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1498 serge 1
/******************************************************************************
2
 *
3
 * Module Name: nsxfname - Public interfaces to the ACPI subsystem
4
 *                         ACPI Namespace oriented interfaces
5
 *
6
 *****************************************************************************/
7
 
8
/******************************************************************************
9
 *
10
 * 1. Copyright Notice
11
 *
2216 Serge 12
 * Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
1498 serge 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 __NSXFNAME_C__
118
 
119
#include "acpi.h"
120
#include "accommon.h"
121
#include "acnamesp.h"
122
#include "acparser.h"
123
#include "amlcode.h"
124
 
125
 
126
#define _COMPONENT          ACPI_NAMESPACE
127
        ACPI_MODULE_NAME    ("nsxfname")
128
 
129
/* Local prototypes */
130
 
131
static char *
132
AcpiNsCopyDeviceId (
133
    ACPI_DEVICE_ID          *Dest,
134
    ACPI_DEVICE_ID          *Source,
135
    char                    *StringArea);
136
 
137
 
138
/******************************************************************************
139
 *
140
 * FUNCTION:    AcpiGetHandle
141
 *
142
 * PARAMETERS:  Parent          - Object to search under (search scope).
143
 *              Pathname        - Pointer to an asciiz string containing the
144
 *                                name
145
 *              RetHandle       - Where the return handle is returned
146
 *
147
 * RETURN:      Status
148
 *
149
 * DESCRIPTION: This routine will search for a caller specified name in the
150
 *              name space.  The caller can restrict the search region by
151
 *              specifying a non NULL parent.  The parent value is itself a
152
 *              namespace handle.
153
 *
154
 ******************************************************************************/
155
 
156
ACPI_STATUS
157
AcpiGetHandle (
158
    ACPI_HANDLE             Parent,
159
    ACPI_STRING             Pathname,
160
    ACPI_HANDLE             *RetHandle)
161
{
162
    ACPI_STATUS             Status;
163
    ACPI_NAMESPACE_NODE     *Node = NULL;
164
    ACPI_NAMESPACE_NODE     *PrefixNode = NULL;
165
 
166
 
167
    ACPI_FUNCTION_ENTRY ();
168
 
169
 
170
    /* Parameter Validation */
171
 
172
    if (!RetHandle || !Pathname)
173
    {
174
        return (AE_BAD_PARAMETER);
175
    }
176
 
177
    /* Convert a parent handle to a prefix node */
178
 
179
    if (Parent)
180
    {
181
        PrefixNode = AcpiNsValidateHandle (Parent);
182
        if (!PrefixNode)
183
        {
184
            return (AE_BAD_PARAMETER);
185
        }
186
    }
187
 
188
    /*
189
     * Valid cases are:
190
     * 1) Fully qualified pathname
191
     * 2) Parent + Relative pathname
192
     *
193
     * Error for 
194
     */
195
    if (AcpiNsValidRootPrefix (Pathname[0]))
196
    {
197
        /* Pathname is fully qualified (starts with '\') */
198
 
199
        /* Special case for root-only, since we can't search for it */
200
 
201
        if (!ACPI_STRCMP (Pathname, ACPI_NS_ROOT_PATH))
202
        {
203
            *RetHandle = ACPI_CAST_PTR (ACPI_HANDLE, AcpiGbl_RootNode);
204
            return (AE_OK);
205
        }
206
    }
207
    else if (!PrefixNode)
208
    {
209
        /* Relative path with null prefix is disallowed */
210
 
211
        return (AE_BAD_PARAMETER);
212
    }
213
 
214
    /* Find the Node and convert to a handle */
215
 
216
    Status = AcpiNsGetNode (PrefixNode, Pathname, ACPI_NS_NO_UPSEARCH, &Node);
217
    if (ACPI_SUCCESS (Status))
218
    {
219
        *RetHandle = ACPI_CAST_PTR (ACPI_HANDLE, Node);
220
    }
221
 
