878ddf1f |
1 | /*++\r |
2 | \r |
3 | Copyright (c) 2006, Intel Corporation \r |
4 | All rights reserved. This program and the accompanying materials \r |
5 | are licensed and made available under the terms and conditions of the BSD License \r |
6 | which accompanies this distribution. The full text of the license may be found at \r |
7 | http://opensource.org/licenses/bsd-license.php \r |
8 | \r |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r |
11 | \r |
12 | Module Name:\r |
13 | \r |
14 | Dispatcher.c\r |
15 | \r |
16 | Abstract:\r |
17 | \r |
18 | Tiano DXE Dispatcher.\r |
19 | \r |
20 | Step #1 - When a FV protocol is added to the system every driver in the FV\r |
21 | is added to the mDiscoveredList. The SOR, Before, and After Depex are \r |
22 | pre-processed as drivers are added to the mDiscoveredList. If an Apriori \r |
23 | file exists in the FV those drivers are addeded to the \r |
24 | mScheduledQueue. The mFvHandleList is used to make sure a \r |
25 | FV is only processed once.\r |
26 | \r |
27 | Step #2 - Dispatch. Remove driver from the mScheduledQueue and load and\r |
28 | start it. After mScheduledQueue is drained check the \r |
29 | mDiscoveredList to see if any item has a Depex that is ready to \r |
30 | be placed on the mScheduledQueue.\r |
31 | \r |
32 | Step #3 - Adding to the mScheduledQueue requires that you process Before \r |
33 | and After dependencies. This is done recursively as the call to add\r |
34 | to the mScheduledQueue checks for Before and recursively adds \r |
35 | all Befores. It then addes the item that was passed in and then \r |
36 | processess the After dependecies by recursively calling the routine.\r |
37 | \r |
38 | Dispatcher Rules:\r |
39 | The rules for the dispatcher are in chapter 10 of the DXE CIS. Figure 10-3 \r |
40 | is the state diagram for the DXE dispatcher\r |
41 | \r |
42 | Depex - Dependency Expresion.\r |
43 | SOR - Schedule On Request - Don't schedule if this bit is set.\r |
44 | \r |
45 | --*/\r |
46 | \r |
47 | #include <DxeMain.h>\r |
48 | \r |
49 | //\r |
50 | // The Driver List contains one copy of every driver that has been discovered.\r |
51 | // Items are never removed from the driver list. List of EFI_CORE_DRIVER_ENTRY\r |
52 | //\r |
53 | LIST_ENTRY mDiscoveredList = INITIALIZE_LIST_HEAD_VARIABLE (mDiscoveredList); \r |
54 | \r |
55 | //\r |
56 | // Queue of drivers that are ready to dispatch. This queue is a subset of the\r |
57 | // mDiscoveredList.list of EFI_CORE_DRIVER_ENTRY.\r |
58 | //\r |
59 | LIST_ENTRY mScheduledQueue = INITIALIZE_LIST_HEAD_VARIABLE (mScheduledQueue);\r |
60 | \r |
61 | //\r |
62 | // List of handles who's Fv's have been parsed and added to the mFwDriverList.\r |
63 | //\r |
64 | LIST_ENTRY mFvHandleList = INITIALIZE_LIST_HEAD_VARIABLE (mFvHandleList); // list of KNOWN_HANDLE\r |
65 | \r |
66 | //\r |
67 | // Lock for mDiscoveredList, mScheduledQueue, gDispatcherRunning.\r |
68 | //\r |
69 | EFI_LOCK mDispatcherLock = EFI_INITIALIZE_LOCK_VARIABLE (EFI_TPL_HIGH_LEVEL);\r |
70 | \r |
71 | \r |
72 | //\r |
73 | // Flag for the DXE Dispacher. TRUE if dispatcher is execuing.\r |
74 | //\r |
75 | BOOLEAN gDispatcherRunning = FALSE;\r |
76 | \r |
77 | //\r |
78 | // Module globals to manage the FwVol registration notification event\r |
79 | //\r |
80 | EFI_EVENT mFwVolEvent;\r |
81 | VOID *mFwVolEventRegistration;\r |
82 | \r |
83 | //\r |
84 | // List of file types supported by dispatcher\r |
85 | //\r |
86 | static EFI_FV_FILETYPE mDxeFileTypes[] = { \r |
87 | EFI_FV_FILETYPE_DRIVER, \r |
88 | EFI_FV_FILETYPE_COMBINED_PEIM_DRIVER, \r |
89 | EFI_FV_FILETYPE_DXE_CORE,\r |
90 | EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE\r |
91 | };\r |
92 | \r |
93 | typedef struct {\r |
94 | MEDIA_FW_VOL_FILEPATH_DEVICE_PATH File;\r |
95 | EFI_DEVICE_PATH_PROTOCOL End;\r |
96 | } FV_FILEPATH_DEVICE_PATH;\r |
97 | \r |
98 | FV_FILEPATH_DEVICE_PATH mFvDevicePath;\r |
99 | \r |
100 | \r |
101 | //\r |
102 | // Function Prototypes\r |
103 | //\r |
104 | VOID\r |
105 | CoreInsertOnScheduledQueueWhileProcessingBeforeAndAfter (\r |
106 | IN EFI_CORE_DRIVER_ENTRY *InsertedDriverEntry\r |
107 | );\r |
108 | \r |
109 | VOID\r |
110 | EFIAPI\r |
111 | CoreFwVolEventProtocolNotify (\r |
112 | IN EFI_EVENT Event,\r |
113 | IN VOID *Context\r |
114 | );\r |
115 | \r |
116 | EFI_DEVICE_PATH_PROTOCOL *\r |
117 | CoreFvToDevicePath (\r |
118 | IN EFI_FIRMWARE_VOLUME_PROTOCOL *Fv,\r |
119 | IN EFI_HANDLE FvHandle,\r |
120 | IN EFI_GUID *DriverName\r |
121 | );\r |
122 | \r |
123 | STATIC \r |
124 | EFI_STATUS\r |
125 | CoreAddToDriverList (\r |
126 | IN EFI_FIRMWARE_VOLUME_PROTOCOL *Fv,\r |
