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162ed594 | 1 | /** @file\r |
797a9d67 | 2 | DXE Dispatcher.\r |
28a00297 | 3 | \r |
4 | Step #1 - When a FV protocol is added to the system every driver in the FV\r | |
5 | is added to the mDiscoveredList. The SOR, Before, and After Depex are \r | |
6 | pre-processed as drivers are added to the mDiscoveredList. If an Apriori \r | |
7 | file exists in the FV those drivers are addeded to the \r | |
8 | mScheduledQueue. The mFvHandleList is used to make sure a \r | |
9 | FV is only processed once.\r | |
10 | \r | |
11 | Step #2 - Dispatch. Remove driver from the mScheduledQueue and load and\r | |
12 | start it. After mScheduledQueue is drained check the \r | |
13 | mDiscoveredList to see if any item has a Depex that is ready to \r | |
14 | be placed on the mScheduledQueue.\r | |
15 | \r | |
16 | Step #3 - Adding to the mScheduledQueue requires that you process Before \r | |
17 | and After dependencies. This is done recursively as the call to add\r | |
18 | to the mScheduledQueue checks for Before and recursively adds \r | |
19 | all Befores. It then addes the item that was passed in and then \r | |
20 | processess the After dependecies by recursively calling the routine.\r | |
21 | \r | |
22 | Dispatcher Rules:\r | |
23 | The rules for the dispatcher are in chapter 10 of the DXE CIS. Figure 10-3 \r | |
24 | is the state diagram for the DXE dispatcher\r | |
25 | \r | |
26 | Depex - Dependency Expresion.\r | |
27 | SOR - Schedule On Request - Don't schedule if this bit is set.\r | |
28 | \r | |
162ed594 | 29 | Copyright (c) 2006 - 2008, Intel Corporation \r |
797a9d67 | 30 | All rights reserved. This program and the accompanying materials \r |
31 | are licensed and made available under the terms and conditions of the BSD License \r | |
32 | which accompanies this distribution. The full text of the license may be found at \r | |
33 | http://opensource.org/licenses/bsd-license.php \r | |
34 | \r | |
35 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
36 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
37 | \r | |
38 | **/\r | |
28a00297 | 39 | \r |
40 | #include <DxeMain.h>\r | |
41 | \r | |
42 | //\r | |
43 | // The Driver List contains one copy of every driver that has been discovered.\r | |
44 | // Items are never removed from the driver list. List of EFI_CORE_DRIVER_ENTRY\r | |
45 | //\r | |
46 | LIST_ENTRY mDiscoveredList = INITIALIZE_LIST_HEAD_VARIABLE (mDiscoveredList); \r | |
47 | \r | |
48 | //\r | |
49 | // Queue of drivers that are ready to dispatch. This queue is a subset of the\r | |
50 | // mDiscoveredList.list of EFI_CORE_DRIVER_ENTRY.\r | |
51 | //\r | |
52 | LIST_ENTRY mScheduledQueue = INITIALIZE_LIST_HEAD_VARIABLE (mScheduledQueue);\r | |
53 | \r | |
54 | //\r | |
55 | // List of handles who's Fv's have been parsed and added to the mFwDriverList.\r | |
56 | //\r | |
57 | LIST_ENTRY mFvHandleList = INITIALIZE_LIST_HEAD_VARIABLE (mFvHandleList); // list of KNOWN_HANDLE\r | |
58 | \r | |
59 | //\r | |
60 | // Lock for mDiscoveredList, mScheduledQueue, gDispatcherRunning.\r | |
61 | //\r | |
62 | EFI_LOCK mDispatcherLock = EFI_INITIALIZE_LOCK_VARIABLE (TPL_HIGH_LEVEL);\r | |
63 | \r | |
64 | \r | |
65 | //\r | |
66 | // Flag for the DXE Dispacher. TRUE if dispatcher is execuing.\r | |
67 | //\r | |
68 | BOOLEAN gDispatcherRunning = FALSE;\r | |
69 | \r | |
70 | //\r | |
71 | // Module globals to manage the FwVol registration notification event\r | |
72 | //\r | |
73 | EFI_EVENT mFwVolEvent;\r | |
74 | VOID *mFwVolEventRegistration;\r | |
75 | \r | |
76 | //\r | |
77 | // List of file types supported by dispatcher\r | |
78 | //\r | |
db405d1b | 79 | STATIC EFI_FV_FILETYPE mDxeFileTypes[] = { \r |
28a00297 | 80 | EFI_FV_FILETYPE_DRIVER, \r |
81 | EFI_FV_FILETYPE_COMBINED_PEIM_DRIVER, \r | |
82 | EFI_FV_FILETYPE_DXE_CORE,\r | |
83 | EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE\r | |
84 | };\r | |
85 | \r | |
86 | typedef struct {\r | |
87 | MEDIA_FW_VOL_FILEPATH_DEVICE_PATH File;\r | |
88 | EFI_DEVICE_PATH_PROTOCOL End;\r | |
89 | } FV_FILEPATH_DEVICE_PATH;\r | |
90 | \r | |
91 | FV_FILEPATH_DEVICE_PATH mFvDevicePath;\r | |
92 | \r | |
93 | \r | |
94 | //\r | |
95 | // Function Prototypes\r | |
96 | //\r | |
162ed594 | 97 | /**\r |
98 | Insert InsertedDriverEntry onto the mScheduledQueue. To do this you\r | |
99 | must add any driver with a before dependency on InsertedDriverEntry first.\r | |
100 | You do this by recursively calling this routine. After all the Befores are\r | |
101 | processed you can add InsertedDriverEntry to the mScheduledQueue.\r | |
102 | Then you can add any driver with an After dependency on InsertedDriverEntry\r | |
103 | by recursively calling this routine.\r | |
104 | \r | |
105 | @param InsertedDriverEntry The driver to insert on the ScheduledLink Queue\r | |
106 | \r | |
107 | **/\r | |
28a00297 | 108 | STATIC\r |
109 | VOID\r | |
110 | CoreInsertOnScheduledQueueWhileProcessingBeforeAndAfter (\r | |
111 | IN EFI_CORE_DRIVER_ENTRY *InsertedDriverEntry\r | |
112 | );\r | |
113 | \r | |
162ed594 | 114 | /**\r |
115 | Event notification that is fired every time a FV dispatch protocol is added.\r | |
116 | More than one protocol may have been added when this event is fired, so you\r | |
117 | must loop on CoreLocateHandle () to see how many protocols were added and\r | |
118 | do the following to each FV:\r | |
119 | If the Fv has already been processed, skip it. If the Fv has not been\r | |
120 | processed then mark it as being processed, as we are about to process it.\r | |
121 | Read the Fv and add any driver in the Fv to the mDiscoveredList.The\r | |
122 | mDiscoveredList is never free'ed and contains variables that define\r | |
