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/** @file
The module entry point for TrEE configuration module.
Copyright (c) 2013, 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/TpmInstance.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/PeiServicesLib.h>
#include <Library/PcdLib.h>
#include <Ppi/ReadOnlyVariable2.h>
#include <Protocol/TrEEProtocol.h>
#include "TrEEConfigNvData.h"
TPM_INSTANCE_ID mTpmInstanceId[] = TPM_INSTANCE_ID_LIST;
CONST EFI_PEI_PPI_DESCRIPTOR gTpmSelectedPpi = {
(EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
&gEfiTpmDeviceSelectedGuid,
NULL
};
/**
This routine check both SetupVariable and real TPM device, and return final TpmDevice configuration.
@param SetupTpmDevice TpmDevice configuration in setup driver
@return TpmDevice configuration
**/
UINT8
DetectTpmDevice (
IN UINT8 SetupTpmDevice
);
/**
The entry point for TrEE configuration driver.
@param FileHandle Handle of the file being invoked.
@param PeiServices Describes the list of possible PEI Services.
@retval EFI_SUCCES Convert variable to PCD successfully.
@retval Others Fail to convert variable to PCD.
**/
EFI_STATUS
EFIAPI
TrEEConfigPeimEntryPoint (
IN EFI_PEI_FILE_HANDLE FileHandle,
IN CONST EFI_PEI_SERVICES **PeiServices
)
{
UINTN Size;
EFI_STATUS Status;
EFI_PEI_READ_ONLY_VARIABLE2_PPI *VariablePpi;
TREE_CONFIGURATION TrEEConfiguration;
UINTN Index;
UINT8 TpmDevice;
Status = PeiServicesLocatePpi (&gEfiPeiReadOnlyVariable2PpiGuid, 0, NULL, (VOID **) &VariablePpi);
ASSERT_EFI_ERROR (Status);
Size = sizeof(TrEEConfiguration);
Status = VariablePpi->GetVariable (
VariablePpi,
TREE_STORAGE_NAME,
&gTrEEConfigFormSetGuid,
NULL,
&Size,
&TrEEConfiguration
);
if (EFI_ERROR (Status)) {
//
// Variable not ready, set default value
//
TrEEConfiguration.TpmDevice = TPM_DEVICE_DEFAULT;
}
//
// Validation
//
if ((TrEEConfiguration.TpmDevice > TPM_DEVICE_MAX) || (TrEEConfiguration.TpmDevice < TPM_DEVICE_MIN)) {
TrEEConfiguration.TpmDevice = TPM_DEVICE_DEFAULT;
}
//
// Although we have SetupVariable info, we still need detect TPM device manually.
//
DEBUG ((EFI_D_ERROR, "TrEEConfiguration.TpmDevice from Setup: %x\n", TrEEConfiguration.TpmDevice));
if (PcdGetBool (PcdTpmAutoDetection)) {
TpmDevice = DetectTpmDevice (TrEEConfiguration.TpmDevice);
DEBUG ((EFI_D_ERROR, "TpmDevice final: %x\n", TpmDevice));
if (TpmDevice != TPM_DEVICE_NULL) {
TrEEConfiguration.TpmDevice = TpmDevice;
}
} else {
TpmDevice = TrEEConfiguration.TpmDevice;
}
//
// Convert variable to PCD.
// This is work-around because there is no gurantee DynamicHiiPcd can return correct value in DXE phase.
// Using DynamicPcd instead.
//
// NOTE: TrEEConfiguration variable contains the desired TpmDevice type,
// while PcdTpmInstanceGuid PCD contains the real detected TpmDevice type
//
for (Index = 0; Index < sizeof(mTpmInstanceId)/sizeof(mTpmInstanceId[0]); Index++) {
if (TpmDevice == mTpmInstanceId[Index].TpmDevice) {
Size = sizeof(mTpmInstanceId[Index].TpmInstanceGuid);
PcdSetPtr (PcdTpmInstanceGuid, &Size, &mTpmInstanceId[Index].TpmInstanceGuid);
DEBUG ((EFI_D_ERROR, "TpmDevice PCD: %g\n", &mTpmInstanceId[Index].TpmInstanceGuid));
break;
}
}
//
// Selection done
//
Status = PeiServicesInstallPpi (&gTpmSelectedPpi);
ASSERT_EFI_ERROR (Status);
return Status;
}
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