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e42e9404 | 1 | /** @file\r |
2 | SMM Driver Dispatcher.\r | |
3 | \r | |
4 | Step #1 - When a FV protocol is added to the system every driver in the FV\r | |
fa542a1e | 5 | is added to the mDiscoveredList. The Before, and After Depex are\r |
e42e9404 | 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 | |
e42e9404 | 29 | \r |
b08b7ba4 | 30 | Copyright (c) 2009 - 2012, Intel Corporation. All rights reserved.<BR>\r |
e42e9404 | 31 | This program and the accompanying materials are licensed and made available \r |
32 | under the terms and conditions of the BSD License which accompanies this \r | |
33 | distribution. The full text of the license may be found at \r | |
34 | http://opensource.org/licenses/bsd-license.php \r | |
35 | \r | |
36 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
37 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
38 | \r | |
39 | **/\r | |
40 | \r | |
41 | #include "PiSmmCore.h"\r | |
42 | \r | |
43 | //\r | |
44 | // SMM Dispatcher Data structures\r | |
45 | //\r | |
46 | #define KNOWN_HANDLE_SIGNATURE SIGNATURE_32('k','n','o','w')\r | |
47 | typedef struct {\r | |
48 | UINTN Signature;\r | |
49 | LIST_ENTRY Link; // mFvHandleList\r | |
50 | EFI_HANDLE Handle;\r | |
51 | } KNOWN_HANDLE;\r | |
52 | \r | |
53 | //\r | |
54 | // Function Prototypes\r | |
55 | //\r | |
56 | \r | |
57 | /**\r | |
58 | Insert InsertedDriverEntry onto the mScheduledQueue. To do this you\r | |
59 | must add any driver with a before dependency on InsertedDriverEntry first.\r | |
60 | You do this by recursively calling this routine. After all the Befores are\r | |
61 | processed you can add InsertedDriverEntry to the mScheduledQueue.\r | |
62 | Then you can add any driver with an After dependency on InsertedDriverEntry\r | |
63 | by recursively calling this routine.\r | |
64 | \r | |
65 | @param InsertedDriverEntry The driver to insert on the ScheduledLink Queue\r | |
66 | \r | |
67 | **/\r | |
68 | VOID\r | |
69 | SmmInsertOnScheduledQueueWhileProcessingBeforeAndAfter (\r | |
70 | IN EFI_SMM_DRIVER_ENTRY *InsertedDriverEntry\r | |
71 | );\r | |
72 | \r | |
73 | //\r | |
74 | // The Driver List contains one copy of every driver that has been discovered.\r | |
75 | // Items are never removed from the driver list. List of EFI_SMM_DRIVER_ENTRY\r | |
76 | //\r | |
77 | LIST_ENTRY mDiscoveredList = INITIALIZE_LIST_HEAD_VARIABLE (mDiscoveredList);\r | |
78 | \r | |
79 | //\r | |
80 | // Queue of drivers that are ready to dispatch. This queue is a subset of the\r | |
81 | // mDiscoveredList.list of EFI_SMM_DRIVER_ENTRY.\r | |
82 | //\r | |
83 | LIST_ENTRY mScheduledQueue = INITIALIZE_LIST_HEAD_VARIABLE (mScheduledQueue);\r | |
84 | \r | |
85 | //\r | |
86 | // List of handles who's Fv's have been parsed and added to the mFwDriverList.\r | |
87 | //\r | |
88 | LIST_ENTRY mFvHandleList = INITIALIZE_LIST_HEAD_VARIABLE (mFvHandleList);\r | |
89 | \r | |
90 | //\r | |
91 | // Flag for the SMM Dispacher. TRUE if dispatcher is execuing.\r | |
92 | //\r | |
93 | BOOLEAN gDispatcherRunning = FALSE;\r | |
94 | \r | |
95 | //\r | |
96 | // Flag for the SMM Dispacher. TRUE if there is one or more SMM drivers ready to be dispatched\r | |
97 | //\r | |
98 | BOOLEAN gRequestDispatch = FALSE;\r | |
99 | \r | |
100 | //\r | |
101 | // List of file types supported by dispatcher\r | |
102 | //\r | |
103 | EFI_FV_FILETYPE mSmmFileTypes[] = {\r | |
104 | EFI_FV_FILETYPE_SMM,\r | |
105 | EFI_FV_FILETYPE_COMBINED_SMM_DXE\r | |
106 | //\r | |
107 | // Note: DXE core will process the FV image file, so skip it in SMM core\r | |
108 | // EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE\r | |
109 | //\r | |
110 | };\r | |
111 | \r | |
112 | typedef struct {\r | |
113 | MEDIA_FW_VOL_FILEPATH_DEVICE_PATH File;\r | |
114 | EFI_DEVICE_PATH_PROTOCOL End;\r | |
115 | } FV_FILEPATH_DEVICE_PATH;\r | |
116 | \r | |
117 | FV_FILEPATH_DEVICE_PATH mFvDevicePath;\r | |
118 | \r | |
119 | //\r | |
120 | // DXE Architecture Protocols\r | |
121 | //\r | |
122 | EFI_SECURITY_ARCH_PROTOCOL *mSecurity = NULL;\r | |
123 | \r | |
3c447c27 | 124 | //\r |
125 | // The global variable is defined for Loading modules at fixed address feature to track the SMM code\r | |
126 | // memory range usage. It is a bit mapped array in which every bit indicates the correspoding \r | |
127 | // memory page available or not. \r | |
128 | //\r | |
129 | GLOBAL_REMOVE_IF_UNREFERENCED UINT64 *mSmmCodeMemoryRangeUsageBitMap=NULL;\r | |
130 | \r | |
131 | /**\r | |
132 | To check memory usage bit map array to figure out if the memory range in which the image will be loaded is available or not. If \r | |
133 | memory range is avaliable, the function will mark the correponding bits to 1 which indicates the memory range is used.\r | |
134 | The function is only invoked when load modules at fixed address feature is enabled. \r | |
135 | \r | |
136 | @param ImageBase The base addres the image will be loaded at.\r | |
137 | @param ImageSize The size of the image\r | |
138 | \r | |
139 | @retval EFI_SUCCESS The memory range the image will be loaded in is available\r | |
140 | @retval EFI_NOT_FOUND The memory range the image will be loaded in is not available\r | |
141 | **/\r | |
142 | EFI_STATUS\r | |
143 | CheckAndMarkFixLoadingMemoryUsageBitMap (\r | |
144 | IN EFI_PHYSICAL_ADDRESS ImageBase,\r | |
145 | IN UINTN ImageSize\r | |
146 | )\r | |
147 | {\r | |
148 | UINT32 SmmCodePageNumber;\r | |
149 | UINT64 SmmCodeSize; \r | |
150 | EFI_PHYSICAL_ADDRESS SmmCodeBase;\r | |
151 | UINTN BaseOffsetPageNumber;\r | |
152 | UINTN TopOffsetPageNumber;\r | |
153 | UINTN Index;\r | |
154 | //\r | |
155 | // Build tool will calculate the smm code size and then patch the PcdLoadFixAddressSmmCodePageNumber\r | |
156 | //\r | |
157 | SmmCodePageNumber = PcdGet32(PcdLoadFixAddressSmmCodePageNumber);\r | |
158 | SmmCodeSize = EFI_PAGES_TO_SIZE (SmmCodePageNumber);\r | |
159 | SmmCodeBase = gLoadModuleAtFixAddressSmramBase;\r | |
160 | \r | |
161 | //\r | |
162 | // If the memory usage bit map is not initialized, do it. Every bit in the array \r | |
163 | // indicate the status of the corresponding memory page, available or not\r | |
164 | // \r | |
165 | if (mSmmCodeMemoryRangeUsageBitMap == NULL) {\r | |
166 | mSmmCodeMemoryRangeUsageBitMap = AllocateZeroPool(((SmmCodePageNumber / 64) + 1)*sizeof(UINT64));\r | |
167 | }\r | |
168 | //\r | |
169 | // If the Dxe code memory range is not allocated or the bit map array allocation failed, return EFI_NOT_FOUND\r | |
170 | //\r | |
171 | if (mSmmCodeMemoryRangeUsageBitMap == NULL) {\r | |
172 | return EFI_NOT_FOUND;\r | |
173 | }\r | |
174 | //\r | |
175 | // see if the memory range for loading the image is in the SMM code range.\r | |
176 | //\r | |
177 | if (SmmCodeBase + SmmCodeSize < ImageBase + ImageSize || SmmCodeBase > ImageBase) {\r | |