123 | the other states the DXE driver transitions to..\r | |
124 | While you are at it read the A Priori file into memory.\r | |
125 | Place drivers in the A Priori list onto the mScheduledQueue.\r | |
126 | \r | |
127 | @param Event The Event that is being processed, not used. \r | |
128 | @param Context Event Context, not used.\r | |
129 | \r | |
130 | **/\r | |
28a00297 | 131 | STATIC\r |
132 | VOID\r | |
133 | EFIAPI\r | |
134 | CoreFwVolEventProtocolNotify (\r | |
135 | IN EFI_EVENT Event,\r | |
136 | IN VOID *Context\r | |
137 | );\r | |
138 | \r | |
162ed594 | 139 | /**\r |
140 | Convert FvHandle and DriverName into an EFI device path\r | |
141 | \r | |
142 | @param Fv Fv protocol, needed to read Depex info out of \r | |
143 | FLASH. \r | |
144 | @param FvHandle Handle for Fv, needed in the \r | |
145 | EFI_CORE_DRIVER_ENTRY so that the PE image can be \r | |
146 | read out of the FV at a later time. \r | |
147 | @param DriverName Name of driver to add to mDiscoveredList. \r | |
148 | \r | |
149 | @return Pointer to device path constructed from FvHandle and DriverName\r | |
150 | \r | |
151 | **/\r | |
28a00297 | 152 | STATIC\r |
153 | EFI_DEVICE_PATH_PROTOCOL *\r | |
154 | CoreFvToDevicePath (\r | |
0c2b5da8 | 155 | IN EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv,\r |
28a00297 | 156 | IN EFI_HANDLE FvHandle,\r |
157 | IN EFI_GUID *DriverName\r | |
158 | );\r | |
159 | \r | |
162ed594 | 160 | /**\r |
161 | Add an entry to the mDiscoveredList. Allocate memory to store the DriverEntry,\r | |
162 | and initilize any state variables. Read the Depex from the FV and store it\r | |
163 | in DriverEntry. Pre-process the Depex to set the SOR, Before and After state.\r | |
164 | The Discovered list is never free'ed and contains booleans that represent the\r | |
165 | other possible DXE driver states.\r | |
166 | \r | |
167 | @param Fv Fv protocol, needed to read Depex info out of \r | |
168 | FLASH. \r | |
169 | @param FvHandle Handle for Fv, needed in the \r | |
170 | EFI_CORE_DRIVER_ENTRY so that the PE image can be \r | |
171 | read out of the FV at a later time. \r | |
172 | @param DriverName Name of driver to add to mDiscoveredList. \r | |
173 | \r | |
174 | @retval EFI_SUCCESS If driver was added to the mDiscoveredList. \r | |
175 | @retval EFI_ALREADY_STARTED The driver has already been started. Only one \r | |
176 | DriverName may be active in the system at any one \r | |
177 | time.\r | |
178 | \r | |
179 | **/\r | |
28a00297 | 180 | STATIC \r |
181 | EFI_STATUS\r | |
182 | CoreAddToDriverList (\r | |
0c2b5da8 | 183 | IN EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv,\r |
28a00297 | 184 | IN EFI_HANDLE FvHandle,\r |
185 | IN EFI_GUID *DriverName\r | |
186 | );\r | |
187 | \r | |
162ed594 | 188 | /**\r |
189 | Get the driver from the FV through driver name, and produce a FVB protocol on FvHandle.\r | |
190 | \r | |
191 | @param Fv The FIRMWARE_VOLUME protocol installed on the FV. \r | |
192 | @param FvHandle The handle which FVB protocol installed on. \r | |
193 | @param DriverName The driver guid specified. \r | |
194 | \r | |
195 | @retval EFI_OUT_OF_RESOURCES No enough memory or other resource. \r | |
196 | @retval EFI_VOLUME_CORRUPTED Corrupted volume. \r | |
197 | @retval EFI_SUCCESS Function successfully returned.\r | |
198 | \r | |
199 | **/\r | |
28a00297 | 200 | STATIC\r |
201 | EFI_STATUS \r | |
202 | CoreProcessFvImageFile (\r | |
0c2b5da8 | 203 | IN EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv,\r |
28a00297 | 204 | IN EFI_HANDLE FvHandle,\r |
205 | IN EFI_GUID *DriverName\r | |
206 | );\r | |
207 | \r | |
162ed594 | 208 | \r |
209 | /**\r | |
210 | Enter critical section by gaining lock on mDispatcherLock.\r | |
211 | \r | |
212 | **/\r | |
28a00297 | 213 | STATIC\r |
214 | VOID\r | |
215 | CoreAcquireDispatcherLock (\r | |
216 | VOID\r | |
217 | )\r | |
28a00297 | 218 | {\r |
219 | CoreAcquireLock (&mDispatcherLock);\r | |
220 | }\r | |
221 | \r | |
162ed594 | 222 | \r |
223 | /**\r | |
224 | Exit critical section by releasing lock on mDispatcherLock.\r | |
225 | \r | |
226 | **/\r | |
28a00297 | 227 | STATIC\r |
228 | VOID\r | |
229 | CoreReleaseDispatcherLock (\r | |
230 | VOID\r | |
231 | )\r | |
28a00297 | 232 | {\r |
233 | CoreReleaseLock (&mDispatcherLock);\r | |
234 | }\r | |
235 | \r | |
28a00297 | 236 | \r |
162ed594 | 237 | /**\r |
28a00297 | 238 | Read Depex and pre-process the Depex for Before and After. If Section Extraction\r |
239 | protocol returns an error via ReadSection defer the reading of the Depex.\r | |
240 | \r | |
162ed594 | 241 | @param DriverEntry Driver to work on. \r |
28a00297 | 242 | \r |
162ed594 | 243 | @retval EFI_SUCCESS Depex read and preprossesed \r |
244 | @retval EFI_PROTOCOL_ERROR The section extraction protocol returned an error \r | |
245 | and Depex reading needs to be retried. \r | |
246 | @retval Error DEPEX not found.\r | |
28a00297 | 247 | \r |
162ed594 | 248 | **/\r |
249 | STATIC\r | |
250 | EFI_STATUS\r | |
251 | CoreGetDepexSectionAndPreProccess (\r | |
252 | IN EFI_CORE_DRIVER_ENTRY *DriverEntry\r | |
253 | )\r | |
28a00297 | 254 | {\r |
255 | EFI_STATUS Status;\r | |
256 | EFI_SECTION_TYPE SectionType;\r | |
257 | UINT32 AuthenticationStatus;\r | |
0c2b5da8 | 258 | EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv;\r |
28a00297 | 259 | \r |
260 | \r | |
261 | Fv = DriverEntry->Fv;\r | |
262 | \r | |
263 | //\r | |
264 | // Grab Depex info, it will never be free'ed.\r | |
265 | //\r | |
266 | SectionType = EFI_SECTION_DXE_DEPEX;\r | |
267 | Status = Fv->ReadSection (\r | |
268 | DriverEntry->Fv, \r | |
269 | &DriverEntry->FileName,\r | |
270 | SectionType, \r | |
271 | 0, \r | |
272 | &DriverEntry->Depex, \r | |
273 | (UINTN *)&DriverEntry->DepexSize,\r | |
