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d4a78455c6
Debug Print Error level can be controled by an EFI variable. Update the DXE version of the library to use a HOB if the variable services are not yet availilbe. This allows the variable to be used early in the DXE phase. approved-by: andrewfish reviewed-by: lgao4 git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12516 6f19259b-4bc3-4df7-8a09-765794883524
79 lines
2.3 KiB
C
79 lines
2.3 KiB
C
/** @file
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NULL Library class that reads Debug Mask variable and if it exists makes a
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HOB that contains the debug mask.
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Copyright (c) 2011, Apple, Inc. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <PiPei.h>
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#include <Library/HobLib.h>
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#include <Library/DebugLib.h>
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#include <Library/PeiServicesLib.h>
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#include <Ppi/ReadOnlyVariable2.h>
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#include <Guid/DebugMask.h>
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/**
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The constructor reads variable and sets HOB
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@param FileHandle The handle of FFS header the loaded driver.
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@param PeiServices The pointer to the PEI services.
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@retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
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**/
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EFI_STATUS
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EFIAPI
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PeiDebugPrintHobLibConstructor (
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IN EFI_PEI_FILE_HANDLE FileHandle,
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IN CONST EFI_PEI_SERVICES **PeiServices
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)
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{
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EFI_STATUS Status;
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EFI_PEI_READ_ONLY_VARIABLE2_PPI *Variable;
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UINTN Size;
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UINT64 GlobalErrorLevel;
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UINT32 HobErrorLevel;
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Status = PeiServicesLocatePpi (
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&gEfiPeiReadOnlyVariable2PpiGuid,
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0,
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NULL,
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(VOID **)&Variable
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);
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if (!EFI_ERROR (Status)) {
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Size = sizeof (GlobalErrorLevel);
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Status = Variable->GetVariable (
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Variable,
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DEBUG_MASK_VARIABLE_NAME,
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&gEfiGenericVariableGuid,
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NULL,
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&Size,
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&GlobalErrorLevel
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);
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if (!EFI_ERROR (Status)) {
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//
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// Build the GUID'ed HOB for DXE
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//
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HobErrorLevel = (UINT32)GlobalErrorLevel;
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BuildGuidDataHob (
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&gEfiGenericVariableGuid,
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&HobErrorLevel,
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sizeof (HobErrorLevel)
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);
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}
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}
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return EFI_SUCCESS;
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}
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