222
    return (Status);
223
}
224
 
225
ACPI_EXPORT_SYMBOL (AcpiGetHandle)
226
 
227
 
228
/******************************************************************************
229
 *
230
 * FUNCTION:    AcpiGetName
231
 *
232
 * PARAMETERS:  Handle          - Handle to be converted to a pathname
233
 *              NameType        - Full pathname or single segment
234
 *              Buffer          - Buffer for returned path
235
 *
236
 * RETURN:      Pointer to a string containing the fully qualified Name.
237
 *
238
 * DESCRIPTION: This routine returns the fully qualified name associated with
239
 *              the Handle parameter.  This and the AcpiPathnameToHandle are
240
 *              complementary functions.
241
 *
242
 ******************************************************************************/
243
 
244
ACPI_STATUS
245
AcpiGetName (
246
    ACPI_HANDLE             Handle,
247
    UINT32                  NameType,
248
    ACPI_BUFFER             *Buffer)
249
{
250
    ACPI_STATUS             Status;
251
    ACPI_NAMESPACE_NODE     *Node;
252
 
253
 
254
    /* Parameter validation */
255
 
256
    if (NameType > ACPI_NAME_TYPE_MAX)
257
    {
258
        return (AE_BAD_PARAMETER);
259
    }
260
 
261
    Status = AcpiUtValidateBuffer (Buffer);
262
    if (ACPI_FAILURE (Status))
263
    {
264
        return (Status);
265
    }
266
 
267
    if (NameType == ACPI_FULL_PATHNAME)
268
    {
269
        /* Get the full pathname (From the namespace root) */
270
 
271
        Status = AcpiNsHandleToPathname (Handle, Buffer);
272
        return (Status);
273
    }
274
 
275
    /*
276
     * Wants the single segment ACPI name.
277
     * Validate handle and convert to a namespace Node
278
     */
279
    Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
280
    if (ACPI_FAILURE (Status))
281
    {
282
        return (Status);
283
    }
284
 
285
    Node = AcpiNsValidateHandle (Handle);
286
    if (!Node)
287
    {
288
        Status = AE_BAD_PARAMETER;
289
        goto UnlockAndExit;
290
    }
291
 
292
    /* Validate/Allocate/Clear caller buffer */
293
 
294
    Status = AcpiUtInitializeBuffer (Buffer, ACPI_PATH_SEGMENT_LENGTH);
295
    if (ACPI_FAILURE (Status))
296
    {
297
        goto UnlockAndExit;
298
    }
299
 
300
    /* Just copy the ACPI name from the Node and zero terminate it */
301
 
302
    ACPI_STRNCPY (Buffer->Pointer, AcpiUtGetNodeName (Node),
303
                ACPI_NAME_SIZE);
304
    ((char *) Buffer->Pointer) [ACPI_NAME_SIZE] = 0;
305
    Status = AE_OK;
306
 
307
 
308
UnlockAndExit:
309
 
310
    (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
311
    return (Status);
312
}
313
 
314
ACPI_EXPORT_SYMBOL (AcpiGetName)
315
 
316
 
317
/******************************************************************************
318
 *
319
 * FUNCTION:    AcpiNsCopyDeviceId
320
 *
321
 * PARAMETERS:  Dest                - Pointer to the destination DEVICE_ID
322
 *              Source              - Pointer to the source DEVICE_ID
323
 *              StringArea          - Pointer to where to copy the dest string
324
 *
325
 * RETURN:      Pointer to the next string area
326
 *
327
 * DESCRIPTION: Copy a single DEVICE_ID, including the string data.
328
 *
329
 ******************************************************************************/
330
 
331
static char *
332
AcpiNsCopyDeviceId (
333
    ACPI_DEVICE_ID          *Dest,
334
    ACPI_DEVICE_ID          *Source,
335
    char                    *StringArea)
336
{
337
    /* Create the destination DEVICE_ID */
338
 
