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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 | |
9cf9de66 | 7 | file exists in the FV those drivers are added to the\r |
7f72ec0b | 8 | mScheduledQueue. The mFwVolList is used to make sure a\r |
6b46d772 SV |
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 | |
da29388b SM |
18 | to the mScheduledQueue checks for Before Depexes and recursively\r |
19 | adds all Before Depexes. It then adds the item that was passed in\r | |
20 | and then processess the After dependencies by recursively calling\r | |
21 | the routine.\r | |
6b46d772 SV |
22 | \r |
23 | Dispatcher Rules:\r | |
24 | The rules for the dispatcher are similar to the DXE dispatcher.\r | |
25 | \r | |
26 | The rules for DXE dispatcher are in chapter 10 of the DXE CIS. Figure 10-3\r | |
27 | is the state diagram for the DXE dispatcher\r | |
28 | \r | |
29 | Depex - Dependency Expresion.\r | |
30 | \r | |
31 | Copyright (c) 2014, Hewlett-Packard Development Company, L.P.\r | |
32 | Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>\r | |
da29388b | 33 | Copyright (c) 2016 - 2021, Arm Limited. All rights reserved.<BR>\r |
6b46d772 | 34 | \r |
86094561 | 35 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
6b46d772 SV |
36 | \r |
37 | **/\r | |
38 | \r | |
39 | #include "StandaloneMmCore.h"\r | |
40 | \r | |
41 | //\r | |
42 | // MM Dispatcher Data structures\r | |
43 | //\r | |
7f72ec0b | 44 | #define KNOWN_FWVOL_SIGNATURE SIGNATURE_32('k','n','o','w')\r |
6b46d772 SV |
45 | \r |
46 | typedef struct {\r | |
7f72ec0b LE |
47 | UINTN Signature;\r |
48 | LIST_ENTRY Link; // mFwVolList\r | |
49 | EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;\r | |
50 | } KNOWN_FWVOL;\r | |
6b46d772 SV |
51 | \r |
52 | //\r | |
53 | // Function Prototypes\r | |
54 | //\r | |
55 | \r | |
56 | EFI_STATUS\r | |
57 | MmCoreFfsFindMmDriver (\r | |
58 | IN EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader\r | |
59 | );\r | |
60 | \r | |
61 | /**\r | |
62 | Insert InsertedDriverEntry onto the mScheduledQueue. To do this you\r | |
63 | must add any driver with a before dependency on InsertedDriverEntry first.\r | |
da29388b SM |
64 | You do this by recursively calling this routine. After all the Before Depexes\r |
65 | are processed you can add InsertedDriverEntry to the mScheduledQueue.\r | |
6b46d772 SV |
66 | Then you can add any driver with an After dependency on InsertedDriverEntry\r |
67 | by recursively calling this routine.\r | |
68 | \r | |
69 | @param InsertedDriverEntry The driver to insert on the ScheduledLink Queue\r | |
70 | \r | |
71 | **/\r | |
72 | VOID\r | |
73 | MmInsertOnScheduledQueueWhileProcessingBeforeAndAfter (\r | |
74 | IN EFI_MM_DRIVER_ENTRY *InsertedDriverEntry\r | |
75 | );\r | |
76 | \r | |
77 | //\r | |
78 | // The Driver List contains one copy of every driver that has been discovered.\r | |
79 | // Items are never removed from the driver list. List of EFI_MM_DRIVER_ENTRY\r | |
80 | //\r | |
81 | LIST_ENTRY mDiscoveredList = INITIALIZE_LIST_HEAD_VARIABLE (mDiscoveredList);\r | |
82 | \r | |
83 | //\r | |
84 | // Queue of drivers that are ready to dispatch. This queue is a subset of the\r | |
85 | // mDiscoveredList.list of EFI_MM_DRIVER_ENTRY.\r | |
86 | //\r | |
87 | LIST_ENTRY mScheduledQueue = INITIALIZE_LIST_HEAD_VARIABLE (mScheduledQueue);\r | |
88 | \r | |
89 | //\r | |
7f72ec0b LE |
90 | // List of firmware volume headers whose containing firmware volumes have been\r |
91 | // parsed and added to the mFwDriverList.\r | |
6b46d772 | 92 | //\r |
7f72ec0b | 93 | LIST_ENTRY mFwVolList = INITIALIZE_LIST_HEAD_VARIABLE (mFwVolList);\r |
6b46d772 SV |
94 | \r |
95 | //\r | |
da29388b | 96 | // Flag for the MM Dispacher. TRUE if dispatcher is executing.\r |
6b46d772 SV |
97 | //\r |
98 | BOOLEAN gDispatcherRunning = FALSE;\r | |
99 | \r | |
100 | //\r | |
101 | // Flag for the MM Dispacher. TRUE if there is one or more MM drivers ready to be dispatched\r | |
102 | //\r | |
103 | BOOLEAN gRequestDispatch = FALSE;\r | |
104 | \r | |
105 | //\r | |
106 | // The global variable is defined for Loading modules at fixed address feature to track the MM code\r | |
107 | // memory range usage. It is a bit mapped array in which every bit indicates the correspoding\r | |
108 | // memory page available or not.\r | |
109 | //\r | |
110 | GLOBAL_REMOVE_IF_UNREFERENCED UINT64 *mMmCodeMemoryRangeUsageBitMap=NULL;\r | |
111 | \r | |
112 | /**\r | |
113 | To check memory usage bit map array to figure out if the memory range in which the image will be loaded\r | |
