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162ed594 | 1 | /** @file\r |
28a00297 | 2 | Firmware File System driver that produce Firmware Volume protocol.\r |
022c6d45 | 3 | Layers on top of Firmware Block protocol to produce a file abstraction\r |
28a00297 | 4 | of FV based files.\r |
23c98c94 | 5 | \r |
6 | Copyright (c) 2006 - 2008, Intel Corporation. <BR>\r | |
7 | All rights reserved. This program and the accompanying materials\r | |
8 | are licensed and made available under the terms and conditions of the BSD License\r | |
9 | which accompanies this distribution. The full text of the license may be found at\r | |
10 | http://opensource.org/licenses/bsd-license.php\r | |
11 | \r | |
12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
13 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
28a00297 | 14 | \r |
15 | **/\r | |
16 | \r | |
9c4ac31c | 17 | #include "DxeMain.h"\r |
ec90508b | 18 | #include "FwVolDriver.h"\r |
28a00297 | 19 | \r |
28a00297 | 20 | \r |
21 | //\r | |
22 | // Protocol notify related globals\r | |
23 | //\r | |
24 | VOID *gEfiFwVolBlockNotifyReg;\r | |
25 | EFI_EVENT gEfiFwVolBlockEvent;\r | |
26 | \r | |
27 | FV_DEVICE mFvDevice = {\r | |
0c2b5da8 | 28 | FV2_DEVICE_SIGNATURE,\r |
28a00297 | 29 | NULL,\r |
30 | NULL,\r | |
31 | {\r | |
32 | FvGetVolumeAttributes,\r | |
33 | FvSetVolumeAttributes,\r | |
34 | FvReadFile,\r | |
35 | FvReadFileSection,\r | |
36 | FvWriteFile,\r | |
ec90508b | 37 | FvGetNextFile, \r |
38 | sizeof (UINTN),\r | |
0c2b5da8 | 39 | NULL,\r |
40 | FvGetVolumeInfo,\r | |
41 | FvSetVolumeInfo\r | |
28a00297 | 42 | },\r |
43 | NULL,\r | |
44 | NULL,\r | |
45 | NULL,\r | |
46 | NULL,\r | |
47 | { NULL, NULL },\r | |
48 | 0\r | |
49 | };\r | |
50 | \r | |
51 | \r | |
52 | //\r | |
53 | // FFS helper functions\r | |
54 | //\r | |
162ed594 | 55 | /**\r |
657abcff LG |
56 | Read data from Firmware Block by FVB protocol Read. \r |
57 | The data may cross the multi block ranges.\r | |
58 | \r | |
59 | @param Fvb The FW_VOL_BLOCK_PROTOCOL instance from which to read data.\r | |
60 | @param StartLba Pointer to StartLba.\r | |
61 | On input, the start logical block index from which to read.\r | |
62 | On output,the end logical block index after reading.\r | |
63 | @param Offset Pointer to Offset\r | |
64 | On input, offset into the block at which to begin reading.\r | |
65 | On output, offset into the end block after reading.\r | |
66 | @param DataSize Size of data to be read.\r | |
67 | @param Data Pointer to Buffer that the data will be read into.\r | |
68 | \r | |
69 | @retval EFI_SUCCESS Successfully read data from firmware block.\r | |
70 | @retval others\r | |
71 | **/\r | |
72 | EFI_STATUS\r | |
73 | ReadFvbData (\r | |
74 | IN EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb,\r | |
75 | IN OUT EFI_LBA *StartLba,\r | |
76 | IN OUT UINTN *Offset,\r | |
