1 /** @file 2 Implement TPM1.2 Startup related command. 3 4 Copyright (c) 2013, Intel Corporation. All rights reserved. <BR> 5 (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR> 6 This program and the accompanying materials 7 are licensed and made available under the terms and conditions of the BSD License 8 which accompanies this distribution. The full text of the license may be found at 9 http://opensource.org/licenses/bsd-license.php 10 11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 13 14 **/ 15 16 #include <PiPei.h> 17 #include <Library/BaseMemoryLib.h> 18 #include <Library/BaseLib.h> 19 #include <Library/Tpm12DeviceLib.h> 20 #include <Library/DebugLib.h> 21 22 #pragma pack(1) 23 24 typedef struct { 25 TPM_RQU_COMMAND_HDR Hdr; 26 TPM_STARTUP_TYPE TpmSt; 27 } TPM_CMD_START_UP; 28 29 #pragma pack() 30 31 /** 32 Send Startup command to TPM1.2. 33 34 @param TpmSt Startup Type. 35 36 @retval EFI_SUCCESS Operation completed successfully. 37 @retval EFI_DEVICE_ERROR Unexpected device behavior. 38 **/ 39 EFI_STATUS 40 EFIAPI 41 Tpm12Startup ( 42 IN TPM_STARTUP_TYPE TpmSt 43 ) 44 { 45 EFI_STATUS Status; 46 TPM_CMD_START_UP Command; 47 TPM_RSP_COMMAND_HDR Response; 48 UINT32 Length; 49 50 // 51 // send Tpm command TPM_ORD_Startup 52 // 53 Command.Hdr.tag = SwapBytes16 (TPM_TAG_RQU_COMMAND); 54 Command.Hdr.paramSize = SwapBytes32 (sizeof (Command)); 55 Command.Hdr.ordinal = SwapBytes32 (TPM_ORD_Startup); 56 Command.TpmSt = SwapBytes16 (TpmSt); 57 Length = sizeof (Response); 58 Status = Tpm12SubmitCommand (sizeof (Command), (UINT8 *)&Command, &Length, (UINT8 *)&Response); 59 if (EFI_ERROR (Status)) { 60 return Status; 61 } 62 switch (SwapBytes32(Response.returnCode)) { 63 case TPM_SUCCESS: 64 DEBUG ((DEBUG_INFO, "TPM12Startup: TPM_SUCCESS\n")); 65 return EFI_SUCCESS; 66 case TPM_INVALID_POSTINIT: 67 // In warm reset, TPM may response TPM_INVALID_POSTINIT 68 DEBUG ((DEBUG_INFO, "TPM12Startup: TPM_INVALID_POSTINIT\n")); 69 return EFI_SUCCESS; 70 default: 71 return EFI_DEVICE_ERROR; 72 } 73 } 74 75 /** 76 Send SaveState command to TPM1.2. 77 78 @retval EFI_SUCCESS Operation completed successfully. 79 @retval EFI_DEVICE_ERROR Unexpected device behavior. 80 **/ 81 EFI_STATUS 82 EFIAPI 83 Tpm12SaveState ( 84 VOID 85 ) 86 { 87 EFI_STATUS Status; 88 TPM_RQU_COMMAND_HDR Command; 89 TPM_RSP_COMMAND_HDR Response; 90 UINT32 Length; 91 92 // 93 // send Tpm command TPM_ORD_SaveState 94 // 95 Command.tag = SwapBytes16 (TPM_TAG_RQU_COMMAND); 96 Command.paramSize = SwapBytes32 (sizeof (Command)); 97 Command.ordinal = SwapBytes32 (TPM_ORD_SaveState); 98 Length = sizeof (Response); 99 Status = Tpm12SubmitCommand (sizeof (Command), (UINT8 *)&Command, &Length, (UINT8 *)&Response); 100 if (EFI_ERROR (Status)) { 101 return Status; 102 } 103 switch (SwapBytes32 (Response.returnCode)) { 104 case TPM_SUCCESS: 105 return EFI_SUCCESS; 106 default: 107 return EFI_DEVICE_ERROR; 108 } 109 } 110
