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878ddf1f | 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 | IfrVariable.c\r | |
14 | \r | |
15 | Abstract:\r | |
16 | Variable/Map manipulations routines\r | |
17 | \r | |
18 | --*/\r | |
19 | \r | |
20 | VOID\r | |
21 | EfiLibHiiVariablePackGetMap (\r | |
22 | IN EFI_HII_VARIABLE_PACK *Pack, \r | |
23 | OUT CHAR16 **Name, OPTIONAL\r | |
24 | OUT EFI_GUID **Guid, OPTIONAL\r | |
25 | OUT UINT16 *Id, OPTIONAL\r | |
26 | OUT VOID **Var, OPTIONAL\r | |
27 | OUT UINTN *Size OPTIONAL\r | |
28 | )\r | |
29 | /*++\r | |
30 | \r | |
31 | Routine Description:\r | |
32 | \r | |
33 | Extracts a variable form a Pack.\r | |
34 | \r | |
35 | Arguments:\r | |
36 | \r | |
37 | Pack - List of variables\r | |
38 | Name - Name of the variable/map\r | |
39 | Guid - GUID of the variable/map\r | |
40 | Var - Pointer to the variable/map\r | |
41 | Size - Size of the variable/map in bytes\r | |
42 | \r | |
43 | Returns: \r | |
44 | \r | |
45 | VOID\r | |
46 | \r | |
47 | --*/\r | |
48 | {\r | |
49 | if (NULL != Name) {\r | |
50 | *Name = (VOID *) (Pack + 1);\r | |
51 | }\r | |
52 | \r | |
53 | if (NULL != Guid) { \r | |
54 | *Guid = (EFI_GUID *)(UINTN)&Pack->VariableGuid;\r | |
55 | }\r | |
56 | \r | |
57 | \r | |
58 | if (NULL != Id) {\r | |
59 | *Id = Pack->VariableId;\r | |
60 | }\r | |
61 | \r | |
62 | if (NULL != Var) {\r | |
63 | *Var = (VOID *) ((CHAR8 *) (Pack + 1) + Pack->VariableNameLength);\r | |
64 | }\r | |
65 | \r | |
66 | if (NULL != Size) {\r | |
67 | *Size = Pack->Header.Length - sizeof (*Pack) - Pack->VariableNameLength;\r | |
68 | }\r | |
69 | }\r | |
70 | \r | |
71 | \r | |
72 | UINTN\r | |
73 | EfiLibHiiVariablePackListGetMapCnt (\r | |
74 | IN EFI_HII_VARIABLE_PACK_LIST *List\r | |
75 | )\r | |
76 | \r | |
77 | /*++\r | |
78 | \r | |
79 | Routine Description:\r | |
80 | \r | |
81 | Finds a count of the variables/maps in the List.\r | |
82 | \r | |
83 | Arguments:\r | |
84 | \r | |
85 | List - List of variables\r | |
86 | \r | |
87 | Returns: \r | |
88 | \r | |
89 | UINTN - The number of map count.\r | |
90 | \r | |
91 | --*/\r | |
92 | \r | |
93 | {\r | |
94 | UINTN Cnt = 0;\r | |
95 | while (NULL != List) {\r | |
96 | Cnt++;\r | |
97 | List = List->NextVariablePack;\r | |
98 | }\r | |
99 | return Cnt;\r | |
100 | }\r | |
101 | \r | |
102 | \r | |
103 | VOID\r | |
104 | EfiLibHiiVariablePackListForEachVar (\r | |
105 | IN EFI_HII_VARIABLE_PACK_LIST *List,\r | |
106 | IN EFI_LIB_HII_VARIABLE_PACK_LIST_CALLBACK *Callback\r | |
107 | )\r | |
108 | /*++\r | |
109 | \r | |
110 | Routine Description:\r | |
111 | \r | |
112 | Will iterate all variable/maps as appearing \r | |
113 | in List and for each, it will call the Callback.\r | |
114 | \r | |
115 | Arguments:\r | |
116 | \r | |
117 | List - List of variables\r | |
118 | Callback - Routine to be called for each iterated variable.\r | |
119 | \r | |
120 | Returns: \r | |
121 | \r | |
122 | VOID\r | |
123 | \r | |
124 | --*/\r | |
125 | \r | |
126 | {\r | |
127 | CHAR16 *MapName;\r | |
128 | EFI_GUID *MapGuid;\r | |