da29388b | 114 | is available or not. If memory range is avaliable, the function will mark the corresponding bits to 1\r |
6b46d772 SV |
115 | which indicates the memory range is used. The function is only invoked when load modules at fixed address\r |
116 | feature is enabled.\r | |
117 | \r | |
118 | @param ImageBase The base addres the image will be loaded at.\r | |
119 | @param ImageSize The size of the image\r | |
120 | \r | |
121 | @retval EFI_SUCCESS The memory range the image will be loaded in is available\r | |
122 | @retval EFI_NOT_FOUND The memory range the image will be loaded in is not available\r | |
123 | **/\r | |
124 | EFI_STATUS\r | |
125 | CheckAndMarkFixLoadingMemoryUsageBitMap (\r | |
126 | IN EFI_PHYSICAL_ADDRESS ImageBase,\r | |
127 | IN UINTN ImageSize\r | |
128 | )\r | |
129 | {\r | |
130 | UINT32 MmCodePageNumber;\r | |
131 | UINT64 MmCodeSize;\r | |
132 | EFI_PHYSICAL_ADDRESS MmCodeBase;\r | |
133 | UINTN BaseOffsetPageNumber;\r | |
134 | UINTN TopOffsetPageNumber;\r | |
135 | UINTN Index;\r | |
136 | \r | |
137 | //\r | |
138 | // Build tool will calculate the smm code size and then patch the PcdLoadFixAddressMmCodePageNumber\r | |
139 | //\r | |
140 | MmCodePageNumber = 0;\r | |
141 | MmCodeSize = EFI_PAGES_TO_SIZE (MmCodePageNumber);\r | |
142 | MmCodeBase = gLoadModuleAtFixAddressMmramBase;\r | |
143 | \r | |
144 | //\r | |
145 | // If the memory usage bit map is not initialized, do it. Every bit in the array\r | |
146 | // indicate the status of the corresponding memory page, available or not\r | |
147 | //\r | |
148 | if (mMmCodeMemoryRangeUsageBitMap == NULL) {\r | |
149 | mMmCodeMemoryRangeUsageBitMap = AllocateZeroPool (((MmCodePageNumber / 64) + 1) * sizeof (UINT64));\r | |
150 | }\r | |
151 | \r | |
152 | //\r | |
153 | // If the Dxe code memory range is not allocated or the bit map array allocation failed, return EFI_NOT_FOUND\r | |
154 | //\r | |
155 | if (mMmCodeMemoryRangeUsageBitMap == NULL) {\r | |
156 | return EFI_NOT_FOUND;\r | |
157 | }\r | |
158 | \r | |
159 | //\r | |
160 | // see if the memory range for loading the image is in the MM code range.\r | |
161 | //\r | |
162 | if (MmCodeBase + MmCodeSize < ImageBase + ImageSize || MmCodeBase > ImageBase) {\r | |
163 | return EFI_NOT_FOUND;\r | |
164 | }\r | |
165 | \r | |
166 | //\r | |
da29388b | 167 | // Test if the memory is available or not.\r |
6b46d772 SV |
168 | //\r |
169 | BaseOffsetPageNumber = (UINTN)EFI_SIZE_TO_PAGES ((UINT32)(ImageBase - MmCodeBase));\r | |
170 | TopOffsetPageNumber = (UINTN)EFI_SIZE_TO_PAGES ((UINT32)(ImageBase + ImageSize - MmCodeBase));\r | |
171 | for (Index = BaseOffsetPageNumber; Index < TopOffsetPageNumber; Index ++) {\r | |
172 | if ((mMmCodeMemoryRangeUsageBitMap[Index / 64] & LShiftU64 (1, (Index % 64))) != 0) {\r | |
173 | //\r | |
174 | // This page is already used.\r | |
175 | //\r | |
176 | return EFI_NOT_FOUND;\r | |
177 | }\r | |
178 | }\r | |
179 | \r | |
180 | //\r | |
181 | // Being here means the memory range is available. So mark the bits for the memory range\r | |
182 | //\r | |
183 | for (Index = BaseOffsetPageNumber; Index < TopOffsetPageNumber; Index ++) {\r | |
184 | mMmCodeMemoryRangeUsageBitMap[Index / 64] |= LShiftU64 (1, (Index % 64));\r | |
185 | }\r | |
186 | return EFI_SUCCESS;\r | |
187 | }\r | |
188 | \r | |
189 | /**\r | |
190 | Get the fixed loading address from image header assigned by build tool. This function only be called\r | |
191 | when Loading module at Fixed address feature enabled.\r | |
192 | \r | |
193 | @param ImageContext Pointer to the image context structure that describes the PE/COFF\r | |
194 | image that needs to be examined by this function.\r | |
195 | @retval EFI_SUCCESS An fixed loading address is assigned to this image by build tools .\r | |
196 | @retval EFI_NOT_FOUND The image has no assigned fixed loadding address.\r | |
197 | \r | |
198 | **/\r | |
199 | EFI_STATUS\r | |
200 | GetPeCoffImageFixLoadingAssignedAddress(\r | |
201 | IN OUT PE_COFF_LOADER_IMAGE_CONTEXT *ImageContext\r | |
202 | )\r | |
203 | {\r | |
204 | UINTN SectionHeaderOffset;\r | |
205 | EFI_STATUS Status;\r | |
206 | EFI_IMAGE_SECTION_HEADER SectionHeader;\r | |
207 | EFI_IMAGE_OPTIONAL_HEADER_UNION *ImgHdr;\r | |
208 | EFI_PHYSICAL_ADDRESS FixLoadingAddress;\r | |
209 | UINT16 Index;\r | |
210 | UINTN Size;\r | |
211 | UINT16 NumberOfSections;\r | |
212 | UINT64 ValueInSectionHeader;\r | |
213 | \r | |
214 | FixLoadingAddress = 0;\r | |
215 | Status = EFI_NOT_FOUND;\r | |
216 | \r | |
217 | //\r | |
218 | // Get PeHeader pointer\r | |
219 | //\r | |
220 | ImgHdr = (EFI_IMAGE_OPTIONAL_HEADER_UNION *)((CHAR8* )ImageContext->Handle + ImageContext->PeCoffHeaderOffset);\r | |
