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 | \r |
14 | BdsMisc.c\r |
15 | \r |
16 | Abstract:\r |
17 | \r |
18 | Misc BDS library function\r |
19 | \r |
20 | --*/\r |
21 | \r |
22 | extern UINT16 gPlatformBootTimeOutDefault;\r |
23 | \r |
24 | UINT16\r |
25 | BdsLibGetTimeout (\r |
26 | VOID\r |
27 | )\r |
28 | /*++\r |
29 | \r |
30 | Routine Description:\r |
31 | \r |
32 | Return the default value for system Timeout variable.\r |
33 | \r |
34 | Arguments:\r |
35 | \r |
36 | None\r |
37 | \r |
38 | Returns:\r |
39 | \r |
40 | Timeout value.\r |
41 | \r |
42 | --*/\r |
43 | {\r |
44 | UINT16 Timeout;\r |
45 | UINTN Size;\r |
46 | EFI_STATUS Status;\r |
47 | \r |
48 | //\r |
49 | // Return Timeout variable or 0xffff if no valid\r |
50 | // Timeout variable exists.\r |
51 | //\r |
52 | Size = sizeof (UINT16);\r |
53 | Status = gRT->GetVariable (L"Timeout", &gEfiGlobalVariableGuid, NULL, &Size, &Timeout);\r |
54 | if (!EFI_ERROR (Status)) {\r |
55 | return Timeout;\r |
56 | }\r |
57 | //\r |
58 | // To make the current EFI Automatic-Test activity possible, just add\r |
59 | // following code to make AutoBoot enabled when this variable is not\r |
60 | // present.\r |
61 | // This code should be removed later.\r |
62 | //\r |
63 | Timeout = gPlatformBootTimeOutDefault;\r |
64 | \r |
65 | //\r |
66 | // Notes: Platform should set default variable if non exists on all error cases!!!\r |
67 | //\r |
68 | Status = gRT->SetVariable (\r |
69 | L"Timeout",\r |
70 | &gEfiGlobalVariableGuid,\r |
71 | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,\r |
72 | sizeof (UINT16),\r |
73 | &Timeout\r |
74 | );\r |
75 | return Timeout;\r |
76 | }\r |
77 | \r |
78 | VOID\r |
79 | BdsLibLoadDrivers (\r |
80 | IN LIST_ENTRY *BdsDriverLists\r |
81 | )\r |
82 | /*++\r |
83 | \r |
84 | Routine Description:\r |
85 | \r |
86 | The function will go through the driver optoin link list, load and start\r |
87 | every driver the driver optoin device path point to.\r |
88 | \r |
89 | Arguments:\r |
90 | \r |
91 | BdsDriverLists - The header of the current driver option link list\r |
92 | \r |
93 | Returns:\r |
94 | \r |
95 | None\r |
96 | \r |
97 | --*/\r |
98 | {\r |
99 | EFI_STATUS Status;\r |
100 | LIST_ENTRY *Link;\r |
101 | BDS_COMMON_OPTION *Option;\r |
102 | EFI_HANDLE ImageHandle;\r |
103 | EFI_LOADED_IMAGE_PROTOCOL *ImageInfo;\r |
104 | UINTN ExitDataSize;\r |
105 | CHAR16 *ExitData;\r |
106 | BOOLEAN ReconnectAll;\r |
107 | \r |
108 | ReconnectAll = FALSE;\r |
109 | \r |
110 | //\r |
111 | // Process the driver option\r |
112 | //\r |
113 | for (Link = BdsDriverLists->ForwardLink; Link != BdsDriverLists; Link = Link->ForwardLink) {\r |
114 | Option = CR (Link, BDS_COMMON_OPTION, Link, BDS_LOAD_OPTION_SIGNATURE);\r |
115 | //\r |
116 | // If a load option is not marked as LOAD_OPTION_ACTIVE,\r |
117 | // the boot manager will not automatically load the option.\r |
118 | //\r |
