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