mirror of https://github.com/acidanthera/audk.git
91 lines
3.0 KiB
C
91 lines
3.0 KiB
C
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/** @file
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Sample to provide SecGetPerformance function.
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Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php.
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <PiPei.h>
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#include <Ppi/SecPerformance.h>
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#include <Ppi/TopOfTemporaryRam.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/TimerLib.h>
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#include <Library/DebugLib.h>
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/**
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This interface conveys performance information out of the Security (SEC) phase into PEI.
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This service is published by the SEC phase. The SEC phase handoff has an optional
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EFI_PEI_PPI_DESCRIPTOR list as its final argument when control is passed from SEC into the
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PEI Foundation. As such, if the platform supports collecting performance data in SEC,
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this information is encapsulated into the data structure abstracted by this service.
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This information is collected for the boot-strap processor (BSP) on IA-32.
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@param[in] PeiServices The pointer to the PEI Services Table.
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@param[in] This The pointer to this instance of the PEI_SEC_PERFORMANCE_PPI.
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@param[out] Performance The pointer to performance data collected in SEC phase.
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@retval EFI_SUCCESS The data was successfully returned.
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**/
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EFI_STATUS
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EFIAPI
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SecGetPerformance (
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IN CONST EFI_PEI_SERVICES **PeiServices,
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IN PEI_SEC_PERFORMANCE_PPI *This,
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OUT FIRMWARE_SEC_PERFORMANCE *Performance
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)
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{
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UINT32 Size;
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UINT32 Count;
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UINT32 TopOfTemporaryRam;
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UINT64 Ticker;
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VOID *TopOfTemporaryRamPpi;
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EFI_STATUS Status;
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DEBUG ((DEBUG_INFO, "SecGetPerformance\n"));
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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 EFI_NOT_FOUND;
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}
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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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Count = *(UINT32 *) (UINTN) (TopOfTemporaryRam - sizeof (UINT32));
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Size = Count * sizeof (UINT64);
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Ticker = *(UINT64 *) (UINTN) (TopOfTemporaryRam - sizeof (UINT32) - Size - sizeof (UINT32) * 2);
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Performance->ResetEnd = GetTimeInNanoSecond (Ticker);
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return EFI_SUCCESS;
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}
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