128 lines
3.6 KiB
C
128 lines
3.6 KiB
C
/** @file
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Implement TPM1.2 Startup related command.
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Copyright (c) 2013, 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 <Uefi.h>
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#include <IndustryStandard/Tpm12.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/BaseLib.h>
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#include <Library/Tpm12DeviceLib.h>
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#pragma pack(1)
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typedef struct {
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TPM_RQU_COMMAND_HDR Hdr;
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TPM_STARTUP_TYPE TpmSt;
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} TPM_CMD_START_UP;
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typedef struct {
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TPM_RSP_COMMAND_HDR Hdr;
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} TPM_RSP_START_UP;
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typedef struct {
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TPM_RQU_COMMAND_HDR Hdr;
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} TPM_CMD_SAVE_STATE;
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typedef struct {
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TPM_RSP_COMMAND_HDR Hdr;
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} TPM_RSP_SAVE_STATE;
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#pragma pack()
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/**
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Send Startup command to TPM1.2.
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@param TpmSt Startup Type.
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@retval EFI_SUCCESS Operation completed successfully.
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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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EFIAPI
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Tpm12Startup (
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IN TPM_STARTUP_TYPE TpmSt
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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_START_UP SendBuffer;
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TPM_RSP_START_UP RecvBuffer;
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UINT32 ReturnCode;
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//
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// send Tpm command TPM_ORD_Startup
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//
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TpmRecvSize = sizeof (TPM_RSP_START_UP);
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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 = Tpm12SubmitCommand (TpmSendSize, (UINT8 *)&SendBuffer, &TpmRecvSize, (UINT8 *)&RecvBuffer);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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ReturnCode = SwapBytes32(RecvBuffer.Hdr.returnCode);
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switch (ReturnCode) {
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case TPM_SUCCESS:
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case TPM_INVALID_POSTINIT:
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// In warm reset, TPM may response TPM_INVALID_POSTINIT
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return EFI_SUCCESS;
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default:
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return EFI_DEVICE_ERROR;
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}
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}
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/**
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Send SaveState command to TPM1.2.
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@retval EFI_SUCCESS Operation completed successfully.
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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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EFIAPI
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Tpm12SaveState (
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VOID
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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_SAVE_STATE SendBuffer;
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TPM_RSP_SAVE_STATE RecvBuffer;
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UINT32 ReturnCode;
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//
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// send Tpm command TPM_ORD_SaveState
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//
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TpmRecvSize = sizeof (TPM_RSP_SAVE_STATE);
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TpmSendSize = sizeof (TPM_CMD_SAVE_STATE);
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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_SaveState);
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Status = Tpm12SubmitCommand (TpmSendSize, (UINT8 *)&SendBuffer, &TpmRecvSize, (UINT8 *)&RecvBuffer);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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ReturnCode = SwapBytes32(RecvBuffer.Hdr.returnCode);
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switch (ReturnCode) {
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case TPM_SUCCESS:
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return EFI_SUCCESS;
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default:
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return EFI_DEVICE_ERROR;
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}
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}
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