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OvmfPkg: Add QemuFwCfgLib library class and implementation

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QEMU's Firmware Configuration interface gives the firmware
access to various types of information.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13383 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
jljusten
2012-05-30 23:14:38 +00:00
parent d90e7d81c0
commit f1ec65ba24
11 changed files with 603 additions and 1 deletions
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30
OvmfPkg/Library/QemuFwCfgLib/X64/IoLibExAsm.S Normal file
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#------------------------------------------------------------------------------
#
# Copyright (c) 2006 - 2012, 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
# http://opensource.org/licenses/bsd-license.php.
#
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#
#------------------------------------------------------------------------------
#------------------------------------------------------------------------------
# VOID
# EFIAPI
# IoReadFifo8 (
# IN UINTN Port, // rcx
# IN UINTN Size, // rdx
# IN VOID *Buffer // r8
# );
#------------------------------------------------------------------------------
ASM_GLOBAL ASM_PFX(IoReadFifo8)
ASM_PFX(IoReadFifo8):
xchg %rcx, %rdx
xchg %r8, %rdi # rdi: buffer address; r8: save rdi
rep insb
mov %r8, %rdi # restore rdi
ret

36
OvmfPkg/Library/QemuFwCfgLib/X64/IoLibExAsm.asm Normal file
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;------------------------------------------------------------------------------
;
; Copyright (c) 2006 - 2012, 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
; http://opensource.org/licenses/bsd-license.php.
;
; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
;
;------------------------------------------------------------------------------
.code
;------------------------------------------------------------------------------
; VOID
; EFIAPI
; IoReadFifo8 (
; IN UINTN Port, // rcx
; IN UINTN Size, // rdx
; IN VOID *Buffer // r8
; );
;------------------------------------------------------------------------------
IoReadFifo8 PROC
xchg rcx, rdx
xchg rdi, r8 ; rdi: buffer address; r8: save rdi
rep insb
mov rdi, r8 ; restore rdi
ret
IoReadFifo8 ENDP
END