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  *
  10  * 1. Copyright Notice
  11  *
  12  * Some or all of this work - Copyright (c) 1999 - 2014, 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 #include "acpi.h"
 118 #include "accommon.h"
 119 #include "acparser.h"
 120 #include "amlcode.h"
 121 #include "acdispat.h"
 122 #include "acinterp.h"
 123 #include "acnamesp.h"
 124 #include "acdebug.h"
 125
 126
 127 #define _COMPONENT          ACPI_DISPATCHER
 128         ACPI_MODULE_NAME    ("dswexec")
 129
 130 /*
 131  * Dispatch table for opcode classes
 132  */
 133 static ACPI_EXECUTE_OP      AcpiGbl_OpTypeDispatch [] =
 134 {
 135     AcpiExOpcode_0A_0T_1R,
 136     AcpiExOpcode_1A_0T_0R,
 137     AcpiExOpcode_1A_0T_1R,
 138     AcpiExOpcode_1A_1T_0R,
 139     AcpiExOpcode_1A_1T_1R,
 140     AcpiExOpcode_2A_0T_0R,
 141     AcpiExOpcode_2A_0T_1R,
 142     AcpiExOpcode_2A_1T_1R,
 143     AcpiExOpcode_2A_2T_1R,
 144     AcpiExOpcode_3A_0T_0R,
 145     AcpiExOpcode_3A_1T_1R,
 146     AcpiExOpcode_6A_0T_1R
 147 };
 148
 149
 150 /*****************************************************************************
 151  *
 152  * FUNCTION:    AcpiDsGetPredicateValue
 153  *
 154  * PARAMETERS:  WalkState       - Current state of the parse tree walk
 155  *              ResultObj       - if non-zero, pop result from result stack
 156  *
 157  * RETURN:      Status
 158  *
 159  * DESCRIPTION: Get the result of a predicate evaluation
 160  *
 161  ****************************************************************************/
 162
 163 ACPI_STATUS
 164 AcpiDsGetPredicateValue (
 165     ACPI_WALK_STATE         *WalkState,
 166     ACPI_OPERAND_OBJECT     *ResultObj)
 167 {
 168     ACPI_STATUS             Status = AE_OK;
 169     ACPI_OPERAND_OBJECT     *ObjDesc;
 170     ACPI_OPERAND_OBJECT     *LocalObjDesc = NULL;
 171
 172
 173     ACPI_FUNCTION_TRACE_PTR (DsGetPredicateValue, WalkState);
 174
 175
 176     WalkState->ControlState->Common.State = 0;
 177
 178     if (ResultObj)
 179     {
 180         Status = AcpiDsResultPop (&ObjDesc, WalkState);
 181         if (ACPI_FAILURE (Status))
 182         {
 183             ACPI_EXCEPTION ((AE_INFO, Status,
 184                 "Could not get result from predicate evaluation"));
 185
 186             return_ACPI_STATUS (Status);
 187         }
 188     }
 189     else
 190     {
 191         Status = AcpiDsCreateOperand (WalkState, WalkState->Op, 0);
 192         if (ACPI_FAILURE (Status))
 193         {
 194             return_ACPI_STATUS (Status);
 195         }
 196
 197         Status = AcpiExResolveToValue (&WalkState->Operands [0], WalkState);
 198         if (ACPI_FAILURE (Status))
 199         {
 200             return_ACPI_STATUS (Status);
 201         }
 202
 203         ObjDesc = WalkState->Operands [0];
 204     }
 205
 206     if (!ObjDesc)
 207     {
 208         ACPI_ERROR ((AE_INFO,
 209             "No predicate ObjDesc=%p State=%p",
 210             ObjDesc, WalkState));
 211
 212         return_ACPI_STATUS (AE_AML_NO_OPERAND);
 213     }
 214
 215     /*
 216      * Result of predicate evaluation must be an Integer
 217      * object. Implicitly convert the argument if necessary.