274 | &AuthenticationStatus\r | |
275 | );\r | |
276 | if (EFI_ERROR (Status)) {\r | |
277 | if (Status == EFI_PROTOCOL_ERROR) {\r | |
278 | //\r | |
279 | // The section extraction protocol failed so set protocol error flag\r | |
280 | //\r | |
281 | DriverEntry->DepexProtocolError = TRUE;\r | |
282 | } else {\r | |
283 | //\r | |
8a7d75b0 | 284 | // If no Depex assume UEFI 2.0 driver model\r |
28a00297 | 285 | //\r |
286 | DriverEntry->Depex = NULL;\r | |
287 | DriverEntry->Dependent = TRUE;\r | |
288 | DriverEntry->DepexProtocolError = FALSE;\r | |
289 | }\r | |
290 | } else {\r | |
291 | //\r | |
292 | // Set Before, After, and Unrequested state information based on Depex\r | |
293 | // Driver will be put in Dependent or Unrequested state\r | |
294 | //\r | |
295 | CorePreProcessDepex (DriverEntry);\r | |
296 | DriverEntry->DepexProtocolError = FALSE;\r | |
297 | } \r | |
298 | \r | |
299 | return Status;\r | |
300 | }\r | |
301 | \r | |
162ed594 | 302 | \r |
303 | /**\r | |
304 | Check every driver and locate a matching one. If the driver is found, the Unrequested\r | |
305 | state flag is cleared.\r | |
306 | \r | |
307 | @param FirmwareVolumeHandle The handle of the Firmware Volume that contains \r | |
308 | the firmware file specified by DriverName. \r | |
309 | @param DriverName The Driver name to put in the Dependent state. \r | |
310 | \r | |
311 | @retval EFI_SUCCESS The DriverName was found and it's SOR bit was \r | |
312 | cleared \r | |
313 | @retval EFI_NOT_FOUND The DriverName does not exist or it's SOR bit was \r | |
314 | not set. \r | |
315 | \r | |
316 | **/\r | |
28a00297 | 317 | EFI_DXESERVICE\r |
318 | EFI_STATUS\r | |
319 | EFIAPI\r | |
320 | CoreSchedule (\r | |
321 | IN EFI_HANDLE FirmwareVolumeHandle,\r | |
322 | IN EFI_GUID *DriverName\r | |
323 | )\r | |
28a00297 | 324 | {\r |
325 | LIST_ENTRY *Link;\r | |
326 | EFI_CORE_DRIVER_ENTRY *DriverEntry;\r | |
327 | \r | |
328 | //\r | |
329 | // Check every driver\r | |
330 | //\r | |
331 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
332 | DriverEntry = CR(Link, EFI_CORE_DRIVER_ENTRY, Link, EFI_CORE_DRIVER_ENTRY_SIGNATURE);\r | |
333 | if (DriverEntry->FvHandle == FirmwareVolumeHandle &&\r | |
334 | DriverEntry->Unrequested && \r | |
335 | CompareGuid (DriverName, &DriverEntry->FileName)) {\r | |
336 | //\r | |
337 | // Move the driver from the Unrequested to the Dependent state\r | |
338 | //\r | |
339 | CoreAcquireDispatcherLock ();\r | |
340 | DriverEntry->Unrequested = FALSE;\r | |
341 | DriverEntry->Dependent = TRUE;\r | |
342 | CoreReleaseDispatcherLock ();\r | |
343 | \r | |
344 | return EFI_SUCCESS;\r | |
345 | }\r | |
346 | }\r | |
347 | return EFI_NOT_FOUND; \r | |
348 | }\r | |
349 | \r | |
350 | \r | |
162ed594 | 351 | \r |
352 | /**\r | |
353 | Convert a driver from the Untrused back to the Scheduled state\r | |
354 | \r | |
355 | @param FirmwareVolumeHandle The handle of the Firmware Volume that contains \r | |
356 | the firmware file specified by DriverName. \r | |
357 | @param DriverName The Driver name to put in the Scheduled state \r | |
358 | \r | |
359 | @retval EFI_SUCCESS The file was found in the untrusted state, and it \r | |
360 | was promoted to the trusted state. \r | |
361 | @retval EFI_NOT_FOUND The file was not found in the untrusted state. \r | |
362 | \r | |
363 | **/\r | |
28a00297 | 364 | EFI_DXESERVICE\r |
365 | EFI_STATUS\r | |
366 | EFIAPI\r | |
367 | CoreTrust (\r | |
368 | IN EFI_HANDLE FirmwareVolumeHandle,\r | |
369 | IN EFI_GUID *DriverName\r | |
370 | )\r | |
28a00297 | 371 | {\r |
372 | LIST_ENTRY *Link;\r | |
373 | EFI_CORE_DRIVER_ENTRY *DriverEntry;\r | |
374 | \r | |
375 | //\r | |
376 | // Check every driver\r | |
377 | //\r | |
378 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
379 | DriverEntry = CR(Link, EFI_CORE_DRIVER_ENTRY, Link, EFI_CORE_DRIVER_ENTRY_SIGNATURE);\r | |
380 | if (DriverEntry->FvHandle == FirmwareVolumeHandle &&\r | |
381 | DriverEntry->Untrusted && \r | |
382 | CompareGuid (DriverName, &DriverEntry->FileName)) {\r | |
383 | //\r | |
384 | // Transition driver from Untrusted to Scheduled state.\r | |
385 | //\r | |
386 | CoreAcquireDispatcherLock ();\r | |
387 | DriverEntry->Untrusted = FALSE;\r | |
388 | DriverEntry->Scheduled = TRUE;\r | |
389 | InsertTailList (&mScheduledQueue, &DriverEntry->ScheduledLink);\r | |
390 | CoreReleaseDispatcherLock ();\r | |
391 | \r | |
392 | return EFI_SUCCESS;\r | |
393 | }\r | |
394 | }\r | |
395 | return EFI_NOT_FOUND; \r | |
396 | }\r | |
397 | \r | |
398 | \r | |
28a00297 | 399 | \r |
162ed594 | 400 | /**\r |
401 | This is the main Dispatcher for DXE and it exits when there are no more\r | |
28a00297 | 402 | drivers to run. Drain the mScheduledQueue and load and start a PE\r |
162ed594 | 403 | image for each driver. Search the mDiscoveredList to see if any driver can\r |
28a00297 | 404 | be placed on the mScheduledQueue. If no drivers are placed on the\r |
405 | mScheduledQueue exit the function. On exit it is assumed the Bds()\r | |
162ed594 | 406 | will be called, and when the Bds() exits the Dispatcher will be called\r |
28a00297 | 407 | again.\r |
408 | \r | |
28a00297 | 409 | NONE\r |
410 | \r | |
162ed594 | 411 | @retval EFI_ALREADY_STARTED The DXE Dispatcher is already running \r |
412 | @retval EFI_NOT_FOUND No DXE Drivers were dispatched \r | |
413 | @retval EFI_SUCCESS One or more DXE Drivers were dispatched \r | |
28a00297 | 414 | \r |
162ed594 | 415 | **/\r |
416 | EFI_DXESERVICE\r | |
417 | EFI_STATUS\r | |
418 | EFIAPI\r | |
419 | CoreDispatcher (\r | |
420 | VOID\r | |
421 | )\r | |
28a00297 | 422 | {\r |
423 | EFI_STATUS Status;\r | |
424 | EFI_STATUS ReturnStatus;\r | |
425 | LIST_ENTRY *Link;\r | |
426 | EFI_CORE_DRIVER_ENTRY *DriverEntry;\r | |
