1 /******************************************************************************
2  *
3  * Module Name: dswexec - Dispatcher method execution callbacks;
4  *                        dispatch to interpreter.
5  *
6  *****************************************************************************/
7 
8 /*
9  * Copyright (C) 2000 - 2012, Intel Corp.
10  * All rights reserved.
11  *
12  * Redistribution and use in source and binary forms, with or without
13  * modification, are permitted provided that the following conditions
14  * are met:
15  * 1. Redistributions of source code must retain the above copyright
16  *    notice, this list of conditions, and the following disclaimer,
17  *    without modification.
18  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
19  *    substantially similar to the "NO WARRANTY" disclaimer below
20  *    ("Disclaimer") and any redistribution must be conditioned upon
21  *    including a substantially similar Disclaimer requirement for further
22  *    binary redistribution.
23  * 3. Neither the names of the above-listed copyright holders nor the names
24  *    of any contributors may be used to endorse or promote products derived
25  *    from this software without specific prior written permission.
26  *
27  * Alternatively, this software may be distributed under the terms of the
28  * GNU General Public License ("GPL") version 2 as published by the Free
29  * Software Foundation.
30  *
31  * NO WARRANTY
32  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
35  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
36  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
41  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42  * POSSIBILITY OF SUCH DAMAGES.
43  */
44 
45 #include <acpi/acpi.h>
46 #include "accommon.h"
47 #include "acparser.h"
48 #include "amlcode.h"
49 #include "acdispat.h"
50 #include "acinterp.h"
51 #include "acnamesp.h"
52 #include "acdebug.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
acpi_ds_get_predicate_value(struct acpi_walk_state * walk_state,union acpi_operand_object * result_obj)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_EXCEPTION((AE_INFO, status,
104 					"Could not get result from predicate evaluation"));
105 
106 			return_ACPI_STATUS(status);
107 		}
108 	} else {
109 		status = acpi_ds_create_operand(walk_state, walk_state->op, 0);
110 		if (ACPI_FAILURE(status)) {
111 			return_ACPI_STATUS(status);
112 		}
113 
114 		status =
115 		    acpi_ex_resolve_to_value(&walk_state->operands[0],
116 					     walk_state);
117 		if (ACPI_FAILURE(status)) {
118 			return_ACPI_STATUS(status);
119 		}
120 
121 		obj_desc = walk_state->operands[0];
122 	}
123 
124 	if (!obj_desc) {
125 		ACPI_ERROR((AE_INFO,
126 			    "No predicate ObjDesc=%p State=%p",
127 			    obj_desc, walk_state));
128 
129 		return_ACPI_STATUS(AE_AML_NO_OPERAND);
130 	}
131 
132 	/*
133 	 * Result of predicate evaluation must be an Integer
134 	 * object. Implicitly convert the argument if necessary.
