| 1 | /*++\r |
| 2 | \r |
| 3 | Copyright (c) 2006 - 2007, 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 | BdsBoot.c\r |
| 15 | \r |
| 16 | Abstract:\r |
| 17 | \r |
| 18 | BDS Lib functions which relate with create or process the boot\r |
| 19 | option.\r |
| 20 | \r |
| 21 | --*/\r |
| 22 | \r |
| 23 | #include <EdkGenericBdsLibInternal.h>\r |
| 24 | \r |
| 25 | BOOLEAN mEnumBootDevice = FALSE;\r |
| 26 | \r |
| 27 | EFI_STATUS\r |
| 28 | BdsLibDoLegacyBoot (\r |
| 29 | IN BDS_COMMON_OPTION *Option\r |
| 30 | )\r |
| 31 | /*++\r |
| 32 | \r |
| 33 | Routine Description:\r |
| 34 | \r |
| 35 | Boot the legacy system with the boot option\r |
| 36 | \r |
| 37 | Arguments:\r |
| 38 | \r |
| 39 | Option - The legacy boot option which have BBS device path\r |
| 40 | \r |
| 41 | Returns:\r |
| 42 | \r |
| 43 | EFI_UNSUPPORTED - There is no legacybios protocol, do not support\r |
| 44 | legacy boot.\r |
| 45 | \r |
| 46 | EFI_STATUS - Return the status of LegacyBios->LegacyBoot ().\r |
| 47 | \r |
| 48 | --*/\r |
| 49 | {\r |
| 50 | EFI_STATUS Status;\r |
| 51 | EFI_LEGACY_BIOS_PROTOCOL *LegacyBios;\r |
| 52 | \r |
| 53 | Status = gBS->LocateProtocol (&gEfiLegacyBiosProtocolGuid, NULL, &LegacyBios);\r |
| 54 | if (EFI_ERROR (Status)) {\r |
| 55 | //\r |
| 56 | // If no LegacyBios protocol we do not support legacy boot\r |
| 57 | //\r |
| 58 | return EFI_UNSUPPORTED;\r |
| 59 | }\r |
| 60 | //\r |
| 61 | // Notes: if we seperate the int 19, then we don't need to refresh BBS\r |
| 62 | //\r |
| 63 | BdsRefreshBbsTableForBoot (Option);\r |
| 64 | \r |
| 65 | //\r |
| 66 | // Write boot to OS performance data to a file\r |
| 67 | //\r |
| 68 | PERF_CODE (\r |
| 69 | WriteBootToOsPerformanceData ();\r |
| 70 | );\r |
| 71 | \r |
| 72 | \r |
| 73 | DEBUG ((EFI_D_INFO | EFI_D_LOAD, "Legacy Boot: %S\n", Option->Description));\r |
| 74 | return LegacyBios->LegacyBoot (\r |
| 75 | LegacyBios,\r |
| 76 | (BBS_BBS_DEVICE_PATH *) Option->DevicePath,\r |
| 77 | Option->LoadOptionsSize,\r |
| 78 | Option->LoadOptions\r |
| 79 | );\r |
| 80 | }\r |
| 81 | \r |
| 82 | EFI_STATUS\r |
| 83 | BdsLibBootViaBootOption (\r |
| 84 | IN BDS_COMMON_OPTION * Option,\r |
| 85 | IN EFI_DEVICE_PATH_PROTOCOL * DevicePath,\r |
| 86 | OUT UINTN *ExitDataSize,\r |
| 87 | OUT CHAR16 **ExitData OPTIONAL\r |
| 88 | )\r |
| 89 | /*++\r |
| 90 | \r |
| 91 | Routine Description:\r |
| 92 | \r |
| 93 | Process the boot option follow the EFI 1.1 specification and\r |
| 94 | special treat the legacy boot option with BBS_DEVICE_PATH.\r |
| 95 | \r |
| 96 | Arguments:\r |
| 97 | \r |
| 98 | Option - The boot option need to be processed\r |
| 99 | \r |
| 100 | DevicePath - The device path which describe where to load\r |
| 101 | the boot image or the legcy BBS device path\r |
| 102 | to boot the legacy OS\r |
| 103 | \r |
| 104 | ExitDataSize - Returned directly from gBS->StartImage ()\r |
| 105 | \r |
| 106 | ExitData - Returned directly from gBS->StartImage ()\r |
| 107 | \r |
| 108 | Returns:\r |
| 109 | \r |
| 110 | EFI_SUCCESS - Status from gBS->StartImage (),\r |
| 111 | or BdsBootByDiskSignatureAndPartition ()\r |
| 112 | \r |
| 113 | EFI_NOT_FOUND - If the Device Path is not found in the system\r |
| 114 | \r |
| 115 | --*/\r |
| 116 | {\r |
| 117 | EFI_STATUS Status;\r |
| 118 | EFI_HANDLE Handle;\r |
| 119 | EFI_HANDLE ImageHandle;\r |
| 120 | EFI_DEVICE_PATH_PROTOCOL *TempDevicePath;\r |
| 121 | EFI_DEVICE_PATH_PROTOCOL *FilePath;\r |
| 122 | EFI_LOADED_IMAGE_PROTOCOL *ImageInfo;\r |
| 123 | EFI_BLOCK_IO_PROTOCOL *BlkIo;\r |
| 124 | VOID *Buffer;\r |
| 125 | \r |
| 126 | //\r |
| 127 | // Record the performance data for End of BDS\r |
| 128 | //\r |
| 129 | PERF_END (0, BDS_TOK, NULL, 0);\r |
| 130 | \r |
| 131 | *ExitDataSize = 0;\r |
| 132 | *ExitData = NULL;\r |
| 133 | \r |
| 134 | //\r |
| 135 | // Notes: put EFI64 ROM Shadow Solution\r |
| 136 | //\r |
| 137 | EFI64_SHADOW_ALL_LEGACY_ROM ();\r |
| 138 | \r |
| 139 | //\r |
| 140 | // If it's Device Path that starts with a hard drive path,\r |
| 141 | // this routine will do the booting.\r |
| 142 | //\r |
| 143 | Status = BdsBootByDiskSignatureAndPartition (\r |
| 144 | Option,\r |
| 145 | (HARDDRIVE_DEVICE_PATH *) DevicePath,\r |
| 146 | Option->LoadOptionsSize,\r |
| 147 | Option->LoadOptions,\r |
| 148 | ExitDataSize,\r |
| 149 | ExitData\r |
| 150 | );\r |
| 151 | if (!EFI_ERROR (Status)) {\r |
| 152 | //\r |
| 153 | // If we found a disk signature and partition device path return success\r |
