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fd6a62f3 | 1 | /** @file\r |
2 | Utility routines used by boot maintenance modules.\r | |
93e3992d | 3 | \r |
fd6a62f3 | 4 | Copyright (c) 2004 - 2008, Intel Corporation. <BR>\r |
93e3992d | 5 | All rights reserved. This program and the accompanying materials\r |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
fd6a62f3 | 13 | **/\r |
93e3992d | 14 | \r |
15 | #include "BootMaint.h"\r | |
16 | \r | |
b30312ba | 17 | /**\r |
93e3992d | 18 | Wrap original AllocatePool gBS call\r |
19 | and ZeroMem gBS call into a single\r | |
20 | function in order to decrease code length\r | |
21 | \r | |
93e3992d | 22 | \r |
b30312ba | 23 | @param Size The size to allocate\r |
93e3992d | 24 | \r |
b30312ba | 25 | @return Valid pointer to the allocated buffer\r |
26 | @retval Null for failure\r | |
27 | \r | |
28 | **/\r | |
29 | VOID *\r | |
30 | EfiAllocateZeroPool (\r | |
31 | IN UINTN Size\r | |
32 | )\r | |
93e3992d | 33 | {\r |
34 | EFI_STATUS Status;\r | |
35 | VOID *Ptr;\r | |
36 | Status = gBS->AllocatePool (EfiBootServicesData, Size, &Ptr);\r | |
37 | if (EFI_ERROR (Status)) {\r | |
38 | Ptr = NULL;\r | |
39 | return Ptr;\r | |
40 | }\r | |
41 | \r | |
42 | ZeroMem (Ptr, Size);\r | |
43 | return Ptr;\r | |
44 | }\r | |
45 | \r | |
b30312ba | 46 | /**\r |
93e3992d | 47 | \r |
48 | Find the first instance of this Protocol\r | |
49 | in the system and return it's interface\r | |
50 | \r | |
93e3992d | 51 | \r |
b30312ba | 52 | @param ProtocolGuid - Provides the protocol to search for\r |
53 | @param Interface - On return, a pointer to the first interface\r | |
54 | that matches ProtocolGuid\r | |
93e3992d | 55 | \r |
b30312ba | 56 | @retval EFI_SUCCESS A protocol instance matching ProtocolGuid was found\r |
57 | @retval EFI_NOT_FOUND No protocol instances were found that match ProtocolGuid\r | |
93e3992d | 58 | \r |
b30312ba | 59 | **/\r |
60 | EFI_STATUS\r | |
61 | EfiLibLocateProtocol (\r | |
62 | IN EFI_GUID *ProtocolGuid,\r | |
63 | OUT VOID **Interface\r | |
64 | )\r | |
93e3992d | 65 | {\r |
66 | EFI_STATUS Status;\r | |
67 | \r | |
68 | Status = gBS->LocateProtocol (\r | |
69 | ProtocolGuid,\r | |
70 | NULL,\r | |
71 | (VOID **) Interface\r | |
72 | );\r | |
73 | return Status;\r | |
74 | }\r | |
75 | \r | |
b30312ba | 76 | /**\r |
93e3992d | 77 | \r |
78 | Function opens and returns a file handle to the root directory of a volume.\r | |
79 | \r | |
93e3992d | 80 | \r |
b30312ba | 81 | @param DeviceHandle - A handle for a device\r |
93e3992d | 82 | \r |
b30312ba | 83 | @return A valid file handle or NULL is returned\r |
93e3992d | 84 | \r |
b30312ba | 85 | **/\r |
86 | EFI_FILE_HANDLE\r | |
87 | EfiLibOpenRoot (\r | |
88 | IN EFI_HANDLE DeviceHandle\r | |
89 | )\r | |
93e3992d | 90 | {\r |
91 | EFI_STATUS Status;\r | |
92 | EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *Volume;\r | |
