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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 |
1f33d186 | 6 | Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>\r |
cd5ebaa0 | 7 | This program and the accompanying materials\r |
23c98c94 | 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 | |
0c3a1db4 SZ |
48 | 0,\r |
49 | FALSE,\r | |
28a00297 | 50 | 0\r |
51 | };\r | |
52 | \r | |
53 | \r | |
54 | //\r | |
55 | // FFS helper functions\r | |
56 | //\r | |
162ed594 | 57 | /**\r |
657abcff LG |
58 | Read data from Firmware Block by FVB protocol Read. \r |
59 | The data may cross the multi block ranges.\r | |
60 | \r | |
61 | @param Fvb The FW_VOL_BLOCK_PROTOCOL instance from which to read data.\r | |
62 | @param StartLba Pointer to StartLba.\r | |
63 | On input, the start logical block index from which to read.\r | |
64 | On output,the end logical block index after reading.\r | |
65 | @param Offset Pointer to Offset\r | |
66 | On input, offset into the block at which to begin reading.\r | |
67 | On output, offset into the end block after reading.\r | |
68 | @param DataSize Size of data to be read.\r | |
69 | @param Data Pointer to Buffer that the data will be read into.\r | |
70 | \r | |
71 | @retval EFI_SUCCESS Successfully read data from firmware block.\r | |
72 | @retval others\r | |
73 | **/\r | |
74 | EFI_STATUS\r | |
75 | ReadFvbData (\r | |
76 | IN EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb,\r | |
77 | IN OUT EFI_LBA *StartLba,\r | |
78 | IN OUT UINTN *Offset,\r | |
79 | IN UINTN DataSize,\r | |
80 | OUT UINT8 *Data\r | |
81 | )\r | |
82 | {\r | |
83 | UINTN BlockSize;\r | |
84 | UINTN NumberOfBlocks;\r | |
85 | UINTN BlockIndex;\r | |
86 | UINTN ReadDataSize;\r | |
87 | EFI_STATUS Status;\r | |
88 | \r | |
89 | //\r | |
90 | // Try read data in current block\r | |
91 | //\r | |
92 | BlockIndex = 0;\r | |
93 | ReadDataSize = DataSize;\r | |
94 | Status = Fvb->Read (Fvb, *StartLba, *Offset, &ReadDataSize, Data);\r | |
95 | if (Status == EFI_SUCCESS) {\r | |
96 | *Offset += DataSize;\r | |
97 | return EFI_SUCCESS;\r | |
98 | } else if (Status != EFI_BAD_BUFFER_SIZE) {\r | |
99 | //\r | |
100 | // other error will direct return\r | |
101 | //\r | |
102 | return Status;\r | |
103 | }\r | |
104 | \r | |
105 | //\r | |
106 | // Data crosses the blocks, read data from next block\r | |
107 | //\r | |
108 | DataSize -= ReadDataSize;\r | |
109 | Data += ReadDataSize;\r | |
110 | *StartLba = *StartLba + 1;\r | |
111 | while (DataSize > 0) {\r | |
112 | Status = Fvb->GetBlockSize (Fvb, *StartLba, &BlockSize, &NumberOfBlocks);\r | |
113 | if (EFI_ERROR (Status)) {\r | |
114 | return Status;\r | |
115 | }\r | |
116 | \r | |
117 | //\r | |
118 | // Read data from the crossing blocks\r | |
119 | //\r | |
120 | BlockIndex = 0; \r | |
121 | while (BlockIndex < NumberOfBlocks && DataSize >= BlockSize) {\r | |
122 | Status = Fvb->Read (Fvb, *StartLba + BlockIndex, 0, &BlockSize, Data);\r | |
123 | if (EFI_ERROR (Status)) {\r | |