 218      */
 219     Status = AcpiExConvertToInteger (ObjDesc, &LocalObjDesc, 16);
 220     if (ACPI_FAILURE (Status))
 221     {
 222         goto Cleanup;
 223     }
 224
 225     if (LocalObjDesc->Common.Type != ACPI_TYPE_INTEGER)
 226     {
 227         ACPI_ERROR ((AE_INFO,
 228             "Bad predicate (not an integer) ObjDesc=%p State=%p Type=0x%X",
 229             ObjDesc, WalkState, ObjDesc->Common.Type));
 230
 231         Status = AE_AML_OPERAND_TYPE;
 232         goto Cleanup;
 233     }
 234
 235     /* Truncate the predicate to 32-bits if necessary */
 236
 237     (void) AcpiExTruncateFor32bitTable (LocalObjDesc);
 238
 239     /*
 240      * Save the result of the predicate evaluation on
 241      * the control stack
 242      */
 243     if (LocalObjDesc->Integer.Value)
 244     {
 245         WalkState->ControlState->Common.Value = TRUE;
 246     }
 247     else
 248     {
 249         /*
 250          * Predicate is FALSE, we will just toss the
 251          * rest of the package
 252          */
 253         WalkState->ControlState->Common.Value = FALSE;
 254         Status = AE_CTRL_FALSE;
 255     }
 256
 257     /* Predicate can be used for an implicit return value */
 258
 259     (void) AcpiDsDoImplicitReturn (LocalObjDesc, WalkState, TRUE);
 260
 261
 262 Cleanup:
 263
 264     ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Completed a predicate eval=%X Op=%p\n",
 265         WalkState->ControlState->Common.Value, WalkState->Op));
 266
 267      /* Break to debugger to display result */
 268
 269     ACPI_DEBUGGER_EXEC (AcpiDbDisplayResultObject (LocalObjDesc, WalkState));
 270
 271     /*
 272      * Delete the predicate result object (we know that
 273      * we don't need it anymore)
 274      */
 275     if (LocalObjDesc != ObjDesc)
 276     {
 277         AcpiUtRemoveReference (LocalObjDesc);
 278     }
 279     AcpiUtRemoveReference (ObjDesc);
 280
 281     WalkState->ControlState->Common.State = ACPI_CONTROL_NORMAL;
 282     return_ACPI_STATUS (Status);
 283 }
 284
 285
 286 /*****************************************************************************
 287  *
 288  * FUNCTION:    AcpiDsExecBeginOp
 289  *
 290  * PARAMETERS:  WalkState       - Current state of the parse tree walk
 291  *              OutOp           - Where to return op if a new one is created
 292  *
 293  * RETURN:      Status
 294  *
 295  * DESCRIPTION: Descending callback used during the execution of control
 296  *              methods. This is where most operators and operands are
 297  *              dispatched to the interpreter.
 298  *
 299  ****************************************************************************/
 300
 301 ACPI_STATUS
 302 AcpiDsExecBeginOp (
 303     ACPI_WALK_STATE         *WalkState,
 304     ACPI_PARSE_OBJECT       **OutOp)
 305 {
 306     ACPI_PARSE_OBJECT       *Op;
 307     ACPI_STATUS             Status = AE_OK;
 308     UINT32                  OpcodeClass;
 309
 310
 311     ACPI_FUNCTION_TRACE_PTR (DsExecBeginOp, WalkState);
 312
 313
 314     Op = WalkState->Op;
 315     if (!Op)
 316     {
 317         Status = AcpiDsLoad2BeginOp (WalkState, OutOp);
 318         if (ACPI_FAILURE (Status))
 319         {
 320             goto ErrorExit;
 321         }
 322
 323         Op = *OutOp;
 324         WalkState->Op = Op;
 325         WalkState->Opcode = Op->Common.AmlOpcode;
 326         WalkState->OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
 327
 328         if (AcpiNsOpensScope (WalkState->OpInfo->ObjectType))
 329         {
 330             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 331                 "(%s) Popping scope for Op %p\n",
 332                 AcpiUtGetTypeName (WalkState->OpInfo->ObjectType), Op));
 333
 334             Status = AcpiDsScopeStackPop (WalkState);
 335             if (ACPI_FAILURE (Status))
 336             {
 337                 goto ErrorExit;
 338             }
 339         }
 340     }
 341
 342     if (Op == WalkState->Origin)
 343     {
 344         if (OutOp)
 345         {
 346             *OutOp = Op;
 347         }
 348
 349         return_ACPI_STATUS (AE_OK);
 350     }
 351
 352     /*
 353      * If the previous opcode was a conditional, this opcode
 354      * must be the beginning of the associated predicate.