178 | return EFI_NOT_FOUND; \r | |
179 | } \r | |
180 | //\r | |
181 | // Test if the memory is avalaible or not.\r | |
182 | // \r | |
183 | BaseOffsetPageNumber = (UINTN)EFI_SIZE_TO_PAGES((UINT32)(ImageBase - SmmCodeBase));\r | |
184 | TopOffsetPageNumber = (UINTN)EFI_SIZE_TO_PAGES((UINT32)(ImageBase + ImageSize - SmmCodeBase));\r | |
185 | for (Index = BaseOffsetPageNumber; Index < TopOffsetPageNumber; Index ++) {\r | |
186 | if ((mSmmCodeMemoryRangeUsageBitMap[Index / 64] & LShiftU64(1, (Index % 64))) != 0) {\r | |
187 | //\r | |
188 | // This page is already used.\r | |
189 | //\r | |
190 | return EFI_NOT_FOUND; \r | |
191 | }\r | |
192 | }\r | |
193 | \r | |
194 | //\r | |
195 | // Being here means the memory range is available. So mark the bits for the memory range\r | |
196 | // \r | |
197 | for (Index = BaseOffsetPageNumber; Index < TopOffsetPageNumber; Index ++) {\r | |
198 | mSmmCodeMemoryRangeUsageBitMap[Index / 64] |= LShiftU64(1, (Index % 64));\r | |
199 | }\r | |
200 | return EFI_SUCCESS; \r | |
201 | }\r | |
202 | /**\r | |
203 | Get the fixed loadding address from image header assigned by build tool. This function only be called \r | |
204 | when Loading module at Fixed address feature enabled.\r | |
205 | \r | |
206 | @param ImageContext Pointer to the image context structure that describes the PE/COFF\r | |
207 | image that needs to be examined by this function.\r | |
208 | @retval EFI_SUCCESS An fixed loading address is assigned to this image by build tools .\r | |
209 | @retval EFI_NOT_FOUND The image has no assigned fixed loadding address.\r | |
210 | \r | |
211 | **/\r | |
212 | EFI_STATUS\r | |
213 | GetPeCoffImageFixLoadingAssignedAddress(\r | |
214 | IN OUT PE_COFF_LOADER_IMAGE_CONTEXT *ImageContext\r | |
215 | )\r | |
216 | {\r | |
217 | UINTN SectionHeaderOffset;\r | |
218 | EFI_STATUS Status;\r | |
219 | EFI_IMAGE_SECTION_HEADER SectionHeader;\r | |
220 | EFI_IMAGE_OPTIONAL_HEADER_UNION *ImgHdr;\r | |
221 | EFI_PHYSICAL_ADDRESS FixLoaddingAddress;\r | |
222 | UINT16 Index;\r | |
223 | UINTN Size; \r | |
224 | UINT16 NumberOfSections;\r | |
225 | UINT64 ValueInSectionHeader;\r | |
226 | \r | |
227 | FixLoaddingAddress = 0;\r | |
228 | Status = EFI_NOT_FOUND;\r | |
229 | \r | |
230 | //\r | |
231 | // Get PeHeader pointer\r | |
232 | //\r | |
233 | ImgHdr = (EFI_IMAGE_OPTIONAL_HEADER_UNION *)((CHAR8* )ImageContext->Handle + ImageContext->PeCoffHeaderOffset);\r | |
234 | SectionHeaderOffset = (UINTN)(\r | |
235 | ImageContext->PeCoffHeaderOffset +\r | |
236 | sizeof (UINT32) +\r | |
237 | sizeof (EFI_IMAGE_FILE_HEADER) +\r | |
238 | ImgHdr->Pe32.FileHeader.SizeOfOptionalHeader\r | |
239 | );\r | |
240 | NumberOfSections = ImgHdr->Pe32.FileHeader.NumberOfSections;\r | |
241 | \r | |
242 | //\r | |
243 | // Get base address from the first section header that doesn't point to code section.\r | |
244 | //\r | |
245 | for (Index = 0; Index < NumberOfSections; Index++) {\r | |
246 | //\r | |
247 | // Read section header from file\r | |
248 | //\r | |
249 | Size = sizeof (EFI_IMAGE_SECTION_HEADER);\r | |
250 | Status = ImageContext->ImageRead (\r | |
251 | ImageContext->Handle,\r | |
252 | SectionHeaderOffset,\r | |
253 | &Size,\r | |
254 | &SectionHeader\r | |
255 | );\r | |
256 | if (EFI_ERROR (Status)) {\r | |
257 | return Status;\r | |
258 | }\r | |
259 | \r | |
260 | Status = EFI_NOT_FOUND;\r | |
261 | \r | |
262 | if ((SectionHeader.Characteristics & EFI_IMAGE_SCN_CNT_CODE) == 0) {\r | |
263 | //\r | |
264 | // Build tool will save the address in PointerToRelocations & PointerToLineNumbers fields in the first section header \r | |
265 | // that doesn't point to code section in image header.So there is an assumption that when the feature is enabled,\r | |
266 | // if a module with a loading address assigned by tools, the PointerToRelocations & PointerToLineNumbers fields\r | |
267 | // should not be Zero, or else, these 2 fileds should be set to Zero\r | |
268 | //\r | |
269 | ValueInSectionHeader = ReadUnaligned64((UINT64*)&SectionHeader.PointerToRelocations);\r | |
270 | if (ValueInSectionHeader != 0) {\r | |
271 | //\r | |
272 | // Found first section header that doesn't point to code section in which uild tool saves the\r | |
273 | // offset to SMRAM base as image base in PointerToRelocations & PointerToLineNumbers fields\r | |
274 | // \r | |
275 | FixLoaddingAddress = (EFI_PHYSICAL_ADDRESS)(gLoadModuleAtFixAddressSmramBase + (INT64)ValueInSectionHeader);\r | |
276 | //\r | |
277 | // Check if the memory range is avaliable.\r | |
278 | //\r | |
279 | Status = CheckAndMarkFixLoadingMemoryUsageBitMap (FixLoaddingAddress, (UINTN)(ImageContext->ImageSize + ImageContext->SectionAlignment));\r | |
280 | if (!EFI_ERROR(Status)) {\r | |
281 | //\r | |
282 | // The assigned address is valid. Return the specified loadding address\r | |
283 | //\r | |
284 | ImageContext->ImageAddress = FixLoaddingAddress;\r | |
285 | }\r | |
286 | }\r | |
287 | break; \r | |
288 | }\r | |
289 | SectionHeaderOffset += sizeof (EFI_IMAGE_SECTION_HEADER); \r | |
290 | }\r | |
291 | DEBUG ((EFI_D_INFO|EFI_D_LOAD, "LOADING MODULE FIXED INFO: Loading module at fixed address %x, Status = %r\n", FixLoaddingAddress, Status));\r | |
292 | return Status;\r | |
293 | }\r | |
e42e9404 | 294 | /**\r |
295 | Loads an EFI image into SMRAM.\r | |
296 | \r | |
297 | @param DriverEntry EFI_SMM_DRIVER_ENTRY instance\r | |
298 | \r | |
299 | @return EFI_STATUS\r | |
300 | \r | |
301 | **/\r | |
302 | EFI_STATUS\r | |
303 | EFIAPI\r | |
304 | SmmLoadImage (\r | |
305 | IN OUT EFI_SMM_DRIVER_ENTRY *DriverEntry\r | |
306 | )\r | |
307 | {\r | |
308 | UINT32 AuthenticationStatus;\r | |
309 | UINTN FilePathSize;\r | |
310 | VOID *Buffer;\r | |
311 | UINTN Size;\r | |
312 | UINTN PageCount;\r | |
313 | EFI_GUID *NameGuid;\r | |
314 | EFI_STATUS Status;\r | |
315 | EFI_STATUS SecurityStatus;\r | |
316 | EFI_HANDLE DeviceHandle;\r | |
317 | EFI_PHYSICAL_ADDRESS DstBuffer;\r | |
318 | EFI_DEVICE_PATH_PROTOCOL *FilePath;\r | |
319 | EFI_DEVICE_PATH_PROTOCOL *OriginalFilePath;\r | |
320 | EFI_DEVICE_PATH_PROTOCOL *HandleFilePath;\r | |
321 | EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv;\r | |
322 | PE_COFF_LOADER_IMAGE_CONTEXT ImageContext;\r | |
c2cb08df LG |
323 | UINT64 Tick;\r |
324 | \r | |
325 | Tick = 0;\r | |
326 | PERF_CODE (\r | |
327 | Tick = GetPerformanceCounter ();\r | |
328 | );\r | |
e42e9404 | 329 | \r |
330 | Buffer = NULL;\r | |
331 | Size = 0;\r | |
332 | Fv = DriverEntry->Fv;\r | |
333 | NameGuid = &DriverEntry->FileName;\r | |
334 | FilePath = DriverEntry->FvFileDevicePath;\r | |
335 | \r | |
336 | OriginalFilePath = FilePath;\r | |
337 | HandleFilePath = FilePath;\r | |
338 | DeviceHandle = NULL;\r | |
339 | SecurityStatus = EFI_SUCCESS;\r | |
340 | Status = EFI_SUCCESS;\r | |
341 | AuthenticationStatus = 0;\r | |
342 | \r | |
343 | //\r | |
