UEFI HII: Merge UEFI HII support changes from branch.

[mirror_edk2.git] / MdeModulePkg / Library / GenericBdsLib / Ipf / ShadowRom.c

/** @file

Copyright (c) 2004, Intel Corporation
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.

Module Name:

  ShadowRom.c

Abstract:

  Shadow all option rom

Revision History


**/

//@MT:#include "Tiano.h"
//@MT:#include "EfiDriverLib.h"

//@MT:#include EFI_PROTOCOL_DEFINITION (LegacyBios)

#include "InternalBdsLib.h"

UINT8 mShadowRomFlag = 0;

VOID
ShadowAllOptionRom()
{
  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 ;
}