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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 | |
5 | is added to the mDiscoveredList. The Before, and After Depex are\r | |
6 | pre-processed as drivers are added to the mDiscoveredList. If an Apriori\r | |
7 | file exists in the FV those drivers are addeded to the\r | |
8 | mScheduledQueue. The mFvHandleList is used to make sure a\r | |
9 | FV is only processed once.\r | |
10 | \r | |
11 | Step #2 - Dispatch. Remove driver from the mScheduledQueue and load and\r | |
12 | start it. After mScheduledQueue is drained check the\r | |
13 | mDiscoveredList to see if any item has a Depex that is ready to\r | |
14 | be placed on the mScheduledQueue.\r | |
15 | \r | |
16 | Step #3 - Adding to the mScheduledQueue requires that you process Before\r | |
17 | and After dependencies. This is done recursively as the call to add\r | |
18 | to the mScheduledQueue checks for Before and recursively adds\r | |
19 | all Befores. It then addes the item that was passed in and then\r | |
20 | processess the After dependecies by recursively calling the routine.\r | |
21 | \r | |
22 | Dispatcher Rules:\r | |
23 | The rules for the dispatcher are similar to the DXE dispatcher.\r | |
24 | \r | |
25 | The rules for DXE dispatcher are in chapter 10 of the DXE CIS. Figure 10-3\r | |
26 | is the state diagram for the DXE dispatcher\r | |
27 | \r | |
28 | Depex - Dependency Expresion.\r | |
29 | \r | |
30 | Copyright (c) 2014, Hewlett-Packard Development Company, L.P.\r | |
31 | Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>\r | |
32 | This program and the accompanying materials are licensed and made available\r | |
33 | under the terms and conditions of the BSD License which accompanies this\r | |
34 | distribution. The full text of the license may be found at\r | |
35 | http://opensource.org/licenses/bsd-license.php\r | |
36 | \r | |
37 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
38 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
39 | \r | |
40 | **/\r | |
41 | \r | |
42 | #include "PiSmmCore.h"\r | |
43 | \r | |
44 | //\r | |
45 | // SMM Dispatcher Data structures\r | |
46 | //\r | |
47 | #define KNOWN_HANDLE_SIGNATURE SIGNATURE_32('k','n','o','w')\r | |
48 | typedef struct {\r | |
49 | UINTN Signature;\r | |
50 | LIST_ENTRY Link; // mFvHandleList\r | |
51 | EFI_HANDLE Handle;\r | |
52 | } KNOWN_HANDLE;\r | |
53 | \r | |
54 | //\r | |
55 | // Function Prototypes\r | |
56 | //\r | |
57 | \r | |
58 | /**\r | |
59 | Insert InsertedDriverEntry onto the mScheduledQueue. To do this you\r | |
60 | must add any driver with a before dependency on InsertedDriverEntry first.\r | |
61 | You do this by recursively calling this routine. After all the Befores are\r | |
62 | processed you can add InsertedDriverEntry to the mScheduledQueue.\r | |
63 | Then you can add any driver with an After dependency on InsertedDriverEntry\r | |
64 | by recursively calling this routine.\r | |
65 | \r | |
66 | @param InsertedDriverEntry The driver to insert on the ScheduledLink Queue\r | |
67 | \r | |
68 | **/\r | |
69 | VOID\r | |
70 | SmmInsertOnScheduledQueueWhileProcessingBeforeAndAfter (\r | |
71 | IN EFI_SMM_DRIVER_ENTRY *InsertedDriverEntry\r | |
72 | );\r | |
73 | \r | |
74 | //\r | |
75 | // The Driver List contains one copy of every driver that has been discovered.\r | |
76 | // Items are never removed from the driver list. List of EFI_SMM_DRIVER_ENTRY\r | |
77 | //\r | |
78 | LIST_ENTRY mDiscoveredList = INITIALIZE_LIST_HEAD_VARIABLE (mDiscoveredList);\r | |
79 | \r | |
80 | //\r | |
81 | // Queue of drivers that are ready to dispatch. This queue is a subset of the\r | |
82 | // mDiscoveredList.list of EFI_SMM_DRIVER_ENTRY.\r | |
83 | //\r | |
84 | LIST_ENTRY mScheduledQueue = INITIALIZE_LIST_HEAD_VARIABLE (mScheduledQueue);\r | |
85 | \r | |
86 | //\r | |
87 | // List of handles who's Fv's have been parsed and added to the mFwDriverList.\r | |
88 | //\r | |
89 | LIST_ENTRY mFvHandleList = INITIALIZE_LIST_HEAD_VARIABLE (mFvHandleList);\r | |
90 | \r | |
91 | //\r | |
92 | // Flag for the SMM Dispacher. TRUE if dispatcher is execuing.\r | |
93 | //\r | |
94 | BOOLEAN gDispatcherRunning = FALSE;\r | |
95 | \r | |
96 | //\r | |
97 | // Flag for the SMM Dispacher. TRUE if there is one or more SMM drivers ready to be dispatched\r | |
98 | //\r | |
99 | BOOLEAN gRequestDispatch = FALSE;\r | |
100 | \r | |
101 | //\r | |
102 | // List of file types supported by dispatcher\r | |
103 | //\r | |
104 | EFI_FV_FILETYPE mSmmFileTypes[] = {\r | |
105 | EFI_FV_FILETYPE_SMM,\r | |
106 | EFI_FV_FILETYPE_COMBINED_SMM_DXE,\r | |
107 | EFI_FV_FILETYPE_SMM_CORE,\r | |
108 | //\r | |
109 | // Note: DXE core will process the FV image file, so skip it in SMM core\r | |
110 | // EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE\r | |
111 | //\r | |
112 | };\r | |
113 | \r | |
114 | typedef struct {\r | |
115 | MEDIA_FW_VOL_FILEPATH_DEVICE_PATH File;\r | |
116 | EFI_DEVICE_PATH_PROTOCOL End;\r | |
117 | } FV_FILEPATH_DEVICE_PATH;\r | |
118 | \r | |
119 | FV_FILEPATH_DEVICE_PATH mFvDevicePath;\r | |
120 | \r | |
121 | //\r | |
122 | // DXE Architecture Protocols\r | |
123 | //\r | |
124 | EFI_SECURITY_ARCH_PROTOCOL *mSecurity = NULL;\r | |
125 | EFI_SECURITY2_ARCH_PROTOCOL *mSecurity2 = NULL;\r | |
126 | \r | |
127 | //\r | |
128 | // The global variable is defined for Loading modules at fixed address feature to track the SMM code\r | |
129 | // memory range usage. It is a bit mapped array in which every bit indicates the corresponding\r | |
130 | // memory page available or not.\r | |
131 | //\r | |
132 | GLOBAL_REMOVE_IF_UNREFERENCED UINT64 *mSmmCodeMemoryRangeUsageBitMap=NULL;\r | |
133 | \r | |
134 | /**\r | |
135 | 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 | |
136 | memory range is available, the function will mark the corresponding bits to 1 which indicates the memory range is used.\r | |
137 | The function is only invoked when load modules at fixed address feature is enabled.\r | |
138 | \r | |
139 | @param ImageBase The base address the image will be loaded at.\r | |
140 | @param ImageSize The size of the image\r | |
141 | \r | |
142 | @retval EFI_SUCCESS The memory range the image will be loaded in is available\r | |
143 | @retval EFI_NOT_FOUND The memory range the image will be loaded in is not available\r | |
144 | **/\r | |
145 | EFI_STATUS\r | |
146 | CheckAndMarkFixLoadingMemoryUsageBitMap (\r | |
147 | IN EFI_PHYSICAL_ADDRESS ImageBase,\r | |
148 | IN UINTN ImageSize\r | |
149 | )\r | |
150 | {\r | |
151 | UINT32 SmmCodePageNumber;\r | |
152 | UINT64 SmmCodeSize;\r | |
153 | EFI_PHYSICAL_ADDRESS SmmCodeBase;\r | |
154 | UINTN BaseOffsetPageNumber;\r | |
155 | UINTN TopOffsetPageNumber;\r | |
156 | UINTN Index;\r | |
157 | //\r | |
158 | // Build tool will calculate the smm code size and then patch the PcdLoadFixAddressSmmCodePageNumber\r | |
159 | //\r | |
160 | SmmCodePageNumber = PcdGet32(PcdLoadFixAddressSmmCodePageNumber);\r | |
161 | SmmCodeSize = EFI_PAGES_TO_SIZE (SmmCodePageNumber);\r | |
162 | SmmCodeBase = gLoadModuleAtFixAddressSmramBase;\r | |
163 | \r | |
164 | //\r | |
165 | // If the memory usage bit map is not initialized, do it. Every bit in the array\r | |
166 | // indicate the status of the corresponding memory page, available or not\r | |
167 | //\r | |
168 | if (mSmmCodeMemoryRangeUsageBitMap == NULL) {\r | |
169 | mSmmCodeMemoryRangeUsageBitMap = AllocateZeroPool(((SmmCodePageNumber / 64) + 1)*sizeof(UINT64));\r | |
170 | }\r | |
171 | //\r | |
