Merge branch 'for-linus' from kernel.org:/.../shaggy/jfs-2.6 manually
[linux-2.6] / drivers / acpi / dispatcher / dswexec.c
1 /******************************************************************************
2  *
3  * Module Name: dswexec - Dispatcher method execution callbacks;
4  *                        dispatch to interpreter.
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/acparser.h>
47 #include <acpi/amlcode.h>
48 #include <acpi/acdispat.h>
49 #include <acpi/acinterp.h>
50 #include <acpi/acnamesp.h>
51 #include <acpi/acdebug.h>
52 #include <acpi/acdisasm.h>
53
54 #define _COMPONENT          ACPI_DISPATCHER
55 ACPI_MODULE_NAME("dswexec")
56
57 /*
58  * Dispatch table for opcode classes
59  */
60 static ACPI_EXECUTE_OP acpi_gbl_op_type_dispatch[] = {
61         acpi_ex_opcode_0A_0T_1R,
62         acpi_ex_opcode_1A_0T_0R,
63         acpi_ex_opcode_1A_0T_1R,
64         acpi_ex_opcode_1A_1T_0R,
65         acpi_ex_opcode_1A_1T_1R,
66         acpi_ex_opcode_2A_0T_0R,
67         acpi_ex_opcode_2A_0T_1R,
68         acpi_ex_opcode_2A_1T_1R,
69         acpi_ex_opcode_2A_2T_1R,
70         acpi_ex_opcode_3A_0T_0R,
71         acpi_ex_opcode_3A_1T_1R,
72         acpi_ex_opcode_6A_0T_1R
73 };
74
75 /*****************************************************************************
76  *
77  * FUNCTION:    acpi_ds_get_predicate_value
78  *
79  * PARAMETERS:  walk_state      - Current state of the parse tree walk
80  *              result_obj      - if non-zero, pop result from result stack
81  *
82  * RETURN:      Status
83  *
84  * DESCRIPTION: Get the result of a predicate evaluation
85  *
86  ****************************************************************************/
87
88 acpi_status
89 acpi_ds_get_predicate_value(struct acpi_walk_state *walk_state,
90                             union acpi_operand_object *result_obj)
91 {
92         acpi_status status = AE_OK;
93         union acpi_operand_object *obj_desc;
94         union acpi_operand_object *local_obj_desc = NULL;
95
96         ACPI_FUNCTION_TRACE_PTR("ds_get_predicate_value", walk_state);
97
98         walk_state->control_state->common.state = 0;
99
100         if (result_obj) {
101                 status = acpi_ds_result_pop(&obj_desc, walk_state);
102                 if (ACPI_FAILURE(status)) {
103                         ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
104                                           "Could not get result from predicate evaluation, %s\n",
105                                           acpi_format_exception(status)));
106
107                         return_ACPI_STATUS(status);
108                 }
109         } else {
110                 status = acpi_ds_create_operand(walk_state, walk_state->op, 0);
111                 if (ACPI_FAILURE(status)) {
112                         return_ACPI_STATUS(status);
113                 }
114
115                 status =
116                     acpi_ex_resolve_to_value(&walk_state->operands[0],
117                                              walk_state);
118                 if (ACPI_FAILURE(status)) {
119                         return_ACPI_STATUS(status);
120                 }
121
122                 obj_desc = walk_state->operands[0];
123         }
124
125         if (!obj_desc) {
126                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
127                                   "No predicate obj_desc=%p State=%p\n",
128                                   obj_desc, walk_state));
129
130                 return_ACPI_STATUS(AE_AML_NO_OPERAND);
131         }
132
133         /*
134          * Result of predicate evaluation must be an Integer
135          * object. Implicitly convert the argument if necessary.
