1 /*******************************************************************************
3 * Module Name: rsutils - Utilities for the resource manager
5 ******************************************************************************/
7 /******************************************************************************
11 * Some or all of this work - Copyright (c) 1999 - 2018, Intel Corp.
12 * All rights reserved.
16 * 2.1. This is your license from Intel Corp. under its intellectual property
17 * rights. You may have additional license terms from the party that provided
18 * you this software, covering your right to use that party's intellectual
21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22 * copy of the source code appearing in this file ("Covered Code") an
23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24 * base code distributed originally by Intel ("Original Intel Code") to copy,
25 * make derivatives, distribute, use and display any portion of the Covered
26 * Code in any form, with the right to sublicense such rights; and
28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29 * license (with the right to sublicense), under only those claims of Intel
30 * patents that are infringed by the Original Intel Code, to make, use, sell,
31 * offer to sell, and import the Covered Code and derivative works thereof
32 * solely to the minimum extent necessary to exercise the above copyright
33 * license, and in no event shall the patent license extend to any additions
34 * to or modifications of the Original Intel Code. No other license or right
35 * is granted directly or by implication, estoppel or otherwise;
37 * The above copyright and patent license is granted only if the following
42 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43 * Redistribution of source code of any substantial portion of the Covered
44 * Code or modification with rights to further distribute source must include
45 * the above Copyright Notice, the above License, this list of Conditions,
46 * and the following Disclaimer and Export Compliance provision. In addition,
47 * Licensee must cause all Covered Code to which Licensee contributes to
48 * contain a file documenting the changes Licensee made to create that Covered
49 * Code and the date of any change. Licensee must include in that file the
50 * documentation of any changes made by any predecessor Licensee. Licensee
51 * must include a prominent statement that the modification is derived,
52 * directly or indirectly, from Original Intel Code.
54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55 * Redistribution of source code of any substantial portion of the Covered
56 * Code or modification without rights to further distribute source must
57 * include the following Disclaimer and Export Compliance provision in the
58 * documentation and/or other materials provided with distribution. In
59 * addition, Licensee may not authorize further sublicense of source of any
60 * portion of the Covered Code, and must include terms to the effect that the
61 * license from Licensee to its licensee is limited to the intellectual
62 * property embodied in the software Licensee provides to its licensee, and
63 * not to intellectual property embodied in modifications its licensee may
66 * 3.3. Redistribution of Executable. Redistribution in executable form of any
67 * substantial portion of the Covered Code or modification must reproduce the
68 * above Copyright Notice, and the following Disclaimer and Export Compliance
69 * provision in the documentation and/or other materials provided with the
72 * 3.4. Intel retains all right, title, and interest in and to the Original
75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76 * Intel shall be used in advertising or otherwise to promote the sale, use or
77 * other dealings in products derived from or relating to the Covered Code
78 * without prior written authorization from Intel.
80 * 4. Disclaimer and Export Compliance
82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
99 * 4.3. Licensee shall not export, either directly or indirectly, any of this
100 * software or system incorporating such software without first obtaining any
101 * required license or other approval from the U. S. Department of Commerce or
102 * any other agency or department of the United States Government. In the
103 * event Licensee exports any such software from the United States or
104 * re-exports any such software from a foreign destination, Licensee shall
105 * ensure that the distribution and export/re-export of the software is in
106 * compliance with all laws, regulations, orders, or other restrictions of the
107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108 * any of its subsidiaries will export/re-export any technical data, process,
109 * software, or service, directly or indirectly, to any country for which the
110 * United States government or any agency thereof requires an export license,
111 * other governmental approval, or letter of assurance, without first obtaining
112 * such license, approval or letter.
114 *****************************************************************************
116 * Alternatively, you may choose to be licensed under the terms of the
119 * Redistribution and use in source and binary forms, with or without
120 * modification, are permitted provided that the following conditions
122 * 1. Redistributions of source code must retain the above copyright
123 * notice, this list of conditions, and the following disclaimer,
124 * without modification.
125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
126 * substantially similar to the "NO WARRANTY" disclaimer below
127 * ("Disclaimer") and any redistribution must be conditioned upon
128 * including a substantially similar Disclaimer requirement for further
129 * binary redistribution.
130 * 3. Neither the names of the above-listed copyright holders nor the names
131 * of any contributors may be used to endorse or promote products derived
132 * from this software without specific prior written permission.
