1/*******************************************************************************
2 *
3 * Module Name: rsutils - Utilities for the resource manager
4 *
5 ******************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2011, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions, and the following disclaimer,
16 *    without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 *    substantially similar to the "NO WARRANTY" disclaimer below
19 *    ("Disclaimer") and any redistribution must be conditioned upon
20 *    including a substantially similar Disclaimer requirement for further
21 *    binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 *    of any contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44
45#define __RSUTILS_C__
46
47#include <contrib/dev/acpica/include/acpi.h>
48#include <contrib/dev/acpica/include/accommon.h>
49#include <contrib/dev/acpica/include/acnamesp.h>
50#include <contrib/dev/acpica/include/acresrc.h>
51
52
53#define _COMPONENT          ACPI_RESOURCES
54        ACPI_MODULE_NAME    ("rsutils")
55
56
57/*******************************************************************************
58 *
59 * FUNCTION:    AcpiRsDecodeBitmask
60 *
61 * PARAMETERS:  Mask            - Bitmask to decode
62 *              List            - Where the converted list is returned
63 *
64 * RETURN:      Count of bits set (length of list)
65 *
66 * DESCRIPTION: Convert a bit mask into a list of values
67 *
68 ******************************************************************************/
69
70UINT8
71AcpiRsDecodeBitmask (
72    UINT16                  Mask,
73    UINT8                   *List)
74{
75    UINT8                   i;
76    UINT8                   BitCount;
77
78
79    ACPI_FUNCTION_ENTRY ();
80
81
82    /* Decode the mask bits */
83
84    for (i = 0, BitCount = 0; Mask; i++)
85    {
86        if (Mask & 0x0001)
87        {
88            List[BitCount] = i;
89            BitCount++;
90        }
91
92        Mask >>= 1;
93    }
94
95    return (BitCount);
96}
97
98
99/*******************************************************************************
100 *
101 * FUNCTION:    AcpiRsEncodeBitmask
102 *
103 * PARAMETERS:  List            - List of values to encode
104 *              Count           - Length of list
105 *
106 * RETURN:      Encoded bitmask
107 *
108 * DESCRIPTION: Convert a list of values to an encoded bitmask
109 *
110 ******************************************************************************/
111
112UINT16
113AcpiRsEncodeBitmask (
114    UINT8                   *List,
115    UINT8                   Count)
116{
117    UINT32                  i;
118    UINT16                  Mask;
119
120
121    ACPI_FUNCTION_ENTRY ();
122
123
124    /* Encode the list into a single bitmask */
125
126    for (i = 0, Mask = 0; i < Count; i++)
127    {
128        Mask |= (0x1 << List[i]);
129    }
130
131    return (Mask);
132}
133
134
135/*******************************************************************************
136 *
137 * FUNCTION:    AcpiRsMoveData
138 *
139 * PARAMETERS:  Destination         - Pointer to the destination descriptor
140 *              Source              - Pointer to the source descriptor
141 *              ItemCount           - How many items to move
142 *              MoveType            - Byte width
143 *
144 * RETURN:      None
145 *
146 * DESCRIPTION: Move multiple data items from one descriptor to another. Handles
147 *              alignment issues and endian issues if necessary, as configured
148 *              via the ACPI_MOVE_* macros. (This is why a memcpy is not used)
149 *
150 ******************************************************************************/
151
152void
153AcpiRsMoveData (
154    void                    *Destination,
155    void                    *Source,
156    UINT16                  ItemCount,
157    UINT8                   MoveType)
158{
159    UINT32                  i;
160
161
162    ACPI_FUNCTION_ENTRY ();
163
164
165    /* One move per item */
166
167    for (i = 0; i < ItemCount; i++)
168    {
169        switch (MoveType)
170        {
171        /*
172         * For the 8-bit case, we can perform the move all at once
173         * since there are no alignment or endian issues
174         */
175        case ACPI_RSC_MOVE8:
176            ACPI_MEMCPY (Destination, Source, ItemCount);
177            return;
178
179        /*
180         * 16-, 32-, and 64-bit cases must use the move macros that perform
181         * endian conversion and/or accomodate hardware that cannot perform
182         * misaligned memory transfers
183         */
184        case ACPI_RSC_MOVE16:
185            ACPI_MOVE_16_TO_16 (&ACPI_CAST_PTR (UINT16, Destination)[i],
186                                &ACPI_CAST_PTR (UINT16, Source)[i]);
187            break;
188
189        case ACPI_RSC_MOVE32:
190            ACPI_MOVE_32_TO_32 (&ACPI_CAST_PTR (UINT32, Destination)[i],
191                                &ACPI_CAST_PTR (UINT32, Source)[i]);
192            break;
193
194        case ACPI_RSC_MOVE64:
195            ACPI_MOVE_64_TO_64 (&ACPI_CAST_PTR (UINT64, Destination)[i],
196                                &ACPI_CAST_PTR (UINT64, Source)[i]);
197            break;
198
199        default:
200            return;
201        }
202    }
203}
204
205
206/*******************************************************************************
207 *
208 * FUNCTION:    AcpiRsSetResourceLength
209 *
210 * PARAMETERS:  TotalLength         - Length of the AML descriptor, including
211 *                                    the header and length fields.