136          */
137         status = acpi_ex_convert_to_integer(obj_desc, &local_obj_desc, 16);
138         if (ACPI_FAILURE(status)) {
139                 goto cleanup;
140         }
141
142         if (ACPI_GET_OBJECT_TYPE(local_obj_desc) != ACPI_TYPE_INTEGER) {
143                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
144                                   "Bad predicate (not an integer) obj_desc=%p State=%p Type=%X\n",
145                                   obj_desc, walk_state,
146                                   ACPI_GET_OBJECT_TYPE(obj_desc)));
147
148                 status = AE_AML_OPERAND_TYPE;
149                 goto cleanup;
150         }
151
152         /* Truncate the predicate to 32-bits if necessary */
153
154         acpi_ex_truncate_for32bit_table(local_obj_desc);
155
156         /*
157          * Save the result of the predicate evaluation on
158          * the control stack
159          */
160         if (local_obj_desc->integer.value) {
161                 walk_state->control_state->common.value = TRUE;
162         } else {
163                 /*
164                  * Predicate is FALSE, we will just toss the
165                  * rest of the package
166                  */
167                 walk_state->control_state->common.value = FALSE;
168                 status = AE_CTRL_FALSE;
169         }
170
171       cleanup:
172
173         ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Completed a predicate eval=%X Op=%p\n",
174                           walk_state->control_state->common.value,
175                           walk_state->op));
176
177         /* Break to debugger to display result */
178
179         ACPI_DEBUGGER_EXEC(acpi_db_display_result_object
180                            (local_obj_desc, walk_state));
181
182         /*
183          * Delete the predicate result object (we know that
184          * we don't need it anymore)
185          */
186         if (local_obj_desc != obj_desc) {
187                 acpi_ut_remove_reference(local_obj_desc);
188         }
189         acpi_ut_remove_reference(obj_desc);
190
191         walk_state->control_state->common.state = ACPI_CONTROL_NORMAL;
192         return_ACPI_STATUS(status);
193 }
194
195 /*****************************************************************************
196  *
197  * FUNCTION:    acpi_ds_exec_begin_op
198  *
199  * PARAMETERS:  walk_state      - Current state of the parse tree walk
200  *              out_op          - Where to return op if a new one is created
201  *
202  * RETURN:      Status
203  *
204  * DESCRIPTION: Descending callback used during the execution of control
205  *              methods.  This is where most operators and operands are
206  *              dispatched to the interpreter.
207  *
208  ****************************************************************************/
209
210 acpi_status
211 acpi_ds_exec_begin_op(struct acpi_walk_state *walk_state,
212                       union acpi_parse_object **out_op)
213 {
214         union acpi_parse_object *op;
215         acpi_status status = AE_OK;
216         u32 opcode_class;
217
218         ACPI_FUNCTION_TRACE_PTR("ds_exec_begin_op", walk_state);
219
220         op = walk_state->op;
221         if (!op) {
222                 status = acpi_ds_load2_begin_op(walk_state, out_op);
223                 if (ACPI_FAILURE(status)) {
224                         return_ACPI_STATUS(status);
225                 }
226
227                 op = *out_op;
228                 walk_state->op = op;
229                 walk_state->opcode = op->common.aml_opcode;
230                 walk_state->op_info =
231                     acpi_ps_get_opcode_info(op->common.aml_opcode);
232
233                 if (acpi_ns_opens_scope(walk_state->op_info->object_type)) {
234                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
235                                           "(%s) Popping scope for Op %p\n",
236                                           acpi_ut_get_type_name(walk_state->
237                                                                 op_info->
238                                                                 object_type),
239                                           op));
240
241                         status = acpi_ds_scope_stack_pop(walk_state);
242                         if (ACPI_FAILURE(status)) {
243                                 return_ACPI_STATUS(status);
244                         }
245                 }
246         }
247
248         if (op == walk_state->origin) {
249                 if (out_op) {
250                         *out_op = op;
251                 }
252
253                 return_ACPI_STATUS(AE_OK);
254         }
255
256         /*
257          * If the previous opcode was a conditional, this opcode
258          * must be the beginning of the associated predicate.
