1 /** @file 2 HOB Library implemenation for Dxe Phase with DebugLib dependency removed 3 4 Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR> 5 Copyright (c) 2014, Linaro Ltd. All rights reserved.<BR> 6 This program and the accompanying materials 7 are licensed and made available under the terms and conditions of the BSD License 8 which accompanies this distribution. The full text of the license may be found at 9 http://opensource.org/licenses/bsd-license.php 10 11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 13 14 **/ 15 16 #define ASSERT(Expression) \ 17 do { \ 18 if (!(Expression)) { \ 19 CpuDeadLoop (); \ 20 } \ 21 } while (FALSE) 22 23 #include <PiDxe.h> 24 25 #include <Guid/HobList.h> 26 27 #include <Library/HobLib.h> 28 #include <Library/UefiLib.h> 29 #include <Library/BaseMemoryLib.h> 30 31 VOID *mHobList = NULL; 32 33 /** 34 The constructor function caches the pointer to HOB list. 35 36 The constructor function gets the start address of HOB list from system configuration table. 37 38 @param ImageHandle The firmware allocated handle for the EFI image. 39 @param SystemTable A pointer to the EFI System Table. 40 41 @retval EFI_SUCCESS The constructor successfully gets HobList. 42 @retval Other value The constructor can't get HobList. 43 44 **/ 45 EFI_STATUS 46 EFIAPI 47 HobLibConstructor ( 48 IN EFI_HANDLE ImageHandle, 49 IN EFI_SYSTEM_TABLE *SystemTable 50 ) 51 { 52 UINTN Index; 53 54 for (Index = 0; Index < SystemTable->NumberOfTableEntries; Index++) { 55 if (CompareGuid (&gEfiHobListGuid, &(SystemTable->ConfigurationTable[Index].VendorGuid))) { 56 mHobList = SystemTable->ConfigurationTable[Index].VendorTable; 57 return EFI_SUCCESS; 58 } 59 } 60 61 return EFI_NOT_FOUND; 62 } 63 64 /** 65 Returns the pointer to the HOB list. 66 67 This function returns the pointer to first HOB in the list. 68 For PEI phase, the PEI service GetHobList() can be used to retrieve the pointer 69 to the HOB list. For the DXE phase, the HOB list pointer can be retrieved through 70 the EFI System Table by looking up theHOB list GUID in the System Configuration Table. 71 Since the System Configuration Table does not exist that the time the DXE Core is 72 launched, the DXE Core uses a global variable from the DXE Core Entry Point Library 73 to manage the pointer to the HOB list. 74 75 If the pointer to the HOB list is NULL, then ASSERT(). 76 77 @return The pointer to the HOB list. 78 79 **/ 80 VOID * 81 EFIAPI 82 GetHobList ( 83 VOID 84 ) 85 { 86 ASSERT (mHobList != NULL); 87 return mHobList; 88 } 89 90 /** 91 Returns the next instance of a HOB type from the starting HOB. 92 93 This function searches the first instance of a HOB type from the starting HOB pointer. 94 If there does not exist such HOB type from the starting HOB pointer, it will return NULL. 95 In contrast with macro GET_NEXT_HOB(), this function does not skip the starting HOB pointer 96 unconditionally: it returns HobStart back if HobStart itself meets the requirement; 97 caller is required to use GET_NEXT_HOB() if it wishes to skip current HobStart. 98 99 If HobStart is NULL, then ASSERT(). 100 101 @param Type The HOB type to return. 102 @param HobStart The starting HOB pointer to search from. 103 104 @return The next instance of a HOB type from the starting HOB. 105 106 **/ 107 VOID * 108 EFIAPI 109 GetNextHob ( 110 IN UINT16 Type, 111 IN CONST VOID *HobStart 112 ) 113 { 114 EFI_PEI_HOB_POINTERS Hob; 115 116 ASSERT (HobStart != NULL); 117 118 Hob.Raw = (UINT8 *) HobStart; 119 // 120 // Parse the HOB list until end of list or matching type is found. 121 // 122 while (!END_OF_HOB_LIST (Hob)) { 123 if (Hob.Header->HobType == Type) { 124 return Hob.Raw; 125 } 126 Hob.Raw = GET_NEXT_HOB (Hob); 127 } 128 return NULL; 129 } 130 131 /** 132 Returns the first instance of a HOB type among the whole HOB list. 133 134 This function searches the first instance of a HOB type among the whole HOB list. 135 If there does not exist such HOB type in the HOB list, it will return NULL. 136 137 If the pointer to the HOB list is NULL, then ASSERT(). 138 139 @param Type The HOB type to return. 