reactos/drivers/bus/acpi/acpica/executer/excreate.c

   1 /******************************************************************************
   2  *
   3  * Module Name: excreate - Named object creation
   4  *
   5  *****************************************************************************/
   6
   7 /******************************************************************************
   8  *
   9  * 1. Copyright Notice
  10  *
  11  * Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
  12  * All rights reserved.
  13  *
  14  * 2. License
  15  *
  16  * 2.1. This is your license from Intel Corp. under its intellectual property
  17  * rights.  You may have additional license terms from the party that provided
  18  * you this software, covering your right to use that party's intellectual
  19  * property rights.
  20  *
  21  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
  22  * copy of the source code appearing in this file ("Covered Code") an
  23  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
  24  * base code distributed originally by Intel ("Original Intel Code") to copy,
  25  * make derivatives, distribute, use and display any portion of the Covered
  26  * Code in any form, with the right to sublicense such rights; and
  27  *
  28  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
  29  * license (with the right to sublicense), under only those claims of Intel
  30  * patents that are infringed by the Original Intel Code, to make, use, sell,
  31  * offer to sell, and import the Covered Code and derivative works thereof
  32  * solely to the minimum extent necessary to exercise the above copyright
  33  * license, and in no event shall the patent license extend to any additions
  34  * to or modifications of the Original Intel Code.  No other license or right
  35  * is granted directly or by implication, estoppel or otherwise;
  36  *
  37  * The above copyright and patent license is granted only if the following
  38  * conditions are met:
  39  *
  40  * 3. Conditions
  41  *
  42  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
  43  * Redistribution of source code of any substantial portion of the Covered
  44  * Code or modification with rights to further distribute source must include
  45  * the above Copyright Notice, the above License, this list of Conditions,
  46  * and the following Disclaimer and Export Compliance provision.  In addition,
  47  * Licensee must cause all Covered Code to which Licensee contributes to
  48  * contain a file documenting the changes Licensee made to create that Covered
  49  * Code and the date of any change.  Licensee must include in that file the
  50  * documentation of any changes made by any predecessor Licensee.  Licensee
  51  * must include a prominent statement that the modification is derived,
  52  * directly or indirectly, from Original Intel Code.
  53  *
  54  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
  55  * Redistribution of source code of any substantial portion of the Covered
  56  * Code or modification without rights to further distribute source must
  57  * include the following Disclaimer and Export Compliance provision in the
  58  * documentation and/or other materials provided with distribution.  In
  59  * addition, Licensee may not authorize further sublicense of source of any
  60  * portion of the Covered Code, and must include terms to the effect that the
  61  * license from Licensee to its licensee is limited to the intellectual
  62  * property embodied in the software Licensee provides to its licensee, and
  63  * not to intellectual property embodied in modifications its licensee may
  64  * make.
  65  *
  66  * 3.3. Redistribution of Executable. Redistribution in executable form of any
  67  * substantial portion of the Covered Code or modification must reproduce the
  68  * above Copyright Notice, and the following Disclaimer and Export Compliance
  69  * provision in the documentation and/or other materials provided with the
  70  * distribution.
  71  *
  72  * 3.4. Intel retains all right, title, and interest in and to the Original
  73  * Intel Code.
  74  *
  75  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
  76  * Intel shall be used in advertising or otherwise to promote the sale, use or
  77  * other dealings in products derived from or relating to the Covered Code
  78  * without prior written authorization from Intel.
