ACPICA: Update behavior of CopyObject to match ACPI spec
[linux-2.6.git] / drivers / acpi / executer / exstore.c
1
2 /******************************************************************************
3  *
4  * Module Name: exstore - AML Interpreter object store support
5  *
6  *****************************************************************************/
7
8 /*
9  * Copyright (C) 2000 - 2007, R. Byron Moore
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 <acpi/acdispat.h>
47 #include <acpi/acinterp.h>
48 #include <acpi/amlcode.h>
49 #include <acpi/acnamesp.h>
50 #include <acpi/acparser.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         ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[ACPI Debug] %*s",
88                               level, " "));
89
90         /* Display index for package output only */
91
92         if (index > 0) {
93                 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
94                                       "(%.2u) ", index - 1));
95         }
96
97         if (!source_desc) {
98                 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "<Null Object>\n"));
99                 return_VOID;
100         }
101
102         if (ACPI_GET_DESCRIPTOR_TYPE(source_desc) == ACPI_DESC_TYPE_OPERAND) {
103                 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "%s: ",
104                                       acpi_ut_get_object_type_name
105                                       (source_desc)));
106
107                 if (!acpi_ut_valid_internal_object(source_desc)) {
108                         ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
109                                               "%p, Invalid Internal Object!\n",
110                                               source_desc));
111                         return_VOID;
112                 }
113         } else if (ACPI_GET_DESCRIPTOR_TYPE(source_desc) ==
114                    ACPI_DESC_TYPE_NAMED) {
115                 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "%s: %p\n",
116                                       acpi_ut_get_type_name(((struct
117                                                               acpi_namespace_node
118                                                               *)source_desc)->
119                                                             type),
120                                       source_desc));
121                 return_VOID;
122         } else {
123                 return_VOID;
124         }
125
126         /* source_desc is of type ACPI_DESC_TYPE_OPERAND */
127
128         switch (ACPI_GET_OBJECT_TYPE(source_desc)) {
129         case ACPI_TYPE_INTEGER:
130
131                 /* Output correct integer width */
132
133                 if (acpi_gbl_integer_byte_width == 4) {
134                         ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "0x%8.8X\n",
135                                               (u32) source_desc->integer.
136                                               value));
137                 } else {
138                         ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
139                                               "0x%8.8X%8.8X\n",
140                                               ACPI_FORMAT_UINT64(source_desc->
141                                                                  integer.
142                                                                  value)));
143                 }
144                 break;
145
146         case ACPI_TYPE_BUFFER:
147
148                 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[0x%.2X]\n",
149                                       (u32) source_desc->buffer.length));
150                 ACPI_DUMP_BUFFER(source_desc->buffer.pointer,
151                                  (source_desc->buffer.length <
152                                   256) ? source_desc->buffer.length : 256);
153                 break;
154
155         case ACPI_TYPE_STRING:
156
157                 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[0x%.2X] \"%s\"\n",
158                                       source_desc->string.length,
159                                       source_desc->string.pointer));
160                 break;
161
162         case ACPI_TYPE_PACKAGE:
163
164                 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
165                                       "[0x%.2X Elements]\n",
166                                       source_desc->package.count));
167
168                 /* Output the entire contents of the package */
169
170                 for (i = 0; i < source_desc->package.count; i++) {
171                         acpi_ex_do_debug_object(source_desc->package.
172                                                 elements[i], level + 4, i + 1);
173                 }
174                 break;
175
176         case ACPI_TYPE_LOCAL_REFERENCE:
177
178                 if (source_desc->reference.opcode == AML_INDEX_OP) {
179                         ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
180                                               "[%s, 0x%X]\n",
181                                               acpi_ps_get_opcode_name
182                                               (source_desc->reference.opcode),
183                                               source_desc->reference.offset));
184                 } else {
185                         ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[%s]",
186                                               acpi_ps_get_opcode_name
187                                               (source_desc->reference.opcode)));
188                 }
189
190                 if (source_desc->reference.opcode == AML_LOAD_OP) {     /* Load and load_table */
191                         ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT,
192                                               " Table OwnerId %p\n",
193                                               source_desc->reference.object));
194                         break;
195                 }
196
197                 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "\n"));
198                 if (source_desc->reference.object) {
199                         if (ACPI_GET_DESCRIPTOR_TYPE
200                             (source_desc->reference.object) ==
201                             ACPI_DESC_TYPE_NAMED) {
202                                 acpi_ex_do_debug_object(((struct
203                                                           acpi_namespace_node *)
204                                                          source_desc->reference.
