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6b46d772 SV |
1 | /** @file\r |
2 | MM Driver Dispatcher.\r | |
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 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 similar to the DXE dispatcher.\r | |
24 | \r | |
25 | The rules for DXE dispatcher are in chapter 10 of the DXE CIS. Figure 10-3\r | |
26 | is the state diagram for the DXE dispatcher\r | |
27 | \r | |
28 | Depex - Dependency Expresion.\r | |
29 | \r | |
30 | Copyright (c) 2014, Hewlett-Packard Development Company, L.P.\r | |
31 | Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>\r | |
32 | Copyright (c) 2016 - 2018, ARM Limited. All rights reserved.<BR>\r | |
33 | \r | |
34 | This program and the accompanying materials are licensed and made available\r | |
35 | under the terms and conditions of the BSD License which accompanies this\r | |
36 | distribution. The full text of the license may be found at\r | |
37 | http://opensource.org/licenses/bsd-license.php\r | |
38 | \r | |
39 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
40 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
41 | \r | |
42 | **/\r | |
43 | \r | |
44 | #include "StandaloneMmCore.h"\r | |
45 | \r | |
46 | //\r | |
47 | // MM Dispatcher Data structures\r | |
48 | //\r | |
49 | #define KNOWN_HANDLE_SIGNATURE SIGNATURE_32('k','n','o','w')\r | |
50 | \r | |
51 | typedef struct {\r | |
52 | UINTN Signature;\r | |
53 | LIST_ENTRY Link; // mFvHandleList\r | |
54 | EFI_HANDLE Handle;\r | |
55 | } KNOWN_HANDLE;\r | |
56 | \r | |
57 | //\r | |
58 | // Function Prototypes\r | |
59 | //\r | |
60 | \r | |
61 | EFI_STATUS\r | |
62 | MmCoreFfsFindMmDriver (\r | |
63 | IN EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader\r | |
64 | );\r | |
65 | \r | |
66 | /**\r | |
67 | Insert InsertedDriverEntry onto the mScheduledQueue. To do this you\r | |
68 | must add any driver with a before dependency on InsertedDriverEntry first.\r | |
69 | You do this by recursively calling this routine. After all the Befores are\r | |
70 | processed you can add InsertedDriverEntry to the mScheduledQueue.\r | |
71 | Then you can add any driver with an After dependency on InsertedDriverEntry\r | |
72 | by recursively calling this routine.\r | |
73 | \r | |
74 | @param InsertedDriverEntry The driver to insert on the ScheduledLink Queue\r | |
75 | \r | |
76 | **/\r | |
77 | VOID\r | |
78 | MmInsertOnScheduledQueueWhileProcessingBeforeAndAfter (\r | |
79 | IN EFI_MM_DRIVER_ENTRY *InsertedDriverEntry\r | |
80 | );\r | |
81 | \r | |
82 | //\r | |
83 | // The Driver List contains one copy of every driver that has been discovered.\r | |
84 | // Items are never removed from the driver list. List of EFI_MM_DRIVER_ENTRY\r | |
85 | //\r | |
86 | LIST_ENTRY mDiscoveredList = INITIALIZE_LIST_HEAD_VARIABLE (mDiscoveredList);\r | |
87 | \r | |
88 | //\r | |
89 | // Queue of drivers that are ready to dispatch. This queue is a subset of the\r | |
90 | // mDiscoveredList.list of EFI_MM_DRIVER_ENTRY.\r | |
91 | //\r | |
92 | LIST_ENTRY mScheduledQueue = INITIALIZE_LIST_HEAD_VARIABLE (mScheduledQueue);\r | |
93 | \r | |
94 | //\r | |
95 | // List of handles who's Fv's have been parsed and added to the mFwDriverList.\r | |
96 | //\r | |
97 | LIST_ENTRY mFvHandleList = INITIALIZE_LIST_HEAD_VARIABLE (mFvHandleList);\r | |
98 | \r | |
99 | //\r | |
100 | // Flag for the MM Dispacher. TRUE if dispatcher is execuing.\r | |
101 | //\r | |
102 | BOOLEAN gDispatcherRunning = FALSE;\r | |
103 | \r | |
104 | //\r | |
105 | // Flag for the MM Dispacher. TRUE if there is one or more MM drivers ready to be dispatched\r | |
106 | //\r | |
107 | BOOLEAN gRequestDispatch = FALSE;\r | |
108 | \r | |
109 | //\r | |
110 | // The global variable is defined for Loading modules at fixed address feature to track the MM code\r | |
111 | // memory range usage. It is a bit mapped array in which every bit indicates the correspoding\r | |
112 | // memory page available or not.\r | |
113 | //\r | |
114 | GLOBAL_REMOVE_IF_UNREFERENCED UINT64 *mMmCodeMemoryRangeUsageBitMap=NULL;\r | |
115 | \r | |
116 | /**\r | |
117 | To check memory usage bit map array to figure out if the memory range in which the image will be loaded\r | |
118 | is available or not. If memory range is avaliable, the function will mark the correponding bits to 1\r | |
119 | which indicates the memory range is used. The function is only invoked when load modules at fixed address\r | |
120 | feature is enabled.\r | |
121 | \r | |
122 | @param ImageBase The base addres the image will be loaded at.\r | |
123 | @param ImageSize The size of the image\r | |
124 | \r | |
125 | @retval EFI_SUCCESS The memory range the image will be loaded in is available\r | |