344 | // Try to get the image device handle by checking the match protocol.\r | |
345 | //\r | |
346 | Status = gBS->LocateDevicePath (&gEfiFirmwareVolume2ProtocolGuid, &HandleFilePath, &DeviceHandle);\r | |
347 | if (EFI_ERROR(Status)) {\r | |
348 | return Status;\r | |
349 | }\r | |
350 | \r | |
351 | //\r | |
352 | // If the Security Architectural Protocol has not been located yet, then attempt to locate it\r | |
353 | //\r | |
354 | if (mSecurity == NULL) {\r | |
355 | gBS->LocateProtocol (&gEfiSecurityArchProtocolGuid, NULL, (VOID**)&mSecurity);\r | |
356 | }\r | |
357 | \r | |
358 | //\r | |
359 | // Verify the Authentication Status through the Security Architectural Protocol\r | |
360 | //\r | |
361 | if ((mSecurity != NULL) && (OriginalFilePath != NULL)) {\r | |
362 | SecurityStatus = mSecurity->FileAuthenticationState (\r | |
363 | mSecurity,\r | |
364 | AuthenticationStatus,\r | |
365 | OriginalFilePath\r | |
366 | );\r | |
367 | if (EFI_ERROR (SecurityStatus) && SecurityStatus != EFI_SECURITY_VIOLATION) {\r | |
368 | Status = SecurityStatus;\r | |
369 | return Status;\r | |
370 | }\r | |
371 | }\r | |
372 | \r | |
373 | //\r | |
374 | // Pull out just the file portion of the DevicePath for the LoadedImage FilePath\r | |
375 | //\r | |
376 | FilePath = OriginalFilePath;\r | |
377 | Status = gBS->HandleProtocol (DeviceHandle, &gEfiDevicePathProtocolGuid, (VOID **)&HandleFilePath);\r | |
378 | if (!EFI_ERROR (Status)) {\r | |
379 | FilePathSize = GetDevicePathSize (HandleFilePath) - sizeof(EFI_DEVICE_PATH_PROTOCOL);\r | |
380 | FilePath = (EFI_DEVICE_PATH_PROTOCOL *) (((UINT8 *)FilePath) + FilePathSize );\r | |
381 | }\r | |
382 | \r | |
383 | //\r | |
384 | // Try reading PE32 section firstly\r | |
385 | //\r | |
386 | Status = Fv->ReadSection (\r | |
387 | Fv,\r | |
388 | NameGuid,\r | |
389 | EFI_SECTION_PE32,\r | |
390 | 0,\r | |
391 | &Buffer,\r | |
392 | &Size,\r | |
393 | &AuthenticationStatus\r | |
394 | );\r | |
395 | \r | |
396 | if (EFI_ERROR (Status)) {\r | |
397 | //\r | |
398 | // Try reading TE section secondly\r | |
399 | //\r | |
400 | Buffer = NULL;\r | |
401 | Size = 0;\r | |
402 | Status = Fv->ReadSection (\r | |
403 | Fv,\r | |
404 | NameGuid,\r | |
405 | EFI_SECTION_TE,\r | |
406 | 0,\r | |
407 | &Buffer,\r | |
408 | &Size,\r | |
409 | &AuthenticationStatus\r | |
410 | );\r | |
411 | }\r | |
412 | \r | |
413 | if (EFI_ERROR (Status)) {\r | |
414 | if (Buffer != NULL) {\r | |
b08b7ba4 | 415 | gBS->FreePool (Buffer);\r |
e42e9404 | 416 | }\r |
417 | return Status;\r | |
418 | }\r | |
419 | \r | |
420 | //\r | |
421 | // Initialize ImageContext\r | |
422 | //\r | |
423 | ImageContext.Handle = Buffer;\r | |
424 | ImageContext.ImageRead = PeCoffLoaderImageReadFromMemory;\r | |
425 | \r | |
426 | //\r | |
427 | // Get information about the image being loaded\r | |
428 | //\r | |
429 | Status = PeCoffLoaderGetImageInfo (&ImageContext);\r | |
430 | if (EFI_ERROR (Status)) {\r | |
431 | if (Buffer != NULL) {\r | |
b08b7ba4 | 432 | gBS->FreePool (Buffer);\r |
e42e9404 | 433 | }\r |
434 | return Status;\r | |
435 | }\r | |
3c447c27 | 436 | //\r |
437 | // if Loading module at Fixed Address feature is enabled, then cut out a memory range started from TESG BASE\r | |
438 | // to hold the Smm driver code\r | |
439 | //\r | |
440 | if (PcdGet64(PcdLoadModuleAtFixAddressEnable) != 0) {\r | |
441 | //\r | |
442 | // Get the fixed loading address assigned by Build tool\r | |
443 | //\r | |
444 | Status = GetPeCoffImageFixLoadingAssignedAddress (&ImageContext);\r | |
445 | if (!EFI_ERROR (Status)) {\r | |
446 | //\r | |
447 | // Since the memory range to load Smm core alreay been cut out, so no need to allocate and free this range\r | |
448 | // following statements is to bypass SmmFreePages\r | |
449 | //\r | |
450 | PageCount = 0;\r | |
451 | DstBuffer = (UINTN)gLoadModuleAtFixAddressSmramBase; \r | |
452 | } else {\r | |
453 | DEBUG ((EFI_D_INFO|EFI_D_LOAD, "LOADING MODULE FIXED ERROR: Failed to load module at fixed address. \n"));\r | |
454 | //\r | |
455 | // allocate the memory to load the SMM driver\r | |
456 | //\r | |
e0e7f80c | 457 | PageCount = (UINTN)EFI_SIZE_TO_PAGES((UINTN)ImageContext.ImageSize + ImageContext.SectionAlignment);\r |
3c447c27 | 458 | DstBuffer = (UINTN)(-1);\r |
459 | \r | |
460 | Status = SmmAllocatePages (\r | |
461 | AllocateMaxAddress,\r | |
462 | EfiRuntimeServicesCode,\r | |
463 | PageCount,\r | |
464 | &DstBuffer\r | |
465 | );\r | |
466 | if (EFI_ERROR (Status)) {\r | |
467 | if (Buffer != NULL) {\r | |
b08b7ba4 | 468 | gBS->FreePool (Buffer);\r |
3c447c27 | 469 | } \r |
470 | return Status;\r | |
471 | } \r | |
472 | ImageContext.ImageAddress = (EFI_PHYSICAL_ADDRESS)DstBuffer;\r | |
e42e9404 | 473 | }\r |
3c447c27 | 474 | } else {\r |
e0e7f80c | 475 | PageCount = (UINTN)EFI_SIZE_TO_PAGES((UINTN)ImageContext.ImageSize + ImageContext.SectionAlignment);\r |
3c447c27 | 476 | DstBuffer = (UINTN)(-1);\r |
477 | \r | |
478 | Status = SmmAllocatePages (\r | |
479 | AllocateMaxAddress,\r | |
480 | EfiRuntimeServicesCode,\r | |
481 | PageCount,\r | |
482 | &DstBuffer\r | |
483 | );\r | |
484 | if (EFI_ERROR (Status)) {\r | |
485 | if (Buffer != NULL) {\r | |
b08b7ba4 | 486 | gBS->FreePool (Buffer);\r |
3c447c27 | 487 | }\r |
488 | return Status;\r | |
489 | }\r | |
490 | \r | |
491 | ImageContext.ImageAddress = (EFI_PHYSICAL_ADDRESS)DstBuffer;\r | |
e42e9404 | 492 | }\r |
e42e9404 | 493 | //\r |
494 | // Align buffer on section boundry\r | |
495 | //\r | |
496 | ImageContext.ImageAddress += ImageContext.SectionAlignment - 1;\r | |
497 | ImageContext.ImageAddress &= ~(ImageContext.SectionAlignment - 1);\r | |
498 | \r | |
499 | //\r | |
500 | // Load the image to our new buffer\r | |
501 | //\r | |
502 | Status = PeCoffLoaderLoadImage (&ImageContext);\r | |
503 | if (EFI_ERROR (Status)) {\r | |
504 | if (Buffer != NULL) {\r | |
b08b7ba4 | 505 | gBS->FreePool (Buffer);\r |
e42e9404 | 506 | }\r |
507 | SmmFreePages (DstBuffer, PageCount);\r | |
508 | return Status;\r | |
509 | }\r | |
510 | \r | |
511 | //\r | |
512 | // Relocate the image in our new buffer\r | |
513 | //\r | |
514 | Status = PeCoffLoaderRelocateImage (&ImageContext);\r | |
515 | if (EFI_ERROR (Status)) {\r | |
516 | if (Buffer != NULL) {\r | |
b08b7ba4 | 517 | gBS->FreePool (Buffer);\r |
e42e9404 | 518 | }\r |
519 | SmmFreePages (DstBuffer, PageCount);\r | |
520 | return Status;\r | |
521 | }\r | |
522 | \r | |
523 | //\r | |
524 | // Flush the instruction cache so the image data are written before we execute it\r | |
525 | //\r | |
526 | InvalidateInstructionCacheRange ((VOID *)(UINTN) ImageContext.ImageAddress, (UINTN) ImageContext.ImageSize);\r | |
527 | \r | |
528 | //\r | |
529 | // Save Image EntryPoint in DriverEntry\r | |
530 | //\r | |
531 | DriverEntry->ImageEntryPoint = ImageContext.EntryPoint;\r | |
532 | DriverEntry->ImageBuffer = DstBuffer; \r | |
