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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 | EFI PEI Core dispatch services\r | |
19 | \r | |
20 | Revision History\r | |
21 | \r | |
22 | --*/\r | |
23 | \r | |
24 | #include <PeiMain.h>\r | |
25 | \r | |
26 | VOID *\r | |
27 | TransferOldDataToNewDataRange (\r | |
28 | IN PEI_CORE_INSTANCE *PrivateData\r | |
29 | );\r | |
30 | \r | |
31 | EFI_GUID gEfiPeiCorePrivateGuid = EFI_PEI_CORE_PRIVATE_GUID;\r | |
32 | \r | |
33 | \r | |
34 | EFI_STATUS\r | |
35 | PeiDispatcher (\r | |
36 | IN EFI_PEI_STARTUP_DESCRIPTOR *PeiStartupDescriptor,\r | |
37 | IN PEI_CORE_INSTANCE *PrivateData,\r | |
38 | IN PEI_CORE_DISPATCH_DATA *DispatchData\r | |
39 | )\r | |
40 | \r | |
41 | /*++\r | |
42 | \r | |
43 | Routine Description:\r | |
44 | \r | |
45 | Conduct PEIM dispatch.\r | |
46 | \r | |
47 | Arguments:\r | |
48 | \r | |
49 | PeiStartupDescriptor - Pointer to IN EFI_PEI_STARTUP_DESCRIPTOR\r | |
50 | PrivateData - Pointer to the private data passed in from caller\r | |
51 | DispatchData - Pointer to PEI_CORE_DISPATCH_DATA data.\r | |
52 | \r | |
53 | Returns:\r | |
54 | \r | |
55 | EFI_SUCCESS - Successfully dispatched PEIM.\r | |
56 | EFI_NOT_FOUND - The dispatch failed.\r | |
57 | \r | |
58 | --*/\r | |
59 | {\r | |
60 | EFI_STATUS Status;\r | |
61 | PEI_CORE_TEMP_POINTERS TempPtr;\r | |
62 | UINTN PrivateDataInMem;\r | |
63 | BOOLEAN NextFvFound;\r | |
64 | EFI_FIRMWARE_VOLUME_HEADER *NextFvAddress;\r | |
65 | EFI_FIRMWARE_VOLUME_HEADER *DefaultFvAddress;\r | |
62332e5d | 66 | VOID *TopOfStack;\r |
878ddf1f | 67 | //\r |
68 | // Debug data for uninstalled Peim list\r | |
69 | //\r | |
70 | EFI_GUID DebugFoundPeimList[32];\r | |
71 | REPORT_STATUS_CODE_LIBRARY_DEVICE_HANDLE_EXTENDED_DATA ExtendedData;\r | |
72 | \r | |
73 | //\r | |
74 | // save the Current FV Address so that we will not process it again if FindFv returns it later\r | |
75 | //\r | |
76 | DefaultFvAddress = DispatchData->BootFvAddress;\r | |
77 | \r | |
78 | //\r | |
79 | // This is the main dispatch loop. It will search known FVs for PEIMs and\r | |
80 | // attempt to dispatch them. If any PEIM gets dispatched through a single\r | |
81 | // pass of the dispatcher, it will start over from the Bfv again to see\r | |
82 | // if any new PEIMs dependencies got satisfied. With a well ordered\r | |
83 | // FV where PEIMs are found in the order their dependencies are also\r | |
84 | // satisfied, this dipatcher should run only once.\r | |
85 | //\r | |
86 | for (;;) {\r | |
87 | //\r | |
88 | // This is the PEIM search loop. It will scan through all PEIMs it can find\r | |
89 | // looking for PEIMs to dispatch, and will dipatch them if they have not\r | |
90 | // already been dispatched and all of their dependencies are met.\r | |
91 | // If no more PEIMs can be found in this pass through all known FVs,\r | |
92 | // then it will break out of this loop.\r | |
93 | //\r | |
94 | for (;;) {\r | |
95 | \r | |
96 | Status = FindNextPeim (\r | |