126 | @retval EFI_NOT_FOUND The memory range the image will be loaded in is not available\r | |
127 | **/\r | |
128 | EFI_STATUS\r | |
129 | CheckAndMarkFixLoadingMemoryUsageBitMap (\r | |
130 | IN EFI_PHYSICAL_ADDRESS ImageBase,\r | |
131 | IN UINTN ImageSize\r | |
132 | )\r | |
133 | {\r | |
134 | UINT32 MmCodePageNumber;\r | |
135 | UINT64 MmCodeSize;\r | |
136 | EFI_PHYSICAL_ADDRESS MmCodeBase;\r | |
137 | UINTN BaseOffsetPageNumber;\r | |
138 | UINTN TopOffsetPageNumber;\r | |
139 | UINTN Index;\r | |
140 | \r | |
141 | //\r | |
142 | // Build tool will calculate the smm code size and then patch the PcdLoadFixAddressMmCodePageNumber\r | |
143 | //\r | |
144 | MmCodePageNumber = 0;\r | |
145 | MmCodeSize = EFI_PAGES_TO_SIZE (MmCodePageNumber);\r | |
146 | MmCodeBase = gLoadModuleAtFixAddressMmramBase;\r | |
147 | \r | |
148 | //\r | |
149 | // If the memory usage bit map is not initialized, do it. Every bit in the array\r | |
150 | // indicate the status of the corresponding memory page, available or not\r | |
151 | //\r | |
152 | if (mMmCodeMemoryRangeUsageBitMap == NULL) {\r | |
153 | mMmCodeMemoryRangeUsageBitMap = AllocateZeroPool (((MmCodePageNumber / 64) + 1) * sizeof (UINT64));\r | |
154 | }\r | |
155 | \r | |
156 | //\r | |
157 | // If the Dxe code memory range is not allocated or the bit map array allocation failed, return EFI_NOT_FOUND\r | |
158 | //\r | |
159 | if (mMmCodeMemoryRangeUsageBitMap == NULL) {\r | |
160 | return EFI_NOT_FOUND;\r | |
161 | }\r | |
162 | \r | |
163 | //\r | |
164 | // see if the memory range for loading the image is in the MM code range.\r | |
165 | //\r | |
166 | if (MmCodeBase + MmCodeSize < ImageBase + ImageSize || MmCodeBase > ImageBase) {\r | |
167 | return EFI_NOT_FOUND;\r | |
168 | }\r | |
169 | \r | |
170 | //\r | |
171 | // Test if the memory is avalaible or not.\r | |
172 | //\r | |
173 | BaseOffsetPageNumber = (UINTN)EFI_SIZE_TO_PAGES ((UINT32)(ImageBase - MmCodeBase));\r | |
174 | TopOffsetPageNumber = (UINTN)EFI_SIZE_TO_PAGES ((UINT32)(ImageBase + ImageSize - MmCodeBase));\r | |
175 | for (Index = BaseOffsetPageNumber; Index < TopOffsetPageNumber; Index ++) {\r | |
176 | if ((mMmCodeMemoryRangeUsageBitMap[Index / 64] & LShiftU64 (1, (Index % 64))) != 0) {\r | |
177 | //\r | |
178 | // This page is already used.\r | |
179 | //\r | |
180 | return EFI_NOT_FOUND;\r | |
181 | }\r | |
182 | }\r | |
183 | \r | |
184 | //\r | |
185 | // Being here means the memory range is available. So mark the bits for the memory range\r | |
186 | //\r | |
187 | for (Index = BaseOffsetPageNumber; Index < TopOffsetPageNumber; Index ++) {\r | |
188 | mMmCodeMemoryRangeUsageBitMap[Index / 64] |= LShiftU64 (1, (Index % 64));\r | |
189 | }\r | |
190 | return EFI_SUCCESS;\r | |
191 | }\r | |
192 | \r | |
193 | /**\r | |
194 | Get the fixed loading address from image header assigned by build tool. This function only be called\r | |
195 | when Loading module at Fixed address feature enabled.\r | |
196 | \r | |
197 | @param ImageContext Pointer to the image context structure that describes the PE/COFF\r | |
198 | image that needs to be examined by this function.\r | |
199 | @retval EFI_SUCCESS An fixed loading address is assigned to this image by build tools .\r | |
200 | @retval EFI_NOT_FOUND The image has no assigned fixed loadding address.\r | |
201 | \r | |
202 | **/\r | |
203 | EFI_STATUS\r | |
204 | GetPeCoffImageFixLoadingAssignedAddress(\r | |
205 | IN OUT PE_COFF_LOADER_IMAGE_CONTEXT *ImageContext\r | |
206 | )\r | |
207 | {\r | |
208 | UINTN SectionHeaderOffset;\r | |
209 | EFI_STATUS Status;\r | |
210 | EFI_IMAGE_SECTION_HEADER SectionHeader;\r | |
211 | EFI_IMAGE_OPTIONAL_HEADER_UNION *ImgHdr;\r | |
212 | EFI_PHYSICAL_ADDRESS FixLoadingAddress;\r | |
213 | UINT16 Index;\r | |
214 | UINTN Size;\r | |
215 | UINT16 NumberOfSections;\r | |
216 | UINT64 ValueInSectionHeader;\r | |
217 | \r | |
218 | FixLoadingAddress = 0;\r | |
219 | Status = EFI_NOT_FOUND;\r | |
220 | \r | |
221 | //\r | |
222 | // Get PeHeader pointer\r | |
223 | //\r | |
224 | ImgHdr = (EFI_IMAGE_OPTIONAL_HEADER_UNION *)((CHAR8* )ImageContext->Handle + ImageContext->PeCoffHeaderOffset);\r | |
225 | SectionHeaderOffset = ImageContext->PeCoffHeaderOffset + sizeof (UINT32) + sizeof (EFI_IMAGE_FILE_HEADER) +\r | |
226 | ImgHdr->Pe32.FileHeader.SizeOfOptionalHeader;\r | |
227 | NumberOfSections = ImgHdr->Pe32.FileHeader.NumberOfSections;\r | |
228 | \r | |
229 | //\r | |
230 | // Get base address from the first section header that doesn't point to code section.\r | |
231 | //\r | |
232 | for (Index = 0; Index < NumberOfSections; Index++) {\r | |
233 | //\r | |
234 | // Read section header from file\r | |
235 | //\r | |
236 | Size = sizeof (EFI_IMAGE_SECTION_HEADER);\r | |