 355      * Save this knowledge in the current scope descriptor
 356      */
 357     if ((WalkState->ControlState) &&
 358         (WalkState->ControlState->Common.State ==
 359             ACPI_CONTROL_CONDITIONAL_EXECUTING))
 360     {
 361         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Exec predicate Op=%p State=%p\n",
 362                         Op, WalkState));
 363
 364         WalkState->ControlState->Common.State = ACPI_CONTROL_PREDICATE_EXECUTING;
 365
 366         /* Save start of predicate */
 367
 368         WalkState->ControlState->Control.PredicateOp = Op;
 369     }
 370
 371
 372     OpcodeClass = WalkState->OpInfo->Class;
 373
 374     /* We want to send namepaths to the load code */
 375
 376     if (Op->Common.AmlOpcode == AML_INT_NAMEPATH_OP)
 377     {
 378         OpcodeClass = AML_CLASS_NAMED_OBJECT;
 379     }
 380
 381     /*
 382      * Handle the opcode based upon the opcode type
 383      */
 384     switch (OpcodeClass)
 385     {
 386     case AML_CLASS_CONTROL:
 387
 388         Status = AcpiDsExecBeginControlOp (WalkState, Op);
 389         break;
 390
 391     case AML_CLASS_NAMED_OBJECT:
 392
 393         if (WalkState->WalkType & ACPI_WALK_METHOD)
 394         {
 395             /*
 396              * Found a named object declaration during method execution;
 397              * we must enter this object into the namespace. The created
 398              * object is temporary and will be deleted upon completion of
 399              * the execution of this method.
 400              *
 401              * Note 10/2010: Except for the Scope() op. This opcode does
 402              * not actually create a new object, it refers to an existing
 403              * object. However, for Scope(), we want to indeed open a
 404              * new scope.
 405              */
 406             if (Op->Common.AmlOpcode != AML_SCOPE_OP)
 407             {
 408                 Status = AcpiDsLoad2BeginOp (WalkState, NULL);
 409             }
 410             else
 411             {
 412                 Status = AcpiDsScopeStackPush (Op->Named.Node,
 413                             Op->Named.Node->Type, WalkState);
 414                 if (ACPI_FAILURE (Status))
 415                 {
 416                     return_ACPI_STATUS (Status);
 417                 }
 418             }
 419         }
 420         break;
 421
 422     case AML_CLASS_EXECUTE:
 423     case AML_CLASS_CREATE:
 424
 425         break;
 426
 427     default:
 428
 429         break;
 430     }
 431
 432     /* Nothing to do here during method execution */
 433
 434     return_ACPI_STATUS (Status);
 435
 436
 437 ErrorExit:
 438     Status = AcpiDsMethodError (Status, WalkState);
 439     return_ACPI_STATUS (Status);
 440 }
 441
 442
 443 /*****************************************************************************
 444  *
 445  * FUNCTION:    AcpiDsExecEndOp
 446  *
 447  * PARAMETERS:  WalkState       - Current state of the parse tree walk
 448  *
 449  * RETURN:      Status
 450  *
 451  * DESCRIPTION: Ascending callback used during the execution of control
 452  *              methods. The only thing we really need to do here is to
 453  *              notice the beginning of IF, ELSE, and WHILE blocks.