259          * Save this knowledge in the current scope descriptor
260          */
261         if ((walk_state->control_state) &&
262             (walk_state->control_state->common.state ==
263              ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
264                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
265                                   "Exec predicate Op=%p State=%p\n", op,
266                                   walk_state));
267
268                 walk_state->control_state->common.state =
269                     ACPI_CONTROL_PREDICATE_EXECUTING;
270
271                 /* Save start of predicate */
272
273                 walk_state->control_state->control.predicate_op = op;
274         }
275
276         opcode_class = walk_state->op_info->class;
277
278         /* We want to send namepaths to the load code */
279
280         if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
281                 opcode_class = AML_CLASS_NAMED_OBJECT;
282         }
283
284         /*
285          * Handle the opcode based upon the opcode type
286          */
287         switch (opcode_class) {
288         case AML_CLASS_CONTROL:
289
290                 status = acpi_ds_result_stack_push(walk_state);
291                 if (ACPI_FAILURE(status)) {
292                         return_ACPI_STATUS(status);
293                 }
294
295                 status = acpi_ds_exec_begin_control_op(walk_state, op);
296                 break;
297
298         case AML_CLASS_NAMED_OBJECT:
299
300                 if (walk_state->walk_type == ACPI_WALK_METHOD) {
301                         /*
302                          * Found a named object declaration during method execution;
303                          * we must enter this object into the namespace.  The created
304                          * object is temporary and will be deleted upon completion of
305                          * the execution of this method.
306                          */
307                         status = acpi_ds_load2_begin_op(walk_state, NULL);
308                 }
309
310                 if (op->common.aml_opcode == AML_REGION_OP) {
311                         status = acpi_ds_result_stack_push(walk_state);
312                 }
313                 break;
314
315         case AML_CLASS_EXECUTE:
316         case AML_CLASS_CREATE:
317
318                 /*
319                  * Most operators with arguments.
320                  * Start a new result/operand state
321                  */
322                 status = acpi_ds_result_stack_push(walk_state);
323                 break;
324
325         default:
326                 break;
327         }
328
329         /* Nothing to do here during method execution */
330
331         return_ACPI_STATUS(status);
332 }
333
334 /*****************************************************************************
335  *
336  * FUNCTION:    acpi_ds_exec_end_op
337  *
338  * PARAMETERS:  walk_state      - Current state of the parse tree walk
339  *
340  * RETURN:      Status
341  *
342  * DESCRIPTION: Ascending callback used during the execution of control
343  *              methods.  The only thing we really need to do here is to
344  *              notice the beginning of IF, ELSE, and WHILE blocks.
345  *
346  ****************************************************************************/
347
348 acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state)
349 {
350         union acpi_parse_object *op;
351         acpi_status status = AE_OK;
352         u32 op_type;
353         u32 op_class;
354         union acpi_parse_object *next_op;
355         union acpi_parse_object *first_arg;
356
357         ACPI_FUNCTION_TRACE_PTR("ds_exec_end_op", walk_state);
358
359         op = walk_state->op;
360         op_type = walk_state->op_info->type;
361         op_class = walk_state->op_info->class;
362
363         if (op_class == AML_CLASS_UNKNOWN) {
364                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unknown opcode %X\n",
365                                   op->common.aml_opcode));
366                 return_ACPI_STATUS(AE_NOT_IMPLEMENTED);
367         }
368
369         first_arg = op->common.value.arg;
370
371         /* Init the walk state */
372
373         walk_state->num_operands = 0;
374         walk_state->return_desc = NULL;
375         walk_state->result_obj = NULL;
376
377         /* Call debugger for single step support (DEBUG build only) */
378
379         ACPI_DEBUGGER_EXEC(status =
380                            acpi_db_single_step(walk_state, op, op_class));
381         ACPI_DEBUGGER_EXEC(if (ACPI_FAILURE(status)) {
382                            return_ACPI_STATUS(status);}
383         ) ;
384
385         /* Decode the Opcode Class */
386
387         switch (op_class) {
388         case AML_CLASS_ARGUMENT:        /* constants, literals, etc. - do nothing */
389                 break;
390
391         case AML_CLASS_EXECUTE: /* most operators with arguments */
392
393                 /* Build resolved operand stack */
394
395                 status = acpi_ds_create_operands(walk_state, first_arg);
396                 if (ACPI_FAILURE(status)) {
397                         goto cleanup;
398                 }
399
400                 /* Done with this result state (Now that operand stack is built) */
401
402                 status = acpi_ds_result_stack_pop(walk_state);
403                 if (ACPI_FAILURE(status)) {
404                         goto cleanup;
405                 }
406
407                 /*
408                  * All opcodes require operand resolution, with the only exceptions
409                  * being the object_type and size_of operators.
