2 Provide Hob Library functions for Pei phase.
4 Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php.
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
17 #include <Guid/MemoryAllocationHob.h>
19 #include <Library/HobLib.h>
20 #include <Library/DebugLib.h>
21 #include <Library/PeiServicesLib.h>
22 #include <Library/BaseMemoryLib.h>
25 Returns the pointer to the HOB list.
27 This function returns the pointer to first HOB in the list.
28 For PEI phase, the PEI service GetHobList() can be used to retrieve the pointer
29 to the HOB list. For the DXE phase, the HOB list pointer can be retrieved through
30 the EFI System Table by looking up theHOB list GUID in the System Configuration Table.
31 Since the System Configuration Table does not exist that the time the DXE Core is
32 launched, the DXE Core uses a global variable from the DXE Core Entry Point Library
33 to manage the pointer to the HOB list.
35 If the pointer to the HOB list is NULL, then ASSERT().
37 @return The pointer to the HOB list.
49 Status
= PeiServicesGetHobList (&HobList
);
50 ASSERT_EFI_ERROR (Status
);
51 ASSERT (HobList
!= NULL
);
57 Returns the next instance of a HOB type from the starting HOB.
59 This function searches the first instance of a HOB type from the starting HOB pointer.
60 If there does not exist such HOB type from the starting HOB pointer, it will return NULL.
61 In contrast with macro GET_NEXT_HOB(), this function does not skip the starting HOB pointer
62 unconditionally: it returns HobStart back if HobStart itself meets the requirement;
63 caller is required to use GET_NEXT_HOB() if it wishes to skip current HobStart.
65 If HobStart is NULL, then ASSERT().
67 @param Type The HOB type to return.
68 @param HobStart The starting HOB pointer to search from.
70 @return The next instance of a HOB type from the starting HOB.
77 IN CONST VOID
*HobStart
80 EFI_PEI_HOB_POINTERS Hob
;
82 ASSERT (HobStart
!= NULL
);
84 Hob
.Raw
= (UINT8
*) HobStart
;
86 // Parse the HOB list until end of list or matching type is found.
88 while (!END_OF_HOB_LIST (Hob
)) {
89 if (Hob
.Header
->HobType
== Type
) {
92 Hob
.Raw
= GET_NEXT_HOB (Hob
);
98 Returns the first instance of a HOB type among the whole HOB list.
100 This function searches the first instance of a HOB type among the whole HOB list.
101 If there does not exist such HOB type in the HOB list, it will return NULL.
103 If the pointer to the HOB list is NULL, then ASSERT().
105 @param Type The HOB type to return.
107 @return The next instance of a HOB type from the starting HOB.
118 HobList
= GetHobList ();
119 return GetNextHob (Type
, HobList
);
123 Returns the next instance of the matched GUID HOB from the starting HOB.
125 This function searches the first instance of a HOB from the starting HOB pointer.
126 Such HOB should satisfy two conditions:
127 its HOB type is EFI_HOB_TYPE_GUID_EXTENSION and its GUID Name equals to the input Guid.
128 If there does not exist such HOB from the starting HOB pointer, it will return NULL.
129 Caller is required to apply GET_GUID_HOB_DATA () and GET_GUID_HOB_DATA_SIZE ()
130 to extract the data section and its size information, respectively.
131 In contrast with macro GET_NEXT_HOB(), this function does not skip the starting HOB pointer
132 unconditionally: it returns HobStart back if HobStart itself meets the requirement;
133 caller is required to use GET_NEXT_HOB() if it wishes to skip current HobStart.
135 If Guid is NULL, then ASSERT().
136 If HobStart is NULL, then ASSERT().
138 @param Guid The GUID to match with in the HOB list.
139 @param HobStart A pointer to a Guid.
141 @return The next instance of the matched GUID HOB from the starting HOB.
147 IN CONST EFI_GUID
*Guid
,
148 IN CONST VOID
*HobStart
151 EFI_PEI_HOB_POINTERS GuidHob
;
153 GuidHob
.Raw
= (UINT8
*) HobStart
;
154 while ((GuidHob
.Raw
= GetNextHob (EFI_HOB_TYPE_GUID_EXTENSION
, GuidHob
.Raw
)) != NULL
) {
155 if (CompareGuid (Guid
, &GuidHob
.Guid
->Name
)) {
158 GuidHob
.Raw
= GET_NEXT_HOB (GuidHob
);
164 Returns the first instance of the matched GUID HOB among the whole HOB list.
166 This function searches the first instance of a HOB among the whole HOB list.
167 Such HOB should satisfy two conditions:
168 its HOB type is EFI_HOB_TYPE_GUID_EXTENSION and its GUID Name equals to the input Guid.