124 | return Status;\r | |
125 | }\r | |
126 | Data += BlockSize;\r | |
127 | DataSize -= BlockSize;\r | |
128 | BlockIndex ++;\r | |
129 | }\r | |
130 | \r | |
131 | //\r | |
132 | // Data doesn't exceed the current block range.\r | |
133 | //\r | |
134 | if (DataSize < BlockSize) {\r | |
135 | break;\r | |
136 | }\r | |
137 | \r | |
138 | //\r | |
139 | // Data must be got from the next block range.\r | |
140 | //\r | |
141 | *StartLba += NumberOfBlocks;\r | |
142 | }\r | |
143 | \r | |
144 | //\r | |
145 | // read the remaining data\r | |
146 | //\r | |
147 | if (DataSize > 0) {\r | |
148 | Status = Fvb->Read (Fvb, *StartLba + BlockIndex, 0, &DataSize, Data);\r | |
149 | if (EFI_ERROR (Status)) {\r | |
150 | return Status;\r | |
151 | }\r | |
152 | }\r | |
153 | \r | |
154 | //\r | |
155 | // Update Lba and Offset used by the following read.\r | |
156 | //\r | |
157 | *StartLba += BlockIndex;\r | |
158 | *Offset = DataSize;\r | |
159 | \r | |
160 | return EFI_SUCCESS;\r | |
161 | }\r | |
162 | \r | |
163 | /**\r | |
164 | Given the supplied FW_VOL_BLOCK_PROTOCOL, allocate a buffer for output and\r | |
165 | copy the real length volume header into it.\r | |
28a00297 | 166 | \r |
022c6d45 | 167 | @param Fvb The FW_VOL_BLOCK_PROTOCOL instance from which to\r |
168 | read the volume header\r | |
169 | @param FwVolHeader Pointer to pointer to allocated buffer in which\r | |
170 | the volume header is returned.\r | |
28a00297 | 171 | \r |
022c6d45 | 172 | @retval EFI_OUT_OF_RESOURCES No enough buffer could be allocated.\r |
173 | @retval EFI_SUCCESS Successfully read volume header to the allocated\r | |
162ed594 | 174 | buffer.\r |
28a00297 | 175 | \r |
162ed594 | 176 | **/\r |
177 | EFI_STATUS\r | |
178 | GetFwVolHeader (\r | |
179 | IN EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb,\r | |
180 | OUT EFI_FIRMWARE_VOLUME_HEADER **FwVolHeader\r | |
181 | )\r | |
28a00297 | 182 | {\r |
183 | EFI_STATUS Status;\r | |
184 | EFI_FIRMWARE_VOLUME_HEADER TempFvh;\r | |
185 | UINTN FvhLength;\r | |
657abcff LG |
186 | EFI_LBA StartLba;\r |
187 | UINTN Offset;\r | |
28a00297 | 188 | UINT8 *Buffer;\r |
657abcff | 189 | \r |
28a00297 | 190 | //\r |
657abcff | 191 | // Read the standard FV header\r |
28a00297 | 192 | //\r |
657abcff LG |
193 | StartLba = 0;\r |
194 | Offset = 0;\r | |
28a00297 | 195 | FvhLength = sizeof (EFI_FIRMWARE_VOLUME_HEADER);\r |
657abcff | 196 | Status = ReadFvbData (Fvb, &StartLba, &Offset, FvhLength, (UINT8 *)&TempFvh);\r |
13492369 | 197 | if (EFI_ERROR (Status)) {\r |
198 | return Status;\r | |
199 | }\r | |
28a00297 | 200 | \r |
201 | //\r | |
202 | // Allocate a buffer for the caller\r | |
203 | //\r | |
9c4ac31c | 204 | *FwVolHeader = AllocatePool (TempFvh.HeaderLength);\r |
28a00297 | 205 | if (*FwVolHeader == NULL) {\r |
206 | return EFI_OUT_OF_RESOURCES;\r | |
207 | }\r | |
208 | \r | |
209 | //\r | |
210 | // Copy the standard header into the buffer\r | |
211 | //\r | |
212 | CopyMem (*FwVolHeader, &TempFvh, sizeof (EFI_FIRMWARE_VOLUME_HEADER));\r | |