172 | // If the Dxe code memory range is not allocated or the bit map array allocation failed, return EFI_NOT_FOUND\r | |
173 | //\r | |
174 | if (mSmmCodeMemoryRangeUsageBitMap == NULL) {\r | |
175 | return EFI_NOT_FOUND;\r | |
176 | }\r | |
177 | //\r | |
178 | // see if the memory range for loading the image is in the SMM code range.\r | |
179 | //\r | |
180 | if (SmmCodeBase + SmmCodeSize < ImageBase + ImageSize || SmmCodeBase > ImageBase) {\r | |
181 | return EFI_NOT_FOUND;\r | |
182 | }\r | |
183 | //\r | |
184 | // Test if the memory is avalaible or not.\r | |
185 | //\r | |
186 | BaseOffsetPageNumber = EFI_SIZE_TO_PAGES((UINT32)(ImageBase - SmmCodeBase));\r | |
187 | TopOffsetPageNumber = EFI_SIZE_TO_PAGES((UINT32)(ImageBase + ImageSize - SmmCodeBase));\r | |
188 | for (Index = BaseOffsetPageNumber; Index < TopOffsetPageNumber; Index ++) {\r | |
189 | if ((mSmmCodeMemoryRangeUsageBitMap[Index / 64] & LShiftU64(1, (Index % 64))) != 0) {\r | |
190 | //\r | |
191 | // This page is already used.\r | |
192 | //\r | |
193 | return EFI_NOT_FOUND;\r | |
194 | }\r | |
195 | }\r | |
196 | \r | |
197 | //\r | |
198 | // Being here means the memory range is available. So mark the bits for the memory range\r | |
199 | //\r | |
200 | for (Index = BaseOffsetPageNumber; Index < TopOffsetPageNumber; Index ++) {\r | |
201 | mSmmCodeMemoryRangeUsageBitMap[Index / 64] |= LShiftU64(1, (Index % 64));\r | |
202 | }\r | |
203 | return EFI_SUCCESS;\r | |
204 | }\r | |
205 | /**\r | |
206 | Get the fixed loading address from image header assigned by build tool. This function only be called\r | |
207 | when Loading module at Fixed address feature enabled.\r | |
208 | \r | |
209 | @param ImageContext Pointer to the image context structure that describes the PE/COFF\r | |
210 | image that needs to be examined by this function.\r | |
211 | @retval EFI_SUCCESS An fixed loading address is assigned to this image by build tools .\r | |
212 | @retval EFI_NOT_FOUND The image has no assigned fixed loading address.\r | |
213 | \r | |
214 | **/\r | |
215 | EFI_STATUS\r | |
216 | GetPeCoffImageFixLoadingAssignedAddress(\r | |
217 | IN OUT PE_COFF_LOADER_IMAGE_CONTEXT *ImageContext\r | |
218 | )\r | |
219 | {\r | |
220 | UINTN SectionHeaderOffset;\r | |
221 | EFI_STATUS Status;\r | |
222 | EFI_IMAGE_SECTION_HEADER SectionHeader;\r | |
223 | EFI_IMAGE_OPTIONAL_HEADER_UNION *ImgHdr;\r | |
224 | EFI_PHYSICAL_ADDRESS FixLoadingAddress;\r | |
225 | UINT16 Index;\r | |
226 | UINTN Size;\r | |
227 | UINT16 NumberOfSections;\r | |
228 | UINT64 ValueInSectionHeader;\r | |
229 | \r | |
230 | FixLoadingAddress = 0;\r | |
231 | Status = EFI_NOT_FOUND;\r | |
232 | \r | |
233 | //\r | |
234 | // Get PeHeader pointer\r | |
235 | //\r | |
236 | ImgHdr = (EFI_IMAGE_OPTIONAL_HEADER_UNION *)((CHAR8* )ImageContext->Handle + ImageContext->PeCoffHeaderOffset);\r | |
237 | SectionHeaderOffset = ImageContext->PeCoffHeaderOffset +\r | |
238 | sizeof (UINT32) +\r | |
239 | sizeof (EFI_IMAGE_FILE_HEADER) +\r | |
240 | ImgHdr->Pe32.FileHeader.SizeOfOptionalHeader;\r | |
241 | NumberOfSections = ImgHdr->Pe32.FileHeader.NumberOfSections;\r | |
242 | \r | |
243 | //\r | |
244 | // Get base address from the first section header that doesn't point to code section.\r | |
245 | //\r | |
246 | for (Index = 0; Index < NumberOfSections; Index++) {\r | |
247 | //\r | |
248 | // Read section header from file\r | |
249 | //\r | |
250 | Size = sizeof (EFI_IMAGE_SECTION_HEADER);\r | |
251 | Status = ImageContext->ImageRead (\r | |
252 | ImageContext->Handle,\r | |
253 | SectionHeaderOffset,\r | |
254 | &Size,\r | |
255 | &SectionHeader\r | |
256 | );\r | |
257 | if (EFI_ERROR (Status)) {\r | |
258 | return Status;\r | |
259 | }\r | |
260 | \r | |
261 | Status = EFI_NOT_FOUND;\r | |
262 | \r | |
263 | if ((SectionHeader.Characteristics & EFI_IMAGE_SCN_CNT_CODE) == 0) {\r | |
264 | //\r | |
265 | // Build tool will save the address in PointerToRelocations & PointerToLineNumbers fields in the first section header\r | |
266 | // that doesn't point to code section in image header.So there is an assumption that when the feature is enabled,\r | |
267 | // if a module with a loading address assigned by tools, the PointerToRelocations & PointerToLineNumbers fields\r | |
268 | // should not be Zero, or else, these 2 fields should be set to Zero\r | |
269 | //\r | |
270 | ValueInSectionHeader = ReadUnaligned64((UINT64*)&SectionHeader.PointerToRelocations);\r | |
271 | if (ValueInSectionHeader != 0) {\r | |
272 | //\r | |
273 | // Found first section header that doesn't point to code section in which build tool saves the\r | |
274 | // offset to SMRAM base as image base in PointerToRelocations & PointerToLineNumbers fields\r | |
275 | //\r | |
276 | FixLoadingAddress = (EFI_PHYSICAL_ADDRESS)(gLoadModuleAtFixAddressSmramBase + (INT64)ValueInSectionHeader);\r | |
277 | //\r | |
278 | // Check if the memory range is available.\r | |
279 | //\r | |
280 | Status = CheckAndMarkFixLoadingMemoryUsageBitMap (FixLoadingAddress, (UINTN)(ImageContext->ImageSize + ImageContext->SectionAlignment));\r | |
281 | if (!EFI_ERROR(Status)) {\r | |
282 | //\r | |
283 | // The assigned address is valid. Return the specified loading address\r | |
284 | //\r | |
285 | ImageContext->ImageAddress = FixLoadingAddress;\r | |
286 | }\r | |
287 | }\r | |
288 | break;\r | |
289 | }\r | |
290 | SectionHeaderOffset += sizeof (EFI_IMAGE_SECTION_HEADER);\r | |
291 | }\r | |
292 | DEBUG ((EFI_D_INFO|EFI_D_LOAD, "LOADING MODULE FIXED INFO: Loading module at fixed address %x, Status = %r\n", FixLoadingAddress, Status));\r | |
293 | return Status;\r | |
294 | }\r | |
295 | /**\r | |
296 | Loads an EFI image into SMRAM.\r | |
297 | \r | |
298 | @param DriverEntry EFI_SMM_DRIVER_ENTRY instance\r | |
299 | \r | |
300 | @return EFI_STATUS\r | |
301 | \r | |
302 | **/\r | |
303 | EFI_STATUS\r | |
304 | EFIAPI\r | |
305 | SmmLoadImage (\r | |
306 | IN OUT EFI_SMM_DRIVER_ENTRY *DriverEntry\r | |
307 | )\r | |
308 | {\r | |
309 | UINT32 AuthenticationStatus;\r | |
310 | UINTN FilePathSize;\r | |
311 | VOID *Buffer;\r | |
312 | UINTN Size;\r | |
313 | UINTN PageCount;\r | |
314 | EFI_GUID *NameGuid;\r | |
315 | EFI_STATUS Status;\r | |
316 | EFI_STATUS SecurityStatus;\r | |
317 | EFI_HANDLE DeviceHandle;\r | |
318 | EFI_PHYSICAL_ADDRESS DstBuffer;\r | |
319 | EFI_DEVICE_PATH_PROTOCOL *FilePath;\r | |
320 | EFI_DEVICE_PATH_PROTOCOL *OriginalFilePath;\r | |
321 | EFI_DEVICE_PATH_PROTOCOL *HandleFilePath;\r | |
322 | EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv;\r | |
323 | PE_COFF_LOADER_IMAGE_CONTEXT ImageContext;\r | |
324 | \r | |
325 | PERF_LOAD_IMAGE_BEGIN (DriverEntry->ImageHandle);\r | |
326 | \r | |
327 | Buffer = NULL;\r | |
328 | Size = 0;\r | |
329 | Fv = DriverEntry->Fv;\r | |
330 | NameGuid = &DriverEntry->FileName;\r | |
331 | FilePath = DriverEntry->FvFileDevicePath;\r | |
332 | \r | |
333 | OriginalFilePath = FilePath;\r | |
334 | HandleFilePath = FilePath;\r | |
335 | DeviceHandle = NULL;\r | |
336 | SecurityStatus = EFI_SUCCESS;\r | |
337 | Status = EFI_SUCCESS;\r | |
338 | AuthenticationStatus = 0;\r | |
339 | \r | |
340 | //\r | |
341 | // Try to get the image device handle by checking the match protocol.\r | |
342 | //\r | |
343 | Status = gBS->LocateDevicePath (&gEfiFirmwareVolume2ProtocolGuid, &HandleFilePath, &DeviceHandle);\r | |
344 | if (EFI_ERROR(Status)) {\r | |
345 | return Status;\r | |
346 | }\r | |
347 | \r | |
348 | //\r | |
349 | // If the Security2 and Security Architectural Protocol has not been located yet, then attempt to locate it\r | |
350 | //\r | |