221 | SectionHeaderOffset = ImageContext->PeCoffHeaderOffset + sizeof (UINT32) + sizeof (EFI_IMAGE_FILE_HEADER) +\r | |
222 | ImgHdr->Pe32.FileHeader.SizeOfOptionalHeader;\r | |
223 | NumberOfSections = ImgHdr->Pe32.FileHeader.NumberOfSections;\r | |
224 | \r | |
225 | //\r | |
226 | // Get base address from the first section header that doesn't point to code section.\r | |
227 | //\r | |
228 | for (Index = 0; Index < NumberOfSections; Index++) {\r | |
229 | //\r | |
230 | // Read section header from file\r | |
231 | //\r | |
232 | Size = sizeof (EFI_IMAGE_SECTION_HEADER);\r | |
233 | Status = ImageContext->ImageRead (\r | |
234 | ImageContext->Handle,\r | |
235 | SectionHeaderOffset,\r | |
236 | &Size,\r | |
237 | &SectionHeader\r | |
238 | );\r | |
239 | if (EFI_ERROR (Status)) {\r | |
240 | return Status;\r | |
241 | }\r | |
242 | \r | |
243 | Status = EFI_NOT_FOUND;\r | |
244 | \r | |
245 | if ((SectionHeader.Characteristics & EFI_IMAGE_SCN_CNT_CODE) == 0) {\r | |
246 | //\r | |
247 | // Build tool will save the address in PointerToRelocations & PointerToLineNumbers fields\r | |
248 | // in the first section header that doesn't point to code section in image header. So there\r | |
249 | // is an assumption that when the feature is enabled, if a module with a loading address\r | |
250 | // assigned by tools, the PointerToRelocations & PointerToLineNumbers fields should not be\r | |
251 | // Zero, or else, these 2 fields should be set to Zero\r | |
252 | //\r | |
253 | ValueInSectionHeader = ReadUnaligned64 ((UINT64*)&SectionHeader.PointerToRelocations);\r | |
254 | if (ValueInSectionHeader != 0) {\r | |
255 | //\r | |
256 | // Found first section header that doesn't point to code section in which build tool saves the\r | |
257 | // offset to SMRAM base as image base in PointerToRelocations & PointerToLineNumbers fields\r | |
258 | //\r | |
259 | FixLoadingAddress = (EFI_PHYSICAL_ADDRESS)(gLoadModuleAtFixAddressMmramBase + (INT64)ValueInSectionHeader);\r | |
260 | //\r | |
261 | // Check if the memory range is available.\r | |
262 | //\r | |
263 | Status = CheckAndMarkFixLoadingMemoryUsageBitMap (FixLoadingAddress, (UINTN)(ImageContext->ImageSize + ImageContext->SectionAlignment));\r | |
264 | if (!EFI_ERROR(Status)) {\r | |
265 | //\r | |
266 | // The assigned address is valid. Return the specified loading address\r | |
267 | //\r | |
268 | ImageContext->ImageAddress = FixLoadingAddress;\r | |
269 | }\r | |
270 | }\r | |
271 | break;\r | |
272 | }\r | |
273 | SectionHeaderOffset += sizeof (EFI_IMAGE_SECTION_HEADER);\r | |
274 | }\r | |
275 | DEBUG ((DEBUG_INFO|DEBUG_LOAD, "LOADING MODULE FIXED INFO: Loading module at fixed address %x, Status = %r\n",\r | |
276 | FixLoadingAddress, Status));\r | |
277 | return Status;\r | |
278 | }\r | |
279 | /**\r | |
280 | Loads an EFI image into SMRAM.\r | |
281 | \r | |
282 | @param DriverEntry EFI_MM_DRIVER_ENTRY instance\r | |
283 | \r | |
284 | @return EFI_STATUS\r | |
285 | \r | |
286 | **/\r | |
287 | EFI_STATUS\r | |
288 | EFIAPI\r | |
289 | MmLoadImage (\r | |
290 | IN OUT EFI_MM_DRIVER_ENTRY *DriverEntry\r | |
291 | )\r | |
292 | {\r | |
6b46d772 SV |
293 | UINTN PageCount;\r |
294 | EFI_STATUS Status;\r | |
295 | EFI_PHYSICAL_ADDRESS DstBuffer;\r | |
296 | PE_COFF_LOADER_IMAGE_CONTEXT ImageContext;\r | |
297 | \r | |
298 | DEBUG ((DEBUG_INFO, "MmLoadImage - %g\n", &DriverEntry->FileName));\r | |
299 | \r | |
6b46d772 SV |
300 | Status = EFI_SUCCESS;\r |
301 | \r | |
302 | //\r | |
303 | // Initialize ImageContext\r | |
304 | //\r | |
877013d0 | 305 | ImageContext.Handle = DriverEntry->Pe32Data;\r |
6b46d772 SV |
306 | ImageContext.ImageRead = PeCoffLoaderImageReadFromMemory;\r |
307 | \r | |
308 | //\r | |
309 | // Get information about the image being loaded\r | |
310 | //\r | |
311 | Status = PeCoffLoaderGetImageInfo (&ImageContext);\r | |
312 | if (EFI_ERROR (Status)) {\r | |
6b46d772 SV |
313 | return Status;\r |
314 | }\r | |
315 | \r | |
316 | PageCount = (UINTN)EFI_SIZE_TO_PAGES ((UINTN)ImageContext.ImageSize + ImageContext.SectionAlignment);\r | |
317 | DstBuffer = (UINTN)(-1);\r | |
318 | \r | |
319 | Status = MmAllocatePages (\r | |
320 | AllocateMaxAddress,\r | |
321 | EfiRuntimeServicesCode,\r | |
322 | PageCount,\r | |
323 | &DstBuffer\r | |
324 | );\r | |
325 | if (EFI_ERROR (Status)) {\r | |
6b46d772 SV |
326 | return Status;\r |
327 | }\r | |
328 | \r | |
329 | ImageContext.ImageAddress = (EFI_PHYSICAL_ADDRESS)DstBuffer;\r | |
330 | \r | |
331 | //\r | |
da29388b | 332 | // Align buffer on section boundary\r |
6b46d772 SV |
333 | //\r |
