Nt32Pkg: Replace BSD License with BSD+Patent License

[mirror_edk2.git] / Nt32Pkg / StallPei / Stall.c

/**@file\r
  EFI_PEI_STALL implementation for NT32 simulation environment.\r
  \r
Copyright (c) 2009 - 2013, Intel Corporation. All rights reserved.<BR>\r
SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
#include "WinNtPeim.h"\r
\r
#include <Ppi/NtThunk.h>\r
#include <Ppi/Stall.h>\r
#include <Library/DebugLib.h>\r
\r
EFI_STATUS\r
EFIAPI \r
Stall (\r
  IN CONST EFI_PEI_SERVICES     **PeiServices,\r
  IN CONST EFI_PEI_STALL_PPI    *This,\r
  IN UINTN                      Microseconds\r
  );\r
  \r
EFI_PEI_STALL_PPI mStallPpi = {1000, Stall};\r
\r
EFI_PEI_PPI_DESCRIPTOR  mPpiListStall[1] = {\r
  {\r
    (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),\r
    &gEfiPeiStallPpiGuid,\r
    &mStallPpi\r
  }\r
};\r
\r
\r
/**\r
  PEIM's entry point.\r
  \r
  This routine installs the simulation instance of EFI_PEI_STALL_PPI based\r
  on Win API Sleep().\r
  \r
  @param  FileHandle  Handle of the file being invoked. \r
  @param  PeiServices Describes the list of possible PEI Services.\r
\r
  @retval  EFI_SUCCESS   The PEIM executed normally.\r
  @retval  !EFI_SUCCESS  The PEIM failed to execute normally.\r
**/\r
EFI_STATUS\r
EFIAPI\r
InitializeStall (\r
  IN       EFI_PEI_FILE_HANDLE  FileHandle,\r
  IN CONST EFI_PEI_SERVICES     **PeiServices\r
  )\r
{\r
  EFI_STATUS  Status;\r
  Status = (*PeiServices)->InstallPpi (PeiServices, &mPpiListStall[0]);\r
  ASSERT_EFI_ERROR (Status);\r
\r
  return Status;\r
}\r
\r
/**\r
  The Stall() function provides a blocking stall for at least the number \r
  of microseconds stipulated in the final argument of the API.\r
\r
  @param  PeiServices    An indirect pointer to the PEI Services Table\r
                         published by the PEI Foundation.\r
  @param  This           Pointer to the local data for the interface.\r
  @param  Microseconds   Number of microseconds for which to stall.\r
\r
  @retval EFI_SUCCESS    The service provided at least the required delay.\r
\r
**/\r
EFI_STATUS\r
EFIAPI \r
Stall (\r
  IN CONST EFI_PEI_SERVICES     **PeiServices,\r
  IN CONST EFI_PEI_STALL_PPI    *This,\r
  IN UINTN                      Microseconds\r
  )\r
{\r
  EFI_STATUS                Status;\r
  PEI_NT_THUNK_PPI          *PeiNtService;\r
  EFI_WIN_NT_THUNK_PROTOCOL *NtThunk;\r
  \r
  Status = (**PeiServices).LocatePpi (\r
                            (const EFI_PEI_SERVICES **)PeiServices,\r
                            &gPeiNtThunkPpiGuid,\r
                            0,                  \r
                            NULL,\r
                            (VOID**)&PeiNtService\r
                            );\r
  ASSERT_EFI_ERROR (Status);\r
    \r
  //\r
  // Calculate the time to sleep.  Win API smallest unit to sleep is 1 millisec\r
  // so micro second units need be divided by 1000 to convert to ms\r
  //\r
  NtThunk = (EFI_WIN_NT_THUNK_PROTOCOL*) PeiNtService->NtThunk();\r
  NtThunk->Sleep ((DWORD)((Microseconds + 999) / 1000)); \r
  \r
  return EFI_SUCCESS;\r
}\r