77 | IN UINTN DataSize,\r | |
78 | OUT UINT8 *Data\r | |
79 | )\r | |
80 | {\r | |
81 | UINTN BlockSize;\r | |
82 | UINTN NumberOfBlocks;\r | |
83 | UINTN BlockIndex;\r | |
84 | UINTN ReadDataSize;\r | |
85 | EFI_STATUS Status;\r | |
86 | \r | |
87 | //\r | |
88 | // Try read data in current block\r | |
89 | //\r | |
90 | BlockIndex = 0;\r | |
91 | ReadDataSize = DataSize;\r | |
92 | Status = Fvb->Read (Fvb, *StartLba, *Offset, &ReadDataSize, Data);\r | |
93 | if (Status == EFI_SUCCESS) {\r | |
94 | *Offset += DataSize;\r | |
95 | return EFI_SUCCESS;\r | |
96 | } else if (Status != EFI_BAD_BUFFER_SIZE) {\r | |
97 | //\r | |
98 | // other error will direct return\r | |
99 | //\r | |
100 | return Status;\r | |
101 | }\r | |
102 | \r | |
103 | //\r | |
104 | // Data crosses the blocks, read data from next block\r | |
105 | //\r | |
106 | DataSize -= ReadDataSize;\r | |
107 | Data += ReadDataSize;\r | |
108 | *StartLba = *StartLba + 1;\r | |
109 | while (DataSize > 0) {\r | |
110 | Status = Fvb->GetBlockSize (Fvb, *StartLba, &BlockSize, &NumberOfBlocks);\r | |
111 | if (EFI_ERROR (Status)) {\r | |
112 | return Status;\r | |
113 | }\r | |
114 | \r | |
115 | //\r | |
116 | // Read data from the crossing blocks\r | |
117 | //\r | |
118 | BlockIndex = 0; \r | |
119 | while (BlockIndex < NumberOfBlocks && DataSize >= BlockSize) {\r | |
120 | Status = Fvb->Read (Fvb, *StartLba + BlockIndex, 0, &BlockSize, Data);\r | |
121 | if (EFI_ERROR (Status)) {\r | |
122 | return Status;\r | |
123 | }\r | |
124 | Data += BlockSize;\r | |
125 | DataSize -= BlockSize;\r | |
126 | BlockIndex ++;\r | |
127 | }\r | |
128 | \r | |
129 | //\r | |
130 | // Data doesn't exceed the current block range.\r | |
131 | //\r | |
132 | if (DataSize < BlockSize) {\r | |
133 | break;\r | |
134 | }\r | |
135 | \r | |
136 | //\r | |
137 | // Data must be got from the next block range.\r | |
138 | //\r | |
139 | *StartLba += NumberOfBlocks;\r | |
140 | }\r | |
141 | \r | |
142 | //\r | |
143 | // read the remaining data\r | |
144 | //\r | |
145 | if (DataSize > 0) {\r | |
146 | Status = Fvb->Read (Fvb, *StartLba + BlockIndex, 0, &DataSize, Data);\r | |
147 | if (EFI_ERROR (Status)) {\r | |
148 | return Status;\r | |
149 | }\r | |
150 | }\r | |
151 | \r | |
152 | //\r | |
153 | // Update Lba and Offset used by the following read.\r | |
154 | //\r | |
155 | *StartLba += BlockIndex;\r | |
156 | *Offset = DataSize;\r | |
157 | \r | |
158 | return EFI_SUCCESS;\r | |
159 | }\r | |
160 | \r | |
161 | /**\r | |
162 | Given the supplied FW_VOL_BLOCK_PROTOCOL, allocate a buffer for output and\r | |
163 | copy the real length volume header into it.\r | |
28a00297 | 164 | \r |
022c6d45 | 165 | @param Fvb The FW_VOL_BLOCK_PROTOCOL instance from which to\r |
166 | read the volume header\r | |
167 | @param FwVolHeader Pointer to pointer to allocated buffer in which\r | |
