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 "acpi.h"
48 #include "accommon.h"
49 #include "acnamesp.h"
50 #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
70 UINT8
71 AcpiRsDecodeBitmask (
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
112 UINT16
113 AcpiRsEncodeBitmask (
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
152 void
153 AcpiRsMoveData (
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
223 void
224 AcpiRsSetResourceLength (
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
279 void
280 AcpiRsSetResourceHeader (
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
312 static UINT16
313 AcpiRsStrcpy (
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
356 ACPI_RS_LENGTH
357 AcpiRsGetResourceSource (
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
445 ACPI_RSDESC_SIZE
446 AcpiRsSetResourceSource (
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
508 ACPI_STATUS
509 AcpiRsGetPrtMethodData (
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
562 ACPI_STATUS
563 AcpiRsGetCrsMethodData (
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
617 ACPI_STATUS
618 AcpiRsGetPrsMethodData (
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
673 ACPI_STATUS
674 AcpiRsGetMethodData (
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
730 ACPI_STATUS
731 AcpiRsSetSrsMethodData (
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
798 Cleanup:
799 ACPI_FREE (Info);
800 return_ACPI_STATUS (Status);
801 }
802