127 | IN EFI_HANDLE FvHandle,\r |
128 | IN EFI_GUID *DriverName\r |
129 | );\r |
130 | \r |
131 | STATIC\r |
132 | EFI_STATUS \r |
133 | CoreProcessFvImageFile (\r |
134 | IN EFI_FIRMWARE_VOLUME_PROTOCOL *Fv,\r |
135 | IN EFI_HANDLE FvHandle,\r |
136 | IN EFI_GUID *DriverName\r |
137 | );\r |
138 | \r |
139 | \r |
140 | VOID\r |
141 | CoreAcquireDispatcherLock (\r |
142 | VOID\r |
143 | )\r |
144 | /*++\r |
145 | \r |
146 | Routine Description:\r |
147 | \r |
148 | Enter critical section by gaining lock on mDispatcherLock\r |
149 | \r |
150 | Arguments:\r |
151 | \r |
152 | None\r |
153 | \r |
154 | Returns:\r |
155 | \r |
156 | None\r |
157 | \r |
158 | --*/\r |
159 | \r |
160 | {\r |
161 | CoreAcquireLock (&mDispatcherLock);\r |
162 | }\r |
163 | \r |
164 | VOID\r |
165 | CoreReleaseDispatcherLock (\r |
166 | VOID\r |
167 | )\r |
168 | /*++\r |
169 | \r |
170 | Routine Description:\r |
171 | \r |
172 | Exit critical section by releasing lock on mDispatcherLock\r |
173 | \r |
174 | Arguments:\r |
175 | \r |
176 | None\r |
177 | \r |
178 | Returns:\r |
179 | \r |
180 | None\r |
181 | \r |
182 | --*/\r |
183 | {\r |
184 | CoreReleaseLock (&mDispatcherLock);\r |
185 | }\r |
186 | \r |
187 | \r |
188 | EFI_STATUS\r |
189 | CoreGetDepexSectionAndPreProccess (\r |
190 | IN EFI_CORE_DRIVER_ENTRY *DriverEntry\r |
191 | )\r |
192 | /*++\r |
193 | \r |
194 | Routine Description:\r |
195 | \r |
196 | Read Depex and pre-process the Depex for Before and After. If Section Extraction\r |
197 | protocol returns an error via ReadSection defer the reading of the Depex.\r |
198 | \r |
199 | Arguments:\r |
200 | \r |
201 | DriverEntry - Driver to work on.\r |
202 | \r |
203 | Returns:\r |
204 | \r |
205 | EFI_SUCCESS - Depex read and preprossesed \r |
206 | \r |
207 | EFI_PROTOCOL_ERROR - The section extraction protocol returned an error and \r |
208 | Depex reading needs to be retried.\r |
209 | \r |
210 | Other Error - DEPEX not found.\r |
211 | \r |
212 | --*/\r |
213 | {\r |
214 | EFI_STATUS Status;\r |
215 | EFI_SECTION_TYPE SectionType;\r |
216 | UINT32 AuthenticationStatus;\r |
217 | EFI_FIRMWARE_VOLUME_PROTOCOL *Fv;\r |
218 | \r |
219 | \r |
220 | Fv = DriverEntry->Fv;\r |
221 | \r |
222 | //\r |
223 | // Grab Depex info, it will never be free'ed.\r |
224 | //\r |
225 | SectionType = EFI_SECTION_DXE_DEPEX;\r |
226 | Status = Fv->ReadSection (\r |
227 | DriverEntry->Fv, \r |
228 | &DriverEntry->FileName,\r |
229 | SectionType, \r |
230 | 0, \r |
231 | &DriverEntry->Depex, \r |
232 | (UINTN *)&DriverEntry->DepexSize,\r |
233 | &AuthenticationStatus\r |
234 | );\r |
235 | if (EFI_ERROR (Status)) {\r |
236 | if (Status == EFI_PROTOCOL_ERROR) {\r |
237 | //\r |
238 | // The section extraction protocol failed so set protocol error flag\r |
239 | //\r |
240 | DriverEntry->DepexProtocolError = TRUE;\r |
241 | } else {\r |
242 | //\r |
243 | // If no Depex assume EFI 1.1 driver model\r |
244 | //\r |
245 | DriverEntry->Depex = NULL;\r |
246 | DriverEntry->Dependent = TRUE;\r |
247 | DriverEntry->DepexProtocolError = FALSE;\r |
248 | }\r |
249 | } else {\r |
250 | //\r |
251 | // Set Before, After, and Unrequested state information based on Depex\r |
252 | // Driver will be put in Dependent or Unrequested state\r |
253 | //\r |
254 | CorePreProcessDepex (DriverEntry);\r |
255 | DriverEntry->DepexProtocolError = FALSE;\r |
256 | } \r |
257 | \r |
258 | return Status;\r |
259 | }\r |
260 | \r |
261 | EFI_DXESERVICE\r |
262 | EFI_STATUS\r |
263 | EFIAPI\r |
264 | CoreSchedule (\r |
265 | IN EFI_HANDLE FirmwareVolumeHandle,\r |
266 | IN EFI_GUID *DriverName\r |
267 | )\r |
268 | /*++\r |
269 | \r |
270 | Routine Description:\r |
271 | \r |
272 | Check every driver and locate a matching one. If the driver is found, the Unrequested\r |
273 | state flag is cleared.\r |
274 | \r |
275 | Arguments:\r |
276 | \r |
277 | FirmwareVolumeHandle - The handle of the Firmware Volume that contains the firmware \r |
278 | file specified by DriverName.\r |
279 | \r |
280 | DriverName - The Driver name to put in the Dependent state.\r |
281 | \r |
282 | Returns:\r |
283 | \r |
284 | EFI_SUCCESS - The DriverName was found and it's SOR bit was cleared\r |
285 | \r |
286 | EFI_NOT_FOUND - The DriverName does not exist or it's SOR bit was not set.\r |
287 | \r |
288 | --*/\r |
289 | {\r |
290 | LIST_ENTRY *Link;\r |
291 | EFI_CORE_DRIVER_ENTRY *DriverEntry;\r |
292 | \r |
293 | //\r |
294 | // Check every driver\r |
295 | //\r |
296 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r |
297 | DriverEntry = CR(Link, EFI_CORE_DRIVER_ENTRY, Link, EFI_CORE_DRIVER_ENTRY_SIGNATURE);\r |
