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#ifndef _MULTIBOOT_H
#define _MULTIBOOT_H
/**
* @file
*
* Multiboot operating systems
*
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <stdint.h>
/** The magic number for the Multiboot header */
#define MULTIBOOT_HEADER_MAGIC 0x1BADB002
/** Boot modules must be page aligned */
#define MB_FLAG_PGALIGN 0x00000001
/** Memory map must be provided */
#define MB_FLAG_MEMMAP 0x00000002
/** Video mode information must be provided */
#define MB_FLAG_VIDMODE 0x00000004
/** Image is a raw multiboot image (not ELF) */
#define MB_FLAG_RAW 0x00010000
/**
* The magic number passed by a Multiboot-compliant boot loader
*
* Must be passed in register %eax when jumping to the Multiboot OS
* image.
*/
#define MULTIBOOT_BOOTLOADER_MAGIC 0x2BADB002
/** Multiboot information structure mem_* fields are valid */
#define MBI_FLAG_MEM 0x00000001
/** Multiboot information structure boot_device field is valid */
#define MBI_FLAG_BOOTDEV 0x00000002
/** Multiboot information structure cmdline field is valid */
#define MBI_FLAG_CMDLINE 0x00000004
/** Multiboot information structure module fields are valid */
#define MBI_FLAG_MODS 0x00000008
/** Multiboot information structure a.out symbol table is valid */
#define MBI_FLAG_AOUT 0x00000010
/** Multiboot information struture ELF section header table is valid */
#define MBI_FLAG_ELF 0x00000020
/** Multiboot information structure memory map is valid */
#define MBI_FLAG_MMAP 0x00000040
/** Multiboot information structure drive list is valid */
#define MBI_FLAG_DRIVES 0x00000080
/** Multiboot information structure ROM configuration field is valid */
#define MBI_FLAG_CFGTBL 0x00000100
/** Multiboot information structure boot loader name field is valid */
#define MBI_FLAG_LOADER 0x00000200
/** Multiboot information structure APM table is valid */
#define MBI_FLAG_APM 0x00000400
/** Multiboot information structure video information is valid */
#define MBI_FLAG_VBE 0x00000800
/** A multiboot header */
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;
} __attribute__ (( packed, may_alias ));
/** A multiboot a.out symbol table */
struct multiboot_aout_symbol_table {
uint32_t tabsize;
uint32_t strsize;
uint32_t addr;
uint32_t reserved;
} __attribute__ (( packed, may_alias ));
/** A multiboot ELF section header table */
struct multiboot_elf_section_header_table {
uint32_t num;
uint32_t size;
uint32_t addr;
uint32_t shndx;
} __attribute__ (( packed, may_alias ));
/** A multiboot information structure */
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;
union {
struct multiboot_aout_symbol_table aout_syms;
struct multiboot_elf_section_header_table elf_sections;
} syms;
uint32_t mmap_length;
uint32_t mmap_addr;
uint32_t drives_length;
uint32_t drives_addr;
uint32_t config_table;
uint32_t boot_loader_name;
uint32_t apm_table;
uint32_t vbe_control_info;
uint32_t vbe_mode_info;
uint16_t vbe_mode;
uint16_t vbe_interface_seg;
uint16_t vbe_interface_off;
uint16_t vbe_interface_len;
} __attribute__ (( packed, may_alias ));
/** A multiboot module structure */
struct multiboot_module {
uint32_t mod_start;
uint32_t mod_end;
uint32_t string;
uint32_t reserved;
} __attribute__ (( packed, may_alias ));
/** A multiboot memory map entry */
struct multiboot_memory_map {
uint32_t size;
uint64_t base_addr;
uint64_t length;
uint32_t type;
} __attribute__ (( packed, may_alias ));
/** Usable RAM */
#define MBMEM_RAM 1
#endif /* _MULTIBOOT_H */
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