MdePkg/Library/BaseIoLibIntrinsic/X64/IoFifo.nasm

   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     DEFAULT REL
  17     SECTION .text
  18
  19 ;------------------------------------------------------------------------------
  20 ;  VOID
  21 ;  EFIAPI
  22 ;  IoReadFifo8 (
  23 ;    IN  UINTN                 Port,              // rcx
  24 ;    IN  UINTN                 Size,              // rdx
  25 ;    OUT VOID                  *Buffer            // r8
  26 ;    );
  27 ;------------------------------------------------------------------------------
  28 global ASM_PFX(IoReadFifo8)
  29 ASM_PFX(IoReadFifo8):
  30     cld
  31     xchg    rcx, rdx
  32     xchg    rdi, r8             ; rdi: buffer address; r8: save rdi
  33 rep insb
  34     mov     rdi, r8             ; restore rdi
  35     ret
  36
  37 ;------------------------------------------------------------------------------
  38 ;  VOID
  39 ;  EFIAPI
  40 ;  IoReadFifo16 (
  41 ;    IN  UINTN                 Port,              // rcx
  42 ;    IN  UINTN                 Size,              // rdx
  43 ;    OUT VOID                  *Buffer            // r8
  44 ;    );
  45 ;------------------------------------------------------------------------------
  46 global ASM_PFX(IoReadFifo16)
  47 ASM_PFX(IoReadFifo16):
  48     cld
  49     xchg    rcx, rdx
  50     xchg    rdi, r8             ; rdi: buffer address; r8: save rdi
  51 rep insw
  52     mov     rdi, r8             ; restore rdi
  53     ret
  54
  55 ;------------------------------------------------------------------------------
  56 ;  VOID
  57 ;  EFIAPI
  58 ;  IoReadFifo32 (
  59 ;    IN  UINTN                 Port,              // rcx
  60 ;    IN  UINTN                 Size,              // rdx
  61 ;    OUT VOID                  *Buffer            // r8
  62 ;    );
  63 ;------------------------------------------------------------------------------
  64 global ASM_PFX(IoReadFifo32)
  65 ASM_PFX(IoReadFifo32):
  66     cld
  67     xchg    rcx, rdx
  68     xchg    rdi, r8             ; rdi: buffer address; r8: save rdi
  69 rep insd
  70     mov     rdi, r8             ; restore rdi
  71     ret
  72
  73 ;------------------------------------------------------------------------------
  74 ;  VOID
  75 ;  EFIAPI
  76 ;  IoWriteFifo8 (
  77 ;    IN UINTN                  Port,              // rcx
  78 ;    IN UINTN                  Size,              // rdx
  79 ;    IN VOID                   *Buffer            // r8
  80 ;    );
  81 ;------------------------------------------------------------------------------
  82 global ASM_PFX(IoWriteFifo8)
  83 ASM_PFX(IoWriteFifo8):
  84     cld
  85     xchg    rcx, rdx
  86     xchg    rsi, r8             ; rsi: buffer address; r8: save rsi
  87 rep outsb
  88     mov     rsi, r8             ; restore rsi
  89     ret
  90
  91 ;------------------------------------------------------------------------------
  92 ;  VOID
  93 ;  EFIAPI
  94 ;  IoWriteFifo16 (
  95 ;    IN UINTN                  Port,              // rcx
  96 ;    IN UINTN                  Size,              // rdx
  97 ;    IN VOID                   *Buffer            // r8
  98 ;    );
  99 ;------------------------------------------------------------------------------
 100 global ASM_PFX(IoWriteFifo16)
 101 ASM_PFX(IoWriteFifo16):
 102     cld
 103     xchg    rcx, rdx
 104     xchg    rsi, r8             ; rsi: buffer address; r8: save rsi
 105 rep outsw
 106     mov     rsi, r8             ; restore rsi
 107     ret
 108
 109 ;------------------------------------------------------------------------------
 110 ;  VOID
 111 ;  EFIAPI
 112 ;  IoWriteFifo32 (
 113 ;    IN UINTN                  Port,              // rcx
 114 ;    IN UINTN                  Size,              // rdx
 115 ;    IN VOID                   *Buffer            // r8
 116 ;    );
 117 ;------------------------------------------------------------------------------
 118 global ASM_PFX(IoWriteFifo32)
 119 ASM_PFX(IoWriteFifo32):
 120     cld
 121     xchg    rcx, rdx
 122     xchg    rsi, r8             ; rsi: buffer address; r8: save rsi
 123 rep outsd
 124     mov     rsi, r8             ; restore rsi
 125     ret
 126