298 | if (DriverEntry->FvHandle == FirmwareVolumeHandle &&\r |
299 | DriverEntry->Unrequested && \r |
300 | CompareGuid (DriverName, &DriverEntry->FileName)) {\r |
301 | //\r |
302 | // Move the driver from the Unrequested to the Dependent state\r |
303 | //\r |
304 | CoreAcquireDispatcherLock ();\r |
305 | DriverEntry->Unrequested = FALSE;\r |
306 | DriverEntry->Dependent = TRUE;\r |
307 | CoreReleaseDispatcherLock ();\r |
308 | \r |
309 | return EFI_SUCCESS;\r |
310 | }\r |
311 | }\r |
312 | return EFI_NOT_FOUND; \r |
313 | }\r |
314 | \r |
315 | \r |
316 | EFI_DXESERVICE\r |
317 | EFI_STATUS\r |
318 | EFIAPI\r |
319 | CoreTrust (\r |
320 | IN EFI_HANDLE FirmwareVolumeHandle,\r |
321 | IN EFI_GUID *DriverName\r |
322 | )\r |
323 | /*++\r |
324 | \r |
325 | Routine Description:\r |
326 | \r |
327 | Convert a driver from the Untrused back to the Scheduled state\r |
328 | \r |
329 | Arguments:\r |
330 | \r |
331 | FirmwareVolumeHandle - The handle of the Firmware Volume that contains the firmware \r |
332 | file specified by DriverName.\r |
333 | \r |
334 | DriverName - The Driver name to put in the Scheduled state\r |
335 | \r |
336 | Returns:\r |
337 | \r |
338 | EFI_SUCCESS - The file was found in the untrusted state, and it was promoted \r |
339 | to the trusted state.\r |
340 | \r |
341 | EFI_NOT_FOUND - The file was not found in the untrusted state.\r |
342 | \r |
343 | --*/\r |
344 | {\r |
345 | LIST_ENTRY *Link;\r |
346 | EFI_CORE_DRIVER_ENTRY *DriverEntry;\r |
347 | \r |
348 | //\r |
349 | // Check every driver\r |
350 | //\r |
351 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r |
352 | DriverEntry = CR(Link, EFI_CORE_DRIVER_ENTRY, Link, EFI_CORE_DRIVER_ENTRY_SIGNATURE);\r |
353 | if (DriverEntry->FvHandle == FirmwareVolumeHandle &&\r |
354 | DriverEntry->Untrusted && \r |
355 | CompareGuid (DriverName, &DriverEntry->FileName)) {\r |
356 | //\r |
357 | // Transition driver from Untrusted to Scheduled state.\r |
358 | //\r |
359 | CoreAcquireDispatcherLock ();\r |
360 | DriverEntry->Untrusted = FALSE;\r |
361 | DriverEntry->Scheduled = TRUE;\r |
362 | InsertTailList (&mScheduledQueue, &DriverEntry->ScheduledLink);\r |
363 | CoreReleaseDispatcherLock ();\r |
364 | \r |
365 | return EFI_SUCCESS;\r |
366 | }\r |
367 | }\r |
368 | return EFI_NOT_FOUND; \r |
369 | }\r |
370 | \r |
371 | \r |
372 | EFI_DXESERVICE\r |
373 | EFI_STATUS\r |
374 | EFIAPI\r |
375 | CoreDispatcher (\r |
376 | VOID\r |
377 | )\r |
378 | /*++\r |
379 | \r |
380 | Routine Description:\r |
381 | \r |
382 | This is the main Dispatcher for DXE and it exits when there are no more \r |
383 | drivers to run. Drain the mScheduledQueue and load and start a PE\r |
384 | image for each driver. Search the mDiscoveredList to see if any driver can \r |
385 | be placed on the mScheduledQueue. If no drivers are placed on the\r |
386 | mScheduledQueue exit the function. On exit it is assumed the Bds()\r |
387 | will be called, and when the Bds() exits the Dispatcher will be called \r |
388 | again.\r |
389 | \r |
390 | Arguments:\r |
391 | \r |
392 | NONE\r |
393 | \r |
394 | Returns:\r |
395 | \r |
396 | EFI_ALREADY_STARTED - The DXE Dispatcher is already running\r |
397 | \r |
398 | EFI_NOT_FOUND - No DXE Drivers were dispatched\r |
399 | \r |
400 | EFI_SUCCESS - One or more DXE Drivers were dispatched\r |
401 | \r |
402 | --*/\r |
403 | {\r |
404 | EFI_STATUS Status;\r |
405 | EFI_STATUS ReturnStatus;\r |
406 | LIST_ENTRY *Link;\r |
407 | EFI_CORE_DRIVER_ENTRY *DriverEntry;\r |
408 | BOOLEAN ReadyToRun;\r |
409 | \r |
410 | if (gDispatcherRunning) {\r |
411 | //\r |
412 | // If the dispatcher is running don't let it be restarted.\r |
413 | //\r |
414 | return EFI_ALREADY_STARTED;\r |
415 | }\r |
416 | \r |
417 | gDispatcherRunning = TRUE;\r |
418 | \r |
419 | \r |
420 | ReturnStatus = EFI_NOT_FOUND;\r |
421 | do {\r |
422 | //\r |
423 | // Drain the Scheduled Queue\r |
424 | //\r |
425 | while (!IsListEmpty (&mScheduledQueue)) {\r |
426 | DriverEntry = CR (\r |
427 | mScheduledQueue.ForwardLink,\r |
428 | EFI_CORE_DRIVER_ENTRY,\r |
429 | ScheduledLink,\r |
430 | EFI_CORE_DRIVER_ENTRY_SIGNATURE\r |
431 | );\r |
432 | \r |
433 | //\r |
434 | // Load the DXE Driver image into memory. If the Driver was transitioned from\r |
435 | // Untrused to Scheduled it would have already been loaded so we may need to\r |
436 | // skip the LoadImage\r |
437 | //\r |
438 | if (DriverEntry->ImageHandle == NULL) {\r |
439 | Status = CoreLoadImage (\r |
440 | TRUE, \r |
441 | gDxeCoreImageHandle, \r |
442 | DriverEntry->FvFileDevicePath,\r |
443 | NULL, \r |
444 | 0, \r |
