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Commit | Line | Data |
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2f4dfa84 JJ |
1 | /** @file\r |
2 | FAT file system access routines for FAT recovery PEIM\r | |
3 | \r | |
e38f26a2 | 4 | Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r |
2f4dfa84 | 5 | \r |
eb6cb4ce | 6 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
2f4dfa84 JJ |
7 | \r |
8 | **/\r | |
9 | \r | |
10 | #include "FatLitePeim.h"\r | |
11 | \r | |
12 | \r | |
13 | /**\r | |
14 | Check if there is a valid FAT in the corresponding Block device\r | |
15 | of the volume and if yes, fill in the relevant fields for the\r | |
16 | volume structure. Note there should be a valid Block device number\r | |
17 | already set.\r | |
18 | \r | |
e38f26a2 LG |
19 | @param PrivateData Global memory map for accessing global\r |
20 | variables.\r | |
21 | @param Volume On input, the BlockDeviceNumber field of the\r | |
22 | Volume should be a valid value. On successful\r | |
23 | output, all fields except the VolumeNumber\r | |
24 | field is initialized.\r | |
2f4dfa84 | 25 | \r |
e38f26a2 LG |
26 | @retval EFI_SUCCESS A FAT is found and the volume structure is\r |
27 | initialized.\r | |
28 | @retval EFI_NOT_FOUND There is no FAT on the corresponding device.\r | |
2f4dfa84 JJ |
29 | @retval EFI_DEVICE_ERROR There is something error while accessing device.\r |
30 | \r | |
31 | **/\r | |
32 | EFI_STATUS\r | |
33 | FatGetBpbInfo (\r | |
34 | IN PEI_FAT_PRIVATE_DATA *PrivateData,\r | |
35 | IN OUT PEI_FAT_VOLUME *Volume\r | |
36 | )\r | |
37 | {\r | |
38 | EFI_STATUS Status;\r | |
39 | PEI_FAT_BOOT_SECTOR Bpb;\r | |
40 | PEI_FAT_BOOT_SECTOR_EX BpbEx;\r | |
41 | UINT32 Sectors;\r | |
42 | UINT32 SectorsPerFat;\r | |
43 | UINT32 RootDirSectors;\r | |
44 | UINT64 FatLba;\r | |
45 | UINT64 RootLba;\r | |
46 | UINT64 FirstClusterLba;\r | |
47 | \r | |
48 | //\r | |
49 | // Read in the BPB\r | |
50 | //\r | |
51 | Status = FatReadDisk (\r | |
52 | PrivateData,\r | |
53 | Volume->BlockDeviceNo,\r | |
54 | 0,\r | |
55 | sizeof (PEI_FAT_BOOT_SECTOR_EX),\r | |
56 | &BpbEx\r | |
57 | );\r | |
58 | if (EFI_ERROR (Status)) {\r | |
59 | return Status;\r | |
60 | }\r | |
61 | \r | |
62 | CopyMem (\r | |
63 | (UINT8 *) (&Bpb),\r | |
64 | (UINT8 *) (&BpbEx),\r | |
65 | sizeof (PEI_FAT_BOOT_SECTOR)\r | |
66 | );\r | |
67 | \r | |
68 | Volume->FatType = FatUnknown;\r | |
69 | \r | |
70 | Sectors = Bpb.Sectors;\r | |
71 | if (Sectors == 0) {\r | |
72 | Sectors = Bpb.LargeSectors;\r | |
73 | }\r | |
74 | \r | |
75 | SectorsPerFat = Bpb.SectorsPerFat;\r | |
76 | if (SectorsPerFat == 0) {\r | |
77 | SectorsPerFat = BpbEx.LargeSectorsPerFat;\r | |
78 | Volume->FatType = Fat32;\r | |
79 | }\r | |
80 | //\r | |
81 | // Filter out those not a FAT\r | |
82 | //\r | |
83 | if (Bpb.Ia32Jump[0] != 0xe9 && Bpb.Ia32Jump[0] != 0xeb && Bpb.Ia32Jump[0] != 0x49) {\r | |
84 | return EFI_NOT_FOUND;\r | |
85 | }\r | |
86 | \r | |
87 | if (Bpb.ReservedSectors == 0 || Bpb.NoFats == 0 || Sectors == 0) {\r | |
88 | return EFI_NOT_FOUND;\r | |
89 | }\r | |
90 | \r | |
91 | if (Bpb.SectorsPerCluster != 1 &&\r | |