410                  */
411                 if (!(walk_state->op_info->flags & AML_NO_OPERAND_RESOLVE)) {
412                         /* Resolve all operands */
413
414                         status = acpi_ex_resolve_operands(walk_state->opcode,
415                                                           &(walk_state->
416                                                             operands
417                                                             [walk_state->
418                                                              num_operands - 1]),
419                                                           walk_state);
420                         if (ACPI_SUCCESS(status)) {
421                                 ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS,
422                                                    ACPI_IMODE_EXECUTE,
423                                                    acpi_ps_get_opcode_name
424                                                    (walk_state->opcode),
425                                                    walk_state->num_operands,
426                                                    "after ex_resolve_operands");
427                         }
428                 }
429
430                 if (ACPI_SUCCESS(status)) {
431                         /*
432                          * Dispatch the request to the appropriate interpreter handler
433                          * routine.  There is one routine per opcode "type" based upon the
434                          * number of opcode arguments and return type.
435                          */
436                         status =
437                             acpi_gbl_op_type_dispatch[op_type] (walk_state);
438                 } else {
439                         /*
440                          * Treat constructs of the form "Store(local_x,local_x)" as noops when the
441                          * Local is uninitialized.
442                          */
443                         if ((status == AE_AML_UNINITIALIZED_LOCAL) &&
444                             (walk_state->opcode == AML_STORE_OP) &&
445                             (walk_state->operands[0]->common.type ==
446                              ACPI_TYPE_LOCAL_REFERENCE)
447                             && (walk_state->operands[1]->common.type ==
448                                 ACPI_TYPE_LOCAL_REFERENCE)
449                             && (walk_state->operands[0]->reference.opcode ==
450                                 walk_state->operands[1]->reference.opcode)
451                             && (walk_state->operands[0]->reference.offset ==
452                                 walk_state->operands[1]->reference.offset)) {
453                                 status = AE_OK;
454                         } else {
455                                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
456                                                   "[%s]: Could not resolve operands, %s\n",
457                                                   acpi_ps_get_opcode_name
458                                                   (walk_state->opcode),
459                                                   acpi_format_exception
460                                                   (status)));
461                         }
462                 }
463
464                 /* Always delete the argument objects and clear the operand stack */
465
466                 acpi_ds_clear_operands(walk_state);
467
468                 /*
469                  * If a result object was returned from above, push it on the
470                  * current result stack
471                  */
472                 if (ACPI_SUCCESS(status) && walk_state->result_obj) {
473                         status =
474                             acpi_ds_result_push(walk_state->result_obj,
475                                                 walk_state);
476                 }
477
478                 break;
479
480         default:
481
482                 switch (op_type) {
483                 case AML_TYPE_CONTROL:  /* Type 1 opcode, IF/ELSE/WHILE/NOOP */
484
485                         /* 1 Operand, 0 external_result, 0 internal_result */
486
487                         status = acpi_ds_exec_end_control_op(walk_state, op);
488
489                         /* Make sure to properly pop the result stack */
490
491                         if (ACPI_SUCCESS(status)) {
492                                 status = acpi_ds_result_stack_pop(walk_state);
493                         } else if (status == AE_CTRL_PENDING) {
494                                 status = acpi_ds_result_stack_pop(walk_state);
495                                 if (ACPI_SUCCESS(status)) {
496                                         status = AE_CTRL_PENDING;
497                                 }
498                         }
499                         break;
500
501                 case AML_TYPE_METHOD_CALL:
502
503                         /*
504                          * If the method is referenced from within a package
505                          * declaration, it is not a invocation of the method, just
506                          * a reference to it.
