rsutils.c

来自「acpi tools for linux include acpiexec a」· C语言 代码 · 共 876 行 · 第 1/2 页

    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->ParameterType = ACPI_PARAM_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);
}