  79  *
  80  * 4. Disclaimer and Export Compliance
  81  *
  82  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
  83  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
  84  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
  85  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
  86
  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 __EXCREATE_C__
 118
 119 #include "acpi.h"
 120 #include "accommon.h"
 121 #include "acinterp.h"
 122 #include "amlcode.h"
 123 #include "acnamesp.h"
 124
 125
 126 #define _COMPONENT          ACPI_EXECUTER
 127         ACPI_MODULE_NAME    ("excreate")
 128
 129
 130 #ifndef ACPI_NO_METHOD_EXECUTION
 131 /*******************************************************************************
 132  *
 133  * FUNCTION:    AcpiExCreateAlias
 134  *
 135  * PARAMETERS:  WalkState            - Current state, contains operands
 136  *
 137  * RETURN:      Status
 138  *
 139  * DESCRIPTION: Create a new named alias
 140  *
 141  ******************************************************************************/
 142
 143 ACPI_STATUS
 144 AcpiExCreateAlias (
 145     ACPI_WALK_STATE         *WalkState)
 146 {
 147     ACPI_NAMESPACE_NODE     *TargetNode;
 148     ACPI_NAMESPACE_NODE     *AliasNode;
 149     ACPI_STATUS             Status = AE_OK;
 150
 151
 152     ACPI_FUNCTION_TRACE (ExCreateAlias);
 153
 154
 155     /* Get the source/alias operands (both namespace nodes) */
 156
 157     AliasNode =  (ACPI_NAMESPACE_NODE *) WalkState->Operands[0];
 158     TargetNode = (ACPI_NAMESPACE_NODE *) WalkState->Operands[1];
 159
 160     if ((TargetNode->Type == ACPI_TYPE_LOCAL_ALIAS)  ||
 161         (TargetNode->Type == ACPI_TYPE_LOCAL_METHOD_ALIAS))
 162     {
 163         /*
 164          * Dereference an existing alias so that we don't create a chain
 165          * of aliases.  With this code, we guarantee that an alias is
 166          * always exactly one level of indirection away from the
 167          * actual aliased name.
 168          */
 169         TargetNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, TargetNode->Object);
 170     }
 171
 172     /*
 173      * For objects that can never change (i.e., the NS node will
 174      * permanently point to the same object), we can simply attach
 175      * the object to the new NS node.  For other objects (such as
 176      * Integers, buffers, etc.), we have to point the Alias node
 177      * to the original Node.
 178      */
 179     switch (TargetNode->Type)
 180     {
 181
 182     /* For these types, the sub-object can change dynamically via a Store */
 183
 184     case ACPI_TYPE_INTEGER:
 185     case ACPI_TYPE_STRING:
 186     case ACPI_TYPE_BUFFER:
 187     case ACPI_TYPE_PACKAGE:
 188     case ACPI_TYPE_BUFFER_FIELD:
 189
 190     /*
 191      * These types open a new scope, so we need the NS node in order to access
 192      * any children.
 193      */
 194     case ACPI_TYPE_DEVICE:
 195     case ACPI_TYPE_POWER:
 196     case ACPI_TYPE_PROCESSOR:
 197     case ACPI_TYPE_THERMAL:
 198     case ACPI_TYPE_LOCAL_SCOPE:
 199
 200         /*
 201          * The new alias has the type ALIAS and points to the original
 202          * NS node, not the object itself.
 203          */
 204         AliasNode->Type = ACPI_TYPE_LOCAL_ALIAS;
 205         AliasNode->Object = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, TargetNode);
 206         break;
 207
 208     case ACPI_TYPE_METHOD:
 209
 210         /*
 211          * Control method aliases need to be differentiated
 212          */
 213         AliasNode->Type = ACPI_TYPE_LOCAL_METHOD_ALIAS;
 214         AliasNode->Object = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, TargetNode);
 215         break;
 216
 217     default:
 218
 219         /* Attach the original source object to the new Alias Node */
 220
 221         /*
 222          * The new alias assumes the type of the target, and it points
 223          * to the same object.  The reference count of the object has an
 224          * additional reference to prevent deletion out from under either the
 225          * target node or the alias Node
 226          */
 227         Status = AcpiNsAttachObject (AliasNode,
 228                     AcpiNsGetAttachedObject (TargetNode), TargetNode->Type);
 229         break;
 230     }
 231
 232     /* Since both operands are Nodes, we don't need to delete them */
 233
 234     return_ACPI_STATUS (Status);
 235 }
 236
 237
 238 /*******************************************************************************
 239  *
 240  * FUNCTION:    AcpiExCreateEvent
 241  *
 242  * PARAMETERS:  WalkState           - Current state
 243  *
 244  * RETURN:      Status
 245  *
 246  * DESCRIPTION: Create a new event object
 247  *
 248  ******************************************************************************/
 249
 250 ACPI_STATUS
 251 AcpiExCreateEvent (
 252     ACPI_WALK_STATE         *WalkState)
 253 {
 254     ACPI_STATUS             Status;
 255     ACPI_OPERAND_OBJECT     *ObjDesc;
 256
 257
 258     ACPI_FUNCTION_TRACE (ExCreateEvent);
 259
 260
 261     ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_EVENT);
 262     if (!ObjDesc)
 263     {
 264         Status = AE_NO_MEMORY;
 265         goto Cleanup;
 266     }
 267
 268     /*
 269      * Create the actual OS semaphore, with zero initial units -- meaning
 270      * that the event is created in an unsignalled state
 271      */
 272     Status = AcpiOsCreateSemaphore (ACPI_NO_UNIT_LIMIT, 0,
 273                 &ObjDesc->Event.OsSemaphore);
 274     if (ACPI_FAILURE (Status))
 275     {
 276         goto Cleanup;
 277     }
 278
 279     /* Attach object to the Node */
 280
 281     Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) WalkState->Operands[0],
 282                 ObjDesc, ACPI_TYPE_EVENT);
 283
 284 Cleanup:
 285     /*
 286      * Remove local reference to the object (on error, will cause deletion
 287      * of both object and semaphore if present.)
