/** @file | |
Sample to provide SaveSecContext function. | |
Copyright (c) 2014, Intel Corporation. All rights reserved.<BR> | |
This program and the accompanying materials | |
are licensed and made available under the terms and conditions of the BSD License | |
which accompanies this distribution. The full text of the license may be found at | |
http://opensource.org/licenses/bsd-license.php. | |
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
**/ | |
#include <PiPei.h> | |
#include <Library/DebugLib.h> | |
#include <Ppi/TopOfTemporaryRam.h> | |
#include <Ppi/SecPlatformInformation.h> | |
/** | |
Save BIST value before call FspInit. | |
@param[in] Bist BIST value. | |
**/ | |
VOID | |
AsmSaveBistValue ( | |
IN UINT32 Bist | |
); | |
/** | |
Save Ticker value before call FspInit. | |
@param[in] Ticker Ticker value. | |
**/ | |
VOID | |
AsmSaveTickerValue ( | |
IN UINT64 Ticker | |
); | |
/** | |
Save SEC context before call FspInit. | |
@param[in] 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); | |
} |