diff options
Diffstat (limited to 'DuetPkg/DxeIpl/Ia32/CpuIoAccess.asm')
| -rw-r--r-- | DuetPkg/DxeIpl/Ia32/CpuIoAccess.asm | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/DuetPkg/DxeIpl/Ia32/CpuIoAccess.asm b/DuetPkg/DxeIpl/Ia32/CpuIoAccess.asm new file mode 100644 index 0000000000..00a80ef75b --- /dev/null +++ b/DuetPkg/DxeIpl/Ia32/CpuIoAccess.asm @@ -0,0 +1,62 @@ + title CpuIoAccess.asm
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006, 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
+;
+;------------------------------------------------------------------------------
+
+ .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
+
+
+;------------------------------------------------------------------------------
+; 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
+
+
+END
\ No newline at end of file |