Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
[linux-2.6] / drivers / acpi / executer / exresop.c
1
2 /******************************************************************************
3  *
4  * Module Name: exresop - AML Interpreter operand/object resolution
5  *
6  *****************************************************************************/
7
8 /*
9  * Copyright (C) 2000 - 2008, 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 <acpi/amlcode.h>
47 #include <acpi/acparser.h>
48 #include <acpi/acinterp.h>
49 #include <acpi/acnamesp.h>
50
51 #define _COMPONENT          ACPI_EXECUTER
52 ACPI_MODULE_NAME("exresop")
53
54 /* Local prototypes */
55 static acpi_status
56 acpi_ex_check_object_type(acpi_object_type type_needed,
57                           acpi_object_type this_type, void *object);
58
59 /*******************************************************************************
60  *
61  * FUNCTION:    acpi_ex_check_object_type
62  *
63  * PARAMETERS:  type_needed         Object type needed
64  *              this_type           Actual object type
65  *              Object              Object pointer
66  *
67  * RETURN:      Status
68  *
69  * DESCRIPTION: Check required type against actual type
70  *
71  ******************************************************************************/
72
73 static acpi_status
74 acpi_ex_check_object_type(acpi_object_type type_needed,
75                           acpi_object_type this_type, void *object)
76 {
77         ACPI_FUNCTION_ENTRY();
78
79         if (type_needed == ACPI_TYPE_ANY) {
80
81                 /* All types OK, so we don't perform any typechecks */
82
83                 return (AE_OK);
84         }
85
86         if (type_needed == ACPI_TYPE_LOCAL_REFERENCE) {
87                 /*
88                  * Allow the AML "Constant" opcodes (Zero, One, etc.) to be reference
89                  * objects and thus allow them to be targets.  (As per the ACPI
90                  * specification, a store to a constant is a noop.)
91                  */
92                 if ((this_type == ACPI_TYPE_INTEGER) &&
93                     (((union acpi_operand_object *)object)->common.
94                      flags & AOPOBJ_AML_CONSTANT)) {
95                         return (AE_OK);
96                 }
97         }
98
99         if (type_needed != this_type) {
100                 ACPI_ERROR((AE_INFO,
101                             "Needed type [%s], found [%s] %p",
102                             acpi_ut_get_type_name(type_needed),
103                             acpi_ut_get_type_name(this_type), object));
104
105                 return (AE_AML_OPERAND_TYPE);
106         }
107
108         return (AE_OK);
109 }
110
111 /*******************************************************************************
112  *
113  * FUNCTION:    acpi_ex_resolve_operands
114  *
115  * PARAMETERS:  Opcode              - Opcode being interpreted
116  *              stack_ptr           - Pointer to the operand stack to be
117  *                                    resolved
118  *              walk_state          - Current state
119  *
120  * RETURN:      Status
121  *
122  * DESCRIPTION: Convert multiple input operands to the types required by the
123  *              target operator.
124  *
125  *      Each 5-bit group in arg_types represents one required
126  *      operand and indicates the required Type. The corresponding operand
127  *      will be converted to the required type if possible, otherwise we
128  *      abort with an exception.
129  *
130  ******************************************************************************/
131
132 acpi_status
133 acpi_ex_resolve_operands(u16 opcode,
134                          union acpi_operand_object ** stack_ptr,
135                          struct acpi_walk_state * walk_state)
136 {
137         union acpi_operand_object *obj_desc;
138         acpi_status status = AE_OK;
139         u8 object_type;
140         u32 arg_types;
141         const struct acpi_opcode_info *op_info;
142         u32 this_arg_type;
143         acpi_object_type type_needed;
144         u16 target_op = 0;
145
146         ACPI_FUNCTION_TRACE_U32(ex_resolve_operands, opcode);
147
148         op_info = acpi_ps_get_opcode_info(opcode);
149         if (op_info->class == AML_CLASS_UNKNOWN) {
150                 return_ACPI_STATUS(AE_AML_BAD_OPCODE);
151         }
152
153         arg_types = op_info->runtime_args;
154         if (arg_types == ARGI_INVALID_OPCODE) {
155                 ACPI_ERROR((AE_INFO, "Unknown AML opcode %X", opcode));
156
157                 return_ACPI_STATUS(AE_AML_INTERNAL);
158         }
159
160         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
161                           "Opcode %X [%s] RequiredOperandTypes=%8.8X\n",
162                           opcode, op_info->name, arg_types));
163
164         /*
165          * Normal exit is with (arg_types == 0) at end of argument list.
