1 /*******************************************************************************
2 *
3 * Module Name: rsutils - Utilities for the resource manager
4 *
5 ******************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2014, 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 case ACPI_RSC_MOVE_GPIO_RES:
177 case ACPI_RSC_MOVE_SERIAL_VEN:
178 case ACPI_RSC_MOVE_SERIAL_RES:
179
180 ACPI_MEMCPY (Destination, Source, ItemCount);
181 return;
182
183 /*
184 * 16-, 32-, and 64-bit cases must use the move macros that perform
185 * endian conversion and/or accommodate hardware that cannot perform
186 * misaligned memory transfers
187 */
188 case ACPI_RSC_MOVE16:
189 case ACPI_RSC_MOVE_GPIO_PIN:
190
191 ACPI_MOVE_16_TO_16 (&ACPI_CAST_PTR (UINT16, Destination)[i],
192 &ACPI_CAST_PTR (UINT16, Source)[i]);
193 break;
194
195 case ACPI_RSC_MOVE32:
196
197 ACPI_MOVE_32_TO_32 (&ACPI_CAST_PTR (UINT32, Destination)[i],
198 &ACPI_CAST_PTR (UINT32, Source)[i]);
199 break;
200
201 case ACPI_RSC_MOVE64:
202
203 ACPI_MOVE_64_TO_64 (&ACPI_CAST_PTR (UINT64, Destination)[i],
204 &ACPI_CAST_PTR (UINT64, Source)[i]);
205 break;
206
207 default:
208
209 return;
210 }
211 }
212 }
213
214
215 /*******************************************************************************
216 *
217 * FUNCTION: AcpiRsSetResourceLength
218 *
219 * PARAMETERS: TotalLength - Length of the AML descriptor, including
220 * the header and length fields.
221 * Aml - Pointer to the raw AML descriptor
222 *
223 * RETURN: None
224 *
225 * DESCRIPTION: Set the ResourceLength field of an AML
226 * resource descriptor, both Large and Small descriptors are
227 * supported automatically. Note: Descriptor Type field must
228 * be valid.
229 *
230 ******************************************************************************/
231
232 void
233 AcpiRsSetResourceLength (
234 ACPI_RSDESC_SIZE TotalLength,
235 AML_RESOURCE *Aml)
236 {
237 ACPI_RS_LENGTH ResourceLength;
238
239
240 ACPI_FUNCTION_ENTRY ();
241
242
243 /* Length is the total descriptor length minus the header length */
244
245 ResourceLength = (ACPI_RS_LENGTH)
246 (TotalLength - AcpiUtGetResourceHeaderLength (Aml));
247
248 /* Length is stored differently for large and small descriptors */
249
250 if (Aml->SmallHeader.DescriptorType & ACPI_RESOURCE_NAME_LARGE)
251 {
252 /* Large descriptor -- bytes 1-2 contain the 16-bit length */
253
254 ACPI_MOVE_16_TO_16 (&Aml->LargeHeader.ResourceLength, &ResourceLength);
255 }
256 else
257 {
258 /* Small descriptor -- bits 2:0 of byte 0 contain the length */
259
260 Aml->SmallHeader.DescriptorType = (UINT8)
261
262 /* Clear any existing length, preserving descriptor type bits */
263
264 ((Aml->SmallHeader.DescriptorType & ~ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK)
265
266 | ResourceLength);
267 }
268 }
269
270
271 /*******************************************************************************
272 *
273 * FUNCTION: AcpiRsSetResourceHeader
274 *
275 * PARAMETERS: DescriptorType - Byte to be inserted as the type
276 * TotalLength - Length of the AML descriptor, including
277 * the header and length fields.
278 * Aml - Pointer to the raw AML descriptor
279 *
280 * RETURN: None
281 *
282 * DESCRIPTION: Set the DescriptorType and ResourceLength fields of an AML
283 * resource descriptor, both Large and Small descriptors are
284 * supported automatically
285 *
286 ******************************************************************************/
287
288 void
289 AcpiRsSetResourceHeader (
290 UINT8 DescriptorType,
291 ACPI_RSDESC_SIZE TotalLength,
292 AML_RESOURCE *Aml)
293 {
294 ACPI_FUNCTION_ENTRY ();
295
296
297 /* Set the Resource Type */
298
299 Aml->SmallHeader.DescriptorType = DescriptorType;
300
301 /* Set the Resource Length */
302
303 AcpiRsSetResourceLength (TotalLength, Aml);
304 }
305
306
307 /*******************************************************************************
308 *
309 * FUNCTION: AcpiRsStrcpy
310 *
311 * PARAMETERS: Destination - Pointer to the destination string
312 * Source - Pointer to the source string
313 *
314 * RETURN: String length, including NULL terminator
315 *
316 * DESCRIPTION: Local string copy that returns the string length, saving a
317 * strcpy followed by a strlen.
