xref: /titanic_41/usr/src/uts/intel/io/acpica/dispatcher/dswexec.c (revision de5d74c22760a6d2cefd94d0e7f0fd87214fb71f)
1 /******************************************************************************
2  *
3  * Module Name: dswexec - Dispatcher method execution callbacks;
4  *                        dispatch to interpreter.
5  *
6  *****************************************************************************/
7 
8 /*
9  * Copyright (C) 2000 - 2016, 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.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 
55 #define _COMPONENT          ACPI_DISPATCHER
56         ACPI_MODULE_NAME    ("dswexec")
57 
58 /*
59  * Dispatch table for opcode classes
60  */
61 static ACPI_EXECUTE_OP      AcpiGbl_OpTypeDispatch [] =
62 {
63     AcpiExOpcode_0A_0T_1R,
64     AcpiExOpcode_1A_0T_0R,
65     AcpiExOpcode_1A_0T_1R,
66     AcpiExOpcode_1A_1T_0R,
67     AcpiExOpcode_1A_1T_1R,
68     AcpiExOpcode_2A_0T_0R,
69     AcpiExOpcode_2A_0T_1R,
70     AcpiExOpcode_2A_1T_1R,
71     AcpiExOpcode_2A_2T_1R,
72     AcpiExOpcode_3A_0T_0R,
73     AcpiExOpcode_3A_1T_1R,
74     AcpiExOpcode_6A_0T_1R
75 };
76 
77 
78 /*****************************************************************************
79  *
80  * FUNCTION:    AcpiDsGetPredicateValue
81  *
82  * PARAMETERS:  WalkState       - Current state of the parse tree walk
83  *              ResultObj       - if non-zero, pop result from result stack
84  *
85  * RETURN:      Status
86  *
87  * DESCRIPTION: Get the result of a predicate evaluation
88  *
89  ****************************************************************************/
90 
91 ACPI_STATUS
AcpiDsGetPredicateValue(ACPI_WALK_STATE * WalkState,ACPI_OPERAND_OBJECT * ResultObj)92 AcpiDsGetPredicateValue (
93     ACPI_WALK_STATE         *WalkState,
94     ACPI_OPERAND_OBJECT     *ResultObj)
95 {
96     ACPI_STATUS             Status = AE_OK;
97     ACPI_OPERAND_OBJECT     *ObjDesc;
98     ACPI_OPERAND_OBJECT     *LocalObjDesc = NULL;
99 
100 
101     ACPI_FUNCTION_TRACE_PTR (DsGetPredicateValue, WalkState);
102 
103 
104     WalkState->ControlState->Common.State = 0;
105 
106     if (ResultObj)
107     {
108         Status = AcpiDsResultPop (&ObjDesc, WalkState);
109         if (ACPI_FAILURE (Status))
110         {
111             ACPI_EXCEPTION ((AE_INFO, Status,
112                 "Could not get result from predicate evaluation"));
113 
114             return_ACPI_STATUS (Status);
115         }
116     }
117     else
118     {
119         Status = AcpiDsCreateOperand (WalkState, WalkState->Op, 0);
120         if (ACPI_FAILURE (Status))
121         {
122             return_ACPI_STATUS (Status);
123         }
124 
125         Status = AcpiExResolveToValue (&WalkState->Operands [0], WalkState);
126         if (ACPI_FAILURE (Status))
127         {
128             return_ACPI_STATUS (Status);
129         }
130 
131         ObjDesc = WalkState->Operands [0];
132     }
133 
134     if (!ObjDesc)
135     {
136         ACPI_ERROR ((AE_INFO,
137             "No predicate ObjDesc=%p State=%p",
138             ObjDesc, WalkState));
139 
140         return_ACPI_STATUS (AE_AML_NO_OPERAND);
141     }
142 
143     /*
144      * Result of predicate evaluation must be an Integer
145      * object. Implicitly convert the argument if necessary.
