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