140 141 @return The next instance of a HOB type from the starting HOB. 142 143 **/ 144 VOID * 145 EFIAPI 146 GetFirstHob ( 147 IN UINT16 Type 148 ) 149 { 150 VOID *HobList; 151 152 HobList = GetHobList (); 153 return GetNextHob (Type, HobList); 154 } 155 156 /** 157 Returns the next instance of the matched GUID HOB from the starting HOB. 158 159 This function searches the first instance of a HOB from the starting HOB pointer. 160 Such HOB should satisfy two conditions: 161 its HOB type is EFI_HOB_TYPE_GUID_EXTENSION and its GUID Name equals to the input Guid. 162 If there does not exist such HOB from the starting HOB pointer, it will return NULL. 163 Caller is required to apply GET_GUID_HOB_DATA () and GET_GUID_HOB_DATA_SIZE () 164 to extract the data section and its size information, respectively. 165 In contrast with macro GET_NEXT_HOB(), this function does not skip the starting HOB pointer 166 unconditionally: it returns HobStart back if HobStart itself meets the requirement; 167 caller is required to use GET_NEXT_HOB() if it wishes to skip current HobStart. 168 169 If Guid is NULL, then ASSERT(). 170 If HobStart is NULL, then ASSERT(). 171 172 @param Guid The GUID to match with in the HOB list. 173 @param HobStart A pointer to a Guid. 174 175 @return The next instance of the matched GUID HOB from the starting HOB. 176 177 **/ 178 VOID * 179 EFIAPI 180 GetNextGuidHob ( 181 IN CONST EFI_GUID *Guid, 182 IN CONST VOID *HobStart 183 ) 184 { 185 EFI_PEI_HOB_POINTERS GuidHob; 186 187 GuidHob.Raw = (UINT8 *) HobStart; 188 while ((GuidHob.Raw = GetNextHob (EFI_HOB_TYPE_GUID_EXTENSION, GuidHob.Raw)) != NULL) { 189 if (CompareGuid (Guid, &GuidHob.Guid->Name)) { 190 break; 191 } 192 GuidHob.Raw = GET_NEXT_HOB (GuidHob); 193 } 194 return GuidHob.Raw; 195 } 196 197 /** 198 Returns the first instance of the matched GUID HOB among the whole HOB list. 199 200 This function searches the first instance of a HOB among the whole HOB list. 201 Such HOB should satisfy two conditions: 202 its HOB type is EFI_HOB_TYPE_GUID_EXTENSION and its GUID Name equals to the input Guid. 203 If there does not exist such HOB from the starting HOB pointer, it will return NULL. 204 Caller is required to apply GET_GUID_HOB_DATA () and GET_GUID_HOB_DATA_SIZE () 205 to extract the data section and its size information, respectively. 206 207 If the pointer to the HOB list is NULL, then ASSERT(). 208 If Guid is NULL, then ASSERT(). 209 210 @param Guid The GUID to match with in the HOB list. 211 212 @return The first instance of the matched GUID HOB among the whole HOB list. 213 214 **/ 215 VOID * 216 EFIAPI 217 GetFirstGuidHob ( 218 IN CONST EFI_GUID *Guid 219 ) 220 { 221 VOID *HobList; 222 223 HobList = GetHobList (); 224 return GetNextGuidHob (Guid, HobList); 225 } 226 227 /** 228 Get the system boot mode from the HOB list. 229 230 This function returns the system boot mode information from the 231 PHIT HOB in HOB list. 232 233 If the pointer to the HOB list is NULL, then ASSERT(). 234 235 @param VOID 236 237 @return The Boot Mode. 238 239 **/ 240 EFI_BOOT_MODE 241 EFIAPI 242 GetBootModeHob ( 243 VOID 244 ) 245 { 246 EFI_HOB_HANDOFF_INFO_TABLE *HandOffHob; 247 248 HandOffHob = (EFI_HOB_HANDOFF_INFO_TABLE *) GetHobList (); 249 250 return HandOffHob->BootMode; 251 } 252 253 /** 254 Builds a HOB for a loaded PE32 module. 255 256 This function builds a HOB for a loaded PE32 module. 257 It can only be invoked during PEI phase; 258 for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase. 259 260 If ModuleName is NULL, then ASSERT(). 261 If there is no additional space for HOB creation, then ASSERT(). 262 263 @param ModuleName The GUID File Name of the module. 264 @param MemoryAllocationModule The 64 bit physical address of the module. 265 @param ModuleLength The length of the module in bytes. 266 @param EntryPoint The 64 bit physical address of the module entry point. 267 268 **/ 269 VOID 270 EFIAPI 271 BuildModuleHob ( 272 IN CONST EFI_GUID *ModuleName, 273 IN EFI_PHYSICAL_ADDRESS MemoryAllocationModule, 274 IN UINT64 ModuleLength, 275 IN EFI_PHYSICAL_ADDRESS EntryPoint 276 ) 277 { 278 // 279 // PEI HOB is read only for DXE phase 280 // 281 ASSERT (FALSE); 282 } 283 284 /** 285 Builds a HOB that describes a chunk of system memory. 