166          * Function will return an exception from within the loop upon
167          * finding an entry which is not (or cannot be converted
168          * to) the required type; if stack underflows; or upon
169          * finding a NULL stack entry (which should not happen).
170          */
171         while (GET_CURRENT_ARG_TYPE(arg_types)) {
172                 if (!stack_ptr || !*stack_ptr) {
173                         ACPI_ERROR((AE_INFO, "Null stack entry at %p",
174                                     stack_ptr));
175
176                         return_ACPI_STATUS(AE_AML_INTERNAL);
177                 }
178
179                 /* Extract useful items */
180
181                 obj_desc = *stack_ptr;
182
183                 /* Decode the descriptor type */
184
185                 switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) {
186                 case ACPI_DESC_TYPE_NAMED:
187
188                         /* Namespace Node */
189
190                         object_type =
191                             ((struct acpi_namespace_node *)obj_desc)->type;
192
193                         /*
194                          * Resolve an alias object. The construction of these objects
195                          * guarantees that there is only one level of alias indirection;
196                          * thus, the attached object is always the aliased namespace node
197                          */
198                         if (object_type == ACPI_TYPE_LOCAL_ALIAS) {
199                                 obj_desc =
200                                     acpi_ns_get_attached_object((struct
201                                                                  acpi_namespace_node
202                                                                  *)obj_desc);
203                                 *stack_ptr = obj_desc;
204                                 object_type =
205                                     ((struct acpi_namespace_node *)obj_desc)->
206                                     type;
207                         }
208                         break;
209
210                 case ACPI_DESC_TYPE_OPERAND:
211
212                         /* ACPI internal object */
213
214                         object_type = ACPI_GET_OBJECT_TYPE(obj_desc);
215
216                         /* Check for bad acpi_object_type */
217
218                         if (!acpi_ut_valid_object_type(object_type)) {
219                                 ACPI_ERROR((AE_INFO,
220                                             "Bad operand object type [%X]",
221                                             object_type));
222
223                                 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
224                         }
225
226                         if (object_type == (u8) ACPI_TYPE_LOCAL_REFERENCE) {
227
228                                 /* Decode the Reference */
229
230                                 op_info = acpi_ps_get_opcode_info(opcode);
231                                 if (op_info->class == AML_CLASS_UNKNOWN) {
232                                         return_ACPI_STATUS(AE_AML_BAD_OPCODE);
233                                 }
234
235                                 switch (obj_desc->reference.opcode) {
236                                 case AML_DEBUG_OP:
237                                         target_op = AML_DEBUG_OP;
238
239                                         /*lint -fallthrough */
240
241                                 case AML_INDEX_OP:
242                                 case AML_REF_OF_OP:
243                                 case AML_ARG_OP:
244                                 case AML_LOCAL_OP:
245                                 case AML_LOAD_OP:       /* ddb_handle from LOAD_OP or LOAD_TABLE_OP */
246                                 case AML_INT_NAMEPATH_OP:       /* Reference to a named object */
247
248                                         ACPI_DEBUG_ONLY_MEMBERS(ACPI_DEBUG_PRINT
249                                                                 ((ACPI_DB_EXEC,
250                                                                   "Operand is a Reference, RefOpcode [%s]\n",
251                                                                   (acpi_ps_get_opcode_info
252                                                                    (obj_desc->
253                                                                     reference.
254                                                                     opcode))->
255                                                                   name)));
256                                         break;
257
258                                 default:
259                                         ACPI_ERROR((AE_INFO,
260                                                     "Operand is a Reference, Unknown Reference Opcode: %X",
261                                                     obj_desc->reference.
