1 files changed, 47 insertions, 0 deletions
diff --git a/roms/edk2/StandaloneMmPkg/Library/VariableMmDependency/VariableMmDependency.c b/roms/edk2/StandaloneMmPkg/Library/VariableMmDependency/VariableMmDependency.c
new file mode 100644
index 000000000..1fef0a93b
--- /dev/null
+++ b/roms/edk2/StandaloneMmPkg/Library/VariableMmDependency/VariableMmDependency.c
@@ -0,0 +1,47 @@
+/** @file
+  Runtime DXE part corresponding to StanaloneMM variable module.
+
+This module installs variable arch protocol and variable write arch protocol
+to StandaloneMM runtime variable service.
+
+Copyright (c) 2019, ARM Ltd. All rights reserved.
+
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/DebugLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+
+/**
+  The constructor function installs variable arch protocol and variable
+  write arch protocol to StandaloneMM runtime variable service
+
+  @param  ImageHandle   The firmware allocated handle for the EFI image.
+  @param  SystemTable   A pointer to the Management mode System Table.
+
+  @retval EFI_SUCCESS   The constructor always returns EFI_SUCCESS.
+
+**/
+EFI_STATUS
+EFIAPI
+VariableMmDependencyLibConstructor (
+  IN EFI_HANDLE                           ImageHandle,
+  IN EFI_SYSTEM_TABLE                     *SystemTable
+  )
+{
+  EFI_STATUS            Status;
+  EFI_HANDLE            Handle;
+
+  Handle = NULL;
+  Status = gBS->InstallMultipleProtocolInterfaces (
+                  &Handle,
+                  &gEfiSmmVariableProtocolGuid,
+                  NULL,
+                  &gSmmVariableWriteGuid,
+                  NULL,
+                  NULL
+                  );
+  ASSERT_EFI_ERROR (Status);
+  return EFI_SUCCESS;
+}