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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 | |
bc2dfdbc | 123 | EFI_SECURITY2_ARCH_PROTOCOL *mSecurity2 = NULL;\r |
e42e9404 | 124 | \r |
3c447c27 | 125 | //\r |
126 | // The global variable is defined for Loading modules at fixed address feature to track the SMM code\r | |
127 | // memory range usage. It is a bit mapped array in which every bit indicates the correspoding \r | |
128 | // memory page available or not. \r | |
129 | //\r | |
130 | GLOBAL_REMOVE_IF_UNREFERENCED UINT64 *mSmmCodeMemoryRangeUsageBitMap=NULL;\r | |
131 | \r | |
132 | /**\r | |
133 | 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 | |
134 | memory range is avaliable, the function will mark the correponding bits to 1 which indicates the memory range is used.\r | |
135 | The function is only invoked when load modules at fixed address feature is enabled. \r | |
136 | \r | |
137 | @param ImageBase The base addres the image will be loaded at.\r | |
138 | @param ImageSize The size of the image\r | |
139 | \r | |
140 | @retval EFI_SUCCESS The memory range the image will be loaded in is available\r | |
141 | @retval EFI_NOT_FOUND The memory range the image will be loaded in is not available\r | |
142 | **/\r | |
143 | EFI_STATUS\r | |
144 | CheckAndMarkFixLoadingMemoryUsageBitMap (\r | |
145 | IN EFI_PHYSICAL_ADDRESS ImageBase,\r | |
146 | IN UINTN ImageSize\r | |
147 | )\r | |
148 | {\r | |
149 | UINT32 SmmCodePageNumber;\r | |
150 | UINT64 SmmCodeSize; \r | |
151 | EFI_PHYSICAL_ADDRESS SmmCodeBase;\r | |
152 | UINTN BaseOffsetPageNumber;\r | |
153 | UINTN TopOffsetPageNumber;\r | |
154 | UINTN Index;\r | |
155 | //\r | |
156 | // Build tool will calculate the smm code size and then patch the PcdLoadFixAddressSmmCodePageNumber\r | |
157 | //\r | |
158 | SmmCodePageNumber = PcdGet32(PcdLoadFixAddressSmmCodePageNumber);\r | |
159 | SmmCodeSize = EFI_PAGES_TO_SIZE (SmmCodePageNumber);\r | |
160 | SmmCodeBase = gLoadModuleAtFixAddressSmramBase;\r | |
161 | \r | |
162 | //\r | |
163 | // If the memory usage bit map is not initialized, do it. Every bit in the array \r | |
164 | // indicate the status of the corresponding memory page, available or not\r | |
165 | // \r | |
166 | if (mSmmCodeMemoryRangeUsageBitMap == NULL) {\r | |
167 | mSmmCodeMemoryRangeUsageBitMap = AllocateZeroPool(((SmmCodePageNumber / 64) + 1)*sizeof(UINT64));\r | |
168 | }\r | |
169 | //\r | |
170 | // If the Dxe code memory range is not allocated or the bit map array allocation failed, return EFI_NOT_FOUND\r | |
171 | //\r | |
172 | if (mSmmCodeMemoryRangeUsageBitMap == NULL) {\r | |
173 | return EFI_NOT_FOUND;\r | |
174 | }\r | |
175 | //\r | |
176 | // see if the memory range for loading the image is in the SMM code range.\r | |
177 | //\r | |
178 | if (SmmCodeBase + SmmCodeSize < ImageBase + ImageSize || SmmCodeBase > ImageBase) {\r | |
179 | return EFI_NOT_FOUND; \r | |
180 | } \r | |
181 | //\r | |
182 | // Test if the memory is avalaible or not.\r | |
183 | // \r | |
184 | BaseOffsetPageNumber = (UINTN)EFI_SIZE_TO_PAGES((UINT32)(ImageBase - SmmCodeBase));\r | |
185 | TopOffsetPageNumber = (UINTN)EFI_SIZE_TO_PAGES((UINT32)(ImageBase + ImageSize - SmmCodeBase));\r | |
186 | for (Index = BaseOffsetPageNumber; Index < TopOffsetPageNumber; Index ++) {\r | |
187 | if ((mSmmCodeMemoryRangeUsageBitMap[Index / 64] & LShiftU64(1, (Index % 64))) != 0) {\r | |
188 | //\r | |
189 | // This page is already used.\r | |
190 | //\r | |
191 | return EFI_NOT_FOUND; \r | |
192 | }\r | |
193 | }\r | |
194 | \r | |
195 | //\r | |
196 | // Being here means the memory range is available. So mark the bits for the memory range\r | |
197 | // \r | |
198 | for (Index = BaseOffsetPageNumber; Index < TopOffsetPageNumber; Index ++) {\r | |
199 | mSmmCodeMemoryRangeUsageBitMap[Index / 64] |= LShiftU64(1, (Index % 64));\r | |
200 | }\r | |
201 | return EFI_SUCCESS; \r | |
202 | }\r | |
203 | /**\r | |
204 | Get the fixed loadding address from image header assigned by build tool. This function only be called \r | |
205 | when Loading module at Fixed address feature enabled.\r | |
206 | \r | |
207 | @param ImageContext Pointer to the image context structure that describes the PE/COFF\r | |
208 | image that needs to be examined by this function.\r | |
209 | @retval EFI_SUCCESS An fixed loading address is assigned to this image by build tools .\r | |
210 | @retval EFI_NOT_FOUND The image has no assigned fixed loadding address.\r | |
211 | \r | |
212 | **/\r | |
213 | EFI_STATUS\r | |
214 | GetPeCoffImageFixLoadingAssignedAddress(\r | |
215 | IN OUT PE_COFF_LOADER_IMAGE_CONTEXT *ImageContext\r | |
216 | )\r | |
217 | {\r | |
218 | UINTN SectionHeaderOffset;\r | |
219 | EFI_STATUS Status;\r | |
220 | EFI_IMAGE_SECTION_HEADER SectionHeader;\r | |
221 | EFI_IMAGE_OPTIONAL_HEADER_UNION *ImgHdr;\r | |
222 | EFI_PHYSICAL_ADDRESS FixLoaddingAddress;\r | |
223 | UINT16 Index;\r | |
224 | UINTN Size; \r | |
225 | UINT16 NumberOfSections;\r | |
226 | UINT64 ValueInSectionHeader;\r | |
227 | \r | |
228 | FixLoaddingAddress = 0;\r | |
229 | Status = EFI_NOT_FOUND;\r | |
230 | \r | |
231 | //\r | |
232 | // Get PeHeader pointer\r | |
233 | //\r | |
234 | ImgHdr = (EFI_IMAGE_OPTIONAL_HEADER_UNION *)((CHAR8* )ImageContext->Handle + ImageContext->PeCoffHeaderOffset);\r | |
235 | SectionHeaderOffset = (UINTN)(\r | |
236 | ImageContext->PeCoffHeaderOffset +\r | |
237 | sizeof (UINT32) +\r | |
238 | sizeof (EFI_IMAGE_FILE_HEADER) +\r | |
239 | ImgHdr->Pe32.FileHeader.SizeOfOptionalHeader\r | |
240 | );\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 fileds 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 uild tool saves the\r | |
274 | // offset to SMRAM base as image base in PointerToRelocations & PointerToLineNumbers fields\r | |
275 | // \r | |
276 | FixLoaddingAddress = (EFI_PHYSICAL_ADDRESS)(gLoadModuleAtFixAddressSmramBase + (INT64)ValueInSectionHeader);\r | |
277 | //\r | |
278 | // Check if the memory range is avaliable.\r | |
279 | //\r | |
280 | Status = CheckAndMarkFixLoadingMemoryUsageBitMap (FixLoaddingAddress, (UINTN)(ImageContext->ImageSize + ImageContext->SectionAlignment));\r | |