507                          */
508                         if ((op->asl.parent) &&
509                             ((op->asl.parent->asl.aml_opcode == AML_PACKAGE_OP)
510                              || (op->asl.parent->asl.aml_opcode ==
511                                  AML_VAR_PACKAGE_OP))) {
512                                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
513                                                   "Method Reference in a Package, Op=%p\n",
514                                                   op));
515                                 op->common.node =
516                                     (struct acpi_namespace_node *)op->asl.value.
517                                     arg->asl.node->object;
518                                 acpi_ut_add_reference(op->asl.value.arg->asl.
519                                                       node->object);
520                                 return_ACPI_STATUS(AE_OK);
521                         }
522
523                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
524                                           "Method invocation, Op=%p\n", op));
525
526                         /*
527                          * (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains
528                          * the method Node pointer
529                          */
530                         /* next_op points to the op that holds the method name */
531
532                         next_op = first_arg;
533
534                         /* next_op points to first argument op */
535
536                         next_op = next_op->common.next;
537
538                         /*
539                          * Get the method's arguments and put them on the operand stack
540                          */
541                         status = acpi_ds_create_operands(walk_state, next_op);
542                         if (ACPI_FAILURE(status)) {
543                                 break;
544                         }
545
546                         /*
547                          * Since the operands will be passed to another control method,
548                          * we must resolve all local references here (Local variables,
549                          * arguments to *this* method, etc.)
550                          */
551                         status = acpi_ds_resolve_operands(walk_state);
552                         if (ACPI_FAILURE(status)) {
553                                 /* On error, clear all resolved operands */
554
555                                 acpi_ds_clear_operands(walk_state);
556                                 break;
557                         }
558
559                         /*
560                          * Tell the walk loop to preempt this running method and
561                          * execute the new method
562                          */
563                         status = AE_CTRL_TRANSFER;
564
565                         /*
566                          * Return now; we don't want to disturb anything,
567                          * especially the operand count!
568                          */
569                         return_ACPI_STATUS(status);
570
571                 case AML_TYPE_CREATE_FIELD:
572
573                         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
574                                           "Executing create_field Buffer/Index Op=%p\n",
575                                           op));
576
577                         status = acpi_ds_load2_end_op(walk_state);
578                         if (ACPI_FAILURE(status)) {
579                                 break;
580                         }
581
582                         status =
583                             acpi_ds_eval_buffer_field_operands(walk_state, op);
584                         break;
585
586                 case AML_TYPE_CREATE_OBJECT:
587
588                         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
589                                           "Executing create_object (Buffer/Package) Op=%p\n",
590                                           op));
591
592                         switch (op->common.parent->common.aml_opcode) {
593                         case AML_NAME_OP:
594
595                                 /*
596                                  * Put the Node on the object stack (Contains the ACPI Name
597                                  * of this object)
598                                  */
599                                 walk_state->operands[0] =
600                                     (void *)op->common.parent->common.node;
601                                 walk_state->num_operands = 1;
602
603                                 status = acpi_ds_create_node(walk_state,
604                                                              op->common.parent->
605                                                              common.node,
606                                                              op->common.parent);
607                                 if (ACPI_FAILURE(status)) {
608                                         break;
609                                 }
610
611                                 /* Fall through */
612                                 /*lint -fallthrough */
613
614                         case AML_INT_EVAL_SUBTREE_OP:
615
616                                 status =
617                                     acpi_ds_eval_data_object_operands
618                                     (walk_state, op,
619                                      acpi_ns_get_attached_object(op->common.
620                                                                  parent->common.