135 	 */
136 	status = acpi_ex_convert_to_integer(obj_desc, &local_obj_desc, 16);
137 	if (ACPI_FAILURE(status)) {
138 		goto cleanup;
139 	}
140 
141 	if (local_obj_desc->common.type != ACPI_TYPE_INTEGER) {
142 		ACPI_ERROR((AE_INFO,
143 			    "Bad predicate (not an integer) ObjDesc=%p State=%p Type=0x%X",
144 			    obj_desc, walk_state, obj_desc->common.type));
145 
146 		status = AE_AML_OPERAND_TYPE;
147 		goto cleanup;
148 	}
149 
150 	/* Truncate the predicate to 32-bits if necessary */
151 
152 	acpi_ex_truncate_for32bit_table(local_obj_desc);
153 
154 	/*
155 	 * Save the result of the predicate evaluation on
156 	 * the control stack
157 	 */
158 	if (local_obj_desc->integer.value) {
159 		walk_state->control_state->common.value = TRUE;
160 	} else {
161 		/*
162 		 * Predicate is FALSE, we will just toss the
163 		 * rest of the package
164 		 */
165 		walk_state->control_state->common.value = FALSE;
166 		status = AE_CTRL_FALSE;
167 	}
168 
169 	/* Predicate can be used for an implicit return value */
170 
171 	(void)acpi_ds_do_implicit_return(local_obj_desc, walk_state, TRUE);
172 
173       cleanup:
174 
175 	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Completed a predicate eval=%X Op=%p\n",
176 			  walk_state->control_state->common.value,
177 			  walk_state->op));
178 
179 	/* Break to debugger to display result */
180 
181 	ACPI_DEBUGGER_EXEC(acpi_db_display_result_object
182 			   (local_obj_desc, walk_state));
183 
184 	/*
185 	 * Delete the predicate result object (we know that
186 	 * we don't need it anymore)
187 	 */
188 	if (local_obj_desc != obj_desc) {
189 		acpi_ut_remove_reference(local_obj_desc);
190 	}
191 	acpi_ut_remove_reference(obj_desc);
192 
193 	walk_state->control_state->common.state = ACPI_CONTROL_NORMAL;
194 	return_ACPI_STATUS(status);
195 }
196 
197 /*****************************************************************************
198  *
199  * FUNCTION:    acpi_ds_exec_begin_op
200  *
201  * PARAMETERS:  walk_state      - Current state of the parse tree walk
202  *              out_op          - Where to return op if a new one is created
203  *
204  * RETURN:      Status
205  *
206  * DESCRIPTION: Descending callback used during the execution of control
207  *              methods.  This is where most operators and operands are
208  *              dispatched to the interpreter.
209  *
210  ****************************************************************************/
211 
212 acpi_status
acpi_ds_exec_begin_op(struct acpi_walk_state * walk_state,union acpi_parse_object ** out_op)213 acpi_ds_exec_begin_op(struct acpi_walk_state *walk_state,
214 		      union acpi_parse_object **out_op)
215 {
216 	union acpi_parse_object *op;
217 	acpi_status status = AE_OK;
218 	u32 opcode_class;
219 
220 	ACPI_FUNCTION_TRACE_PTR(ds_exec_begin_op, walk_state);
221 
222 	op = walk_state->op;
223 	if (!op) {
224 		status = acpi_ds_load2_begin_op(walk_state, out_op);
225 		if (ACPI_FAILURE(status)) {
226 			goto error_exit;
227 		}
228 
229 		op = *out_op;
230 		walk_state->op = op;
231 		walk_state->opcode = op->common.aml_opcode;
232 		walk_state->op_info =
233 		    acpi_ps_get_opcode_info(op->common.aml_opcode);
234 
235 		if (acpi_ns_opens_scope(walk_state->op_info->object_type)) {
236 			ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
237 					  "(%s) Popping scope for Op %p\n",
238 					  acpi_ut_get_type_name(walk_state->
239 								op_info->
240 								object_type),
241 					  op));
242 
243 			status = acpi_ds_scope_stack_pop(walk_state);
244 			if (ACPI_FAILURE(status)) {
245 				goto error_exit;
246 			}
247 		}
248 	}
249 
250 	if (op == walk_state->origin) {
251 		if (out_op) {
252 			*out_op = op;
253 		}
254 
255 		return_ACPI_STATUS(AE_OK);
256 	}
257 
258 	/*
259 	 * If the previous opcode was a conditional, this opcode
260 	 * must be the beginning of the associated predicate.