205                                                          object)->object,
206                                                         level + 4, 0);
207                         } else {
208                                 acpi_ex_do_debug_object(source_desc->reference.
209                                                         object, level + 4, 0);
210                         }
211                 } else 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_ex_do_debug_object((source_desc->reference.
221                                                          node)->object,
222                                                         level + 4, 0);
223                         }
224                 }
225                 break;
226
227         default:
228
229                 ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "%p %s\n",
230                                       source_desc,
231                                       acpi_ut_get_object_type_name
232                                       (source_desc)));
233                 break;
234         }
235
236         ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "\n"));
237         return_VOID;
238 }
239
240 /*******************************************************************************
241  *
242  * FUNCTION:    acpi_ex_store
243  *
244  * PARAMETERS:  *source_desc        - Value to be stored
245  *              *dest_desc          - Where to store it.  Must be an NS node
246  *                                    or an union acpi_operand_object of type
247  *                                    Reference;
248  *              walk_state          - Current walk state
249  *
250  * RETURN:      Status
251  *
252  * DESCRIPTION: Store the value described by source_desc into the location
253  *              described by dest_desc. Called by various interpreter
254  *              functions to store the result of an operation into
255  *              the destination operand -- not just simply the actual "Store"
256  *              ASL operator.
257  *
258  ******************************************************************************/
259
260 acpi_status
261 acpi_ex_store(union acpi_operand_object *source_desc,
262               union acpi_operand_object *dest_desc,
263               struct acpi_walk_state *walk_state)
264 {
265         acpi_status status = AE_OK;
266         union acpi_operand_object *ref_desc = dest_desc;
267
268         ACPI_FUNCTION_TRACE_PTR(ex_store, dest_desc);
269
270         /* Validate parameters */
271
272         if (!source_desc || !dest_desc) {
273                 ACPI_ERROR((AE_INFO, "Null parameter"));
274                 return_ACPI_STATUS(AE_AML_NO_OPERAND);
275         }
276
277         /* dest_desc can be either a namespace node or an ACPI object */
278
279         if (ACPI_GET_DESCRIPTOR_TYPE(dest_desc) == ACPI_DESC_TYPE_NAMED) {
280                 /*
281                  * Dest is a namespace node,
282                  * Storing an object into a Named node.
283                  */
284                 status = acpi_ex_store_object_to_node(source_desc,
285                                                       (struct
286                                                        acpi_namespace_node *)
287                                                       dest_desc, walk_state,
288                                                       ACPI_IMPLICIT_CONVERSION);
289
290                 return_ACPI_STATUS(status);
291         }
292
293         /* Destination object must be a Reference or a Constant object */
294
295         switch (ACPI_GET_OBJECT_TYPE(dest_desc)) {
296         case ACPI_TYPE_LOCAL_REFERENCE:
297                 break;
298
299         case ACPI_TYPE_INTEGER:
300
301                 /* Allow stores to Constants -- a Noop as per ACPI spec */
302
303                 if (dest_desc->common.flags & AOPOBJ_AML_CONSTANT) {
304                         return_ACPI_STATUS(AE_OK);
305                 }
306
307                 /*lint -fallthrough */
308
309         default:
310
311                 /* Destination is not a Reference object */
312
313                 ACPI_ERROR((AE_INFO,
314                             "Target is not a Reference or Constant object - %s [%p]",
315                             acpi_ut_get_object_type_name(dest_desc),
316                             dest_desc));
317
318                 ACPI_DUMP_STACK_ENTRY(source_desc);
319                 ACPI_DUMP_STACK_ENTRY(dest_desc);
320                 ACPI_DUMP_OPERANDS(&dest_desc, ACPI_IMODE_EXECUTE, "ExStore",
321                                    2,
322                                    "Target is not a Reference or Constant object");
323
324                 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
325         }
326
327         /*
328          * Examine the Reference opcode.  These cases are handled:
329          *
330          * 1) Store to Name (Change the object associated with a name)
331          * 2) Store to an indexed area of a Buffer or Package
332          * 3) Store to a Method Local or Arg
333          * 4) Store to the debug object
334          */
335         switch (ref_desc->reference.opcode) {
336         case AML_REF_OF_OP:
337
338                 /* Storing an object into a Name "container" */
339
340                 status = acpi_ex_store_object_to_node(source_desc,
341                                                       ref_desc->reference.