445 | &DriverEntry->ImageHandle\r |
446 | );\r |
447 | \r |
448 | //\r |
449 | // Update the driver state to reflect that it's been loaded\r |
450 | //\r |
451 | if (EFI_ERROR (Status)) {\r |
452 | CoreAcquireDispatcherLock ();\r |
453 | \r |
454 | if (Status == EFI_SECURITY_VIOLATION) {\r |
455 | //\r |
456 | // Take driver from Scheduled to Untrused state\r |
457 | //\r |
458 | DriverEntry->Untrusted = TRUE;\r |
459 | } else {\r |
460 | //\r |
461 | // The DXE Driver could not be loaded, and do not attempt to load or start it again.\r |
462 | // Take driver from Scheduled to Initialized. \r |
463 | //\r |
464 | // This case include the Never Trusted state if EFI_ACCESS_DENIED is returned\r |
465 | //\r |
466 | DriverEntry->Initialized = TRUE;\r |
467 | }\r |
468 | \r |
469 | DriverEntry->Scheduled = FALSE;\r |
470 | RemoveEntryList (&DriverEntry->ScheduledLink);\r |
471 | \r |
472 | CoreReleaseDispatcherLock ();\r |
473 | \r |
474 | //\r |
475 | // If it's an error don't try the StartImage\r |
476 | //\r |
477 | continue;\r |
478 | }\r |
479 | }\r |
480 | \r |
481 | CoreAcquireDispatcherLock ();\r |
482 | \r |
483 | DriverEntry->Scheduled = FALSE;\r |
484 | DriverEntry->Initialized = TRUE;\r |
485 | RemoveEntryList (&DriverEntry->ScheduledLink);\r |
486 | \r |
487 | CoreReleaseDispatcherLock ();\r |
488 | \r |
489 | \r |
490 | CoreReportProgressCodeSpecific (EFI_SOFTWARE_DXE_CORE | EFI_SW_PC_INIT_BEGIN, DriverEntry->ImageHandle);\r |
491 | Status = CoreStartImage (DriverEntry->ImageHandle, NULL, NULL);\r |
492 | CoreReportProgressCodeSpecific (EFI_SOFTWARE_DXE_CORE | EFI_SW_PC_INIT_END, DriverEntry->ImageHandle);\r |
493 | \r |
494 | ReturnStatus = EFI_SUCCESS;\r |
495 | }\r |
496 | \r |
497 | //\r |
498 | // Search DriverList for items to place on Scheduled Queue\r |
499 | //\r |
500 | ReadyToRun = FALSE;\r |
501 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r |
502 | DriverEntry = CR (Link, EFI_CORE_DRIVER_ENTRY, Link, EFI_CORE_DRIVER_ENTRY_SIGNATURE);\r |
503 | \r |
504 | if (DriverEntry->DepexProtocolError){\r |
505 | //\r |
506 | // If Section Extraction Protocol did not let the Depex be read before retry the read\r |
507 | //\r |
508 | Status = CoreGetDepexSectionAndPreProccess (DriverEntry);\r |
509 | } \r |
510 | \r |
511 | if (DriverEntry->Dependent) {\r |
512 | if (CoreIsSchedulable (DriverEntry)) {\r |
513 | CoreInsertOnScheduledQueueWhileProcessingBeforeAndAfter (DriverEntry); \r |
514 | ReadyToRun = TRUE;\r |
515 | } \r |
516 | }\r |
517 | }\r |
518 | } while (ReadyToRun);\r |
519 | \r |
520 | gDispatcherRunning = FALSE;\r |
521 | \r |
522 | return ReturnStatus;\r |
523 | }\r |
524 | \r |
525 | \r |
526 | VOID\r |
527 | CoreInsertOnScheduledQueueWhileProcessingBeforeAndAfter (\r |
528 | IN EFI_CORE_DRIVER_ENTRY *InsertedDriverEntry\r |
529 | )\r |
530 | /*++\r |
531 | \r |
532 | Routine Description:\r |
533 | \r |
534 | Insert InsertedDriverEntry onto the mScheduledQueue. To do this you \r |
535 | must add any driver with a before dependency on InsertedDriverEntry first.\r |
536 | You do this by recursively calling this routine. After all the Befores are\r |
537 | processed you can add InsertedDriverEntry to the mScheduledQueue. \r |
538 | Then you can add any driver with an After dependency on InsertedDriverEntry \r |
539 | by recursively calling this routine.\r |
540 | \r |
541 | Arguments:\r |
542 | \r |
543 | InsertedDriverEntry - The driver to insert on the ScheduledLink Queue\r |
544 | \r |
545 | Returns:\r |
546 | \r |
547 | NONE \r |
548 | \r |
549 | --*/\r |
550 | {\r |
551 | LIST_ENTRY *Link;\r |
552 | EFI_CORE_DRIVER_ENTRY *DriverEntry;\r |
553 | \r |
554 | //\r |
555 | // Process Before Dependency\r |
556 | //\r |
557 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r |
558 | DriverEntry = CR(Link, EFI_CORE_DRIVER_ENTRY, Link, EFI_CORE_DRIVER_ENTRY_SIGNATURE);\r |
559 | if (DriverEntry->Before && DriverEntry->Dependent) {\r |
560 | if (CompareGuid (&InsertedDriverEntry->FileName, &DriverEntry->BeforeAfterGuid)) {\r |
561 | //\r |
562 | // Recursively process BEFORE\r |
563 | //\r |
564 | CoreInsertOnScheduledQueueWhileProcessingBeforeAndAfter (DriverEntry);\r |
565 | }\r |
566 | }\r |
567 | }\r |
568 | \r |
569 | //\r |
570 | // Convert driver from Dependent to Scheduled state\r |
571 | //\r |
572 | CoreAcquireDispatcherLock ();\r |
573 | \r |
574 | InsertedDriverEntry->Dependent = FALSE;\r |
575 | InsertedDriverEntry->Scheduled = TRUE;\r |
576 | InsertTailList (&mScheduledQueue, &InsertedDriverEntry->ScheduledLink);\r |
577 | \r |
578 | CoreReleaseDispatcherLock ();\r |
579 | \r |
580 | //\r |
581 | // Process After Dependency\r |
