MdePkg/Include/Library/HobLib.h

   1 /** @file
   2   Provides services to create and parse HOBs. Only available for PEI
   3   and DXE module types.
   4
   5   The HOB Library supports the efficient creation and searching of HOBs
   6   defined in the PI Specification.
   7   A HOB is a Hand-Off Block, defined in the Framework architecture, that
   8   allows the PEI phase to pass information to the DXE phase. HOBs are position
   9   independent and can be relocated easily to different memory memory locations.
  10
  11 Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
  12 This program and the accompanying materials
  13 are licensed and made available under the terms and conditions of the BSD License
  14 which accompanies this distribution.  The full text of the license may be found at
  15 http://opensource.org/licenses/bsd-license.php
  16
  17 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  18 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  19
  20 **/
  21
  22 #ifndef __HOB_LIB_H__
  23 #define __HOB_LIB_H__
  24
  25 /**
  26   Returns the pointer to the HOB list.
  27
  28   This function returns the pointer to first HOB in the list.
  29   For PEI phase, the PEI service GetHobList() can be used to retrieve the pointer
  30   to the HOB list.  For the DXE phase, the HOB list pointer can be retrieved through
  31   the EFI System Table by looking up theHOB list GUID in the System Configuration Table.
  32   Since the System Configuration Table does not exist that the time the DXE Core is
  33   launched, the DXE Core uses a global variable from the DXE Core Entry Point Library
  34   to manage the pointer to the HOB list.
  35
  36   If the pointer to the HOB list is NULL, then ASSERT().
  37
  38   @return The pointer to the HOB list.
  39
  40 **/
  41 VOID *
  42 EFIAPI
  43 GetHobList (
  44   VOID
  45   );
  46
  47 /**
  48   Returns the next instance of a HOB type from the starting HOB.
  49
  50   This function searches the first instance of a HOB type from the starting HOB pointer.
  51   If there does not exist such HOB type from the starting HOB pointer, it will return NULL.
  52   In contrast with macro GET_NEXT_HOB(), this function does not skip the starting HOB pointer
  53   unconditionally: it returns HobStart back if HobStart itself meets the requirement;
  54   caller is required to use GET_NEXT_HOB() if it wishes to skip current HobStart.
  55
  56   If HobStart is NULL, then ASSERT().
  57
  58   @param  Type          The HOB type to return.
  59   @param  HobStart      The starting HOB pointer to search from.
  60
  61   @return The next instance of a HOB type from the starting HOB.
  62
  63 **/
  64 VOID *
  65 EFIAPI
  66 GetNextHob (
  67   IN UINT16                 Type,
  68   IN CONST VOID             *HobStart
  69   );
  70
  71 /**
  72   Returns the first instance of a HOB type among the whole HOB list.
  73
  74   This function searches the first instance of a HOB type among the whole HOB list.
  75   If there does not exist such HOB type in the HOB list, it will return NULL.
  76
  77   If the pointer to the HOB list is NULL, then ASSERT().
  78
  79   @param  Type          The HOB type to return.
  80
  81   @return The next instance of a HOB type from the starting HOB.
  82
  83 **/
  84 VOID *
  85 EFIAPI
  86 GetFirstHob (
  87   IN UINT16                 Type
  88   );
  89
  90 /**
  91   Returns the next instance of the matched GUID HOB from the starting HOB.
  92
  93   This function searches the first instance of a HOB from the starting HOB pointer.
  94   Such HOB should satisfy two conditions:
  95   its HOB type is EFI_HOB_TYPE_GUID_EXTENSION and its GUID Name equals to the input Guid.
  96   If there does not exist such HOB from the starting HOB pointer, it will return NULL.
  97   Caller is required to apply GET_GUID_HOB_DATA () and GET_GUID_HOB_DATA_SIZE ()
  98   to extract the data section and its size info respectively.
  99   In contrast with macro GET_NEXT_HOB(), this function does not skip the starting HOB pointer
 100   unconditionally: it returns HobStart back if HobStart itself meets the requirement;
 101   caller is required to use GET_NEXT_HOB() if it wishes to skip current HobStart.