427 | BOOLEAN ReadyToRun;\r | |
428 | \r | |
429 | if (gDispatcherRunning) {\r | |
430 | //\r | |
431 | // If the dispatcher is running don't let it be restarted.\r | |
432 | //\r | |
433 | return EFI_ALREADY_STARTED;\r | |
434 | }\r | |
435 | \r | |
436 | gDispatcherRunning = TRUE;\r | |
437 | \r | |
438 | \r | |
439 | ReturnStatus = EFI_NOT_FOUND;\r | |
440 | do {\r | |
441 | //\r | |
442 | // Drain the Scheduled Queue\r | |
443 | //\r | |
444 | while (!IsListEmpty (&mScheduledQueue)) {\r | |
445 | DriverEntry = CR (\r | |
446 | mScheduledQueue.ForwardLink,\r | |
447 | EFI_CORE_DRIVER_ENTRY,\r | |
448 | ScheduledLink,\r | |
449 | EFI_CORE_DRIVER_ENTRY_SIGNATURE\r | |
450 | );\r | |
451 | \r | |
452 | //\r | |
453 | // Load the DXE Driver image into memory. If the Driver was transitioned from\r | |
454 | // Untrused to Scheduled it would have already been loaded so we may need to\r | |
455 | // skip the LoadImage\r | |
456 | //\r | |
457 | if (DriverEntry->ImageHandle == NULL) {\r | |
458 | Status = CoreLoadImage (\r | |
459 | FALSE, \r | |
460 | gDxeCoreImageHandle, \r | |
461 | DriverEntry->FvFileDevicePath,\r | |
462 | NULL, \r | |
463 | 0, \r | |
464 | &DriverEntry->ImageHandle\r | |
465 | );\r | |
466 | \r | |
467 | //\r | |
468 | // Update the driver state to reflect that it's been loaded\r | |
469 | //\r | |
470 | if (EFI_ERROR (Status)) {\r | |
471 | CoreAcquireDispatcherLock ();\r | |
472 | \r | |
473 | if (Status == EFI_SECURITY_VIOLATION) {\r | |
474 | //\r | |
475 | // Take driver from Scheduled to Untrused state\r | |
476 | //\r | |
477 | DriverEntry->Untrusted = TRUE;\r | |
478 | } else {\r | |
479 | //\r | |
480 | // The DXE Driver could not be loaded, and do not attempt to load or start it again.\r | |
481 | // Take driver from Scheduled to Initialized. \r | |
482 | //\r | |
483 | // This case include the Never Trusted state if EFI_ACCESS_DENIED is returned\r | |
484 | //\r | |
485 | DriverEntry->Initialized = TRUE;\r | |
486 | }\r | |
487 | \r | |
488 | DriverEntry->Scheduled = FALSE;\r | |
489 | RemoveEntryList (&DriverEntry->ScheduledLink);\r | |
490 | \r | |
491 | CoreReleaseDispatcherLock ();\r | |
492 | \r | |
493 | //\r | |
494 | // If it's an error don't try the StartImage\r | |
495 | //\r | |
496 | continue;\r | |
497 | }\r | |
498 | }\r | |
499 | \r | |
500 | CoreAcquireDispatcherLock ();\r | |
501 | \r | |
502 | DriverEntry->Scheduled = FALSE;\r | |
503 | DriverEntry->Initialized = TRUE;\r | |
504 | RemoveEntryList (&DriverEntry->ScheduledLink);\r | |
505 | \r | |
506 | CoreReleaseDispatcherLock ();\r | |
507 | \r | |
797a9d67 | 508 | CoreReportProgressCodeSpecific (\r |
509 | FixedPcdGet32(PcdStatusCodeValueDxeDriverBegin), \r | |
510 | DriverEntry->ImageHandle\r | |
511 | );\r | |
28a00297 | 512 | Status = CoreStartImage (DriverEntry->ImageHandle, NULL, NULL);\r |
797a9d67 | 513 | CoreReportProgressCodeSpecific (\r |
514 | FixedPcdGet32(PcdStatusCodeValueDxeDriverEnd), \r | |
515 | DriverEntry->ImageHandle\r | |
516 | );\r | |
28a00297 | 517 | \r |
518 | ReturnStatus = EFI_SUCCESS;\r | |
519 | }\r | |
520 | \r | |
521 | //\r | |
522 | // Search DriverList for items to place on Scheduled Queue\r | |
523 | //\r | |
524 | ReadyToRun = FALSE;\r | |
525 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
526 | DriverEntry = CR (Link, EFI_CORE_DRIVER_ENTRY, Link, EFI_CORE_DRIVER_ENTRY_SIGNATURE);\r | |
527 | \r | |
528 | if (DriverEntry->DepexProtocolError){\r | |
529 | //\r | |
530 | // If Section Extraction Protocol did not let the Depex be read before retry the read\r | |
531 | //\r | |
532 | Status = CoreGetDepexSectionAndPreProccess (DriverEntry);\r | |
533 | } \r | |
534 | \r | |
535 | if (DriverEntry->Dependent) {\r | |
536 | if (CoreIsSchedulable (DriverEntry)) {\r | |
537 | CoreInsertOnScheduledQueueWhileProcessingBeforeAndAfter (DriverEntry); \r | |
538 | ReadyToRun = TRUE;\r | |
539 | } \r | |
540 | }\r | |
541 | }\r | |
542 | } while (ReadyToRun);\r | |
543 | \r | |
544 | gDispatcherRunning = FALSE;\r | |
545 | \r | |
546 | return ReturnStatus;\r | |
547 | }\r | |
548 | \r | |
28a00297 | 549 | \r |
162ed594 | 550 | /**\r |
551 | Insert InsertedDriverEntry onto the mScheduledQueue. To do this you\r | |
28a00297 | 552 | must add any driver with a before dependency on InsertedDriverEntry first.\r |
553 | You do this by recursively calling this routine. After all the Befores are\r | |
162ed594 | 554 | processed you can add InsertedDriverEntry to the mScheduledQueue.\r |
555 | Then you can add any driver with an After dependency on InsertedDriverEntry\r | |
28a00297 | 556 | by recursively calling this routine.\r |
557 | \r | |
162ed594 | 558 | @param InsertedDriverEntry The driver to insert on the ScheduledLink Queue\r |
28a00297 | 559 | \r |
162ed594 | 560 | **/\r |
561 | STATIC\r | |
562 | VOID\r | |
563 | CoreInsertOnScheduledQueueWhileProcessingBeforeAndAfter (\r | |
564 | IN EFI_CORE_DRIVER_ENTRY *InsertedDriverEntry\r | |
565 | )\r | |
28a00297 | 566 | {\r |
567 | LIST_ENTRY *Link;\r | |
568 | EFI_CORE_DRIVER_ENTRY *DriverEntry;\r | |
569 | \r | |
570 | //\r | |
571 | // Process Before Dependency\r | |
572 | //\r | |
573 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
574 | DriverEntry = CR(Link, EFI_CORE_DRIVER_ENTRY, Link, EFI_CORE_DRIVER_ENTRY_SIGNATURE);\r | |
575 | if (DriverEntry->Before && DriverEntry->Dependent) {\r | |
576 | if (CompareGuid (&InsertedDriverEntry->FileName, &DriverEntry->BeforeAfterGuid)) {\r | |
577 | //\r | |
578 | // Recursively process BEFORE\r | |
579 | //\r | |
580 | CoreInsertOnScheduledQueueWhileProcessingBeforeAndAfter (DriverEntry);\r | |
581 | }\r | |
582 | }\r | |
583 | }\r | |
584 | \r | |
585 | //\r | |
586 | // Convert driver from Dependent to Scheduled state\r | |