119 | if (!IS_LOAD_OPTION_TYPE (Option->Attribute, LOAD_OPTION_ACTIVE)) {\r |
120 | continue;\r |
121 | }\r |
122 | //\r |
123 | // If a driver load option is marked as LOAD_OPTION_FORCE_RECONNECT,\r |
124 | // then all of the EFI drivers in the system will be disconnected and\r |
125 | // reconnected after the last driver load option is processed.\r |
126 | //\r |
127 | if (IS_LOAD_OPTION_TYPE (Option->Attribute, LOAD_OPTION_FORCE_RECONNECT)) {\r |
128 | ReconnectAll = TRUE;\r |
129 | }\r |
130 | //\r |
131 | // Make sure the driver path is connected.\r |
132 | //\r |
133 | BdsLibConnectDevicePath (Option->DevicePath);\r |
134 | \r |
135 | //\r |
136 | // Load and start the image that Driver#### describes\r |
137 | //\r |
138 | Status = gBS->LoadImage (\r |
139 | FALSE,\r |
140 | mBdsImageHandle,\r |
141 | Option->DevicePath,\r |
142 | NULL,\r |
143 | 0,\r |
144 | &ImageHandle\r |
145 | );\r |
146 | \r |
147 | if (!EFI_ERROR (Status)) {\r |
148 | gBS->HandleProtocol (ImageHandle, &gEfiLoadedImageProtocolGuid, &ImageInfo);\r |
149 | \r |
150 | //\r |
151 | // Verify whether this image is a driver, if not,\r |
152 | // exit it and continue to parse next load option\r |
153 | //\r |
154 | if (ImageInfo->ImageCodeType != EfiBootServicesCode && ImageInfo->ImageCodeType != EfiRuntimeServicesCode) {\r |
155 | gBS->Exit (ImageHandle, EFI_INVALID_PARAMETER, 0, NULL);\r |
156 | continue;\r |
157 | }\r |
158 | \r |
159 | if (Option->LoadOptionsSize != 0) {\r |
160 | ImageInfo->LoadOptionsSize = Option->LoadOptionsSize;\r |
161 | ImageInfo->LoadOptions = Option->LoadOptions;\r |
162 | }\r |
163 | //\r |
164 | // Before calling the image, enable the Watchdog Timer for\r |
165 | // the 5 Minute period\r |
166 | //\r |
167 | gBS->SetWatchdogTimer (5 * 60, 0x0000, 0x00, NULL);\r |
168 | \r |
169 | Status = gBS->StartImage (ImageHandle, &ExitDataSize, &ExitData);\r |
170 | DEBUG ((EFI_D_INFO | EFI_D_LOAD, "Driver Return Status = %r\n", Status));\r |
171 | \r |
172 | //\r |
173 | // Clear the Watchdog Timer after the image returns\r |
174 | //\r |
175 | gBS->SetWatchdogTimer (0x0000, 0x0000, 0x0000, NULL);\r |
176 | }\r |
177 | }\r |
178 | //\r |
179 | // Process the LOAD_OPTION_FORCE_RECONNECT driver option\r |
180 | //\r |
181 | if (ReconnectAll) {\r |
182 | BdsLibDisconnectAllEfi ();\r |
183 | BdsLibConnectAll ();\r |
184 | }\r |
185 | \r |
186 | }\r |
187 | \r |
188 | EFI_STATUS\r |
189 | BdsLibRegisterNewOption (\r |
190 | IN LIST_ENTRY *BdsOptionList,\r |
191 | IN EFI_DEVICE_PATH_PROTOCOL *DevicePath,\r |
192 | IN CHAR16 *String,\r |
193 | IN CHAR16 *VariableName\r |
194 | )\r |
195 | /*++\r |
196 | \r |
197 | Routine Description:\r |
198 | \r |
199 | This function will register the new boot#### or driver#### option base on\r |
200 | the VariableName. The new registered boot#### or driver#### will be linked\r |
201 | to BdsOptionList and also update to the VariableName. After the boot#### or\r |
