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1 | /** @file\r |
2 | \r | |
3 | Copyright (c) 2008-2009, Apple Inc. All rights reserved.\r | |
4 | \r | |
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 | **/\r | |
14 | /** @file\r | |
15 | DXE Cpu Driver.\r | |
16 | \r | |
17 | May need some porting work for platform specifics.\r | |
18 | \r | |
19 | Copyright (c) 2008, Apple Inc \r | |
20 | All rights reserved. This program and the accompanying materials \r | |
21 | are licensed and made available under the terms and conditions of the BSD License \r | |
22 | which accompanies this distribution. The full text of the license may be found at \r | |
23 | http://opensource.org/licenses/bsd-license.php \r | |
24 | \r | |
25 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
26 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
27 | \r | |
28 | **/\r | |
29 | \r | |
30 | #include "CpuDxe.h"\r | |
31 | \r | |
32 | EFI_PERIODIC_CALLBACK gPeriodicCallBack = (EFI_PERIODIC_CALLBACK)NULL;\r | |
33 | \r | |
34 | EFI_DEBUG_SUPPORT_PERIODIC_CALLBACK_PROTOCOL *gDebugSupportCallback = NULL;\r | |
35 | \r | |
36 | \r | |
37 | EFI_STATUS\r | |
38 | EFIAPI\r | |
39 | DebugSupportGetMaximumProcessorIndex (\r | |
40 | IN EFI_DEBUG_SUPPORT_PROTOCOL *This,\r | |
41 | OUT UINTN *MaxProcessorIndex\r | |
42 | )\r | |
43 | /*++\r | |
44 | \r | |
45 | Routine Description: This is a DebugSupport protocol member function.\r | |
46 | \r | |
47 | Arguments:\r | |
48 | This - The DebugSupport instance\r | |
49 | MaxProcessorIndex - The maximuim supported processor index\r | |
50 | \r | |
51 | Returns:\r | |
52 | Always returns EFI_SUCCESS with *MaxProcessorIndex set to 0\r | |
53 | \r | |
54 | --*/\r | |
55 | {\r | |
56 | *MaxProcessorIndex = 0;\r | |
57 | return EFI_SUCCESS;\r | |
58 | }\r | |
59 | \r | |
60 | EFI_STATUS\r | |
61 | EFIAPI\r | |
62 | DebugSupportRegisterPeriodicCallback (\r | |
63 | IN EFI_DEBUG_SUPPORT_PROTOCOL *This,\r | |
64 | IN UINTN ProcessorIndex,\r | |
65 | IN EFI_PERIODIC_CALLBACK PeriodicCallback\r | |
66 | )\r | |
67 | /*++\r | |
68 | \r | |
69 | Routine Description: This is a DebugSupport protocol member function.\r | |
70 | \r | |
71 | Arguments:\r | |
72 | This - The DebugSupport instance\r | |
73 | ProcessorIndex - Which processor the callback applies to.\r | |
74 | PeriodicCallback - Callback function\r | |
75 | \r | |
76 | Returns:\r | |
77 | \r | |
78 | EFI_SUCCESS\r | |
79 | EFI_INVALID_PARAMETER - requested uninstalling a handler from a vector that has\r | |
80 | no handler registered for it\r | |
81 | EFI_ALREADY_STARTED - requested install to a vector that already has a handler registered.\r | |
82 | \r | |
83 | Other possible return values are passed through from UnHookEntry and HookEntry.\r | |
84 | \r | |
85 | --*/\r | |
86 | {\r | |
87 | if (ProcessorIndex != 0) {\r | |
88 | return EFI_INVALID_PARAMETER;\r | |
89 | }\r | |
90 | \r | |
91 | if ((gPeriodicCallBack != (EFI_PERIODIC_CALLBACK)NULL) && (PeriodicCallback != (EFI_PERIODIC_CALLBACK)NULL)) {\r | |
92 | return EFI_ALREADY_STARTED;\r | |
93 | }\r | |
94 | \r | |
95 | gPeriodicCallBack = PeriodicCallback;\r | |
96 | \r | |
97 | if (gDebugSupportCallback != NULL) {\r | |
98 | //\r | |
99 | // We can only update this protocol if the Register Protocol Notify has fired. If it fires \r | |
100 | // after this call it will update with gPeriodicCallBack value.\r | |
101 | //\r | |
102 | gDebugSupportCallback->PeriodicCallback = gPeriodicCallBack;\r | |
103 | }\r | |
104 | \r | |
105 | return EFI_SUCCESS;\r | |
106 | }\r | |
107 | \r | |
108 | \r | |
109 | EFI_STATUS\r | |
110 | EFIAPI\r | |
111 | DebugSupportRegisterExceptionCallback (\r | |
112 | IN EFI_DEBUG_SUPPORT_PROTOCOL *This,\r | |
113 | IN UINTN ProcessorIndex,\r | |
114 | IN EFI_EXCEPTION_CALLBACK NewCallback,\r | |
115 | IN EFI_EXCEPTION_TYPE ExceptionType\r | |
116 | )\r | |
117 | /*++\r | |
118 | \r | |
119 | Routine Description:\r | |
120 | This is a DebugSupport protocol member function.\r | |
121 | \r | |
122 | This code executes in boot services context.\r | |
123 | \r | |
124 | Arguments:\r | |
125 | This - The DebugSupport instance\r | |
