[ACPI] ACPICA 20050930
[linux-2.6.git] / 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 - 2005, 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/amlcode.h>
47 #include <acpi/acparser.h>
48 #include <acpi/acinterp.h>
49
50 #define _COMPONENT          ACPI_EXECUTER
51 ACPI_MODULE_NAME("exresop")
52
53 /* Local prototypes */
54 static acpi_status
55 acpi_ex_check_object_type(acpi_object_type type_needed,
56                           acpi_object_type this_type, void *object);
57
58 /*******************************************************************************
59  *
60  * FUNCTION:    acpi_ex_check_object_type
61  *
62  * PARAMETERS:  type_needed         Object type needed
63  *              this_type           Actual object type
64  *              Object              Object pointer
65  *
66  * RETURN:      Status
67  *
68  * DESCRIPTION: Check required type against actual type
69  *
70  ******************************************************************************/
71
72 static acpi_status
73 acpi_ex_check_object_type(acpi_object_type type_needed,
74                           acpi_object_type this_type, void *object)
75 {
76         ACPI_FUNCTION_NAME("ex_check_object_type");
77
78         if (type_needed == ACPI_TYPE_ANY) {
79                 /* All types OK, so we don't perform any typechecks */
80
81                 return (AE_OK);
82         }
83
84         if (type_needed == ACPI_TYPE_LOCAL_REFERENCE) {
85                 /*
86                  * Allow the AML "Constant" opcodes (Zero, One, etc.) to be reference
87                  * objects and thus allow them to be targets.  (As per the ACPI
88                  * specification, a store to a constant is a noop.)
89                  */
90                 if ((this_type == ACPI_TYPE_INTEGER) &&
91                     (((union acpi_operand_object *)object)->common.
92                      flags & AOPOBJ_AML_CONSTANT)) {
93                         return (AE_OK);
94                 }
95         }
96
97         if (type_needed != this_type) {
98                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
99                                   "Needed [%s], found [%s] %p\n",
100                                   acpi_ut_get_type_name(type_needed),
101                                   acpi_ut_get_type_name(this_type), object));
102
103                 return (AE_AML_OPERAND_TYPE);
104         }
105
106         return (AE_OK);
107 }
108
109 /*******************************************************************************
110  *
111  * FUNCTION:    acpi_ex_resolve_operands
112  *
113  * PARAMETERS:  Opcode              - Opcode being interpreted
114  *              stack_ptr           - Pointer to the operand stack to be
115  *                                    resolved
116  *              walk_state          - Current state
117  *
118  * RETURN:      Status
119  *
120  * DESCRIPTION: Convert multiple input operands to the types required by the
121  *              target operator.
122  *
123  *      Each 5-bit group in arg_types represents one required
124  *      operand and indicates the required Type. The corresponding operand
125  *      will be converted to the required type if possible, otherwise we
126  *      abort with an exception.
127  *
128  ******************************************************************************/
129
130 acpi_status
131 acpi_ex_resolve_operands(u16 opcode,
132                          union acpi_operand_object ** stack_ptr,
133                          struct acpi_walk_state * walk_state)
134 {
135         union acpi_operand_object *obj_desc;
136         acpi_status status = AE_OK;
137         u8 object_type;
138         void *temp_node;
139         u32 arg_types;
140         const struct acpi_opcode_info *op_info;
141         u32 this_arg_type;
142         acpi_object_type type_needed;
143         u16 target_op = 0;
144
145         ACPI_FUNCTION_TRACE_U32("ex_resolve_operands", opcode);
146
147         op_info = acpi_ps_get_opcode_info(opcode);
148         if (op_info->class == AML_CLASS_UNKNOWN) {
149                 return_ACPI_STATUS(AE_AML_BAD_OPCODE);
150         }
151
152         arg_types = op_info->runtime_args;
153         if (arg_types == ARGI_INVALID_OPCODE) {
154                 ACPI_REPORT_ERROR(("resolve_operands: %X is not a valid AML opcode\n", opcode));
155
156                 return_ACPI_STATUS(AE_AML_INTERNAL);
157         }
158
159         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
160                           "Opcode %X [%s] required_operand_types=%8.8X\n",
161                           opcode, op_info->name, arg_types));
162
163         /*
164          * Normal exit is with (arg_types == 0) at end of argument list.