334 | ImageContext.ImageAddress += ImageContext.SectionAlignment - 1;\r | |
335 | ImageContext.ImageAddress &= ~((EFI_PHYSICAL_ADDRESS)(ImageContext.SectionAlignment - 1));\r | |
336 | \r | |
337 | //\r | |
338 | // Load the image to our new buffer\r | |
339 | //\r | |
340 | Status = PeCoffLoaderLoadImage (&ImageContext);\r | |
341 | if (EFI_ERROR (Status)) {\r | |
6b46d772 SV |
342 | MmFreePages (DstBuffer, PageCount);\r |
343 | return Status;\r | |
344 | }\r | |
345 | \r | |
346 | //\r | |
347 | // Relocate the image in our new buffer\r | |
348 | //\r | |
349 | Status = PeCoffLoaderRelocateImage (&ImageContext);\r | |
350 | if (EFI_ERROR (Status)) {\r | |
6b46d772 SV |
351 | MmFreePages (DstBuffer, PageCount);\r |
352 | return Status;\r | |
353 | }\r | |
354 | \r | |
355 | //\r | |
356 | // Flush the instruction cache so the image data are written before we execute it\r | |
357 | //\r | |
358 | InvalidateInstructionCacheRange ((VOID *)(UINTN) ImageContext.ImageAddress, (UINTN) ImageContext.ImageSize);\r | |
359 | \r | |
360 | //\r | |
361 | // Save Image EntryPoint in DriverEntry\r | |
362 | //\r | |
363 | DriverEntry->ImageEntryPoint = ImageContext.EntryPoint;\r | |
364 | DriverEntry->ImageBuffer = DstBuffer;\r | |
365 | DriverEntry->NumberOfPage = PageCount;\r | |
366 | \r | |
367 | if (mEfiSystemTable != NULL) {\r | |
368 | Status = mEfiSystemTable->BootServices->AllocatePool (\r | |
369 | EfiBootServicesData,\r | |
370 | sizeof (EFI_LOADED_IMAGE_PROTOCOL),\r | |
371 | (VOID **)&DriverEntry->LoadedImage\r | |
372 | );\r | |
373 | if (EFI_ERROR (Status)) {\r | |
6b46d772 SV |
374 | MmFreePages (DstBuffer, PageCount);\r |
375 | return Status;\r | |
376 | }\r | |
377 | \r | |
378 | ZeroMem (DriverEntry->LoadedImage, sizeof (EFI_LOADED_IMAGE_PROTOCOL));\r | |
379 | //\r | |
380 | // Fill in the remaining fields of the Loaded Image Protocol instance.\r | |
381 | // Note: ImageBase is an SMRAM address that can not be accessed outside of SMRAM if SMRAM window is closed.\r | |
382 | //\r | |
383 | DriverEntry->LoadedImage->Revision = EFI_LOADED_IMAGE_PROTOCOL_REVISION;\r | |
384 | DriverEntry->LoadedImage->ParentHandle = NULL;\r | |
385 | DriverEntry->LoadedImage->SystemTable = mEfiSystemTable;\r | |
386 | DriverEntry->LoadedImage->DeviceHandle = NULL;\r | |
387 | DriverEntry->LoadedImage->FilePath = NULL;\r | |
388 | \r | |
389 | DriverEntry->LoadedImage->ImageBase = (VOID *)(UINTN)DriverEntry->ImageBuffer;\r | |
390 | DriverEntry->LoadedImage->ImageSize = ImageContext.ImageSize;\r | |
391 | DriverEntry->LoadedImage->ImageCodeType = EfiRuntimeServicesCode;\r | |
392 | DriverEntry->LoadedImage->ImageDataType = EfiRuntimeServicesData;\r | |
393 | \r | |
394 | //\r | |
395 | // Create a new image handle in the UEFI handle database for the MM Driver\r | |
396 | //\r | |
397 | DriverEntry->ImageHandle = NULL;\r | |
398 | Status = mEfiSystemTable->BootServices->InstallMultipleProtocolInterfaces (\r | |
399 | &DriverEntry->ImageHandle,\r | |
400 | &gEfiLoadedImageProtocolGuid,\r | |
401 | DriverEntry->LoadedImage,\r | |
402 | NULL\r | |
403 | );\r | |
404 | }\r | |
405 | \r | |
406 | //\r | |
407 | // Print the load address and the PDB file name if it is available\r | |
408 | //\r | |
409 | DEBUG_CODE_BEGIN ();\r | |
410 | \r | |
411 | UINTN Index;\r | |
412 | UINTN StartIndex;\r | |
413 | CHAR8 EfiFileName[256];\r | |
414 | \r | |
415 | DEBUG ((DEBUG_INFO | DEBUG_LOAD,\r | |
416 | "Loading MM driver at 0x%11p EntryPoint=0x%11p ",\r | |
417 | (VOID *)(UINTN) ImageContext.ImageAddress,\r | |
418 | FUNCTION_ENTRY_POINT (ImageContext.EntryPoint)));\r | |
419 | \r | |
420 | //\r | |
421 | // Print Module Name by Pdb file path.\r | |
422 | // Windows and Unix style file path are all trimmed correctly.\r | |
423 | //\r | |
424 | if (ImageContext.PdbPointer != NULL) {\r | |
425 | StartIndex = 0;\r | |
426 | for (Index = 0; ImageContext.PdbPointer[Index] != 0; Index++) {\r | |
427 | if ((ImageContext.PdbPointer[Index] == '\\') || (ImageContext.PdbPointer[Index] == '/')) {\r | |
428 | StartIndex = Index + 1;\r | |
429 | }\r | |
430 | }\r | |
431 | \r | |
432 | //\r | |
433 | // Copy the PDB file name to our temporary string, and replace .pdb with .efi\r | |
434 | // The PDB file name is limited in the range of 0~255.\r | |
a57268fe | 435 | // If the length is bigger than 255, trim the redundant characters to avoid overflow in array boundary.\r |
6b46d772 SV |
436 | //\r |
437 | for (Index = 0; Index < sizeof (EfiFileName) - 4; Index++) {\r | |
438 | EfiFileName[Index] = ImageContext.PdbPointer[Index + StartIndex];\r | |
439 | if (EfiFileName[Index] == 0) {\r | |
440 | EfiFileName[Index] = '.';\r | |