146      */
147     Status = AcpiExConvertToInteger (ObjDesc, &LocalObjDesc, 16);
148     if (ACPI_FAILURE (Status))
149     {
150         goto Cleanup;
151     }
152 
153     if (LocalObjDesc->Common.Type != ACPI_TYPE_INTEGER)
154     {
155         ACPI_ERROR ((AE_INFO,
156             "Bad predicate (not an integer) ObjDesc=%p State=%p Type=0x%X",
157             ObjDesc, WalkState, ObjDesc->Common.Type));
158 
159         Status = AE_AML_OPERAND_TYPE;
160         goto Cleanup;
161     }
162 
163     /* Truncate the predicate to 32-bits if necessary */
164 
165     (void) AcpiExTruncateFor32bitTable (LocalObjDesc);
166 
167     /*
168      * Save the result of the predicate evaluation on
169      * the control stack
170      */
171     if (LocalObjDesc->Integer.Value)
172     {
173         WalkState->ControlState->Common.Value = TRUE;
174     }
175     else
176     {
177         /*
178          * Predicate is FALSE, we will just toss the
179          * rest of the package
180          */
181         WalkState->ControlState->Common.Value = FALSE;
182         Status = AE_CTRL_FALSE;
183     }
184 
185     /* Predicate can be used for an implicit return value */
186 
187     (void) AcpiDsDoImplicitReturn (LocalObjDesc, WalkState, TRUE);
188 
189 
190 Cleanup:
191 
192     ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
193         "Completed a predicate eval=%X Op=%p\n",
194         WalkState->ControlState->Common.Value, WalkState->Op));
195 
196 #ifdef ACPI_DEBUGGER
197     /* Break to debugger to display result */
198 
199     AcpiDbDisplayResultObject (LocalObjDesc, WalkState);
200 #endif
201 
202     /*
203      * Delete the predicate result object (we know that
204      * we don't need it anymore)
205      */
206     if (LocalObjDesc != ObjDesc)
207     {
208         AcpiUtRemoveReference (LocalObjDesc);
209     }
210     AcpiUtRemoveReference (ObjDesc);
211 
212     WalkState->ControlState->Common.State = ACPI_CONTROL_NORMAL;
213     return_ACPI_STATUS (Status);
214 }
215 
216 
217 /*****************************************************************************
218  *
219  * FUNCTION:    AcpiDsExecBeginOp
220  *
221  * PARAMETERS:  WalkState       - Current state of the parse tree walk
222  *              OutOp           - Where to return op if a new one is created
223  *
224  * RETURN:      Status
225  *
226  * DESCRIPTION: Descending callback used during the execution of control
227  *              methods. This is where most operators and operands are
228  *              dispatched to the interpreter.
229  *
230  ****************************************************************************/
231 
232 ACPI_STATUS
AcpiDsExecBeginOp(ACPI_WALK_STATE * WalkState,ACPI_PARSE_OBJECT ** OutOp)233 AcpiDsExecBeginOp (
234     ACPI_WALK_STATE         *WalkState,
235     ACPI_PARSE_OBJECT       **OutOp)
236 {
237     ACPI_PARSE_OBJECT       *Op;
238     ACPI_STATUS             Status = AE_OK;
239     UINT32                  OpcodeClass;
240 
241 
242     ACPI_FUNCTION_TRACE_PTR (DsExecBeginOp, WalkState);
243 
244 
245     Op = WalkState->Op;
246     if (!Op)
247     {
248         Status = AcpiDsLoad2BeginOp (WalkState, OutOp);
249         if (ACPI_FAILURE (Status))
250         {
251             goto ErrorExit;
252         }
253 
254         Op = *OutOp;
255         WalkState->Op = Op;
256         WalkState->Opcode = Op->Common.AmlOpcode;
257         WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
258 
259         if (AcpiNsOpensScope (WalkState->OpInfo->ObjectType))
260         {
261             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
262                 "(%s) Popping scope for Op %p\n",
263                 AcpiUtGetTypeName (WalkState->OpInfo->ObjectType), Op));
264 
265             Status = AcpiDsScopeStackPop (WalkState);
266             if (ACPI_FAILURE (Status))
267             {
268                 goto ErrorExit;
269             }
270         }
271     }
272 
273     if (Op == WalkState->Origin)
274     {
275         if (OutOp)
276         {
277             *OutOp = Op;
278         }
279 
280         return_ACPI_STATUS (AE_OK);
281     }
282 
283     /*
284      * If the previous opcode was a conditional, this opcode
285      * must be the beginning of the associated predicate.
