MdePkg/Library/BaseIoLibIntrinsic/X64/IoFifo.asm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
   4 ; Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
   5 ;
   6 ; This program and the accompanying materials are licensed and made available
   7 ; under the terms and conditions of the BSD License which accompanies this
   8 ; distribution.  The full text of the license may be found at
   9 ; http://opensource.org/licenses/bsd-license.php.
  10 ;
  11 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13 ;
  14 ;------------------------------------------------------------------------------
  15
  16     .code
  17
  18 ;------------------------------------------------------------------------------
  19 ;  VOID
  20 ;  EFIAPI
  21 ;  IoReadFifo8 (
  22 ;    IN  UINTN                 Port,              // rcx
  23 ;    IN  UINTN                 Size,              // rdx
  24 ;    OUT VOID                  *Buffer            // r8
  25 ;    );
  26 ;------------------------------------------------------------------------------
  27 IoReadFifo8 PROC
  28     cld
  29     xchg    rcx, rdx
  30     xchg    rdi, r8             ; rdi: buffer address; r8: save rdi
  31 rep insb
  32     mov     rdi, r8             ; restore rdi
  33     ret
  34 IoReadFifo8 ENDP
  35
  36 ;------------------------------------------------------------------------------
  37 ;  VOID
  38 ;  EFIAPI
  39 ;  IoReadFifo16 (
  40 ;    IN  UINTN                 Port,              // rcx
  41 ;    IN  UINTN                 Size,              // rdx
  42 ;    OUT VOID                  *Buffer            // r8
  43 ;    );
  44 ;------------------------------------------------------------------------------
  45 IoReadFifo16 PROC
  46     cld
  47     xchg    rcx, rdx
  48     xchg    rdi, r8             ; rdi: buffer address; r8: save rdi
  49 rep insw
  50     mov     rdi, r8             ; restore rdi
  51     ret
  52 IoReadFifo16 ENDP
  53
  54 ;------------------------------------------------------------------------------
  55 ;  VOID
  56 ;  EFIAPI
  57 ;  IoReadFifo32 (
  58 ;    IN  UINTN                 Port,              // rcx
  59 ;    IN  UINTN                 Size,              // rdx
  60 ;    OUT VOID                  *Buffer            // r8
  61 ;    );
  62 ;------------------------------------------------------------------------------
  63 IoReadFifo32 PROC
  64     cld
  65     xchg    rcx, rdx
  66     xchg    rdi, r8             ; rdi: buffer address; r8: save rdi
  67 rep insd
  68     mov     rdi, r8             ; restore rdi
  69     ret
  70 IoReadFifo32 ENDP
  71
  72 ;------------------------------------------------------------------------------
  73 ;  VOID
  74 ;  EFIAPI
  75 ;  IoWriteFifo8 (
  76 ;    IN UINTN                  Port,              // rcx
  77 ;    IN UINTN                  Size,              // rdx
  78 ;    IN VOID                   *Buffer            // r8
  79 ;    );
  80 ;------------------------------------------------------------------------------
  81 IoWriteFifo8 PROC
  82     cld
  83     xchg    rcx, rdx
  84     xchg    rsi, r8             ; rsi: buffer address; r8: save rsi
  85 rep outsb
  86     mov     rsi, r8             ; restore rsi
  87     ret
  88 IoWriteFifo8 ENDP
  89
  90 ;------------------------------------------------------------------------------
  91 ;  VOID
  92 ;  EFIAPI
  93 ;  IoWriteFifo16 (
  94 ;    IN UINTN                  Port,              // rcx
  95 ;    IN UINTN                  Size,              // rdx
  96 ;    IN VOID                   *Buffer            // r8
  97 ;    );
  98 ;------------------------------------------------------------------------------
  99 IoWriteFifo16 PROC
 100     cld
 101     xchg    rcx, rdx
 102     xchg    rsi, r8             ; rsi: buffer address; r8: save rsi
 103 rep outsw
 104     mov     rsi, r8             ; restore rsi
 105     ret
 106 IoWriteFifo16 ENDP
 107
 108 ;------------------------------------------------------------------------------
 109 ;  VOID
 110 ;  EFIAPI
 111 ;  IoWriteFifo32 (
 112 ;    IN UINTN                  Port,              // rcx
 113 ;    IN UINTN                  Size,              // rdx
 114 ;    IN VOID                   *Buffer            // r8
 115 ;    );
 116 ;------------------------------------------------------------------------------
 117 IoWriteFifo32 PROC
 118     cld
 119     xchg    rcx, rdx
 120     xchg    rsi, r8             ; rsi: buffer address; r8: save rsi
 121 rep outsd
 122     mov     rsi, r8             ; restore rsi
 123     ret
 124 IoWriteFifo32 ENDP
 125
 126     END
 127