339
    Dest->String = StringArea;
340
    Dest->Length = Source->Length;
341
 
342
    /* Copy actual string and return a pointer to the next string area */
343
 
344
    ACPI_MEMCPY (StringArea, Source->String, Source->Length);
345
    return (StringArea + Source->Length);
346
}
347
 
348
 
349
/******************************************************************************
350
 *
351
 * FUNCTION:    AcpiGetObjectInfo
352
 *
353
 * PARAMETERS:  Handle              - Object Handle
354
 *              ReturnBuffer        - Where the info is returned
355
 *
356
 * RETURN:      Status
357
 *
358
 * DESCRIPTION: Returns information about an object as gleaned from the
359
 *              namespace node and possibly by running several standard
360
 *              control methods (Such as in the case of a device.)
361
 *
362
 * For Device and Processor objects, run the Device _HID, _UID, _CID, _STA,
363
 * _ADR, _SxW, and _SxD methods.
364
 *
365
 * Note: Allocates the return buffer, must be freed by the caller.
366
 *
367
 ******************************************************************************/
368
 
369
ACPI_STATUS
370
AcpiGetObjectInfo (
371
    ACPI_HANDLE             Handle,
372
    ACPI_DEVICE_INFO        **ReturnBuffer)
373
{
374
    ACPI_NAMESPACE_NODE     *Node;
375
    ACPI_DEVICE_INFO        *Info;
376
    ACPI_DEVICE_ID_LIST     *CidList = NULL;
377
    ACPI_DEVICE_ID          *Hid = NULL;
378
    ACPI_DEVICE_ID          *Uid = NULL;
379
    char                    *NextIdString;
380
    ACPI_OBJECT_TYPE        Type;
381
    ACPI_NAME               Name;
382
    UINT8                   ParamCount= 0;
383
    UINT8                   Valid = 0;
384
    UINT32                  InfoSize;
385
    UINT32                  i;
386
    ACPI_STATUS             Status;
387
 
388
 
389
    /* Parameter validation */
390
 
391
    if (!Handle || !ReturnBuffer)
392
    {
393
        return (AE_BAD_PARAMETER);
394
    }
395
 
396
    Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
397
    if (ACPI_FAILURE (Status))
398
    {
399
        goto Cleanup;
400
    }
401
 
402
    Node = AcpiNsValidateHandle (Handle);
403
    if (!Node)
404
    {
405
        (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
406
        return (AE_BAD_PARAMETER);
407
    }
408
 
409
    /* Get the namespace node data while the namespace is locked */
410
 
411
    InfoSize = sizeof (ACPI_DEVICE_INFO);
412
    Type = Node->Type;
413
    Name = Node->Name.Integer;
414
 
415
    if (Node->Type == ACPI_TYPE_METHOD)
416
    {
417
        ParamCount = Node->Object->Method.ParamCount;
418
    }
419
 
420
    Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
421
    if (ACPI_FAILURE (Status))
422
    {
423
        return (Status);
424
    }
425
 
426
    if ((Type == ACPI_TYPE_DEVICE) ||
427
        (Type == ACPI_TYPE_PROCESSOR))
428
    {
429
        /*
430
         * Get extra info for ACPI Device/Processor objects only:
431
         * Run the Device _HID, _UID, and _CID methods.
432
         *
433
         * Note: none of these methods are required, so they may or may
434
         * not be present for this device. The Info->Valid bitfield is used
435
         * to indicate which methods were found and run successfully.
436
         */
437
 
438
        /* Execute the Device._HID method */
439
 
440
        Status = AcpiUtExecute_HID (Node, &Hid);
441
        if (ACPI_SUCCESS (Status))
442
        {
443
            InfoSize += Hid->Length;
444
            Valid |= ACPI_VALID_HID;
445
        }
446
 
447
        /* Execute the Device._UID method */
448
 
449
        Status = AcpiUtExecute_UID (Node, &Uid);
450
        if (ACPI_SUCCESS (Status))
451
        {
452
            InfoSize += Uid->Length;
453
            Valid |= ACPI_VALID_UID;
454
        }
455
 