342                                                       object, walk_state,
343                                                       ACPI_IMPLICIT_CONVERSION);
344                 break;
345
346         case AML_INDEX_OP:
347
348                 /* Storing to an Index (pointer into a packager or buffer) */
349
350                 status =
351                     acpi_ex_store_object_to_index(source_desc, ref_desc,
352                                                   walk_state);
353                 break;
354
355         case AML_LOCAL_OP:
356         case AML_ARG_OP:
357
358                 /* Store to a method local/arg  */
359
360                 status =
361                     acpi_ds_store_object_to_local(ref_desc->reference.opcode,
362                                                   ref_desc->reference.offset,
363                                                   source_desc, walk_state);
364                 break;
365
366         case AML_DEBUG_OP:
367
368                 /*
369                  * Storing to the Debug object causes the value stored to be
370                  * displayed and otherwise has no effect -- see ACPI Specification
371                  */
372                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
373                                   "**** Write to Debug Object: Object %p %s ****:\n\n",
374                                   source_desc,
375                                   acpi_ut_get_object_type_name(source_desc)));
376
377                 acpi_ex_do_debug_object(source_desc, 0, 0);
378                 break;
379
380         default:
381
382                 ACPI_ERROR((AE_INFO, "Unknown Reference opcode %X",
383                             ref_desc->reference.opcode));
384                 ACPI_DUMP_ENTRY(ref_desc, ACPI_LV_ERROR);
385
386                 status = AE_AML_INTERNAL;
387                 break;
388         }
389
390         return_ACPI_STATUS(status);
391 }
392
393 /*******************************************************************************
394  *
395  * FUNCTION:    acpi_ex_store_object_to_index
396  *
397  * PARAMETERS:  *source_desc            - Value to be stored
398  *              *dest_desc              - Named object to receive the value
399  *              walk_state              - Current walk state
400  *
401  * RETURN:      Status
402  *
403  * DESCRIPTION: Store the object to indexed Buffer or Package element
404  *
405  ******************************************************************************/
406
407 static acpi_status
408 acpi_ex_store_object_to_index(union acpi_operand_object *source_desc,
409                               union acpi_operand_object *index_desc,
410                               struct acpi_walk_state *walk_state)
411 {
412         acpi_status status = AE_OK;
413         union acpi_operand_object *obj_desc;
414         union acpi_operand_object *new_desc;
415         u8 value = 0;
416         u32 i;
417
418         ACPI_FUNCTION_TRACE(ex_store_object_to_index);
419
420         /*
421          * Destination must be a reference pointer, and
422          * must point to either a buffer or a package
423          */
424         switch (index_desc->reference.target_type) {
425         case ACPI_TYPE_PACKAGE:
426                 /*
427                  * Storing to a package element. Copy the object and replace
428                  * any existing object with the new object. No implicit
429                  * conversion is performed.
430                  *
431                  * The object at *(index_desc->Reference.Where) is the
432                  * element within the package that is to be modified.
433                  * The parent package object is at index_desc->Reference.Object
434                  */
435                 obj_desc = *(index_desc->reference.where);
436
437                 if (ACPI_GET_OBJECT_TYPE(source_desc) ==
438                     ACPI_TYPE_LOCAL_REFERENCE
439                     && source_desc->reference.opcode == AML_LOAD_OP) {
440
441                         /* This is a DDBHandle, just add a reference to it */
442
443                         acpi_ut_add_reference(source_desc);
444                         new_desc = source_desc;
445                 } else {
446                         /* Normal object, copy it */
447
448                         status =
449                             acpi_ut_copy_iobject_to_iobject(source_desc,
450                                                             &new_desc,
451                                                             walk_state);
452                         if (ACPI_FAILURE(status)) {
453                                 return_ACPI_STATUS(status);
454                         }
455                 }
456
457                 if (obj_desc) {
458
459                         /* Decrement reference count by the ref count of the parent package */
460
461                         for (i = 0; i < ((union acpi_operand_object *)
462                                          index_desc->reference.object)->common.