441 | }\r | |
442 | if (EfiFileName[Index] == '.') {\r | |
443 | EfiFileName[Index + 1] = 'e';\r | |
444 | EfiFileName[Index + 2] = 'f';\r | |
445 | EfiFileName[Index + 3] = 'i';\r | |
446 | EfiFileName[Index + 4] = 0;\r | |
447 | break;\r | |
448 | }\r | |
449 | }\r | |
450 | \r | |
451 | if (Index == sizeof (EfiFileName) - 4) {\r | |
452 | EfiFileName[Index] = 0;\r | |
453 | }\r | |
454 | DEBUG ((DEBUG_INFO | DEBUG_LOAD, "%a", EfiFileName));\r | |
455 | }\r | |
456 | DEBUG ((DEBUG_INFO | DEBUG_LOAD, "\n"));\r | |
457 | \r | |
458 | DEBUG_CODE_END ();\r | |
459 | \r | |
6b46d772 SV |
460 | return Status;\r |
461 | }\r | |
462 | \r | |
463 | /**\r | |
464 | Preprocess dependency expression and update DriverEntry to reflect the\r | |
465 | state of Before and After dependencies. If DriverEntry->Before\r | |
466 | or DriverEntry->After is set it will never be cleared.\r | |
467 | \r | |
468 | @param DriverEntry DriverEntry element to update .\r | |
469 | \r | |
470 | @retval EFI_SUCCESS It always works.\r | |
471 | \r | |
472 | **/\r | |
473 | EFI_STATUS\r | |
474 | MmPreProcessDepex (\r | |
475 | IN EFI_MM_DRIVER_ENTRY *DriverEntry\r | |
476 | )\r | |
477 | {\r | |
478 | UINT8 *Iterator;\r | |
479 | \r | |
480 | Iterator = DriverEntry->Depex;\r | |
481 | DriverEntry->Dependent = TRUE;\r | |
482 | \r | |
483 | if (*Iterator == EFI_DEP_BEFORE) {\r | |
484 | DriverEntry->Before = TRUE;\r | |
485 | } else if (*Iterator == EFI_DEP_AFTER) {\r | |
486 | DriverEntry->After = TRUE;\r | |
487 | }\r | |
488 | \r | |
489 | if (DriverEntry->Before || DriverEntry->After) {\r | |
490 | CopyMem (&DriverEntry->BeforeAfterGuid, Iterator + 1, sizeof (EFI_GUID));\r | |
491 | }\r | |
492 | \r | |
493 | return EFI_SUCCESS;\r | |
494 | }\r | |
495 | \r | |
496 | /**\r | |
497 | Read Depex and pre-process the Depex for Before and After. If Section Extraction\r | |
498 | protocol returns an error via ReadSection defer the reading of the Depex.\r | |
499 | \r | |
500 | @param DriverEntry Driver to work on.\r | |
501 | \r | |
502 | @retval EFI_SUCCESS Depex read and preprossesed\r | |
503 | @retval EFI_PROTOCOL_ERROR The section extraction protocol returned an error\r | |
504 | and Depex reading needs to be retried.\r | |
505 | @retval Error DEPEX not found.\r | |
506 | \r | |
507 | **/\r | |
508 | EFI_STATUS\r | |
509 | MmGetDepexSectionAndPreProccess (\r | |
510 | IN EFI_MM_DRIVER_ENTRY *DriverEntry\r | |
511 | )\r | |
512 | {\r | |
513 | EFI_STATUS Status;\r | |
514 | \r | |
515 | //\r | |
516 | // Data already read\r | |
517 | //\r | |
518 | if (DriverEntry->Depex == NULL) {\r | |
519 | Status = EFI_NOT_FOUND;\r | |
520 | } else {\r | |
521 | Status = EFI_SUCCESS;\r | |
522 | }\r | |
523 | if (EFI_ERROR (Status)) {\r | |
524 | if (Status == EFI_PROTOCOL_ERROR) {\r | |
525 | //\r | |
526 | // The section extraction protocol failed so set protocol error flag\r | |
527 | //\r | |
528 | DriverEntry->DepexProtocolError = TRUE;\r | |
529 | } else {\r | |
530 | //\r | |
531 | // If no Depex assume depend on all architectural protocols\r | |
532 | //\r | |
533 | DriverEntry->Depex = NULL;\r | |
534 | DriverEntry->Dependent = TRUE;\r | |
535 | DriverEntry->DepexProtocolError = FALSE;\r | |
536 | }\r | |
537 | } else {\r | |
538 | //\r | |
539 | // Set Before and After state information based on Depex\r | |
540 | // Driver will be put in Dependent state\r | |
541 | //\r | |
542 | MmPreProcessDepex (DriverEntry);\r | |
543 | DriverEntry->DepexProtocolError = FALSE;\r | |
544 | }\r | |
545 | \r | |
546 | return Status;\r | |
547 | }\r | |
548 | \r | |
549 | /**\r | |
550 | This is the main Dispatcher for MM and it exits when there are no more\r | |
551 | drivers to run. Drain the mScheduledQueue and load and start a PE\r | |
552 | image for each driver. Search the mDiscoveredList to see if any driver can\r | |
553 | be placed on the mScheduledQueue. If no drivers are placed on the\r | |
554 | mScheduledQueue exit the function.\r | |
555 | \r | |
556 | @retval EFI_SUCCESS All of the MM Drivers that could be dispatched\r | |
557 | have been run and the MM Entry Point has been\r | |
558 | registered.\r | |
559 | @retval EFI_NOT_READY The MM Driver that registered the MM Entry Point\r | |
560 | was just dispatched.\r | |
561 | @retval EFI_NOT_FOUND There are no MM Drivers available to be dispatched.\r | |
562 | @retval EFI_ALREADY_STARTED The MM Dispatcher is already running\r | |
563 | \r | |
564 | **/\r | |
565 | EFI_STATUS\r | |
566 | MmDispatcher (\r | |
567 | VOID\r | |
568 | )\r | |
569 | {\r | |
570 | EFI_STATUS Status;\r | |
571 | LIST_ENTRY *Link;\r | |