281 | if (!EFI_ERROR(Status)) {\r | |
282 | //\r | |
283 | // The assigned address is valid. Return the specified loadding address\r | |
284 | //\r | |
285 | ImageContext->ImageAddress = FixLoaddingAddress;\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", FixLoaddingAddress, Status));\r | |
293 | return Status;\r | |
294 | }\r | |
e42e9404 | 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 | |
c2cb08df LG |
324 | UINT64 Tick;\r |
325 | \r | |
326 | Tick = 0;\r | |
327 | PERF_CODE (\r | |
328 | Tick = GetPerformanceCounter ();\r | |
329 | );\r | |
e42e9404 | 330 | \r |
331 | Buffer = NULL;\r | |
332 | Size = 0;\r | |
333 | Fv = DriverEntry->Fv;\r | |
334 | NameGuid = &DriverEntry->FileName;\r | |
335 | FilePath = DriverEntry->FvFileDevicePath;\r | |
336 | \r | |
337 | OriginalFilePath = FilePath;\r | |
338 | HandleFilePath = FilePath;\r | |
339 | DeviceHandle = NULL;\r | |
340 | SecurityStatus = EFI_SUCCESS;\r | |
341 | Status = EFI_SUCCESS;\r | |
342 | AuthenticationStatus = 0;\r | |
343 | \r | |
344 | //\r | |
345 | // Try to get the image device handle by checking the match protocol.\r | |
346 | //\r | |
347 | Status = gBS->LocateDevicePath (&gEfiFirmwareVolume2ProtocolGuid, &HandleFilePath, &DeviceHandle);\r | |
348 | if (EFI_ERROR(Status)) {\r | |
349 | return Status;\r | |
350 | }\r | |
351 | \r | |
352 | //\r | |
bc2dfdbc | 353 | // If the Security2 and Security Architectural Protocol has not been located yet, then attempt to locate it\r |
e42e9404 | 354 | //\r |
bc2dfdbc LG |
355 | if (mSecurity2 == NULL) {\r |
356 | gBS->LocateProtocol (&gEfiSecurity2ArchProtocolGuid, NULL, (VOID**)&mSecurity2);\r | |
357 | }\r | |
e42e9404 | 358 | if (mSecurity == NULL) {\r |
359 | gBS->LocateProtocol (&gEfiSecurityArchProtocolGuid, NULL, (VOID**)&mSecurity);\r | |
360 | }\r | |
e42e9404 | 361 | //\r |
bc2dfdbc | 362 | // When Security2 is installed, Security Architectural Protocol must be published.\r |
e42e9404 | 363 | //\r |
bc2dfdbc LG |
364 | ASSERT (mSecurity2 == NULL || mSecurity != NULL);\r |
365 | \r | |
e42e9404 | 366 | //\r |
367 | // Pull out just the file portion of the DevicePath for the LoadedImage FilePath\r | |
368 | //\r | |
369 | FilePath = OriginalFilePath;\r | |
370 | Status = gBS->HandleProtocol (DeviceHandle, &gEfiDevicePathProtocolGuid, (VOID **)&HandleFilePath);\r | |
371 | if (!EFI_ERROR (Status)) {\r | |
372 | FilePathSize = GetDevicePathSize (HandleFilePath) - sizeof(EFI_DEVICE_PATH_PROTOCOL);\r | |
373 | FilePath = (EFI_DEVICE_PATH_PROTOCOL *) (((UINT8 *)FilePath) + FilePathSize );\r | |
374 | }\r | |
375 | \r | |
376 | //\r | |
377 | // Try reading PE32 section firstly\r | |
378 | //\r | |
379 | Status = Fv->ReadSection (\r | |
380 | Fv,\r | |
381 | NameGuid,\r | |
382 | EFI_SECTION_PE32,\r | |
383 | 0,\r | |
384 | &Buffer,\r | |
385 | &Size,\r | |
386 | &AuthenticationStatus\r | |
387 | );\r | |
388 | \r | |
389 | if (EFI_ERROR (Status)) {\r | |
390 | //\r | |
391 | // Try reading TE section secondly\r | |
392 | //\r | |
393 | Buffer = NULL;\r | |
394 | Size = 0;\r | |
395 | Status = Fv->ReadSection (\r | |
396 | Fv,\r | |
397 | NameGuid,\r | |
398 | EFI_SECTION_TE,\r | |
399 | 0,\r | |
400 | &Buffer,\r | |
401 | &Size,\r | |
402 | &AuthenticationStatus\r | |
403 | );\r | |
404 | }\r | |
405 | \r | |
406 | if (EFI_ERROR (Status)) {\r | |
407 | if (Buffer != NULL) {\r | |
b08b7ba4 | 408 | gBS->FreePool (Buffer);\r |
e42e9404 | 409 | }\r |
410 | return Status;\r | |
411 | }\r | |
412 | \r | |
bc2dfdbc LG |
413 | //\r |
414 | // Verify File Authentication through the Security2 Architectural Protocol\r | |
415 | //\r | |
416 | if (mSecurity2 != NULL) {\r | |
417 | SecurityStatus = mSecurity2->FileAuthentication (\r | |
418 | mSecurity2,\r | |
419 | OriginalFilePath,\r | |
420 | Buffer,\r | |
421 | Size,\r | |
422 | FALSE\r | |
423 | );\r | |
424 | }\r | |
425 | \r | |
426 | //\r | |
427 | // Verify the Authentication Status through the Security Architectural Protocol\r | |
428 | // Only on images that have been read using Firmware Volume protocol.\r | |
429 | // All SMM images are from FV protocol. \r | |
430 | //\r | |
431 | if (!EFI_ERROR (SecurityStatus) && (mSecurity != NULL)) {\r | |
432 | SecurityStatus = mSecurity->FileAuthenticationState (\r | |
433 | mSecurity,\r | |
434 | AuthenticationStatus,\r | |
435 | OriginalFilePath\r | |
436 | );\r | |
437 | }\r | |
438 | \r | |
439 | if (EFI_ERROR (SecurityStatus) && SecurityStatus != EFI_SECURITY_VIOLATION) {\r | |
440 | Status = SecurityStatus;\r | |
441 | return Status;\r | |
442 | }\r | |
443 | \r | |
e42e9404 | 444 | //\r |
445 | // Initialize ImageContext\r | |
446 | //\r | |
447 | ImageContext.Handle = Buffer;\r | |
448 | ImageContext.ImageRead = PeCoffLoaderImageReadFromMemory;\r | |
449 | \r | |
450 | //\r | |
451 | // Get information about the image being loaded\r | |
452 | //\r | |
453 | Status = PeCoffLoaderGetImageInfo (&ImageContext);\r | |
454 | if (EFI_ERROR (Status)) {\r | |
455 | if (Buffer != NULL) {\r | |
b08b7ba4 | 456 | gBS->FreePool (Buffer);\r |
e42e9404 | 457 | }\r |
458 | return Status;\r | |
459 | }\r | |
3c447c27 | 460 | //\r |
461 | // if Loading module at Fixed Address feature is enabled, then cut out a memory range started from TESG BASE\r | |
462 | // to hold the Smm driver code\r | |
463 | //\r | |
464 | if (PcdGet64(PcdLoadModuleAtFixAddressEnable) != 0) {\r | |
465 | //\r | |
466 | // Get the fixed loading address assigned by Build tool\r | |
467 | //\r | |
468 | Status = GetPeCoffImageFixLoadingAssignedAddress (&ImageContext);\r | |
469 | if (!EFI_ERROR (Status)) {\r | |
470 | //\r | |
471 | // Since the memory range to load Smm core alreay been cut out, so no need to allocate and free this range\r | |
472 | // following statements is to bypass SmmFreePages\r | |
473 | //\r | |
474 | PageCount = 0;\r | |
475 | DstBuffer = (UINTN)gLoadModuleAtFixAddressSmramBase; \r | |
476 | } else {\r | |
477 | DEBUG ((EFI_D_INFO|EFI_D_LOAD, "LOADING MODULE FIXED ERROR: Failed to load module at fixed address. \n"));\r | |
478 | //\r | |
479 | // allocate the memory to load the SMM driver\r | |
480 | //\r | |
