/** @file
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Library to install StallPpi.
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Copyright (c) 2019 Intel Corporation. All rights reserved. <BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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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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