asllength.c

acpi tools for linux include acpiexec and acpixtract

    return (0);
}


/*******************************************************************************
 *
 * FUNCTION:    CgGenerateAmlOpcodeLength
 *
 * PARAMETERS:  Op          - Parse node whose AML opcode lengths will be
 *                            calculated
 *
 * RETURN:      None.
 *
 * DESCRIPTION: Calculate the AmlOpcodeLength, AmlPkgLenBytes, and AmlLength
 *              fields for this node.
 *
 ******************************************************************************/

static void
CgGenerateAmlOpcodeLength (
    ACPI_PARSE_OBJECT       *Op)
{

    /* Check for two-byte opcode */

    if (Op->Asl.AmlOpcode > 0x00FF)
    {
        Op->Asl.AmlOpcodeLength = 2;
    }
    else
    {
        Op->Asl.AmlOpcodeLength = 1;
    }

    /* Does this opcode have an associated "PackageLength" field? */

    Op->Asl.AmlPkgLenBytes = 0;
    if (Op->Asl.CompileFlags & NODE_AML_PACKAGE)
    {
        Op->Asl.AmlPkgLenBytes = CgGetPackageLenByteCount (
                                    Op, Op->Asl.AmlSubtreeLength);
    }

    /* Data opcode lengths are easy */

    switch (Op->Asl.AmlOpcode)
    {
    case AML_BYTE_OP:

        Op->Asl.AmlLength = 1;
        break;

    case AML_WORD_OP:

        Op->Asl.AmlLength = 2;
        break;

    case AML_DWORD_OP:

        Op->Asl.AmlLength = 4;
        break;

    case AML_QWORD_OP:

        Op->Asl.AmlLength = 8;
        break;

    default:
        /* All data opcodes must be above */
        break;
    }
}


/*******************************************************************************
 *
 * FUNCTION:    CgGenerateAmlLengths
 *
 * PARAMETERS:  Op        - Parse node
 *
 * RETURN:      None.
 *
 * DESCRIPTION: Generate internal length fields based on the AML opcode or
 *              parse opcode.
 *
 ******************************************************************************/

void
CgGenerateAmlLengths (
    ACPI_PARSE_OBJECT       *Op)
{
    char                    *Buffer;
    ACPI_STATUS             Status;


    switch (Op->Asl.AmlOpcode)
    {
    case AML_RAW_DATA_BYTE:

        Op->Asl.AmlOpcodeLength = 0;
        Op->Asl.AmlLength = 1;
        return;

    case AML_RAW_DATA_WORD:

        Op->Asl.AmlOpcodeLength = 0;
        Op->Asl.AmlLength = 2;
        return;

    case AML_RAW_DATA_DWORD:

        Op->Asl.AmlOpcodeLength = 0;
        Op->Asl.AmlLength = 4;
        return;

    case AML_RAW_DATA_QWORD:

        Op->Asl.AmlOpcodeLength = 0;
        Op->Asl.AmlLength = 8;
        return;

    case AML_RAW_DATA_BUFFER:

        /* Aml length is/was set by creator */

        Op->Asl.AmlOpcodeLength = 0;
        return;

    case AML_RAW_DATA_CHAIN:

        /* Aml length is/was set by creator */

        Op->Asl.AmlOpcodeLength = 0;
        return;

    default:
        break;
    }

    switch (Op->Asl.ParseOpcode)
    {
    case PARSEOP_DEFINITIONBLOCK:

        Gbl_TableLength = sizeof (ACPI_TABLE_HEADER) +
                            Op->Asl.AmlSubtreeLength;
        break;

    case PARSEOP_NAMESEG:

        Op->Asl.AmlOpcodeLength = 0;
        Op->Asl.AmlLength = 4;
        Op->Asl.ExternalName = Op->Asl.Value.String;
        break;

    case PARSEOP_NAMESTRING:
    case PARSEOP_METHODCALL:

        if (Op->Asl.CompileFlags & NODE_NAME_INTERNALIZED)
        {
            break;
        }

        Op->Asl.AmlOpcodeLength = 0;
        Status = UtInternalizeName (Op->Asl.Value.String, &Buffer);
        if (ACPI_FAILURE (Status))
        {
            DbgPrint (ASL_DEBUG_OUTPUT,
                "Failure from internalize name %X\n", Status);
            break;
        }

        Op->Asl.ExternalName = Op->Asl.Value.String;
        Op->Asl.Value.String = Buffer;
        Op->Asl.CompileFlags |= NODE_NAME_INTERNALIZED;

        Op->Asl.AmlLength = strlen (Buffer);

        /*
         * Check for single backslash reference to root,
         * make it a null terminated string in the AML
         */
        if (Op->Asl.AmlLength == 1)
        {
            Op->Asl.AmlLength = 2;
        }
        break;

    case PARSEOP_STRING_LITERAL:

        Op->Asl.AmlOpcodeLength = 1;

        /* Get null terminator */

        Op->Asl.AmlLength = strlen (Op->Asl.Value.String) + 1;
        break;

    case PARSEOP_PACKAGE_LENGTH:

        Op->Asl.AmlOpcodeLength = 0;
        Op->Asl.AmlPkgLenBytes = CgGetPackageLenByteCount (Op,
                                    (UINT32) Op->Asl.Value.Integer);
        break;

    case PARSEOP_RAW_DATA:

        Op->Asl.AmlOpcodeLength = 0;
        break;

    case PARSEOP_DEFAULT_ARG:
    case PARSEOP_EXTERNAL:
    case PARSEOP_INCLUDE:
    case PARSEOP_INCLUDE_END:

        /* Ignore the "default arg" nodes, they are extraneous at this point */

        break;

    default:

        CgGenerateAmlOpcodeLength (Op);
        break;
    }
}


#ifdef ACPI_OBSOLETE_FUNCTIONS
/*******************************************************************************
 *
 * FUNCTION:    LnAdjustLengthToRoot
 *
 * PARAMETERS:  Op      - Node whose Length was changed
 *
 * RETURN:      None.
 *
 * DESCRIPTION: Change the Subtree length of the given node, and bubble the
 *              change all the way up to the root node.  This allows for
 *              last second changes to a package length (for example, if the
 *              package length encoding gets shorter or longer.)
 *
 ******************************************************************************/

void
LnAdjustLengthToRoot (
    ACPI_PARSE_OBJECT       *SubtreeOp,
    UINT32                  LengthDelta)
{
    ACPI_PARSE_OBJECT       *Op;


    /* Adjust all subtree lengths up to the root */

    Op = SubtreeOp->Asl.Parent;
    while (Op)
    {
        Op->Asl.AmlSubtreeLength -= LengthDelta;
        Op = Op->Asl.Parent;
    }

    /* Adjust the global table length */

    Gbl_TableLength -= LengthDelta;
}
#endif