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79964ac8 1/** @file\r
8411f1c0 2 Provides the parent dispatch service for the periodical timer SMI source generator.\r
79964ac8 3\r
358e78ed 4 Copyright (c) 2007 - 2009, Intel Corporation\r
79964ac8 5 All rights reserved. This program and the accompanying materials\r
6 are licensed and made available under the terms and conditions of the BSD License\r
7 which accompanies this distribution. The full text of the license may be found at\r
8 http://opensource.org/licenses/bsd-license.php\r
9\r
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
12\r
13 Module Name: SmmPeriodicTimerDispatch.h\r
14\r
15 @par Revision Reference:\r
16 This Protocol is defined in Framework of EFI SMM Core Interface Spec\r
17 Version 0.9.\r
18\r
19**/\r
20\r
21#ifndef _EFI_SMM_PERIODIC_TIMER_DISPATCH_H_\r
22#define _EFI_SMM_PERIODIC_TIMER_DISPATCH_H_\r
23\r
b80fbe85 24\r
79964ac8 25//\r
26// Global ID for the Periodic Timer SMI Protocol\r
27//\r
28#define EFI_SMM_PERIODIC_TIMER_DISPATCH_PROTOCOL_GUID \\r
29 { \\r
30 0x9cca03fc, 0x4c9e, 0x4a19, {0x9b, 0x6, 0xed, 0x7b, 0x47, 0x9b, 0xde, 0x55 } \\r
31 }\r
32\r
33typedef struct _EFI_SMM_PERIODIC_TIMER_DISPATCH_PROTOCOL EFI_SMM_PERIODIC_TIMER_DISPATCH_PROTOCOL;\r
34\r
35//\r
36// Related Definitions\r
37//\r
358e78ed 38\r
79964ac8 39typedef struct {\r
358e78ed 40 ///\r
41 /// The minimum period of time in 100 nanosecond units that child gets called.\r
42 /// The child will be called back after a time greater than the time Period.\r
43 ///\r
79964ac8 44 UINT64 Period;\r
358e78ed 45 ///\r
46 /// The period of time interval between SMIs. Children of this interface\r
47 /// should use this field when registering for periodic timer intervals when a finer\r
48 /// granularity periodic SMI is desired. Valid values for this field are those returned\r
49 /// by GetNextInterval. A value of 0 indicates the parent is allowed to use any SMI\r
50 /// interval period to satisfy the requested period.\r
51 ///\r
79964ac8 52 UINT64 SmiTickInterval;\r
358e78ed 53 ///\r
54 /// The actual time in 100 nanosecond units elapsed since last called, a\r
55 /// value of 0 indicates an unknown amount of time.\r
56 ///\r
79964ac8 57 UINT64 ElapsedTime;\r
58} EFI_SMM_PERIODIC_TIMER_DISPATCH_CONTEXT;\r
59\r
60//\r
61// Member functions\r
62//\r
63/**\r
64 Dispatch function for a Periodic Timer SMI handler.\r
65\r
66 @param DispatchHandle Handle of this dispatch function.\r
67 @param DispatchContext Pointer to the dispatch function's context.\r
68 The DispatchContext fields are filled in\r
69 by the dispatching driver prior to\r
70 invoking this dispatch function.\r
71\r
700a7869 72 @return None\r
79964ac8 73\r
74**/\r
75typedef\r
76VOID\r
69686d56 77(EFIAPI *EFI_SMM_PERIODIC_TIMER_DISPATCH)(\r
700a7869 78 IN EFI_HANDLE DispatchHandle,\r
79 IN EFI_SMM_PERIODIC_TIMER_DISPATCH_CONTEXT *DispatchContext\r
79964ac8 80 );\r
81\r
82/**\r
83 Returns the next SMI tick period supported by the chipset. The order\r
84 returned is from longest to shortest interval period.\r
85\r
86 @param This Protocol instance pointer.\r
87 @param SmiTickInterval Pointer to pointer of next shorter SMI interval\r
88 period supported by the child. This parameter works as a get-first,\r
89 get-next field.The first time this function is called, *SmiTickInterval\r
90 should be set to NULL to get the longest SMI interval.The returned\r