168 | the volume header is returned.\r | |
28a00297 | 169 | \r |
022c6d45 | 170 | @retval EFI_OUT_OF_RESOURCES No enough buffer could be allocated.\r |
171 | @retval EFI_SUCCESS Successfully read volume header to the allocated\r | |
162ed594 | 172 | buffer.\r |
28a00297 | 173 | \r |
162ed594 | 174 | **/\r |
175 | EFI_STATUS\r | |
176 | GetFwVolHeader (\r | |
177 | IN EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb,\r | |
178 | OUT EFI_FIRMWARE_VOLUME_HEADER **FwVolHeader\r | |
179 | )\r | |
28a00297 | 180 | {\r |
181 | EFI_STATUS Status;\r | |
182 | EFI_FIRMWARE_VOLUME_HEADER TempFvh;\r | |
183 | UINTN FvhLength;\r | |
657abcff LG |
184 | EFI_LBA StartLba;\r |
185 | UINTN Offset;\r | |
28a00297 | 186 | UINT8 *Buffer;\r |
657abcff | 187 | \r |
28a00297 | 188 | //\r |
657abcff | 189 | // Read the standard FV header\r |
28a00297 | 190 | //\r |
657abcff LG |
191 | StartLba = 0;\r |
192 | Offset = 0;\r | |
28a00297 | 193 | FvhLength = sizeof (EFI_FIRMWARE_VOLUME_HEADER);\r |
657abcff | 194 | Status = ReadFvbData (Fvb, &StartLba, &Offset, FvhLength, (UINT8 *)&TempFvh);\r |
13492369 | 195 | if (EFI_ERROR (Status)) {\r |
196 | return Status;\r | |
197 | }\r | |
28a00297 | 198 | \r |
199 | //\r | |
200 | // Allocate a buffer for the caller\r | |
201 | //\r | |
9c4ac31c | 202 | *FwVolHeader = AllocatePool (TempFvh.HeaderLength);\r |
28a00297 | 203 | if (*FwVolHeader == NULL) {\r |
204 | return EFI_OUT_OF_RESOURCES;\r | |
205 | }\r | |
206 | \r | |
207 | //\r | |
208 | // Copy the standard header into the buffer\r | |
209 | //\r | |
210 | CopyMem (*FwVolHeader, &TempFvh, sizeof (EFI_FIRMWARE_VOLUME_HEADER));\r | |
211 | \r | |
212 | //\r | |
213 | // Read the rest of the header\r | |
214 | //\r | |
215 | FvhLength = TempFvh.HeaderLength - sizeof (EFI_FIRMWARE_VOLUME_HEADER);\r | |
216 | Buffer = (UINT8 *)*FwVolHeader + sizeof (EFI_FIRMWARE_VOLUME_HEADER);\r | |
657abcff | 217 | Status = ReadFvbData (Fvb, &StartLba, &Offset, FvhLength, Buffer);\r |
28a00297 | 218 | if (EFI_ERROR (Status)) {\r |
219 | //\r | |
220 | // Read failed so free buffer\r | |
221 | //\r | |
222 | CoreFreePool (*FwVolHeader);\r | |
223 | }\r | |
022c6d45 | 224 | \r |
28a00297 | 225 | return Status;\r |
226 | }\r | |
227 | \r | |
228 | \r | |
28a00297 | 229 | \r |
162ed594 | 230 | /**\r |
28a00297 | 231 | Free FvDevice resource when error happens\r |
232 | \r | |
022c6d45 | 233 | @param FvDevice pointer to the FvDevice to be freed.\r |
28a00297 | 234 | \r |
162ed594 | 235 | **/\r |
162ed594 | 236 | VOID\r |
237 | FreeFvDeviceResource (\r | |
238 | IN FV_DEVICE *FvDevice\r | |
239 | )\r | |
28a00297 | 240 | {\r |
241 | FFS_FILE_LIST_ENTRY *FfsFileEntry;\r | |
242 | LIST_ENTRY *NextEntry;\r | |
243 | \r | |
244 | //\r | |
245 | // Free File List Entry\r | |
246 | //\r | |
247 | FfsFileEntry = (FFS_FILE_LIST_ENTRY *)FvDevice->FfsFileListHeader.ForwardLink;\r | |
