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- /** @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.<BR>
- SPDX-License-Identifier: BSD-2-Clause-Patent
- **/
- #include <PiPei.h>
- #include <Library/DebugLib.h>
- #include <Ppi/TopOfTemporaryRam.h>
- #include <Ppi/SecPlatformInformation.h>
- /**
- 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);
- }
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