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6e8a984e | 1 | /** @file\r |
2 | Generic debug support macros, typedefs and prototypes for IA32/x64.\r | |
3 | \r | |
4 | Copyright (c) 2006 - 2008, Intel Corporation \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 | \r | |
15 | #ifndef _DEBUG_SUPPORT_H_\r | |
16 | #define _DEBUG_SUPPORT_H_\r | |
17 | \r | |
6e8a984e | 18 | #include <Uefi.h>\r |
19 | \r | |
20 | #include <Protocol/DebugSupport.h>\r | |
21 | #include <Protocol/LoadedImage.h>\r | |
22 | \r | |
23 | #include <Library/DebugLib.h>\r | |
24 | #include <Library/UefiDriverEntryPoint.h>\r | |
25 | #include <Library/BaseMemoryLib.h>\r | |
26 | #include <Library/MemoryAllocationLib.h>\r | |
27 | #include <Library/UefiBootServicesTableLib.h>\r | |
28 | #include <Library/BaseLib.h>\r | |
29 | #include <Library/PcdLib.h>\r | |
30 | \r | |
31 | #define NUM_IDT_ENTRIES 0x78\r | |
32 | #define SYSTEM_TIMER_VECTOR 0x68\r | |
6e8a984e | 33 | \r |
34 | typedef\r | |
35 | VOID\r | |
36 | (*DEBUG_PROC) (\r | |
37 | VOID\r | |
38 | );\r | |
39 | \r | |
40 | typedef struct {\r | |
41 | IA32_IDT_GATE_DESCRIPTOR OrigDesc;\r | |
42 | DEBUG_PROC OrigVector;\r | |
43 | IA32_IDT_GATE_DESCRIPTOR NewDesc;\r | |
44 | DEBUG_PROC StubEntry;\r | |
45 | VOID (*RegisteredCallback) ();\r | |
46 | } IDT_ENTRY;\r | |
47 | \r | |
c84507ab | 48 | extern UINT8 InterruptEntryStub[];\r |
49 | extern UINT32 StubSize;\r | |
50 | extern VOID (*OrigVector) (VOID);\r | |
51 | extern IDT_ENTRY *IdtEntryTable;\r | |
6e8a984e | 52 | extern IA32_IDT_GATE_DESCRIPTOR NullDesc;\r |
53 | \r | |
54 | /**\r | |
55 | Generic IDT entry.\r | |
56 | \r | |
57 | **/\r | |
58 | VOID\r | |
59 | CommonIdtEntry (\r | |
60 | VOID\r | |
61 | );\r | |
62 | \r | |
63 | /**\r | |
64 | Check whether FXSTOR is supported\r | |
65 | \r | |
66 | @retval TRUE FXSTOR is supported.\r | |
67 | @retval FALSE FXSTOR is not supported.\r | |
68 | \r | |
69 | **/\r | |
70 | BOOLEAN\r | |
71 | FxStorSupport (\r | |
72 | VOID\r | |
73 | );\r | |
74 | \r | |
75 | /**\r | |
76 | Encodes an IDT descriptor with the given physical address.\r | |
77 | \r | |
78 | @param DestDesc The IDT descriptor address.\r | |
79 | @param Vecotr The interrupt vector entry.\r | |
80 | \r | |
81 | **/\r | |
82 | VOID\r | |
83 | Vect2Desc (\r | |
84 | IA32_IDT_GATE_DESCRIPTOR * DestDesc,\r | |
85 | VOID (*Vector) (VOID)\r | |
86 | );\r | |
87 | \r | |
6e8a984e | 88 | /**\r |
7601dbe7 | 89 | Initializes driver's handler registration database. \r |
6e8a984e | 90 | \r |
91 | This code executes in boot services context\r | |
92 | Must be public because it's referenced from DebugSupport.c\r | |
93 | \r | |
94 | @retval EFI_UNSUPPORTED If IA32 processor does not support FXSTOR/FXRSTOR instructions,\r | |
95 | the context save will fail, so these processor's are not supported.\r | |
96 | @retval EFI_OUT_OF_RESOURCES Fails to allocate memory.\r | |
97 | @retval EFI_SUCCESS Initializes successfully.\r | |
98 | \r | |
99 | **/\r | |
100 | EFI_STATUS\r | |
101 | PlInitializeDebugSupportDriver (\r | |
102 | VOID\r | |
103 | );\r | |
104 | \r | |
105 | /**\r | |
106 | This is the callback that is written to the LoadedImage protocol instance\r | |
107 | on the image handle. It uninstalls all registered handlers and frees all entry\r | |
108 | stub memory.\r | |
109 | \r | |
110 | @param ImageHandle The firmware allocated handle for the EFI image.\r | |
111 | \r | |
112 | @retval EFI_SUCCESS Always.\r | |
113 | \r | |
114 | **/\r | |
115 | EFI_STATUS\r | |
116 | EFIAPI\r | |
117 | PlUnloadDebugSupportDriver (\r | |
118 | IN EFI_HANDLE ImageHandle\r | |
119 | );\r | |
120 | \r | |
121 | /**\r | |
c84507ab | 122 | Returns the maximum value that may be used for the ProcessorIndex parameter in\r |