351 | if (mSecurity2 == NULL) {\r | |
352 | gBS->LocateProtocol (&gEfiSecurity2ArchProtocolGuid, NULL, (VOID**)&mSecurity2);\r | |
353 | }\r | |
354 | if (mSecurity == NULL) {\r | |
355 | gBS->LocateProtocol (&gEfiSecurityArchProtocolGuid, NULL, (VOID**)&mSecurity);\r | |
356 | }\r | |
357 | //\r | |
358 | // When Security2 is installed, Security Architectural Protocol must be published.\r | |
359 | //\r | |
360 | ASSERT (mSecurity2 == NULL || mSecurity != NULL);\r | |
361 | \r | |
362 | //\r | |
363 | // Pull out just the file portion of the DevicePath for the LoadedImage FilePath\r | |
364 | //\r | |
365 | FilePath = OriginalFilePath;\r | |
366 | Status = gBS->HandleProtocol (DeviceHandle, &gEfiDevicePathProtocolGuid, (VOID **)&HandleFilePath);\r | |
367 | if (!EFI_ERROR (Status)) {\r | |
368 | FilePathSize = GetDevicePathSize (HandleFilePath) - sizeof(EFI_DEVICE_PATH_PROTOCOL);\r | |
369 | FilePath = (EFI_DEVICE_PATH_PROTOCOL *) (((UINT8 *)FilePath) + FilePathSize );\r | |
370 | }\r | |
371 | \r | |
372 | //\r | |
373 | // Try reading PE32 section firstly\r | |
374 | //\r | |
375 | Status = Fv->ReadSection (\r | |
376 | Fv,\r | |
377 | NameGuid,\r | |
378 | EFI_SECTION_PE32,\r | |
379 | 0,\r | |
380 | &Buffer,\r | |
381 | &Size,\r | |
382 | &AuthenticationStatus\r | |
383 | );\r | |
384 | \r | |
385 | if (EFI_ERROR (Status)) {\r | |
386 | //\r | |
387 | // Try reading TE section secondly\r | |
388 | //\r | |
389 | Buffer = NULL;\r | |
390 | Size = 0;\r | |
391 | Status = Fv->ReadSection (\r | |
392 | Fv,\r | |
393 | NameGuid,\r | |
394 | EFI_SECTION_TE,\r | |
395 | 0,\r | |
396 | &Buffer,\r | |
397 | &Size,\r | |
398 | &AuthenticationStatus\r | |
399 | );\r | |
400 | }\r | |
401 | \r | |
402 | if (EFI_ERROR (Status)) {\r | |
403 | if (Buffer != NULL) {\r | |
404 | gBS->FreePool (Buffer);\r | |
405 | }\r | |
406 | return Status;\r | |
407 | }\r | |
408 | \r | |
409 | //\r | |
410 | // Verify File Authentication through the Security2 Architectural Protocol\r | |
411 | //\r | |
412 | if (mSecurity2 != NULL) {\r | |
413 | SecurityStatus = mSecurity2->FileAuthentication (\r | |
414 | mSecurity2,\r | |
415 | OriginalFilePath,\r | |
416 | Buffer,\r | |
417 | Size,\r | |
418 | FALSE\r | |
419 | );\r | |
420 | }\r | |
421 | \r | |
422 | //\r | |
423 | // Verify the Authentication Status through the Security Architectural Protocol\r | |
424 | // Only on images that have been read using Firmware Volume protocol.\r | |
425 | // All SMM images are from FV protocol.\r | |
426 | //\r | |
427 | if (!EFI_ERROR (SecurityStatus) && (mSecurity != NULL)) {\r | |
428 | SecurityStatus = mSecurity->FileAuthenticationState (\r | |
429 | mSecurity,\r | |
430 | AuthenticationStatus,\r | |
431 | OriginalFilePath\r | |
432 | );\r | |
433 | }\r | |
434 | \r | |
435 | if (EFI_ERROR (SecurityStatus) && SecurityStatus != EFI_SECURITY_VIOLATION) {\r | |
436 | Status = SecurityStatus;\r | |
437 | return Status;\r | |
438 | }\r | |
439 | \r | |
440 | //\r | |
441 | // Initialize ImageContext\r | |
442 | //\r | |
443 | ImageContext.Handle = Buffer;\r | |
444 | ImageContext.ImageRead = PeCoffLoaderImageReadFromMemory;\r | |
445 | \r | |
446 | //\r | |
447 | // Get information about the image being loaded\r | |
448 | //\r | |
449 | Status = PeCoffLoaderGetImageInfo (&ImageContext);\r | |
450 | if (EFI_ERROR (Status)) {\r | |
451 | if (Buffer != NULL) {\r | |
452 | gBS->FreePool (Buffer);\r | |
453 | }\r | |
454 | return Status;\r | |
455 | }\r | |
456 | //\r | |
457 | // if Loading module at Fixed Address feature is enabled, then cut out a memory range started from TESG BASE\r | |
458 | // to hold the Smm driver code\r | |
459 | //\r | |
460 | if (PcdGet64(PcdLoadModuleAtFixAddressEnable) != 0) {\r | |
461 | //\r | |
462 | // Get the fixed loading address assigned by Build tool\r | |
463 | //\r | |
464 | Status = GetPeCoffImageFixLoadingAssignedAddress (&ImageContext);\r | |
465 | if (!EFI_ERROR (Status)) {\r | |
466 | //\r | |
467 | // Since the memory range to load Smm core alreay been cut out, so no need to allocate and free this range\r | |
468 | // following statements is to bypass SmmFreePages\r | |
469 | //\r | |
470 | PageCount = 0;\r | |
471 | DstBuffer = (UINTN)gLoadModuleAtFixAddressSmramBase;\r | |
472 | } else {\r | |
473 | DEBUG ((EFI_D_INFO|EFI_D_LOAD, "LOADING MODULE FIXED ERROR: Failed to load module at fixed address. \n"));\r | |
474 | //\r | |
475 | // allocate the memory to load the SMM driver\r | |
476 | //\r | |
477 | PageCount = (UINTN)EFI_SIZE_TO_PAGES((UINTN)ImageContext.ImageSize + ImageContext.SectionAlignment);\r | |
478 | DstBuffer = (UINTN)(-1);\r | |
479 | \r | |
480 | Status = SmmAllocatePages (\r | |
481 | AllocateMaxAddress,\r | |
482 | EfiRuntimeServicesCode,\r | |
483 | PageCount,\r | |
484 | &DstBuffer\r | |
485 | );\r | |
486 | if (EFI_ERROR (Status)) {\r | |
487 | if (Buffer != NULL) {\r | |
488 | gBS->FreePool (Buffer);\r | |
489 | }\r | |
490 | return Status;\r | |
491 | }\r | |
492 | ImageContext.ImageAddress = (EFI_PHYSICAL_ADDRESS)DstBuffer;\r | |
493 | }\r | |
494 | } else {\r | |
495 | PageCount = (UINTN)EFI_SIZE_TO_PAGES((UINTN)ImageContext.ImageSize + ImageContext.SectionAlignment);\r | |
496 | DstBuffer = (UINTN)(-1);\r | |
497 | \r | |
498 | Status = SmmAllocatePages (\r | |
499 | AllocateMaxAddress,\r | |
500 | EfiRuntimeServicesCode,\r | |
501 | PageCount,\r | |
502 | &DstBuffer\r | |
503 | );\r | |
504 | if (EFI_ERROR (Status)) {\r | |
505 | if (Buffer != NULL) {\r | |
506 | gBS->FreePool (Buffer);\r | |
507 | }\r | |
508 | return Status;\r | |
509 | }\r | |
510 | \r | |
511 | ImageContext.ImageAddress = (EFI_PHYSICAL_ADDRESS)DstBuffer;\r | |
512 | }\r | |
513 | //\r | |
514 | // Align buffer on section boundary\r | |
515 | //\r | |
516 | ImageContext.ImageAddress += ImageContext.SectionAlignment - 1;\r | |
517 | ImageContext.ImageAddress &= ~((EFI_PHYSICAL_ADDRESS)ImageContext.SectionAlignment - 1);\r | |
518 | \r | |
519 | //\r | |
520 | // Load the image to our new buffer\r | |
521 | //\r | |
522 | Status = PeCoffLoaderLoadImage (&ImageContext);\r | |
523 | if (EFI_ERROR (Status)) {\r | |
524 | if (Buffer != NULL) {\r | |
525 | gBS->FreePool (Buffer);\r | |
526 | }\r | |
527 | SmmFreePages (DstBuffer, PageCount);\r | |
528 | return Status;\r | |
529 | }\r | |
530 | \r | |
531 | //\r | |
532 | // Relocate the image in our new buffer\r | |
533 | //\r | |
534 | Status = PeCoffLoaderRelocateImage (&ImageContext);\r | |
535 | if (EFI_ERROR (Status)) {\r | |
536 | if (Buffer != NULL) {\r | |
537 | gBS->FreePool (Buffer);\r | |
538 | }\r | |
539 | SmmFreePages (DstBuffer, PageCount);\r | |
540 | return Status;\r | |
541 | }\r | |
542 | \r | |
543 | //\r | |
544 | // Flush the instruction cache so the image data are written before we execute it\r | |
545 | //\r | |
546 | InvalidateInstructionCacheRange ((VOID *)(UINTN) ImageContext.ImageAddress, (UINTN) ImageContext.ImageSize);\r | |
547 | \r | |
548 | //\r | |
549 | // Save Image EntryPoint in DriverEntry\r | |
550 | //\r | |
551 | DriverEntry->ImageEntryPoint = ImageContext.EntryPoint;\r | |
552 | DriverEntry->ImageBuffer = DstBuffer;\r | |
553 | DriverEntry->NumberOfPage = PageCount;\r | |
554 | \r | |
555 | //\r | |
556 | // Allocate a Loaded Image Protocol in EfiBootServicesData\r | |
557 | //\r | |
558 | Status = gBS->AllocatePool (EfiBootServicesData, sizeof (EFI_LOADED_IMAGE_PROTOCOL), (VOID **)&DriverEntry->LoadedImage);\r | |
559 | if (EFI_ERROR (Status)) {\r | |
560 | if (Buffer != NULL) {\r | |
561 | gBS->FreePool (Buffer);\r | |
562 | }\r | |