 288      */
 289     AcpiUtRemoveReference (ObjDesc);
 290     return_ACPI_STATUS (Status);
 291 }
 292
 293
 294 /*******************************************************************************
 295  *
 296  * FUNCTION:    AcpiExCreateMutex
 297  *
 298  * PARAMETERS:  WalkState           - Current state
 299  *
 300  * RETURN:      Status
 301  *
 302  * DESCRIPTION: Create a new mutex object
 303  *
 304  *              Mutex (Name[0], SyncLevel[1])
 305  *
 306  ******************************************************************************/
 307
 308 ACPI_STATUS
 309 AcpiExCreateMutex (
 310     ACPI_WALK_STATE         *WalkState)
 311 {
 312     ACPI_STATUS             Status = AE_OK;
 313     ACPI_OPERAND_OBJECT     *ObjDesc;
 314
 315
 316     ACPI_FUNCTION_TRACE_PTR (ExCreateMutex, ACPI_WALK_OPERANDS);
 317
 318
 319     /* Create the new mutex object */
 320
 321     ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_MUTEX);
 322     if (!ObjDesc)
 323     {
 324         Status = AE_NO_MEMORY;
 325         goto Cleanup;
 326     }
 327
 328     /* Create the actual OS Mutex */
 329
 330     Status = AcpiOsCreateMutex (&ObjDesc->Mutex.OsMutex);
 331     if (ACPI_FAILURE (Status))
 332     {
 333         goto Cleanup;
 334     }
 335
 336     /* Init object and attach to NS node */
 337
 338     ObjDesc->Mutex.SyncLevel = (UINT8) WalkState->Operands[1]->Integer.Value;
 339     ObjDesc->Mutex.Node = (ACPI_NAMESPACE_NODE *) WalkState->Operands[0];
 340
 341     Status = AcpiNsAttachObject (ObjDesc->Mutex.Node, ObjDesc, ACPI_TYPE_MUTEX);
 342
 343
 344 Cleanup:
 345     /*
 346      * Remove local reference to the object (on error, will cause deletion
 347      * of both object and semaphore if present.)
 348      */
 349     AcpiUtRemoveReference (ObjDesc);
 350     return_ACPI_STATUS (Status);
 351 }
 352
 353
 354 /*******************************************************************************
 355  *
 356  * FUNCTION:    AcpiExCreateRegion
 357  *
 358  * PARAMETERS:  AmlStart            - Pointer to the region declaration AML
 359  *              AmlLength           - Max length of the declaration AML
 360  *              RegionSpace         - SpaceID for the region
 361  *              WalkState           - Current state
 362  *
 363  * RETURN:      Status
 364  *
 365  * DESCRIPTION: Create a new operation region object
 366  *
 367  ******************************************************************************/
 368
 369 ACPI_STATUS
 370 AcpiExCreateRegion (
 371     UINT8                   *AmlStart,
 372     UINT32                  AmlLength,
 373     UINT8                   RegionSpace,
 374     ACPI_WALK_STATE         *WalkState)
 375 {
 376     ACPI_STATUS             Status;
 377     ACPI_OPERAND_OBJECT     *ObjDesc;
 378     ACPI_NAMESPACE_NODE     *Node;
 379     ACPI_OPERAND_OBJECT     *RegionObj2;
 380
 381
 382     ACPI_FUNCTION_TRACE (ExCreateRegion);
 383
 384
 385     /* Get the Namespace Node */
 386
 387     Node = WalkState->Op->Common.Node;
 388
 389     /*
 390      * If the region object is already attached to this node,
 391      * just return
 392      */
 393     if (AcpiNsGetAttachedObject (Node))
 394     {
 395         return_ACPI_STATUS (AE_OK);
 396     }
 397
 398     /*
 399      * Space ID must be one of the predefined IDs, or in the user-defined
 400      * range
 401      */
 402     if ((RegionSpace >= ACPI_NUM_PREDEFINED_REGIONS) &&
 403         (RegionSpace < ACPI_USER_REGION_BEGIN) &&
 404         (RegionSpace != ACPI_ADR_SPACE_DATA_TABLE))
 405     {
 406         ACPI_ERROR ((AE_INFO, "Invalid AddressSpace type 0x%X", RegionSpace));
