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1 | /** @file\r |
2 | CPU exception handler library implementation for PEIM module.\r | |
3 | \r | |
4 | Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>\r | |
5 | This program and the accompanying materials are licensed and made available under\r | |
6 | the terms and conditions of the BSD License that accompanies this distribution.\r | |
7 | 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 | **/\r | |
14 | \r | |
15 | #include <PiPei.h>\r | |
16 | #include "CpuExceptionCommon.h"\r | |
17 | #include <Library/DebugLib.h>\r | |
18 | #include <Library/HobLib.h>\r | |
19 | #include <Library/MemoryAllocationLib.h>\r | |
20 | \r | |
21 | //\r | |
22 | // Image Alignment size for PEI phase\r | |
23 | //\r | |
24 | CONST UINTN mImageAlignSize = 4;\r | |
25 | CONST UINTN mDoFarReturnFlag = 0;\r | |
26 | \r | |
27 | EFI_GUID mCpuExceptrionHandlerLibHobGuid = CPU_EXCEPTION_HANDLER_LIB_HOB_GUID;\r | |
28 | \r | |
29 | /**\r | |
30 | Get exception handler data pointer from GUIDed HOb.\r | |
31 | \r | |
32 | @return pointer to exception handler data. \r | |
33 | **/\r | |
34 | EXCEPTION_HANDLER_DATA *\r | |
35 | GetExceptionHandlerData (\r | |
36 | VOID\r | |
37 | )\r | |
38 | {\r | |
39 | EFI_HOB_GUID_TYPE *GuidHob;\r | |
40 | VOID *DataInHob;\r | |
41 | EXCEPTION_HANDLER_DATA *ExceptionHandlerData;\r | |
42 | \r | |
43 | ExceptionHandlerData = NULL;\r | |
44 | GuidHob = GetFirstGuidHob (&mCpuExceptrionHandlerLibHobGuid);\r | |
45 | if (GuidHob != NULL) {\r | |
46 | DataInHob = GET_GUID_HOB_DATA (GuidHob);\r | |
47 | ExceptionHandlerData = (EXCEPTION_HANDLER_DATA *)(*(UINTN *)DataInHob);\r | |
48 | }\r | |
49 | ASSERT (ExceptionHandlerData != NULL);\r | |
50 | return ExceptionHandlerData;\r | |
51 | }\r | |
52 | \r | |
53 | /**\r | |
54 | Common exception handler.\r | |
55 | \r | |
56 | @param ExceptionType Exception type.\r | |
57 | @param SystemContext Pointer to EFI_SYSTEM_CONTEXT.\r | |
58 | **/\r | |
59 | VOID\r | |
60 | EFIAPI\r | |
61 | CommonExceptionHandler (\r | |
62 | IN EFI_EXCEPTION_TYPE ExceptionType, \r | |
63 | IN EFI_SYSTEM_CONTEXT SystemContext\r | |
64 | )\r | |
65 | {\r | |
66 | EXCEPTION_HANDLER_DATA *ExceptionHandlerData;\r | |
67 | \r | |
68 | ExceptionHandlerData = GetExceptionHandlerData ();\r | |
69 | CommonExceptionHandlerWorker (ExceptionType, SystemContext, ExceptionHandlerData);\r | |
70 | }\r | |
71 | \r | |
72 | /**\r | |
73 | Initializes all CPU exceptions entries and provides the default exception handlers.\r | |
74 | \r | |
75 | Caller should try to get an array of interrupt and/or exception vectors that are in use and need to\r | |
76 | persist by EFI_VECTOR_HANDOFF_INFO defined in PI 1.3 specification.\r | |
77 | If caller cannot get reserved vector list or it does not exists, set VectorInfo to NULL. \r | |
78 | If VectorInfo is not NULL, the exception vectors will be initialized per vector attribute accordingly.\r | |
79 | Note: Before invoking this API, caller must allocate memory for IDT table and load \r | |
80 | IDTR by AsmWriteIdtr().\r | |
81 | \r | |
82 | @param[in] VectorInfo Pointer to reserved vector list.\r | |
83 | \r | |
84 | @retval EFI_SUCCESS CPU Exception Entries have been successfully initialized \r | |
85 | with default exception handlers.\r | |
86 | @retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if VectorInfo is not NULL.\r | |
87 | @retval EFI_UNSUPPORTED This function is not supported.\r | |
88 | \r | |
89 | **/\r | |
90 | EFI_STATUS\r | |
91 | EFIAPI\r | |
92 | InitializeCpuExceptionHandlers (\r | |
93 | IN EFI_VECTOR_HANDOFF_INFO *VectorInfo OPTIONAL\r | |
94 | )\r | |
95 | {\r | |
96 | EFI_STATUS Status;\r | |
97 | EXCEPTION_HANDLER_DATA *ExceptionHandlerData;\r | |
98 | RESERVED_VECTORS_DATA *ReservedVectors;\r | |
99 | \r | |
100 | ReservedVectors = AllocatePool (sizeof (RESERVED_VECTORS_DATA) * CPU_EXCEPTION_NUM);\r | |
101 | ASSERT (ReservedVectors != NULL);\r | |
102 | \r | |