261 	 * Save this knowledge in the current scope descriptor
262 	 */
263 	if ((walk_state->control_state) &&
264 	    (walk_state->control_state->common.state ==
265 	     ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
266 		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
267 				  "Exec predicate Op=%p State=%p\n", op,
268 				  walk_state));
269 
270 		walk_state->control_state->common.state =
271 		    ACPI_CONTROL_PREDICATE_EXECUTING;
272 
273 		/* Save start of predicate */
274 
275 		walk_state->control_state->control.predicate_op = op;
276 	}
277 
278 	opcode_class = walk_state->op_info->class;
279 
280 	/* We want to send namepaths to the load code */
281 
282 	if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
283 		opcode_class = AML_CLASS_NAMED_OBJECT;
284 	}
285 
286 	/*
287 	 * Handle the opcode based upon the opcode type
288 	 */
289 	switch (opcode_class) {
290 	case AML_CLASS_CONTROL:
291 
292 		status = acpi_ds_exec_begin_control_op(walk_state, op);
293 		break;
294 
295 	case AML_CLASS_NAMED_OBJECT:
296 
297 		if (walk_state->walk_type & ACPI_WALK_METHOD) {
298 			/*
299 			 * Found a named object declaration during method execution;
300 			 * we must enter this object into the namespace.  The created
301 			 * object is temporary and will be deleted upon completion of
302 			 * the execution of this method.
303 			 *
304 			 * Note 10/2010: Except for the Scope() op. This opcode does
305 			 * not actually create a new object, it refers to an existing
306 			 * object. However, for Scope(), we want to indeed open a
307 			 * new scope.
308 			 */
309 			if (op->common.aml_opcode != AML_SCOPE_OP) {
310 				status =
311 				    acpi_ds_load2_begin_op(walk_state, NULL);
312 			} else {
313 				status =
314 				    acpi_ds_scope_stack_push(op->named.node,
315 							     op->named.node->
316 							     type, walk_state);
317 				if (ACPI_FAILURE(status)) {
318 					return_ACPI_STATUS(status);
319 				}
320 			}
321 		}
322 		break;
323 
324 	case AML_CLASS_EXECUTE:
325 	case AML_CLASS_CREATE:
326 
327 		break;
328 
329 	default:
330 		break;
331 	}
332 
333 	/* Nothing to do here during method execution */
334 
335 	return_ACPI_STATUS(status);
336 
337       error_exit:
338 	status = acpi_ds_method_error(status, walk_state);
339 	return_ACPI_STATUS(status);
340 }
341 
342 /*****************************************************************************
343  *
344  * FUNCTION:    acpi_ds_exec_end_op
345  *
346  * PARAMETERS:  walk_state      - Current state of the parse tree walk
347  *
348  * RETURN:      Status
349  *
350  * DESCRIPTION: Ascending callback used during the execution of control
351  *              methods.  The only thing we really need to do here is to
352  *              notice the beginning of IF, ELSE, and WHILE blocks.
353  *
354  ****************************************************************************/
355 
acpi_ds_exec_end_op(struct acpi_walk_state * walk_state)356 acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state)
357 {
358 	union acpi_parse_object *op;
359 	acpi_status status = AE_OK;
360 	u32 op_type;
361 	u32 op_class;
362 	union acpi_parse_object *next_op;
363 	union acpi_parse_object *first_arg;
364 
365 	ACPI_FUNCTION_TRACE_PTR(ds_exec_end_op, walk_state);
366 
367 	op = walk_state->op;
368 	op_type = walk_state->op_info->type;
369 	op_class = walk_state->op_info->class;
370 
371 	if (op_class == AML_CLASS_UNKNOWN) {
372 		ACPI_ERROR((AE_INFO, "Unknown opcode 0x%X",
373 			    op->common.aml_opcode));
374 		return_ACPI_STATUS(AE_NOT_IMPLEMENTED);
375 	}
376 
377 	first_arg = op->common.value.arg;
378 
379 	/* Init the walk state */
380 
381 	walk_state->num_operands = 0;
382 	walk_state->operand_index = 0;
383 	walk_state->return_desc = NULL;
384 	walk_state->result_obj = NULL;
385 
386 	/* Call debugger for single step support (DEBUG build only) */
387 
388 	ACPI_DEBUGGER_EXEC(status =
389 			   acpi_db_single_step(walk_state, op, op_class));
390 	ACPI_DEBUGGER_EXEC(if (ACPI_FAILURE(status)) {
391 			   return_ACPI_STATUS(status);}
392 	) ;
393 
394 	/* Decode the Opcode Class */
395 
396 	switch (op_class) {
397 	case AML_CLASS_ARGUMENT:	/* Constants, literals, etc. */
398 
399 		if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
400 			status = acpi_ds_evaluate_name_path(walk_state);
401 			if (ACPI_FAILURE(status)) {
402 				goto cleanup;
403 			}
404 		}
405 		break;
406 
407 	case AML_CLASS_EXECUTE:	/* Most operators with arguments */
408 
409 		/* Build resolved operand stack */
410 
411 		status = acpi_ds_create_operands(walk_state, first_arg);
412 		if (ACPI_FAILURE(status)) {
413 			goto cleanup;
414 		}
415 
416 		/*
417 		 * All opcodes require operand resolution, with the only exceptions
418 		 * being the object_type and size_of operators.
