EdkModulePkg/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 UINT8 mShadowRomFlag = 0;
  25
  26 VOID
  27 ShadowAllOptionRom()
  28 {
  29   EFI_STATUS                Status;
  30   EFI_LEGACY_BIOS_PROTOCOL  *LegacyBios;
  31   //
  32   // Rom shadow only do once.
  33   //
  34   if (mShadowRomFlag == 0) {
  35     Status = gBS->LocateProtocol (
  36                     &gEfiLegacyBiosProtocolGuid,
  37                     NULL,
  38                     &LegacyBios
  39                     );
  40     if (!EFI_ERROR (Status)) {
  41       LegacyBios->PrepareToBootEfi (LegacyBios, NULL, NULL);
  42     }
  43
  44     mShadowRomFlag = 1;
  45   }
  46
  47   return ;
  48 }