C++ AcpiUtInitializeBuffer函数代码示例

ACPI_STATUS
AcpiGetSystemInfo (
    ACPI_BUFFER             *OutBuffer)
{
    ACPI_SYSTEM_INFO        *InfoPtr;
    ACPI_STATUS             Status;


    ACPI_FUNCTION_TRACE (AcpiGetSystemInfo);


    /* Parameter validation */

    Status = AcpiUtValidateBuffer (OutBuffer);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Validate/Allocate/Clear caller buffer */

    Status = AcpiUtInitializeBuffer (OutBuffer, sizeof (ACPI_SYSTEM_INFO));
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /*
     * Populate the return buffer
     */
    InfoPtr = (ACPI_SYSTEM_INFO *) OutBuffer->Pointer;
    InfoPtr->AcpiCaVersion = ACPI_CA_VERSION;

    /* System flags (ACPI capabilities) */

    InfoPtr->Flags = ACPI_SYS_MODE_ACPI;

    /* Timer resolution - 24 or 32 bits  */

    if (AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER)
    {
        InfoPtr->TimerResolution = 24;
    }
    else
    {
        InfoPtr->TimerResolution = 32;
    }

    /* Clear the reserved fields */

    InfoPtr->Reserved1 = 0;
    InfoPtr->Reserved2 = 0;

    /* Current debug levels */

    InfoPtr->DebugLayer = AcpiDbgLayer;
    InfoPtr->DebugLevel = AcpiDbgLevel;

    return_ACPI_STATUS (AE_OK);
}

ACPI_STATUS
AcpiRsCreateResourceList (
    ACPI_OPERAND_OBJECT     *AmlBuffer,
    ACPI_BUFFER             *OutputBuffer)
{

    ACPI_STATUS             Status;
    UINT8                   *AmlStart;
    ACPI_SIZE               ListSizeNeeded = 0;
    UINT32                  AmlBufferLength;
    void                    *Resource;


    ACPI_FUNCTION_TRACE (RsCreateResourceList);


    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "AmlBuffer = %p\n",
        AmlBuffer));

    /* Params already validated, so we don't re-validate here */

    AmlBufferLength = AmlBuffer->Buffer.Length;
    AmlStart = AmlBuffer->Buffer.Pointer;

    /*
     * Pass the AmlBuffer into a module that can calculate
     * the buffer size needed for the linked list
     */
    Status = AcpiRsGetListLength (AmlStart, AmlBufferLength,
                &ListSizeNeeded);

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Status=%X ListSizeNeeded=%X\n",
        Status, (UINT32) ListSizeNeeded));
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Validate/Allocate/Clear caller buffer */

    Status = AcpiUtInitializeBuffer (OutputBuffer, ListSizeNeeded);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Do the conversion */

    Resource = OutputBuffer->Pointer;
    Status = AcpiUtWalkAmlResources (NULL, AmlStart, AmlBufferLength,
                AcpiRsConvertAmlToResources, &Resource);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "OutputBuffer %p Length %X\n",
            OutputBuffer->Pointer, (UINT32) OutputBuffer->Length));
    return_ACPI_STATUS (AE_OK);
}

static ACPI_STATUS
AcpiRsMatchVendorResource (
    ACPI_RESOURCE           *Resource,
    void                    *Context)
{
    ACPI_VENDOR_WALK_INFO       *Info = Context;
    ACPI_RESOURCE_VENDOR_TYPED  *Vendor;
    ACPI_BUFFER                 *Buffer;
    ACPI_STATUS                 Status;


    /* Ignore all descriptors except Vendor */

    if (Resource->Type != ACPI_RESOURCE_TYPE_VENDOR)
    {
        return (AE_OK);
    }

    Vendor = &Resource->Data.VendorTyped;

    /*
     * For a valid match, these conditions must hold:
     *
     * 1) Length of descriptor data must be at least as long as a UUID struct
     * 2) The UUID subtypes must match
     * 3) The UUID data must match
     */
    if ((Vendor->ByteLength < (ACPI_UUID_LENGTH + 1)) ||
        (Vendor->UuidSubtype != Info->Uuid->Subtype)  ||
        (ACPI_MEMCMP (Vendor->Uuid, Info->Uuid->Data, ACPI_UUID_LENGTH)))
    {
        return (AE_OK);
    }

