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  *
  10  * 1. Copyright Notice
  11  *
  12  * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp.
  13  * All rights reserved.
  14  *
  15  * 2. License
  16  *
  17  * 2.1. This is your license from Intel Corp. under its intellectual property
  18  * rights.  You may have additional license terms from the party that provided
  19  * you this software, covering your right to use that party's intellectual
  20  * property rights.
  21  *
  22  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
  23  * copy of the source code appearing in this file ("Covered Code") an
  24  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
  25  * base code distributed originally by Intel ("Original Intel Code") to copy,
  26  * make derivatives, distribute, use and display any portion of the Covered
  27  * Code in any form, with the right to sublicense such rights; and
  28  *
  29  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
  30  * license (with the right to sublicense), under only those claims of Intel
  31  * patents that are infringed by the Original Intel Code, to make, use, sell,
  32  * offer to sell, and import the Covered Code and derivative works thereof
  33  * solely to the minimum extent necessary to exercise the above copyright
  34  * license, and in no event shall the patent license extend to any additions
  35  * to or modifications of the Original Intel Code.  No other license or right
  36  * is granted directly or by implication, estoppel or otherwise;
  37  *
  38  * The above copyright and patent license is granted only if the following
  39  * conditions are met:
  40  *
  41  * 3. Conditions
  42  *
  43  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
  44  * Redistribution of source code of any substantial portion of the Covered
  45  * Code or modification with rights to further distribute source must include
  46  * the above Copyright Notice, the above License, this list of Conditions,
  47  * and the following Disclaimer and Export Compliance provision.  In addition,
  48  * Licensee must cause all Covered Code to which Licensee contributes to
  49  * contain a file documenting the changes Licensee made to create that Covered
  50  * Code and the date of any change.  Licensee must include in that file the
  51  * documentation of any changes made by any predecessor Licensee.  Licensee
  52  * must include a prominent statement that the modification is derived,
  53  * directly or indirectly, from Original Intel Code.
  54  *
  55  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
  56  * Redistribution of source code of any substantial portion of the Covered
  57  * Code or modification without rights to further distribute source must
  58  * include the following Disclaimer and Export Compliance provision in the
  59  * documentation and/or other materials provided with distribution.  In
  60  * addition, Licensee may not authorize further sublicense of source of any
  61  * portion of the Covered Code, and must include terms to the effect that the
  62  * license from Licensee to its licensee is limited to the intellectual
  63  * property embodied in the software Licensee provides to its licensee, and
  64  * not to intellectual property embodied in modifications its licensee may
  65  * make.
  66  *
  67  * 3.3. Redistribution of Executable. Redistribution in executable form of any
  68  * substantial portion of the Covered Code or modification must reproduce the
  69  * above Copyright Notice, and the following Disclaimer and Export Compliance
  70  * provision in the documentation and/or other materials provided with the
  71  * distribution.
  72  *
  73  * 3.4. Intel retains all right, title, and interest in and to the Original
  74  * Intel Code.
  75  *
  76  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
  77  * Intel shall be used in advertising or otherwise to promote the sale, use or
  78  * other dealings in products derived from or relating to the Covered Code
  79  * without prior written authorization from Intel.
  80  *
  81  * 4. Disclaimer and Export Compliance
  82  *
  83  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
  84  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
  85  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
  86  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
  87  * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
  88  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
  89  * PARTICULAR PURPOSE.
  90  *
  91  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
  92  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
  93  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
  94  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
  95  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
  96  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
  97  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
  98  * LIMITED REMEDY.
  99  *
 100  * 4.3. Licensee shall not export, either directly or indirectly, any of this
 101  * software or system incorporating such software without first obtaining any
 102  * required license or other approval from the U. S. Department of Commerce or
 103  * any other agency or department of the United States Government.  In the
 104  * event Licensee exports any such software from the United States or
 105  * re-exports any such software from a foreign destination, Licensee shall
 106  * ensure that the distribution and export/re-export of the software is in
 107  * compliance with all laws, regulations, orders, or other restrictions of the
 108  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
 109  * any of its subsidiaries will export/re-export any technical data, process,
 110  * software, or service, directly or indirectly, to any country for which the
 111  * United States government or any agency thereof requires an export license,
 112  * other governmental approval, or letter of assurance, without first obtaining
 113  * such license, approval or letter.