97 | &PrivateData->PS,\r | |
98 | DispatchData->CurrentFvAddress,\r | |
99 | &DispatchData->CurrentPeimAddress\r | |
100 | );\r | |
101 | \r | |
102 | //\r | |
103 | // If we found a PEIM, check if it is dispatched. If so, go to the\r | |
104 | // next PEIM. If not, dispatch it if its dependencies are satisfied.\r | |
105 | // If its dependencies are not satisfied, go to the next PEIM.\r | |
106 | //\r | |
107 | if (Status == EFI_SUCCESS) {\r | |
108 | \r | |
2ce31132 | 109 | DEBUG_CODE_BEGIN ();\r |
878ddf1f | 110 | \r |
111 | //\r | |
112 | // Fill list of found Peims for later list of those not installed\r | |
113 | //\r | |
114 | CopyMem (\r | |
115 | &DebugFoundPeimList[DispatchData->CurrentPeim],\r | |
116 | &DispatchData->CurrentPeimAddress->Name,\r | |
117 | sizeof (EFI_GUID)\r | |
118 | );\r | |
119 | \r | |
2ce31132 | 120 | DEBUG_CODE_END ();\r |
878ddf1f | 121 | \r |
122 | if (!Dispatched (\r | |
123 | DispatchData->CurrentPeim,\r | |
124 | DispatchData->DispatchedPeimBitMap\r | |
125 | )) {\r | |
126 | if (DepexSatisfied (&PrivateData->PS, DispatchData->CurrentPeimAddress)) {\r | |
127 | Status = PeiLoadImage (\r | |
128 | &PrivateData->PS,\r | |
129 | DispatchData->CurrentPeimAddress,\r | |
130 | &TempPtr.Raw\r | |
131 | );\r | |
132 | if (Status == EFI_SUCCESS) {\r | |
133 | \r | |
134 | //\r | |
135 | // The PEIM has its dependencies satisfied, and its entry point\r | |
136 | // has been found, so invoke it.\r | |
137 | //\r | |
138 | PERF_START (\r | |
139 | (VOID *) (UINTN) (DispatchData->CurrentPeimAddress),\r | |
140 | "PEIM",\r | |
141 | NULL,\r | |
142 | 0\r | |
143 | );\r | |
144 | \r | |
145 | //\r | |
146 | // BUGBUG: Used to be EFI_PEI_REPORT_STATUS_CODE_CODE\r | |
147 | //\r | |
148 | ExtendedData.Handle = (EFI_HANDLE)DispatchData->CurrentPeimAddress;\r | |
149 | \r | |
150 | REPORT_STATUS_CODE_WITH_EXTENDED_DATA (\r | |
151 | EFI_PROGRESS_CODE,\r | |
152 | EFI_SOFTWARE_PEI_CORE | EFI_SW_PC_INIT_BEGIN,\r | |
153 | (VOID *)(&ExtendedData),\r | |
154 | sizeof (ExtendedData)\r | |
155 | );\r | |
156 | \r | |
157 | //\r | |
158 | // Is this a authentic image\r | |
159 | //\r | |
160 | Status = VerifyPeim (\r | |
161 | &PrivateData->PS,\r | |
162 | DispatchData->CurrentPeimAddress\r | |
163 | );\r | |
164 | \r | |
165 | if (Status != EFI_SECURITY_VIOLATION) {\r | |
166 | \r | |
167 | Status = TempPtr.PeimEntry (\r | |
168 | DispatchData->CurrentPeimAddress,\r | |
169 | &PrivateData->PS\r | |
170 | );\r | |
171 | }\r | |
172 | \r | |
173 | REPORT_STATUS_CODE_WITH_EXTENDED_DATA (\r | |
174 | EFI_PROGRESS_CODE,\r | |
175 | EFI_SOFTWARE_PEI_CORE | EFI_SW_PC_INIT_END,\r | |
176 | (VOID *)(&ExtendedData),\r | |
177 | sizeof (ExtendedData)\r | |
178 | );\r | |
179 | \r | |
180 | PERF_END ((VOID *) (UINTN) (DispatchData->CurrentPeimAddress), "PEIM", NULL, 0);\r | |
181 | \r | |
182 | //\r | |
183 | // Mark the PEIM as dispatched so we don't attempt to run it again\r | |
184 | //\r | |
185 | SetDispatched (\r | |
186 | &PrivateData->PS,\r | |