129 | UINT16 MapId;\r | |
130 | VOID *Map;\r | |
131 | UINTN MapSize;\r | |
132 | \r | |
133 | while (NULL != List) {\r | |
134 | EfiLibHiiVariablePackGetMap (List->VariablePack, &MapName, &MapGuid, &MapId, &Map, &MapSize);\r | |
135 | //\r | |
136 | // call the callback\r | |
137 | //\r | |
138 | Callback (MapName, MapGuid, MapId, Map, MapSize); \r | |
139 | List = List->NextVariablePack;\r | |
140 | }\r | |
141 | }\r | |
142 | \r | |
143 | \r | |
144 | EFI_STATUS\r | |
145 | EfiLibHiiVariablePackListGetMapByIdx (\r | |
146 | IN UINTN Idx, \r | |
147 | IN EFI_HII_VARIABLE_PACK_LIST *List, \r | |
148 | OUT CHAR16 **Name, OPTIONAL\r | |
149 | OUT EFI_GUID **Guid, OPTIONAL\r | |
150 | OUT UINT16 *Id, OPTIONAL\r | |
151 | OUT VOID **Var,\r | |
152 | OUT UINTN *Size\r | |
153 | )\r | |
154 | \r | |
155 | /*++\r | |
156 | \r | |
157 | Routine Description:\r | |
158 | \r | |
159 | Finds a variable form List given \r | |
160 | the order number as appears in the List.\r | |
161 | \r | |
162 | Arguments:\r | |
163 | \r | |
164 | Idx - The index of the variable/map to retrieve\r | |
165 | List - List of variables\r | |
166 | Name - Name of the variable/map\r | |
167 | Guid - GUID of the variable/map\r | |
168 | Var - Pointer to the variable/map\r | |
169 | Size - Size of the variable/map in bytes\r | |
170 | \r | |
171 | Returns:\r | |
172 | \r | |
173 | EFI_SUCCESS - Variable is found, OUT parameters are valid\r | |
174 | EFI_NOT_FOUND - Variable is not found, OUT parameters are not valid\r | |
175 | \r | |
176 | --*/\r | |
177 | {\r | |
178 | CHAR16 *MapName;\r | |
179 | EFI_GUID *MapGuid;\r | |
180 | UINT16 MapId;\r | |
181 | VOID *Map;\r | |
182 | UINTN MapSize;\r | |
183 | \r | |
184 | while (NULL != List) {\r | |
185 | EfiLibHiiVariablePackGetMap (List->VariablePack, &MapName, &MapGuid, &MapId, &Map, &MapSize);\r | |
186 | if (0 == Idx--) {\r | |
187 | *Var = Map;\r | |
188 | *Size = MapSize;\r | |
189 | \r | |
190 | if (NULL != Name) {\r | |
191 | *Name = MapName;\r | |
192 | }\r | |
193 | \r | |
194 | if (NULL != Guid) {\r | |
195 | *Guid = MapGuid;\r | |
196 | }\r | |
197 | \r | |
198 | if (NULL != Id) {\r | |
199 | *Id = MapId;\r | |
200 | }\r | |
201 | \r | |
202 | return EFI_SUCCESS; // Map found\r | |
203 | }\r | |
204 | List = List->NextVariablePack;\r | |
205 | }\r | |
206 | //\r | |
207 | // If here, the map is not found\r | |
208 | //\r | |
209 | return EFI_NOT_FOUND; \r | |
210 | }\r | |
211 | \r | |
212 | \r | |
213 | EFI_STATUS\r | |
214 | EfiLibHiiVariablePackListGetMapById (\r | |
215 | IN UINT16 Id, \r | |
216 | IN EFI_HII_VARIABLE_PACK_LIST *List,\r | |
217 | OUT CHAR16 **Name, OPTIONAL\r | |
218 | OUT EFI_GUID **Guid, OPTIONAL\r | |
219 | OUT VOID **Var,\r | |
220 | OUT UINTN *Size\r | |
221 | )\r | |
222 | \r | |
223 | /*++\r | |
224 | \r | |
225 | Routine Description:\r | |
226 | \r | |
227 | Finds a variable form List given the \r | |
228 | order number as appears in the List.\r | |
229 | \r | |
230 | Arguments:\r | |
231 | \r | |
232 | Id - The ID of the variable/map to retrieve\r | |
