UefiCpuPkg/CpuIo2Dxe/X64/IoFifo.asm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
   4 ;
   5 ; This program and the accompanying materials are licensed and made available
   6 ; under the terms and conditions of the BSD License which accompanies this
   7 ; 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 ;------------------------------------------------------------------------------
  14
  15     .code
  16
  17 ;------------------------------------------------------------------------------
  18 ;  VOID
  19 ;  EFIAPI
  20 ;  IoReadFifo8 (
  21 ;    IN UINTN                  Port,              // rcx
  22 ;    IN UINTN                  Size,              // rdx
  23 ;    IN VOID                   *Buffer            // r8
  24 ;    );
  25 ;------------------------------------------------------------------------------
  26 IoReadFifo8 PROC
  27     cld
  28     xchg    rcx, rdx
  29     xchg    rdi, r8             ; rdi: buffer address; r8: save rdi
  30 rep insb
  31     mov     rdi, r8             ; restore rdi
  32     ret
  33 IoReadFifo8 ENDP
  34
  35 ;------------------------------------------------------------------------------
  36 ;  VOID
  37 ;  EFIAPI
  38 ;  IoReadFifo16 (
  39 ;    IN UINTN                  Port,              // rcx
  40 ;    IN UINTN                  Size,              // rdx
  41 ;    IN VOID                   *Buffer            // r8
  42 ;    );
  43 ;------------------------------------------------------------------------------
  44 IoReadFifo16 PROC
  45     cld
  46     xchg    rcx, rdx
  47     xchg    rdi, r8             ; rdi: buffer address; r8: save rdi
  48 rep insw
  49     mov     rdi, r8             ; restore rdi
  50     ret
  51 IoReadFifo16 ENDP
  52
  53 ;------------------------------------------------------------------------------
  54 ;  VOID
  55 ;  EFIAPI
  56 ;  IoReadFifo32 (
  57 ;    IN UINTN                  Port,              // rcx
  58 ;    IN UINTN                  Size,              // rdx
  59 ;    IN VOID                   *Buffer            // r8
  60 ;    );
  61 ;------------------------------------------------------------------------------
  62 IoReadFifo32 PROC
  63     cld
  64     xchg    rcx, rdx
  65     xchg    rdi, r8             ; rdi: buffer address; r8: save rdi
  66 rep insd
  67     mov     rdi, r8             ; restore rdi
  68     ret
  69 IoReadFifo32 ENDP
  70
  71 ;------------------------------------------------------------------------------
  72 ;  VOID
  73 ;  EFIAPI
  74 ;  IoWriteFifo8 (
  75 ;    IN UINTN                  Port,              // rcx
  76 ;    IN UINTN                  Size,              // rdx
  77 ;    IN VOID                   *Buffer            // r8
  78 ;    );
  79 ;------------------------------------------------------------------------------
  80 IoWriteFifo8 PROC
  81     cld
  82     xchg    rcx, rdx
  83     xchg    rsi, r8             ; rsi: buffer address; r8: save rsi
  84 rep outsb
  85     mov     rsi, r8             ; restore rsi
  86     ret
  87 IoWriteFifo8 ENDP
  88
  89 ;------------------------------------------------------------------------------
  90 ;  VOID
  91 ;  EFIAPI
  92 ;  IoWriteFifo16 (
  93 ;    IN UINTN                  Port,              // rcx
  94 ;    IN UINTN                  Size,              // rdx
  95 ;    IN VOID                   *Buffer            // r8
  96 ;    );
  97 ;------------------------------------------------------------------------------
  98 IoWriteFifo16 PROC
  99     cld
 100     xchg    rcx, rdx
 101     xchg    rsi, r8             ; rsi: buffer address; r8: save rsi
 102 rep outsw
 103     mov     rsi, r8             ; restore rsi
 104     ret
 105 IoWriteFifo16 ENDP
 106
 107 ;------------------------------------------------------------------------------
 108 ;  VOID
 109 ;  EFIAPI
 110 ;  IoWriteFifo32 (
 111 ;    IN UINTN                  Port,              // rcx
 112 ;    IN UINTN                  Size,              // rdx
 113 ;    IN VOID                   *Buffer            // r8
 114 ;    );
 115 ;------------------------------------------------------------------------------
 116 IoWriteFifo32 PROC
 117     cld
 118     xchg    rcx, rdx
 119     xchg    rsi, r8             ; rsi: buffer address; r8: save rsi
 120 rep outsd
 121     mov     rsi, r8             ; restore rsi
 122     ret
 123 IoWriteFifo32 ENDP
 124
 125     END
 126