    /* Validate/Allocate/Clear caller buffer */

    Buffer = Info->Buffer;
    Status = AcpiUtInitializeBuffer (Buffer, Resource->Length);
    if (ACPI_FAILURE (Status))
    {
        return (Status);
    }

    /* Found the correct resource, copy and return it */

    ACPI_MEMCPY (Buffer->Pointer, Resource, Resource->Length);
    Buffer->Length = Resource->Length;

    /* Found the desired descriptor, terminate resource walk */

    Info->Status = AE_OK;
    return (AE_CTRL_TERMINATE);
}

ACPI_STATUS
AcpiRsCreateAmlResources (
    ACPI_RESOURCE           *LinkedListBuffer,
    ACPI_BUFFER             *OutputBuffer)
{
    ACPI_STATUS             Status;
    ACPI_SIZE               AmlSizeNeeded = 0;


    ACPI_FUNCTION_TRACE (RsCreateAmlResources);


    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "LinkedListBuffer = %p\n",
        LinkedListBuffer));

    /*
     * Params already validated, so we don't re-validate here
     *
     * Pass the LinkedListBuffer into a module that calculates
     * the buffer size needed for the byte stream.
     */
    Status = AcpiRsGetAmlLength (LinkedListBuffer,
                &AmlSizeNeeded);

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "AmlSizeNeeded=%X, %s\n",
        (UINT32) AmlSizeNeeded, AcpiFormatException (Status)));
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Validate/Allocate/Clear caller buffer */

    Status = AcpiUtInitializeBuffer (OutputBuffer, AmlSizeNeeded);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Do the conversion */

    Status = AcpiRsConvertResourcesToAml (LinkedListBuffer, AmlSizeNeeded,
                    OutputBuffer->Pointer);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "OutputBuffer %p Length %X\n",
            OutputBuffer->Pointer, (UINT32) OutputBuffer->Length));
    return_ACPI_STATUS (AE_OK);
}

ACPI_STATUS
AcpiRsCreateAmlResources (
    ACPI_BUFFER             *ResourceList,
    ACPI_BUFFER             *OutputBuffer)
{
    ACPI_STATUS             Status;
    ACPI_SIZE               AmlSizeNeeded = 0;


    ACPI_FUNCTION_TRACE (RsCreateAmlResources);


    /* Params already validated, no need to re-validate here */

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "ResourceList Buffer = %p\n",
        ResourceList->Pointer));

    /* Get the buffer size needed for the AML byte stream */

    Status = AcpiRsGetAmlLength (ResourceList->Pointer,
                ResourceList->Length, &AmlSizeNeeded);

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "AmlSizeNeeded=%X, %s\n",
        (UINT32) AmlSizeNeeded, AcpiFormatException (Status)));
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Validate/Allocate/Clear caller buffer */

    Status = AcpiUtInitializeBuffer (OutputBuffer, AmlSizeNeeded);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Do the conversion */

    Status = AcpiRsConvertResourcesToAml (ResourceList->Pointer,
                AmlSizeNeeded, OutputBuffer->Pointer);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "OutputBuffer %p Length %X\n",
        OutputBuffer->Pointer, (UINT32) OutputBuffer->Length));
    return_ACPI_STATUS (AE_OK);
}

ACPI_STATUS
AcpiNsHandleToPathname (
    ACPI_HANDLE             TargetHandle,
    ACPI_BUFFER             *Buffer,
    BOOLEAN                 NoTrailing)
{
    ACPI_STATUS             Status;
    ACPI_NAMESPACE_NODE     *Node;
    ACPI_SIZE               RequiredSize;


    ACPI_FUNCTION_TRACE_PTR (NsHandleToPathname, TargetHandle);


    Node = AcpiNsValidateHandle (TargetHandle);
    if (!Node)
    {
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }

    /* Determine size required for the caller buffer */

    RequiredSize = AcpiNsBuildNormalizedPath (Node, NULL, 0, NoTrailing);
    if (!RequiredSize)
    {
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }

    /* Validate/Allocate/Clear caller buffer */

    Status = AcpiUtInitializeBuffer (Buffer, RequiredSize);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Build the path in the caller buffer */

    (void) AcpiNsBuildNormalizedPath (Node, Buffer->Pointer,
        RequiredSize, NoTrailing);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "%s [%X]\n",
        (char *) Buffer->Pointer, (UINT32) RequiredSize));
    return_ACPI_STATUS (AE_OK);
}