563 | SmmFreePages (DstBuffer, PageCount);\r | |
564 | return Status;\r | |
565 | }\r | |
566 | \r | |
567 | ZeroMem (DriverEntry->LoadedImage, sizeof (EFI_LOADED_IMAGE_PROTOCOL));\r | |
568 | //\r | |
569 | // Fill in the remaining fields of the Loaded Image Protocol instance.\r | |
570 | // Note: ImageBase is an SMRAM address that can not be accessed outside of SMRAM if SMRAM window is closed.\r | |
571 | //\r | |
572 | DriverEntry->LoadedImage->Revision = EFI_LOADED_IMAGE_PROTOCOL_REVISION;\r | |
573 | DriverEntry->LoadedImage->ParentHandle = gSmmCorePrivate->SmmIplImageHandle;\r | |
574 | DriverEntry->LoadedImage->SystemTable = gST;\r | |
575 | DriverEntry->LoadedImage->DeviceHandle = DeviceHandle;\r | |
576 | \r | |
577 | DriverEntry->SmmLoadedImage.Revision = EFI_LOADED_IMAGE_PROTOCOL_REVISION;\r | |
578 | DriverEntry->SmmLoadedImage.ParentHandle = gSmmCorePrivate->SmmIplImageHandle;\r | |
579 | DriverEntry->SmmLoadedImage.SystemTable = gST;\r | |
580 | DriverEntry->SmmLoadedImage.DeviceHandle = DeviceHandle;\r | |
581 | \r | |
582 | //\r | |
583 | // Make an EfiBootServicesData buffer copy of FilePath\r | |
584 | //\r | |
585 | Status = gBS->AllocatePool (EfiBootServicesData, GetDevicePathSize (FilePath), (VOID **)&DriverEntry->LoadedImage->FilePath);\r | |
586 | if (EFI_ERROR (Status)) {\r | |
587 | if (Buffer != NULL) {\r | |
588 | gBS->FreePool (Buffer);\r | |
589 | }\r | |
590 | SmmFreePages (DstBuffer, PageCount);\r | |
591 | return Status;\r | |
592 | }\r | |
593 | CopyMem (DriverEntry->LoadedImage->FilePath, FilePath, GetDevicePathSize (FilePath));\r | |
594 | \r | |
595 | DriverEntry->LoadedImage->ImageBase = (VOID *)(UINTN) ImageContext.ImageAddress;\r | |
596 | DriverEntry->LoadedImage->ImageSize = ImageContext.ImageSize;\r | |
597 | DriverEntry->LoadedImage->ImageCodeType = EfiRuntimeServicesCode;\r | |
598 | DriverEntry->LoadedImage->ImageDataType = EfiRuntimeServicesData;\r | |
599 | \r | |
600 | //\r | |
601 | // Make a buffer copy of FilePath\r | |
602 | //\r | |
603 | Status = SmmAllocatePool (EfiRuntimeServicesData, GetDevicePathSize(FilePath), (VOID **)&DriverEntry->SmmLoadedImage.FilePath);\r | |
604 | if (EFI_ERROR (Status)) {\r | |
605 | if (Buffer != NULL) {\r | |
606 | gBS->FreePool (Buffer);\r | |
607 | }\r | |
608 | gBS->FreePool (DriverEntry->LoadedImage->FilePath);\r | |
609 | SmmFreePages (DstBuffer, PageCount);\r | |
610 | return Status;\r | |
611 | }\r | |
612 | CopyMem (DriverEntry->SmmLoadedImage.FilePath, FilePath, GetDevicePathSize(FilePath));\r | |
613 | \r | |
614 | DriverEntry->SmmLoadedImage.ImageBase = (VOID *)(UINTN) ImageContext.ImageAddress;\r | |
615 | DriverEntry->SmmLoadedImage.ImageSize = ImageContext.ImageSize;\r | |
616 | DriverEntry->SmmLoadedImage.ImageCodeType = EfiRuntimeServicesCode;\r | |
617 | DriverEntry->SmmLoadedImage.ImageDataType = EfiRuntimeServicesData;\r | |
618 | \r | |
619 | //\r | |
620 | // Create a new image handle in the UEFI handle database for the SMM Driver\r | |
621 | //\r | |
622 | DriverEntry->ImageHandle = NULL;\r | |
623 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
624 | &DriverEntry->ImageHandle,\r | |
625 | &gEfiLoadedImageProtocolGuid, DriverEntry->LoadedImage,\r | |
626 | NULL\r | |
627 | );\r | |
628 | \r | |
629 | //\r | |
630 | // Create a new image handle in the SMM handle database for the SMM Driver\r | |
631 | //\r | |
632 | DriverEntry->SmmImageHandle = NULL;\r | |
633 | Status = SmmInstallProtocolInterface (\r | |
634 | &DriverEntry->SmmImageHandle,\r | |
635 | &gEfiLoadedImageProtocolGuid,\r | |
636 | EFI_NATIVE_INTERFACE,\r | |
637 | &DriverEntry->SmmLoadedImage\r | |
638 | );\r | |
639 | \r | |
640 | PERF_LOAD_IMAGE_END (DriverEntry->ImageHandle);\r | |
641 | \r | |
642 | //\r | |
643 | // Print the load address and the PDB file name if it is available\r | |
644 | //\r | |
645 | \r | |
646 | DEBUG_CODE_BEGIN ();\r | |
647 | \r | |
648 | UINTN Index;\r | |
649 | UINTN StartIndex;\r | |
650 | CHAR8 EfiFileName[256];\r | |
651 | \r | |
652 | \r | |
653 | DEBUG ((DEBUG_INFO | DEBUG_LOAD,\r | |
654 | "Loading SMM driver at 0x%11p EntryPoint=0x%11p ",\r | |
655 | (VOID *)(UINTN) ImageContext.ImageAddress,\r | |
656 | FUNCTION_ENTRY_POINT (ImageContext.EntryPoint)));\r | |
657 | \r | |
658 | \r | |
659 | //\r | |
660 | // Print Module Name by Pdb file path.\r | |
661 | // Windows and Unix style file path are all trimmed correctly.\r | |
662 | //\r | |
663 | if (ImageContext.PdbPointer != NULL) {\r | |
664 | StartIndex = 0;\r | |
665 | for (Index = 0; ImageContext.PdbPointer[Index] != 0; Index++) {\r | |
666 | if ((ImageContext.PdbPointer[Index] == '\\') || (ImageContext.PdbPointer[Index] == '/')) {\r | |
667 | StartIndex = Index + 1;\r | |
668 | }\r | |
669 | }\r | |
670 | //\r | |
671 | // Copy the PDB file name to our temporary string, and replace .pdb with .efi\r | |
672 | // The PDB file name is limited in the range of 0~255.\r | |
673 | // If the length is bigger than 255, trim the redudant characters to avoid overflow in array boundary.\r | |
674 | //\r | |
675 | for (Index = 0; Index < sizeof (EfiFileName) - 4; Index++) {\r | |
676 | EfiFileName[Index] = ImageContext.PdbPointer[Index + StartIndex];\r | |
677 | if (EfiFileName[Index] == 0) {\r | |
678 | EfiFileName[Index] = '.';\r | |
679 | }\r | |
680 | if (EfiFileName[Index] == '.') {\r | |
681 | EfiFileName[Index + 1] = 'e';\r | |
682 | EfiFileName[Index + 2] = 'f';\r | |
683 | EfiFileName[Index + 3] = 'i';\r | |
684 | EfiFileName[Index + 4] = 0;\r | |
685 | break;\r | |
686 | }\r | |
687 | }\r | |
688 | \r | |
689 | if (Index == sizeof (EfiFileName) - 4) {\r | |
690 | EfiFileName[Index] = 0;\r | |
691 | }\r | |
692 | DEBUG ((DEBUG_INFO | DEBUG_LOAD, "%a", EfiFileName)); // &Image->ImageContext.PdbPointer[StartIndex]));\r | |
693 | }\r | |
694 | DEBUG ((DEBUG_INFO | DEBUG_LOAD, "\n"));\r | |
695 | \r | |
696 | DEBUG_CODE_END ();\r | |
697 | \r | |
698 | //\r | |
699 | // Free buffer allocated by Fv->ReadSection.\r | |
700 | //\r | |
701 | // The UEFI Boot Services FreePool() function must be used because Fv->ReadSection\r | |
702 | // used the UEFI Boot Services AllocatePool() function\r | |
703 | //\r | |
704 | Status = gBS->FreePool(Buffer);\r | |
705 | if (!EFI_ERROR (Status) && EFI_ERROR (SecurityStatus)) {\r | |
706 | Status = SecurityStatus;\r | |
707 | }\r | |
708 | return Status;\r | |
709 | }\r | |
710 | \r | |
711 | /**\r | |
712 | Preprocess dependency expression and update DriverEntry to reflect the\r | |
713 | state of Before and After dependencies. If DriverEntry->Before\r | |
714 | or DriverEntry->After is set it will never be cleared.\r | |
715 | \r | |
716 | @param DriverEntry DriverEntry element to update .\r | |
717 | \r | |
718 | @retval EFI_SUCCESS It always works.\r | |
719 | \r | |
720 | **/\r | |
721 | EFI_STATUS\r | |
722 | SmmPreProcessDepex (\r | |
723 | IN EFI_SMM_DRIVER_ENTRY *DriverEntry\r | |
724 | )\r | |
725 | {\r | |
726 | UINT8 *Iterator;\r | |
727 | \r | |
728 | Iterator = DriverEntry->Depex;\r | |
729 | DriverEntry->Dependent = TRUE;\r | |
730 | \r | |
731 | if (*Iterator == EFI_DEP_BEFORE) {\r | |
732 | DriverEntry->Before = TRUE;\r | |
733 | } else if (*Iterator == EFI_DEP_AFTER) {\r | |
734 | DriverEntry->After = TRUE;\r | |
735 | }\r | |
736 | \r | |
737 | if (DriverEntry->Before || DriverEntry->After) {\r | |
738 | CopyMem (&DriverEntry->BeforeAfterGuid, Iterator + 1, sizeof (EFI_GUID));\r | |
739 | }\r | |
740 | \r | |
741 | return EFI_SUCCESS;\r | |
742 | }\r | |
743 | \r | |
744 | /**\r | |
745 | Read Depex and pre-process the Depex for Before and After. If Section Extraction\r | |