103 | ExceptionHandlerData = AllocatePool (sizeof (EXCEPTION_HANDLER_DATA));\r | |
104 | ASSERT (ExceptionHandlerData != NULL);\r | |
105 | ExceptionHandlerData->ReservedVectors = ReservedVectors;\r | |
106 | ExceptionHandlerData->ExternalInterruptHandler = NULL;\r | |
107 | InitializeSpinLock (&ExceptionHandlerData->DisplayMessageSpinLock);\r | |
108 | \r | |
109 | Status = InitializeCpuExceptionHandlersWorker (VectorInfo, ExceptionHandlerData);\r | |
110 | if (EFI_ERROR (Status)) {\r | |
111 | FreePool (ReservedVectors);\r | |
112 | FreePool (ExceptionHandlerData);\r | |
113 | return Status;\r | |
114 | }\r | |
115 | \r | |
116 | //\r | |
117 | // Build location of CPU MP DATA buffer in HOB\r | |
118 | //\r | |
119 | BuildGuidDataHob (\r | |
120 | &mCpuExceptrionHandlerLibHobGuid,\r | |
121 | (VOID *)&ExceptionHandlerData,\r | |
122 | sizeof(UINT64)\r | |
123 | );\r | |
124 | \r | |
125 | return EFI_SUCCESS;\r | |
126 | }\r | |
127 | \r | |
128 | /**\r | |
129 | Initializes all CPU interrupt/exceptions entries and provides the default interrupt/exception handlers.\r | |
130 | \r | |
131 | Caller should try to get an array of interrupt and/or exception vectors that are in use and need to\r | |
132 | persist by EFI_VECTOR_HANDOFF_INFO defined in PI 1.3 specification.\r | |
133 | If caller cannot get reserved vector list or it does not exists, set VectorInfo to NULL. \r | |
134 | If VectorInfo is not NULL, the exception vectors will be initialized per vector attribute accordingly.\r | |
135 | \r | |
136 | @param[in] VectorInfo Pointer to reserved vector list.\r | |
137 | \r | |
138 | @retval EFI_SUCCESS All CPU interrupt/exception entries have been successfully initialized \r | |
139 | with default interrupt/exception handlers.\r | |
140 | @retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if VectorInfo is not NULL.\r | |
141 | @retval EFI_UNSUPPORTED This function is not supported.\r | |
142 | \r | |
143 | **/\r | |
144 | EFI_STATUS\r | |
145 | EFIAPI\r | |
146 | InitializeCpuInterruptHandlers (\r | |
147 | IN EFI_VECTOR_HANDOFF_INFO *VectorInfo OPTIONAL\r | |
148 | )\r | |
149 | {\r | |
150 | return EFI_UNSUPPORTED;\r | |
151 | }\r | |
152 | \r | |
153 | /**\r | |
154 | Registers a function to be called from the processor interrupt handler.\r | |
155 | \r | |
156 | This function registers and enables the handler specified by InterruptHandler for a processor \r | |
157 | interrupt or exception type specified by InterruptType. If InterruptHandler is NULL, then the \r | |
158 | handler for the processor interrupt or exception type specified by InterruptType is uninstalled. \r | |
159 | The installed handler is called once for each processor interrupt or exception.\r | |
160 | NOTE: This function should be invoked after InitializeCpuExceptionHandlers() or\r | |
161 | InitializeCpuInterruptHandlers() invoked, otherwise EFI_UNSUPPORTED returned.\r | |
162 | \r | |
163 | @param[in] InterruptType Defines which interrupt or exception to hook.\r | |
164 | @param[in] InterruptHandler A pointer to a function of type EFI_CPU_INTERRUPT_HANDLER that is called\r | |
165 | when a processor interrupt occurs. If this parameter is NULL, then the handler\r | |
166 | will be uninstalled.\r | |
167 | \r | |
168 | @retval EFI_SUCCESS The handler for the processor interrupt was successfully installed or uninstalled.\r | |
169 | @retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler for InterruptType was\r | |
170 | previously installed.\r | |
171 | @retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for InterruptType was not\r | |
172 | previously installed.\r | |
173 | @retval EFI_UNSUPPORTED The interrupt specified by InterruptType is not supported,\r | |
174 | or this function is not supported.\r | |
175 | **/\r | |
176 | EFI_STATUS\r | |
177 | EFIAPI\r | |
178 | RegisterCpuInterruptHandler (\r | |
179 | IN EFI_EXCEPTION_TYPE InterruptType,\r | |
180 | IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler\r | |
181 | )\r | |
182 | {\r | |
183 | return EFI_UNSUPPORTED;\r | |
184 | } |