| 154 | //\r |
| 155 | return EFI_SUCCESS;\r |
| 156 | }\r |
| 157 | //\r |
| 158 | // Signal the EFI_EVENT_SIGNAL_READY_TO_BOOT event\r |
| 159 | //\r |
| 160 | EfiSignalEventReadyToBoot ();\r |
| 161 | \r |
| 162 | //\r |
| 163 | // Set Boot Current\r |
| 164 | //\r |
| 165 | gRT->SetVariable (\r |
| 166 | L"BootCurrent",\r |
| 167 | &gEfiGlobalVariableGuid,\r |
| 168 | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,\r |
| 169 | sizeof (UINT16),\r |
| 170 | &Option->BootCurrent\r |
| 171 | );\r |
| 172 | \r |
| 173 | if ((DevicePathType (Option->DevicePath) == BBS_DEVICE_PATH) &&\r |
| 174 | (DevicePathSubType (Option->DevicePath) == BBS_BBS_DP)\r |
| 175 | ) {\r |
| 176 | //\r |
| 177 | // Check to see if we should legacy BOOT. If yes then do the legacy boot\r |
| 178 | //\r |
| 179 | return BdsLibDoLegacyBoot (Option);\r |
| 180 | }\r |
| 181 | \r |
| 182 | DEBUG ((EFI_D_INFO | EFI_D_LOAD, "Booting EFI 1.1 way %S\n", Option->Description));\r |
| 183 | \r |
| 184 | Status = gBS->LoadImage (\r |
| 185 | TRUE,\r |
| 186 | mBdsImageHandle,\r |
| 187 | DevicePath,\r |
| 188 | NULL,\r |
| 189 | 0,\r |
| 190 | &ImageHandle\r |
| 191 | );\r |
| 192 | \r |
| 193 | //\r |
| 194 | // If we didn't find an image, we may need to load the default\r |
| 195 | // boot behavior for the device.\r |
| 196 | //\r |
| 197 | if (EFI_ERROR (Status)) {\r |
| 198 | //\r |
| 199 | // Find a Simple File System protocol on the device path. If the remaining\r |
| 200 | // device path is set to end then no Files are being specified, so try\r |
| 201 | // the removable media file name.\r |
| 202 | //\r |
| 203 | TempDevicePath = DevicePath;\r |
| 204 | Status = gBS->LocateDevicePath (\r |
| 205 | &gEfiSimpleFileSystemProtocolGuid,\r |
| 206 | &TempDevicePath,\r |
| 207 | &Handle\r |
| 208 | );\r |
| 209 | if (!EFI_ERROR (Status) && IsDevicePathEnd (TempDevicePath)) {\r |
| 210 | FilePath = FileDevicePath (Handle, EFI_REMOVABLE_MEDIA_FILE_NAME);\r |
| 211 | if (FilePath) {\r |
| 212 | //\r |
| 213 | // Issue a dummy read to the device to check for media change.\r |
| 214 | // When the removable media is changed, any Block IO read/write will\r |
| 215 | // cause the BlockIo protocol be reinstalled and EFI_MEDIA_CHANGED is\r |
| 216 | // returned. After the Block IO protocol is reinstalled, subsequent\r |
| 217 | // Block IO read/write will success.\r |
| 218 | //\r |
| 219 | Status = gBS->HandleProtocol (\r |
| 220 | Handle,\r |
| 221 | &gEfiBlockIoProtocolGuid,\r |
| 222 | (VOID **) &BlkIo\r |
| 223 | );\r |
| 224 | if (!EFI_ERROR (Status)) {\r |
| 225 | Buffer = AllocatePool (BlkIo->Media->BlockSize);\r |
| 226 | if (Buffer != NULL) {\r |
| 227 | BlkIo->ReadBlocks (\r |
| 228 | BlkIo,\r |
| 229 | BlkIo->Media->MediaId,\r |
| 230 | 0,\r |
| 231 | BlkIo->Media->BlockSize,\r |
| 232 | Buffer\r |
| 233 | );\r |
| 234 | FreePool (Buffer);\r |
| 235 | }\r |
| 236 | }\r |
| 237 | \r |
| 238 | Status = gBS->LoadImage (\r |
| 239 | TRUE,\r |
| 240 | mBdsImageHandle,\r |
| 241 | FilePath,\r |
| 242 | NULL,\r |
| 243 | 0,\r |
| 244 | &ImageHandle\r |
| 245 | );\r |
| 246 | if (EFI_ERROR (Status)) {\r |
| 247 | //\r |
| 248 | // The DevicePath failed, and it's not a valid\r |
| 249 | // removable media device.\r |
| 250 | //\r |
| 251 | goto Done;\r |
| 252 | }\r |
| 253 | }\r |
| 254 | } else {\r |
| 255 | Status = EFI_NOT_FOUND;\r |
| 256 | }\r |
| 257 | }\r |
| 258 | \r |
| 259 | if (EFI_ERROR (Status)) {\r |
| 260 | //\r |
| 261 | // It there is any error from the Boot attempt exit now.\r |
| 262 | //\r |
| 263 | goto Done;\r |
| 264 | }\r |
| 265 | //\r |
| 266 | // Provide the image with it's load options\r |
| 267 | //\r |
| 268 | Status = gBS->HandleProtocol (ImageHandle, &gEfiLoadedImageProtocolGuid, &ImageInfo);\r |
| 269 | ASSERT_EFI_ERROR (Status);\r |
| 270 | \r |
| 271 | if (Option->LoadOptionsSize != 0) {\r |
| 272 | ImageInfo->LoadOptionsSize = Option->LoadOptionsSize;\r |
| 273 | ImageInfo->LoadOptions = Option->LoadOptions;\r |
| 274 | }\r |
| 275 | //\r |
| 276 | // Before calling the image, enable the Watchdog Timer for\r |
| 277 | // the 5 Minute period\r |
| 278 | //\r |
| 279 | gBS->SetWatchdogTimer (5 * 60, 0x0000, 0x00, NULL);\r |
| 280 | \r |
| 281 | Status = gBS->StartImage (ImageHandle, ExitDataSize, ExitData);\r |
| 282 | DEBUG ((EFI_D_INFO | EFI_D_LOAD, "Image Return Status = %r\n", Status));\r |
| 283 | \r |
| 284 | //\r |
| 285 | // Clear the Watchdog Timer after the image returns\r |
| 286 | //\r |
