[RFC PATCH v4 03/12] MdePkg/Include: add StandaloneMmServicesTableLib header file

[Jagadeesh Ujja <jagadeesh.ujja@arm.com>]

Some of the existing DXE drivers can be refactored to execute within
the Standalone MM execution environment as well. Allow such drivers to
get access to the Standalone MM services tables

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jagadeesh Ujja <jagadeesh.ujja@arm.com>
---
 MdePkg/Include/Library/StandaloneMmServicesTableLib.h | 45 ++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/MdePkg/Include/Library/StandaloneMmServicesTableLib.h b/MdePkg/Include/Library/StandaloneMmServicesTableLib.h
new file mode 100644
index 0000000..6e834a8
--- /dev/null
+++ b/MdePkg/Include/Library/StandaloneMmServicesTableLib.h
@@ -0,0 +1,45 @@
+/** @file
+  Provides a service to retrieve a pointer to the Standalone MM Services Table.
+  Only available to Standalone MM module types.
+
+Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2016 - 2018, ARM Limited. All rights reserved.<BR>
+
+This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution.  The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#ifndef __MM_SERVICES_TABLE_LIB_H__
+#define __MM_SERVICES_TABLE_LIB_H__
+
+#include <PiMm.h>
+#include <Library/DebugLib.h>
+
+
+extern EFI_MM_SYSTEM_TABLE         *gMmst;
+
+
+/**
+  This function allows the caller to determine if the driver is executing in
+  Standalone Management Mode(SMM).
+
+  This function returns TRUE if the driver is executing in SMM and FALSE if the
+  driver is not executing in SMM.
+
+  @retval  TRUE  The driver is executing in Standalone Management Mode (SMM).
+  @retval  FALSE The driver is not executing in Standalone Management Mode (SMM).
+
+**/
+BOOLEAN
+EFIAPI
+InMm (
+  VOID
+  );
+
+#endif
-- 
2.7.4