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minix/drivers/acpi/resources/rsutils.c
Tomas Hruby 9560b6dea8 ACPI driver 
- 99% of the code is Intel's ACPICA. The license is compliant with BSD
  and GNU and virtually all systems that use ACPI use this code, For
  instance it is part of the Linux kernel.

- The only minix specific files are

  acpi.c
  osminixxf.c
  platform/acminix.h

  and

  include/minix/acpi.h

- At the moment the driver does not register interrupt hooks which I
  believe is mainly for handling PnP, events like "battery level is
  low" and power management. Should not be difficult to add it if need
  be.

- The interface to the outside world is virtually non-existent except
  a trivial message based service for PCI driver to query which device
  is connected to what IRQ line. This will evolve as more components
  start using this driver. VM, Scheduler and IOMMU are the possible
  users right now.

- because of dependency on a native 64bit (long long, part of c99) it
  is compiled only with a gnu-like compilers which in case of Minix
  includes gcc llvm-gcc and clang
2010-09-02 15:44:04 +00:00

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/*******************************************************************************
*
* Module Name: rsutils - Utilities for the resource manager
*
******************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2010, Intel Corp.
* All rights reserved.
*
* 2. License
*
* 2.1. This is your license from Intel Corp. under its intellectual property
* rights. You may have additional license terms from the party that provided
* you this software, covering your right to use that party's intellectual
* property rights.
*
* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
* copy of the source code appearing in this file ("Covered Code") an
* irrevocable, perpetual, worldwide license under Intel's copyrights in the
* base code distributed originally by Intel ("Original Intel Code") to copy,
* make derivatives, distribute, use and display any portion of the Covered
* Code in any form, with the right to sublicense such rights; and
*
* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
* license (with the right to sublicense), under only those claims of Intel
* patents that are infringed by the Original Intel Code, to make, use, sell,
* offer to sell, and import the Covered Code and derivative works thereof
* solely to the minimum extent necessary to exercise the above copyright
* license, and in no event shall the patent license extend to any additions
* to or modifications of the Original Intel Code. No other license or right
* is granted directly or by implication, estoppel or otherwise;
*
* The above copyright and patent license is granted only if the following
* conditions are met:
*
* 3. Conditions
*
* 3.1. Redistribution of Source with Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification with rights to further distribute source must include
* the above Copyright Notice, the above License, this list of Conditions,
* and the following Disclaimer and Export Compliance provision. In addition,
* Licensee must cause all Covered Code to which Licensee contributes to
* contain a file documenting the changes Licensee made to create that Covered
* Code and the date of any change. Licensee must include in that file the
* documentation of any changes made by any predecessor Licensee. Licensee
* must include a prominent statement that the modification is derived,
* directly or indirectly, from Original Intel Code.
*
* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification without rights to further distribute source must
* include the following Disclaimer and Export Compliance provision in the
* documentation and/or other materials provided with distribution. In
* addition, Licensee may not authorize further sublicense of source of any
* portion of the Covered Code, and must include terms to the effect that the
* license from Licensee to its licensee is limited to the intellectual
* property embodied in the software Licensee provides to its licensee, and
* not to intellectual property embodied in modifications its licensee may
* make.
*
* 3.3. Redistribution of Executable. Redistribution in executable form of any
* substantial portion of the Covered Code or modification must reproduce the
* above Copyright Notice, and the following Disclaimer and Export Compliance
* provision in the documentation and/or other materials provided with the
* distribution.
*
* 3.4. Intel retains all right, title, and interest in and to the Original
* Intel Code.
*
* 3.5. Neither the name Intel nor any other trademark owned or controlled by
* Intel shall be used in advertising or otherwise to promote the sale, use or
* other dealings in products derived from or relating to the Covered Code
* without prior written authorization from Intel.
*
* 4. Disclaimer and Export Compliance
*
* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
* PARTICULAR PURPOSE.
*
* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
* LIMITED REMEDY.
*
* 4.3. Licensee shall not export, either directly or indirectly, any of this
* software or system incorporating such software without first obtaining any
* required license or other approval from the U. S. Department of Commerce or
* any other agency or department of the United States Government. In the
* event Licensee exports any such software from the United States or
* re-exports any such software from a foreign destination, Licensee shall
* ensure that the distribution and export/re-export of the software is in
* compliance with all laws, regulations, orders, or other restrictions of the
* U.S. Export Administration Regulations. Licensee agrees that neither it nor
* any of its subsidiaries will export/re-export any technical data, process,
* software, or service, directly or indirectly, to any country for which the
* United States government or any agency thereof requires an export license,
* other governmental approval, or letter of assurance, without first obtaining
* such license, approval or letter.
