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5879b875 1/** @file\r
2 This file declares Stall PPI.\r
3\r
4 This code abstracts the PEI core to provide Stall services.\r
5\r
6 Copyright (c) 2006 - 2007, Intel Corporation \r
7 All rights reserved. This program and the accompanying materials \r
8 are licensed and made available under the terms and conditions of the BSD License \r
9 which accompanies this distribution. The full text of the license may be found at \r
10 http://opensource.org/licenses/bsd-license.php \r
11\r
12 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
13 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r
14\r
5879b875 15 @par Revision Reference:\r
16 This PPI is defined in PI.\r
17 Version 1.00.\r
18\r
19**/\r
20\r
21#ifndef __STALL_PPI_H__\r
22#define __STALL_PPI_H__\r
23\r
24#define EFI_PEI_STALL_PPI_GUID \\r
00edb218 25 { 0x1f4c6f90, 0xb06b, 0x48d8, {0xa2, 0x01, 0xba, 0xe5, 0xf1, 0xcd, 0x7d, 0x56 } }\r
5879b875 26\r
27typedef struct _EFI_PEI_STALL_PPI EFI_PEI_STALL_PPI;\r
28\r
29/**\r
30 The Stall() function provides a blocking stall for at least the number \r
31 of microseconds stipulated in the final argument of the API.\r
32\r
33 @param PeiServices An indirect pointer to the PEI Services Table\r
34 published by the PEI Foundation.\r
35 @param This Pointer to the local data for the interface.\r
36 @param Microseconds Number of microseconds for which to stall.\r
37\r
38 @retval EFI_SUCCESS The service provided at least the required delay.\r
39\r
40**/\r
41typedef\r
42EFI_STATUS\r
8b13229b 43(EFIAPI *EFI_PEI_STALL)(\r
5879b875 44 IN EFI_PEI_SERVICES **PeiServices,\r
45 IN EFI_PEI_STALL_PPI *This,\r
46 IN UINTN Microseconds\r
47 );\r
48\r
49/**\r
50 @par Ppi Description:\r
51 This service provides a simple, blocking stall with platform-specific resolution. \r
52\r
53 @param Resolution\r
54 The resolution in microseconds of the stall services.\r
55\r
56 @param Stall\r
57 The actual stall procedure call. \r
58\r
59**/\r
60struct _EFI_PEI_STALL_PPI {\r
61 UINTN Resolution;\r
62 EFI_PEI_STALL Stall;\r
63};\r
64\r
65extern EFI_GUID gEfiPeiStallPpiGuid;\r
66\r
67#endif\r