arch/all-pc/acpica/source/components/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 - 2013, 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 #define __DSWEXEC_C__
  46
  47 #include "acpi.h"
  48 #include "accommon.h"
  49 #include "acparser.h"
  50 #include "amlcode.h"
  51 #include "acdispat.h"
  52 #include "acinterp.h"
  53 #include "acnamesp.h"
  54 #include "acdebug.h"
  55
  56
  57 #define _COMPONENT          ACPI_DISPATCHER
  58         ACPI_MODULE_NAME    ("dswexec")
  59
  60 /*
  61  * Dispatch table for opcode classes
  62  */
  63 static ACPI_EXECUTE_OP      AcpiGbl_OpTypeDispatch [] =
  64 {
  65     AcpiExOpcode_0A_0T_1R,
  66     AcpiExOpcode_1A_0T_0R,
  67     AcpiExOpcode_1A_0T_1R,
  68     AcpiExOpcode_1A_1T_0R,
  69     AcpiExOpcode_1A_1T_1R,
  70     AcpiExOpcode_2A_0T_0R,
  71     AcpiExOpcode_2A_0T_1R,
  72     AcpiExOpcode_2A_1T_1R,
  73     AcpiExOpcode_2A_2T_1R,
  74     AcpiExOpcode_3A_0T_0R,
  75     AcpiExOpcode_3A_1T_1R,
  76     AcpiExOpcode_6A_0T_1R
  77 };
  78
  79
  80 /*****************************************************************************
  81  *
  82  * FUNCTION:    AcpiDsGetPredicateValue
  83  *
  84  * PARAMETERS:  WalkState       - Current state of the parse tree walk
  85  *              ResultObj       - if non-zero, pop result from result stack
  86  *
  87  * RETURN:      Status
  88  *
  89  * DESCRIPTION: Get the result of a predicate evaluation
  90  *
  91  ****************************************************************************/
  92
  93 ACPI_STATUS
  94 AcpiDsGetPredicateValue (
  95     ACPI_WALK_STATE         *WalkState,
  96     ACPI_OPERAND_OBJECT     *ResultObj)
  97 {
  98     ACPI_STATUS             Status = AE_OK;
  99     ACPI_OPERAND_OBJECT     *ObjDesc;
 100     ACPI_OPERAND_OBJECT     *LocalObjDesc = NULL;
 101
 102
 103     ACPI_FUNCTION_TRACE_PTR (DsGetPredicateValue, WalkState);
 104
 105
 106     WalkState->ControlState->Common.State = 0;
 107
 108     if (ResultObj)
 109     {
 110         Status = AcpiDsResultPop (&ObjDesc, WalkState);
 111         if (ACPI_FAILURE (Status))
 112         {
 113             ACPI_EXCEPTION ((AE_INFO, Status,
 114                 "Could not get result from predicate evaluation"));
 115
 116             return_ACPI_STATUS (Status);
 117         }
 118     }
 119     else
 120     {
 121         Status = AcpiDsCreateOperand (WalkState, WalkState->Op, 0);
 122         if (ACPI_FAILURE (Status))
 123         {
 124             return_ACPI_STATUS (Status);
 125         }
 126
 127         Status = AcpiExResolveToValue (&WalkState->Operands [0], WalkState);
 128         if (ACPI_FAILURE (Status))
 129         {
 130             return_ACPI_STATUS (Status);
 131         }
 132
 133         ObjDesc = WalkState->Operands [0];
 134     }
 135
 136     if (!ObjDesc)
 137     {
 138         ACPI_ERROR ((AE_INFO,
 139             "No predicate ObjDesc=%p State=%p",
 140             ObjDesc, WalkState));
 141
 142         return_ACPI_STATUS (AE_AML_NO_OPERAND);
 143     }
 144
 145     /*
 146      * Result of predicate evaluation must be an Integer
 147      * object. Implicitly convert the argument if necessary.
