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