746 | protocol returns an error via ReadSection defer the reading of the Depex.\r | |
747 | \r | |
748 | @param DriverEntry Driver to work on.\r | |
749 | \r | |
750 | @retval EFI_SUCCESS Depex read and preprossesed\r | |
751 | @retval EFI_PROTOCOL_ERROR The section extraction protocol returned an error\r | |
752 | and Depex reading needs to be retried.\r | |
753 | @retval Error DEPEX not found.\r | |
754 | \r | |
755 | **/\r | |
756 | EFI_STATUS\r | |
757 | SmmGetDepexSectionAndPreProccess (\r | |
758 | IN EFI_SMM_DRIVER_ENTRY *DriverEntry\r | |
759 | )\r | |
760 | {\r | |
761 | EFI_STATUS Status;\r | |
762 | EFI_SECTION_TYPE SectionType;\r | |
763 | UINT32 AuthenticationStatus;\r | |
764 | EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv;\r | |
765 | \r | |
766 | Fv = DriverEntry->Fv;\r | |
767 | \r | |
768 | //\r | |
769 | // Grab Depex info, it will never be free'ed.\r | |
770 | // (Note: DriverEntry->Depex is in DXE memory)\r | |
771 | //\r | |
772 | SectionType = EFI_SECTION_SMM_DEPEX;\r | |
773 | Status = Fv->ReadSection (\r | |
774 | DriverEntry->Fv,\r | |
775 | &DriverEntry->FileName,\r | |
776 | SectionType,\r | |
777 | 0,\r | |
778 | &DriverEntry->Depex,\r | |
779 | (UINTN *)&DriverEntry->DepexSize,\r | |
780 | &AuthenticationStatus\r | |
781 | );\r | |
782 | if (EFI_ERROR (Status)) {\r | |
783 | if (Status == EFI_PROTOCOL_ERROR) {\r | |
784 | //\r | |
785 | // The section extraction protocol failed so set protocol error flag\r | |
786 | //\r | |
787 | DriverEntry->DepexProtocolError = TRUE;\r | |
788 | } else {\r | |
789 | //\r | |
790 | // If no Depex assume depend on all architectural protocols\r | |
791 | //\r | |
792 | DriverEntry->Depex = NULL;\r | |
793 | DriverEntry->Dependent = TRUE;\r | |
794 | DriverEntry->DepexProtocolError = FALSE;\r | |
795 | }\r | |
796 | } else {\r | |
797 | //\r | |
798 | // Set Before and After state information based on Depex\r | |
799 | // Driver will be put in Dependent state\r | |
800 | //\r | |
801 | SmmPreProcessDepex (DriverEntry);\r | |
802 | DriverEntry->DepexProtocolError = FALSE;\r | |
803 | }\r | |
804 | \r | |
805 | return Status;\r | |
806 | }\r | |
807 | \r | |
808 | /**\r | |
809 | This is the main Dispatcher for SMM and it exits when there are no more\r | |
810 | drivers to run. Drain the mScheduledQueue and load and start a PE\r | |
811 | image for each driver. Search the mDiscoveredList to see if any driver can\r | |
812 | be placed on the mScheduledQueue. If no drivers are placed on the\r | |
813 | mScheduledQueue exit the function.\r | |
814 | \r | |
815 | @retval EFI_SUCCESS All of the SMM Drivers that could be dispatched\r | |
816 | have been run and the SMM Entry Point has been\r | |
817 | registered.\r | |
818 | @retval EFI_NOT_READY The SMM Driver that registered the SMM Entry Point\r | |
819 | was just dispatched.\r | |
820 | @retval EFI_NOT_FOUND There are no SMM Drivers available to be dispatched.\r | |
821 | @retval EFI_ALREADY_STARTED The SMM Dispatcher is already running\r | |
822 | \r | |
823 | **/\r | |
824 | EFI_STATUS\r | |
825 | SmmDispatcher (\r | |
826 | VOID\r | |
827 | )\r | |
828 | {\r | |
829 | EFI_STATUS Status;\r | |
830 | LIST_ENTRY *Link;\r | |
831 | EFI_SMM_DRIVER_ENTRY *DriverEntry;\r | |
832 | BOOLEAN ReadyToRun;\r | |
833 | BOOLEAN PreviousSmmEntryPointRegistered;\r | |
834 | \r | |
835 | if (!gRequestDispatch) {\r | |
836 | return EFI_NOT_FOUND;\r | |
837 | }\r | |
838 | \r | |
839 | if (gDispatcherRunning) {\r | |
840 | //\r | |
841 | // If the dispatcher is running don't let it be restarted.\r | |
842 | //\r | |
843 | return EFI_ALREADY_STARTED;\r | |
844 | }\r | |
845 | \r | |
846 | gDispatcherRunning = TRUE;\r | |
847 | \r | |
848 | do {\r | |
849 | //\r | |
850 | // Drain the Scheduled Queue\r | |
851 | //\r | |
852 | while (!IsListEmpty (&mScheduledQueue)) {\r | |
853 | DriverEntry = CR (\r | |
854 | mScheduledQueue.ForwardLink,\r | |
855 | EFI_SMM_DRIVER_ENTRY,\r | |
856 | ScheduledLink,\r | |
857 | EFI_SMM_DRIVER_ENTRY_SIGNATURE\r | |
858 | );\r | |
859 | \r | |
860 | //\r | |
861 | // Load the SMM Driver image into memory. If the Driver was transitioned from\r | |
862 | // Untrused to Scheduled it would have already been loaded so we may need to\r | |
863 | // skip the LoadImage\r | |
864 | //\r | |
865 | if (DriverEntry->ImageHandle == NULL) {\r | |
866 | Status = SmmLoadImage (DriverEntry);\r | |
867 | \r | |
868 | //\r | |
869 | // Update the driver state to reflect that it's been loaded\r | |
870 | //\r | |
871 | if (EFI_ERROR (Status)) {\r | |
872 | //\r | |
873 | // The SMM Driver could not be loaded, and do not attempt to load or start it again.\r | |
874 | // Take driver from Scheduled to Initialized.\r | |
875 | //\r | |
876 | DriverEntry->Initialized = TRUE;\r | |
877 | DriverEntry->Scheduled = FALSE;\r | |
878 | RemoveEntryList (&DriverEntry->ScheduledLink);\r | |
879 | \r | |
880 | //\r | |
881 | // If it's an error don't try the StartImage\r | |
882 | //\r | |
883 | continue;\r | |
884 | }\r | |
885 | }\r | |
886 | \r | |
887 | DriverEntry->Scheduled = FALSE;\r | |
888 | DriverEntry->Initialized = TRUE;\r | |
889 | RemoveEntryList (&DriverEntry->ScheduledLink);\r | |
890 | \r | |
891 | REPORT_STATUS_CODE_WITH_EXTENDED_DATA (\r | |
892 | EFI_PROGRESS_CODE,\r | |
893 | EFI_SOFTWARE_SMM_DRIVER | EFI_SW_PC_INIT_BEGIN,\r | |
894 | &DriverEntry->ImageHandle,\r | |
895 | sizeof (DriverEntry->ImageHandle)\r | |
896 | );\r | |
897 | \r | |
898 | //\r | |
899 | // Cache state of SmmEntryPointRegistered before calling entry point\r | |
900 | //\r | |
901 | PreviousSmmEntryPointRegistered = gSmmCorePrivate->SmmEntryPointRegistered;\r | |
902 | \r | |
903 | //\r | |
904 | // For each SMM driver, pass NULL as ImageHandle\r | |
905 | //\r | |
906 | RegisterSmramProfileImage (DriverEntry, TRUE);\r | |
907 | PERF_START_IMAGE_BEGIN (DriverEntry->ImageHandle);\r | |
908 | Status = ((EFI_IMAGE_ENTRY_POINT)(UINTN)DriverEntry->ImageEntryPoint)(DriverEntry->ImageHandle, gST);\r | |
909 | PERF_START_IMAGE_END (DriverEntry->ImageHandle);\r | |
910 | if (EFI_ERROR(Status)){\r | |
911 | UnregisterSmramProfileImage (DriverEntry, TRUE);\r | |
912 | SmmFreePages(DriverEntry->ImageBuffer, DriverEntry->NumberOfPage);\r | |
913 | //\r | |
914 | // Uninstall LoadedImage\r | |
915 | //\r | |
916 | Status = gBS->UninstallProtocolInterface (\r | |
917 | DriverEntry->ImageHandle,\r | |
918 | &gEfiLoadedImageProtocolGuid,\r | |
919 | DriverEntry->LoadedImage\r | |
920 | );\r | |
921 | if (!EFI_ERROR (Status)) {\r | |
922 | if (DriverEntry->LoadedImage->FilePath != NULL) {\r | |
923 | gBS->FreePool (DriverEntry->LoadedImage->FilePath);\r | |
924 | }\r | |
925 | gBS->FreePool (DriverEntry->LoadedImage);\r | |
926 | }\r | |
927 | Status = SmmUninstallProtocolInterface (\r | |
928 | DriverEntry->SmmImageHandle,\r | |
929 | &gEfiLoadedImageProtocolGuid,\r | |
930 | &DriverEntry->SmmLoadedImage\r | |
931 | );\r | |
932 | if (!EFI_ERROR(Status)) {\r | |
933 | if (DriverEntry->SmmLoadedImage.FilePath != NULL) {\r | |
934 | SmmFreePool (DriverEntry->SmmLoadedImage.FilePath);\r | |
935 | }\r | |
936 | }\r | |
937 | }\r | |
938 | \r | |
939 | REPORT_STATUS_CODE_WITH_EXTENDED_DATA (\r | |
940 | EFI_PROGRESS_CODE,\r | |
941 | EFI_SOFTWARE_SMM_DRIVER | EFI_SW_PC_INIT_END,\r | |
942 | &DriverEntry->ImageHandle,\r | |
943 | sizeof (DriverEntry->ImageHandle)\r | |
944 | );\r | |
945 | \r | |
946 | if (!PreviousSmmEntryPointRegistered && gSmmCorePrivate->SmmEntryPointRegistered) {\r | |
947 | //\r | |
948 | // Return immediately if the SMM Entry Point was registered by the SMM\r | |