 148      */
 149     Status = AcpiExConvertToInteger (ObjDesc, &LocalObjDesc, 16);
 150     if (ACPI_FAILURE (Status))
 151     {
 152         goto Cleanup;
 153     }
 154
 155     if (LocalObjDesc->Common.Type != ACPI_TYPE_INTEGER)
 156     {
 157         ACPI_ERROR ((AE_INFO,
 158             "Bad predicate (not an integer) ObjDesc=%p State=%p Type=0x%X",
 159             ObjDesc, WalkState, ObjDesc->Common.Type));
 160
 161         Status = AE_AML_OPERAND_TYPE;
 162         goto Cleanup;
 163     }
 164
 165     /* Truncate the predicate to 32-bits if necessary */
 166
 167     (void) AcpiExTruncateFor32bitTable (LocalObjDesc);
 168
 169     /*
 170      * Save the result of the predicate evaluation on
 171      * the control stack
 172      */
 173     if (LocalObjDesc->Integer.Value)
 174     {
 175         WalkState->ControlState->Common.Value = TRUE;
 176     }
 177     else
 178     {
 179         /*
 180          * Predicate is FALSE, we will just toss the
 181          * rest of the package
 182          */
 183         WalkState->ControlState->Common.Value = FALSE;
 184         Status = AE_CTRL_FALSE;
 185     }
 186
 187     /* Predicate can be used for an implicit return value */
 188
 189     (void) AcpiDsDoImplicitReturn (LocalObjDesc, WalkState, TRUE);
 190
 191
 192 Cleanup:
 193
 194     ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Completed a predicate eval=%X Op=%p\n",
 195         WalkState->ControlState->Common.Value, WalkState->Op));
 196
 197      /* Break to debugger to display result */
 198
 199     ACPI_DEBUGGER_EXEC (AcpiDbDisplayResultObject (LocalObjDesc, WalkState));
 200
 201     /*
 202      * Delete the predicate result object (we know that
 203      * we don't need it anymore)
 204      */
 205     if (LocalObjDesc != ObjDesc)
 206     {
 207         AcpiUtRemoveReference (LocalObjDesc);
 208     }
 209     AcpiUtRemoveReference (ObjDesc);
 210
 211     WalkState->ControlState->Common.State = ACPI_CONTROL_NORMAL;
 212     return_ACPI_STATUS (Status);
 213 }
 214
 215
 216 /*****************************************************************************
 217  *
 218  * FUNCTION:    AcpiDsExecBeginOp
 219  *
 220  * PARAMETERS:  WalkState       - Current state of the parse tree walk
 221  *              OutOp           - Where to return op if a new one is created
 222  *
 223  * RETURN:      Status
 224  *
 225  * DESCRIPTION: Descending callback used during the execution of control
 226  *              methods. This is where most operators and operands are
 227  *              dispatched to the interpreter.
 228  *
 229  ****************************************************************************/
 230
 231 ACPI_STATUS
 232 AcpiDsExecBeginOp (
 233     ACPI_WALK_STATE         *WalkState,
 234     ACPI_PARSE_OBJECT       **OutOp)
 235 {
 236     ACPI_PARSE_OBJECT       *Op;
 237     ACPI_STATUS             Status = AE_OK;
 238     UINT32                  OpcodeClass;
 239
 240
 241     ACPI_FUNCTION_TRACE_PTR (DsExecBeginOp, WalkState);
 242
 243
 244     Op = WalkState->Op;
 245     if (!Op)
 246     {
 247         Status = AcpiDsLoad2BeginOp (WalkState, OutOp);
 248         if (ACPI_FAILURE (Status))
 249         {
 250             goto ErrorExit;
 251         }
 252
 253         Op = *OutOp;
 254         WalkState->Op = Op;
 255         WalkState->Opcode = Op->Common.AmlOpcode;
 256         WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
 257
 258         if (AcpiNsOpensScope (WalkState->OpInfo->ObjectType))
 259         {
 260             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 261                 "(%s) Popping scope for Op %p\n",
 262                 AcpiUtGetTypeName (WalkState->OpInfo->ObjectType), Op));
 263
 264             Status = AcpiDsScopeStackPop (WalkState);
 265             if (ACPI_FAILURE (Status))
 266             {
 267                 goto ErrorExit;
 268             }
 269         }
 270     }
 271
 272     if (Op == WalkState->Origin)
 273     {
 274         if (OutOp)
 275         {
 276             *OutOp = Op;
 277         }
 278
 279         return_ACPI_STATUS (AE_OK);
 280     }
 281
 282     /*
 283      * If the previous opcode was a conditional, this opcode
 284      * must be the beginning of the associated predicate.