237 | Status = ImageContext->ImageRead (\r | |
238 | ImageContext->Handle,\r | |
239 | SectionHeaderOffset,\r | |
240 | &Size,\r | |
241 | &SectionHeader\r | |
242 | );\r | |
243 | if (EFI_ERROR (Status)) {\r | |
244 | return Status;\r | |
245 | }\r | |
246 | \r | |
247 | Status = EFI_NOT_FOUND;\r | |
248 | \r | |
249 | if ((SectionHeader.Characteristics & EFI_IMAGE_SCN_CNT_CODE) == 0) {\r | |
250 | //\r | |
251 | // Build tool will save the address in PointerToRelocations & PointerToLineNumbers fields\r | |
252 | // in the first section header that doesn't point to code section in image header. So there\r | |
253 | // is an assumption that when the feature is enabled, if a module with a loading address\r | |
254 | // assigned by tools, the PointerToRelocations & PointerToLineNumbers fields should not be\r | |
255 | // Zero, or else, these 2 fields should be set to Zero\r | |
256 | //\r | |
257 | ValueInSectionHeader = ReadUnaligned64 ((UINT64*)&SectionHeader.PointerToRelocations);\r | |
258 | if (ValueInSectionHeader != 0) {\r | |
259 | //\r | |
260 | // Found first section header that doesn't point to code section in which build tool saves the\r | |
261 | // offset to SMRAM base as image base in PointerToRelocations & PointerToLineNumbers fields\r | |
262 | //\r | |
263 | FixLoadingAddress = (EFI_PHYSICAL_ADDRESS)(gLoadModuleAtFixAddressMmramBase + (INT64)ValueInSectionHeader);\r | |
264 | //\r | |
265 | // Check if the memory range is available.\r | |
266 | //\r | |
267 | Status = CheckAndMarkFixLoadingMemoryUsageBitMap (FixLoadingAddress, (UINTN)(ImageContext->ImageSize + ImageContext->SectionAlignment));\r | |
268 | if (!EFI_ERROR(Status)) {\r | |
269 | //\r | |
270 | // The assigned address is valid. Return the specified loading address\r | |
271 | //\r | |
272 | ImageContext->ImageAddress = FixLoadingAddress;\r | |
273 | }\r | |
274 | }\r | |
275 | break;\r | |
276 | }\r | |
277 | SectionHeaderOffset += sizeof (EFI_IMAGE_SECTION_HEADER);\r | |
278 | }\r | |
279 | DEBUG ((DEBUG_INFO|DEBUG_LOAD, "LOADING MODULE FIXED INFO: Loading module at fixed address %x, Status = %r\n",\r | |
280 | FixLoadingAddress, Status));\r | |
281 | return Status;\r | |
282 | }\r | |
283 | /**\r | |
284 | Loads an EFI image into SMRAM.\r | |
285 | \r | |
286 | @param DriverEntry EFI_MM_DRIVER_ENTRY instance\r | |
287 | \r | |
288 | @return EFI_STATUS\r | |
289 | \r | |
290 | **/\r | |
291 | EFI_STATUS\r | |
292 | EFIAPI\r | |
293 | MmLoadImage (\r | |
294 | IN OUT EFI_MM_DRIVER_ENTRY *DriverEntry\r | |
295 | )\r | |
296 | {\r | |
6b46d772 SV |
297 | UINTN PageCount;\r |
298 | EFI_STATUS Status;\r | |
299 | EFI_PHYSICAL_ADDRESS DstBuffer;\r | |
300 | PE_COFF_LOADER_IMAGE_CONTEXT ImageContext;\r | |
301 | \r | |
302 | DEBUG ((DEBUG_INFO, "MmLoadImage - %g\n", &DriverEntry->FileName));\r | |
303 | \r | |
6b46d772 SV |
304 | Status = EFI_SUCCESS;\r |
305 | \r | |
306 | //\r | |
307 | // Initialize ImageContext\r | |
308 | //\r | |
877013d0 | 309 | ImageContext.Handle = DriverEntry->Pe32Data;\r |
6b46d772 SV |
310 | ImageContext.ImageRead = PeCoffLoaderImageReadFromMemory;\r |
311 | \r | |
312 | //\r | |
313 | // Get information about the image being loaded\r | |
314 | //\r | |
315 | Status = PeCoffLoaderGetImageInfo (&ImageContext);\r | |
316 | if (EFI_ERROR (Status)) {\r | |
6b46d772 SV |
317 | return Status;\r |
318 | }\r | |
319 | \r | |
320 | PageCount = (UINTN)EFI_SIZE_TO_PAGES ((UINTN)ImageContext.ImageSize + ImageContext.SectionAlignment);\r | |
321 | DstBuffer = (UINTN)(-1);\r | |
322 | \r | |
323 | Status = MmAllocatePages (\r | |
324 | AllocateMaxAddress,\r | |
325 | EfiRuntimeServicesCode,\r | |
326 | PageCount,\r | |
327 | &DstBuffer\r | |
328 | );\r | |
329 | if (EFI_ERROR (Status)) {\r | |
6b46d772 SV |
330 | return Status;\r |
331 | }\r | |
332 | \r | |
333 | ImageContext.ImageAddress = (EFI_PHYSICAL_ADDRESS)DstBuffer;\r | |
334 | \r | |
335 | //\r | |
336 | // Align buffer on section boundry\r | |
337 | //\r | |
338 | ImageContext.ImageAddress += ImageContext.SectionAlignment - 1;\r | |
339 | ImageContext.ImageAddress &= ~((EFI_PHYSICAL_ADDRESS)(ImageContext.SectionAlignment - 1));\r | |
340 | \r | |
341 | //\r | |
342 | // Load the image to our new buffer\r | |
343 | //\r | |
344 | Status = PeCoffLoaderLoadImage (&ImageContext);\r | |
345 | if (EFI_ERROR (Status)) {\r | |
6b46d772 SV |
346 | MmFreePages (DstBuffer, PageCount);\r |
347 | return Status;\r | |
348 | }\r | |
349 | \r | |
350 | //\r | |
351 | // Relocate the image in our new buffer\r | |
352 | //\r | |
353 | Status = PeCoffLoaderRelocateImage (&ImageContext);\r | |
354 | if (EFI_ERROR (Status)) {\r | |
6b46d772 SV |
355 | MmFreePages (DstBuffer, PageCount);\r |
356 | return Status;\r | |
357 | }\r | |