213 | \r | |
214 | //\r | |
215 | // Read the rest of the header\r | |
216 | //\r | |
217 | FvhLength = TempFvh.HeaderLength - sizeof (EFI_FIRMWARE_VOLUME_HEADER);\r | |
218 | Buffer = (UINT8 *)*FwVolHeader + sizeof (EFI_FIRMWARE_VOLUME_HEADER);\r | |
657abcff | 219 | Status = ReadFvbData (Fvb, &StartLba, &Offset, FvhLength, Buffer);\r |
28a00297 | 220 | if (EFI_ERROR (Status)) {\r |
221 | //\r | |
222 | // Read failed so free buffer\r | |
223 | //\r | |
224 | CoreFreePool (*FwVolHeader);\r | |
225 | }\r | |
022c6d45 | 226 | \r |
28a00297 | 227 | return Status;\r |
228 | }\r | |
229 | \r | |
230 | \r | |
28a00297 | 231 | \r |
162ed594 | 232 | /**\r |
28a00297 | 233 | Free FvDevice resource when error happens\r |
234 | \r | |
022c6d45 | 235 | @param FvDevice pointer to the FvDevice to be freed.\r |
28a00297 | 236 | \r |
162ed594 | 237 | **/\r |
162ed594 | 238 | VOID\r |
239 | FreeFvDeviceResource (\r | |
240 | IN FV_DEVICE *FvDevice\r | |
241 | )\r | |
28a00297 | 242 | {\r |
243 | FFS_FILE_LIST_ENTRY *FfsFileEntry;\r | |
244 | LIST_ENTRY *NextEntry;\r | |
245 | \r | |
246 | //\r | |
247 | // Free File List Entry\r | |
248 | //\r | |
249 | FfsFileEntry = (FFS_FILE_LIST_ENTRY *)FvDevice->FfsFileListHeader.ForwardLink;\r | |
250 | while (&FfsFileEntry->Link != &FvDevice->FfsFileListHeader) {\r | |
251 | NextEntry = (&FfsFileEntry->Link)->ForwardLink;\r | |
022c6d45 | 252 | \r |
28a00297 | 253 | if (FfsFileEntry->StreamHandle != 0) {\r |
254 | //\r | |
255 | // Close stream and free resources from SEP\r | |
256 | //\r | |
797a9d67 | 257 | CloseSectionStream (FfsFileEntry->StreamHandle);\r |
28a00297 | 258 | }\r |
259 | \r | |
260 | CoreFreePool (FfsFileEntry);\r | |
261 | \r | |
e94a9ff7 | 262 | FfsFileEntry = (FFS_FILE_LIST_ENTRY *) NextEntry;\r |
28a00297 | 263 | }\r |
264 | \r | |
265 | \r | |
266 | //\r | |
267 | // Free the cache\r | |
268 | //\r | |
269 | CoreFreePool (FvDevice->CachedFv);\r | |
270 | \r | |
271 | //\r | |
272 | // Free Volume Header\r | |
273 | //\r | |
274 | CoreFreePool (FvDevice->FwVolHeader);\r | |
275 | \r | |
276 | return;\r | |
277 | }\r | |
278 | \r | |
279 | \r | |
28a00297 | 280 | \r |
162ed594 | 281 | /**\r |
e94a9ff7 | 282 | Check if an FV is consistent and allocate cache for it.\r |
28a00297 | 283 | \r |
022c6d45 | 284 | @param FvDevice A pointer to the FvDevice to be checked.\r |
28a00297 | 285 | \r |
022c6d45 | 286 | @retval EFI_OUT_OF_RESOURCES No enough buffer could be allocated.\r |
287 | @retval EFI_SUCCESS FV is consistent and cache is allocated.\r | |
162ed594 | 288 | @retval EFI_VOLUME_CORRUPTED File system is corrupted.\r |
28a00297 | 289 | \r |
162ed594 | 290 | **/\r |
291 | EFI_STATUS\r | |
292 | FvCheck (\r | |
293 | IN OUT FV_DEVICE *FvDevice\r | |
294 | )\r | |
28a00297 | 295 | {\r |
296 | EFI_STATUS Status;\r | |
297 | EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb;\r | |
298 | EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;\r | |