463                              reference_count; i++) {
464                                 acpi_ut_remove_reference(obj_desc);
465                         }
466                 }
467
468                 *(index_desc->reference.where) = new_desc;
469
470                 /* Increment ref count by the ref count of the parent package-1 */
471
472                 for (i = 1; i < ((union acpi_operand_object *)
473                                  index_desc->reference.object)->common.
474                      reference_count; i++) {
475                         acpi_ut_add_reference(new_desc);
476                 }
477
478                 break;
479
480         case ACPI_TYPE_BUFFER_FIELD:
481
482                 /*
483                  * Store into a Buffer or String (not actually a real buffer_field)
484                  * at a location defined by an Index.
485                  *
486                  * The first 8-bit element of the source object is written to the
487                  * 8-bit Buffer location defined by the Index destination object,
488                  * according to the ACPI 2.0 specification.
489                  */
490
491                 /*
492                  * Make sure the target is a Buffer or String. An error should
493                  * not happen here, since the reference_object was constructed
494                  * by the INDEX_OP code.
495                  */
496                 obj_desc = index_desc->reference.object;
497                 if ((ACPI_GET_OBJECT_TYPE(obj_desc) != ACPI_TYPE_BUFFER) &&
498                     (ACPI_GET_OBJECT_TYPE(obj_desc) != ACPI_TYPE_STRING)) {
499                         return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
500                 }
501
502                 /*
503                  * The assignment of the individual elements will be slightly
504                  * different for each source type.
505                  */
506                 switch (ACPI_GET_OBJECT_TYPE(source_desc)) {
507                 case ACPI_TYPE_INTEGER:
508
509                         /* Use the least-significant byte of the integer */
510
511                         value = (u8) (source_desc->integer.value);
512                         break;
513
514                 case ACPI_TYPE_BUFFER:
515                 case ACPI_TYPE_STRING:
516
517                         /* Note: Takes advantage of common string/buffer fields */
518
519                         value = source_desc->buffer.pointer[0];
520                         break;
521
522                 default:
523
524                         /* All other types are invalid */
525
526                         ACPI_ERROR((AE_INFO,
527                                     "Source must be Integer/Buffer/String type, not %s",
528                                     acpi_ut_get_object_type_name(source_desc)));
529                         return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
530                 }
531
532                 /* Store the source value into the target buffer byte */
533
534                 obj_desc->buffer.pointer[index_desc->reference.offset] = value;
535                 break;
536
537         default:
538                 ACPI_ERROR((AE_INFO, "Target is not a Package or BufferField"));
539                 status = AE_AML_OPERAND_TYPE;
540                 break;
541         }
542
543         return_ACPI_STATUS(status);
544 }
545
546 /*******************************************************************************
547  *
548  * FUNCTION:    acpi_ex_store_object_to_node
549  *
550  * PARAMETERS:  source_desc             - Value to be stored
551  *              Node                    - Named object to receive the value
552  *              walk_state              - Current walk state
553  *              implicit_conversion     - Perform implicit conversion (yes/no)
554  *
555  * RETURN:      Status
556  *
557  * DESCRIPTION: Store the object to the named object.
558  *
559  *              The Assignment of an object to a named object is handled here
560  *              The value passed in will replace the current value (if any)
561  *              with the input value.
562  *
563  *              When storing into an object the data is converted to the
564  *              target object type then stored in the object.  This means
565  *              that the target object type (for an initialized target) will
566  *              not be changed by a store operation.
567  *
568  *              Assumes parameters are already validated.
