mirror of https://github.com/acidanthera/audk.git
60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
|
/** @file
|
||
|
|
Get TPM 2.0 physical presence information.
|
||
|
|
|
||
|
|
This library will get TPM 2.0 physical presence information.
|
||
|
|
|
||
|
|
Copyright (c) 2015, Intel Corporation. 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 <Guid/Tcg2PhysicalPresenceData.h>
|
||
|
|
#include <Ppi/ReadOnlyVariable2.h>
|
||
|
|
|
||
|
|
#include <Library/DebugLib.h>
|
||
|
|
#include <Library/PeiServicesLib.h>
|
||
|
|
#include <Library/PeiServicesTablePointerLib.h>
|
||
|
|
#include <Library/Tcg2PhysicalPresenceLib.h>
|
||
|
|
|
||
|
|
/**
|
||
|
|
Return TPM2 ManagementFlags set by PP interface.
|
||
|
|
|
||
|
|
@retval ManagementFlags TPM2 Management Flags.
|
||
|
|
**/
|
||
|
|
UINT32
|
||
|
|
EFIAPI
|
||
|
|
Tcg2PhysicalPresenceLibGetManagementFlags (
|
||
|
|
VOID
|
||
|
|
)
|
||
|
|
{
|
||
|
|
EFI_STATUS Status;
|
||
|
|
EFI_PEI_READ_ONLY_VARIABLE2_PPI *VariablePpi;
|
||
|
|
EFI_TCG2_PHYSICAL_PRESENCE_FLAGS PpiFlags;
|
||
|
|
UINTN DataSize;
|
||
|
|
|
||
|
|
Status = PeiServicesLocatePpi (&gEfiPeiReadOnlyVariable2PpiGuid, 0, NULL, (VOID **) &VariablePpi);
|
||
|
|
ASSERT_EFI_ERROR (Status);
|
||
|
|
|
||
|
|
DataSize = sizeof (EFI_TCG2_PHYSICAL_PRESENCE_FLAGS);
|
||
|
|
Status = VariablePpi->GetVariable (
|
||
|
|
VariablePpi,
|
||
|
|
TCG2_PHYSICAL_PRESENCE_FLAGS_VARIABLE,
|
||
|
|
&gEfiTcg2PhysicalPresenceGuid,
|
||
|
|
NULL,
|
||
|
|
&DataSize,
|
||
|
|
&PpiFlags
|
||
|
|
);
|
||
|
|
if (EFI_ERROR (Status)) {
|
||
|
|
PpiFlags.PPFlags = TCG2_BIOS_TPM_MANAGEMENT_FLAG_DEFAULT;
|
||
|
|
}
|
||
|
|
return PpiFlags.PPFlags;
|
||
|
|
}
|