202 | driver#### updated, the BootOrder or DriverOrder will also be updated.\r |
203 | \r |
204 | Arguments:\r |
205 | \r |
206 | BdsOptionList - The header of the boot#### or driver#### link list\r |
207 | \r |
208 | DevicePath - The device path which the boot####\r |
209 | or driver#### option present\r |
210 | \r |
211 | String - The description of the boot#### or driver####\r |
212 | \r |
213 | VariableName - Indicate if the boot#### or driver#### option\r |
214 | \r |
215 | Returns:\r |
216 | \r |
217 | EFI_SUCCESS - The boot#### or driver#### have been success registered\r |
218 | \r |
219 | EFI_STATUS - Return the status of gRT->SetVariable ().\r |
220 | \r |
221 | --*/\r |
222 | {\r |
223 | EFI_STATUS Status;\r |
224 | UINTN Index;\r |
225 | UINT16 MaxOptionNumber;\r |
226 | UINT16 RegisterOptionNumber;\r |
227 | UINT16 *TempOptionPtr;\r |
228 | UINTN TempOptionSize;\r |
229 | UINT16 *OptionOrderPtr;\r |
230 | VOID *OptionPtr;\r |
231 | UINTN OptionSize;\r |
232 | UINT8 *TempPtr;\r |
233 | EFI_DEVICE_PATH_PROTOCOL *OptionDevicePath;\r |
234 | CHAR16 *Description;\r |
235 | CHAR16 OptionName[10];\r |
236 | BOOLEAN UpdateBootDevicePath;\r |
237 | \r |
238 | OptionPtr = NULL;\r |
239 | OptionSize = 0;\r |
240 | TempPtr = NULL;\r |
241 | OptionDevicePath = NULL;\r |
242 | Description = NULL;\r |
243 | MaxOptionNumber = 0;\r |
244 | OptionOrderPtr = NULL;\r |
245 | UpdateBootDevicePath = FALSE;\r |
246 | ZeroMem (OptionName, sizeof (OptionName));\r |
247 | \r |
248 | TempOptionSize = 0;\r |
249 | TempOptionPtr = BdsLibGetVariableAndSize (\r |
250 | VariableName,\r |
251 | &gEfiGlobalVariableGuid,\r |
252 | &TempOptionSize\r |
253 | );\r |
254 | //\r |
255 | // Compare with current option variable\r |
256 | //\r |
257 | for (Index = 0; Index < TempOptionSize / sizeof (UINT16); Index++) {\r |
258 | //\r |
259 | // Got the max option#### number\r |
260 | //\r |
261 | if (MaxOptionNumber < TempOptionPtr[Index]) {\r |
262 | MaxOptionNumber = TempOptionPtr[Index];\r |
263 | }\r |
264 | \r |
265 | if (*VariableName == 'B') {\r |
266 | UnicodeSPrint (OptionName, sizeof (OptionName), L"Boot%04x", TempOptionPtr[Index]);\r |
267 | } else {\r |
268 | UnicodeSPrint (OptionName, sizeof (OptionName), L"Driver%04x", TempOptionPtr[Index]);\r |
269 | }\r |
270 | \r |
271 | OptionPtr = BdsLibGetVariableAndSize (\r |
272 | OptionName,\r |
273 | &gEfiGlobalVariableGuid,\r |
274 | &OptionSize\r |
275 | );\r |
276 | TempPtr = OptionPtr;\r |
277 | TempPtr += sizeof (UINT32) + sizeof (UINT16);\r |
278 | Description = (CHAR16 *) TempPtr;\r |
279 | TempPtr += StrSize ((CHAR16 *) TempPtr);\r |
280 | OptionDevicePath = (EFI_DEVICE_PATH_PROTOCOL *) TempPtr;\r |
281 | \r |
282 | //\r |
283 | // Notes: the description may will change base on the GetStringToken\r |
284 | //\r |
285 | if (CompareMem (Description, String, StrSize (Description)) == 0) {\r |
286 | if (CompareMem (OptionDevicePath, DevicePath, GetDevicePathSize (OptionDevicePath)) == 0) {\r |