93 | EFI_FILE_HANDLE File;\r | |
94 | \r | |
95 | File = NULL;\r | |
96 | \r | |
97 | //\r | |
98 | // File the file system interface to the device\r | |
99 | //\r | |
100 | Status = gBS->HandleProtocol (\r | |
101 | DeviceHandle,\r | |
102 | &gEfiSimpleFileSystemProtocolGuid,\r | |
103 | (VOID *) &Volume\r | |
104 | );\r | |
105 | \r | |
106 | //\r | |
107 | // Open the root directory of the volume\r | |
108 | //\r | |
109 | if (!EFI_ERROR (Status)) {\r | |
110 | Status = Volume->OpenVolume (\r | |
111 | Volume,\r | |
112 | &File\r | |
113 | );\r | |
114 | }\r | |
115 | //\r | |
116 | // Done\r | |
117 | //\r | |
118 | return EFI_ERROR (Status) ? NULL : File;\r | |
119 | }\r | |
120 | \r | |
b30312ba | 121 | /**\r |
122 | \r | |
123 | Helper function called as part of the code needed\r | |
124 | to allocate the proper sized buffer for various\r | |
125 | EFI interfaces.\r | |
126 | \r | |
127 | \r | |
128 | @param Status - Current status\r | |
129 | @param Buffer - Current allocated buffer, or NULL\r | |
130 | @param BufferSize - Current buffer size needed\r | |
131 | \r | |
132 | @retval TRUE if the buffer was reallocated and the caller\r | |
133 | should try the API again.\r | |
134 | \r | |
135 | **/\r | |
93e3992d | 136 | BOOLEAN\r |
137 | EfiGrowBuffer (\r | |
138 | IN OUT EFI_STATUS *Status,\r | |
139 | IN OUT VOID **Buffer,\r | |
140 | IN UINTN BufferSize\r | |
141 | )\r | |
93e3992d | 142 | {\r |
143 | BOOLEAN TryAgain;\r | |
144 | \r | |
145 | //\r | |
146 | // If this is an initial request, buffer will be null with a new buffer size\r | |
147 | //\r | |
a78b08d1 | 148 | if ((*Buffer == NULL) && (BufferSize != 0)) {\r |
93e3992d | 149 | *Status = EFI_BUFFER_TOO_SMALL;\r |
150 | }\r | |
151 | //\r | |
152 | // If the status code is "buffer too small", resize the buffer\r | |
153 | //\r | |
154 | TryAgain = FALSE;\r | |
155 | if (*Status == EFI_BUFFER_TOO_SMALL) {\r | |
156 | \r | |
157 | SafeFreePool (*Buffer);\r | |
158 | \r | |
159 | *Buffer = EfiAllocateZeroPool (BufferSize);\r | |
160 | \r | |
a78b08d1 | 161 | if (*Buffer != NULL) {\r |
93e3992d | 162 | TryAgain = TRUE;\r |
163 | } else {\r | |
164 | *Status = EFI_OUT_OF_RESOURCES;\r | |
165 | }\r | |
166 | }\r | |
167 | //\r | |
168 | // If there's an error, free the buffer\r | |
169 | //\r | |
a78b08d1 | 170 | if (!TryAgain && EFI_ERROR (*Status) && (*Buffer != NULL)) {\r |
93e3992d | 171 | SafeFreePool (*Buffer);\r |
172 | *Buffer = NULL;\r | |
173 | }\r | |
174 | \r | |
175 | return TryAgain;\r | |
176 | }\r | |
177 | \r | |
b30312ba | 178 | /**\r |
93e3992d | 179 | Function returns the value of the specified variable.\r |
180 | \r | |
93e3992d | 181 | \r |
b30312ba | 182 | @param Name - A Null-terminated Unicode string that is\r |
183 | the name of the vendor's variable.\r | |
184 | @param VendorGuid - A unique identifier for the vendor.\r | |