533 | DriverEntry->NumberOfPage = PageCount;\r | |
534 | \r | |
535 | //\r | |
536 | // Allocate a Loaded Image Protocol in EfiBootServicesData\r | |
537 | //\r | |
538 | Status = gBS->AllocatePool (EfiBootServicesData, sizeof (EFI_LOADED_IMAGE_PROTOCOL), (VOID **)&DriverEntry->LoadedImage);\r | |
539 | if (EFI_ERROR (Status)) {\r | |
540 | if (Buffer != NULL) {\r | |
b08b7ba4 | 541 | gBS->FreePool (Buffer);\r |
e42e9404 | 542 | }\r |
543 | SmmFreePages (DstBuffer, PageCount);\r | |
544 | return Status;\r | |
545 | }\r | |
546 | \r | |
547 | //\r | |
548 | // Fill in the remaining fields of the Loaded Image Protocol instance.\r | |
549 | // Note: ImageBase is an SMRAM address that can not be accessed outside of SMRAM if SMRAM window is closed.\r | |
550 | //\r | |
551 | DriverEntry->LoadedImage->Revision = EFI_LOADED_IMAGE_PROTOCOL_REVISION;\r | |
552 | DriverEntry->LoadedImage->ParentHandle = gSmmCorePrivate->SmmIplImageHandle;\r | |
553 | DriverEntry->LoadedImage->SystemTable = gST;\r | |
554 | DriverEntry->LoadedImage->DeviceHandle = DeviceHandle;\r | |
555 | \r | |
556 | //\r | |
557 | // Make an EfiBootServicesData buffer copy of FilePath\r | |
558 | //\r | |
559 | Status = gBS->AllocatePool (EfiBootServicesData, GetDevicePathSize (FilePath), (VOID **)&DriverEntry->LoadedImage->FilePath);\r | |
560 | if (EFI_ERROR (Status)) {\r | |
561 | if (Buffer != NULL) {\r | |
b08b7ba4 | 562 | gBS->FreePool (Buffer);\r |
e42e9404 | 563 | }\r |
564 | SmmFreePages (DstBuffer, PageCount);\r | |
565 | return Status;\r | |
566 | }\r | |
567 | CopyMem (DriverEntry->LoadedImage->FilePath, FilePath, GetDevicePathSize (FilePath));\r | |
568 | \r | |
569 | DriverEntry->LoadedImage->ImageBase = (VOID *)(UINTN)DriverEntry->ImageBuffer;\r | |
570 | DriverEntry->LoadedImage->ImageSize = ImageContext.ImageSize;\r | |
571 | DriverEntry->LoadedImage->ImageCodeType = EfiRuntimeServicesCode;\r | |
572 | DriverEntry->LoadedImage->ImageDataType = EfiRuntimeServicesData;\r | |
573 | \r | |
574 | //\r | |
575 | // Create a new image handle in the UEFI handle database for the SMM Driver\r | |
576 | //\r | |
577 | DriverEntry->ImageHandle = NULL;\r | |
578 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
579 | &DriverEntry->ImageHandle,\r | |
580 | &gEfiLoadedImageProtocolGuid, DriverEntry->LoadedImage,\r | |
581 | NULL\r | |
582 | );\r | |
583 | \r | |
c2cb08df LG |
584 | PERF_START (DriverEntry->ImageHandle, "LoadImage:", NULL, Tick);\r |
585 | PERF_END (DriverEntry->ImageHandle, "LoadImage:", NULL, 0);\r | |
586 | \r | |
e42e9404 | 587 | //\r |
588 | // Print the load address and the PDB file name if it is available\r | |
589 | //\r | |
590 | \r | |
591 | DEBUG_CODE_BEGIN ();\r | |
592 | \r | |
593 | UINTN Index;\r | |
594 | UINTN StartIndex;\r | |
595 | CHAR8 EfiFileName[256];\r | |
596 | \r | |
597 | \r | |
598 | DEBUG ((DEBUG_INFO | DEBUG_LOAD,\r | |
9a33a65e | 599 | "Loading SMM driver at 0x%11p EntryPoint=0x%11p ",\r |
e42e9404 | 600 | (VOID *)(UINTN) ImageContext.ImageAddress,\r |
601 | FUNCTION_ENTRY_POINT (ImageContext.EntryPoint)));\r | |
602 | \r | |
603 | \r | |
604 | //\r | |
605 | // Print Module Name by Pdb file path.\r | |
606 | // Windows and Unix style file path are all trimmed correctly.\r | |
607 | //\r | |
608 | if (ImageContext.PdbPointer != NULL) {\r | |
609 | StartIndex = 0;\r | |
610 | for (Index = 0; ImageContext.PdbPointer[Index] != 0; Index++) {\r | |
611 | if ((ImageContext.PdbPointer[Index] == '\\') || (ImageContext.PdbPointer[Index] == '/')) {\r | |
612 | StartIndex = Index + 1;\r | |
613 | }\r | |
614 | }\r | |
615 | //\r | |
616 | // Copy the PDB file name to our temporary string, and replace .pdb with .efi\r | |
617 | // The PDB file name is limited in the range of 0~255.\r | |
618 | // If the length is bigger than 255, trim the redudant characters to avoid overflow in array boundary.\r | |
619 | //\r | |
620 | for (Index = 0; Index < sizeof (EfiFileName) - 4; Index++) {\r | |
621 | EfiFileName[Index] = ImageContext.PdbPointer[Index + StartIndex];\r | |
622 | if (EfiFileName[Index] == 0) {\r | |
623 | EfiFileName[Index] = '.';\r | |
624 | }\r | |
625 | if (EfiFileName[Index] == '.') {\r | |
626 | EfiFileName[Index + 1] = 'e';\r | |
627 | EfiFileName[Index + 2] = 'f';\r | |
628 | EfiFileName[Index + 3] = 'i';\r | |
629 | EfiFileName[Index + 4] = 0;\r | |
630 | break;\r | |
631 | }\r | |
632 | }\r | |
633 | \r | |
634 | if (Index == sizeof (EfiFileName) - 4) {\r | |
635 | EfiFileName[Index] = 0;\r | |
636 | }\r | |
637 | DEBUG ((DEBUG_INFO | DEBUG_LOAD, "%a", EfiFileName)); // &Image->ImageContext.PdbPointer[StartIndex]));\r | |
638 | }\r | |
639 | DEBUG ((DEBUG_INFO | DEBUG_LOAD, "\n"));\r | |
640 | \r | |
641 | DEBUG_CODE_END ();\r | |
642 | \r | |
643 | //\r | |
644 | // Free buffer allocated by Fv->ReadSection.\r | |
645 | //\r | |
646 | // The UEFI Boot Services FreePool() function must be used because Fv->ReadSection \r | |
647 | // used the UEFI Boot Services AllocatePool() function\r | |
648 | //\r | |
649 | Status = gBS->FreePool(Buffer);\r | |
650 | return Status; \r | |
651 | }\r | |
652 | \r | |
653 | /**\r | |
654 | Preprocess dependency expression and update DriverEntry to reflect the\r | |
fa542a1e | 655 | state of Before and After dependencies. If DriverEntry->Before\r |
656 | or DriverEntry->After is set it will never be cleared. \r | |
e42e9404 | 657 | \r |
658 | @param DriverEntry DriverEntry element to update .\r | |
659 | \r | |
660 | @retval EFI_SUCCESS It always works.\r | |
661 | \r | |
662 | **/\r | |
663 | EFI_STATUS\r | |
664 | SmmPreProcessDepex (\r | |
665 | IN EFI_SMM_DRIVER_ENTRY *DriverEntry\r | |
666 | )\r | |
667 | {\r | |
668 | UINT8 *Iterator;\r | |
669 | \r | |
670 | Iterator = DriverEntry->Depex;\r | |
fa542a1e | 671 | DriverEntry->Dependent = TRUE;\r |
e42e9404 | 672 | \r |
673 | if (*Iterator == EFI_DEP_BEFORE) {\r | |
674 | DriverEntry->Before = TRUE;\r | |
675 | } else if (*Iterator == EFI_DEP_AFTER) {\r | |
676 | DriverEntry->After = TRUE;\r | |
677 | }\r | |
678 | \r | |
679 | if (DriverEntry->Before || DriverEntry->After) {\r | |
680 | CopyMem (&DriverEntry->BeforeAfterGuid, Iterator + 1, sizeof (EFI_GUID));\r | |
681 | }\r | |
682 | \r | |
683 | return EFI_SUCCESS;\r | |
684 | }\r | |
685 | \r | |
686 | /**\r | |
687 | Read Depex and pre-process the Depex for Before and After. If Section Extraction\r | |
688 | protocol returns an error via ReadSection defer the reading of the Depex.\r | |
689 | \r | |
690 | @param DriverEntry Driver to work on.\r | |
691 | \r | |
692 | @retval EFI_SUCCESS Depex read and preprossesed\r | |
693 | @retval EFI_PROTOCOL_ERROR The section extraction protocol returned an error\r | |
694 | and Depex reading needs to be retried.\r | |
695 | @retval Error DEPEX not found.\r | |
696 | \r | |
697 | **/\r | |
698 | EFI_STATUS\r | |
699 | SmmGetDepexSectionAndPreProccess (\r | |
700 | IN EFI_SMM_DRIVER_ENTRY *DriverEntry\r | |
