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 - 2018, 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 * Alternatively, you may choose to be licensed under the terms of the
118 * following license:
119 *
120 * Redistribution and use in source and binary forms, with or without
121 * modification, are permitted provided that the following conditions
122 * are met:
123 * 1. Redistributions of source code must retain the above copyright
124 *    notice, this list of conditions, and the following disclaimer,
125 *    without modification.
126 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
127 *    substantially similar to the "NO WARRANTY" disclaimer below
128 *    ("Disclaimer") and any redistribution must be conditioned upon
129 *    including a substantially similar Disclaimer requirement for further
130 *    binary redistribution.
131 * 3. Neither the names of the above-listed copyright holders nor the names
132 *    of any contributors may be used to endorse or promote products derived
133 *    from this software without specific prior written permission.
134 *
135 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
136 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
137 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
138 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
139 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
140 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
141 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
142 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
143 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
144 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
145 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
146 *
147 * Alternatively, you may choose to be licensed under the terms of the
148 * GNU General Public License ("GPL") version 2 as published by the Free
149 * Software Foundation.
150 *
151 *****************************************************************************/
152
153#include "acpi.h"
154#include "accommon.h"
155#include "acinterp.h"
156#include "amlcode.h"
157#include "acnamesp.h"
158
159
160#define _COMPONENT          ACPI_EXECUTER
161        ACPI_MODULE_NAME    ("excreate")
162
163
164/*******************************************************************************
165 *
166 * FUNCTION:    AcpiExCreateAlias
167 *
168 * PARAMETERS:  WalkState            - Current state, contains operands
169 *
170 * RETURN:      Status
171 *
172 * DESCRIPTION: Create a new named alias
173 *
174 ******************************************************************************/
175
176ACPI_STATUS
177AcpiExCreateAlias (
178    ACPI_WALK_STATE         *WalkState)
179{
180    ACPI_NAMESPACE_NODE     *TargetNode;
181    ACPI_NAMESPACE_NODE     *AliasNode;
182    ACPI_STATUS             Status = AE_OK;
183
184
185    ACPI_FUNCTION_TRACE (ExCreateAlias);
186
187
188    /* Get the source/alias operands (both namespace nodes) */
189
190    AliasNode =  (ACPI_NAMESPACE_NODE *) WalkState->Operands[0];
191    TargetNode = (ACPI_NAMESPACE_NODE *) WalkState->Operands[1];
192
193    if ((TargetNode->Type == ACPI_TYPE_LOCAL_ALIAS)  ||
194        (TargetNode->Type == ACPI_TYPE_LOCAL_METHOD_ALIAS))
195    {
196        /*
197         * Dereference an existing alias so that we don't create a chain
198         * of aliases. With this code, we guarantee that an alias is
199         * always exactly one level of indirection away from the
200         * actual aliased name.
201         */
202        TargetNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, TargetNode->Object);
203    }
204
205    /* Ensure that the target node is valid */
206
207    if (!TargetNode)
208    {
209        return_ACPI_STATUS (AE_NULL_OBJECT);
210    }
211
212    /* Construct the alias object (a namespace node) */
213
214    switch (TargetNode->Type)
215    {
216    case ACPI_TYPE_METHOD:
217        /*
218         * Control method aliases need to be differentiated with
219         * a special type
220         */
221        AliasNode->Type = ACPI_TYPE_LOCAL_METHOD_ALIAS;
222        break;
223
224    default:
225        /*
226         * All other object types.
227         *
228         * The new alias has the type ALIAS and points to the original
229         * NS node, not the object itself.