233 | List - List of variables\r | |
234 | Name - Name of the variable/map\r | |
235 | Guid - GUID of the variable/map\r | |
236 | Var - Pointer to the variable/map\r | |
237 | Size - Size of the variable/map in bytes\r | |
238 | \r | |
239 | Returns:\r | |
240 | \r | |
241 | EFI_SUCCESS - Variable is found, OUT parameters are valid\r | |
242 | EFI_NOT_FOUND - Variable is not found, OUT parameters are not valid\r | |
243 | \r | |
244 | --*/\r | |
245 | \r | |
246 | { \r | |
247 | CHAR16 *MapName;\r | |
248 | EFI_GUID *MapGuid;\r | |
249 | UINT16 MapId;\r | |
250 | VOID *Map;\r | |
251 | UINTN MapSize;\r | |
252 | \r | |
253 | while (NULL != List) {\r | |
254 | EfiLibHiiVariablePackGetMap (List->VariablePack, &MapName, &MapGuid, &MapId, &Map, &MapSize);\r | |
255 | if (MapId == Id) {\r | |
256 | *Var = Map;\r | |
257 | *Size = MapSize;\r | |
258 | if (NULL != Name) {\r | |
259 | *Name = MapName;\r | |
260 | }\r | |
261 | if (NULL != Guid) {\r | |
262 | *Guid = MapGuid;\r | |
263 | }\r | |
264 | //\r | |
265 | // Map found\r | |
266 | //\r | |
267 | return EFI_SUCCESS; \r | |
268 | }\r | |
269 | List = List->NextVariablePack;\r | |
270 | }\r | |
271 | //\r | |
272 | // If here, the map is not found\r | |
273 | //\r | |
274 | return EFI_NOT_FOUND; \r | |
275 | }\r | |
276 | \r | |
277 | \r | |
278 | EFI_STATUS\r | |
279 | EfiLibHiiVariablePackListGetMap (\r | |
280 | IN EFI_HII_VARIABLE_PACK_LIST *List,\r | |
281 | IN CHAR16 *Name,\r | |
282 | IN EFI_GUID *Guid,\r | |
283 | OUT UINT16 *Id,\r | |
284 | OUT VOID **Var, \r | |
285 | OUT UINTN *Size\r | |
286 | )\r | |
287 | \r | |
288 | /*++\r | |
289 | \r | |
290 | Routine Description:\r | |
291 | \r | |
292 | Finds a variable form EFI_HII_VARIABLE_PACK_LIST given name and GUID.\r | |
293 | \r | |
294 | Arguments:\r | |
295 | \r | |
296 | List - List of variables\r | |
297 | Name - Name of the variable/map to be found\r | |
298 | Guid - GUID of the variable/map to be found\r | |
299 | Var - Pointer to the variable/map found\r | |
300 | Size - Size of the variable/map in bytes found\r | |
301 | \r | |
302 | Returns:\r | |
303 | \r | |
304 | EFI_SUCCESS - variable is found, OUT parameters are valid\r | |
305 | EFI_NOT_FOUND - variable is not found, OUT parameters are not valid\r | |
306 | \r | |
307 | --*/\r | |
308 | \r | |
309 | { \r | |
310 | VOID *Map;\r | |
311 | UINTN MapSize;\r | |
312 | UINT16 MapId;\r | |
313 | CHAR16 *MapName;\r | |
314 | EFI_GUID *MapGuid;\r | |
315 | \r | |
316 | while (NULL != List) {\r | |
317 | EfiLibHiiVariablePackGetMap (List->VariablePack, &MapName, &MapGuid, &MapId, &Map, &MapSize);\r | |
318 | if ((0 == StrCmp (Name, MapName)) && CompareGuid (Guid, MapGuid)) {\r | |
319 | *Id = MapId;\r | |
320 | *Var = Map;\r | |
321 | *Size = MapSize;\r | |
322 | return EFI_SUCCESS;\r | |
323 | }\r | |
324 | List = List->NextVariablePack;\r | |
325 | }\r | |
326 | //\r | |
327 | // If here, the map is not found\r | |
328 | //\r | |
329 | return EFI_NOT_FOUND;\r | |
330 | }\r | |
331 | \r | |
332 | EFI_STATUS\r | |
333 | EfiLibHiiVariableRetrieveFromNv (\r | |
