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561 lines
19 KiB
C
561 lines
19 KiB
C
/** @file
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Provides services to create and parse HOBs. Only available for PEI
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and DXE module types.
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The HOB Library supports the efficient creation and searching of HOBs
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defined in the PI Specification.
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A HOB is a Hand-Off Block, defined in the Framework architecture, that
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allows the PEI phase to pass information to the DXE phase. HOBs are position
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independent and can be relocated easily to different memory locations.
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Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef __HOB_LIB_H__
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#define __HOB_LIB_H__
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/**
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Returns the pointer to the HOB list.
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This function returns the pointer to first HOB in the list.
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For PEI phase, the PEI service GetHobList() can be used to retrieve the pointer
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to the HOB list. For the DXE phase, the HOB list pointer can be retrieved through
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the EFI System Table by looking up theHOB list GUID in the System Configuration Table.
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Since the System Configuration Table does not exist that the time the DXE Core is
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launched, the DXE Core uses a global variable from the DXE Core Entry Point Library
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to manage the pointer to the HOB list.
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If the pointer to the HOB list is NULL, then ASSERT().
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@return The pointer to the HOB list.
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**/
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VOID *
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EFIAPI
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GetHobList (
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VOID
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);
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/**
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Returns the next instance of a HOB type from the starting HOB.
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This function searches the first instance of a HOB type from the starting HOB pointer.
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If there does not exist such HOB type from the starting HOB pointer, it will return NULL.
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In contrast with macro GET_NEXT_HOB(), this function does not skip the starting HOB pointer
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unconditionally: it returns HobStart back if HobStart itself meets the requirement;
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caller is required to use GET_NEXT_HOB() if it wishes to skip current HobStart.
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If HobStart is NULL, then ASSERT().
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@param Type The HOB type to return.
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@param HobStart The starting HOB pointer to search from.
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@return The next instance of a HOB type from the starting HOB.
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**/
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VOID *
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EFIAPI
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GetNextHob (
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IN UINT16 Type,
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IN CONST VOID *HobStart
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);
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/**
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Returns the first instance of a HOB type among the whole HOB list.
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This function searches the first instance of a HOB type among the whole HOB list.
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If there does not exist such HOB type in the HOB list, it will return NULL.
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If the pointer to the HOB list is NULL, then ASSERT().
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@param Type The HOB type to return.
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@return The next instance of a HOB type from the starting HOB.
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**/
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VOID *
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EFIAPI
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GetFirstHob (
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IN UINT16 Type
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);
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/**
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Returns the next instance of the matched GUID HOB from the starting HOB.
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This function searches the first instance of a HOB from the starting HOB pointer.
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Such HOB should satisfy two conditions:
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its HOB type is EFI_HOB_TYPE_GUID_EXTENSION and its GUID Name equals to the input Guid.
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If there does not exist such HOB from the starting HOB pointer, it will return NULL.
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Caller is required to apply GET_GUID_HOB_DATA () and GET_GUID_HOB_DATA_SIZE ()
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to extract the data section and its size info respectively.
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In contrast with macro GET_NEXT_HOB(), this function does not skip the starting HOB pointer
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unconditionally: it returns HobStart back if HobStart itself meets the requirement;
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caller is required to use GET_NEXT_HOB() if it wishes to skip current HobStart.
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If Guid is NULL, then ASSERT().
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If HobStart is NULL, then ASSERT().
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@param Guid The GUID to match with in the HOB list.
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@param HobStart A pointer to a Guid.
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@return The next instance of the matched GUID HOB from the starting HOB.
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**/
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VOID *
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EFIAPI
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GetNextGuidHob (
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IN CONST EFI_GUID *Guid,
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IN CONST VOID *HobStart
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);
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/**
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Returns the first instance of the matched GUID HOB among the whole HOB list.
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This function searches the first instance of a HOB among the whole HOB list.
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Such HOB should satisfy two conditions:
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its HOB type is EFI_HOB_TYPE_GUID_EXTENSION and its GUID Name equals to the input Guid.
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If there does not exist such HOB from the starting HOB pointer, it will return NULL.
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Caller is required to apply GET_GUID_HOB_DATA () and GET_GUID_HOB_DATA_SIZE ()
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to extract the data section and its size info respectively.
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If the pointer to the HOB list is NULL, then ASSERT().
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If Guid is NULL, then ASSERT().
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@param Guid The GUID to match with in the HOB list.
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@return The first instance of the matched GUID HOB among the whole HOB list.
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**/
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VOID *
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EFIAPI
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GetFirstGuidHob (
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IN CONST EFI_GUID *Guid
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);
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/**
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Get the system boot mode from the HOB list.