286      * Save this knowledge in the current scope descriptor
287      */
288     if ((WalkState->ControlState) &&
289         (WalkState->ControlState->Common.State ==
290             ACPI_CONTROL_CONDITIONAL_EXECUTING))
291     {
292         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
293             "Exec predicate Op=%p State=%p\n",
294             Op, WalkState));
295 
296         WalkState->ControlState->Common.State =
297             ACPI_CONTROL_PREDICATE_EXECUTING;
298 
299         /* Save start of predicate */
300 
301         WalkState->ControlState->Control.PredicateOp = Op;
302     }
303 
304 
305     OpcodeClass = WalkState->OpInfo->Class;
306 
307     /* We want to send namepaths to the load code */
308 
309     if (Op->Common.AmlOpcode == AML_INT_NAMEPATH_OP)
310     {
311         OpcodeClass = AML_CLASS_NAMED_OBJECT;
312     }
313 
314     /*
315      * Handle the opcode based upon the opcode type
316      */
317     switch (OpcodeClass)
318     {
319     case AML_CLASS_CONTROL:
320 
321         Status = AcpiDsExecBeginControlOp (WalkState, Op);
322         break;
323 
324     case AML_CLASS_NAMED_OBJECT:
325 
326         if (WalkState->WalkType & ACPI_WALK_METHOD)
327         {
328             /*
329              * Found a named object declaration during method execution;
330              * we must enter this object into the namespace. The created
331              * object is temporary and will be deleted upon completion of
332              * the execution of this method.
333              *
334              * Note 10/2010: Except for the Scope() op. This opcode does
335              * not actually create a new object, it refers to an existing
336              * object. However, for Scope(), we want to indeed open a
337              * new scope.
338              */
339             if (Op->Common.AmlOpcode != AML_SCOPE_OP)
340             {
341                 Status = AcpiDsLoad2BeginOp (WalkState, NULL);
342             }
343             else
344             {
345                 Status = AcpiDsScopeStackPush (
346                     Op->Named.Node, Op->Named.Node->Type, WalkState);
347                 if (ACPI_FAILURE (Status))
348                 {
349                     return_ACPI_STATUS (Status);
350                 }
351             }
352         }
353         break;
354 
355     case AML_CLASS_EXECUTE:
356     case AML_CLASS_CREATE:
357 
358         break;
359 
360     default:
361 
362         break;
363     }
364 
365     /* Nothing to do here during method execution */
366 
367     return_ACPI_STATUS (Status);
368 
369 
370 ErrorExit:
371     Status = AcpiDsMethodError (Status, WalkState);
372     return_ACPI_STATUS (Status);
373 }
374 
375 
376 /*****************************************************************************
377  *
378  * FUNCTION:    AcpiDsExecEndOp
379  *
380  * PARAMETERS:  WalkState       - Current state of the parse tree walk
381  *
382  * RETURN:      Status
383  *
384  * DESCRIPTION: Ascending callback used during the execution of control
385  *              methods. The only thing we really need to do here is to
386  *              notice the beginning of IF, ELSE, and WHILE blocks.