123 | RegisterPeriodicCallback() and RegisterExceptionCallback(). \r | |
124 | \r | |
125 | Hard coded to support only 1 processor for now.\r | |
6e8a984e | 126 | \r |
c84507ab | 127 | @param This A pointer to the EFI_DEBUG_SUPPORT_PROTOCOL instance.\r |
128 | @param MaxProcessorIndex Pointer to a caller-allocated UINTN in which the maximum supported\r | |
129 | processor index is returned. Always 0 returned. \r | |
130 | \r | |
131 | @retval EFI_SUCCESS Always returned with **MaxProcessorIndex set to 0.\r | |
6e8a984e | 132 | \r |
133 | **/\r | |
134 | EFI_STATUS\r | |
135 | EFIAPI\r | |
136 | GetMaximumProcessorIndex (\r | |
137 | IN EFI_DEBUG_SUPPORT_PROTOCOL *This,\r | |
138 | OUT UINTN *MaxProcessorIndex\r | |
139 | );\r | |
140 | \r | |
141 | /**\r | |
c84507ab | 142 | Registers a function to be called back periodically in interrupt context.\r |
143 | \r | |
144 | @param This A pointer to the EFI_DEBUG_SUPPORT_PROTOCOL instance.\r | |
145 | @param ProcessorIndex Specifies which processor the callback function applies to.\r | |
146 | @param PeriodicCallback A pointer to a function of type PERIODIC_CALLBACK that is the main\r | |
147 | periodic entry point of the debug agent.\r | |
148 | \r | |
149 | @retval EFI_SUCCESS The function completed successfully. \r | |
150 | @retval EFI_ALREADY_STARTED Non-NULL PeriodicCallback parameter when a callback\r | |
151 | function was previously registered. \r | |
152 | @retval EFI_OUT_OF_RESOURCES System has insufficient memory resources to register new callback \r | |
153 | function. \r | |
6e8a984e | 154 | **/\r |
155 | EFI_STATUS\r | |
156 | EFIAPI\r | |
157 | RegisterPeriodicCallback (\r | |
158 | IN EFI_DEBUG_SUPPORT_PROTOCOL *This,\r | |
159 | IN UINTN ProcessorIndex,\r | |
160 | IN EFI_PERIODIC_CALLBACK PeriodicCallback\r | |
161 | );\r | |
162 | \r | |
163 | /**\r | |
c84507ab | 164 | Registers a function to be called when a given processor exception occurs.\r |
6e8a984e | 165 | \r |
166 | This code executes in boot services context.\r | |
c84507ab | 167 | \r |
168 | @param This A pointer to the EFI_DEBUG_SUPPORT_PROTOCOL instance.\r | |
169 | @param ProcessorIndex Specifies which processor the callback function applies to.\r | |
170 | @param ExceptionCallback A pointer to a function of type EXCEPTION_CALLBACK that is called\r | |
171 | when the processor exception specified by ExceptionType occurs. \r | |
172 | @param ExceptionType Specifies which processor exception to hook. \r | |
173 | \r | |
174 | @retval EFI_SUCCESS The function completed successfully. \r | |
175 | @retval EFI_ALREADY_STARTED Non-NULL PeriodicCallback parameter when a callback\r | |
176 | function was previously registered. \r | |
177 | @retval EFI_OUT_OF_RESOURCES System has insufficient memory resources to register new callback \r | |
178 | function.\r | |
6e8a984e | 179 | **/\r |
180 | EFI_STATUS\r | |
181 | EFIAPI\r | |
182 | RegisterExceptionCallback (\r | |
183 | IN EFI_DEBUG_SUPPORT_PROTOCOL *This,\r | |
184 | IN UINTN ProcessorIndex,\r | |
c84507ab | 185 | IN EFI_EXCEPTION_CALLBACK ExceptionCallback,\r |
6e8a984e | 186 | IN EFI_EXCEPTION_TYPE ExceptionType\r |
187 | );\r | |
188 | \r | |
189 | /**\r | |
c84507ab | 190 | Invalidates processor instruction cache for a memory range. Subsequent execution in this range\r |
191 | causes a fresh memory fetch to retrieve code to be executed. \r | |
192 | \r | |
193 | @param This A pointer to the EFI_DEBUG_SUPPORT_PROTOCOL instance.\r | |
194 | @param ProcessorIndex Specifies which processor's instruction cache is to be invalidated.\r | |
195 | @param Start Specifies the physical base of the memory range to be invalidated. \r | |
196 | @param Length Specifies the minimum number of bytes in the processor's instruction\r | |
197 | cache to invalidate. \r | |
