1 /** @file 2 Get TPM 2.0 physical presence information. 3 4 This library will get TPM 2.0 physical presence information. 5 6 Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR> 7 This program and the accompanying materials 8 are licensed and made available under the terms and conditions of the BSD License 9 which accompanies this distribution. The full text of the license may be found at 10 http://opensource.org/licenses/bsd-license.php 11 12 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 13 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 14 15 **/ 16 17 #include <PiPei.h> 18 19 #include <Guid/Tcg2PhysicalPresenceData.h> 20 #include <Ppi/ReadOnlyVariable2.h> 21 22 #include <Library/DebugLib.h> 23 #include <Library/PeiServicesLib.h> 24 #include <Library/PeiServicesTablePointerLib.h> 25 #include <Library/Tcg2PhysicalPresenceLib.h> 26 27 /** 28 Return TPM2 ManagementFlags set by PP interface. 29 30 @retval ManagementFlags TPM2 Management Flags. 31 **/ 32 UINT32 33 EFIAPI 34 Tcg2PhysicalPresenceLibGetManagementFlags ( 35 VOID 36 ) 37 { 38 EFI_STATUS Status; 39 EFI_PEI_READ_ONLY_VARIABLE2_PPI *VariablePpi; 40 EFI_TCG2_PHYSICAL_PRESENCE_FLAGS PpiFlags; 41 UINTN DataSize; 42 43 Status = PeiServicesLocatePpi (&gEfiPeiReadOnlyVariable2PpiGuid, 0, NULL, (VOID **) &VariablePpi); 44 ASSERT_EFI_ERROR (Status); 45 46 DataSize = sizeof (EFI_TCG2_PHYSICAL_PRESENCE_FLAGS); 47 Status = VariablePpi->GetVariable ( 48 VariablePpi, 49 TCG2_PHYSICAL_PRESENCE_FLAGS_VARIABLE, 50 &gEfiTcg2PhysicalPresenceGuid, 51 NULL, 52 &DataSize, 53 &PpiFlags 54 ); 55 if (EFI_ERROR (Status)) { 56 PpiFlags.PPFlags = TCG2_BIOS_TPM_MANAGEMENT_FLAG_DEFAULT | TCG2_BIOS_STORAGE_MANAGEMENT_FLAG_DEFAULT; 57 } 58 return PpiFlags.PPFlags; 59 } 60