e0e7f80c | 481 | PageCount = (UINTN)EFI_SIZE_TO_PAGES((UINTN)ImageContext.ImageSize + ImageContext.SectionAlignment);\r |
3c447c27 | 482 | DstBuffer = (UINTN)(-1);\r |
483 | \r | |
484 | Status = SmmAllocatePages (\r | |
485 | AllocateMaxAddress,\r | |
486 | EfiRuntimeServicesCode,\r | |
487 | PageCount,\r | |
488 | &DstBuffer\r | |
489 | );\r | |
490 | if (EFI_ERROR (Status)) {\r | |
491 | if (Buffer != NULL) {\r | |
b08b7ba4 | 492 | gBS->FreePool (Buffer);\r |
3c447c27 | 493 | } \r |
494 | return Status;\r | |
495 | } \r | |
496 | ImageContext.ImageAddress = (EFI_PHYSICAL_ADDRESS)DstBuffer;\r | |
e42e9404 | 497 | }\r |
3c447c27 | 498 | } else {\r |
e0e7f80c | 499 | PageCount = (UINTN)EFI_SIZE_TO_PAGES((UINTN)ImageContext.ImageSize + ImageContext.SectionAlignment);\r |
3c447c27 | 500 | DstBuffer = (UINTN)(-1);\r |
501 | \r | |
502 | Status = SmmAllocatePages (\r | |
503 | AllocateMaxAddress,\r | |
504 | EfiRuntimeServicesCode,\r | |
505 | PageCount,\r | |
506 | &DstBuffer\r | |
507 | );\r | |
508 | if (EFI_ERROR (Status)) {\r | |
509 | if (Buffer != NULL) {\r | |
b08b7ba4 | 510 | gBS->FreePool (Buffer);\r |
3c447c27 | 511 | }\r |
512 | return Status;\r | |
513 | }\r | |
514 | \r | |
515 | ImageContext.ImageAddress = (EFI_PHYSICAL_ADDRESS)DstBuffer;\r | |
e42e9404 | 516 | }\r |
e42e9404 | 517 | //\r |
518 | // Align buffer on section boundry\r | |
519 | //\r | |
520 | ImageContext.ImageAddress += ImageContext.SectionAlignment - 1;\r | |
521 | ImageContext.ImageAddress &= ~(ImageContext.SectionAlignment - 1);\r | |
522 | \r | |
523 | //\r | |
524 | // Load the image to our new buffer\r | |
525 | //\r | |
526 | Status = PeCoffLoaderLoadImage (&ImageContext);\r | |
527 | if (EFI_ERROR (Status)) {\r | |
528 | if (Buffer != NULL) {\r | |
b08b7ba4 | 529 | gBS->FreePool (Buffer);\r |
e42e9404 | 530 | }\r |
531 | SmmFreePages (DstBuffer, PageCount);\r | |
532 | return Status;\r | |
533 | }\r | |
534 | \r | |
535 | //\r | |
536 | // Relocate the image in our new buffer\r | |
537 | //\r | |
538 | Status = PeCoffLoaderRelocateImage (&ImageContext);\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 | // Flush the instruction cache so the image data are written before we execute it\r | |
549 | //\r | |
550 | InvalidateInstructionCacheRange ((VOID *)(UINTN) ImageContext.ImageAddress, (UINTN) ImageContext.ImageSize);\r | |
551 | \r | |
552 | //\r | |
553 | // Save Image EntryPoint in DriverEntry\r | |
554 | //\r | |
555 | DriverEntry->ImageEntryPoint = ImageContext.EntryPoint;\r | |
556 | DriverEntry->ImageBuffer = DstBuffer; \r | |
557 | DriverEntry->NumberOfPage = PageCount;\r | |
558 | \r | |
559 | //\r | |
560 | // Allocate a Loaded Image Protocol in EfiBootServicesData\r | |
561 | //\r | |
562 | Status = gBS->AllocatePool (EfiBootServicesData, sizeof (EFI_LOADED_IMAGE_PROTOCOL), (VOID **)&DriverEntry->LoadedImage);\r | |
563 | if (EFI_ERROR (Status)) {\r | |
564 | if (Buffer != NULL) {\r | |
b08b7ba4 | 565 | gBS->FreePool (Buffer);\r |
e42e9404 | 566 | }\r |
567 | SmmFreePages (DstBuffer, PageCount);\r | |
568 | return Status;\r | |
569 | }\r | |
570 | \r | |
571 | //\r | |
572 | // Fill in the remaining fields of the Loaded Image Protocol instance.\r | |
573 | // Note: ImageBase is an SMRAM address that can not be accessed outside of SMRAM if SMRAM window is closed.\r | |
574 | //\r | |
575 | DriverEntry->LoadedImage->Revision = EFI_LOADED_IMAGE_PROTOCOL_REVISION;\r | |
576 | DriverEntry->LoadedImage->ParentHandle = gSmmCorePrivate->SmmIplImageHandle;\r | |
577 | DriverEntry->LoadedImage->SystemTable = gST;\r | |
578 | DriverEntry->LoadedImage->DeviceHandle = DeviceHandle;\r | |
579 | \r | |
580 | //\r | |
581 | // Make an EfiBootServicesData buffer copy of FilePath\r | |
582 | //\r | |
583 | Status = gBS->AllocatePool (EfiBootServicesData, GetDevicePathSize (FilePath), (VOID **)&DriverEntry->LoadedImage->FilePath);\r | |
584 | if (EFI_ERROR (Status)) {\r | |
585 | if (Buffer != NULL) {\r | |
b08b7ba4 | 586 | gBS->FreePool (Buffer);\r |
e42e9404 | 587 | }\r |
588 | SmmFreePages (DstBuffer, PageCount);\r | |
589 | return Status;\r | |
590 | }\r | |
591 | CopyMem (DriverEntry->LoadedImage->FilePath, FilePath, GetDevicePathSize (FilePath));\r | |
592 | \r | |
593 | DriverEntry->LoadedImage->ImageBase = (VOID *)(UINTN)DriverEntry->ImageBuffer;\r | |
594 | DriverEntry->LoadedImage->ImageSize = ImageContext.ImageSize;\r | |
595 | DriverEntry->LoadedImage->ImageCodeType = EfiRuntimeServicesCode;\r | |
596 | DriverEntry->LoadedImage->ImageDataType = EfiRuntimeServicesData;\r | |
597 | \r | |
598 | //\r | |
599 | // Create a new image handle in the UEFI handle database for the SMM Driver\r | |
600 | //\r | |
601 | DriverEntry->ImageHandle = NULL;\r | |
602 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
603 | &DriverEntry->ImageHandle,\r | |
604 | &gEfiLoadedImageProtocolGuid, DriverEntry->LoadedImage,\r | |
605 | NULL\r | |
606 | );\r | |
607 | \r | |
c2cb08df LG |
608 | PERF_START (DriverEntry->ImageHandle, "LoadImage:", NULL, Tick);\r |
609 | PERF_END (DriverEntry->ImageHandle, "LoadImage:", NULL, 0);\r | |
610 | \r | |
e42e9404 | 611 | //\r |
612 | // Print the load address and the PDB file name if it is available\r | |
613 | //\r | |
614 | \r | |
615 | DEBUG_CODE_BEGIN ();\r | |
616 | \r | |
617 | UINTN Index;\r | |
618 | UINTN StartIndex;\r | |
619 | CHAR8 EfiFileName[256];\r | |
620 | \r | |
621 | \r | |
622 | DEBUG ((DEBUG_INFO | DEBUG_LOAD,\r | |
9a33a65e | 623 | "Loading SMM driver at 0x%11p EntryPoint=0x%11p ",\r |
e42e9404 | 624 | (VOID *)(UINTN) ImageContext.ImageAddress,\r |
625 | FUNCTION_ENTRY_POINT (ImageContext.EntryPoint)));\r | |
626 | \r | |
627 | \r | |
628 | //\r | |
629 | // Print Module Name by Pdb file path.\r | |
630 | // Windows and Unix style file path are all trimmed correctly.\r | |
631 | //\r | |
632 | if (ImageContext.PdbPointer != NULL) {\r | |
633 | StartIndex = 0;\r | |
634 | for (Index = 0; ImageContext.PdbPointer[Index] != 0; Index++) {\r | |
635 | if ((ImageContext.PdbPointer[Index] == '\\') || (ImageContext.PdbPointer[Index] == '/')) {\r | |
636 | StartIndex = Index + 1;\r | |
637 | }\r | |
638 | }\r | |
639 | //\r | |
640 | // Copy the PDB file name to our temporary string, and replace .pdb with .efi\r | |