387  *
388  ****************************************************************************/
389 
390 ACPI_STATUS
AcpiDsExecEndOp(ACPI_WALK_STATE * WalkState)391 AcpiDsExecEndOp (
392     ACPI_WALK_STATE         *WalkState)
393 {
394     ACPI_PARSE_OBJECT       *Op;
395     ACPI_STATUS             Status = AE_OK;
396     UINT32                  OpType;
397     UINT32                  OpClass;
398     ACPI_PARSE_OBJECT       *NextOp;
399     ACPI_PARSE_OBJECT       *FirstArg;
400 
401 
402     ACPI_FUNCTION_TRACE_PTR (DsExecEndOp, WalkState);
403 
404 
405     Op = WalkState->Op;
406     OpType = WalkState->OpInfo->Type;
407     OpClass = WalkState->OpInfo->Class;
408 
409     if (OpClass == AML_CLASS_UNKNOWN)
410     {
411         ACPI_ERROR ((AE_INFO, "Unknown opcode 0x%X", Op->Common.AmlOpcode));
412         return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
413     }
414 
415     FirstArg = Op->Common.Value.Arg;
416 
417     /* Init the walk state */
418 
419     WalkState->NumOperands = 0;
420     WalkState->OperandIndex = 0;
421     WalkState->ReturnDesc = NULL;
422     WalkState->ResultObj = NULL;
423 
424 #ifdef ACPI_DEBUGGER
425     /* Call debugger for single step support (DEBUG build only) */
426 
427     Status = AcpiDbSingleStep (WalkState, Op, OpClass);
428     if (ACPI_FAILURE (Status))
429     {
430         return_ACPI_STATUS (Status);
431     }
432 #endif
433 
434     /* Decode the Opcode Class */
435 
436     switch (OpClass)
437     {
438     case AML_CLASS_ARGUMENT:    /* Constants, literals, etc. */
439 
440         if (WalkState->Opcode == AML_INT_NAMEPATH_OP)
441         {
442             Status = AcpiDsEvaluateNamePath (WalkState);
443             if (ACPI_FAILURE (Status))
444             {
445                 goto Cleanup;
446             }
447         }
448         break;
449 
450     case AML_CLASS_EXECUTE:     /* Most operators with arguments */
451 
452         /* Build resolved operand stack */
453 
454         Status = AcpiDsCreateOperands (WalkState, FirstArg);
455         if (ACPI_FAILURE (Status))
456         {
457             goto Cleanup;
458         }
459 
460         /*
461          * All opcodes require operand resolution, with the only exceptions
462          * being the ObjectType and SizeOf operators.
463          */
464         if (!(WalkState->OpInfo->Flags & AML_NO_OPERAND_RESOLVE))
465         {
466             /* Resolve all operands */
467 
468             Status = AcpiExResolveOperands (WalkState->Opcode,
469                 &(WalkState->Operands [WalkState->NumOperands -1]),
470                 WalkState);
471         }
472 
473         if (ACPI_SUCCESS (Status))
474         {
475             /*
476              * Dispatch the request to the appropriate interpreter handler
477              * routine. There is one routine per opcode "type" based upon the
478              * number of opcode arguments and return type.
479              */
480             Status = AcpiGbl_OpTypeDispatch[OpType] (WalkState);
481         }
482         else
483         {
484             /*
485              * Treat constructs of the form "Store(LocalX,LocalX)" as noops when the
486              * Local is uninitialized.
487              */
488             if  ((Status == AE_AML_UNINITIALIZED_LOCAL) &&
489                 (WalkState->Opcode == AML_STORE_OP) &&
490                 (WalkState->Operands[0]->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&
491                 (WalkState->Operands[1]->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&
492                 (WalkState->Operands[0]->Reference.Class ==
493                  WalkState->Operands[1]->Reference.Class) &&
494                 (WalkState->Operands[0]->Reference.Value ==
495                  WalkState->Operands[1]->Reference.Value))
496             {
497                 Status = AE_OK;
498             }
499             else
500             {
501                 ACPI_EXCEPTION ((AE_INFO, Status,
502                     "While resolving operands for [%s]",
503                     AcpiPsGetOpcodeName (WalkState->Opcode)));
504             }
505         }
506 
507         /* Always delete the argument objects and clear the operand stack */
508 
509         AcpiDsClearOperands (WalkState);
510 
511         /*
512          * If a result object was returned from above, push it on the
513          * current result stack
514          */
515         if (ACPI_SUCCESS (Status) &&
516             WalkState->ResultObj)
517         {
518             Status = AcpiDsResultPush (WalkState->ResultObj, WalkState);
519         }
520         break;
521 
522     default:
523 
524         switch (OpType)
525         {
526         case AML_TYPE_CONTROL:    /* Type 1 opcode, IF/ELSE/WHILE/NOOP */
527 
528             /* 1 Operand, 0 ExternalResult, 0 InternalResult */
529 
530             Status = AcpiDsExecEndControlOp (WalkState, Op);
531 
532             break;
533 
534         case AML_TYPE_METHOD_CALL:
535             /*
536              * If the method is referenced from within a package
537              * declaration, it is not a invocation of the method, just
538              * a reference to it.