*
*****************************************************************************/
#define __RSUTILS_C__
#include "acpi.h"
#include "accommon.h"
#include "acnamesp.h"
#include "acresrc.h"
#define _COMPONENT ACPI_RESOURCES
ACPI_MODULE_NAME ("rsutils")
/*******************************************************************************
*
* FUNCTION: AcpiRsDecodeBitmask
*
* PARAMETERS: Mask - Bitmask to decode
* List - Where the converted list is returned
*
* RETURN: Count of bits set (length of list)
*
* DESCRIPTION: Convert a bit mask into a list of values
*
******************************************************************************/
UINT8
AcpiRsDecodeBitmask (
UINT16 Mask,
UINT8 *List)
{
UINT8 i;
UINT8 BitCount;
ACPI_FUNCTION_ENTRY ();
/* Decode the mask bits */
for (i = 0, BitCount = 0; Mask; i++)
{
if (Mask & 0x0001)
{
List[BitCount] = i;
BitCount++;
}
Mask >>= 1;
}
return (BitCount);
}
/*******************************************************************************
*
* FUNCTION: AcpiRsEncodeBitmask
*
* PARAMETERS: List - List of values to encode
* Count - Length of list
*
* RETURN: Encoded bitmask
*
* DESCRIPTION: Convert a list of values to an encoded bitmask
*
******************************************************************************/
UINT16
AcpiRsEncodeBitmask (
UINT8 *List,
UINT8 Count)
{
UINT32 i;
UINT16 Mask;
ACPI_FUNCTION_ENTRY ();
/* Encode the list into a single bitmask */
for (i = 0, Mask = 0; i < Count; i++)
{
Mask |= (0x1 << List[i]);
}
return (Mask);
}
/*******************************************************************************
*
* FUNCTION: AcpiRsMoveData
*
* PARAMETERS: Destination - Pointer to the destination descriptor
* Source - Pointer to the source descriptor
* ItemCount - How many items to move
* MoveType - Byte width
*
* RETURN: None
*
* DESCRIPTION: Move multiple data items from one descriptor to another. Handles
* alignment issues and endian issues if necessary, as configured
* via the ACPI_MOVE_* macros. (This is why a memcpy is not used)
*
******************************************************************************/
void
AcpiRsMoveData (
void *Destination,
void *Source,
UINT16 ItemCount,
UINT8 MoveType)
{
UINT32 i;
ACPI_FUNCTION_ENTRY ();
/* One move per item */
for (i = 0; i < ItemCount; i++)
{
switch (MoveType)
{
/*
* For the 8-bit case, we can perform the move all at once
* since there are no alignment or endian issues
*/
case ACPI_RSC_MOVE8:
ACPI_MEMCPY (Destination, Source, ItemCount);
return;
/*
* 16-, 32-, and 64-bit cases must use the move macros that perform
* endian conversion and/or accomodate hardware that cannot perform
* misaligned memory transfers
*/
case ACPI_RSC_MOVE16:
ACPI_MOVE_16_TO_16 (&ACPI_CAST_PTR (UINT16, Destination)[i],
&ACPI_CAST_PTR (UINT16, Source)[i]);
break;
case ACPI_RSC_MOVE32:
ACPI_MOVE_32_TO_32 (&ACPI_CAST_PTR (UINT32, Destination)[i],
&ACPI_CAST_PTR (UINT32, Source)[i]);
break;
case ACPI_RSC_MOVE64:
ACPI_MOVE_64_TO_64 (&ACPI_CAST_PTR (UINT64, Destination)[i],
&ACPI_CAST_PTR (UINT64, Source)[i]);
break;
default:
return;
}
}
}
/*******************************************************************************
*
* FUNCTION: AcpiRsSetResourceLength
*
* PARAMETERS: TotalLength - Length of the AML descriptor, including
* the header and length fields.
* Aml - Pointer to the raw AML descriptor
*
* RETURN: None
*
* DESCRIPTION: Set the ResourceLength field of an AML
* resource descriptor, both Large and Small descriptors are
* supported automatically. Note: Descriptor Type field must
* be valid.
