1 files changed, 52 insertions, 0 deletions
diff --git a/DuetPkg/DxeIpl/X64/CpuIoAccess.asm b/DuetPkg/DxeIpl/X64/CpuIoAccess.asm
new file mode 100644
index 0000000000..f1515e8c84
--- /dev/null
+++ b/DuetPkg/DxeIpl/X64/CpuIoAccess.asm
@@ -0,0 +1,52 @@
+  title   CpuIoAccess.asm
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006 - 2007, Intel Corporation                                                         
+; All rights reserved. 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:
+;   CpuIoAccess.asm
+; 
+; Abstract:
+;   CPU IO Abstraction
+;
+;------------------------------------------------------------------------------
+
+
+.code
+
+;------------------------------------------------------------------------------
+;  UINT8
+;  CpuIoRead8 (
+;    UINT16  Port   // rcx
+;    )
+;------------------------------------------------------------------------------
+CpuIoRead8 PROC        PUBLIC
+    xor   eax, eax
+    mov    dx, cx
+    in     al, dx
+    ret
+CpuIoRead8  ENDP
+
+;------------------------------------------------------------------------------
+;  VOID
+;  CpuIoWrite8 (
+;    UINT16  Port,    // rcx
+;    UINT32  Data     // rdx
+;    )
+;------------------------------------------------------------------------------
+CpuIoWrite8 PROC        PUBLIC
+	  mov   eax, edx
+    mov    dx, cx
+    out    dx, al
+    ret
+CpuIoWrite8  ENDP
+
+
+END