DuetPkg/CpuIoDxe/Ia32/CpuIoAccess.asm

   1   title   CpuIoAccess.asm
   2 ;------------------------------------------------------------------------------
   3 ;*
   4 ;*   Copyright (c) 2005, Intel Corporation
   5 ;*   All rights reserved. This program and the accompanying materials
   6 ;*   are licensed and made available under the terms and conditions of the BSD License
   7 ;*   which accompanies this distribution.  The full text of the license may be found at
   8 ;*   http://opensource.org/licenses/bsd-license.php
   9 ;*
  10 ;*   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 ;*   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12 ;*
  13 ;*   Module Name:
  14 ;*     CpuIoAccess.asm
  15 ;*
  16 ;*   Abstract:
  17 ;*     Supports IA32 CPU IO operation
  18 ;*
  19 ;------------------------------------------------------------------------------
  20 ;
  21 ;
  22 ;------------------------------------------------------------------------------
  23
  24   .686
  25   .MODEL FLAT,C
  26   .CODE
  27
  28
  29 UINT8    TYPEDEF    BYTE
  30 UINT16   TYPEDEF    WORD
  31 UINT32   TYPEDEF    DWORD
  32 UINT64   TYPEDEF    QWORD
  33 UINTN    TYPEDEF    UINT32
  34
  35
  36
  37 ;------------------------------------------------------------------------------
  38 ;  UINT8
  39 ;  CpuIoRead8 (
  40 ;    IN  UINT16  Port
  41 ;    )
  42 ;------------------------------------------------------------------------------
  43 CpuIoRead8 PROC    PUBLIC Port:UINT16
  44     mov    dx,  Port
  45     in     al,  dx
  46     ret
  47 CpuIoRead8  ENDP
  48
  49 ;------------------------------------------------------------------------------
  50 ;  UINT16
  51 ;  CpuIoRead16 (
  52 ;    IN  UINT16  Port
  53 ;    )
  54 ;------------------------------------------------------------------------------
  55 CpuIoRead16 PROC    PUBLIC Port:UINT16
  56     mov    dx,  Port
  57     in     ax,  dx
  58     ret
  59 CpuIoRead16  ENDP
  60
  61 ;------------------------------------------------------------------------------
  62 ;  UINT32
  63 ;  CpuIoRead32 (
  64 ;    IN  UINT16  Port
  65 ;    )
  66 ;------------------------------------------------------------------------------
  67 CpuIoRead32 PROC    PUBLIC Port:UINT16
  68     mov   dx,  Port
  69     in    eax, dx
  70     ret
  71 CpuIoRead32  ENDP
  72
  73
  74
  75 ;------------------------------------------------------------------------------
  76 ;  VOID
  77 ;  CpuIoWrite8 (
  78 ;    IN  UINT16  Port,
  79 ;    IN  UINT32  Data
  80 ;    )
  81 ;------------------------------------------------------------------------------
  82 CpuIoWrite8 PROC    PUBLIC Port:UINT16, Data:UINT32
  83     mov    eax, Data
  84     mov    dx,  Port
  85     out    dx,  al
  86     ret
  87 CpuIoWrite8  ENDP
  88
  89
  90 ;------------------------------------------------------------------------------
  91 ;  VOID
  92 ;  CpuIoWrite16 (
  93 ;    IN  UINT16  Port,
  94 ;    IN  UINT32  Data
  95 ;    )
  96 ;------------------------------------------------------------------------------
  97 CpuIoWrite16 PROC    PUBLIC Port:UINT16, Data:UINT32
  98     mov    eax, Data
  99     mov    dx,  Port
 100     out    dx,  ax
 101     ret
 102 CpuIoWrite16  ENDP
 103
 104
 105 ;------------------------------------------------------------------------------
 106 ;  VOID
 107 ;  CpuIoWrite32 (
 108 ;    IN  UINT16  Port,
 109 ;    IN  UINT32  Data
 110 ;    )
 111 ;------------------------------------------------------------------------------
 112 CpuIoWrite32 PROC    PUBLIC Port:UINT16, Data:UINT32
 113     mov    eax, Data
 114     mov    dx,  Port
 115     out    dx,  eax
 116     ret
 117 CpuIoWrite32  ENDP
 118
 119
 120 END