569  *
570  ******************************************************************************/
571
572 acpi_status
573 acpi_ex_store_object_to_node(union acpi_operand_object *source_desc,
574                              struct acpi_namespace_node *node,
575                              struct acpi_walk_state *walk_state,
576                              u8 implicit_conversion)
577 {
578         acpi_status status = AE_OK;
579         union acpi_operand_object *target_desc;
580         union acpi_operand_object *new_desc;
581         acpi_object_type target_type;
582
583         ACPI_FUNCTION_TRACE_PTR(ex_store_object_to_node, source_desc);
584
585         /* Get current type of the node, and object attached to Node */
586
587         target_type = acpi_ns_get_type(node);
588         target_desc = acpi_ns_get_attached_object(node);
589
590         ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Storing %p(%s) into node %p(%s)\n",
591                           source_desc,
592                           acpi_ut_get_object_type_name(source_desc), node,
593                           acpi_ut_get_type_name(target_type)));
594
595         /*
596          * Resolve the source object to an actual value
597          * (If it is a reference object)
598          */
599         status = acpi_ex_resolve_object(&source_desc, target_type, walk_state);
600         if (ACPI_FAILURE(status)) {
601                 return_ACPI_STATUS(status);
602         }
603
604         /* If no implicit conversion, drop into the default case below */
605
606         if ((!implicit_conversion) ||
607             ((walk_state->opcode == AML_COPY_OP) &&
608              (target_type != ACPI_TYPE_LOCAL_REGION_FIELD) &&
609              (target_type != ACPI_TYPE_LOCAL_BANK_FIELD) &&
610              (target_type != ACPI_TYPE_LOCAL_INDEX_FIELD))) {
611                 /*
612                  * Force execution of default (no implicit conversion). Note:
613                  * copy_object does not perform an implicit conversion, as per the ACPI
614                  * spec -- except in case of region/bank/index fields -- because these
615                  * objects must retain their original type permanently.
616                  */
617                 target_type = ACPI_TYPE_ANY;
618         }
619
620         /* Do the actual store operation */
621
622         switch (target_type) {
623         case ACPI_TYPE_BUFFER_FIELD:
624         case ACPI_TYPE_LOCAL_REGION_FIELD:
625         case ACPI_TYPE_LOCAL_BANK_FIELD:
626         case ACPI_TYPE_LOCAL_INDEX_FIELD:
627
628                 /* For fields, copy the source data to the target field. */
629
630                 status = acpi_ex_write_data_to_field(source_desc, target_desc,
631                                                      &walk_state->result_obj);
632                 break;
633
634         case ACPI_TYPE_INTEGER:
635         case ACPI_TYPE_STRING:
636         case ACPI_TYPE_BUFFER:
637
638                 /*
639                  * These target types are all of type Integer/String/Buffer, and
640                  * therefore support implicit conversion before the store.
641                  *
642                  * Copy and/or convert the source object to a new target object
643                  */
644                 status =
645                     acpi_ex_store_object_to_object(source_desc, target_desc,
646                                                    &new_desc, walk_state);
647                 if (ACPI_FAILURE(status)) {
648                         return_ACPI_STATUS(status);
649                 }
650
651                 if (new_desc != target_desc) {
652                         /*
653                          * Store the new new_desc as the new value of the Name, and set
654                          * the Name's type to that of the value being stored in it.
655                          * source_desc reference count is incremented by attach_object.
656                          *
657                          * Note: This may change the type of the node if an explicit store
658                          * has been performed such that the node/object type has been
659                          * changed.
660                          */
661                         status =
662                             acpi_ns_attach_object(node, new_desc,
663                                                   new_desc->common.type);
664
665                         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
666                                           "Store %s into %s via Convert/Attach\n",
667                                           acpi_ut_get_object_type_name
668                                           (source_desc),
669                                           acpi_ut_get_object_type_name
670                                           (new_desc)));
671                 }
672                 break;
673
674         default:
675
676                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
677                                   "Storing %s (%p) directly into node (%p) with no implicit conversion\n",
678                                   acpi_ut_get_object_type_name(source_desc),
679                                   source_desc, node));
680
681                 /* No conversions for all other types.  Just attach the source object */
682
683                 status = acpi_ns_attach_object(node, source_desc,
684                                                ACPI_GET_OBJECT_TYPE
685                                                (source_desc));
686                 break;
687         }
688
689         return_ACPI_STATUS(status);
690 }