 114  *
 115  *****************************************************************************/
 116
 117 #define __DSWEXEC_C__
 118
 119 #include "acpi.h"
 120 #include "accommon.h"
 121 #include "acparser.h"
 122 #include "amlcode.h"
 123 #include "acdispat.h"
 124 #include "acinterp.h"
 125 #include "acnamesp.h"
 126 #include "acdebug.h"
 127
 128
 129 #define _COMPONENT          ACPI_DISPATCHER
 130         ACPI_MODULE_NAME    ("dswexec")
 131
 132 /*
 133  * Dispatch table for opcode classes
 134  */
 135 static ACPI_EXECUTE_OP      AcpiGbl_OpTypeDispatch [] =
 136 {
 137     AcpiExOpcode_0A_0T_1R,
 138     AcpiExOpcode_1A_0T_0R,
 139     AcpiExOpcode_1A_0T_1R,
 140     AcpiExOpcode_1A_1T_0R,
 141     AcpiExOpcode_1A_1T_1R,
 142     AcpiExOpcode_2A_0T_0R,
 143     AcpiExOpcode_2A_0T_1R,
 144     AcpiExOpcode_2A_1T_1R,
 145     AcpiExOpcode_2A_2T_1R,
 146     AcpiExOpcode_3A_0T_0R,
 147     AcpiExOpcode_3A_1T_1R,
 148     AcpiExOpcode_6A_0T_1R
 149 };
 150
 151
 152 /*****************************************************************************
 153  *
 154  * FUNCTION:    AcpiDsGetPredicateValue
 155  *
 156  * PARAMETERS:  WalkState       - Current state of the parse tree walk
 157  *              ResultObj       - if non-zero, pop result from result stack
 158  *
 159  * RETURN:      Status
 160  *
 161  * DESCRIPTION: Get the result of a predicate evaluation
 162  *
 163  ****************************************************************************/
 164
 165 ACPI_STATUS
 166 AcpiDsGetPredicateValue (
 167     ACPI_WALK_STATE         *WalkState,
 168     ACPI_OPERAND_OBJECT     *ResultObj)
 169 {
 170     ACPI_STATUS             Status = AE_OK;
 171     ACPI_OPERAND_OBJECT     *ObjDesc;
 172     ACPI_OPERAND_OBJECT     *LocalObjDesc = NULL;
 173
 174
 175     ACPI_FUNCTION_TRACE_PTR (DsGetPredicateValue, WalkState);
 176
 177
 178     WalkState->ControlState->Common.State = 0;
 179
 180     if (ResultObj)
 181     {
 182         Status = AcpiDsResultPop (&ObjDesc, WalkState);
 183         if (ACPI_FAILURE (Status))
 184         {
 185             ACPI_EXCEPTION ((AE_INFO, Status,
 186                 "Could not get result from predicate evaluation"));
 187
 188             return_ACPI_STATUS (Status);
 189         }
 190     }
 191     else
 192     {
 193         Status = AcpiDsCreateOperand (WalkState, WalkState->Op, 0);
 194         if (ACPI_FAILURE (Status))
 195         {
 196             return_ACPI_STATUS (Status);
 197         }
 198
 199         Status = AcpiExResolveToValue (&WalkState->Operands [0], WalkState);
 200         if (ACPI_FAILURE (Status))
 201         {
 202             return_ACPI_STATUS (Status);
 203         }
 204
 205         ObjDesc = WalkState->Operands [0];
 206     }
 207
 208     if (!ObjDesc)
 209     {
 210         ACPI_ERROR ((AE_INFO,
 211             "No predicate ObjDesc=%p State=%p",
 212             ObjDesc, WalkState));
 213
 214         return_ACPI_STATUS (AE_AML_NO_OPERAND);
 215     }
 216
 217     /*
 218      * Result of predicate evaluation must be an Integer
 219      * object. Implicitly convert the argument if necessary.
