3 files changed, 145 insertions, 0 deletions
diff --git a/roms/edk2/MdePkg/Library/SmmLibNull/SmmLibNull.c b/roms/edk2/MdePkg/Library/SmmLibNull/SmmLibNull.c
new file mode 100644
index 000000000..28c4f2fda
--- /dev/null
+++ b/roms/edk2/MdePkg/Library/SmmLibNull/SmmLibNull.c
@@ -0,0 +1,97 @@
+/** @file
+  NULL instance of SMM Library.
+
+  Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Base.h>
+#include <Library/SmmLib.h>
+
+/**
+  Triggers an SMI at boot time.
+
+  This function triggers a software SMM interrupt at boot time.
+
+**/
+VOID
+EFIAPI
+TriggerBootServiceSoftwareSmi (
+  VOID
+  )
+{
+  return;
+}
+
+
+/**
+  Triggers an SMI at run time.
+
+  This function triggers a software SMM interrupt at run time.
+
+**/
+VOID
+EFIAPI
+TriggerRuntimeSoftwareSmi (
+  VOID
+  )
+{
+  return;
+}
+
+
+
+/**
+  Test if a boot time software SMI happened.
+
+  This function tests if a software SMM interrupt happened. If a software SMM
+  interrupt happened and it was triggered at boot time, it returns TRUE. Otherwise,
+  it returns FALSE.
+
+  @retval TRUE   A software SMI triggered at boot time happened.
+  @retval FALSE  No software SMI happened or the software SMI was triggered at run time.
+
+**/
+BOOLEAN
+EFIAPI
+IsBootServiceSoftwareSmi (
+  VOID
+  )
+{
+  return FALSE;
+}
+
+
+/**
+  Test if a run time software SMI happened.
+
+  This function tests if a software SMM interrupt happened. If a software SMM
+  interrupt happened and it was triggered at run time, it returns TRUE. Otherwise,
+  it returns FALSE.
+
+  @retval TRUE   A software SMI triggered at run time happened.
+  @retval FALSE  No software SMI happened or the software SMI was triggered at boot time.
+
+**/
+BOOLEAN
+EFIAPI
+IsRuntimeSoftwareSmi (
+  VOID
+  )
+{
+  return FALSE;
+}
+
+/**
+  Clear APM SMI Status Bit; Set the EOS bit.
+
+**/
+VOID
+EFIAPI
+ClearSmi (
+  VOID
+  )
+{
+  return;
+}
diff --git a/roms/edk2/MdePkg/Library/SmmLibNull/SmmLibNull.inf b/roms/edk2/MdePkg/Library/SmmLibNull/SmmLibNull.inf
new file mode 100644
index 000000000..0b7e491db
--- /dev/null
+++ b/roms/edk2/MdePkg/Library/SmmLibNull/SmmLibNull.inf
@@ -0,0 +1,32 @@
+## @file
+# NULL instance of SMM Library.
+#
+#  Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = SmmLibNull
+  MODULE_UNI_FILE                = SmmLibNull.uni
+  FILE_GUID                      = DDADFC93-FBC5-4389-B20F-EC99E4A6AE52
+  MODULE_TYPE                    = BASE
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = SmmLib
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64 EBC
+#
+
+[Sources]
+  SmmLibNull.c
+
+
+[Packages]
+  MdePkg/MdePkg.dec
+
diff --git a/roms/edk2/MdePkg/Library/SmmLibNull/SmmLibNull.uni b/roms/edk2/MdePkg/Library/SmmLibNull/SmmLibNull.uni
new file mode 100644
index 000000000..0468efa3c
--- /dev/null
+++ b/roms/edk2/MdePkg/Library/SmmLibNull/SmmLibNull.uni
@@ -0,0 +1,16 @@
+// /** @file
+// NULL instance of SMM Library.
+//
+// NULL instance of SMM Library.
+//
+// Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>
+//
+// SPDX-License-Identifier: BSD-2-Clause-Patent
+//
+// **/
+
+
+#string STR_MODULE_ABSTRACT             #language en-US "NULL instance of SMM Library"
+
+#string STR_MODULE_DESCRIPTION          #language en-US "NULL instance of SMM Library."
+