ACPI_STATUS
AcpiNsHandleToPathname (
    ACPI_HANDLE             TargetHandle,
    ACPI_BUFFER             *Buffer)
{
    ACPI_STATUS             Status;
    ACPI_NAMESPACE_NODE     *Node;
    ACPI_SIZE               RequiredSize;


    ACPI_FUNCTION_TRACE_PTR ("NsHandleToPathname", TargetHandle);


    Node = AcpiNsMapHandleToNode (TargetHandle);
    if (!Node)
    {
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }

    /* Determine size required for the caller buffer */

    RequiredSize = AcpiNsGetPathnameLength (Node);

    /* Validate/Allocate/Clear caller buffer */

    Status = AcpiUtInitializeBuffer (Buffer, RequiredSize);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Build the path in the caller buffer */

    AcpiNsBuildExternalPath (Node, RequiredSize, Buffer->Pointer);

    ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "%s [%X] \n", (char *) Buffer->Pointer, (UINT32) RequiredSize));
    return_ACPI_STATUS (AE_OK);
}

ACPI_STATUS
AcpiNsHandleToName (
    ACPI_HANDLE             TargetHandle,
    ACPI_BUFFER             *Buffer)
{
    ACPI_STATUS             Status;
    ACPI_NAMESPACE_NODE     *Node;
    const char              *NodeName;


    ACPI_FUNCTION_TRACE_PTR (NsHandleToName, TargetHandle);


    Node = AcpiNsValidateHandle (TargetHandle);
    if (!Node)
    {
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }

    /* Validate/Allocate/Clear caller buffer */

    Status = AcpiUtInitializeBuffer (Buffer, ACPI_PATH_SEGMENT_LENGTH);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Just copy the ACPI name from the Node and zero terminate it */

    NodeName = AcpiUtGetNodeName (Node);
    ACPI_MOVE_NAME (Buffer->Pointer, NodeName);
    ((char *) Buffer->Pointer) [ACPI_NAME_SIZE] = 0;

    ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "%4.4s\n", (char *) Buffer->Pointer));
    return_ACPI_STATUS (AE_OK);
}

//.........这里部分代码省略.........
    /* Now we can evaluate the object */

    Status = AcpiNsEvaluate (Info);

    /*
     * If we are expecting a return value, and all went well above,
     * copy the return value to an external object.
     */
    if (ReturnBuffer)
    {
        if (!Info->ReturnObject)
        {
            ReturnBuffer->Length = 0;
        }
        else
        {
            if (ACPI_GET_DESCRIPTOR_TYPE (Info->ReturnObject) ==
                ACPI_DESC_TYPE_NAMED)
            {
                /*
                 * If we received a NS Node as a return object, this means that
                 * the object we are evaluating has nothing interesting to
                 * return (such as a mutex, etc.)  We return an error because
                 * these types are essentially unsupported by this interface.
                 * We don't check up front because this makes it easier to add
                 * support for various types at a later date if necessary.
                 */
                Status = AE_TYPE;
                Info->ReturnObject = NULL;   /* No need to delete a NS Node */
                ReturnBuffer->Length = 0;
            }

            if (ACPI_SUCCESS (Status))
            {
                /* Dereference Index and RefOf references */

                AcpiNsResolveReferences (Info);

                /* Get the size of the returned object */

                Status = AcpiUtGetObjectSize (Info->ReturnObject,
                    &BufferSpaceNeeded);
                if (ACPI_SUCCESS (Status))
                {
                    /* Validate/Allocate/Clear caller buffer */

                    Status = AcpiUtInitializeBuffer (ReturnBuffer,
                        BufferSpaceNeeded);
                    if (ACPI_FAILURE (Status))
                    {
                        /*
                         * Caller's buffer is too small or a new one can't
                         * be allocated
                         */
                        ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
                            "Needed buffer size %X, %s\n",
                            (UINT32) BufferSpaceNeeded,
                            AcpiFormatException (Status)));
                    }
                    else
                    {
                        /* We have enough space for the object, build it */

                        Status = AcpiUtCopyIobjectToEobject (
                            Info->ReturnObject, ReturnBuffer);
                    }
                }
            }
        }
    }

    if (Info->ReturnObject)
    {
        /*
         * Delete the internal return object. NOTE: Interpreter must be
         * locked to avoid race condition.
         */
        AcpiExEnterInterpreter ();