248 | while (&FfsFileEntry->Link != &FvDevice->FfsFileListHeader) {\r | |
249 | NextEntry = (&FfsFileEntry->Link)->ForwardLink;\r | |
022c6d45 | 250 | \r |
28a00297 | 251 | if (FfsFileEntry->StreamHandle != 0) {\r |
252 | //\r | |
253 | // Close stream and free resources from SEP\r | |
254 | //\r | |
797a9d67 | 255 | CloseSectionStream (FfsFileEntry->StreamHandle);\r |
28a00297 | 256 | }\r |
257 | \r | |
258 | CoreFreePool (FfsFileEntry);\r | |
259 | \r | |
e94a9ff7 | 260 | FfsFileEntry = (FFS_FILE_LIST_ENTRY *) NextEntry;\r |
28a00297 | 261 | }\r |
262 | \r | |
263 | \r | |
264 | //\r | |
265 | // Free the cache\r | |
266 | //\r | |
267 | CoreFreePool (FvDevice->CachedFv);\r | |
268 | \r | |
269 | //\r | |
270 | // Free Volume Header\r | |
271 | //\r | |
272 | CoreFreePool (FvDevice->FwVolHeader);\r | |
273 | \r | |
274 | return;\r | |
275 | }\r | |
276 | \r | |
277 | \r | |
28a00297 | 278 | \r |
162ed594 | 279 | /**\r |
e94a9ff7 | 280 | Check if an FV is consistent and allocate cache for it.\r |
28a00297 | 281 | \r |
022c6d45 | 282 | @param FvDevice A pointer to the FvDevice to be checked.\r |
28a00297 | 283 | \r |
022c6d45 | 284 | @retval EFI_OUT_OF_RESOURCES No enough buffer could be allocated.\r |
285 | @retval EFI_SUCCESS FV is consistent and cache is allocated.\r | |
162ed594 | 286 | @retval EFI_VOLUME_CORRUPTED File system is corrupted.\r |
28a00297 | 287 | \r |
162ed594 | 288 | **/\r |
289 | EFI_STATUS\r | |
290 | FvCheck (\r | |
291 | IN OUT FV_DEVICE *FvDevice\r | |
292 | )\r | |
28a00297 | 293 | {\r |
294 | EFI_STATUS Status;\r | |
295 | EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb;\r | |
296 | EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;\r | |
8ee3a199 | 297 | EFI_FVB_ATTRIBUTES_2 FvbAttributes;\r |
28a00297 | 298 | EFI_FV_BLOCK_MAP_ENTRY *BlockMap;\r |
299 | FFS_FILE_LIST_ENTRY *FfsFileEntry;\r | |
300 | EFI_FFS_FILE_HEADER *FfsHeader;\r | |
301 | UINT8 *CacheLocation;\r | |
302 | UINTN LbaOffset;\r | |
657abcff | 303 | UINTN HeaderSize;\r |
28a00297 | 304 | UINTN Index;\r |
305 | EFI_LBA LbaIndex;\r | |
306 | UINTN Size;\r | |
307 | UINTN FileLength;\r | |
308 | EFI_FFS_FILE_STATE FileState;\r | |
309 | UINT8 *TopFvAddress;\r | |
310 | UINTN TestLength;\r | |
311 | \r | |
312 | \r | |
313 | Fvb = FvDevice->Fvb;\r | |
314 | FwVolHeader = FvDevice->FwVolHeader;\r | |
022c6d45 | 315 | \r |
28a00297 | 316 | Status = Fvb->GetAttributes (Fvb, &FvbAttributes);\r |
317 | if (EFI_ERROR (Status)) {\r | |
318 | return Status;\r | |
319 | }\r | |
320 | \r | |
321 | //\r | |
322 | // Size is the size of the FV minus the head. We have already allocated\r | |
323 | // the header to check to make sure the volume is valid\r | |
324 | //\r | |
325 | Size = (UINTN)(FwVolHeader->FvLength - FwVolHeader->HeaderLength);\r | |