230         */
231        AliasNode->Type = ACPI_TYPE_LOCAL_ALIAS;
232        AliasNode->Object = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, TargetNode);
233        break;
234    }
235
236    /* Since both operands are Nodes, we don't need to delete them */
237
238    AliasNode->Object = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, TargetNode);
239    return_ACPI_STATUS (Status);
240}
241
242
243/*******************************************************************************
244 *
245 * FUNCTION:    AcpiExCreateEvent
246 *
247 * PARAMETERS:  WalkState           - Current state
248 *
249 * RETURN:      Status
250 *
251 * DESCRIPTION: Create a new event object
252 *
253 ******************************************************************************/
254
255ACPI_STATUS
256AcpiExCreateEvent (
257    ACPI_WALK_STATE         *WalkState)
258{
259    ACPI_STATUS             Status;
260    ACPI_OPERAND_OBJECT     *ObjDesc;
261
262
263    ACPI_FUNCTION_TRACE (ExCreateEvent);
264
265
266    ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_EVENT);
267    if (!ObjDesc)
268    {
269        Status = AE_NO_MEMORY;
270        goto Cleanup;
271    }
272
273    /*
274     * Create the actual OS semaphore, with zero initial units -- meaning
275     * that the event is created in an unsignalled state
276     */
277    Status = AcpiOsCreateSemaphore (ACPI_NO_UNIT_LIMIT, 0,
278        &ObjDesc->Event.OsSemaphore);
279    if (ACPI_FAILURE (Status))
280    {
281        goto Cleanup;
282    }
283
284    /* Attach object to the Node */
285
286    Status = AcpiNsAttachObject (
287        (ACPI_NAMESPACE_NODE *) WalkState->Operands[0],
288        ObjDesc, ACPI_TYPE_EVENT);
289
290Cleanup:
291    /*
292     * Remove local reference to the object (on error, will cause deletion
293     * of both object and semaphore if present.)
294     */
295    AcpiUtRemoveReference (ObjDesc);
296    return_ACPI_STATUS (Status);
297}
298
299
300/*******************************************************************************
301 *
302 * FUNCTION:    AcpiExCreateMutex
303 *
304 * PARAMETERS:  WalkState           - Current state
305 *
306 * RETURN:      Status
307 *
308 * DESCRIPTION: Create a new mutex object
309 *
310 *              Mutex (Name[0], SyncLevel[1])
311 *
312 ******************************************************************************/
313
314ACPI_STATUS
315AcpiExCreateMutex (
316    ACPI_WALK_STATE         *WalkState)
317{
318    ACPI_STATUS             Status = AE_OK;
319    ACPI_OPERAND_OBJECT     *ObjDesc;
320
321
322    ACPI_FUNCTION_TRACE_PTR (ExCreateMutex, ACPI_WALK_OPERANDS);
323
324
325    /* Create the new mutex object */
326
327    ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_MUTEX);
328    if (!ObjDesc)
329    {
330        Status = AE_NO_MEMORY;
331        goto Cleanup;
332    }
333
334    /* Create the actual OS Mutex */
335
336    Status = AcpiOsCreateMutex (&ObjDesc->Mutex.OsMutex);
337    if (ACPI_FAILURE (Status))
338    {
339        goto Cleanup;
340    }
341
342    /* Init object and attach to NS node */
343
344    ObjDesc->Mutex.SyncLevel = (UINT8) WalkState->Operands[1]->Integer.Value;
345    ObjDesc->Mutex.Node = (ACPI_NAMESPACE_NODE *) WalkState->Operands[0];
346
347    Status = AcpiNsAttachObject (
348        ObjDesc->Mutex.Node, ObjDesc, ACPI_TYPE_MUTEX);
349
350
351Cleanup:
352    /*
353     * Remove local reference to the object (on error, will cause deletion
354     * of both object and semaphore if present.)
355     */
356    AcpiUtRemoveReference (ObjDesc);
357    return_ACPI_STATUS (Status);
358}
359
360
361/*******************************************************************************
362 *
363 * FUNCTION:    AcpiExCreateRegion
364 *
365 * PARAMETERS:  AmlStart            - Pointer to the region declaration AML
366 *              AmlLength           - Max length of the declaration AML
367 *              SpaceId             - Address space ID for the region
368 *              WalkState           - Current state
369 *
370 * RETURN:      Status
371 *
372 * DESCRIPTION: Create a new operation region object
373 *
374 ******************************************************************************/
375
376ACPI_STATUS
377AcpiExCreateRegion (
378    UINT8                   *AmlStart,
379    UINT32                  AmlLength,
380    UINT8                   SpaceId,
381    ACPI_WALK_STATE         *WalkState)
382{
383    ACPI_STATUS             Status;
384    ACPI_OPERAND_OBJECT     *ObjDesc;
385    ACPI_NAMESPACE_NODE     *Node;
386    ACPI_OPERAND_OBJECT     *RegionObj2;
387
388
389    ACPI_FUNCTION_TRACE (ExCreateRegion);
390
391
392    /* Get the Namespace Node */
393
394    Node = WalkState->Op->Common.Node;
395
396    /*
397     * If the region object is already attached to this node,
398     * just return
399     */
400    if (AcpiNsGetAttachedObject (Node))
401    {
402        return_ACPI_STATUS (AE_OK);
403    }
404
405    /*
406     * Space ID must be one of the predefined IDs, or in the user-defined
407     * range
408     */
409    if (!AcpiIsValidSpaceId (SpaceId))
410    {
411        /*
412         * Print an error message, but continue. We don't want to abort
413         * a table load for this exception. Instead, if the region is
414         * actually used at runtime, abort the executing method.
