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1 | /*++\r | |
2 | \r | |
3 | Copyright (c) 2006, Intel Corporation \r | |
4 | All rights reserved. This program and the accompanying materials \r | |
5 | are licensed and made available under the terms and conditions of the BSD License \r | |
6 | which accompanies this distribution. The full text of the license may be found at \r | |
7 | http://opensource.org/licenses/bsd-license.php \r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
11 | \r | |
12 | Module Name:\r | |
13 | \r | |
14 | FwVolBlock.c\r | |
15 | \r | |
16 | Abstract:\r | |
17 | \r | |
18 | Firmware Volume Block protocol.. Consumes FV hobs and creates\r | |
19 | appropriate block protocols.\r | |
20 | \r | |
21 | Also consumes NT_NON_MM_FV envinronment variable and produces appropriate\r | |
22 | block protocols fro them also... (this is TBD)\r | |
23 | \r | |
24 | --*/\r | |
25 | \r | |
26 | #include <DxeMain.h>\r | |
27 | \r | |
28 | \r | |
29 | EFI_FW_VOL_BLOCK_DEVICE mFwVolBlock = {\r | |
30 | FVB_DEVICE_SIGNATURE,\r | |
31 | NULL,\r | |
32 | {\r | |
33 | {\r | |
34 | {\r | |
35 | HARDWARE_DEVICE_PATH,\r | |
36 | HW_MEMMAP_DP,\r | |
37 | { (UINT8)(sizeof (MEMMAP_DEVICE_PATH)), (UINT8)(sizeof (MEMMAP_DEVICE_PATH) >> 8) }\r | |
38 | },\r | |
39 | EfiMemoryMappedIO,\r | |
40 | (EFI_PHYSICAL_ADDRESS)0,\r | |
41 | (EFI_PHYSICAL_ADDRESS)0,\r | |
42 | },\r | |
43 | {\r | |
44 | END_DEVICE_PATH_TYPE,\r | |
45 | END_ENTIRE_DEVICE_PATH_SUBTYPE,\r | |
46 | { END_DEVICE_PATH_LENGTH, 0 } \r | |
47 | },\r | |
48 | },\r | |
49 | {\r | |
50 | FwVolBlockGetAttributes,\r | |
51 | (EFI_FVB_SET_ATTRIBUTES)FwVolBlockSetAttributes,\r | |
52 | FwVolBlockGetPhysicalAddress,\r | |
53 | FwVolBlockGetBlockSize,\r | |
54 | FwVolBlockReadBlock,\r | |
55 | (EFI_FVB_WRITE)FwVolBlockWriteBlock,\r | |
56 | (EFI_FVB_ERASE_BLOCKS)FwVolBlockEraseBlock,\r | |
57 | NULL \r | |
58 | },\r | |
59 | 0,\r | |
60 | NULL,\r | |
61 | 0,\r | |
62 | 0\r | |
63 | };\r | |
64 | \r | |
65 | \r | |
66 | \r | |
67 | \r | |
68 | EFI_STATUS\r | |
69 | EFIAPI\r | |
70 | FwVolBlockGetAttributes (\r | |
71 | IN CONST EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *This,\r | |
72 | OUT EFI_FVB_ATTRIBUTES *Attributes\r | |
73 | )\r | |
74 | /*++\r | |
75 | \r | |
76 | Routine Description:\r | |
77 | Retrieves Volume attributes. No polarity translations are done.\r | |
78 | \r | |
79 | Arguments:\r | |
80 | This - Calling context\r | |
81 | Attributes - output buffer which contains attributes\r | |
82 | \r | |
83 | Returns:\r | |
84 | EFI_SUCCESS - The firmware volume attributes were returned.\r | |
85 | \r | |
86 | --*/\r | |
87 | {\r | |
88 | EFI_FW_VOL_BLOCK_DEVICE *FvbDevice;\r | |
89 | \r | |
90 | FvbDevice = FVB_DEVICE_FROM_THIS (This);\r | |
91 | \r | |
92 | //\r | |
93 | // Since we are read only, it's safe to get attributes data from our in-memory copy.\r | |
94 | //\r | |
95 | *Attributes = FvbDevice->FvbAttributes;\r | |
96 | \r | |
97 | return EFI_SUCCESS;\r | |
98 | }\r | |
99 | \r | |
100 | \r | |
101 | EFI_STATUS\r | |
102 | EFIAPI\r | |
103 | FwVolBlockSetAttributes (\r | |