187 | DispatchData->CurrentPeim,\r | |
188 | &DispatchData->DispatchedPeimBitMap\r | |
189 | );\r | |
190 | \r | |
191 | //\r | |
192 | // Process the Notify list and dispatch any notifies for\r | |
193 | // newly installed PPIs.\r | |
194 | //\r | |
195 | ProcessNotifyList (&PrivateData->PS);\r | |
196 | \r | |
197 | //\r | |
198 | // If real system memory was discovered and installed by this\r | |
199 | // PEIM, switch the stacks to the new memory. Since we are\r | |
200 | // at dispatch level, only the Core's private data is preserved,\r | |
201 | // nobody else should have any data on the stack.\r | |
202 | //\r | |
203 | if (PrivateData->SwitchStackSignal) {\r | |
204 | TempPtr.PeiCore = (PEI_CORE_ENTRY_POINT)PeiCore;\r | |
205 | PrivateDataInMem = (UINTN) TransferOldDataToNewDataRange (PrivateData);\r | |
206 | ASSERT (PrivateDataInMem != 0);\r | |
207 | //\r | |
62332e5d | 208 | // Adjust the top of stack to be aligned at CPU_STACK_ALIGNMENT\r |
878ddf1f | 209 | //\r |
62332e5d | 210 | TopOfStack = (VOID *)((UINTN)PrivateData->StackBase + (UINTN)PrivateData->StackSize - CPU_STACK_ALIGNMENT);\r |
211 | TopOfStack = ALIGN_POINTER (TopOfStack, CPU_STACK_ALIGNMENT);\r | |
212 | \r | |
eeb1cd5a | 213 | PeiSwitchStacks (\r |
878ddf1f | 214 | (SWITCH_STACK_ENTRY_POINT)(UINTN)TempPtr.Raw,\r |
215 | PeiStartupDescriptor,\r | |
216 | (VOID*)PrivateDataInMem,\r | |
62332e5d | 217 | TopOfStack,\r |
eeb1cd5a | 218 | (VOID*)(UINTN)PrivateData->StackBase\r |
219 | );\r | |
878ddf1f | 220 | }\r |
221 | }\r | |
222 | }\r | |
223 | }\r | |
224 | DispatchData->CurrentPeim++;\r | |
225 | continue;\r | |
226 | \r | |
227 | } else {\r | |
228 | \r | |
229 | //\r | |
230 | // If we could not find another PEIM in the current FV, go try\r | |
231 | // the FindFv PPI to look in other FVs for more PEIMs. If we can\r | |
232 | // not locate the FindFv PPI, or if the FindFv PPI can not find\r | |
233 | // anymore FVs, then exit the PEIM search loop.\r | |
234 | //\r | |
235 | if (DispatchData->FindFv == NULL) {\r | |
84a99d48 | 236 | Status = PeiServicesLocatePpi (\r |
878ddf1f | 237 | &gEfiFindFvPpiGuid,\r |
238 | 0,\r | |
239 | NULL,\r | |
240 | (VOID **)&DispatchData->FindFv\r | |
241 | );\r | |
242 | if (Status != EFI_SUCCESS) {\r | |
243 | break;\r | |
244 | }\r | |
245 | }\r | |
246 | NextFvFound = FALSE;\r | |
247 | while (!NextFvFound) {\r | |
248 | Status = DispatchData->FindFv->FindFv (\r | |
249 | DispatchData->FindFv,\r | |
250 | &PrivateData->PS,\r | |
251 | &DispatchData->CurrentFv,\r | |
252 | &NextFvAddress\r | |
253 | );\r | |
254 | //\r | |
255 | // if there is no next fv, get out of this loop of finding FVs\r | |
256 | //\r | |
257 | if (Status != EFI_SUCCESS) {\r | |
258 | break;\r | |
259 | }\r | |
260 | //\r | |
261 | // don't process the default Fv again. (we don't know the order in which the hobs were created)\r | |
262 | //\r | |
263 | if ((NextFvAddress != DefaultFvAddress) &&\r | |
264 | (NextFvAddress != DispatchData->CurrentFvAddress)) {\r | |