419 		 */
420 		if (!(walk_state->op_info->flags & AML_NO_OPERAND_RESOLVE)) {
421 
422 			/* Resolve all operands */
423 
424 			status = acpi_ex_resolve_operands(walk_state->opcode,
425 							  &(walk_state->
426 							    operands
427 							    [walk_state->
428 							     num_operands - 1]),
429 							  walk_state);
430 		}
431 
432 		if (ACPI_SUCCESS(status)) {
433 			/*
434 			 * Dispatch the request to the appropriate interpreter handler
435 			 * routine.  There is one routine per opcode "type" based upon the
436 			 * number of opcode arguments and return type.
437 			 */
438 			status =
439 			    acpi_gbl_op_type_dispatch[op_type] (walk_state);
440 		} else {
441 			/*
442 			 * Treat constructs of the form "Store(LocalX,LocalX)" as noops when the
443 			 * Local is uninitialized.
444 			 */
445 			if ((status == AE_AML_UNINITIALIZED_LOCAL) &&
446 			    (walk_state->opcode == AML_STORE_OP) &&
447 			    (walk_state->operands[0]->common.type ==
448 			     ACPI_TYPE_LOCAL_REFERENCE)
449 			    && (walk_state->operands[1]->common.type ==
450 				ACPI_TYPE_LOCAL_REFERENCE)
451 			    && (walk_state->operands[0]->reference.class ==
452 				walk_state->operands[1]->reference.class)
453 			    && (walk_state->operands[0]->reference.value ==
454 				walk_state->operands[1]->reference.value)) {
455 				status = AE_OK;
456 			} else {
457 				ACPI_EXCEPTION((AE_INFO, status,
458 						"While resolving operands for [%s]",
459 						acpi_ps_get_opcode_name
460 						(walk_state->opcode)));
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 		break;
478 
479 	default:
480 
481 		switch (op_type) {
482 		case AML_TYPE_CONTROL:	/* Type 1 opcode, IF/ELSE/WHILE/NOOP */
483 
484 			/* 1 Operand, 0 external_result, 0 internal_result */
485 
486 			status = acpi_ds_exec_end_control_op(walk_state, op);
487 
488 			break;
489 
490 		case AML_TYPE_METHOD_CALL:
491 
492 			/*
493 			 * If the method is referenced from within a package
494 			 * declaration, it is not a invocation of the method, just
495 			 * a reference to it.
496 			 */
497 			if ((op->asl.parent) &&
498 			    ((op->asl.parent->asl.aml_opcode == AML_PACKAGE_OP)
499 			     || (op->asl.parent->asl.aml_opcode ==
500 				 AML_VAR_PACKAGE_OP))) {
501 				ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
502 						  "Method Reference in a Package, Op=%p\n",
503 						  op));
504 
505 				op->common.node =
506 				    (struct acpi_namespace_node *)op->asl.value.
507 				    arg->asl.node;
508 				acpi_ut_add_reference(op->asl.value.arg->asl.