9c4ac31c | 326 | FvDevice->CachedFv = AllocatePool (Size);\r |
28a00297 | 327 | \r |
328 | if (FvDevice->CachedFv == NULL) {\r | |
329 | return EFI_OUT_OF_RESOURCES;\r | |
330 | }\r | |
331 | \r | |
332 | //\r | |
333 | // Remember a pointer to the end fo the CachedFv\r | |
334 | //\r | |
335 | FvDevice->EndOfCachedFv = FvDevice->CachedFv + Size;\r | |
336 | \r | |
337 | //\r | |
338 | // Copy FV minus header into memory using the block map we have all ready\r | |
339 | // read into memory.\r | |
340 | //\r | |
341 | BlockMap = FwVolHeader->BlockMap;\r | |
342 | CacheLocation = FvDevice->CachedFv;\r | |
343 | LbaIndex = 0;\r | |
657abcff LG |
344 | LbaOffset = 0;\r |
345 | HeaderSize = FwVolHeader->HeaderLength;\r | |
28a00297 | 346 | while ((BlockMap->NumBlocks != 0) || (BlockMap->Length != 0)) {\r |
657abcff LG |
347 | Index = 0;\r |
348 | Size = BlockMap->Length;\r | |
349 | if (HeaderSize > 0) {\r | |
350 | //\r | |
351 | // Skip header size\r | |
352 | //\r | |
353 | for (; Index < BlockMap->NumBlocks && HeaderSize >= BlockMap->Length; Index ++) {\r | |
354 | HeaderSize -= BlockMap->Length;\r | |
355 | LbaIndex ++;\r | |
356 | }\r | |
022c6d45 | 357 | \r |
657abcff LG |
358 | //\r |
359 | // Check whether FvHeader is crossing the multi block range.\r | |
360 | //\r | |
361 | if (HeaderSize > BlockMap->Length) {\r | |
362 | BlockMap++;\r | |
363 | continue;\r | |
364 | } else if (HeaderSize > 0) {\r | |
365 | LbaOffset = HeaderSize;\r | |
366 | Size = BlockMap->Length - HeaderSize;\r | |
367 | HeaderSize = 0;\r | |
28a00297 | 368 | }\r |
657abcff LG |
369 | }\r |
370 | \r | |
371 | //\r | |
372 | // read the FV data \r | |
373 | //\r | |
374 | for (; Index < BlockMap->NumBlocks; Index ++) {\r | |
28a00297 | 375 | Status = Fvb->Read (Fvb,\r |
e94a9ff7 | 376 | LbaIndex,\r |
377 | LbaOffset,\r | |
378 | &Size,\r | |
379 | CacheLocation\r | |
380 | );\r | |
657abcff | 381 | \r |
28a00297 | 382 | //\r |
383 | // Not check EFI_BAD_BUFFER_SIZE, for Size = BlockMap->Length\r | |
384 | //\r | |
385 | if (EFI_ERROR (Status)) {\r | |
386 | goto Done;\r | |
387 | }\r | |
022c6d45 | 388 | \r |
657abcff LG |
389 | LbaIndex++;\r |
390 | CacheLocation += Size;\r | |
391 | \r | |
28a00297 | 392 | //\r |
393 | // After we skip Fv Header always read from start of block\r | |
394 | //\r | |
395 | LbaOffset = 0;\r | |
657abcff | 396 | Size = BlockMap->Length;\r |
28a00297 | 397 | }\r |
657abcff | 398 | \r |
28a00297 | 399 | BlockMap++;\r |
400 | }\r | |
401 | \r | |
402 | //\r | |
403 | // Scan to check the free space & File list\r | |
404 | //\r | |
71f68914 | 405 | if ((FvbAttributes & EFI_FVB2_ERASE_POLARITY) != 0) {\r |
28a00297 | 406 | FvDevice->ErasePolarity = 1;\r |
407 | } else {\r | |
408 | FvDevice->ErasePolarity = 0;\r | |
022c6d45 | 409 | }\r |
28a00297 | 410 | \r |
411 | \r | |
412 | //\r | |
413 | // go through the whole FV cache, check the consistence of the FV.\r | |
