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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>
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;
}
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