 220      */
 221     Status = AcpiExConvertToInteger (ObjDesc, &LocalObjDesc, 16);
 222     if (ACPI_FAILURE (Status))
 223     {
 224         goto Cleanup;
 225     }
 226
 227     if (LocalObjDesc->Common.Type != ACPI_TYPE_INTEGER)
 228     {
 229         ACPI_ERROR ((AE_INFO,
 230             "Bad predicate (not an integer) ObjDesc=%p State=%p Type=%X",
 231             ObjDesc, WalkState, ObjDesc->Common.Type));
 232
 233         Status = AE_AML_OPERAND_TYPE;
 234         goto Cleanup;
 235     }
 236
 237     /* Truncate the predicate to 32-bits if necessary */
 238
 239     AcpiExTruncateFor32bitTable (LocalObjDesc);
 240
 241     /*
 242      * Save the result of the predicate evaluation on
 243      * the control stack
 244      */
 245     if (LocalObjDesc->Integer.Value)
 246     {
 247         WalkState->ControlState->Common.Value = TRUE;
 248     }
 249     else
 250     {
 251         /*
 252          * Predicate is FALSE, we will just toss the
 253          * rest of the package
 254          */
 255         WalkState->ControlState->Common.Value = FALSE;
 256         Status = AE_CTRL_FALSE;
 257     }
 258
 259     /* Predicate can be used for an implicit return value */
 260
 261     (void) AcpiDsDoImplicitReturn (LocalObjDesc, WalkState, TRUE);
 262
 263
 264 Cleanup:
 265
 266     ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Completed a predicate eval=%X Op=%p\n",
 267         WalkState->ControlState->Common.Value, WalkState->Op));
 268
 269      /* Break to debugger to display result */
 270
 271     ACPI_DEBUGGER_EXEC (AcpiDbDisplayResultObject (LocalObjDesc, WalkState));
 272
 273     /*
 274      * Delete the predicate result object (we know that
 275      * we don't need it anymore)
 276      */
 277     if (LocalObjDesc != ObjDesc)
 278     {
 279         AcpiUtRemoveReference (LocalObjDesc);
 280     }
 281     AcpiUtRemoveReference (ObjDesc);
 282
 283     WalkState->ControlState->Common.State = ACPI_CONTROL_NORMAL;
 284     return_ACPI_STATUS (Status);
 285 }
 286
 287
 288 /*****************************************************************************
 289  *
 290  * FUNCTION:    AcpiDsExecBeginOp
 291  *
 292  * PARAMETERS:  WalkState       - Current state of the parse tree walk
 293  *              OutOp           - Where to return op if a new one is created
 294  *
 295  * RETURN:      Status
 296  *
 297  * DESCRIPTION: Descending callback used during the execution of control
 298  *              methods.  This is where most operators and operands are
 299  *              dispatched to the interpreter.
 300  *
 301  ****************************************************************************/
 302
 303 ACPI_STATUS
 304 AcpiDsExecBeginOp (
 305     ACPI_WALK_STATE         *WalkState,
 306     ACPI_PARSE_OBJECT       **OutOp)
 307 {
 308     ACPI_PARSE_OBJECT       *Op;
 309     ACPI_STATUS             Status = AE_OK;
 310     UINT32                  OpcodeClass;
 311
 312
 313     ACPI_FUNCTION_TRACE_PTR (DsExecBeginOp, WalkState);
 314
 315
 316     Op = WalkState->Op;
 317     if (!Op)
 318     {
 319         Status = AcpiDsLoad2BeginOp (WalkState, OutOp);
 320         if (ACPI_FAILURE (Status))
 321         {
 322             goto ErrorExit;
 323         }
 324
 325         Op = *OutOp;
 326         WalkState->Op = Op;
 327         WalkState->Opcode = Op->Common.AmlOpcode;
 328         WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
 329
 330         if (AcpiNsOpensScope (WalkState->OpInfo->ObjectType))
 331         {
 332             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 333                 "(%s) Popping scope for Op %p\n",
 334                 AcpiUtGetTypeName (WalkState->OpInfo->ObjectType), Op));
 335
 336             Status = AcpiDsScopeStackPop (WalkState);
 337             if (ACPI_FAILURE (Status))
 338             {
 339                 goto ErrorExit;
 340             }
 341         }
 342     }
 343
 344     if (Op == WalkState->Origin)
 345     {
 346         if (OutOp)
 347         {
 348             *OutOp = Op;
 349         }
 350
 351         return_ACPI_STATUS (AE_OK);
 352     }
 353
 354     /*
 355      * If the previous opcode was a conditional, this opcode
 356      * must be the beginning of the associated predicate.