198 | \r | |
199 | @retval EFI_SUCCESS Always returned.\r | |
6e8a984e | 200 | \r |
201 | **/\r | |
202 | EFI_STATUS\r | |
203 | EFIAPI\r | |
204 | InvalidateInstructionCache (\r | |
205 | IN EFI_DEBUG_SUPPORT_PROTOCOL *This,\r | |
206 | IN UINTN ProcessorIndex,\r | |
207 | IN VOID *Start,\r | |
208 | IN UINT64 Length\r | |
209 | );\r | |
210 | \r | |
211 | /**\r | |
212 | Allocate pool for a new IDT entry stub.\r | |
213 | \r | |
214 | Copy the generic stub into the new buffer and fixup the vector number\r | |
215 | and jump target address.\r | |
216 | \r | |
217 | @param ExceptionType This is the exception type that the new stub will be created\r | |
218 | for.\r | |
219 | @param Stub On successful exit, *Stub contains the newly allocated entry stub.\r | |
220 | \r | |
6e8a984e | 221 | **/\r |
c84507ab | 222 | VOID\r |
6e8a984e | 223 | CreateEntryStub (\r |
224 | IN EFI_EXCEPTION_TYPE ExceptionType,\r | |
225 | OUT VOID **Stub\r | |
226 | );\r | |
227 | \r | |
228 | /**\r | |
c84507ab | 229 | Get Interrupt Handle from IDT Gate Descriptor.\r |
6e8a984e | 230 | \r |
231 | @param IdtGateDecriptor IDT Gate Descriptor.\r | |
232 | \r | |
c84507ab | 233 | @return Interrupt Handle stored in IDT Gate Descriptor.\r |
6e8a984e | 234 | \r |
235 | **/\r | |
c84507ab | 236 | UINTN\r |
237 | GetInterruptHandleFromIdt (\r | |
6e8a984e | 238 | IN IA32_IDT_GATE_DESCRIPTOR *IdtGateDecriptor\r |
239 | );\r | |
240 | \r | |
241 | /**\r | |
242 | This is the main worker function that manages the state of the interrupt\r | |
243 | handlers. It both installs and uninstalls interrupt handlers based on the\r | |
244 | value of NewCallback. If NewCallback is NULL, then uninstall is indicated.\r | |
245 | If NewCallback is non-NULL, then install is indicated.\r | |
246 | \r | |
247 | @param NewCallback If non-NULL, NewCallback specifies the new handler to register.\r | |
248 | If NULL, specifies that the previously registered handler should\r | |
249 | be uninstalled.\r | |
250 | @param ExceptionType Indicates which entry to manage.\r | |
251 | \r | |
252 | @retval EFI_SUCCESS Process is ok.\r | |
253 | @retval EFI_INVALID_PARAMETER Requested uninstalling a handler from a vector that has\r | |
254 | no handler registered for it\r | |
255 | @retval EFI_ALREADY_STARTED Requested install to a vector that already has a handler registered.\r | |
256 | @retval others Possible return values are passed through from UnHookEntry and HookEntry.\r | |
257 | \r | |
258 | **/\r | |
259 | EFI_STATUS\r | |
260 | ManageIdtEntryTable (\r | |
c84507ab | 261 | VOID (*NewCallback)(),\r |
6e8a984e | 262 | EFI_EXCEPTION_TYPE ExceptionType\r |
263 | );\r | |
264 | \r | |
265 | /**\r | |
266 | Creates a nes entry stub. Then saves the current IDT entry and replaces it\r | |
267 | with an interrupt gate for the new entry point. The IdtEntryTable is updated\r | |
268 | with the new registered function.\r | |
269 | \r | |
270 | This code executes in boot services context. The stub entry executes in interrupt\r | |
271 | context.\r | |
272 | \r | |
273 | @param ExceptionType Specifies which vector to hook.\r | |
274 | @param NewCallback A pointer to the new function to be registered.\r | |
275 | \r | |
6e8a984e | 276 | **/\r |
c84507ab | 277 | VOID\r |
6e8a984e | 278 | HookEntry (\r |
279 | IN EFI_EXCEPTION_TYPE ExceptionType,\r | |
280 | IN VOID (*NewCallback) ()\r | |
281 | );\r | |
282 | \r | |
283 | /**\r | |
284 | Undoes HookEntry. This code executes in boot services context.\r | |
285 | \r | |
286 | @param ExceptionType Specifies which entry to unhook\r | |
287 | \r | |
6e8a984e | 288 | **/\r |
c84507ab | 289 | VOID\r |
6e8a984e | 290 | UnhookEntry (\r |
291 | IN EFI_EXCEPTION_TYPE ExceptionType\r | |
292 | );\r | |
293 | \r | |
294 | #endif\r |