169 If there does not exist such HOB from the starting HOB pointer, it will return NULL.
170 Caller is required to apply GET_GUID_HOB_DATA () and GET_GUID_HOB_DATA_SIZE ()
171 to extract the data section and its size information, respectively.
173 If the pointer to the HOB list is NULL, then ASSERT().
174 If Guid is NULL, then ASSERT().
176 @param Guid The GUID to match with in the HOB list.
178 @return The first instance of the matched GUID HOB among the whole HOB list.
184 IN CONST EFI_GUID
*Guid
189 HobList
= GetHobList ();
190 return GetNextGuidHob (Guid
, HobList
);
194 Get the system boot mode from the HOB list.
196 This function returns the system boot mode information from the
197 PHIT HOB in HOB list.
199 If the pointer to the HOB list is NULL, then ASSERT().
203 @return The Boot Mode.
213 EFI_BOOT_MODE BootMode
;
215 Status
= PeiServicesGetBootMode (&BootMode
);
216 ASSERT_EFI_ERROR (Status
);
222 Adds a new HOB to the HOB List.
224 This internal function enables PEIMs to create various types of HOBs.
226 @param Type Type of the new HOB.
227 @param Length Length of the new HOB to allocate.
229 @retval NULL The HOB could not be allocated.
230 @retval others The address of new HOB.
235 InternalPeiCreateHob (
243 Status
= PeiServicesCreateHob (Type
, Length
, &Hob
);
244 if (EFI_ERROR (Status
)) {
248 // Assume the process of HOB building is always successful.
250 ASSERT (Hob
!= NULL
);
255 Builds a HOB for a loaded PE32 module.
257 This function builds a HOB for a loaded PE32 module.
258 It can only be invoked during PEI phase;
259 for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
261 If ModuleName is NULL, then ASSERT().
262 If there is no additional space for HOB creation, then ASSERT().
264 @param ModuleName The GUID File Name of the module.
265 @param MemoryAllocationModule The 64 bit physical address of the module.
266 @param ModuleLength The length of the module in bytes.
267 @param EntryPoint The 64 bit physical address of the module entry point.
273 IN CONST EFI_GUID
*ModuleName
,
274 IN EFI_PHYSICAL_ADDRESS MemoryAllocationModule
,
275 IN UINT64 ModuleLength
,
276 IN EFI_PHYSICAL_ADDRESS EntryPoint
279 EFI_HOB_MEMORY_ALLOCATION_MODULE
*Hob
;
281 ASSERT (((MemoryAllocationModule
& (EFI_PAGE_SIZE
- 1)) == 0) &&
282 ((ModuleLength
& (EFI_PAGE_SIZE
- 1)) == 0));
284 Hob
= InternalPeiCreateHob (EFI_HOB_TYPE_MEMORY_ALLOCATION
, (UINT16
) sizeof (EFI_HOB_MEMORY_ALLOCATION_MODULE
));
289 CopyGuid (&(Hob
->MemoryAllocationHeader
.Name
), &gEfiHobMemoryAllocModuleGuid
);
290 Hob
->MemoryAllocationHeader
.MemoryBaseAddress
= MemoryAllocationModule
;
291 Hob
->MemoryAllocationHeader
.MemoryLength
= ModuleLength
;
292 Hob
->MemoryAllocationHeader
.MemoryType
= EfiBootServicesCode
;
295 // Zero the reserved space to match HOB spec
297 ZeroMem (Hob
->MemoryAllocationHeader
.Reserved
, sizeof (Hob
->MemoryAllocationHeader
.Reserved
));
299 CopyGuid (&Hob
->ModuleName
, ModuleName
);
300 Hob
->EntryPoint
= EntryPoint
;
304 Builds a HOB that describes a chunk of system memory with Owner GUID.
306 This function builds a HOB that describes a chunk of system memory.
307 It can only be invoked during PEI phase;
308 for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
310 If there is no additional space for HOB creation, then ASSERT().
312 @param ResourceType The type of resource described by this HOB.
313 @param ResourceAttribute The resource attributes of the memory described by this HOB.
314 @param PhysicalStart The 64 bit physical address of memory described by this HOB.