92 | Bpb.SectorsPerCluster != 2 &&\r | |
93 | Bpb.SectorsPerCluster != 4 &&\r | |
94 | Bpb.SectorsPerCluster != 8 &&\r | |
95 | Bpb.SectorsPerCluster != 16 &&\r | |
96 | Bpb.SectorsPerCluster != 32 &&\r | |
97 | Bpb.SectorsPerCluster != 64 &&\r | |
98 | Bpb.SectorsPerCluster != 128\r | |
99 | ) {\r | |
100 | return EFI_NOT_FOUND;\r | |
101 | }\r | |
102 | \r | |
103 | if (Volume->FatType == Fat32 && (SectorsPerFat == 0 || BpbEx.FsVersion != 0)) {\r | |
104 | return EFI_NOT_FOUND;\r | |
105 | }\r | |
106 | \r | |
107 | if (Bpb.Media != 0xf0 &&\r | |
108 | Bpb.Media != 0xf8 &&\r | |
109 | Bpb.Media != 0xf9 &&\r | |
110 | Bpb.Media != 0xfb &&\r | |
111 | Bpb.Media != 0xfc &&\r | |
112 | Bpb.Media != 0xfd &&\r | |
113 | Bpb.Media != 0xfe &&\r | |
114 | Bpb.Media != 0xff &&\r | |
115 | //\r | |
116 | // FujitsuFMR\r | |
117 | //\r | |
118 | Bpb.Media != 0x00 &&\r | |
119 | Bpb.Media != 0x01 &&\r | |
120 | Bpb.Media != 0xfa\r | |
121 | ) {\r | |
122 | return EFI_NOT_FOUND;\r | |
123 | }\r | |
124 | \r | |
125 | if (Volume->FatType != Fat32 && Bpb.RootEntries == 0) {\r | |
126 | return EFI_NOT_FOUND;\r | |
127 | }\r | |
128 | //\r | |
129 | // If this is fat32, refuse to mount mirror-disabled volumes\r | |
130 | //\r | |
131 | if (Volume->FatType == Fat32 && ((BpbEx.ExtendedFlags & 0x80) != 0)) {\r | |
132 | return EFI_NOT_FOUND;\r | |
133 | }\r | |
134 | //\r | |
135 | // Fill in the volume structure fields\r | |
136 | // (Sectors & SectorsPerFat is computed earlier already)\r | |
137 | //\r | |
138 | Volume->ClusterSize = Bpb.SectorSize * Bpb.SectorsPerCluster;\r | |
139 | Volume->RootEntries = Bpb.RootEntries;\r | |
140 | Volume->SectorSize = Bpb.SectorSize;\r | |
141 | \r | |
142 | RootDirSectors = ((Volume->RootEntries * sizeof (FAT_DIRECTORY_ENTRY)) + (Volume->SectorSize - 1)) / Volume->SectorSize;\r | |
143 | \r | |
144 | FatLba = Bpb.ReservedSectors;\r | |
145 | RootLba = Bpb.NoFats * SectorsPerFat + FatLba;\r | |
146 | FirstClusterLba = RootLba + RootDirSectors;\r | |
147 | \r | |
148 | Volume->VolumeSize = MultU64x32 (Sectors, Volume->SectorSize);\r | |
149 | Volume->FatPos = MultU64x32 (FatLba, Volume->SectorSize);\r | |
150 | Volume->RootDirPos = MultU64x32 (RootLba, Volume->SectorSize);\r | |
151 | Volume->FirstClusterPos = MultU64x32 (FirstClusterLba, Volume->SectorSize);\r | |
152 | Volume->MaxCluster = (UINT32) (Sectors - FirstClusterLba) / Bpb.SectorsPerCluster;\r | |
153 | Volume->RootDirCluster = BpbEx.RootDirFirstCluster;\r | |
154 | \r | |
155 | //\r | |
156 | // If this is not a fat32, determine if it's a fat16 or fat12\r | |
157 | //\r | |
158 | if (Volume->FatType != Fat32) {\r | |
159 | \r | |
160 | if (Volume->MaxCluster >= 65525) {\r | |
161 | return EFI_NOT_FOUND;\r | |
162 | }\r | |
163 | \r | |
164 | Volume->FatType = Volume->MaxCluster < 4085 ? Fat12 : Fat16;\r | |
165 | }\r | |
166 | \r | |
167 | return EFI_SUCCESS;\r | |
168 | }\r | |
169 | \r | |
170 | \r | |
171 | /**\r | |
172 | Gets the next cluster in the cluster chain\r | |
173 | \r | |
e38f26a2 LG |
174 | @param PrivateData Global memory map for accessing global variables\r |
175 | @param Volume The volume\r | |