509 						      node->object);
510 				return_ACPI_STATUS(AE_OK);
511 			}
512 
513 			ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
514 					  "Method invocation, Op=%p\n", op));
515 
516 			/*
517 			 * (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains
518 			 * the method Node pointer
519 			 */
520 			/* next_op points to the op that holds the method name */
521 
522 			next_op = first_arg;
523 
524 			/* next_op points to first argument op */
525 
526 			next_op = next_op->common.next;
527 
528 			/*
529 			 * Get the method's arguments and put them on the operand stack
530 			 */
531 			status = acpi_ds_create_operands(walk_state, next_op);
532 			if (ACPI_FAILURE(status)) {
533 				break;
534 			}
535 
536 			/*
537 			 * Since the operands will be passed to another control method,
538 			 * we must resolve all local references here (Local variables,
539 			 * arguments to *this* method, etc.)
540 			 */
541 			status = acpi_ds_resolve_operands(walk_state);
542 			if (ACPI_FAILURE(status)) {
543 
544 				/* On error, clear all resolved operands */
545 
546 				acpi_ds_clear_operands(walk_state);
547 				break;
548 			}
549 
550 			/*
551 			 * Tell the walk loop to preempt this running method and
552 			 * execute the new method
553 			 */
554 			status = AE_CTRL_TRANSFER;
555 
556 			/*
557 			 * Return now; we don't want to disturb anything,
558 			 * especially the operand count!
559 			 */
560 			return_ACPI_STATUS(status);
561 
562 		case AML_TYPE_CREATE_FIELD:
563 
564 			ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
565 					  "Executing CreateField Buffer/Index Op=%p\n",
566 					  op));
567 
568 			status = acpi_ds_load2_end_op(walk_state);
569 			if (ACPI_FAILURE(status)) {
570 				break;
571 			}
572 
573 			status =
574 			    acpi_ds_eval_buffer_field_operands(walk_state, op);
575 			break;
576 
577 		case AML_TYPE_CREATE_OBJECT:
578 
579 			ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
580 					  "Executing CreateObject (Buffer/Package) Op=%p\n",
581 					  op));
582 
583 			switch (op->common.parent->common.aml_opcode) {
584 			case AML_NAME_OP:
585 
586 				/*
587 				 * Put the Node on the object stack (Contains the ACPI Name
588 				 * of this object)
589 				 */
590 				walk_state->operands[0] =
591 				    (void *)op->common.parent->common.node;
592 				walk_state->num_operands = 1;
593 
594 				status = acpi_ds_create_node(walk_state,
595 							     op->common.parent->
596 							     common.node,
597 							     op->common.parent);
598 				if (ACPI_FAILURE(status)) {
599 					break;
600 				}
601 
602 				/* Fall through */
603 				/*lint -fallthrough */
604 
605 			case AML_INT_EVAL_SUBTREE_OP:
606 
607 				status =
608 				    acpi_ds_eval_data_object_operands
609 				    (walk_state, op,
610 				     acpi_ns_get_attached_object(op->common.
611 								 parent->common.