315 @param NumberOfBytes The length of the memory described by this HOB in bytes.
316 @param OwnerGUID GUID for the owner of this resource.
321 BuildResourceDescriptorWithOwnerHob (
322 IN EFI_RESOURCE_TYPE ResourceType
,
323 IN EFI_RESOURCE_ATTRIBUTE_TYPE ResourceAttribute
,
324 IN EFI_PHYSICAL_ADDRESS PhysicalStart
,
325 IN UINT64 NumberOfBytes
,
326 IN EFI_GUID
*OwnerGUID
329 EFI_HOB_RESOURCE_DESCRIPTOR
*Hob
;
331 Hob
= InternalPeiCreateHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR
, (UINT16
) sizeof (EFI_HOB_RESOURCE_DESCRIPTOR
));
336 Hob
->ResourceType
= ResourceType
;
337 Hob
->ResourceAttribute
= ResourceAttribute
;
338 Hob
->PhysicalStart
= PhysicalStart
;
339 Hob
->ResourceLength
= NumberOfBytes
;
341 CopyGuid (&Hob
->Owner
, OwnerGUID
);
345 Builds a HOB that describes a chunk of system memory.
347 This function builds a HOB that describes a chunk of system memory.
348 It can only be invoked during PEI phase;
349 for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
351 If there is no additional space for HOB creation, then ASSERT().
353 @param ResourceType The type of resource described by this HOB.
354 @param ResourceAttribute The resource attributes of the memory described by this HOB.
355 @param PhysicalStart The 64 bit physical address of memory described by this HOB.
356 @param NumberOfBytes The length of the memory described by this HOB in bytes.
361 BuildResourceDescriptorHob (
362 IN EFI_RESOURCE_TYPE ResourceType
,
363 IN EFI_RESOURCE_ATTRIBUTE_TYPE ResourceAttribute
,
364 IN EFI_PHYSICAL_ADDRESS PhysicalStart
,
365 IN UINT64 NumberOfBytes
368 EFI_HOB_RESOURCE_DESCRIPTOR
*Hob
;
370 Hob
= InternalPeiCreateHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR
, (UINT16
) sizeof (EFI_HOB_RESOURCE_DESCRIPTOR
));
375 Hob
->ResourceType
= ResourceType
;
376 Hob
->ResourceAttribute
= ResourceAttribute
;
377 Hob
->PhysicalStart
= PhysicalStart
;
378 Hob
->ResourceLength
= NumberOfBytes
;
379 ZeroMem (&(Hob
->Owner
), sizeof (EFI_GUID
));
383 Builds a customized HOB tagged with a GUID for identification and returns
384 the start address of GUID HOB data.
386 This function builds a customized HOB tagged with a GUID for identification
387 and returns the start address of GUID HOB data so that caller can fill the customized data.
388 The HOB Header and Name field is already stripped.
389 It can only be invoked during PEI phase;
390 for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
392 If Guid is NULL, then ASSERT().
393 If there is no additional space for HOB creation, then ASSERT().
394 If DataLength > (0xFFF8 - sizeof (EFI_HOB_GUID_TYPE)), then ASSERT().
395 HobLength is UINT16 and multiples of 8 bytes, so the max HobLength is 0xFFF8.
397 @param Guid The GUID to tag the customized HOB.
398 @param DataLength The size of the data payload for the GUID HOB.
400 @retval NULL The GUID HOB could not be allocated.
401 @retval others The start address of GUID HOB data.
407 IN CONST EFI_GUID
*Guid
,
411 EFI_HOB_GUID_TYPE
*Hob
;
414 // Make sure Guid is valid
416 ASSERT (Guid
!= NULL
);
419 // Make sure that data length is not too long.
421 ASSERT (DataLength
<= (0xFFF8 - sizeof (EFI_HOB_GUID_TYPE
)));
423 Hob
= InternalPeiCreateHob (EFI_HOB_TYPE_GUID_EXTENSION
, (UINT16
) (sizeof (EFI_HOB_GUID_TYPE
) + DataLength
));
427 CopyGuid (&Hob
->Name
, Guid
);
432 Builds a customized HOB tagged with a GUID for identification, copies the input data to the HOB
433 data field, and returns the start address of the GUID HOB data.