287 | //\r |
288 | // Got the option, so just return\r |
289 | //\r |
290 | gBS->FreePool (OptionPtr);\r |
291 | gBS->FreePool (TempOptionPtr);\r |
292 | return EFI_SUCCESS;\r |
293 | } else {\r |
294 | //\r |
295 | // Boot device path changed, need update.\r |
296 | //\r |
297 | UpdateBootDevicePath = TRUE;\r |
298 | break;\r |
299 | }\r |
300 | }\r |
301 | \r |
302 | gBS->FreePool (OptionPtr);\r |
303 | }\r |
304 | \r |
305 | OptionSize = sizeof (UINT32) + sizeof (UINT16) + StrSize (String) + GetDevicePathSize (DevicePath);\r |
306 | OptionPtr = AllocateZeroPool (OptionSize);\r |
307 | TempPtr = OptionPtr;\r |
308 | *(UINT32 *) TempPtr = LOAD_OPTION_ACTIVE;\r |
309 | TempPtr += sizeof (UINT32);\r |
310 | *(UINT16 *) TempPtr = (UINT16) GetDevicePathSize (DevicePath);\r |
311 | TempPtr += sizeof (UINT16);\r |
312 | CopyMem (TempPtr, String, StrSize (String));\r |
313 | TempPtr += StrSize (String);\r |
314 | CopyMem (TempPtr, DevicePath, GetDevicePathSize (DevicePath));\r |
315 | \r |
316 | if (UpdateBootDevicePath) {\r |
317 | //\r |
318 | // The number in option#### to be updated\r |
319 | //\r |
320 | RegisterOptionNumber = TempOptionPtr[Index];\r |
321 | } else {\r |
322 | //\r |
323 | // The new option#### number\r |
324 | //\r |
325 | RegisterOptionNumber = MaxOptionNumber + 1;\r |
326 | }\r |
327 | \r |
328 | if (*VariableName == 'B') {\r |
329 | UnicodeSPrint (OptionName, sizeof (OptionName), L"Boot%04x", RegisterOptionNumber);\r |
330 | } else {\r |
331 | UnicodeSPrint (OptionName, sizeof (OptionName), L"Driver%04x", RegisterOptionNumber);\r |
332 | }\r |
333 | \r |
334 | Status = gRT->SetVariable (\r |
335 | OptionName,\r |
336 | &gEfiGlobalVariableGuid,\r |
337 | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,\r |
338 | OptionSize,\r |
339 | OptionPtr\r |
340 | );\r |
341 | if (EFI_ERROR (Status) || UpdateBootDevicePath) {\r |
342 | gBS->FreePool (OptionPtr);\r |
343 | gBS->FreePool (TempOptionPtr);\r |
344 | return Status;\r |
345 | }\r |
346 | \r |
347 | gBS->FreePool (OptionPtr);\r |
348 | \r |
349 | //\r |
350 | // Update the option order variable\r |
351 | //\r |
352 | OptionOrderPtr = AllocateZeroPool ((Index + 1) * sizeof (UINT16));\r |
353 | CopyMem (OptionOrderPtr, TempOptionPtr, Index * sizeof (UINT16));\r |
354 | OptionOrderPtr[Index] = RegisterOptionNumber;\r |
355 | Status = gRT->SetVariable (\r |
356 | VariableName,\r |
357 | &gEfiGlobalVariableGuid,\r |
358 | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,\r |
359 | (Index + 1) * sizeof (UINT16),\r |
360 | OptionOrderPtr\r |
361 | );\r |
362 | if (EFI_ERROR (Status)) {\r |
363 | gBS->FreePool (TempOptionPtr);\r |
364 | gBS->FreePool (OptionOrderPtr);\r |
365 | return Status;\r |
366 | }\r |
367 | \r |
368 | gBS->FreePool (TempOptionPtr);\r |
369 | gBS->FreePool (OptionOrderPtr);\r |
370 | \r |
371 | return EFI_SUCCESS;\r |
372 | }\r |
373 | \r |
374 | BDS_COMMON_OPTION *\r |
