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878ddf1f | 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, 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 | |
15 | Module Name: Stall.h\r | |
16 | \r | |
17 | @par Revision Reference:\r | |
18 | This PPI is defined in PEI CIS.\r | |
19 | Version 0.91.\r | |
20 | \r | |
21 | **/\r | |
22 | \r | |
23 | #ifndef __STALL_PPI_H__\r | |
24 | #define __STALL_PPI_H__\r | |
25 | \r | |
26 | #define EFI_PEI_STALL_PPI_GUID \\r | |
27 | { \\r | |
28 | 0x1f4c6f90, 0xb06b, 0x48d8, {0xa2, 0x01, 0xba, 0xe5, 0xf1, 0xcd, 0x7d, 0x56 } \\r | |
29 | }\r | |
30 | \r | |
31 | typedef struct _EFI_PEI_STALL_PPI EFI_PEI_STALL_PPI;\r | |
32 | \r | |
33 | /**\r | |
34 | The Stall() function provides a blocking stall for at least the number \r | |
35 | of microseconds stipulated in the final argument of the API.\r | |
36 | \r | |
37 | @param PeiServices An indirect pointer to the PEI Services Table \r | |
38 | published by the PEI Foundation. \r | |
39 | \r | |
40 | @param This Pointer to the local data for the interface.\r | |
41 | \r | |
42 | @param Microseconds Number of microseconds for which to stall.\r | |
43 | \r | |
44 | @retval EFI_SUCCESS The service provided at least the required delay.\r | |
45 | \r | |
46 | **/\r | |
47 | typedef\r | |
48 | EFI_STATUS\r | |
49 | (EFIAPI *EFI_PEI_STALL) (\r | |
50 | IN EFI_PEI_SERVICES **PeiServices,\r | |
51 | IN EFI_PEI_STALL_PPI *This,\r | |
52 | IN UINTN Microseconds\r | |
53 | );\r | |
54 | \r | |
55 | /**\r | |
56 | @par Ppi Description:\r | |
57 | This service provides a simple, blocking stall with platform-specific resolution. \r | |
58 | \r | |
59 | @param Resolution\r | |
60 | The resolution in microseconds of the stall services.\r | |
61 | \r | |
62 | @param Stall\r | |
63 | The actual stall procedure call. \r | |
64 | \r | |
65 | **/\r | |
66 | struct _EFI_PEI_STALL_PPI {\r | |
67 | UINTN Resolution;\r | |
68 | EFI_PEI_STALL Stall;\r | |
69 | };\r | |
70 | \r | |
71 | extern EFI_GUID gEfiPeiStallPpiGuid;\r | |
72 | \r | |
73 | #endif\r |