1 files changed, 78 insertions, 0 deletions
diff --git a/MdeModulePkg/Library/PeiDebugPrintHobLib/PeiDebugPrintHobLib.c b/MdeModulePkg/Library/PeiDebugPrintHobLib/PeiDebugPrintHobLib.c
new file mode 100644
index 0000000000..4bcf0030a0
--- /dev/null
+++ b/MdeModulePkg/Library/PeiDebugPrintHobLib/PeiDebugPrintHobLib.c
@@ -0,0 +1,78 @@
+/** @file
+  NULL Library class that reads Debug Mask variable and if it exists makes a
+  HOB that contains the debug mask.
+
+  Copyright (c) 2011, Apple, Inc. 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 <PiPei.h>
+
+#include <Library/HobLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PeiServicesLib.h>
+
+#include <Ppi/ReadOnlyVariable2.h>
+#include <Guid/DebugMask.h>
+
+
+/**
+  The constructor reads variable and sets HOB
+  
+  @param  FileHandle   The handle of FFS header the loaded driver.
+  @param  PeiServices  The pointer to the PEI services.
+
+  @retval EFI_SUCCESS  The constructor always returns EFI_SUCCESS.
+
+**/
+EFI_STATUS
+EFIAPI
+PeiDebugPrintHobLibConstructor (
+  IN EFI_PEI_FILE_HANDLE        FileHandle,
+  IN CONST EFI_PEI_SERVICES     **PeiServices
+  )
+{
+  EFI_STATUS                      Status;
+  EFI_PEI_READ_ONLY_VARIABLE2_PPI *Variable;
+  UINTN                           Size;
+  UINT64                          GlobalErrorLevel;
+  UINT32                          HobErrorLevel;
+  
+  Status = PeiServicesLocatePpi (
+             &gEfiPeiReadOnlyVariable2PpiGuid,
+             0,
+             NULL,
+             (VOID **)&Variable
+             );
+  if (!EFI_ERROR (Status)) {
+    Size = sizeof (GlobalErrorLevel);
+    Status = Variable->GetVariable ( 
+                         Variable, 
+                         DEBUG_MASK_VARIABLE_NAME,
+                         &gEfiGenericVariableGuid,
+                         NULL,
+                         &Size,
+                         &GlobalErrorLevel
+                         );
+    if (!EFI_ERROR (Status)) {
+      //
+      // Build the GUID'ed HOB for DXE
+      //
+      HobErrorLevel = (UINT32)GlobalErrorLevel;
+      BuildGuidDataHob (
+        &gEfiGenericVariableGuid,
+        &HobErrorLevel,
+        sizeof (HobErrorLevel)
+        );
+    }
+  }
+
+  return EFI_SUCCESS;
+}