134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
146 * Alternatively, you may choose to be licensed under the terms of the
147 * GNU General Public License ("GPL") version 2 as published by the Free
148 * Software Foundation.
150 *****************************************************************************/
153 #include "accommon.h"
154 #include "acnamesp.h"
158 #define _COMPONENT ACPI_RESOURCES
159 ACPI_MODULE_NAME ("rsutils")
162 /*******************************************************************************
164 * FUNCTION: AcpiRsDecodeBitmask
166 * PARAMETERS: Mask - Bitmask to decode
167 * List - Where the converted list is returned
169 * RETURN: Count of bits set (length of list)
171 * DESCRIPTION: Convert a bit mask into a list of values
173 ******************************************************************************/
176 AcpiRsDecodeBitmask (
184 ACPI_FUNCTION_ENTRY ();
187 /* Decode the mask bits */
189 for (i
= 0, BitCount
= 0; Mask
; i
++)
204 /*******************************************************************************
206 * FUNCTION: AcpiRsEncodeBitmask
208 * PARAMETERS: List - List of values to encode
209 * Count - Length of list
211 * RETURN: Encoded bitmask
213 * DESCRIPTION: Convert a list of values to an encoded bitmask
215 ******************************************************************************/
218 AcpiRsEncodeBitmask (
226 ACPI_FUNCTION_ENTRY ();
229 /* Encode the list into a single bitmask */
231 for (i
= 0, Mask
= 0; i
< Count
; i
++)
233 Mask
|= (0x1 << List
[i
]);
240 /*******************************************************************************
242 * FUNCTION: AcpiRsMoveData
244 * PARAMETERS: Destination - Pointer to the destination descriptor
245 * Source - Pointer to the source descriptor
246 * ItemCount - How many items to move
247 * MoveType - Byte width
251 * DESCRIPTION: Move multiple data items from one descriptor to another. Handles
252 * alignment issues and endian issues if necessary, as configured
253 * via the ACPI_MOVE_* macros. (This is why a memcpy is not used)
255 ******************************************************************************/
267 ACPI_FUNCTION_ENTRY ();
270 /* One move per item */
272 for (i
= 0; i
< ItemCount
; i
++)
277 * For the 8-bit case, we can perform the move all at once
278 * since there are no alignment or endian issues
281 case ACPI_RSC_MOVE_GPIO_RES
:
282 case ACPI_RSC_MOVE_SERIAL_VEN
:
283 case ACPI_RSC_MOVE_SERIAL_RES
:
285 memcpy (Destination
, Source
, ItemCount
);
289 * 16-, 32-, and 64-bit cases must use the move macros that perform
290 * endian conversion and/or accommodate hardware that cannot perform
291 * misaligned memory transfers
293 case ACPI_RSC_MOVE16
:
294 case ACPI_RSC_MOVE_GPIO_PIN
:
297 &ACPI_CAST_PTR (UINT16
, Destination
)[i
],
298 &ACPI_CAST_PTR (UINT16
, Source
)[i
]);
301 case ACPI_RSC_MOVE32
:
304 &ACPI_CAST_PTR (UINT32
, Destination
)[i
],
305 &ACPI_CAST_PTR (UINT32
, Source
)[i
]);
308 case ACPI_RSC_MOVE64
:
311 &ACPI_CAST_PTR (UINT64
, Destination
)[i
],
312 &ACPI_CAST_PTR (UINT64
, Source
)[i
]);
323 /*******************************************************************************
325 * FUNCTION: AcpiRsSetResourceLength
327 * PARAMETERS: TotalLength - Length of the AML descriptor, including
328 * the header and length fields.
