asloperands.c

acpi tools for linux include acpiexec and acpixtract

/******************************************************************************
 *
 * Module Name: asloperands - AML operand processing
 *              $Revision: 1.64 $
 *
 *****************************************************************************/

/******************************************************************************
 *
 * 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.
 *
 *****************************************************************************/


#include "aslcompiler.h"
#include "aslcompiler.y.h"
#include "amlcode.h"

#define _COMPONENT          ACPI_COMPILER
        ACPI_MODULE_NAME    ("asloperands")

/* Local prototypes */

static void
OpnDoField (
    ACPI_PARSE_OBJECT       *Op);

static void
OpnDoBankField (
    ACPI_PARSE_OBJECT       *Op);

static void
OpnDoBuffer (
    ACPI_PARSE_OBJECT       *Op);

static void
OpnDoDefinitionBlock (
    ACPI_PARSE_OBJECT       *Op);

static void
OpnDoFieldCommon (
    ACPI_PARSE_OBJECT       *FieldOp,
    ACPI_PARSE_OBJECT       *Op);

static void
OpnDoIndexField (
    ACPI_PARSE_OBJECT       *Op);

static void
OpnDoLoadTable (
    ACPI_PARSE_OBJECT       *Op);

static void
OpnDoMethod (
    ACPI_PARSE_OBJECT       *Op);

static void
OpnDoMutex (
    ACPI_PARSE_OBJECT       *Op);

static void
OpnDoRegion (
    ACPI_PARSE_OBJECT       *Op);

static void
OpnAttachNameToNode (
    ACPI_PARSE_OBJECT       *Op);


/*******************************************************************************
 *
 * FUNCTION:    OpnDoMutex
 *
 * PARAMETERS:  Op        - The parent parse node
 *
 * RETURN:      None
 *
 * DESCRIPTION: Construct the operands for the MUTEX ASL keyword.
 *
 ******************************************************************************/

static void
OpnDoMutex (
    ACPI_PARSE_OBJECT       *Op)
{
    ACPI_PARSE_OBJECT       *Next;


    Next = Op->Asl.Child;
    Next = Next->Asl.Next;

    if (Next->Asl.Value.Integer > 15)
    {
        AslError (ASL_ERROR, ASL_MSG_SYNC_LEVEL, Next, NULL);
    }
    return;
}


/*******************************************************************************
 *
 * FUNCTION:    OpnDoMethod
 *
 * PARAMETERS:  Op        - The parent parse node
 *
 * RETURN:      None
 *
 * DESCRIPTION: Construct the operands for the METHOD ASL keyword.
 *
 ******************************************************************************/

static void
OpnDoMethod (
    ACPI_PARSE_OBJECT       *Op)
{
    ACPI_PARSE_OBJECT       *Next;

    /* Optional arguments for this opcode with defaults */

    UINT8                   NumArgs = 0;
    UINT8                   Serialized = 0;
    UINT8                   Concurrency = 0;
    UINT8                   MethodFlags;


    /* Opcode and package length first */
    /* Method name */

    Next = Op->Asl.Child;

    /* Num args */

    Next = Next->Asl.Next;
    if (Next->Asl.ParseOpcode != PARSEOP_DEFAULT_ARG)
    {
        NumArgs = (UINT8) Next->Asl.Value.Integer;
        Next->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;
    }

    /* Serialized Flag */

    Next = Next->Asl.Next;
    if (Next->Asl.ParseOpcode != PARSEOP_DEFAULT_ARG)
    {
        Serialized = (UINT8) Next->Asl.Value.Integer;
        Next->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;
    }

    /* Concurrency value (valid values are 0-15) */

    Next = Next->Asl.Next;
    if (Next->Asl.ParseOpcode != PARSEOP_DEFAULT_ARG)
    {
        if (Next->Asl.Value.Integer > 15)
        {
            AslError (ASL_ERROR, ASL_MSG_SYNC_LEVEL, Next, NULL);
        }
        Concurrency = (UINT8) Next->Asl.Value.Integer;
    }

    /* Put the bits in their proper places */

    MethodFlags = (UINT8) ((NumArgs & 0x7) |
                          ((Serialized & 0x1) << 3) |
                          ((Concurrency & 0xF) << 4));