949 | // Driver that was just dispatched. The SMM IPL will reinvoke the SMM\r | |
950 | // Core Dispatcher. This is required so SMM Mode may be enabled as soon\r | |
951 | // as all the dependent SMM Drivers for SMM Mode have been dispatched.\r | |
952 | // Once the SMM Entry Point has been registered, then SMM Mode will be\r | |
953 | // used.\r | |
954 | //\r | |
955 | gRequestDispatch = TRUE;\r | |
956 | gDispatcherRunning = FALSE;\r | |
957 | return EFI_NOT_READY;\r | |
958 | }\r | |
959 | }\r | |
960 | \r | |
961 | //\r | |
962 | // Search DriverList for items to place on Scheduled Queue\r | |
963 | //\r | |
964 | ReadyToRun = FALSE;\r | |
965 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
966 | DriverEntry = CR (Link, EFI_SMM_DRIVER_ENTRY, Link, EFI_SMM_DRIVER_ENTRY_SIGNATURE);\r | |
967 | \r | |
968 | if (DriverEntry->DepexProtocolError){\r | |
969 | //\r | |
970 | // If Section Extraction Protocol did not let the Depex be read before retry the read\r | |
971 | //\r | |
972 | Status = SmmGetDepexSectionAndPreProccess (DriverEntry);\r | |
973 | }\r | |
974 | \r | |
975 | if (DriverEntry->Dependent) {\r | |
976 | if (SmmIsSchedulable (DriverEntry)) {\r | |
977 | SmmInsertOnScheduledQueueWhileProcessingBeforeAndAfter (DriverEntry);\r | |
978 | ReadyToRun = TRUE;\r | |
979 | }\r | |
980 | }\r | |
981 | }\r | |
982 | } while (ReadyToRun);\r | |
983 | \r | |
984 | //\r | |
985 | // If there is no more SMM driver to dispatch, stop the dispatch request\r | |
986 | //\r | |
987 | gRequestDispatch = FALSE;\r | |
988 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
989 | DriverEntry = CR (Link, EFI_SMM_DRIVER_ENTRY, Link, EFI_SMM_DRIVER_ENTRY_SIGNATURE);\r | |
990 | \r | |
991 | if (!DriverEntry->Initialized){\r | |
992 | //\r | |
993 | // We have SMM driver pending to dispatch\r | |
994 | //\r | |
995 | gRequestDispatch = TRUE;\r | |
996 | break;\r | |
997 | }\r | |
998 | }\r | |
999 | \r | |
1000 | gDispatcherRunning = FALSE;\r | |
1001 | \r | |
1002 | return EFI_SUCCESS;\r | |
1003 | }\r | |
1004 | \r | |
1005 | /**\r | |
1006 | Insert InsertedDriverEntry onto the mScheduledQueue. To do this you\r | |
1007 | must add any driver with a before dependency on InsertedDriverEntry first.\r | |
1008 | You do this by recursively calling this routine. After all the Befores are\r | |
1009 | processed you can add InsertedDriverEntry to the mScheduledQueue.\r | |
1010 | Then you can add any driver with an After dependency on InsertedDriverEntry\r | |
1011 | by recursively calling this routine.\r | |
1012 | \r | |
1013 | @param InsertedDriverEntry The driver to insert on the ScheduledLink Queue\r | |
1014 | \r | |
1015 | **/\r | |
1016 | VOID\r | |
1017 | SmmInsertOnScheduledQueueWhileProcessingBeforeAndAfter (\r | |
1018 | IN EFI_SMM_DRIVER_ENTRY *InsertedDriverEntry\r | |
1019 | )\r | |
1020 | {\r | |
1021 | LIST_ENTRY *Link;\r | |
1022 | EFI_SMM_DRIVER_ENTRY *DriverEntry;\r | |
1023 | \r | |
1024 | //\r | |
1025 | // Process Before Dependency\r | |
1026 | //\r | |
1027 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
1028 | DriverEntry = CR(Link, EFI_SMM_DRIVER_ENTRY, Link, EFI_SMM_DRIVER_ENTRY_SIGNATURE);\r | |
1029 | if (DriverEntry->Before && DriverEntry->Dependent && DriverEntry != InsertedDriverEntry) {\r | |
1030 | DEBUG ((DEBUG_DISPATCH, "Evaluate SMM DEPEX for FFS(%g)\n", &DriverEntry->FileName));\r | |
1031 | DEBUG ((DEBUG_DISPATCH, " BEFORE FFS(%g) = ", &DriverEntry->BeforeAfterGuid));\r | |
1032 | if (CompareGuid (&InsertedDriverEntry->FileName, &DriverEntry->BeforeAfterGuid)) {\r | |
1033 | //\r | |
1034 | // Recursively process BEFORE\r | |
1035 | //\r | |
1036 | DEBUG ((DEBUG_DISPATCH, "TRUE\n END\n RESULT = TRUE\n"));\r | |
1037 | SmmInsertOnScheduledQueueWhileProcessingBeforeAndAfter (DriverEntry);\r | |
1038 | } else {\r | |
1039 | DEBUG ((DEBUG_DISPATCH, "FALSE\n END\n RESULT = FALSE\n"));\r | |
1040 | }\r | |
1041 | }\r | |
1042 | }\r | |
1043 | \r | |
1044 | //\r | |
1045 | // Convert driver from Dependent to Scheduled state\r | |
1046 | //\r | |
1047 | \r | |
1048 | InsertedDriverEntry->Dependent = FALSE;\r | |
1049 | InsertedDriverEntry->Scheduled = TRUE;\r | |
1050 | InsertTailList (&mScheduledQueue, &InsertedDriverEntry->ScheduledLink);\r | |
1051 | \r | |
1052 | \r | |
1053 | //\r | |
1054 | // Process After Dependency\r | |
1055 | //\r | |
1056 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
1057 | DriverEntry = CR(Link, EFI_SMM_DRIVER_ENTRY, Link, EFI_SMM_DRIVER_ENTRY_SIGNATURE);\r | |
1058 | if (DriverEntry->After && DriverEntry->Dependent && DriverEntry != InsertedDriverEntry) {\r | |
1059 | DEBUG ((DEBUG_DISPATCH, "Evaluate SMM DEPEX for FFS(%g)\n", &DriverEntry->FileName));\r | |
1060 | DEBUG ((DEBUG_DISPATCH, " AFTER FFS(%g) = ", &DriverEntry->BeforeAfterGuid));\r | |
1061 | if (CompareGuid (&InsertedDriverEntry->FileName, &DriverEntry->BeforeAfterGuid)) {\r | |
1062 | //\r | |
1063 | // Recursively process AFTER\r | |
1064 | //\r | |
1065 | DEBUG ((DEBUG_DISPATCH, "TRUE\n END\n RESULT = TRUE\n"));\r | |
1066 | SmmInsertOnScheduledQueueWhileProcessingBeforeAndAfter (DriverEntry);\r | |
1067 | } else {\r | |
1068 | DEBUG ((DEBUG_DISPATCH, "FALSE\n END\n RESULT = FALSE\n"));\r | |
1069 | }\r | |
1070 | }\r | |
1071 | }\r | |
1072 | }\r | |
1073 | \r | |
1074 | /**\r | |
1075 | Return TRUE if the Fv has been processed, FALSE if not.\r | |
1076 | \r | |
1077 | @param FvHandle The handle of a FV that's being tested\r | |
1078 | \r | |
1079 | @retval TRUE Fv protocol on FvHandle has been processed\r | |
1080 | @retval FALSE Fv protocol on FvHandle has not yet been\r | |
1081 | processed\r | |
1082 | \r | |
1083 | **/\r | |
1084 | BOOLEAN\r | |
1085 | FvHasBeenProcessed (\r | |
1086 | IN EFI_HANDLE FvHandle\r | |
1087 | )\r | |
1088 | {\r | |
1089 | LIST_ENTRY *Link;\r | |
1090 | KNOWN_HANDLE *KnownHandle;\r | |
1091 | \r | |
1092 | for (Link = mFvHandleList.ForwardLink; Link != &mFvHandleList; Link = Link->ForwardLink) {\r | |
1093 | KnownHandle = CR(Link, KNOWN_HANDLE, Link, KNOWN_HANDLE_SIGNATURE);\r | |
1094 | if (KnownHandle->Handle == FvHandle) {\r | |
1095 | return TRUE;\r | |
1096 | }\r | |
1097 | }\r | |
1098 | return FALSE;\r | |
1099 | }\r | |
1100 | \r | |
1101 | /**\r | |
1102 | Remember that Fv protocol on FvHandle has had it's drivers placed on the\r | |
1103 | mDiscoveredList. This fucntion adds entries on the mFvHandleList. Items are\r | |
1104 | never removed/freed from the mFvHandleList.\r | |
1105 | \r | |
1106 | @param FvHandle The handle of a FV that has been processed\r | |
1107 | \r | |
1108 | **/\r | |
1109 | VOID\r | |
1110 | FvIsBeingProcesssed (\r | |
1111 | IN EFI_HANDLE FvHandle\r | |
1112 | )\r | |
1113 | {\r | |
1114 | KNOWN_HANDLE *KnownHandle;\r | |
1115 | \r | |
1116 | KnownHandle = AllocatePool (sizeof (KNOWN_HANDLE));\r | |
1117 | ASSERT (KnownHandle != NULL);\r | |
1118 | \r | |
1119 | KnownHandle->Signature = KNOWN_HANDLE_SIGNATURE;\r | |
1120 | KnownHandle->Handle = FvHandle;\r | |
1121 | InsertTailList (&mFvHandleList, &KnownHandle->Link);\r | |
1122 | }\r | |
1123 | \r | |
1124 | /**\r | |
1125 | Convert FvHandle and DriverName into an EFI device path\r | |
1126 | \r | |
1127 | @param Fv Fv protocol, needed to read Depex info out of\r | |
1128 | FLASH.\r | |
1129 | @param FvHandle Handle for Fv, needed in the\r | |
1130 | EFI_SMM_DRIVER_ENTRY so that the PE image can be\r | |
1131 | read out of the FV at a later time.\r | |
1132 | @param DriverName Name of driver to add to mDiscoveredList.\r | |
1133 | \r | |