329 * Aml - Pointer to the raw AML descriptor
333 * DESCRIPTION: Set the ResourceLength field of an AML
334 * resource descriptor, both Large and Small descriptors are
335 * supported automatically. Note: Descriptor Type field must
338 ******************************************************************************/
341 AcpiRsSetResourceLength (
342 ACPI_RSDESC_SIZE TotalLength
,
345 ACPI_RS_LENGTH ResourceLength
;
348 ACPI_FUNCTION_ENTRY ();
351 /* Length is the total descriptor length minus the header length */
353 ResourceLength
= (ACPI_RS_LENGTH
)
354 (TotalLength
- AcpiUtGetResourceHeaderLength (Aml
));
356 /* Length is stored differently for large and small descriptors */
358 if (Aml
->SmallHeader
.DescriptorType
& ACPI_RESOURCE_NAME_LARGE
)
360 /* Large descriptor -- bytes 1-2 contain the 16-bit length */
363 &Aml
->LargeHeader
.ResourceLength
, &ResourceLength
);
368 * Small descriptor -- bits 2:0 of byte 0 contain the length
369 * Clear any existing length, preserving descriptor type bits
371 Aml
->SmallHeader
.DescriptorType
= (UINT8
)
372 ((Aml
->SmallHeader
.DescriptorType
&
373 ~ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK
)
379 /*******************************************************************************
381 * FUNCTION: AcpiRsSetResourceHeader
383 * PARAMETERS: DescriptorType - Byte to be inserted as the type
384 * TotalLength - Length of the AML descriptor, including
385 * the header and length fields.
386 * Aml - Pointer to the raw AML descriptor
390 * DESCRIPTION: Set the DescriptorType and ResourceLength fields of an AML
391 * resource descriptor, both Large and Small descriptors are
392 * supported automatically
394 ******************************************************************************/
397 AcpiRsSetResourceHeader (
398 UINT8 DescriptorType
,
399 ACPI_RSDESC_SIZE TotalLength
,
402 ACPI_FUNCTION_ENTRY ();
405 /* Set the Resource Type */
407 Aml
->SmallHeader
.DescriptorType
= DescriptorType
;
409 /* Set the Resource Length */
411 AcpiRsSetResourceLength (TotalLength
, Aml
);
415 /*******************************************************************************
417 * FUNCTION: AcpiRsStrcpy
419 * PARAMETERS: Destination - Pointer to the destination string
420 * Source - Pointer to the source string
422 * RETURN: String length, including NULL terminator
424 * DESCRIPTION: Local string copy that returns the string length, saving a
425 * strcpy followed by a strlen.
427 ******************************************************************************/
437 ACPI_FUNCTION_ENTRY ();
440 for (i
= 0; Source
[i
]; i
++)
442 Destination
[i
] = Source
[i
];
447 /* Return string length including the NULL terminator */
449 return ((UINT16
) (i
+ 1));
453 /*******************************************************************************
455 * FUNCTION: AcpiRsGetResourceSource
457 * PARAMETERS: ResourceLength - Length field of the descriptor
458 * MinimumLength - Minimum length of the descriptor (minus
459 * any optional fields)
460 * ResourceSource - Where the ResourceSource is returned
461 * Aml - Pointer to the raw AML descriptor
462 * StringPtr - (optional) where to store the actual
463 * ResourceSource string
465 * RETURN: Length of the string plus NULL terminator, rounded up to native
468 * DESCRIPTION: Copy the optional ResourceSource data from a raw AML descriptor
469 * to an internal resource descriptor
471 ******************************************************************************/
474 AcpiRsGetResourceSource (
475 ACPI_RS_LENGTH ResourceLength
,
476 ACPI_RS_LENGTH MinimumLength
,
477 ACPI_RESOURCE_SOURCE
*ResourceSource
,
481 ACPI_RSDESC_SIZE TotalLength
;
482 UINT8
*AmlResourceSource
;
485 ACPI_FUNCTION_ENTRY ();
488 TotalLength
= ResourceLength
+ sizeof (AML_RESOURCE_LARGE_HEADER
);
489 AmlResourceSource
= ACPI_ADD_PTR (UINT8
, Aml
, MinimumLength
);
492 * ResourceSource is present if the length of the descriptor is longer
493 * than the minimum length.
495 * Note: Some resource descriptors will have an additional null, so
496 * we add 1 to the minimum length.
498 if (TotalLength
> (ACPI_RSDESC_SIZE
) (MinimumLength
+ 1))
500 /* Get the ResourceSourceIndex */
502 ResourceSource
->Index
= AmlResourceSource
[0];
504 ResourceSource
->StringPtr
= StringPtr
;
508 * String destination pointer is not specified; Set the String
509 * pointer to the end of the current ResourceSource structure.
511 ResourceSource
->StringPtr
= ACPI_ADD_PTR (
512 char, ResourceSource
, sizeof (ACPI_RESOURCE_SOURCE
));
516 * In order for the Resource length to be a multiple of the native
517 * word, calculate the length of the string (+1 for NULL terminator)
518 * and expand to the next word multiple.