f95f107c | 299 | EFI_FIRMWARE_VOLUME_EXT_HEADER *FwVolExtHeader;\r |
8ee3a199 | 300 | EFI_FVB_ATTRIBUTES_2 FvbAttributes;\r |
28a00297 | 301 | EFI_FV_BLOCK_MAP_ENTRY *BlockMap;\r |
302 | FFS_FILE_LIST_ENTRY *FfsFileEntry;\r | |
303 | EFI_FFS_FILE_HEADER *FfsHeader;\r | |
304 | UINT8 *CacheLocation;\r | |
305 | UINTN LbaOffset;\r | |
657abcff | 306 | UINTN HeaderSize;\r |
28a00297 | 307 | UINTN Index;\r |
308 | EFI_LBA LbaIndex;\r | |
309 | UINTN Size;\r | |
28a00297 | 310 | EFI_FFS_FILE_STATE FileState;\r |
311 | UINT8 *TopFvAddress;\r | |
312 | UINTN TestLength;\r | |
313 | \r | |
314 | \r | |
315 | Fvb = FvDevice->Fvb;\r | |
316 | FwVolHeader = FvDevice->FwVolHeader;\r | |
022c6d45 | 317 | \r |
28a00297 | 318 | Status = Fvb->GetAttributes (Fvb, &FvbAttributes);\r |
319 | if (EFI_ERROR (Status)) {\r | |
320 | return Status;\r | |
321 | }\r | |
322 | \r | |
323 | //\r | |
324 | // Size is the size of the FV minus the head. We have already allocated\r | |
325 | // the header to check to make sure the volume is valid\r | |
326 | //\r | |
327 | Size = (UINTN)(FwVolHeader->FvLength - FwVolHeader->HeaderLength);\r | |
9c4ac31c | 328 | FvDevice->CachedFv = AllocatePool (Size);\r |
28a00297 | 329 | \r |
330 | if (FvDevice->CachedFv == NULL) {\r | |
331 | return EFI_OUT_OF_RESOURCES;\r | |
332 | }\r | |
333 | \r | |
334 | //\r | |
335 | // Remember a pointer to the end fo the CachedFv\r | |
336 | //\r | |
337 | FvDevice->EndOfCachedFv = FvDevice->CachedFv + Size;\r | |
338 | \r | |
339 | //\r | |
340 | // Copy FV minus header into memory using the block map we have all ready\r | |
341 | // read into memory.\r | |
342 | //\r | |
343 | BlockMap = FwVolHeader->BlockMap;\r | |
344 | CacheLocation = FvDevice->CachedFv;\r | |
345 | LbaIndex = 0;\r | |
657abcff LG |
346 | LbaOffset = 0;\r |
347 | HeaderSize = FwVolHeader->HeaderLength;\r | |
28a00297 | 348 | while ((BlockMap->NumBlocks != 0) || (BlockMap->Length != 0)) {\r |
657abcff LG |
349 | Index = 0;\r |
350 | Size = BlockMap->Length;\r | |
351 | if (HeaderSize > 0) {\r | |
352 | //\r | |
353 | // Skip header size\r | |
354 | //\r | |
355 | for (; Index < BlockMap->NumBlocks && HeaderSize >= BlockMap->Length; Index ++) {\r | |
356 | HeaderSize -= BlockMap->Length;\r | |
357 | LbaIndex ++;\r | |
358 | }\r | |
022c6d45 | 359 | \r |
657abcff LG |
360 | //\r |
361 | // Check whether FvHeader is crossing the multi block range.\r | |
362 | //\r | |
2fc46f86 | 363 | if (Index >= BlockMap->NumBlocks) {\r |
657abcff LG |
364 | BlockMap++;\r |
365 | continue;\r | |
366 | } else if (HeaderSize > 0) {\r | |
367 | LbaOffset = HeaderSize;\r | |
368 | Size = BlockMap->Length - HeaderSize;\r | |
369 | HeaderSize = 0;\r | |
28a00297 | 370 | }\r |
657abcff LG |
371 | }\r |
372 | \r | |
373 | //\r | |
374 | // read the FV data \r | |
375 | //\r | |
376 | for (; Index < BlockMap->NumBlocks; Index ++) {\r | |
28a00297 | 377 | Status = Fvb->Read (Fvb,\r |
e94a9ff7 | 378 | LbaIndex,\r |
379 | LbaOffset,\r | |
380 | &Size,\r | |
381 | CacheLocation\r | |
382 | );\r | |