265 | \r | |
266 | //\r | |
267 | // VerifyFv() is currently returns SUCCESS all the time, add code to it to\r | |
268 | // actually verify the given FV\r | |
269 | //\r | |
270 | Status = VerifyFv (NextFvAddress);\r | |
271 | if (Status == EFI_SUCCESS) {\r | |
272 | NextFvFound = TRUE;\r | |
273 | DispatchData->CurrentFvAddress = NextFvAddress;\r | |
274 | DispatchData->CurrentPeimAddress = NULL;\r | |
275 | //\r | |
276 | // current PRIM number (CurrentPeim) must continue as is, don't reset it here\r | |
277 | //\r | |
278 | }\r | |
279 | }\r | |
280 | }\r | |
281 | //\r | |
282 | // if there is no next fv, get out of this loop of dispatching PEIMs\r | |
283 | //\r | |
284 | if (!NextFvFound) {\r | |
285 | break;\r | |
286 | }\r | |
287 | //\r | |
288 | // continue in the inner for(;;) loop with a new FV;\r | |
289 | //\r | |
290 | }\r | |
291 | }\r | |
292 | \r | |
293 | //\r | |
294 | // If all the PEIMs that we have found have been dispatched, then\r | |
295 | // there is nothing left to dispatch and we don't need to go search\r | |
296 | // through all PEIMs again.\r | |
297 | //\r | |
298 | if ((~(DispatchData->DispatchedPeimBitMap) &\r | |
299 | ((1 << DispatchData->CurrentPeim)-1)) == 0) {\r | |
300 | break;\r | |
301 | }\r | |
302 | \r | |
303 | //\r | |
304 | // Check if no more PEIMs that depex was satisfied\r | |
305 | //\r | |
306 | if (DispatchData->DispatchedPeimBitMap == DispatchData->PreviousPeimBitMap) {\r | |
307 | break;\r | |
308 | }\r | |
309 | \r | |
310 | //\r | |
311 | // Case when Depex is not satisfied and has to traverse the list again\r | |
312 | //\r | |
313 | DispatchData->CurrentPeim = 0;\r | |
314 | DispatchData->CurrentPeimAddress = 0;\r | |
315 | DispatchData->PreviousPeimBitMap = DispatchData->DispatchedPeimBitMap;\r | |
316 | \r | |
317 | //\r | |
318 | // don't go back to the loop without making sure that the CurrentFvAddress is the\r | |
319 | // same as the 1st (or default) FV we started with. otherwise we will interpret the bimap wrongly and\r | |
320 | // mess it up, always start processing the PEIMs from the default FV just like in the first time around.\r | |
321 | //\r | |
322 | DispatchData->CurrentFv = 0;\r | |
323 | DispatchData->CurrentFvAddress = DefaultFvAddress;\r | |
324 | }\r | |
325 | \r | |
2ce31132 | 326 | DEBUG_CODE_BEGIN ();\r |
878ddf1f | 327 | //\r |
328 | // Debug data for uninstalled Peim list\r | |
329 | //\r | |
330 | UINT32 DebugNotDispatchedBitmap;\r | |
331 | UINT8 DebugFoundPeimPoint;\r | |
332 | \r | |
333 | DebugFoundPeimPoint = 0;\r | |
334 | //\r | |
335 | // Get bitmap of Peims that were not dispatched,\r | |
336 | //\r | |
337 | \r | |
338 | DebugNotDispatchedBitmap = ((DispatchData->DispatchedPeimBitMap) ^ ((1 << DispatchData->CurrentPeim)-1));\r | |
339 | //\r | |
340 | // Scan bitmap of Peims not installed and print GUIDS\r | |
341 | //\r | |
342 | while (DebugNotDispatchedBitmap != 0) {\r | |
343 | if ((DebugNotDispatchedBitmap & 1) != 0) {\r | |