 285      * Save this knowledge in the current scope descriptor
 286      */
 287     if ((WalkState->ControlState) &&
 288         (WalkState->ControlState->Common.State ==
 289             ACPI_CONTROL_CONDITIONAL_EXECUTING))
 290     {
 291         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Exec predicate Op=%p State=%p\n",
 292                         Op, WalkState));
 293
 294         WalkState->ControlState->Common.State = ACPI_CONTROL_PREDICATE_EXECUTING;
 295
 296         /* Save start of predicate */
 297
 298         WalkState->ControlState->Control.PredicateOp = Op;
 299     }
 300
 301
 302     OpcodeClass = WalkState->OpInfo->Class;
 303
 304     /* We want to send namepaths to the load code */
 305
 306     if (Op->Common.AmlOpcode == AML_INT_NAMEPATH_OP)
 307     {
 308         OpcodeClass = AML_CLASS_NAMED_OBJECT;
 309     }
 310
 311     /*
 312      * Handle the opcode based upon the opcode type
 313      */
 314     switch (OpcodeClass)
 315     {
 316     case AML_CLASS_CONTROL:
 317
 318         Status = AcpiDsExecBeginControlOp (WalkState, Op);
 319         break;
 320
 321     case AML_CLASS_NAMED_OBJECT:
 322
 323         if (WalkState->WalkType & ACPI_WALK_METHOD)
 324         {
 325             /*
 326              * Found a named object declaration during method execution;
 327              * we must enter this object into the namespace. The created
 328              * object is temporary and will be deleted upon completion of
 329              * the execution of this method.
 330              *
 331              * Note 10/2010: Except for the Scope() op. This opcode does
 332              * not actually create a new object, it refers to an existing
 333              * object. However, for Scope(), we want to indeed open a
 334              * new scope.
 335              */
 336             if (Op->Common.AmlOpcode != AML_SCOPE_OP)
 337             {
 338                 Status = AcpiDsLoad2BeginOp (WalkState, NULL);
 339             }
 340             else
 341             {
 342                 Status = AcpiDsScopeStackPush (Op->Named.Node,
 343                             Op->Named.Node->Type, WalkState);
 344                 if (ACPI_FAILURE (Status))
 345                 {
 346                     return_ACPI_STATUS (Status);
 347                 }
 348             }
 349         }
 350         break;
 351
 352     case AML_CLASS_EXECUTE:
 353     case AML_CLASS_CREATE:
 354
 355         break;
 356
 357     default:
 358
 359         break;
 360     }
 361
 362     /* Nothing to do here during method execution */
 363
 364     return_ACPI_STATUS (Status);
 365
 366
 367 ErrorExit:
 368     Status = AcpiDsMethodError (Status, WalkState);
 369     return_ACPI_STATUS (Status);
 370 }
 371
 372
 373 /*****************************************************************************
 374  *
 375  * FUNCTION:    AcpiDsExecEndOp
 376  *
 377  * PARAMETERS:  WalkState       - Current state of the parse tree walk
 378  *
 379  * RETURN:      Status
 380  *
 381  * DESCRIPTION: Ascending callback used during the execution of control
 382  *              methods. The only thing we really need to do here is to
 383  *              notice the beginning of IF, ELSE, and WHILE blocks.
