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83632987 | 1 | /** @file\r |
2 | SMM Software Dispatch Protocol as defined in PI 1.2 Specification\r | |
3 | Volume 4 System Management Mode Core Interface.\r | |
4 | \r | |
5 | This protocol provides the parent dispatch service for a given SMI source generator.\r | |
6 | \r | |
98a1f1e5 | 7 | Copyright (c) 2009 - 2012, Intel Corporation. All rights reserved.<BR>\r |
9df063a0 | 8 | This program and the accompanying materials\r |
83632987 | 9 | are licensed and made available under the terms and conditions of the BSD License\r |
10 | which accompanies this distribution. The full text of the license may be found at\r | |
11 | http://opensource.org/licenses/bsd-license.php\r | |
12 | \r | |
13 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
14 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
15 | \r | |
16 | **/\r | |
17 | \r | |
18 | #ifndef _SMM_SW_DISPATCH2_H_\r | |
19 | #define _SMM_SW_DISPATCH2_H_\r | |
20 | \r | |
21 | #include <Pi/PiSmmCis.h>\r | |
22 | \r | |
23 | #define EFI_SMM_SW_DISPATCH2_PROTOCOL_GUID \\r | |
24 | { \\r | |
25 | 0x18a3c6dc, 0x5eea, 0x48c8, {0xa1, 0xc1, 0xb5, 0x33, 0x89, 0xf9, 0x89, 0x99 } \\r | |
26 | }\r | |
27 | \r | |
28 | ///\r | |
29 | /// A particular chipset may not support all possible software SMI input values.\r | |
30 | /// For example, the ICH supports only values 00h to 0FFh. The parent only allows a single\r | |
31 | /// child registration for each SwSmiInputValue.\r | |
32 | ///\r | |
33 | typedef struct {\r | |
34 | UINTN SwSmiInputValue;\r | |
35 | } EFI_SMM_SW_REGISTER_CONTEXT;\r | |
36 | \r | |
37 | ///\r | |
38 | /// The DispatchFunction will be called with Context set to the same value as was passed into \r | |
39 | /// this function in RegisterContext and with CommBuffer (and CommBufferSize) pointing\r | |
40 | /// to an instance of EFI_SMM_SW_CONTEXT indicating the index of the CPU which generated the \r | |
41 | /// software SMI.\r | |
42 | ///\r | |
43 | typedef struct {\r | |
44 | ///\r | |
45 | /// The 0-based index of the CPU which generated the software SMI.\r | |
46 | ///\r | |
47 | UINTN SwSmiCpuIndex;\r | |
48 | ///\r | |
49 | /// This value corresponds directly to the CommandPort parameter used in the call to Trigger().\r | |
50 | ///\r | |
51 | UINT8 CommandPort;\r | |
52 | ///\r | |
53 | /// This value corresponds directly to the DataPort parameter used in the call to Trigger().\r | |
54 | ///\r | |
55 | UINT8 DataPort;\r | |
56 | } EFI_SMM_SW_CONTEXT;\r | |
57 | \r | |
58 | typedef struct _EFI_SMM_SW_DISPATCH2_PROTOCOL EFI_SMM_SW_DISPATCH2_PROTOCOL;\r | |
59 | \r | |
60 | /**\r | |
61 | Register a child SMI source dispatch function for the specified software SMI.\r | |
62 | \r | |
63 | This service registers a function (DispatchFunction) which will be called when the software \r | |
64 | SMI source specified by RegisterContext->SwSmiCpuIndex is detected. On return, \r | |
65 | DispatchHandle contains a unique handle which may be used later to unregister the function \r | |
66 | using UnRegister().\r | |
67 | \r | |
36e8c955 | 68 | @param[in] This Pointer to the EFI_SMM_SW_DISPATCH2_PROTOCOL instance.\r |
69 | @param[in] DispatchFunction Function to register for handler when the specified software \r | |