 407         return_ACPI_STATUS (AE_AML_INVALID_SPACE_ID);
 408     }
 409
 410     ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "Region Type - %s (0x%X)\n",
 411         AcpiUtGetRegionName (RegionSpace), RegionSpace));
 412
 413     /* Create the region descriptor */
 414
 415     ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_REGION);
 416     if (!ObjDesc)
 417     {
 418         Status = AE_NO_MEMORY;
 419         goto Cleanup;
 420     }
 421
 422     /*
 423      * Remember location in AML stream of address & length
 424      * operands since they need to be evaluated at run time.
 425      */
 426     RegionObj2 = ObjDesc->Common.NextObject;
 427     RegionObj2->Extra.AmlStart = AmlStart;
 428     RegionObj2->Extra.AmlLength = AmlLength;
 429
 430     /* Init the region from the operands */
 431
 432     ObjDesc->Region.SpaceId = RegionSpace;
 433     ObjDesc->Region.Address = 0;
 434     ObjDesc->Region.Length = 0;
 435     ObjDesc->Region.Node = Node;
 436
 437     /* Install the new region object in the parent Node */
 438
 439     Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_REGION);
 440
 441
 442 Cleanup:
 443
 444     /* Remove local reference to the object */
 445
 446     AcpiUtRemoveReference (ObjDesc);
 447     return_ACPI_STATUS (Status);
 448 }
 449
 450
 451 /*******************************************************************************
 452  *
 453  * FUNCTION:    AcpiExCreateProcessor
 454  *
 455  * PARAMETERS:  WalkState           - Current state
 456  *
 457  * RETURN:      Status
 458  *
 459  * DESCRIPTION: Create a new processor object and populate the fields
 460  *
 461  *              Processor (Name[0], CpuID[1], PblockAddr[2], PblockLength[3])
 462  *
 463  ******************************************************************************/
 464
 465 ACPI_STATUS
 466 AcpiExCreateProcessor (
 467     ACPI_WALK_STATE         *WalkState)
 468 {
 469     ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
 470     ACPI_OPERAND_OBJECT     *ObjDesc;
 471     ACPI_STATUS             Status;
 472
 473
 474     ACPI_FUNCTION_TRACE_PTR (ExCreateProcessor, WalkState);
 475
 476
 477     /* Create the processor object */
 478
 479     ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_PROCESSOR);
 480     if (!ObjDesc)
 481     {
 482         return_ACPI_STATUS (AE_NO_MEMORY);
 483     }
 484
 485     /* Initialize the processor object from the operands */
 486
 487     ObjDesc->Processor.ProcId = (UINT8) Operand[1]->Integer.Value;
 488     ObjDesc->Processor.Length = (UINT8) Operand[3]->Integer.Value;
 489     ObjDesc->Processor.Address = (ACPI_IO_ADDRESS) Operand[2]->Integer.Value;
 490
 491     /* Install the processor object in the parent Node */
 492
 493     Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0],
 494                     ObjDesc, ACPI_TYPE_PROCESSOR);
 495
 496     /* Remove local reference to the object */
 497
 498     AcpiUtRemoveReference (ObjDesc);
 499     return_ACPI_STATUS (Status);
 500 }
 501
 502
 503 /*******************************************************************************
 504  *
 505  * FUNCTION:    AcpiExCreatePowerResource
 506  *
 507  * PARAMETERS:  WalkState           - Current state
 508  *
 509  * RETURN:      Status
 510  *
 511  * DESCRIPTION: Create a new PowerResource object and populate the fields
 512  *
 513  *              PowerResource (Name[0], SystemLevel[1], ResourceOrder[2])
 514  *
 515  ******************************************************************************/
 516
 517 ACPI_STATUS
 518 AcpiExCreatePowerResource (
 519     ACPI_WALK_STATE         *WalkState)
 520 {
 521     ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