| 287 | gBS->SetWatchdogTimer (0x0000, 0x0000, 0x0000, NULL);\r |
| 288 | \r |
| 289 | Done:\r |
| 290 | //\r |
| 291 | // Clear Boot Current\r |
| 292 | //\r |
| 293 | gRT->SetVariable (\r |
| 294 | L"BootCurrent",\r |
| 295 | &gEfiGlobalVariableGuid,\r |
| 296 | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,\r |
| 297 | 0,\r |
| 298 | &Option->BootCurrent\r |
| 299 | );\r |
| 300 | \r |
| 301 | return Status;\r |
| 302 | }\r |
| 303 | \r |
| 304 | EFI_STATUS\r |
| 305 | BdsBootByDiskSignatureAndPartition (\r |
| 306 | IN BDS_COMMON_OPTION * Option,\r |
| 307 | IN HARDDRIVE_DEVICE_PATH * HardDriveDevicePath,\r |
| 308 | IN UINT32 LoadOptionsSize,\r |
| 309 | IN VOID *LoadOptions,\r |
| 310 | OUT UINTN *ExitDataSize,\r |
| 311 | OUT CHAR16 **ExitData OPTIONAL\r |
| 312 | )\r |
| 313 | /*++\r |
| 314 | \r |
| 315 | Routine Description:\r |
| 316 | \r |
| 317 | Check to see if a hard ware device path was passed in. If it was then search\r |
| 318 | all the block IO devices for the passed in hard drive device path.\r |
| 319 | \r |
| 320 | Arguments:\r |
| 321 | \r |
| 322 | Option - The current processing boot option.\r |
| 323 | \r |
| 324 | HardDriveDevicePath - EFI Device Path to boot, if it starts with a hard\r |
| 325 | drive device path.\r |
| 326 | \r |
| 327 | LoadOptionsSize - Passed into gBS->StartImage ()\r |
| 328 | via the loaded image protocol.\r |
| 329 | \r |
| 330 | LoadOptions - Passed into gBS->StartImage ()\r |
| 331 | via the loaded image protocol.\r |
| 332 | \r |
| 333 | ExitDataSize - returned directly from gBS->StartImage ()\r |
| 334 | \r |
| 335 | ExitData - returned directly from gBS->StartImage ()\r |
| 336 | \r |
| 337 | Returns:\r |
| 338 | \r |
| 339 | EFI_SUCCESS - Status from gBS->StartImage (),\r |
| 340 | or BootByDiskSignatureAndPartition ()\r |
| 341 | \r |
| 342 | EFI_NOT_FOUND - If the Device Path is not found in the system\r |
| 343 | \r |
| 344 | --*/\r |
| 345 | {\r |
| 346 | EFI_STATUS Status;\r |
| 347 | UINTN BlockIoHandleCount;\r |
| 348 | EFI_HANDLE *BlockIoBuffer;\r |
| 349 | EFI_DEVICE_PATH_PROTOCOL *BlockIoDevicePath;\r |
| 350 | EFI_DEVICE_PATH_PROTOCOL *BlockIoHdDevicePath;\r |
| 351 | HARDDRIVE_DEVICE_PATH *TmpHdPath;\r |
| 352 | EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r |
| 353 | EFI_DEVICE_PATH_PROTOCOL *NewDevicePath;\r |
| 354 | UINTN Index;\r |
| 355 | BOOLEAN DevicePathMatch;\r |
| 356 | HARDDRIVE_DEVICE_PATH *TempPath;\r |
| 357 | \r |
| 358 | *ExitDataSize = 0;\r |
| 359 | *ExitData = NULL;\r |
| 360 | \r |
| 361 | if ( !((DevicePathType (&HardDriveDevicePath->Header) == MEDIA_DEVICE_PATH) &&\r |
| 362 | (DevicePathSubType (&HardDriveDevicePath->Header) == MEDIA_HARDDRIVE_DP))\r |
| 363 | ) {\r |
| 364 | //\r |
| 365 | // If the HardDriveDevicePath does not start with a Hard Drive Device Path\r |
| 366 | // exit.\r |
| 367 | //\r |
| 368 | return EFI_NOT_FOUND;\r |
| 369 | }\r |
| 370 | //\r |
| 371 | // The boot device have already been connected\r |
| 372 | //\r |
| 373 | Status = gBS->LocateHandleBuffer (ByProtocol, &gEfiBlockIoProtocolGuid, NULL, &BlockIoHandleCount, &BlockIoBuffer);\r |
| 374 | if (EFI_ERROR (Status) || BlockIoHandleCount == 0) {\r |
| 375 | //\r |
| 376 | // If there was an error or there are no device handles that support\r |
| 377 | // the BLOCK_IO Protocol, then return.\r |
| 378 | //\r |
| 379 | return EFI_NOT_FOUND;\r |
| 380 | }\r |
| 381 | //\r |
| 382 | // Loop through all the device handles that support the BLOCK_IO Protocol\r |
| 383 | //\r |
| 384 | for (Index = 0; Index < BlockIoHandleCount; Index++) {\r |
| 385 | \r |
| 386 | Status = gBS->HandleProtocol (BlockIoBuffer[Index], &gEfiDevicePathProtocolGuid, (VOID *) &BlockIoDevicePath);\r |
| 387 | if (EFI_ERROR (Status) || BlockIoDevicePath == NULL) {\r |
| 388 | continue;\r |
| 389 | }\r |
| 390 | //\r |
| 391 | // Make PreviousDevicePath == the device path node before the end node\r |
| 392 | //\r |
| 393 | DevicePath = BlockIoDevicePath;\r |
| 394 | BlockIoHdDevicePath = NULL;\r |
| 395 | \r |
| 396 | //\r |
| 397 | // find HardDriver device path node\r |
| 398 | //\r |
| 399 | while (!IsDevicePathEnd (DevicePath)) {\r |
| 400 | if ((DevicePathType (DevicePath) == MEDIA_DEVICE_PATH) &&\r |
| 401 | (DevicePathSubType (DevicePath) == MEDIA_HARDDRIVE_DP)\r |
| 402 | ) {\r |
| 403 | BlockIoHdDevicePath = DevicePath;\r |
| 404 | break;\r |
| 405 | }\r |
| 406 | \r |
| 407 | DevicePath = NextDevicePathNode (DevicePath);\r |
| 408 | }\r |