415         */
416        ACPI_ERROR ((AE_INFO,
417            "Invalid/unknown Address Space ID: 0x%2.2X", SpaceId));
418    }
419
420    ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "Region Type - %s (0x%X)\n",
421        AcpiUtGetRegionName (SpaceId), SpaceId));
422
423    /* Create the region descriptor */
424
425    ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_REGION);
426    if (!ObjDesc)
427    {
428        Status = AE_NO_MEMORY;
429        goto Cleanup;
430    }
431
432    /*
433     * Remember location in AML stream of address & length
434     * operands since they need to be evaluated at run time.
435     */
436    RegionObj2 = AcpiNsGetSecondaryObject (ObjDesc);
437    RegionObj2->Extra.AmlStart = AmlStart;
438    RegionObj2->Extra.AmlLength = AmlLength;
439    RegionObj2->Extra.Method_REG = NULL;
440    if (WalkState->ScopeInfo)
441    {
442        RegionObj2->Extra.ScopeNode = WalkState->ScopeInfo->Scope.Node;
443    }
444    else
445    {
446        RegionObj2->Extra.ScopeNode = Node;
447    }
448
449    /* Init the region from the operands */
450
451    ObjDesc->Region.SpaceId = SpaceId;
452    ObjDesc->Region.Address = 0;
453    ObjDesc->Region.Length = 0;
454    ObjDesc->Region.Node = Node;
455    ObjDesc->Region.Handler = NULL;
456    ObjDesc->Common.Flags &=
457        ~(AOPOBJ_SETUP_COMPLETE | AOPOBJ_REG_CONNECTED |
458          AOPOBJ_OBJECT_INITIALIZED);
459
460    /* Install the new region object in the parent Node */
461
462    Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_REGION);
463
464
465Cleanup:
466
467    /* Remove local reference to the object */
468
469    AcpiUtRemoveReference (ObjDesc);
470    return_ACPI_STATUS (Status);
471}
472
473
474/*******************************************************************************
475 *
476 * FUNCTION:    AcpiExCreateProcessor
477 *
478 * PARAMETERS:  WalkState           - Current state
479 *
480 * RETURN:      Status
481 *
482 * DESCRIPTION: Create a new processor object and populate the fields
483 *
484 *              Processor (Name[0], CpuID[1], PblockAddr[2], PblockLength[3])
485 *
486 ******************************************************************************/
487
488ACPI_STATUS
489AcpiExCreateProcessor (
490    ACPI_WALK_STATE         *WalkState)
491{
492    ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
493    ACPI_OPERAND_OBJECT     *ObjDesc;
494    ACPI_STATUS             Status;
495
496
497    ACPI_FUNCTION_TRACE_PTR (ExCreateProcessor, WalkState);
498
499
500    /* Create the processor object */
501
502    ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_PROCESSOR);
503    if (!ObjDesc)
504    {
505        return_ACPI_STATUS (AE_NO_MEMORY);
506    }
507
508    /* Initialize the processor object from the operands */
509
510    ObjDesc->Processor.ProcId = (UINT8) Operand[1]->Integer.Value;
511    ObjDesc->Processor.Length = (UINT8) Operand[3]->Integer.Value;
512    ObjDesc->Processor.Address = (ACPI_IO_ADDRESS) Operand[2]->Integer.Value;
513
514    /* Install the processor object in the parent Node */
515
516    Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0],
517        ObjDesc, ACPI_TYPE_PROCESSOR);
518
519    /* Remove local reference to the object */
520
521    AcpiUtRemoveReference (ObjDesc);
522    return_ACPI_STATUS (Status);
523}
524
525
526/*******************************************************************************
527 *
528 * FUNCTION:    AcpiExCreatePowerResource
529 *
530 * PARAMETERS:  WalkState           - Current state
531 *
532 * RETURN:      Status
533 *
534 * DESCRIPTION: Create a new PowerResource object and populate the fields
535 *
536 *              PowerResource (Name[0], SystemLevel[1], ResourceOrder[2])
