excreate.c

acpi tools for linux include acpiexec and acpixtract

    /* Create the new mutex object */

    ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_MUTEX);
    if (!ObjDesc)
    {
        Status = AE_NO_MEMORY;
        goto Cleanup;
    }

    /* Create the actual OS Mutex */

    Status = AcpiOsCreateMutex (&ObjDesc->Mutex.OsMutex);
    if (ACPI_FAILURE (Status))
    {
        goto Cleanup;
    }

    /* Init object and attach to NS node */

    ObjDesc->Mutex.SyncLevel = (UINT8) WalkState->Operands[1]->Integer.Value;
    ObjDesc->Mutex.Node = (ACPI_NAMESPACE_NODE *) WalkState->Operands[0];

    Status = AcpiNsAttachObject (ObjDesc->Mutex.Node, ObjDesc, ACPI_TYPE_MUTEX);


Cleanup:
    /*
     * Remove local reference to the object (on error, will cause deletion
     * of both object and semaphore if present.)
     */
    AcpiUtRemoveReference (ObjDesc);
    return_ACPI_STATUS (Status);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiExCreateRegion
 *
 * PARAMETERS:  AmlStart            - Pointer to the region declaration AML
 *              AmlLength           - Max length of the declaration AML
 *              RegionSpace         - SpaceID for the region
 *              WalkState           - Current state
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Create a new operation region object
 *
 ******************************************************************************/

ACPI_STATUS
AcpiExCreateRegion (
    UINT8                   *AmlStart,
    UINT32                  AmlLength,
    UINT8                   RegionSpace,
    ACPI_WALK_STATE         *WalkState)
{
    ACPI_STATUS             Status;
    ACPI_OPERAND_OBJECT     *ObjDesc;
    ACPI_NAMESPACE_NODE     *Node;
    ACPI_OPERAND_OBJECT     *RegionObj2;


    ACPI_FUNCTION_TRACE (ExCreateRegion);


    /* Get the Namespace Node */

    Node = WalkState->Op->Common.Node;

    /*
     * If the region object is already attached to this node,
     * just return
     */
    if (AcpiNsGetAttachedObject (Node))
    {
        return_ACPI_STATUS (AE_OK);
    }

    /*
     * Space ID must be one of the predefined IDs, or in the user-defined
     * range
     */
    if ((RegionSpace >= ACPI_NUM_PREDEFINED_REGIONS) &&
        (RegionSpace < ACPI_USER_REGION_BEGIN))
    {
        ACPI_ERROR ((AE_INFO, "Invalid AddressSpace type %X", RegionSpace));
        return_ACPI_STATUS (AE_AML_INVALID_SPACE_ID);
    }

    ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "Region Type - %s (%X)\n",
        AcpiUtGetRegionName (RegionSpace), RegionSpace));

    /* Create the region descriptor */

    ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_REGION);
    if (!ObjDesc)
    {
        Status = AE_NO_MEMORY;
        goto Cleanup;
    }

    /*
     * Remember location in AML stream of address & length
     * operands since they need to be evaluated at run time.
     */
    RegionObj2 = ObjDesc->Common.NextObject;
    RegionObj2->Extra.AmlStart = AmlStart;
    RegionObj2->Extra.AmlLength = AmlLength;

    /* Init the region from the operands */

    ObjDesc->Region.SpaceId = RegionSpace;
    ObjDesc->Region.Address = 0;
    ObjDesc->Region.Length = 0;
    ObjDesc->Region.Node = Node;

    /* Install the new region object in the parent Node */

    Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_REGION);


Cleanup:

    /* Remove local reference to the object */

    AcpiUtRemoveReference (ObjDesc);
    return_ACPI_STATUS (Status);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiExCreateProcessor
 *
 * PARAMETERS:  WalkState           - Current state
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Create a new processor object and populate the fields
 *
 *              Processor (Name[0], CpuID[1], PblockAddr[2], PblockLength[3])
 *
 ******************************************************************************/

ACPI_STATUS
AcpiExCreateProcessor (
    ACPI_WALK_STATE         *WalkState)
{
    ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
    ACPI_OPERAND_OBJECT     *ObjDesc;
    ACPI_STATUS             Status;


    ACPI_FUNCTION_TRACE_PTR (ExCreateProcessor, WalkState);


