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QemuFwCfgLib: Add QemuFwCfgWriteBytes() function

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Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14109 6f19259b-4bc3-4df7-8a09-765794883524
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jljusten
2013-01-28 16:54:55 +00:00
parent b5e243b75f
commit 29874a8c60
6 changed files with 153 additions and 6 deletions
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19
OvmfPkg/Library/QemuFwCfgLib/X64/IoLibExAsm.S
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@@ -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
@@ -28,3 +28,20 @@ rep insb
mov %r8, %rdi # restore rdi
ret
#------------------------------------------------------------------------------
# VOID
# EFIAPI
# IoWriteFifo8 (
# IN UINTN Port, // rcx
# IN UINTN Size, // rdx
# IN VOID *Buffer // r8
# );
#------------------------------------------------------------------------------
ASM_GLOBAL ASM_PFX(IoWriteFifo8)
ASM_PFX(IoWriteFifo8):
xchg %rcx, %rdx
xchg %r8, %rsi # rdi: buffer address; r8: save rsi
rep outsb
mov %r8, %rsi # restore rsi
ret