| 409 | \r |
| 410 | if (BlockIoHdDevicePath == NULL) {\r |
| 411 | continue;\r |
| 412 | }\r |
| 413 | //\r |
| 414 | // See if the harddrive device path in blockio matches the orig Hard Drive Node\r |
| 415 | //\r |
| 416 | DevicePathMatch = FALSE;\r |
| 417 | \r |
| 418 | TmpHdPath = (HARDDRIVE_DEVICE_PATH *) BlockIoHdDevicePath;\r |
| 419 | TempPath = (HARDDRIVE_DEVICE_PATH *) BdsLibUnpackDevicePath ((EFI_DEVICE_PATH_PROTOCOL *) HardDriveDevicePath);\r |
| 420 | \r |
| 421 | //\r |
| 422 | // Only several fields will be checked. NOT whole NODE\r |
| 423 | //\r |
| 424 | if ( TmpHdPath->PartitionNumber == TempPath->PartitionNumber &&\r |
| 425 | TmpHdPath->MBRType == TempPath->MBRType &&\r |
| 426 | TmpHdPath->SignatureType == TempPath->SignatureType &&\r |
| 427 | CompareGuid ((EFI_GUID *) TmpHdPath->Signature, (EFI_GUID *) TempPath->Signature)) {\r |
| 428 | //\r |
| 429 | // Get the matched device path\r |
| 430 | //\r |
| 431 | DevicePathMatch = TRUE;\r |
| 432 | }\r |
| 433 | //\r |
| 434 | // Only do the boot, when devicepath match\r |
| 435 | //\r |
| 436 | if (DevicePathMatch) {\r |
| 437 | //\r |
| 438 | // Combine the Block IO and Hard Drive Device path together and try\r |
| 439 | // to boot from it.\r |
| 440 | //\r |
| 441 | DevicePath = NextDevicePathNode ((EFI_DEVICE_PATH_PROTOCOL *) HardDriveDevicePath);\r |
| 442 | NewDevicePath = AppendDevicePath (BlockIoDevicePath, DevicePath);\r |
| 443 | \r |
| 444 | //\r |
| 445 | // Recursive boot with new device path\r |
| 446 | //\r |
| 447 | Status = BdsLibBootViaBootOption (Option, NewDevicePath, ExitDataSize, ExitData);\r |
| 448 | if (!EFI_ERROR (Status)) {\r |
| 449 | break;\r |
| 450 | }\r |
| 451 | }\r |
| 452 | }\r |
| 453 | \r |
| 454 | FreePool (BlockIoBuffer);\r |
| 455 | return Status;\r |
| 456 | }\r |
| 457 | \r |
| 458 | EFI_STATUS\r |
| 459 | BdsLibDeleteOptionFromHandle (\r |
| 460 | IN EFI_HANDLE Handle\r |
| 461 | )\r |
| 462 | /*++\r |
| 463 | \r |
| 464 | Routine Description:\r |
| 465 | \r |
| 466 | Delete the boot option associated with the handle passed in\r |
| 467 | \r |
| 468 | Arguments:\r |
| 469 | \r |
| 470 | Handle - The handle which present the device path to create boot option\r |
| 471 | \r |
| 472 | Returns:\r |
| 473 | \r |
| 474 | EFI_SUCCESS - Delete the boot option success\r |
| 475 | \r |
| 476 | EFI_NOT_FOUND - If the Device Path is not found in the system\r |
| 477 | \r |
| 478 | EFI_OUT_OF_RESOURCES - Lack of memory resource\r |
| 479 | \r |
| 480 | Other - Error return value from SetVariable()\r |
| 481 | \r |
| 482 | --*/\r |
| 483 | {\r |
| 484 | UINT16 *BootOrder;\r |
| 485 | UINT8 *BootOptionVar;\r |
| 486 | UINTN BootOrderSize;\r |
| 487 | UINTN BootOptionSize;\r |
| 488 | EFI_STATUS Status;\r |
| 489 | UINTN Index;\r |
| 490 | UINT16 BootOption[BOOT_OPTION_MAX_CHAR];\r |
| 491 | UINTN DevicePathSize;\r |
| 492 | UINTN OptionDevicePathSize;\r |
| 493 | EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r |
| 494 | EFI_DEVICE_PATH_PROTOCOL *OptionDevicePath;\r |
| 495 | UINT8 *TempPtr;\r |
| 496 | CHAR16 *Description;\r |
| 497 | \r |
| 498 | Status = EFI_SUCCESS;\r |
| 499 | BootOrder = NULL;\r |
| 500 | BootOrderSize = 0;\r |
| 501 | \r |
| 502 | BootOrder = BdsLibGetVariableAndSize (\r |
| 503 | L"BootOrder",\r |
| 504 | &gEfiGlobalVariableGuid,\r |
| 505 | &BootOrderSize\r |
| 506 | );\r |
| 507 | if (NULL == BootOrder) {\r |
| 508 | return EFI_NOT_FOUND;\r |
| 509 | }\r |
| 510 | \r |
| 511 | DevicePath = DevicePathFromHandle (Handle);\r |
| 512 | if (DevicePath == NULL) {\r |
| 513 | return EFI_NOT_FOUND;\r |
| 514 | }\r |
| 515 | DevicePathSize = GetDevicePathSize (DevicePath);\r |
| 516 | \r |
| 517 | Index = 0;\r |
| 518 | while (Index < BootOrderSize / sizeof (UINT16)) {\r |
| 519 | UnicodeSPrint (BootOption, sizeof (BootOption), L"Boot%04x", BootOrder[Index]);\r |
| 520 | BootOptionVar = BdsLibGetVariableAndSize (\r |
| 521 | BootOption,\r |
| 522 | &gEfiGlobalVariableGuid,\r |
| 523 | &BootOptionSize\r |
| 524 | );\r |
| 525 | if (NULL == BootOptionVar) {\r |
| 526 | FreePool (BootOrder);\r |
| 527 | return EFI_OUT_OF_RESOURCES;\r |
| 528 | }\r |
| 529 | \r |
| 530 | TempPtr = BootOptionVar;\r |
| 531 | TempPtr += sizeof (UINT32) + sizeof (UINT16);\r |
| 532 | Description = (CHAR16 *) TempPtr;\r |
| 533 | TempPtr += StrSize ((CHAR16 *) TempPtr);\r |
| 534 | OptionDevicePath = (EFI_DEVICE_PATH_PROTOCOL *) TempPtr;\r |
| 535 | OptionDevicePathSize = GetDevicePathSize (OptionDevicePath);\r |
