mirror of https://github.com/acidanthera/audk.git
74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
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/** @file
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This file declares Stall PPI.
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This code abstracts the PEI core to provide Stall services.
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Copyright (c) 2006, 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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Module Name: Stall.h
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@par Revision Reference:
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This PPI is defined in PEI CIS.
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Version 0.91.
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**/
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#ifndef __STALL_PPI_H__
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#define __STALL_PPI_H__
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#define EFI_PEI_STALL_PPI_GUID \
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{ \
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0x1f4c6f90, 0xb06b, 0x48d8, {0xa2, 0x01, 0xba, 0xe5, 0xf1, 0xcd, 0x7d, 0x56 } \
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}
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typedef struct _EFI_PEI_STALL_PPI EFI_PEI_STALL_PPI;
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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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typedef
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EFI_STATUS
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(EFIAPI *EFI_PEI_STALL) (
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IN EFI_PEI_SERVICES **PeiServices,
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IN EFI_PEI_STALL_PPI *This,
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IN UINTN Microseconds
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);
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/**
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@par Ppi Description:
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This service provides a simple, blocking stall with platform-specific resolution.
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@param Resolution
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The resolution in microseconds of the stall services.
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@param Stall
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The actual stall procedure call.
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**/
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struct _EFI_PEI_STALL_PPI {
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UINTN Resolution;
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EFI_PEI_STALL Stall;
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};
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extern EFI_GUID gEfiPeiStallPpiGuid;
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#endif
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