mirror of https://github.com/acidanthera/audk.git
273 lines
10 KiB
C
273 lines
10 KiB
C
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/** @file
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Utility functions used by TPM PEI driver.
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Copyright (c) 2005 - 2011, Intel Corporation. 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 "TpmComm.h"
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/**
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Send a command to TPM for execution and return response data.
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@param[in] PeiServices Describes the list of possible PEI Services.
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@param[in] TisReg TPM register space base address.
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@param[in] BufferIn Buffer for command data.
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@param[in] SizeIn Size of command data.
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@param[in, out] BufferOut Buffer for response data.
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@param[in, out] SizeOut size of response data.
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@retval EFI_SUCCESS Operation completed successfully.
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@retval EFI_TIMEOUT The register can't run into the expected status in time.
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@retval EFI_BUFFER_TOO_SMALL Response data buffer is too small.
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@retval EFI_DEVICE_ERROR Unexpected device behavior.
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**/
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EFI_STATUS
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TisTpmCommand (
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IN EFI_PEI_SERVICES **PeiServices,
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IN TIS_PC_REGISTERS_PTR TisReg,
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IN UINT8 *BufferIn,
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IN UINT32 SizeIn,
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IN OUT UINT8 *BufferOut,
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IN OUT UINT32 *SizeOut
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);
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/**
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Send TPM_Startup command to TPM.
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@param[in] PeiServices Describes the list of possible PEI Services.
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@param[in] TpmHandle TPM handle.
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@param[in] BootMode Boot mode.
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@retval EFI_SUCCESS Operation completed successfully.
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@retval EFI_TIMEOUT The register can't run into the expected status in time.
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@retval EFI_BUFFER_TOO_SMALL Response data buffer is too small.
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@retval EFI_DEVICE_ERROR Unexpected device behavior.
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**/
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EFI_STATUS
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TpmCommStartup (
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IN EFI_PEI_SERVICES **PeiServices,
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IN TIS_TPM_HANDLE TpmHandle,
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IN EFI_BOOT_MODE BootMode
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)
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{
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EFI_STATUS Status;
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TPM_STARTUP_TYPE TpmSt;
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UINT32 TpmRecvSize;
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UINT32 TpmSendSize;
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TPM_CMD_START_UP SendBuffer;
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UINT8 RecvBuffer[20];
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TpmSt = TPM_ST_CLEAR;
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if (BootMode == BOOT_ON_S3_RESUME) {
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TpmSt = TPM_ST_STATE;
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}
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//
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// send Tpm command TPM_ORD_Startup
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//
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TpmRecvSize = 20;
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TpmSendSize = sizeof (TPM_CMD_START_UP);
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SendBuffer.Hdr.tag = SwapBytes16 (TPM_TAG_RQU_COMMAND);
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SendBuffer.Hdr.paramSize = SwapBytes32 (TpmSendSize);
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SendBuffer.Hdr.ordinal = SwapBytes32 (TPM_ORD_Startup);
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SendBuffer.TpmSt = SwapBytes16 (TpmSt);
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Status = TisTpmCommand (PeiServices, TpmHandle, (UINT8 *)&SendBuffer, TpmSendSize, RecvBuffer, &TpmRecvSize);
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return Status;
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}
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/**
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Send TPM_ContinueSelfTest command to TPM.
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@param[in] PeiServices Describes the list of possible PEI Services.
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@param[in] TpmHandle TPM handle.
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@retval EFI_SUCCESS Operation completed successfully.
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@retval EFI_TIMEOUT The register can't run into the expected status in time.
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@retval EFI_BUFFER_TOO_SMALL Response data buffer is too small.
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@retval EFI_DEVICE_ERROR Unexpected device behavior.
