asloperands.c

acpi tools for linux include acpiexec and acpixtract

        case PARSEOP_NAMESEG:
        case PARSEOP_RESERVED_BYTES:

            /* Named or reserved field entry */

            PkgLengthNode     = Next->Asl.Child;
            NewBitOffset      = (UINT32) PkgLengthNode->Asl.Value.Integer;
            CurrentBitOffset += NewBitOffset;

            /* Save the current AccessAs value for error checking later */

            switch (AccessType)
            {
                case AML_FIELD_ACCESS_ANY:
                case AML_FIELD_ACCESS_BYTE:
                case AML_FIELD_ACCESS_BUFFER:
                default:
                    MinimumLength = 8;
                    break;

                case AML_FIELD_ACCESS_WORD:
                    MinimumLength = 16;
                    break;

                case AML_FIELD_ACCESS_DWORD:
                    MinimumLength = 32;
                    break;

                case AML_FIELD_ACCESS_QWORD:
                    MinimumLength = 64;
                    break;
            }

            PkgLengthNode->Asl.ExtraValue = MinimumLength;
            break;

        default:
            /* All supported field opcodes must appear above */
            break;
        }

        /* Move on to next entry in the field list */

        Next = Next->Asl.Next;
    }
}


/*******************************************************************************
 *
 * FUNCTION:    OpnDoField
 *
 * PARAMETERS:  Op        - The parent parse node
 *
 * RETURN:      None
 *
 * DESCRIPTION: Construct the AML operands for the FIELD ASL keyword
 *
 ******************************************************************************/

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


    /* Opcode is parent node */
    /* First child is field name */

    Next = Op->Asl.Child;

    /* Second child is the AccessType */

    OpnDoFieldCommon (Op, Next->Asl.Next);
}


/*******************************************************************************
 *
 * FUNCTION:    OpnDoIndexField
 *
 * PARAMETERS:  Op        - The parent parse node
 *
 * RETURN:      None
 *
 * DESCRIPTION: Construct the AML operands for the INDEXFIELD ASL keyword
 *
 ******************************************************************************/

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


    /* Opcode is parent node */
    /* First child is the index name */

    Next = Op->Asl.Child;

    /* Second child is the data name */

    Next = Next->Asl.Next;

    /* Third child is the AccessType */

    OpnDoFieldCommon (Op, Next->Asl.Next);
}


/*******************************************************************************
 *
 * FUNCTION:    OpnDoBankField
 *
 * PARAMETERS:  Op        - The parent parse node
 *
 * RETURN:      None
 *
 * DESCRIPTION: Construct the AML operands for the BANKFIELD ASL keyword
 *
 ******************************************************************************/

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


    /* Opcode is parent node */
    /* First child is the region name */

    Next = Op->Asl.Child;

    /* Second child is the bank name */

    Next = Next->Asl.Next;

    /* Third child is the bank value */

    Next = Next->Asl.Next;

    /* Fourth child is the AccessType */

    OpnDoFieldCommon (Op, Next->Asl.Next);
}


/*******************************************************************************
 *
 * FUNCTION:    OpnDoRegion
 *
 * PARAMETERS:  Op        - The parent parse node
 *
 * RETURN:      None
 *
 * DESCRIPTION: Tries to get the length of the region.  Can only do this at
 *              compile time if the length is a constant.
 *
 ******************************************************************************/

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


    /* Opcode is parent node */
    /* First child is the region name */

    Next = Op->Asl.Child;

    /* Second child is the space ID*/

    Next = Next->Asl.Next;

    /* Third child is the region offset */

    Next = Next->Asl.Next;

    /* Fourth child is the region length */

    Next = Next->Asl.Next;
    if (Next->Asl.ParseOpcode == PARSEOP_INTEGER)
    {
        Op->Asl.Value.Integer = Next->Asl.Value.Integer;
    }
    else
    {
        Op->Asl.Value.Integer = ACPI_INTEGER_MAX;
    }
}


/*******************************************************************************
 *
 * FUNCTION:    OpnDoBuffer
 *
 * PARAMETERS:  Op        - The parent parse node
 *
 * RETURN:      None
 *
 * DESCRIPTION: Construct the AML operands for the BUFFER ASL keyword.  We
 *              build a single raw byte buffer from the initialization nodes,
 *              each parse node contains a buffer byte.
 *
 ******************************************************************************/

static void
OpnDoBuffer (
    ACPI_PARSE_OBJECT       *Op)
{
    ACPI_PARSE_OBJECT       *InitializerOp;
    ACPI_PARSE_OBJECT       *BufferLengthOp;

    /* Optional arguments for this opcode with defaults */

    UINT32                  BufferLength = 0;


    /* Opcode and package length first */
    /* Buffer Length is next, followed by the initializer list */

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

    /*
     * If the BufferLength is not an INTEGER or was not specified in the ASL
     * (DEFAULT_ARG), it is a TermArg that is
     * evaluated at run-time, and we are therefore finished.
     */
    if ((BufferLengthOp->Asl.ParseOpcode != PARSEOP_INTEGER) &&
        (BufferLengthOp->Asl.ParseOpcode != PARSEOP_DEFAULT_ARG))
    {
        return;
    }

    /*
     * We want to count the number of items in the initializer list, because if
     * it is larger than the buffer length, we will define the buffer size
     * to be the size of the initializer list (as per the ACPI Specification)
     */
    switch (InitializerOp->Asl.ParseOpcode)
    {
    case PARSEOP_INTEGER:
    case PARSEOP_BYTECONST:
    case PARSEOP_WORDCONST:
    case PARSEOP_DWORDCONST:

