1 files changed, 97 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/MdePkg/Library/SmmLibNull/SmmLibNull.c b/src/VBox/Devices/EFI/Firmware/MdePkg/Library/SmmLibNull/SmmLibNull.c
new file mode 100644
index 00000000..d6eb279e
--- /dev/null
+++ b/src/VBox/Devices/EFI/Firmware/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;
+}