        /* Remove one reference on the return object (should delete it) */

        AcpiUtRemoveReference (Info->ReturnObject);
        AcpiExExitInterpreter ();
    }


Cleanup:

    /* Free the input parameter list (if we created one) */

    if (Info->Parameters)
    {
        /* Free the allocated parameter block */

        AcpiUtDeleteInternalObjectList (Info->Parameters);
    }

    ACPI_FREE (Info);
    return_ACPI_STATUS (Status);
}

ACPI_STATUS
AcpiRsCreatePciRoutingTable (
    ACPI_OPERAND_OBJECT     *PackageObject,
    ACPI_BUFFER             *OutputBuffer)
{
    UINT8                   *Buffer;
    ACPI_OPERAND_OBJECT     **TopObjectList;
    ACPI_OPERAND_OBJECT     **SubObjectList;
    ACPI_OPERAND_OBJECT     *ObjDesc;
    ACPI_SIZE               BufferSizeNeeded = 0;
    UINT32                  NumberOfElements;
    UINT32                  Index;
    ACPI_PCI_ROUTING_TABLE  *UserPrt;
    ACPI_NAMESPACE_NODE     *Node;
    ACPI_STATUS             Status;
    ACPI_BUFFER             PathBuffer;


    ACPI_FUNCTION_TRACE (RsCreatePciRoutingTable);


    /* Params already validated, so we don't re-validate here */

    /* Get the required buffer length */

    Status = AcpiRsGetPciRoutingTableLength (PackageObject,
                &BufferSizeNeeded);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "BufferSizeNeeded = %X\n",
        (UINT32) BufferSizeNeeded));

    /* Validate/Allocate/Clear caller buffer */

    Status = AcpiUtInitializeBuffer (OutputBuffer, BufferSizeNeeded);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /*
     * Loop through the ACPI_INTERNAL_OBJECTS - Each object should be a
     * package that in turn contains an UINT64 Address, a UINT8 Pin,
     * a Name, and a UINT8 SourceIndex.
     */
    TopObjectList    = PackageObject->Package.Elements;
    NumberOfElements = PackageObject->Package.Count;
    Buffer           = OutputBuffer->Pointer;
    UserPrt          = ACPI_CAST_PTR (ACPI_PCI_ROUTING_TABLE, Buffer);

    for (Index = 0; Index < NumberOfElements; Index++)
    {
        /*
         * Point UserPrt past this current structure
         *
         * NOTE: On the first iteration, UserPrt->Length will
         * be zero because we cleared the return buffer earlier
         */
        Buffer += UserPrt->Length;
        UserPrt = ACPI_CAST_PTR (ACPI_PCI_ROUTING_TABLE, Buffer);

        /*
         * Fill in the Length field with the information we have at this point.
         * The minus four is to subtract the size of the UINT8 Source[4] member
         * because it is added below.
         */
        UserPrt->Length = (sizeof (ACPI_PCI_ROUTING_TABLE) - 4);

        /* Each element of the top-level package must also be a package */

        if ((*TopObjectList)->Common.Type != ACPI_TYPE_PACKAGE)
        {
            ACPI_ERROR ((AE_INFO,
                "(PRT[%u]) Need sub-package, found %s",
                Index, AcpiUtGetObjectTypeName (*TopObjectList)));
            return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
        }

        /* Each sub-package must be of length 4 */

        if ((*TopObjectList)->Package.Count != 4)
        {
            ACPI_ERROR ((AE_INFO,
                "(PRT[%u]) Need package of length 4, found length %u",
                Index, (*TopObjectList)->Package.Count));
            return_ACPI_STATUS (AE_AML_PACKAGE_LIMIT);
        }

        /*
         * Dereference the sub-package.
         * The SubObjectList will now point to an array of the four IRQ
         * elements: [Address, Pin, Source, SourceIndex]
         */
        SubObjectList = (*TopObjectList)->Package.Elements;

        /* 1) First subobject: Dereference the PRT.Address */

//.........这里部分代码省略.........

//.........这里部分代码省略.........