375 | BdsLibVariableToOption (\r |
376 | IN OUT LIST_ENTRY *BdsCommonOptionList,\r |
377 | IN CHAR16 *VariableName\r |
378 | )\r |
379 | /*++\r |
380 | \r |
381 | Routine Description:\r |
382 | \r |
383 | Build the boot#### or driver#### option from the VariableName, the \r |
384 | build boot#### or driver#### will also be linked to BdsCommonOptionList\r |
385 | \r |
386 | Arguments:\r |
387 | \r |
388 | BdsCommonOptionList - The header of the boot#### or driver#### option link list\r |
389 | \r |
390 | VariableName - EFI Variable name indicate if it is boot#### or driver####\r |
391 | \r |
392 | Returns:\r |
393 | \r |
394 | BDS_COMMON_OPTION - Get the option just been created\r |
395 | \r |
396 | NULL - Failed to get the new option\r |
397 | \r |
398 | --*/\r |
399 | {\r |
400 | UINT32 Attribute;\r |
401 | UINT16 FilePathSize;\r |
402 | UINT8 *Variable;\r |
403 | UINT8 *TempPtr;\r |
404 | UINTN VariableSize;\r |
405 | EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r |
406 | BDS_COMMON_OPTION *Option;\r |
407 | VOID *LoadOptions;\r |
408 | UINT32 LoadOptionsSize;\r |
409 | CHAR16 *Description;\r |
410 | \r |
411 | //\r |
412 | // Read the variable. We will never free this data.\r |
413 | //\r |
414 | Variable = BdsLibGetVariableAndSize (\r |
415 | VariableName,\r |
416 | &gEfiGlobalVariableGuid,\r |
417 | &VariableSize\r |
418 | );\r |
419 | if (Variable == NULL) {\r |
420 | return NULL;\r |
421 | }\r |
422 | //\r |
423 | // Notes: careful defined the variable of Boot#### or\r |
424 | // Driver####, consider use some macro to abstract the code\r |
425 | //\r |
426 | //\r |
427 | // Get the option attribute\r |
428 | //\r |
429 | TempPtr = Variable;\r |
430 | Attribute = *(UINT32 *) Variable;\r |
431 | TempPtr += sizeof (UINT32);\r |
432 | \r |
433 | //\r |
434 | // Get the option's device path size\r |
435 | //\r |
436 | FilePathSize = *(UINT16 *) TempPtr;\r |
437 | TempPtr += sizeof (UINT16);\r |
438 | \r |
439 | //\r |
440 | // Get the option's description string\r |
441 | //\r |
442 | Description = (CHAR16 *) TempPtr;\r |
443 | \r |
444 | //\r |
445 | // Get the option's description string size\r |
446 | //\r |
447 | TempPtr += StrSize ((CHAR16 *) TempPtr);\r |
448 | \r |
449 | //\r |
450 | // Get the option's device path\r |
451 | //\r |
452 | DevicePath = (EFI_DEVICE_PATH_PROTOCOL *) TempPtr;\r |
453 | TempPtr += FilePathSize;\r |
454 | \r |
455 | LoadOptions = TempPtr;\r |
456 | LoadOptionsSize = (UINT32) (VariableSize - (UINTN) (TempPtr - Variable));\r |
457 | \r |
458 | //\r |
459 | // The Console variables may have multiple device paths, so make\r |
460 | // an Entry for each one.\r |
461 | //\r |
462 | Option = AllocateZeroPool (sizeof (BDS_COMMON_OPTION));\r |
463 | if (Option == NULL) {\r |
464 | return NULL;\r |
465 | }\r |
466 | \r |
467 | Option->Signature = BDS_LOAD_OPTION_SIGNATURE;\r |
468 | Option->DevicePath = AllocateZeroPool (GetDevicePathSize (DevicePath));\r |
