/** @file | |
Provide Hob Library functions for Pei phase. | |
Copyright (c) 2007 - 2014, Intel Corporation. All rights reserved.<BR> | |
This program and the accompanying materials | |
are licensed and made available under the terms and conditions of the BSD License | |
which accompanies this distribution. The full text of the license may be found at | |
http://opensource.org/licenses/bsd-license.php. | |
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
**/ | |
#include <PiPei.h> | |
#include <Guid/MemoryAllocationHob.h> | |
#include <Library/HobLib.h> | |
#include <Library/DebugLib.h> | |
#include <Library/PeiServicesLib.h> | |
#include <Library/BaseMemoryLib.h> | |
/** | |
Returns the pointer to the HOB list. | |
This function returns the pointer to first HOB in the list. | |
For PEI phase, the PEI service GetHobList() can be used to retrieve the pointer | |
to the HOB list. For the DXE phase, the HOB list pointer can be retrieved through | |
the EFI System Table by looking up theHOB list GUID in the System Configuration Table. | |
Since the System Configuration Table does not exist that the time the DXE Core is | |
launched, the DXE Core uses a global variable from the DXE Core Entry Point Library | |
to manage the pointer to the HOB list. | |
If the pointer to the HOB list is NULL, then ASSERT(). | |
@return The pointer to the HOB list. | |
**/ | |
VOID * | |
EFIAPI | |
GetHobList ( | |
VOID | |
) | |
{ | |
EFI_STATUS Status; | |
VOID *HobList; | |
Status = PeiServicesGetHobList (&HobList); | |
ASSERT_EFI_ERROR (Status); | |
ASSERT (HobList != NULL); | |
return HobList; | |
} | |
/** | |
Returns the next instance of a HOB type from the starting HOB. | |
This function searches the first instance of a HOB type from the starting HOB pointer. | |
If there does not exist such HOB type from the starting HOB pointer, it will return NULL. | |
In contrast with macro GET_NEXT_HOB(), this function does not skip the starting HOB pointer | |
unconditionally: it returns HobStart back if HobStart itself meets the requirement; | |
caller is required to use GET_NEXT_HOB() if it wishes to skip current HobStart. | |
If HobStart is NULL, then ASSERT(). | |
@param Type The HOB type to return. | |
@param HobStart The starting HOB pointer to search from. | |
@return The next instance of a HOB type from the starting HOB. | |
**/ | |
VOID * | |
EFIAPI | |
GetNextHob ( | |
IN UINT16 Type, | |
IN CONST VOID *HobStart | |
) | |
{ | |
EFI_PEI_HOB_POINTERS Hob; | |
ASSERT (HobStart != NULL); | |
Hob.Raw = (UINT8 *) HobStart; | |
// | |
// Parse the HOB list until end of list or matching type is found. | |
// | |
while (!END_OF_HOB_LIST (Hob)) { | |
if (Hob.Header->HobType == Type) { | |
return Hob.Raw; | |
} | |
Hob.Raw = GET_NEXT_HOB (Hob); | |
} | |
return NULL; | |
} | |
/** | |
Returns the first instance of a HOB type among the whole HOB list. | |
This function searches the first instance of a HOB type among the whole HOB list. | |
If there does not exist such HOB type in the HOB list, it will return NULL. | |
If the pointer to the HOB list is NULL, then ASSERT(). | |
@param Type The HOB type to return. | |
@return The next instance of a HOB type from the starting HOB. | |
**/ | |
VOID * | |
EFIAPI | |
GetFirstHob ( | |
IN UINT16 Type | |
) | |
{ | |
VOID *HobList; | |
HobList = GetHobList (); | |
return GetNextHob (Type, HobList); | |
} | |
/** | |
Returns the next instance of the matched GUID HOB from the starting HOB. | |
This function searches the first instance of a HOB from the starting HOB pointer. | |
Such HOB should satisfy two conditions: | |