165          * Function will return an exception from within the loop upon
166          * finding an entry which is not (or cannot be converted
167          * to) the required type; if stack underflows; or upon
168          * finding a NULL stack entry (which should not happen).
169          */
170         while (GET_CURRENT_ARG_TYPE(arg_types)) {
171                 if (!stack_ptr || !*stack_ptr) {
172                         ACPI_REPORT_ERROR(("resolve_operands: Null stack entry at %p\n", stack_ptr));
173
174                         return_ACPI_STATUS(AE_AML_INTERNAL);
175                 }
176
177                 /* Extract useful items */
178
179                 obj_desc = *stack_ptr;
180
181                 /* Decode the descriptor type */
182
183                 switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) {
184                 case ACPI_DESC_TYPE_NAMED:
185
186                         /* Namespace Node */
187
188                         object_type =
189                             ((struct acpi_namespace_node *)obj_desc)->type;
190                         break;
191
192                 case ACPI_DESC_TYPE_OPERAND:
193
194                         /* ACPI internal object */
195
196                         object_type = ACPI_GET_OBJECT_TYPE(obj_desc);
197
198                         /* Check for bad acpi_object_type */
199
200                         if (!acpi_ut_valid_object_type(object_type)) {
201                                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
202                                                   "Bad operand object type [%X]\n",
203                                                   object_type));
204
205                                 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
206                         }
207
208                         if (object_type == (u8) ACPI_TYPE_LOCAL_REFERENCE) {
209                                 /* Decode the Reference */
210
211                                 op_info = acpi_ps_get_opcode_info(opcode);
212                                 if (op_info->class == AML_CLASS_UNKNOWN) {
213                                         return_ACPI_STATUS(AE_AML_BAD_OPCODE);
214                                 }
215
216                                 switch (obj_desc->reference.opcode) {
217                                 case AML_DEBUG_OP:
218                                         target_op = AML_DEBUG_OP;
219
220                                         /*lint -fallthrough */
221
222                                 case AML_NAME_OP:
223                                 case AML_INDEX_OP:
224                                 case AML_REF_OF_OP:
225                                 case AML_ARG_OP:
226                                 case AML_LOCAL_OP:
227                                 case AML_LOAD_OP:       /* ddb_handle from LOAD_OP or LOAD_TABLE_OP */
228                                 case AML_INT_NAMEPATH_OP:       /* Reference to a named object */
229
230                                         ACPI_DEBUG_ONLY_MEMBERS(ACPI_DEBUG_PRINT
231                                                                 ((ACPI_DB_EXEC,
232                                                                   "Operand is a Reference, ref_opcode [%s]\n",
233                                                                   (acpi_ps_get_opcode_info
234                                                                    (obj_desc->
235                                                                     reference.
236                                                                     opcode))->
237                                                                   name)));
238                                         break;
239
240                                 default:
241                                         ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
242                                                           "Operand is a Reference, Unknown Reference Opcode %X [%s]\n",
243                                                           obj_desc->reference.
244                                                           opcode,
245                                                           (acpi_ps_get_opcode_info
246                                                            (obj_desc->reference.