104 | IN CONST EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *This,\r | |
105 | IN CONST EFI_FVB_ATTRIBUTES *Attributes\r | |
106 | )\r | |
107 | /*++\r | |
108 | \r | |
109 | Routine Description:\r | |
110 | Modifies the current settings of the firmware volume according to the input parameter.\r | |
111 | \r | |
112 | Arguments:\r | |
113 | This - Calling context\r | |
114 | Attributes - input buffer which contains attributes\r | |
115 | \r | |
116 | Returns:\r | |
117 | EFI_SUCCESS - The firmware volume attributes were returned.\r | |
118 | EFI_INVALID_PARAMETER - The attributes requested are in conflict with the capabilities as\r | |
119 | declared in the firmware volume header.\r | |
120 | EFI_UNSUPPORTED - Not supported.\r | |
121 | --*/\r | |
122 | {\r | |
123 | return EFI_UNSUPPORTED;\r | |
124 | }\r | |
125 | \r | |
126 | \r | |
127 | EFI_STATUS\r | |
128 | EFIAPI\r | |
129 | FwVolBlockEraseBlock (\r | |
130 | IN EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *This,\r | |
131 | ...\r | |
132 | )\r | |
133 | /*++\r | |
134 | \r | |
135 | Routine Description:\r | |
136 | The EraseBlock() function erases one or more blocks as denoted by the \r | |
137 | variable argument list. The entire parameter list of blocks must be verified\r | |
138 | prior to erasing any blocks. If a block is requested that does not exist \r | |
139 | within the associated firmware volume (it has a larger index than the last \r | |
140 | block of the firmware volume), the EraseBlock() function must return\r | |
141 | EFI_INVALID_PARAMETER without modifying the contents of the firmware volume.\r | |
142 | \r | |
143 | Arguments:\r | |
144 | This - Calling context\r | |
145 | ... - Starting LBA followed by Number of Lba to erase. a -1 to terminate\r | |
146 | the list.\r | |
147 | \r | |
148 | Returns:\r | |
149 | EFI_SUCCESS - The erase request was successfully completed.\r | |
150 | EFI_ACCESS_DENIED - The firmware volume is in the WriteDisabled state.\r | |
151 | EFI_DEVICE_ERROR - The block device is not functioning correctly and could not be\r | |
152 | written. The firmware device may have been partially erased.\r | |
153 | EFI_INVALID_PARAMETER - One or more of the LBAs listed in the variable argument list do\r | |
154 | EFI_UNSUPPORTED - Not supported.\r | |
155 | \r | |
156 | --*/\r | |
157 | {\r | |
158 | return EFI_UNSUPPORTED;\r | |
159 | }\r | |
160 | \r | |
161 | \r | |
162 | EFI_STATUS\r | |
163 | EFIAPI\r | |
164 | FwVolBlockReadBlock (\r | |
165 | IN CONST EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *This,\r | |
166 | IN CONST EFI_LBA Lba,\r | |
167 | IN CONST UINTN Offset,\r | |
168 | IN OUT UINTN *NumBytes,\r | |
169 | IN OUT UINT8 *Buffer\r | |
170 | )\r | |
171 | /*++\r | |
172 | \r | |
173 | Routine Description:\r | |
174 | Read the specified number of bytes from the block to the input buffer.\r | |
175 | \r | |
176 | Arguments:\r | |
177 | This - Indicates the calling context.\r | |
178 | Lba - The starting logical block index to read.\r | |
179 | Offset - Offset into the block at which to begin reading.\r | |
