[PATCH] MdePkg/UefiDevicePathLib: reback the DevicePathUtilitiesStandaloneMm

[First Last <first.last@intel.com>]

From: Yanbo Huang <yanbo.huang@intel.com>

reback the DevicePathUtilitiesStandaloneMm to unblock the downstream sync

Signed-off-by: Yanbo Huang <yanbo.huang@intel.com>
CC: Michael D Kinney <michael.d.kinney@intel.com>
CC: Liming Gao <gaoliming@byosoft.com.cn>
CC: Zhiguang Liu <zhiguang.liu@intel.com>

---
 .../DevicePathUtilitiesStandaloneMm.c         | 39 ++++++++++
 .../UefiDevicePathLibStandaloneMm.inf         | 75 +++++++++++++++++++
 2 files changed, 114 insertions(+)
 create mode 100644 MdePkg/Library/UefiDevicePathLib/DevicePathUtilitiesStandaloneMm.c
 create mode 100644 MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibStandaloneMm.inf

diff --git a/MdePkg/Library/UefiDevicePathLib/DevicePathUtilitiesStandaloneMm.c b/MdePkg/Library/UefiDevicePathLib/DevicePathUtilitiesStandaloneMm.c
new file mode 100644
index 0000000000..096f835b90
--- /dev/null
+++ b/MdePkg/Library/UefiDevicePathLib/DevicePathUtilitiesStandaloneMm.c
@@ -0,0 +1,39 @@
+/** @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
+  )
+{
+  return NULL;
+}
diff --git a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibStandaloneMm.inf b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibStandaloneMm.inf
new file mode 100644
index 0000000000..23fedf38b7
--- /dev/null
+++ b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibStandaloneMm.inf
@@ -0,0 +1,75 @@
+## @file
+# Instance of Device Path Library based on Memory Allocation Library.
+#
+# Device Path Library that layers on top of the Memory Allocation Library.
+#
+# Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) Microsoft Corporation.
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = UefiDevicePathLib
+  MODULE_UNI_FILE                = UefiDevicePathLib.uni
+  FILE_GUID                      = D8E58437-44D3-4154-B7A7-EB794923EF12
+  MODULE_TYPE                    = MM_STANDALONE
+  PI_SPECIFICATION_VERSION       = 0x00010032
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = DevicePathLib | MM_STANDALONE MM_CORE_STANDALONE
+
+
+#
+#  VALID_ARCHITECTURES           = IA32 X64 EBC
+#
+
+[Sources]
+  DevicePathUtilities.c
+  DevicePathUtilitiesStandaloneMm.c
+  DevicePathToText.c
+  DevicePathFromText.c
+  UefiDevicePathLib.c
+  UefiDevicePathLib.h
+
+[Packages]
+  MdePkg/MdePkg.dec
+
+[LibraryClasses]
+  BaseLib
+  MemoryAllocationLib
+  DebugLib
+  BaseMemoryLib
+  PcdLib
+  PrintLib
+
+[Guids]
+  ## SOMETIMES_CONSUMES  ## GUID
+  gEfiVTUTF8Guid
+  ## SOMETIMES_CONSUMES  ## GUID
+  gEfiVT100Guid
+  ## SOMETIMES_CONSUMES  ## GUID
+  gEfiVT100PlusGuid
+  ## SOMETIMES_CONSUMES  ## GUID
+  gEfiPcAnsiGuid
+  ## SOMETIMES_CONSUMES  ## GUID
+  gEfiUartDevicePathGuid
+  ## SOMETIMES_CONSUMES  ## GUID
+  gEfiSasDevicePathGuid
+  ## SOMETIMES_CONSUMES  ## GUID
+  gEfiVirtualDiskGuid
+  ## SOMETIMES_CONSUMES  ## GUID
+  gEfiVirtualCdGuid
+  ## SOMETIMES_CONSUMES  ## GUID
+  gEfiPersistentVirtualDiskGuid
+  ## SOMETIMES_CONSUMES  ## GUID
+  gEfiPersistentVirtualCdGuid
+
+[Protocols]
+  gEfiDevicePathProtocolGuid                    ## SOMETIMES_CONSUMES
+  gEfiDebugPortProtocolGuid                     ## UNDEFINED
+
+[Pcd]
+  gEfiMdePkgTokenSpaceGuid.PcdMaximumDevicePathNodeCount    ## SOMETIMES_CONSUMES
-- 
2.31.1.windows.1