    /* Create the processor object */

    ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_PROCESSOR);
    if (!ObjDesc)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    /* Initialize the processor object from the operands */

    ObjDesc->Processor.ProcId = (UINT8) Operand[1]->Integer.Value;
    ObjDesc->Processor.Length = (UINT8) Operand[3]->Integer.Value;
    ObjDesc->Processor.Address = (ACPI_IO_ADDRESS) Operand[2]->Integer.Value;

    /* Install the processor object in the parent Node */

    Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0],
                    ObjDesc, ACPI_TYPE_PROCESSOR);

    /* Remove local reference to the object */

    AcpiUtRemoveReference (ObjDesc);
    return_ACPI_STATUS (Status);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiExCreatePowerResource
 *
 * PARAMETERS:  WalkState           - Current state
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Create a new PowerResource object and populate the fields
 *
 *              PowerResource (Name[0], SystemLevel[1], ResourceOrder[2])
 *
 ******************************************************************************/

ACPI_STATUS
AcpiExCreatePowerResource (
    ACPI_WALK_STATE         *WalkState)
{
    ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
    ACPI_STATUS             Status;
    ACPI_OPERAND_OBJECT     *ObjDesc;


    ACPI_FUNCTION_TRACE_PTR (ExCreatePowerResource, WalkState);


    /* Create the power resource object */

    ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_POWER);
    if (!ObjDesc)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    /* Initialize the power object from the operands */

    ObjDesc->PowerResource.SystemLevel = (UINT8) Operand[1]->Integer.Value;
    ObjDesc->PowerResource.ResourceOrder = (UINT16) Operand[2]->Integer.Value;

    /* Install the  power resource object in the parent Node */

    Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0],
                    ObjDesc, ACPI_TYPE_POWER);

    /* Remove local reference to the object */

    AcpiUtRemoveReference (ObjDesc);
    return_ACPI_STATUS (Status);
}
#endif


/*******************************************************************************
 *
 * FUNCTION:    AcpiExCreateMethod
 *
 * PARAMETERS:  AmlStart        - First byte of the method's AML
 *              AmlLength       - AML byte count for this method
 *              WalkState       - Current state
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Create a new method object
 *
 ******************************************************************************/

ACPI_STATUS
AcpiExCreateMethod (
    UINT8                   *AmlStart,
    UINT32                  AmlLength,
    ACPI_WALK_STATE         *WalkState)
{
    ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];
    ACPI_OPERAND_OBJECT     *ObjDesc;
    ACPI_STATUS             Status;
    UINT8                   MethodFlags;


    ACPI_FUNCTION_TRACE_PTR (ExCreateMethod, WalkState);


    /* Create a new method object */

    ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_METHOD);
    if (!ObjDesc)
    {
       Status = AE_NO_MEMORY;
       goto Exit;
    }

    /* Save the method's AML pointer and length  */

    ObjDesc->Method.AmlStart = AmlStart;
    ObjDesc->Method.AmlLength = AmlLength;

    /*
     * Disassemble the method flags. Split off the Arg Count
     * for efficiency
     */
    MethodFlags = (UINT8) Operand[1]->Integer.Value;

    ObjDesc->Method.MethodFlags = (UINT8) (MethodFlags & ~AML_METHOD_ARG_COUNT);
    ObjDesc->Method.ParamCount = (UINT8) (MethodFlags & AML_METHOD_ARG_COUNT);

    /*
     * Get the SyncLevel. If method is serialized, a mutex will be
     * created for this method when it is parsed.
     */
    if (MethodFlags & AML_METHOD_SERIALIZED)
    {
        /*
         * ACPI 1.0: SyncLevel = 0
         * ACPI 2.0: SyncLevel = SyncLevel in method declaration
         */
        ObjDesc->Method.SyncLevel = (UINT8)
            ((MethodFlags & AML_METHOD_SYNCH_LEVEL) >> 4);
    }

    /* Attach the new object to the method Node */

    Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0],
                    ObjDesc, ACPI_TYPE_METHOD);

    /* Remove local reference to the object */

    AcpiUtRemoveReference (ObjDesc);

Exit:
    /* Remove a reference to the operand */

    AcpiUtRemoveReference (Operand[1]);
    return_ACPI_STATUS (Status);
}