its HOB type is EFI_HOB_TYPE_GUID_EXTENSION and its GUID Name equals to the input Guid. | |
If there does not exist such HOB from the starting HOB pointer, it will return NULL. | |
Caller is required to apply GET_GUID_HOB_DATA () and GET_GUID_HOB_DATA_SIZE () | |
to extract the data section and its size information, respectively. | |
In contrast with macro GET_NEXT_HOB(), this function does not skip the starting HOB pointer | |
unconditionally: it returns HobStart back if HobStart itself meets the requirement; | |
caller is required to use GET_NEXT_HOB() if it wishes to skip current HobStart. | |
If Guid is NULL, then ASSERT(). | |
If HobStart is NULL, then ASSERT(). | |
@param Guid The GUID to match with in the HOB list. | |
@param HobStart A pointer to a Guid. | |
@return The next instance of the matched GUID HOB from the starting HOB. | |
**/ | |
VOID * | |
EFIAPI | |
GetNextGuidHob ( | |
IN CONST EFI_GUID *Guid, | |
IN CONST VOID *HobStart | |
) | |
{ | |
EFI_PEI_HOB_POINTERS GuidHob; | |
GuidHob.Raw = (UINT8 *) HobStart; | |
while ((GuidHob.Raw = GetNextHob (EFI_HOB_TYPE_GUID_EXTENSION, GuidHob.Raw)) != NULL) { | |
if (CompareGuid (Guid, &GuidHob.Guid->Name)) { | |
break; | |
} | |
GuidHob.Raw = GET_NEXT_HOB (GuidHob); | |
} | |
return GuidHob.Raw; | |
} | |
/** | |
Returns the first instance of the matched GUID HOB among the whole HOB list. | |
This function searches the first instance of a HOB among the whole HOB list. | |
Such HOB should satisfy two conditions: | |
its HOB type is EFI_HOB_TYPE_GUID_EXTENSION and its GUID Name equals to the input Guid. | |
If there does not exist such HOB from the starting HOB pointer, it will return NULL. | |
Caller is required to apply GET_GUID_HOB_DATA () and GET_GUID_HOB_DATA_SIZE () | |
to extract the data section and its size information, respectively. | |
If the pointer to the HOB list is NULL, then ASSERT(). | |
If Guid is NULL, then ASSERT(). | |
@param Guid The GUID to match with in the HOB list. | |
@return The first instance of the matched GUID HOB among the whole HOB list. | |
**/ | |
VOID * | |
EFIAPI | |
GetFirstGuidHob ( | |
IN CONST EFI_GUID *Guid | |
) | |
{ | |
VOID *HobList; | |
HobList = GetHobList (); | |
return GetNextGuidHob (Guid, HobList); | |
} | |
/** | |
Get the system boot mode from the HOB list. | |
This function returns the system boot mode information from the | |
PHIT HOB in HOB list. | |
If the pointer to the HOB list is NULL, then ASSERT(). | |
@param VOID. | |
@return The Boot Mode. | |
**/ | |
EFI_BOOT_MODE | |
EFIAPI | |
GetBootModeHob ( | |
VOID | |
) | |
{ | |
EFI_STATUS Status; | |
EFI_BOOT_MODE BootMode; | |
Status = PeiServicesGetBootMode (&BootMode); | |
ASSERT_EFI_ERROR (Status); | |
return BootMode; | |
} | |
/** | |
Adds a new HOB to the HOB List. | |
This internal function enables PEIMs to create various types of HOBs. | |
@param Type Type of the new HOB. | |
@param Length Length of the new HOB to allocate. | |
@retval NULL The HOB could not be allocated. | |
@retval others The address of new HOB. | |
**/ | |
VOID * | |
EFIAPI | |
InternalPeiCreateHob ( | |
IN UINT16 Type, | |
IN UINT16 Length | |
) | |
{ | |
EFI_STATUS Status; | |
VOID *Hob; | |
Status = PeiServicesCreateHob (Type, Length, &Hob); | |
if (EFI_ERROR (Status)) { | |
Hob = NULL; | |
} | |
// | |
// Assume the process of HOB building is always successful. | |
// | |
ASSERT (Hob != NULL); | |
return Hob; | |
} | |
/** | |
Builds a HOB for a loaded PE32 module. | |
This function builds a HOB for a loaded PE32 module. | |
It can only be invoked during PEI phase; | |
for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase. | |
If ModuleName is NULL, then ASSERT(). | |