344 | DEBUG ((EFI_D_INFO, "WARNING -> InstallPpi: Not Installed: %g\n",\r | |
345 | &DebugFoundPeimList[DebugFoundPeimPoint]\r | |
346 | ));\r | |
347 | }\r | |
348 | DebugFoundPeimPoint++;\r | |
349 | DebugNotDispatchedBitmap >>= 1;\r | |
350 | }\r | |
eeb1cd5a | 351 | \r |
2ce31132 | 352 | DEBUG_CODE_END ();\r |
878ddf1f | 353 | \r |
2ce31132 | 354 | return EFI_NOT_FOUND;\r |
878ddf1f | 355 | }\r |
356 | \r | |
357 | VOID\r | |
358 | InitializeDispatcherData (\r | |
359 | IN EFI_PEI_SERVICES **PeiServices,\r | |
360 | IN PEI_CORE_INSTANCE *OldCoreData,\r | |
361 | IN EFI_PEI_STARTUP_DESCRIPTOR *PeiStartupDescriptor\r | |
362 | )\r | |
363 | /*++\r | |
364 | \r | |
365 | Routine Description:\r | |
366 | \r | |
367 | Initialize the Dispatcher's data members\r | |
368 | \r | |
369 | Arguments:\r | |
370 | \r | |
371 | PeiServices - The PEI core services table.\r | |
372 | OldCoreData - Pointer to old core data (before switching stack).\r | |
373 | NULL if being run in non-permament memory mode.\r | |
374 | PeiStartupDescriptor - Information and services provided by SEC phase.\r | |
375 | \r | |
376 | Returns:\r | |
377 | \r | |
378 | None.\r | |
379 | \r | |
380 | --*/\r | |
381 | {\r | |
382 | PEI_CORE_INSTANCE *PrivateData;\r | |
383 | \r | |
384 | PrivateData = PEI_CORE_INSTANCE_FROM_PS_THIS (PeiServices);\r | |
385 | \r | |
386 | if (OldCoreData == NULL) {\r | |
387 | PrivateData->DispatchData.CurrentFvAddress = (EFI_FIRMWARE_VOLUME_HEADER *) PeiStartupDescriptor->BootFirmwareVolume;\r | |
388 | PrivateData->DispatchData.BootFvAddress = (EFI_FIRMWARE_VOLUME_HEADER *) PeiStartupDescriptor->BootFirmwareVolume;\r | |
389 | } else {\r | |
390 | \r | |
391 | //\r | |
392 | // Current peim has been dispatched, but not count\r | |
393 | //\r | |
394 | PrivateData->DispatchData.CurrentPeim = (UINT8)(OldCoreData->DispatchData.CurrentPeim + 1);\r | |
395 | }\r | |
396 | \r | |
397 | return;\r | |
398 | }\r | |
399 | \r | |
400 | \r | |
401 | BOOLEAN\r | |
402 | Dispatched (\r | |
403 | IN UINT8 CurrentPeim,\r | |
404 | IN UINT32 DispatchedPeimBitMap\r | |
405 | )\r | |
406 | /*++\r | |
407 | \r | |
408 | Routine Description:\r | |
409 | \r | |
410 | This routine checks to see if a particular PEIM has been dispatched during\r | |
411 | the PEI core dispatch.\r | |
412 | \r | |
413 | Arguments:\r | |
414 | CurrentPeim - The PEIM/FV in the bit array to check.\r | |
415 | DispatchedPeimBitMap - Bit array, each bit corresponds to a PEIM/FV.\r | |
416 | \r | |
417 | Returns:\r | |
418 | TRUE - PEIM already dispatched\r | |
419 | FALSE - Otherwise\r | |
420 | \r | |
421 | --*/\r | |
422 | {\r | |
423 | return (BOOLEAN)((DispatchedPeimBitMap & (1 << CurrentPeim)) != 0);\r | |
424 | }\r | |
425 | \r | |
426 | VOID\r | |
427 | SetDispatched (\r | |
428 | IN EFI_PEI_SERVICES **PeiServices,\r | |
429 | IN UINT8 CurrentPeim,\r | |
430 | OUT UINT32 *DispatchedPeimBitMap\r | |
431 | )\r | |
432 | /*++\r | |
433 | \r | |
434 | Routine Description:\r | |
435 | \r | |