*
******************************************************************************/
void
AcpiRsSetResourceLength (
ACPI_RSDESC_SIZE TotalLength,
AML_RESOURCE *Aml)
{
ACPI_RS_LENGTH ResourceLength;
ACPI_FUNCTION_ENTRY ();
/* Length is the total descriptor length minus the header length */
ResourceLength = (ACPI_RS_LENGTH)
(TotalLength - AcpiUtGetResourceHeaderLength (Aml));
/* Length is stored differently for large and small descriptors */
if (Aml->SmallHeader.DescriptorType & ACPI_RESOURCE_NAME_LARGE)
{
/* Large descriptor -- bytes 1-2 contain the 16-bit length */
ACPI_MOVE_16_TO_16 (&Aml->LargeHeader.ResourceLength, &ResourceLength);
}
else
{
/* Small descriptor -- bits 2:0 of byte 0 contain the length */
Aml->SmallHeader.DescriptorType = (UINT8)
/* Clear any existing length, preserving descriptor type bits */
((Aml->SmallHeader.DescriptorType & ~ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK)
| ResourceLength);
}
}
/*******************************************************************************
*
* FUNCTION: AcpiRsSetResourceHeader
*
* PARAMETERS: DescriptorType - Byte to be inserted as the type
* TotalLength - Length of the AML descriptor, including
* the header and length fields.
* Aml - Pointer to the raw AML descriptor
*
* RETURN: None
*
* DESCRIPTION: Set the DescriptorType and ResourceLength fields of an AML
* resource descriptor, both Large and Small descriptors are
* supported automatically
*
******************************************************************************/
void
AcpiRsSetResourceHeader (
UINT8 DescriptorType,
ACPI_RSDESC_SIZE TotalLength,
AML_RESOURCE *Aml)
{
ACPI_FUNCTION_ENTRY ();
/* Set the Resource Type */
Aml->SmallHeader.DescriptorType = DescriptorType;
/* Set the Resource Length */
AcpiRsSetResourceLength (TotalLength, Aml);
}
/*******************************************************************************
*
* FUNCTION: AcpiRsStrcpy
*
* PARAMETERS: Destination - Pointer to the destination string
* Source - Pointer to the source string
*
* RETURN: String length, including NULL terminator
*
* DESCRIPTION: Local string copy that returns the string length, saving a
* strcpy followed by a strlen.
*
******************************************************************************/
static UINT16
AcpiRsStrcpy (
char *Destination,
char *Source)
{
UINT16 i;
ACPI_FUNCTION_ENTRY ();
for (i = 0; Source[i]; i++)
{
Destination[i] = Source[i];
}
Destination[i] = 0;
/* Return string length including the NULL terminator */
return ((UINT16) (i + 1));
}
/*******************************************************************************
*
* FUNCTION: AcpiRsGetResourceSource
*
* PARAMETERS: ResourceLength - Length field of the descriptor
* MinimumLength - Minimum length of the descriptor (minus
* any optional fields)
* ResourceSource - Where the ResourceSource is returned
* Aml - Pointer to the raw AML descriptor
* StringPtr - (optional) where to store the actual
* ResourceSource string
*
* RETURN: Length of the string plus NULL terminator, rounded up to native
* word boundary
*
* DESCRIPTION: Copy the optional ResourceSource data from a raw AML descriptor
* to an internal resource descriptor
*
******************************************************************************/
ACPI_RS_LENGTH
AcpiRsGetResourceSource (
ACPI_RS_LENGTH ResourceLength,
ACPI_RS_LENGTH MinimumLength,
ACPI_RESOURCE_SOURCE *ResourceSource,
AML_RESOURCE *Aml,
char *StringPtr)
{
ACPI_RSDESC_SIZE TotalLength;
UINT8 *AmlResourceSource;
ACPI_FUNCTION_ENTRY ();
TotalLength = ResourceLength + sizeof (AML_RESOURCE_LARGE_HEADER);
AmlResourceSource = ACPI_ADD_PTR (UINT8, Aml, MinimumLength);
/*
* ResourceSource is present if the length of the descriptor is longer than
* the minimum length.
*
* Note: Some resource descriptors will have an additional null, so
* we add 1 to the minimum length.
*/
if (TotalLength > (ACPI_RSDESC_SIZE) (MinimumLength + 1))
{
/* Get the ResourceSourceIndex */
ResourceSource->Index = AmlResourceSource[0];
ResourceSource->StringPtr = StringPtr;
if (!StringPtr)
{
/*
* String destination pointer is not specified; Set the String
* pointer to the end of the current ResourceSource structure.
*/
ResourceSource->StringPtr = ACPI_ADD_PTR (char, ResourceSource,
sizeof (ACPI_RESOURCE_SOURCE));
}
/*
* In order for the Resource length to be a multiple of the native
* word, calculate the length of the string (+1 for NULL terminator)
* and expand to the next word multiple.
*
* Zero the entire area of the buffer.