701 | )\r | |
702 | {\r | |
703 | EFI_STATUS Status;\r | |
704 | EFI_SECTION_TYPE SectionType;\r | |
705 | UINT32 AuthenticationStatus;\r | |
706 | EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv;\r | |
707 | \r | |
708 | Fv = DriverEntry->Fv;\r | |
709 | \r | |
710 | //\r | |
711 | // Grab Depex info, it will never be free'ed.\r | |
712 | // (Note: DriverEntry->Depex is in DXE memory)\r | |
713 | //\r | |
714 | SectionType = EFI_SECTION_SMM_DEPEX;\r | |
715 | Status = Fv->ReadSection (\r | |
716 | DriverEntry->Fv,\r | |
717 | &DriverEntry->FileName,\r | |
718 | SectionType,\r | |
719 | 0,\r | |
720 | &DriverEntry->Depex,\r | |
721 | (UINTN *)&DriverEntry->DepexSize,\r | |
722 | &AuthenticationStatus\r | |
723 | );\r | |
724 | if (EFI_ERROR (Status)) {\r | |
725 | if (Status == EFI_PROTOCOL_ERROR) {\r | |
726 | //\r | |
727 | // The section extraction protocol failed so set protocol error flag\r | |
728 | //\r | |
729 | DriverEntry->DepexProtocolError = TRUE;\r | |
730 | } else {\r | |
731 | //\r | |
732 | // If no Depex assume depend on all architectural protocols\r | |
733 | //\r | |
734 | DriverEntry->Depex = NULL;\r | |
735 | DriverEntry->Dependent = TRUE;\r | |
736 | DriverEntry->DepexProtocolError = FALSE;\r | |
737 | }\r | |
738 | } else {\r | |
739 | //\r | |
fa542a1e | 740 | // Set Before and After state information based on Depex\r |
741 | // Driver will be put in Dependent state\r | |
e42e9404 | 742 | //\r |
743 | SmmPreProcessDepex (DriverEntry);\r | |
744 | DriverEntry->DepexProtocolError = FALSE;\r | |
745 | }\r | |
746 | \r | |
747 | return Status;\r | |
748 | }\r | |
749 | \r | |
e42e9404 | 750 | /**\r |
751 | This is the main Dispatcher for SMM and it exits when there are no more\r | |
752 | drivers to run. Drain the mScheduledQueue and load and start a PE\r | |
753 | image for each driver. Search the mDiscoveredList to see if any driver can\r | |
754 | be placed on the mScheduledQueue. If no drivers are placed on the\r | |
5657b268 | 755 | mScheduledQueue exit the function. \r |
756 | \r | |
757 | @retval EFI_SUCCESS All of the SMM Drivers that could be dispatched\r | |
758 | have been run and the SMM Entry Point has been\r | |
759 | registered.\r | |
760 | @retval EFI_NOT_READY The SMM Driver that registered the SMM Entry Point\r | |
761 | was just dispatched.\r | |
762 | @retval EFI_NOT_FOUND There are no SMM Drivers available to be dispatched.\r | |
e42e9404 | 763 | @retval EFI_ALREADY_STARTED The SMM Dispatcher is already running\r |
e42e9404 | 764 | \r |
765 | **/\r | |
766 | EFI_STATUS\r | |
767 | SmmDispatcher (\r | |
768 | VOID\r | |
769 | )\r | |
770 | {\r | |
771 | EFI_STATUS Status;\r | |
e42e9404 | 772 | LIST_ENTRY *Link;\r |
773 | EFI_SMM_DRIVER_ENTRY *DriverEntry;\r | |
774 | BOOLEAN ReadyToRun;\r | |
5657b268 | 775 | BOOLEAN PreviousSmmEntryPointRegistered;\r |
e42e9404 | 776 | \r |
777 | if (!gRequestDispatch) {\r | |
778 | return EFI_NOT_FOUND;\r | |
779 | }\r | |
780 | \r | |
781 | if (gDispatcherRunning) {\r | |
782 | //\r | |
783 | // If the dispatcher is running don't let it be restarted.\r | |
784 | //\r | |
785 | return EFI_ALREADY_STARTED;\r | |
786 | }\r | |
787 | \r | |
788 | gDispatcherRunning = TRUE;\r | |
789 | \r | |
e42e9404 | 790 | do {\r |
791 | //\r | |
792 | // Drain the Scheduled Queue\r | |
793 | //\r | |
794 | while (!IsListEmpty (&mScheduledQueue)) {\r | |
795 | DriverEntry = CR (\r | |
796 | mScheduledQueue.ForwardLink,\r | |
797 | EFI_SMM_DRIVER_ENTRY,\r | |
798 | ScheduledLink,\r | |
799 | EFI_SMM_DRIVER_ENTRY_SIGNATURE\r | |
800 | );\r | |
801 | \r | |
802 | //\r | |
803 | // Load the SMM Driver image into memory. If the Driver was transitioned from\r | |
804 | // Untrused to Scheduled it would have already been loaded so we may need to\r | |
805 | // skip the LoadImage\r | |
806 | //\r | |
807 | if (DriverEntry->ImageHandle == NULL) {\r | |
808 | Status = SmmLoadImage (DriverEntry);\r | |
809 | \r | |
810 | //\r | |
811 | // Update the driver state to reflect that it's been loaded\r | |
812 | //\r | |
813 | if (EFI_ERROR (Status)) {\r | |
fa542a1e | 814 | //\r |
815 | // The SMM Driver could not be loaded, and do not attempt to load or start it again.\r | |
816 | // Take driver from Scheduled to Initialized.\r | |
817 | //\r | |
818 | DriverEntry->Initialized = TRUE;\r | |
e42e9404 | 819 | DriverEntry->Scheduled = FALSE;\r |
820 | RemoveEntryList (&DriverEntry->ScheduledLink);\r | |
821 | \r | |
822 | //\r | |
823 | // If it's an error don't try the StartImage\r | |
824 | //\r | |
825 | continue;\r | |
826 | }\r | |
827 | }\r | |
828 | \r | |
829 | DriverEntry->Scheduled = FALSE;\r | |
830 | DriverEntry->Initialized = TRUE;\r | |
831 | RemoveEntryList (&DriverEntry->ScheduledLink);\r | |
832 | \r | |
833 | REPORT_STATUS_CODE_WITH_EXTENDED_DATA (\r | |
834 | EFI_PROGRESS_CODE,\r | |
835 | EFI_SOFTWARE_SMM_DRIVER | EFI_SW_PC_INIT_BEGIN,\r | |
836 | &DriverEntry->ImageHandle,\r | |
837 | sizeof (DriverEntry->ImageHandle)\r | |
838 | );\r | |
839 | \r | |
5657b268 | 840 | //\r |
841 | // Cache state of SmmEntryPointRegistered before calling entry point\r | |
842 | //\r | |
843 | PreviousSmmEntryPointRegistered = gSmmCorePrivate->SmmEntryPointRegistered;\r | |
844 | \r | |
e42e9404 | 845 | //\r |
846 | // For each SMM driver, pass NULL as ImageHandle\r | |
847 | //\r | |
c2cb08df | 848 | PERF_START (DriverEntry->ImageHandle, "StartImage:", NULL, 0);\r |
e42e9404 | 849 | Status = ((EFI_IMAGE_ENTRY_POINT)(UINTN)DriverEntry->ImageEntryPoint)(DriverEntry->ImageHandle, gST);\r |
c2cb08df | 850 | PERF_END (DriverEntry->ImageHandle, "StartImage:", NULL, 0);\r |
e42e9404 | 851 | if (EFI_ERROR(Status)){\r |
852 | SmmFreePages(DriverEntry->ImageBuffer, DriverEntry->NumberOfPage);\r | |
853 | }\r | |
854 | \r | |
855 | REPORT_STATUS_CODE_WITH_EXTENDED_DATA (\r | |
856 | EFI_PROGRESS_CODE,\r | |
857 | EFI_SOFTWARE_SMM_DRIVER | EFI_SW_PC_INIT_END,\r | |
858 | &DriverEntry->ImageHandle,\r | |
859 | sizeof (DriverEntry->ImageHandle)\r | |
860 | );\r | |
861 | \r | |
5657b268 | 862 | if (!PreviousSmmEntryPointRegistered && gSmmCorePrivate->SmmEntryPointRegistered) {\r |
863 | //\r | |
864 | // Return immediately if the SMM Entry Point was registered by the SMM \r | |
865 | // Driver that was just dispatched. The SMM IPL will reinvoke the SMM\r | |
866 | // Core Dispatcher. This is required so SMM Mode may be enabled as soon \r | |
867 | // as all the dependent SMM Drivers for SMM Mode have been dispatched. \r | |
868 | // Once the SMM Entry Point has been registered, then SMM Mode will be \r | |
869 | // used.\r | |
870 | //\r | |
871 | gRequestDispatch = TRUE;\r | |
872 | gDispatcherRunning = FALSE;\r | |
873 | return EFI_NOT_READY;\r | |
874 | }\r | |
e42e9404 | 875 | }\r |
876 | \r | |
877 | //\r | |
878 | // Search DriverList for items to place on Scheduled Queue\r | |
879 | //\r | |