456
        /* Execute the Device._CID method */
457
 
458
        Status = AcpiUtExecute_CID (Node, &CidList);
459
        if (ACPI_SUCCESS (Status))
460
        {
461
            /* Add size of CID strings and CID pointer array */
462
 
463
            InfoSize += (CidList->ListSize - sizeof (ACPI_DEVICE_ID_LIST));
464
            Valid |= ACPI_VALID_CID;
465
        }
466
    }
467
 
468
    /*
469
     * Now that we have the variable-length data, we can allocate the
470
     * return buffer
471
     */
472
    Info = ACPI_ALLOCATE_ZEROED (InfoSize);
473
    if (!Info)
474
    {
475
        Status = AE_NO_MEMORY;
476
        goto Cleanup;
477
    }
478
 
479
    /* Get the fixed-length data */
480
 
481
    if ((Type == ACPI_TYPE_DEVICE) ||
482
        (Type == ACPI_TYPE_PROCESSOR))
483
    {
484
        /*
485
         * Get extra info for ACPI Device/Processor objects only:
486
         * Run the _STA, _ADR and, SxW, and _SxD methods.
487
         *
488
         * Note: none of these methods are required, so they may or may
489
         * not be present for this device. The Info->Valid bitfield is used
490
         * to indicate which methods were found and run successfully.
491
         */
492
 
493
        /* Execute the Device._STA method */
494
 
495
        Status = AcpiUtExecute_STA (Node, &Info->CurrentStatus);
496
        if (ACPI_SUCCESS (Status))
497
        {
498
            Valid |= ACPI_VALID_STA;
499
        }
500
 
501
        /* Execute the Device._ADR method */
502
 
503
        Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR, Node,
504
                    &Info->Address);
505
        if (ACPI_SUCCESS (Status))
506
        {
507
            Valid |= ACPI_VALID_ADR;
508
        }
509
 
510
        /* Execute the Device._SxW methods */
511
 
512
        Status = AcpiUtExecutePowerMethods (Node,
513
                    AcpiGbl_LowestDstateNames, ACPI_NUM_SxW_METHODS,
514
                    Info->LowestDstates);
515
        if (ACPI_SUCCESS (Status))
516
        {
517
            Valid |= ACPI_VALID_SXWS;
518
        }
519
 
520
        /* Execute the Device._SxD methods */
521
 
522
        Status = AcpiUtExecutePowerMethods (Node,
523
                    AcpiGbl_HighestDstateNames, ACPI_NUM_SxD_METHODS,
524
                    Info->HighestDstates);
525
        if (ACPI_SUCCESS (Status))
526
        {
527
            Valid |= ACPI_VALID_SXDS;
528
        }
529
    }
530
 
531
    /*
532
     * Create a pointer to the string area of the return buffer.
533
     * Point to the end of the base ACPI_DEVICE_INFO structure.
534
     */
535
    NextIdString = ACPI_CAST_PTR (char, Info->CompatibleIdList.Ids);
536
    if (CidList)
537
    {
538
        /* Point past the CID DEVICE_ID array */
539
 
540
        NextIdString += ((ACPI_SIZE) CidList->Count * sizeof (ACPI_DEVICE_ID));
541
    }
542
 
543
    /*
544
     * Copy the HID, UID, and CIDs to the return buffer. The variable-length
545
     * strings are copied to the reserved area at the end of the buffer.
546
     *
547
     * For HID and CID, check if the ID is a PCI Root Bridge.
548
     */
549
    if (Hid)
550
    {
551
        NextIdString = AcpiNsCopyDeviceId (&Info->HardwareId,
552
            Hid, NextIdString);
553
 
554
        if (AcpiUtIsPciRootBridge (Hid->String))
555
        {
556
            Info->Flags |= ACPI_PCI_ROOT_BRIDGE;
557
        }
558
    }
559
 