1134 | @return Pointer to device path constructed from FvHandle and DriverName\r | |
1135 | \r | |
1136 | **/\r | |
1137 | EFI_DEVICE_PATH_PROTOCOL *\r | |
1138 | SmmFvToDevicePath (\r | |
1139 | IN EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv,\r | |
1140 | IN EFI_HANDLE FvHandle,\r | |
1141 | IN EFI_GUID *DriverName\r | |
1142 | )\r | |
1143 | {\r | |
1144 | EFI_STATUS Status;\r | |
1145 | EFI_DEVICE_PATH_PROTOCOL *FvDevicePath;\r | |
1146 | EFI_DEVICE_PATH_PROTOCOL *FileNameDevicePath;\r | |
1147 | \r | |
1148 | //\r | |
1149 | // Remember the device path of the FV\r | |
1150 | //\r | |
1151 | Status = gBS->HandleProtocol (FvHandle, &gEfiDevicePathProtocolGuid, (VOID **)&FvDevicePath);\r | |
1152 | if (EFI_ERROR (Status)) {\r | |
1153 | FileNameDevicePath = NULL;\r | |
1154 | } else {\r | |
1155 | //\r | |
1156 | // Build a device path to the file in the FV to pass into gBS->LoadImage\r | |
1157 | //\r | |
1158 | EfiInitializeFwVolDevicepathNode (&mFvDevicePath.File, DriverName);\r | |
1159 | SetDevicePathEndNode (&mFvDevicePath.End);\r | |
1160 | \r | |
1161 | //\r | |
1162 | // Note: FileNameDevicePath is in DXE memory\r | |
1163 | //\r | |
1164 | FileNameDevicePath = AppendDevicePath (\r | |
1165 | FvDevicePath,\r | |
1166 | (EFI_DEVICE_PATH_PROTOCOL *)&mFvDevicePath\r | |
1167 | );\r | |
1168 | }\r | |
1169 | return FileNameDevicePath;\r | |
1170 | }\r | |
1171 | \r | |
1172 | /**\r | |
1173 | Add an entry to the mDiscoveredList. Allocate memory to store the DriverEntry,\r | |
1174 | and initilize any state variables. Read the Depex from the FV and store it\r | |
1175 | in DriverEntry. Pre-process the Depex to set the Before and After state.\r | |
1176 | The Discovered list is never free'ed and contains booleans that represent the\r | |
1177 | other possible SMM driver states.\r | |
1178 | \r | |
1179 | @param Fv Fv protocol, needed to read Depex info out of\r | |
1180 | FLASH.\r | |
1181 | @param FvHandle Handle for Fv, needed in the\r | |
1182 | EFI_SMM_DRIVER_ENTRY so that the PE image can be\r | |
1183 | read out of the FV at a later time.\r | |
1184 | @param DriverName Name of driver to add to mDiscoveredList.\r | |
1185 | \r | |
1186 | @retval EFI_SUCCESS If driver was added to the mDiscoveredList.\r | |
1187 | @retval EFI_ALREADY_STARTED The driver has already been started. Only one\r | |
1188 | DriverName may be active in the system at any one\r | |
1189 | time.\r | |
1190 | \r | |
1191 | **/\r | |
1192 | EFI_STATUS\r | |
1193 | SmmAddToDriverList (\r | |
1194 | IN EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv,\r | |
1195 | IN EFI_HANDLE FvHandle,\r | |
1196 | IN EFI_GUID *DriverName\r | |
1197 | )\r | |
1198 | {\r | |
1199 | EFI_SMM_DRIVER_ENTRY *DriverEntry;\r | |
1200 | \r | |
1201 | //\r | |
1202 | // Create the Driver Entry for the list. ZeroPool initializes lots of variables to\r | |
1203 | // NULL or FALSE.\r | |
1204 | //\r | |
1205 | DriverEntry = AllocateZeroPool (sizeof (EFI_SMM_DRIVER_ENTRY));\r | |
1206 | ASSERT (DriverEntry != NULL);\r | |
1207 | \r | |
1208 | DriverEntry->Signature = EFI_SMM_DRIVER_ENTRY_SIGNATURE;\r | |
1209 | CopyGuid (&DriverEntry->FileName, DriverName);\r | |
1210 | DriverEntry->FvHandle = FvHandle;\r | |
1211 | DriverEntry->Fv = Fv;\r | |
1212 | DriverEntry->FvFileDevicePath = SmmFvToDevicePath (Fv, FvHandle, DriverName);\r | |
1213 | \r | |
1214 | SmmGetDepexSectionAndPreProccess (DriverEntry);\r | |
1215 | \r | |
1216 | InsertTailList (&mDiscoveredList, &DriverEntry->Link);\r | |
1217 | gRequestDispatch = TRUE;\r | |
1218 | \r | |
1219 | return EFI_SUCCESS;\r | |
1220 | }\r | |
1221 | \r | |
1222 | /**\r | |
1223 | This function is the main entry point for an SMM handler dispatch\r | |
1224 | or communicate-based callback.\r | |
1225 | \r | |
1226 | Event notification that is fired every time a FV dispatch protocol is added.\r | |
1227 | More than one protocol may have been added when this event is fired, so you\r | |
1228 | must loop on SmmLocateHandle () to see how many protocols were added and\r | |
1229 | do the following to each FV:\r | |
1230 | If the Fv has already been processed, skip it. If the Fv has not been\r | |
1231 | processed then mark it as being processed, as we are about to process it.\r | |
1232 | Read the Fv and add any driver in the Fv to the mDiscoveredList.The\r | |
1233 | mDiscoveredList is never free'ed and contains variables that define\r | |
1234 | the other states the SMM driver transitions to..\r | |
1235 | While you are at it read the A Priori file into memory.\r | |
1236 | Place drivers in the A Priori list onto the mScheduledQueue.\r | |
1237 | \r | |
1238 | @param DispatchHandle The unique handle assigned to this handler by SmiHandlerRegister().\r | |
1239 | @param Context Points to an optional handler context which was specified when the handler was registered.\r | |
1240 | @param CommBuffer A pointer to a collection of data in memory that will\r | |
1241 | be conveyed from a non-SMM environment into an SMM environment.\r | |
1242 | @param CommBufferSize The size of the CommBuffer.\r | |
1243 | \r | |
1244 | @return Status Code\r | |
1245 | \r | |
1246 | **/\r | |
1247 | EFI_STATUS\r | |
1248 | EFIAPI\r | |
1249 | SmmDriverDispatchHandler (\r | |
1250 | IN EFI_HANDLE DispatchHandle,\r | |
1251 | IN CONST VOID *Context, OPTIONAL\r | |
1252 | IN OUT VOID *CommBuffer, OPTIONAL\r | |
1253 | IN OUT UINTN *CommBufferSize OPTIONAL\r | |
1254 | )\r | |
1255 | {\r | |
1256 | EFI_STATUS Status;\r | |
1257 | UINTN HandleCount;\r | |
1258 | EFI_HANDLE *HandleBuffer;\r | |
1259 | EFI_STATUS GetNextFileStatus;\r | |
1260 | EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv;\r | |
1261 | EFI_DEVICE_PATH_PROTOCOL *FvDevicePath;\r | |
1262 | EFI_HANDLE FvHandle;\r | |
1263 | EFI_GUID NameGuid;\r | |
1264 | UINTN Key;\r | |
1265 | EFI_FV_FILETYPE Type;\r | |
1266 | EFI_FV_FILE_ATTRIBUTES Attributes;\r | |
1267 | UINTN Size;\r | |
1268 | EFI_SMM_DRIVER_ENTRY *DriverEntry;\r | |
1269 | EFI_GUID *AprioriFile;\r | |
1270 | UINTN AprioriEntryCount;\r | |
1271 | UINTN HandleIndex;\r | |
1272 | UINTN SmmTypeIndex;\r | |
1273 | UINTN AprioriIndex;\r | |
1274 | LIST_ENTRY *Link;\r | |
1275 | UINT32 AuthenticationStatus;\r | |
1276 | UINTN SizeOfBuffer;\r | |
1277 | \r | |
1278 | HandleBuffer = NULL;\r | |
1279 | Status = gBS->LocateHandleBuffer (\r | |
1280 | ByProtocol,\r | |
1281 | &gEfiFirmwareVolume2ProtocolGuid,\r | |
1282 | NULL,\r | |
1283 | &HandleCount,\r | |
1284 | &HandleBuffer\r | |
1285 | );\r | |
1286 | if (EFI_ERROR (Status)) {\r | |
1287 | return EFI_NOT_FOUND;\r | |
1288 | }\r | |
1289 | \r | |
1290 | for (HandleIndex = 0; HandleIndex < HandleCount; HandleIndex++) {\r | |
1291 | FvHandle = HandleBuffer[HandleIndex];\r | |
1292 | \r | |
1293 | if (FvHasBeenProcessed (FvHandle)) {\r | |
1294 | //\r | |
1295 | // This Fv has already been processed so lets skip it!\r | |
1296 | //\r | |
1297 | continue;\r | |
1298 | }\r | |
1299 | \r | |
1300 | //\r | |
1301 | // Since we are about to process this Fv mark it as processed.\r | |
1302 | //\r | |
1303 | FvIsBeingProcesssed (FvHandle);\r | |
1304 | \r | |
1305 | Status = gBS->HandleProtocol (FvHandle, &gEfiFirmwareVolume2ProtocolGuid, (VOID **)&Fv);\r | |
1306 | if (EFI_ERROR (Status)) {\r | |
1307 | //\r | |
1308 | // FvHandle must have a Firmware Volume2 Protocol thus we should never get here.\r | |
1309 | //\r | |
1310 | ASSERT (FALSE);\r | |
1311 | continue;\r | |
1312 | }\r | |
1313 | \r | |
1314 | Status = gBS->HandleProtocol (FvHandle, &gEfiDevicePathProtocolGuid, (VOID **)&FvDevicePath);\r | |