880 | ReadyToRun = FALSE;\r | |
881 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
882 | DriverEntry = CR (Link, EFI_SMM_DRIVER_ENTRY, Link, EFI_SMM_DRIVER_ENTRY_SIGNATURE);\r | |
883 | \r | |
884 | if (DriverEntry->DepexProtocolError){\r | |
885 | //\r | |
886 | // If Section Extraction Protocol did not let the Depex be read before retry the read\r | |
887 | //\r | |
888 | Status = SmmGetDepexSectionAndPreProccess (DriverEntry);\r | |
889 | }\r | |
890 | \r | |
891 | if (DriverEntry->Dependent) {\r | |
892 | if (SmmIsSchedulable (DriverEntry)) {\r | |
893 | SmmInsertOnScheduledQueueWhileProcessingBeforeAndAfter (DriverEntry);\r | |
894 | ReadyToRun = TRUE;\r | |
895 | }\r | |
896 | }\r | |
897 | }\r | |
898 | } while (ReadyToRun);\r | |
899 | \r | |
900 | //\r | |
901 | // If there is no more SMM driver to dispatch, stop the dispatch request\r | |
902 | //\r | |
903 | gRequestDispatch = FALSE;\r | |
904 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
905 | DriverEntry = CR (Link, EFI_SMM_DRIVER_ENTRY, Link, EFI_SMM_DRIVER_ENTRY_SIGNATURE);\r | |
906 | \r | |
907 | if (!DriverEntry->Initialized){\r | |
908 | //\r | |
909 | // We have SMM driver pending to dispatch\r | |
910 | //\r | |
911 | gRequestDispatch = TRUE;\r | |
912 | break;\r | |
913 | }\r | |
914 | }\r | |
915 | \r | |
916 | gDispatcherRunning = FALSE;\r | |
917 | \r | |
5657b268 | 918 | return EFI_SUCCESS;\r |
e42e9404 | 919 | }\r |
920 | \r | |
921 | /**\r | |
922 | Insert InsertedDriverEntry onto the mScheduledQueue. To do this you\r | |
923 | must add any driver with a before dependency on InsertedDriverEntry first.\r | |
924 | You do this by recursively calling this routine. After all the Befores are\r | |
925 | processed you can add InsertedDriverEntry to the mScheduledQueue.\r | |
926 | Then you can add any driver with an After dependency on InsertedDriverEntry\r | |
927 | by recursively calling this routine.\r | |
928 | \r | |
929 | @param InsertedDriverEntry The driver to insert on the ScheduledLink Queue\r | |
930 | \r | |
931 | **/\r | |
932 | VOID\r | |
933 | SmmInsertOnScheduledQueueWhileProcessingBeforeAndAfter (\r | |
934 | IN EFI_SMM_DRIVER_ENTRY *InsertedDriverEntry\r | |
935 | )\r | |
936 | {\r | |
937 | LIST_ENTRY *Link;\r | |
938 | EFI_SMM_DRIVER_ENTRY *DriverEntry;\r | |
939 | \r | |
940 | //\r | |
941 | // Process Before Dependency\r | |
942 | //\r | |
943 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
944 | DriverEntry = CR(Link, EFI_SMM_DRIVER_ENTRY, Link, EFI_SMM_DRIVER_ENTRY_SIGNATURE);\r | |
6a55eea3 | 945 | if (DriverEntry->Before && DriverEntry->Dependent && DriverEntry != InsertedDriverEntry) {\r |
946 | DEBUG ((DEBUG_DISPATCH, "Evaluate SMM DEPEX for FFS(%g)\n", &DriverEntry->FileName));\r | |
947 | DEBUG ((DEBUG_DISPATCH, " BEFORE FFS(%g) = ", &DriverEntry->BeforeAfterGuid));\r | |
e42e9404 | 948 | if (CompareGuid (&InsertedDriverEntry->FileName, &DriverEntry->BeforeAfterGuid)) {\r |
949 | //\r | |
950 | // Recursively process BEFORE\r | |
951 | //\r | |
6a55eea3 | 952 | DEBUG ((DEBUG_DISPATCH, "TRUE\n END\n RESULT = TRUE\n"));\r |
e42e9404 | 953 | SmmInsertOnScheduledQueueWhileProcessingBeforeAndAfter (DriverEntry);\r |
6a55eea3 | 954 | } else {\r |
955 | DEBUG ((DEBUG_DISPATCH, "FALSE\n END\n RESULT = FALSE\n"));\r | |
e42e9404 | 956 | }\r |
957 | }\r | |
958 | }\r | |
959 | \r | |
960 | //\r | |
961 | // Convert driver from Dependent to Scheduled state\r | |
962 | //\r | |
963 | \r | |
964 | InsertedDriverEntry->Dependent = FALSE;\r | |
965 | InsertedDriverEntry->Scheduled = TRUE;\r | |
966 | InsertTailList (&mScheduledQueue, &InsertedDriverEntry->ScheduledLink);\r | |
967 | \r | |
968 | \r | |
969 | //\r | |
970 | // Process After Dependency\r | |
971 | //\r | |
972 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
973 | DriverEntry = CR(Link, EFI_SMM_DRIVER_ENTRY, Link, EFI_SMM_DRIVER_ENTRY_SIGNATURE);\r | |
6a55eea3 | 974 | if (DriverEntry->After && DriverEntry->Dependent && DriverEntry != InsertedDriverEntry) {\r |
975 | DEBUG ((DEBUG_DISPATCH, "Evaluate SMM DEPEX for FFS(%g)\n", &DriverEntry->FileName));\r | |
976 | DEBUG ((DEBUG_DISPATCH, " AFTER FFS(%g) = ", &DriverEntry->BeforeAfterGuid));\r | |
e42e9404 | 977 | if (CompareGuid (&InsertedDriverEntry->FileName, &DriverEntry->BeforeAfterGuid)) {\r |
978 | //\r | |
979 | // Recursively process AFTER\r | |
980 | //\r | |
6a55eea3 | 981 | DEBUG ((DEBUG_DISPATCH, "TRUE\n END\n RESULT = TRUE\n"));\r |
e42e9404 | 982 | SmmInsertOnScheduledQueueWhileProcessingBeforeAndAfter (DriverEntry);\r |
6a55eea3 | 983 | } else {\r |
984 | DEBUG ((DEBUG_DISPATCH, "FALSE\n END\n RESULT = FALSE\n"));\r | |
e42e9404 | 985 | }\r |
986 | }\r | |
987 | }\r | |
988 | }\r | |
989 | \r | |
990 | /**\r | |
991 | Return TRUE if the Fv has been processed, FALSE if not.\r | |
992 | \r | |
993 | @param FvHandle The handle of a FV that's being tested\r | |
994 | \r | |
995 | @retval TRUE Fv protocol on FvHandle has been processed\r | |
996 | @retval FALSE Fv protocol on FvHandle has not yet been\r | |
997 | processed\r | |
998 | \r | |
999 | **/\r | |
1000 | BOOLEAN\r | |
1001 | FvHasBeenProcessed (\r | |
1002 | IN EFI_HANDLE FvHandle\r | |
1003 | )\r | |
1004 | {\r | |
1005 | LIST_ENTRY *Link;\r | |
1006 | KNOWN_HANDLE *KnownHandle;\r | |
1007 | \r | |
1008 | for (Link = mFvHandleList.ForwardLink; Link != &mFvHandleList; Link = Link->ForwardLink) {\r | |
1009 | KnownHandle = CR(Link, KNOWN_HANDLE, Link, KNOWN_HANDLE_SIGNATURE);\r | |
1010 | if (KnownHandle->Handle == FvHandle) {\r | |
1011 | return TRUE;\r | |
1012 | }\r | |
1013 | }\r | |
1014 | return FALSE;\r | |
1015 | }\r | |
1016 | \r | |
1017 | /**\r | |
1018 | Remember that Fv protocol on FvHandle has had it's drivers placed on the\r | |
1019 | mDiscoveredList. This fucntion adds entries on the mFvHandleList. Items are\r | |
1020 | never removed/freed from the mFvHandleList.\r | |
1021 | \r | |
1022 | @param FvHandle The handle of a FV that has been processed\r | |
1023 | \r | |
1024 | **/\r | |
1025 | VOID\r | |
1026 | FvIsBeingProcesssed (\r | |
1027 | IN EFI_HANDLE FvHandle\r | |
1028 | )\r | |
1029 | {\r | |
1030 | KNOWN_HANDLE *KnownHandle;\r | |
1031 | \r | |
1032 | KnownHandle = AllocatePool (sizeof (KNOWN_HANDLE));\r | |
1033 | ASSERT (KnownHandle != NULL);\r | |
1034 | \r | |
1035 | KnownHandle->Signature = KNOWN_HANDLE_SIGNATURE;\r | |
1036 | KnownHandle->Handle = FvHandle;\r | |
1037 | InsertTailList (&mFvHandleList, &KnownHandle->Link);\r | |
1038 | }\r | |
1039 | \r | |
1040 | /**\r | |
1041 | Convert FvHandle and DriverName into an EFI device path\r | |
1042 | \r | |
1043 | @param Fv Fv protocol, needed to read Depex info out of\r | |
1044 | FLASH.\r | |
1045 | @param FvHandle Handle for Fv, needed in the\r | |
1046 | EFI_SMM_DRIVER_ENTRY so that the PE image can be\r | |
1047 | read out of the FV at a later time.\r | |
1048 | @param DriverName Name of driver to add to mDiscoveredList.\r | |
