OvmfPkg/PciHostBridgeDxe/X64/IoFifo.S

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