+STATIC
+EFI_STATUS
+InternalFindFdtByGuid (
+ IN OUT EFI_DEVICE_PATH **FdtDevicePath,
+ IN CONST EFI_GUID *FdtGuid
+ )
+{
+ MEDIA_FW_VOL_FILEPATH_DEVICE_PATH FileDevicePath;
+ EFI_HANDLE *HandleBuffer;
+ UINTN HandleCount;
+ UINTN Index;
+ EFI_FIRMWARE_VOLUME2_PROTOCOL *FvProtocol;
+ EFI_GUID NameGuid;
+ UINTN Size;
+ VOID *Key;
+ EFI_FV_FILETYPE FileType;
+ EFI_FV_FILE_ATTRIBUTES Attributes;
+ EFI_DEVICE_PATH *FvDevicePath;
+ EFI_STATUS Status;
+
+ if (FdtGuid == NULL) {
+ return EFI_NOT_FOUND;
+ }
+
+ EfiInitializeFwVolDevicepathNode (&FileDevicePath, FdtGuid);
+
+ HandleBuffer = NULL;
+ Status = gBS->LocateHandleBuffer (
+ ByProtocol,
+ &gEfiFirmwareVolume2ProtocolGuid,
+ NULL,
+ &HandleCount,
+ &HandleBuffer
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ for (Index = 0; Index < HandleCount; Index++) {
+ Status = gBS->HandleProtocol (
+ HandleBuffer[Index],
+ &gEfiFirmwareVolume2ProtocolGuid,
+ (VOID **) &FvProtocol
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ // Allocate Key
+ Key = AllocatePool (FvProtocol->KeySize);
+ ASSERT (Key != NULL);
+ ZeroMem (Key, FvProtocol->KeySize);
+
+ do {
+ FileType = EFI_FV_FILETYPE_RAW;
+ Status = FvProtocol->GetNextFile (FvProtocol, Key, &FileType, &NameGuid, &Attributes, &Size);
+ if (Status == EFI_NOT_FOUND) {
+ break;
+ }
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Check whether this file is the one we are looking for. If so,
+ // create a device path for it and return it to the caller.
+ //
+ if (CompareGuid (&NameGuid, FdtGuid)) {
+ Status = gBS->HandleProtocol (HandleBuffer[Index], &gEfiDevicePathProtocolGuid, (VOID **)&FvDevicePath);
+ if (!EFI_ERROR (Status)) {
+ *FdtDevicePath = AppendDevicePathNode (FvDevicePath,
+ (EFI_DEVICE_PATH_PROTOCOL *)&FileDevicePath);
+ }
+ goto Done;
+ }
+ } while (TRUE);
+ FreePool (Key);
+ }
+
+ if (Index == HandleCount) {
+ Status = EFI_NOT_FOUND;
+ }
+ return Status;
+
+Done:
+ FreePool (Key);
+ return Status;
+}
+