180 | NumBytes - Pointer to a UINT32. At entry, *NumBytes contains the\r | |
181 | total size of the buffer. At exit, *NumBytes contains the\r | |
182 | total number of bytes actually read.\r | |
183 | Buffer - Pinter to a caller-allocated buffer that contains the destine\r | |
184 | for the read. \r | |
185 | \r | |
186 | Returns: \r | |
187 | EFI_SUCCESS - The firmware volume was read successfully.\r | |
188 | EFI_BAD_BUFFER_SIZE - The read was attempted across an LBA boundary.\r | |
189 | EFI_ACCESS_DENIED - Access denied.\r | |
190 | EFI_DEVICE_ERROR - The block device is malfunctioning and could not be read.\r | |
191 | --*/\r | |
192 | {\r | |
193 | EFI_FW_VOL_BLOCK_DEVICE *FvbDevice;\r | |
194 | EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;\r | |
195 | UINT8 *LbaOffset;\r | |
196 | UINTN LbaStart;\r | |
197 | UINTN NumOfBytesRead;\r | |
198 | UINTN LbaIndex;\r | |
199 | \r | |
200 | FvbDevice = FVB_DEVICE_FROM_THIS (This);\r | |
201 | \r | |
202 | //\r | |
203 | // Check if This FW can be read\r | |
204 | //\r | |
205 | if ((FvbDevice->FvbAttributes & EFI_FVB_READ_STATUS) == 0) {\r | |
206 | return EFI_ACCESS_DENIED;\r | |
207 | }\r | |
208 | \r | |
209 | LbaIndex = (UINTN)Lba;\r | |
210 | if (LbaIndex >= FvbDevice->NumBlocks) {\r | |
211 | //\r | |
212 | // Invalid Lba, read nothing.\r | |
213 | //\r | |
214 | *NumBytes = 0;\r | |
215 | return EFI_BAD_BUFFER_SIZE;\r | |
216 | }\r | |
217 | \r | |
218 | if (Offset > FvbDevice->LbaCache[LbaIndex].Length) {\r | |
219 | //\r | |
220 | // all exceed boundry, read nothing.\r | |
221 | //\r | |
222 | *NumBytes = 0;\r | |
223 | return EFI_BAD_BUFFER_SIZE;\r | |
224 | }\r | |
225 | \r | |
226 | NumOfBytesRead = *NumBytes;\r | |
227 | if (Offset + NumOfBytesRead > FvbDevice->LbaCache[LbaIndex].Length) {\r | |
228 | //\r | |
229 | // partial exceed boundry, read data from current postion to end.\r | |
230 | //\r | |
231 | NumOfBytesRead = FvbDevice->LbaCache[LbaIndex].Length - Offset;\r | |
232 | }\r | |
233 | \r | |
234 | LbaStart = FvbDevice->LbaCache[LbaIndex].Base;\r | |
235 | FwVolHeader = (EFI_FIRMWARE_VOLUME_HEADER *)((UINTN)FvbDevice->BaseAddress);\r | |
236 | LbaOffset = (UINT8 *)FwVolHeader + LbaStart + Offset;\r | |
237 | \r | |
238 | //\r | |
239 | // Perform read operation\r | |
240 | //\r | |
241 | CopyMem (Buffer, LbaOffset, NumOfBytesRead);\r | |
242 | \r | |
243 | if (NumOfBytesRead == *NumBytes) {\r | |
244 | return EFI_SUCCESS;\r | |
245 | }\r | |
246 | \r | |
247 | *NumBytes = NumOfBytesRead;\r | |
248 | return EFI_BAD_BUFFER_SIZE;\r | |
249 | }\r | |
250 | \r | |
251 | \r | |
252 | EFI_STATUS\r | |
253 | EFIAPI\r | |
254 | FwVolBlockWriteBlock (\r | |
255 | IN EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *This,\r | |
256 | IN EFI_LBA Lba,\r | |
257 | IN UINTN Offset,\r | |
258 | IN OUT UINTN *NumBytes,\r | |
259 | IN UINT8 *Buffer\r | |
260 | )\r | |
261 | /*++\r | |
262 | \r | |
263 | Routine Description:\r | |
264 | Writes the specified number of bytes from the input buffer to the block.\r | |
265 | \r | |
266 | Arguments:\r | |
267 | This - Indicates the calling context.\r | |