358 | \r | |
359 | //\r | |
360 | // Flush the instruction cache so the image data are written before we execute it\r | |
361 | //\r | |
362 | InvalidateInstructionCacheRange ((VOID *)(UINTN) ImageContext.ImageAddress, (UINTN) ImageContext.ImageSize);\r | |
363 | \r | |
364 | //\r | |
365 | // Save Image EntryPoint in DriverEntry\r | |
366 | //\r | |
367 | DriverEntry->ImageEntryPoint = ImageContext.EntryPoint;\r | |
368 | DriverEntry->ImageBuffer = DstBuffer;\r | |
369 | DriverEntry->NumberOfPage = PageCount;\r | |
370 | \r | |
371 | if (mEfiSystemTable != NULL) {\r | |
372 | Status = mEfiSystemTable->BootServices->AllocatePool (\r | |
373 | EfiBootServicesData,\r | |
374 | sizeof (EFI_LOADED_IMAGE_PROTOCOL),\r | |
375 | (VOID **)&DriverEntry->LoadedImage\r | |
376 | );\r | |
377 | if (EFI_ERROR (Status)) {\r | |
6b46d772 SV |
378 | MmFreePages (DstBuffer, PageCount);\r |
379 | return Status;\r | |
380 | }\r | |
381 | \r | |
382 | ZeroMem (DriverEntry->LoadedImage, sizeof (EFI_LOADED_IMAGE_PROTOCOL));\r | |
383 | //\r | |
384 | // Fill in the remaining fields of the Loaded Image Protocol instance.\r | |
385 | // Note: ImageBase is an SMRAM address that can not be accessed outside of SMRAM if SMRAM window is closed.\r | |
386 | //\r | |
387 | DriverEntry->LoadedImage->Revision = EFI_LOADED_IMAGE_PROTOCOL_REVISION;\r | |
388 | DriverEntry->LoadedImage->ParentHandle = NULL;\r | |
389 | DriverEntry->LoadedImage->SystemTable = mEfiSystemTable;\r | |
390 | DriverEntry->LoadedImage->DeviceHandle = NULL;\r | |
391 | DriverEntry->LoadedImage->FilePath = NULL;\r | |
392 | \r | |
393 | DriverEntry->LoadedImage->ImageBase = (VOID *)(UINTN)DriverEntry->ImageBuffer;\r | |
394 | DriverEntry->LoadedImage->ImageSize = ImageContext.ImageSize;\r | |
395 | DriverEntry->LoadedImage->ImageCodeType = EfiRuntimeServicesCode;\r | |
396 | DriverEntry->LoadedImage->ImageDataType = EfiRuntimeServicesData;\r | |
397 | \r | |
398 | //\r | |
399 | // Create a new image handle in the UEFI handle database for the MM Driver\r | |
400 | //\r | |
401 | DriverEntry->ImageHandle = NULL;\r | |
402 | Status = mEfiSystemTable->BootServices->InstallMultipleProtocolInterfaces (\r | |
403 | &DriverEntry->ImageHandle,\r | |
404 | &gEfiLoadedImageProtocolGuid,\r | |
405 | DriverEntry->LoadedImage,\r | |
406 | NULL\r | |
407 | );\r | |
408 | }\r | |
409 | \r | |
410 | //\r | |
411 | // Print the load address and the PDB file name if it is available\r | |
412 | //\r | |
413 | DEBUG_CODE_BEGIN ();\r | |
414 | \r | |
415 | UINTN Index;\r | |
416 | UINTN StartIndex;\r | |
417 | CHAR8 EfiFileName[256];\r | |
418 | \r | |
419 | DEBUG ((DEBUG_INFO | DEBUG_LOAD,\r | |
420 | "Loading MM driver at 0x%11p EntryPoint=0x%11p ",\r | |
421 | (VOID *)(UINTN) ImageContext.ImageAddress,\r | |
422 | FUNCTION_ENTRY_POINT (ImageContext.EntryPoint)));\r | |
423 | \r | |
424 | //\r | |
425 | // Print Module Name by Pdb file path.\r | |
426 | // Windows and Unix style file path are all trimmed correctly.\r | |
427 | //\r | |
428 | if (ImageContext.PdbPointer != NULL) {\r | |
429 | StartIndex = 0;\r | |
430 | for (Index = 0; ImageContext.PdbPointer[Index] != 0; Index++) {\r | |
431 | if ((ImageContext.PdbPointer[Index] == '\\') || (ImageContext.PdbPointer[Index] == '/')) {\r | |
432 | StartIndex = Index + 1;\r | |
433 | }\r | |
434 | }\r | |
435 | \r | |
436 | //\r | |
437 | // Copy the PDB file name to our temporary string, and replace .pdb with .efi\r | |
438 | // The PDB file name is limited in the range of 0~255.\r | |
439 | // If the length is bigger than 255, trim the redudant characters to avoid overflow in array boundary.\r | |
440 | //\r | |
441 | for (Index = 0; Index < sizeof (EfiFileName) - 4; Index++) {\r | |
442 | EfiFileName[Index] = ImageContext.PdbPointer[Index + StartIndex];\r | |
443 | if (EfiFileName[Index] == 0) {\r | |
444 | EfiFileName[Index] = '.';\r | |
445 | }\r | |
446 | if (EfiFileName[Index] == '.') {\r | |
447 | EfiFileName[Index + 1] = 'e';\r | |
448 | EfiFileName[Index + 2] = 'f';\r | |
449 | EfiFileName[Index + 3] = 'i';\r | |
450 | EfiFileName[Index + 4] = 0;\r | |
451 | break;\r | |
452 | }\r | |
453 | }\r | |
454 | \r | |
455 | if (Index == sizeof (EfiFileName) - 4) {\r | |
456 | EfiFileName[Index] = 0;\r | |
457 | }\r | |
458 | DEBUG ((DEBUG_INFO | DEBUG_LOAD, "%a", EfiFileName));\r | |
459 | }\r | |
460 | DEBUG ((DEBUG_INFO | DEBUG_LOAD, "\n"));\r | |
461 | \r | |
462 | DEBUG_CODE_END ();\r | |
463 | \r | |
6b46d772 SV |
464 | return Status;\r |
465 | }\r | |
466 | \r | |
467 | /**\r | |
468 | Preprocess dependency expression and update DriverEntry to reflect the\r | |
469 | state of Before and After dependencies. If DriverEntry->Before\r | |
470 | or DriverEntry->After is set it will never be cleared.\r | |
