1 files changed, 120 insertions, 0 deletions
diff --git a/DuetPkg/CpuIoDxe/Ia32/CpuIoAccess.asm b/DuetPkg/CpuIoDxe/Ia32/CpuIoAccess.asm
new file mode 100644
index 0000000000..07b14ea554
--- /dev/null
+++ b/DuetPkg/CpuIoDxe/Ia32/CpuIoAccess.asm
@@ -0,0 +1,120 @@
+  title   CpuIoAccess.asm
+;------------------------------------------------------------------------------
+;*
+;*   Copyright (c) 2005, 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 IA32 CPU IO operation
+;*  
+;------------------------------------------------------------------------------
+;
+;
+;------------------------------------------------------------------------------
+
+  .686
+  .MODEL FLAT,C
+  .CODE
+
+
+UINT8    TYPEDEF    BYTE
+UINT16   TYPEDEF    WORD
+UINT32   TYPEDEF    DWORD
+UINT64   TYPEDEF    QWORD
+UINTN    TYPEDEF    UINT32
+
+
+
+;------------------------------------------------------------------------------
+;  UINT8
+;  CpuIoRead8 (
+;    IN  UINT16  Port
+;    )
+;------------------------------------------------------------------------------
+CpuIoRead8 PROC    PUBLIC Port:UINT16
+    mov    dx,  Port
+    in     al,  dx
+    ret
+CpuIoRead8  ENDP
+
+;------------------------------------------------------------------------------
+;  UINT16
+;  CpuIoRead16 (
+;    IN  UINT16  Port
+;    )
+;------------------------------------------------------------------------------
+CpuIoRead16 PROC    PUBLIC Port:UINT16
+    mov    dx,  Port
+    in     ax,  dx
+    ret
+CpuIoRead16  ENDP
+
+;------------------------------------------------------------------------------
+;  UINT32
+;  CpuIoRead32 (
+;    IN  UINT16  Port
+;    )
+;------------------------------------------------------------------------------
+CpuIoRead32 PROC    PUBLIC Port:UINT16
+    mov   dx,  Port
+    in    eax, dx
+    ret
+CpuIoRead32  ENDP
+
+
+
+;------------------------------------------------------------------------------
+;  VOID
+;  CpuIoWrite8 (
+;    IN  UINT16  Port,
+;    IN  UINT32  Data
+;    )
+;------------------------------------------------------------------------------
+CpuIoWrite8 PROC    PUBLIC Port:UINT16, Data:UINT32
+    mov    eax, Data
+    mov    dx,  Port
+    out    dx,  al
+    ret
+CpuIoWrite8  ENDP
+
+
+;------------------------------------------------------------------------------
+;  VOID
+;  CpuIoWrite16 (
+;    IN  UINT16  Port,
+;    IN  UINT32  Data
+;    )
+;------------------------------------------------------------------------------
+CpuIoWrite16 PROC    PUBLIC Port:UINT16, Data:UINT32
+    mov    eax, Data
+    mov    dx,  Port
+    out    dx,  ax
+    ret
+CpuIoWrite16  ENDP
+
+
+;------------------------------------------------------------------------------
+;  VOID
+;  CpuIoWrite32 (
+;    IN  UINT16  Port,
+;    IN  UINT32  Data
+;    )
+;------------------------------------------------------------------------------
+CpuIoWrite32 PROC    PUBLIC Port:UINT16, Data:UINT32
+    mov    eax, Data
+    mov    dx,  Port
+    out    dx,  eax
+    ret
+CpuIoWrite32  ENDP
+
+
+END
+\ No newline at end of file