469 | CopyMem (Option->DevicePath, DevicePath, GetDevicePathSize (DevicePath));\r |
470 | Option->Attribute = Attribute;\r |
471 | Option->Description = AllocateZeroPool (StrSize (Description));\r |
472 | CopyMem (Option->Description, Description, StrSize (Description));\r |
473 | Option->LoadOptions = AllocateZeroPool (LoadOptionsSize);\r |
474 | CopyMem (Option->LoadOptions, LoadOptions, LoadOptionsSize);\r |
475 | Option->LoadOptionsSize = LoadOptionsSize;\r |
476 | \r |
477 | //\r |
478 | // Insert active entry to BdsDeviceList\r |
479 | //\r |
480 | if ((Option->Attribute & LOAD_OPTION_ACTIVE) == LOAD_OPTION_ACTIVE) {\r |
481 | InsertTailList (BdsCommonOptionList, &Option->Link);\r |
482 | gBS->FreePool (Variable);\r |
483 | return Option;\r |
484 | }\r |
485 | \r |
486 | gBS->FreePool (Variable);\r |
487 | gBS->FreePool (Option);\r |
488 | return NULL;\r |
489 | \r |
490 | }\r |
491 | \r |
492 | EFI_STATUS\r |
493 | BdsLibBuildOptionFromVar (\r |
494 | IN LIST_ENTRY *BdsCommonOptionList,\r |
495 | IN CHAR16 *VariableName\r |
496 | )\r |
497 | /*++\r |
498 | \r |
499 | Routine Description:\r |
500 | \r |
501 | Process BootOrder, or DriverOrder variables, by calling\r |
502 | BdsLibVariableToOption () for each UINT16 in the variables.\r |
503 | \r |
504 | Arguments:\r |
505 | \r |
506 | BdsCommonOptionList - The header of the option list base on variable\r |
507 | VariableName\r |
508 | \r |
509 | VariableName - EFI Variable name indicate the BootOrder or DriverOrder\r |
510 | \r |
511 | Returns:\r |
512 | \r |
513 | EFI_SUCCESS - Success create the boot option or driver option list\r |
514 | \r |
515 | EFI_OUT_OF_RESOURCES - Failed to get the boot option or driver option list\r |
516 | \r |
517 | --*/\r |
518 | {\r |
519 | UINT16 *OptionOrder;\r |
520 | UINTN OptionOrderSize;\r |
521 | UINTN Index;\r |
522 | BDS_COMMON_OPTION *Option;\r |
523 | CHAR16 OptionName[20];\r |
524 | \r |
525 | //\r |
526 | // Zero Buffer in order to get all BOOT#### variables\r |
527 | //\r |
528 | ZeroMem (OptionName, sizeof (OptionName));\r |
529 | \r |
530 | //\r |
531 | // Read the BootOrder, or DriverOrder variable.\r |
532 | //\r |
533 | OptionOrder = BdsLibGetVariableAndSize (\r |
534 | VariableName,\r |
535 | &gEfiGlobalVariableGuid,\r |
536 | &OptionOrderSize\r |
537 | );\r |
538 | if (OptionOrder == NULL) {\r |
539 | return EFI_OUT_OF_RESOURCES;\r |
540 | }\r |
541 | \r |
542 | for (Index = 0; Index < OptionOrderSize / sizeof (UINT16); Index++) {\r |
543 | if (*VariableName == 'B') {\r |
544 | UnicodeSPrint (OptionName, sizeof (OptionName), L"Boot%04x", OptionOrder[Index]);\r |
545 | } else {\r |
546 | UnicodeSPrint (OptionName, sizeof (OptionName), L"Driver%04x", OptionOrder[Index]);\r |
547 | }\r |
548 | Option = BdsLibVariableToOption (BdsCommonOptionList, OptionName);\r |
549 | Option->BootCurrent = OptionOrder[Index];\r |
550 | \r |
551 | }\r |
552 | \r |
