/** @file
Instance of HOB Library using PEI Services.
HOB Library implementation that uses PEI Services to retrieve the HOB List.
This library instance uses EFI_HOB_TYPE_CV defined in Intel framework HOB specification v0.9
to implement HobLib BuildCvHob() API.
Copyright (c) 2007 - 2016, 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 <FrameworkPei.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 info 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 info 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 >= (0x10000 - sizeof (EFI_HOB_GUID_TYPE)), then ASSERT().
@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 <= (0xffff - 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 >= (0x10000 - sizeof (EFI_HOB_GUID_TYPE)), then ASSERT().
@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);
}
/**
Check FV alignment.
@param BaseAddress The base address of the Firmware Volume.
@param Length The size of the Firmware Volume in bytes.
@retval TRUE FvImage buffer is at its required alignment.
@retval FALSE FvImage buffer is not at its required alignment.
**/
BOOLEAN
InternalCheckFvAlignment (
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length
)
{
EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;
UINT32 FvAlignment;
FvAlignment = 0;
FwVolHeader = (EFI_FIRMWARE_VOLUME_HEADER *) (UINTN) BaseAddress;
//
// If EFI_FVB2_WEAK_ALIGNMENT is set in the volume header then the first byte of the volume
// can be aligned on any power-of-two boundary. A weakly aligned volume can not be moved from
// its initial linked location and maintain its alignment.
//
if ((FwVolHeader->Attributes & EFI_FVB2_WEAK_ALIGNMENT) != EFI_FVB2_WEAK_ALIGNMENT) {
//
// Get FvHeader alignment
//
FvAlignment = 1 << ((FwVolHeader->Attributes & EFI_FVB2_ALIGNMENT) >> 16);
//
// FvAlignment must be greater than or equal to 8 bytes of the minimum FFS alignment value.
//
if (FvAlignment < 8) {
FvAlignment = 8;
}
if ((UINTN)BaseAddress % FvAlignment != 0) {
//
// FvImage buffer is not at its required alignment.
//
DEBUG ((
DEBUG_ERROR,
"Unaligned FvImage found at 0x%lx:0x%lx, the required alignment is 0x%x\n",
BaseAddress,
Length,
FvAlignment
));
return FALSE;
}
}
return TRUE;
}
/**
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().
If the FvImage buffer is not at its required alignment, 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;
if (!InternalCheckFvAlignment (BaseAddress, Length)) {
ASSERT (FALSE);
return;
}
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().
If the FvImage buffer is not at its required alignment, 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;
if (!InternalCheckFvAlignment (BaseAddress, Length)) {
ASSERT (FALSE);
return;
}
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_CAPSULE_VOLUME *Hob;
Hob = InternalPeiCreateHob (EFI_HOB_TYPE_CV, (UINT16) sizeof (EFI_HOB_CAPSULE_VOLUME));
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 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 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));
}