262                                                     opcode));
263
264                                         return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
265                                 }
266                         }
267                         break;
268
269                 default:
270
271                         /* Invalid descriptor */
272
273                         ACPI_ERROR((AE_INFO,
274                                     "Invalid descriptor %p [%s]",
275                                     obj_desc,
276                                     acpi_ut_get_descriptor_name(obj_desc)));
277
278                         return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
279                 }
280
281                 /* Get one argument type, point to the next */
282
283                 this_arg_type = GET_CURRENT_ARG_TYPE(arg_types);
284                 INCREMENT_ARG_LIST(arg_types);
285
286                 /*
287                  * Handle cases where the object does not need to be
288                  * resolved to a value
289                  */
290                 switch (this_arg_type) {
291                 case ARGI_REF_OR_STRING:        /* Can be a String or Reference */
292
293                         if ((ACPI_GET_DESCRIPTOR_TYPE(obj_desc) ==
294                              ACPI_DESC_TYPE_OPERAND)
295                             && (ACPI_GET_OBJECT_TYPE(obj_desc) ==
296                                 ACPI_TYPE_STRING)) {
297                                 /*
298                                  * String found - the string references a named object and
299                                  * must be resolved to a node
300                                  */
301                                 goto next_operand;
302                         }
303
304                         /*
305                          * Else not a string - fall through to the normal Reference
306                          * case below
307                          */
308                         /*lint -fallthrough */
309
310                 case ARGI_REFERENCE:    /* References: */
311                 case ARGI_INTEGER_REF:
312                 case ARGI_OBJECT_REF:
313                 case ARGI_DEVICE_REF:
314                 case ARGI_TARGETREF:    /* Allows implicit conversion rules before store */
315                 case ARGI_FIXED_TARGET: /* No implicit conversion before store to target */
316                 case ARGI_SIMPLE_TARGET:        /* Name, Local, or Arg - no implicit conversion  */
317
318                         /*
319                          * Need an operand of type ACPI_TYPE_LOCAL_REFERENCE
320                          * A Namespace Node is OK as-is
321                          */
322                         if (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) ==
323                             ACPI_DESC_TYPE_NAMED) {
324                                 goto next_operand;
325                         }
326
327                         status =
328                             acpi_ex_check_object_type(ACPI_TYPE_LOCAL_REFERENCE,
329                                                       object_type, obj_desc);
330                         if (ACPI_FAILURE(status)) {
331                                 return_ACPI_STATUS(status);
332                         }
333                         goto next_operand;
334
335                 case ARGI_DATAREFOBJ:   /* Store operator only */
336
337                         /*
338                          * We don't want to resolve index_op reference objects during
339                          * a store because this would be an implicit de_ref_of operation.
340                          * Instead, we just want to store the reference object.
341                          * -- All others must be resolved below.
342                          */
343                         if ((opcode == AML_STORE_OP) &&
344                             (ACPI_GET_OBJECT_TYPE(*stack_ptr) ==
345                              ACPI_TYPE_LOCAL_REFERENCE)
346                             && ((*stack_ptr)->reference.opcode == AML_INDEX_OP)) {
347                                 goto next_operand;
348                         }
349                         break;
350
351                 default:
352                         /* All cases covered above */
353                         break;
354                 }
355
356                 /*
357                  * Resolve this object to a value
358                  */
359                 status = acpi_ex_resolve_to_value(stack_ptr, walk_state);
360                 if (ACPI_FAILURE(status)) {
361                         return_ACPI_STATUS(status);
362                 }
363
364                 /* Get the resolved object */
365
366                 obj_desc = *stack_ptr;
367
368                 /*
369                  * Check the resulting object (value) type
370                  */
371                 switch (this_arg_type) {
372                         /*
373                          * For the simple cases, only one type of resolved object
374                          * is allowed
375                          */
376                 case ARGI_MUTEX:
377
378                         /* Need an operand of type ACPI_TYPE_MUTEX */
379
380                         type_needed = ACPI_TYPE_MUTEX;
381                         break;
382
383                 case ARGI_EVENT:
384
385                         /* Need an operand of type ACPI_TYPE_EVENT */
386
387                         type_needed = ACPI_TYPE_EVENT;
388                         break;
389
390                 case ARGI_PACKAGE:      /* Package */
391
392                         /* Need an operand of type ACPI_TYPE_PACKAGE */
393
394                         type_needed = ACPI_TYPE_PACKAGE;
395                         break;
396
397                 case ARGI_ANYTYPE:
398
399                         /* Any operand type will do */
400
401                         type_needed = ACPI_TYPE_ANY;
402                         break;
403
404                 case ARGI_DDBHANDLE:
405
406                         /* Need an operand of type ACPI_TYPE_DDB_HANDLE */
407
408                         type_needed = ACPI_TYPE_LOCAL_REFERENCE;
409                         break;
410
411                         /*
412                          * The more complex cases allow multiple resolved object types
413                          */
414                 case ARGI_INTEGER:
415
416                         /*
417                          * Need an operand of type ACPI_TYPE_INTEGER,
418                          * But we can implicitly convert from a STRING or BUFFER
419                          * Aka - "Implicit Source Operand Conversion"
420                          */
421                         status =