 102
 103   If Guid is NULL, then ASSERT().
 104   If HobStart is NULL, then ASSERT().
 105
 106   @param  Guid          The GUID to match with in the HOB list.
 107   @param  HobStart      A pointer to a Guid.
 108
 109   @return The next instance of the matched GUID HOB from the starting HOB.
 110
 111 **/
 112 VOID *
 113 EFIAPI
 114 GetNextGuidHob (
 115   IN CONST EFI_GUID         *Guid,
 116   IN CONST VOID             *HobStart
 117   );
 118
 119 /**
 120   Returns the first instance of the matched GUID HOB among the whole HOB list.
 121
 122   This function searches the first instance of a HOB among the whole HOB list.
 123   Such HOB should satisfy two conditions:
 124   its HOB type is EFI_HOB_TYPE_GUID_EXTENSION and its GUID Name equals to the input Guid.
 125   If there does not exist such HOB from the starting HOB pointer, it will return NULL.
 126   Caller is required to apply GET_GUID_HOB_DATA () and GET_GUID_HOB_DATA_SIZE ()
 127   to extract the data section and its size info respectively.
 128
 129   If the pointer to the HOB list is NULL, then ASSERT().
 130   If Guid is NULL, then ASSERT().
 131
 132   @param  Guid          The GUID to match with in the HOB list.
 133
 134   @return The first instance of the matched GUID HOB among the whole HOB list.
 135
 136 **/
 137 VOID *
 138 EFIAPI
 139 GetFirstGuidHob (
 140   IN CONST EFI_GUID         *Guid
 141   );
 142
 143 /**
 144   Get the system boot mode from the HOB list.
 145
 146   This function returns the system boot mode information from the
 147   PHIT HOB in HOB list.
 148
 149   If the pointer to the HOB list is NULL, then ASSERT().
 150
 151   @param  VOID
 152
 153   @return The Boot Mode.
 154
 155 **/
 156 EFI_BOOT_MODE
 157 EFIAPI
 158 GetBootModeHob (
 159   VOID
 160   );
 161
 162 /**
 163   Builds a HOB for a loaded PE32 module.
 164
 165   This function builds a HOB for a loaded PE32 module.
 166   It can only be invoked during PEI phase;
 167   for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
 168
 169   If ModuleName is NULL, then ASSERT().
 170   If there is no additional space for HOB creation, then ASSERT().
 171
 172   @param  ModuleName              The GUID File Name of the module.
 173   @param  MemoryAllocationModule  The 64 bit physical address of the module.
 174   @param  ModuleLength            The length of the module in bytes.
 175   @param  EntryPoint              The 64 bit physical address of the module entry point.
 176
 177 **/
 178 VOID
 179 EFIAPI
 180 BuildModuleHob (
 181   IN CONST EFI_GUID         *ModuleName,
 182   IN EFI_PHYSICAL_ADDRESS   MemoryAllocationModule,
 183   IN UINT64                 ModuleLength,
 184   IN EFI_PHYSICAL_ADDRESS   EntryPoint
 185   );
 186
 187 /**
 188   Builds a HOB that describes a chunk of system memory with Owner GUID.
 189
 190   This function builds a HOB that describes a chunk of system memory.
 191   It can only be invoked during PEI phase;
 192   for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
 193
 194   If there is no additional space for HOB creation, then ASSERT().
 195
 196   @param  ResourceType        The type of resource described by this HOB.
 197   @param  ResourceAttribute   The resource attributes of the memory described by this HOB.
 198   @param  PhysicalStart       The 64 bit physical address of memory described by this HOB.
 199   @param  NumberOfBytes       The length of the memory described by this HOB in bytes.
 200   @param  OwnerGUID           GUID for the owner of this resource.
 201
 202 **/
 203 VOID
 204 EFIAPI
 205 BuildResourceDescriptorWithOwnerHob (
 206   IN EFI_RESOURCE_TYPE            ResourceType,
 207   IN EFI_RESOURCE_ATTRIBUTE_TYPE  ResourceAttribute,
 208   IN EFI_PHYSICAL_ADDRESS         PhysicalStart,
 209   IN UINT64                       NumberOfBytes,
 210   IN EFI_GUID                     *OwnerGUID
 211   );
 212
 213 /**
 214   Builds a HOB that describes a chunk of system memory.
 215
 216   This function builds a HOB that describes a chunk of system memory.
 217   It can only be invoked during PEI phase;
 218   for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
 219
 220   If there is no additional space for HOB creation, then ASSERT().
 221
 222   @param  ResourceType        The type of resource described by this HOB.
