f1078f2088eade9aade2eb52bc987e3473e52312
[mirror_edk2.git] / OvmfPkg / Library / QemuFwCfgLib / X64 / IoLibExAsm.nasm
1 ;------------------------------------------------------------------------------
2 ;
3 ; Copyright (c) 2006 - 2013, 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 DEFAULT REL
15 SECTION .text
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 global ASM_PFX(IoReadFifo8)
27 ASM_PFX(IoReadFifo8):
28
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
35 ;------------------------------------------------------------------------------
36 ; VOID
37 ; EFIAPI
38 ; IoWriteFifo8 (
39 ; IN UINTN Port, // rcx
40 ; IN UINTN Size, // rdx
41 ; IN VOID *Buffer // r8
42 ; );
43 ;------------------------------------------------------------------------------
44 global ASM_PFX(IoWriteFifo8)
45 ASM_PFX(IoWriteFifo8):
46
47 xchg rcx, rdx
48 xchg rsi, r8 ; rdi: buffer address; r8: save rdi
49 rep outsb
50 mov rsi, r8 ; restore rdi
51 ret
52