318 *
319 ******************************************************************************/
320
321 static UINT16
322 AcpiRsStrcpy (
323 char *Destination,
324 char *Source)
325 {
326 UINT16 i;
327
328
329 ACPI_FUNCTION_ENTRY ();
330
331
332 for (i = 0; Source[i]; i++)
333 {
334 Destination[i] = Source[i];
335 }
336
337 Destination[i] = 0;
338
339 /* Return string length including the NULL terminator */
340
341 return ((UINT16) (i + 1));
342 }
343
344
345 /*******************************************************************************
346 *
347 * FUNCTION: AcpiRsGetResourceSource
348 *
349 * PARAMETERS: ResourceLength - Length field of the descriptor
350 * MinimumLength - Minimum length of the descriptor (minus
351 * any optional fields)
352 * ResourceSource - Where the ResourceSource is returned
353 * Aml - Pointer to the raw AML descriptor
354 * StringPtr - (optional) where to store the actual
355 * ResourceSource string
356 *
357 * RETURN: Length of the string plus NULL terminator, rounded up to native
358 * word boundary
359 *
360 * DESCRIPTION: Copy the optional ResourceSource data from a raw AML descriptor
361 * to an internal resource descriptor
362 *
363 ******************************************************************************/
364
365 ACPI_RS_LENGTH
366 AcpiRsGetResourceSource (
367 ACPI_RS_LENGTH ResourceLength,
368 ACPI_RS_LENGTH MinimumLength,
369 ACPI_RESOURCE_SOURCE *ResourceSource,
370 AML_RESOURCE *Aml,
371 char *StringPtr)
372 {
373 ACPI_RSDESC_SIZE TotalLength;
374 UINT8 *AmlResourceSource;
375
376
377 ACPI_FUNCTION_ENTRY ();
378
379
380 TotalLength = ResourceLength + sizeof (AML_RESOURCE_LARGE_HEADER);
381 AmlResourceSource = ACPI_ADD_PTR (UINT8, Aml, MinimumLength);
382
383 /*
384 * ResourceSource is present if the length of the descriptor is longer than
385 * the minimum length.
386 *
387 * Note: Some resource descriptors will have an additional null, so
388 * we add 1 to the minimum length.
389 */
390 if (TotalLength > (ACPI_RSDESC_SIZE) (MinimumLength + 1))
391 {
392 /* Get the ResourceSourceIndex */
393
394 ResourceSource->Index = AmlResourceSource[0];
395
396 ResourceSource->StringPtr = StringPtr;
397 if (!StringPtr)
398 {
399 /*
400 * String destination pointer is not specified; Set the String
401 * pointer to the end of the current ResourceSource structure.
402 */
403 ResourceSource->StringPtr = ACPI_ADD_PTR (char, ResourceSource,
404 sizeof (ACPI_RESOURCE_SOURCE));
405 }
406
407 /*
408 * In order for the Resource length to be a multiple of the native
409 * word, calculate the length of the string (+1 for NULL terminator)
410 * and expand to the next word multiple.
411 *
412 * Zero the entire area of the buffer.