435 This function builds a customized HOB tagged with a GUID for identification and copies the input
436 data to the HOB data field and returns the start address of the GUID HOB data. It can only be
437 invoked during PEI phase; for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
438 The HOB Header and Name field is already stripped.
439 It can only be invoked during PEI phase;
440 for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
442 If Guid is NULL, then ASSERT().
443 If Data is NULL and DataLength > 0, then ASSERT().
444 If there is no additional space for HOB creation, then ASSERT().
445 If DataLength > (0xFFF8 - sizeof (EFI_HOB_GUID_TYPE)), then ASSERT().
446 HobLength is UINT16 and multiples of 8 bytes, so the max HobLength is 0xFFF8.
448 @param Guid The GUID to tag the customized HOB.
449 @param Data The data to be copied into the data field of the GUID HOB.
450 @param DataLength The size of the data payload for the GUID HOB.
452 @retval NULL The GUID HOB could not be allocated.
453 @retval others The start address of GUID HOB data.
459 IN CONST EFI_GUID
*Guid
,
466 ASSERT (Data
!= NULL
|| DataLength
== 0);
468 HobData
= BuildGuidHob (Guid
, DataLength
);
469 if (HobData
== NULL
) {
473 return CopyMem (HobData
, Data
, DataLength
);
479 @param BaseAddress The base address of the Firmware Volume.
480 @param Length The size of the Firmware Volume in bytes.
482 @retval TRUE FvImage buffer is at its required alignment.
483 @retval FALSE FvImage buffer is not at its required alignment.
487 InternalCheckFvAlignment (
488 IN EFI_PHYSICAL_ADDRESS BaseAddress
,
492 EFI_FIRMWARE_VOLUME_HEADER
*FwVolHeader
;
496 FwVolHeader
= (EFI_FIRMWARE_VOLUME_HEADER
*) (UINTN
) BaseAddress
;
499 // If EFI_FVB2_WEAK_ALIGNMENT is set in the volume header then the first byte of the volume
500 // can be aligned on any power-of-two boundary. A weakly aligned volume can not be moved from
501 // its initial linked location and maintain its alignment.
503 if ((FwVolHeader
->Attributes
& EFI_FVB2_WEAK_ALIGNMENT
) != EFI_FVB2_WEAK_ALIGNMENT
) {
505 // Get FvHeader alignment
507 FvAlignment
= 1 << ((FwVolHeader
->Attributes
& EFI_FVB2_ALIGNMENT
) >> 16);
509 // FvAlignment must be greater than or equal to 8 bytes of the minimum FFS alignment value.
511 if (FvAlignment
< 8) {
514 if ((UINTN
)BaseAddress
% FvAlignment
!= 0) {
516 // FvImage buffer is not at its required alignment.
520 "Unaligned FvImage found at 0x%lx:0x%lx, the required alignment is 0x%x\n",
533 Builds a Firmware Volume HOB.
535 This function builds a Firmware Volume HOB.
536 It can only be invoked during PEI phase;
537 for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
539 If there is no additional space for HOB creation, then ASSERT().
540 If the FvImage buffer is not at its required alignment, then ASSERT().
542 @param BaseAddress The base address of the Firmware Volume.
543 @param Length The size of the Firmware Volume in bytes.
549 IN EFI_PHYSICAL_ADDRESS BaseAddress
,
553 EFI_HOB_FIRMWARE_VOLUME
*Hob
;
555 if (!InternalCheckFvAlignment (BaseAddress
, Length
)) {
560 Hob
= InternalPeiCreateHob (EFI_HOB_TYPE_FV
, (UINT16
) sizeof (EFI_HOB_FIRMWARE_VOLUME
));
565 Hob
->BaseAddress
= BaseAddress
;
566 Hob
->Length
= Length
;
570 Builds a EFI_HOB_TYPE_FV2 HOB.
572 This function builds a EFI_HOB_TYPE_FV2 HOB.
573 It can only be invoked during PEI phase;
574 for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
576 If there is no additional space for HOB creation, then ASSERT().
577 If the FvImage buffer is not at its required alignment, then ASSERT().
579 @param BaseAddress The base address of the Firmware Volume.
580 @param Length The size of the Firmware Volume in bytes.
581 @param FvName The name of the Firmware Volume.
582 @param FileName The name of the file.