657abcff | 383 | \r |
28a00297 | 384 | //\r |
385 | // Not check EFI_BAD_BUFFER_SIZE, for Size = BlockMap->Length\r | |
386 | //\r | |
387 | if (EFI_ERROR (Status)) {\r | |
388 | goto Done;\r | |
389 | }\r | |
022c6d45 | 390 | \r |
657abcff LG |
391 | LbaIndex++;\r |
392 | CacheLocation += Size;\r | |
393 | \r | |
28a00297 | 394 | //\r |
395 | // After we skip Fv Header always read from start of block\r | |
396 | //\r | |
397 | LbaOffset = 0;\r | |
657abcff | 398 | Size = BlockMap->Length;\r |
28a00297 | 399 | }\r |
657abcff | 400 | \r |
28a00297 | 401 | BlockMap++;\r |
402 | }\r | |
403 | \r | |
404 | //\r | |
405 | // Scan to check the free space & File list\r | |
406 | //\r | |
71f68914 | 407 | if ((FvbAttributes & EFI_FVB2_ERASE_POLARITY) != 0) {\r |
28a00297 | 408 | FvDevice->ErasePolarity = 1;\r |
409 | } else {\r | |
410 | FvDevice->ErasePolarity = 0;\r | |
022c6d45 | 411 | }\r |
28a00297 | 412 | \r |
413 | \r | |
414 | //\r | |
415 | // go through the whole FV cache, check the consistence of the FV.\r | |
f95f107c | 416 | // Make a linked list of all the Ffs file headers\r |
28a00297 | 417 | //\r |
418 | Status = EFI_SUCCESS;\r | |
419 | InitializeListHead (&FvDevice->FfsFileListHeader);\r | |
420 | \r | |
421 | //\r | |
422 | // Build FFS list\r | |
423 | //\r | |
f95f107c SZ |
424 | if (FwVolHeader->ExtHeaderOffset != 0) {\r |
425 | //\r | |
426 | // Searching for files starts on an 8 byte aligned boundary after the end of the Extended Header if it exists.\r | |
427 | //\r | |
428 | FwVolExtHeader = (EFI_FIRMWARE_VOLUME_EXT_HEADER *) (FvDevice->CachedFv + (FwVolHeader->ExtHeaderOffset - FwVolHeader->HeaderLength));\r | |
429 | FfsHeader = (EFI_FFS_FILE_HEADER *) ((UINT8 *) FwVolExtHeader + FwVolExtHeader->ExtHeaderSize);\r | |
430 | FfsHeader = (EFI_FFS_FILE_HEADER *) ALIGN_POINTER (FfsHeader, 8);\r | |
431 | } else {\r | |
432 | FfsHeader = (EFI_FFS_FILE_HEADER *) (FvDevice->CachedFv);\r | |
433 | }\r | |
28a00297 | 434 | TopFvAddress = FvDevice->EndOfCachedFv;\r |
e94a9ff7 | 435 | while ((UINT8 *) FfsHeader < TopFvAddress) {\r |
28a00297 | 436 | \r |
e94a9ff7 | 437 | TestLength = TopFvAddress - ((UINT8 *) FfsHeader);\r |
28a00297 | 438 | if (TestLength > sizeof (EFI_FFS_FILE_HEADER)) {\r |
439 | TestLength = sizeof (EFI_FFS_FILE_HEADER);\r | |
440 | }\r | |
441 | \r | |
442 | if (IsBufferErased (FvDevice->ErasePolarity, FfsHeader, TestLength)) {\r | |
443 | //\r | |
444 | // We have found the free space so we are done!\r | |
445 | //\r | |
446 | goto Done;\r | |
447 | }\r | |
448 | \r | |
449 | if (!IsValidFfsHeader (FvDevice->ErasePolarity, FfsHeader, &FileState)) {\r | |
022c6d45 | 450 | if ((FileState == EFI_FILE_HEADER_INVALID) ||\r |
28a00297 | 451 | (FileState == EFI_FILE_HEADER_CONSTRUCTION)) {\r |
6c85d162 SZ |
452 | if (IS_FFS_FILE2 (FfsHeader)) {\r |
453 | if (!FvDevice->IsFfs3Fv) {\r | |
454 | DEBUG ((EFI_D_ERROR, "Found a FFS3 formatted file: %g in a non-FFS3 formatted FV.\n", &FfsHeader->Name));\r | |
455 | }\r | |