413 */
414 TotalLength = (UINT32) ACPI_STRLEN (
415 ACPI_CAST_PTR (char, &AmlResourceSource[1])) + 1;
416 TotalLength = (UINT32) ACPI_ROUND_UP_TO_NATIVE_WORD (TotalLength);
417
418 ACPI_MEMSET (ResourceSource->StringPtr, 0, TotalLength);
419
420 /* Copy the ResourceSource string to the destination */
421
422 ResourceSource->StringLength = AcpiRsStrcpy (ResourceSource->StringPtr,
423 ACPI_CAST_PTR (char, &AmlResourceSource[1]));
424
425 return ((ACPI_RS_LENGTH) TotalLength);
426 }
427
428 /* ResourceSource is not present */
429
430 ResourceSource->Index = 0;
431 ResourceSource->StringLength = 0;
432 ResourceSource->StringPtr = NULL;
433 return (0);
434 }
435
436
437 /*******************************************************************************
438 *
439 * FUNCTION: AcpiRsSetResourceSource
440 *
441 * PARAMETERS: Aml - Pointer to the raw AML descriptor
442 * MinimumLength - Minimum length of the descriptor (minus
443 * any optional fields)
444 * ResourceSource - Internal ResourceSource
445
446 *
447 * RETURN: Total length of the AML descriptor
448 *
449 * DESCRIPTION: Convert an optional ResourceSource from internal format to a
450 * raw AML resource descriptor
451 *
452 ******************************************************************************/
453
454 ACPI_RSDESC_SIZE
455 AcpiRsSetResourceSource (
456 AML_RESOURCE *Aml,
457 ACPI_RS_LENGTH MinimumLength,
458 ACPI_RESOURCE_SOURCE *ResourceSource)
459 {
460 UINT8 *AmlResourceSource;
461 ACPI_RSDESC_SIZE DescriptorLength;
462
463
464 ACPI_FUNCTION_ENTRY ();
465
466
467 DescriptorLength = MinimumLength;
468
469 /* Non-zero string length indicates presence of a ResourceSource */
470
471 if (ResourceSource->StringLength)
472 {
473 /* Point to the end of the AML descriptor */
474
475 AmlResourceSource = ACPI_ADD_PTR (UINT8, Aml, MinimumLength);
476
477 /* Copy the ResourceSourceIndex */
478
479 AmlResourceSource[0] = (UINT8) ResourceSource->Index;
480
481 /* Copy the ResourceSource string */
482
483 ACPI_STRCPY (ACPI_CAST_PTR (char, &AmlResourceSource[1]),
484 ResourceSource->StringPtr);
485
486 /*
487 * Add the length of the string (+ 1 for null terminator) to the
488 * final descriptor length
489 */
490 DescriptorLength += ((ACPI_RSDESC_SIZE) ResourceSource->StringLength + 1);
491 }
492
493 /* Return the new total length of the AML descriptor */
494
495 return (DescriptorLength);
496 }
497
498
499 /*******************************************************************************
500 *
501 * FUNCTION: AcpiRsGetPrtMethodData
502 *
503 * PARAMETERS: Node - Device node
504 * RetBuffer - Pointer to a buffer structure for the
505 * results
506 *
507 * RETURN: Status
508 *
509 * DESCRIPTION: This function is called to get the _PRT value of an object
510 * contained in an object specified by the handle passed in
511 *
512 * If the function fails an appropriate status will be returned
513 * and the contents of the callers buffer is undefined.
514 *
515 ******************************************************************************/
516
517 ACPI_STATUS
518 AcpiRsGetPrtMethodData (
519 ACPI_NAMESPACE_NODE *Node,
520 ACPI_BUFFER *RetBuffer)
521 {
522 ACPI_OPERAND_OBJECT *ObjDesc;
523 ACPI_STATUS Status;
524
525
526 ACPI_FUNCTION_TRACE (RsGetPrtMethodData);
527
528
529 /* Parameters guaranteed valid by caller */
530
531 /* Execute the method, no parameters */
532
533 Status = AcpiUtEvaluateObject (Node, METHOD_NAME__PRT,
534 ACPI_BTYPE_PACKAGE, &ObjDesc);
535 if (ACPI_FAILURE (Status))
536 {
537 return_ACPI_STATUS (Status);
538 }
539
540 /*
541 * Create a resource linked list from the byte stream buffer that comes
542 * back from the _CRS method execution.
543 */
544 Status = AcpiRsCreatePciRoutingTable (ObjDesc, RetBuffer);
545
546 /* On exit, we must delete the object returned by EvaluateObject */
547
548 AcpiUtRemoveReference (ObjDesc);
549 return_ACPI_STATUS (Status);
550 }
551
552
553 /*******************************************************************************
554 *
555 * FUNCTION: AcpiRsGetCrsMethodData
556 *
557 * PARAMETERS: Node - Device node
558 * RetBuffer - Pointer to a buffer structure for the
559 * results
560 *
561 * RETURN: Status
562 *
563 * DESCRIPTION: This function is called to get the _CRS value of an object
564 * contained in an object specified by the handle passed in
565 *
566 * If the function fails an appropriate status will be returned
567 * and the contents of the callers buffer is undefined.
