106 lines
3.2 KiB
C
106 lines
3.2 KiB
C
/** @file
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Library to install StallPpi.
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@copyright
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INTEL CONFIDENTIAL
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Copyright 2017 Intel Corporation.
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The source code contained or described herein and all documents related to the
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source code ("Material") are owned by Intel Corporation or its suppliers or
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licensors. Title to the Material remains with Intel Corporation or its suppliers
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and licensors. The Material may contain trade secrets and proprietary and
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confidential information of Intel Corporation and its suppliers and licensors,
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and is protected by worldwide copyright and trade secret laws and treaty
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provisions. No part of the Material may be used, copied, reproduced, modified,
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published, uploaded, posted, transmitted, distributed, or disclosed in any way
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without Intel's prior express written permission.
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No license under any patent, copyright, trade secret or other intellectual
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property right is granted to or conferred upon you by disclosure or delivery
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of the Materials, either expressly, by implication, inducement, estoppel or
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otherwise. Any license under such intellectual property rights must be
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express and approved by Intel in writing.
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Unless otherwise agreed by Intel in writing, you may not remove or alter
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this notice or any other notice embedded in Materials by Intel or
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Intel's suppliers or licensors in any way.
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This file contains an 'Intel Peripheral Driver' and is uniquely identified as
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"Intel Reference Module" and is licensed for Intel CPUs and chipsets under
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the terms of your license agreement with Intel or your vendor. This file may
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be modified by the user, subject to additional terms of the license agreement.
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@par Specification Reference:
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**/
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#include <Ppi/Stall.h>
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#include <Library/BaseLib.h>
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#include <Library/DebugLib.h>
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#include <Library/TimerLib.h>
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#include <Library/PeiServicesLib.h>
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#define PEI_STALL_RESOLUTION 1
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/**
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This function provides a blocking stall for reset at least the given number of microseconds
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stipulated in the final argument.
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@param PeiServices General purpose services available to every PEIM.
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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 function provided at least the required stall.
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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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EFI_PEI_STALL_PPI mStallPpi = {
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PEI_STALL_RESOLUTION,
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Stall
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};
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EFI_PEI_PPI_DESCRIPTOR mPeiInstallStallPpi = {
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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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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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MicroSecondDelay (Microseconds);
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return EFI_SUCCESS;
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}
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/**
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This function will install the StallPpi.
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@retval EFI_SUCCESS if StallPpi is installed successfully.
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**/
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EFI_STATUS
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EFIAPI
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InstallStallPpi (
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VOID
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)
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{
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EFI_STATUS Status;
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DEBUG((DEBUG_INFO, "Installing StallPpi \n"));
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Status = PeiServicesInstallPpi (&mPeiInstallStallPpi);
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ASSERT_EFI_ERROR (Status);
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return Status;
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}
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