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This function returns the system boot mode information from the
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PHIT HOB in HOB list.
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If the pointer to the HOB list is NULL, then ASSERT().
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@param VOID
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@return The Boot Mode.
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**/
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EFI_BOOT_MODE
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EFIAPI
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GetBootModeHob (
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VOID
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);
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/**
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Builds a HOB for a loaded PE32 module.
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This function builds a HOB for a loaded PE32 module.
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It can only be invoked during PEI phase;
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for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
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If ModuleName is NULL, then ASSERT().
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If there is no additional space for HOB creation, then ASSERT().
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@param ModuleName The GUID File Name of the module.
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@param MemoryAllocationModule The 64 bit physical address of the module.
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@param ModuleLength The length of the module in bytes.
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@param EntryPoint The 64 bit physical address of the module entry point.
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**/
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VOID
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EFIAPI
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BuildModuleHob (
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IN CONST EFI_GUID *ModuleName,
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IN EFI_PHYSICAL_ADDRESS MemoryAllocationModule,
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IN UINT64 ModuleLength,
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IN EFI_PHYSICAL_ADDRESS EntryPoint
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);
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/**
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Builds a HOB that describes a chunk of system memory with Owner GUID.
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This function builds a HOB that describes a chunk of system memory.
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It can only be invoked during PEI phase;
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for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
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If there is no additional space for HOB creation, then ASSERT().
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@param ResourceType The type of resource described by this HOB.
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@param ResourceAttribute The resource attributes of the memory described by this HOB.
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@param PhysicalStart The 64 bit physical address of memory described by this HOB.
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@param NumberOfBytes The length of the memory described by this HOB in bytes.
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@param OwnerGUID GUID for the owner of this resource.
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**/
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VOID
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EFIAPI
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BuildResourceDescriptorWithOwnerHob (
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IN EFI_RESOURCE_TYPE ResourceType,
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IN EFI_RESOURCE_ATTRIBUTE_TYPE ResourceAttribute,
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IN EFI_PHYSICAL_ADDRESS PhysicalStart,
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IN UINT64 NumberOfBytes,
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IN EFI_GUID *OwnerGUID
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);
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/**
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Builds a HOB that describes a chunk of system memory.
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This function builds a HOB that describes a chunk of system memory.
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It can only be invoked during PEI phase;
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for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
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If there is no additional space for HOB creation, then ASSERT().
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@param ResourceType The type of resource described by this HOB.
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@param ResourceAttribute The resource attributes of the memory described by this HOB.
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@param PhysicalStart The 64 bit physical address of memory described by this HOB.
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@param NumberOfBytes The length of the memory described by this HOB in bytes.
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**/
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VOID
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EFIAPI
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BuildResourceDescriptorHob (
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IN EFI_RESOURCE_TYPE ResourceType,
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IN EFI_RESOURCE_ATTRIBUTE_TYPE ResourceAttribute,
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IN EFI_PHYSICAL_ADDRESS PhysicalStart,
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IN UINT64 NumberOfBytes
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);
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/**
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Builds a customized HOB tagged with a GUID for identification and returns
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the start address of GUID HOB data.
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This function builds a customized HOB tagged with a GUID for identification
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and returns the start address of GUID HOB data so that caller can fill the customized data.
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The HOB Header and Name field is already stripped.
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It can only be invoked during PEI phase;
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for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
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If Guid is NULL, then ASSERT().
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If there is no additional space for HOB creation, then ASSERT().
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If DataLength > (0xFFF8 - sizeof (EFI_HOB_GUID_TYPE)), then ASSERT().
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HobLength is UINT16 and multiples of 8 bytes, so the max HobLength is 0xFFF8.
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@param Guid The GUID to tag the customized HOB.
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@param DataLength The size of the data payload for the GUID HOB.
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@retval NULL The GUID HOB could not be allocated.
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@retval others The start address of GUID HOB data.
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**/
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VOID *
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EFIAPI
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BuildGuidHob (
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IN CONST EFI_GUID *Guid,
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IN UINTN DataLength
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);
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/**
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Builds a customized HOB tagged with a GUID for identification, copies the input data to the HOB
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data field, and returns the start address of the GUID HOB data.
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This function builds a customized HOB tagged with a GUID for identification and copies the input
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data to the HOB data field and returns the start address of the GUID HOB data. It can only be
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invoked during PEI phase; for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
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The HOB Header and Name field is already stripped.
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It can only be invoked during PEI phase;
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for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
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If Guid is NULL, then ASSERT().
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If Data is NULL and DataLength > 0, then ASSERT().
