walk_state,
603                              u8 implicit_conversion)
604 {
605         acpi_status status = AE_OK;
606         union acpi_operand_object *target_desc;
607         union acpi_operand_object *new_desc;
608         acpi_object_type target_type;
609
610         ACPI_FUNCTION_TRACE_PTR(ex_store_object_to_node, source_desc);
611
612         /* Get current type of the node, and object attached to Node */
613
614         target_type = acpi_ns_get_type(node);
615         target_desc = acpi_ns_get_attached_object(node);
616
617         ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Storing %p(%s) into node %p(%s)\n",
618                           source_desc,
619                           acpi_ut_get_object_type_name(source_desc), node,
620                           acpi_ut_get_type_name(target_type)));
621
622         /*
623          * Resolve the source object to an actual value
624          * (If it is a reference object)
625          */
626         status = acpi_ex_resolve_object(&source_desc, target_type, walk_state);
627         if (ACPI_FAILURE(status)) {
628                 return_ACPI_STATUS(status);
629         }
630
631         /* If no implicit conversion, drop into the default case below */
632
633         if ((!implicit_conversion) ||
634             ((walk_state->opcode == AML_COPY_OP) &&
635              (target_type != ACPI_TYPE_LOCAL_REGION_FIELD) &&
636              (target_type != ACPI_TYPE_LOCAL_BANK_FIELD) &&
637              (target_type != ACPI_TYPE_LOCAL_INDEX_FIELD))) {
638                 /*
639                  * Force execution of default (no implicit conversion). Note:
640                  * copy_object does not perform an implicit conversion, as per the ACPI
641                  * spec -- except in case of region/bank/index fields -- because these
642                  * objects must retain their original type permanently.
643                  */
644                 target_type = ACPI_TYPE_ANY;
645         }
646
647         /* Do the actual store operation */
648
649         switch (target_type) {
650         case ACPI_TYPE_BUFFER_FIELD:
651         case ACPI_TYPE_LOCAL_REGION_FIELD:
652         case ACPI_TYPE_LOCAL_BANK_FIELD:
653         case ACPI_TYPE_LOCAL_INDEX_FIELD:
654
655                 /* For fields, copy the source data to the target field. */
656
657                 status = acpi_ex_write_data_to_field(source_desc, target_desc,
658                                                      &walk_state->result_obj);
659                 break;
660
661         case ACPI_TYPE_INTEGER:
662         case ACPI_TYPE_STRING:
663         case ACPI_TYPE_BUFFER:
664
665                 /*
666                  * These target types are all of type Integer/String/Buffer, and
667                  * therefore support implicit conversion before the store.
668                  *
669                  * Copy and/or convert the source object to a new target object
670                  */
671                 status =
672                     acpi_ex_store_object_to_object(source_desc, target_desc,
673                                                    &new_desc, walk_state);
674                 if (ACPI_FAILURE(status)) {
675                         return_ACPI_STATUS(status);
676                 }
677
678                 if (new_desc != target_desc) {
679                         /*
680                          * Store the new new_desc as the new value of the Name, and set
681                          * the Name's type to that of the value being stored in it.
682                          * source_desc reference count is incremented by attach_object.
683                          *
684                          * Note: This may change the type of the node if an explicit store
685                          * has been performed such that the node/object type has been
686                          * changed.
687                          */
688                         status =
689                             acpi_ns_attach_object(node, new_desc,
690                                                   new_desc->common.type);
691
692                         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
693                                           "Store %s into %s via Convert/Attach\n",
694                                           acpi_ut_get_object_type_name
695                                           (source_desc),
696                                           acpi_ut_get_object_type_name
697                                           (new_desc)));
698                 }
699                 break;
700
701         default:
702
703                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
704                                   "Storing %s (%p) directly into node (%p) with no implicit conversion\n",
705                                   acpi_ut_get_object_type_name(source_desc),
706                                   source_desc, node));
707
708                 /* No conversions for all other types.  Just attach the source object */
709
710                 status = acpi_ns_attach_object(node, source_desc,
711                                                source_desc->common.type);
712                 break;
713         }
714
715         return_ACPI_STATUS(status);
716 }