471 | \r | |
472 | @param DriverEntry DriverEntry element to update .\r | |
473 | \r | |
474 | @retval EFI_SUCCESS It always works.\r | |
475 | \r | |
476 | **/\r | |
477 | EFI_STATUS\r | |
478 | MmPreProcessDepex (\r | |
479 | IN EFI_MM_DRIVER_ENTRY *DriverEntry\r | |
480 | )\r | |
481 | {\r | |
482 | UINT8 *Iterator;\r | |
483 | \r | |
484 | Iterator = DriverEntry->Depex;\r | |
485 | DriverEntry->Dependent = TRUE;\r | |
486 | \r | |
487 | if (*Iterator == EFI_DEP_BEFORE) {\r | |
488 | DriverEntry->Before = TRUE;\r | |
489 | } else if (*Iterator == EFI_DEP_AFTER) {\r | |
490 | DriverEntry->After = TRUE;\r | |
491 | }\r | |
492 | \r | |
493 | if (DriverEntry->Before || DriverEntry->After) {\r | |
494 | CopyMem (&DriverEntry->BeforeAfterGuid, Iterator + 1, sizeof (EFI_GUID));\r | |
495 | }\r | |
496 | \r | |
497 | return EFI_SUCCESS;\r | |
498 | }\r | |
499 | \r | |
500 | /**\r | |
501 | Read Depex and pre-process the Depex for Before and After. If Section Extraction\r | |
502 | protocol returns an error via ReadSection defer the reading of the Depex.\r | |
503 | \r | |
504 | @param DriverEntry Driver to work on.\r | |
505 | \r | |
506 | @retval EFI_SUCCESS Depex read and preprossesed\r | |
507 | @retval EFI_PROTOCOL_ERROR The section extraction protocol returned an error\r | |
508 | and Depex reading needs to be retried.\r | |
509 | @retval Error DEPEX not found.\r | |
510 | \r | |
511 | **/\r | |
512 | EFI_STATUS\r | |
513 | MmGetDepexSectionAndPreProccess (\r | |
514 | IN EFI_MM_DRIVER_ENTRY *DriverEntry\r | |
515 | )\r | |
516 | {\r | |
517 | EFI_STATUS Status;\r | |
518 | \r | |
519 | //\r | |
520 | // Data already read\r | |
521 | //\r | |
522 | if (DriverEntry->Depex == NULL) {\r | |
523 | Status = EFI_NOT_FOUND;\r | |
524 | } else {\r | |
525 | Status = EFI_SUCCESS;\r | |
526 | }\r | |
527 | if (EFI_ERROR (Status)) {\r | |
528 | if (Status == EFI_PROTOCOL_ERROR) {\r | |
529 | //\r | |
530 | // The section extraction protocol failed so set protocol error flag\r | |
531 | //\r | |
532 | DriverEntry->DepexProtocolError = TRUE;\r | |
533 | } else {\r | |
534 | //\r | |
535 | // If no Depex assume depend on all architectural protocols\r | |
536 | //\r | |
537 | DriverEntry->Depex = NULL;\r | |
538 | DriverEntry->Dependent = TRUE;\r | |
539 | DriverEntry->DepexProtocolError = FALSE;\r | |
540 | }\r | |
541 | } else {\r | |
542 | //\r | |
543 | // Set Before and After state information based on Depex\r | |
544 | // Driver will be put in Dependent state\r | |
545 | //\r | |
546 | MmPreProcessDepex (DriverEntry);\r | |
547 | DriverEntry->DepexProtocolError = FALSE;\r | |
548 | }\r | |
549 | \r | |
550 | return Status;\r | |
551 | }\r | |
552 | \r | |
553 | /**\r | |
554 | This is the main Dispatcher for MM and it exits when there are no more\r | |
555 | drivers to run. Drain the mScheduledQueue and load and start a PE\r | |
556 | image for each driver. Search the mDiscoveredList to see if any driver can\r | |
557 | be placed on the mScheduledQueue. If no drivers are placed on the\r | |
558 | mScheduledQueue exit the function.\r | |
559 | \r | |
560 | @retval EFI_SUCCESS All of the MM Drivers that could be dispatched\r | |
561 | have been run and the MM Entry Point has been\r | |
562 | registered.\r | |
563 | @retval EFI_NOT_READY The MM Driver that registered the MM Entry Point\r | |
564 | was just dispatched.\r | |
565 | @retval EFI_NOT_FOUND There are no MM Drivers available to be dispatched.\r | |
566 | @retval EFI_ALREADY_STARTED The MM Dispatcher is already running\r | |
567 | \r | |
568 | **/\r | |
569 | EFI_STATUS\r | |
570 | MmDispatcher (\r | |
571 | VOID\r | |
572 | )\r | |
573 | {\r | |
574 | EFI_STATUS Status;\r | |
575 | LIST_ENTRY *Link;\r | |
576 | EFI_MM_DRIVER_ENTRY *DriverEntry;\r | |
577 | BOOLEAN ReadyToRun;\r | |
6b46d772 SV |
578 | \r |
579 | DEBUG ((DEBUG_INFO, "MmDispatcher\n"));\r | |
580 | \r | |
581 | if (!gRequestDispatch) {\r | |
582 | DEBUG ((DEBUG_INFO, " !gRequestDispatch\n"));\r | |
583 | return EFI_NOT_FOUND;\r | |
584 | }\r | |
585 | \r | |
586 | if (gDispatcherRunning) {\r | |
587 | DEBUG ((DEBUG_INFO, " gDispatcherRunning\n"));\r | |
588 | //\r | |
589 | // If the dispatcher is running don't let it be restarted.\r | |
590 | //\r | |
591 | return EFI_ALREADY_STARTED;\r | |
592 | }\r | |
593 | \r | |
594 | gDispatcherRunning = TRUE;\r | |
595 | \r | |
596 | do {\r | |
597 | //\r | |
598 | // Drain the Scheduled Queue\r | |
599 | //\r | |
600 | DEBUG ((DEBUG_INFO, " Drain the Scheduled Queue\n"));\r | |
601 | while (!IsListEmpty (&mScheduledQueue)) {\r | |
602 | DriverEntry = CR (\r | |
603 | mScheduledQueue.ForwardLink,\r | |
604 | EFI_MM_DRIVER_ENTRY,\r | |
605 | ScheduledLink,\r | |