641 | // The PDB file name is limited in the range of 0~255.\r | |
642 | // If the length is bigger than 255, trim the redudant characters to avoid overflow in array boundary.\r | |
643 | //\r | |
644 | for (Index = 0; Index < sizeof (EfiFileName) - 4; Index++) {\r | |
645 | EfiFileName[Index] = ImageContext.PdbPointer[Index + StartIndex];\r | |
646 | if (EfiFileName[Index] == 0) {\r | |
647 | EfiFileName[Index] = '.';\r | |
648 | }\r | |
649 | if (EfiFileName[Index] == '.') {\r | |
650 | EfiFileName[Index + 1] = 'e';\r | |
651 | EfiFileName[Index + 2] = 'f';\r | |
652 | EfiFileName[Index + 3] = 'i';\r | |
653 | EfiFileName[Index + 4] = 0;\r | |
654 | break;\r | |
655 | }\r | |
656 | }\r | |
657 | \r | |
658 | if (Index == sizeof (EfiFileName) - 4) {\r | |
659 | EfiFileName[Index] = 0;\r | |
660 | }\r | |
661 | DEBUG ((DEBUG_INFO | DEBUG_LOAD, "%a", EfiFileName)); // &Image->ImageContext.PdbPointer[StartIndex]));\r | |
662 | }\r | |
663 | DEBUG ((DEBUG_INFO | DEBUG_LOAD, "\n"));\r | |
664 | \r | |
665 | DEBUG_CODE_END ();\r | |
666 | \r | |
667 | //\r | |
668 | // Free buffer allocated by Fv->ReadSection.\r | |
669 | //\r | |
670 | // The UEFI Boot Services FreePool() function must be used because Fv->ReadSection \r | |
671 | // used the UEFI Boot Services AllocatePool() function\r | |
672 | //\r | |
673 | Status = gBS->FreePool(Buffer);\r | |
674 | return Status; \r | |
675 | }\r | |
676 | \r | |
677 | /**\r | |
678 | Preprocess dependency expression and update DriverEntry to reflect the\r | |
fa542a1e | 679 | state of Before and After dependencies. If DriverEntry->Before\r |
680 | or DriverEntry->After is set it will never be cleared. \r | |
e42e9404 | 681 | \r |
682 | @param DriverEntry DriverEntry element to update .\r | |
683 | \r | |
684 | @retval EFI_SUCCESS It always works.\r | |
685 | \r | |
686 | **/\r | |
687 | EFI_STATUS\r | |
688 | SmmPreProcessDepex (\r | |
689 | IN EFI_SMM_DRIVER_ENTRY *DriverEntry\r | |
690 | )\r | |
691 | {\r | |
692 | UINT8 *Iterator;\r | |
693 | \r | |
694 | Iterator = DriverEntry->Depex;\r | |
fa542a1e | 695 | DriverEntry->Dependent = TRUE;\r |
e42e9404 | 696 | \r |
697 | if (*Iterator == EFI_DEP_BEFORE) {\r | |
698 | DriverEntry->Before = TRUE;\r | |
699 | } else if (*Iterator == EFI_DEP_AFTER) {\r | |
700 | DriverEntry->After = TRUE;\r | |
701 | }\r | |
702 | \r | |
703 | if (DriverEntry->Before || DriverEntry->After) {\r | |
704 | CopyMem (&DriverEntry->BeforeAfterGuid, Iterator + 1, sizeof (EFI_GUID));\r | |
705 | }\r | |
706 | \r | |
707 | return EFI_SUCCESS;\r | |
708 | }\r | |
709 | \r | |
710 | /**\r | |
711 | Read Depex and pre-process the Depex for Before and After. If Section Extraction\r | |
712 | protocol returns an error via ReadSection defer the reading of the Depex.\r | |
713 | \r | |
714 | @param DriverEntry Driver to work on.\r | |
715 | \r | |
716 | @retval EFI_SUCCESS Depex read and preprossesed\r | |
717 | @retval EFI_PROTOCOL_ERROR The section extraction protocol returned an error\r | |
718 | and Depex reading needs to be retried.\r | |
719 | @retval Error DEPEX not found.\r | |
720 | \r | |
721 | **/\r | |
722 | EFI_STATUS\r | |
723 | SmmGetDepexSectionAndPreProccess (\r | |
724 | IN EFI_SMM_DRIVER_ENTRY *DriverEntry\r | |
725 | )\r | |
726 | {\r | |
727 | EFI_STATUS Status;\r | |
728 | EFI_SECTION_TYPE SectionType;\r | |
729 | UINT32 AuthenticationStatus;\r | |
730 | EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv;\r | |
731 | \r | |
732 | Fv = DriverEntry->Fv;\r | |
733 | \r | |
734 | //\r | |
735 | // Grab Depex info, it will never be free'ed.\r | |
736 | // (Note: DriverEntry->Depex is in DXE memory)\r | |
737 | //\r | |
738 | SectionType = EFI_SECTION_SMM_DEPEX;\r | |
739 | Status = Fv->ReadSection (\r | |
740 | DriverEntry->Fv,\r | |
741 | &DriverEntry->FileName,\r | |
742 | SectionType,\r | |
743 | 0,\r | |
744 | &DriverEntry->Depex,\r | |
745 | (UINTN *)&DriverEntry->DepexSize,\r | |
746 | &AuthenticationStatus\r | |
747 | );\r | |
748 | if (EFI_ERROR (Status)) {\r | |
749 | if (Status == EFI_PROTOCOL_ERROR) {\r | |
750 | //\r | |
751 | // The section extraction protocol failed so set protocol error flag\r | |
752 | //\r | |
753 | DriverEntry->DepexProtocolError = TRUE;\r | |
754 | } else {\r | |
755 | //\r | |
756 | // If no Depex assume depend on all architectural protocols\r | |
757 | //\r | |
758 | DriverEntry->Depex = NULL;\r | |
759 | DriverEntry->Dependent = TRUE;\r | |
760 | DriverEntry->DepexProtocolError = FALSE;\r | |
761 | }\r | |
762 | } else {\r | |
763 | //\r | |
fa542a1e | 764 | // Set Before and After state information based on Depex\r |
765 | // Driver will be put in Dependent state\r | |
e42e9404 | 766 | //\r |
767 | SmmPreProcessDepex (DriverEntry);\r | |
768 | DriverEntry->DepexProtocolError = FALSE;\r | |
769 | }\r | |
770 | \r | |
771 | return Status;\r | |
772 | }\r | |
773 | \r | |
e42e9404 | 774 | /**\r |
775 | This is the main Dispatcher for SMM and it exits when there are no more\r | |
776 | drivers to run. Drain the mScheduledQueue and load and start a PE\r | |
777 | image for each driver. Search the mDiscoveredList to see if any driver can\r | |
778 | be placed on the mScheduledQueue. If no drivers are placed on the\r | |
5657b268 | 779 | mScheduledQueue exit the function. \r |
780 | \r | |
781 | @retval EFI_SUCCESS All of the SMM Drivers that could be dispatched\r | |
782 | have been run and the SMM Entry Point has been\r | |
783 | registered.\r | |
784 | @retval EFI_NOT_READY The SMM Driver that registered the SMM Entry Point\r | |
785 | was just dispatched.\r | |
786 | @retval EFI_NOT_FOUND There are no SMM Drivers available to be dispatched.\r | |
e42e9404 | 787 | @retval EFI_ALREADY_STARTED The SMM Dispatcher is already running\r |
e42e9404 | 788 | \r |
789 | **/\r | |
790 | EFI_STATUS\r | |
791 | SmmDispatcher (\r | |
792 | VOID\r | |
793 | )\r | |
794 | {\r | |
795 | EFI_STATUS Status;\r | |
e42e9404 | 796 | LIST_ENTRY *Link;\r |
797 | EFI_SMM_DRIVER_ENTRY *DriverEntry;\r | |
798 | BOOLEAN ReadyToRun;\r | |
5657b268 | 799 | BOOLEAN PreviousSmmEntryPointRegistered;\r |
e42e9404 | 800 | \r |
801 | if (!gRequestDispatch) {\r | |
