1 files changed, 51 insertions, 0 deletions
diff --git a/MdePkg/Library/UefiDevicePathLib/DevicePathUtilitiesDxeSmm.c b/MdePkg/Library/UefiDevicePathLib/DevicePathUtilitiesDxeSmm.c
new file mode 100644
index 0000000000..7f3b6076ef
--- /dev/null
+++ b/MdePkg/Library/UefiDevicePathLib/DevicePathUtilitiesDxeSmm.c
@@ -0,0 +1,51 @@
+/** @file
+  Device Path services. The thing to remember is device paths are built out of
+  nodes. The device path is terminated by an end node that is length
+  sizeof(EFI_DEVICE_PATH_PROTOCOL). That would be why there is sizeof(EFI_DEVICE_PATH_PROTOCOL)
+  all over this file.
+
+  The only place where multi-instance device paths are supported is in
+  environment varibles. Multi-instance device paths should never be placed
+  on a Handle.
+
+  Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) Microsoft Corporation.
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "UefiDevicePathLib.h"
+
+
+/**
+  Retrieves the device path protocol from a handle.
+
+  This function returns the device path protocol from the handle specified by Handle.
+  If Handle is NULL or Handle does not contain a device path protocol, then NULL
+  is returned.
+
+  @param  Handle                     The handle from which to retrieve the device
+                                     path protocol.
+
+  @return The device path protocol from the handle specified by Handle.
+
+**/
+EFI_DEVICE_PATH_PROTOCOL *
+EFIAPI
+DevicePathFromHandle (
+  IN EFI_HANDLE                      Handle
+  )
+{
+  EFI_DEVICE_PATH_PROTOCOL  *DevicePath;
+  EFI_STATUS                Status;
+
+  Status = gBS->HandleProtocol (
+                  Handle,
+                  &gEfiDevicePathProtocolGuid,
+                  (VOID *) &DevicePath
+                  );
+  if (EFI_ERROR (Status)) {
+    DevicePath = NULL;
+  }
+  return DevicePath;
+}