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**/
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EFI_STATUS
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TpmCommContinueSelfTest (
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IN EFI_PEI_SERVICES **PeiServices,
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IN TIS_TPM_HANDLE TpmHandle
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)
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{
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EFI_STATUS Status;
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UINT32 TpmRecvSize;
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UINT32 TpmSendSize;
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TPM_CMD_SELF_TEST SendBuffer;
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UINT8 RecvBuffer[20];
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//
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// send Tpm command TPM_ORD_ContinueSelfTest
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//
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TpmRecvSize = 20;
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TpmSendSize = sizeof (TPM_CMD_SELF_TEST);
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SendBuffer.Hdr.tag = SwapBytes16 (TPM_TAG_RQU_COMMAND);
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SendBuffer.Hdr.paramSize = SwapBytes32 (TpmSendSize);
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SendBuffer.Hdr.ordinal = SwapBytes32 (TPM_ORD_ContinueSelfTest);
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Status = TisTpmCommand (PeiServices, TpmHandle, (UINT8 *)&SendBuffer, TpmSendSize, RecvBuffer, &TpmRecvSize);
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return Status;
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}
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/**
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Get TPM capability flags.
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@param[in] PeiServices Describes the list of possible PEI Services.
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@param[in] TpmHandle TPM handle.
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@param[out] Deactivated Returns deactivated flag.
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@param[out] LifetimeLock Returns physicalPresenceLifetimeLock permanent flag.
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@param[out] CmdEnable Returns physicalPresenceCMDEnable permanent flag.
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@retval EFI_SUCCESS Operation completed successfully.
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@retval EFI_TIMEOUT The register can't run into the expected status in time.
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@retval EFI_BUFFER_TOO_SMALL Response data buffer is too small.
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@retval EFI_DEVICE_ERROR Unexpected device behavior.
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**/
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EFI_STATUS
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TpmCommGetCapability (
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IN EFI_PEI_SERVICES **PeiServices,
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IN TIS_TPM_HANDLE TpmHandle,
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OUT BOOLEAN *Deactivated, OPTIONAL
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OUT BOOLEAN *LifetimeLock, OPTIONAL
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OUT BOOLEAN *CmdEnable OPTIONAL
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)
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{
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EFI_STATUS Status;
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UINT32 TpmRecvSize;
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UINT32 TpmSendSize;
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TPM_CMD_GET_CAPABILITY SendBuffer;
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UINT8 RecvBuffer[40];
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TPM_PERMANENT_FLAGS *TpmPermanentFlags;
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//
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// send Tpm command TPM_ORD_GetCapability
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//
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TpmRecvSize = 40;
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TpmSendSize = sizeof (TPM_CMD_GET_CAPABILITY);
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SendBuffer.Hdr.tag = SwapBytes16 (TPM_TAG_RQU_COMMAND);
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SendBuffer.Hdr.paramSize = SwapBytes32 (TpmSendSize);
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SendBuffer.Hdr.ordinal = SwapBytes32 (TPM_ORD_GetCapability);
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SendBuffer.Capability = SwapBytes32 (TPM_CAP_FLAG);
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SendBuffer.CapabilityFlagSize = SwapBytes32 (sizeof (TPM_CAP_FLAG_PERMANENT));
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SendBuffer.CapabilityFlag = SwapBytes32 (TPM_CAP_FLAG_PERMANENT);
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Status = TisTpmCommand (PeiServices, TpmHandle, (UINT8 *)&SendBuffer, TpmSendSize, RecvBuffer, &TpmRecvSize);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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TpmPermanentFlags = (TPM_PERMANENT_FLAGS *)&RecvBuffer[sizeof (TPM_RSP_COMMAND_HDR) + sizeof (UINT32)];
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if (Deactivated != NULL) {
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*Deactivated = TpmPermanentFlags->deactivated;
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}
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if (LifetimeLock != NULL) {
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*LifetimeLock = TpmPermanentFlags->physicalPresenceLifetimeLock;
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}
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if (CmdEnable != NULL) {
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*CmdEnable = TpmPermanentFlags->physicalPresenceCMDEnable;
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}
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return Status;
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}
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/**
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Extend a TPM PCR.
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@param[in] PeiServices Describes the list of possible PEI Services.
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@param[in] TpmHandle TPM handle.
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@param[in] DigestToExtend The 160 bit value representing the event to be recorded.
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@param[in] PcrIndex The PCR to be updated.
