diff options
Diffstat (limited to 'OvmfPkg/Library/QemuFwCfgLib/X64/IoLibExAsm.asm')
| -rw-r--r-- | OvmfPkg/Library/QemuFwCfgLib/X64/IoLibExAsm.asm | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/OvmfPkg/Library/QemuFwCfgLib/X64/IoLibExAsm.asm b/OvmfPkg/Library/QemuFwCfgLib/X64/IoLibExAsm.asm index c60ad2c5d4..47ac158f85 100644 --- a/OvmfPkg/Library/QemuFwCfgLib/X64/IoLibExAsm.asm +++ b/OvmfPkg/Library/QemuFwCfgLib/X64/IoLibExAsm.asm @@ -1,6 +1,6 @@ ;------------------------------------------------------------------------------
;
-; Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
+; Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
; This program and the accompanying materials
; are licensed and made available under the terms and conditions of the BSD License
; which accompanies this distribution. The full text of the license may be found at
@@ -32,5 +32,25 @@ rep insb IoReadFifo8 ENDP
+
+;------------------------------------------------------------------------------
+; VOID
+; EFIAPI
+; IoWriteFifo8 (
+; IN UINTN Port, // rcx
+; IN UINTN Size, // rdx
+; IN VOID *Buffer // r8
+; );
+;------------------------------------------------------------------------------
+IoWriteFifo8 PROC
+
+ xchg rcx, rdx
+ xchg rsi, r8 ; rdi: buffer address; r8: save rdi
+rep outsb
+ mov rsi, r8 ; restore rdi
+ ret
+
+IoWriteFifo8 ENDP
+
END
|