 454  *
 455  ****************************************************************************/
 456
 457 ACPI_STATUS
 458 AcpiDsExecEndOp (
 459     ACPI_WALK_STATE         *WalkState)
 460 {
 461     ACPI_PARSE_OBJECT       *Op;
 462     ACPI_STATUS             Status = AE_OK;
 463     UINT32                  OpType;
 464     UINT32                  OpClass;
 465     ACPI_PARSE_OBJECT       *NextOp;
 466     ACPI_PARSE_OBJECT       *FirstArg;
 467
 468
 469     ACPI_FUNCTION_TRACE_PTR (DsExecEndOp, WalkState);
 470
 471
 472     Op      = WalkState->Op;
 473     OpType  = WalkState->OpInfo->Type;
 474     OpClass = WalkState->OpInfo->Class;
 475
 476     if (OpClass == AML_CLASS_UNKNOWN)
 477     {
 478         ACPI_ERROR ((AE_INFO, "Unknown opcode 0x%X", Op->Common.AmlOpcode));
 479         return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
 480     }
 481
 482     FirstArg = Op->Common.Value.Arg;
 483
 484     /* Init the walk state */
 485
 486     WalkState->NumOperands = 0;
 487     WalkState->OperandIndex = 0;
 488     WalkState->ReturnDesc = NULL;
 489     WalkState->ResultObj = NULL;
 490
 491     /* Call debugger for single step support (DEBUG build only) */
 492
 493     ACPI_DEBUGGER_EXEC (Status = AcpiDbSingleStep (WalkState, Op, OpClass));
 494     ACPI_DEBUGGER_EXEC (if (ACPI_FAILURE (Status)) {return_ACPI_STATUS (Status);});
 495
 496     /* Decode the Opcode Class */
 497
 498     switch (OpClass)
 499     {
 500     case AML_CLASS_ARGUMENT:    /* Constants, literals, etc. */
 501
 502         if (WalkState->Opcode == AML_INT_NAMEPATH_OP)
 503         {
 504             Status = AcpiDsEvaluateNamePath (WalkState);
 505             if (ACPI_FAILURE (Status))
 506             {
 507                 goto Cleanup;
 508             }
 509         }
 510         break;
 511
 512     case AML_CLASS_EXECUTE:     /* Most operators with arguments */
 513
 514         /* Build resolved operand stack */
 515
 516         Status = AcpiDsCreateOperands (WalkState, FirstArg);
 517         if (ACPI_FAILURE (Status))
 518         {
 519             goto Cleanup;
 520         }
 521
 522         /*
 523          * All opcodes require operand resolution, with the only exceptions
 524          * being the ObjectType and SizeOf operators.
 525          */
 526         if (!(WalkState->OpInfo->Flags & AML_NO_OPERAND_RESOLVE))
 527         {
 528             /* Resolve all operands */
 529
 530             Status = AcpiExResolveOperands (WalkState->Opcode,
 531                         &(WalkState->Operands [WalkState->NumOperands -1]),
 532                         WalkState);
 533         }
 534
 535         if (ACPI_SUCCESS (Status))
 536         {
 537             /*
 538              * Dispatch the request to the appropriate interpreter handler
 539              * routine. There is one routine per opcode "type" based upon the
 540              * number of opcode arguments and return type.
 541              */
 542             Status = AcpiGbl_OpTypeDispatch[OpType] (WalkState);
 543         }
 544         else
 545         {
 546             /*
 547              * Treat constructs of the form "Store(LocalX,LocalX)" as noops when the
 548              * Local is uninitialized.
 549              */
 550             if  ((Status == AE_AML_UNINITIALIZED_LOCAL) &&
 551                 (WalkState->Opcode == AML_STORE_OP) &&
 552                 (WalkState->Operands[0]->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&
 553                 (WalkState->Operands[1]->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&
 554                 (WalkState->Operands[0]->Reference.Class ==
 555                  WalkState->Operands[1]->Reference.Class) &&
 556                 (WalkState->Operands[0]->Reference.Value ==
 557                  WalkState->Operands[1]->Reference.Value))
 558             {
 559                 Status = AE_OK;
 560             }
 561             else
 562             {
 563                 ACPI_EXCEPTION ((AE_INFO, Status,
 564                     "While resolving operands for [%s]",
 565                     AcpiPsGetOpcodeName (WalkState->Opcode)));
 566             }
 567         }
 568
 569         /* Always delete the argument objects and clear the operand stack */
 570
 571         AcpiDsClearOperands (WalkState);
 572
 573         /*
 574          * If a result object was returned from above, push it on the
 575          * current result stack
 576          */
 577         if (ACPI_SUCCESS (Status) &&
 578             WalkState->ResultObj)
 579         {
 580             Status = AcpiDsResultPush (WalkState->ResultObj, WalkState);
 581         }
 582         break;
 583
 584     default:
 585
 586         switch (OpType)
 587         {
 588         case AML_TYPE_CONTROL:    /* Type 1 opcode, IF/ELSE/WHILE/NOOP */
 589
 590             /* 1 Operand, 0 ExternalResult, 0 InternalResult */
 591
 592             Status = AcpiDsExecEndControlOp (WalkState, Op);
 593
 594             break;
 595
 596         case AML_TYPE_METHOD_CALL:
 597             /*
 598              * If the method is referenced from within a package
 599              * declaration, it is not a invocation of the method, just
 600              * a reference to it.