286 287 This function builds a HOB that describes a chunk of system memory. 288 It can only be invoked during PEI phase; 289 for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase. 290 291 If there is no additional space for HOB creation, then ASSERT(). 292 293 @param ResourceType The type of resource described by this HOB. 294 @param ResourceAttribute The resource attributes of the memory described by this HOB. 295 @param PhysicalStart The 64 bit physical address of memory described by this HOB. 296 @param NumberOfBytes The length of the memory described by this HOB in bytes. 297 298 **/ 299 VOID 300 EFIAPI 301 BuildResourceDescriptorHob ( 302 IN EFI_RESOURCE_TYPE ResourceType, 303 IN EFI_RESOURCE_ATTRIBUTE_TYPE ResourceAttribute, 304 IN EFI_PHYSICAL_ADDRESS PhysicalStart, 305 IN UINT64 NumberOfBytes 306 ) 307 { 308 // 309 // PEI HOB is read only for DXE phase 310 // 311 ASSERT (FALSE); 312 } 313 314 /** 315 Builds a customized HOB tagged with a GUID for identification and returns 316 the start address of GUID HOB data. 317 318 This function builds a customized HOB tagged with a GUID for identification 319 and returns the start address of GUID HOB data so that caller can fill the customized data. 320 The HOB Header and Name field is already stripped. 321 It can only be invoked during PEI phase; 322 for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase. 323 324 If Guid is NULL, then ASSERT(). 325 If there is no additional space for HOB creation, then ASSERT(). 326 If DataLength > (0xFFF8 - sizeof (EFI_HOB_GUID_TYPE)), then ASSERT(). 327 HobLength is UINT16 and multiples of 8 bytes, so the max HobLength is 0xFFF8. 328 329 @param Guid The GUID to tag the customized HOB. 330 @param DataLength The size of the data payload for the GUID HOB. 331 332 @retval NULL The GUID HOB could not be allocated. 333 @retval others The start address of GUID HOB data. 334 335 **/ 336 VOID * 337 EFIAPI 338 BuildGuidHob ( 339 IN CONST EFI_GUID *Guid, 340 IN UINTN DataLength 341 ) 342 { 343 // 344 // PEI HOB is read only for DXE phase 345 // 346 ASSERT (FALSE); 347 return NULL; 348 } 349 350 /** 351 Builds a customized HOB tagged with a GUID for identification, copies the input data to the HOB 352 data field, and returns the start address of the GUID HOB data. 353 354 This function builds a customized HOB tagged with a GUID for identification and copies the input 355 data to the HOB data field and returns the start address of the GUID HOB data. It can only be 356 invoked during PEI phase; for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase. 357 The HOB Header and Name field is already stripped. 358 It can only be invoked during PEI phase; 359 for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase. 360 361 If Guid is NULL, then ASSERT(). 362 If Data is NULL and DataLength > 0, then ASSERT(). 363 If there is no additional space for HOB creation, then ASSERT(). 364 If DataLength > (0xFFF8 - sizeof (EFI_HOB_GUID_TYPE)), then ASSERT(). 365 HobLength is UINT16 and multiples of 8 bytes, so the max HobLength is 0xFFF8. 366 367 @param Guid The GUID to tag the customized HOB. 368 @param Data The data to be copied into the data field of the GUID HOB. 369 @param DataLength The size of the data payload for the GUID HOB. 370 371 @retval NULL The GUID HOB could not be allocated. 372 @retval others The start address of GUID HOB data. 373 374 **/ 375 VOID * 376 EFIAPI 377 BuildGuidDataHob ( 378 IN CONST EFI_GUID *Guid, 379 IN VOID *Data, 380 IN UINTN DataLength 381 ) 382 { 383 // 384 // PEI HOB is read only for DXE phase 385 // 386 ASSERT (FALSE); 387 return NULL; 388 } 389 390 /** 391 Builds a Firmware Volume HOB. 392 393 This function builds a Firmware Volume HOB. 394 It can only be invoked during PEI phase; 395 for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase. 396 397 If there is no additional space for HOB creation, then ASSERT(). 398 399 @param BaseAddress The base address of the Firmware Volume. 400 @param Length The size of the Firmware Volume in bytes. 