93e3992d | 185 | \r |
b30312ba | 186 | @return The payload of the variable.\r |
93e3992d | 187 | \r |
b30312ba | 188 | **/\r |
189 | VOID *\r | |
190 | EfiLibGetVariable (\r | |
191 | IN CHAR16 *Name,\r | |
192 | IN EFI_GUID *VendorGuid\r | |
193 | )\r | |
93e3992d | 194 | {\r |
195 | UINTN VarSize;\r | |
196 | \r | |
197 | return BdsLibGetVariableAndSize (Name, VendorGuid, &VarSize);\r | |
198 | }\r | |
199 | \r | |
b30312ba | 200 | /**\r |
93e3992d | 201 | Function deletes the variable specified by VarName and VarGuid.\r |
202 | \r | |
93e3992d | 203 | \r |
b30312ba | 204 | @param VarName - A Null-terminated Unicode string that is\r |
205 | the name of the vendor's variable.\r | |
206 | \r | |
207 | @param VendorGuid - A unique identifier for the vendor.\r | |
93e3992d | 208 | \r |
b30312ba | 209 | @retval EFI_SUCCESS The variable was found and removed\r |
210 | @retval EFI_UNSUPPORTED The variable store was inaccessible\r | |
211 | @retval EFI_OUT_OF_RESOURCES The temporary buffer was not available\r | |
212 | @retval EFI_NOT_FOUND The variable was not found\r | |
93e3992d | 213 | \r |
b30312ba | 214 | **/\r |
215 | EFI_STATUS\r | |
216 | EfiLibDeleteVariable (\r | |
217 | IN CHAR16 *VarName,\r | |
218 | IN EFI_GUID *VarGuid\r | |
219 | )\r | |
93e3992d | 220 | {\r |
221 | VOID *VarBuf;\r | |
222 | EFI_STATUS Status;\r | |
223 | \r | |
224 | VarBuf = EfiLibGetVariable (VarName, VarGuid);\r | |
225 | Status = EFI_NOT_FOUND;\r | |
226 | \r | |
a78b08d1 | 227 | if (VarBuf != NULL) {\r |
93e3992d | 228 | //\r |
229 | // Delete variable from Storage\r | |
230 | //\r | |
231 | Status = gRT->SetVariable (VarName, VarGuid, VAR_FLAG, 0, NULL);\r | |
232 | ASSERT (!EFI_ERROR (Status));\r | |
233 | SafeFreePool (VarBuf);\r | |
234 | }\r | |
235 | \r | |
236 | return Status;\r | |
237 | }\r | |
238 | \r | |
b30312ba | 239 | /**\r |
93e3992d | 240 | \r |
241 | Function gets the file system information from an open file descriptor,\r | |
242 | and stores it in a buffer allocated from pool.\r | |
243 | \r | |
93e3992d | 244 | \r |
b30312ba | 245 | @param FHand The file handle.\r |
93e3992d | 246 | \r |
b30312ba | 247 | @return A pointer to a buffer with file information or NULL is returned\r |
93e3992d | 248 | \r |
b30312ba | 249 | **/\r |
250 | EFI_FILE_SYSTEM_VOLUME_LABEL_INFO *\r | |
251 | EfiLibFileSystemVolumeLabelInfo (\r | |
252 | IN EFI_FILE_HANDLE FHand\r | |
253 | )\r | |
93e3992d | 254 | {\r |
255 | EFI_STATUS Status;\r | |
256 | EFI_FILE_SYSTEM_VOLUME_LABEL_INFO *Buffer;\r | |
257 | UINTN BufferSize;\r | |
258 | //\r | |
259 | // Initialize for GrowBuffer loop\r | |
260 | //\r | |
261 | Buffer = NULL;\r | |
262 | BufferSize = SIZE_OF_EFI_FILE_SYSTEM_VOLUME_LABEL_INFO + 200;\r | |
263 | \r | |
264 | //\r | |
265 | // Call the real function\r | |
266 | //\r | |
267 | while (EfiGrowBuffer (&Status, (VOID **) &Buffer, BufferSize)) {\r | |
