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/** @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>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#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;
}
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