 522     ACPI_STATUS             Status;
 523     ACPI_OPERAND_OBJECT     *ObjDesc;
 524
 525
 526     ACPI_FUNCTION_TRACE_PTR (ExCreatePowerResource, WalkState);
 527
 528
 529     /* Create the power resource object */
 530
 531     ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_POWER);
 532     if (!ObjDesc)
 533     {
 534         return_ACPI_STATUS (AE_NO_MEMORY);
 535     }
 536
 537     /* Initialize the power object from the operands */
 538
 539     ObjDesc->PowerResource.SystemLevel = (UINT8) Operand[1]->Integer.Value;
 540     ObjDesc->PowerResource.ResourceOrder = (UINT16) Operand[2]->Integer.Value;
 541
 542     /* Install the  power resource object in the parent Node */
 543
 544     Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0],
 545                     ObjDesc, ACPI_TYPE_POWER);
 546
 547     /* Remove local reference to the object */
 548
 549     AcpiUtRemoveReference (ObjDesc);
 550     return_ACPI_STATUS (Status);
 551 }
 552 #endif
 553
 554
 555 /*******************************************************************************
 556  *
 557  * FUNCTION:    AcpiExCreateMethod
 558  *
 559  * PARAMETERS:  AmlStart        - First byte of the method's AML
 560  *              AmlLength       - AML byte count for this method
 561  *              WalkState       - Current state
 562  *
 563  * RETURN:      Status
 564  *
 565  * DESCRIPTION: Create a new method object
 566  *
 567  ******************************************************************************/
 568
 569 ACPI_STATUS
 570 AcpiExCreateMethod (
 571     UINT8                   *AmlStart,
 572     UINT32                  AmlLength,
 573     ACPI_WALK_STATE         *WalkState)
 574 {
 575     ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
 576     ACPI_OPERAND_OBJECT     *ObjDesc;
 577     ACPI_STATUS             Status;
 578     UINT8                   MethodFlags;
 579
 580
 581     ACPI_FUNCTION_TRACE_PTR (ExCreateMethod, WalkState);
 582
 583
 584     /* Create a new method object */
 585
 586     ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_METHOD);
 587     if (!ObjDesc)
 588     {
 589        Status = AE_NO_MEMORY;
 590        goto Exit;
 591     }
 592
 593     /* Save the method's AML pointer and length  */
 594
 595     ObjDesc->Method.AmlStart = AmlStart;
 596     ObjDesc->Method.AmlLength = AmlLength;
 597
 598     /*
 599      * Disassemble the method flags. Split off the ArgCount, Serialized
 600      * flag, and SyncLevel for efficiency.
 601      */
 602     MethodFlags = (UINT8) Operand[1]->Integer.Value;
 603     ObjDesc->Method.ParamCount = (UINT8) (MethodFlags & AML_METHOD_ARG_COUNT);
 604
 605     /*
 606      * Get the SyncLevel. If method is serialized, a mutex will be
 607      * created for this method when it is parsed.
 608      */
 609     if (MethodFlags & AML_METHOD_SERIALIZED)
 610     {
 611         ObjDesc->Method.InfoFlags = ACPI_METHOD_SERIALIZED;
 612
 613         /*
 614          * ACPI 1.0: SyncLevel = 0
 615          * ACPI 2.0: SyncLevel = SyncLevel in method declaration
 616          */
 617         ObjDesc->Method.SyncLevel = (UINT8)
 618             ((MethodFlags & AML_METHOD_SYNC_LEVEL) >> 4);
 619     }
 620
 621     /* Attach the new object to the method Node */
 622
 623     Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0],
 624                     ObjDesc, ACPI_TYPE_METHOD);
 625
 626     /* Remove local reference to the object */
 627
 628     AcpiUtRemoveReference (ObjDesc);
 629
 630 Exit:
 631     /* Remove a reference to the operand */
 632
 633     AcpiUtRemoveReference (Operand[1]);
 634     return_ACPI_STATUS (Status);
 635 }
 636
 637