268 | Status = FHand->GetInfo (\r | |
269 | FHand,\r | |
270 | &gEfiFileSystemVolumeLabelInfoIdGuid,\r | |
271 | &BufferSize,\r | |
272 | Buffer\r | |
273 | );\r | |
274 | }\r | |
275 | \r | |
276 | return Buffer;\r | |
277 | }\r | |
278 | \r | |
b30312ba | 279 | /**\r |
280 | Duplicate a string.\r | |
281 | \r | |
282 | @param Src The source.\r | |
283 | \r | |
284 | @return A new string which is duplicated copy of the source.\r | |
285 | @retval NULL If there is not enought memory.\r | |
286 | \r | |
287 | **/\r | |
93e3992d | 288 | CHAR16 *\r |
289 | EfiStrDuplicate (\r | |
290 | IN CHAR16 *Src\r | |
291 | )\r | |
292 | {\r | |
293 | CHAR16 *Dest;\r | |
294 | UINTN Size;\r | |
295 | \r | |
296 | Size = StrSize (Src);\r | |
297 | Dest = EfiAllocateZeroPool (Size);\r | |
298 | ASSERT (Dest != NULL);\r | |
a78b08d1 | 299 | if (Dest != NULL) {\r |
93e3992d | 300 | CopyMem (Dest, Src, Size);\r |
301 | }\r | |
302 | \r | |
303 | return Dest;\r | |
304 | }\r | |
305 | \r | |
b30312ba | 306 | /**\r |
93e3992d | 307 | \r |
308 | Function gets the file information from an open file descriptor, and stores it\r | |
309 | in a buffer allocated from pool.\r | |
310 | \r | |
b30312ba | 311 | @param FHand File Handle.\r |
93e3992d | 312 | \r |
b30312ba | 313 | @return A pointer to a buffer with file information or NULL is returned\r |
93e3992d | 314 | \r |
b30312ba | 315 | **/\r |
316 | EFI_FILE_INFO *\r | |
317 | EfiLibFileInfo (\r | |
318 | IN EFI_FILE_HANDLE FHand\r | |
319 | )\r | |
93e3992d | 320 | {\r |
321 | EFI_STATUS Status;\r | |
322 | EFI_FILE_INFO *Buffer;\r | |
323 | UINTN BufferSize;\r | |
324 | \r | |
325 | //\r | |
326 | // Initialize for GrowBuffer loop\r | |
327 | //\r | |
328 | Buffer = NULL;\r | |
329 | BufferSize = SIZE_OF_EFI_FILE_INFO + 200;\r | |
330 | \r | |
331 | //\r | |
332 | // Call the real function\r | |
333 | //\r | |
334 | while (EfiGrowBuffer (&Status, (VOID **) &Buffer, BufferSize)) {\r | |
335 | Status = FHand->GetInfo (\r | |
336 | FHand,\r | |
337 | &gEfiFileInfoGuid,\r | |
338 | &BufferSize,\r | |
339 | Buffer\r | |
340 | );\r | |
341 | }\r | |
342 | \r | |
343 | return Buffer;\r | |
344 | }\r | |
345 | \r | |
b30312ba | 346 | /**\r |
93e3992d | 347 | Function is used to determine the number of device path instances\r |
348 | that exist in a device path.\r | |
349 | \r | |
93e3992d | 350 | \r |
b30312ba | 351 | @param DevicePath - A pointer to a device path data structure.\r |
93e3992d | 352 | \r |
b30312ba | 353 | @return This function counts and returns the number of device path instances\r |
354 | in DevicePath.\r | |
93e3992d | 355 | \r |
b30312ba | 356 | **/\r |
357 | UINTN\r | |
358 | EfiDevicePathInstanceCount (\r | |
359 | IN EFI_DEVICE_PATH_PROTOCOL *DevicePath\r | |
360 | )\r | |
93e3992d | 361 | {\r |
362 | UINTN Count;\r | |
363 | UINTN Size;\r | |
364 | \r | |
365 | Count = 0;\r | |