If there is no additional space for HOB creation, then ASSERT(). | |
@param ModuleName The GUID File Name of the module. | |
@param MemoryAllocationModule The 64 bit physical address of the module. | |
@param ModuleLength The length of the module in bytes. | |
@param EntryPoint The 64 bit physical address of the module entry point. | |
**/ | |
VOID | |
EFIAPI | |
BuildModuleHob ( | |
IN CONST EFI_GUID *ModuleName, | |
IN EFI_PHYSICAL_ADDRESS MemoryAllocationModule, | |
IN UINT64 ModuleLength, | |
IN EFI_PHYSICAL_ADDRESS EntryPoint | |
) | |
{ | |
EFI_HOB_MEMORY_ALLOCATION_MODULE *Hob; | |
ASSERT (((MemoryAllocationModule & (EFI_PAGE_SIZE - 1)) == 0) && | |
((ModuleLength & (EFI_PAGE_SIZE - 1)) == 0)); | |
Hob = InternalPeiCreateHob (EFI_HOB_TYPE_MEMORY_ALLOCATION, (UINT16) sizeof (EFI_HOB_MEMORY_ALLOCATION_MODULE)); | |
if (Hob == NULL) { | |
return; | |
} | |
CopyGuid (&(Hob->MemoryAllocationHeader.Name), &gEfiHobMemoryAllocModuleGuid); | |
Hob->MemoryAllocationHeader.MemoryBaseAddress = MemoryAllocationModule; | |
Hob->MemoryAllocationHeader.MemoryLength = ModuleLength; | |
Hob->MemoryAllocationHeader.MemoryType = EfiBootServicesCode; | |
// | |
// Zero the reserved space to match HOB spec | |
// | |
ZeroMem (Hob->MemoryAllocationHeader.Reserved, sizeof (Hob->MemoryAllocationHeader.Reserved)); | |
CopyGuid (&Hob->ModuleName, ModuleName); | |
Hob->EntryPoint = EntryPoint; | |
} | |
/** | |
Builds a HOB that describes a chunk of system memory with Owner GUID. | |
This function builds a HOB that describes a chunk of system memory. | |
It can only be invoked during PEI phase; | |
for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase. | |
If there is no additional space for HOB creation, then ASSERT(). | |
@param ResourceType The type of resource described by this HOB. | |
@param ResourceAttribute The resource attributes of the memory described by this HOB. | |
@param PhysicalStart The 64 bit physical address of memory described by this HOB. | |
@param NumberOfBytes The length of the memory described by this HOB in bytes. | |
@param OwnerGUID GUID for the owner of this resource. | |
**/ | |
VOID | |
EFIAPI | |
BuildResourceDescriptorWithOwnerHob ( | |
IN EFI_RESOURCE_TYPE ResourceType, | |
IN EFI_RESOURCE_ATTRIBUTE_TYPE ResourceAttribute, | |
IN EFI_PHYSICAL_ADDRESS PhysicalStart, | |
IN UINT64 NumberOfBytes, | |
IN EFI_GUID *OwnerGUID | |
) | |
{ | |
EFI_HOB_RESOURCE_DESCRIPTOR *Hob; | |
Hob = InternalPeiCreateHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR, (UINT16) sizeof (EFI_HOB_RESOURCE_DESCRIPTOR)); | |
if (Hob == NULL) { | |
return; | |
} | |
Hob->ResourceType = ResourceType; | |
Hob->ResourceAttribute = ResourceAttribute; | |
Hob->PhysicalStart = PhysicalStart; | |
Hob->ResourceLength = NumberOfBytes; | |
CopyGuid (&Hob->Owner, OwnerGUID); | |
} | |
/** | |
Builds a HOB that describes a chunk of system memory. | |
This function builds a HOB that describes a chunk of system memory. | |
It can only be invoked during PEI phase; | |
for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase. | |
If there is no additional space for HOB creation, then ASSERT(). | |
@param ResourceType The type of resource described by this HOB. | |
@param ResourceAttribute The resource attributes of the memory described by this HOB. | |
@param PhysicalStart The 64 bit physical address of memory described by this HOB. | |
@param NumberOfBytes The length of the memory described by this HOB in bytes. | |
**/ | |
VOID | |
EFIAPI | |
BuildResourceDescriptorHob ( | |
IN EFI_RESOURCE_TYPE ResourceType, | |
IN EFI_RESOURCE_ATTRIBUTE_TYPE ResourceAttribute, | |