572 | EFI_MM_DRIVER_ENTRY *DriverEntry;\r | |
573 | BOOLEAN ReadyToRun;\r | |
6b46d772 SV |
574 | \r |
575 | DEBUG ((DEBUG_INFO, "MmDispatcher\n"));\r | |
576 | \r | |
577 | if (!gRequestDispatch) {\r | |
578 | DEBUG ((DEBUG_INFO, " !gRequestDispatch\n"));\r | |
579 | return EFI_NOT_FOUND;\r | |
580 | }\r | |
581 | \r | |
582 | if (gDispatcherRunning) {\r | |
583 | DEBUG ((DEBUG_INFO, " gDispatcherRunning\n"));\r | |
584 | //\r | |
585 | // If the dispatcher is running don't let it be restarted.\r | |
586 | //\r | |
587 | return EFI_ALREADY_STARTED;\r | |
588 | }\r | |
589 | \r | |
590 | gDispatcherRunning = TRUE;\r | |
591 | \r | |
592 | do {\r | |
593 | //\r | |
594 | // Drain the Scheduled Queue\r | |
595 | //\r | |
596 | DEBUG ((DEBUG_INFO, " Drain the Scheduled Queue\n"));\r | |
597 | while (!IsListEmpty (&mScheduledQueue)) {\r | |
598 | DriverEntry = CR (\r | |
599 | mScheduledQueue.ForwardLink,\r | |
600 | EFI_MM_DRIVER_ENTRY,\r | |
601 | ScheduledLink,\r | |
602 | EFI_MM_DRIVER_ENTRY_SIGNATURE\r | |
603 | );\r | |
604 | DEBUG ((DEBUG_INFO, " DriverEntry (Scheduled) - %g\n", &DriverEntry->FileName));\r | |
605 | \r | |
606 | //\r | |
607 | // Load the MM Driver image into memory. If the Driver was transitioned from\r | |
da29388b | 608 | // Untrusted to Scheduled it would have already been loaded so we may need to\r |
6b46d772 SV |
609 | // skip the LoadImage\r |
610 | //\r | |
611 | if (DriverEntry->ImageHandle == NULL) {\r | |
612 | Status = MmLoadImage (DriverEntry);\r | |
613 | \r | |
614 | //\r | |
615 | // Update the driver state to reflect that it's been loaded\r | |
616 | //\r | |
617 | if (EFI_ERROR (Status)) {\r | |
618 | //\r | |
619 | // The MM Driver could not be loaded, and do not attempt to load or start it again.\r | |
620 | // Take driver from Scheduled to Initialized.\r | |
621 | //\r | |
622 | DriverEntry->Initialized = TRUE;\r | |
623 | DriverEntry->Scheduled = FALSE;\r | |
624 | RemoveEntryList (&DriverEntry->ScheduledLink);\r | |
625 | \r | |
626 | //\r | |
627 | // If it's an error don't try the StartImage\r | |
628 | //\r | |
629 | continue;\r | |
630 | }\r | |
631 | }\r | |
632 | \r | |
633 | DriverEntry->Scheduled = FALSE;\r | |
634 | DriverEntry->Initialized = TRUE;\r | |
635 | RemoveEntryList (&DriverEntry->ScheduledLink);\r | |
636 | \r | |
6b46d772 SV |
637 | //\r |
638 | // For each MM driver, pass NULL as ImageHandle\r | |
639 | //\r | |
640 | if (mEfiSystemTable == NULL) {\r | |
641 | DEBUG ((DEBUG_INFO, "StartImage - 0x%x (Standalone Mode)\n", DriverEntry->ImageEntryPoint));\r | |
642 | Status = ((MM_IMAGE_ENTRY_POINT)(UINTN)DriverEntry->ImageEntryPoint) (DriverEntry->ImageHandle, &gMmCoreMmst);\r | |
643 | } else {\r | |
644 | DEBUG ((DEBUG_INFO, "StartImage - 0x%x (Tradition Mode)\n", DriverEntry->ImageEntryPoint));\r | |
645 | Status = ((EFI_IMAGE_ENTRY_POINT)(UINTN)DriverEntry->ImageEntryPoint) (\r | |
646 | DriverEntry->ImageHandle,\r | |
647 | mEfiSystemTable\r | |
648 | );\r | |
649 | }\r | |
650 | if (EFI_ERROR(Status)) {\r | |
651 | DEBUG ((DEBUG_INFO, "StartImage Status - %r\n", Status));\r | |
652 | MmFreePages(DriverEntry->ImageBuffer, DriverEntry->NumberOfPage);\r | |
653 | }\r | |
6b46d772 SV |
654 | }\r |
655 | \r | |
656 | //\r | |
657 | // Search DriverList for items to place on Scheduled Queue\r | |
658 | //\r | |
659 | DEBUG ((DEBUG_INFO, " Search DriverList for items to place on Scheduled Queue\n"));\r | |
660 | ReadyToRun = FALSE;\r | |
661 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
662 | DriverEntry = CR (Link, EFI_MM_DRIVER_ENTRY, Link, EFI_MM_DRIVER_ENTRY_SIGNATURE);\r | |
663 | DEBUG ((DEBUG_INFO, " DriverEntry (Discovered) - %g\n", &DriverEntry->FileName));\r | |
664 | \r | |
665 | if (DriverEntry->DepexProtocolError) {\r | |
666 | //\r | |
667 | // If Section Extraction Protocol did not let the Depex be read before retry the read\r | |
668 | //\r | |
669 | Status = MmGetDepexSectionAndPreProccess (DriverEntry);\r | |
670 | }\r | |
671 | \r | |
672 | if (DriverEntry->Dependent) {\r | |
673 | if (MmIsSchedulable (DriverEntry)) {\r | |
674 | MmInsertOnScheduledQueueWhileProcessingBeforeAndAfter (DriverEntry);\r | |
675 | ReadyToRun = TRUE;\r | |
676 | }\r | |
677 | }\r | |
678 | }\r | |
679 | } while (ReadyToRun);\r | |
680 | \r | |
681 | //\r | |
682 | // If there is no more MM driver to dispatch, stop the dispatch request\r | |
683 | //\r | |
684 | DEBUG ((DEBUG_INFO, " no more MM driver to dispatch, stop the dispatch request\n"));\r | |
685 | gRequestDispatch = FALSE;\r | |
686 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
687 | DriverEntry = CR (Link, EFI_MM_DRIVER_ENTRY, Link, EFI_MM_DRIVER_ENTRY_SIGNATURE);\r | |