 357      * Save this knowledge in the current scope descriptor
 358      */
 359     if ((WalkState->ControlState) &&
 360         (WalkState->ControlState->Common.State ==
 361             ACPI_CONTROL_CONDITIONAL_EXECUTING))
 362     {
 363         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Exec predicate Op=%p State=%p\n",
 364                         Op, WalkState));
 365
 366         WalkState->ControlState->Common.State = ACPI_CONTROL_PREDICATE_EXECUTING;
 367
 368         /* Save start of predicate */
 369
 370         WalkState->ControlState->Control.PredicateOp = Op;
 371     }
 372
 373
 374     OpcodeClass = WalkState->OpInfo->Class;
 375
 376     /* We want to send namepaths to the load code */
 377
 378     if (Op->Common.AmlOpcode == AML_INT_NAMEPATH_OP)
 379     {
 380         OpcodeClass = AML_CLASS_NAMED_OBJECT;
 381     }
 382
 383     /*
 384      * Handle the opcode based upon the opcode type
 385      */
 386     switch (OpcodeClass)
 387     {
 388     case AML_CLASS_CONTROL:
 389
 390         Status = AcpiDsExecBeginControlOp (WalkState, Op);
 391         break;
 392
 393
 394     case AML_CLASS_NAMED_OBJECT:
 395
 396         if (WalkState->WalkType & ACPI_WALK_METHOD)
 397         {
 398             /*
 399              * Found a named object declaration during method execution;
 400              * we must enter this object into the namespace.  The created
 401              * object is temporary and will be deleted upon completion of
 402              * the execution of this method.
 403              */
 404             Status = AcpiDsLoad2BeginOp (WalkState, NULL);
 405         }
 406
 407         break;
 408
 409
 410     case AML_CLASS_EXECUTE:
 411     case AML_CLASS_CREATE:
 412
 413         break;
 414
 415
 416     default:
 417         break;
 418     }
 419
 420     /* Nothing to do here during method execution */
 421
 422     return_ACPI_STATUS (Status);
 423
 424
 425 ErrorExit:
 426     Status = AcpiDsMethodError (Status, WalkState);
 427     return_ACPI_STATUS (Status);
 428 }
 429
 430
 431 /*****************************************************************************
 432  *
 433  * FUNCTION:    AcpiDsExecEndOp
 434  *
 435  * PARAMETERS:  WalkState       - Current state of the parse tree walk
 436  *
 437  * RETURN:      Status
 438  *
 439  * DESCRIPTION: Ascending callback used during the execution of control
 440  *              methods.  The only thing we really need to do here is to
 441  *              notice the beginning of IF, ELSE, and WHILE blocks.
 442  *
 443  ****************************************************************************/
 444
 445 ACPI_STATUS
 446 AcpiDsExecEndOp (
 447     ACPI_WALK_STATE         *WalkState)
 448 {
 449     ACPI_PARSE_OBJECT       *Op;
 450     ACPI_STATUS             Status = AE_OK;
 451     UINT32                  OpType;
 452     UINT32                  OpClass;
 453     ACPI_PARSE_OBJECT       *NextOp;
 454     ACPI_PARSE_OBJECT       *FirstArg;
 455
 456
 457     ACPI_FUNCTION_TRACE_PTR (DsExecEndOp, WalkState);
 458
 459
 460     Op      = WalkState->Op;
 461     OpType  = WalkState->OpInfo->Type;
 462     OpClass = WalkState->OpInfo->Class;
 463
 464     if (OpClass == AML_CLASS_UNKNOWN)
 465     {
 466         ACPI_ERROR ((AE_INFO, "Unknown opcode %X", Op->Common.AmlOpcode));
 467         return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
 468     }
 469
 470     FirstArg = Op->Common.Value.Arg;
 471
 472     /* Init the walk state */
 473
 474     WalkState->NumOperands = 0;
 475     WalkState->OperandIndex = 0;
 476     WalkState->ReturnDesc = NULL;
 477     WalkState->ResultObj = NULL;
 478
 479     /* Call debugger for single step support (DEBUG build only) */
 480
 481     ACPI_DEBUGGER_EXEC (Status = AcpiDbSingleStep (WalkState, Op, OpClass));
 482     ACPI_DEBUGGER_EXEC (if (ACPI_FAILURE (Status)) {return_ACPI_STATUS (Status);});
 483
 484     /* Decode the Opcode Class */
 485
 486     switch (OpClass)
 487     {
 488     case AML_CLASS_ARGUMENT:    /* Constants, literals, etc. */
 489
 490         if (WalkState->Opcode == AML_INT_NAMEPATH_OP)
 491         {
 492             Status = AcpiDsEvaluateNamePath (WalkState);
 493             if (ACPI_FAILURE (Status))
 494             {
 495                 goto Cleanup;
 496             }
 497         }
 498         break;
 499
 500
 501     case AML_CLASS_EXECUTE:     /* Most operators with arguments */
 502
 503         /* Build resolved operand stack */
 504
 505         Status = AcpiDsCreateOperands (WalkState, FirstArg);
 506         if (ACPI_FAILURE (Status))
 507         {
 508             goto Cleanup;
 509         }
 510
 511         /*
 512          * All opcodes require operand resolution, with the only exceptions
 513          * being the ObjectType and SizeOf operators.