247                                                             opcode))->name));
248
249                                         return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
250                                 }
251                         }
252                         break;
253
254                 default:
255
256                         /* Invalid descriptor */
257
258                         ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
259                                           "Invalid descriptor %p [%s]\n",
260                                           obj_desc,
261                                           acpi_ut_get_descriptor_name
262                                           (obj_desc)));
263
264                         return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
265                 }
266
267                 /* Get one argument type, point to the next */
268
269                 this_arg_type = GET_CURRENT_ARG_TYPE(arg_types);
270                 INCREMENT_ARG_LIST(arg_types);
271
272                 /*
273                  * Handle cases where the object does not need to be
274                  * resolved to a value
275                  */
276                 switch (this_arg_type) {
277                 case ARGI_REF_OR_STRING:        /* Can be a String or Reference */
278
279                         if ((ACPI_GET_DESCRIPTOR_TYPE(obj_desc) ==
280                              ACPI_DESC_TYPE_OPERAND)
281                             && (ACPI_GET_OBJECT_TYPE(obj_desc) ==
282                                 ACPI_TYPE_STRING)) {
283                                 /*
284                                  * String found - the string references a named object and
285                                  * must be resolved to a node
286                                  */
287                                 goto next_operand;
288                         }
289
290                         /*
291                          * Else not a string - fall through to the normal Reference
292                          * case below
293                          */
294                         /*lint -fallthrough */
295
296                 case ARGI_REFERENCE:    /* References: */
297                 case ARGI_INTEGER_REF:
298                 case ARGI_OBJECT_REF:
299                 case ARGI_DEVICE_REF:
300                 case ARGI_TARGETREF:    /* Allows implicit conversion rules before store */
301                 case ARGI_FIXED_TARGET: /* No implicit conversion before store to target */
302                 case ARGI_SIMPLE_TARGET:        /* Name, Local, or Arg - no implicit conversion  */
303
304                         /*
305                          * Need an operand of type ACPI_TYPE_LOCAL_REFERENCE
306                          * A Namespace Node is OK as-is
307                          */
308                         if (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) ==
309                             ACPI_DESC_TYPE_NAMED) {
310                                 goto next_operand;
311                         }
312
313                         status =
314                             acpi_ex_check_object_type(ACPI_TYPE_LOCAL_REFERENCE,
315                                                       object_type, obj_desc);
316                         if (ACPI_FAILURE(status)) {
317                                 return_ACPI_STATUS(status);
318                         }
319
320                         if (obj_desc->reference.opcode == AML_NAME_OP) {
321                                 /* Convert a named reference to the actual named object */
322
323                                 temp_node = obj_desc->reference.object;
324                                 acpi_ut_remove_reference(obj_desc);
325                                 (*stack_ptr) = temp_node;
326                         }
327                         goto next_operand;
328
329                 case ARGI_DATAREFOBJ:   /* Store operator only */
330
331                         /*
332                          * We don't want to resolve index_op reference objects during
333                          * a store because this would be an implicit de_ref_of operation.
334                          * Instead, we just want to store the reference object.
335                          * -- All others must be resolved below.
336                          */
337                         if ((opcode == AML_STORE_OP) &&
338                             (ACPI_GET_OBJECT_TYPE(*stack_ptr) ==
339                              ACPI_TYPE_LOCAL_REFERENCE)
340                             && ((*stack_ptr)->reference.opcode ==
341                                 AML_INDEX_OP)) {
342                                 goto next_operand;
343                         }
344                         break;
345
346                 default:
347                         /* All cases covered above */
348                         break;
349                 }
350
351                 /*
352                  * Resolve this object to a value
353                  */
354                 status = acpi_ex_resolve_to_value(stack_ptr, walk_state);
355                 if (ACPI_FAILURE(status)) {
356                         return_ACPI_STATUS(status);
357                 }
358
359                 /* Get the resolved object */
360
361                 obj_desc = *stack_ptr;
362
363                 /*
364                  * Check the resulting object (value) type
365                  */
366                 switch (this_arg_type) {
367                         /*
368                          * For the simple cases, only one type of resolved object
369                          * is allowed
370                          */
371                 case ARGI_MUTEX:
372
373                         /* Need an operand of type ACPI_TYPE_MUTEX */
374
375                         type_needed = ACPI_TYPE_MUTEX;
376                         break;
377
378                 case ARGI_EVENT:
379
380                         /* Need an operand of type ACPI_TYPE_EVENT */
381
382                         type_needed = ACPI_TYPE_EVENT;
383                         break;
384
385                 case ARGI_PACKAGE:      /* Package */
386
387                         /* Need an operand of type ACPI_TYPE_PACKAGE */
388
389                         type_needed = ACPI_TYPE_PACKAGE;
390                         break;
391
392                 case ARGI_ANYTYPE:
393
394                         /* Any operand type will do */
395
396                         type_needed = ACPI_TYPE_ANY;
397                         break;
398
399                 case ARGI_DDBHANDLE:
400
401                         /* Need an operand of type ACPI_TYPE_DDB_HANDLE */
402
403                         type_needed = ACPI_TYPE_LOCAL_REFERENCE;
404                         break;
405
406                         /*
407                          * The more complex cases allow multiple resolved object types
408                          */
409                 case ARGI_INTEGER:
410
411                         /*
412                          * Need an operand of type ACPI_TYPE_INTEGER,
413                          * But we can implicitly convert from a STRING or BUFFER
