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