SecurityPkg/Library/Tpm12CommandLib/Tpm12PhysicalPresence.c

   1 /** @file
   2   Implement TPM1.2 Physical Presence related command.
   3
   4 Copyright (c) 2016, 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 <PiPei.h>
  16 #include <Library/Tpm12CommandLib.h>
  17 #include <Library/BaseLib.h>
  18 #include <Library/DebugLib.h>
  19 #include <Library/Tpm12DeviceLib.h>
  20
  21 #pragma pack(1)
  22
  23 typedef struct {
  24   TPM_RQU_COMMAND_HDR   Hdr;
  25   TPM_PHYSICAL_PRESENCE PhysicalPresence;
  26 } TPM_CMD_PHYSICAL_PRESENCE;
  27
  28 #pragma pack()
  29
  30 /**
  31 Send TSC_PhysicalPresence command to TPM.
  32
  33 @param[in] PhysicalPresence   The state to set the TPMs Physical Presence flags.
  34
  35 @retval EFI_SUCCESS           Operation completed successfully.
  36 @retval EFI_TIMEOUT           The register can't run into the expected status in time.
  37 @retval EFI_BUFFER_TOO_SMALL  Response data buffer is too small.
  38 @retval EFI_DEVICE_ERROR      Unexpected device behavior.
  39
  40 **/
  41 EFI_STATUS
  42 EFIAPI
  43 Tpm12PhysicalPresence (
  44   IN TPM_PHYSICAL_PRESENCE  PhysicalPresence
  45   )
  46 {
  47   TPM_CMD_PHYSICAL_PRESENCE  Command;
  48   TPM_RSP_COMMAND_HDR        Response;
  49   UINT32                     Length;
  50
  51   //
  52   // send Tpm command TSC_ORD_PhysicalPresence
  53   //
  54   Command.Hdr.tag          = SwapBytes16 (TPM_TAG_RQU_COMMAND);
  55   Command.Hdr.paramSize    = SwapBytes32 (sizeof (Command));
  56   Command.Hdr.ordinal      = SwapBytes32 (TSC_ORD_PhysicalPresence);
  57   Command.PhysicalPresence = SwapBytes16 (PhysicalPresence);
  58   Length = sizeof (Response);
  59   return Tpm12SubmitCommand (sizeof (Command), (UINT8 *)&Command, &Length, (UINT8 *)&Response);
  60 }