366 | while (GetNextDevicePathInstance (&DevicePath, &Size)) {\r | |
367 | Count += 1;\r | |
368 | }\r | |
369 | \r | |
370 | return Count;\r | |
371 | }\r | |
372 | \r | |
b30312ba | 373 | /**\r |
374 | Adjusts the size of a previously allocated buffer.\r | |
375 | \r | |
376 | \r | |
377 | @param OldPool - A pointer to the buffer whose size is being adjusted.\r | |
378 | @param OldSize - The size of the current buffer.\r | |
379 | @param NewSize - The size of the new buffer.\r | |
380 | \r | |
381 | @retval EFI_SUCEESS The requested number of bytes were allocated.\r | |
382 | @retval EFI_OUT_OF_RESOURCES The pool requested could not be allocated.\r | |
383 | @retval EFI_INVALID_PARAMETER The buffer was invalid.\r | |
384 | \r | |
385 | **/\r | |
93e3992d | 386 | VOID *\r |
387 | EfiReallocatePool (\r | |
388 | IN VOID *OldPool,\r | |
389 | IN UINTN OldSize,\r | |
390 | IN UINTN NewSize\r | |
391 | )\r | |
93e3992d | 392 | {\r |
393 | VOID *NewPool;\r | |
394 | \r | |
395 | NewPool = NULL;\r | |
a78b08d1 | 396 | if (NewSize != 0) {\r |
93e3992d | 397 | NewPool = EfiAllocateZeroPool (NewSize);\r |
398 | }\r | |
399 | \r | |
a78b08d1 | 400 | if (OldPool != NULL) {\r |
401 | if (NewPool != NULL) {\r | |
93e3992d | 402 | CopyMem (NewPool, OldPool, OldSize < NewSize ? OldSize : NewSize);\r |
403 | }\r | |
404 | \r | |
405 | SafeFreePool (OldPool);\r | |
406 | }\r | |
407 | \r | |
408 | return NewPool;\r | |
409 | }\r | |
410 | \r | |
b30312ba | 411 | /**\r |
93e3992d | 412 | Compare two EFI_TIME data.\r |
413 | \r | |
93e3992d | 414 | \r |
b30312ba | 415 | @param FirstTime - A pointer to the first EFI_TIME data.\r |
416 | @param SecondTime - A pointer to the second EFI_TIME data.\r | |
93e3992d | 417 | \r |
b30312ba | 418 | @retval TRUE The FirstTime is not later than the SecondTime.\r |
419 | @retval FALSE The FirstTime is later than the SecondTime.\r | |
93e3992d | 420 | \r |
b30312ba | 421 | **/\r |
422 | BOOLEAN\r | |
423 | TimeCompare (\r | |
424 | IN EFI_TIME *FirstTime,\r | |
425 | IN EFI_TIME *SecondTime\r | |
426 | )\r | |
93e3992d | 427 | {\r |
428 | if (FirstTime->Year != SecondTime->Year) {\r | |
429 | return (BOOLEAN) (FirstTime->Year < SecondTime->Year);\r | |
430 | } else if (FirstTime->Month != SecondTime->Month) {\r | |
431 | return (BOOLEAN) (FirstTime->Month < SecondTime->Month);\r | |
432 | } else if (FirstTime->Day != SecondTime->Day) {\r | |
433 | return (BOOLEAN) (FirstTime->Day < SecondTime->Day);\r | |
434 | } else if (FirstTime->Hour != SecondTime->Hour) {\r | |
435 | return (BOOLEAN) (FirstTime->Hour < SecondTime->Hour);\r | |
436 | } else if (FirstTime->Minute != SecondTime->Minute) {\r | |
437 | return (BOOLEAN) (FirstTime->Minute < FirstTime->Minute);\r | |
438 | } else if (FirstTime->Second != SecondTime->Second) {\r | |
439 | return (BOOLEAN) (FirstTime->Second < SecondTime->Second);\r | |