688 | DEBUG ((DEBUG_INFO, " DriverEntry (Discovered) - %g\n", &DriverEntry->FileName));\r | |
689 | \r | |
690 | if (!DriverEntry->Initialized) {\r | |
691 | //\r | |
692 | // We have MM driver pending to dispatch\r | |
693 | //\r | |
694 | gRequestDispatch = TRUE;\r | |
695 | break;\r | |
696 | }\r | |
697 | }\r | |
698 | \r | |
699 | gDispatcherRunning = FALSE;\r | |
700 | \r | |
701 | return EFI_SUCCESS;\r | |
702 | }\r | |
703 | \r | |
704 | /**\r | |
705 | Insert InsertedDriverEntry onto the mScheduledQueue. To do this you\r | |
706 | must add any driver with a before dependency on InsertedDriverEntry first.\r | |
da29388b SM |
707 | You do this by recursively calling this routine. After all the Before Depexes\r |
708 | are processed you can add InsertedDriverEntry to the mScheduledQueue.\r | |
6b46d772 SV |
709 | Then you can add any driver with an After dependency on InsertedDriverEntry\r |
710 | by recursively calling this routine.\r | |
711 | \r | |
712 | @param InsertedDriverEntry The driver to insert on the ScheduledLink Queue\r | |
713 | \r | |
714 | **/\r | |
715 | VOID\r | |
716 | MmInsertOnScheduledQueueWhileProcessingBeforeAndAfter (\r | |
717 | IN EFI_MM_DRIVER_ENTRY *InsertedDriverEntry\r | |
718 | )\r | |
719 | {\r | |
720 | LIST_ENTRY *Link;\r | |
721 | EFI_MM_DRIVER_ENTRY *DriverEntry;\r | |
722 | \r | |
723 | //\r | |
724 | // Process Before Dependency\r | |
725 | //\r | |
726 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
727 | DriverEntry = CR(Link, EFI_MM_DRIVER_ENTRY, Link, EFI_MM_DRIVER_ENTRY_SIGNATURE);\r | |
728 | if (DriverEntry->Before && DriverEntry->Dependent && DriverEntry != InsertedDriverEntry) {\r | |
729 | DEBUG ((DEBUG_DISPATCH, "Evaluate MM DEPEX for FFS(%g)\n", &DriverEntry->FileName));\r | |
730 | DEBUG ((DEBUG_DISPATCH, " BEFORE FFS(%g) = ", &DriverEntry->BeforeAfterGuid));\r | |
731 | if (CompareGuid (&InsertedDriverEntry->FileName, &DriverEntry->BeforeAfterGuid)) {\r | |
732 | //\r | |
733 | // Recursively process BEFORE\r | |
734 | //\r | |
735 | DEBUG ((DEBUG_DISPATCH, "TRUE\n END\n RESULT = TRUE\n"));\r | |
736 | MmInsertOnScheduledQueueWhileProcessingBeforeAndAfter (DriverEntry);\r | |
737 | } else {\r | |
738 | DEBUG ((DEBUG_DISPATCH, "FALSE\n END\n RESULT = FALSE\n"));\r | |
739 | }\r | |
740 | }\r | |
741 | }\r | |
742 | \r | |
743 | //\r | |
744 | // Convert driver from Dependent to Scheduled state\r | |
745 | //\r | |
746 | \r | |
747 | InsertedDriverEntry->Dependent = FALSE;\r | |
748 | InsertedDriverEntry->Scheduled = TRUE;\r | |
749 | InsertTailList (&mScheduledQueue, &InsertedDriverEntry->ScheduledLink);\r | |
750 | \r | |
751 | \r | |
752 | //\r | |
753 | // Process After Dependency\r | |
754 | //\r | |
755 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
756 | DriverEntry = CR(Link, EFI_MM_DRIVER_ENTRY, Link, EFI_MM_DRIVER_ENTRY_SIGNATURE);\r | |
757 | if (DriverEntry->After && DriverEntry->Dependent && DriverEntry != InsertedDriverEntry) {\r | |
758 | DEBUG ((DEBUG_DISPATCH, "Evaluate MM DEPEX for FFS(%g)\n", &DriverEntry->FileName));\r | |
759 | DEBUG ((DEBUG_DISPATCH, " AFTER FFS(%g) = ", &DriverEntry->BeforeAfterGuid));\r | |
760 | if (CompareGuid (&InsertedDriverEntry->FileName, &DriverEntry->BeforeAfterGuid)) {\r | |
761 | //\r | |
762 | // Recursively process AFTER\r | |
763 | //\r | |
764 | DEBUG ((DEBUG_DISPATCH, "TRUE\n END\n RESULT = TRUE\n"));\r | |
765 | MmInsertOnScheduledQueueWhileProcessingBeforeAndAfter (DriverEntry);\r | |
766 | } else {\r | |
767 | DEBUG ((DEBUG_DISPATCH, "FALSE\n END\n RESULT = FALSE\n"));\r | |
768 | }\r | |
769 | }\r | |
770 | }\r | |
771 | }\r | |
772 | \r | |
773 | /**\r | |
7f72ec0b | 774 | Return TRUE if the firmware volume has been processed, FALSE if not.\r |
6b46d772 | 775 | \r |
7f72ec0b LE |
776 | @param FwVolHeader The header of the firmware volume that's being\r |
777 | tested.\r | |
6b46d772 | 778 | \r |
7f72ec0b LE |
779 | @retval TRUE The firmware volume denoted by FwVolHeader has\r |
780 | been processed\r | |
781 | @retval FALSE The firmware volume denoted by FwVolHeader has\r | |
782 | not yet been processed\r | |
6b46d772 SV |
783 | \r |
784 | **/\r | |
785 | BOOLEAN\r | |
786 | FvHasBeenProcessed (\r | |
7f72ec0b | 787 | IN EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader\r |
6b46d772 SV |
788 | )\r |
789 | {\r | |
790 | LIST_ENTRY *Link;\r | |
7f72ec0b | 791 | KNOWN_FWVOL *KnownFwVol;\r |
6b46d772 | 792 | \r |
7f72ec0b LE |
793 | for (Link = mFwVolList.ForwardLink;\r |
794 | Link != &mFwVolList;\r | |
795 | Link = Link->ForwardLink) {\r | |