606 | EFI_MM_DRIVER_ENTRY_SIGNATURE\r | |
607 | );\r | |
608 | DEBUG ((DEBUG_INFO, " DriverEntry (Scheduled) - %g\n", &DriverEntry->FileName));\r | |
609 | \r | |
610 | //\r | |
611 | // Load the MM Driver image into memory. If the Driver was transitioned from\r | |
612 | // Untrused to Scheduled it would have already been loaded so we may need to\r | |
613 | // skip the LoadImage\r | |
614 | //\r | |
615 | if (DriverEntry->ImageHandle == NULL) {\r | |
616 | Status = MmLoadImage (DriverEntry);\r | |
617 | \r | |
618 | //\r | |
619 | // Update the driver state to reflect that it's been loaded\r | |
620 | //\r | |
621 | if (EFI_ERROR (Status)) {\r | |
622 | //\r | |
623 | // The MM Driver could not be loaded, and do not attempt to load or start it again.\r | |
624 | // Take driver from Scheduled to Initialized.\r | |
625 | //\r | |
626 | DriverEntry->Initialized = TRUE;\r | |
627 | DriverEntry->Scheduled = FALSE;\r | |
628 | RemoveEntryList (&DriverEntry->ScheduledLink);\r | |
629 | \r | |
630 | //\r | |
631 | // If it's an error don't try the StartImage\r | |
632 | //\r | |
633 | continue;\r | |
634 | }\r | |
635 | }\r | |
636 | \r | |
637 | DriverEntry->Scheduled = FALSE;\r | |
638 | DriverEntry->Initialized = TRUE;\r | |
639 | RemoveEntryList (&DriverEntry->ScheduledLink);\r | |
640 | \r | |
6b46d772 SV |
641 | //\r |
642 | // For each MM driver, pass NULL as ImageHandle\r | |
643 | //\r | |
644 | if (mEfiSystemTable == NULL) {\r | |
645 | DEBUG ((DEBUG_INFO, "StartImage - 0x%x (Standalone Mode)\n", DriverEntry->ImageEntryPoint));\r | |
646 | Status = ((MM_IMAGE_ENTRY_POINT)(UINTN)DriverEntry->ImageEntryPoint) (DriverEntry->ImageHandle, &gMmCoreMmst);\r | |
647 | } else {\r | |
648 | DEBUG ((DEBUG_INFO, "StartImage - 0x%x (Tradition Mode)\n", DriverEntry->ImageEntryPoint));\r | |
649 | Status = ((EFI_IMAGE_ENTRY_POINT)(UINTN)DriverEntry->ImageEntryPoint) (\r | |
650 | DriverEntry->ImageHandle,\r | |
651 | mEfiSystemTable\r | |
652 | );\r | |
653 | }\r | |
654 | if (EFI_ERROR(Status)) {\r | |
655 | DEBUG ((DEBUG_INFO, "StartImage Status - %r\n", Status));\r | |
656 | MmFreePages(DriverEntry->ImageBuffer, DriverEntry->NumberOfPage);\r | |
657 | }\r | |
6b46d772 SV |
658 | }\r |
659 | \r | |
660 | //\r | |
661 | // Search DriverList for items to place on Scheduled Queue\r | |
662 | //\r | |
663 | DEBUG ((DEBUG_INFO, " Search DriverList for items to place on Scheduled Queue\n"));\r | |
664 | ReadyToRun = FALSE;\r | |
665 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
666 | DriverEntry = CR (Link, EFI_MM_DRIVER_ENTRY, Link, EFI_MM_DRIVER_ENTRY_SIGNATURE);\r | |
667 | DEBUG ((DEBUG_INFO, " DriverEntry (Discovered) - %g\n", &DriverEntry->FileName));\r | |
668 | \r | |
669 | if (DriverEntry->DepexProtocolError) {\r | |
670 | //\r | |
671 | // If Section Extraction Protocol did not let the Depex be read before retry the read\r | |
672 | //\r | |
673 | Status = MmGetDepexSectionAndPreProccess (DriverEntry);\r | |
674 | }\r | |
675 | \r | |
676 | if (DriverEntry->Dependent) {\r | |
677 | if (MmIsSchedulable (DriverEntry)) {\r | |
678 | MmInsertOnScheduledQueueWhileProcessingBeforeAndAfter (DriverEntry);\r | |
679 | ReadyToRun = TRUE;\r | |
680 | }\r | |
681 | }\r | |
682 | }\r | |
683 | } while (ReadyToRun);\r | |
684 | \r | |
685 | //\r | |
686 | // If there is no more MM driver to dispatch, stop the dispatch request\r | |
687 | //\r | |
688 | DEBUG ((DEBUG_INFO, " no more MM driver to dispatch, stop the dispatch request\n"));\r | |
689 | gRequestDispatch = FALSE;\r | |
690 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
691 | DriverEntry = CR (Link, EFI_MM_DRIVER_ENTRY, Link, EFI_MM_DRIVER_ENTRY_SIGNATURE);\r | |
692 | DEBUG ((DEBUG_INFO, " DriverEntry (Discovered) - %g\n", &DriverEntry->FileName));\r | |
693 | \r | |
694 | if (!DriverEntry->Initialized) {\r | |
695 | //\r | |
696 | // We have MM driver pending to dispatch\r | |
697 | //\r | |
698 | gRequestDispatch = TRUE;\r | |
699 | break;\r | |
700 | }\r | |
701 | }\r | |
702 | \r | |
703 | gDispatcherRunning = FALSE;\r | |
704 | \r | |
705 | return EFI_SUCCESS;\r | |
706 | }\r | |
707 | \r | |
708 | /**\r | |
709 | Insert InsertedDriverEntry onto the mScheduledQueue. To do this you\r | |
710 | must add any driver with a before dependency on InsertedDriverEntry first.\r | |
711 | You do this by recursively calling this routine. After all the Befores are\r | |
712 | processed you can add InsertedDriverEntry to the mScheduledQueue.\r | |
713 | Then you can add any driver with an After dependency on InsertedDriverEntry\r | |
714 | by recursively calling this routine.\r | |
715 | \r | |
716 | @param InsertedDriverEntry The driver to insert on the ScheduledLink Queue\r | |
717 | \r | |
718 | **/\r | |
719 | VOID\r | |