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If there is no additional space for HOB creation, then ASSERT().
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If DataLength > (0xFFF8 - sizeof (EFI_HOB_GUID_TYPE)), then ASSERT().
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HobLength is UINT16 and multiples of 8 bytes, so the max HobLength is 0xFFF8.
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@param Guid The GUID to tag the customized HOB.
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@param Data The data to be copied into the data field of the GUID HOB.
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@param DataLength The size of the data payload for the GUID HOB.
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@retval NULL The GUID HOB could not be allocated.
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@retval others The start address of GUID HOB data.
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**/
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VOID *
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EFIAPI
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BuildGuidDataHob (
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IN CONST EFI_GUID *Guid,
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IN VOID *Data,
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IN UINTN DataLength
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);
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/**
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Builds a Firmware Volume HOB.
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This function builds a Firmware Volume HOB.
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It can only be invoked during PEI phase;
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for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
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If there is no additional space for HOB creation, then ASSERT().
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If the FvImage buffer is not at its required alignment, then ASSERT().
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@param BaseAddress The base address of the Firmware Volume.
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@param Length The size of the Firmware Volume in bytes.
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**/
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VOID
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EFIAPI
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BuildFvHob (
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IN EFI_PHYSICAL_ADDRESS BaseAddress,
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IN UINT64 Length
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);
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/**
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Builds a EFI_HOB_TYPE_FV2 HOB.
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This function builds a EFI_HOB_TYPE_FV2 HOB.
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It can only be invoked during PEI phase;
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for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
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If there is no additional space for HOB creation, then ASSERT().
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If the FvImage buffer is not at its required alignment, then ASSERT().
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@param BaseAddress The base address of the Firmware Volume.
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@param Length The size of the Firmware Volume in bytes.
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@param FvName The name of the Firmware Volume.
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@param FileName The name of the file.
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**/
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VOID
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EFIAPI
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BuildFv2Hob (
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IN EFI_PHYSICAL_ADDRESS BaseAddress,
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IN UINT64 Length,
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IN CONST EFI_GUID *FvName,
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IN CONST EFI_GUID *FileName
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);
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/**
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Builds a EFI_HOB_TYPE_FV3 HOB.
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This function builds a EFI_HOB_TYPE_FV3 HOB.
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It can only be invoked during PEI phase;
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for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
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If there is no additional space for HOB creation, then ASSERT().
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If the FvImage buffer is not at its required alignment, then ASSERT().
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@param BaseAddress The base address of the Firmware Volume.
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@param Length The size of the Firmware Volume in bytes.
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@param AuthenticationStatus The authentication status.
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@param ExtractedFv TRUE if the FV was extracted as a file within
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another firmware volume. FALSE otherwise.
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@param FvName The name of the Firmware Volume.
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Valid only if IsExtractedFv is TRUE.
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@param FileName The name of the file.
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Valid only if IsExtractedFv is TRUE.
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**/
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VOID
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EFIAPI
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BuildFv3Hob (
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IN EFI_PHYSICAL_ADDRESS BaseAddress,
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IN UINT64 Length,
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IN UINT32 AuthenticationStatus,
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IN BOOLEAN ExtractedFv,
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IN CONST EFI_GUID *FvName, OPTIONAL
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IN CONST EFI_GUID *FileName OPTIONAL
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);
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/**
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Builds a Capsule Volume HOB.
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This function builds a Capsule Volume HOB.
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It can only be invoked during PEI phase;
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for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
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If the platform does not support Capsule Volume HOBs, then ASSERT().
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If there is no additional space for HOB creation, then ASSERT().
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@param BaseAddress The base address of the Capsule Volume.
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@param Length The size of the Capsule Volume in bytes.
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**/
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VOID
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EFIAPI
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BuildCvHob (
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IN EFI_PHYSICAL_ADDRESS BaseAddress,
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IN UINT64 Length
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);
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/**
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Builds a HOB for the CPU.
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This function builds a HOB for the CPU.
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It can only be invoked during PEI phase;
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for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
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If there is no additional space for HOB creation, then ASSERT().
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@param SizeOfMemorySpace The maximum physical memory addressability of the processor.
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@param SizeOfIoSpace The maximum physical I/O addressability of the processor.
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**/
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VOID
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EFIAPI
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BuildCpuHob (
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IN UINT8 SizeOfMemorySpace,
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IN UINT8 SizeOfIoSpace
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);
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/**
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Builds a HOB for the Stack.
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This function builds a HOB for the stack.
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It can only be invoked during PEI phase;
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for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
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If there is no additional space for HOB creation, then ASSERT().
