EdkNt32Pkg/Library/EdkGenericBdsLib/Ipf/ShadowRom.c

   1 /*++
   2
   3 Copyright (c) 2006, 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 #include "Tiano.h"
  25 #include "EfiDriverLib.h"
  26
  27 #include EFI_PROTOCOL_DEFINITION (LegacyBios)
  28
  29 UINT8 mShadowRomFlag = 0;
  30
  31 VOID
  32 ShadowAllOptionRom()
  33 {
  34   EFI_STATUS                Status;
  35   EFI_LEGACY_BIOS_PROTOCOL  *LegacyBios;
  36   //
  37   // Rom shadow only do once.
  38   //
  39   if (mShadowRomFlag == 0) {
  40     Status = gBS->LocateProtocol (
  41                     &gEfiLegacyBiosProtocolGuid,
  42                     NULL,
  43                     &LegacyBios
  44                     );
  45     if (!EFI_ERROR (Status)) {
  46       LegacyBios->PrepareToBootEfi (LegacyBios, NULL, NULL);
  47     }
  48
  49     mShadowRomFlag = 1;
  50   }
  51
  52   return ;
  53 }