268 | Lba - The starting logical block index to write to.\r | |
269 | Offset - Offset into the block at which to begin writing.\r | |
270 | NumBytes - Pointer to a UINT32. At entry, *NumBytes contains the\r | |
271 | total size of the buffer. At exit, *NumBytes contains the\r | |
272 | total number of bytes actually written.\r | |
273 | Buffer - Pinter to a caller-allocated buffer that contains the source\r | |
274 | for the write. \r | |
275 | \r | |
276 | Returns: \r | |
277 | EFI_SUCCESS - The firmware volume was written successfully.\r | |
278 | EFI_BAD_BUFFER_SIZE - The write was attempted across an LBA boundary. On output,\r | |
279 | NumBytes contains the total number of bytes actually written.\r | |
280 | EFI_ACCESS_DENIED - The firmware volume is in the WriteDisabled state.\r | |
281 | EFI_DEVICE_ERROR - The block device is malfunctioning and could not be written.\r | |
282 | EFI_UNSUPPORTED - Not supported.\r | |
283 | --*/\r | |
284 | {\r | |
285 | return EFI_UNSUPPORTED;\r | |
286 | }\r | |
287 | \r | |
288 | \r | |
289 | EFI_STATUS\r | |
290 | EFIAPI\r | |
291 | FwVolBlockGetPhysicalAddress (\r | |
292 | IN CONST EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *This,\r | |
293 | OUT EFI_PHYSICAL_ADDRESS *Address\r | |
294 | )\r | |
295 | /*++\r | |
296 | \r | |
297 | Routine Description:\r | |
298 | Get Fvb's base address.\r | |
299 | \r | |
300 | Arguments:\r | |
301 | This - Indicates the calling context.\r | |
302 | Address - Fvb device base address.\r | |
303 | \r | |
304 | Returns: \r | |
305 | EFI_SUCCESS - Successfully got Fvb's base address.\r | |
306 | EFI_UNSUPPORTED - Not supported.\r | |
307 | --*/\r | |
308 | {\r | |
309 | EFI_FW_VOL_BLOCK_DEVICE *FvbDevice;\r | |
310 | \r | |
311 | FvbDevice = FVB_DEVICE_FROM_THIS (This);\r | |
312 | \r | |
313 | if (FvbDevice->FvbAttributes & EFI_FVB_MEMORY_MAPPED) {\r | |
314 | *Address = FvbDevice->BaseAddress;\r | |
315 | return EFI_SUCCESS;\r | |
316 | }\r | |
317 | \r | |
318 | return EFI_UNSUPPORTED;\r | |
319 | }\r | |
320 | \r | |
321 | \r | |
322 | EFI_STATUS\r | |
323 | EFIAPI\r | |
324 | FwVolBlockGetBlockSize (\r | |
325 | IN CONST EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *This,\r | |
326 | IN CONST EFI_LBA Lba,\r | |
327 | IN OUT UINTN *BlockSize,\r | |
328 | IN OUT UINTN *NumberOfBlocks\r | |
329 | )\r | |
330 | /*++\r | |
331 | \r | |
332 | Routine Description:\r | |
333 | Retrieves the size in bytes of a specific block within a firmware volume.\r | |
334 | \r | |
335 | Arguments:\r | |
336 | This - Indicates the calling context.\r | |
337 | Lba - Indicates the block for which to return the size.\r | |
338 | BlockSize - Pointer to a caller-allocated UINTN in which the size of the\r | |
339 | block is returned.\r | |
340 | NumberOfBlocks - Pointer to a caller-allocated UINTN in which the number of\r | |
341 | consecutive blocks starting with Lba is returned. All blocks\r | |
342 | in this range have a size of BlockSize. \r | |
343 | Returns:\r | |
344 | EFI_SUCCESS - The firmware volume base address is returned.\r | |
345 | EFI_INVALID_PARAMETER - The requested LBA is out of range.\r | |