        Status = AcpiNsEvaluate (Info);
    }

    /*
     * If we are expecting a return value, and all went well above,
     * copy the return value to an external object.
     */
    if (ReturnBuffer)
    {
        if (!Info->ReturnObject)
        {
            ReturnBuffer->Length = 0;
        }
        else
        {
            if (ACPI_GET_DESCRIPTOR_TYPE (Info->ReturnObject) ==
                ACPI_DESC_TYPE_NAMED)
            {
                /*
                 * If we received a NS Node as a return object, this means that
                 * the object we are evaluating has nothing interesting to
                 * return (such as a mutex, etc.)  We return an error because
                 * these types are essentially unsupported by this interface.
                 * We don't check up front because this makes it easier to add
                 * support for various types at a later date if necessary.
                 */
                Status = AE_TYPE;
                Info->ReturnObject = NULL;   /* No need to delete a NS Node */
                ReturnBuffer->Length = 0;
            }

            if (ACPI_SUCCESS (Status))
            {
                /* Dereference Index and RefOf references */

                AcpiNsResolveReferences (Info);

                /* Get the size of the returned object */

                Status = AcpiUtGetObjectSize (Info->ReturnObject,
                            &BufferSpaceNeeded);
                if (ACPI_SUCCESS (Status))
                {
                    /* Validate/Allocate/Clear caller buffer */

                    Status = AcpiUtInitializeBuffer (ReturnBuffer,
                                BufferSpaceNeeded);
                    if (ACPI_FAILURE (Status))
                    {
                        /*
                         * Caller's buffer is too small or a new one can't
                         * be allocated
                         */
                        ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
                            "Needed buffer size %X, %s\n",
                            (UINT32) BufferSpaceNeeded,
                            AcpiFormatException (Status)));
                    }
                    else
                    {
                        /* We have enough space for the object, build it */

                        Status = AcpiUtCopyIobjectToEobject (Info->ReturnObject,
                                    ReturnBuffer);
                    }
                }
            }
        }
    }

    if (Info->ReturnObject)
    {
        /*
         * Delete the internal return object. NOTE: Interpreter must be
         * locked to avoid race condition.
         */
        AcpiExEnterInterpreter ();

        /* Remove one reference on the return object (should delete it) */

        AcpiUtRemoveReference (Info->ReturnObject);
        AcpiExExitInterpreter ();
    }


Cleanup:

    /* Free the input parameter list (if we created one) */

    if (Info->Parameters)
    {
        /* Free the allocated parameter block */

        AcpiUtDeleteInternalObjectList (Info->Parameters);
    }

    ACPI_FREE (Info);
    return_ACPI_STATUS (Status);
}

//.........这里部分代码省略.........
    Info->Name  = Node->Name.Integer;
    Info->Valid = 0;

    Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
    if (ACPI_FAILURE (Status))
    {
        goto Cleanup;
    }

    /* If not a device, we are all done */

    if (Info->Type == ACPI_TYPE_DEVICE)
    {
        /*
         * Get extra info for ACPI Devices objects only:
         * Run the Device _HID, _UID, _CID, _STA, _ADR and _SxD methods.
         *
         * Note: none of these methods are required, so they may or may
         * not be present for this device.  The Info->Valid bitfield is used
         * to indicate which methods were found and ran successfully.
         */

        /* Execute the Device._HID method */

        Status = AcpiUtExecute_HID (Node, &Info->HardwareId);
        if (ACPI_SUCCESS (Status))
        {
            Info->Valid |= ACPI_VALID_HID;
        }

        /* Execute the Device._UID method */

        Status = AcpiUtExecute_UID (Node, &Info->UniqueId);
        if (ACPI_SUCCESS (Status))
        {
            Info->Valid |= ACPI_VALID_UID;
        }

        /* Execute the Device._CID method */

        Status = AcpiUtExecute_CID (Node, &CidList);
        if (ACPI_SUCCESS (Status))
        {
            Size += CidList->Size;
            Info->Valid |= ACPI_VALID_CID;
        }

        /* Execute the Device._STA method */

        Status = AcpiUtExecute_STA (Node, &Info->CurrentStatus);
        if (ACPI_SUCCESS (Status))
        {
            Info->Valid |= ACPI_VALID_STA;
        }

        /* Execute the Device._ADR method */

        Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR, Node,
                        &Info->Address);
        if (ACPI_SUCCESS (Status))
        {
            Info->Valid |= ACPI_VALID_ADR;
        }

        /* Execute the Device._SxD methods */

        Status = AcpiUtExecute_Sxds (Node, Info->HighestDstates);
        if (ACPI_SUCCESS (Status))
        {
            Info->Valid |= ACPI_VALID_SXDS;
        }
    }