621                                                                  node));
622                                 break;
623
624                         default:
625
626                                 status =
627                                     acpi_ds_eval_data_object_operands
628                                     (walk_state, op, NULL);
629                                 break;
630                         }
631
632                         /* Done with result state (Now that operand stack is built) */
633
634                         status = acpi_ds_result_stack_pop(walk_state);
635                         if (ACPI_FAILURE(status)) {
636                                 goto cleanup;
637                         }
638
639                         /*
640                          * If a result object was returned from above, push it on the
641                          * current result stack
642                          */
643                         if (walk_state->result_obj) {
644                                 status =
645                                     acpi_ds_result_push(walk_state->result_obj,
646                                                         walk_state);
647                         }
648                         break;
649
650                 case AML_TYPE_NAMED_FIELD:
651                 case AML_TYPE_NAMED_COMPLEX:
652                 case AML_TYPE_NAMED_SIMPLE:
653                 case AML_TYPE_NAMED_NO_OBJ:
654
655                         status = acpi_ds_load2_end_op(walk_state);
656                         if (ACPI_FAILURE(status)) {
657                                 break;
658                         }
659
660                         if (op->common.aml_opcode == AML_REGION_OP) {
661                                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
662                                                   "Executing op_region Address/Length Op=%p\n",
663                                                   op));
664
665                                 status =
666                                     acpi_ds_eval_region_operands(walk_state,
667                                                                  op);
668                                 if (ACPI_FAILURE(status)) {
669                                         break;
670                                 }
671
672                                 status = acpi_ds_result_stack_pop(walk_state);
673                         }
674
675                         break;
676
677                 case AML_TYPE_UNDEFINED:
678
679                         ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
680                                           "Undefined opcode type Op=%p\n", op));
681                         return_ACPI_STATUS(AE_NOT_IMPLEMENTED);
682
683                 case AML_TYPE_BOGUS:
684
685                         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
686                                           "Internal opcode=%X type Op=%p\n",
687                                           walk_state->opcode, op));
688                         break;
689
690                 default:
691
692                         ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
693                                           "Unimplemented opcode, class=%X type=%X Opcode=%X Op=%p\n",
694                                           op_class, op_type,
695                                           op->common.aml_opcode, op));
696
697                         status = AE_NOT_IMPLEMENTED;
698                         break;
699                 }
700         }
701
702         /*
703          * ACPI 2.0 support for 64-bit integers: Truncate numeric
704          * result value if we are executing from a 32-bit ACPI table
705          */
706         acpi_ex_truncate_for32bit_table(walk_state->result_obj);
707
708         /*
709          * Check if we just completed the evaluation of a
710          * conditional predicate
711          */
712
713         if ((ACPI_SUCCESS(status)) &&
714             (walk_state->control_state) &&
715             (walk_state->control_state->common.state ==
716              ACPI_CONTROL_PREDICATE_EXECUTING) &&
717             (walk_state->control_state->control.predicate_op == op)) {
718                 status =
719                     acpi_ds_get_predicate_value(walk_state,
720                                                 walk_state->result_obj);
721                 walk_state->result_obj = NULL;
722         }
723
724       cleanup:
725
726         /* Invoke exception handler on error */
727
728         if (ACPI_FAILURE(status) &&
729             acpi_gbl_exception_handler && !(status & AE_CODE_CONTROL)) {
730                 acpi_ex_exit_interpreter();
731                 status = acpi_gbl_exception_handler(status,
732                                                     walk_state->method_node->
733                                                     name.integer,
734                                                     walk_state->opcode,
735                                                     walk_state->aml_offset,
736                                                     NULL);
737                 (void)acpi_ex_enter_interpreter();
738         }
739
740         if (walk_state->result_obj) {
741                 /* Break to debugger to display result */
742
743                 ACPI_DEBUGGER_EXEC(acpi_db_display_result_object
744                                    (walk_state->result_obj, walk_state));
745
746                 /*
747                  * Delete the result op if and only if:
748                  * Parent will not use the result -- such as any
749                  * non-nested type2 op in a method (parent will be method)
750                  */
751                 acpi_ds_delete_result_if_not_used(op, walk_state->result_obj,
752                                                   walk_state);
753         }
754 #ifdef _UNDER_DEVELOPMENT
755
756         if (walk_state->parser_state.aml == walk_state->parser_state.aml_end) {
757                 acpi_db_method_end(walk_state);
758         }
759 #endif
760
761         /* Always clear the object stack */
762
763         walk_state->num_operands = 0;
764
765 #ifdef ACPI_DISASSEMBLER
766
767         /* On error, display method locals/args */
768
769         if (ACPI_FAILURE(status)) {
770                 acpi_dm_dump_method_info(status, walk_state, op);
771         }
772 #endif
773
774         return_ACPI_STATUS(status);
775 }