802 | return EFI_NOT_FOUND;\r | |
803 | }\r | |
804 | \r | |
805 | if (gDispatcherRunning) {\r | |
806 | //\r | |
807 | // If the dispatcher is running don't let it be restarted.\r | |
808 | //\r | |
809 | return EFI_ALREADY_STARTED;\r | |
810 | }\r | |
811 | \r | |
812 | gDispatcherRunning = TRUE;\r | |
813 | \r | |
e42e9404 | 814 | do {\r |
815 | //\r | |
816 | // Drain the Scheduled Queue\r | |
817 | //\r | |
818 | while (!IsListEmpty (&mScheduledQueue)) {\r | |
819 | DriverEntry = CR (\r | |
820 | mScheduledQueue.ForwardLink,\r | |
821 | EFI_SMM_DRIVER_ENTRY,\r | |
822 | ScheduledLink,\r | |
823 | EFI_SMM_DRIVER_ENTRY_SIGNATURE\r | |
824 | );\r | |
825 | \r | |
826 | //\r | |
827 | // Load the SMM Driver image into memory. If the Driver was transitioned from\r | |
828 | // Untrused to Scheduled it would have already been loaded so we may need to\r | |
829 | // skip the LoadImage\r | |
830 | //\r | |
831 | if (DriverEntry->ImageHandle == NULL) {\r | |
832 | Status = SmmLoadImage (DriverEntry);\r | |
833 | \r | |
834 | //\r | |
835 | // Update the driver state to reflect that it's been loaded\r | |
836 | //\r | |
837 | if (EFI_ERROR (Status)) {\r | |
fa542a1e | 838 | //\r |
839 | // The SMM Driver could not be loaded, and do not attempt to load or start it again.\r | |
840 | // Take driver from Scheduled to Initialized.\r | |
841 | //\r | |
842 | DriverEntry->Initialized = TRUE;\r | |
e42e9404 | 843 | DriverEntry->Scheduled = FALSE;\r |
844 | RemoveEntryList (&DriverEntry->ScheduledLink);\r | |
845 | \r | |
846 | //\r | |
847 | // If it's an error don't try the StartImage\r | |
848 | //\r | |
849 | continue;\r | |
850 | }\r | |
851 | }\r | |
852 | \r | |
853 | DriverEntry->Scheduled = FALSE;\r | |
854 | DriverEntry->Initialized = TRUE;\r | |
855 | RemoveEntryList (&DriverEntry->ScheduledLink);\r | |
856 | \r | |
857 | REPORT_STATUS_CODE_WITH_EXTENDED_DATA (\r | |
858 | EFI_PROGRESS_CODE,\r | |
859 | EFI_SOFTWARE_SMM_DRIVER | EFI_SW_PC_INIT_BEGIN,\r | |
860 | &DriverEntry->ImageHandle,\r | |
861 | sizeof (DriverEntry->ImageHandle)\r | |
862 | );\r | |
863 | \r | |
5657b268 | 864 | //\r |
865 | // Cache state of SmmEntryPointRegistered before calling entry point\r | |
866 | //\r | |
867 | PreviousSmmEntryPointRegistered = gSmmCorePrivate->SmmEntryPointRegistered;\r | |
868 | \r | |
e42e9404 | 869 | //\r |
870 | // For each SMM driver, pass NULL as ImageHandle\r | |
871 | //\r | |
c2cb08df | 872 | PERF_START (DriverEntry->ImageHandle, "StartImage:", NULL, 0);\r |
e42e9404 | 873 | Status = ((EFI_IMAGE_ENTRY_POINT)(UINTN)DriverEntry->ImageEntryPoint)(DriverEntry->ImageHandle, gST);\r |
c2cb08df | 874 | PERF_END (DriverEntry->ImageHandle, "StartImage:", NULL, 0);\r |
e42e9404 | 875 | if (EFI_ERROR(Status)){\r |
876 | SmmFreePages(DriverEntry->ImageBuffer, DriverEntry->NumberOfPage);\r | |
877 | }\r | |
878 | \r | |
879 | REPORT_STATUS_CODE_WITH_EXTENDED_DATA (\r | |
880 | EFI_PROGRESS_CODE,\r | |
881 | EFI_SOFTWARE_SMM_DRIVER | EFI_SW_PC_INIT_END,\r | |
882 | &DriverEntry->ImageHandle,\r | |
883 | sizeof (DriverEntry->ImageHandle)\r | |
884 | );\r | |
885 | \r | |
5657b268 | 886 | if (!PreviousSmmEntryPointRegistered && gSmmCorePrivate->SmmEntryPointRegistered) {\r |
887 | //\r | |
888 | // Return immediately if the SMM Entry Point was registered by the SMM \r | |
889 | // Driver that was just dispatched. The SMM IPL will reinvoke the SMM\r | |
890 | // Core Dispatcher. This is required so SMM Mode may be enabled as soon \r | |
891 | // as all the dependent SMM Drivers for SMM Mode have been dispatched. \r | |
892 | // Once the SMM Entry Point has been registered, then SMM Mode will be \r | |
893 | // used.\r | |
894 | //\r | |
895 | gRequestDispatch = TRUE;\r | |
896 | gDispatcherRunning = FALSE;\r | |
897 | return EFI_NOT_READY;\r | |
898 | }\r | |
e42e9404 | 899 | }\r |
900 | \r | |
901 | //\r | |
902 | // Search DriverList for items to place on Scheduled Queue\r | |
903 | //\r | |
904 | ReadyToRun = FALSE;\r | |
905 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
906 | DriverEntry = CR (Link, EFI_SMM_DRIVER_ENTRY, Link, EFI_SMM_DRIVER_ENTRY_SIGNATURE);\r | |
907 | \r | |
908 | if (DriverEntry->DepexProtocolError){\r | |
909 | //\r | |
910 | // If Section Extraction Protocol did not let the Depex be read before retry the read\r | |
911 | //\r | |
912 | Status = SmmGetDepexSectionAndPreProccess (DriverEntry);\r | |
913 | }\r | |
914 | \r | |
915 | if (DriverEntry->Dependent) {\r | |
916 | if (SmmIsSchedulable (DriverEntry)) {\r | |
917 | SmmInsertOnScheduledQueueWhileProcessingBeforeAndAfter (DriverEntry);\r | |
918 | ReadyToRun = TRUE;\r | |
919 | }\r | |
920 | }\r | |
921 | }\r | |
922 | } while (ReadyToRun);\r | |
923 | \r | |
924 | //\r | |
925 | // If there is no more SMM driver to dispatch, stop the dispatch request\r | |
926 | //\r | |
927 | gRequestDispatch = FALSE;\r | |
928 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
929 | DriverEntry = CR (Link, EFI_SMM_DRIVER_ENTRY, Link, EFI_SMM_DRIVER_ENTRY_SIGNATURE);\r | |
930 | \r | |
931 | if (!DriverEntry->Initialized){\r | |
932 | //\r | |
933 | // We have SMM driver pending to dispatch\r | |
934 | //\r | |
935 | gRequestDispatch = TRUE;\r | |
936 | break;\r | |
937 | }\r | |
938 | }\r | |
939 | \r | |
940 | gDispatcherRunning = FALSE;\r | |
941 | \r | |
5657b268 | 942 | return EFI_SUCCESS;\r |
e42e9404 | 943 | }\r |
944 | \r | |
945 | /**\r | |
946 | Insert InsertedDriverEntry onto the mScheduledQueue. To do this you\r | |
947 | must add any driver with a before dependency on InsertedDriverEntry first.\r | |
948 | You do this by recursively calling this routine. After all the Befores are\r | |
949 | processed you can add InsertedDriverEntry to the mScheduledQueue.\r | |
950 | Then you can add any driver with an After dependency on InsertedDriverEntry\r | |
951 | by recursively calling this routine.\r | |
952 | \r | |
953 | @param InsertedDriverEntry The driver to insert on the ScheduledLink Queue\r | |
954 | \r | |
955 | **/\r | |
956 | VOID\r | |
957 | SmmInsertOnScheduledQueueWhileProcessingBeforeAndAfter (\r | |
958 | IN EFI_SMM_DRIVER_ENTRY *InsertedDriverEntry\r | |
959 | )\r | |
960 | {\r | |