582 | //\r |
583 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r |
584 | DriverEntry = CR(Link, EFI_CORE_DRIVER_ENTRY, Link, EFI_CORE_DRIVER_ENTRY_SIGNATURE);\r |
585 | if (DriverEntry->After && DriverEntry->Dependent) {\r |
586 | if (CompareGuid (&InsertedDriverEntry->FileName, &DriverEntry->BeforeAfterGuid)) {\r |
587 | //\r |
588 | // Recursively process AFTER\r |
589 | //\r |
590 | CoreInsertOnScheduledQueueWhileProcessingBeforeAndAfter (DriverEntry);\r |
591 | }\r |
592 | }\r |
593 | }\r |
594 | }\r |
595 | \r |
596 | \r |
597 | BOOLEAN\r |
598 | FvHasBeenProcessed (\r |
599 | IN EFI_HANDLE FvHandle\r |
600 | )\r |
601 | /*++\r |
602 | \r |
603 | Routine Description:\r |
604 | \r |
605 | Return TRUE if the Fv has been processed, FALSE if not.\r |
606 | \r |
607 | Arguments:\r |
608 | \r |
609 | FvHandle - The handle of a FV that's being tested\r |
610 | \r |
611 | Returns:\r |
612 | \r |
613 | TRUE - Fv protocol on FvHandle has been processed\r |
614 | \r |
615 | FALSE - Fv protocol on FvHandle has not yet been processed\r |
616 | \r |
617 | --*/\r |
618 | {\r |
619 | LIST_ENTRY *Link;\r |
620 | KNOWN_HANDLE *KnownHandle;\r |
621 | \r |
622 | for (Link = mFvHandleList.ForwardLink; Link != &mFvHandleList; Link = Link->ForwardLink) {\r |
623 | KnownHandle = CR(Link, KNOWN_HANDLE, Link, KNOWN_HANDLE_SIGNATURE);\r |
624 | if (KnownHandle->Handle == FvHandle) {\r |
625 | return TRUE;\r |
626 | }\r |
627 | }\r |
628 | return FALSE;\r |
629 | }\r |
630 | \r |
631 | \r |
632 | VOID\r |
633 | FvIsBeingProcesssed (\r |
634 | IN EFI_HANDLE FvHandle\r |
635 | )\r |
636 | /*++\r |
637 | \r |
638 | Routine Description:\r |
639 | \r |
640 | Remember that Fv protocol on FvHandle has had it's drivers placed on the\r |
641 | mDiscoveredList. This fucntion adds entries on the mFvHandleList. Items are\r |
642 | never removed/freed from the mFvHandleList.\r |
643 | \r |
644 | Arguments:\r |
645 | \r |
646 | FvHandle - The handle of a FV that has been processed\r |
647 | \r |
648 | Returns:\r |
649 | \r |
650 | None\r |
651 | \r |
652 | --*/\r |
653 | {\r |
654 | KNOWN_HANDLE *KnownHandle;\r |
655 | \r |
656 | KnownHandle = CoreAllocateBootServicesPool (sizeof (KNOWN_HANDLE));\r |
657 | ASSERT (KnownHandle != NULL);\r |
658 | \r |
659 | KnownHandle->Signature = KNOWN_HANDLE_SIGNATURE;\r |
660 | KnownHandle->Handle = FvHandle;\r |
661 | InsertTailList (&mFvHandleList, &KnownHandle->Link);\r |
662 | }\r |
663 | \r |
664 | \r |
665 | \r |
666 | \r |
667 | EFI_DEVICE_PATH_PROTOCOL *\r |
668 | CoreFvToDevicePath (\r |
669 | IN EFI_FIRMWARE_VOLUME_PROTOCOL *Fv,\r |
670 | IN EFI_HANDLE FvHandle,\r |
671 | IN EFI_GUID *DriverName\r |
672 | )\r |
673 | /*++\r |
674 | \r |
675 | Routine Description:\r |
676 | \r |
677 | Convert FvHandle and DriverName into an EFI device path\r |
678 | \r |
679 | Arguments:\r |
680 | \r |
681 | Fv - Fv protocol, needed to read Depex info out of FLASH.\r |
682 | \r |
683 | FvHandle - Handle for Fv, needed in the EFI_CORE_DRIVER_ENTRY so that the\r |
684 | PE image can be read out of the FV at a later time.\r |
685 | \r |
686 | DriverName - Name of driver to add to mDiscoveredList.\r |
687 | \r |
688 | Returns:\r |
689 | \r |
690 | Pointer to device path constructed from FvHandle and DriverName\r |
691 | \r |
692 | --*/\r |
693 | {\r |
694 | EFI_STATUS Status;\r |
695 | EFI_DEVICE_PATH_PROTOCOL *FvDevicePath;\r |
696 | EFI_DEVICE_PATH_PROTOCOL *FileNameDevicePath;\r |
697 | \r |
698 | //\r |
699 | // Remember the device path of the FV\r |
700 | //\r |
701 | Status = CoreHandleProtocol (FvHandle, &gEfiDevicePathProtocolGuid, (VOID **)&FvDevicePath);\r |
702 | if (EFI_ERROR (Status)) {\r |
703 | FileNameDevicePath = NULL;\r |
704 | } else {\r |
705 | //\r |
706 | // Build a device path to the file in the FV to pass into gBS->LoadImage\r |
707 | //\r |
708 | EfiInitializeFwVolDevicepathNode (&mFvDevicePath.File, DriverName);\r |
709 | mFvDevicePath.End.Type = EFI_END_ENTIRE_DEVICE_PATH;\r |
710 | mFvDevicePath.End.SubType = END_ENTIRE_DEVICE_PATH_SUBTYPE;\r |
711 | SetDevicePathNodeLength (&mFvDevicePath.End, sizeof (EFI_DEVICE_PATH_PROTOCOL));\r |
712 | \r |
713 | FileNameDevicePath = CoreAppendDevicePath (\r |
714 | FvDevicePath, \r |
715 | (EFI_DEVICE_PATH_PROTOCOL *)&mFvDevicePath\r |
716 | );\r |
717 | }\r |
718 | \r |
719 | return FileNameDevicePath;\r |
720 | }\r |
721 | \r |
722 | \r |
723 | \r |
724 | EFI_STATUS\r |
725 | CoreAddToDriverList (\r |
726 | IN EFI_FIRMWARE_VOLUME_PROTOCOL *Fv,\r |
727 | IN EFI_HANDLE FvHandle,\r |
728 | IN EFI_GUID *DriverName\r |
729 | )\r |
730 | /*++\r |
731 | \r |
732 | Routine Description:\r |