422                             acpi_ex_convert_to_integer(obj_desc, stack_ptr, 16);
423                         if (ACPI_FAILURE(status)) {
424                                 if (status == AE_TYPE) {
425                                         ACPI_ERROR((AE_INFO,
426                                                     "Needed [Integer/String/Buffer], found [%s] %p",
427                                                     acpi_ut_get_object_type_name
428                                                     (obj_desc), obj_desc));
429
430                                         return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
431                                 }
432
433                                 return_ACPI_STATUS(status);
434                         }
435
436                         if (obj_desc != *stack_ptr) {
437                                 acpi_ut_remove_reference(obj_desc);
438                         }
439                         goto next_operand;
440
441                 case ARGI_BUFFER:
442
443                         /*
444                          * Need an operand of type ACPI_TYPE_BUFFER,
445                          * But we can implicitly convert from a STRING or INTEGER
446                          * Aka - "Implicit Source Operand Conversion"
447                          */
448                         status = acpi_ex_convert_to_buffer(obj_desc, stack_ptr);
449                         if (ACPI_FAILURE(status)) {
450                                 if (status == AE_TYPE) {
451                                         ACPI_ERROR((AE_INFO,
452                                                     "Needed [Integer/String/Buffer], found [%s] %p",
453                                                     acpi_ut_get_object_type_name
454                                                     (obj_desc), obj_desc));
455
456                                         return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
457                                 }
458
459                                 return_ACPI_STATUS(status);
460                         }
461
462                         if (obj_desc != *stack_ptr) {
463                                 acpi_ut_remove_reference(obj_desc);
464                         }
465                         goto next_operand;
466
467                 case ARGI_STRING:
468
469                         /*
470                          * Need an operand of type ACPI_TYPE_STRING,
471                          * But we can implicitly convert from a BUFFER or INTEGER
472                          * Aka - "Implicit Source Operand Conversion"
473                          */
474                         status = acpi_ex_convert_to_string(obj_desc, stack_ptr,
475                                                            ACPI_IMPLICIT_CONVERT_HEX);
476                         if (ACPI_FAILURE(status)) {
477                                 if (status == AE_TYPE) {
478                                         ACPI_ERROR((AE_INFO,
479                                                     "Needed [Integer/String/Buffer], found [%s] %p",
480                                                     acpi_ut_get_object_type_name
481                                                     (obj_desc), obj_desc));
482
483                                         return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
484                                 }
485
486                                 return_ACPI_STATUS(status);
487                         }
488
489                         if (obj_desc != *stack_ptr) {
490                                 acpi_ut_remove_reference(obj_desc);
491                         }
492                         goto next_operand;
493
494                 case ARGI_COMPUTEDATA:
495
496                         /* Need an operand of type INTEGER, STRING or BUFFER */
497
498                         switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
499                         case ACPI_TYPE_INTEGER:
500                         case ACPI_TYPE_STRING:
501                         case ACPI_TYPE_BUFFER:
502
503                                 /* Valid operand */
504                                 break;
505
506                         default:
507                                 ACPI_ERROR((AE_INFO,
508                                             "Needed [Integer/String/Buffer], found [%s] %p",
509                                             acpi_ut_get_object_type_name
510                                             (obj_desc), obj_desc));
511
512                                 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
513                         }
514                         goto next_operand;
515
516                 case ARGI_BUFFER_OR_STRING:
517
518                         /* Need an operand of type STRING or BUFFER */
519
520                         switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
521                         case ACPI_TYPE_STRING:
522                         case ACPI_TYPE_BUFFER:
523
524                                 /* Valid operand */
525                                 break;
526
527                         case ACPI_TYPE_INTEGER:
528
529                                 /* Highest priority conversion is to type Buffer */
530
531                                 status =
532                                     acpi_ex_convert_to_buffer(obj_desc,
533                                                               stack_ptr);
534                                 if (ACPI_FAILURE(status)) {
535                                         return_ACPI_STATUS(status);
536                                 }
537
538                                 if (obj_desc != *stack_ptr) {
539                                         acpi_ut_remove_reference(obj_desc);
540                                 }
541                                 break;
542
543                         default:
544                                 ACPI_ERROR((AE_INFO,
545                                             "Needed [Integer/String/Buffer], found [%s] %p",
546                                             acpi_ut_get_object_type_name
547                                             (obj_desc), obj_desc));
548
549                                 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
550                         }
551                         goto next_operand;
552
553                 case ARGI_DATAOBJECT:
554                         /*
555                          * ARGI_DATAOBJECT is only used by the size_of operator.
556                          * Need a buffer, string, package, or ref_of reference.
557                          *
558                          * The only reference allowed here is a direct reference to
559                          * a namespace node.
