UefiCpuPkg: Move AsmRelocateApLoopStart from Mpfuncs.nasm to AmdSev.nasm

[mirror_edk2.git] / SecurityPkg / Library / Tpm2DeviceLibDTpm / Tpm2DeviceLibDTpmBase.c

/** @file\r
  This file abstract internal interfaces of which implementation differs per library instance.\r
\r
Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved. <BR>\r
Copyright (c) Microsoft Corporation.\r
SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include <Library/Tpm2DeviceLib.h>\r
#include <Library/PcdLib.h>\r
\r
#include "Tpm2DeviceLibDTpm.h"\r
\r
/**\r
  Return cached PTP CRB interface IdleByPass state.\r
\r
  @return Cached PTP CRB interface IdleByPass state.\r
**/\r
UINT8\r
GetCachedIdleByPass (\r
  VOID\r
  )\r
{\r
  return PcdGet8 (PcdCRBIdleByPass);\r
}\r
\r
/**\r
  Return cached PTP interface type.\r
\r
  @return Cached PTP interface type.\r
**/\r
TPM2_PTP_INTERFACE_TYPE\r
GetCachedPtpInterface (\r
  VOID\r
  )\r
{\r
  return PcdGet8 (PcdActiveTpmInterfaceType);\r
}\r
\r
/**\r
  The common function cache current active TpmInterfaceType when needed.\r
\r
  @retval EFI_SUCCESS   DTPM2.0 instance is registered, or system does not support register DTPM2.0 instance\r
**/\r
EFI_STATUS\r
InternalTpm2DeviceLibDTpmCommonConstructor (\r
  VOID\r
  )\r
{\r
  TPM2_PTP_INTERFACE_TYPE  PtpInterface;\r
  UINT8                    IdleByPass;\r
\r
  //\r
  // Cache current active TpmInterfaceType only when needed\r
  //\r
  if (PcdGet8 (PcdActiveTpmInterfaceType) == 0xFF) {\r
    PtpInterface = Tpm2GetPtpInterface ((VOID *)(UINTN)PcdGet64 (PcdTpmBaseAddress));\r
    PcdSet8S (PcdActiveTpmInterfaceType, PtpInterface);\r
  }\r
\r
  if ((PcdGet8 (PcdActiveTpmInterfaceType) == Tpm2PtpInterfaceCrb) && (PcdGet8 (PcdCRBIdleByPass) == 0xFF)) {\r
    IdleByPass = Tpm2GetIdleByPass ((VOID *)(UINTN)PcdGet64 (PcdTpmBaseAddress));\r
    PcdSet8S (PcdCRBIdleByPass, IdleByPass);\r
  }\r
\r
  return EFI_SUCCESS;\r
}\r