1049 | \r | |
1050 | @return Pointer to device path constructed from FvHandle and DriverName\r | |
1051 | \r | |
1052 | **/\r | |
1053 | EFI_DEVICE_PATH_PROTOCOL *\r | |
1054 | SmmFvToDevicePath (\r | |
1055 | IN EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv,\r | |
1056 | IN EFI_HANDLE FvHandle,\r | |
1057 | IN EFI_GUID *DriverName\r | |
1058 | )\r | |
1059 | {\r | |
1060 | EFI_STATUS Status;\r | |
1061 | EFI_DEVICE_PATH_PROTOCOL *FvDevicePath;\r | |
1062 | EFI_DEVICE_PATH_PROTOCOL *FileNameDevicePath;\r | |
1063 | \r | |
1064 | //\r | |
1065 | // Remember the device path of the FV\r | |
1066 | //\r | |
1067 | Status = gBS->HandleProtocol (FvHandle, &gEfiDevicePathProtocolGuid, (VOID **)&FvDevicePath);\r | |
1068 | if (EFI_ERROR (Status)) {\r | |
1069 | FileNameDevicePath = NULL;\r | |
1070 | } else {\r | |
1071 | //\r | |
1072 | // Build a device path to the file in the FV to pass into gBS->LoadImage\r | |
1073 | //\r | |
1074 | EfiInitializeFwVolDevicepathNode (&mFvDevicePath.File, DriverName);\r | |
1075 | SetDevicePathEndNode (&mFvDevicePath.End);\r | |
1076 | \r | |
1077 | //\r | |
1078 | // Note: FileNameDevicePath is in DXE memory\r | |
1079 | //\r | |
1080 | FileNameDevicePath = AppendDevicePath (\r | |
1081 | FvDevicePath,\r | |
1082 | (EFI_DEVICE_PATH_PROTOCOL *)&mFvDevicePath\r | |
1083 | );\r | |
1084 | }\r | |
1085 | return FileNameDevicePath;\r | |
1086 | }\r | |
1087 | \r | |
1088 | /**\r | |
1089 | Add an entry to the mDiscoveredList. Allocate memory to store the DriverEntry,\r | |
1090 | and initilize any state variables. Read the Depex from the FV and store it\r | |
fa542a1e | 1091 | in DriverEntry. Pre-process the Depex to set the Before and After state.\r |
e42e9404 | 1092 | The Discovered list is never free'ed and contains booleans that represent the\r |
1093 | other possible SMM driver states.\r | |
1094 | \r | |
1095 | @param Fv Fv protocol, needed to read Depex info out of\r | |
1096 | FLASH.\r | |
1097 | @param FvHandle Handle for Fv, needed in the\r | |
1098 | EFI_SMM_DRIVER_ENTRY so that the PE image can be\r | |
1099 | read out of the FV at a later time.\r | |
1100 | @param DriverName Name of driver to add to mDiscoveredList.\r | |
1101 | \r | |
1102 | @retval EFI_SUCCESS If driver was added to the mDiscoveredList.\r | |
1103 | @retval EFI_ALREADY_STARTED The driver has already been started. Only one\r | |
1104 | DriverName may be active in the system at any one\r | |
1105 | time.\r | |
1106 | \r | |
1107 | **/\r | |
1108 | EFI_STATUS\r | |
1109 | SmmAddToDriverList (\r | |
1110 | IN EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv,\r | |
1111 | IN EFI_HANDLE FvHandle,\r | |
1112 | IN EFI_GUID *DriverName\r | |
1113 | )\r | |
1114 | {\r | |
1115 | EFI_SMM_DRIVER_ENTRY *DriverEntry;\r | |
1116 | \r | |
1117 | //\r | |
1118 | // Create the Driver Entry for the list. ZeroPool initializes lots of variables to\r | |
1119 | // NULL or FALSE.\r | |
1120 | //\r | |
1121 | DriverEntry = AllocateZeroPool (sizeof (EFI_SMM_DRIVER_ENTRY));\r | |
1122 | ASSERT (DriverEntry != NULL);\r | |
1123 | \r | |
1124 | DriverEntry->Signature = EFI_SMM_DRIVER_ENTRY_SIGNATURE;\r | |
1125 | CopyGuid (&DriverEntry->FileName, DriverName);\r | |
1126 | DriverEntry->FvHandle = FvHandle;\r | |
1127 | DriverEntry->Fv = Fv;\r | |
1128 | DriverEntry->FvFileDevicePath = SmmFvToDevicePath (Fv, FvHandle, DriverName);\r | |
1129 | \r | |
1130 | SmmGetDepexSectionAndPreProccess (DriverEntry);\r | |
1131 | \r | |
1132 | InsertTailList (&mDiscoveredList, &DriverEntry->Link);\r | |
1133 | gRequestDispatch = TRUE;\r | |
1134 | \r | |
1135 | return EFI_SUCCESS;\r | |
1136 | }\r | |
1137 | \r | |
1138 | /**\r | |
1139 | This function is the main entry point for an SMM handler dispatch\r | |
1140 | or communicate-based callback.\r | |
1141 | \r | |
1142 | Event notification that is fired every time a FV dispatch protocol is added.\r | |
1143 | More than one protocol may have been added when this event is fired, so you\r | |
1144 | must loop on SmmLocateHandle () to see how many protocols were added and\r | |
1145 | do the following to each FV:\r | |
1146 | If the Fv has already been processed, skip it. If the Fv has not been\r | |
1147 | processed then mark it as being processed, as we are about to process it.\r | |
1148 | Read the Fv and add any driver in the Fv to the mDiscoveredList.The\r | |
1149 | mDiscoveredList is never free'ed and contains variables that define\r | |
1150 | the other states the SMM driver transitions to..\r | |
1151 | While you are at it read the A Priori file into memory.\r | |
1152 | Place drivers in the A Priori list onto the mScheduledQueue.\r | |
1153 | \r | |
1154 | @param DispatchHandle The unique handle assigned to this handler by SmiHandlerRegister().\r | |
1155 | @param Context Points to an optional handler context which was specified when the handler was registered.\r | |
1156 | @param CommBuffer A pointer to a collection of data in memory that will\r | |
1157 | be conveyed from a non-SMM environment into an SMM environment.\r | |
1158 | @param CommBufferSize The size of the CommBuffer.\r | |
1159 | \r | |
1160 | @return Status Code\r | |
1161 | \r | |
1162 | **/\r | |
1163 | EFI_STATUS\r | |
1164 | EFIAPI\r | |
1165 | SmmDriverDispatchHandler (\r | |
1166 | IN EFI_HANDLE DispatchHandle,\r | |
1167 | IN CONST VOID *Context, OPTIONAL\r | |
1168 | IN OUT VOID *CommBuffer, OPTIONAL\r | |
1169 | IN OUT UINTN *CommBufferSize OPTIONAL\r | |
1170 | )\r | |
1171 | {\r | |
1172 | EFI_STATUS Status;\r | |
1173 | UINTN HandleCount;\r | |
1174 | EFI_HANDLE *HandleBuffer;\r | |
1175 | EFI_STATUS GetNextFileStatus;\r | |
1176 | EFI_STATUS SecurityStatus;\r | |
1177 | EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv;\r | |
1178 | EFI_DEVICE_PATH_PROTOCOL *FvDevicePath;\r | |
1179 | EFI_HANDLE FvHandle;\r | |
1180 | EFI_GUID NameGuid;\r | |
1181 | UINTN Key;\r | |
1182 | EFI_FV_FILETYPE Type;\r | |
1183 | EFI_FV_FILE_ATTRIBUTES Attributes;\r | |
1184 | UINTN Size;\r | |
1185 | EFI_SMM_DRIVER_ENTRY *DriverEntry;\r | |
1186 | EFI_GUID *AprioriFile;\r | |
1187 | UINTN AprioriEntryCount;\r | |
1188 | UINTN Index;\r | |
1189 | LIST_ENTRY *Link;\r | |
1190 | UINT32 AuthenticationStatus;\r | |
1191 | UINTN SizeOfBuffer;\r | |
1192 | \r | |
1193 | HandleBuffer = NULL;\r | |
1194 | Status = gBS->LocateHandleBuffer (\r | |
1195 | ByProtocol,\r | |
1196 | &gEfiFirmwareVolume2ProtocolGuid,\r | |
1197 | NULL,\r | |
1198 | &HandleCount,\r | |
1199 | &HandleBuffer\r | |
1200 | );\r | |
1201 | if (EFI_ERROR (Status)) {\r | |
1202 | return EFI_NOT_FOUND;\r | |
1203 | }\r | |
1204 | \r | |
1205 | for (Index = 0; Index < HandleCount; Index++) {\r | |
1206 | FvHandle = HandleBuffer[Index];\r | |
1207 | \r | |
1208 | if (FvHasBeenProcessed (FvHandle)) {\r | |
1209 | //\r | |
1210 | // This Fv has already been processed so lets skip it!\r | |