212 *              Aml                 - Pointer to the raw AML descriptor
213 *
214 * RETURN:      None
215 *
216 * DESCRIPTION: Set the ResourceLength field of an AML
217 *              resource descriptor, both Large and Small descriptors are
218 *              supported automatically. Note: Descriptor Type field must
219 *              be valid.
220 *
221 ******************************************************************************/
222
223void
224AcpiRsSetResourceLength (
225    ACPI_RSDESC_SIZE        TotalLength,
226    AML_RESOURCE            *Aml)
227{
228    ACPI_RS_LENGTH          ResourceLength;
229
230
231    ACPI_FUNCTION_ENTRY ();
232
233
234    /* Length is the total descriptor length minus the header length */
235
236    ResourceLength = (ACPI_RS_LENGTH)
237        (TotalLength - AcpiUtGetResourceHeaderLength (Aml));
238
239    /* Length is stored differently for large and small descriptors */
240
241    if (Aml->SmallHeader.DescriptorType & ACPI_RESOURCE_NAME_LARGE)
242    {
243        /* Large descriptor -- bytes 1-2 contain the 16-bit length */
244
245        ACPI_MOVE_16_TO_16 (&Aml->LargeHeader.ResourceLength, &ResourceLength);
246    }
247    else
248    {
249        /* Small descriptor -- bits 2:0 of byte 0 contain the length */
250
251        Aml->SmallHeader.DescriptorType = (UINT8)
252
253            /* Clear any existing length, preserving descriptor type bits */
254
255            ((Aml->SmallHeader.DescriptorType & ~ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK)
256
257            | ResourceLength);
258    }
259}
260
261
262/*******************************************************************************
263 *
264 * FUNCTION:    AcpiRsSetResourceHeader
265 *
266 * PARAMETERS:  DescriptorType      - Byte to be inserted as the type
267 *              TotalLength         - Length of the AML descriptor, including
268 *                                    the header and length fields.
269 *              Aml                 - Pointer to the raw AML descriptor
270 *
271 * RETURN:      None
272 *
273 * DESCRIPTION: Set the DescriptorType and ResourceLength fields of an AML
274 *              resource descriptor, both Large and Small descriptors are
275 *              supported automatically
276 *
277 ******************************************************************************/
278
279void
280AcpiRsSetResourceHeader (
281    UINT8                   DescriptorType,
282    ACPI_RSDESC_SIZE        TotalLength,
283    AML_RESOURCE            *Aml)
284{
285    ACPI_FUNCTION_ENTRY ();
286
287
288    /* Set the Resource Type */
289
290    Aml->SmallHeader.DescriptorType = DescriptorType;
291
292    /* Set the Resource Length */
293
294    AcpiRsSetResourceLength (TotalLength, Aml);
295}
296
297
298/*******************************************************************************
299 *
300 * FUNCTION:    AcpiRsStrcpy
301 *
302 * PARAMETERS:  Destination         - Pointer to the destination string
303 *              Source              - Pointer to the source string
304 *
305 * RETURN:      String length, including NULL terminator
306 *
307 * DESCRIPTION: Local string copy that returns the string length, saving a
308 *              strcpy followed by a strlen.