553 | gBS->FreePool (OptionOrder);\r |
554 | \r |
555 | return EFI_SUCCESS;\r |
556 | }\r |
557 | \r |
558 | EFI_STATUS\r |
559 | BdsLibGetBootMode (\r |
560 | OUT EFI_BOOT_MODE *BootMode\r |
561 | )\r |
562 | /*++\r |
563 | \r |
564 | Routine Description:\r |
565 | \r |
566 | Get boot mode by looking up configuration table and parsing HOB list\r |
567 | \r |
568 | Arguments:\r |
569 | \r |
570 | BootMode - Boot mode from PEI handoff HOB.\r |
571 | \r |
572 | Returns:\r |
573 | \r |
574 | EFI_SUCCESS - Successfully get boot mode\r |
575 | \r |
576 | EFI_NOT_FOUND - Can not find the current system boot mode\r |
577 | \r |
578 | --*/\r |
579 | {\r |
580 | EFI_HOB_HANDOFF_INFO_TABLE *HobList;\r |
581 | \r |
582 | HobList = GetHobList ();\r |
583 | ASSERT (HobList->Header.HobType == EFI_HOB_TYPE_HANDOFF);\r |
584 | *BootMode = HobList->BootMode;\r |
585 | \r |
586 | return EFI_SUCCESS;\r |
587 | }\r |
588 | \r |
589 | VOID *\r |
590 | BdsLibGetVariableAndSize (\r |
591 | IN CHAR16 *Name,\r |
592 | IN EFI_GUID *VendorGuid,\r |
593 | OUT UINTN *VariableSize\r |
594 | )\r |
595 | /*++\r |
596 | \r |
597 | Routine Description:\r |
598 | \r |
599 | Read the EFI variable (VendorGuid/Name) and return a dynamically allocated\r |
600 | buffer, and the size of the buffer. If failure return NULL.\r |
601 | \r |
602 | Arguments:\r |
603 | \r |
604 | Name - String part of EFI variable name\r |
605 | \r |
606 | VendorGuid - GUID part of EFI variable name\r |
607 | \r |
608 | VariableSize - Returns the size of the EFI variable that was read\r |
609 | \r |
610 | Returns:\r |
611 | \r |
612 | Dynamically allocated memory that contains a copy of the EFI variable.\r |
613 | Caller is responsible freeing the buffer.\r |
614 | \r |
615 | NULL - Variable was not read\r |
616 | \r |
617 | --*/\r |
618 | {\r |
619 | EFI_STATUS Status;\r |
620 | UINTN BufferSize;\r |
621 | VOID *Buffer;\r |
622 | \r |
623 | Buffer = NULL;\r |
624 | \r |
625 | //\r |
626 | // Pass in a zero size buffer to find the required buffer size.\r |
627 | //\r |
628 | BufferSize = 0;\r |
629 | Status = gRT->GetVariable (Name, VendorGuid, NULL, &BufferSize, Buffer);\r |
630 | if (Status == EFI_BUFFER_TOO_SMALL) {\r |
631 | //\r |
632 | // Allocate the buffer to return\r |
633 | //\r |
634 | Buffer = AllocateZeroPool (BufferSize);\r |
635 | if (Buffer == NULL) {\r |
636 | return NULL;\r |
637 | }\r |
638 | //\r |
639 | // Read variable into the allocated buffer.\r |
640 | //\r |
641 | Status = gRT->GetVariable (Name, VendorGuid, NULL, &BufferSize, Buffer);\r |
642 | if (EFI_ERROR (Status)) {\r |
643 | BufferSize = 0;\r |
644 | }\r |
645 | }\r |
646 | \r |
647 | *VariableSize = BufferSize;\r |
648 | return Buffer;\r |
649 | }\r |
650 | \r |
651 | BOOLEAN\r |
652 | BdsLibMatchDevicePaths (\r |
653 | IN EFI_DEVICE_PATH_PROTOCOL *Multi,\r |
654 | IN EFI_DEVICE_PATH_PROTOCOL *Single\r |
655 | )\r |
656 | /*++\r |
657 | \r |
658 | Routine Description:\r |