961 | LIST_ENTRY *Link;\r | |
962 | EFI_SMM_DRIVER_ENTRY *DriverEntry;\r | |
963 | \r | |
964 | //\r | |
965 | // Process Before Dependency\r | |
966 | //\r | |
967 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
968 | DriverEntry = CR(Link, EFI_SMM_DRIVER_ENTRY, Link, EFI_SMM_DRIVER_ENTRY_SIGNATURE);\r | |
6a55eea3 | 969 | if (DriverEntry->Before && DriverEntry->Dependent && DriverEntry != InsertedDriverEntry) {\r |
970 | DEBUG ((DEBUG_DISPATCH, "Evaluate SMM DEPEX for FFS(%g)\n", &DriverEntry->FileName));\r | |
971 | DEBUG ((DEBUG_DISPATCH, " BEFORE FFS(%g) = ", &DriverEntry->BeforeAfterGuid));\r | |
e42e9404 | 972 | if (CompareGuid (&InsertedDriverEntry->FileName, &DriverEntry->BeforeAfterGuid)) {\r |
973 | //\r | |
974 | // Recursively process BEFORE\r | |
975 | //\r | |
6a55eea3 | 976 | DEBUG ((DEBUG_DISPATCH, "TRUE\n END\n RESULT = TRUE\n"));\r |
e42e9404 | 977 | SmmInsertOnScheduledQueueWhileProcessingBeforeAndAfter (DriverEntry);\r |
6a55eea3 | 978 | } else {\r |
979 | DEBUG ((DEBUG_DISPATCH, "FALSE\n END\n RESULT = FALSE\n"));\r | |
e42e9404 | 980 | }\r |
981 | }\r | |
982 | }\r | |
983 | \r | |
984 | //\r | |
985 | // Convert driver from Dependent to Scheduled state\r | |
986 | //\r | |
987 | \r | |
988 | InsertedDriverEntry->Dependent = FALSE;\r | |
989 | InsertedDriverEntry->Scheduled = TRUE;\r | |
990 | InsertTailList (&mScheduledQueue, &InsertedDriverEntry->ScheduledLink);\r | |
991 | \r | |
992 | \r | |
993 | //\r | |
994 | // Process After Dependency\r | |
995 | //\r | |
996 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
997 | DriverEntry = CR(Link, EFI_SMM_DRIVER_ENTRY, Link, EFI_SMM_DRIVER_ENTRY_SIGNATURE);\r | |
6a55eea3 | 998 | if (DriverEntry->After && DriverEntry->Dependent && DriverEntry != InsertedDriverEntry) {\r |
999 | DEBUG ((DEBUG_DISPATCH, "Evaluate SMM DEPEX for FFS(%g)\n", &DriverEntry->FileName));\r | |
1000 | DEBUG ((DEBUG_DISPATCH, " AFTER FFS(%g) = ", &DriverEntry->BeforeAfterGuid));\r | |
e42e9404 | 1001 | if (CompareGuid (&InsertedDriverEntry->FileName, &DriverEntry->BeforeAfterGuid)) {\r |
1002 | //\r | |
1003 | // Recursively process AFTER\r | |
1004 | //\r | |
6a55eea3 | 1005 | DEBUG ((DEBUG_DISPATCH, "TRUE\n END\n RESULT = TRUE\n"));\r |
e42e9404 | 1006 | SmmInsertOnScheduledQueueWhileProcessingBeforeAndAfter (DriverEntry);\r |
6a55eea3 | 1007 | } else {\r |
1008 | DEBUG ((DEBUG_DISPATCH, "FALSE\n END\n RESULT = FALSE\n"));\r | |
e42e9404 | 1009 | }\r |
1010 | }\r | |
1011 | }\r | |
1012 | }\r | |
1013 | \r | |
1014 | /**\r | |
1015 | Return TRUE if the Fv has been processed, FALSE if not.\r | |
1016 | \r | |
1017 | @param FvHandle The handle of a FV that's being tested\r | |
1018 | \r | |
1019 | @retval TRUE Fv protocol on FvHandle has been processed\r | |
1020 | @retval FALSE Fv protocol on FvHandle has not yet been\r | |
1021 | processed\r | |
1022 | \r | |
1023 | **/\r | |
1024 | BOOLEAN\r | |
1025 | FvHasBeenProcessed (\r | |
1026 | IN EFI_HANDLE FvHandle\r | |
1027 | )\r | |
1028 | {\r | |
1029 | LIST_ENTRY *Link;\r | |
1030 | KNOWN_HANDLE *KnownHandle;\r | |
1031 | \r | |
1032 | for (Link = mFvHandleList.ForwardLink; Link != &mFvHandleList; Link = Link->ForwardLink) {\r | |
1033 | KnownHandle = CR(Link, KNOWN_HANDLE, Link, KNOWN_HANDLE_SIGNATURE);\r | |
1034 | if (KnownHandle->Handle == FvHandle) {\r | |
1035 | return TRUE;\r | |
1036 | }\r | |
1037 | }\r | |
1038 | return FALSE;\r | |
1039 | }\r | |
1040 | \r | |
1041 | /**\r | |
1042 | Remember that Fv protocol on FvHandle has had it's drivers placed on the\r | |
1043 | mDiscoveredList. This fucntion adds entries on the mFvHandleList. Items are\r | |
1044 | never removed/freed from the mFvHandleList.\r | |
1045 | \r | |
1046 | @param FvHandle The handle of a FV that has been processed\r | |
1047 | \r | |
1048 | **/\r | |
1049 | VOID\r | |
1050 | FvIsBeingProcesssed (\r | |
1051 | IN EFI_HANDLE FvHandle\r | |
1052 | )\r | |
1053 | {\r | |
1054 | KNOWN_HANDLE *KnownHandle;\r | |
1055 | \r | |
1056 | KnownHandle = AllocatePool (sizeof (KNOWN_HANDLE));\r | |
1057 | ASSERT (KnownHandle != NULL);\r | |
1058 | \r | |
1059 | KnownHandle->Signature = KNOWN_HANDLE_SIGNATURE;\r | |
1060 | KnownHandle->Handle = FvHandle;\r | |
1061 | InsertTailList (&mFvHandleList, &KnownHandle->Link);\r | |
1062 | }\r | |
1063 | \r | |
1064 | /**\r | |
1065 | Convert FvHandle and DriverName into an EFI device path\r | |
1066 | \r | |
1067 | @param Fv Fv protocol, needed to read Depex info out of\r | |
1068 | FLASH.\r | |
1069 | @param FvHandle Handle for Fv, needed in the\r | |
1070 | EFI_SMM_DRIVER_ENTRY so that the PE image can be\r | |
1071 | read out of the FV at a later time.\r | |
1072 | @param DriverName Name of driver to add to mDiscoveredList.\r | |
1073 | \r | |
1074 | @return Pointer to device path constructed from FvHandle and DriverName\r | |
1075 | \r | |
1076 | **/\r | |
1077 | EFI_DEVICE_PATH_PROTOCOL *\r | |
1078 | SmmFvToDevicePath (\r | |
1079 | IN EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv,\r | |
1080 | IN EFI_HANDLE FvHandle,\r | |
1081 | IN EFI_GUID *DriverName\r | |
1082 | )\r | |
1083 | {\r | |
1084 | EFI_STATUS Status;\r | |
1085 | EFI_DEVICE_PATH_PROTOCOL *FvDevicePath;\r | |
1086 | EFI_DEVICE_PATH_PROTOCOL *FileNameDevicePath;\r | |
1087 | \r | |
1088 | //\r | |
1089 | // Remember the device path of the FV\r | |
1090 | //\r | |
1091 | Status = gBS->HandleProtocol (FvHandle, &gEfiDevicePathProtocolGuid, (VOID **)&FvDevicePath);\r | |
1092 | if (EFI_ERROR (Status)) {\r | |
1093 | FileNameDevicePath = NULL;\r | |
1094 | } else {\r | |
1095 | //\r | |
1096 | // Build a device path to the file in the FV to pass into gBS->LoadImage\r | |
1097 | //\r | |
1098 | EfiInitializeFwVolDevicepathNode (&mFvDevicePath.File, DriverName);\r | |
1099 | SetDevicePathEndNode (&mFvDevicePath.End);\r | |
1100 | \r | |
1101 | //\r | |
1102 | // Note: FileNameDevicePath is in DXE memory\r | |
1103 | //\r | |
1104 | FileNameDevicePath = AppendDevicePath (\r | |
1105 | FvDevicePath,\r | |
1106 | (EFI_DEVICE_PATH_PROTOCOL *)&mFvDevicePath\r | |
1107 | );\r | |
1108 | }\r | |
1109 | return FileNameDevicePath;\r | |
1110 | }\r | |
1111 | \r | |
1112 | /**\r | |