309 *
310 ******************************************************************************/
311
312static UINT16
313AcpiRsStrcpy (
314    char                    *Destination,
315    char                    *Source)
316{
317    UINT16                  i;
318
319
320    ACPI_FUNCTION_ENTRY ();
321
322
323    for (i = 0; Source[i]; i++)
324    {
325        Destination[i] = Source[i];
326    }
327
328    Destination[i] = 0;
329
330    /* Return string length including the NULL terminator */
331
332    return ((UINT16) (i + 1));
333}
334
335
336/*******************************************************************************
337 *
338 * FUNCTION:    AcpiRsGetResourceSource
339 *
340 * PARAMETERS:  ResourceLength      - Length field of the descriptor
341 *              MinimumLength       - Minimum length of the descriptor (minus
342 *                                    any optional fields)
343 *              ResourceSource      - Where the ResourceSource is returned
344 *              Aml                 - Pointer to the raw AML descriptor
345 *              StringPtr           - (optional) where to store the actual
346 *                                    ResourceSource string
347 *
348 * RETURN:      Length of the string plus NULL terminator, rounded up to native
349 *              word boundary
350 *
351 * DESCRIPTION: Copy the optional ResourceSource data from a raw AML descriptor
352 *              to an internal resource descriptor
353 *
354 ******************************************************************************/
355
356ACPI_RS_LENGTH
357AcpiRsGetResourceSource (
358    ACPI_RS_LENGTH          ResourceLength,
359    ACPI_RS_LENGTH          MinimumLength,
360    ACPI_RESOURCE_SOURCE    *ResourceSource,
361    AML_RESOURCE            *Aml,
362    char                    *StringPtr)
363{
364    ACPI_RSDESC_SIZE        TotalLength;
365    UINT8                   *AmlResourceSource;
366
367
368    ACPI_FUNCTION_ENTRY ();
369
370
371    TotalLength = ResourceLength + sizeof (AML_RESOURCE_LARGE_HEADER);
372    AmlResourceSource = ACPI_ADD_PTR (UINT8, Aml, MinimumLength);
373
374    /*
375     * ResourceSource is present if the length of the descriptor is longer than
376     * the minimum length.
377     *
378     * Note: Some resource descriptors will have an additional null, so
379     * we add 1 to the minimum length.
380     */
381    if (TotalLength > (ACPI_RSDESC_SIZE) (MinimumLength + 1))
382    {
383        /* Get the ResourceSourceIndex */
384
385        ResourceSource->Index = AmlResourceSource[0];
386
387        ResourceSource->StringPtr = StringPtr;
388        if (!StringPtr)
389        {
390            /*
391             * String destination pointer is not specified; Set the String
392             * pointer to the end of the current ResourceSource structure.
393             */
394            ResourceSource->StringPtr = ACPI_ADD_PTR (char, ResourceSource,
395                sizeof (ACPI_RESOURCE_SOURCE));
396        }
397
398        /*
399         * In order for the Resource length to be a multiple of the native
400         * word, calculate the length of the string (+1 for NULL terminator)
401         * and expand to the next word multiple.
402         *
403         * Zero the entire area of the buffer.
