--- /dev/null
+;------------------------------------------------------------------------------ ;\r
+; Copyright (c) 2018, Intel Corporation. All rights reserved.<BR>\r
+; This program and the accompanying materials\r
+; are licensed and made available under the terms and conditions of the BSD License\r
+; which accompanies this distribution. The full text of the license may be found at\r
+; http://opensource.org/licenses/bsd-license.php.\r
+;\r
+; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+;\r
+; Module Name:\r
+;\r
+; Lfence.nasm\r
+;\r
+; Abstract:\r
+;\r
+; Performs a serializing operation on all load-from-memory instructions that\r
+; were issued prior to the call of this function.\r
+;\r
+; Notes:\r
+;\r
+;------------------------------------------------------------------------------\r
+\r
+ SECTION .text\r
+\r
+;------------------------------------------------------------------------------\r
+; VOID\r
+; EFIAPI\r
+; AsmLfence (\r
+; VOID\r
+; );\r
+;------------------------------------------------------------------------------\r
+global ASM_PFX(AsmLfence)\r
+ASM_PFX(AsmLfence):\r
+ lfence\r
+ ret\r