PeiDebugPrintHobLib.c

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#include <PiPei.h>
 
#include <Library/HobLib.h>
#include <Library/DebugLib.h>
#include <Library/PeiServicesLib.h>
 
#include <Ppi/ReadOnlyVariable2.h>
#include <Guid/DebugMask.h>
 
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;
}