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@param BaseAddress The 64 bit physical address of the Stack.
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@param Length The length of the stack in bytes.
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**/
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VOID
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EFIAPI
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BuildStackHob (
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IN EFI_PHYSICAL_ADDRESS BaseAddress,
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IN UINT64 Length
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);
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/**
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Builds a HOB for the BSP store.
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This function builds a HOB for BSP store.
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It can only be invoked during PEI phase;
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for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
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If there is no additional space for HOB creation, then ASSERT().
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@param BaseAddress The 64 bit physical address of the BSP.
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@param Length The length of the BSP store in bytes.
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@param MemoryType Type of memory allocated by this HOB.
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**/
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VOID
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EFIAPI
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BuildBspStoreHob (
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IN EFI_PHYSICAL_ADDRESS BaseAddress,
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IN UINT64 Length,
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IN EFI_MEMORY_TYPE MemoryType
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);
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/**
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Builds a HOB for the memory allocation.
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This function builds a HOB for the memory allocation.
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It can only be invoked during PEI phase;
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for DXE phase, it will ASSERT() since PEI HOB is read-only for DXE phase.
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If there is no additional space for HOB creation, then ASSERT().
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@param BaseAddress The 64 bit physical address of the memory.
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@param Length The length of the memory allocation in bytes.
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@param MemoryType Type of memory allocated by this HOB.
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**/
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VOID
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EFIAPI
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BuildMemoryAllocationHob (
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IN EFI_PHYSICAL_ADDRESS BaseAddress,
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IN UINT64 Length,
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IN EFI_MEMORY_TYPE MemoryType
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);
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/**
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Returns the type of a HOB.
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This macro returns the HobType field from the HOB header for the
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HOB specified by HobStart.
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@param HobStart A pointer to a HOB.
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@return HobType.
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**/
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#define GET_HOB_TYPE(HobStart) \
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((*(EFI_HOB_GENERIC_HEADER **)&(HobStart))->HobType)
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/**
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Returns the length, in bytes, of a HOB.
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This macro returns the HobLength field from the HOB header for the
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HOB specified by HobStart.
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@param HobStart A pointer to a HOB.
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@return HobLength.
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**/
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#define GET_HOB_LENGTH(HobStart) \
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((*(EFI_HOB_GENERIC_HEADER **)&(HobStart))->HobLength)
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/**
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Returns a pointer to the next HOB in the HOB list.
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This macro returns a pointer to HOB that follows the
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HOB specified by HobStart in the HOB List.
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@param HobStart A pointer to a HOB.
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@return A pointer to the next HOB in the HOB list.
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**/
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#define GET_NEXT_HOB(HobStart) \
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(VOID *)(*(UINT8 **)&(HobStart) + GET_HOB_LENGTH (HobStart))
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/**
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Determines if a HOB is the last HOB in the HOB list.
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This macro determine if the HOB specified by HobStart is the
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last HOB in the HOB list. If HobStart is last HOB in the HOB list,
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then TRUE is returned. Otherwise, FALSE is returned.
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@param HobStart A pointer to a HOB.
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@retval TRUE The HOB specified by HobStart is the last HOB in the HOB list.
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@retval FALSE The HOB specified by HobStart is not the last HOB in the HOB list.
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**/
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#define END_OF_HOB_LIST(HobStart) (GET_HOB_TYPE (HobStart) == (UINT16)EFI_HOB_TYPE_END_OF_HOB_LIST)
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/**
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Returns a pointer to data buffer from a HOB of type EFI_HOB_TYPE_GUID_EXTENSION.
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This macro returns a pointer to the data buffer in a HOB specified by HobStart.
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HobStart is assumed to be a HOB of type EFI_HOB_TYPE_GUID_EXTENSION.
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@param GuidHob A pointer to a HOB.
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@return A pointer to the data buffer in a HOB.
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**/
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#define GET_GUID_HOB_DATA(HobStart) \
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(VOID *)(*(UINT8 **)&(HobStart) + sizeof (EFI_HOB_GUID_TYPE))
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/**
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Returns the size of the data buffer from a HOB of type EFI_HOB_TYPE_GUID_EXTENSION.
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This macro returns the size, in bytes, of the data buffer in a HOB specified by HobStart.
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HobStart is assumed to be a HOB of type EFI_HOB_TYPE_GUID_EXTENSION.
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@param GuidHob A pointer to a HOB.
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@return The size of the data buffer.
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**/
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#define GET_GUID_HOB_DATA_SIZE(HobStart) \
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(UINT16)(GET_HOB_LENGTH (HobStart) - sizeof (EFI_HOB_GUID_TYPE))
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#endif
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