adisasm.c

acpi tools for linux include acpiexec and acpixtract

    ACPI_PARSE_OBJECT       *SearchOp;
    ACPI_PARSE_OBJECT       *StartOp;
    UINT32                  BaseAmlOffset;
    ACPI_PARSE_OBJECT       *ExtraOp;


    ACPI_FUNCTION_TRACE (AdDeferredParse);


    fprintf (stderr, ".");

    if (!Aml || !AmlLength)
    {
        return_ACPI_STATUS (AE_OK);
    }

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Parsing %s [%4.4s]\n",
        Op->Common.AmlOpName, (char *) &Op->Named.Name));

    WalkState = AcpiDsCreateWalkState (0, Op, NULL, NULL);
    if (!WalkState)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    Status = AcpiDsInitAmlWalk (WalkState, Op, NULL, Aml,
                    AmlLength, NULL, ACPI_IMODE_LOAD_PASS1);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Parse the method */

    WalkState->ParseFlags &= ~ACPI_PARSE_DELETE_TREE;
    WalkState->ParseFlags |= ACPI_PARSE_DISASSEMBLE;
    Status = AcpiPsParseAml (WalkState);

    /*
     * We need to update all of the Aml offsets, since the parser thought
     * that the method began at offset zero.  In reality, it began somewhere
     * within the ACPI table, at the BaseAmlOffset.  Walk the entire tree that
     * was just created and update the AmlOffset in each Op
     */
    BaseAmlOffset = (Op->Common.Value.Arg)->Common.AmlOffset + 1;
    StartOp = (Op->Common.Value.Arg)->Common.Next;
    SearchOp = StartOp;

    /* Walk the parse tree */

    while (SearchOp)
    {
        SearchOp->Common.AmlOffset += BaseAmlOffset;
        SearchOp = AcpiPsGetDepthNext (StartOp, SearchOp);
    }

    /*
     * Link the newly parsed subtree into the main parse tree
     */
    switch (Op->Common.AmlOpcode)
    {
    case AML_BUFFER_OP:
    case AML_PACKAGE_OP:
    case AML_VAR_PACKAGE_OP:

        switch (Op->Common.AmlOpcode)
        {
        case AML_PACKAGE_OP:
            ExtraOp = Op->Common.Value.Arg;
            ExtraOp = ExtraOp->Common.Next;
            Op->Common.Value.Arg = ExtraOp->Common.Value.Arg;
            break;

        case AML_VAR_PACKAGE_OP:
        case AML_BUFFER_OP:
        default:
            ExtraOp = Op->Common.Value.Arg;
            Op->Common.Value.Arg = ExtraOp->Common.Value.Arg;
            break;
        }

        /* Must point all parents to the main tree */

        StartOp = Op;
        SearchOp = StartOp;
        while (SearchOp)
        {
            if (SearchOp->Common.Parent == ExtraOp)
            {
                SearchOp->Common.Parent = Op;
            }
            SearchOp = AcpiPsGetDepthNext (StartOp, SearchOp);
        }
        break;

    default:
        break;
    }

    return_ACPI_STATUS (AE_OK);
}


/******************************************************************************
 *
 * FUNCTION:    AdParseDeferredOps
 *
 * PARAMETERS:  Root            - Root of the parse tree
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Parse the deferred opcodes (Methods, regions, etc.)
 *
 *****************************************************************************/

ACPI_STATUS
AdParseDeferredOps (
    ACPI_PARSE_OBJECT       *Root)
{
    ACPI_PARSE_OBJECT       *Op = Root;
    ACPI_STATUS             Status = AE_OK;
    const ACPI_OPCODE_INFO  *OpInfo;


    ACPI_FUNCTION_NAME (AdParseDeferredOps);
    fprintf (stderr, "Parsing Deferred Opcodes (Methods/Buffers/Packages/Regions)\n");

    while (Op)
    {
        OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
        if (!(OpInfo->Flags & AML_DEFER))
        {
            Op = AcpiPsGetDepthNext (Root, Op);
            continue;
        }

        switch (Op->Common.AmlOpcode)
        {
        case AML_METHOD_OP:
        case AML_BUFFER_OP:
        case AML_PACKAGE_OP:
        case AML_VAR_PACKAGE_OP:

            Status = AdDeferredParse (Op, Op->Named.Data, Op->Named.Length);
            if (ACPI_FAILURE (Status))
            {
                return_ACPI_STATUS (Status);
            }
            break;

        case AML_REGION_OP:
        case AML_CREATE_QWORD_FIELD_OP:
        case AML_CREATE_DWORD_FIELD_OP:
        case AML_CREATE_WORD_FIELD_OP:
        case AML_CREATE_BYTE_FIELD_OP:
        case AML_CREATE_BIT_FIELD_OP:
        case AML_CREATE_FIELD_OP:
        case AML_BANK_FIELD_OP:

            /* Nothing to do in these cases */

            break;

        default:
            ACPI_ERROR ((AE_INFO, "Unhandled deferred opcode [%s]",
                Op->Common.AmlOpName));
            break;
        }

        Op = AcpiPsGetDepthNext (Root, Op);
    }

    fprintf (stderr, "\n");
    return Status;
}


/******************************************************************************
 *
 * FUNCTION:    AdGetLocalTables
 *
 * PARAMETERS:  Filename        - Not used
 *              GetAllTables    - TRUE if all tables are desired
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Get the ACPI tables from either memory or a file
 *
 *****************************************************************************/