IN EFI_PHYSICAL_ADDRESS PhysicalStart, | |
IN UINT64 NumberOfBytes | |
) | |
{ | |
EFI_HOB_RESOURCE_DESCRIPTOR *Hob; | |
Hob = InternalPeiCreateHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR, (UINT16) sizeof (EFI_HOB_RESOURCE_DESCRIPTOR)); | |
if (Hob == NULL) { | |
return; | |
} | |
Hob->ResourceType = ResourceType; | |
Hob->ResourceAttribute = ResourceAttribute; | |
Hob->PhysicalStart = PhysicalStart; | |
Hob->ResourceLength = NumberOfBytes; | |
ZeroMem (&(Hob->Owner), sizeof (EFI_GUID)); | |
} | |
/** | |
Builds a customized HOB tagged with a GUID for identification and returns | |
the start address of GUID HOB data. | |
This function builds a customized HOB tagged with a GUID for identification | |
and returns the start address of GUID HOB data so that caller can fill the customized data. | |
The HOB Header and Name field is already stripped. | |
It can only be invoked during PEI phase; | |
for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase. | |
If Guid is NULL, then ASSERT(). | |
If there is no additional space for HOB creation, then ASSERT(). | |
If DataLength > (0xFFF8 - sizeof (EFI_HOB_GUID_TYPE)), then ASSERT(). | |
HobLength is UINT16 and multiples of 8 bytes, so the max HobLength is 0xFFF8. | |
@param Guid The GUID to tag the customized HOB. | |
@param DataLength The size of the data payload for the GUID HOB. | |
@retval NULL The GUID HOB could not be allocated. | |
@retval others The start address of GUID HOB data. | |
**/ | |
VOID * | |
EFIAPI | |
BuildGuidHob ( | |
IN CONST EFI_GUID *Guid, | |
IN UINTN DataLength | |
) | |
{ | |
EFI_HOB_GUID_TYPE *Hob; | |
// | |
// Make sure Guid is valid | |
// | |
ASSERT (Guid != NULL); | |
// | |
// Make sure that data length is not too long. | |
// | |
ASSERT (DataLength <= (0xFFF8 - sizeof (EFI_HOB_GUID_TYPE))); | |
Hob = InternalPeiCreateHob (EFI_HOB_TYPE_GUID_EXTENSION, (UINT16) (sizeof (EFI_HOB_GUID_TYPE) + DataLength)); | |
if (Hob == NULL) { | |
return Hob; | |
} | |
CopyGuid (&Hob->Name, Guid); | |
return Hob + 1; | |
} | |
/** | |
Builds a customized HOB tagged with a GUID for identification, copies the input data to the HOB | |
data field, and returns the start address of the GUID HOB data. | |
This function builds a customized HOB tagged with a GUID for identification and copies the input | |
data to the HOB data field and returns the start address of the GUID HOB data. It can only be | |
invoked during PEI phase; for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase. | |
The HOB Header and Name field is already stripped. | |
It can only be invoked during PEI phase; | |
for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase. | |
If Guid is NULL, then ASSERT(). | |
If Data is NULL and DataLength > 0, then ASSERT(). | |
If there is no additional space for HOB creation, then ASSERT(). | |
If DataLength > (0xFFF8 - sizeof (EFI_HOB_GUID_TYPE)), then ASSERT(). | |
HobLength is UINT16 and multiples of 8 bytes, so the max HobLength is 0xFFF8. | |
@param Guid The GUID to tag the customized HOB. | |
@param Data The data to be copied into the data field of the GUID HOB. | |
@param DataLength The size of the data payload for the GUID HOB. | |
@retval NULL The GUID HOB could not be allocated. | |
@retval others The start address of GUID HOB data. | |
**/ | |
VOID * | |
EFIAPI | |
BuildGuidDataHob ( | |
IN CONST EFI_GUID *Guid, | |
IN VOID *Data, | |
IN UINTN DataLength | |
) | |
{ | |
VOID *HobData; | |
ASSERT (Data != NULL || DataLength == 0); | |
HobData = BuildGuidHob (Guid, DataLength); | |
if (HobData == NULL) { | |
return HobData; | |
} | |
return CopyMem (HobData, Data, DataLength); | |
} | |
/** | |