1113 | Add an entry to the mDiscoveredList. Allocate memory to store the DriverEntry,\r | |
1114 | and initilize any state variables. Read the Depex from the FV and store it\r | |
fa542a1e | 1115 | in DriverEntry. Pre-process the Depex to set the Before and After state.\r |
e42e9404 | 1116 | The Discovered list is never free'ed and contains booleans that represent the\r |
1117 | other possible SMM driver states.\r | |
1118 | \r | |
1119 | @param Fv Fv protocol, needed to read Depex info out of\r | |
1120 | FLASH.\r | |
1121 | @param FvHandle Handle for Fv, needed in the\r | |
1122 | EFI_SMM_DRIVER_ENTRY so that the PE image can be\r | |
1123 | read out of the FV at a later time.\r | |
1124 | @param DriverName Name of driver to add to mDiscoveredList.\r | |
1125 | \r | |
1126 | @retval EFI_SUCCESS If driver was added to the mDiscoveredList.\r | |
1127 | @retval EFI_ALREADY_STARTED The driver has already been started. Only one\r | |
1128 | DriverName may be active in the system at any one\r | |
1129 | time.\r | |
1130 | \r | |
1131 | **/\r | |
1132 | EFI_STATUS\r | |
1133 | SmmAddToDriverList (\r | |
1134 | IN EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv,\r | |
1135 | IN EFI_HANDLE FvHandle,\r | |
1136 | IN EFI_GUID *DriverName\r | |
1137 | )\r | |
1138 | {\r | |
1139 | EFI_SMM_DRIVER_ENTRY *DriverEntry;\r | |
1140 | \r | |
1141 | //\r | |
1142 | // Create the Driver Entry for the list. ZeroPool initializes lots of variables to\r | |
1143 | // NULL or FALSE.\r | |
1144 | //\r | |
1145 | DriverEntry = AllocateZeroPool (sizeof (EFI_SMM_DRIVER_ENTRY));\r | |
1146 | ASSERT (DriverEntry != NULL);\r | |
1147 | \r | |
1148 | DriverEntry->Signature = EFI_SMM_DRIVER_ENTRY_SIGNATURE;\r | |
1149 | CopyGuid (&DriverEntry->FileName, DriverName);\r | |
1150 | DriverEntry->FvHandle = FvHandle;\r | |
1151 | DriverEntry->Fv = Fv;\r | |
1152 | DriverEntry->FvFileDevicePath = SmmFvToDevicePath (Fv, FvHandle, DriverName);\r | |
1153 | \r | |
1154 | SmmGetDepexSectionAndPreProccess (DriverEntry);\r | |
1155 | \r | |
1156 | InsertTailList (&mDiscoveredList, &DriverEntry->Link);\r | |
1157 | gRequestDispatch = TRUE;\r | |
1158 | \r | |
1159 | return EFI_SUCCESS;\r | |
1160 | }\r | |
1161 | \r | |
1162 | /**\r | |
1163 | This function is the main entry point for an SMM handler dispatch\r | |
1164 | or communicate-based callback.\r | |
1165 | \r | |
1166 | Event notification that is fired every time a FV dispatch protocol is added.\r | |
1167 | More than one protocol may have been added when this event is fired, so you\r | |
1168 | must loop on SmmLocateHandle () to see how many protocols were added and\r | |
1169 | do the following to each FV:\r | |
1170 | If the Fv has already been processed, skip it. If the Fv has not been\r | |
1171 | processed then mark it as being processed, as we are about to process it.\r | |
1172 | Read the Fv and add any driver in the Fv to the mDiscoveredList.The\r | |
1173 | mDiscoveredList is never free'ed and contains variables that define\r | |
1174 | the other states the SMM driver transitions to..\r | |
1175 | While you are at it read the A Priori file into memory.\r | |
1176 | Place drivers in the A Priori list onto the mScheduledQueue.\r | |
1177 | \r | |
1178 | @param DispatchHandle The unique handle assigned to this handler by SmiHandlerRegister().\r | |
1179 | @param Context Points to an optional handler context which was specified when the handler was registered.\r | |
1180 | @param CommBuffer A pointer to a collection of data in memory that will\r | |
1181 | be conveyed from a non-SMM environment into an SMM environment.\r | |
1182 | @param CommBufferSize The size of the CommBuffer.\r | |
1183 | \r | |
1184 | @return Status Code\r | |
1185 | \r | |
1186 | **/\r | |
1187 | EFI_STATUS\r | |
1188 | EFIAPI\r | |
1189 | SmmDriverDispatchHandler (\r | |
1190 | IN EFI_HANDLE DispatchHandle,\r | |
1191 | IN CONST VOID *Context, OPTIONAL\r | |
1192 | IN OUT VOID *CommBuffer, OPTIONAL\r | |
1193 | IN OUT UINTN *CommBufferSize OPTIONAL\r | |
1194 | )\r | |
1195 | {\r | |
1196 | EFI_STATUS Status;\r | |
1197 | UINTN HandleCount;\r | |
1198 | EFI_HANDLE *HandleBuffer;\r | |
1199 | EFI_STATUS GetNextFileStatus;\r | |
1200 | EFI_STATUS SecurityStatus;\r | |
1201 | EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv;\r | |
1202 | EFI_DEVICE_PATH_PROTOCOL *FvDevicePath;\r | |
1203 | EFI_HANDLE FvHandle;\r | |
1204 | EFI_GUID NameGuid;\r | |
1205 | UINTN Key;\r | |
1206 | EFI_FV_FILETYPE Type;\r | |
1207 | EFI_FV_FILE_ATTRIBUTES Attributes;\r | |
1208 | UINTN Size;\r | |
1209 | EFI_SMM_DRIVER_ENTRY *DriverEntry;\r | |
1210 | EFI_GUID *AprioriFile;\r | |
1211 | UINTN AprioriEntryCount;\r | |
1212 | UINTN Index;\r | |
1213 | LIST_ENTRY *Link;\r | |
1214 | UINT32 AuthenticationStatus;\r | |
1215 | UINTN SizeOfBuffer;\r | |
1216 | \r | |
1217 | HandleBuffer = NULL;\r | |
1218 | Status = gBS->LocateHandleBuffer (\r | |
1219 | ByProtocol,\r | |
1220 | &gEfiFirmwareVolume2ProtocolGuid,\r | |
1221 | NULL,\r | |
1222 | &HandleCount,\r | |
1223 | &HandleBuffer\r | |
1224 | );\r | |
1225 | if (EFI_ERROR (Status)) {\r | |
1226 | return EFI_NOT_FOUND;\r | |
1227 | }\r | |
1228 | \r | |
1229 | for (Index = 0; Index < HandleCount; Index++) {\r | |
1230 | FvHandle = HandleBuffer[Index];\r | |
1231 | \r | |
1232 | if (FvHasBeenProcessed (FvHandle)) {\r | |
1233 | //\r | |
1234 | // This Fv has already been processed so lets skip it!\r | |
1235 | //\r | |
1236 | continue;\r | |
1237 | }\r | |
1238 | \r | |
1239 | //\r | |
1240 | // Since we are about to process this Fv mark it as processed.\r | |
1241 | //\r | |
1242 | FvIsBeingProcesssed (FvHandle);\r | |
1243 | \r | |
1244 | Status = gBS->HandleProtocol (FvHandle, &gEfiFirmwareVolume2ProtocolGuid, (VOID **)&Fv);\r | |
1245 | if (EFI_ERROR (Status)) {\r | |
1246 | //\r | |
1247 | // FvHandle must have a Firmware Volume2 Protocol thus we should never get here.\r | |
1248 | //\r | |
1249 | ASSERT (FALSE);\r | |
1250 | continue;\r | |
1251 | }\r | |
1252 | \r | |
1253 | Status = gBS->HandleProtocol (FvHandle, &gEfiDevicePathProtocolGuid, (VOID **)&FvDevicePath);\r | |
1254 | if (EFI_ERROR (Status)) {\r | |
1255 | //\r | |