1315 | if (EFI_ERROR (Status)) {\r | |
1316 | //\r | |
1317 | // The Firmware volume doesn't have device path, can't be dispatched.\r | |
1318 | //\r | |
1319 | continue;\r | |
1320 | }\r | |
1321 | \r | |
1322 | //\r | |
1323 | // Discover Drivers in FV and add them to the Discovered Driver List.\r | |
1324 | // Process EFI_FV_FILETYPE_SMM type and then EFI_FV_FILETYPE_COMBINED_SMM_DXE\r | |
1325 | // EFI_FV_FILETYPE_SMM_CORE is processed to produce a Loaded Image protocol for the core\r | |
1326 | //\r | |
1327 | for (SmmTypeIndex = 0; SmmTypeIndex < sizeof (mSmmFileTypes)/sizeof (EFI_FV_FILETYPE); SmmTypeIndex++) {\r | |
1328 | //\r | |
1329 | // Initialize the search key\r | |
1330 | //\r | |
1331 | Key = 0;\r | |
1332 | do {\r | |
1333 | Type = mSmmFileTypes[SmmTypeIndex];\r | |
1334 | GetNextFileStatus = Fv->GetNextFile (\r | |
1335 | Fv,\r | |
1336 | &Key,\r | |
1337 | &Type,\r | |
1338 | &NameGuid,\r | |
1339 | &Attributes,\r | |
1340 | &Size\r | |
1341 | );\r | |
1342 | if (!EFI_ERROR (GetNextFileStatus)) {\r | |
1343 | if (Type == EFI_FV_FILETYPE_SMM_CORE) {\r | |
1344 | //\r | |
1345 | // If this is the SMM core fill in it's DevicePath & DeviceHandle\r | |
1346 | //\r | |
1347 | if (mSmmCoreLoadedImage->FilePath == NULL) {\r | |
1348 | //\r | |
1349 | // Maybe one special FV contains only one SMM_CORE module, so its device path must\r | |
1350 | // be initialized completely.\r | |
1351 | //\r | |
1352 | EfiInitializeFwVolDevicepathNode (&mFvDevicePath.File, &NameGuid);\r | |
1353 | SetDevicePathEndNode (&mFvDevicePath.End);\r | |
1354 | \r | |
1355 | //\r | |
1356 | // Make an EfiBootServicesData buffer copy of FilePath\r | |
1357 | //\r | |
1358 | Status = gBS->AllocatePool (\r | |
1359 | EfiBootServicesData,\r | |
1360 | GetDevicePathSize ((EFI_DEVICE_PATH_PROTOCOL *)&mFvDevicePath),\r | |
1361 | (VOID **)&mSmmCoreLoadedImage->FilePath\r | |
1362 | );\r | |
1363 | ASSERT_EFI_ERROR (Status);\r | |
1364 | CopyMem (mSmmCoreLoadedImage->FilePath, &mFvDevicePath, GetDevicePathSize ((EFI_DEVICE_PATH_PROTOCOL *)&mFvDevicePath));\r | |
1365 | \r | |
1366 | mSmmCoreLoadedImage->DeviceHandle = FvHandle;\r | |
1367 | }\r | |
1368 | if (mSmmCoreDriverEntry->SmmLoadedImage.FilePath == NULL) {\r | |
1369 | //\r | |
1370 | // Maybe one special FV contains only one SMM_CORE module, so its device path must\r | |
1371 | // be initialized completely.\r | |
1372 | //\r | |
1373 | EfiInitializeFwVolDevicepathNode (&mFvDevicePath.File, &NameGuid);\r | |
1374 | SetDevicePathEndNode (&mFvDevicePath.End);\r | |
1375 | \r | |
1376 | //\r | |
1377 | // Make a buffer copy FilePath\r | |
1378 | //\r | |
1379 | Status = SmmAllocatePool (\r | |
1380 | EfiRuntimeServicesData,\r | |
1381 | GetDevicePathSize ((EFI_DEVICE_PATH_PROTOCOL *)&mFvDevicePath),\r | |
1382 | (VOID **)&mSmmCoreDriverEntry->SmmLoadedImage.FilePath\r | |
1383 | );\r | |
1384 | ASSERT_EFI_ERROR (Status);\r | |
1385 | CopyMem (mSmmCoreDriverEntry->SmmLoadedImage.FilePath, &mFvDevicePath, GetDevicePathSize((EFI_DEVICE_PATH_PROTOCOL *)&mFvDevicePath));\r | |
1386 | \r | |
1387 | mSmmCoreDriverEntry->SmmLoadedImage.DeviceHandle = FvHandle;\r | |
1388 | }\r | |
1389 | } else {\r | |
1390 | SmmAddToDriverList (Fv, FvHandle, &NameGuid);\r | |
1391 | }\r | |
1392 | }\r | |
1393 | } while (!EFI_ERROR (GetNextFileStatus));\r | |
1394 | }\r | |
1395 | \r | |
1396 | //\r | |
1397 | // Read the array of GUIDs from the Apriori file if it is present in the firmware volume\r | |
1398 | // (Note: AprioriFile is in DXE memory)\r | |
1399 | //\r | |
1400 | AprioriFile = NULL;\r | |
1401 | Status = Fv->ReadSection (\r | |
1402 | Fv,\r | |
1403 | &gAprioriGuid,\r | |
1404 | EFI_SECTION_RAW,\r | |
1405 | 0,\r | |
1406 | (VOID **)&AprioriFile,\r | |
1407 | &SizeOfBuffer,\r | |
1408 | &AuthenticationStatus\r | |
1409 | );\r | |
1410 | if (!EFI_ERROR (Status)) {\r | |
1411 | AprioriEntryCount = SizeOfBuffer / sizeof (EFI_GUID);\r | |
1412 | } else {\r | |
1413 | AprioriEntryCount = 0;\r | |
1414 | }\r | |
1415 | \r | |
1416 | //\r | |
1417 | // Put drivers on Apriori List on the Scheduled queue. The Discovered List includes\r | |
1418 | // drivers not in the current FV and these must be skipped since the a priori list\r | |
1419 | // is only valid for the FV that it resided in.\r | |
1420 | //\r | |
1421 | \r | |
1422 | for (AprioriIndex = 0; AprioriIndex < AprioriEntryCount; AprioriIndex++) {\r | |
1423 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
1424 | DriverEntry = CR(Link, EFI_SMM_DRIVER_ENTRY, Link, EFI_SMM_DRIVER_ENTRY_SIGNATURE);\r | |
1425 | if (CompareGuid (&DriverEntry->FileName, &AprioriFile[AprioriIndex]) &&\r | |
1426 | (FvHandle == DriverEntry->FvHandle)) {\r | |
1427 | DriverEntry->Dependent = FALSE;\r | |
1428 | DriverEntry->Scheduled = TRUE;\r | |
1429 | InsertTailList (&mScheduledQueue, &DriverEntry->ScheduledLink);\r | |
1430 | DEBUG ((DEBUG_DISPATCH, "Evaluate SMM DEPEX for FFS(%g)\n", &DriverEntry->FileName));\r | |
1431 | DEBUG ((DEBUG_DISPATCH, " RESULT = TRUE (Apriori)\n"));\r | |
1432 | break;\r | |
1433 | }\r | |
1434 | }\r | |
1435 | }\r | |
1436 | \r | |
1437 | //\r | |
1438 | // Free data allocated by Fv->ReadSection ()\r | |
1439 | //\r | |
1440 | // The UEFI Boot Services FreePool() function must be used because Fv->ReadSection\r | |
1441 | // used the UEFI Boot Services AllocatePool() function\r | |
1442 | //\r | |
1443 | gBS->FreePool (AprioriFile);\r | |
1444 | }\r | |
1445 | \r | |
1446 | //\r | |
1447 | // Execute the SMM Dispatcher on any newly discovered FVs and previously\r | |
1448 | // discovered SMM drivers that have been discovered but not dispatched.\r | |
1449 | //\r | |
1450 | Status = SmmDispatcher ();\r | |
1451 | \r | |
1452 | //\r | |
1453 | // Check to see if CommBuffer and CommBufferSize are valid\r | |
1454 | //\r | |
1455 | if (CommBuffer != NULL && CommBufferSize != NULL) {\r | |
1456 | if (*CommBufferSize > 0) {\r | |
1457 | if (Status == EFI_NOT_READY) {\r | |
1458 | //\r | |
1459 | // If a the SMM Core Entry Point was just registered, then set flag to\r | |
1460 | // request the SMM Dispatcher to be restarted.\r | |
1461 | //\r | |
1462 | *(UINT8 *)CommBuffer = COMM_BUFFER_SMM_DISPATCH_RESTART;\r | |
1463 | } else if (!EFI_ERROR (Status)) {\r | |
1464 | //\r | |
1465 | // Set the flag to show that the SMM Dispatcher executed without errors\r | |
1466 | //\r | |
1467 | *(UINT8 *)CommBuffer = COMM_BUFFER_SMM_DISPATCH_SUCCESS;\r | |
1468 | } else {\r | |
1469 | //\r | |
1470 | // Set the flag to show that the SMM Dispatcher encountered an error\r | |
1471 | //\r | |
1472 | *(UINT8 *)CommBuffer = COMM_BUFFER_SMM_DISPATCH_ERROR;\r | |
1473 | }\r | |
1474 | }\r | |
1475 | }\r | |
1476 | \r | |
1477 | return EFI_SUCCESS;\r | |
1478 | }\r | |
1479 | \r | |
1480 | /**\r | |
1481 | Traverse the discovered list for any drivers that were discovered but not loaded\r | |
1482 | because the dependency experessions evaluated to false.\r | |
1483 | \r | |
1484 | **/\r | |
1485 | VOID\r | |
1486 | SmmDisplayDiscoveredNotDispatched (\r | |
1487 | VOID\r | |
1488 | )\r | |
1489 | {\r | |
1490 | LIST_ENTRY *Link;\r | |
1491 | EFI_SMM_DRIVER_ENTRY *DriverEntry;\r | |
1492 | \r | |
1493 | for (Link = mDiscoveredList.ForwardLink;Link !=&mDiscoveredList; Link = Link->ForwardLink) {\r | |
1494 | DriverEntry = CR(Link, EFI_SMM_DRIVER_ENTRY, Link, EFI_SMM_DRIVER_ENTRY_SIGNATURE);\r | |
1495 | if (DriverEntry->Dependent) {\r | |
1496 | DEBUG ((DEBUG_LOAD, "SMM Driver %g was discovered but not loaded!!\n", &DriverEntry->FileName));\r | |
1497 | }\r | |
1498 | }\r | |
1499 | }\r |