 223   @param  ResourceAttribute   The resource attributes of the memory described by this HOB.
 224   @param  PhysicalStart       The 64 bit physical address of memory described by this HOB.
 225   @param  NumberOfBytes       The length of the memory described by this HOB in bytes.
 226
 227 **/
 228 VOID
 229 EFIAPI
 230 BuildResourceDescriptorHob (
 231   IN EFI_RESOURCE_TYPE            ResourceType,
 232   IN EFI_RESOURCE_ATTRIBUTE_TYPE  ResourceAttribute,
 233   IN EFI_PHYSICAL_ADDRESS         PhysicalStart,
 234   IN UINT64                       NumberOfBytes
 235   );
 236
 237 /**
 238   Builds a customized HOB tagged with a GUID for identification and returns
 239   the start address of GUID HOB data.
 240
 241   This function builds a customized HOB tagged with a GUID for identification
 242   and returns the start address of GUID HOB data so that caller can fill the customized data.
 243   The HOB Header and Name field is already stripped.
 244   It can only be invoked during PEI phase;
 245   for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
 246
 247   If Guid is NULL, then ASSERT().
 248   If there is no additional space for HOB creation, then ASSERT().
 249   If DataLength > (0xFFF8 - sizeof (EFI_HOB_GUID_TYPE)), then ASSERT().
 250   HobLength is UINT16 and multiples of 8 bytes, so the max HobLength is 0xFFF8.
 251
 252   @param  Guid          The GUID to tag the customized HOB.
 253   @param  DataLength    The size of the data payload for the GUID HOB.
 254
 255   @retval  NULL         The GUID HOB could not be allocated.
 256   @retval  others       The start address of GUID HOB data.
 257
 258 **/
 259 VOID *
 260 EFIAPI
 261 BuildGuidHob (
 262   IN CONST EFI_GUID              *Guid,
 263   IN UINTN                       DataLength
 264   );
 265
 266 /**
 267   Builds a customized HOB tagged with a GUID for identification, copies the input data to the HOB
 268   data field, and returns the start address of the GUID HOB data.
 269
 270   This function builds a customized HOB tagged with a GUID for identification and copies the input
 271   data to the HOB data field and returns the start address of the GUID HOB data.  It can only be
 272   invoked during PEI phase; for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
 273   The HOB Header and Name field is already stripped.
 274   It can only be invoked during PEI phase;
 275   for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
 276
 277   If Guid is NULL, then ASSERT().
 278   If Data is NULL and DataLength > 0, then ASSERT().
 279   If there is no additional space for HOB creation, then ASSERT().
 280   If DataLength > (0xFFF8 - sizeof (EFI_HOB_GUID_TYPE)), then ASSERT().
 281   HobLength is UINT16 and multiples of 8 bytes, so the max HobLength is 0xFFF8.
 282
 283   @param  Guid          The GUID to tag the customized HOB.
 284   @param  Data          The data to be copied into the data field of the GUID HOB.
 285   @param  DataLength    The size of the data payload for the GUID HOB.
 286
 287   @retval  NULL         The GUID HOB could not be allocated.
 288   @retval  others       The start address of GUID HOB data.
 289
 290 **/
 291 VOID *
 292 EFIAPI
 293 BuildGuidDataHob (
 294   IN CONST EFI_GUID              *Guid,
 295   IN VOID                        *Data,
 296   IN UINTN                       DataLength
 297   );
 298
 299 /**
 300   Builds a Firmware Volume HOB.
 301
 302   This function builds a Firmware Volume HOB.
 303   It can only be invoked during PEI phase;
 304   for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
 305
 306   If there is no additional space for HOB creation, then ASSERT().
 307   If the FvImage buffer is not at its required alignment, then ASSERT().
 308
 309   @param  BaseAddress   The base address of the Firmware Volume.