587 | //\r | |
588 | CoreAcquireDispatcherLock ();\r | |
589 | \r | |
590 | InsertedDriverEntry->Dependent = FALSE;\r | |
591 | InsertedDriverEntry->Scheduled = TRUE;\r | |
592 | InsertTailList (&mScheduledQueue, &InsertedDriverEntry->ScheduledLink);\r | |
593 | \r | |
594 | CoreReleaseDispatcherLock ();\r | |
595 | \r | |
596 | //\r | |
597 | // Process After Dependency\r | |
598 | //\r | |
599 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
600 | DriverEntry = CR(Link, EFI_CORE_DRIVER_ENTRY, Link, EFI_CORE_DRIVER_ENTRY_SIGNATURE);\r | |
601 | if (DriverEntry->After && DriverEntry->Dependent) {\r | |
602 | if (CompareGuid (&InsertedDriverEntry->FileName, &DriverEntry->BeforeAfterGuid)) {\r | |
603 | //\r | |
604 | // Recursively process AFTER\r | |
605 | //\r | |
606 | CoreInsertOnScheduledQueueWhileProcessingBeforeAndAfter (DriverEntry);\r | |
607 | }\r | |
608 | }\r | |
609 | }\r | |
610 | }\r | |
611 | \r | |
28a00297 | 612 | \r |
162ed594 | 613 | /**\r |
28a00297 | 614 | Return TRUE if the Fv has been processed, FALSE if not.\r |
615 | \r | |
162ed594 | 616 | @param FvHandle The handle of a FV that's being tested \r |
28a00297 | 617 | \r |
162ed594 | 618 | @retval TRUE Fv protocol on FvHandle has been processed \r |
619 | @retval FALSE Fv protocol on FvHandle has not yet been \r | |
620 | processed\r | |
28a00297 | 621 | \r |
162ed594 | 622 | **/\r |
623 | STATIC\r | |
624 | BOOLEAN\r | |
625 | FvHasBeenProcessed (\r | |
626 | IN EFI_HANDLE FvHandle\r | |
627 | )\r | |
28a00297 | 628 | {\r |
629 | LIST_ENTRY *Link;\r | |
630 | KNOWN_HANDLE *KnownHandle;\r | |
631 | \r | |
632 | for (Link = mFvHandleList.ForwardLink; Link != &mFvHandleList; Link = Link->ForwardLink) {\r | |
633 | KnownHandle = CR(Link, KNOWN_HANDLE, Link, KNOWN_HANDLE_SIGNATURE);\r | |
634 | if (KnownHandle->Handle == FvHandle) {\r | |
635 | return TRUE;\r | |
636 | }\r | |
637 | }\r | |
638 | return FALSE;\r | |
639 | }\r | |
640 | \r | |
28a00297 | 641 | \r |
162ed594 | 642 | /**\r |
28a00297 | 643 | Remember that Fv protocol on FvHandle has had it's drivers placed on the\r |
644 | mDiscoveredList. This fucntion adds entries on the mFvHandleList. Items are\r | |
645 | never removed/freed from the mFvHandleList.\r | |
646 | \r | |
162ed594 | 647 | @param FvHandle The handle of a FV that has been processed\r |
28a00297 | 648 | \r |
162ed594 | 649 | **/\r |
650 | STATIC\r | |
651 | VOID\r | |
652 | FvIsBeingProcesssed (\r | |
653 | IN EFI_HANDLE FvHandle\r | |
654 | )\r | |
28a00297 | 655 | {\r |
656 | KNOWN_HANDLE *KnownHandle;\r | |
657 | \r | |
658 | KnownHandle = CoreAllocateBootServicesPool (sizeof (KNOWN_HANDLE));\r | |
659 | ASSERT (KnownHandle != NULL);\r | |
660 | \r | |
661 | KnownHandle->Signature = KNOWN_HANDLE_SIGNATURE;\r | |
662 | KnownHandle->Handle = FvHandle;\r | |
663 | InsertTailList (&mFvHandleList, &KnownHandle->Link);\r | |
664 | }\r | |
665 | \r | |
666 | \r | |
667 | \r | |
162ed594 | 668 | \r |
669 | /**\r | |
670 | Convert FvHandle and DriverName into an EFI device path\r | |
671 | \r | |
672 | @param Fv Fv protocol, needed to read Depex info out of \r | |
673 | FLASH. \r | |
674 | @param FvHandle Handle for Fv, needed in the \r | |
675 | EFI_CORE_DRIVER_ENTRY so that the PE image can be \r | |
676 | read out of the FV at a later time. \r | |
677 | @param DriverName Name of driver to add to mDiscoveredList. \r | |
678 | \r | |
679 | @return Pointer to device path constructed from FvHandle and DriverName\r | |
680 | \r | |
681 | **/\r | |
28a00297 | 682 | STATIC\r |
683 | EFI_DEVICE_PATH_PROTOCOL *\r | |
684 | CoreFvToDevicePath (\r | |
0c2b5da8 | 685 | IN EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv,\r |
28a00297 | 686 | IN EFI_HANDLE FvHandle,\r |
687 | IN EFI_GUID *DriverName\r | |
688 | )\r | |
28a00297 | 689 | {\r |
690 | EFI_STATUS Status;\r | |
691 | EFI_DEVICE_PATH_PROTOCOL *FvDevicePath;\r | |
692 | EFI_DEVICE_PATH_PROTOCOL *FileNameDevicePath;\r | |
693 | \r | |
694 | //\r | |
695 | // Remember the device path of the FV\r | |
696 | //\r | |
697 | Status = CoreHandleProtocol (FvHandle, &gEfiDevicePathProtocolGuid, (VOID **)&FvDevicePath);\r | |
698 | if (EFI_ERROR (Status)) {\r | |
699 | FileNameDevicePath = NULL;\r | |
700 | } else {\r | |
701 | //\r | |
702 | // Build a device path to the file in the FV to pass into gBS->LoadImage\r | |
703 | //\r | |
704 | EfiInitializeFwVolDevicepathNode (&mFvDevicePath.File, DriverName);\r | |
705 | mFvDevicePath.End.Type = EFI_END_ENTIRE_DEVICE_PATH;\r | |
706 | mFvDevicePath.End.SubType = END_ENTIRE_DEVICE_PATH_SUBTYPE;\r | |
707 | SetDevicePathNodeLength (&mFvDevicePath.End, sizeof (EFI_DEVICE_PATH_PROTOCOL));\r | |
708 | \r | |
709 | FileNameDevicePath = CoreAppendDevicePath (\r | |
710 | FvDevicePath, \r | |
711 | (EFI_DEVICE_PATH_PROTOCOL *)&mFvDevicePath\r | |
712 | );\r | |
713 | }\r | |
714 | \r | |
715 | return FileNameDevicePath;\r | |
716 | }\r | |
717 | \r | |
718 | \r | |
719 | \r | |
28a00297 | 720 | \r |
162ed594 | 721 | /**\r |
722 | Add an entry to the mDiscoveredList. Allocate memory to store the DriverEntry,\r | |
28a00297 | 723 | and initilize any state variables. Read the Depex from the FV and store it\r |
724 | in DriverEntry. Pre-process the Depex to set the SOR, Before and After state.\r | |
725 | The Discovered list is never free'ed and contains booleans that represent the\r | |
726 | other possible DXE driver states.\r | |
727 | \r | |
162ed594 | 728 | @param Fv Fv protocol, needed to read Depex info out of \r |
729 | FLASH. \r | |
730 | @param FvHandle Handle for Fv, needed in the \r | |
731 | EFI_CORE_DRIVER_ENTRY so that the PE image can be \r | |
732 | read out of the FV at a later time. \r | |
733 | @param DriverName Name of driver to add to mDiscoveredList. \r | |