733 | \r |
734 | Add an entry to the mDiscoveredList. Allocate memory to store the DriverEntry, \r |
735 | and initilize any state variables. Read the Depex from the FV and store it\r |
736 | in DriverEntry. Pre-process the Depex to set the SOR, Before and After state.\r |
737 | The Discovered list is never free'ed and contains booleans that represent the\r |
738 | other possible DXE driver states.\r |
739 | \r |
740 | Arguments:\r |
741 | \r |
742 | Fv - Fv protocol, needed to read Depex info out of FLASH.\r |
743 | \r |
744 | FvHandle - Handle for Fv, needed in the EFI_CORE_DRIVER_ENTRY so that the\r |
745 | PE image can be read out of the FV at a later time.\r |
746 | \r |
747 | DriverName - Name of driver to add to mDiscoveredList.\r |
748 | \r |
749 | Returns:\r |
750 | \r |
751 | EFI_SUCCESS - If driver was added to the mDiscoveredList.\r |
752 | \r |
753 | EFI_ALREADY_STARTED - The driver has already been started. Only one DriverName\r |
754 | may be active in the system at any one time.\r |
755 | \r |
756 | --*/\r |
757 | {\r |
758 | EFI_CORE_DRIVER_ENTRY *DriverEntry;\r |
759 | \r |
760 | \r |
761 | //\r |
762 | // Create the Driver Entry for the list. ZeroPool initializes lots of variables to \r |
763 | // NULL or FALSE.\r |
764 | //\r |
765 | DriverEntry = CoreAllocateZeroBootServicesPool (sizeof (EFI_CORE_DRIVER_ENTRY));\r |
766 | ASSERT (DriverEntry != NULL);\r |
767 | \r |
768 | DriverEntry->Signature = EFI_CORE_DRIVER_ENTRY_SIGNATURE;\r |
769 | CopyMem (&DriverEntry->FileName, DriverName, sizeof (EFI_GUID));\r |
770 | DriverEntry->FvHandle = FvHandle;\r |
771 | DriverEntry->Fv = Fv;\r |
772 | DriverEntry->FvFileDevicePath = CoreFvToDevicePath (Fv, FvHandle, DriverName);\r |
773 | \r |
774 | CoreGetDepexSectionAndPreProccess (DriverEntry);\r |
775 | \r |
776 | CoreAcquireDispatcherLock ();\r |
777 | \r |
778 | InsertTailList (&mDiscoveredList, &DriverEntry->Link);\r |
779 | \r |
780 | CoreReleaseDispatcherLock ();\r |
781 | \r |
782 | return EFI_SUCCESS;\r |
783 | }\r |
784 | \r |
785 | \r |
786 | \r |
787 | EFI_STATUS \r |
788 | CoreProcessFvImageFile (\r |
789 | IN EFI_FIRMWARE_VOLUME_PROTOCOL *Fv,\r |
790 | IN EFI_HANDLE FvHandle,\r |
791 | IN EFI_GUID *DriverName\r |
792 | )\r |
793 | /*++\r |
794 | \r |
795 | Routine Description:\r |
796 | \r |
797 | Get the driver from the FV through driver name, and produce a FVB protocol on FvHandle.\r |
798 | \r |
799 | Arguments:\r |
800 | \r |
801 | Fv - The FIRMWARE_VOLUME protocol installed on the FV.\r |
802 | FvHandle - The handle which FVB protocol installed on.\r |
803 | DriverName - The driver guid specified.\r |
804 | \r |
805 | Returns:\r |
806 | \r |
807 | EFI_OUT_OF_RESOURCES - No enough memory or other resource.\r |
808 | \r |
809 | EFI_VOLUME_CORRUPTED - Corrupted volume.\r |
810 | \r |
811 | EFI_SUCCESS - Function successfully returned.\r |
812 | \r |
813 | \r |
814 | --*/\r |
815 | {\r |
816 | EFI_STATUS Status;\r |
817 | EFI_SECTION_TYPE SectionType;\r |
818 | UINT32 AuthenticationStatus;\r |
819 | VOID *Buffer;\r |
820 | UINTN BufferSize;\r |
821 | \r |
822 | //\r |
823 | // Read the first (and only the first) firmware volume section\r |
824 | //\r |
825 | SectionType = EFI_SECTION_FIRMWARE_VOLUME_IMAGE;\r |
826 | Buffer = NULL;\r |
827 | BufferSize = 0;\r |
828 | Status = Fv->ReadSection (\r |
829 | Fv, \r |
830 | DriverName, \r |
831 | SectionType, \r |
832 | 0, \r |
833 | &Buffer, \r |
834 | &BufferSize,\r |
835 | &AuthenticationStatus\r |
836 | );\r |
837 | if (!EFI_ERROR (Status)) {\r |
838 | //\r |
839 | // Produce a FVB protocol for the file\r |
840 | //\r |
841 | Status = ProduceFVBProtocolOnBuffer (\r |
842 | (EFI_PHYSICAL_ADDRESS) (UINTN) Buffer,\r |
843 | (UINT64)BufferSize,\r |
844 | FvHandle,\r |
845 | NULL\r |
846 | );\r |
847 | }\r |
848 | \r |
849 | if (EFI_ERROR (Status) && (Buffer != NULL)) { \r |
850 | //\r |
851 | // ReadSection or Produce FVB failed, Free data buffer\r |
852 | //\r |
853 | CoreFreePool (Buffer); \r |
854 | \r |
855 | }\r |
856 | \r |
857 | return Status;\r |
858 | }\r |
859 | \r |
860 | \r |
861 | VOID\r |
862 | EFIAPI\r |
863 | CoreFwVolEventProtocolNotify (\r |
864 | IN EFI_EVENT Event,\r |
865 | IN VOID *Context\r |
866 | )\r |
867 | /*++\r |
868 | \r |
869 | Routine Description:\r |
870 | \r |
871 | Event notification that is fired every time a FV dispatch protocol is added. \r |
872 | More than one protocol may have been added when this event is fired, so you\r |
873 | must loop on CoreLocateHandle () to see how many protocols were added and\r |
874 | do the following to each FV:\r |
875 | \r |