 310   @param  Length        The size of the Firmware Volume in bytes.
 311
 312 **/
 313 VOID
 314 EFIAPI
 315 BuildFvHob (
 316   IN EFI_PHYSICAL_ADDRESS        BaseAddress,
 317   IN UINT64                      Length
 318   );
 319
 320 /**
 321   Builds a EFI_HOB_TYPE_FV2 HOB.
 322
 323   This function builds a EFI_HOB_TYPE_FV2 HOB.
 324   It can only be invoked during PEI phase;
 325   for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
 326
 327   If there is no additional space for HOB creation, then ASSERT().
 328   If the FvImage buffer is not at its required alignment, then ASSERT().
 329
 330   @param  BaseAddress   The base address of the Firmware Volume.
 331   @param  Length        The size of the Firmware Volume in bytes.
 332   @param  FvName        The name of the Firmware Volume.
 333   @param  FileName      The name of the file.
 334
 335 **/
 336 VOID
 337 EFIAPI
 338 BuildFv2Hob (
 339   IN          EFI_PHYSICAL_ADDRESS        BaseAddress,
 340   IN          UINT64                      Length,
 341   IN CONST    EFI_GUID                    *FvName,
 342   IN CONST    EFI_GUID                    *FileName
 343   );
 344
 345 /**
 346   Builds a Capsule Volume HOB.
 347
 348   This function builds a Capsule Volume HOB.
 349   It can only be invoked during PEI phase;
 350   for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
 351
 352   If the platform does not support Capsule Volume HOBs, then ASSERT().
 353   If there is no additional space for HOB creation, then ASSERT().
 354
 355   @param  BaseAddress   The base address of the Capsule Volume.
 356   @param  Length        The size of the Capsule Volume in bytes.
 357
 358 **/
 359 VOID
 360 EFIAPI
 361 BuildCvHob (
 362   IN EFI_PHYSICAL_ADDRESS        BaseAddress,
 363   IN UINT64                      Length
 364   );
 365
 366 /**
 367   Builds a HOB for the CPU.
 368
 369   This function builds a HOB for the CPU.
 370   It can only be invoked during PEI phase;
 371   for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
 372
 373   If there is no additional space for HOB creation, then ASSERT().
 374
 375   @param  SizeOfMemorySpace   The maximum physical memory addressability of the processor.
 376   @param  SizeOfIoSpace       The maximum physical I/O addressability of the processor.
 377
 378 **/
 379 VOID
 380 EFIAPI
 381 BuildCpuHob (
 382   IN UINT8                       SizeOfMemorySpace,
 383   IN UINT8                       SizeOfIoSpace
 384   );
 385
 386 /**
 387   Builds a HOB for the Stack.
 388
 389   This function builds a HOB for the stack.
 390   It can only be invoked during PEI phase;
 391   for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
 392
 393   If there is no additional space for HOB creation, then ASSERT().
 394
 395   @param  BaseAddress   The 64 bit physical address of the Stack.
 396   @param  Length        The length of the stack in bytes.
 397
 398 **/
 399 VOID
 400 EFIAPI
 401 BuildStackHob (
 402   IN EFI_PHYSICAL_ADDRESS        BaseAddress,
 403   IN UINT64                      Length
 404   );
 405
 406 /**
 407   Builds a HOB for the BSP store.
 408
 409   This function builds a HOB for BSP store.
 410   It can only be invoked during PEI phase;
 411   for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
 412
 413   If there is no additional space for HOB creation, then ASSERT().
 414
 415   @param  BaseAddress   The 64 bit physical address of the BSP.
 416   @param  Length        The length of the BSP store in bytes.
 417   @param  MemoryType    Type of memory allocated by this HOB.
 418
 419 **/
 420 VOID
 421 EFIAPI
 422 BuildBspStoreHob (
 423   IN EFI_PHYSICAL_ADDRESS        BaseAddress,
 424   IN UINT64                      Length,
 425   IN EFI_MEMORY_TYPE             MemoryType
 426   );
 427
 428 /**
 429   Builds a HOB for the memory allocation.
 430
 431   This function builds a HOB for the memory allocation.
 432   It can only be invoked during PEI phase;
 433   for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
 434
 435   If there is no additional space for HOB creation, then ASSERT().
 436
 437   @param  BaseAddress   The 64 bit physical address of the memory.
