PcAtChipsetPkg/PciHostBridgeDxe/X64/IoFifo.S

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