Builds a Firmware Volume HOB. | |
This function builds a Firmware Volume HOB. | |
It can only be invoked during PEI phase; | |
for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase. | |
If there is no additional space for HOB creation, then ASSERT(). | |
@param BaseAddress The base address of the Firmware Volume. | |
@param Length The size of the Firmware Volume in bytes. | |
**/ | |
VOID | |
EFIAPI | |
BuildFvHob ( | |
IN EFI_PHYSICAL_ADDRESS BaseAddress, | |
IN UINT64 Length | |
) | |
{ | |
EFI_HOB_FIRMWARE_VOLUME *Hob; | |
Hob = InternalPeiCreateHob (EFI_HOB_TYPE_FV, (UINT16) sizeof (EFI_HOB_FIRMWARE_VOLUME)); | |
if (Hob == NULL) { | |
return; | |
} | |
Hob->BaseAddress = BaseAddress; | |
Hob->Length = Length; | |
} | |
/** | |
Builds a EFI_HOB_TYPE_FV2 HOB. | |
This function builds a EFI_HOB_TYPE_FV2 HOB. | |
It can only be invoked during PEI phase; | |
for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase. | |
If there is no additional space for HOB creation, then ASSERT(). | |
@param BaseAddress The base address of the Firmware Volume. | |
@param Length The size of the Firmware Volume in bytes. | |
@param FvName The name of the Firmware Volume. | |
@param FileName The name of the file. | |
**/ | |
VOID | |
EFIAPI | |
BuildFv2Hob ( | |
IN EFI_PHYSICAL_ADDRESS BaseAddress, | |
IN UINT64 Length, | |
IN CONST EFI_GUID *FvName, | |
IN CONST EFI_GUID *FileName | |
) | |
{ | |
EFI_HOB_FIRMWARE_VOLUME2 *Hob; | |
Hob = InternalPeiCreateHob (EFI_HOB_TYPE_FV2, (UINT16) sizeof (EFI_HOB_FIRMWARE_VOLUME2)); | |
if (Hob == NULL) { | |
return; | |
} | |
Hob->BaseAddress = BaseAddress; | |
Hob->Length = Length; | |
CopyGuid (&Hob->FvName, FvName); | |
CopyGuid (&Hob->FileName, FileName); | |
} | |
/** | |
Builds a Capsule Volume HOB. | |
This function builds a Capsule Volume HOB. | |
It can only be invoked during PEI phase; | |
for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase. | |
If the platform does not support Capsule Volume HOBs, then ASSERT(). | |
If there is no additional space for HOB creation, then ASSERT(). | |
@param BaseAddress The base address of the Capsule Volume. | |
@param Length The size of the Capsule Volume in bytes. | |
**/ | |
VOID | |
EFIAPI | |
BuildCvHob ( | |
IN EFI_PHYSICAL_ADDRESS BaseAddress, | |
IN UINT64 Length | |
) | |
{ | |
EFI_HOB_UEFI_CAPSULE *Hob; | |
Hob = InternalPeiCreateHob (EFI_HOB_TYPE_UEFI_CAPSULE, (UINT16) sizeof (EFI_HOB_UEFI_CAPSULE)); | |
if (Hob == NULL) { | |
return; | |
} | |
Hob->BaseAddress = BaseAddress; | |
Hob->Length = Length; | |
} | |
/** | |
Builds a HOB for the CPU. | |
This function builds a HOB for the CPU. | |
It can only be invoked during PEI phase; | |
for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase. | |
If there is no additional space for HOB creation, then ASSERT(). | |
@param SizeOfMemorySpace The maximum physical memory addressability of the processor. | |
@param SizeOfIoSpace The maximum physical I/O addressability of the processor. | |
**/ | |
VOID | |
EFIAPI | |
BuildCpuHob ( | |
IN UINT8 SizeOfMemorySpace, | |
IN UINT8 SizeOfIoSpace | |
) | |
{ | |
EFI_HOB_CPU *Hob; | |
Hob = InternalPeiCreateHob (EFI_HOB_TYPE_CPU, (UINT16) sizeof (EFI_HOB_CPU)); | |
if (Hob == NULL) { | |
return; | |
} | |
Hob->SizeOfMemorySpace = SizeOfMemorySpace; | |
Hob->SizeOfIoSpace = SizeOfIoSpace; | |
// | |
// Zero the reserved space to match HOB spec | |
// | |
ZeroMem (Hob->Reserved, sizeof (Hob->Reserved)); | |
} | |
/** | |
Builds a HOB for the Stack. | |
This function builds a HOB for the stack. | |
It can only be invoked during PEI phase; | |
for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase. | |