        /* The peer list contains the byte list (if any...) */

        while (InitializerOp)
        {
            /* For buffers, this is a list of raw bytes */

            InitializerOp->Asl.AmlOpcode      = AML_RAW_DATA_BYTE;
            InitializerOp->Asl.AmlLength      = 1;
            InitializerOp->Asl.ParseOpcode    = PARSEOP_RAW_DATA;

            BufferLength++;
            InitializerOp = ASL_GET_PEER_NODE (InitializerOp);
        }
        break;


    case PARSEOP_STRING_LITERAL:

        /*
         * Only one initializer, the string.  Buffer must be big enough to hold
         * the string plus the null termination byte
         */
        BufferLength = strlen (InitializerOp->Asl.Value.String) + 1;

        InitializerOp->Asl.AmlOpcode      = AML_RAW_DATA_BUFFER;
        InitializerOp->Asl.AmlLength      = BufferLength;
        InitializerOp->Asl.ParseOpcode    = PARSEOP_RAW_DATA;
        break;


    case PARSEOP_RAW_DATA:

        /* Buffer nodes are already initialized (e.g. Unicode operator) */
        return;


    case PARSEOP_DEFAULT_ARG:
        break;


    default:
        AslError (ASL_ERROR, ASL_MSG_INVALID_OPERAND, InitializerOp,
            "Unknown buffer initializer opcode");
        printf ("Unknown buffer initializer opcode [%s]\n",
                        UtGetOpName (InitializerOp->Asl.ParseOpcode));
        return;
    }

    /* Check if initializer list is longer than the buffer length */

    if (BufferLengthOp->Asl.Value.Integer > BufferLength)
    {
        BufferLength = (UINT32) BufferLengthOp->Asl.Value.Integer;
    }

    if (!BufferLength)
    {
        /* No length AND no items -- issue notice */

        AslError (ASL_REMARK, ASL_MSG_BUFFER_LENGTH, BufferLengthOp, NULL);

        /* But go ahead and put the buffer length of zero into the AML */
    }

    /*
     * Just set the buffer size node to be the buffer length, regardless
     * of whether it was previously an integer or a default_arg placeholder
     */
    BufferLengthOp->Asl.ParseOpcode   = PARSEOP_INTEGER;
    BufferLengthOp->Asl.AmlOpcode     = AML_DWORD_OP;
    BufferLengthOp->Asl.Value.Integer = BufferLength;

    (void) OpcSetOptimalIntegerSize (BufferLengthOp);

    /* Remaining nodes are handled via the tree walk */
}


/*******************************************************************************
 *
 * FUNCTION:    OpnDoPackage
 *
 * PARAMETERS:  Op        - The parent parse node
 *
 * RETURN:      None
 *
 * DESCRIPTION: Construct the AML operands for the PACKAGE ASL keyword.  NOTE:
 *              can only be called after constants have been folded, to ensure
 *              that the PackageLength operand has been fully reduced.
 *
 ******************************************************************************/

void
OpnDoPackage (
    ACPI_PARSE_OBJECT       *Op)
{
    ACPI_PARSE_OBJECT       *InitializerOp;
    ACPI_PARSE_OBJECT       *PackageLengthOp;
    UINT32                  PackageLength = 0;


    /* Opcode and package length first, followed by the initializer list */

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

    /* Count the number of items in the initializer list */

    if (InitializerOp->Asl.ParseOpcode != PARSEOP_DEFAULT_ARG)
    {
        /* The peer list contains the byte list (if any...) */

        while (InitializerOp)
        {
            PackageLength++;
            InitializerOp = InitializerOp->Asl.Next;
        }
    }

    /* If package length is a constant, compare to the initializer list */

    if ((PackageLengthOp->Asl.ParseOpcode == PARSEOP_INTEGER)      ||
        (PackageLengthOp->Asl.ParseOpcode == PARSEOP_QWORDCONST))
    {
        if (PackageLengthOp->Asl.Value.Integer >= PackageLength)
        {
            /* Allow package to be longer than the initializer list */

            PackageLength = (UINT32) PackageLengthOp->Asl.Value.Integer;
        }
        else
        {
            /*
             * Initializer list is longer than the package length. This
             * is an error as per the ACPI spec.
             */
            AslError (ASL_ERROR, ASL_MSG_LIST_LENGTH,
                PackageLengthOp->Asl.Next, NULL);
        }
    }

    if (PackageLengthOp->Asl.ParseOpcode == PARSEOP_DEFAULT_ARG)
    {
        /*
         * This is the case if the PackageLength was left empty - Package()
         * The package length becomes the length of the initializer list
         */
        Op->Asl.Child->Asl.ParseOpcode = PARSEOP_INTEGER;
        Op->Asl.Child->Asl.Value.Integer = PackageLength;

        /* Set the AML opcode */

        (void) OpcSetOptimalIntegerSize (Op->Asl.Child);
    }

    /* If not a variable-length package, check for a zero package length */

    if ((PackageLengthOp->Asl.ParseOpcode == PARSEOP_INTEGER)      ||
        (PackageLengthOp->Asl.ParseOpcode == PARSEOP_QWORDCONST)   ||
        (PackageLengthOp->Asl.ParseOpcode == PARSEOP_DEFAULT_ARG))
    {
        if (!PackageLength)
        {