126 | ProcessorIndex - Which processor the callback applies to.\r | |
127 | NewCallback - Callback function\r | |
128 | ExceptionType - Which exception to hook\r | |
129 | \r | |
130 | Returns:\r | |
131 | \r | |
132 | EFI_SUCCESS\r | |
133 | EFI_INVALID_PARAMETER - requested uninstalling a handler from a vector that has\r | |
134 | no handler registered for it\r | |
135 | EFI_ALREADY_STARTED - requested install to a vector that already has a handler registered.\r | |
136 | \r | |
137 | Other possible return values are passed through from UnHookEntry and HookEntry.\r | |
138 | \r | |
139 | --*/\r | |
140 | {\r | |
141 | if (ProcessorIndex != 0) {\r | |
142 | return EFI_INVALID_PARAMETER;\r | |
143 | }\r | |
144 | \r | |
145 | return RegisterDebuggerInterruptHandler (ExceptionType, NewCallback);\r | |
146 | }\r | |
147 | \r | |
148 | \r | |
149 | EFI_STATUS\r | |
150 | EFIAPI\r | |
151 | DebugSupportInvalidateInstructionCache (\r | |
152 | IN EFI_DEBUG_SUPPORT_PROTOCOL *This,\r | |
153 | IN UINTN ProcessorIndex,\r | |
154 | IN VOID *Start,\r | |
155 | IN UINT64 Length\r | |
156 | )\r | |
157 | /*++\r | |
158 | \r | |
159 | Routine Description:\r | |
160 | This is a DebugSupport protocol member function.\r | |
161 | Calls assembly routine to flush cache.\r | |
162 | \r | |
163 | Arguments:\r | |
164 | This - The DebugSupport instance\r | |
165 | ProcessorIndex - Which processor the callback applies to.\r | |
166 | Start - Physical base of the memory range to be invalidated\r | |
167 | Length - mininum number of bytes in instruction cache to invalidate\r | |
168 | \r | |
169 | Returns:\r | |
170 | \r | |
171 | EFI_SUCCESS - always return success\r | |
172 | \r | |
173 | --*/\r | |
174 | {\r | |
175 | if (ProcessorIndex != 0) {\r | |
176 | return EFI_INVALID_PARAMETER;\r | |
177 | }\r | |
178 | \r | |
179 | InvalidateInstructionCache();\r | |
180 | \r | |
181 | return EFI_SUCCESS;\r | |
182 | }\r | |
183 | \r | |
184 | //\r | |
185 | // This is a global that is the actual interface\r | |
186 | //\r | |
187 | EFI_DEBUG_SUPPORT_PROTOCOL gDebugSupportProtocolInterface = {\r | |
188 | IsaArm, // Fixme to be more generic\r | |
189 | DebugSupportGetMaximumProcessorIndex,\r | |
190 | DebugSupportRegisterPeriodicCallback,\r | |
191 | DebugSupportRegisterExceptionCallback,\r | |
192 | DebugSupportInvalidateInstructionCache\r | |
193 | };\r | |
194 | \r | |
195 | \r | |
196 | VOID\r | |
197 | EFIAPI\r | |
198 | DebugSupportPeriodicCallbackEventProtocolNotify (\r | |
199 | IN EFI_EVENT Event,\r | |
200 | IN VOID *Context\r | |
201 | )\r | |
202 | {\r | |
203 | EFI_STATUS Status;\r | |
204 | \r | |
205 | Status = gBS->LocateProtocol (&gEfiDebugSupportPeriodicCallbackProtocolGuid, NULL, (VOID **)&gDebugSupportCallback);\r | |
206 | if (!EFI_ERROR (Status)) {\r | |
207 | gDebugSupportCallback->PeriodicCallback = gPeriodicCallBack;\r | |
208 | }\r | |
209 | }\r | |
210 | \r | |
211 | VOID *gRegistration = NULL;\r | |
212 | \r | |
213 | \r | |
214 | EFI_DEBUG_SUPPORT_PROTOCOL *\r | |
215 | InitilaizeDebugSupport (\r | |
216 | VOID\r | |
217 | )\r | |
218 | {\r | |
219 | // RPN gEfiDebugSupportPeriodicCallbackProtocolGuid\r | |
220 | EFI_STATUS Status;\r | |
221 | EFI_EVENT Event;\r | |
222 | \r | |
223 | if (!FeaturePcdGet (PcdCpuDxeProduceDebugSupport)) {\r | |
224 | // Don't include this code unless Feature Flag is set\r | |
225 | return NULL;\r | |
226 | }\r | |
227 | \r | |
228 | \r | |
229 | Status = gBS->CreateEvent (\r | |
230 | EVT_NOTIFY_SIGNAL, \r | |
231 | TPL_CALLBACK, \r | |
232 | DebugSupportPeriodicCallbackEventProtocolNotify, \r | |
233 | NULL, \r | |
234 | &Event\r | |
235 | );\r | |
236 | ASSERT_EFI_ERROR (Status);\r | |
237 | \r | |
238 | Status = gBS->RegisterProtocolNotify (&gEfiDebugSupportPeriodicCallbackProtocolGuid, Event, &gRegistration);\r | |
239 | ASSERT_EFI_ERROR (Status);\r | |
240 | \r | |
241 | //\r | |
242 | // We assume the Timer must depend on our driver to register interrupts so we don't need to do\r | |
243 | // a gBS->SignalEvent (Event) here to check to see if the protocol allready exists\r | |
244 | //\r | |
245 | \r | |
246 | return &gDebugSupportProtocolInterface;\r | |
247 | }\r |