568 *
569 ******************************************************************************/
570
571 ACPI_STATUS
572 AcpiRsGetCrsMethodData (
573 ACPI_NAMESPACE_NODE *Node,
574 ACPI_BUFFER *RetBuffer)
575 {
576 ACPI_OPERAND_OBJECT *ObjDesc;
577 ACPI_STATUS Status;
578
579
580 ACPI_FUNCTION_TRACE (RsGetCrsMethodData);
581
582
583 /* Parameters guaranteed valid by caller */
584
585 /* Execute the method, no parameters */
586
587 Status = AcpiUtEvaluateObject (Node, METHOD_NAME__CRS,
588 ACPI_BTYPE_BUFFER, &ObjDesc);
589 if (ACPI_FAILURE (Status))
590 {
591 return_ACPI_STATUS (Status);
592 }
593
594 /*
595 * Make the call to create a resource linked list from the
596 * byte stream buffer that comes back from the _CRS method
597 * execution.
598 */
599 Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
600
601 /* On exit, we must delete the object returned by evaluateObject */
602
603 AcpiUtRemoveReference (ObjDesc);
604 return_ACPI_STATUS (Status);
605 }
606
607
608 /*******************************************************************************
609 *
610 * FUNCTION: AcpiRsGetPrsMethodData
611 *
612 * PARAMETERS: Node - Device node
613 * RetBuffer - Pointer to a buffer structure for the
614 * results
615 *
616 * RETURN: Status
617 *
618 * DESCRIPTION: This function is called to get the _PRS value of an object
619 * contained in an object specified by the handle passed in
620 *
621 * If the function fails an appropriate status will be returned
622 * and the contents of the callers buffer is undefined.
623 *
624 ******************************************************************************/
625
626 ACPI_STATUS
627 AcpiRsGetPrsMethodData (
628 ACPI_NAMESPACE_NODE *Node,
629 ACPI_BUFFER *RetBuffer)
630 {
631 ACPI_OPERAND_OBJECT *ObjDesc;
632 ACPI_STATUS Status;
633
634
635 ACPI_FUNCTION_TRACE (RsGetPrsMethodData);
636
637
638 /* Parameters guaranteed valid by caller */
639
640 /* Execute the method, no parameters */
641
642 Status = AcpiUtEvaluateObject (Node, METHOD_NAME__PRS,
643 ACPI_BTYPE_BUFFER, &ObjDesc);
644 if (ACPI_FAILURE (Status))
645 {
646 return_ACPI_STATUS (Status);
647 }
648
649 /*
650 * Make the call to create a resource linked list from the
651 * byte stream buffer that comes back from the _CRS method
652 * execution.
653 */
654 Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
655
656 /* On exit, we must delete the object returned by evaluateObject */
657
658 AcpiUtRemoveReference (ObjDesc);
659 return_ACPI_STATUS (Status);
660 }
661
662
663 /*******************************************************************************
664 *
665 * FUNCTION: AcpiRsGetAeiMethodData
666 *
667 * PARAMETERS: Node - Device node
668 * RetBuffer - Pointer to a buffer structure for the
669 * results
670 *
671 * RETURN: Status
672 *
673 * DESCRIPTION: This function is called to get the _AEI value of an object
674 * contained in an object specified by the handle passed in
675 *
676 * If the function fails an appropriate status will be returned
677 * and the contents of the callers buffer is undefined.
678 *
679 ******************************************************************************/
680
681 ACPI_STATUS
682 AcpiRsGetAeiMethodData (
683 ACPI_NAMESPACE_NODE *Node,
684 ACPI_BUFFER *RetBuffer)
685 {
686 ACPI_OPERAND_OBJECT *ObjDesc;
687 ACPI_STATUS Status;
688
689
690 ACPI_FUNCTION_TRACE (RsGetAeiMethodData);
691
692
693 /* Parameters guaranteed valid by caller */
694
695 /* Execute the method, no parameters */
696
697 Status = AcpiUtEvaluateObject (Node, METHOD_NAME__AEI,
698 ACPI_BTYPE_BUFFER, &ObjDesc);
699 if (ACPI_FAILURE (Status))
700 {
701 return_ACPI_STATUS (Status);
702 }
703
704 /*
705 * Make the call to create a resource linked list from the
706 * byte stream buffer that comes back from the _CRS method
707 * execution.
708 */
709 Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
710
711 /* On exit, we must delete the object returned by evaluateObject */
712
713 AcpiUtRemoveReference (ObjDesc);
714 return_ACPI_STATUS (Status);
715 }
716
717
718 /*******************************************************************************
719 *
720 * FUNCTION: AcpiRsGetMethodData
721 *
722 * PARAMETERS: Handle - Handle to the containing object
723 * Path - Path to method, relative to Handle
724 * RetBuffer - Pointer to a buffer structure for the
725 * results
726 *
727 * RETURN: Status
728 *
729 * DESCRIPTION: This function is called to get the _CRS or _PRS value of an
730 * object contained in an object specified by the handle passed in
731 *
732 * If the function fails an appropriate status will be returned
733 * and the contents of the callers buffer is undefined.