| 536 | \r |
| 537 | //\r |
| 538 | // Check whether the device path match\r |
| 539 | //\r |
| 540 | if ((OptionDevicePathSize == DevicePathSize) &&\r |
| 541 | (CompareMem (DevicePath, OptionDevicePath, DevicePathSize) == 0)) {\r |
| 542 | BdsDeleteBootOption (BootOrder[Index], BootOrder, &BootOrderSize);\r |
| 543 | FreePool (BootOptionVar);\r |
| 544 | break;\r |
| 545 | }\r |
| 546 | \r |
| 547 | FreePool (BootOptionVar);\r |
| 548 | Index++;\r |
| 549 | }\r |
| 550 | \r |
| 551 | Status = gRT->SetVariable (\r |
| 552 | L"BootOrder",\r |
| 553 | &gEfiGlobalVariableGuid,\r |
| 554 | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,\r |
| 555 | BootOrderSize,\r |
| 556 | BootOrder\r |
| 557 | );\r |
| 558 | \r |
| 559 | FreePool (BootOrder);\r |
| 560 | \r |
| 561 | return Status;\r |
| 562 | }\r |
| 563 | \r |
| 564 | EFI_STATUS\r |
| 565 | BdsDeleteAllInvalidEfiBootOption (\r |
| 566 | VOID\r |
| 567 | )\r |
| 568 | /*++\r |
| 569 | \r |
| 570 | Routine Description:\r |
| 571 | \r |
| 572 | Delete all invalid EFI boot options. The probable invalid boot option could\r |
| 573 | be Removable media or Network boot device.\r |
| 574 | \r |
| 575 | Arguments:\r |
| 576 | \r |
| 577 | VOID\r |
| 578 | \r |
| 579 | Returns:\r |
| 580 | \r |
| 581 | EFI_SUCCESS - Delete all invalid boot option success\r |
| 582 | \r |
| 583 | EFI_NOT_FOUND - Variable "BootOrder" is not found\r |
| 584 | \r |
| 585 | EFI_OUT_OF_RESOURCES - Lack of memory resource\r |
| 586 | \r |
| 587 | Other - Error return value from SetVariable()\r |
| 588 | \r |
| 589 | --*/\r |
| 590 | {\r |
| 591 | UINT16 *BootOrder;\r |
| 592 | UINT8 *BootOptionVar;\r |
| 593 | UINTN BootOrderSize;\r |
| 594 | UINTN BootOptionSize;\r |
| 595 | EFI_STATUS Status;\r |
| 596 | UINTN Index;\r |
| 597 | UINTN Index2;\r |
| 598 | UINT16 BootOption[BOOT_OPTION_MAX_CHAR];\r |
| 599 | UINTN OptionDevicePathSize;\r |
| 600 | EFI_DEVICE_PATH_PROTOCOL *TempDevicePath;\r |
| 601 | EFI_DEVICE_PATH_PROTOCOL *LastDeviceNode;\r |
| 602 | EFI_DEVICE_PATH_PROTOCOL *OptionDevicePath;\r |
| 603 | UINT8 *TempPtr;\r |
| 604 | CHAR16 *Description;\r |
| 605 | EFI_HANDLE Handle;\r |
| 606 | BOOLEAN NeedDelete;\r |
| 607 | \r |
| 608 | Status = EFI_SUCCESS;\r |
| 609 | BootOrder = NULL;\r |
| 610 | BootOrderSize = 0;\r |
| 611 | \r |
| 612 | BootOrder = BdsLibGetVariableAndSize (\r |
| 613 | L"BootOrder",\r |
| 614 | &gEfiGlobalVariableGuid,\r |
| 615 | &BootOrderSize\r |
| 616 | );\r |
| 617 | if (NULL == BootOrder) {\r |
| 618 | return EFI_NOT_FOUND;\r |
| 619 | }\r |
| 620 | \r |
| 621 | Index = 0;\r |
| 622 | while (Index < BootOrderSize / sizeof (UINT16)) {\r |
| 623 | UnicodeSPrint (BootOption, sizeof (BootOption), L"Boot%04x", BootOrder[Index]);\r |
| 624 | BootOptionVar = BdsLibGetVariableAndSize (\r |
| 625 | BootOption,\r |
| 626 | &gEfiGlobalVariableGuid,\r |
| 627 | &BootOptionSize\r |
| 628 | );\r |
| 629 | if (NULL == BootOptionVar) {\r |
| 630 | FreePool (BootOrder);\r |
| 631 | return EFI_OUT_OF_RESOURCES;\r |
| 632 | }\r |
| 633 | \r |
| 634 | TempPtr = BootOptionVar;\r |
| 635 | TempPtr += sizeof (UINT32) + sizeof (UINT16);\r |
| 636 | Description = (CHAR16 *) TempPtr;\r |
| 637 | TempPtr += StrSize ((CHAR16 *) TempPtr);\r |
| 638 | OptionDevicePath = (EFI_DEVICE_PATH_PROTOCOL *) TempPtr;\r |
| 639 | OptionDevicePathSize = GetDevicePathSize (OptionDevicePath);\r |
| 640 | \r |
| 641 | //\r |
| 642 | // Skip legacy boot option (BBS boot device)\r |
| 643 | //\r |
| 644 | if ((DevicePathType (OptionDevicePath) == BBS_DEVICE_PATH) &&\r |
| 645 | (DevicePathSubType (OptionDevicePath) == BBS_BBS_DP)) {\r |
| 646 | FreePool (BootOptionVar);\r |
| 647 | Index++;\r |
| 648 | continue;\r |
| 649 | }\r |
| 650 | \r |
| 651 | TempDevicePath = OptionDevicePath;\r |
| 652 | LastDeviceNode = OptionDevicePath;\r |
| 653 | while (!EfiIsDevicePathEnd (TempDevicePath)) {\r |
| 654 | LastDeviceNode = TempDevicePath;\r |
| 655 | TempDevicePath = EfiNextDevicePathNode (TempDevicePath);\r |
| 656 | }\r |
| 657 | //\r |
| 658 | // Skip the boot option that point to a file, since the device path in\r |
| 659 | // removable media boot option doesn't contains a file name.\r |
| 660 | //\r |
| 661 | if (((DevicePathType (LastDeviceNode) == MEDIA_DEVICE_PATH) &&\r |
| 662 | (DevicePathSubType (LastDeviceNode) == MEDIA_FILEPATH_DP)) ||\r |
| 663 | //\r |
| 664 | // Skip boot option for internal Shell, it's always valid\r |
| 665 | //\r |