560                          */
561                         switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
562                         case ACPI_TYPE_PACKAGE:
563                         case ACPI_TYPE_STRING:
564                         case ACPI_TYPE_BUFFER:
565                         case ACPI_TYPE_LOCAL_REFERENCE:
566
567                                 /* Valid operand */
568                                 break;
569
570                         default:
571                                 ACPI_ERROR((AE_INFO,
572                                             "Needed [Buffer/String/Package/Reference], found [%s] %p",
573                                             acpi_ut_get_object_type_name
574                                             (obj_desc), obj_desc));
575
576                                 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
577                         }
578                         goto next_operand;
579
580                 case ARGI_COMPLEXOBJ:
581
582                         /* Need a buffer or package or (ACPI 2.0) String */
583
584                         switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
585                         case ACPI_TYPE_PACKAGE:
586                         case ACPI_TYPE_STRING:
587                         case ACPI_TYPE_BUFFER:
588
589                                 /* Valid operand */
590                                 break;
591
592                         default:
593                                 ACPI_ERROR((AE_INFO,
594                                             "Needed [Buffer/String/Package], found [%s] %p",
595                                             acpi_ut_get_object_type_name
596                                             (obj_desc), obj_desc));
597
598                                 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
599                         }
600                         goto next_operand;
601
602                 case ARGI_REGION_OR_BUFFER:     /* Used by Load() only */
603
604                         /* Need an operand of type REGION or a BUFFER (which could be a resolved region field) */
605
606                         switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
607                         case ACPI_TYPE_BUFFER:
608                         case ACPI_TYPE_REGION:
609
610                                 /* Valid operand */
611                                 break;
612
613                         default:
614                                 ACPI_ERROR((AE_INFO,
615                                             "Needed [Region/Buffer], found [%s] %p",
616                                             acpi_ut_get_object_type_name
617                                             (obj_desc), obj_desc));
618
619                                 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
620                         }
621                         goto next_operand;
622
623                 case ARGI_DATAREFOBJ:
624
625                         /* Used by the Store() operator only */
626
627                         switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
628                         case ACPI_TYPE_INTEGER:
629                         case ACPI_TYPE_PACKAGE:
630                         case ACPI_TYPE_STRING:
631                         case ACPI_TYPE_BUFFER:
632                         case ACPI_TYPE_BUFFER_FIELD:
633                         case ACPI_TYPE_LOCAL_REFERENCE:
634                         case ACPI_TYPE_LOCAL_REGION_FIELD:
635                         case ACPI_TYPE_LOCAL_BANK_FIELD:
636                         case ACPI_TYPE_LOCAL_INDEX_FIELD:
637                         case ACPI_TYPE_DDB_HANDLE:
638
639                                 /* Valid operand */
640                                 break;
641
642                         default:
643
644                                 if (acpi_gbl_enable_interpreter_slack) {
645                                         /*
646                                          * Enable original behavior of Store(), allowing any and all
647                                          * objects as the source operand.  The ACPI spec does not
648                                          * allow this, however.
649                                          */
650                                         break;
651                                 }
652
653                                 if (target_op == AML_DEBUG_OP) {
654
655                                         /* Allow store of any object to the Debug object */
656
657                                         break;
658                                 }
659
660                                 ACPI_ERROR((AE_INFO,
661                                             "Needed Integer/Buffer/String/Package/Ref/Ddb], found [%s] %p",
662                                             acpi_ut_get_object_type_name
663                                             (obj_desc), obj_desc));
664
665                                 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
666                         }
667                         goto next_operand;
668
669                 default:
670
671                         /* Unknown type */
672
673                         ACPI_ERROR((AE_INFO,
674                                     "Internal - Unknown ARGI (required operand) type %X",
675                                     this_arg_type));
676
677                         return_ACPI_STATUS(AE_BAD_PARAMETER);
678                 }
679
680                 /*
681                  * Make sure that the original object was resolved to the
682                  * required object type (Simple cases only).
683                  */
684                 status = acpi_ex_check_object_type(type_needed,
685                                                    ACPI_GET_OBJECT_TYPE
686                                                    (*stack_ptr), *stack_ptr);
687                 if (ACPI_FAILURE(status)) {
688                         return_ACPI_STATUS(status);
689                 }
690
691               next_operand:
692                 /*
693                  * If more operands needed, decrement stack_ptr to point
694                  * to next operand on stack
695                  */
696                 if (GET_CURRENT_ARG_TYPE(arg_types)) {
697                         stack_ptr--;
698                 }
699         }
700
701         ACPI_DUMP_OPERANDS(walk_state->operands,
702                            acpi_ps_get_opcode_name(opcode),
703                            walk_state->num_operands);
704
705         return_ACPI_STATUS(status);
706 }