231 lines
6.8 KiB
C
231 lines
6.8 KiB
C
/* SPDX-License-Identifier: Intel */
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/*
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* Copyright (C) 2013, Intel Corporation
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* Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com>
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*/
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#ifndef __HOB_H__
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#define __HOB_H__
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#include <efi.h>
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#include <efi_loader.h>
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/* Type of HOB Header */
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#define HOB_TYPE_MEM_ALLOC 0x0002
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#define HOB_TYPE_RES_DESC 0x0003
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#define HOB_TYPE_GUID_EXT 0x0004
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#define HOB_TYPE_UNUSED 0xFFFE
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#define HOB_TYPE_EOH 0xFFFF
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/* Value of ResourceType in HOB_RES_DESC */
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#define RES_SYS_MEM 0x00000000
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#define RES_MMAP_IO 0x00000001
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#define RES_IO 0x00000002
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#define RES_FW_DEVICE 0x00000003
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#define RES_MMAP_IO_PORT 0x00000004
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#define RES_MEM_RESERVED 0x00000005
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#define RES_IO_RESERVED 0x00000006
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#define RES_MAX_MEM_TYPE 0x00000007
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/*
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* These types can be ORed together as needed.
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*
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* The first three enumerations describe settings
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* The rest of the settings describe capabilities
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*/
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#define RES_ATTR_PRESENT 0x00000001
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#define RES_ATTR_INITIALIZED 0x00000002
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#define RES_ATTR_TESTED 0x00000004
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#define RES_ATTR_SINGLE_BIT_ECC 0x00000008
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#define RES_ATTR_MULTIPLE_BIT_ECC 0x00000010
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#define RES_ATTR_ECC_RESERVED_1 0x00000020
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#define RES_ATTR_ECC_RESERVED_2 0x00000040
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#define RES_ATTR_READ_PROTECTED 0x00000080
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#define RES_ATTR_WRITE_PROTECTED 0x00000100
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#define RES_ATTR_EXECUTION_PROTECTED 0x00000200
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#define RES_ATTR_UNCACHEABLE 0x00000400
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#define RES_ATTR_WRITE_COMBINEABLE 0x00000800
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#define RES_ATTR_WRITE_THROUGH_CACHEABLE 0x00001000
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#define RES_ATTR_WRITE_BACK_CACHEABLE 0x00002000
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#define RES_ATTR_16_BIT_IO 0x00004000
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#define RES_ATTR_32_BIT_IO 0x00008000
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#define RES_ATTR_64_BIT_IO 0x00010000
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#define RES_ATTR_UNCACHED_EXPORTED 0x00020000
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/*
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* Describes the format and size of the data inside the HOB.
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* All HOBs must contain this generic HOB header.
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*/
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struct hob_header {
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u16 type; /* HOB type */
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u16 len; /* HOB length */
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u32 reserved; /* always zero */
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};
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/*
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* Describes all memory ranges used during the HOB producer phase that
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* exist outside the HOB list. This HOB type describes how memory is used,
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* not the physical attributes of memory.
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*/
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struct hob_mem_alloc {
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struct hob_header hdr;
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/*
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* A GUID that defines the memory allocation region's type and purpose,
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* as well as other fields within the memory allocation HOB. This GUID
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* is used to define the additional data within the HOB that may be
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* present for the memory allocation HOB. Type efi_guid_t is defined in
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* InstallProtocolInterface() in the UEFI 2.0 specification.
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*/
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efi_guid_t name;
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/*
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* The base address of memory allocated by this HOB.
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* Type phys_addr_t is defined in AllocatePages() in the UEFI 2.0
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* specification.
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*/
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phys_addr_t mem_base;
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/* The length in bytes of memory allocated by this HOB */
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phys_size_t mem_len;
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/*
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* Defines the type of memory allocated by this HOB.
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* The memory type definition follows the EFI_MEMORY_TYPE definition.
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* Type EFI_MEMORY_TYPE is defined in AllocatePages() in the UEFI 2.0
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* specification.
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*/
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enum efi_memory_type mem_type;
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/* padding */
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u8 reserved[4];
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};
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/*
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* Describes the resource properties of all fixed, nonrelocatable resource
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* ranges found on the processor host bus during the HOB producer phase.