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@param[out] NewPcrValue New PCR value after extend.
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@retval EFI_SUCCESS Operation completed successfully.
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@retval EFI_TIMEOUT The register can't run into the expected status in time.
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@retval EFI_BUFFER_TOO_SMALL Response data buffer is too small.
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@retval EFI_DEVICE_ERROR Unexpected device behavior.
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**/
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EFI_STATUS
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TpmCommExtend (
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IN EFI_PEI_SERVICES **PeiServices,
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IN TIS_TPM_HANDLE TpmHandle,
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IN TPM_DIGEST *DigestToExtend,
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IN TPM_PCRINDEX PcrIndex,
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OUT TPM_DIGEST *NewPcrValue
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)
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{
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EFI_STATUS Status;
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UINT32 TpmSendSize;
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UINT32 TpmRecvSize;
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TPM_CMD_EXTEND SendBuffer;
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UINT8 RecvBuffer[10 + sizeof(TPM_DIGEST)];
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//
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// send Tpm command TPM_ORD_Extend
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//
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TpmRecvSize = sizeof (TPM_RSP_COMMAND_HDR) + sizeof (TPM_DIGEST);
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TpmSendSize = sizeof (TPM_CMD_EXTEND);
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SendBuffer.Hdr.tag = SwapBytes16 (TPM_TAG_RQU_COMMAND);
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SendBuffer.Hdr.paramSize = SwapBytes32 (TpmSendSize);
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SendBuffer.Hdr.ordinal = SwapBytes32 (TPM_ORD_Extend);
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SendBuffer.PcrIndex = SwapBytes32 (PcrIndex);
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CopyMem (&SendBuffer.TpmDigest, (UINT8 *)DigestToExtend, sizeof (TPM_DIGEST));
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Status = TisTpmCommand (PeiServices, TpmHandle, (UINT8 *)&SendBuffer, TpmSendSize, RecvBuffer, &TpmRecvSize);
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ASSERT_EFI_ERROR (Status);
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if(NewPcrValue != NULL) {
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CopyMem ((UINT8*)NewPcrValue, &RecvBuffer[10], sizeof (TPM_DIGEST));
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}
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return Status;
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}
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/**
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Send TSC_PhysicalPresence command to TPM.
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@param[in] PeiServices Describes the list of possible PEI Services.
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@param[in] TpmHandle TPM handle.
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@param[in] PhysicalPresence The state to set the TPMs Physical Presence flags.
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@retval EFI_SUCCESS Operation completed successfully.
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@retval EFI_TIMEOUT The register can't run into the expected status in time.
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@retval EFI_BUFFER_TOO_SMALL Response data buffer is too small.
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@retval EFI_DEVICE_ERROR Unexpected device behavior.
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**/
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EFI_STATUS
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TpmCommPhysicalPresence (
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IN EFI_PEI_SERVICES **PeiServices,
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IN TIS_TPM_HANDLE TpmHandle,
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IN TPM_PHYSICAL_PRESENCE PhysicalPresence
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)
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{
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EFI_STATUS Status;
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UINT32 TpmSendSize;
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UINT32 TpmRecvSize;
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TPM_CMD_PHYSICAL_PRESENCE SendBuffer;
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UINT8 RecvBuffer[10];
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//
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// send Tpm command TSC_ORD_PhysicalPresence
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//
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TpmRecvSize = 10;
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TpmSendSize = sizeof (TPM_CMD_PHYSICAL_PRESENCE);
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SendBuffer.Hdr.tag = SwapBytes16 (TPM_TAG_RQU_COMMAND);
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SendBuffer.Hdr.paramSize = SwapBytes32 (TpmSendSize);
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SendBuffer.Hdr.ordinal = SwapBytes32 (TSC_ORD_PhysicalPresence);
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SendBuffer.PhysicalPresence = SwapBytes16 (PhysicalPresence);
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Status = TisTpmCommand (PeiServices, TpmHandle, (UINT8 *)&SendBuffer, TpmSendSize, RecvBuffer, &TpmRecvSize);
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return Status;
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}
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