70 | SMI is generated. \r | |
71 | @param[in, out] RegisterContext Pointer to the dispatch function's context.\r | |
72 | The caller fills this context in before calling\r | |
73 | the register function to indicate to the register\r | |
74 | function which Software SMI input value the\r | |
75 | dispatch function should be invoked for.\r | |
76 | @param[out] DispatchHandle Handle generated by the dispatcher to track the\r | |
77 | function instance.\r | |
83632987 | 78 | \r |
79 | @retval EFI_SUCCESS The dispatch function has been successfully\r | |
80 | registered and the SMI source has been enabled.\r | |
81 | @retval EFI_DEVICE_ERROR The SW driver was unable to enable the SMI source.\r | |
82 | @retval EFI_INVALID_PARAMETER RegisterContext is invalid. The SW SMI input value\r | |
83 | is not within valid range.\r | |
84 | @retval EFI_OUT_OF_RESOURCES There is not enough memory (system or SMM) to manage this\r | |
85 | child.\r | |
86 | @retval EFI_OUT_OF_RESOURCES A unique software SMI value could not be assigned\r | |
87 | for this dispatch.\r | |
88 | **/\r | |
89 | typedef\r | |
90 | EFI_STATUS\r | |
a2bb197e | 91 | (EFIAPI *EFI_SMM_SW_REGISTER2)(\r |
83632987 | 92 | IN CONST EFI_SMM_SW_DISPATCH2_PROTOCOL *This,\r |
93 | IN EFI_SMM_HANDLER_ENTRY_POINT2 DispatchFunction,\r | |
36e8c955 | 94 | IN OUT EFI_SMM_SW_REGISTER_CONTEXT *RegisterContext,\r |
83632987 | 95 | OUT EFI_HANDLE *DispatchHandle\r |
96 | );\r | |
97 | \r | |
98 | /**\r | |
99 | Unregister a child SMI source dispatch function for the specified software SMI.\r | |
100 | \r | |
101 | This service removes the handler associated with DispatchHandle so that it will no longer be \r | |
102 | called in response to a software SMI.\r | |
103 | \r | |
104 | @param[in] This Pointer to the EFI_SMM_SW_DISPATCH2_PROTOCOL instance.\r | |
105 | @param[in] DispatchHandle Handle of dispatch function to deregister.\r | |
106 | \r | |
107 | @retval EFI_SUCCESS The dispatch function has been successfully unregistered.\r | |
108 | @retval EFI_INVALID_PARAMETER The DispatchHandle was not valid.\r | |
109 | **/\r | |
110 | typedef\r | |
111 | EFI_STATUS\r | |
a2bb197e | 112 | (EFIAPI *EFI_SMM_SW_UNREGISTER2)(\r |
83632987 | 113 | IN CONST EFI_SMM_SW_DISPATCH2_PROTOCOL *This,\r |
114 | IN EFI_HANDLE DispatchHandle\r | |
115 | );\r | |
116 | \r | |
117 | ///\r | |
118 | /// Interface structure for the SMM Software SMI Dispatch Protocol.\r | |
119 | ///\r | |
120 | /// The EFI_SMM_SW_DISPATCH2_PROTOCOL provides the ability to install child handlers for the \r | |
121 | /// given software. These handlers will respond to software interrupts, and the maximum software \r | |
122 | /// interrupt in the EFI_SMM_SW_REGISTER_CONTEXT is denoted by MaximumSwiValue.\r | |
123 | ///\r | |
124 | struct _EFI_SMM_SW_DISPATCH2_PROTOCOL {\r | |
a2bb197e | 125 | EFI_SMM_SW_REGISTER2 Register;\r |
126 | EFI_SMM_SW_UNREGISTER2 UnRegister;\r | |
83632987 | 127 | ///\r |
128 | /// A read-only field that describes the maximum value that can be used in the \r | |
129 | /// EFI_SMM_SW_DISPATCH2_PROTOCOL.Register() service.\r | |
130 | ///\r | |
131 | UINTN MaximumSwiValue;\r | |
132 | };\r | |
133 | \r | |
134 | extern EFI_GUID gEfiSmmSwDispatch2ProtocolGuid;\r | |
135 | \r | |
136 | #endif\r |