1 /** @file 2 NULL Library class that reads Debug Mask variable and if it exists makes a 3 HOB that contains the debug mask. 4 5 Copyright (c) 2011, Apple, Inc. All rights reserved.<BR> 6 This program and the accompanying materials 7 are licensed and made available under the terms and conditions of the BSD License 8 which accompanies this distribution. The full text of the license may be found at 9 http://opensource.org/licenses/bsd-license.php 10 11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 13 14 **/ 15 16 #include <PiPei.h> 17 18 #include <Library/HobLib.h> 19 #include <Library/DebugLib.h> 20 #include <Library/PeiServicesLib.h> 21 22 #include <Ppi/ReadOnlyVariable2.h> 23 #include <Guid/DebugMask.h> 24 25 26 /** 27 The constructor reads variable and sets HOB 28 29 @param FileHandle The handle of FFS header the loaded driver. 30 @param PeiServices The pointer to the PEI services. 31 32 @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS. 33 34 **/ 35 EFI_STATUS 36 EFIAPI 37 PeiDebugPrintHobLibConstructor ( 38 IN EFI_PEI_FILE_HANDLE FileHandle, 39 IN CONST EFI_PEI_SERVICES **PeiServices 40 ) 41 { 42 EFI_STATUS Status; 43 EFI_PEI_READ_ONLY_VARIABLE2_PPI *Variable; 44 UINTN Size; 45 UINT64 GlobalErrorLevel; 46 UINT32 HobErrorLevel; 47 48 Status = PeiServicesLocatePpi ( 49 &gEfiPeiReadOnlyVariable2PpiGuid, 50 0, 51 NULL, 52 (VOID **)&Variable 53 ); 54 if (!EFI_ERROR (Status)) { 55 Size = sizeof (GlobalErrorLevel); 56 Status = Variable->GetVariable ( 57 Variable, 58 DEBUG_MASK_VARIABLE_NAME, 59 &gEfiGenericVariableGuid, 60 NULL, 61 &Size, 62 &GlobalErrorLevel 63 ); 64 if (!EFI_ERROR (Status)) { 65 // 66 // Build the GUID'ed HOB for DXE 67 // 68 HobErrorLevel = (UINT32)GlobalErrorLevel; 69 BuildGuidDataHob ( 70 &gEfiGenericVariableGuid, 71 &HobErrorLevel, 72 sizeof (HobErrorLevel) 73 ); 74 } 75 } 76 77 return EFI_SUCCESS; 78 } 79