91 *SmiTickInterval should be passed in on subsequent calls to get the\r
92 next shorter interval period until *SmiTickInterval = NULL.\r
93\r
94 @retval EFI_SUCCESS The service returned successfully.\r
95\r
96**/\r
97typedef\r
98EFI_STATUS\r
69686d56 99(EFIAPI *EFI_SMM_PERIODIC_TIMER_INTERVAL)(\r
79964ac8 100 IN EFI_SMM_PERIODIC_TIMER_DISPATCH_PROTOCOL *This,\r
101 IN OUT UINT64 **SmiTickInterval\r
102 );\r
103\r
104/**\r
105 Register a child SMI source dispatch function with a parent SMM driver\r
106\r
700a7869 107 @param This Pointer to the EFI_SMM_PERIODIC_TIMER_DISPATCH_PROTOCOL instance.\r
108 @param DispatchFunction Function to install.\r
79964ac8 109 @param DispatchContext Pointer to the dispatch function's context.\r
110 The caller fills this context in before calling\r
111 the register function to indicate to the register\r
112 function the period at which the dispatch function\r
113 should be invoked.\r
700a7869 114 @param DispatchHandle Handle generated by the dispatcher to track the function instance.\r
79964ac8 115\r
116 @retval EFI_SUCCESS The dispatch function has been successfully\r
117 registered and the SMI source has been enabled.\r
118 @retval EFI_DEVICE_ERROR The driver was unable to enable the SMI source.\r
119 @retval EFI_OUT_OF_RESOURCES Not enough memory (system or SMM) to manage this\r
120 child.\r
121 @retval EFI_INVALID_PARAMETER DispatchContext is invalid. The period input value\r
122 is not within valid range.\r
123\r
124**/\r
125typedef\r
126EFI_STATUS\r
69686d56 127(EFIAPI *EFI_SMM_PERIODIC_TIMER_REGISTER)(\r
700a7869 128 IN EFI_SMM_PERIODIC_TIMER_DISPATCH_PROTOCOL *This,\r
129 IN EFI_SMM_PERIODIC_TIMER_DISPATCH DispatchFunction,\r
130 IN EFI_SMM_PERIODIC_TIMER_DISPATCH_CONTEXT *DispatchContext,\r
131 OUT EFI_HANDLE *DispatchHandle\r
79964ac8 132 );\r
133\r
134/**\r
700a7869 135 Unregisters a periodic timer service.\r
79964ac8 136\r
700a7869 137 @param This Pointer to the EFI_SMM_PERIODIC_TIMER_DISPATCH_PROTOCOL instance.\r
138 @param DispatchHandle Handle of the service to remove.\r
79964ac8 139\r
140 @retval EFI_SUCCESS The dispatch function has been successfully\r
141 unregistered and the SMI source has been disabled\r
142 if there are no other registered child dispatch\r
143 functions for this SMI source.\r
144 @retval EFI_INVALID_PARAMETER Handle is invalid.\r
145\r
146**/\r
147typedef\r
148EFI_STATUS\r
69686d56 149(EFIAPI *EFI_SMM_PERIODIC_TIMER_UNREGISTER)(\r
700a7869 150 IN EFI_SMM_PERIODIC_TIMER_DISPATCH_PROTOCOL *This,\r
151 IN EFI_HANDLE DispatchHandle\r
79964ac8 152 );\r
153\r
154//\r
155// Interface structure for the SMM Periodic Timer Dispatch Protocol\r
156//\r
157/**\r
79964ac8 158 Provides the parent dispatch service for the periodical timer SMI source generator.\r
79964ac8 159**/\r
160struct _EFI_SMM_PERIODIC_TIMER_DISPATCH_PROTOCOL {\r
2bbaeb0d 161 ///\r
162 /// Installs a child service to be dispatched by this protocol.\r
163 ///\r
79964ac8 164 EFI_SMM_PERIODIC_TIMER_REGISTER Register;\r
2bbaeb0d 165 \r
166 ///\r
167 /// Removes a child service dispatched by this protocol.\r
168 ///\r
79964ac8 169 EFI_SMM_PERIODIC_TIMER_UNREGISTER UnRegister;\r
2bbaeb0d 170 \r
171 ///\r
172 /// Returns the next SMI tick period that is supported by the chipset.\r
173 ///\r
79964ac8 174 EFI_SMM_PERIODIC_TIMER_INTERVAL GetNextShorterInterval;\r
175};\r
176\r
177extern EFI_GUID gEfiSmmPeriodicTimerDispatchProtocolGuid;\r
178\r
179#endif\r