ACPI_STATUS
AdGetLocalTables (
    char                    *Filename,
    BOOLEAN                 GetAllTables)
{
    ACPI_STATUS             Status;
    ACPI_TABLE_HEADER       TableHeader;
    ACPI_TABLE_HEADER       *NewTable;
    UINT32                  NumTables;
    UINT32                  PointerSize;
    ACPI_NATIVE_UINT        TableIndex;


    if (GetAllTables)
    {
        ACPI_MOVE_32_TO_32 (TableHeader.Signature, ACPI_SIG_RSDT);
        AcpiOsTableOverride (&TableHeader, &NewTable);
        if (!NewTable)
        {
            fprintf (stderr, "Could not obtain RSDT\n");
            return AE_NO_ACPI_TABLES;
        }

        if (ACPI_COMPARE_NAME (NewTable->Signature, ACPI_SIG_RSDT))
        {
            PointerSize = sizeof (UINT32);
        }
        else
        {
            PointerSize = sizeof (UINT64);
        }

        /*
         * Determine the number of tables pointed to by the RSDT/XSDT.
         * This is defined by the ACPI Specification to be the number of
         * pointers contained within the RSDT/XSDT.  The size of the pointers
         * is architecture-dependent.
         */
        NumTables = (NewTable->Length - sizeof (ACPI_TABLE_HEADER)) / PointerSize;
        AcpiOsPrintf ("There are %d tables defined in the %4.4s\n\n",
            NumTables, NewTable->Signature);

        /* Get the FADT */

        ACPI_MOVE_32_TO_32 (TableHeader.Signature, ACPI_SIG_FADT);
        AcpiOsTableOverride (&TableHeader, &NewTable);
        if (NewTable)
        {
            AdWriteTable (NewTable, NewTable->Length,
                ACPI_SIG_FADT, NewTable->OemTableId);
        }
        AcpiOsPrintf ("\n");

        /* Don't bother with FACS, it is usually all zeros */
    }

    /* Always get the DSDT */

    ACPI_MOVE_32_TO_32 (TableHeader.Signature, ACPI_SIG_DSDT);
    AcpiOsTableOverride (&TableHeader, &NewTable);
    if (NewTable)
    {
        AdWriteTable (NewTable, NewTable->Length,
            ACPI_SIG_DSDT, NewTable->OemTableId);

        /* Store DSDT in the Table Manager */

        Status = AcpiTbStoreTable (0, NewTable, NewTable->Length,
                    0, &TableIndex);
    }
    else
    {
        fprintf (stderr, "Could not obtain DSDT\n");
        return AE_NO_ACPI_TABLES;
    }

#if 0
    /* TBD: Future implementation */

    AcpiOsPrintf ("\n");

    /* Get all SSDTs */

    ACPI_MOVE_32_TO_32 (TableHeader.Signature, ACPI_SIG_SSDT);
    do
    {
        NewTable = NULL;
        Status = AcpiOsTableOverride (&TableHeader, &NewTable);

    } while (NewTable);
#endif

    return AE_OK;
}


/******************************************************************************
 *
 * FUNCTION:    AdParseTable
 *
 * PARAMETERS:  Table           - Pointer to the raw table
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Parse the DSDT.
 *
 *****************************************************************************/

ACPI_STATUS
AdParseTable (
    ACPI_TABLE_HEADER       *Table,
    BOOLEAN                 LoadTable)
{
    ACPI_STATUS             Status = AE_OK;
    ACPI_WALK_STATE         *WalkState;
    UINT8                   *AmlStart;
    UINT32                  AmlLength;
    ACPI_NATIVE_UINT        TableIndex;


    if (!Table)
    {
        return AE_NOT_EXIST;
    }

    /* Pass 1:  Parse everything except control method bodies */

    fprintf (stderr, "Pass 1 parse of [%4.4s]\n", (char *) Table->Signature);

    AmlLength = Table->Length - sizeof (ACPI_TABLE_HEADER);
    AmlStart = ((UINT8 *) Table + sizeof (ACPI_TABLE_HEADER));

    /* Create the root object */

    AcpiGbl_ParseOpRoot = AcpiPsCreateScopeOp ();
    if (!AcpiGbl_ParseOpRoot)
    {
        return AE_NO_MEMORY;
    }

    /* Create and initialize a new walk state */

    WalkState = AcpiDsCreateWalkState (0,
                        AcpiGbl_ParseOpRoot, NULL, NULL);
    if (!WalkState)
    {
        return (AE_NO_MEMORY);
    }

    Status = AcpiDsInitAmlWalk (WalkState, AcpiGbl_ParseOpRoot,
                NULL, AmlStart, AmlLength, NULL, ACPI_IMODE_LOAD_PASS1);
    if (ACPI_FAILURE (Status))
    {
        return (Status);
    }

    WalkState->ParseFlags &= ~ACPI_PARSE_DELETE_TREE;
    WalkState->ParseFlags |= ACPI_PARSE_DISASSEMBLE;

    Status = AcpiPsParseAml (WalkState);
    if (ACPI_FAILURE (Status))
    {
        return Status;
    }

    /* Pass 2 */

    if (LoadTable)
    {
        Status = AcpiTbStoreTable ((ACPI_NATIVE_UINT) Table, Table,
                    Table->Length, ACPI_TABLE_ORIGIN_ALLOCATED, &TableIndex);
        if (ACPI_FAILURE (Status))
        {
            return Status;
        }
    }

    fprintf (stderr, "Pass 2 parse of [%4.4s]\n", (char *) Table->Signature);

    Status = AcpiNsOneCompleteParse (ACPI_IMODE_LOAD_PASS2, 0, NULL);
    if (ACPI_FAILURE (Status))
    {
        return (Status);
    }

    /* Pass 3: Parse control methods and link their parse trees into the main parse tree */

    Status = AdParseDeferredOps (AcpiGbl_ParseOpRoot);

    /* Process Resource Templates */

    AcpiDmFindResources (AcpiGbl_ParseOpRoot);

    fprintf (stderr, "Parsing completed\n");
    return AE_OK;
}