560
    if (Uid)
561
    {
562
        NextIdString = AcpiNsCopyDeviceId (&Info->UniqueId,
563
            Uid, NextIdString);
564
    }
565
 
566
    if (CidList)
567
    {
568
        Info->CompatibleIdList.Count = CidList->Count;
569
        Info->CompatibleIdList.ListSize = CidList->ListSize;
570
 
571
        /* Copy each CID */
572
 
573
        for (i = 0; i < CidList->Count; i++)
574
        {
575
            NextIdString = AcpiNsCopyDeviceId (&Info->CompatibleIdList.Ids[i],
576
                &CidList->Ids[i], NextIdString);
577
 
578
            if (AcpiUtIsPciRootBridge (CidList->Ids[i].String))
579
            {
580
                Info->Flags |= ACPI_PCI_ROOT_BRIDGE;
581
            }
582
        }
583
    }
584
 
585
    /* Copy the fixed-length data */
586
 
587
    Info->InfoSize = InfoSize;
588
    Info->Type = Type;
589
    Info->Name = Name;
590
    Info->ParamCount = ParamCount;
591
    Info->Valid = Valid;
592
 
593
    *ReturnBuffer = Info;
594
    Status = AE_OK;
595
 
596
 
597
Cleanup:
598
    if (Hid)
599
    {
600
        ACPI_FREE (Hid);
601
    }
602
    if (Uid)
603
    {
604
        ACPI_FREE (Uid);
605
    }
606
    if (CidList)
607
    {
608
        ACPI_FREE (CidList);
609
    }
610
    return (Status);
611
}
612
 
613
ACPI_EXPORT_SYMBOL (AcpiGetObjectInfo)
614
 
615
 
616
/******************************************************************************
617
 *
618
 * FUNCTION:    AcpiInstallMethod
619
 *
620
 * PARAMETERS:  Buffer         - An ACPI table containing one control method
621
 *
622
 * RETURN:      Status
623
 *
624
 * DESCRIPTION: Install a control method into the namespace. If the method
625
 *              name already exists in the namespace, it is overwritten. The
626
 *              input buffer must contain a valid DSDT or SSDT containing a
627
 *              single control method.
628
 *
629
 ******************************************************************************/
630
 
631
ACPI_STATUS
632
AcpiInstallMethod (
633
    UINT8                   *Buffer)
634
{
635
    ACPI_TABLE_HEADER       *Table = ACPI_CAST_PTR (ACPI_TABLE_HEADER, Buffer);
636
    UINT8                   *AmlBuffer;
637
    UINT8                   *AmlStart;
638
    char                    *Path;
639
    ACPI_NAMESPACE_NODE     *Node;
640
    ACPI_OPERAND_OBJECT     *MethodObj;
641
    ACPI_PARSE_STATE        ParserState;
642
    UINT32                  AmlLength;
643
    UINT16                  Opcode;
644
    UINT8                   MethodFlags;
645
    ACPI_STATUS             Status;
646
 
647
 
648
    /* Parameter validation */
649
 
650
    if (!Buffer)
651
    {
652
        return (AE_BAD_PARAMETER);
653
    }
654
 
655
    /* Table must be a DSDT or SSDT */
656
 
657
    if (!ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_DSDT) &&
658
        !ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_SSDT))
659
    {
660
        return (AE_BAD_HEADER);
661
    }
662
 
663
    /* First AML opcode in the table must be a control method */
664
 
665
    ParserState.Aml = Buffer + sizeof (ACPI_TABLE_HEADER);
666
    Opcode = AcpiPsPeekOpcode (&ParserState);
667
    if (Opcode != AML_METHOD_OP)
668
    {
669
        return (AE_BAD_PARAMETER);
670
    }
671
 