539              */
540             if ((Op->Asl.Parent) &&
541                ((Op->Asl.Parent->Asl.AmlOpcode == AML_PACKAGE_OP) ||
542                 (Op->Asl.Parent->Asl.AmlOpcode == AML_VAR_PACKAGE_OP)))
543             {
544                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
545                     "Method Reference in a Package, Op=%p\n", Op));
546 
547                 Op->Common.Node = (ACPI_NAMESPACE_NODE *)
548                     Op->Asl.Value.Arg->Asl.Node;
549                 AcpiUtAddReference (Op->Asl.Value.Arg->Asl.Node->Object);
550                 return_ACPI_STATUS (AE_OK);
551             }
552 
553             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
554                 "Method invocation, Op=%p\n", Op));
555 
556             /*
557              * (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains
558              * the method Node pointer
559              */
560             /* NextOp points to the op that holds the method name */
561 
562             NextOp = FirstArg;
563 
564             /* NextOp points to first argument op */
565 
566             NextOp = NextOp->Common.Next;
567 
568             /*
569              * Get the method's arguments and put them on the operand stack
570              */
571             Status = AcpiDsCreateOperands (WalkState, NextOp);
572             if (ACPI_FAILURE (Status))
573             {
574                 break;
575             }
576 
577             /*
578              * Since the operands will be passed to another control method,
579              * we must resolve all local references here (Local variables,
580              * arguments to *this* method, etc.)
581              */
582             Status = AcpiDsResolveOperands (WalkState);
583             if (ACPI_FAILURE (Status))
584             {
585                 /* On error, clear all resolved operands */
586 
587                 AcpiDsClearOperands (WalkState);
588                 break;
589             }
590 
591             /*
592              * Tell the walk loop to preempt this running method and
593              * execute the new method
594              */
595             Status = AE_CTRL_TRANSFER;
596 
597             /*
598              * Return now; we don't want to disturb anything,
599              * especially the operand count!
600              */
601             return_ACPI_STATUS (Status);
602 
603         case AML_TYPE_CREATE_FIELD:
604 
605             ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
606                 "Executing CreateField Buffer/Index Op=%p\n", Op));
607 
608             Status = AcpiDsLoad2EndOp (WalkState);
609             if (ACPI_FAILURE (Status))
610             {
611                 break;
612             }
613 
614             Status = AcpiDsEvalBufferFieldOperands (WalkState, Op);
615             break;
616 
617 
618         case AML_TYPE_CREATE_OBJECT:
619 
620             ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
621                 "Executing CreateObject (Buffer/Package) Op=%p\n", Op));
622 
623             switch (Op->Common.Parent->Common.AmlOpcode)
624             {
625             case AML_NAME_OP:
626                 /*
627                  * Put the Node on the object stack (Contains the ACPI Name
628                  * of this object)
629                  */
630                 WalkState->Operands[0] = (void *)
631                     Op->Common.Parent->Common.Node;
632                 WalkState->NumOperands = 1;
633 
634                 Status = AcpiDsCreateNode (WalkState,
635                     Op->Common.Parent->Common.Node, Op->Common.Parent);
636                 if (ACPI_FAILURE (Status))
637                 {
638                     break;
639                 }
640 
641                 /* Fall through */
642                 /*lint -fallthrough */
643 
644             case AML_INT_EVAL_SUBTREE_OP:
645 
646                 Status = AcpiDsEvalDataObjectOperands (WalkState, Op,
647                     AcpiNsGetAttachedObject (Op->Common.Parent->Common.Node));
648                 break;
649 
650             default:
651 
652                 Status = AcpiDsEvalDataObjectOperands (WalkState, Op, NULL);
653                 break;
654             }
655 
656             /*
657              * If a result object was returned from above, push it on the
658              * current result stack
659              */