401 402 **/ 403 VOID 404 EFIAPI 405 BuildFvHob ( 406 IN EFI_PHYSICAL_ADDRESS BaseAddress, 407 IN UINT64 Length 408 ) 409 { 410 // 411 // PEI HOB is read only for DXE phase 412 // 413 ASSERT (FALSE); 414 } 415 416 /** 417 Builds a EFI_HOB_TYPE_FV2 HOB. 418 419 This function builds a EFI_HOB_TYPE_FV2 HOB. 420 It can only be invoked during PEI phase; 421 for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase. 422 423 If there is no additional space for HOB creation, then ASSERT(). 424 425 @param BaseAddress The base address of the Firmware Volume. 426 @param Length The size of the Firmware Volume in bytes. 427 @param FvName The name of the Firmware Volume. 428 @param FileName The name of the file. 429 430 **/ 431 VOID 432 EFIAPI 433 BuildFv2Hob ( 434 IN EFI_PHYSICAL_ADDRESS BaseAddress, 435 IN UINT64 Length, 436 IN CONST EFI_GUID *FvName, 437 IN CONST EFI_GUID *FileName 438 ) 439 { 440 ASSERT (FALSE); 441 } 442 443 444 /** 445 Builds a Capsule Volume HOB. 446 447 This function builds a Capsule Volume HOB. 448 It can only be invoked during PEI phase; 449 for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase. 450 451 If the platform does not support Capsule Volume HOBs, then ASSERT(). 452 If there is no additional space for HOB creation, then ASSERT(). 453 454 @param BaseAddress The base address of the Capsule Volume. 455 @param Length The size of the Capsule Volume in bytes. 456 457 **/ 458 VOID 459 EFIAPI 460 BuildCvHob ( 461 IN EFI_PHYSICAL_ADDRESS BaseAddress, 462 IN UINT64 Length 463 ) 464 { 465 // 466 // PEI HOB is read only for DXE phase 467 // 468 ASSERT (FALSE); 469 } 470 471 /** 472 Builds a HOB for the CPU. 473 474 This function builds a HOB for the CPU. 475 It can only be invoked during PEI phase; 476 for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase. 477 478 If there is no additional space for HOB creation, then ASSERT(). 479 480 @param SizeOfMemorySpace The maximum physical memory addressability of the processor. 481 @param SizeOfIoSpace The maximum physical I/O addressability of the processor. 482 483 **/ 484 VOID 485 EFIAPI 486 BuildCpuHob ( 487 IN UINT8 SizeOfMemorySpace, 488 IN UINT8 SizeOfIoSpace 489 ) 490 { 491 // 492 // PEI HOB is read only for DXE phase 493 // 494 ASSERT (FALSE); 495 } 496 497 /** 498 Builds a HOB for the Stack. 499 500 This function builds a HOB for the stack. 501 It can only be invoked during PEI phase; 502 for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase. 503 504 If there is no additional space for HOB creation, then ASSERT(). 505 506 @param BaseAddress The 64 bit physical address of the Stack. 507 @param Length The length of the stack in bytes. 508 509 **/ 510 VOID 511 EFIAPI 512 BuildStackHob ( 513 IN EFI_PHYSICAL_ADDRESS BaseAddress, 514 IN UINT64 Length 515 ) 516 { 517 // 518 // PEI HOB is read only for DXE phase 519 // 520 ASSERT (FALSE); 521 } 522 523 /** 524 Builds a HOB for the BSP store. 525 526 This function builds a HOB for BSP store. 527 It can only be invoked during PEI phase; 528 for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase. 529 530 If there is no additional space for HOB creation, then ASSERT(). 531 532 @param BaseAddress The 64 bit physical address of the BSP. 533 @param Length The length of the BSP store in bytes. 534 @param MemoryType Type of memory allocated by this HOB. 535 536 **/ 537 VOID 538 EFIAPI 539 BuildBspStoreHob ( 540 IN EFI_PHYSICAL_ADDRESS BaseAddress, 541 IN UINT64 Length, 542 IN EFI_MEMORY_TYPE MemoryType 543 ) 544 { 545 // 546 // PEI HOB is read only for DXE phase 547 // 548 ASSERT (FALSE); 549 } 550 551 /** 552 Builds a HOB for the memory allocation. 553 554 This function builds a HOB for the memory allocation. 555 It can only be invoked during PEI phase; 556 for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase. 557 558 If there is no additional space for HOB creation, then ASSERT(). 559 560 @param BaseAddress The 64 bit physical address of the memory. 561 @param Length The length of the memory allocation in bytes. 562 @param MemoryType Type of memory allocated by this HOB. 563 564 **/ 565 VOID 566 EFIAPI 567 BuildMemoryAllocationHob ( 568 IN EFI_PHYSICAL_ADDRESS BaseAddress, 569 IN UINT64 Length, 570 IN EFI_MEMORY_TYPE MemoryType 571 ) 572 { 573 // 574 // PEI HOB is read only for DXE phase 575 // 576 ASSERT (FALSE); 577 } 578