UEFI HII: Merge UEFI HII support changes from branch.

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

diff --git a/MdeModulePkg/Library/GenericBdsLib/Ipf/ShadowRom.c b/MdeModulePkg/Library/GenericBdsLib/Ipf/ShadowRom.c
new file mode 100644 (file)
index 0000000..b1bec9d
--- /dev/null
+++ b/MdeModulePkg/Library/GenericBdsLib/Ipf/ShadowRom.c
@@ -0,0 +1,56 @@
+/** @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 ;
+}