520 * Zero the entire area of the buffer.
522 TotalLength
= (UINT32
) strlen (
523 ACPI_CAST_PTR (char, &AmlResourceSource
[1])) + 1;
525 TotalLength
= (UINT32
) ACPI_ROUND_UP_TO_NATIVE_WORD (TotalLength
);
527 memset (ResourceSource
->StringPtr
, 0, TotalLength
);
529 /* Copy the ResourceSource string to the destination */
531 ResourceSource
->StringLength
= AcpiRsStrcpy (
532 ResourceSource
->StringPtr
,
533 ACPI_CAST_PTR (char, &AmlResourceSource
[1]));
535 return ((ACPI_RS_LENGTH
) TotalLength
);
538 /* ResourceSource is not present */
540 ResourceSource
->Index
= 0;
541 ResourceSource
->StringLength
= 0;
542 ResourceSource
->StringPtr
= NULL
;
547 /*******************************************************************************
549 * FUNCTION: AcpiRsSetResourceSource
551 * PARAMETERS: Aml - Pointer to the raw AML descriptor
552 * MinimumLength - Minimum length of the descriptor (minus
553 * any optional fields)
554 * ResourceSource - Internal ResourceSource
557 * RETURN: Total length of the AML descriptor
559 * DESCRIPTION: Convert an optional ResourceSource from internal format to a
560 * raw AML resource descriptor
562 ******************************************************************************/
565 AcpiRsSetResourceSource (
567 ACPI_RS_LENGTH MinimumLength
,
568 ACPI_RESOURCE_SOURCE
*ResourceSource
)
570 UINT8
*AmlResourceSource
;
571 ACPI_RSDESC_SIZE DescriptorLength
;
574 ACPI_FUNCTION_ENTRY ();
577 DescriptorLength
= MinimumLength
;
579 /* Non-zero string length indicates presence of a ResourceSource */
581 if (ResourceSource
->StringLength
)
583 /* Point to the end of the AML descriptor */
585 AmlResourceSource
= ACPI_ADD_PTR (UINT8
, Aml
, MinimumLength
);
587 /* Copy the ResourceSourceIndex */
589 AmlResourceSource
[0] = (UINT8
) ResourceSource
->Index
;
591 /* Copy the ResourceSource string */
593 strcpy (ACPI_CAST_PTR (char, &AmlResourceSource
[1]),
594 ResourceSource
->StringPtr
);
597 * Add the length of the string (+ 1 for null terminator) to the
598 * final descriptor length
600 DescriptorLength
+= ((ACPI_RSDESC_SIZE
)
601 ResourceSource
->StringLength
+ 1);
604 /* Return the new total length of the AML descriptor */
606 return (DescriptorLength
);
610 /*******************************************************************************
612 * FUNCTION: AcpiRsGetPrtMethodData
614 * PARAMETERS: Node - Device node
615 * RetBuffer - Pointer to a buffer structure for the
620 * DESCRIPTION: This function is called to get the _PRT value of an object
621 * contained in an object specified by the handle passed in
623 * If the function fails an appropriate status will be returned
624 * and the contents of the callers buffer is undefined.
626 ******************************************************************************/
629 AcpiRsGetPrtMethodData (
630 ACPI_NAMESPACE_NODE
*Node
,
631 ACPI_BUFFER
*RetBuffer
)
633 ACPI_OPERAND_OBJECT
*ObjDesc
;
637 ACPI_FUNCTION_TRACE (RsGetPrtMethodData
);
640 /* Parameters guaranteed valid by caller */
642 /* Execute the method, no parameters */
644 Status
= AcpiUtEvaluateObject (
645 Node
, METHOD_NAME__PRT
, ACPI_BTYPE_PACKAGE
, &ObjDesc
);
646 if (ACPI_FAILURE (Status
))
648 return_ACPI_STATUS (Status
);
652 * Create a resource linked list from the byte stream buffer that comes
653 * back from the _CRS method execution.