334 | IN CHAR16 *Name,\r | |
335 | IN EFI_GUID *Guid,\r | |
336 | IN UINTN Size,\r | |
337 | OUT VOID **Var\r | |
338 | )\r | |
339 | /*++\r | |
340 | \r | |
341 | Routine Description:\r | |
342 | Finds out if a variable of specific Name/Guid/Size exists in NV. \r | |
343 | If it does, it will retrieve it into the Var. \r | |
344 | \r | |
345 | Arguments:\r | |
346 | Name, Guid, Size - Parameters of the variable to retrieve. Must match exactly.\r | |
347 | Var - Variable will be retrieved into buffer pointed by this pointer.\r | |
348 | If pointing to NULL, the buffer will be allocated. Caller is responsible for releasing the buffer.\r | |
349 | Returns:\r | |
350 | EFI_SUCCESS - The variable of exact Name/Guid/Size parameters was retrieved and written to Var.\r | |
351 | EFI_NOT_FOUND - The variable of this Name/Guid was not found in the NV.\r | |
352 | EFI_LOAD_ERROR - The variable in the NV was of different size, or NV API returned error.\r | |
353 | \r | |
354 | --*/\r | |
355 | {\r | |
356 | EFI_STATUS Status;\r | |
357 | UINTN SizeNv;\r | |
358 | \r | |
359 | //\r | |
360 | // Test for existence of the variable.\r | |
361 | //\r | |
362 | SizeNv = 0;\r | |
363 | Status = gRT->GetVariable (Name, Guid, NULL, &SizeNv, NULL);\r | |
364 | if (EFI_BUFFER_TOO_SMALL != Status) {\r | |
365 | ASSERT (EFI_SUCCESS != Status);\r | |
366 | return EFI_NOT_FOUND;\r | |
367 | }\r | |
368 | if (SizeNv != Size) {\r | |
369 | //\r | |
370 | // The variable is considered corrupt, as it has different size from expected.\r | |
371 | //\r | |
372 | return EFI_LOAD_ERROR; \r | |
373 | }\r | |
374 | \r | |
375 | if (NULL == *Var) {\r | |
376 | *Var = AllocatePool (Size);\r | |
377 | ASSERT (NULL != *Var);\r | |
378 | }\r | |
379 | SizeNv = Size;\r | |
380 | //\r | |
381 | // Final read into the Var\r | |
382 | //\r | |
383 | Status = gRT->GetVariable (Name, Guid, NULL, &SizeNv, *Var); \r | |
384 | //\r | |
385 | // No tolerance for random failures. Such behavior is undetermined and not validated.\r | |
386 | //\r | |
387 | ASSERT_EFI_ERROR (Status); \r | |
388 | ASSERT (SizeNv == Size);\r | |
389 | return EFI_SUCCESS;\r | |
390 | }\r | |
391 | \r | |
392 | \r | |
393 | \r | |
394 | EFI_STATUS\r | |
395 | EfiLibHiiVariableOverrideIfSuffix (\r | |
396 | IN CHAR16 *Suffix,\r | |
397 | IN CHAR16 *Name,\r | |
398 | IN EFI_GUID *Guid,\r | |
399 | IN UINTN Size,\r | |
400 | OUT VOID *Var\r | |
401 | ) \r | |
402 | /*++\r | |
403 | \r | |
404 | Routine Description:\r | |
405 | Overrrides the variable with NV data if found.\r | |
406 | But it only does it if the Name ends with specified Suffix.\r | |
407 | For example, if Suffix="MyOverride" and the Name="XyzSetupMyOverride",\r | |
408 | the Suffix matches the end of Name, so the variable will be loaded from NV\r | |
409 | provided the variable exists and the GUID and Size matches.\r | |
410 | \r | |
411 | Arguments:\r | |
412 | Suffix - Suffix the Name should end with.\r | |
413 | Name, Guid, Size - Parameters of the variable to retrieve. Must match exactly.\r | |