*/
TotalLength = (UINT32) ACPI_STRLEN (
ACPI_CAST_PTR (char, &AmlResourceSource[1])) + 1;
TotalLength = (UINT32) ACPI_ROUND_UP_TO_NATIVE_WORD (TotalLength);
ACPI_MEMSET (ResourceSource->StringPtr, 0, TotalLength);
/* Copy the ResourceSource string to the destination */
ResourceSource->StringLength = AcpiRsStrcpy (ResourceSource->StringPtr,
ACPI_CAST_PTR (char, &AmlResourceSource[1]));
return ((ACPI_RS_LENGTH) TotalLength);
}
/* ResourceSource is not present */
ResourceSource->Index = 0;
ResourceSource->StringLength = 0;
ResourceSource->StringPtr = NULL;
return (0);
}
/*******************************************************************************
*
* FUNCTION: AcpiRsSetResourceSource
*
* PARAMETERS: Aml - Pointer to the raw AML descriptor
* MinimumLength - Minimum length of the descriptor (minus
* any optional fields)
* ResourceSource - Internal ResourceSource
*
* RETURN: Total length of the AML descriptor
*
* DESCRIPTION: Convert an optional ResourceSource from internal format to a
* raw AML resource descriptor
*
******************************************************************************/
ACPI_RSDESC_SIZE
AcpiRsSetResourceSource (
AML_RESOURCE *Aml,
ACPI_RS_LENGTH MinimumLength,
ACPI_RESOURCE_SOURCE *ResourceSource)
{
UINT8 *AmlResourceSource;
ACPI_RSDESC_SIZE DescriptorLength;
ACPI_FUNCTION_ENTRY ();
DescriptorLength = MinimumLength;
/* Non-zero string length indicates presence of a ResourceSource */
if (ResourceSource->StringLength)
{
/* Point to the end of the AML descriptor */
AmlResourceSource = ACPI_ADD_PTR (UINT8, Aml, MinimumLength);
/* Copy the ResourceSourceIndex */
AmlResourceSource[0] = (UINT8) ResourceSource->Index;
/* Copy the ResourceSource string */
ACPI_STRCPY (ACPI_CAST_PTR (char, &AmlResourceSource[1]),
ResourceSource->StringPtr);
/*
* Add the length of the string (+ 1 for null terminator) to the
* final descriptor length
*/
DescriptorLength += ((ACPI_RSDESC_SIZE) ResourceSource->StringLength + 1);
}
/* Return the new total length of the AML descriptor */
return (DescriptorLength);
}
/*******************************************************************************
*
* FUNCTION: AcpiRsGetPrtMethodData
*
* PARAMETERS: Node - Device node
* RetBuffer - Pointer to a buffer structure for the
* results
*
* RETURN: Status
*
* DESCRIPTION: This function is called to get the _PRT value of an object
* contained in an object specified by the handle passed in
*
* If the function fails an appropriate status will be returned
* and the contents of the callers buffer is undefined.
*
******************************************************************************/
ACPI_STATUS
AcpiRsGetPrtMethodData (
ACPI_NAMESPACE_NODE *Node,
ACPI_BUFFER *RetBuffer)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (RsGetPrtMethodData);
/* Parameters guaranteed valid by caller */
/* Execute the method, no parameters */
Status = AcpiUtEvaluateObject (Node, METHOD_NAME__PRT,
ACPI_BTYPE_PACKAGE, &ObjDesc);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* Create a resource linked list from the byte stream buffer that comes
* back from the _CRS method execution.
*/
Status = AcpiRsCreatePciRoutingTable (ObjDesc, RetBuffer);
/* On exit, we must delete the object returned by EvaluateObject */
AcpiUtRemoveReference (ObjDesc);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiRsGetCrsMethodData
*
* PARAMETERS: Node - Device node
* RetBuffer - Pointer to a buffer structure for the
* results
*
* RETURN: Status
*
* DESCRIPTION: This function is called to get the _CRS value of an object
* contained in an object specified by the handle passed in
*
* If the function fails an appropriate status will be returned
* and the contents of the callers buffer is undefined.
*
******************************************************************************/
ACPI_STATUS
AcpiRsGetCrsMethodData (
ACPI_NAMESPACE_NODE *Node,
ACPI_BUFFER *RetBuffer)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (RsGetCrsMethodData);
/* Parameters guaranteed valid by caller */
/* Execute the method, no parameters */
Status = AcpiUtEvaluateObject (Node, METHOD_NAME__CRS,
ACPI_BTYPE_BUFFER, &ObjDesc);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* Make the call to create a resource linked list from the
* byte stream buffer that comes back from the _CRS method
* execution.
