2 This file declares Stall PPI.
4 This ppi abstracts the blocking stall service to other agents.
6 Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
7 This program and the accompanying materials
8 are licensed and made available under the terms and conditions of the BSD License
9 which accompanies this distribution. The full text of the license may be found at
10 http://opensource.org/licenses/bsd-license.php
12 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
13 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
15 @par Revision Reference:
16 This PPI is introduced in PI Version 1.0.
20 #ifndef __STALL_PPI_H__
21 #define __STALL_PPI_H__
23 #define EFI_PEI_STALL_PPI_GUID \
24 { 0x1f4c6f90, 0xb06b, 0x48d8, {0xa2, 0x01, 0xba, 0xe5, 0xf1, 0xcd, 0x7d, 0x56 } }
26 typedef struct _EFI_PEI_STALL_PPI EFI_PEI_STALL_PPI
;
29 The Stall() function provides a blocking stall for at least the number
30 of microseconds stipulated in the final argument of the API.
32 @param PeiServices An indirect pointer to the PEI Services Table
33 published by the PEI Foundation.
34 @param This Pointer to the local data for the interface.
35 @param Microseconds Number of microseconds for which to stall.
37 @retval EFI_SUCCESS The service provided at least the required delay.
42 (EFIAPI
*EFI_PEI_STALL
)(
43 IN CONST EFI_PEI_SERVICES
**PeiServices
,
44 IN CONST EFI_PEI_STALL_PPI
*This
,
49 /// This service provides a simple, blocking stall with platform-specific resolution.
51 struct _EFI_PEI_STALL_PPI
{
53 /// The resolution in microseconds of the stall services.
60 extern EFI_GUID gEfiPeiStallPpiGuid
;