 384  *
 385  ****************************************************************************/
 386
 387 ACPI_STATUS
 388 AcpiDsExecEndOp (
 389     ACPI_WALK_STATE         *WalkState)
 390 {
 391     ACPI_PARSE_OBJECT       *Op;
 392     ACPI_STATUS             Status = AE_OK;
 393     UINT32                  OpType;
 394     UINT32                  OpClass;
 395     ACPI_PARSE_OBJECT       *NextOp;
 396     ACPI_PARSE_OBJECT       *FirstArg;
 397
 398
 399     ACPI_FUNCTION_TRACE_PTR (DsExecEndOp, WalkState);
 400
 401
 402     Op      = WalkState->Op;
 403     OpType  = WalkState->OpInfo->Type;
 404     OpClass = WalkState->OpInfo->Class;
 405
 406     if (OpClass == AML_CLASS_UNKNOWN)
 407     {
 408         ACPI_ERROR ((AE_INFO, "Unknown opcode 0x%X", Op->Common.AmlOpcode));
 409         return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
 410     }
 411
 412     FirstArg = Op->Common.Value.Arg;
 413
 414     /* Init the walk state */
 415
 416     WalkState->NumOperands = 0;
 417     WalkState->OperandIndex = 0;
 418     WalkState->ReturnDesc = NULL;
 419     WalkState->ResultObj = NULL;
 420
 421     /* Call debugger for single step support (DEBUG build only) */
 422
 423     ACPI_DEBUGGER_EXEC (Status = AcpiDbSingleStep (WalkState, Op, OpClass));
 424     ACPI_DEBUGGER_EXEC (if (ACPI_FAILURE (Status)) {return_ACPI_STATUS (Status);});
 425
 426     /* Decode the Opcode Class */
 427
 428     switch (OpClass)
 429     {
 430     case AML_CLASS_ARGUMENT:    /* Constants, literals, etc. */
 431
 432         if (WalkState->Opcode == AML_INT_NAMEPATH_OP)
 433         {
 434             Status = AcpiDsEvaluateNamePath (WalkState);
 435             if (ACPI_FAILURE (Status))
 436             {
 437                 goto Cleanup;
 438             }
 439         }
 440         break;
 441
 442     case AML_CLASS_EXECUTE:     /* Most operators with arguments */
 443
 444         /* Build resolved operand stack */
 445
 446         Status = AcpiDsCreateOperands (WalkState, FirstArg);
 447         if (ACPI_FAILURE (Status))
 448         {
 449             goto Cleanup;
 450         }
 451
 452         /*
 453          * All opcodes require operand resolution, with the only exceptions
 454          * being the ObjectType and SizeOf operators.
 455          */
 456         if (!(WalkState->OpInfo->Flags & AML_NO_OPERAND_RESOLVE))
 457         {
 458             /* Resolve all operands */
 459
 460             Status = AcpiExResolveOperands (WalkState->Opcode,
 461                         &(WalkState->Operands [WalkState->NumOperands -1]),
 462                         WalkState);
 463         }
 464
 465         if (ACPI_SUCCESS (Status))
 466         {
 467             /*
 468              * Dispatch the request to the appropriate interpreter handler
 469              * routine. There is one routine per opcode "type" based upon the
 470              * number of opcode arguments and return type.
 471              */
 472             Status = AcpiGbl_OpTypeDispatch[OpType] (WalkState);
 473         }
 474         else
 475         {
 476             /*
 477              * Treat constructs of the form "Store(LocalX,LocalX)" as noops when the
 478              * Local is uninitialized.
 479              */
 480             if  ((Status == AE_AML_UNINITIALIZED_LOCAL) &&
 481                 (WalkState->Opcode == AML_STORE_OP) &&
 482                 (WalkState->Operands[0]->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&
 483                 (WalkState->Operands[1]->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&
 484                 (WalkState->Operands[0]->Reference.Class ==
 485                  WalkState->Operands[1]->Reference.Class) &&
 486                 (WalkState->Operands[0]->Reference.Value ==
 487                  WalkState->Operands[1]->Reference.Value))
 488             {
 489                 Status = AE_OK;
 490             }
 491             else
 492             {
 493                 ACPI_EXCEPTION ((AE_INFO, Status,
 494                     "While resolving operands for [%s]",
 495                     AcpiPsGetOpcodeName (WalkState->Opcode)));
 496             }
 497         }
 498
 499         /* Always delete the argument objects and clear the operand stack */
 500
 501         AcpiDsClearOperands (WalkState);
 502
 503         /*
 504          * If a result object was returned from above, push it on the
 505          * current result stack
 506          */
 507         if (ACPI_SUCCESS (Status) &&
 508             WalkState->ResultObj)
 509         {
 510             Status = AcpiDsResultPush (WalkState->ResultObj, WalkState);
 511         }
 512         break;
 513
 514     default:
 515
 516         switch (OpType)
 517         {
 518         case AML_TYPE_CONTROL:    /* Type 1 opcode, IF/ELSE/WHILE/NOOP */
 519
 520             /* 1 Operand, 0 ExternalResult, 0 InternalResult */
 521
 522             Status = AcpiDsExecEndControlOp (WalkState, Op);
 523
 524             break;
 525
 526         case AML_TYPE_METHOD_CALL:
 527             /*
 528              * If the method is referenced from within a package
 529              * declaration, it is not a invocation of the method, just
 530              * a reference to it.