659 | \r |
660 | Function compares a device path data structure to that of all the nodes of a\r |
661 | second device path instance.\r |
662 | \r |
663 | Arguments:\r |
664 | \r |
665 | Multi - A pointer to a multi-instance device path data structure.\r |
666 | \r |
667 | Single - A pointer to a single-instance device path data structure.\r |
668 | \r |
669 | Returns:\r |
670 | \r |
671 | TRUE - If the Single is contained within Multi\r |
672 | \r |
673 | FALSE - The Single is not match within Multi\r |
674 | \r |
675 | \r |
676 | --*/\r |
677 | {\r |
678 | EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r |
679 | EFI_DEVICE_PATH_PROTOCOL *DevicePathInst;\r |
680 | UINTN Size;\r |
681 | \r |
682 | if (!Multi || !Single) {\r |
683 | return FALSE;\r |
684 | }\r |
685 | \r |
686 | DevicePath = Multi;\r |
687 | DevicePathInst = GetNextDevicePathInstance (&DevicePath, &Size);\r |
688 | Size -= sizeof (EFI_DEVICE_PATH_PROTOCOL);\r |
689 | \r |
690 | //\r |
691 | // Search for the match of 'Single' in 'Multi'\r |
692 | //\r |
693 | while (DevicePathInst != NULL) {\r |
694 | //\r |
695 | // If the single device path is found in multiple device paths,\r |
696 | // return success\r |
697 | //\r |
698 | if (Size == 0) {\r |
699 | return FALSE;\r |
700 | }\r |
701 | \r |
702 | if (CompareMem (Single, DevicePathInst, Size) == 0) {\r |
703 | return TRUE;\r |
704 | }\r |
705 | \r |
706 | gBS->FreePool (DevicePathInst);\r |
707 | DevicePathInst = GetNextDevicePathInstance (&DevicePath, &Size);\r |
708 | Size -= sizeof (EFI_DEVICE_PATH_PROTOCOL);\r |
709 | }\r |
710 | \r |
711 | return FALSE;\r |
712 | }\r |
713 | \r |
714 | EFI_STATUS\r |
715 | BdsLibOutputStrings (\r |
716 | IN EFI_SIMPLE_TEXT_OUT_PROTOCOL *ConOut,\r |
717 | ...\r |
718 | )\r |
719 | /*++\r |
720 | \r |
721 | Routine Description:\r |
722 | \r |
723 | This function prints a series of strings.\r |
724 | \r |
725 | Arguments:\r |
726 | \r |
727 | ConOut - Pointer to EFI_SIMPLE_TEXT_OUT_PROTOCOL\r |
728 | \r |
729 | ... - A variable argument list containing series of strings,\r |
730 | the last string must be NULL.\r |
731 | \r |
732 | Returns:\r |
733 | \r |
734 | EFI_SUCCESS - Success print out the string using ConOut.\r |
735 | \r |
736 | EFI_STATUS - Return the status of the ConOut->OutputString ().\r |
737 | \r |
738 | --*/\r |
739 | {\r |
740 | VA_LIST args;\r |
741 | EFI_STATUS Status;\r |
742 | CHAR16 *String;\r |
743 | \r |
744 | Status = EFI_SUCCESS;\r |
745 | VA_START (args, ConOut);\r |
746 | \r |
747 | while (!EFI_ERROR (Status)) {\r |
748 | //\r |
749 | // If String is NULL, then it's the end of the list\r |
750 | //\r |
751 | String = VA_ARG (args, CHAR16 *);\r |
752 | if (!String) {\r |
753 | break;\r |
754 | }\r |
755 | \r |
756 | Status = ConOut->OutputString (ConOut, String);\r |
757 | \r |
758 | if (EFI_ERROR (Status)) {\r |
759 | break;\r |
760 | }\r |
761 | }\r |
762 | \r |
763 | return Status;\r |
764 | }\r |