346 | --*/\r | |
347 | {\r | |
348 | UINTN TotalBlocks;\r | |
349 | EFI_FW_VOL_BLOCK_DEVICE *FvbDevice;\r | |
350 | EFI_FV_BLOCK_MAP_ENTRY *PtrBlockMapEntry;\r | |
351 | EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;\r | |
352 | \r | |
353 | FvbDevice = FVB_DEVICE_FROM_THIS (This);\r | |
354 | \r | |
355 | //\r | |
356 | // Do parameter checking\r | |
357 | //\r | |
358 | if (Lba >= FvbDevice->NumBlocks) {\r | |
359 | return EFI_INVALID_PARAMETER;\r | |
360 | }\r | |
361 | \r | |
362 | FwVolHeader = (EFI_FIRMWARE_VOLUME_HEADER *)((UINTN)FvbDevice->BaseAddress);\r | |
363 | \r | |
364 | PtrBlockMapEntry = FwVolHeader->BlockMap;\r | |
365 | \r | |
366 | //\r | |
367 | // Search the block map for the given block\r | |
368 | //\r | |
369 | TotalBlocks = 0;\r | |
370 | while ((PtrBlockMapEntry->NumBlocks != 0) || (PtrBlockMapEntry->Length !=0 )) {\r | |
371 | TotalBlocks += PtrBlockMapEntry->NumBlocks;\r | |
372 | if (Lba < TotalBlocks) {\r | |
373 | //\r | |
374 | // We find the range\r | |
375 | //\r | |
376 | break;\r | |
377 | }\r | |
378 | \r | |
379 | PtrBlockMapEntry++;\r | |
380 | }\r | |
381 | \r | |
382 | *BlockSize = PtrBlockMapEntry->Length;\r | |
383 | *NumberOfBlocks = TotalBlocks - (UINTN)Lba;\r | |
384 | \r | |
385 | return EFI_SUCCESS;\r | |
386 | }\r | |
387 | \r | |
388 | \r | |
389 | EFI_STATUS\r | |
390 | ProduceFVBProtocolOnBuffer (\r | |
391 | IN EFI_PHYSICAL_ADDRESS BaseAddress,\r | |
392 | IN UINT64 Length,\r | |
393 | IN EFI_HANDLE ParentHandle,\r | |
394 | OUT EFI_HANDLE *FvProtocol OPTIONAL\r | |
395 | )\r | |
396 | /*++\r | |
397 | \r | |
398 | Routine Description:\r | |
399 | This routine produces a firmware volume block protocol on a given\r | |
400 | buffer. \r | |
401 | \r | |
402 | Arguments:\r | |
403 | BaseAddress - base address of the firmware volume image\r | |
404 | Length - length of the firmware volume image\r | |
405 | ParentHandle - handle of parent firmware volume, if this\r | |
406 | image came from an FV image file in another\r | |
407 | firmware volume (ala capsules)\r | |
408 | FvProtocol - Firmware volume block protocol produced.\r | |
409 | \r | |
410 | Returns:\r | |
411 | EFI_VOLUME_CORRUPTED - Volume corrupted.\r | |
412 | EFI_OUT_OF_RESOURCES - No enough buffer to be allocated.\r | |
413 | EFI_SUCCESS - Successfully produced a FVB protocol on given buffer.\r | |
414 | \r | |
415 | --*/\r | |
416 | {\r | |
417 | EFI_STATUS Status;\r | |
418 | EFI_FW_VOL_BLOCK_DEVICE *FvbDev;\r | |
419 | EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;\r | |
420 | UINTN BlockIndex;\r | |
421 | UINTN BlockIndex2;\r | |
422 | UINTN LinearOffset;\r | |
423 | EFI_FV_BLOCK_MAP_ENTRY *PtrBlockMapEntry;\r | |
424 | \r | |
425 | FwVolHeader = (EFI_FIRMWARE_VOLUME_HEADER *)(UINTN)BaseAddress;\r | |
426 | //\r | |
427 | // Validate FV Header, if not as expected, return\r | |
428 | //\r | |
429 | if (FwVolHeader->Signature != EFI_FVH_SIGNATURE) {\r | |
430 | return EFI_VOLUME_CORRUPTED;\r | |
431 | }\r | |
432 | //\r | |
433 | // Allocate EFI_FW_VOL_BLOCK_DEVICE \r | |
434 | //\r | |
