rsmisc.c

acpi tools for linux include acpiexec and acpixtract

/*******************************************************************************
 *
 * Module Name: rsmisc - Miscellaneous resource descriptors
 *              $Revision: 1.48 $
 *
 ******************************************************************************/

/******************************************************************************
 *
 * 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 __RSMISC_C__

#include "acpi.h"
#include "acresrc.h"

#define _COMPONENT          ACPI_RESOURCES
        ACPI_MODULE_NAME    ("rsmisc")


#define INIT_RESOURCE_TYPE(i)       i->ResourceOffset
#define INIT_RESOURCE_LENGTH(i)     i->AmlOffset
#define INIT_TABLE_LENGTH(i)        i->Value

#define COMPARE_OPCODE(i)           i->ResourceOffset
#define COMPARE_TARGET(i)           i->AmlOffset
#define COMPARE_VALUE(i)            i->Value


/*******************************************************************************
 *
 * FUNCTION:    AcpiRsConvertAmlToResource
 *
 * PARAMETERS:  Resource            - Pointer to the resource descriptor
 *              Aml                 - Where the AML descriptor is returned
 *              Info                - Pointer to appropriate conversion table
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Convert an external AML resource descriptor to the corresponding
 *              internal resource descriptor
 *
 ******************************************************************************/

ACPI_STATUS
AcpiRsConvertAmlToResource (
    ACPI_RESOURCE           *Resource,
    AML_RESOURCE            *Aml,
    ACPI_RSCONVERT_INFO     *Info)
{
    ACPI_RS_LENGTH          AmlResourceLength;
    void                    *Source;
    void                    *Destination;
    char                    *Target;
    UINT8                   Count;
    UINT8                   FlagsMode = FALSE;
    UINT16                  ItemCount = 0;
    UINT16                  Temp16 = 0;


    ACPI_FUNCTION_TRACE (RsConvertAmlToResource);


    if (((ACPI_NATIVE_UINT) Resource) & 0x3)
    {
        /* Each internal resource struct is expected to be 32-bit aligned */

        ACPI_WARNING ((AE_INFO,
            "Misaligned resource pointer (get): %p Type %2.2X Len %X",
            Resource, Resource->Type, Resource->Length));
    }

    /* Extract the resource Length field (does not include header length) */

    AmlResourceLength = AcpiUtGetResourceLength (Aml);

    /*
     * First table entry must be ACPI_RSC_INITxxx and must contain the
     * table length (# of table entries)
     */
    Count = INIT_TABLE_LENGTH (Info);

    while (Count)
    {
        /*
         * Source is the external AML byte stream buffer,
         * destination is the internal resource descriptor
         */
        Source      = ACPI_ADD_PTR (void, Aml, Info->AmlOffset);
        Destination = ACPI_ADD_PTR (void, Resource, Info->ResourceOffset);

        switch (Info->Opcode)
        {
        case ACPI_RSC_INITGET:
            /*
             * Get the resource type and the initial (minimum) length
             */
            ACPI_MEMSET (Resource, 0, INIT_RESOURCE_LENGTH (Info));
            Resource->Type = INIT_RESOURCE_TYPE (Info);
            Resource->Length = INIT_RESOURCE_LENGTH (Info);
            break;


        case ACPI_RSC_INITSET:
            break;


        case ACPI_RSC_FLAGINIT:

            FlagsMode = TRUE;
            break;


        case ACPI_RSC_1BITFLAG:
            /*
             * Mask and shift the flag bit
             */
            ACPI_SET8 (Destination) = (UINT8)
                ((ACPI_GET8 (Source) >> Info->Value) & 0x01);
            break;


        case ACPI_RSC_2BITFLAG:
            /*
             * Mask and shift the flag bits
             */
            ACPI_SET8 (Destination) = (UINT8)
                ((ACPI_GET8 (Source) >> Info->Value) & 0x03);
            break;


        case ACPI_RSC_COUNT:

            ItemCount = ACPI_GET8 (Source);
            ACPI_SET8 (Destination) = (UINT8) ItemCount;

            Resource->Length = Resource->Length +
                (Info->Value * (ItemCount - 1));
            break;


        case ACPI_RSC_COUNT16:

            ItemCount = AmlResourceLength;
            ACPI_SET16 (Destination) = ItemCount;

            Resource->Length = Resource->Length +
                (Info->Value * (ItemCount - 1));
            break;


        case ACPI_RSC_LENGTH:

            Resource->Length = Resource->Length + Info->Value;
            break;


        case ACPI_RSC_MOVE8:
        case ACPI_RSC_MOVE16:
        case ACPI_RSC_MOVE32:
        case ACPI_RSC_MOVE64:
            /*
             * Raw data move. Use the Info value field unless ItemCount has
             * been previously initialized via a COUNT opcode
             */
            if (Info->Value)
            {
                ItemCount = Info->Value;
            }
            AcpiRsMoveData (Destination, Source, ItemCount, Info->Opcode);
            break;


        case ACPI_RSC_SET8:

            ACPI_MEMSET (Destination, Info->AmlOffset, Info->Value);
            break;


        case ACPI_RSC_DATA8:

            Target = ACPI_ADD_PTR (char, Resource, Info->Value);
            ACPI_MEMCPY (Destination, Source,  ACPI_GET16 (Target));
            break;


        case ACPI_RSC_ADDRESS:
            /*
             * Common handler for address descriptor flags
             */
            if (!AcpiRsGetAddressCommon (Resource, Aml))
            {
                return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE);
            }
            break;


        case ACPI_RSC_SOURCE:
            /*
             * Optional ResourceSource (Index and String)
             */
            Resource->Length +=
                AcpiRsGetResourceSource (AmlResourceLength, Info->Value,
                    Destination, Aml, NULL);
            break;


        case ACPI_RSC_SOURCEX:
            /*
             * Optional ResourceSource (Index and String). This is the more
             * complicated case used by the Interrupt() macro
             */
            Target = ACPI_ADD_PTR (char, Resource, Info->AmlOffset + (ItemCount * 4));

            Resource->Length +=
                AcpiRsGetResourceSource (AmlResourceLength,
                    (ACPI_RS_LENGTH) (((ItemCount - 1) * sizeof (UINT32)) + Info->Value),
                    Destination, Aml, Target);
            break;


        case ACPI_RSC_BITMASK:
            /*
             * 8-bit encoded bitmask (DMA macro)
             */
            ItemCount = AcpiRsDecodeBitmask (ACPI_GET8 (Source), Destination);
            if (ItemCount)
            {
                Resource->Length += (ItemCount - 1);
            }

            Target = ACPI_ADD_PTR (char, Resource, Info->Value);
            ACPI_SET8 (Target) = (UINT8) ItemCount;
            break;


        case ACPI_RSC_BITMASK16: