rscreate.c

acpi tools for linux include acpiexec and acpixtract

/*******************************************************************************
 *
 * Module Name: rscreate - Create resource lists/tables
 *              $Revision: 1.79 $
 *
 ******************************************************************************/

/******************************************************************************
 *
 * 1. Copyright Notice
 *
 * Some or all of this work - Copyright (c) 1999 - 2008, 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 __RSCREATE_C__

#include "acpi.h"
#include "acresrc.h"
#include "amlcode.h"
#include "acnamesp.h"

#define _COMPONENT          ACPI_RESOURCES
        ACPI_MODULE_NAME    ("rscreate")


/*******************************************************************************
 *
 * FUNCTION:    AcpiRsCreateResourceList
 *
 * PARAMETERS:  AmlBuffer           - Pointer to the resource byte stream
 *              OutputBuffer        - Pointer to the user's buffer
 *
 * RETURN:      Status: AE_OK if okay, else a valid ACPI_STATUS code
 *              If OutputBuffer is not large enough, OutputBufferLength
 *              indicates how large OutputBuffer should be, else it
 *              indicates how may UINT8 elements of OutputBuffer are valid.
 *
 * DESCRIPTION: Takes the byte stream returned from a _CRS, _PRS control method
 *              execution and parses the stream to create a linked list
 *              of device resources.
 *
 ******************************************************************************/

ACPI_STATUS
AcpiRsCreateResourceList (
    ACPI_OPERAND_OBJECT     *AmlBuffer,
    ACPI_BUFFER             *OutputBuffer)
{

    ACPI_STATUS             Status;
    UINT8                   *AmlStart;
    ACPI_SIZE               ListSizeNeeded = 0;
    UINT32                  AmlBufferLength;
    void                    *Resource;


    ACPI_FUNCTION_TRACE (RsCreateResourceList);


    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "AmlBuffer = %p\n",
        AmlBuffer));

    /* Params already validated, so we don't re-validate here */

    AmlBufferLength = AmlBuffer->Buffer.Length;
    AmlStart = AmlBuffer->Buffer.Pointer;

    /*
     * Pass the AmlBuffer into a module that can calculate
     * the buffer size needed for the linked list
     */
    Status = AcpiRsGetListLength (AmlStart, AmlBufferLength,
                &ListSizeNeeded);

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Status=%X ListSizeNeeded=%X\n",
        Status, (UINT32) ListSizeNeeded));
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Validate/Allocate/Clear caller buffer */

    Status = AcpiUtInitializeBuffer (OutputBuffer, ListSizeNeeded);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Do the conversion */

    Resource = OutputBuffer->Pointer;
    Status = AcpiUtWalkAmlResources (AmlStart, AmlBufferLength,
                AcpiRsConvertAmlToResources, &Resource);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "OutputBuffer %p Length %X\n",
            OutputBuffer->Pointer, (UINT32) OutputBuffer->Length));
    return_ACPI_STATUS (AE_OK);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiRsCreatePciRoutingTable
 *
 * PARAMETERS:  PackageObject           - Pointer to an ACPI_OPERAND_OBJECT
 *                                        package
 *              OutputBuffer            - Pointer to the user's buffer
 *
 * RETURN:      Status  AE_OK if okay, else a valid ACPI_STATUS code.
 *              If the OutputBuffer is too small, the error will be
 *              AE_BUFFER_OVERFLOW and OutputBuffer->Length will point
 *              to the size buffer needed.
 *
 * DESCRIPTION: Takes the ACPI_OPERAND_OBJECT  package and creates a
 *              linked list of PCI interrupt descriptions
 *
 * NOTE: It is the caller's responsibility to ensure that the start of the
 * output buffer is aligned properly (if necessary).
 *
 ******************************************************************************/

ACPI_STATUS
AcpiRsCreatePciRoutingTable (
    ACPI_OPERAND_OBJECT     *PackageObject,
    ACPI_BUFFER             *OutputBuffer)
{
    UINT8                   *Buffer;
    ACPI_OPERAND_OBJECT     **TopObjectList;
    ACPI_OPERAND_OBJECT     **SubObjectList;
    ACPI_OPERAND_OBJECT     *ObjDesc;
    ACPI_SIZE               BufferSizeNeeded = 0;
    UINT32                  NumberOfElements;
    UINT32                  Index;
    ACPI_PCI_ROUTING_TABLE  *UserPrt;
    ACPI_NAMESPACE_NODE     *Node;
    ACPI_STATUS             Status;
    ACPI_BUFFER             PathBuffer;


    ACPI_FUNCTION_TRACE (RsCreatePciRoutingTable);


    /* Params already validated, so we don't re-validate here */

    /* Get the required buffer length */

    Status = AcpiRsGetPciRoutingTableLength (PackageObject,
                &BufferSizeNeeded);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "BufferSizeNeeded = %X\n",
        (UINT32) BufferSizeNeeded));