From 0934a6058115f8d4da946656605831cd5131ed4a Mon Sep 17 00:00:00 2001
From: li-elvin <li-elvin@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Fri, 15 Mar 2013 01:34:21 +0000
Subject: [PATCH] Call LegacyBiosInstallVgaRom to shadow Legacy VBIOS instead
 of LegacyBiosInstallPciRom during legacy boot.

Signed-off-by: Li Elvin <elvin.li@intel.com>
Reviewed-by: Ni Ruiyu <ruiyu.ni@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14205 6f19259b-4bc3-4df7-8a09-765794883524
---
 .../Csm/LegacyBiosDxe/LegacyBiosInterface.h    | 18 +++++++++++++++++-
 .../Csm/LegacyBiosDxe/LegacyPci.c              | 16 +++++++++++++++-
 2 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBiosInterface.h b/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBiosInterface.h
index a63a7257de..d60851a42c 100644
--- a/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBiosInterface.h
+++ b/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyBiosInterface.h
@@ -1,6 +1,6 @@
 /** @file
 
-Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
 
 This program and the accompanying materials
 are licensed and made available under the terms and conditions
@@ -1520,4 +1520,20 @@ InternalLegacyBiosFarCall (
   IN  UINTN                           StackSize
   );
 
+/**
+  Load a legacy PC-AT OpROM for VGA controller.
+
+  @param  Private                Driver private data.
+
+  @retval EFI_SUCCESS            Legacy ROM successfully installed for this device.
+  @retval EFI_DEVICE_ERROR       No VGA device handle found, or native EFI video
+                                 driver cannot be successfully disconnected, or VGA
+                                 thunk driver cannot be successfully connected.
+
+**/
+EFI_STATUS
+LegacyBiosInstallVgaRom (
+  IN  LEGACY_BIOS_INSTANCE            *Private
+  );
+
 #endif
diff --git a/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyPci.c b/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyPci.c
index 910ed41b37..5b1117eb1b 100644
--- a/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyPci.c
+++ b/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyPci.c
@@ -1,6 +1,6 @@
 /** @file
 
-Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
 
 This program and the accompanying materials
 are licensed and made available under the terms and conditions
@@ -1715,6 +1715,20 @@ PciShadowRoms (
     if (!EFI_ERROR (Status)) {
       continue;
     }
+    
+    //
+    // If legacy VBIOS Oprom has not been dispatched before, install legacy VBIOS here.
+    //
+    if (IS_PCI_DISPLAY (&Pci) && Index == 0) {    
+      Status = LegacyBiosInstallVgaRom (Private);
+      //
+      // A return status of EFI_NOT_FOUND is considered valid (No EFI
+      // driver is controlling video).
+      //
+      ASSERT ((Status == EFI_SUCCESS) || (Status == EFI_NOT_FOUND));
+      continue;
+    }
+
     //
     // Install legacy ROM
     //
-- 
2.39.2