456 | FfsHeader = (EFI_FFS_FILE_HEADER *) ((UINT8 *) FfsHeader + sizeof (EFI_FFS_FILE_HEADER2));\r | |
457 | } else {\r | |
458 | FfsHeader = (EFI_FFS_FILE_HEADER *) ((UINT8 *) FfsHeader + sizeof (EFI_FFS_FILE_HEADER));\r | |
459 | }\r | |
28a00297 | 460 | continue;\r |
28a00297 | 461 | } else {\r |
462 | //\r | |
463 | // File system is corrputed\r | |
464 | //\r | |
465 | Status = EFI_VOLUME_CORRUPTED;\r | |
466 | goto Done;\r | |
467 | }\r | |
468 | }\r | |
469 | \r | |
470 | if (!IsValidFfsFile (FvDevice->ErasePolarity, FfsHeader)) {\r | |
471 | //\r | |
472 | // File system is corrupted\r | |
473 | //\r | |
474 | Status = EFI_VOLUME_CORRUPTED;\r | |
475 | goto Done;\r | |
476 | }\r | |
477 | \r | |
6c85d162 SZ |
478 | if (IS_FFS_FILE2 (FfsHeader)) {\r |
479 | ASSERT (FFS_FILE2_SIZE (FfsHeader) > 0x00FFFFFF);\r | |
480 | if (!FvDevice->IsFfs3Fv) {\r | |
481 | DEBUG ((EFI_D_ERROR, "Found a FFS3 formatted file: %g in a non-FFS3 formatted FV.\n", &FfsHeader->Name));\r | |
482 | FfsHeader = (EFI_FFS_FILE_HEADER *) ((UINT8 *) FfsHeader + FFS_FILE2_SIZE (FfsHeader));\r | |
483 | //\r | |
484 | // Adjust pointer to the next 8-byte aligned boundry.\r | |
485 | //\r | |
486 | FfsHeader = (EFI_FFS_FILE_HEADER *) (((UINTN) FfsHeader + 7) & ~0x07);\r | |
487 | continue;\r | |
488 | }\r | |
489 | }\r | |
28a00297 | 490 | \r |
491 | FileState = GetFileState (FvDevice->ErasePolarity, FfsHeader);\r | |
022c6d45 | 492 | \r |
28a00297 | 493 | //\r |
494 | // check for non-deleted file\r | |
495 | //\r | |
496 | if (FileState != EFI_FILE_DELETED) {\r | |
497 | //\r | |
498 | // Create a FFS list entry for each non-deleted file\r | |
499 | //\r | |
9c4ac31c | 500 | FfsFileEntry = AllocateZeroPool (sizeof (FFS_FILE_LIST_ENTRY));\r |
28a00297 | 501 | if (FfsFileEntry == NULL) {\r |
502 | Status = EFI_OUT_OF_RESOURCES;\r | |
503 | goto Done;\r | |
504 | }\r | |
022c6d45 | 505 | \r |
28a00297 | 506 | FfsFileEntry->FfsHeader = FfsHeader;\r |
507 | InsertTailList (&FvDevice->FfsFileListHeader, &FfsFileEntry->Link);\r | |
508 | }\r | |
509 | \r | |
6c85d162 SZ |
510 | if (IS_FFS_FILE2 (FfsHeader)) {\r |
511 | FfsHeader = (EFI_FFS_FILE_HEADER *) ((UINT8 *) FfsHeader + FFS_FILE2_SIZE (FfsHeader));\r | |
512 | } else {\r | |
513 | FfsHeader = (EFI_FFS_FILE_HEADER *) ((UINT8 *) FfsHeader + FFS_FILE_SIZE (FfsHeader));\r | |
514 | }\r | |
022c6d45 | 515 | \r |
28a00297 | 516 | //\r |
517 | // Adjust pointer to the next 8-byte aligned boundry.\r | |
518 | //\r | |
519 | FfsHeader = (EFI_FFS_FILE_HEADER *)(((UINTN)FfsHeader + 7) & ~0x07);\r | |
022c6d45 | 520 | \r |
28a00297 | 521 | }\r |
522 | \r | |
523 | Done:\r | |
524 | if (EFI_ERROR (Status)) {\r | |
525 | FreeFvDeviceResource (FvDevice);\r | |
526 | }\r | |
527 | \r | |
528 | return Status;\r | |
529 | }\r | |
530 | \r | |
531 | \r | |
162ed594 | 532 | \r |
533 | /**\r | |
534 | This notification function is invoked when an instance of the\r | |
6c85d162 | 535 | EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL is produced. It layers an instance of the\r |
