mirror of https://github.com/acidanthera/audk.git
47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
|
/** @file
|
||
|
|
Shadow all option rom
|
||
|
|
|
||
|
|
Copyright (c) 2004 - 2008, Intel Corporation. <BR>
|
||
|
|
All rights reserved. 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.
|
||
|
|
|
||
|
|
**/
|
||
|
|
|
||
|
|
#include "InternalBdsLib.h"
|
||
|
|
|
||
|
|
UINT8 mShadowRomFlag = 0;
|
||
|
|
|
||
|
|
/**
|
||
|
|
Shadow all opton ROM if the it is not done.
|
||
|
|
**/
|
||
|
|
VOID
|
||
|
|
ShadowAllOptionRom(
|
||
|
|
VOID
|
||
|
|
)
|
||
|
|
{
|
||
|
|
EFI_STATUS Status;
|
||
|
|
EFI_LEGACY_BIOS_PROTOCOL *LegacyBios;
|
||
|
|
//
|
||
|
|
// Rom shadow only do once.
|
||
|
|
//
|
||
|
|
if (mShadowRomFlag == 0) {
|
||
|
|
Status = gBS->LocateProtocol (
|
||
|
|
&gEfiLegacyBiosProtocolGuid,
|
||
|
|
NULL,
|
||
|
|
(VOID **) &LegacyBios
|
||
|
|
);
|
||
|
|
if (!EFI_ERROR (Status)) {
|
||
|
|
LegacyBios->PrepareToBootEfi (LegacyBios, NULL, NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
mShadowRomFlag = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
return ;
|
||
|
|
}
|