876 | If the Fv has already been processed, skip it. If the Fv has not been \r |
877 | processed then mark it as being processed, as we are about to process it.\r |
878 | \r |
879 | Read the Fv and add any driver in the Fv to the mDiscoveredList.The \r |
880 | mDiscoveredList is never free'ed and contains variables that define\r |
881 | the other states the DXE driver transitions to.. \r |
882 | \r |
883 | While you are at it read the A Priori file into memory.\r |
884 | Place drivers in the A Priori list onto the mScheduledQueue.\r |
885 | \r |
886 | Arguments:\r |
887 | \r |
888 | Event - The Event that is being processed, not used.\r |
889 | \r |
890 | Context - Event Context, not used.\r |
891 | \r |
892 | Returns:\r |
893 | \r |
894 | None\r |
895 | \r |
896 | --*/\r |
897 | {\r |
898 | EFI_STATUS Status;\r |
899 | EFI_STATUS GetNextFileStatus;\r |
900 | EFI_STATUS SecurityStatus;\r |
901 | EFI_FIRMWARE_VOLUME_PROTOCOL *Fv;\r |
902 | EFI_DEVICE_PATH_PROTOCOL *FvDevicePath;\r |
903 | EFI_HANDLE FvHandle;\r |
904 | UINTN BufferSize;\r |
905 | EFI_GUID NameGuid;\r |
906 | UINTN Key;\r |
907 | EFI_FV_FILETYPE Type;\r |
908 | EFI_FV_FILE_ATTRIBUTES Attributes;\r |
909 | UINTN Size;\r |
910 | EFI_CORE_DRIVER_ENTRY *DriverEntry;\r |
911 | EFI_GUID *AprioriFile;\r |
912 | UINTN AprioriEntryCount;\r |
913 | UINTN Index;\r |
914 | LIST_ENTRY *Link;\r |
915 | UINT32 AuthenticationStatus;\r |
916 | UINTN SizeOfBuffer;\r |
917 | \r |
918 | \r |
919 | while (TRUE) {\r |
920 | BufferSize = sizeof (EFI_HANDLE);\r |
921 | Status = CoreLocateHandle (\r |
922 | ByRegisterNotify,\r |
923 | NULL,\r |
924 | mFwVolEventRegistration,\r |
925 | &BufferSize,\r |
926 | &FvHandle\r |
927 | );\r |
928 | if (EFI_ERROR (Status)) {\r |
929 | //\r |
930 | // If no more notification events exit\r |
931 | //\r |
932 | return;\r |
933 | }\r |
934 | \r |
935 | if (FvHasBeenProcessed (FvHandle)) {\r |
936 | //\r |
937 | // This Fv has already been processed so lets skip it!\r |
938 | //\r |
939 | continue;\r |
940 | }\r |
941 | \r |
942 | Status = CoreHandleProtocol (FvHandle, &gEfiFirmwareVolumeDispatchProtocolGuid, (VOID **)&Fv);\r |
943 | if (EFI_ERROR (Status)) {\r |
944 | //\r |
945 | // If no dispatch protocol then skip, but do not marked as being processed as it\r |
946 | // may show up later.\r |
947 | //\r |
948 | continue;\r |
949 | }\r |
950 | \r |
951 | //\r |
952 | // Since we are about to process this Fv mark it as processed.\r |
953 | //\r |
954 | FvIsBeingProcesssed (FvHandle);\r |
955 | \r |
956 | \r |
957 | Status = CoreHandleProtocol (FvHandle, &gEfiFirmwareVolumeProtocolGuid, (VOID **)&Fv);\r |
958 | if (EFI_ERROR (Status)) {\r |
959 | //\r |
960 | // The Handle has a FirmwareVolumeDispatch protocol and should also contiain\r |
961 | // a FirmwareVolume protocol thus we should never get here.\r |
962 | //\r |
963 | ASSERT (FALSE);\r |
964 | continue;\r |
965 | }\r |
966 | \r |
967 | Status = CoreHandleProtocol (FvHandle, &gEfiDevicePathProtocolGuid, (VOID **)&FvDevicePath);\r |
968 | if (EFI_ERROR (Status)) {\r |
969 | //\r |
970 | // The Firmware volume doesn't have device path, can't be dispatched.\r |
971 | //\r |
972 | continue;\r |
973 | }\r |
974 | \r |
975 | //\r |
976 | // Evaluate the authentication status of the Firmware Volume through \r |
977 | // Security Architectural Protocol\r |
978 | //\r |
979 | if (gSecurity != NULL) {\r |
980 | SecurityStatus = gSecurity->FileAuthenticationState (\r |
981 | gSecurity, \r |
982 | 0, \r |
983 | FvDevicePath\r |
984 | );\r |
985 | if (SecurityStatus != EFI_SUCCESS) {\r |
986 | //\r |
987 | // Security check failed. The firmware volume should not be used for any purpose.\r |
988 | //\r |
989 | continue;\r |
990 | }\r |
991 | } \r |
992 | \r |
993 | //\r |
994 | // Discover Drivers in FV and add them to the Discovered Driver List. \r |
995 | // Process EFI_FV_FILETYPE_DRIVER type and then EFI_FV_FILETYPE_COMBINED_PEIM_DRIVER \r |
996 | // EFI_FV_FILETYPE_DXE_CORE is processed to produce a Loaded Image protocol for the core\r |
997 | // EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE is processed to create a Fvb\r |
998 | //\r |
999 | for (Index = 0; Index < sizeof (mDxeFileTypes)/sizeof (EFI_FV_FILETYPE); Index++) {\r |
1000 | //\r |
1001 | // Initialize the search key\r |
1002 | //\r |
1003 | Key = 0;\r |
1004 | do {\r |
1005 | Type = mDxeFileTypes[Index];\r |
1006 | GetNextFileStatus = Fv->GetNextFile (\r |
1007 | Fv, \r |
1008 | &Key,\r |
1009 | &Type, \r |
1010 | &NameGuid, \r |
1011 | &Attributes, \r |
1012 | &Size\r |
1013 | );\r |
1014 | if (!EFI_ERROR (GetNextFileStatus)) {\r |
1015 | if (Type == EFI_FV_FILETYPE_DXE_CORE) {\r |