 531              */
 532             if ((Op->Asl.Parent) &&
 533                ((Op->Asl.Parent->Asl.AmlOpcode == AML_PACKAGE_OP) ||
 534                 (Op->Asl.Parent->Asl.AmlOpcode == AML_VAR_PACKAGE_OP)))
 535             {
 536                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 537                     "Method Reference in a Package, Op=%p\n", Op));
 538
 539                 Op->Common.Node = (ACPI_NAMESPACE_NODE *) Op->Asl.Value.Arg->Asl.Node;
 540                 AcpiUtAddReference (Op->Asl.Value.Arg->Asl.Node->Object);
 541                 return_ACPI_STATUS (AE_OK);
 542             }
 543
 544             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Method invocation, Op=%p\n", Op));
 545
 546             /*
 547              * (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains
 548              * the method Node pointer
 549              */
 550             /* NextOp points to the op that holds the method name */
 551
 552             NextOp = FirstArg;
 553
 554             /* NextOp points to first argument op */
 555
 556             NextOp = NextOp->Common.Next;
 557
 558             /*
 559              * Get the method's arguments and put them on the operand stack
 560              */
 561             Status = AcpiDsCreateOperands (WalkState, NextOp);
 562             if (ACPI_FAILURE (Status))
 563             {
 564                 break;
 565             }
 566
 567             /*
 568              * Since the operands will be passed to another control method,
 569              * we must resolve all local references here (Local variables,
 570              * arguments to *this* method, etc.)
 571              */
 572             Status = AcpiDsResolveOperands (WalkState);
 573             if (ACPI_FAILURE (Status))
 574             {
 575                 /* On error, clear all resolved operands */
 576
 577                 AcpiDsClearOperands (WalkState);
 578                 break;
 579             }
 580
 581             /*
 582              * Tell the walk loop to preempt this running method and
 583              * execute the new method
 584              */
 585             Status = AE_CTRL_TRANSFER;
 586
 587             /*
 588              * Return now; we don't want to disturb anything,
 589              * especially the operand count!
 590              */
 591             return_ACPI_STATUS (Status);
 592
 593         case AML_TYPE_CREATE_FIELD:
 594
 595             ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 596                 "Executing CreateField Buffer/Index Op=%p\n", Op));
 597
 598             Status = AcpiDsLoad2EndOp (WalkState);
 599             if (ACPI_FAILURE (Status))
 600             {
 601                 break;
 602             }
 603
 604             Status = AcpiDsEvalBufferFieldOperands (WalkState, Op);
 605             break;
 606
 607
 608         case AML_TYPE_CREATE_OBJECT:
 609
 610             ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 611                 "Executing CreateObject (Buffer/Package) Op=%p\n", Op));
 612
 613             switch (Op->Common.Parent->Common.AmlOpcode)
 614             {
 615             case AML_NAME_OP:
 616                 /*
 617                  * Put the Node on the object stack (Contains the ACPI Name
 618                  * of this object)
 619                  */
 620                 WalkState->Operands[0] = (void *) Op->Common.Parent->Common.Node;
 621                 WalkState->NumOperands = 1;
 622
 623                 Status = AcpiDsCreateNode (WalkState,
 624                             Op->Common.Parent->Common.Node,
 625                             Op->Common.Parent);
 626                 if (ACPI_FAILURE (Status))
 627                 {
 628                     break;
 629                 }
 630
 631                 /* Fall through */
 632                 /*lint -fallthrough */
 633
 634             case AML_INT_EVAL_SUBTREE_OP:
 635
 636                 Status = AcpiDsEvalDataObjectOperands (WalkState, Op,
 637                             AcpiNsGetAttachedObject (Op->Common.Parent->Common.Node));
 638                 break;
 639
 640             default:
 641
 642                 Status = AcpiDsEvalDataObjectOperands (WalkState, Op, NULL);
 643                 break;
 644             }
 645
 646             /*
 647              * If a result object was returned from above, push it on the
 648              * current result stack
 649              */
 650             if (WalkState->ResultObj)