 601              */
 602             if ((Op->Asl.Parent) &&
 603                ((Op->Asl.Parent->Asl.AmlOpcode == AML_PACKAGE_OP) ||
 604                 (Op->Asl.Parent->Asl.AmlOpcode == AML_VAR_PACKAGE_OP)))
 605             {
 606                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 607                     "Method Reference in a Package, Op=%p\n", Op));
 608
 609                 Op->Common.Node = (ACPI_NAMESPACE_NODE *) Op->Asl.Value.Arg->Asl.Node;
 610                 AcpiUtAddReference (Op->Asl.Value.Arg->Asl.Node->Object);
 611                 return_ACPI_STATUS (AE_OK);
 612             }
 613
 614             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 615                 "Method invocation, Op=%p\n", Op));
 616
 617             /*
 618              * (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains
 619              * the method Node pointer
 620              */
 621             /* NextOp points to the op that holds the method name */
 622
 623             NextOp = FirstArg;
 624
 625             /* NextOp points to first argument op */
 626
 627             NextOp = NextOp->Common.Next;
 628
 629             /*
 630              * Get the method's arguments and put them on the operand stack
 631              */
 632             Status = AcpiDsCreateOperands (WalkState, NextOp);
 633             if (ACPI_FAILURE (Status))
 634             {
 635                 break;
 636             }
 637
 638             /*
 639              * Since the operands will be passed to another control method,
 640              * we must resolve all local references here (Local variables,
 641              * arguments to *this* method, etc.)
 642              */
 643             Status = AcpiDsResolveOperands (WalkState);
 644             if (ACPI_FAILURE (Status))
 645             {
 646                 /* On error, clear all resolved operands */
 647
 648                 AcpiDsClearOperands (WalkState);
 649                 break;
 650             }
 651
 652             /*
 653              * Tell the walk loop to preempt this running method and
 654              * execute the new method
 655              */
 656             Status = AE_CTRL_TRANSFER;
 657
 658             /*
 659              * Return now; we don't want to disturb anything,
 660              * especially the operand count!
 661              */
 662             return_ACPI_STATUS (Status);
 663
 664         case AML_TYPE_CREATE_FIELD:
 665
 666             ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 667                 "Executing CreateField Buffer/Index Op=%p\n", Op));
 668
 669             Status = AcpiDsLoad2EndOp (WalkState);
 670             if (ACPI_FAILURE (Status))
 671             {
 672                 break;
 673             }
 674
 675             Status = AcpiDsEvalBufferFieldOperands (WalkState, Op);
 676             break;
 677
 678
 679         case AML_TYPE_CREATE_OBJECT:
 680
 681             ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 682                 "Executing CreateObject (Buffer/Package) Op=%p\n", Op));
 683
 684             switch (Op->Common.Parent->Common.AmlOpcode)
 685             {
 686             case AML_NAME_OP:
 687                 /*
 688                  * Put the Node on the object stack (Contains the ACPI Name
 689                  * of this object)
 690                  */
 691                 WalkState->Operands[0] = (void *) Op->Common.Parent->Common.Node;
 692                 WalkState->NumOperands = 1;
 693
 694                 Status = AcpiDsCreateNode (WalkState,
 695                             Op->Common.Parent->Common.Node,
 696                             Op->Common.Parent);
 697                 if (ACPI_FAILURE (Status))
 698                 {
 699                     break;
 700                 }
 701
 702                 /* Fall through */
 703                 /*lint -fallthrough */
 704
 705             case AML_INT_EVAL_SUBTREE_OP:
 706
 707                 Status = AcpiDsEvalDataObjectOperands (WalkState, Op,
 708                             AcpiNsGetAttachedObject (Op->Common.Parent->Common.Node));
 709                 break;
 710
 711             default:
 712
 713                 Status = AcpiDsEvalDataObjectOperands (WalkState, Op, NULL);
 714                 break;
 715             }
 716
 717             /*
 718              * If a result object was returned from above, push it on the
 719              * current result stack
 720              */
 721             if (WalkState->ResultObj)