660             if (WalkState->ResultObj)
661             {
662                 Status = AcpiDsResultPush (WalkState->ResultObj, WalkState);
663             }
664             break;
665 
666         case AML_TYPE_NAMED_FIELD:
667         case AML_TYPE_NAMED_COMPLEX:
668         case AML_TYPE_NAMED_SIMPLE:
669         case AML_TYPE_NAMED_NO_OBJ:
670 
671             Status = AcpiDsLoad2EndOp (WalkState);
672             if (ACPI_FAILURE (Status))
673             {
674                 break;
675             }
676 
677             if (Op->Common.AmlOpcode == AML_REGION_OP)
678             {
679                 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
680                     "Executing OpRegion Address/Length Op=%p\n", Op));
681 
682                 Status = AcpiDsEvalRegionOperands (WalkState, Op);
683                 if (ACPI_FAILURE (Status))
684                 {
685                     break;
686                 }
687             }
688             else if (Op->Common.AmlOpcode == AML_DATA_REGION_OP)
689             {
690                 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
691                     "Executing DataTableRegion Strings Op=%p\n", Op));
692 
693                 Status = AcpiDsEvalTableRegionOperands (WalkState, Op);
694                 if (ACPI_FAILURE (Status))
695                 {
696                     break;
697                 }
698             }
699             else if (Op->Common.AmlOpcode == AML_BANK_FIELD_OP)
700             {
701                 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
702                     "Executing BankField Op=%p\n", Op));
703 
704                 Status = AcpiDsEvalBankFieldOperands (WalkState, Op);
705                 if (ACPI_FAILURE (Status))
706                 {
707                     break;
708                 }
709             }
710             break;
711 
712         case AML_TYPE_UNDEFINED:
713 
714             ACPI_ERROR ((AE_INFO,
715                 "Undefined opcode type Op=%p", Op));
716             return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
717 
718         case AML_TYPE_BOGUS:
719 
720             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
721                 "Internal opcode=%X type Op=%p\n",
722                 WalkState->Opcode, Op));
723             break;
724 
725         default:
726 
727             ACPI_ERROR ((AE_INFO,
728                 "Unimplemented opcode, class=0x%X "
729                 "type=0x%X Opcode=0x%X Op=%p",
730                 OpClass, OpType, Op->Common.AmlOpcode, Op));
731 
732             Status = AE_NOT_IMPLEMENTED;
733             break;
734         }
735     }
736 
737     /*
738      * ACPI 2.0 support for 64-bit integers: Truncate numeric
739      * result value if we are executing from a 32-bit ACPI table
740      */
741     (void) AcpiExTruncateFor32bitTable (WalkState->ResultObj);
742 
743     /*
744      * Check if we just completed the evaluation of a
745      * conditional predicate
746      */
747     if ((ACPI_SUCCESS (Status)) &&
748         (WalkState->ControlState) &&
749         (WalkState->ControlState->Common.State ==
750             ACPI_CONTROL_PREDICATE_EXECUTING) &&
751         (WalkState->ControlState->Control.PredicateOp == Op))
752     {
753         Status = AcpiDsGetPredicateValue (WalkState, WalkState->ResultObj);
754         WalkState->ResultObj = NULL;
755     }
756 
757 
758 Cleanup:
759 
760     if (WalkState->ResultObj)
761     {
762 #ifdef ACPI_DEBUGGER
763         /* Break to debugger to display result */
764 
765         AcpiDbDisplayResultObject (WalkState->ResultObj,WalkState);
766 #endif
767 
768         /*
769          * Delete the result op if and only if:
770          * Parent will not use the result -- such as any
771          * non-nested type2 op in a method (parent will be method)
772          */
773         AcpiDsDeleteResultIfNotUsed (Op, WalkState->ResultObj, WalkState);
774     }
775 
776 #ifdef _UNDER_DEVELOPMENT
777 
778     if (WalkState->ParserState.Aml == WalkState->ParserState.AmlEnd)
779     {
780         AcpiDbMethodEnd (WalkState);
781     }
782 #endif
783 
784     /* Invoke exception handler on error */
785 
786     if (ACPI_FAILURE (Status))
787     {
788         Status = AcpiDsMethodError (Status, WalkState);
789     }
790 
791     /* Always clear the object stack */
792 
793     WalkState->NumOperands = 0;
794     return_ACPI_STATUS (Status);
795 }
796