655 Status
= AcpiRsCreatePciRoutingTable (ObjDesc
, RetBuffer
);
657 /* On exit, we must delete the object returned by EvaluateObject */
659 AcpiUtRemoveReference (ObjDesc
);
660 return_ACPI_STATUS (Status
);
664 /*******************************************************************************
666 * FUNCTION: AcpiRsGetCrsMethodData
668 * PARAMETERS: Node - Device node
669 * RetBuffer - Pointer to a buffer structure for the
674 * DESCRIPTION: This function is called to get the _CRS value of an object
675 * contained in an object specified by the handle passed in
677 * If the function fails an appropriate status will be returned
678 * and the contents of the callers buffer is undefined.
680 ******************************************************************************/
683 AcpiRsGetCrsMethodData (
684 ACPI_NAMESPACE_NODE
*Node
,
685 ACPI_BUFFER
*RetBuffer
)
687 ACPI_OPERAND_OBJECT
*ObjDesc
;
691 ACPI_FUNCTION_TRACE (RsGetCrsMethodData
);
694 /* Parameters guaranteed valid by caller */
696 /* Execute the method, no parameters */
698 Status
= AcpiUtEvaluateObject (
699 Node
, METHOD_NAME__CRS
, ACPI_BTYPE_BUFFER
, &ObjDesc
);
700 if (ACPI_FAILURE (Status
))
702 return_ACPI_STATUS (Status
);
706 * Make the call to create a resource linked list from the
707 * byte stream buffer that comes back from the _CRS method
710 Status
= AcpiRsCreateResourceList (ObjDesc
, RetBuffer
);
712 /* On exit, we must delete the object returned by evaluateObject */
714 AcpiUtRemoveReference (ObjDesc
);
715 return_ACPI_STATUS (Status
);
719 /*******************************************************************************
721 * FUNCTION: AcpiRsGetPrsMethodData
723 * PARAMETERS: Node - Device node
724 * RetBuffer - Pointer to a buffer structure for the
729 * DESCRIPTION: This function is called to get the _PRS value of an object
730 * contained in an object specified by the handle passed in
732 * If the function fails an appropriate status will be returned
733 * and the contents of the callers buffer is undefined.
735 ******************************************************************************/
738 AcpiRsGetPrsMethodData (
739 ACPI_NAMESPACE_NODE
*Node
,
740 ACPI_BUFFER
*RetBuffer
)
742 ACPI_OPERAND_OBJECT
*ObjDesc
;
746 ACPI_FUNCTION_TRACE (RsGetPrsMethodData
);
749 /* Parameters guaranteed valid by caller */
751 /* Execute the method, no parameters */
753 Status
= AcpiUtEvaluateObject (
754 Node
, METHOD_NAME__PRS
, ACPI_BTYPE_BUFFER
, &ObjDesc
);
755 if (ACPI_FAILURE (Status
))
757 return_ACPI_STATUS (Status
);
761 * Make the call to create a resource linked list from the
762 * byte stream buffer that comes back from the _CRS method
765 Status
= AcpiRsCreateResourceList (ObjDesc
, RetBuffer
);
767 /* On exit, we must delete the object returned by evaluateObject */
769 AcpiUtRemoveReference (ObjDesc
);
770 return_ACPI_STATUS (Status
);
774 /*******************************************************************************
776 * FUNCTION: AcpiRsGetAeiMethodData
778 * PARAMETERS: Node - Device node
779 * RetBuffer - Pointer to a buffer structure for the
784 * DESCRIPTION: This function is called to get the _AEI value of an object
785 * contained in an object specified by the handle passed in
787 * If the function fails an appropriate status will be returned
788 * and the contents of the callers buffer is undefined.
790 ******************************************************************************/
793 AcpiRsGetAeiMethodData (
794 ACPI_NAMESPACE_NODE
*Node
,
795 ACPI_BUFFER
*RetBuffer
)
797 ACPI_OPERAND_OBJECT
*ObjDesc
;
801 ACPI_FUNCTION_TRACE (RsGetAeiMethodData
);
804 /* Parameters guaranteed valid by caller */
806 /* Execute the method, no parameters */
808 Status
= AcpiUtEvaluateObject (
809 Node
, METHOD_NAME__AEI
, ACPI_BTYPE_BUFFER
, &ObjDesc
);
810 if (ACPI_FAILURE (Status
))
812 return_ACPI_STATUS (Status
);
816 * Make the call to create a resource linked list from the
817 * byte stream buffer that comes back from the _CRS method
820 Status
= AcpiRsCreateResourceList (ObjDesc
, RetBuffer
);
822 /* On exit, we must delete the object returned by evaluateObject */
824 AcpiUtRemoveReference (ObjDesc
);
825 return_ACPI_STATUS (Status
);
829 /*******************************************************************************
831 * FUNCTION: AcpiRsGetMethodData
833 * PARAMETERS: Handle - Handle to the containing object
834 * Path - Path to method, relative to Handle
835 * RetBuffer - Pointer to a buffer structure for the
840 * DESCRIPTION: This function is called to get the _CRS or _PRS value of an
841 * object contained in an object specified by the handle passed in
843 * If the function fails an appropriate status will be returned
844 * and the contents of the callers buffer is undefined.