404         */
405        TotalLength = (UINT32) ACPI_STRLEN (
406            ACPI_CAST_PTR (char, &AmlResourceSource[1])) + 1;
407        TotalLength = (UINT32) ACPI_ROUND_UP_TO_NATIVE_WORD (TotalLength);
408
409        ACPI_MEMSET (ResourceSource->StringPtr, 0, TotalLength);
410
411        /* Copy the ResourceSource string to the destination */
412
413        ResourceSource->StringLength = AcpiRsStrcpy (ResourceSource->StringPtr,
414            ACPI_CAST_PTR (char, &AmlResourceSource[1]));
415
416        return ((ACPI_RS_LENGTH) TotalLength);
417    }
418
419    /* ResourceSource is not present */
420
421    ResourceSource->Index = 0;
422    ResourceSource->StringLength = 0;
423    ResourceSource->StringPtr = NULL;
424    return (0);
425}
426
427
428/*******************************************************************************
429 *
430 * FUNCTION:    AcpiRsSetResourceSource
431 *
432 * PARAMETERS:  Aml                 - Pointer to the raw AML descriptor
433 *              MinimumLength       - Minimum length of the descriptor (minus
434 *                                    any optional fields)
435 *              ResourceSource      - Internal ResourceSource
436
437 *
438 * RETURN:      Total length of the AML descriptor
439 *
440 * DESCRIPTION: Convert an optional ResourceSource from internal format to a
441 *              raw AML resource descriptor
442 *
443 ******************************************************************************/
444
445ACPI_RSDESC_SIZE
446AcpiRsSetResourceSource (
447    AML_RESOURCE            *Aml,
448    ACPI_RS_LENGTH          MinimumLength,
449    ACPI_RESOURCE_SOURCE    *ResourceSource)
450{
451    UINT8                   *AmlResourceSource;
452    ACPI_RSDESC_SIZE        DescriptorLength;
453
454
455    ACPI_FUNCTION_ENTRY ();
456
457
458    DescriptorLength = MinimumLength;
459
460    /* Non-zero string length indicates presence of a ResourceSource */
461
462    if (ResourceSource->StringLength)
463    {
464        /* Point to the end of the AML descriptor */
465
466        AmlResourceSource = ACPI_ADD_PTR (UINT8, Aml, MinimumLength);
467
468        /* Copy the ResourceSourceIndex */
469
470        AmlResourceSource[0] = (UINT8) ResourceSource->Index;
471
472        /* Copy the ResourceSource string */
473
474        ACPI_STRCPY (ACPI_CAST_PTR (char, &AmlResourceSource[1]),
475            ResourceSource->StringPtr);
476
477        /*
478         * Add the length of the string (+ 1 for null terminator) to the
479         * final descriptor length
480         */
481        DescriptorLength += ((ACPI_RSDESC_SIZE) ResourceSource->StringLength + 1);
482    }
483
484    /* Return the new total length of the AML descriptor */
485
486    return (DescriptorLength);
487}
488
489
490/*******************************************************************************
491 *
492 * FUNCTION:    AcpiRsGetPrtMethodData
493 *
494 * PARAMETERS:  Node            - Device node
495 *              RetBuffer       - Pointer to a buffer structure for the
496 *                                results
497 *
498 * RETURN:      Status
499 *
500 * DESCRIPTION: This function is called to get the _PRT value of an object
501 *              contained in an object specified by the handle passed in
502 *
503 *              If the function fails an appropriate status will be returned
504 *              and the contents of the callers buffer is undefined.
505 *
506 ******************************************************************************/
507
508ACPI_STATUS
509AcpiRsGetPrtMethodData (
510    ACPI_NAMESPACE_NODE     *Node,
511    ACPI_BUFFER             *RetBuffer)
512{
513    ACPI_OPERAND_OBJECT     *ObjDesc;
514    ACPI_STATUS             Status;
515
516
517    ACPI_FUNCTION_TRACE (RsGetPrtMethodData);
518
519
520    /* Parameters guaranteed valid by caller */
521
522    /* Execute the method, no parameters */
523
524    Status = AcpiUtEvaluateObject (Node, METHOD_NAME__PRT,
525                ACPI_BTYPE_PACKAGE, &ObjDesc);
526    if (ACPI_FAILURE (Status))
527    {
528        return_ACPI_STATUS (Status);
529    }
530
531    /*
532     * Create a resource linked list from the byte stream buffer that comes
533     * back from the _CRS method execution.