796 | KnownFwVol = CR (Link, KNOWN_FWVOL, Link, KNOWN_FWVOL_SIGNATURE);\r | |
797 | if (KnownFwVol->FwVolHeader == FwVolHeader) {\r | |
6b46d772 SV |
798 | return TRUE;\r |
799 | }\r | |
800 | }\r | |
801 | return FALSE;\r | |
802 | }\r | |
803 | \r | |
804 | /**\r | |
7f72ec0b LE |
805 | Remember that the firmware volume denoted by FwVolHeader has had its drivers\r |
806 | placed on mDiscoveredList. This function adds entries to mFwVolList. Items\r | |
807 | are never removed/freed from mFwVolList.\r | |
6b46d772 | 808 | \r |
7f72ec0b LE |
809 | @param FwVolHeader The header of the firmware volume that's being\r |
810 | processed.\r | |
6b46d772 SV |
811 | \r |
812 | **/\r | |
813 | VOID\r | |
81e9eca7 | 814 | FvIsBeingProcessed (\r |
7f72ec0b | 815 | IN EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader\r |
6b46d772 SV |
816 | )\r |
817 | {\r | |
7f72ec0b | 818 | KNOWN_FWVOL *KnownFwVol;\r |
6b46d772 | 819 | \r |
bd7c73ba | 820 | DEBUG ((DEBUG_INFO, "FvIsBeingProcessed - 0x%08x\n", FwVolHeader));\r |
6b46d772 | 821 | \r |
7f72ec0b LE |
822 | KnownFwVol = AllocatePool (sizeof (KNOWN_FWVOL));\r |
823 | ASSERT (KnownFwVol != NULL);\r | |
6b46d772 | 824 | \r |
7f72ec0b LE |
825 | KnownFwVol->Signature = KNOWN_FWVOL_SIGNATURE;\r |
826 | KnownFwVol->FwVolHeader = FwVolHeader;\r | |
827 | InsertTailList (&mFwVolList, &KnownFwVol->Link);\r | |
6b46d772 SV |
828 | }\r |
829 | \r | |
830 | /**\r | |
831 | Add an entry to the mDiscoveredList. Allocate memory to store the DriverEntry,\r | |
da29388b | 832 | and initialise any state variables. Read the Depex from the FV and store it\r |
6b46d772 | 833 | in DriverEntry. Pre-process the Depex to set the Before and After state.\r |
da29388b | 834 | The Discovered list is never freed and contains booleans that represent the\r |
6b46d772 SV |
835 | other possible MM driver states.\r |
836 | \r | |
c6fa62aa SM |
837 | @param [in] FwVolHeader Pointer to the formware volume header.\r |
838 | @param [in] Pe32Data Pointer to the PE data.\r | |
839 | @param [in] Pe32DataSize Size of the PE data.\r | |
840 | @param [in] Depex Pointer to the Depex info.\r | |
841 | @param [in] DepexSize Size of the Depex info.\r | |
842 | @param [in] DriverName Name of driver to add to mDiscoveredList.\r | |
6b46d772 SV |
843 | \r |
844 | @retval EFI_SUCCESS If driver was added to the mDiscoveredList.\r | |
6b46d772 SV |
845 | **/\r |
846 | EFI_STATUS\r | |
847 | MmAddToDriverList (\r | |
7f72ec0b LE |
848 | IN EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader,\r |
849 | IN VOID *Pe32Data,\r | |
850 | IN UINTN Pe32DataSize,\r | |
851 | IN VOID *Depex,\r | |
852 | IN UINTN DepexSize,\r | |
853 | IN EFI_GUID *DriverName\r | |
6b46d772 SV |
854 | )\r |
855 | {\r | |
856 | EFI_MM_DRIVER_ENTRY *DriverEntry;\r | |
857 | \r | |
858 | DEBUG ((DEBUG_INFO, "MmAddToDriverList - %g (0x%08x)\n", DriverName, Pe32Data));\r | |
859 | \r | |
860 | //\r | |
861 | // Create the Driver Entry for the list. ZeroPool initializes lots of variables to\r | |
862 | // NULL or FALSE.\r | |
863 | //\r | |
864 | DriverEntry = AllocateZeroPool (sizeof (EFI_MM_DRIVER_ENTRY));\r | |
865 | ASSERT (DriverEntry != NULL);\r | |
866 | \r | |
867 | DriverEntry->Signature = EFI_MM_DRIVER_ENTRY_SIGNATURE;\r | |
868 | CopyGuid (&DriverEntry->FileName, DriverName);\r | |
7f72ec0b | 869 | DriverEntry->FwVolHeader = FwVolHeader;\r |
6b46d772 SV |
870 | DriverEntry->Pe32Data = Pe32Data;\r |
871 | DriverEntry->Pe32DataSize = Pe32DataSize;\r | |
872 | DriverEntry->Depex = Depex;\r | |
873 | DriverEntry->DepexSize = DepexSize;\r | |
874 | \r | |
875 | MmGetDepexSectionAndPreProccess (DriverEntry);\r | |
876 | \r | |
877 | InsertTailList (&mDiscoveredList, &DriverEntry->Link);\r | |
878 | gRequestDispatch = TRUE;\r | |
879 | \r | |
880 | return EFI_SUCCESS;\r | |
881 | }\r | |
882 | \r | |
6b46d772 SV |
883 | /**\r |
884 | Traverse the discovered list for any drivers that were discovered but not loaded\r | |
da29388b | 885 | because the dependency expressions evaluated to false.\r |
6b46d772 SV |
886 | \r |
887 | **/\r | |
888 | VOID\r | |
889 | MmDisplayDiscoveredNotDispatched (\r | |
890 | VOID\r | |
891 | )\r | |
892 | {\r | |
893 | LIST_ENTRY *Link;\r | |
894 | EFI_MM_DRIVER_ENTRY *DriverEntry;\r | |
895 | \r | |
896 | for (Link = mDiscoveredList.ForwardLink;Link !=&mDiscoveredList; Link = Link->ForwardLink) {\r | |
897 | DriverEntry = CR (Link, EFI_MM_DRIVER_ENTRY, Link, EFI_MM_DRIVER_ENTRY_SIGNATURE);\r | |
898 | if (DriverEntry->Dependent) {\r | |
899 | DEBUG ((DEBUG_LOAD, "MM Driver %g was discovered but not loaded!!\n", &DriverEntry->FileName));\r | |
900 | }\r | |
901 | }\r | |
902 | }\r |