Vlv2TbltDevicePkg: Replace BSD License with BSD+Patent License

[mirror_edk2.git] / Vlv2TbltDevicePkg / Library / I2CLibPei / I2CDelayPei.c

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