176 | @param Cluster The cluster\r | |
177 | @param NextCluster The cluster number of the next cluster\r | |
2f4dfa84 | 178 | \r |
e38f26a2 LG |
179 | @retval EFI_SUCCESS The address is got\r |
180 | @retval EFI_INVALID_PARAMETER ClusterNo exceeds the MaxCluster of the volume.\r | |
2f4dfa84 JJ |
181 | @retval EFI_DEVICE_ERROR Read disk error\r |
182 | \r | |
183 | **/\r | |
184 | EFI_STATUS\r | |
185 | FatGetNextCluster (\r | |
186 | IN PEI_FAT_PRIVATE_DATA *PrivateData,\r | |
187 | IN PEI_FAT_VOLUME *Volume,\r | |
188 | IN UINT32 Cluster,\r | |
189 | OUT UINT32 *NextCluster\r | |
190 | )\r | |
191 | {\r | |
192 | EFI_STATUS Status;\r | |
193 | UINT64 FatEntryPos;\r | |
194 | UINT32 Dummy;\r | |
195 | \r | |
196 | *NextCluster = 0;\r | |
197 | \r | |
198 | if (Volume->FatType == Fat32) {\r | |
199 | FatEntryPos = Volume->FatPos + MultU64x32 (4, Cluster);\r | |
200 | \r | |
201 | Status = FatReadDisk (PrivateData, Volume->BlockDeviceNo, FatEntryPos, 4, NextCluster);\r | |
202 | *NextCluster &= 0x0fffffff;\r | |
203 | \r | |
204 | //\r | |
205 | // Pad high bits for our FAT_CLUSTER_... macro definitions to work\r | |
206 | //\r | |
207 | if ((*NextCluster) >= 0x0ffffff7) {\r | |
208 | *NextCluster |= (-1 &~0xf);\r | |
209 | }\r | |
210 | \r | |
211 | } else if (Volume->FatType == Fat16) {\r | |
212 | FatEntryPos = Volume->FatPos + MultU64x32 (2, Cluster);\r | |
213 | \r | |
214 | Status = FatReadDisk (PrivateData, Volume->BlockDeviceNo, FatEntryPos, 2, NextCluster);\r | |
215 | \r | |
216 | //\r | |
217 | // Pad high bits for our FAT_CLUSTER_... macro definitions to work\r | |
218 | //\r | |
219 | if ((*NextCluster) >= 0xfff7) {\r | |
220 | *NextCluster |= (-1 &~0xf);\r | |
221 | }\r | |
222 | \r | |
223 | } else {\r | |
224 | FatEntryPos = Volume->FatPos + DivU64x32Remainder (MultU64x32 (3, Cluster), 2, &Dummy);\r | |
225 | \r | |
226 | Status = FatReadDisk (PrivateData, Volume->BlockDeviceNo, FatEntryPos, 2, NextCluster);\r | |
227 | \r | |
228 | if ((Cluster & 0x01) != 0) {\r | |
229 | *NextCluster = (*NextCluster) >> 4;\r | |
230 | } else {\r | |
231 | *NextCluster = (*NextCluster) & 0x0fff;\r | |
232 | }\r | |
233 | //\r | |
234 | // Pad high bits for our FAT_CLUSTER_... macro definitions to work\r | |
235 | //\r | |
236 | if ((*NextCluster) >= 0x0ff7) {\r | |
237 | *NextCluster |= (-1 &~0xf);\r | |
238 | }\r | |
239 | }\r | |
240 | \r | |
241 | if (EFI_ERROR (Status)) {\r | |
242 | return EFI_DEVICE_ERROR;\r | |
243 | }\r | |
244 | \r | |
245 | return EFI_SUCCESS;\r | |
246 | \r | |
247 | }\r | |
248 | \r | |
249 | \r | |
250 | /**\r | |
251 | Set a file's CurrentPos and CurrentCluster, then compute StraightReadAmount.\r | |
252 | \r | |
e38f26a2 LG |
253 | @param PrivateData the global memory map\r |
254 | @param File the file\r | |
255 | @param Pos the Position which is offset from the file's\r | |
256 | CurrentPos\r | |
2f4dfa84 | 257 | \r |
e38f26a2 LG |
258 | @retval EFI_SUCCESS Success.\r |
259 | @retval EFI_INVALID_PARAMETER Pos is beyond file's size.\r | |
2f4dfa84 JJ |
260 | @retval EFI_DEVICE_ERROR Something error while accessing media.\r |
261 | \r | |
262 | **/\r | |