734 *
735 ******************************************************************************/
736
737 ACPI_STATUS
738 AcpiRsGetMethodData (
739 ACPI_HANDLE Handle,
740 char *Path,
741 ACPI_BUFFER *RetBuffer)
742 {
743 ACPI_OPERAND_OBJECT *ObjDesc;
744 ACPI_STATUS Status;
745
746
747 ACPI_FUNCTION_TRACE (RsGetMethodData);
748
749
750 /* Parameters guaranteed valid by caller */
751
752 /* Execute the method, no parameters */
753
754 Status = AcpiUtEvaluateObject (ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Handle),
755 Path, ACPI_BTYPE_BUFFER, &ObjDesc);
756 if (ACPI_FAILURE (Status))
757 {
758 return_ACPI_STATUS (Status);
759 }
760
761 /*
762 * Make the call to create a resource linked list from the
763 * byte stream buffer that comes back from the method
764 * execution.
765 */
766 Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
767
768 /* On exit, we must delete the object returned by EvaluateObject */
769
770 AcpiUtRemoveReference (ObjDesc);
771 return_ACPI_STATUS (Status);
772 }
773
774
775 /*******************************************************************************
776 *
777 * FUNCTION: AcpiRsSetSrsMethodData
778 *
779 * PARAMETERS: Node - Device node
780 * InBuffer - Pointer to a buffer structure of the
781 * parameter
782 *
783 * RETURN: Status
784 *
785 * DESCRIPTION: This function is called to set the _SRS of an object contained
786 * in an object specified by the handle passed in
787 *
788 * If the function fails an appropriate status will be returned
789 * and the contents of the callers buffer is undefined.
790 *
791 * Note: Parameters guaranteed valid by caller
792 *
793 ******************************************************************************/
794
795 ACPI_STATUS
796 AcpiRsSetSrsMethodData (
797 ACPI_NAMESPACE_NODE *Node,
798 ACPI_BUFFER *InBuffer)
799 {
800 ACPI_EVALUATE_INFO *Info;
801 ACPI_OPERAND_OBJECT *Args[2];
802 ACPI_STATUS Status;
803 ACPI_BUFFER Buffer;
804
805
806 ACPI_FUNCTION_TRACE (RsSetSrsMethodData);
807
808
809 /* Allocate and initialize the evaluation information block */
810
811 Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
812 if (!Info)
813 {
814 return_ACPI_STATUS (AE_NO_MEMORY);
815 }
816
817 Info->PrefixNode = Node;
818 Info->RelativePathname = METHOD_NAME__SRS;
819 Info->Parameters = Args;
820 Info->Flags = ACPI_IGNORE_RETURN_VALUE;
821
822 /*
823 * The InBuffer parameter will point to a linked list of
824 * resource parameters. It needs to be formatted into a
825 * byte stream to be sent in as an input parameter to _SRS
826 *
827 * Convert the linked list into a byte stream
828 */
829 Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER;
830 Status = AcpiRsCreateAmlResources (InBuffer, &Buffer);
831 if (ACPI_FAILURE (Status))
832 {
833 goto Cleanup;
834 }
835
836 /* Create and initialize the method parameter object */
837
838 Args[0] = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER);
839 if (!Args[0])
840 {
841 /*
842 * Must free the buffer allocated above (otherwise it is freed
843 * later)
844 */
845 ACPI_FREE (Buffer.Pointer);
846 Status = AE_NO_MEMORY;
847 goto Cleanup;
848 }
849
850 Args[0]->Buffer.Length = (UINT32) Buffer.Length;
851 Args[0]->Buffer.Pointer = Buffer.Pointer;
852 Args[0]->Common.Flags = AOPOBJ_DATA_VALID;
853 Args[1] = NULL;
854
855 /* Execute the method, no return value is expected */
856
857 Status = AcpiNsEvaluate (Info);
858
859 /* Clean up and return the status from AcpiNsEvaluate */
860
861 AcpiUtRemoveReference (Args[0]);
862
863 Cleanup:
864 ACPI_FREE (Info);
865 return_ACPI_STATUS (Status);
866 }