 651             {
 652                 Status = AcpiDsResultPush (WalkState->ResultObj, WalkState);
 653             }
 654             break;
 655
 656         case AML_TYPE_NAMED_FIELD:
 657         case AML_TYPE_NAMED_COMPLEX:
 658         case AML_TYPE_NAMED_SIMPLE:
 659         case AML_TYPE_NAMED_NO_OBJ:
 660
 661             Status = AcpiDsLoad2EndOp (WalkState);
 662             if (ACPI_FAILURE (Status))
 663             {
 664                 break;
 665             }
 666
 667             if (Op->Common.AmlOpcode == AML_REGION_OP)
 668             {
 669                 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 670                     "Executing OpRegion Address/Length Op=%p\n", Op));
 671
 672                 Status = AcpiDsEvalRegionOperands (WalkState, Op);
 673                 if (ACPI_FAILURE (Status))
 674                 {
 675                     break;
 676                 }
 677             }
 678             else if (Op->Common.AmlOpcode == AML_DATA_REGION_OP)
 679             {
 680                 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 681                     "Executing DataTableRegion Strings Op=%p\n", Op));
 682
 683                 Status = AcpiDsEvalTableRegionOperands (WalkState, Op);
 684                 if (ACPI_FAILURE (Status))
 685                 {
 686                     break;
 687                 }
 688             }
 689             else if (Op->Common.AmlOpcode == AML_BANK_FIELD_OP)
 690             {
 691                 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 692                     "Executing BankField Op=%p\n", Op));
 693
 694                 Status = AcpiDsEvalBankFieldOperands (WalkState, Op);
 695                 if (ACPI_FAILURE (Status))
 696                 {
 697                     break;
 698                 }
 699             }
 700             break;
 701
 702         case AML_TYPE_UNDEFINED:
 703
 704             ACPI_ERROR ((AE_INFO,
 705                 "Undefined opcode type Op=%p", Op));
 706             return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
 707
 708         case AML_TYPE_BOGUS:
 709
 710             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 711                 "Internal opcode=%X type Op=%p\n",
 712                 WalkState->Opcode, Op));
 713             break;
 714
 715         default:
 716
 717             ACPI_ERROR ((AE_INFO,
 718                 "Unimplemented opcode, class=0x%X type=0x%X Opcode=0x%X Op=%p",
 719                 OpClass, OpType, Op->Common.AmlOpcode, Op));
 720
 721             Status = AE_NOT_IMPLEMENTED;
 722             break;
 723         }
 724     }
 725
 726     /*
 727      * ACPI 2.0 support for 64-bit integers: Truncate numeric
 728      * result value if we are executing from a 32-bit ACPI table
 729      */
 730     (void) AcpiExTruncateFor32bitTable (WalkState->ResultObj);
 731
 732     /*
 733      * Check if we just completed the evaluation of a
 734      * conditional predicate
 735      */
 736     if ((ACPI_SUCCESS (Status)) &&
 737         (WalkState->ControlState) &&
 738         (WalkState->ControlState->Common.State ==
 739             ACPI_CONTROL_PREDICATE_EXECUTING) &&
 740         (WalkState->ControlState->Control.PredicateOp == Op))
 741     {
 742         Status = AcpiDsGetPredicateValue (WalkState, WalkState->ResultObj);
 743         WalkState->ResultObj = NULL;
 744     }
 745
 746
 747 Cleanup:
 748
 749     if (WalkState->ResultObj)
 750     {
 751         /* Break to debugger to display result */
 752
 753         ACPI_DEBUGGER_EXEC (AcpiDbDisplayResultObject (WalkState->ResultObj,
 754                                 WalkState));
 755
 756         /*
 757          * Delete the result op if and only if:
 758          * Parent will not use the result -- such as any
 759          * non-nested type2 op in a method (parent will be method)
 760          */
 761         AcpiDsDeleteResultIfNotUsed (Op, WalkState->ResultObj, WalkState);
 762     }
 763
 764 #ifdef _UNDER_DEVELOPMENT
 765
 766     if (WalkState->ParserState.Aml == WalkState->ParserState.AmlEnd)
 767     {
 768         AcpiDbMethodEnd (WalkState);
 769     }
 770 #endif
 771
 772     /* Invoke exception handler on error */
 773
 774     if (ACPI_FAILURE (Status))
 775     {
 776         Status = AcpiDsMethodError (Status, WalkState);
 777     }
 778
 779     /* Always clear the object stack */
 780
 781     WalkState->NumOperands = 0;
 782     return_ACPI_STATUS (Status);
 783 }