612 								 node));
613 				break;
614 
615 			default:
616 
617 				status =
618 				    acpi_ds_eval_data_object_operands
619 				    (walk_state, op, NULL);
620 				break;
621 			}
622 
623 			/*
624 			 * If a result object was returned from above, push it on the
625 			 * current result stack
626 			 */
627 			if (walk_state->result_obj) {
628 				status =
629 				    acpi_ds_result_push(walk_state->result_obj,
630 							walk_state);
631 			}
632 			break;
633 
634 		case AML_TYPE_NAMED_FIELD:
635 		case AML_TYPE_NAMED_COMPLEX:
636 		case AML_TYPE_NAMED_SIMPLE:
637 		case AML_TYPE_NAMED_NO_OBJ:
638 
639 			status = acpi_ds_load2_end_op(walk_state);
640 			if (ACPI_FAILURE(status)) {
641 				break;
642 			}
643 
644 			if (op->common.aml_opcode == AML_REGION_OP) {
645 				ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
646 						  "Executing OpRegion Address/Length Op=%p\n",
647 						  op));
648 
649 				status =
650 				    acpi_ds_eval_region_operands(walk_state,
651 								 op);
652 				if (ACPI_FAILURE(status)) {
653 					break;
654 				}
655 			} else if (op->common.aml_opcode == AML_DATA_REGION_OP) {
656 				ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
657 						  "Executing DataTableRegion Strings Op=%p\n",
658 						  op));
659 
660 				status =
661 				    acpi_ds_eval_table_region_operands
662 				    (walk_state, op);
663 				if (ACPI_FAILURE(status)) {
664 					break;
665 				}
666 			} else if (op->common.aml_opcode == AML_BANK_FIELD_OP) {
667 				ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
668 						  "Executing BankField Op=%p\n",
669 						  op));
670 
671 				status =
672 				    acpi_ds_eval_bank_field_operands(walk_state,
673 								     op);
674 				if (ACPI_FAILURE(status)) {
675 					break;
676 				}
677 			}
678 			break;
679 
680 		case AML_TYPE_UNDEFINED:
681 
682 			ACPI_ERROR((AE_INFO,
683 				    "Undefined opcode type Op=%p", op));
684 			return_ACPI_STATUS(AE_NOT_IMPLEMENTED);
685 
686 		case AML_TYPE_BOGUS:
687 
688 			ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
689 					  "Internal opcode=%X type Op=%p\n",
690 					  walk_state->opcode, op));
691 			break;
692 
693 		default:
694 
695 			ACPI_ERROR((AE_INFO,
696 				    "Unimplemented opcode, class=0x%X type=0x%X Opcode=-0x%X Op=%p",
697 				    op_class, op_type, op->common.aml_opcode,
698 				    op));
699 
700 			status = AE_NOT_IMPLEMENTED;
701 			break;
702 		}
703 	}
704 
705 	/*
706 	 * ACPI 2.0 support for 64-bit integers: Truncate numeric
707 	 * result value if we are executing from a 32-bit ACPI table
708 	 */
709 	acpi_ex_truncate_for32bit_table(walk_state->result_obj);
710 
711 	/*
712 	 * Check if we just completed the evaluation of a
713 	 * conditional predicate
714 	 */
715 	if ((ACPI_SUCCESS(status)) &&
716 	    (walk_state->control_state) &&
717 	    (walk_state->control_state->common.state ==
718 	     ACPI_CONTROL_PREDICATE_EXECUTING) &&
719 	    (walk_state->control_state->control.predicate_op == op)) {
720 		status =
721 		    acpi_ds_get_predicate_value(walk_state,
722 						walk_state->result_obj);
723 		walk_state->result_obj = NULL;
724 	}
725 
726       cleanup:
727 
728 	if (walk_state->result_obj) {
729 
730 		/* Break to debugger to display result */
731 
732 		ACPI_DEBUGGER_EXEC(acpi_db_display_result_object
733 				   (walk_state->result_obj, walk_state));
734 
735 		/*
736 		 * Delete the result op if and only if:
737 		 * Parent will not use the result -- such as any
738 		 * non-nested type2 op in a method (parent will be method)
739 		 */
740 		acpi_ds_delete_result_if_not_used(op, walk_state->result_obj,
741 						  walk_state);
742 	}
743 #ifdef _UNDER_DEVELOPMENT
744 
745 	if (walk_state->parser_state.aml == walk_state->parser_state.aml_end) {
746 		acpi_db_method_end(walk_state);
747 	}
748 #endif
749 
750 	/* Invoke exception handler on error */
751 
752 	if (ACPI_FAILURE(status)) {
753 		status = acpi_ds_method_error(status, walk_state);
754 	}
755 
756 	/* Always clear the object stack */
757 
758 	walk_state->num_operands = 0;
759 	return_ACPI_STATUS(status);
760 }
761