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/** @file
MicroSecondDelay implementation of ACPI Timer.
Copyright (c) 2007 - 2015, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
--*/
#include "PiPei.h"
#include "I2CAccess.h"
#include "I2CDelayPei.h"
#include <Library/DebugLib.h>
#include <Library/PeiServicesTablePointerLib.h>
#include <Ppi/Stall.h>
/**
Stalls the CPU for at least the given number of microseconds.
Stalls the CPU for the number of microseconds specified by MicroSeconds.
@param MicroSeconds The minimum number of microseconds to delay.
@return EFI_STATUS
**/
EFI_STATUS
EFIAPI
MicroSecondDelay (
IN UINTN MicroSeconds
)
{
EFI_PEI_STALL_PPI *StallPpi;
EFI_STATUS Status;
CONST EFI_PEI_SERVICES **PeiServices;
PeiServices = GetPeiServicesTablePointer();
Status = (**PeiServices).LocatePpi (PeiServices, &gEfiPeiStallPpiGuid, 0, NULL, &StallPpi);
ASSERT(!EFI_ERROR(Status));
StallPpi->Stall (PeiServices, StallPpi, MicroSeconds);
return EFI_SUCCESS;
}
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