534     */
535    Status = AcpiRsCreatePciRoutingTable (ObjDesc, RetBuffer);
536
537    /* On exit, we must delete the object returned by EvaluateObject */
538
539    AcpiUtRemoveReference (ObjDesc);
540    return_ACPI_STATUS (Status);
541}
542
543
544/*******************************************************************************
545 *
546 * FUNCTION:    AcpiRsGetCrsMethodData
547 *
548 * PARAMETERS:  Node            - Device node
549 *              RetBuffer       - Pointer to a buffer structure for the
550 *                                results
551 *
552 * RETURN:      Status
553 *
554 * DESCRIPTION: This function is called to get the _CRS value of an object
555 *              contained in an object specified by the handle passed in
556 *
557 *              If the function fails an appropriate status will be returned
558 *              and the contents of the callers buffer is undefined.
559 *
560 ******************************************************************************/
561
562ACPI_STATUS
563AcpiRsGetCrsMethodData (
564    ACPI_NAMESPACE_NODE     *Node,
565    ACPI_BUFFER             *RetBuffer)
566{
567    ACPI_OPERAND_OBJECT     *ObjDesc;
568    ACPI_STATUS             Status;
569
570
571    ACPI_FUNCTION_TRACE (RsGetCrsMethodData);
572
573
574    /* Parameters guaranteed valid by caller */
575
576    /* Execute the method, no parameters */
577
578    Status = AcpiUtEvaluateObject (Node, METHOD_NAME__CRS,
579                ACPI_BTYPE_BUFFER, &ObjDesc);
580    if (ACPI_FAILURE (Status))
581    {
582        return_ACPI_STATUS (Status);
583    }
584
585    /*
586     * Make the call to create a resource linked list from the
587     * byte stream buffer that comes back from the _CRS method
588     * execution.
589     */
590    Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
591
592    /* On exit, we must delete the object returned by evaluateObject */
593
594    AcpiUtRemoveReference (ObjDesc);
595    return_ACPI_STATUS (Status);
596}
597
598
599/*******************************************************************************
600 *
601 * FUNCTION:    AcpiRsGetPrsMethodData
602 *
603 * PARAMETERS:  Node            - Device node
604 *              RetBuffer       - Pointer to a buffer structure for the
605 *                                results
606 *
607 * RETURN:      Status
608 *
609 * DESCRIPTION: This function is called to get the _PRS value of an object
610 *              contained in an object specified by the handle passed in
611 *
612 *              If the function fails an appropriate status will be returned
613 *              and the contents of the callers buffer is undefined.
614 *
615 ******************************************************************************/
616
617ACPI_STATUS
618AcpiRsGetPrsMethodData (
619    ACPI_NAMESPACE_NODE     *Node,
620    ACPI_BUFFER             *RetBuffer)
621{
622    ACPI_OPERAND_OBJECT     *ObjDesc;
623    ACPI_STATUS             Status;
624
625
626    ACPI_FUNCTION_TRACE (RsGetPrsMethodData);
627
628
629    /* Parameters guaranteed valid by caller */
630
631    /* Execute the method, no parameters */
632
633    Status = AcpiUtEvaluateObject (Node, METHOD_NAME__PRS,
634                ACPI_BTYPE_BUFFER, &ObjDesc);
635    if (ACPI_FAILURE (Status))
636    {
637        return_ACPI_STATUS (Status);
638    }
639
640    /*
641     * Make the call to create a resource linked list from the
642     * byte stream buffer that comes back from the _CRS method
643     * execution.
644     */
645    Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
646
647    /* On exit, we must delete the object returned by evaluateObject */
648
649    AcpiUtRemoveReference (ObjDesc);
650    return_ACPI_STATUS (Status);
651}
652
653
654/*******************************************************************************
655 *
656 * FUNCTION:    AcpiRsGetMethodData
657 *
658 * PARAMETERS:  Handle          - Handle to the containing object
659 *              Path            - Path to method, relative to Handle
660 *              RetBuffer       - Pointer to a buffer structure for the
661 *                                results
662 *
663 * RETURN:      Status
664 *
665 * DESCRIPTION: This function is called to get the _CRS or _PRS value of an
666 *              object contained in an object specified by the handle passed in
667 *
668 *              If the function fails an appropriate status will be returned
669 *              and the contents of the callers buffer is undefined.