1211 | //\r | |
1212 | continue;\r | |
1213 | }\r | |
1214 | \r | |
1215 | //\r | |
1216 | // Since we are about to process this Fv mark it as processed.\r | |
1217 | //\r | |
1218 | FvIsBeingProcesssed (FvHandle);\r | |
1219 | \r | |
1220 | Status = gBS->HandleProtocol (FvHandle, &gEfiFirmwareVolume2ProtocolGuid, (VOID **)&Fv);\r | |
1221 | if (EFI_ERROR (Status)) {\r | |
1222 | //\r | |
1223 | // FvHandle must have a Firmware Volume2 Protocol thus we should never get here.\r | |
1224 | //\r | |
1225 | ASSERT (FALSE);\r | |
1226 | continue;\r | |
1227 | }\r | |
1228 | \r | |
1229 | Status = gBS->HandleProtocol (FvHandle, &gEfiDevicePathProtocolGuid, (VOID **)&FvDevicePath);\r | |
1230 | if (EFI_ERROR (Status)) {\r | |
1231 | //\r | |
1232 | // The Firmware volume doesn't have device path, can't be dispatched.\r | |
1233 | //\r | |
1234 | continue;\r | |
1235 | }\r | |
1236 | \r | |
1237 | //\r | |
1238 | // If the Security Architectural Protocol has not been located yet, then attempt to locate it\r | |
1239 | //\r | |
1240 | if (mSecurity == NULL) {\r | |
1241 | gBS->LocateProtocol (&gEfiSecurityArchProtocolGuid, NULL, (VOID**)&mSecurity);\r | |
1242 | }\r | |
1243 | \r | |
1244 | //\r | |
1245 | // Evaluate the authentication status of the Firmware Volume through\r | |
1246 | // Security Architectural Protocol\r | |
1247 | //\r | |
1248 | if (mSecurity != NULL) {\r | |
1249 | SecurityStatus = mSecurity->FileAuthenticationState (\r | |
1250 | mSecurity,\r | |
1251 | 0,\r | |
1252 | FvDevicePath\r | |
1253 | );\r | |
1254 | if (SecurityStatus != EFI_SUCCESS) {\r | |
1255 | //\r | |
1256 | // Security check failed. The firmware volume should not be used for any purpose.\r | |
1257 | //\r | |
1258 | continue;\r | |
1259 | }\r | |
1260 | }\r | |
1261 | \r | |
1262 | //\r | |
1263 | // Discover Drivers in FV and add them to the Discovered Driver List.\r | |
1264 | // Process EFI_FV_FILETYPE_SMM type and then EFI_FV_FILETYPE_COMBINED_SMM_DXE\r | |
1265 | //\r | |
1266 | for (Index = 0; Index < sizeof (mSmmFileTypes)/sizeof (EFI_FV_FILETYPE); Index++) {\r | |
1267 | //\r | |
1268 | // Initialize the search key\r | |
1269 | //\r | |
1270 | Key = 0;\r | |
1271 | do {\r | |
1272 | Type = mSmmFileTypes[Index];\r | |
1273 | GetNextFileStatus = Fv->GetNextFile (\r | |
1274 | Fv,\r | |
1275 | &Key,\r | |
1276 | &Type,\r | |
1277 | &NameGuid,\r | |
1278 | &Attributes,\r | |
1279 | &Size\r | |
1280 | );\r | |
1281 | if (!EFI_ERROR (GetNextFileStatus)) {\r | |
1282 | SmmAddToDriverList (Fv, FvHandle, &NameGuid);\r | |
1283 | }\r | |
1284 | } while (!EFI_ERROR (GetNextFileStatus));\r | |
1285 | }\r | |
1286 | \r | |
1287 | //\r | |
1288 | // Read the array of GUIDs from the Apriori file if it is present in the firmware volume\r | |
1289 | // (Note: AprioriFile is in DXE memory)\r | |
1290 | //\r | |
1291 | AprioriFile = NULL;\r | |
1292 | Status = Fv->ReadSection (\r | |
1293 | Fv,\r | |
1294 | &gAprioriGuid,\r | |
1295 | EFI_SECTION_RAW,\r | |
1296 | 0,\r | |
1297 | (VOID **)&AprioriFile,\r | |
1298 | &SizeOfBuffer,\r | |
1299 | &AuthenticationStatus\r | |
1300 | );\r | |
1301 | if (!EFI_ERROR (Status)) {\r | |
1302 | AprioriEntryCount = SizeOfBuffer / sizeof (EFI_GUID);\r | |
1303 | } else {\r | |
1304 | AprioriEntryCount = 0;\r | |
1305 | }\r | |
1306 | \r | |
1307 | //\r | |
1308 | // Put drivers on Apriori List on the Scheduled queue. The Discovered List includes\r | |
1309 | // drivers not in the current FV and these must be skipped since the a priori list\r | |
1310 | // is only valid for the FV that it resided in.\r | |
1311 | //\r | |
1312 | \r | |
1313 | for (Index = 0; Index < AprioriEntryCount; Index++) {\r | |
1314 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
1315 | DriverEntry = CR(Link, EFI_SMM_DRIVER_ENTRY, Link, EFI_SMM_DRIVER_ENTRY_SIGNATURE);\r | |
1316 | if (CompareGuid (&DriverEntry->FileName, &AprioriFile[Index]) &&\r | |
1317 | (FvHandle == DriverEntry->FvHandle)) {\r | |
1318 | DriverEntry->Dependent = FALSE;\r | |
1319 | DriverEntry->Scheduled = TRUE;\r | |
1320 | InsertTailList (&mScheduledQueue, &DriverEntry->ScheduledLink);\r | |
6a55eea3 | 1321 | DEBUG ((DEBUG_DISPATCH, "Evaluate SMM DEPEX for FFS(%g)\n", &DriverEntry->FileName));\r |
1322 | DEBUG ((DEBUG_DISPATCH, " RESULT = TRUE (Apriori)\n"));\r | |
e42e9404 | 1323 | break;\r |
1324 | }\r | |
1325 | }\r | |
1326 | }\r | |
1327 | \r | |
1328 | //\r | |
1329 | // Free data allocated by Fv->ReadSection ()\r | |
1330 | //\r | |
1331 | // The UEFI Boot Services FreePool() function must be used because Fv->ReadSection \r | |
1332 | // used the UEFI Boot Services AllocatePool() function\r | |
1333 | //\r | |
1334 | gBS->FreePool (AprioriFile);\r | |
1335 | }\r | |
1336 | \r | |
1337 | //\r | |
1338 | // Execute the SMM Dispatcher on any newly discovered FVs and previously \r | |
1339 | // discovered SMM drivers that have been discovered but not dispatched.\r | |
1340 | //\r | |
5657b268 | 1341 | Status = SmmDispatcher ();\r |
1342 | \r | |
1343 | //\r | |
1344 | // Check to see if CommBuffer and CommBufferSize are valid\r | |
1345 | //\r | |
1346 | if (CommBuffer != NULL && CommBufferSize != NULL) {\r | |
1347 | if (*CommBufferSize > 0) {\r | |
1348 | if (Status == EFI_NOT_READY) {\r | |
1349 | //\r | |
1350 | // If a the SMM Core Entry Point was just registered, then set flag to \r | |
1351 | // request the SMM Dispatcher to be restarted.\r | |
1352 | //\r | |
1353 | *(UINT8 *)CommBuffer = COMM_BUFFER_SMM_DISPATCH_RESTART;\r | |
1354 | } else if (!EFI_ERROR (Status)) {\r | |
1355 | //\r | |
1356 | // Set the flag to show that the SMM Dispatcher executed without errors\r | |
1357 | //\r | |
1358 | *(UINT8 *)CommBuffer = COMM_BUFFER_SMM_DISPATCH_SUCCESS;\r | |
1359 | } else {\r | |
1360 | //\r | |
1361 | // Set the flag to show that the SMM Dispatcher encountered an error\r | |
1362 | //\r | |
1363 | *(UINT8 *)CommBuffer = COMM_BUFFER_SMM_DISPATCH_ERROR;\r | |
1364 | }\r | |
1365 | }\r | |
1366 | }\r | |
1367 | \r | |
1368 | return EFI_SUCCESS;\r | |
e42e9404 | 1369 | }\r |
1370 | \r | |
1371 | /**\r | |
1372 | Traverse the discovered list for any drivers that were discovered but not loaded\r | |
1373 | because the dependency experessions evaluated to false.\r | |
1374 | \r | |
1375 | **/\r | |
1376 | VOID\r | |
1377 | SmmDisplayDiscoveredNotDispatched (\r | |
1378 | VOID\r | |
1379 | )\r | |
1380 | {\r | |
1381 | LIST_ENTRY *Link;\r | |
1382 | EFI_SMM_DRIVER_ENTRY *DriverEntry;\r | |
1383 | \r | |
1384 | for (Link = mDiscoveredList.ForwardLink;Link !=&mDiscoveredList; Link = Link->ForwardLink) {\r | |
1385 | DriverEntry = CR(Link, EFI_SMM_DRIVER_ENTRY, Link, EFI_SMM_DRIVER_ENTRY_SIGNATURE);\r | |
1386 | if (DriverEntry->Dependent) {\r | |
1387 | DEBUG ((DEBUG_LOAD, "SMM Driver %g was discovered but not loaded!!\n", &DriverEntry->FileName));\r | |
1388 | }\r | |
1389 | }\r | |
1390 | }\r |