263 | EFI_STATUS\r | |
264 | FatSetFilePos (\r | |
265 | IN PEI_FAT_PRIVATE_DATA *PrivateData,\r | |
266 | IN PEI_FAT_FILE *File,\r | |
267 | IN UINT32 Pos\r | |
268 | )\r | |
269 | {\r | |
270 | EFI_STATUS Status;\r | |
271 | UINT32 AlignedPos;\r | |
272 | UINT32 Offset;\r | |
273 | UINT32 Cluster;\r | |
274 | UINT32 PrevCluster;\r | |
275 | \r | |
276 | if (File->IsFixedRootDir) {\r | |
277 | \r | |
278 | if (Pos >= MultU64x32 (File->Volume->RootEntries, 32) - File->CurrentPos) {\r | |
279 | return EFI_INVALID_PARAMETER;\r | |
280 | }\r | |
281 | \r | |
282 | File->CurrentPos += Pos;\r | |
283 | File->StraightReadAmount = (UINT32) (MultU64x32 (File->Volume->RootEntries, 32) - File->CurrentPos);\r | |
284 | \r | |
285 | } else {\r | |
286 | \r | |
287 | DivU64x32Remainder (File->CurrentPos, File->Volume->ClusterSize, &Offset);\r | |
288 | AlignedPos = (UINT32) File->CurrentPos - (UINT32) Offset;\r | |
289 | \r | |
290 | while\r | |
291 | (\r | |
292 | !FAT_CLUSTER_FUNCTIONAL (File->CurrentCluster) &&\r | |
293 | AlignedPos + File->Volume->ClusterSize <= File->CurrentPos + Pos\r | |
294 | ) {\r | |
295 | AlignedPos += File->Volume->ClusterSize;\r | |
296 | Status = FatGetNextCluster (\r | |
297 | PrivateData,\r | |
298 | File->Volume,\r | |
299 | File->CurrentCluster,\r | |
300 | &File->CurrentCluster\r | |
301 | );\r | |
302 | if (EFI_ERROR (Status)) {\r | |
303 | return EFI_DEVICE_ERROR;\r | |
304 | }\r | |
305 | }\r | |
306 | \r | |
307 | if (FAT_CLUSTER_FUNCTIONAL (File->CurrentCluster)) {\r | |
308 | return EFI_INVALID_PARAMETER;\r | |
309 | }\r | |
310 | \r | |
311 | File->CurrentPos += Pos;\r | |
1d951a30 FT |
312 | //\r |
313 | // Calculate the amount of consecutive cluster occupied by the file.\r | |
314 | // FatReadFile() will use it to read these blocks once.\r | |
315 | //\r | |
2f4dfa84 JJ |
316 | File->StraightReadAmount = 0;\r |
317 | Cluster = File->CurrentCluster;\r | |
318 | while (!FAT_CLUSTER_FUNCTIONAL (Cluster)) {\r | |
319 | File->StraightReadAmount += File->Volume->ClusterSize;\r | |
320 | PrevCluster = Cluster;\r | |
321 | Status = FatGetNextCluster (PrivateData, File->Volume, Cluster, &Cluster);\r | |
322 | if (EFI_ERROR (Status)) {\r | |
323 | return EFI_DEVICE_ERROR;\r | |
324 | }\r | |
325 | \r | |
326 | if (Cluster != PrevCluster + 1) {\r | |
327 | break;\r | |
328 | }\r | |
329 | }\r | |
330 | \r | |
331 | DivU64x32Remainder (File->CurrentPos, File->Volume->ClusterSize, &Offset);\r | |
332 | File->StraightReadAmount -= (UINT32) Offset;\r | |
333 | \r | |
334 | }\r | |
335 | \r | |
336 | return EFI_SUCCESS;\r | |
337 | }\r | |
338 | \r | |
339 | \r | |
340 | /**\r | |
341 | Reads file data. Updates the file's CurrentPos.\r | |
342 | \r | |
e38f26a2 LG |
343 | @param PrivateData Global memory map for accessing global variables\r |
344 | @param File The file.\r | |
345 | @param Size The amount of data to read.\r | |
346 | @param Buffer The buffer storing the data.\r | |
2f4dfa84 | 347 | \r |
e38f26a2 LG |
348 | @retval EFI_SUCCESS The data is read.\r |
349 | @retval EFI_INVALID_PARAMETER File is invalid.\r | |
2f4dfa84 JJ |