 438   @param  Length        The length of the memory allocation in bytes.
 439   @param  MemoryType    Type of memory allocated by this HOB.
 440
 441 **/
 442 VOID
 443 EFIAPI
 444 BuildMemoryAllocationHob (
 445   IN EFI_PHYSICAL_ADDRESS        BaseAddress,
 446   IN UINT64                      Length,
 447   IN EFI_MEMORY_TYPE             MemoryType
 448   );
 449
 450 /**
 451   Returns the type of a HOB.
 452
 453   This macro returns the HobType field from the HOB header for the
 454   HOB specified by HobStart.
 455
 456   @param  HobStart   A pointer to a HOB.
 457
 458   @return HobType.
 459
 460 **/
 461 #define GET_HOB_TYPE(HobStart) \
 462   ((*(EFI_HOB_GENERIC_HEADER **)&(HobStart))->HobType)
 463
 464 /**
 465   Returns the length, in bytes, of a HOB.
 466
 467   This macro returns the HobLength field from the HOB header for the
 468   HOB specified by HobStart.
 469
 470   @param  HobStart   A pointer to a HOB.
 471
 472   @return HobLength.
 473
 474 **/
 475 #define GET_HOB_LENGTH(HobStart) \
 476   ((*(EFI_HOB_GENERIC_HEADER **)&(HobStart))->HobLength)
 477
 478 /**
 479   Returns a pointer to the next HOB in the HOB list.
 480
 481   This macro returns a pointer to HOB that follows the
 482   HOB specified by HobStart in the HOB List.
 483
 484   @param  HobStart   A pointer to a HOB.
 485
 486   @return A pointer to the next HOB in the HOB list.
 487
 488 **/
 489 #define GET_NEXT_HOB(HobStart) \
 490   (VOID *)(*(UINT8 **)&(HobStart) + GET_HOB_LENGTH (HobStart))
 491
 492 /**
 493   Determines if a HOB is the last HOB in the HOB list.
 494
 495   This macro determine if the HOB specified by HobStart is the
 496   last HOB in the HOB list.  If HobStart is last HOB in the HOB list,
 497   then TRUE is returned.  Otherwise, FALSE is returned.
 498
 499   @param  HobStart   A pointer to a HOB.
 500
 501   @retval TRUE       The HOB specified by HobStart is the last HOB in the HOB list.
 502   @retval FALSE      The HOB specified by HobStart is not the last HOB in the HOB list.
 503
 504 **/
 505 #define END_OF_HOB_LIST(HobStart)  (GET_HOB_TYPE (HobStart) == (UINT16)EFI_HOB_TYPE_END_OF_HOB_LIST)
 506
 507 /**
 508   Returns a pointer to data buffer from a HOB of type EFI_HOB_TYPE_GUID_EXTENSION.
 509
 510   This macro returns a pointer to the data buffer in a HOB specified by HobStart.
 511   HobStart is assumed to be a HOB of type EFI_HOB_TYPE_GUID_EXTENSION.
 512
 513   @param   GuidHob   A pointer to a HOB.
 514
 515   @return  A pointer to the data buffer in a HOB.
 516
 517 **/
 518 #define GET_GUID_HOB_DATA(HobStart) \
 519   (VOID *)(*(UINT8 **)&(HobStart) + sizeof (EFI_HOB_GUID_TYPE))
 520
 521 /**
 522   Returns the size of the data buffer from a HOB of type EFI_HOB_TYPE_GUID_EXTENSION.
 523
 524   This macro returns the size, in bytes, of the data buffer in a HOB specified by HobStart.
 525   HobStart is assumed to be a HOB of type EFI_HOB_TYPE_GUID_EXTENSION.
 526
 527   @param   GuidHob   A pointer to a HOB.
 528
 529   @return  The size of the data buffer.
 530 **/
 531 #define GET_GUID_HOB_DATA_SIZE(HobStart) \
 532   (UINT16)(GET_HOB_LENGTH (HobStart) - sizeof (EFI_HOB_GUID_TYPE))
 533
 534 #endif