    /* Use the last node for the combined flags byte */

    Next->Asl.Value.Integer = MethodFlags;
    Next->Asl.AmlOpcode = AML_RAW_DATA_BYTE;
    Next->Asl.AmlLength = 1;
    Next->Asl.ParseOpcode = PARSEOP_RAW_DATA;

    /* Save the arg count in the first node */

    Op->Asl.Extra = NumArgs;
}


/*******************************************************************************
 *
 * FUNCTION:    OpnDoFieldCommon
 *
 * PARAMETERS:  FieldOp       - Node for an ASL field
 *              Op            - The parent parse node
 *
 * RETURN:      None
 *
 * DESCRIPTION: Construct the AML operands for the various field keywords,
 *              FIELD, BANKFIELD, INDEXFIELD
 *
 ******************************************************************************/

static void
OpnDoFieldCommon (
    ACPI_PARSE_OBJECT       *FieldOp,
    ACPI_PARSE_OBJECT       *Op)
{
    ACPI_PARSE_OBJECT       *Next;
    ACPI_PARSE_OBJECT       *PkgLengthNode;
    UINT32                  CurrentBitOffset;
    UINT32                  NewBitOffset;
    UINT8                   AccessType;
    UINT8                   LockRule;
    UINT8                   UpdateRule;
    UINT8                   FieldFlags;
    UINT32                  MinimumLength;


    /* AccessType -- not optional, so no need to check for DEFAULT_ARG */

    AccessType = (UINT8) Op->Asl.Value.Integer;
    Op->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;

    /* Set the access type in the parent (field) node for use later */

    FieldOp->Asl.Value.Integer = AccessType;

    /* LockRule -- not optional, so no need to check for DEFAULT_ARG */

    Next = Op->Asl.Next;
    LockRule = (UINT8) Next->Asl.Value.Integer;
    Next->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;

    /* UpdateRule -- not optional, so no need to check for DEFAULT_ARG */

    Next = Next->Asl.Next;
    UpdateRule = (UINT8) Next->Asl.Value.Integer;

    /*
     * Generate the flags byte.  The various fields are already
     * in the right bit position via translation from the
     * keywords by the parser.
     */
    FieldFlags = (UINT8) (AccessType | LockRule | UpdateRule);

    /* Use the previous node to be the FieldFlags node */

    /* Set the node to RAW_DATA */

    Next->Asl.Value.Integer = FieldFlags;
    Next->Asl.AmlOpcode     = AML_RAW_DATA_BYTE;
    Next->Asl.AmlLength     = 1;
    Next->Asl.ParseOpcode   = PARSEOP_RAW_DATA;

    /* Process the FieldUnitList */

    Next = Next->Asl.Next;
    CurrentBitOffset = 0;

    while (Next)
    {
        /* Save the offset of this field unit */

        Next->Asl.ExtraValue = CurrentBitOffset;

        switch (Next->Asl.ParseOpcode)
        {
        case PARSEOP_ACCESSAS:

            PkgLengthNode = Next->Asl.Child;
            AccessType = (UINT8) PkgLengthNode->Asl.Value.Integer;

            /* Nothing additional to do */
            break;


        case PARSEOP_OFFSET:

            /* New offset into the field */

            PkgLengthNode = Next->Asl.Child;
            NewBitOffset = ((UINT32) PkgLengthNode->Asl.Value.Integer) * 8;

            /*
             * Examine the specified offset in relation to the
             * current offset counter.
             */
            if (NewBitOffset < CurrentBitOffset)
            {
                /*
                 * Not allowed to specify a backwards offset!
                 * Issue error and ignore this node.
                 */
                AslError (ASL_ERROR, ASL_MSG_BACKWARDS_OFFSET, PkgLengthNode,
                    NULL);
                Next->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;
                PkgLengthNode->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;
            }
            else if (NewBitOffset == CurrentBitOffset)
            {
                /*
                 * Offset is redundant; we don't need to output an
                 * offset opcode.  Just set these nodes to default
                 */
                Next->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;
                PkgLengthNode->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;
            }
            else
            {
                /*
                 * Valid new offset - set the value to be inserted into the AML
                 * and update the offset counter.
                 */
                PkgLengthNode->Asl.Value.Integer =
                    NewBitOffset - CurrentBitOffset;
                CurrentBitOffset = NewBitOffset;
            }
            break;