MdeModulePkg/Library/GenericBdsLib/Ipf/ShadowRom.c

   1 /** @file
   2
   3 Copyright (c) 2004, Intel Corporation
   4 All rights reserved. This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 Module Name:
  13
  14   ShadowRom.c
  15
  16 Abstract:
  17
  18   Shadow all option rom
  19
  20 Revision History
  21
  22
  23 **/
  24
  25 //@MT:#include "Tiano.h"
  26 //@MT:#include "EfiDriverLib.h"
  27
  28 //@MT:#include EFI_PROTOCOL_DEFINITION (LegacyBios)
  29
  30 #include "InternalBdsLib.h"
  31
  32 UINT8 mShadowRomFlag = 0;
  33
  34 VOID
  35 ShadowAllOptionRom()
  36 {
  37   EFI_STATUS                Status;
  38   EFI_LEGACY_BIOS_PROTOCOL  *LegacyBios;
  39   //
  40   // Rom shadow only do once.
  41   //
  42   if (mShadowRomFlag == 0) {
  43     Status = gBS->LocateProtocol (
  44                     &gEfiLegacyBiosProtocolGuid,
  45                     NULL,
  46                     (VOID **) &LegacyBios
  47                     );
  48     if (!EFI_ERROR (Status)) {
  49       LegacyBios->PrepareToBootEfi (LegacyBios, NULL, NULL);
  50     }
  51
  52     mShadowRomFlag = 1;
  53   }
  54
  55   return ;
  56 }