414                          * Aka - "Implicit Source Operand Conversion"
415                          */
416                         status =
417                             acpi_ex_convert_to_integer(obj_desc, stack_ptr, 16);
418                         if (ACPI_FAILURE(status)) {
419                                 if (status == AE_TYPE) {
420                                         ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
421                                                           "Needed [Integer/String/Buffer], found [%s] %p\n",
422                                                           acpi_ut_get_object_type_name
423                                                           (obj_desc),
424                                                           obj_desc));
425
426                                         return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
427                                 }
428
429                                 return_ACPI_STATUS(status);
430                         }
431
432                         if (obj_desc != *stack_ptr) {
433                                 acpi_ut_remove_reference(obj_desc);
434                         }
435                         goto next_operand;
436
437                 case ARGI_BUFFER:
438
439                         /*
440                          * Need an operand of type ACPI_TYPE_BUFFER,
441                          * But we can implicitly convert from a STRING or INTEGER
442                          * Aka - "Implicit Source Operand Conversion"
443                          */
444                         status = acpi_ex_convert_to_buffer(obj_desc, stack_ptr);
445                         if (ACPI_FAILURE(status)) {
446                                 if (status == AE_TYPE) {
447                                         ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
448                                                           "Needed [Integer/String/Buffer], found [%s] %p\n",
449                                                           acpi_ut_get_object_type_name
450                                                           (obj_desc),
451                                                           obj_desc));
452
453                                         return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
454                                 }
455
456                                 return_ACPI_STATUS(status);
457                         }
458
459                         if (obj_desc != *stack_ptr) {
460                                 acpi_ut_remove_reference(obj_desc);
461                         }
462                         goto next_operand;
463
464                 case ARGI_STRING:
465
466                         /*
467                          * Need an operand of type ACPI_TYPE_STRING,
468                          * But we can implicitly convert from a BUFFER or INTEGER
469                          * Aka - "Implicit Source Operand Conversion"
470                          */
471                         status = acpi_ex_convert_to_string(obj_desc, stack_ptr,
472                                                            ACPI_IMPLICIT_CONVERT_HEX);
473                         if (ACPI_FAILURE(status)) {
474                                 if (status == AE_TYPE) {
475                                         ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
476                                                           "Needed [Integer/String/Buffer], found [%s] %p\n",
477                                                           acpi_ut_get_object_type_name
478                                                           (obj_desc),
479                                                           obj_desc));
480
481                                         return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
482                                 }
483
484                                 return_ACPI_STATUS(status);
485                         }
486
487                         if (obj_desc != *stack_ptr) {
488                                 acpi_ut_remove_reference(obj_desc);
489                         }
490                         goto next_operand;
491
492                 case ARGI_COMPUTEDATA:
493
494                         /* Need an operand of type INTEGER, STRING or BUFFER */
495
496                         switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
497                         case ACPI_TYPE_INTEGER:
498                         case ACPI_TYPE_STRING:
499                         case ACPI_TYPE_BUFFER:
500
501                                 /* Valid operand */
502                                 break;
503
504                         default:
505                                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
506                                                   "Needed [Integer/String/Buffer], found [%s] %p\n",
507                                                   acpi_ut_get_object_type_name
508                                                   (obj_desc), obj_desc));
509
510                                 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
511                         }
512                         goto next_operand;
513
514                 case ARGI_BUFFER_OR_STRING:
515
516                         /* Need an operand of type STRING or BUFFER */
517
518                         switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
519                         case ACPI_TYPE_STRING:
520                         case ACPI_TYPE_BUFFER:
521
522                                 /* Valid operand */
523                                 break;
524
525                         case ACPI_TYPE_INTEGER:
526
527                                 /* Highest priority conversion is to type Buffer */
528
529                                 status =
530                                     acpi_ex_convert_to_buffer(obj_desc,
531                                                               stack_ptr);
532                                 if (ACPI_FAILURE(status)) {
533                                         return_ACPI_STATUS(status);
534                                 }
535
536                                 if (obj_desc != *stack_ptr) {
537                                         acpi_ut_remove_reference(obj_desc);
538                                 }
539                                 break;
540
541                         default:
542                                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
543                                                   "Needed [Integer/String/Buffer], found [%s] %p\n",
544                                                   acpi_ut_get_object_type_name
545                                                   (obj_desc), obj_desc));
546
547                                 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
548                         }
549                         goto next_operand;
550
551                 case ARGI_DATAOBJECT:
552                         /*
553                          * ARGI_DATAOBJECT is only used by the size_of operator.
