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 120 行

  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