537 *
538 ******************************************************************************/
539
540ACPI_STATUS
541AcpiExCreatePowerResource (
542    ACPI_WALK_STATE         *WalkState)
543{
544    ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
545    ACPI_STATUS             Status;
546    ACPI_OPERAND_OBJECT     *ObjDesc;
547
548
549    ACPI_FUNCTION_TRACE_PTR (ExCreatePowerResource, WalkState);
550
551
552    /* Create the power resource object */
553
554    ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_POWER);
555    if (!ObjDesc)
556    {
557        return_ACPI_STATUS (AE_NO_MEMORY);
558    }
559
560    /* Initialize the power object from the operands */
561
562    ObjDesc->PowerResource.SystemLevel = (UINT8) Operand[1]->Integer.Value;
563    ObjDesc->PowerResource.ResourceOrder = (UINT16) Operand[2]->Integer.Value;
564
565    /* Install the  power resource object in the parent Node */
566
567    Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0],
568        ObjDesc, ACPI_TYPE_POWER);
569
570    /* Remove local reference to the object */
571
572    AcpiUtRemoveReference (ObjDesc);
573    return_ACPI_STATUS (Status);
574}
575
576
577/*******************************************************************************
578 *
579 * FUNCTION:    AcpiExCreateMethod
580 *
581 * PARAMETERS:  AmlStart        - First byte of the method's AML
582 *              AmlLength       - AML byte count for this method
583 *              WalkState       - Current state
584 *
585 * RETURN:      Status
586 *
587 * DESCRIPTION: Create a new method object
588 *
589 ******************************************************************************/
590
591ACPI_STATUS
592AcpiExCreateMethod (
593    UINT8                   *AmlStart,
594    UINT32                  AmlLength,
595    ACPI_WALK_STATE         *WalkState)
596{
597    ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
598    ACPI_OPERAND_OBJECT     *ObjDesc;
599    ACPI_STATUS             Status;
600    UINT8                   MethodFlags;
601
602
603    ACPI_FUNCTION_TRACE_PTR (ExCreateMethod, WalkState);
604
605
606    /* Create a new method object */
607
608    ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_METHOD);
609    if (!ObjDesc)
610    {
611       Status = AE_NO_MEMORY;
612       goto Exit;
613    }
614
615    /* Save the method's AML pointer and length  */
616
617    ObjDesc->Method.AmlStart = AmlStart;
618    ObjDesc->Method.AmlLength = AmlLength;
619    ObjDesc->Method.Node = Operand[0];
620
621    /*
622     * Disassemble the method flags. Split off the ArgCount, Serialized
623     * flag, and SyncLevel for efficiency.
624     */
625    MethodFlags = (UINT8) Operand[1]->Integer.Value;
626    ObjDesc->Method.ParamCount = (UINT8)
627        (MethodFlags & AML_METHOD_ARG_COUNT);
628
629    /*
630     * Get the SyncLevel. If method is serialized, a mutex will be
631     * created for this method when it is parsed.
632     */
633    if (MethodFlags & AML_METHOD_SERIALIZED)
634    {
635        ObjDesc->Method.InfoFlags = ACPI_METHOD_SERIALIZED;
636
637        /*
638         * ACPI 1.0: SyncLevel = 0
639         * ACPI 2.0: SyncLevel = SyncLevel in method declaration
640         */
641        ObjDesc->Method.SyncLevel = (UINT8)
642            ((MethodFlags & AML_METHOD_SYNC_LEVEL) >> 4);
643    }
644
645    /* Attach the new object to the method Node */
646
647    Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0],
648        ObjDesc, ACPI_TYPE_METHOD);
649
650    /* Remove local reference to the object */
651
652    AcpiUtRemoveReference (ObjDesc);
653
654Exit:
655    /* Remove a reference to the operand */
656
657    AcpiUtRemoveReference (Operand[1]);
658    return_ACPI_STATUS (Status);
659}
660