672
    /* Extract method information from the raw AML */
673
 
674
    ParserState.Aml += AcpiPsGetOpcodeSize (Opcode);
675
    ParserState.PkgEnd = AcpiPsGetNextPackageEnd (&ParserState);
676
    Path = AcpiPsGetNextNamestring (&ParserState);
677
    MethodFlags = *ParserState.Aml++;
678
    AmlStart = ParserState.Aml;
679
    AmlLength = ACPI_PTR_DIFF (ParserState.PkgEnd, AmlStart);
680
 
681
    /*
682
     * Allocate resources up-front. We don't want to have to delete a new
683
     * node from the namespace if we cannot allocate memory.
684
     */
685
    AmlBuffer = ACPI_ALLOCATE (AmlLength);
686
    if (!AmlBuffer)
687
    {
688
        return (AE_NO_MEMORY);
689
    }
690
 
691
    MethodObj = AcpiUtCreateInternalObject (ACPI_TYPE_METHOD);
692
    if (!MethodObj)
693
    {
694
        ACPI_FREE (AmlBuffer);
695
        return (AE_NO_MEMORY);
696
    }
697
 
698
    /* Lock namespace for AcpiNsLookup, we may be creating a new node */
699
 
700
    Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
701
    if (ACPI_FAILURE (Status))
702
    {
703
        goto ErrorExit;
704
    }
705
 
706
    /* The lookup either returns an existing node or creates a new one */
707
 
708
    Status = AcpiNsLookup (NULL, Path, ACPI_TYPE_METHOD, ACPI_IMODE_LOAD_PASS1,
709
                ACPI_NS_DONT_OPEN_SCOPE | ACPI_NS_ERROR_IF_FOUND, NULL, &Node);
710
 
711
    (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
712
 
713
    if (ACPI_FAILURE (Status)) /* NsLookup */
714
    {
715
        if (Status != AE_ALREADY_EXISTS)
716
        {
717
            goto ErrorExit;
718
        }
719
 
720
        /* Node existed previously, make sure it is a method node */
721
 
722
        if (Node->Type != ACPI_TYPE_METHOD)
723
        {
724
            Status = AE_TYPE;
725
            goto ErrorExit;
726
        }
727
    }
728
 
729
    /* Copy the method AML to the local buffer */
730
 
731
    ACPI_MEMCPY (AmlBuffer, AmlStart, AmlLength);
732
 
733
    /* Initialize the method object with the new method's information */
734
 
735
    MethodObj->Method.AmlStart = AmlBuffer;
736
    MethodObj->Method.AmlLength = AmlLength;
737
 
738
    MethodObj->Method.ParamCount = (UINT8)
739
        (MethodFlags & AML_METHOD_ARG_COUNT);
740
 
741
    if (MethodFlags & AML_METHOD_SERIALIZED)
742
    {
2216 Serge 743
        MethodObj->Method.InfoFlags = ACPI_METHOD_SERIALIZED;
744
 
1498 serge 745
        MethodObj->Method.SyncLevel = (UINT8)
746
            ((MethodFlags & AML_METHOD_SYNC_LEVEL) >> 4);
747
    }
748
 
749
    /*
750
     * Now that it is complete, we can attach the new method object to
751
     * the method Node (detaches/deletes any existing object)
752
     */
2216 Serge 753
    Status = AcpiNsAttachObject (Node, MethodObj, ACPI_TYPE_METHOD);
1498 serge 754
 
755
    /*
756
     * Flag indicates AML buffer is dynamic, must be deleted later.
757
     * Must be set only after attach above.
758
     */
759
    Node->Flags |= ANOBJ_ALLOCATED_BUFFER;
760
 
761
    /* Remove local reference to the method object */
762
 
763
    AcpiUtRemoveReference (MethodObj);
764
    return (Status);
765
 
766
 
767
ErrorExit:
768
 
769
    ACPI_FREE (AmlBuffer);
770
    ACPI_FREE (MethodObj);
771
    return (Status);
772
}
773
 
774
ACPI_EXPORT_SYMBOL (AcpiInstallMethod)