IntelFspWrapperPkg: Replace BSD License with BSD+Patent License

[mirror_edk2.git] / IntelFspWrapperPkg / Library / SecPeiFspPlatformSecLibSample / SaveSecContext.c

/** @file\r
  Sample to provide SaveSecContext function.\r
\r
  Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
\r
#include <PiPei.h>\r
#include <Library/DebugLib.h>\r
\r
#include <Ppi/TopOfTemporaryRam.h>\r
#include <Ppi/SecPlatformInformation.h>\r
\r
/**\r
  Save BIST value before call FspInit.\r
\r
  @param[in] Bist   BIST value.\r
**/\r
VOID\r
AsmSaveBistValue (\r
  IN UINT32  Bist\r
  );\r
\r
/**\r
  Save Ticker value before call FspInit.\r
\r
  @param[in] Ticker   Ticker value.\r
**/\r
VOID\r
AsmSaveTickerValue (\r
  IN UINT64  Ticker\r
  );\r
\r
/**\r
  Save SEC context before call FspInit.\r
\r
  @param[in] PeiServices  Pointer to PEI Services Table.\r
**/\r
VOID\r
EFIAPI\r
SaveSecContext (\r
  IN CONST EFI_PEI_SERVICES                     **PeiServices\r
  )\r
{\r
  UINT32      *Bist;\r
  UINT64      *Ticker;\r
  UINT32      Size;\r
  UINT32      Count;\r
  UINT32      TopOfTemporaryRam;\r
  VOID        *TopOfTemporaryRamPpi;\r
  EFI_STATUS  Status;\r
\r
  DEBUG ((DEBUG_INFO, "SaveSecContext - 0x%x\n", PeiServices));\r
\r
  Status = (*PeiServices)->LocatePpi (\r
                             PeiServices,\r
                             &gTopOfTemporaryRamPpiGuid,\r
                             0,\r
                             NULL,\r
                             (VOID **) &TopOfTemporaryRamPpi\r
                             );\r
  if (EFI_ERROR (Status)) {\r
    return ;\r
  }\r
\r
  DEBUG ((DEBUG_INFO, "TopOfTemporaryRamPpi - 0x%x\n", TopOfTemporaryRamPpi));\r
\r
  //\r
  // The entries of BIST information, together with the number of them,\r
  // reside in the bottom of stack, left untouched by normal stack operation.\r
  // This routine copies the BIST information to the buffer pointed by\r
  // PlatformInformationRecord for output.\r
  //\r
  // |--------------| <- TopOfTemporaryRam\r
  // |Number of BSPs|\r
  // |--------------|\r
  // |     BIST     |\r
  // |--------------|\r
  // |     ....     |\r
  // |--------------|\r
  // |  TSC[63:32]  |\r
  // |--------------|\r
  // |  TSC[31:00]  |\r
  // |--------------|\r
  //\r
\r
  TopOfTemporaryRam = (UINT32)(UINTN)TopOfTemporaryRamPpi - sizeof(UINT32);\r
  TopOfTemporaryRam -= sizeof(UINT32) * 2;\r
  DEBUG ((DEBUG_INFO, "TopOfTemporaryRam - 0x%x\n", TopOfTemporaryRam));\r
  Count             = *(UINT32 *)(UINTN)(TopOfTemporaryRam - sizeof(UINT32));\r
  DEBUG ((DEBUG_INFO, "Count - 0x%x\n", Count));\r
  Size              = Count * sizeof (IA32_HANDOFF_STATUS);\r
  DEBUG ((DEBUG_INFO, "Size - 0x%x\n", Size));\r
\r
  Bist   = (UINT32 *)(UINTN)(TopOfTemporaryRam - sizeof(UINT32) - Size);\r
  DEBUG ((DEBUG_INFO, "Bist - 0x%x\n", *Bist));\r
  Ticker = (UINT64 *)(UINTN)(TopOfTemporaryRam - sizeof(UINT32) - Size - sizeof(UINT64));\r
  DEBUG ((DEBUG_INFO, "Ticker - 0x%lx\n", *Ticker));\r
\r
  // Just need record BSP\r
  AsmSaveBistValue (*Bist);\r
  AsmSaveTickerValue (*Ticker);\r
}\r