150 lines
3.9 KiB
C
150 lines
3.9 KiB
C
/*
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* Copyright 2010 Stefan Lankes, Chair for Operating Systems,
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* RWTH Aachen University
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* This file is part of MetalSVM.
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*/
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/**
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* @author Stefan Lankes
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* @file arch/x86/include/asm/multiboot.h
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* @brief Structures related to the Multiboot interface
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*
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* MetalSVM is able to use Multiboot (http://www.gnu.org/software/grub/manual/multiboot/),
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* which specifies an interface between a boot loader and a operating system.\n
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* \n
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* This file contains several structures needed to match the interface.
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*/
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#ifndef __ARCH_MULTIBOOT_H__
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#define __ARCH_MULTIBOOT_H__
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#include <metalsvm/stddef.h>
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#ifdef CONFIG_MULTIBOOT
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/// Does the bootloader provide mem_* fields?
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#define MULTIBOOT_INFO_MEM (1 << 0)
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/// Does the bootloader provide a list of modules?
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#define MULTIBOOT_INFO_MODS (1 << 3)
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/// Does the bootloader provide a full memory map?
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#define MULTIBOOT_INFO_MEM_MAP (1 << 6)
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typedef uint16_t multiboot_uint16_t;
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typedef uint32_t multiboot_uint32_t;
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typedef uint64_t multiboot_uint64_t;
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/** The symbol table for a.out. */
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struct multiboot_aout_symbol_table
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{
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multiboot_uint32_t tabsize;
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multiboot_uint32_t strsize;
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multiboot_uint32_t addr;
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multiboot_uint32_t reserved;
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};
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typedef struct multiboot_aout_symbol_table multiboot_aout_symbol_table_t;
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/** The section header table for ELF. */
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struct multiboot_elf_section_header_table
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{
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multiboot_uint32_t num;
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multiboot_uint32_t size;
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multiboot_uint32_t addr;
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multiboot_uint32_t shndx;
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};
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typedef struct multiboot_elf_section_header_table multiboot_elf_section_header_table_t;
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struct multiboot_info
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{
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/** Multiboot info version number */
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multiboot_uint32_t flags;
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/** Available memory from BIOS */
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multiboot_uint32_t mem_lower;
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multiboot_uint32_t mem_upper;
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/** "root" partition */
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multiboot_uint32_t boot_device;
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/** Kernel command line */
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multiboot_uint32_t cmdline;
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/** Boot-Module list */
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multiboot_uint32_t mods_count;
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multiboot_uint32_t mods_addr;
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union
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{
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multiboot_aout_symbol_table_t aout_sym;
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multiboot_elf_section_header_table_t elf_sec;
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} u;
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/** Memory Mapping buffer */
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multiboot_uint32_t mmap_length;
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multiboot_uint32_t mmap_addr;
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/** Drive Info buffer */
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multiboot_uint32_t drives_length;
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multiboot_uint32_t drives_addr;
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/** ROM configuration table */
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multiboot_uint32_t config_table;
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/** Boot Loader Name */
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multiboot_uint32_t boot_loader_name;
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/** APM table */
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multiboot_uint32_t apm_table;
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/** Video */
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multiboot_uint32_t vbe_control_info;
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multiboot_uint32_t vbe_mode_info;
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multiboot_uint16_t vbe_mode;
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multiboot_uint16_t vbe_interface_seg;
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multiboot_uint16_t vbe_interface_off;
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multiboot_uint16_t vbe_interface_len;
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};
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typedef struct multiboot_info multiboot_info_t;
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struct multiboot_mmap_entry
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{
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multiboot_uint32_t size;
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multiboot_uint64_t addr;
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multiboot_uint64_t len;
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#define MULTIBOOT_MEMORY_AVAILABLE 1
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#define MULTIBOOT_MEMORY_RESERVED 2
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multiboot_uint32_t type;
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} __attribute__((packed));
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typedef struct multiboot_mmap_entry multiboot_memory_map_t;
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struct multiboot_mod_list
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{
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/** the memory used goes from bytes ’mod start’ to ’mod end-1’ inclusive */
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multiboot_uint32_t mod_start;
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multiboot_uint32_t mod_end;
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/** Module command line */
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multiboot_uint32_t cmdline;
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/** padding to take it to 16 bytes (must be zero) */
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multiboot_uint32_t pad;
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};
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typedef struct multiboot_mod_list multiboot_module_t;
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extern multiboot_info_t* mb_info;
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#endif
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#endif
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