 514          */
 515         if (!(WalkState->OpInfo->Flags & AML_NO_OPERAND_RESOLVE))
 516         {
 517             /* Resolve all operands */
 518
 519             Status = AcpiExResolveOperands (WalkState->Opcode,
 520                         &(WalkState->Operands [WalkState->NumOperands -1]),
 521                         WalkState);
 522         }
 523
 524         if (ACPI_SUCCESS (Status))
 525         {
 526             /*
 527              * Dispatch the request to the appropriate interpreter handler
 528              * routine.  There is one routine per opcode "type" based upon the
 529              * number of opcode arguments and return type.
 530              */
 531             Status = AcpiGbl_OpTypeDispatch[OpType] (WalkState);
 532         }
 533         else
 534         {
 535             /*
 536              * Treat constructs of the form "Store(LocalX,LocalX)" as noops when the
 537              * Local is uninitialized.
 538              */
 539             if  ((Status == AE_AML_UNINITIALIZED_LOCAL) &&
 540                 (WalkState->Opcode == AML_STORE_OP) &&
 541                 (WalkState->Operands[0]->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&
 542                 (WalkState->Operands[1]->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&
 543                 (WalkState->Operands[0]->Reference.Class ==
 544                  WalkState->Operands[1]->Reference.Class) &&
 545                 (WalkState->Operands[0]->Reference.Value ==
 546                  WalkState->Operands[1]->Reference.Value))
 547             {
 548                 Status = AE_OK;
 549             }
 550             else
 551             {
 552                 ACPI_EXCEPTION ((AE_INFO, Status,
 553                     "While resolving operands for [%s]",
 554                     AcpiPsGetOpcodeName (WalkState->Opcode)));
 555             }
 556         }
 557
 558         /* Always delete the argument objects and clear the operand stack */
 559
 560         AcpiDsClearOperands (WalkState);
 561
 562         /*
 563          * If a result object was returned from above, push it on the
 564          * current result stack
 565          */
 566         if (ACPI_SUCCESS (Status) &&
 567             WalkState->ResultObj)
 568         {
 569             Status = AcpiDsResultPush (WalkState->ResultObj, WalkState);
 570         }
 571         break;
 572
 573
 574     default:
 575
 576         switch (OpType)
 577         {
 578         case AML_TYPE_CONTROL:    /* Type 1 opcode, IF/ELSE/WHILE/NOOP */
 579
 580             /* 1 Operand, 0 ExternalResult, 0 InternalResult */
 581
 582             Status = AcpiDsExecEndControlOp (WalkState, Op);
 583
 584             break;
 585
 586
 587         case AML_TYPE_METHOD_CALL:
 588
 589             /*
 590              * If the method is referenced from within a package
 591              * declaration, it is not a invocation of the method, just
 592              * a reference to it.
