2 files changed, 61 insertions, 0 deletions
diff --git a/roms/edk2/IntelFsp2Pkg/Library/BaseCacheAsRamLibNull/BaseCacheAsRamLibNull.inf b/roms/edk2/IntelFsp2Pkg/Library/BaseCacheAsRamLibNull/BaseCacheAsRamLibNull.inf
new file mode 100644
index 000000000..0c0453254
--- /dev/null
+++ b/roms/edk2/IntelFsp2Pkg/Library/BaseCacheAsRamLibNull/BaseCacheAsRamLibNull.inf
@@ -0,0 +1,26 @@
+## @file
+#  NULL instance of Base cache as RAM.
+#
+#  Copyright (c) 2014 - 2017, Intel Corporation. All rights reserved.<BR>
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = BaseCacheAsRamLibNull
+  FILE_GUID                      = 630AEB10-2106-4234-9DB3-836A3663F50D
+  MODULE_TYPE                    = BASE
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = CacheAsRamLib
+
+[Sources.common]
+  DisableCacheAsRamNull.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  IntelFsp2Pkg/IntelFsp2Pkg.dec
+
+[LibraryClasses]
+
diff --git a/roms/edk2/IntelFsp2Pkg/Library/BaseCacheAsRamLibNull/DisableCacheAsRamNull.c b/roms/edk2/IntelFsp2Pkg/Library/BaseCacheAsRamLibNull/DisableCacheAsRamNull.c
new file mode 100644
index 000000000..78abb6d5d
--- /dev/null
+++ b/roms/edk2/IntelFsp2Pkg/Library/BaseCacheAsRamLibNull/DisableCacheAsRamNull.c
@@ -0,0 +1,35 @@
+/** @file
+
+  Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Uefi.h>
+#include <Library/BaseLib.h>
+#include <Library/CacheAsRamLib.h>
+
+/**
+  This function disable CAR.
+
+  @param[in] DisableCar       TRUE means use INVD, FALSE means use WBINVD
+
+**/
+VOID
+EFIAPI
+DisableCacheAsRam (
+  IN BOOLEAN                   DisableCar
+  )
+{
+  //
+  // Disable CAR
+  //
+
+  if (DisableCar) {
+    AsmInvd ();
+  } else {
+    AsmWbinvd();
+  }
+
+  return ;
+}