436 | This routine sets a PEIM as having been dispatched once its entry\r | |
437 | point has been invoked.\r | |
438 | \r | |
439 | Arguments:\r | |
440 | \r | |
441 | PeiServices - The PEI core services table.\r | |
442 | CurrentPeim - The PEIM/FV in the bit array to check.\r | |
443 | DispatchedPeimBitMap - Bit array, each bit corresponds to a PEIM/FV.\r | |
444 | \r | |
445 | Returns:\r | |
446 | None\r | |
447 | \r | |
448 | --*/\r | |
449 | {\r | |
450 | //\r | |
451 | // Check if the total number of PEIMs exceed the bitmap.\r | |
452 | // CurrentPeim is 0-based\r | |
453 | //\r | |
4ba61e5e | 454 | ASSERT (CurrentPeim < (sizeof (*DispatchedPeimBitMap) * 8));\r |
878ddf1f | 455 | *DispatchedPeimBitMap |= (1 << CurrentPeim);\r |
456 | return;\r | |
457 | }\r | |
458 | \r | |
459 | BOOLEAN\r | |
460 | DepexSatisfied (\r | |
461 | IN EFI_PEI_SERVICES **PeiServices,\r | |
462 | IN VOID *CurrentPeimAddress\r | |
463 | )\r | |
464 | /*++\r | |
465 | \r | |
466 | Routine Description:\r | |
467 | \r | |
468 | This routine parses the Dependency Expression, if available, and\r | |
469 | decides if the module can be executed.\r | |
470 | \r | |
471 | Arguments:\r | |
472 | PeiServices - The PEI Service Table\r | |
473 | CurrentPeimAddress - Address of the PEIM Firmware File under investigation\r | |
474 | \r | |
475 | Returns:\r | |
476 | TRUE - Can be dispatched\r | |
477 | FALSE - Cannot be dispatched\r | |
478 | \r | |
479 | --*/\r | |
480 | {\r | |
481 | EFI_STATUS Status;\r | |
482 | INT8 *DepexData;\r | |
483 | BOOLEAN Runnable;\r | |
484 | \r | |
84a99d48 | 485 | Status = PeiServicesFfsFindSectionData (\r |
878ddf1f | 486 | EFI_SECTION_PEI_DEPEX,\r |
487 | CurrentPeimAddress,\r | |
488 | (VOID **)&DepexData\r | |
489 | );\r | |
490 | //\r | |
491 | // If there is no DEPEX, assume the module can be executed\r | |
492 | //\r | |
493 | if (EFI_ERROR (Status)) {\r | |
494 | return TRUE;\r | |
495 | }\r | |
496 | \r | |
497 | //\r | |
498 | // Evaluate a given DEPEX\r | |
499 | //\r | |
500 | Status = PeimDispatchReadiness (\r | |
501 | PeiServices,\r | |
502 | DepexData,\r | |
503 | &Runnable\r | |
504 | );\r | |
505 | \r | |
506 | return Runnable;\r | |
507 | }\r | |
508 | \r | |
509 | \r | |
510 | VOID *\r | |
511 | TransferOldDataToNewDataRange (\r | |
512 | IN PEI_CORE_INSTANCE *PrivateData\r | |
513 | )\r | |
514 | /*++\r | |
515 | \r | |
516 | Routine Description:\r | |
517 | \r | |
518 | This routine transfers the contents of the pre-permanent memory\r | |
519 | PEI Core private data to a post-permanent memory data location.\r | |
520 | \r | |
521 | Arguments:\r | |
522 | \r | |
523 | PrivateData - Pointer to the current PEI Core private data pre-permanent memory\r | |
524 | \r | |
525 | Returns:\r | |
526 | \r | |
527 | Pointer to the PrivateData once the private data has been transferred to permanent memory\r | |
528 | \r | |
529 | --*/\r | |
530 | {\r | |
531 | return BuildGuidDataHob (&gEfiPeiCorePrivateGuid, PrivateData, sizeof (PEI_CORE_INSTANCE));\r | |
532 | }\r | |
533 | \r |