 593              */
 594             if ((Op->Asl.Parent) &&
 595                ((Op->Asl.Parent->Asl.AmlOpcode == AML_PACKAGE_OP) ||
 596                 (Op->Asl.Parent->Asl.AmlOpcode == AML_VAR_PACKAGE_OP)))
 597             {
 598                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 599                     "Method Reference in a Package, Op=%p\n", Op));
 600
 601                 Op->Common.Node = (ACPI_NAMESPACE_NODE *) Op->Asl.Value.Arg->Asl.Node;
 602                 AcpiUtAddReference (Op->Asl.Value.Arg->Asl.Node->Object);
 603                 return_ACPI_STATUS (AE_OK);
 604             }
 605
 606             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Method invocation, Op=%p\n", Op));
 607
 608             /*
 609              * (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains
 610              * the method Node pointer
 611              */
 612             /* NextOp points to the op that holds the method name */
 613
 614             NextOp = FirstArg;
 615
 616             /* NextOp points to first argument op */
 617
 618             NextOp = NextOp->Common.Next;
 619
 620             /*
 621              * Get the method's arguments and put them on the operand stack
 622              */
 623             Status = AcpiDsCreateOperands (WalkState, NextOp);
 624             if (ACPI_FAILURE (Status))
 625             {
 626                 break;
 627             }
 628
 629             /*
 630              * Since the operands will be passed to another control method,
 631              * we must resolve all local references here (Local variables,
 632              * arguments to *this* method, etc.)
 633              */
 634             Status = AcpiDsResolveOperands (WalkState);
 635             if (ACPI_FAILURE (Status))
 636             {
 637                 /* On error, clear all resolved operands */
 638
 639                 AcpiDsClearOperands (WalkState);
 640                 break;
 641             }
 642
 643             /*
 644              * Tell the walk loop to preempt this running method and
 645              * execute the new method
 646              */
 647             Status = AE_CTRL_TRANSFER;
 648
 649             /*
 650              * Return now; we don't want to disturb anything,
 651              * especially the operand count!
 652              */
 653             return_ACPI_STATUS (Status);
 654
 655
 656         case AML_TYPE_CREATE_FIELD:
 657
 658             ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 659                 "Executing CreateField Buffer/Index Op=%p\n", Op));
 660
 661             Status = AcpiDsLoad2EndOp (WalkState);
 662             if (ACPI_FAILURE (Status))
 663             {
 664                 break;
 665             }
 666
 667             Status = AcpiDsEvalBufferFieldOperands (WalkState, Op);
 668             break;
 669
 670
 671         case AML_TYPE_CREATE_OBJECT:
 672
 673             ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 674                 "Executing CreateObject (Buffer/Package) Op=%p\n", Op));
 675
 676             switch (Op->Common.Parent->Common.AmlOpcode)
 677             {
 678             case AML_NAME_OP:
 679
 680                 /*
 681                  * Put the Node on the object stack (Contains the ACPI Name
 682                  * of this object)
 683                  */
 684                 WalkState->Operands[0] = (void *) Op->Common.Parent->Common.Node;
 685                 WalkState->NumOperands = 1;
 686
 687                 Status = AcpiDsCreateNode (WalkState,
 688                             Op->Common.Parent->Common.Node,
 689                             Op->Common.Parent);
 690                 if (ACPI_FAILURE (Status))
 691                 {
 692                     break;
 693                 }
 694
 695                 /* Fall through */
 696                 /*lint -fallthrough */
 697
 698             case AML_INT_EVAL_SUBTREE_OP:
 699
 700                 Status = AcpiDsEvalDataObjectOperands (WalkState, Op,
 701                             AcpiNsGetAttachedObject (Op->Common.Parent->Common.Node));
 702                 break;
 703
 704             default:
 705
 706                 Status = AcpiDsEvalDataObjectOperands (WalkState, Op, NULL);
 707                 break;
 708             }
 709
 710             /*
 711              * If a result object was returned from above, push it on the
 712              * current result stack
 713              */
 714             if (WalkState->ResultObj)