28a00297 | 734 | \r |
162ed594 | 735 | @retval EFI_SUCCESS If driver was added to the mDiscoveredList. \r |
736 | @retval EFI_ALREADY_STARTED The driver has already been started. Only one \r | |
737 | DriverName may be active in the system at any one \r | |
738 | time.\r | |
28a00297 | 739 | \r |
162ed594 | 740 | **/\r |
741 | EFI_STATUS\r | |
742 | CoreAddToDriverList (\r | |
743 | IN EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv,\r | |
744 | IN EFI_HANDLE FvHandle,\r | |
745 | IN EFI_GUID *DriverName\r | |
746 | )\r | |
28a00297 | 747 | {\r |
748 | EFI_CORE_DRIVER_ENTRY *DriverEntry;\r | |
749 | \r | |
750 | \r | |
751 | //\r | |
752 | // Create the Driver Entry for the list. ZeroPool initializes lots of variables to \r | |
753 | // NULL or FALSE.\r | |
754 | //\r | |
755 | DriverEntry = CoreAllocateZeroBootServicesPool (sizeof (EFI_CORE_DRIVER_ENTRY));\r | |
756 | ASSERT (DriverEntry != NULL);\r | |
757 | \r | |
758 | DriverEntry->Signature = EFI_CORE_DRIVER_ENTRY_SIGNATURE;\r | |
759 | CopyMem (&DriverEntry->FileName, DriverName, sizeof (EFI_GUID));\r | |
760 | DriverEntry->FvHandle = FvHandle;\r | |
761 | DriverEntry->Fv = Fv;\r | |
762 | DriverEntry->FvFileDevicePath = CoreFvToDevicePath (Fv, FvHandle, DriverName);\r | |
763 | \r | |
764 | CoreGetDepexSectionAndPreProccess (DriverEntry);\r | |
765 | \r | |
766 | CoreAcquireDispatcherLock ();\r | |
767 | \r | |
768 | InsertTailList (&mDiscoveredList, &DriverEntry->Link);\r | |
769 | \r | |
770 | CoreReleaseDispatcherLock ();\r | |
771 | \r | |
772 | return EFI_SUCCESS;\r | |
773 | }\r | |
774 | \r | |
bbc0f1bb | 775 | \r |
162ed594 | 776 | /**\r |
bbc0f1bb | 777 | Check if a FV Image type file (EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE) is\r |
778 | described by a EFI_HOB_FIRMWARE_VOLUME2 Hob.\r | |
779 | \r | |
162ed594 | 780 | @param FvHandle The handle which FVB protocol installed on. \r |
781 | @param DriverName The driver guid specified. \r | |
bbc0f1bb | 782 | \r |
162ed594 | 783 | @retval TRUE This file is found in a EFI_HOB_FIRMWARE_VOLUME2 \r |
784 | Hob. \r | |
785 | @retval FALSE Not found.\r | |
bbc0f1bb | 786 | \r |
162ed594 | 787 | **/\r |
788 | STATIC\r | |
789 | BOOLEAN\r | |
790 | FvFoundInHobFv2 (\r | |
791 | IN EFI_HANDLE FvHandle,\r | |
792 | IN CONST EFI_GUID *DriverName\r | |
793 | )\r | |
bbc0f1bb | 794 | {\r |
795 | EFI_PEI_HOB_POINTERS HobFv2;\r | |
bbc0f1bb | 796 | \r |
797 | HobFv2.Raw = GetHobList ();\r | |
798 | \r | |
799 | while ((HobFv2.Raw = GetNextHob (EFI_HOB_TYPE_FV2, HobFv2.Raw)) != NULL) {\r | |
800 | if (CompareGuid (DriverName, &HobFv2.FirmwareVolume2->FileName)) {\r | |
b0d803fe | 801 | return TRUE;\r |
bbc0f1bb | 802 | }\r |
803 | HobFv2.Raw = GET_NEXT_HOB (HobFv2);\r | |
804 | }\r | |
805 | \r | |
806 | return FALSE;\r | |
807 | }\r | |
28a00297 | 808 | \r |
809 | \r | |
162ed594 | 810 | \r |
811 | /**\r | |
812 | Get the driver from the FV through driver name, and produce a FVB protocol on FvHandle.\r | |
813 | \r | |
814 | @param Fv The FIRMWARE_VOLUME protocol installed on the FV. \r | |
815 | @param FvHandle The handle which FVB protocol installed on. \r | |
816 | @param DriverName The driver guid specified. \r | |
817 | \r | |
818 | @retval EFI_OUT_OF_RESOURCES No enough memory or other resource. \r | |
819 | @retval EFI_VOLUME_CORRUPTED Corrupted volume. \r | |
820 | @retval EFI_SUCCESS Function successfully returned.\r | |
821 | \r | |
822 | **/\r | |
28a00297 | 823 | EFI_STATUS \r |
824 | CoreProcessFvImageFile (\r | |
0c2b5da8 | 825 | IN EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv,\r |
28a00297 | 826 | IN EFI_HANDLE FvHandle,\r |
827 | IN EFI_GUID *DriverName\r | |
828 | )\r | |
28a00297 | 829 | {\r |
830 | EFI_STATUS Status;\r | |
831 | EFI_SECTION_TYPE SectionType;\r | |
832 | UINT32 AuthenticationStatus;\r | |
833 | VOID *Buffer;\r | |
38837959 | 834 | VOID *AlignedBuffer;\r |
28a00297 | 835 | UINTN BufferSize;\r |
38837959 LG |
836 | EFI_FIRMWARE_VOLUME_HEADER *FvHeader;\r |
837 | UINT32 FvAlignment; \r | |
28a00297 | 838 | \r |
839 | //\r | |
840 | // Read the first (and only the first) firmware volume section\r | |
841 | //\r | |
842 | SectionType = EFI_SECTION_FIRMWARE_VOLUME_IMAGE;\r | |
38837959 LG |
843 | FvHeader = NULL;\r |
844 | FvAlignment = 0;\r | |
28a00297 | 845 | Buffer = NULL;\r |
846 | BufferSize = 0;\r | |
38837959 | 847 | AlignedBuffer = NULL;\r |
28a00297 | 848 | Status = Fv->ReadSection (\r |
849 | Fv, \r | |
850 | DriverName, \r | |
851 | SectionType, \r | |
852 | 0, \r | |
853 | &Buffer, \r | |
854 | &BufferSize,\r | |
855 | &AuthenticationStatus\r | |
856 | );\r | |
857 | if (!EFI_ERROR (Status)) {\r | |
858 | //\r | |
38837959 | 859 | // FvImage should be at its required alignment.\r |
28a00297 | 860 | //\r |
38837959 LG |
861 | FvHeader = (EFI_FIRMWARE_VOLUME_HEADER *) Buffer;\r |
862 | FvAlignment = 1 << ((FvHeader->Attributes & EFI_FVB2_ALIGNMENT) >> 16);\r | |
863 | //\r | |
864 | // FvAlignment must be more than 8 bytes required by FvHeader structure.\r | |
865 | // \r | |
866 | if (FvAlignment < 8) {\r | |
867 | FvAlignment = 8;\r | |
868 | }\r | |
b2c5e194 | 869 | AlignedBuffer = AllocateAlignedPages (EFI_SIZE_TO_PAGES (BufferSize), (UINTN) FvAlignment);\r |
38837959 LG |
870 | if (AlignedBuffer == NULL) {\r |
871 | Status = EFI_OUT_OF_RESOURCES;\r | |
872 | } else {\r | |
873 | //\r | |
874 | // Move FvImage into the aligned buffer and release the original buffer.\r | |
875 | //\r | |
876 | CopyMem (AlignedBuffer, Buffer, BufferSize);\r | |
877 | CoreFreePool (Buffer);\r | |
878 | Buffer = NULL;\r | |
879 | //\r | |
880 | // Produce a FVB protocol for the file\r | |
881 | //\r | |
882 | Status = ProduceFVBProtocolOnBuffer (\r | |
883 | (EFI_PHYSICAL_ADDRESS) (UINTN) AlignedBuffer,\r | |
