MdeModulePkg: Add BdsDxe driver and PlatformBootManagerNull library.

BdsDxe driver links to UefiBootManagerLib and PlatformBootManager to
provide a pure UEFI boot manager conforming to the UEFI spec.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17328 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Universal/BdsDxe/HwErrRecSupport.c

@@ -0,0 +1,48 @@
+/** @file
+  Set the level of support for Hardware Error Record Persistence that is
+  implemented by the platform.
+
+Copyright (c) 2007 - 2015, Intel Corporation. All rights reserved.<BR>
+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.
+
+**/
+
+#include "HwErrRecSupport.h"
+
+/**
+  Set the HwErrRecSupport variable contains a binary UINT16 that supplies the
+  level of support for Hardware Error Record Persistence that is implemented
+  by the platform.
+
+**/
+VOID
+InitializeHwErrRecSupport (
+  VOID
+  )
+{
+  EFI_STATUS    Status;
+  UINT16        HardwareErrorRecordLevel;
+  
+  HardwareErrorRecordLevel = PcdGet16 (PcdHardwareErrorRecordLevel);
+  
+  if (HardwareErrorRecordLevel != 0) {
+    //
+    // If level value equal 0, no need set to 0 to variable area because UEFI specification
+    // define same behavior between no value or 0 value for L"HwErrRecSupport".
+    //
+    Status = gRT->SetVariable (
+                    L"HwErrRecSupport",
+                    &gEfiGlobalVariableGuid,
+                    EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
+                    sizeof (UINT16),
+                    &HardwareErrorRecordLevel
+                    );
+    ASSERT_EFI_ERROR(Status);
+  }
+}