720 | MmInsertOnScheduledQueueWhileProcessingBeforeAndAfter (\r | |
721 | IN EFI_MM_DRIVER_ENTRY *InsertedDriverEntry\r | |
722 | )\r | |
723 | {\r | |
724 | LIST_ENTRY *Link;\r | |
725 | EFI_MM_DRIVER_ENTRY *DriverEntry;\r | |
726 | \r | |
727 | //\r | |
728 | // Process Before Dependency\r | |
729 | //\r | |
730 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
731 | DriverEntry = CR(Link, EFI_MM_DRIVER_ENTRY, Link, EFI_MM_DRIVER_ENTRY_SIGNATURE);\r | |
732 | if (DriverEntry->Before && DriverEntry->Dependent && DriverEntry != InsertedDriverEntry) {\r | |
733 | DEBUG ((DEBUG_DISPATCH, "Evaluate MM DEPEX for FFS(%g)\n", &DriverEntry->FileName));\r | |
734 | DEBUG ((DEBUG_DISPATCH, " BEFORE FFS(%g) = ", &DriverEntry->BeforeAfterGuid));\r | |
735 | if (CompareGuid (&InsertedDriverEntry->FileName, &DriverEntry->BeforeAfterGuid)) {\r | |
736 | //\r | |
737 | // Recursively process BEFORE\r | |
738 | //\r | |
739 | DEBUG ((DEBUG_DISPATCH, "TRUE\n END\n RESULT = TRUE\n"));\r | |
740 | MmInsertOnScheduledQueueWhileProcessingBeforeAndAfter (DriverEntry);\r | |
741 | } else {\r | |
742 | DEBUG ((DEBUG_DISPATCH, "FALSE\n END\n RESULT = FALSE\n"));\r | |
743 | }\r | |
744 | }\r | |
745 | }\r | |
746 | \r | |
747 | //\r | |
748 | // Convert driver from Dependent to Scheduled state\r | |
749 | //\r | |
750 | \r | |
751 | InsertedDriverEntry->Dependent = FALSE;\r | |
752 | InsertedDriverEntry->Scheduled = TRUE;\r | |
753 | InsertTailList (&mScheduledQueue, &InsertedDriverEntry->ScheduledLink);\r | |
754 | \r | |
755 | \r | |
756 | //\r | |
757 | // Process After Dependency\r | |
758 | //\r | |
759 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
760 | DriverEntry = CR(Link, EFI_MM_DRIVER_ENTRY, Link, EFI_MM_DRIVER_ENTRY_SIGNATURE);\r | |
761 | if (DriverEntry->After && DriverEntry->Dependent && DriverEntry != InsertedDriverEntry) {\r | |
762 | DEBUG ((DEBUG_DISPATCH, "Evaluate MM DEPEX for FFS(%g)\n", &DriverEntry->FileName));\r | |
763 | DEBUG ((DEBUG_DISPATCH, " AFTER FFS(%g) = ", &DriverEntry->BeforeAfterGuid));\r | |
764 | if (CompareGuid (&InsertedDriverEntry->FileName, &DriverEntry->BeforeAfterGuid)) {\r | |
765 | //\r | |
766 | // Recursively process AFTER\r | |
767 | //\r | |
768 | DEBUG ((DEBUG_DISPATCH, "TRUE\n END\n RESULT = TRUE\n"));\r | |
769 | MmInsertOnScheduledQueueWhileProcessingBeforeAndAfter (DriverEntry);\r | |
770 | } else {\r | |
771 | DEBUG ((DEBUG_DISPATCH, "FALSE\n END\n RESULT = FALSE\n"));\r | |
772 | }\r | |
773 | }\r | |
774 | }\r | |
775 | }\r | |
776 | \r | |
777 | /**\r | |
778 | Return TRUE if the Fv has been processed, FALSE if not.\r | |
779 | \r | |
780 | @param FvHandle The handle of a FV that's being tested\r | |
781 | \r | |
782 | @retval TRUE Fv protocol on FvHandle has been processed\r | |
783 | @retval FALSE Fv protocol on FvHandle has not yet been\r | |
784 | processed\r | |
785 | \r | |
786 | **/\r | |
787 | BOOLEAN\r | |
788 | FvHasBeenProcessed (\r | |
789 | IN EFI_HANDLE FvHandle\r | |
790 | )\r | |
791 | {\r | |
792 | LIST_ENTRY *Link;\r | |
793 | KNOWN_HANDLE *KnownHandle;\r | |
794 | \r | |
795 | for (Link = mFvHandleList.ForwardLink; Link != &mFvHandleList; Link = Link->ForwardLink) {\r | |
796 | KnownHandle = CR (Link, KNOWN_HANDLE, Link, KNOWN_HANDLE_SIGNATURE);\r | |
797 | if (KnownHandle->Handle == FvHandle) {\r | |
798 | return TRUE;\r | |
799 | }\r | |
800 | }\r | |
801 | return FALSE;\r | |
802 | }\r | |
803 | \r | |
804 | /**\r | |
805 | Remember that Fv protocol on FvHandle has had it's drivers placed on the\r | |
806 | mDiscoveredList. This fucntion adds entries on the mFvHandleList. Items are\r | |
807 | never removed/freed from the mFvHandleList.\r | |
808 | \r | |
809 | @param FvHandle The handle of a FV that has been processed\r | |
810 | \r | |
811 | **/\r | |
812 | VOID\r | |
813 | FvIsBeingProcesssed (\r | |
814 | IN EFI_HANDLE FvHandle\r | |
815 | )\r | |
816 | {\r | |
817 | KNOWN_HANDLE *KnownHandle;\r | |
818 | \r | |
819 | DEBUG ((DEBUG_INFO, "FvIsBeingProcesssed - 0x%08x\n", FvHandle));\r | |
820 | \r | |
821 | KnownHandle = AllocatePool (sizeof (KNOWN_HANDLE));\r | |
822 | ASSERT (KnownHandle != NULL);\r | |
823 | \r | |
824 | KnownHandle->Signature = KNOWN_HANDLE_SIGNATURE;\r | |
825 | KnownHandle->Handle = FvHandle;\r | |
826 | InsertTailList (&mFvHandleList, &KnownHandle->Link);\r | |
827 | }\r | |
828 | \r | |
829 | /**\r | |
830 | Add an entry to the mDiscoveredList. Allocate memory to store the DriverEntry,\r | |
831 | and initilize any state variables. Read the Depex from the FV and store it\r | |
832 | in DriverEntry. Pre-process the Depex to set the Before and After state.\r | |
833 | The Discovered list is never free'ed and contains booleans that represent the\r | |