435 | FvbDev = CoreAllocateCopyPool (sizeof (EFI_FW_VOL_BLOCK_DEVICE), &mFwVolBlock);\r | |
436 | if (FvbDev == NULL) {\r | |
437 | return EFI_OUT_OF_RESOURCES;\r | |
438 | }\r | |
439 | \r | |
440 | FvbDev->BaseAddress = BaseAddress;\r | |
441 | FvbDev->FvbAttributes = FwVolHeader->Attributes;\r | |
442 | FvbDev->FwVolBlockInstance.ParentHandle = ParentHandle;\r | |
443 | \r | |
444 | //\r | |
445 | // Init the block caching fields of the device\r | |
446 | // First, count the number of blocks\r | |
447 | //\r | |
448 | FvbDev->NumBlocks = 0;\r | |
449 | for (PtrBlockMapEntry = FwVolHeader->BlockMap;\r | |
450 | PtrBlockMapEntry->NumBlocks != 0;\r | |
451 | PtrBlockMapEntry++) {\r | |
452 | FvbDev->NumBlocks += PtrBlockMapEntry->NumBlocks;\r | |
453 | }\r | |
454 | //\r | |
455 | // Second, allocate the cache\r | |
456 | //\r | |
457 | FvbDev->LbaCache = CoreAllocateBootServicesPool (FvbDev->NumBlocks * sizeof (LBA_CACHE));\r | |
458 | if (FvbDev->LbaCache == NULL) {\r | |
459 | CoreFreePool (FvbDev);\r | |
460 | return EFI_OUT_OF_RESOURCES;\r | |
461 | }\r | |
462 | //\r | |
463 | // Last, fill in the cache with the linear address of the blocks\r | |
464 | //\r | |
465 | BlockIndex = 0;\r | |
466 | LinearOffset = 0;\r | |
467 | for (PtrBlockMapEntry = FwVolHeader->BlockMap;\r | |
468 | PtrBlockMapEntry->NumBlocks != 0; PtrBlockMapEntry++) {\r | |
469 | for (BlockIndex2 = 0; BlockIndex2 < PtrBlockMapEntry->NumBlocks; BlockIndex2++) {\r | |
470 | FvbDev->LbaCache[BlockIndex].Base = LinearOffset;\r | |
471 | FvbDev->LbaCache[BlockIndex].Length = PtrBlockMapEntry->Length;\r | |
472 | LinearOffset += PtrBlockMapEntry->Length;\r | |
473 | BlockIndex++;\r | |
474 | }\r | |
475 | }\r | |
476 | \r | |
477 | //\r | |
478 | // Set up the devicepath\r | |
479 | //\r | |
480 | FvbDev->DevicePath.MemMapDevPath.StartingAddress = BaseAddress;\r | |
481 | FvbDev->DevicePath.MemMapDevPath.EndingAddress = BaseAddress + FwVolHeader->FvLength - 1;\r | |
482 | \r | |
483 | //\r | |
484 | //\r | |
485 | // Attach FvVolBlock Protocol to new handle\r | |
486 | //\r | |
487 | Status = CoreInstallMultipleProtocolInterfaces (\r | |
488 | &FvbDev->Handle,\r | |
489 | &gEfiFirmwareVolumeBlockProtocolGuid, &FvbDev->FwVolBlockInstance,\r | |
490 | &gEfiDevicePathProtocolGuid, &FvbDev->DevicePath,\r | |
491 | &gEfiFirmwareVolumeDispatchProtocolGuid, NULL,\r | |
492 | NULL\r | |
493 | );\r | |
494 | \r | |
495 | //\r | |
496 | // If they want the handle back, set it.\r | |
497 | //\r | |
498 | if (FvProtocol != NULL) {\r | |
499 | *FvProtocol = FvbDev->Handle;\r | |
500 | }\r | |
501 | \r | |
502 | return Status;\r | |
503 | }\r | |
504 | \r | |
505 | \r | |
506 | EFI_STATUS\r | |
507 | EFIAPI\r | |
508 | FwVolBlockDriverInit (\r | |
509 | IN EFI_HANDLE ImageHandle,\r | |
510 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
511 | )\r | |
512 | /*++\r | |
513 | \r | |
514 | Routine Description:\r | |
515 | This routine is the driver initialization entry point. It initializes the\r | |
516 | libraries, consumes FV hobs and NT_NON_MM_FV environment variable and\r | |