If there is no additional space for HOB creation, then ASSERT(). | |
@param BaseAddress The 64 bit physical address of the Stack. | |
@param Length The length of the stack in bytes. | |
**/ | |
VOID | |
EFIAPI | |
BuildStackHob ( | |
IN EFI_PHYSICAL_ADDRESS BaseAddress, | |
IN UINT64 Length | |
) | |
{ | |
EFI_HOB_MEMORY_ALLOCATION_STACK *Hob; | |
ASSERT (((BaseAddress & (EFI_PAGE_SIZE - 1)) == 0) && | |
((Length & (EFI_PAGE_SIZE - 1)) == 0)); | |
Hob = InternalPeiCreateHob (EFI_HOB_TYPE_MEMORY_ALLOCATION, (UINT16) sizeof (EFI_HOB_MEMORY_ALLOCATION_STACK)); | |
if (Hob == NULL) { | |
return; | |
} | |
CopyGuid (&(Hob->AllocDescriptor.Name), &gEfiHobMemoryAllocStackGuid); | |
Hob->AllocDescriptor.MemoryBaseAddress = BaseAddress; | |
Hob->AllocDescriptor.MemoryLength = Length; | |
Hob->AllocDescriptor.MemoryType = EfiBootServicesData; | |
// | |
// Zero the reserved space to match HOB spec | |
// | |
ZeroMem (Hob->AllocDescriptor.Reserved, sizeof (Hob->AllocDescriptor.Reserved)); | |
} | |
/** | |
Builds a HOB for the BSP store. | |
This function builds a HOB for BSP store. | |
It can only be invoked during PEI phase; | |
for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase. | |
If there is no additional space for HOB creation, then ASSERT(). | |
@param BaseAddress The 64 bit physical address of the BSP. | |
@param Length The length of the BSP store in bytes. | |
@param MemoryType The type of memory allocated by this HOB. | |
**/ | |
VOID | |
EFIAPI | |
BuildBspStoreHob ( | |
IN EFI_PHYSICAL_ADDRESS BaseAddress, | |
IN UINT64 Length, | |
IN EFI_MEMORY_TYPE MemoryType | |
) | |
{ | |
EFI_HOB_MEMORY_ALLOCATION_BSP_STORE *Hob; | |
ASSERT (((BaseAddress & (EFI_PAGE_SIZE - 1)) == 0) && | |
((Length & (EFI_PAGE_SIZE - 1)) == 0)); | |
Hob = InternalPeiCreateHob (EFI_HOB_TYPE_MEMORY_ALLOCATION, (UINT16) sizeof (EFI_HOB_MEMORY_ALLOCATION_BSP_STORE)); | |
if (Hob == NULL) { | |
return; | |
} | |
CopyGuid (&(Hob->AllocDescriptor.Name), &gEfiHobMemoryAllocBspStoreGuid); | |
Hob->AllocDescriptor.MemoryBaseAddress = BaseAddress; | |
Hob->AllocDescriptor.MemoryLength = Length; | |
Hob->AllocDescriptor.MemoryType = MemoryType; | |
// | |
// Zero the reserved space to match HOB spec | |
// | |
ZeroMem (Hob->AllocDescriptor.Reserved, sizeof (Hob->AllocDescriptor.Reserved)); | |
} | |
/** | |
Builds a HOB for the memory allocation. | |
This function builds a HOB for the memory allocation. | |
It can only be invoked during PEI phase; | |
for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase. | |
If there is no additional space for HOB creation, then ASSERT(). | |
@param BaseAddress The 64 bit physical address of the memory. | |
@param Length The length of the memory allocation in bytes. | |
@param MemoryType The type of memory allocated by this HOB. | |
**/ | |
VOID | |
EFIAPI | |
BuildMemoryAllocationHob ( | |
IN EFI_PHYSICAL_ADDRESS BaseAddress, | |
IN UINT64 Length, | |
IN EFI_MEMORY_TYPE MemoryType | |
) | |
{ | |
EFI_HOB_MEMORY_ALLOCATION *Hob; | |
ASSERT (((BaseAddress & (EFI_PAGE_SIZE - 1)) == 0) && | |
((Length & (EFI_PAGE_SIZE - 1)) == 0)); | |
Hob = InternalPeiCreateHob (EFI_HOB_TYPE_MEMORY_ALLOCATION, (UINT16) sizeof (EFI_HOB_MEMORY_ALLOCATION)); | |
if (Hob == NULL) { | |
return; | |
} | |
ZeroMem (&(Hob->AllocDescriptor.Name), sizeof (EFI_GUID)); | |
Hob->AllocDescriptor.MemoryBaseAddress = BaseAddress; | |
Hob->AllocDescriptor.MemoryLength = Length; | |
Hob->AllocDescriptor.MemoryType = MemoryType; | |
// | |
// Zero the reserved space to match HOB spec | |
// | |
ZeroMem (Hob->AllocDescriptor.Reserved, sizeof (Hob->AllocDescriptor.Reserved)); | |
} |