| 666 | (EfiGetNameGuidFromFwVolDevicePathNode ((MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *) LastDeviceNode) != NULL)) {\r |
| 667 | FreePool (BootOptionVar);\r |
| 668 | Index++;\r |
| 669 | continue;\r |
| 670 | }\r |
| 671 | \r |
| 672 | NeedDelete = TRUE;\r |
| 673 | //\r |
| 674 | // Check if it's a valid boot option for removable media\r |
| 675 | //\r |
| 676 | TempDevicePath = OptionDevicePath;\r |
| 677 | Status = gBS->LocateDevicePath (\r |
| 678 | &gEfiSimpleFileSystemProtocolGuid,\r |
| 679 | &TempDevicePath,\r |
| 680 | &Handle\r |
| 681 | );\r |
| 682 | if (!EFI_ERROR (Status)) {\r |
| 683 | NeedDelete = FALSE;\r |
| 684 | }\r |
| 685 | //\r |
| 686 | // Check if it's a valid boot option for network boot device\r |
| 687 | //\r |
| 688 | TempDevicePath = OptionDevicePath;\r |
| 689 | Status = gBS->LocateDevicePath (\r |
| 690 | &gEfiLoadFileProtocolGuid,\r |
| 691 | &TempDevicePath,\r |
| 692 | &Handle\r |
| 693 | );\r |
| 694 | if (!EFI_ERROR (Status)) {\r |
| 695 | NeedDelete = FALSE;\r |
| 696 | }\r |
| 697 | \r |
| 698 | if (NeedDelete) {\r |
| 699 | //\r |
| 700 | // Delete this invalid boot option "Boot####"\r |
| 701 | //\r |
| 702 | Status = gRT->SetVariable (\r |
| 703 | BootOption,\r |
| 704 | &gEfiGlobalVariableGuid,\r |
| 705 | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,\r |
| 706 | 0,\r |
| 707 | NULL\r |
| 708 | );\r |
| 709 | //\r |
| 710 | // Mark this boot option in boot order as deleted\r |
| 711 | //\r |
| 712 | BootOrder[Index] = 0xffff;\r |
| 713 | }\r |
| 714 | \r |
| 715 | FreePool (BootOptionVar);\r |
| 716 | Index++;\r |
| 717 | }\r |
| 718 | \r |
| 719 | //\r |
| 720 | // Adjust boot order array\r |
| 721 | //\r |
| 722 | Index2 = 0;\r |
| 723 | for (Index = 0; Index < BootOrderSize / sizeof (UINT16); Index++) {\r |
| 724 | if (BootOrder[Index] != 0xffff) {\r |
| 725 | BootOrder[Index2] = BootOrder[Index];\r |
| 726 | Index2 ++;\r |
| 727 | }\r |
| 728 | }\r |
| 729 | Status = gRT->SetVariable (\r |
| 730 | L"BootOrder",\r |
| 731 | &gEfiGlobalVariableGuid,\r |
| 732 | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,\r |
| 733 | Index2 * sizeof (UINT16),\r |
| 734 | BootOrder\r |
| 735 | );\r |
| 736 | \r |
| 737 | FreePool (BootOrder);\r |
| 738 | \r |
| 739 | return Status;\r |
| 740 | }\r |
| 741 | \r |
| 742 | EFI_STATUS\r |
| 743 | BdsLibEnumerateAllBootOption (\r |
| 744 | IN OUT LIST_ENTRY *BdsBootOptionList\r |
| 745 | )\r |
| 746 | /*++\r |
| 747 | \r |
| 748 | Routine Description:\r |
| 749 | \r |
| 750 | This function will enumerate all possible boot device in the system,\r |
| 751 | it will only excute once of every boot.\r |
| 752 | \r |
| 753 | Arguments:\r |
| 754 | \r |
| 755 | BdsBootOptionList - The header of the link list which indexed all\r |
| 756 | current boot options\r |
| 757 | \r |
| 758 | Returns:\r |
| 759 | \r |
| 760 | EFI_SUCCESS - Finished all the boot device enumerate and create\r |
| 761 | the boot option base on that boot device\r |
| 762 | \r |
| 763 | --*/\r |
| 764 | {\r |
| 765 | EFI_STATUS Status;\r |
| 766 | UINT16 BootOptionNumber;\r |
| 767 | UINTN NumberFileSystemHandles;\r |
| 768 | EFI_HANDLE *FileSystemHandles;\r |
| 769 | EFI_BLOCK_IO_PROTOCOL *BlkIo;\r |
| 770 | UINTN Index;\r |
| 771 | UINTN NumberLoadFileHandles;\r |
| 772 | EFI_HANDLE *LoadFileHandles;\r |
| 773 | VOID *ProtocolInstance;\r |
| 774 | EFI_FIRMWARE_VOLUME_PROTOCOL *Fv;\r |
| 775 | UINTN FvHandleCount;\r |
| 776 | EFI_HANDLE *FvHandleBuffer;\r |
| 777 | EFI_FV_FILETYPE Type;\r |
| 778 | UINTN Size;\r |
| 779 | EFI_FV_FILE_ATTRIBUTES Attributes;\r |
| 780 | UINT32 AuthenticationStatus;\r |
| 781 | EFI_DEVICE_PATH_PROTOCOL *FilePath;\r |
| 782 | EFI_HANDLE ImageHandle;\r |
| 783 | EFI_LOADED_IMAGE_PROTOCOL *ImageInfo;\r |
| 784 | BOOLEAN NeedDelete;\r |
| 785 | \r |
| 786 | BootOptionNumber = 0;\r |
| 787 | \r |
| 788 | //\r |
| 789 | // If the boot device enumerate happened, just get the boot\r |
| 790 | // device from the boot order variable\r |
| 791 | //\r |
| 792 | if (mEnumBootDevice) {\r |
| 793 | BdsLibBuildOptionFromVar (BdsBootOptionList, L"BootOrder");\r |
| 794 | return EFI_SUCCESS;\r |
| 795 | }\r |
| 796 | //\r |
| 797 | // Notes: this dirty code is to get the legacy boot option from the\r |
| 798 | // BBS table and create to variable as the EFI boot option, it should\r |
| 799 | // be removed after the CSM can provide legacy boot option directly\r |
| 800 | //\r |
| 801 | REFRESH_LEGACY_BOOT_OPTIONS;\r |
| 802 | \r |
| 803 | //\r |
| 804 | // Delete invalid boot option\r |