670 *
671 ******************************************************************************/
672
673ACPI_STATUS
674AcpiRsGetMethodData (
675    ACPI_HANDLE             Handle,
676    char                    *Path,
677    ACPI_BUFFER             *RetBuffer)
678{
679    ACPI_OPERAND_OBJECT     *ObjDesc;
680    ACPI_STATUS             Status;
681
682
683    ACPI_FUNCTION_TRACE (RsGetMethodData);
684
685
686    /* Parameters guaranteed valid by caller */
687
688    /* Execute the method, no parameters */
689
690    Status = AcpiUtEvaluateObject (Handle, Path, ACPI_BTYPE_BUFFER, &ObjDesc);
691    if (ACPI_FAILURE (Status))
692    {
693        return_ACPI_STATUS (Status);
694    }
695
696    /*
697     * Make the call to create a resource linked list from the
698     * byte stream buffer that comes back from the method
699     * execution.
700     */
701    Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
702
703    /* On exit, we must delete the object returned by EvaluateObject */
704
705    AcpiUtRemoveReference (ObjDesc);
706    return_ACPI_STATUS (Status);
707}
708
709
710/*******************************************************************************
711 *
712 * FUNCTION:    AcpiRsSetSrsMethodData
713 *
714 * PARAMETERS:  Node            - Device node
715 *              InBuffer        - Pointer to a buffer structure of the
716 *                                parameter
717 *
718 * RETURN:      Status
719 *
720 * DESCRIPTION: This function is called to set the _SRS of an object contained
721 *              in an object specified by the handle passed in
722 *
723 *              If the function fails an appropriate status will be returned
724 *              and the contents of the callers buffer is undefined.
725 *
726 * Note: Parameters guaranteed valid by caller
727 *
728 ******************************************************************************/
729
730ACPI_STATUS
731AcpiRsSetSrsMethodData (
732    ACPI_NAMESPACE_NODE     *Node,
733    ACPI_BUFFER             *InBuffer)
734{
735    ACPI_EVALUATE_INFO      *Info;
736    ACPI_OPERAND_OBJECT     *Args[2];
737    ACPI_STATUS             Status;
738    ACPI_BUFFER             Buffer;
739
740
741    ACPI_FUNCTION_TRACE (RsSetSrsMethodData);
742
743
744    /* Allocate and initialize the evaluation information block */
745
746    Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
747    if (!Info)
748    {
749        return_ACPI_STATUS (AE_NO_MEMORY);
750    }
751
752    Info->PrefixNode = Node;
753    Info->Pathname = METHOD_NAME__SRS;
754    Info->Parameters = Args;
755    Info->Flags = ACPI_IGNORE_RETURN_VALUE;
756
757    /*
758     * The InBuffer parameter will point to a linked list of
759     * resource parameters. It needs to be formatted into a
760     * byte stream to be sent in as an input parameter to _SRS
761     *
762     * Convert the linked list into a byte stream
763     */
764    Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER;
765    Status = AcpiRsCreateAmlResources (InBuffer->Pointer, &Buffer);
766    if (ACPI_FAILURE (Status))
767    {
768        goto Cleanup;
769    }
770
771    /* Create and initialize the method parameter object */
772
773    Args[0] = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER);
774    if (!Args[0])
775    {
776        /*
777         * Must free the buffer allocated above (otherwise it is freed
778         * later)
779         */
780        ACPI_FREE (Buffer.Pointer);
781        Status = AE_NO_MEMORY;
782        goto Cleanup;
783    }
784
785    Args[0]->Buffer.Length  = (UINT32) Buffer.Length;
786    Args[0]->Buffer.Pointer = Buffer.Pointer;
787    Args[0]->Common.Flags   = AOPOBJ_DATA_VALID;
788    Args[1] = NULL;
789
790    /* Execute the method, no return value is expected */
791
792    Status = AcpiNsEvaluate (Info);
793
794    /* Clean up and return the status from AcpiNsEvaluate */
795
796    AcpiUtRemoveReference (Args[0]);
797
798Cleanup:
799    ACPI_FREE (Info);
800    return_ACPI_STATUS (Status);
801}
802
803