1256 | // The Firmware volume doesn't have device path, can't be dispatched.\r | |
1257 | //\r | |
1258 | continue;\r | |
1259 | }\r | |
1260 | \r | |
1261 | //\r | |
1262 | // If the Security Architectural Protocol has not been located yet, then attempt to locate it\r | |
1263 | //\r | |
1264 | if (mSecurity == NULL) {\r | |
1265 | gBS->LocateProtocol (&gEfiSecurityArchProtocolGuid, NULL, (VOID**)&mSecurity);\r | |
1266 | }\r | |
1267 | \r | |
1268 | //\r | |
1269 | // Evaluate the authentication status of the Firmware Volume through\r | |
1270 | // Security Architectural Protocol\r | |
1271 | //\r | |
1272 | if (mSecurity != NULL) {\r | |
1273 | SecurityStatus = mSecurity->FileAuthenticationState (\r | |
1274 | mSecurity,\r | |
1275 | 0,\r | |
1276 | FvDevicePath\r | |
1277 | );\r | |
1278 | if (SecurityStatus != EFI_SUCCESS) {\r | |
1279 | //\r | |
1280 | // Security check failed. The firmware volume should not be used for any purpose.\r | |
1281 | //\r | |
1282 | continue;\r | |
1283 | }\r | |
1284 | }\r | |
1285 | \r | |
1286 | //\r | |
1287 | // Discover Drivers in FV and add them to the Discovered Driver List.\r | |
1288 | // Process EFI_FV_FILETYPE_SMM type and then EFI_FV_FILETYPE_COMBINED_SMM_DXE\r | |
1289 | //\r | |
1290 | for (Index = 0; Index < sizeof (mSmmFileTypes)/sizeof (EFI_FV_FILETYPE); Index++) {\r | |
1291 | //\r | |
1292 | // Initialize the search key\r | |
1293 | //\r | |
1294 | Key = 0;\r | |
1295 | do {\r | |
1296 | Type = mSmmFileTypes[Index];\r | |
1297 | GetNextFileStatus = Fv->GetNextFile (\r | |
1298 | Fv,\r | |
1299 | &Key,\r | |
1300 | &Type,\r | |
1301 | &NameGuid,\r | |
1302 | &Attributes,\r | |
1303 | &Size\r | |
1304 | );\r | |
1305 | if (!EFI_ERROR (GetNextFileStatus)) {\r | |
1306 | SmmAddToDriverList (Fv, FvHandle, &NameGuid);\r | |
1307 | }\r | |
1308 | } while (!EFI_ERROR (GetNextFileStatus));\r | |
1309 | }\r | |
1310 | \r | |
1311 | //\r | |
1312 | // Read the array of GUIDs from the Apriori file if it is present in the firmware volume\r | |
1313 | // (Note: AprioriFile is in DXE memory)\r | |
1314 | //\r | |
1315 | AprioriFile = NULL;\r | |
1316 | Status = Fv->ReadSection (\r | |
1317 | Fv,\r | |
1318 | &gAprioriGuid,\r | |
1319 | EFI_SECTION_RAW,\r | |
1320 | 0,\r | |
1321 | (VOID **)&AprioriFile,\r | |
1322 | &SizeOfBuffer,\r | |
1323 | &AuthenticationStatus\r | |
1324 | );\r | |
1325 | if (!EFI_ERROR (Status)) {\r | |
1326 | AprioriEntryCount = SizeOfBuffer / sizeof (EFI_GUID);\r | |
1327 | } else {\r | |
1328 | AprioriEntryCount = 0;\r | |
1329 | }\r | |
1330 | \r | |
1331 | //\r | |
1332 | // Put drivers on Apriori List on the Scheduled queue. The Discovered List includes\r | |
1333 | // drivers not in the current FV and these must be skipped since the a priori list\r | |
1334 | // is only valid for the FV that it resided in.\r | |
1335 | //\r | |
1336 | \r | |
1337 | for (Index = 0; Index < AprioriEntryCount; Index++) {\r | |
1338 | for (Link = mDiscoveredList.ForwardLink; Link != &mDiscoveredList; Link = Link->ForwardLink) {\r | |
1339 | DriverEntry = CR(Link, EFI_SMM_DRIVER_ENTRY, Link, EFI_SMM_DRIVER_ENTRY_SIGNATURE);\r | |
1340 | if (CompareGuid (&DriverEntry->FileName, &AprioriFile[Index]) &&\r | |
1341 | (FvHandle == DriverEntry->FvHandle)) {\r | |
1342 | DriverEntry->Dependent = FALSE;\r | |
1343 | DriverEntry->Scheduled = TRUE;\r | |
1344 | InsertTailList (&mScheduledQueue, &DriverEntry->ScheduledLink);\r | |
6a55eea3 | 1345 | DEBUG ((DEBUG_DISPATCH, "Evaluate SMM DEPEX for FFS(%g)\n", &DriverEntry->FileName));\r |
1346 | DEBUG ((DEBUG_DISPATCH, " RESULT = TRUE (Apriori)\n"));\r | |
e42e9404 | 1347 | break;\r |
1348 | }\r | |
1349 | }\r | |
1350 | }\r | |
1351 | \r | |
1352 | //\r | |
1353 | // Free data allocated by Fv->ReadSection ()\r | |
1354 | //\r | |
1355 | // The UEFI Boot Services FreePool() function must be used because Fv->ReadSection \r | |
1356 | // used the UEFI Boot Services AllocatePool() function\r | |
1357 | //\r | |
1358 | gBS->FreePool (AprioriFile);\r | |
1359 | }\r | |
1360 | \r | |
1361 | //\r | |
1362 | // Execute the SMM Dispatcher on any newly discovered FVs and previously \r | |
1363 | // discovered SMM drivers that have been discovered but not dispatched.\r | |
1364 | //\r | |
5657b268 | 1365 | Status = SmmDispatcher ();\r |
1366 | \r | |
1367 | //\r | |
1368 | // Check to see if CommBuffer and CommBufferSize are valid\r | |
1369 | //\r | |
1370 | if (CommBuffer != NULL && CommBufferSize != NULL) {\r | |
1371 | if (*CommBufferSize > 0) {\r | |
1372 | if (Status == EFI_NOT_READY) {\r | |
1373 | //\r | |
1374 | // If a the SMM Core Entry Point was just registered, then set flag to \r | |
1375 | // request the SMM Dispatcher to be restarted.\r | |
1376 | //\r | |
1377 | *(UINT8 *)CommBuffer = COMM_BUFFER_SMM_DISPATCH_RESTART;\r | |
1378 | } else if (!EFI_ERROR (Status)) {\r | |
1379 | //\r | |
1380 | // Set the flag to show that the SMM Dispatcher executed without errors\r | |
1381 | //\r | |
1382 | *(UINT8 *)CommBuffer = COMM_BUFFER_SMM_DISPATCH_SUCCESS;\r | |
1383 | } else {\r | |
1384 | //\r | |
1385 | // Set the flag to show that the SMM Dispatcher encountered an error\r | |
1386 | //\r | |
1387 | *(UINT8 *)CommBuffer = COMM_BUFFER_SMM_DISPATCH_ERROR;\r | |
1388 | }\r | |
1389 | }\r | |
1390 | }\r | |
1391 | \r | |
1392 | return EFI_SUCCESS;\r | |
e42e9404 | 1393 | }\r |
1394 | \r | |
1395 | /**\r | |
1396 | Traverse the discovered list for any drivers that were discovered but not loaded\r | |
1397 | because the dependency experessions evaluated to false.\r | |
1398 | \r | |
1399 | **/\r | |
1400 | VOID\r | |
1401 | SmmDisplayDiscoveredNotDispatched (\r | |
1402 | VOID\r | |
1403 | )\r | |
1404 | {\r | |
1405 | LIST_ENTRY *Link;\r | |
1406 | EFI_SMM_DRIVER_ENTRY *DriverEntry;\r | |
1407 | \r | |
1408 | for (Link = mDiscoveredList.ForwardLink;Link !=&mDiscoveredList; Link = Link->ForwardLink) {\r | |
1409 | DriverEntry = CR(Link, EFI_SMM_DRIVER_ENTRY, Link, EFI_SMM_DRIVER_ENTRY_SIGNATURE);\r | |
1410 | if (DriverEntry->Dependent) {\r | |
1411 | DEBUG ((DEBUG_LOAD, "SMM Driver %g was discovered but not loaded!!\n", &DriverEntry->FileName));\r | |
1412 | }\r | |
1413 | }\r | |
1414 | }\r |