cpuioaccess.asm

来自「EFI BIOS是Intel提出的下一代的BIOS标准。这里上传的Edk源代码是」· 汇编 代码 · 共 62 行

  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