554                          * Need a buffer, string, package, or ref_of reference.
555                          *
556                          * The only reference allowed here is a direct reference to
557                          * a namespace node.
558                          */
559                         switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
560                         case ACPI_TYPE_PACKAGE:
561                         case ACPI_TYPE_STRING:
562                         case ACPI_TYPE_BUFFER:
563                         case ACPI_TYPE_LOCAL_REFERENCE:
564
565                                 /* Valid operand */
566                                 break;
567
568                         default:
569                                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
570                                                   "Needed [Buffer/String/Package/Reference], found [%s] %p\n",
571                                                   acpi_ut_get_object_type_name
572                                                   (obj_desc), obj_desc));
573
574                                 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
575                         }
576                         goto next_operand;
577
578                 case ARGI_COMPLEXOBJ:
579
580                         /* Need a buffer or package or (ACPI 2.0) String */
581
582                         switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
583                         case ACPI_TYPE_PACKAGE:
584                         case ACPI_TYPE_STRING:
585                         case ACPI_TYPE_BUFFER:
586
587                                 /* Valid operand */
588                                 break;
589
590                         default:
591                                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
592                                                   "Needed [Buffer/String/Package], found [%s] %p\n",
593                                                   acpi_ut_get_object_type_name
594                                                   (obj_desc), obj_desc));
595
596                                 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
597                         }
598                         goto next_operand;
599
600                 case ARGI_REGION_OR_FIELD:
601
602                         /* Need an operand of type REGION or a FIELD in a region */
603
604                         switch (ACPI_GET_OBJECT_TYPE(obj_desc)) {
605                         case ACPI_TYPE_REGION:
606                         case ACPI_TYPE_LOCAL_REGION_FIELD:
607                         case ACPI_TYPE_LOCAL_BANK_FIELD:
608                         case ACPI_TYPE_LOCAL_INDEX_FIELD:
609
610                                 /* Valid operand */
611                                 break;
612
613                         default:
614                                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
615                                                   "Needed [Region/region_field], found [%s] %p\n",
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                                         /* Allow store of any object to the Debug object */
655
656                                         break;
657                                 }
658
659                                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
660                                                   "Needed Integer/Buffer/String/Package/Ref/Ddb], found [%s] %p\n",
661                                                   acpi_ut_get_object_type_name
662                                                   (obj_desc), obj_desc));
663
664                                 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
665                         }
666                         goto next_operand;
667
668                 default:
669
670                         /* Unknown type */
671
672                         ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
673                                           "Internal - Unknown ARGI (required operand) type %X\n",
674                                           this_arg_type));
675
676                         return_ACPI_STATUS(AE_BAD_PARAMETER);
677                 }
678
679                 /*
680                  * Make sure that the original object was resolved to the
681                  * required object type (Simple cases only).
682                  */
683                 status = acpi_ex_check_object_type(type_needed,
684                                                    ACPI_GET_OBJECT_TYPE
685                                                    (*stack_ptr), *stack_ptr);
686                 if (ACPI_FAILURE(status)) {
687                         return_ACPI_STATUS(status);
688                 }
689
690               next_operand:
691                 /*
692                  * If more operands needed, decrement stack_ptr to point
693                  * to next operand on stack
694                  */
695                 if (GET_CURRENT_ARG_TYPE(arg_types)) {
696                         stack_ptr--;
697                 }
698         }
699
700         return_ACPI_STATUS(status);
701 }