1 files changed, 111 insertions, 0 deletions
diff --git a/DuetPkg/CpuIoDxe/x64/CpuIoAccess.asm b/DuetPkg/CpuIoDxe/x64/CpuIoAccess.asm
new file mode 100644
index 0000000000..fa71762877
--- /dev/null
+++ b/DuetPkg/CpuIoDxe/x64/CpuIoAccess.asm
@@ -0,0 +1,111 @@
+  title   CpuIoAccess.asm
+
+;------------------------------------------------------------------------------
+;*
+;*   Copyright (c) 2005 - 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:
+;*    Supports x64 CPU IO operation
+;*
+;------------------------------------------------------------------------------
+;
+;   
+; 
+; Abstract:
+; 
+;   
+;------------------------------------------------------------------------------
+
+.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
+
+;------------------------------------------------------------------------------
+;  UINT16
+;  CpuIoRead16 (
+;    UINT16  Port   // rcx
+;    )
+;------------------------------------------------------------------------------
+CpuIoRead16 PROC        PUBLIC
+    xor   eax, eax
+    mov    dx, cx
+    in     ax, dx
+    ret
+CpuIoRead16  ENDP
+
+;------------------------------------------------------------------------------
+;  VOID
+;  CpuIoWrite16 (
+;    UINT16  Port,    // rcx
+;    UINT32  Data     // rdx
+;    )
+;------------------------------------------------------------------------------
+CpuIoWrite16 PROC        PUBLIC
+    mov   eax, edx
+    mov    dx, cx
+    out    dx, ax
+    ret
+CpuIoWrite16  ENDP
+
+;------------------------------------------------------------------------------
+;  UINT32
+;  CpuIoRead32 (
+;    UINT16  Port   // rcx
+;    )
+;------------------------------------------------------------------------------
+CpuIoRead32 PROC        PUBLIC
+    mov    dx, cx
+    in    eax, dx
+    ret
+CpuIoRead32  ENDP
+
+;------------------------------------------------------------------------------
+;  VOID
+;  CpuIoWrite32 (
+;    UINT16  Port,    // rcx
+;    UINT32  Data     // rdx
+;    )
+;------------------------------------------------------------------------------
+CpuIoWrite32 PROC        PUBLIC
+    mov   eax, edx
+    mov    dx, cx
+    out    dx, eax
+    ret
+CpuIoWrite32  ENDP
+
+END