 715             {
 716                 Status = AcpiDsResultPush (WalkState->ResultObj, WalkState);
 717             }
 718             break;
 719
 720
 721         case AML_TYPE_NAMED_FIELD:
 722         case AML_TYPE_NAMED_COMPLEX:
 723         case AML_TYPE_NAMED_SIMPLE:
 724         case AML_TYPE_NAMED_NO_OBJ:
 725
 726             Status = AcpiDsLoad2EndOp (WalkState);
 727             if (ACPI_FAILURE (Status))
 728             {
 729                 break;
 730             }
 731
 732             if (Op->Common.AmlOpcode == AML_REGION_OP)
 733             {
 734                 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 735                     "Executing OpRegion Address/Length Op=%p\n", Op));
 736
 737                 Status = AcpiDsEvalRegionOperands (WalkState, Op);
 738                 if (ACPI_FAILURE (Status))
 739                 {
 740                     break;
 741                 }
 742             }
 743             else if (Op->Common.AmlOpcode == AML_DATA_REGION_OP)
 744             {
 745                 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 746                     "Executing DataTableRegion Strings Op=%p\n", Op));
 747
 748                 Status = AcpiDsEvalTableRegionOperands (WalkState, Op);
 749                 if (ACPI_FAILURE (Status))
 750                 {
 751                     break;
 752                 }
 753             }
 754             else if (Op->Common.AmlOpcode == AML_BANK_FIELD_OP)
 755             {
 756                 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 757                     "Executing BankField Op=%p\n", Op));
 758
 759                 Status = AcpiDsEvalBankFieldOperands (WalkState, Op);
 760                 if (ACPI_FAILURE (Status))
 761                 {
 762                     break;
 763                 }
 764             }
 765             break;
 766
 767
 768         case AML_TYPE_UNDEFINED:
 769
 770             ACPI_ERROR ((AE_INFO,
 771                 "Undefined opcode type Op=%p", Op));
 772             return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
 773
 774
 775         case AML_TYPE_BOGUS:
 776
 777             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 778                 "Internal opcode=%X type Op=%p\n",
 779                 WalkState->Opcode, Op));
 780             break;
 781
 782
 783         default:
 784
 785             ACPI_ERROR ((AE_INFO,
 786                 "Unimplemented opcode, class=%X type=%X Opcode=%X Op=%p",
 787                 OpClass, OpType, Op->Common.AmlOpcode, Op));
 788
 789             Status = AE_NOT_IMPLEMENTED;
 790             break;
 791         }
 792     }
 793
 794     /*
 795      * ACPI 2.0 support for 64-bit integers: Truncate numeric
 796      * result value if we are executing from a 32-bit ACPI table
 797      */
 798     AcpiExTruncateFor32bitTable (WalkState->ResultObj);
 799
 800     /*
 801      * Check if we just completed the evaluation of a
 802      * conditional predicate
 803      */
 804     if ((ACPI_SUCCESS (Status)) &&
 805         (WalkState->ControlState) &&
 806         (WalkState->ControlState->Common.State ==
 807             ACPI_CONTROL_PREDICATE_EXECUTING) &&
 808         (WalkState->ControlState->Control.PredicateOp == Op))
 809     {
 810         Status = AcpiDsGetPredicateValue (WalkState, WalkState->ResultObj);
 811         WalkState->ResultObj = NULL;
 812     }
 813
 814
 815 Cleanup:
 816
 817     if (WalkState->ResultObj)
 818     {
 819         /* Break to debugger to display result */
 820
 821         ACPI_DEBUGGER_EXEC (AcpiDbDisplayResultObject (WalkState->ResultObj,
 822                                 WalkState));
 823
 824         /*
 825          * Delete the result op if and only if:
 826          * Parent will not use the result -- such as any
 827          * non-nested type2 op in a method (parent will be method)
 828          */
 829         AcpiDsDeleteResultIfNotUsed (Op, WalkState->ResultObj, WalkState);
 830     }
 831
 832 #ifdef _UNDER_DEVELOPMENT
 833
 834     if (WalkState->ParserState.Aml == WalkState->ParserState.AmlEnd)
 835     {
 836         AcpiDbMethodEnd (WalkState);
 837     }
 838 #endif
 839
 840     /* Invoke exception handler on error */
 841
 842     if (ACPI_FAILURE (Status))
 843     {
 844         Status = AcpiDsMethodError (Status, WalkState);
 845     }
 846
 847     /* Always clear the object stack */
 848
 849     WalkState->NumOperands = 0;
 850     return_ACPI_STATUS (Status);
 851 }
 852
 853