/** @file | |
Sample to provide SecGetPerformance 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 <Ppi/SecPerformance.h> | |
#include <Ppi/TopOfTemporaryRam.h> | |
#include <Library/BaseMemoryLib.h> | |
#include <Library/TimerLib.h> | |
#include <Library/DebugLib.h> | |
/** | |
This interface conveys performance information out of the Security (SEC) phase into PEI. | |
This service is published by the SEC phase. The SEC phase handoff has an optional | |
EFI_PEI_PPI_DESCRIPTOR list as its final argument when control is passed from SEC into the | |
PEI Foundation. As such, if the platform supports collecting performance data in SEC, | |
this information is encapsulated into the data structure abstracted by this service. | |
This information is collected for the boot-strap processor (BSP) on IA-32. | |
@param[in] PeiServices The pointer to the PEI Services Table. | |
@param[in] This The pointer to this instance of the PEI_SEC_PERFORMANCE_PPI. | |
@param[out] Performance The pointer to performance data collected in SEC phase. | |
@retval EFI_SUCCESS The data was successfully returned. | |
**/ | |
EFI_STATUS | |
EFIAPI | |
SecGetPerformance ( | |
IN CONST EFI_PEI_SERVICES **PeiServices, | |
IN PEI_SEC_PERFORMANCE_PPI *This, | |
OUT FIRMWARE_SEC_PERFORMANCE *Performance | |
) | |
{ | |
UINT32 Size; | |
UINT32 Count; | |
UINT32 TopOfTemporaryRam; | |
UINT64 Ticker; | |
VOID *TopOfTemporaryRamPpi; | |
EFI_STATUS Status; | |
DEBUG ((DEBUG_INFO, "SecGetPerformance\n")); | |
Status = (*PeiServices)->LocatePpi ( | |
PeiServices, | |
&gTopOfTemporaryRamPpiGuid, | |
0, | |
NULL, | |
(VOID **) &TopOfTemporaryRamPpi | |
); | |
if (EFI_ERROR (Status)) { | |
return EFI_NOT_FOUND; | |
} | |
// | |
// |--------------| <- TopOfTemporaryRam | |
// |Number of BSPs| | |
// |--------------| | |
// | BIST | | |
// |--------------| | |
// | .... | | |
// |--------------| | |
// | TSC[63:32] | | |
// |--------------| | |
// | TSC[31:00] | | |
// |--------------| | |
// | |
TopOfTemporaryRam = (UINT32)(UINTN)TopOfTemporaryRamPpi - sizeof(UINT32); | |
TopOfTemporaryRam -= sizeof(UINT32) * 2; | |
Count = *(UINT32 *) (UINTN) (TopOfTemporaryRam - sizeof (UINT32)); | |
Size = Count * sizeof (UINT64); | |
Ticker = *(UINT64 *) (UINTN) (TopOfTemporaryRam - sizeof (UINT32) - Size - sizeof (UINT32) * 2); | |
Performance->ResetEnd = GetTimeInNanoSecond (Ticker); | |
return EFI_SUCCESS; | |
} |