| Vishal Bhoj | 82c8071 | 2015-12-15 21:13:33 +0530 | [diff] [blame^] | 1 | /**@file
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| 2 | EFI_PEI_STALL implementation for NT32 simulation environment.
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| 3 |
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| 4 | Copyright (c) 2009 - 2013, Intel Corporation. All rights reserved.<BR>
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| 5 | This program and the accompanying materials
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| 6 | are licensed and made available under the terms and conditions of the BSD License
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| 7 | which accompanies this distribution. The full text of the license may be found at
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| 8 | http://opensource.org/licenses/bsd-license.php
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| 9 |
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| 10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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| 11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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| 12 |
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| 13 | **/
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| 14 | #include "WinNtPeim.h"
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| 15 |
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| 16 | #include <Ppi/NtThunk.h>
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| 17 | #include <Ppi/Stall.h>
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| 18 | #include <Library/DebugLib.h>
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| 19 |
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| 20 | EFI_STATUS
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| 21 | EFIAPI
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| 22 | Stall (
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| 23 | IN CONST EFI_PEI_SERVICES **PeiServices,
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| 24 | IN CONST EFI_PEI_STALL_PPI *This,
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| 25 | IN UINTN Microseconds
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| 26 | );
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| 27 |
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| 28 | EFI_PEI_STALL_PPI mStallPpi = {1000, Stall};
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| 29 |
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| 30 | EFI_PEI_PPI_DESCRIPTOR mPpiListStall[1] = {
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| 31 | {
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| 32 | (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
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| 33 | &gEfiPeiStallPpiGuid,
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| 34 | &mStallPpi
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| 35 | }
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| 36 | };
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| 37 |
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| 38 |
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| 39 | /**
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| 40 | PEIM's entry point.
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| 41 |
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| 42 | This routine installs the simulation instance of EFI_PEI_STALL_PPI based
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| 43 | on Win API Sleep().
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| 44 |
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| 45 | @param FileHandle Handle of the file being invoked.
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| 46 | @param PeiServices Describes the list of possible PEI Services.
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| 47 |
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| 48 | @retval EFI_SUCCESS The PEIM executed normally.
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| 49 | @retval !EFI_SUCCESS The PEIM failed to execute normally.
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| 50 | **/
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| 51 | EFI_STATUS
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| 52 | EFIAPI
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| 53 | InitializeStall (
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| 54 | IN EFI_PEI_FILE_HANDLE FileHandle,
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| 55 | IN CONST EFI_PEI_SERVICES **PeiServices
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| 56 | )
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| 57 | {
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| 58 | EFI_STATUS Status;
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| 59 | Status = (*PeiServices)->InstallPpi (PeiServices, &mPpiListStall[0]);
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| 60 | ASSERT_EFI_ERROR (Status);
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| 61 |
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| 62 | return Status;
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| 63 | }
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| 64 |
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| 65 | /**
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| 66 | The Stall() function provides a blocking stall for at least the number
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| 67 | of microseconds stipulated in the final argument of the API.
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| 68 |
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| 69 | @param PeiServices An indirect pointer to the PEI Services Table
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| 70 | published by the PEI Foundation.
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| 71 | @param This Pointer to the local data for the interface.
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| 72 | @param Microseconds Number of microseconds for which to stall.
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| 73 |
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| 74 | @retval EFI_SUCCESS The service provided at least the required delay.
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| 75 |
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| 76 | **/
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| 77 | EFI_STATUS
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| 78 | EFIAPI
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| 79 | Stall (
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| 80 | IN CONST EFI_PEI_SERVICES **PeiServices,
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| 81 | IN CONST EFI_PEI_STALL_PPI *This,
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| 82 | IN UINTN Microseconds
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| 83 | )
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| 84 | {
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| 85 | EFI_STATUS Status;
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| 86 | PEI_NT_THUNK_PPI *PeiNtService;
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| 87 | EFI_WIN_NT_THUNK_PROTOCOL *NtThunk;
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| 88 |
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| 89 | Status = (**PeiServices).LocatePpi (
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| 90 | (const EFI_PEI_SERVICES **)PeiServices,
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| 91 | &gPeiNtThunkPpiGuid,
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| 92 | 0,
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| 93 | NULL,
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| 94 | (VOID**)&PeiNtService
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| 95 | );
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| 96 | ASSERT_EFI_ERROR (Status);
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| 97 |
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| 98 | //
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| 99 | // Calculate the time to sleep. Win API smallest unit to sleep is 1 millisec
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| 100 | // so micro second units need be divided by 1000 to convert to ms
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| 101 | //
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| 102 | NtThunk = (EFI_WIN_NT_THUNK_PROTOCOL*) PeiNtService->NtThunk();
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| 103 | NtThunk->Sleep ((DWORD)((Microseconds + 999) / 1000));
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| 104 |
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| 105 | return EFI_SUCCESS;
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| 106 | }
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