SecurityPkg/Library/Tpm12CommandLib/Tpm12Startup.c

   1 /** @file
   2   Implement TPM1.2 Startup related command.
   3
   4 Copyright (c) 2013, Intel Corporation. All rights reserved. <BR>
   5 This program and the accompanying materials
   6 are licensed and made available under the terms and conditions of the BSD License
   7 which accompanies this distribution.  The full text of the license may be found at
   8 http://opensource.org/licenses/bsd-license.php
   9
  10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include <Uefi.h>
  16 #include <IndustryStandard/Tpm12.h>
  17 #include <Library/BaseMemoryLib.h>
  18 #include <Library/BaseLib.h>
  19 #include <Library/Tpm12DeviceLib.h>
  20
  21 #pragma pack(1)
  22
  23 typedef struct {
  24   TPM_RQU_COMMAND_HDR   Hdr;
  25   TPM_STARTUP_TYPE      TpmSt;
  26 } TPM_CMD_START_UP;
  27
  28 typedef struct {
  29   TPM_RSP_COMMAND_HDR   Hdr;
  30 } TPM_RSP_START_UP;
  31
  32 #pragma pack()
  33
  34 /**
  35   Send Startup command to TPM1.2.
  36
  37   @param TpmSt           Startup Type.
  38
  39   @retval EFI_SUCCESS      Operation completed successfully.
  40   @retval EFI_DEVICE_ERROR Unexpected device behavior.
  41 **/
  42 EFI_STATUS
  43 EFIAPI
  44 Tpm12Startup (
  45   IN TPM_STARTUP_TYPE          TpmSt
  46   )
  47 {
  48   EFI_STATUS                        Status;
  49   UINT32                            TpmRecvSize;
  50   UINT32                            TpmSendSize;
  51   TPM_CMD_START_UP                  SendBuffer;
  52   TPM_RSP_START_UP                  RecvBuffer;
  53   UINT32                            ReturnCode;
  54
  55   //
  56   // send Tpm command TPM_ORD_Startup
  57   //
  58   TpmRecvSize               = sizeof (TPM_RSP_START_UP);
  59   TpmSendSize               = sizeof (TPM_CMD_START_UP);
  60   SendBuffer.Hdr.tag        = SwapBytes16 (TPM_TAG_RQU_COMMAND);
  61   SendBuffer.Hdr.paramSize  = SwapBytes32 (TpmSendSize);
  62   SendBuffer.Hdr.ordinal    = SwapBytes32 (TPM_ORD_Startup);
  63   SendBuffer.TpmSt          = SwapBytes16 (TpmSt);
  64
  65   Status = Tpm12SubmitCommand (TpmSendSize, (UINT8 *)&SendBuffer, &TpmRecvSize, (UINT8 *)&RecvBuffer);
  66   if (EFI_ERROR (Status)) {
  67     return Status;
  68   }
  69   ReturnCode = SwapBytes32(RecvBuffer.Hdr.returnCode);
  70   switch (ReturnCode) {
  71   case TPM_SUCCESS:
  72   case TPM_INVALID_POSTINIT:
  73     // In warm reset, TPM may response TPM_INVALID_POSTINIT
  74     return EFI_SUCCESS;
  75   default:
  76     return EFI_DEVICE_ERROR;
  77   }
  78 }