884 | (UINT64)BufferSize,\r | |
885 | FvHandle,\r | |
886 | NULL\r | |
887 | );\r | |
888 | }\r | |
28a00297 | 889 | }\r |
890 | \r | |
38837959 LG |
891 | if (EFI_ERROR (Status)) { \r |
892 | //\r | |
893 | // ReadSection or Produce FVB failed, Free data buffer\r | |
894 | //\r | |
895 | if (Buffer != NULL) {\r | |
896 | CoreFreePool (Buffer); \r | |
897 | }\r | |
898 | \r | |
899 | if (AlignedBuffer != NULL) {\r | |
b2c5e194 | 900 | FreeAlignedPages (AlignedBuffer, EFI_SIZE_TO_PAGES (BufferSize));\r |
38837959 | 901 | }\r |
28a00297 | 902 | }\r |
903 | \r | |
904 | return Status;\r | |
905 | }\r | |
906 | \r | |
28a00297 | 907 | \r |
162ed594 | 908 | /**\r |
909 | Event notification that is fired every time a FV dispatch protocol is added.\r | |
28a00297 | 910 | More than one protocol may have been added when this event is fired, so you\r |
911 | must loop on CoreLocateHandle () to see how many protocols were added and\r | |
912 | do the following to each FV:\r | |
162ed594 | 913 | If the Fv has already been processed, skip it. If the Fv has not been\r |
28a00297 | 914 | processed then mark it as being processed, as we are about to process it.\r |
162ed594 | 915 | Read the Fv and add any driver in the Fv to the mDiscoveredList.The\r |
28a00297 | 916 | mDiscoveredList is never free'ed and contains variables that define\r |
162ed594 | 917 | the other states the DXE driver transitions to..\r |
28a00297 | 918 | While you are at it read the A Priori file into memory.\r |
919 | Place drivers in the A Priori list onto the mScheduledQueue.\r | |
920 | \r | |
162ed594 | 921 | @param Event The Event that is being processed, not used. \r |
922 | @param Context Event Context, not used.\r | |
28a00297 | 923 | \r |
162ed594 | 924 | **/\r |
925 | STATIC\r | |
926 | VOID\r | |
927 | EFIAPI\r | |
928 | CoreFwVolEventProtocolNotify (\r | |
929 | IN EFI_EVENT Event,\r | |
930 | IN VOID *Context\r | |
931 | )\r | |
28a00297 | 932 | {\r |
933 | EFI_STATUS Status;\r | |
934 | EFI_STATUS GetNextFileStatus;\r | |
935 | EFI_STATUS SecurityStatus;\r | |
0c2b5da8 | 936 | EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv;\r |
28a00297 | 937 | EFI_DEVICE_PATH_PROTOCOL *FvDevicePath;\r |
938 | EFI_HANDLE FvHandle;\r | |
939 | UINTN BufferSize;\r | |
940 | EFI_GUID NameGuid;\r | |
941 | UINTN Key;\r | |
942 | EFI_FV_FILETYPE Type;\r | |
943 | EFI_FV_FILE_ATTRIBUTES Attributes;\r | |
944 | UINTN Size;\r | |
945 | EFI_CORE_DRIVER_ENTRY *DriverEntry;\r | |
946 | EFI_GUID *AprioriFile;\r | |
947 | UINTN AprioriEntryCount;\r | |
948 | UINTN Index;\r | |
949 | LIST_ENTRY *Link;\r | |
950 | UINT32 AuthenticationStatus;\r | |
951 | UINTN SizeOfBuffer;\r | |
952 | \r | |
953 | \r | |
954 | while (TRUE) {\r | |
955 | BufferSize = sizeof (EFI_HANDLE);\r | |
956 | Status = CoreLocateHandle (\r | |
957 | ByRegisterNotify,\r | |
958 | NULL,\r | |
959 | mFwVolEventRegistration,\r | |
960 | &BufferSize,\r | |
961 | &FvHandle\r | |
962 | );\r | |
963 | if (EFI_ERROR (Status)) {\r | |
964 | //\r | |
965 | // If no more notification events exit\r | |
966 | //\r | |
967 | return;\r | |
968 | }\r | |
969 | \r | |
970 | if (FvHasBeenProcessed (FvHandle)) {\r | |
971 | //\r | |
972 | // This Fv has already been processed so lets skip it!\r | |
973 | //\r | |
974 | continue;\r | |
975 | }\r | |
976 | \r | |
977 | Status = CoreHandleProtocol (FvHandle, &gEfiFirmwareVolumeDispatchProtocolGuid, (VOID **)&Fv);\r | |
978 | if (EFI_ERROR (Status)) {\r | |
979 | //\r | |
980 | // If no dispatch protocol then skip, but do not marked as being processed as it\r | |
981 | // may show up later.\r | |
982 | //\r | |
983 | continue;\r | |
984 | }\r | |
985 | \r | |
986 | //\r | |
987 | // Since we are about to process this Fv mark it as processed.\r | |
988 | //\r | |
989 | FvIsBeingProcesssed (FvHandle);\r | |
990 | \r | |
991 | \r | |
0c2b5da8 | 992 | Status = CoreHandleProtocol (FvHandle, &gEfiFirmwareVolume2ProtocolGuid, (VOID **)&Fv);\r |
28a00297 | 993 | if (EFI_ERROR (Status)) {\r |
994 | //\r | |
995 | // The Handle has a FirmwareVolumeDispatch protocol and should also contiain\r | |
996 | // a FirmwareVolume protocol thus we should never get here.\r | |
997 | //\r | |
998 | ASSERT (FALSE);\r | |
999 | continue;\r | |
1000 | }\r | |
1001 | \r | |
1002 | Status = CoreHandleProtocol (FvHandle, &gEfiDevicePathProtocolGuid, (VOID **)&FvDevicePath);\r | |
1003 | if (EFI_ERROR (Status)) {\r | |
1004 | //\r | |
1005 | // The Firmware volume doesn't have device path, can't be dispatched.\r | |
1006 | //\r | |
1007 | continue;\r | |
1008 | }\r | |
1009 | \r | |
1010 | //\r | |
1011 | // Evaluate the authentication status of the Firmware Volume through \r | |
1012 | // Security Architectural Protocol\r | |
1013 | //\r | |
1014 | if (gSecurity != NULL) {\r | |
1015 | SecurityStatus = gSecurity->FileAuthenticationState (\r | |
1016 | gSecurity, \r | |
1017 | 0, \r | |
1018 | FvDevicePath\r | |
1019 | );\r | |
1020 | if (SecurityStatus != EFI_SUCCESS) {\r | |
1021 | //\r | |
1022 | // Security check failed. The firmware volume should not be used for any purpose.\r | |
1023 | //\r | |
1024 | continue;\r | |
1025 | }\r | |
1026 | } \r | |
1027 | \r | |
1028 | //\r | |
1029 | // Discover Drivers in FV and add them to the Discovered Driver List. \r | |
1030 | // Process EFI_FV_FILETYPE_DRIVER type and then EFI_FV_FILETYPE_COMBINED_PEIM_DRIVER \r | |
1031 | // EFI_FV_FILETYPE_DXE_CORE is processed to produce a Loaded Image protocol for the core\r | |
1032 | // EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE is processed to create a Fvb\r | |
1033 | //\r | |
1034 | for (Index = 0; Index < sizeof (mDxeFileTypes)/sizeof (EFI_FV_FILETYPE); Index++) {\r | |
1035 | //\r | |
1036 | // Initialize the search key\r | |