1016 | //\r |
1017 | // If this is the DXE core fill in it's DevicePath & DeviceHandle\r |
1018 | //\r |
1019 | if (gDxeCoreLoadedImage->FilePath == NULL) {\r |
1020 | if (CompareGuid (&NameGuid, gDxeCoreFileName)) {\r |
1021 | CopyGuid (&mFvDevicePath.File.NameGuid, &NameGuid);\r |
1022 | \r |
1023 | gDxeCoreLoadedImage->FilePath = CoreDuplicateDevicePath (\r |
1024 | (EFI_DEVICE_PATH_PROTOCOL *)&mFvDevicePath\r |
1025 | );\r |
1026 | gDxeCoreLoadedImage->DeviceHandle = FvHandle;\r |
1027 | }\r |
1028 | }\r |
1029 | } else if (Type == EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE) {\r |
1030 | //\r |
1031 | // Found a firmware volume image. Produce a firmware volume block\r |
1032 | // protocol for it so it gets dispatched from. This is usually a \r |
1033 | // capsule.\r |
1034 | //\r |
1035 | CoreProcessFvImageFile (Fv, FvHandle, &NameGuid);\r |
1036 | } else {\r |
1037 | //\r |
1038 | // Transition driver from Undiscovered to Discovered state\r |
1039 | //\r |
1040 | CoreAddToDriverList (Fv, FvHandle, &NameGuid);\r |
1041 | }\r |
1042 | }\r |
1043 | } while (!EFI_ERROR (GetNextFileStatus));\r |
1044 | }\r |
1045 | \r |
1046 | //\r |
1047 | // Read the array of GUIDs from the Apriori file if it is present in the firmware volume\r |
1048 | //\r |
1049 | AprioriFile = NULL;\r |
1050 | Status = Fv->ReadSection (\r |
1051 | Fv,\r |
1052 | &gAprioriGuid,\r |
1053 | EFI_SECTION_RAW,\r |
1054 | 0,\r |
1055 | (VOID **)&AprioriFile,\r |
1056 | &SizeOfBuffer,\r |
1057 | &AuthenticationStatus\r |
1058 | );\r |
1059 | if (!EFI_ERROR (Status)) {\r |
1060 | AprioriEntryCount = SizeOfBuffer / sizeof (EFI_GUID);\r |
1061 | } else {\r |
1062 | AprioriEntryCount = 0;\r |
1063 | }\r |
1064 | \r |
1065 | //\r |
1066 | // Put drivers on Apriori List on the Scheduled queue. The Discovered List includes\r |
1067 | // drivers not in the current FV and these must be skipped since the a priori list\r |
1068 | // is only valid for the FV that it resided in.\r |
1069 | //\r |
1070 | CoreAcquireDispatcherLock ();\r |
1071 | \r |
1072 | for (Index = 0; Index < AprioriEntryCount; Index++) {\r |
1073 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r |
1074 | DriverEntry = CR(Link, EFI_CORE_DRIVER_ENTRY, Link, EFI_CORE_DRIVER_ENTRY_SIGNATURE);\r |
1075 | if (CompareGuid (&DriverEntry->FileName, &AprioriFile[Index]) &&\r |
1076 | (FvHandle == DriverEntry->FvHandle)) {\r |
1077 | DriverEntry->Dependent = FALSE;\r |
1078 | DriverEntry->Scheduled = TRUE;\r |
1079 | InsertTailList (&mScheduledQueue, &DriverEntry->ScheduledLink);\r |
1080 | break;\r |
1081 | }\r |
1082 | }\r |
1083 | }\r |
1084 | \r |
1085 | CoreReleaseDispatcherLock ();\r |
1086 | \r |
1087 | //\r |
1088 | // Free data allocated by Fv->ReadSection () \r |
1089 | //\r |
1090 | CoreFreePool (AprioriFile); \r |
1091 | }\r |
1092 | }\r |
1093 | \r |
1094 | \r |
1095 | VOID\r |
1096 | CoreInitializeDispatcher (\r |
1097 | VOID\r |
1098 | )\r |
1099 | /*++\r |
1100 | \r |
1101 | Routine Description:\r |
1102 | \r |
1103 | Initialize the dispatcher. Initialize the notification function that runs when\r |
1104 | a FV protocol is added to the system.\r |
1105 | \r |
1106 | Arguments:\r |
1107 | \r |
1108 | NONE\r |
1109 | \r |
1110 | Returns:\r |
1111 | \r |
1112 | NONE \r |
1113 | \r |
1114 | --*/\r |
1115 | {\r |
1116 | mFwVolEvent = CoreCreateProtocolNotifyEvent (\r |
1117 | &gEfiFirmwareVolumeProtocolGuid, \r |
1118 | EFI_TPL_CALLBACK,\r |
1119 | CoreFwVolEventProtocolNotify,\r |
1120 | NULL,\r |
1121 | &mFwVolEventRegistration,\r |
1122 | TRUE\r |
1123 | );\r |
1124 | }\r |
1125 | \r |
1126 | //\r |
1127 | // Function only used in debug buils\r |
1128 | //\r |
1129 | VOID\r |
1130 | CoreDisplayDiscoveredNotDispatched (\r |
1131 | VOID\r |
1132 | )\r |
1133 | /*++\r |
1134 | \r |
1135 | Routine Description:\r |
1136 | \r |
1137 | Traverse the discovered list for any drivers that were discovered but not loaded \r |
1138 | because the dependency experessions evaluated to false\r |
1139 | \r |
1140 | Arguments:\r |
1141 | \r |
1142 | NONE\r |
1143 | \r |
1144 | Returns:\r |
1145 | \r |
1146 | NONE \r |
1147 | \r |
1148 | --*/\r |
1149 | {\r |
1150 | LIST_ENTRY *Link;\r |
1151 | EFI_CORE_DRIVER_ENTRY *DriverEntry;\r |
1152 | \r |
1153 | for (Link = mDiscoveredList.ForwardLink;Link !=&mDiscoveredList; Link = Link->ForwardLink) {\r |
1154 | DriverEntry = CR(Link, EFI_CORE_DRIVER_ENTRY, Link, EFI_CORE_DRIVER_ENTRY_SIGNATURE);\r |
1155 | if (DriverEntry->Dependent) {\r |
1156 | DEBUG ((EFI_D_LOAD, "Driver %g was discovered but not loaded!!\n", &DriverEntry->FileName));\r |
1157 | }\r |
1158 | }\r |
1159 | }\r |