440 | }\r | |
441 | \r | |
442 | return (BOOLEAN) (FirstTime->Nanosecond <= SecondTime->Nanosecond);\r | |
443 | }\r | |
444 | \r | |
b30312ba | 445 | /**\r |
446 | Get a string from the Data Hub record based on \r | |
447 | a device path.\r | |
448 | \r | |
449 | @param DevPath The device Path.\r | |
450 | \r | |
451 | @return A string located from the Data Hub records based on\r | |
452 | the device path.\r | |
453 | \r | |
454 | **/\r | |
93e3992d | 455 | UINT16 *\r |
456 | EfiLibStrFromDatahub (\r | |
457 | IN EFI_DEVICE_PATH_PROTOCOL *DevPath\r | |
458 | )\r | |
459 | {\r | |
460 | EFI_STATUS Status;\r | |
461 | UINT16 *Desc;\r | |
462 | EFI_DATA_HUB_PROTOCOL *Datahub;\r | |
463 | UINT64 Count;\r | |
464 | EFI_DATA_RECORD_HEADER *Record;\r | |
465 | EFI_SUBCLASS_TYPE1_HEADER *DataHdr;\r | |
466 | EFI_GUID MiscGuid = EFI_MISC_SUBCLASS_GUID;\r | |
467 | EFI_MISC_ONBOARD_DEVICE_DATA *ob;\r | |
468 | EFI_MISC_PORT_INTERNAL_CONNECTOR_DESIGNATOR_DATA *Port;\r | |
469 | EFI_TIME CurTime;\r | |
470 | \r | |
471 | Status = gBS->LocateProtocol (\r | |
472 | &gEfiDataHubProtocolGuid,\r | |
473 | NULL,\r | |
474 | (VOID **) &Datahub\r | |
475 | );\r | |
476 | if (EFI_ERROR (Status)) {\r | |
477 | return NULL;\r | |
478 | }\r | |
479 | \r | |
480 | Status = gRT->GetTime (&CurTime, NULL);\r | |
481 | if (EFI_ERROR (Status)) {\r | |
482 | return NULL;\r | |
483 | }\r | |
484 | \r | |
485 | Count = 0;\r | |
486 | do {\r | |
487 | Status = Datahub->GetNextRecord (Datahub, &Count, NULL, &Record);\r | |
488 | \r | |
489 | if (EFI_ERROR (Status)) {\r | |
490 | break;\r | |
491 | }\r | |
492 | \r | |
493 | if (Record->DataRecordClass == EFI_DATA_RECORD_CLASS_DATA && CompareGuid (&Record->DataRecordGuid, &MiscGuid)) {\r | |
494 | //\r | |
495 | // This record is what we need\r | |
496 | //\r | |
497 | DataHdr = (EFI_SUBCLASS_TYPE1_HEADER *) (Record + 1);\r | |
498 | if (EFI_MISC_ONBOARD_DEVICE_RECORD_NUMBER == DataHdr->RecordType) {\r | |
499 | ob = (EFI_MISC_ONBOARD_DEVICE_DATA *) (DataHdr + 1);\r | |
500 | if (BdsLibMatchDevicePaths ((EFI_DEVICE_PATH_PROTOCOL *) &ob->OnBoardDevicePath, DevPath)) {\r | |
501 | GetProducerString (&Record->ProducerName, ob->OnBoardDeviceDescription, &Desc);\r | |
502 | return Desc;\r | |
503 | }\r | |
504 | }\r | |
505 | \r | |
506 | if (EFI_MISC_PORT_INTERNAL_CONNECTOR_DESIGNATOR_RECORD_NUMBER == DataHdr->RecordType) {\r | |
507 | Port = (EFI_MISC_PORT_INTERNAL_CONNECTOR_DESIGNATOR_DATA *) (DataHdr + 1);\r | |
508 | if (BdsLibMatchDevicePaths ((EFI_DEVICE_PATH_PROTOCOL *) &Port->PortPath, DevPath)) {\r | |
509 | GetProducerString (&Record->ProducerName, Port->PortExternalConnectorDesignator, &Desc);\r | |
510 | return Desc;\r | |
511 | }\r | |
512 | }\r | |
513 | }\r | |
514 | \r | |
515 | } while (TimeCompare (&Record->LogTime, &CurTime) && Count != 0);\r | |
516 | \r | |
517 | return NULL;\r | |
518 | }\r |