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5879b875 | 1 | /** @file\r |
2 | This file declares Stall PPI.\r | |
3 | \r | |
d7132512 | 4 | This ppi abstracts the blocking stall service to other agents.\r |
5879b875 | 5 | \r |
9df063a0 HT |
6 | Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r |
7 | This program and the accompanying materials \r | |
5879b875 | 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 |
0047820e | 16 | This PPI is introduced in PI Version 1.0.\r |
5879b875 | 17 | \r |
18 | **/\r | |
19 | \r | |
20 | #ifndef __STALL_PPI_H__\r | |
21 | #define __STALL_PPI_H__\r | |
22 | \r | |
23 | #define EFI_PEI_STALL_PPI_GUID \\r | |
00edb218 | 24 | { 0x1f4c6f90, 0xb06b, 0x48d8, {0xa2, 0x01, 0xba, 0xe5, 0xf1, 0xcd, 0x7d, 0x56 } }\r |
5879b875 | 25 | \r |
26 | typedef struct _EFI_PEI_STALL_PPI EFI_PEI_STALL_PPI;\r | |
27 | \r | |
28 | /**\r | |
29 | The Stall() function provides a blocking stall for at least the number \r | |
30 | of microseconds stipulated in the final argument of the API.\r | |
31 | \r | |
32 | @param PeiServices An indirect pointer to the PEI Services Table\r | |
33 | published by the PEI Foundation.\r | |
34 | @param This Pointer to the local data for the interface.\r | |
35 | @param Microseconds Number of microseconds for which to stall.\r | |
36 | \r | |
d7132512 | 37 | @retval EFI_SUCCESS The service provided at least the required delay.\r |
5879b875 | 38 | \r |
39 | **/\r | |
40 | typedef\r | |
41 | EFI_STATUS\r | |
8b13229b | 42 | (EFIAPI *EFI_PEI_STALL)(\r |
f1b420aa | 43 | IN CONST EFI_PEI_SERVICES **PeiServices,\r |
44 | IN CONST EFI_PEI_STALL_PPI *This,\r | |
5879b875 | 45 | IN UINTN Microseconds\r |
46 | );\r | |
47 | \r | |
13c38031 | 48 | ///\r |
49 | /// This service provides a simple, blocking stall with platform-specific resolution. \r | |
50 | ///\r | |
5879b875 | 51 | struct _EFI_PEI_STALL_PPI {\r |
13c38031 | 52 | ///\r |
53 | /// The resolution in microseconds of the stall services.\r | |
54 | ///\r | |
5879b875 | 55 | UINTN Resolution;\r |
44717a39 | 56 | \r |
5879b875 | 57 | EFI_PEI_STALL Stall;\r |
58 | };\r | |
59 | \r | |
60 | extern EFI_GUID gEfiPeiStallPpiGuid;\r | |
61 | \r | |
62 | #endif\r |