MdePkg/Library/UefiDevicePathLib/DevicePathUtilitiesStandaloneMm.c

   1 /** @file
   2   Device Path services. The thing to remember is device paths are built out of
   3   nodes. The device path is terminated by an end node that is length
   4   sizeof(EFI_DEVICE_PATH_PROTOCOL). That would be why there is sizeof(EFI_DEVICE_PATH_PROTOCOL)
   5   all over this file.
   6
   7   The only place where multi-instance device paths are supported is in
   8   environment varibles. Multi-instance device paths should never be placed
   9   on a Handle.
  10
  11   Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
  12   Copyright (c) Microsoft Corporation.
  13   SPDX-License-Identifier: BSD-2-Clause-Patent
  14
  15 **/
  16
  17 #include "UefiDevicePathLib.h"
  18
  19 /**
  20   Retrieves the device path protocol from a handle.
  21
  22   This function returns the device path protocol from the handle specified by Handle.
  23   If Handle is NULL or Handle does not contain a device path protocol, then NULL
  24   is returned.
  25
  26   @param  Handle                     The handle from which to retrieve the device
  27                                      path protocol.
  28
  29   @return The device path protocol from the handle specified by Handle.
  30
  31 **/
  32 EFI_DEVICE_PATH_PROTOCOL *
  33 EFIAPI
  34 DevicePathFromHandle (
  35   IN EFI_HANDLE  Handle
  36   )
  37 {
  38   return NULL;
  39 }