MdeModulePkg/UefiBootManagerLib: Expose *GetLoadOptionBuffer() API

Expose EfiBootManagerGetLoadOptionBuffer() API.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>

MdeModulePkg/Include/Library/UefiBootManagerLib.h

@@ -1,7 +1,7 @@
 /** @file
   Provide Boot Manager related library APIs.
 
-Copyright (c) 2011 - 2015, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2011 - 2016, Intel Corporation. All rights reserved.<BR>
 (C) Copyright 2015-2016 Hewlett Packard Enterprise Development LP<BR>
 This program and the accompanying materials
 are licensed and made available under the terms and conditions of the BSD License
@@ -431,6 +431,27 @@ EfiBootManagerGetBootManagerMenu (
   EFI_BOOT_MANAGER_LOAD_OPTION *BootOption
   );
 
+
+/**
+  Get the load option by its device path.
+
+  @param FilePath  The device path pointing to a load option.
+                   It could be a short-form device path.
+  @param FullPath  Return the full device path of the load option after
+                   short-form device path expanding.
+                   Caller is responsible to free it.
+  @param FileSize  Return the load option size.
+
+  @return The load option buffer. Caller is responsible to free the memory.
+**/
+VOID *
+EFIAPI
+EfiBootManagerGetLoadOptionBuffer (
+  IN  EFI_DEVICE_PATH_PROTOCOL          *FilePath,
+  OUT EFI_DEVICE_PATH_PROTOCOL          **FullPath,
+  OUT UINTN                             *FileSize
+  );
+
 /**
   The function enumerates all the legacy boot options, creates them and 
   registers them in the BootOrder variable.