846 ******************************************************************************/
849 AcpiRsGetMethodData (
852 ACPI_BUFFER
*RetBuffer
)
854 ACPI_OPERAND_OBJECT
*ObjDesc
;
858 ACPI_FUNCTION_TRACE (RsGetMethodData
);
861 /* Parameters guaranteed valid by caller */
863 /* Execute the method, no parameters */
865 Status
= AcpiUtEvaluateObject (
866 ACPI_CAST_PTR (ACPI_NAMESPACE_NODE
, Handle
),
867 Path
, ACPI_BTYPE_BUFFER
, &ObjDesc
);
868 if (ACPI_FAILURE (Status
))
870 return_ACPI_STATUS (Status
);
874 * Make the call to create a resource linked list from the
875 * byte stream buffer that comes back from the method
878 Status
= AcpiRsCreateResourceList (ObjDesc
, RetBuffer
);
880 /* On exit, we must delete the object returned by EvaluateObject */
882 AcpiUtRemoveReference (ObjDesc
);
883 return_ACPI_STATUS (Status
);
887 /*******************************************************************************
889 * FUNCTION: AcpiRsSetSrsMethodData
891 * PARAMETERS: Node - Device node
892 * InBuffer - Pointer to a buffer structure of the
897 * DESCRIPTION: This function is called to set the _SRS of an object contained
898 * in an object specified by the handle passed in
900 * If the function fails an appropriate status will be returned
901 * and the contents of the callers buffer is undefined.
903 * Note: Parameters guaranteed valid by caller
905 ******************************************************************************/
908 AcpiRsSetSrsMethodData (
909 ACPI_NAMESPACE_NODE
*Node
,
910 ACPI_BUFFER
*InBuffer
)
912 ACPI_EVALUATE_INFO
*Info
;
913 ACPI_OPERAND_OBJECT
*Args
[2];
918 ACPI_FUNCTION_TRACE (RsSetSrsMethodData
);
921 /* Allocate and initialize the evaluation information block */
923 Info
= ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO
));
926 return_ACPI_STATUS (AE_NO_MEMORY
);
929 Info
->PrefixNode
= Node
;
930 Info
->RelativePathname
= METHOD_NAME__SRS
;
931 Info
->Parameters
= Args
;
932 Info
->Flags
= ACPI_IGNORE_RETURN_VALUE
;
935 * The InBuffer parameter will point to a linked list of
936 * resource parameters. It needs to be formatted into a
937 * byte stream to be sent in as an input parameter to _SRS
939 * Convert the linked list into a byte stream
941 Buffer
.Length
= ACPI_ALLOCATE_LOCAL_BUFFER
;
942 Status
= AcpiRsCreateAmlResources (InBuffer
, &Buffer
);
943 if (ACPI_FAILURE (Status
))
948 /* Create and initialize the method parameter object */
950 Args
[0] = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER
);
954 * Must free the buffer allocated above (otherwise it is freed
957 ACPI_FREE (Buffer
.Pointer
);
958 Status
= AE_NO_MEMORY
;
962 Args
[0]->Buffer
.Length
= (UINT32
) Buffer
.Length
;
963 Args
[0]->Buffer
.Pointer
= Buffer
.Pointer
;
964 Args
[0]->Common
.Flags
= AOPOBJ_DATA_VALID
;
967 /* Execute the method, no return value is expected */
969 Status
= AcpiNsEvaluate (Info
);
971 /* Clean up and return the status from AcpiNsEvaluate */
973 AcpiUtRemoveReference (Args
[0]);
977 return_ACPI_STATUS (Status
);