414 | Var - Variable will be retrieved into this buffer.\r | |
415 | Caller is responsible for providing storage of exactly Size size in bytes.\r | |
416 | Returns:\r | |
417 | EFI_SUCCESS - The variable was overriden with NV variable of same Name/Guid/Size.\r | |
418 | EFI_INVALID_PARAMETER - The name of the variable does not end with <Suffix>.\r | |
419 | EFI_NOT_FOUND - The variable of this Name/Guid was not found in the NV.\r | |
420 | EFI_LOAD_ERROR - The variable in the NV was of different size, or NV API returned error.\r | |
421 | \r | |
422 | --*/\r | |
423 | {\r | |
424 | UINTN StrLength;\r | |
425 | UINTN StrLenSuffix;\r | |
426 | \r | |
427 | StrLength = StrLen (Name);\r | |
428 | StrLenSuffix = StrLen (Suffix);\r | |
429 | if ((StrLength <= StrLenSuffix) || (0 != StrCmp (Suffix, &Name[StrLength - StrLenSuffix]))) {\r | |
430 | //\r | |
431 | // Not ending with <Suffix>.\r | |
432 | //\r | |
433 | return EFI_INVALID_PARAMETER; \r | |
434 | }\r | |
435 | return EfiLibHiiVariableRetrieveFromNv (Name, Guid, Size, &Var);\r | |
436 | }\r | |
437 | \r | |
438 | EFI_STATUS\r | |
439 | EfiLibHiiVariableOverrideBySuffix (\r | |
440 | IN CHAR16 *Suffix,\r | |
441 | IN CHAR16 *Name,\r | |
442 | IN EFI_GUID *Guid,\r | |
443 | IN UINTN Size,\r | |
444 | OUT VOID *Var\r | |
445 | ) \r | |
446 | /*++\r | |
447 | \r | |
448 | Routine Description:\r | |
449 | Overrrides the variable with NV data if found.\r | |
450 | But it only does it if the NV contains the same variable with Name is appended with Suffix. \r | |
451 | For example, if Suffix="MyOverride" and the Name="XyzSetup",\r | |
452 | the Suffix will be appended to the end of Name, and the variable with Name="XyzSetupMyOverride"\r | |
453 | will be loaded from NV provided the variable exists and the GUID and Size matches.\r | |
454 | \r | |
455 | Arguments:\r | |
456 | Suffix - Suffix the variable will be appended with.\r | |
457 | Name, Guid, Size - Parameters of the variable to retrieve. Must match exactly.\r | |
458 | Var - Variable will be retrieved into this buffer.\r | |
459 | Caller is responsible for providing storage of exactly Size size in bytes.\r | |
460 | \r | |
461 | Returns:\r | |
462 | EFI_SUCCESS - The variable was overriden with NV variable of same Name/Guid/Size.\r | |
463 | EFI_NOT_FOUND - The variable of this Name/Guid was not found in the NV.\r | |
464 | EFI_LOAD_ERROR - The variable in the NV was of different size, or NV API returned error.\r | |
465 | \r | |
466 | --*/\r | |
467 | {\r | |
468 | EFI_STATUS Status;\r | |
469 | CHAR16 *NameSuffixed;\r | |
470 | \r | |
471 | //\r | |
472 | // enough to concatenate both strings.\r | |
473 | //\r | |
474 | NameSuffixed = AllocateZeroPool ((StrLen (Name) + StrLen (Suffix) + 1) * sizeof (CHAR16)); \r | |
475 | \r | |
476 | StrCpy (NameSuffixed, Name);\r | |
477 | StrCat (NameSuffixed, Suffix);\r | |
478 | \r | |
479 | Status = EfiLibHiiVariableRetrieveFromNv (NameSuffixed, Guid, Size, &Var);\r | |
480 | gBS->FreePool (NameSuffixed);\r | |
481 | \r | |
482 | return Status;\r | |
483 | }\r | |
484 | \r |