588 IN EFI_PHYSICAL_ADDRESS BaseAddress
,
590 IN CONST EFI_GUID
*FvName
,
591 IN CONST EFI_GUID
*FileName
594 EFI_HOB_FIRMWARE_VOLUME2
*Hob
;
596 if (!InternalCheckFvAlignment (BaseAddress
, Length
)) {
601 Hob
= InternalPeiCreateHob (EFI_HOB_TYPE_FV2
, (UINT16
) sizeof (EFI_HOB_FIRMWARE_VOLUME2
));
606 Hob
->BaseAddress
= BaseAddress
;
607 Hob
->Length
= Length
;
608 CopyGuid (&Hob
->FvName
, FvName
);
609 CopyGuid (&Hob
->FileName
, FileName
);
613 Builds a EFI_HOB_TYPE_FV3 HOB.
615 This function builds a EFI_HOB_TYPE_FV3 HOB.
616 It can only be invoked during PEI phase;
617 for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
619 If there is no additional space for HOB creation, then ASSERT().
620 If the FvImage buffer is not at its required alignment, then ASSERT().
622 @param BaseAddress The base address of the Firmware Volume.
623 @param Length The size of the Firmware Volume in bytes.
624 @param AuthenticationStatus The authentication status.
625 @param ExtractedFv TRUE if the FV was extracted as a file within
626 another firmware volume. FALSE otherwise.
627 @param FvName The name of the Firmware Volume.
628 Valid only if IsExtractedFv is TRUE.
629 @param FileName The name of the file.
630 Valid only if IsExtractedFv is TRUE.
636 IN EFI_PHYSICAL_ADDRESS BaseAddress
,
638 IN UINT32 AuthenticationStatus
,
639 IN BOOLEAN ExtractedFv
,
640 IN CONST EFI_GUID
*FvName
, OPTIONAL
641 IN CONST EFI_GUID
*FileName OPTIONAL
644 EFI_HOB_FIRMWARE_VOLUME3
*Hob
;
646 if (!InternalCheckFvAlignment (BaseAddress
, Length
)) {
651 Hob
= InternalPeiCreateHob (EFI_HOB_TYPE_FV3
, (UINT16
) sizeof (EFI_HOB_FIRMWARE_VOLUME3
));
656 Hob
->BaseAddress
= BaseAddress
;
657 Hob
->Length
= Length
;
658 Hob
->AuthenticationStatus
= AuthenticationStatus
;
659 Hob
->ExtractedFv
= ExtractedFv
;
661 CopyGuid (&Hob
->FvName
, FvName
);
662 CopyGuid (&Hob
->FileName
, FileName
);
667 Builds a Capsule Volume HOB.
669 This function builds a Capsule Volume HOB.
670 It can only be invoked during PEI phase;
671 for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
673 If the platform does not support Capsule Volume HOBs, then ASSERT().
674 If there is no additional space for HOB creation, then ASSERT().
676 @param BaseAddress The base address of the Capsule Volume.
677 @param Length The size of the Capsule Volume in bytes.
683 IN EFI_PHYSICAL_ADDRESS BaseAddress
,
687 EFI_HOB_UEFI_CAPSULE
*Hob
;
689 Hob
= InternalPeiCreateHob (EFI_HOB_TYPE_UEFI_CAPSULE
, (UINT16
) sizeof (EFI_HOB_UEFI_CAPSULE
));
694 Hob
->BaseAddress
= BaseAddress
;
695 Hob
->Length
= Length
;
699 Builds a HOB for the CPU.
701 This function builds a HOB for the CPU.
702 It can only be invoked during PEI phase;
703 for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
705 If there is no additional space for HOB creation, then ASSERT().
707 @param SizeOfMemorySpace The maximum physical memory addressability of the processor.
708 @param SizeOfIoSpace The maximum physical I/O addressability of the processor.
714 IN UINT8 SizeOfMemorySpace
,
715 IN UINT8 SizeOfIoSpace
720 Hob
= InternalPeiCreateHob (EFI_HOB_TYPE_CPU
, (UINT16
) sizeof (EFI_HOB_CPU
));
725 Hob
->SizeOfMemorySpace
= SizeOfMemorySpace
;
726 Hob
->SizeOfIoSpace
= SizeOfIoSpace
;
729 // Zero the reserved space to match HOB spec
731 ZeroMem (Hob
->Reserved
, sizeof (Hob
->Reserved
));
735 Builds a HOB for the Stack.
737 This function builds a HOB for the stack.
738 It can only be invoked during PEI phase;
739 for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
741 If there is no additional space for HOB creation, then ASSERT().
743 @param BaseAddress The 64 bit physical address of the Stack.