350 | @retval EFI_DEVICE_ERROR Something error while accessing media.\r |
351 | \r | |
352 | **/\r | |
353 | EFI_STATUS\r | |
354 | FatReadFile (\r | |
355 | IN PEI_FAT_PRIVATE_DATA *PrivateData,\r | |
356 | IN PEI_FAT_FILE *File,\r | |
357 | IN UINTN Size,\r | |
358 | OUT VOID *Buffer\r | |
359 | )\r | |
360 | {\r | |
361 | EFI_STATUS Status;\r | |
362 | CHAR8 *BufferPtr;\r | |
363 | UINT32 Offset;\r | |
364 | UINT64 PhysicalAddr;\r | |
365 | UINTN Amount;\r | |
366 | \r | |
367 | BufferPtr = Buffer;\r | |
368 | \r | |
369 | if (File->IsFixedRootDir) {\r | |
370 | //\r | |
371 | // This is the fixed root dir in FAT12 and FAT16\r | |
372 | //\r | |
373 | if (File->CurrentPos + Size > File->Volume->RootEntries * sizeof (FAT_DIRECTORY_ENTRY)) {\r | |
374 | return EFI_INVALID_PARAMETER;\r | |
375 | }\r | |
376 | \r | |
377 | Status = FatReadDisk (\r | |
378 | PrivateData,\r | |
379 | File->Volume->BlockDeviceNo,\r | |
380 | File->Volume->RootDirPos + File->CurrentPos,\r | |
381 | Size,\r | |
382 | Buffer\r | |
383 | );\r | |
384 | File->CurrentPos += (UINT32) Size;\r | |
385 | return Status;\r | |
386 | \r | |
387 | } else {\r | |
388 | \r | |
389 | if ((File->Attributes & FAT_ATTR_DIRECTORY) == 0) {\r | |
64b25f5d | 390 | Size = Size < (File->FileSize - File->CurrentPos) ? Size : (File->FileSize - File->CurrentPos);\r |
2f4dfa84 JJ |
391 | }\r |
392 | //\r | |
393 | // This is a normal cluster based file\r | |
394 | //\r | |
395 | while (Size != 0) {\r | |
396 | DivU64x32Remainder (File->CurrentPos, File->Volume->ClusterSize, &Offset);\r | |
397 | PhysicalAddr = File->Volume->FirstClusterPos + MultU64x32 (File->Volume->ClusterSize, File->CurrentCluster - 2);\r | |
398 | \r | |
399 | Amount = File->StraightReadAmount;\r | |
400 | Amount = Size > Amount ? Amount : Size;\r | |
401 | Status = FatReadDisk (\r | |
402 | PrivateData,\r | |
403 | File->Volume->BlockDeviceNo,\r | |
404 | PhysicalAddr + Offset,\r | |
405 | Amount,\r | |
406 | BufferPtr\r | |
407 | );\r | |
408 | if (EFI_ERROR (Status)) {\r | |
409 | return EFI_DEVICE_ERROR;\r | |
410 | }\r | |
411 | //\r | |
412 | // Advance the file's current pos and current cluster\r | |
413 | //\r | |
414 | FatSetFilePos (PrivateData, File, (UINT32) Amount);\r | |
415 | \r | |
416 | BufferPtr += Amount;\r | |
417 | Size -= Amount;\r | |
418 | }\r | |
419 | \r | |
420 | return EFI_SUCCESS;\r | |
421 | }\r | |
422 | }\r | |
423 | \r | |
424 | \r | |
425 | /**\r | |
426 | This function reads the next item in the parent directory and\r | |
427 | initializes the output parameter SubFile (CurrentPos is initialized to 0).\r | |
428 | The function updates the CurrentPos of the parent dir to after the item read.\r | |
429 | If no more items were found, the function returns EFI_NOT_FOUND.\r | |
430 | \r | |
e38f26a2 LG |
431 | @param PrivateData Global memory map for accessing global variables\r |
432 | @param ParentDir The parent directory.\r | |
433 | @param SubFile The File structure containing the sub file that\r | |
434 | is caught.\r | |
2f4dfa84 | 435 | \r |
e38f26a2 LG |
436 | @retval EFI_SUCCESS The next sub file is obtained.\r |
437 | @retval EFI_INVALID_PARAMETER The ParentDir is not a directory.\r | |