517 | produces instances of FW_VOL_BLOCK_PROTOCOL as appropriate.\r | |
518 | Arguments:\r | |
519 | ImageHandle - The image handle.\r | |
520 | SystemTable - The system table.\r | |
521 | Returns:\r | |
522 | EFI_SUCCESS - Successfully initialized firmware volume block driver.\r | |
523 | --*/\r | |
524 | {\r | |
525 | EFI_PEI_HOB_POINTERS FvHob;\r | |
526 | //\r | |
527 | // Core Needs Firmware Volumes to function\r | |
528 | //\r | |
529 | FvHob.Raw = GetHobList ();\r | |
530 | while ((FvHob.Raw = GetNextHob (EFI_HOB_TYPE_FV, FvHob.Raw)) != NULL) {\r | |
531 | //\r | |
532 | // Produce an FVB protocol for it\r | |
533 | //\r | |
534 | ProduceFVBProtocolOnBuffer (FvHob.FirmwareVolume->BaseAddress, FvHob.FirmwareVolume->Length, NULL, NULL); \r | |
535 | FvHob.Raw = GET_NEXT_HOB (FvHob);\r | |
536 | }\r | |
537 | return EFI_SUCCESS;\r | |
538 | }\r | |
539 | \r | |
540 | \r | |
541 | EFI_STATUS\r | |
542 | CoreProcessFirmwareVolume (\r | |
543 | IN VOID *FvHeader,\r | |
544 | IN UINTN Size, \r | |
545 | OUT EFI_HANDLE *FVProtocolHandle\r | |
546 | )\r | |
547 | /*++\r | |
548 | \r | |
549 | Routine Description:\r | |
550 | This DXE service routine is used to process a firmware volume. In\r | |
551 | particular, it can be called by BDS to process a single firmware\r | |
552 | volume found in a capsule. \r | |
553 | \r | |
554 | Arguments:\r | |
555 | FvHeader - pointer to a firmware volume header\r | |
556 | Size - the size of the buffer pointed to by FvHeader\r | |
557 | FVProtocolHandle - the handle on which a firmware volume protocol\r | |
558 | was produced for the firmware volume passed in.\r | |
559 | \r | |
560 | Returns:\r | |
561 | EFI_OUT_OF_RESOURCES - if an FVB could not be produced due to lack of \r | |
562 | system resources\r | |
563 | EFI_VOLUME_CORRUPTED - if the volume was corrupted\r | |
564 | EFI_SUCCESS - a firmware volume protocol was produced for the\r | |
565 | firmware volume\r | |
566 | \r | |
567 | --*/\r | |
568 | {\r | |
569 | VOID *Ptr;\r | |
570 | EFI_STATUS Status;\r | |
571 | \r | |
572 | *FVProtocolHandle = NULL;\r | |
573 | Status = ProduceFVBProtocolOnBuffer ( \r | |
574 | (EFI_PHYSICAL_ADDRESS) (UINTN) FvHeader, \r | |
575 | (UINT64)Size, \r | |
576 | NULL, \r | |
577 | FVProtocolHandle\r | |
578 | );\r | |
579 | //\r | |
580 | // Since in our implementation we use register-protocol-notify to put a\r | |
581 | // FV protocol on the FVB protocol handle, we can't directly verify that\r | |
582 | // the FV protocol was produced. Therefore here we will check the handle\r | |
583 | // and make sure an FV protocol is on it. This indicates that all went \r | |
584 | // well. Otherwise we have to assume that the volume was corrupted \r | |
585 | // somehow.\r | |
586 | //\r | |
587 | if (!EFI_ERROR(Status)) {\r | |
588 | Ptr = NULL;\r | |
589 | Status = CoreHandleProtocol (*FVProtocolHandle, &gEfiFirmwareVolume2ProtocolGuid, (VOID **)&Ptr);\r | |
590 | if (EFI_ERROR(Status) || (Ptr == NULL)) {\r | |
591 | return EFI_VOLUME_CORRUPTED;\r | |
592 | }\r | |
593 | return EFI_SUCCESS;\r | |
594 | }\r | |
595 | return Status;\r | |
596 | }\r | |
597 | \r | |
598 | \r |