162ed594 | 536 | EFI_FIRMWARE_VOLUME2_PROTOCOL on the same handle. This is the function where\r |
537 | the actual initialization of the EFI_FIRMWARE_VOLUME2_PROTOCOL is done.\r | |
538 | \r | |
022c6d45 | 539 | @param Event The event that occured\r |
162ed594 | 540 | @param Context For EFI compatiblity. Not used.\r |
541 | \r | |
542 | **/\r | |
28a00297 | 543 | VOID\r |
544 | EFIAPI\r | |
545 | NotifyFwVolBlock (\r | |
546 | IN EFI_EVENT Event,\r | |
547 | IN VOID *Context\r | |
548 | )\r | |
28a00297 | 549 | {\r |
550 | EFI_HANDLE Handle;\r | |
551 | EFI_STATUS Status;\r | |
552 | UINTN BufferSize;\r | |
553 | EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb;\r | |
0c2b5da8 | 554 | EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv;\r |
28a00297 | 555 | FV_DEVICE *FvDevice;\r |
556 | EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;\r | |
557 | //\r | |
558 | // Examine all new handles\r | |
559 | //\r | |
560 | for (;;) {\r | |
561 | //\r | |
562 | // Get the next handle\r | |
563 | //\r | |
564 | BufferSize = sizeof (Handle);\r | |
565 | Status = CoreLocateHandle (\r | |
566 | ByRegisterNotify,\r | |
567 | NULL,\r | |
568 | gEfiFwVolBlockNotifyReg,\r | |
569 | &BufferSize,\r | |
570 | &Handle\r | |
571 | );\r | |
572 | \r | |
573 | //\r | |
574 | // If not found, we're done\r | |
575 | //\r | |
576 | if (EFI_NOT_FOUND == Status) {\r | |
577 | break;\r | |
578 | }\r | |
579 | \r | |
580 | if (EFI_ERROR (Status)) {\r | |
581 | continue;\r | |
582 | }\r | |
022c6d45 | 583 | \r |
28a00297 | 584 | //\r |
585 | // Get the FirmwareVolumeBlock protocol on that handle\r | |
586 | //\r | |
022c6d45 | 587 | Status = CoreHandleProtocol (Handle, &gEfiFirmwareVolumeBlockProtocolGuid, (VOID **)&Fvb);\r |
28a00297 | 588 | ASSERT_EFI_ERROR (Status);\r |
20bcdbcb | 589 | ASSERT (Fvb != NULL);\r |
28a00297 | 590 | \r |
591 | //\r | |
592 | // Make sure the Fv Header is O.K.\r | |
593 | //\r | |
594 | Status = GetFwVolHeader (Fvb, &FwVolHeader);\r | |
595 | if (EFI_ERROR (Status)) {\r | |
596 | return;\r | |
597 | }\r | |
d2fbaaab | 598 | ASSERT (FwVolHeader != NULL);\r |
28a00297 | 599 | \r |
600 | if (!VerifyFvHeaderChecksum (FwVolHeader)) {\r | |
601 | CoreFreePool (FwVolHeader);\r | |
602 | continue;\r | |
603 | }\r | |
604 | \r | |
605 | \r | |
606 | //\r | |
607 | // Check to see that the file system is indeed formatted in a way we can\r | |
608 | // understand it...\r | |
609 | //\r | |
6c85d162 SZ |
610 | if ((!CompareGuid (&FwVolHeader->FileSystemGuid, &gEfiFirmwareFileSystem2Guid)) &&\r |
611 | (!CompareGuid (&FwVolHeader->FileSystemGuid, &gEfiFirmwareFileSystem3Guid))) {\r | |
28a00297 | 612 | continue;\r |
613 | }\r | |
614 | \r | |
615 | //\r | |
616 | // Check if there is an FV protocol already installed in that handle\r | |
617 | //\r | |
0c2b5da8 | 618 | Status = CoreHandleProtocol (Handle, &gEfiFirmwareVolume2ProtocolGuid, (VOID **)&Fv);\r |
28a00297 | 619 | if (!EFI_ERROR (Status)) {\r |
620 | //\r | |
