multiboot.h

/* multiboot.h - Defines used in working with Multiboot-compliant
 * bootloaders (such as GRUB)
 * vim:ts=4 noexpandtab
 */

#ifndef _MULTIBOOT_H
#define _MULTIBOOT_H

#define MULTIBOOT_HEADER_FLAGS         0x00000003
#define MULTIBOOT_HEADER_MAGIC      0x1BADB002
#define MULTIBOOT_BOOTLOADER_MAGIC      0x2BADB002

#ifndef ASM

/* Types */
#include "types.h"

/* The Multiboot header. */
typedef struct multiboot_header
{
	uint32_t magic;
	uint32_t flags;
	uint32_t checksum;
	uint32_t header_addr;
	uint32_t load_addr;
	uint32_t load_end_addr;
	uint32_t bss_end_addr;
	uint32_t entry_addr;
} multiboot_header_t;

/* The section header table for ELF. */
typedef struct elf_section_header_table
{
	uint32_t num;
	uint32_t size;
	uint32_t addr;
	uint32_t shndx;
} elf_section_header_table_t;

/* The Multiboot information. */
typedef struct multiboot_info
{
	uint32_t flags;
	uint32_t mem_lower;
	uint32_t mem_upper;
	uint32_t boot_device;
	uint32_t cmdline;
	uint32_t mods_count;
	uint32_t mods_addr;
	elf_section_header_table_t elf_sec;
	uint32_t mmap_length;
	uint32_t mmap_addr;
} multiboot_info_t;

typedef struct module {
	uint32_t mod_start;
	uint32_t mod_end;
	uint32_t string;
	uint32_t reserved;
} module_t;

/* The memory map. Be careful that the offset 0 is base_addr_low
   but no size. */
typedef struct memory_map
{
	uint32_t size;
	uint32_t base_addr_low;
	uint32_t base_addr_high;
	uint32_t length_low;
	uint32_t length_high;
	uint32_t type;
} memory_map_t;

#endif /* ASM */

#endif /* _MULTIBOOT_H */