From c1d82295759710ca0b408edba374468efdada891 Mon Sep 17 00:00:00 2001
From: Jordan Justen <jordan.l.justen@intel.com>
Date: Mon, 30 May 2016 18:52:00 -0700
Subject: [PATCH] MdePkg BaseLib: Convert X64/DisableCache.asm to NASM

The BaseTools/Scripts/ConvertMasmToNasm.py script was used to convert
X64/DisableCache.asm to X64/DisableCache.nasm

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
---
 MdePkg/Library/BaseLib/BaseLib.inf           |  2 +
 MdePkg/Library/BaseLib/X64/DisableCache.nasm | 43 ++++++++++++++++++++
 2 files changed, 45 insertions(+)
 create mode 100644 MdePkg/Library/BaseLib/X64/DisableCache.nasm

diff --git a/MdePkg/Library/BaseLib/BaseLib.inf b/MdePkg/Library/BaseLib/BaseLib.inf
index 896e7ba521..51e310303d 100644
--- a/MdePkg/Library/BaseLib/BaseLib.inf
+++ b/MdePkg/Library/BaseLib/BaseLib.inf
@@ -441,6 +441,7 @@
   X64/SwitchStack.asm
   X64/EnableCache.nasm
   X64/EnableCache.asm
+  X64/DisableCache.nasm
   X64/DisableCache.asm
 
   X64/CpuBreakpoint.c | MSFT 
@@ -623,6 +624,7 @@
   X64/CpuIdEx.S | GCC 
   X64/EnableCache.nasm| GCC
   X64/EnableCache.S | GCC
+  X64/DisableCache.nasm| GCC
   X64/DisableCache.S | GCC
   X64/RdRand.S | GCC
   ChkStkGcc.c  | GCC 
diff --git a/MdePkg/Library/BaseLib/X64/DisableCache.nasm b/MdePkg/Library/BaseLib/X64/DisableCache.nasm
new file mode 100644
index 0000000000..36cd8897ab
--- /dev/null
+++ b/MdePkg/Library/BaseLib/X64/DisableCache.nasm
@@ -0,0 +1,43 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+; This program and the accompanying materials
+; are licensed and made available under the terms and conditions of the BSD License
+; which accompanies this distribution.  The full text of the license may be found at
+; http://opensource.org/licenses/bsd-license.php.
+;
+; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+;
+; Module Name:
+;
+;   DisableCache.Asm
+;
+; Abstract:
+;
+;   Set the CD bit of CR0 to 1, clear the NW bit of CR0 to 0, and flush all caches with a
+;   WBINVD instruction.
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+    DEFAULT REL
+    SECTION .text
+
+;------------------------------------------------------------------------------
+; VOID
+; EFIAPI
+; AsmDisableCache (
+;   VOID
+;   );
+;------------------------------------------------------------------------------
+global ASM_PFX(AsmDisableCache)
+ASM_PFX(AsmDisableCache):
+    mov     rax, cr0
+    bts     rax, 30
+    btr     rax, 29
+    mov     cr0, rax
+    wbinvd
+    ret
+