2 This file declares Stall PPI.
4 This code abstracts the PEI core to provide Stall services.
6 Copyright (c) 2006 - 2007, Intel Corporation
7 All rights reserved. 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 defined in PI.
21 #ifndef __STALL_PPI_H__
22 #define __STALL_PPI_H__
24 #define EFI_PEI_STALL_PPI_GUID \
25 { 0x1f4c6f90, 0xb06b, 0x48d8, {0xa2, 0x01, 0xba, 0xe5, 0xf1, 0xcd, 0x7d, 0x56 } }
27 typedef struct _EFI_PEI_STALL_PPI EFI_PEI_STALL_PPI
;
30 The Stall() function provides a blocking stall for at least the number
31 of microseconds stipulated in the final argument of the API.
33 @param PeiServices An indirect pointer to the PEI Services Table
34 published by the PEI Foundation.
35 @param This Pointer to the local data for the interface.
36 @param Microseconds Number of microseconds for which to stall.
38 @retval EFI_SUCCESS The service provided at least the required delay.
43 (EFIAPI
*EFI_PEI_STALL
) (
44 IN EFI_PEI_SERVICES
**PeiServices
,
45 IN EFI_PEI_STALL_PPI
*This
,
51 This service provides a simple, blocking stall with platform-specific resolution.
54 The resolution in microseconds of the stall services.
57 The actual stall procedure call.
60 struct _EFI_PEI_STALL_PPI
{
65 extern EFI_GUID gEfiPeiStallPpiGuid
;