414 | // Make a linked list off all the Ffs file headers\r | |
415 | //\r | |
416 | Status = EFI_SUCCESS;\r | |
417 | InitializeListHead (&FvDevice->FfsFileListHeader);\r | |
418 | \r | |
419 | //\r | |
420 | // Build FFS list\r | |
421 | //\r | |
e94a9ff7 | 422 | FfsHeader = (EFI_FFS_FILE_HEADER *) FvDevice->CachedFv;\r |
28a00297 | 423 | TopFvAddress = FvDevice->EndOfCachedFv;\r |
e94a9ff7 | 424 | while ((UINT8 *) FfsHeader < TopFvAddress) {\r |
28a00297 | 425 | \r |
e94a9ff7 | 426 | TestLength = TopFvAddress - ((UINT8 *) FfsHeader);\r |
28a00297 | 427 | if (TestLength > sizeof (EFI_FFS_FILE_HEADER)) {\r |
428 | TestLength = sizeof (EFI_FFS_FILE_HEADER);\r | |
429 | }\r | |
430 | \r | |
431 | if (IsBufferErased (FvDevice->ErasePolarity, FfsHeader, TestLength)) {\r | |
432 | //\r | |
433 | // We have found the free space so we are done!\r | |
434 | //\r | |
435 | goto Done;\r | |
436 | }\r | |
437 | \r | |
438 | if (!IsValidFfsHeader (FvDevice->ErasePolarity, FfsHeader, &FileState)) {\r | |
022c6d45 | 439 | if ((FileState == EFI_FILE_HEADER_INVALID) ||\r |
28a00297 | 440 | (FileState == EFI_FILE_HEADER_CONSTRUCTION)) {\r |
441 | FfsHeader++;\r | |
28a00297 | 442 | continue;\r |
28a00297 | 443 | } else {\r |
444 | //\r | |
445 | // File system is corrputed\r | |
446 | //\r | |
447 | Status = EFI_VOLUME_CORRUPTED;\r | |
448 | goto Done;\r | |
449 | }\r | |
450 | }\r | |
451 | \r | |
452 | if (!IsValidFfsFile (FvDevice->ErasePolarity, FfsHeader)) {\r | |
453 | //\r | |
454 | // File system is corrupted\r | |
455 | //\r | |
456 | Status = EFI_VOLUME_CORRUPTED;\r | |
457 | goto Done;\r | |
458 | }\r | |
459 | \r | |
460 | //\r | |
461 | // Size[3] is a three byte array, read 4 bytes and throw one away\r | |
462 | //\r | |
463 | FileLength = *(UINT32 *)&FfsHeader->Size[0] & 0x00FFFFFF;\r | |
464 | \r | |
465 | FileState = GetFileState (FvDevice->ErasePolarity, FfsHeader);\r | |
022c6d45 | 466 | \r |
28a00297 | 467 | //\r |
468 | // check for non-deleted file\r | |
469 | //\r | |
470 | if (FileState != EFI_FILE_DELETED) {\r | |
471 | //\r | |
472 | // Create a FFS list entry for each non-deleted file\r | |
473 | //\r | |
9c4ac31c | 474 | FfsFileEntry = AllocateZeroPool (sizeof (FFS_FILE_LIST_ENTRY));\r |
28a00297 | 475 | if (FfsFileEntry == NULL) {\r |
476 | Status = EFI_OUT_OF_RESOURCES;\r | |
477 | goto Done;\r | |
478 | }\r | |
022c6d45 | 479 | \r |
28a00297 | 480 | FfsFileEntry->FfsHeader = FfsHeader;\r |
481 | InsertTailList (&FvDevice->FfsFileListHeader, &FfsFileEntry->Link);\r | |
482 | }\r | |
483 | \r | |
484 | FfsHeader = (EFI_FFS_FILE_HEADER *)(((UINT8 *)FfsHeader) + FileLength);\r | |
022c6d45 | 485 | \r |
28a00297 | 486 | //\r |
487 | // Adjust pointer to the next 8-byte aligned boundry.\r | |
488 | //\r | |
489 | FfsHeader = (EFI_FFS_FILE_HEADER *)(((UINTN)FfsHeader + 7) & ~0x07);\r | |