*/
Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
/* On exit, we must delete the object returned by evaluateObject */
AcpiUtRemoveReference (ObjDesc);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiRsGetPrsMethodData
*
* PARAMETERS: Node - Device node
* RetBuffer - Pointer to a buffer structure for the
* results
*
* RETURN: Status
*
* DESCRIPTION: This function is called to get the _PRS value of an object
* contained in an object specified by the handle passed in
*
* If the function fails an appropriate status will be returned
* and the contents of the callers buffer is undefined.
*
******************************************************************************/
ACPI_STATUS
AcpiRsGetPrsMethodData (
ACPI_NAMESPACE_NODE *Node,
ACPI_BUFFER *RetBuffer)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (RsGetPrsMethodData);
/* Parameters guaranteed valid by caller */
/* Execute the method, no parameters */
Status = AcpiUtEvaluateObject (Node, METHOD_NAME__PRS,
ACPI_BTYPE_BUFFER, &ObjDesc);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* Make the call to create a resource linked list from the
* byte stream buffer that comes back from the _CRS method
* execution.
*/
Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
/* On exit, we must delete the object returned by evaluateObject */
AcpiUtRemoveReference (ObjDesc);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiRsGetMethodData
*
* PARAMETERS: Handle - Handle to the containing object
* Path - Path to method, relative to Handle
* RetBuffer - Pointer to a buffer structure for the
* results
*
* RETURN: Status
*
* DESCRIPTION: This function is called to get the _CRS or _PRS value of an
* object contained in an object specified by the handle passed in
*
* If the function fails an appropriate status will be returned
* and the contents of the callers buffer is undefined.
*
******************************************************************************/
ACPI_STATUS
AcpiRsGetMethodData (
ACPI_HANDLE Handle,
char *Path,
ACPI_BUFFER *RetBuffer)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (RsGetMethodData);
/* Parameters guaranteed valid by caller */
/* Execute the method, no parameters */
Status = AcpiUtEvaluateObject (Handle, Path, ACPI_BTYPE_BUFFER, &ObjDesc);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* Make the call to create a resource linked list from the
* byte stream buffer that comes back from the method
* execution.
*/
Status = AcpiRsCreateResourceList (ObjDesc, RetBuffer);
/* On exit, we must delete the object returned by EvaluateObject */
AcpiUtRemoveReference (ObjDesc);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiRsSetSrsMethodData
*
* PARAMETERS: Node - Device node
* InBuffer - Pointer to a buffer structure of the
* parameter
*
* RETURN: Status
*
* DESCRIPTION: This function is called to set the _SRS of an object contained
* in an object specified by the handle passed in
*
* If the function fails an appropriate status will be returned
* and the contents of the callers buffer is undefined.
*
* Note: Parameters guaranteed valid by caller
*
******************************************************************************/
ACPI_STATUS
AcpiRsSetSrsMethodData (
ACPI_NAMESPACE_NODE *Node,
ACPI_BUFFER *InBuffer)
{
ACPI_EVALUATE_INFO *Info;
ACPI_OPERAND_OBJECT *Args[2];
ACPI_STATUS Status;
ACPI_BUFFER Buffer;
ACPI_FUNCTION_TRACE (RsSetSrsMethodData);
/* Allocate and initialize the evaluation information block */
Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
if (!Info)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
Info->PrefixNode = Node;
Info->Pathname = METHOD_NAME__SRS;
Info->Parameters = Args;
Info->Flags = ACPI_IGNORE_RETURN_VALUE;
/*
* The InBuffer parameter will point to a linked list of
* resource parameters. It needs to be formatted into a
* byte stream to be sent in as an input parameter to _SRS
*
* Convert the linked list into a byte stream
*/
Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER;
Status = AcpiRsCreateAmlResources (InBuffer->Pointer, &Buffer);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
/* Create and initialize the method parameter object */
Args[0] = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER);
if (!Args[0])
{
/*
* Must free the buffer allocated above (otherwise it is freed
* later)
*/
ACPI_FREE (Buffer.Pointer);
Status = AE_NO_MEMORY;
goto Cleanup;
}
Args[0]->Buffer.Length = (UINT32) Buffer.Length;
Args[0]->Buffer.Pointer = Buffer.Pointer;
Args[0]->Common.Flags = AOPOBJ_DATA_VALID;
Args[1] = NULL;
/* Execute the method, no return value is expected */
Status = AcpiNsEvaluate (Info);
/* Clean up and return the status from AcpiNsEvaluate */
AcpiUtRemoveReference (Args[0]);
Cleanup:
ACPI_FREE (Info);
return_ACPI_STATUS (Status);
}
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