 722             {
 723                 Status = AcpiDsResultPush (WalkState->ResultObj, WalkState);
 724             }
 725             break;
 726
 727         case AML_TYPE_NAMED_FIELD:
 728         case AML_TYPE_NAMED_COMPLEX:
 729         case AML_TYPE_NAMED_SIMPLE:
 730         case AML_TYPE_NAMED_NO_OBJ:
 731
 732             Status = AcpiDsLoad2EndOp (WalkState);
 733             if (ACPI_FAILURE (Status))
 734             {
 735                 break;
 736             }
 737
 738             if (Op->Common.AmlOpcode == AML_REGION_OP)
 739             {
 740                 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 741                     "Executing OpRegion Address/Length Op=%p\n", Op));
 742
 743                 Status = AcpiDsEvalRegionOperands (WalkState, Op);
 744                 if (ACPI_FAILURE (Status))
 745                 {
 746                     break;
 747                 }
 748             }
 749             else if (Op->Common.AmlOpcode == AML_DATA_REGION_OP)
 750             {
 751                 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 752                     "Executing DataTableRegion Strings Op=%p\n", Op));
 753
 754                 Status = AcpiDsEvalTableRegionOperands (WalkState, Op);
 755                 if (ACPI_FAILURE (Status))
 756                 {
 757                     break;
 758                 }
 759             }
 760             else if (Op->Common.AmlOpcode == AML_BANK_FIELD_OP)
 761             {
 762                 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 763                     "Executing BankField Op=%p\n", Op));
 764
 765                 Status = AcpiDsEvalBankFieldOperands (WalkState, Op);
 766                 if (ACPI_FAILURE (Status))
 767                 {
 768                     break;
 769                 }
 770             }
 771             break;
 772
 773         case AML_TYPE_UNDEFINED:
 774
 775             ACPI_ERROR ((AE_INFO,
 776                 "Undefined opcode type Op=%p", Op));
 777             return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
 778
 779         case AML_TYPE_BOGUS:
 780
 781             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 782                 "Internal opcode=%X type Op=%p\n",
 783                 WalkState->Opcode, Op));
 784             break;
 785
 786         default:
 787
 788             ACPI_ERROR ((AE_INFO,
 789                 "Unimplemented opcode, class=0x%X type=0x%X Opcode=0x%X Op=%p",
 790                 OpClass, OpType, Op->Common.AmlOpcode, Op));
 791
 792             Status = AE_NOT_IMPLEMENTED;
 793             break;
 794         }
 795     }
 796
 797     /*
 798      * ACPI 2.0 support for 64-bit integers: Truncate numeric
 799      * result value if we are executing from a 32-bit ACPI table
 800      */
 801     (void) AcpiExTruncateFor32bitTable (WalkState->ResultObj);
 802
 803     /*
 804      * Check if we just completed the evaluation of a
 805      * conditional predicate
 806      */
 807     if ((ACPI_SUCCESS (Status)) &&
 808         (WalkState->ControlState) &&
 809         (WalkState->ControlState->Common.State ==
 810             ACPI_CONTROL_PREDICATE_EXECUTING) &&
 811         (WalkState->ControlState->Control.PredicateOp == Op))
 812     {
 813         Status = AcpiDsGetPredicateValue (WalkState, WalkState->ResultObj);
 814         WalkState->ResultObj = NULL;
 815     }
 816
 817
 818 Cleanup:
 819
 820     if (WalkState->ResultObj)
 821     {
 822         /* Break to debugger to display result */
 823
 824         ACPI_DEBUGGER_EXEC (AcpiDbDisplayResultObject (WalkState->ResultObj,
 825                                 WalkState));
 826
 827         /*
 828          * Delete the result op if and only if:
 829          * Parent will not use the result -- such as any
 830          * non-nested type2 op in a method (parent will be method)
 831          */
 832         AcpiDsDeleteResultIfNotUsed (Op, WalkState->ResultObj, WalkState);
 833     }
 834
 835 #ifdef _UNDER_DEVELOPMENT
 836
 837     if (WalkState->ParserState.Aml == WalkState->ParserState.AmlEnd)
 838     {
 839         AcpiDbMethodEnd (WalkState);
 840     }
 841 #endif
 842
 843     /* Invoke exception handler on error */
 844
 845     if (ACPI_FAILURE (Status))
 846     {
 847         Status = AcpiDsMethodError (Status, WalkState);
 848     }
 849
 850     /* Always clear the object stack */
 851
 852     WalkState->NumOperands = 0;
 853     return_ACPI_STATUS (Status);
 854 }