Follow UEFI spec, set TimeOut and HwErrRecSupport variable by EFI variable service instead of PcdSet().

Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14162 6f19259b-4bc3-4df7-8a09-765794883524

IntelFrameworkModulePkg/Universal/BdsDxe/BdsEntry.c

@@ -457,6 +457,8 @@ BdsEntry (
   LIST_ENTRY                      BootOptionList;
   UINTN                           BootNextSize;
   CHAR16                          *FirmwareVendor;
+  EFI_STATUS                      Status;
+  UINT16                          BootTimeOut;
 
   //
   // Insert the performance probe
@@ -510,6 +512,25 @@ BdsEntry (
 
   InitializeHwErrRecSupport();
 
+  //
+  // Initialize L"Timeout" EFI global variable.
+  //
+  BootTimeOut = PcdGet16 (PcdPlatformBootTimeOut);
+  if (BootTimeOut != 0xFFFF) {
+    //
+    // If time out value equal 0xFFFF, no need set to 0xFFFF to variable area because UEFI specification
+    // define same behavior between no value or 0xFFFF value for L"Timeout".
+    //
+    Status = gRT->SetVariable (
+                    L"Timeout",
+                    &gEfiGlobalVariableGuid,
+                    EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
+                    sizeof (UINT16),
+                    &BootTimeOut
+                    );
+    ASSERT_EFI_ERROR(Status);
+  }
+
   //
   // bugbug: platform specific code
   // Initialize the platform specific string and language