    /* Validate/Allocate/Clear caller buffer */

    Status = AcpiUtInitializeBuffer (Buffer, Size);
    if (ACPI_FAILURE (Status))
    {
        goto Cleanup;
    }

    /* Populate the return buffer */

    ReturnInfo = Buffer->Pointer;
    ACPI_MEMCPY (ReturnInfo, Info, sizeof (ACPI_DEVICE_INFO));

    if (CidList)
    {
        ACPI_MEMCPY (&ReturnInfo->CompatibilityId, CidList, CidList->Size);
    }


Cleanup:
    ACPI_FREE (Info);
    if (CidList)
    {
        ACPI_FREE (CidList);
    }
    return (Status);
}

ACPI_STATUS
AcpiGetName (
    ACPI_HANDLE             Handle,
    UINT32                  NameType,
    ACPI_BUFFER             *Buffer)
{
    ACPI_STATUS             Status;
    ACPI_NAMESPACE_NODE     *Node;


    /* Parameter validation */

    if (NameType > ACPI_NAME_TYPE_MAX)
    {
        return (AE_BAD_PARAMETER);
    }

    Status = AcpiUtValidateBuffer (Buffer);
    if (ACPI_FAILURE (Status))
    {
        return (Status);
    }

    if (NameType == ACPI_FULL_PATHNAME)
    {
        /* Get the full pathname (From the namespace root) */

        Status = AcpiNsHandleToPathname (Handle, Buffer);
        return (Status);
    }

    /*
     * Wants the single segment ACPI name.
     * Validate handle and convert to a namespace Node
     */
    Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
    if (ACPI_FAILURE (Status))
    {
        return (Status);
    }

    Node = AcpiNsMapHandleToNode (Handle);
    if (!Node)
    {
        Status = AE_BAD_PARAMETER;
        goto UnlockAndExit;
    }

    /* Validate/Allocate/Clear caller buffer */

    Status = AcpiUtInitializeBuffer (Buffer, ACPI_PATH_SEGMENT_LENGTH);
    if (ACPI_FAILURE (Status))
    {
        goto UnlockAndExit;
    }

    /* Just copy the ACPI name from the Node and zero terminate it */

    ACPI_STRNCPY (Buffer->Pointer, AcpiUtGetNodeName (Node),
                ACPI_NAME_SIZE);
    ((char *) Buffer->Pointer) [ACPI_NAME_SIZE] = 0;
    Status = AE_OK;


UnlockAndExit:

    (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
    return (Status);
}

ACPI_STATUS
AcpiGetTable (
    ACPI_TABLE_TYPE         TableType,
    UINT32                  Instance,
    ACPI_BUFFER             *RetBuffer)
{
    ACPI_TABLE_HEADER       *TblPtr;
    ACPI_STATUS             Status;
    ACPI_SIZE               TableLength;


    ACPI_FUNCTION_TRACE ("AcpiGetTable");


    /* Parameter validation */

    if (Instance == 0)
    {
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }

    Status = AcpiUtValidateBuffer (RetBuffer);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Check the table type and instance */

    if ((TableType > ACPI_TABLE_MAX)    ||
        (ACPI_IS_SINGLE_TABLE (AcpiGbl_AcpiTableData[TableType].Flags) &&
         Instance > 1))
    {
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }


    /* Get a pointer to the entire table */

    Status = AcpiTbGetTablePtr (TableType, Instance, &TblPtr);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /*
     * AcpiTbGetTablePtr will return a NULL pointer if the
     * table is not loaded.
     */
    if (TblPtr == NULL)
    {
        return_ACPI_STATUS (AE_NOT_EXIST);
    }

    /* Get the table length */

    if (TableType == ACPI_TABLE_RSDP)
    {
        /*
         *  RSD PTR is the only "table" without a header
         */
        TableLength = sizeof (RSDP_DESCRIPTOR);
    }
    else
    {
        TableLength = (ACPI_SIZE) TblPtr->Length;
    }

    /* Validate/Allocate/Clear caller buffer */

    Status = AcpiUtInitializeBuffer (RetBuffer, TableLength);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Copy the table to the buffer */

    ACPI_MEMCPY ((void *) RetBuffer->Pointer, (void *) TblPtr, TableLength);
    return_ACPI_STATUS (AE_OK);
}