744 @param Length The length of the stack in bytes.
750 IN EFI_PHYSICAL_ADDRESS BaseAddress
,
754 EFI_HOB_MEMORY_ALLOCATION_STACK
*Hob
;
756 ASSERT (((BaseAddress
& (EFI_PAGE_SIZE
- 1)) == 0) &&
757 ((Length
& (EFI_PAGE_SIZE
- 1)) == 0));
759 Hob
= InternalPeiCreateHob (EFI_HOB_TYPE_MEMORY_ALLOCATION
, (UINT16
) sizeof (EFI_HOB_MEMORY_ALLOCATION_STACK
));
764 CopyGuid (&(Hob
->AllocDescriptor
.Name
), &gEfiHobMemoryAllocStackGuid
);
765 Hob
->AllocDescriptor
.MemoryBaseAddress
= BaseAddress
;
766 Hob
->AllocDescriptor
.MemoryLength
= Length
;
767 Hob
->AllocDescriptor
.MemoryType
= EfiBootServicesData
;
770 // Zero the reserved space to match HOB spec
772 ZeroMem (Hob
->AllocDescriptor
.Reserved
, sizeof (Hob
->AllocDescriptor
.Reserved
));
776 Builds a HOB for the BSP store.
778 This function builds a HOB for BSP store.
779 It can only be invoked during PEI phase;
780 for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
782 If there is no additional space for HOB creation, then ASSERT().
784 @param BaseAddress The 64 bit physical address of the BSP.
785 @param Length The length of the BSP store in bytes.
786 @param MemoryType The type of memory allocated by this HOB.
792 IN EFI_PHYSICAL_ADDRESS BaseAddress
,
794 IN EFI_MEMORY_TYPE MemoryType
797 EFI_HOB_MEMORY_ALLOCATION_BSP_STORE
*Hob
;
799 ASSERT (((BaseAddress
& (EFI_PAGE_SIZE
- 1)) == 0) &&
800 ((Length
& (EFI_PAGE_SIZE
- 1)) == 0));
802 Hob
= InternalPeiCreateHob (EFI_HOB_TYPE_MEMORY_ALLOCATION
, (UINT16
) sizeof (EFI_HOB_MEMORY_ALLOCATION_BSP_STORE
));
807 CopyGuid (&(Hob
->AllocDescriptor
.Name
), &gEfiHobMemoryAllocBspStoreGuid
);
808 Hob
->AllocDescriptor
.MemoryBaseAddress
= BaseAddress
;
809 Hob
->AllocDescriptor
.MemoryLength
= Length
;
810 Hob
->AllocDescriptor
.MemoryType
= MemoryType
;
813 // Zero the reserved space to match HOB spec
815 ZeroMem (Hob
->AllocDescriptor
.Reserved
, sizeof (Hob
->AllocDescriptor
.Reserved
));
819 Builds a HOB for the memory allocation.
821 This function builds a HOB for the memory allocation.
822 It can only be invoked during PEI phase;
823 for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
825 If there is no additional space for HOB creation, then ASSERT().
827 @param BaseAddress The 64 bit physical address of the memory.
828 @param Length The length of the memory allocation in bytes.
829 @param MemoryType The type of memory allocated by this HOB.
834 BuildMemoryAllocationHob (
835 IN EFI_PHYSICAL_ADDRESS BaseAddress
,
837 IN EFI_MEMORY_TYPE MemoryType
840 EFI_HOB_MEMORY_ALLOCATION
*Hob
;
842 ASSERT (((BaseAddress
& (EFI_PAGE_SIZE
- 1)) == 0) &&
843 ((Length
& (EFI_PAGE_SIZE
- 1)) == 0));
845 Hob
= InternalPeiCreateHob (EFI_HOB_TYPE_MEMORY_ALLOCATION
, (UINT16
) sizeof (EFI_HOB_MEMORY_ALLOCATION
));
850 ZeroMem (&(Hob
->AllocDescriptor
.Name
), sizeof (EFI_GUID
));
851 Hob
->AllocDescriptor
.MemoryBaseAddress
= BaseAddress
;
852 Hob
->AllocDescriptor
.MemoryLength
= Length
;
853 Hob
->AllocDescriptor
.MemoryType
= MemoryType
;
855 // Zero the reserved space to match HOB spec
857 ZeroMem (Hob
->AllocDescriptor
.Reserved
, sizeof (Hob
->AllocDescriptor
.Reserved
));