022c6d45 | 490 | \r |
28a00297 | 491 | }\r |
492 | \r | |
493 | Done:\r | |
494 | if (EFI_ERROR (Status)) {\r | |
495 | FreeFvDeviceResource (FvDevice);\r | |
496 | }\r | |
497 | \r | |
498 | return Status;\r | |
499 | }\r | |
500 | \r | |
501 | \r | |
162ed594 | 502 | \r |
503 | /**\r | |
504 | This notification function is invoked when an instance of the\r | |
505 | EFI_FW_VOLUME_BLOCK_PROTOCOL is produced. It layers an instance of the\r | |
506 | EFI_FIRMWARE_VOLUME2_PROTOCOL on the same handle. This is the function where\r | |
507 | the actual initialization of the EFI_FIRMWARE_VOLUME2_PROTOCOL is done.\r | |
508 | \r | |
022c6d45 | 509 | @param Event The event that occured\r |
162ed594 | 510 | @param Context For EFI compatiblity. Not used.\r |
511 | \r | |
512 | **/\r | |
28a00297 | 513 | VOID\r |
514 | EFIAPI\r | |
515 | NotifyFwVolBlock (\r | |
516 | IN EFI_EVENT Event,\r | |
517 | IN VOID *Context\r | |
518 | )\r | |
28a00297 | 519 | {\r |
520 | EFI_HANDLE Handle;\r | |
521 | EFI_STATUS Status;\r | |
522 | UINTN BufferSize;\r | |
523 | EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb;\r | |
0c2b5da8 | 524 | EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv;\r |
28a00297 | 525 | FV_DEVICE *FvDevice;\r |
526 | EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;\r | |
527 | //\r | |
528 | // Examine all new handles\r | |
529 | //\r | |
530 | for (;;) {\r | |
531 | //\r | |
532 | // Get the next handle\r | |
533 | //\r | |
534 | BufferSize = sizeof (Handle);\r | |
535 | Status = CoreLocateHandle (\r | |
536 | ByRegisterNotify,\r | |
537 | NULL,\r | |
538 | gEfiFwVolBlockNotifyReg,\r | |
539 | &BufferSize,\r | |
540 | &Handle\r | |
541 | );\r | |
542 | \r | |
543 | //\r | |
544 | // If not found, we're done\r | |
545 | //\r | |
546 | if (EFI_NOT_FOUND == Status) {\r | |
547 | break;\r | |
548 | }\r | |
549 | \r | |
550 | if (EFI_ERROR (Status)) {\r | |
551 | continue;\r | |
552 | }\r | |
022c6d45 | 553 | \r |
28a00297 | 554 | //\r |
555 | // Get the FirmwareVolumeBlock protocol on that handle\r | |
556 | //\r | |
022c6d45 | 557 | Status = CoreHandleProtocol (Handle, &gEfiFirmwareVolumeBlockProtocolGuid, (VOID **)&Fvb);\r |
28a00297 | 558 | ASSERT_EFI_ERROR (Status);\r |
20bcdbcb | 559 | ASSERT (Fvb != NULL);\r |
28a00297 | 560 | \r |
561 | //\r | |
562 | // Make sure the Fv Header is O.K.\r | |
563 | //\r | |
564 | Status = GetFwVolHeader (Fvb, &FwVolHeader);\r | |
565 | if (EFI_ERROR (Status)) {\r | |
566 | return;\r | |
567 | }\r | |
568 | \r | |
569 | if (!VerifyFvHeaderChecksum (FwVolHeader)) {\r | |
570 | CoreFreePool (FwVolHeader);\r | |
571 | continue;\r | |
572 | }\r | |
573 | \r | |
574 | \r | |
575 | //\r | |
576 | // Check to see that the file system is indeed formatted in a way we can\r | |
577 | // understand it...\r | |
578 | //\r | |