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*/
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struct hob_res_desc {
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struct hob_header hdr;
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/*
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* A GUID representing the owner of the resource. This GUID is
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* used by HOB consumer phase components to correlate device
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* ownership of a resource.
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*/
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efi_guid_t owner;
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u32 type;
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u32 attr;
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/* The physical start address of the resource region */
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phys_addr_t phys_start;
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/* The number of bytes of the resource region */
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phys_size_t len;
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};
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/*
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* Allows writers of executable content in the HOB producer phase to
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* maintain and manage HOBs with specific GUID.
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*/
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struct hob_guid {
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struct hob_header hdr;
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/* A GUID that defines the contents of this HOB */
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efi_guid_t name;
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/* GUID specific data goes here */
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};
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/**
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* get_next_hob() - return a pointer to the next HOB in the HOB list
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*
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* This macro returns a pointer to HOB that follows the HOB specified by hob
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* in the HOB List.
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*
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* @hdr: A pointer to a HOB.
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*
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* Return: A pointer to the next HOB in the HOB list.
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*/
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static inline const struct hob_header *get_next_hob(const struct hob_header
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*hdr)
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{
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return (const struct hob_header *)((uintptr_t)hdr + hdr->len);
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}
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/**
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* end_of_hob() - determine if a HOB is the last HOB in the HOB list
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*
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* This macro determine if the HOB specified by hob is the last HOB in the
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* HOB list. If hob is last HOB in the HOB list, then true is returned.
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* Otherwise, false is returned.
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*
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* @hdr: A pointer to a HOB.
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*
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* Return: true: The HOB specified by hdr is the last HOB in the HOB list.
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* Return: false: The HOB specified by hdr is not the last HOB in the HOB list.
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*/
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static inline bool end_of_hob(const struct hob_header *hdr)
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{
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return hdr->type == HOB_TYPE_EOH;
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}
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/**
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* get_guid_hob_data() - return a pointer to data buffer from a HOB of
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* type HOB_TYPE_GUID_EXT
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*
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* This macro returns a pointer to the data buffer in a HOB specified by hob.
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* hob is assumed to be a HOB of type HOB_TYPE_GUID_EXT.
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*
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* @hdr: A pointer to a HOB.
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*
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* Return: A pointer to the data buffer in a HOB.
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*/
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static inline void *get_guid_hob_data(const struct hob_header *hdr)
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{
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return (void *)((uintptr_t)hdr + sizeof(struct hob_guid));
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}
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/**
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* get_guid_hob_data_size() - return the size of the data buffer from a HOB
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* of type HOB_TYPE_GUID_EXT
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*
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* This macro returns the size, in bytes, of the data buffer in a HOB
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* specified by hob. hob is assumed to be a HOB of type HOB_TYPE_GUID_EXT.
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*
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* @hdr: A pointer to a HOB.
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*
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* Return: The size of the data buffer.
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*/
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static inline u16 get_guid_hob_data_size(const struct hob_header *hdr)
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{
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return hdr->len - sizeof(struct hob_guid);
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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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*
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* @type: HOB type to search
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* @hob_list: A pointer to the HOB list
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*
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* Return: A HOB object with matching type; Otherwise NULL.
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*/
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const struct hob_header *hob_get_next_hob(uint type, const void *hob_list);
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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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*
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* @guid: GUID to search
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* @hob_list: A pointer to the HOB list
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*
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* Return: A HOB object with matching GUID; Otherwise NULL.
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*/
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const struct hob_header *hob_get_next_guid_hob(const efi_guid_t *guid,
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const void *hob_list);
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/**
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* This function retrieves a GUID HOB data buffer and size.
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*
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* @hob_list: A HOB list pointer.
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* @len: A pointer to the GUID HOB data buffer length.
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* If the GUID HOB is located, the length will be updated.
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* @guid A pointer to HOB GUID.
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*
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* Return: NULL: Failed to find the GUID HOB.
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* Return: others: GUID HOB data buffer pointer.
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*/
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void *hob_get_guid_hob_data(const void *hob_list, u32 *len,
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const efi_guid_t *guid);
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#endif /* __HOB_H__ */
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