| 805 | //\r |
| 806 | BdsDeleteAllInvalidEfiBootOption ();\r |
| 807 | //\r |
| 808 | // Parse removable media\r |
| 809 | //\r |
| 810 | gBS->LocateHandleBuffer (\r |
| 811 | ByProtocol,\r |
| 812 | &gEfiSimpleFileSystemProtocolGuid,\r |
| 813 | NULL,\r |
| 814 | &NumberFileSystemHandles,\r |
| 815 | &FileSystemHandles\r |
| 816 | );\r |
| 817 | for (Index = 0; Index < NumberFileSystemHandles; Index++) {\r |
| 818 | Status = gBS->HandleProtocol (\r |
| 819 | FileSystemHandles[Index],\r |
| 820 | &gEfiBlockIoProtocolGuid,\r |
| 821 | (VOID **) &BlkIo\r |
| 822 | );\r |
| 823 | if (!EFI_ERROR (Status)) {\r |
| 824 | if (!BlkIo->Media->RemovableMedia) {\r |
| 825 | //\r |
| 826 | // If the file system handle supports a BlkIo protocol,\r |
| 827 | // skip the removable media devices\r |
| 828 | //\r |
| 829 | continue;\r |
| 830 | }\r |
| 831 | }\r |
| 832 | \r |
| 833 | //\r |
| 834 | // Do the removable Media thing. \EFI\BOOT\boot{machinename}.EFI\r |
| 835 | // machinename is ia32, ia64, x64, ...\r |
| 836 | //\r |
| 837 | FilePath = FileDevicePath (FileSystemHandles[Index], EFI_REMOVABLE_MEDIA_FILE_NAME);\r |
| 838 | NeedDelete = TRUE;\r |
| 839 | Status = gBS->LoadImage (\r |
| 840 | TRUE,\r |
| 841 | mBdsImageHandle,\r |
| 842 | FilePath,\r |
| 843 | NULL,\r |
| 844 | 0,\r |
| 845 | &ImageHandle\r |
| 846 | );\r |
| 847 | if (!EFI_ERROR(Status)) {\r |
| 848 | //\r |
| 849 | // Verify the image is a EFI application (and not a driver)\r |
| 850 | //\r |
| 851 | Status = gBS->HandleProtocol (ImageHandle, &gEfiLoadedImageProtocolGuid, (VOID **) &ImageInfo);\r |
| 852 | ASSERT (!EFI_ERROR(Status));\r |
| 853 | \r |
| 854 | if (ImageInfo->ImageCodeType == EfiLoaderCode) {\r |
| 855 | NeedDelete = FALSE;\r |
| 856 | }\r |
| 857 | }\r |
| 858 | \r |
| 859 | if (NeedDelete) {\r |
| 860 | //\r |
| 861 | // No such file or the file is not a EFI application, delete this boot option\r |
| 862 | //\r |
| 863 | BdsLibDeleteOptionFromHandle (FileSystemHandles[Index]);\r |
| 864 | } else {\r |
| 865 | BdsLibBuildOptionFromHandle (FileSystemHandles[Index], BdsBootOptionList);\r |
| 866 | BootOptionNumber++;\r |
| 867 | }\r |
| 868 | }\r |
| 869 | \r |
| 870 | if (NumberFileSystemHandles) {\r |
| 871 | FreePool (FileSystemHandles);\r |
| 872 | }\r |
| 873 | //\r |
| 874 | // Parse Network Boot Device\r |
| 875 | //\r |
| 876 | gBS->LocateHandleBuffer (\r |
| 877 | ByProtocol,\r |
| 878 | &gEfiSimpleNetworkProtocolGuid,\r |
| 879 | NULL,\r |
| 880 | &NumberLoadFileHandles,\r |
| 881 | &LoadFileHandles\r |
| 882 | );\r |
| 883 | for (Index = 0; Index < NumberLoadFileHandles; Index++) {\r |
| 884 | Status = gBS->HandleProtocol (\r |
| 885 | LoadFileHandles[Index],\r |
| 886 | &gEfiLoadFileProtocolGuid,\r |
| 887 | (VOID **) &ProtocolInstance\r |
| 888 | );\r |
| 889 | if (EFI_ERROR (Status)) {\r |
| 890 | continue;\r |
| 891 | }\r |
| 892 | \r |
| 893 | BdsLibBuildOptionFromHandle (LoadFileHandles[Index], BdsBootOptionList);\r |
| 894 | BootOptionNumber++;\r |
| 895 | }\r |
| 896 | \r |
| 897 | if (NumberLoadFileHandles) {\r |
| 898 | FreePool (LoadFileHandles);\r |
| 899 | }\r |
| 900 | //\r |
| 901 | // Check if we have on flash shell\r |
| 902 | //\r |
| 903 | gBS->LocateHandleBuffer (\r |
| 904 | ByProtocol,\r |
| 905 | &gEfiFirmwareVolumeProtocolGuid,\r |
| 906 | NULL,\r |
| 907 | &FvHandleCount,\r |
| 908 | &FvHandleBuffer\r |
| 909 | );\r |
| 910 | for (Index = 0; Index < FvHandleCount; Index++) {\r |
| 911 | gBS->HandleProtocol (\r |
| 912 | FvHandleBuffer[Index],\r |
| 913 | &gEfiFirmwareVolumeProtocolGuid,\r |
| 914 | (VOID **) &Fv\r |
| 915 | );\r |
| 916 | \r |
| 917 | Status = Fv->ReadFile (\r |
| 918 | Fv,\r |
| 919 | &gEfiShellFileGuid,\r |
| 920 | NULL,\r |
| 921 | &Size,\r |
| 922 | &Type,\r |
| 923 | &Attributes,\r |
| 924 | &AuthenticationStatus\r |
| 925 | );\r |
| 926 | if (EFI_ERROR (Status)) {\r |
| 927 | //\r |
| 928 | // Skip if no shell file in the FV\r |
| 929 | //\r |
| 930 | continue;\r |
| 931 | }\r |
| 932 | //\r |
| 933 | // Build the shell boot option\r |
| 934 | //\r |
| 935 | BdsLibBuildOptionFromShell (FvHandleBuffer[Index], BdsBootOptionList);\r |
| 936 | BootOptionNumber++;\r |
| 937 | }\r |
| 938 | \r |
| 939 | if (FvHandleCount) {\r |
| 940 | FreePool (FvHandleBuffer);\r |
| 941 | }\r |
| 942 | //\r |
| 943 | // Make sure every boot only have one time\r |
| 944 | // boot device enumerate\r |
| 945 | //\r |
| 946 | BdsLibBuildOptionFromVar (BdsBootOptionList, L"BootOrder");\r |