9767823f | 579 | if (!CompareGuid (&FwVolHeader->FileSystemGuid, &gEfiFirmwareFileSystem2Guid)) {\r |
28a00297 | 580 | continue;\r |
581 | }\r | |
582 | \r | |
583 | //\r | |
584 | // Check if there is an FV protocol already installed in that handle\r | |
585 | //\r | |
0c2b5da8 | 586 | Status = CoreHandleProtocol (Handle, &gEfiFirmwareVolume2ProtocolGuid, (VOID **)&Fv);\r |
28a00297 | 587 | if (!EFI_ERROR (Status)) {\r |
588 | //\r | |
589 | // Update Fv to use a new Fvb\r | |
590 | //\r | |
50d7ebad | 591 | FvDevice = BASE_CR (Fv, FV_DEVICE, Fv);\r |
0c2b5da8 | 592 | if (FvDevice->Signature == FV2_DEVICE_SIGNATURE) {\r |
28a00297 | 593 | //\r |
594 | // Only write into our device structure if it's our device structure\r | |
595 | //\r | |
596 | FvDevice->Fvb = Fvb;\r | |
597 | }\r | |
598 | \r | |
599 | } else {\r | |
600 | //\r | |
601 | // No FwVol protocol on the handle so create a new one\r | |
602 | //\r | |
9c4ac31c | 603 | FvDevice = AllocateCopyPool (sizeof (FV_DEVICE), &mFvDevice);\r |
28a00297 | 604 | if (FvDevice == NULL) {\r |
605 | return;\r | |
606 | }\r | |
022c6d45 | 607 | \r |
e94a9ff7 | 608 | FvDevice->Fvb = Fvb;\r |
609 | FvDevice->Handle = Handle;\r | |
610 | FvDevice->FwVolHeader = FwVolHeader;\r | |
28a00297 | 611 | FvDevice->Fv.ParentHandle = Fvb->ParentHandle;\r |
022c6d45 | 612 | \r |
28a00297 | 613 | //\r |
614 | // Install an New FV protocol on the existing handle\r | |
615 | //\r | |
616 | Status = CoreInstallProtocolInterface (\r | |
617 | &Handle,\r | |
0c2b5da8 | 618 | &gEfiFirmwareVolume2ProtocolGuid,\r |
28a00297 | 619 | EFI_NATIVE_INTERFACE,\r |
620 | &FvDevice->Fv\r | |
621 | );\r | |
622 | ASSERT_EFI_ERROR (Status);\r | |
623 | }\r | |
624 | }\r | |
022c6d45 | 625 | \r |
28a00297 | 626 | return;\r |
627 | }\r | |
628 | \r | |
629 | \r | |
162ed594 | 630 | \r |
631 | /**\r | |
13492369 | 632 | This routine is the driver initialization entry point. It registers\r |
633 | a notification function. This notification function are responsible\r | |
634 | for building the FV stack dynamically.\r | |
162ed594 | 635 | \r |
022c6d45 | 636 | @param ImageHandle The image handle.\r |
637 | @param SystemTable The system table.\r | |
162ed594 | 638 | \r |
639 | @retval EFI_SUCCESS Function successfully returned.\r | |
640 | \r | |
641 | **/\r | |
28a00297 | 642 | EFI_STATUS\r |
643 | EFIAPI\r | |
644 | FwVolDriverInit (\r | |
645 | IN EFI_HANDLE ImageHandle,\r | |
646 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
647 | )\r | |
28a00297 | 648 | {\r |
7899b797 | 649 | gEfiFwVolBlockEvent = EfiCreateProtocolNotifyEvent (\r |
28a00297 | 650 | &gEfiFirmwareVolumeBlockProtocolGuid,\r |
651 | TPL_CALLBACK,\r | |
652 | NotifyFwVolBlock,\r | |
653 | NULL,\r | |
7899b797 | 654 | &gEfiFwVolBlockNotifyReg\r |
28a00297 | 655 | );\r |
656 | return EFI_SUCCESS;\r | |
657 | }\r | |
658 | \r | |
162ed594 | 659 | \r |