621 | // Update Fv to use a new Fvb\r | |
622 | //\r | |
50d7ebad | 623 | FvDevice = BASE_CR (Fv, FV_DEVICE, Fv);\r |
0c2b5da8 | 624 | if (FvDevice->Signature == FV2_DEVICE_SIGNATURE) {\r |
28a00297 | 625 | //\r |
626 | // Only write into our device structure if it's our device structure\r | |
627 | //\r | |
628 | FvDevice->Fvb = Fvb;\r | |
629 | }\r | |
630 | \r | |
631 | } else {\r | |
632 | //\r | |
633 | // No FwVol protocol on the handle so create a new one\r | |
634 | //\r | |
9c4ac31c | 635 | FvDevice = AllocateCopyPool (sizeof (FV_DEVICE), &mFvDevice);\r |
28a00297 | 636 | if (FvDevice == NULL) {\r |
637 | return;\r | |
638 | }\r | |
022c6d45 | 639 | \r |
e94a9ff7 | 640 | FvDevice->Fvb = Fvb;\r |
641 | FvDevice->Handle = Handle;\r | |
642 | FvDevice->FwVolHeader = FwVolHeader;\r | |
6c85d162 | 643 | FvDevice->IsFfs3Fv = CompareGuid (&FwVolHeader->FileSystemGuid, &gEfiFirmwareFileSystem3Guid);\r |
0c3a1db4 SZ |
644 | FvDevice->Fv.ParentHandle = Fvb->ParentHandle;\r |
645 | \r | |
646 | if (Fvb->ParentHandle != NULL) {\r | |
647 | //\r | |
648 | // Inherit the authentication status from FVB.\r | |
649 | //\r | |
650 | FvDevice->AuthenticationStatus = GetFvbAuthenticationStatus (Fvb);\r | |
651 | }\r | |
1f33d186 LG |
652 | \r |
653 | if (!EFI_ERROR (FvCheck (FvDevice))) {\r | |
654 | //\r | |
655 | // Install an New FV protocol on the existing handle\r | |
656 | //\r | |
657 | Status = CoreInstallProtocolInterface (\r | |
658 | &Handle,\r | |
659 | &gEfiFirmwareVolume2ProtocolGuid,\r | |
660 | EFI_NATIVE_INTERFACE,\r | |
661 | &FvDevice->Fv\r | |
662 | );\r | |
663 | ASSERT_EFI_ERROR (Status);\r | |
664 | } else {\r | |
665 | //\r | |
666 | // Free FvDevice Buffer for the corrupt FV image.\r | |
667 | //\r | |
668 | CoreFreePool (FvDevice);\r | |
669 | }\r | |
28a00297 | 670 | }\r |
671 | }\r | |
022c6d45 | 672 | \r |
28a00297 | 673 | return;\r |
674 | }\r | |
675 | \r | |
676 | \r | |
162ed594 | 677 | \r |
678 | /**\r | |
13492369 | 679 | This routine is the driver initialization entry point. It registers\r |
680 | a notification function. This notification function are responsible\r | |
681 | for building the FV stack dynamically.\r | |
162ed594 | 682 | \r |
022c6d45 | 683 | @param ImageHandle The image handle.\r |
684 | @param SystemTable The system table.\r | |
162ed594 | 685 | \r |
686 | @retval EFI_SUCCESS Function successfully returned.\r | |
687 | \r | |
688 | **/\r | |
28a00297 | 689 | EFI_STATUS\r |
690 | EFIAPI\r | |
691 | FwVolDriverInit (\r | |
692 | IN EFI_HANDLE ImageHandle,\r | |
693 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
694 | )\r | |
28a00297 | 695 | {\r |
7899b797 | 696 | gEfiFwVolBlockEvent = EfiCreateProtocolNotifyEvent (\r |
28a00297 | 697 | &gEfiFirmwareVolumeBlockProtocolGuid,\r |
698 | TPL_CALLBACK,\r | |
699 | NotifyFwVolBlock,\r | |
700 | NULL,\r | |
7899b797 | 701 | &gEfiFwVolBlockNotifyReg\r |
28a00297 | 702 | );\r |
703 | return EFI_SUCCESS;\r | |
704 | }\r | |
705 | \r | |
162ed594 | 706 | \r |