834 | other possible MM driver states.\r | |
835 | \r | |
836 | @param Fv Fv protocol, needed to read Depex info out of\r | |
837 | FLASH.\r | |
838 | @param FvHandle Handle for Fv, needed in the\r | |
839 | EFI_MM_DRIVER_ENTRY so that the PE image can be\r | |
840 | read out of the FV at a later time.\r | |
841 | @param DriverName Name of driver to add to mDiscoveredList.\r | |
842 | \r | |
843 | @retval EFI_SUCCESS If driver was added to the mDiscoveredList.\r | |
844 | @retval EFI_ALREADY_STARTED The driver has already been started. Only one\r | |
845 | DriverName may be active in the system at any one\r | |
846 | time.\r | |
847 | \r | |
848 | **/\r | |
849 | EFI_STATUS\r | |
850 | MmAddToDriverList (\r | |
851 | IN EFI_HANDLE FvHandle,\r | |
852 | IN VOID *Pe32Data,\r | |
853 | IN UINTN Pe32DataSize,\r | |
854 | IN VOID *Depex,\r | |
855 | IN UINTN DepexSize,\r | |
856 | IN EFI_GUID *DriverName\r | |
857 | )\r | |
858 | {\r | |
859 | EFI_MM_DRIVER_ENTRY *DriverEntry;\r | |
860 | \r | |
861 | DEBUG ((DEBUG_INFO, "MmAddToDriverList - %g (0x%08x)\n", DriverName, Pe32Data));\r | |
862 | \r | |
863 | //\r | |
864 | // Create the Driver Entry for the list. ZeroPool initializes lots of variables to\r | |
865 | // NULL or FALSE.\r | |
866 | //\r | |
867 | DriverEntry = AllocateZeroPool (sizeof (EFI_MM_DRIVER_ENTRY));\r | |
868 | ASSERT (DriverEntry != NULL);\r | |
869 | \r | |
870 | DriverEntry->Signature = EFI_MM_DRIVER_ENTRY_SIGNATURE;\r | |
871 | CopyGuid (&DriverEntry->FileName, DriverName);\r | |
872 | DriverEntry->FvHandle = FvHandle;\r | |
873 | DriverEntry->Pe32Data = Pe32Data;\r | |
874 | DriverEntry->Pe32DataSize = Pe32DataSize;\r | |
875 | DriverEntry->Depex = Depex;\r | |
876 | DriverEntry->DepexSize = DepexSize;\r | |
877 | \r | |
878 | MmGetDepexSectionAndPreProccess (DriverEntry);\r | |
879 | \r | |
880 | InsertTailList (&mDiscoveredList, &DriverEntry->Link);\r | |
881 | gRequestDispatch = TRUE;\r | |
882 | \r | |
883 | return EFI_SUCCESS;\r | |
884 | }\r | |
885 | \r | |
6b46d772 SV |
886 | /**\r |
887 | This function is the main entry point for an MM handler dispatch\r | |
888 | or communicate-based callback.\r | |
889 | \r | |
890 | @param DispatchHandle The unique handle assigned to this handler by SmiHandlerRegister().\r | |
891 | @param Context Points to an optional handler context which was specified when the handler was registered.\r | |
892 | @param CommBuffer A pointer to a collection of data in memory that will\r | |
893 | be conveyed from a non-MM environment into an MM environment.\r | |
894 | @param CommBufferSize The size of the CommBuffer.\r | |
895 | \r | |
896 | @return Status Code\r | |
897 | \r | |
898 | **/\r | |
899 | EFI_STATUS\r | |
900 | EFIAPI\r | |
901 | MmFvDispatchHandler (\r | |
902 | IN EFI_HANDLE DispatchHandle,\r | |
903 | IN CONST VOID *Context, OPTIONAL\r | |
904 | IN OUT VOID *CommBuffer, OPTIONAL\r | |
905 | IN OUT UINTN *CommBufferSize OPTIONAL\r | |
906 | )\r | |
907 | {\r | |
908 | EFI_STATUS Status;\r | |
909 | EFI_MM_COMMUNICATE_FV_DISPATCH_DATA *CommunicationFvDispatchData;\r | |
910 | EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;\r | |
911 | \r | |
912 | DEBUG ((DEBUG_INFO, "MmFvDispatchHandler\n"));\r | |
913 | \r | |
914 | CommunicationFvDispatchData = CommBuffer;\r | |
915 | \r | |
916 | DEBUG ((DEBUG_INFO, " Dispatch - 0x%016lx - 0x%016lx\n", CommunicationFvDispatchData->Address,\r | |
917 | CommunicationFvDispatchData->Size));\r | |
918 | \r | |
919 | FwVolHeader = (EFI_FIRMWARE_VOLUME_HEADER *)(UINTN)CommunicationFvDispatchData->Address;\r | |
920 | \r | |
921 | MmCoreFfsFindMmDriver (FwVolHeader);\r | |
922 | \r | |
923 | //\r | |
924 | // Execute the MM Dispatcher on any newly discovered FVs and previously\r | |
925 | // discovered MM drivers that have been discovered but not dispatched.\r | |
926 | //\r | |
927 | Status = MmDispatcher ();\r | |
928 | \r | |
929 | return Status;\r | |
930 | }\r | |
931 | \r | |
932 | /**\r | |
933 | Traverse the discovered list for any drivers that were discovered but not loaded\r | |
934 | because the dependency experessions evaluated to false.\r | |
935 | \r | |
936 | **/\r | |
937 | VOID\r | |
938 | MmDisplayDiscoveredNotDispatched (\r | |
939 | VOID\r | |
940 | )\r | |
941 | {\r | |
942 | LIST_ENTRY *Link;\r | |
943 | EFI_MM_DRIVER_ENTRY *DriverEntry;\r | |
944 | \r | |
945 | for (Link = mDiscoveredList.ForwardLink;Link !=&mDiscoveredList; Link = Link->ForwardLink) {\r | |
946 | DriverEntry = CR (Link, EFI_MM_DRIVER_ENTRY, Link, EFI_MM_DRIVER_ENTRY_SIGNATURE);\r | |
947 | if (DriverEntry->Dependent) {\r | |
948 | DEBUG ((DEBUG_LOAD, "MM Driver %g was discovered but not loaded!!\n", &DriverEntry->FileName));\r | |
949 | }\r | |
950 | }\r | |
951 | }\r |