| 947 | mEnumBootDevice = TRUE;\r |
| 948 | \r |
| 949 | return EFI_SUCCESS;\r |
| 950 | }\r |
| 951 | \r |
| 952 | VOID\r |
| 953 | BdsLibBuildOptionFromHandle (\r |
| 954 | IN EFI_HANDLE Handle,\r |
| 955 | IN LIST_ENTRY *BdsBootOptionList\r |
| 956 | )\r |
| 957 | /*++\r |
| 958 | \r |
| 959 | Routine Description:\r |
| 960 | \r |
| 961 | Build the boot option with the handle parsed in\r |
| 962 | \r |
| 963 | Arguments:\r |
| 964 | \r |
| 965 | Handle - The handle which present the device path to create boot option\r |
| 966 | \r |
| 967 | BdsBootOptionList - The header of the link list which indexed all current\r |
| 968 | boot options\r |
| 969 | \r |
| 970 | Returns:\r |
| 971 | \r |
| 972 | VOID\r |
| 973 | \r |
| 974 | --*/\r |
| 975 | {\r |
| 976 | EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r |
| 977 | CHAR16 *TempString;\r |
| 978 | \r |
| 979 | DevicePath = DevicePathFromHandle (Handle);\r |
| 980 | TempString = DevicePathToStr (DevicePath);\r |
| 981 | \r |
| 982 | //\r |
| 983 | // Create and register new boot option\r |
| 984 | //\r |
| 985 | BdsLibRegisterNewOption (BdsBootOptionList, DevicePath, TempString, L"BootOrder");\r |
| 986 | }\r |
| 987 | \r |
| 988 | VOID\r |
| 989 | BdsLibBuildOptionFromShell (\r |
| 990 | IN EFI_HANDLE Handle,\r |
| 991 | IN OUT LIST_ENTRY *BdsBootOptionList\r |
| 992 | )\r |
| 993 | /*++\r |
| 994 | \r |
| 995 | Routine Description:\r |
| 996 | \r |
| 997 | Build the on flash shell boot option with the handle parsed in\r |
| 998 | \r |
| 999 | Arguments:\r |
| 1000 | \r |
| 1001 | Handle - The handle which present the device path to create on flash shell\r |
| 1002 | boot option\r |
| 1003 | \r |
| 1004 | BdsBootOptionList - The header of the link list which indexed all current\r |
| 1005 | boot options\r |
| 1006 | \r |
| 1007 | Returns:\r |
| 1008 | \r |
| 1009 | None\r |
| 1010 | \r |
| 1011 | --*/\r |
| 1012 | {\r |
| 1013 | EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r |
| 1014 | MEDIA_FW_VOL_FILEPATH_DEVICE_PATH ShellNode;\r |
| 1015 | \r |
| 1016 | DevicePath = DevicePathFromHandle (Handle);\r |
| 1017 | \r |
| 1018 | //\r |
| 1019 | // Build the shell device path\r |
| 1020 | //\r |
| 1021 | EfiInitializeFwVolDevicepathNode (&ShellNode, &gEfiShellFileGuid);\r |
| 1022 | DevicePath = AppendDevicePathNode (DevicePath, (EFI_DEVICE_PATH_PROTOCOL *) &ShellNode);\r |
| 1023 | \r |
| 1024 | //\r |
| 1025 | // Create and register the shell boot option\r |
| 1026 | //\r |
| 1027 | BdsLibRegisterNewOption (BdsBootOptionList, DevicePath, L"Internal EFI Shell", L"BootOrder");\r |
| 1028 | \r |
| 1029 | }\r |
| 1030 | \r |
| 1031 | VOID\r |
| 1032 | BdsLibBootNext (\r |
| 1033 | VOID\r |
| 1034 | )\r |
| 1035 | /*++\r |
| 1036 | \r |
| 1037 | Routine Description:\r |
| 1038 | \r |
| 1039 | Boot from the EFI1.1 spec defined "BootNext" variable\r |
| 1040 | \r |
| 1041 | Arguments:\r |
| 1042 | \r |
| 1043 | None\r |
| 1044 | \r |
| 1045 | Returns:\r |
| 1046 | \r |
| 1047 | None\r |
| 1048 | \r |
| 1049 | --*/\r |
| 1050 | {\r |
| 1051 | UINT16 *BootNext;\r |
| 1052 | UINTN BootNextSize;\r |
| 1053 | CHAR16 Buffer[20];\r |
| 1054 | BDS_COMMON_OPTION *BootOption;\r |
| 1055 | LIST_ENTRY TempList;\r |
| 1056 | UINTN ExitDataSize;\r |
| 1057 | CHAR16 *ExitData;\r |
| 1058 | \r |
| 1059 | //\r |
| 1060 | // Init the boot option name buffer and temp link list\r |
| 1061 | //\r |
| 1062 | InitializeListHead (&TempList);\r |
| 1063 | ZeroMem (Buffer, sizeof (Buffer));\r |
| 1064 | \r |
| 1065 | BootNext = BdsLibGetVariableAndSize (\r |
| 1066 | L"BootNext",\r |
| 1067 | &gEfiGlobalVariableGuid,\r |
| 1068 | &BootNextSize\r |
| 1069 | );\r |
| 1070 | \r |
| 1071 | //\r |
| 1072 | // Clear the boot next variable first\r |
| 1073 | //\r |
| 1074 | if (BootNext != NULL) {\r |
| 1075 | gRT->SetVariable (\r |
| 1076 | L"BootNext",\r |
| 1077 | &gEfiGlobalVariableGuid,\r |
| 1078 | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,\r |
| 1079 | 0,\r |
| 1080 | BootNext\r |
| 1081 | );\r |
| 1082 | \r |
| 1083 | //\r |
| 1084 | // Start to build the boot option and try to boot\r |
| 1085 | //\r |
| 1086 | UnicodeSPrint (Buffer, sizeof (Buffer), L"Boot%04x", *BootNext);\r |
| 1087 | BootOption = BdsLibVariableToOption (&TempList, Buffer);\r |
| 1088 | BdsLibConnectDevicePath (BootOption->DevicePath);\r |
| 1089 | BdsLibBootViaBootOption (BootOption, BootOption->DevicePath, &ExitDataSize, &ExitData);\r |
| 1090 | }\r |
| 1091 | \r |
| 1092 | }\r |