1037 | //\r | |
1038 | Key = 0;\r | |
1039 | do {\r | |
1040 | Type = mDxeFileTypes[Index];\r | |
1041 | GetNextFileStatus = Fv->GetNextFile (\r | |
1042 | Fv, \r | |
1043 | &Key,\r | |
1044 | &Type, \r | |
1045 | &NameGuid, \r | |
1046 | &Attributes, \r | |
1047 | &Size\r | |
1048 | );\r | |
1049 | if (!EFI_ERROR (GetNextFileStatus)) {\r | |
1050 | if (Type == EFI_FV_FILETYPE_DXE_CORE) {\r | |
1051 | //\r | |
1052 | // If this is the DXE core fill in it's DevicePath & DeviceHandle\r | |
1053 | //\r | |
1054 | if (gDxeCoreLoadedImage->FilePath == NULL) {\r | |
1055 | if (CompareGuid (&NameGuid, gDxeCoreFileName)) {\r | |
1056 | //\r | |
1057 | // Maybe One specail Fv cantains only one DXE_CORE module, so its device path must\r | |
1058 | // be initialized completely.\r | |
1059 | //\r | |
1060 | EfiInitializeFwVolDevicepathNode (&mFvDevicePath.File, &NameGuid);\r | |
1061 | mFvDevicePath.End.Type = EFI_END_ENTIRE_DEVICE_PATH;\r | |
1062 | mFvDevicePath.End.SubType = END_ENTIRE_DEVICE_PATH_SUBTYPE;\r | |
1063 | SetDevicePathNodeLength (&mFvDevicePath.End, sizeof (EFI_DEVICE_PATH_PROTOCOL));\r | |
1064 | \r | |
1065 | gDxeCoreLoadedImage->FilePath = CoreDuplicateDevicePath (\r | |
1066 | (EFI_DEVICE_PATH_PROTOCOL *)&mFvDevicePath\r | |
1067 | );\r | |
1068 | gDxeCoreLoadedImage->DeviceHandle = FvHandle;\r | |
1069 | }\r | |
1070 | }\r | |
1071 | } else if (Type == EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE) {\r | |
bbc0f1bb | 1072 | //\r |
1073 | // Check if this EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE file has already \r | |
1074 | // been extracted.\r | |
1075 | //\r | |
1076 | if (FvFoundInHobFv2 (FvHandle, &NameGuid)) {\r | |
1077 | continue;\r | |
1078 | }\r | |
28a00297 | 1079 | //\r |
1080 | // Found a firmware volume image. Produce a firmware volume block\r | |
1081 | // protocol for it so it gets dispatched from. This is usually a \r | |
1082 | // capsule.\r | |
1083 | //\r | |
1084 | CoreProcessFvImageFile (Fv, FvHandle, &NameGuid);\r | |
1085 | } else {\r | |
1086 | //\r | |
1087 | // Transition driver from Undiscovered to Discovered state\r | |
1088 | //\r | |
1089 | CoreAddToDriverList (Fv, FvHandle, &NameGuid);\r | |
1090 | }\r | |
1091 | }\r | |
1092 | } while (!EFI_ERROR (GetNextFileStatus));\r | |
1093 | }\r | |
1094 | \r | |
1095 | //\r | |
1096 | // Read the array of GUIDs from the Apriori file if it is present in the firmware volume\r | |
1097 | //\r | |
1098 | AprioriFile = NULL;\r | |
1099 | Status = Fv->ReadSection (\r | |
1100 | Fv,\r | |
1101 | &gAprioriGuid,\r | |
1102 | EFI_SECTION_RAW,\r | |
1103 | 0,\r | |
1104 | (VOID **)&AprioriFile,\r | |
1105 | &SizeOfBuffer,\r | |
1106 | &AuthenticationStatus\r | |
1107 | );\r | |
1108 | if (!EFI_ERROR (Status)) {\r | |
1109 | AprioriEntryCount = SizeOfBuffer / sizeof (EFI_GUID);\r | |
1110 | } else {\r | |
1111 | AprioriEntryCount = 0;\r | |
1112 | }\r | |
1113 | \r | |
1114 | //\r | |
1115 | // Put drivers on Apriori List on the Scheduled queue. The Discovered List includes\r | |
1116 | // drivers not in the current FV and these must be skipped since the a priori list\r | |
1117 | // is only valid for the FV that it resided in.\r | |
1118 | //\r | |
1119 | CoreAcquireDispatcherLock ();\r | |
1120 | \r | |
1121 | for (Index = 0; Index < AprioriEntryCount; Index++) {\r | |
1122 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
1123 | DriverEntry = CR(Link, EFI_CORE_DRIVER_ENTRY, Link, EFI_CORE_DRIVER_ENTRY_SIGNATURE);\r | |
1124 | if (CompareGuid (&DriverEntry->FileName, &AprioriFile[Index]) &&\r | |
1125 | (FvHandle == DriverEntry->FvHandle)) {\r | |
1126 | DriverEntry->Dependent = FALSE;\r | |
1127 | DriverEntry->Scheduled = TRUE;\r | |
1128 | InsertTailList (&mScheduledQueue, &DriverEntry->ScheduledLink);\r | |
1129 | break;\r | |
1130 | }\r | |
1131 | }\r | |
1132 | }\r | |
1133 | \r | |
1134 | CoreReleaseDispatcherLock ();\r | |
1135 | \r | |
1136 | //\r | |
1137 | // Free data allocated by Fv->ReadSection () \r | |
1138 | //\r | |
1139 | CoreFreePool (AprioriFile); \r | |
1140 | }\r | |
1141 | }\r | |
1142 | \r | |
1143 | \r | |
28a00297 | 1144 | \r |
162ed594 | 1145 | /**\r |
28a00297 | 1146 | Initialize the dispatcher. Initialize the notification function that runs when\r |
1147 | a FV protocol is added to the system.\r | |
1148 | \r | |
162ed594 | 1149 | **/\r |
1150 | VOID\r | |
1151 | CoreInitializeDispatcher (\r | |
1152 | VOID\r | |
1153 | )\r | |
28a00297 | 1154 | {\r |
1155 | mFwVolEvent = CoreCreateProtocolNotifyEvent (\r | |
0c2b5da8 | 1156 | &gEfiFirmwareVolume2ProtocolGuid, \r |
28a00297 | 1157 | TPL_CALLBACK,\r |
1158 | CoreFwVolEventProtocolNotify,\r | |
1159 | NULL,\r | |
1160 | &mFwVolEventRegistration,\r | |
1161 | TRUE\r | |
1162 | );\r | |
1163 | }\r | |
1164 | \r | |
1165 | //\r | |
1166 | // Function only used in debug builds\r | |
1167 | //\r | |
162ed594 | 1168 | \r |
1169 | /**\r | |
1170 | Traverse the discovered list for any drivers that were discovered but not loaded\r | |
1171 | because the dependency experessions evaluated to false.\r | |
1172 | \r | |
1173 | **/\r | |
28a00297 | 1174 | VOID\r |
1175 | CoreDisplayDiscoveredNotDispatched (\r | |
1176 | VOID\r | |
1177 | )\r | |
28a00297 | 1178 | {\r |
1179 | LIST_ENTRY *Link;\r | |
1180 | EFI_CORE_DRIVER_ENTRY *DriverEntry;\r | |
1181 | \r | |
1182 | for (Link = mDiscoveredList.ForwardLink;Link !=&mDiscoveredList; Link = Link->ForwardLink) {\r | |
1183 | DriverEntry = CR(Link, EFI_CORE_DRIVER_ENTRY, Link, EFI_CORE_DRIVER_ENTRY_SIGNATURE);\r | |
1184 | if (DriverEntry->Dependent) {\r | |
162ed594 | 1185 | DEBUG ((DEBUG_LOAD, "Driver %g was discovered but not loaded!!\n", &DriverEntry->FileName));\r |
28a00297 | 1186 | }\r |
1187 | }\r | |
1188 | }\r |