438 | @retval EFI_NOT_FOUND No more sub file exists.\r | |
2f4dfa84 JJ |
439 | @retval EFI_DEVICE_ERROR Something error while accessing media.\r |
440 | \r | |
441 | **/\r | |
442 | EFI_STATUS\r | |
443 | FatReadNextDirectoryEntry (\r | |
444 | IN PEI_FAT_PRIVATE_DATA *PrivateData,\r | |
445 | IN PEI_FAT_FILE *ParentDir,\r | |
446 | OUT PEI_FAT_FILE *SubFile\r | |
447 | )\r | |
448 | {\r | |
449 | EFI_STATUS Status;\r | |
450 | FAT_DIRECTORY_ENTRY DirEntry;\r | |
451 | CHAR16 *Pos;\r | |
452 | CHAR16 BaseName[9];\r | |
453 | CHAR16 Ext[4];\r | |
454 | \r | |
455 | ZeroMem ((UINT8 *) SubFile, sizeof (PEI_FAT_FILE));\r | |
456 | \r | |
457 | //\r | |
458 | // Pick a valid directory entry\r | |
459 | //\r | |
460 | while (1) {\r | |
461 | //\r | |
462 | // Read one entry\r | |
463 | //\r | |
464 | Status = FatReadFile (PrivateData, ParentDir, 32, &DirEntry);\r | |
465 | if (EFI_ERROR (Status)) {\r | |
466 | return EFI_DEVICE_ERROR;\r | |
467 | }\r | |
468 | //\r | |
469 | // We only search for *FILE* in root directory\r | |
470 | // Long file name entry is *NOT* supported\r | |
471 | //\r | |
3ba5368d | 472 | if (((DirEntry.Attributes & FAT_ATTR_DIRECTORY) == FAT_ATTR_DIRECTORY) || (DirEntry.Attributes == FAT_ATTR_LFN)) {\r |
2f4dfa84 JJ |
473 | continue;\r |
474 | }\r | |
475 | //\r | |
476 | // if this is a terminator dir entry, just return EFI_NOT_FOUND\r | |
477 | //\r | |
478 | if (DirEntry.FileName[0] == EMPTY_ENTRY_MARK) {\r | |
479 | return EFI_NOT_FOUND;\r | |
480 | }\r | |
481 | //\r | |
482 | // If this not an invalid entry neither an empty entry, this is what we want.\r | |
483 | // otherwise we will start a new loop to continue to find something meaningful\r | |
484 | //\r | |
485 | if ((UINT8) DirEntry.FileName[0] != DELETE_ENTRY_MARK) {\r | |
486 | break;\r | |
487 | }\r | |
488 | }\r | |
489 | //\r | |
490 | // fill in the output parameter\r | |
491 | //\r | |
492 | EngFatToStr (8, DirEntry.FileName, BaseName);\r | |
493 | EngFatToStr (3, DirEntry.FileName + 8, Ext);\r | |
494 | \r | |
495 | Pos = (UINT16 *) SubFile->FileName;\r | |
496 | SetMem ((UINT8 *) Pos, FAT_MAX_FILE_NAME_LENGTH, 0);\r | |
497 | CopyMem ((UINT8 *) Pos, (UINT8 *) BaseName, 2 * (StrLen (BaseName) + 1));\r | |
498 | \r | |
499 | if (Ext[0] != 0) {\r | |
500 | Pos += StrLen (BaseName);\r | |
501 | *Pos = '.';\r | |
502 | Pos++;\r | |
503 | CopyMem ((UINT8 *) Pos, (UINT8 *) Ext, 2 * (StrLen (Ext) + 1));\r | |
504 | }\r | |
505 | \r | |
506 | SubFile->Attributes = DirEntry.Attributes;\r | |
507 | SubFile->CurrentCluster = DirEntry.FileCluster;\r | |
508 | if (ParentDir->Volume->FatType == Fat32) {\r | |
509 | SubFile->CurrentCluster |= DirEntry.FileClusterHigh << 16;\r | |
510 | }\r | |
511 | \r | |
512 | SubFile->CurrentPos = 0;\r | |
513 | SubFile->FileSize = DirEntry.FileSize;\r | |
514 | SubFile->StartingCluster = SubFile->CurrentCluster;\r | |
515 | SubFile->Volume = ParentDir->Volume;\r | |
516 | \r | |
2f4dfa84 JJ |
517 | //\r |
518 | // in Pei phase, time parameters do not need to be filled for minimum use.\r | |
519 | //\r | |
520 | return Status;\r | |
521 | }\r |