multiboot.h

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#ifndef MULTIBOOT_HEADER
#define MULTIBOOT_HEADER 1

#define MULTIBOOT_SEARCH                        8192

#define MULTIBOOT_HEADER_MAGIC                  0x1BADB002

#define MULTIBOOT_BOOTLOADER_MAGIC              0x2BADB002

#define MULTIBOOT_UNSUPPORTED                   0x0000fffc

#define MULTIBOOT_MOD_ALIGN                     0x00001000

#define MULTIBOOT_INFO_ALIGN                    0x00000004

#define MULTIBOOT_PAGE_ALIGN                    0x00000001

#define MULTIBOOT_MEMORY_INFO                   0x00000002

#define MULTIBOOT_VIDEO_MODE                    0x00000004

#define MULTIBOOT_AOUT_KLUDGE                   0x00010000

/* Flags to be set in the 'flags' member of the multiboot info structure. */

#define MULTIBOOT_INFO_MEMORY                   0x00000001

#define MULTIBOOT_INFO_BOOTDEV                  0x00000002

#define MULTIBOOT_INFO_CMDLINE                  0x00000004

#define MULTIBOOT_INFO_MODS                     0x00000008

/* These next two are mutually exclusive */

#define MULTIBOOT_INFO_AOUT_SYMS                0x00000010

#define MULTIBOOT_INFO_ELF_SHDR                 0X00000020

#define MULTIBOOT_INFO_MEM_MAP                  0x00000040

#define MULTIBOOT_INFO_DRIVE_INFO               0x00000080

#define MULTIBOOT_INFO_CONFIG_TABLE             0x00000100

#define MULTIBOOT_INFO_BOOT_LOADER_NAME         0x00000200

#define MULTIBOOT_INFO_APM_TABLE                0x00000400

#define MULTIBOOT_INFO_VIDEO_INFO               0x00000800

#ifndef ASM_FILE

typedef unsigned short          multiboot_uint16_t;
typedef unsigned int            multiboot_uint32_t;
typedef unsigned long long      multiboot_uint64_t;

struct multiboot_header
{
        multiboot_uint32_t magic; 
        multiboot_uint32_t flags; 
        multiboot_uint32_t checksum;

        multiboot_uint32_t header_addr;
        multiboot_uint32_t load_addr;
        multiboot_uint32_t load_end_addr;
        multiboot_uint32_t bss_end_addr;
        multiboot_uint32_t entry_addr;

        multiboot_uint32_t mode_type;
        multiboot_uint32_t width;
        multiboot_uint32_t height;
        multiboot_uint32_t depth;
};

struct multiboot_aout_symbol_table
{
        multiboot_uint32_t tabsize;
        multiboot_uint32_t strsize;
        multiboot_uint32_t addr;
        multiboot_uint32_t reserved;
};
typedef struct multiboot_aout_symbol_table multiboot_aout_symbol_table_t;

struct multiboot_elf_section_header_table
{
        multiboot_uint32_t num;
        multiboot_uint32_t size;
        multiboot_uint32_t addr;
        multiboot_uint32_t shndx;
};
typedef struct multiboot_elf_section_header_table multiboot_elf_section_header_table_t;

struct multiboot_info
{
        multiboot_uint32_t flags; 
        /* Available memory from BIOS */
        multiboot_uint32_t mem_lower;
        multiboot_uint32_t mem_upper;

        multiboot_uint32_t boot_device; 
        multiboot_uint32_t cmdline; 
        multiboot_uint32_t mods_count;
        multiboot_uint32_t mods_addr;

        union
        {
                 multiboot_aout_symbol_table_t aout_sym;
                 multiboot_elf_section_header_table_t elf_sec;
        } syms;

        multiboot_uint32_t mmap_length;
        multiboot_uint32_t mmap_addr;

        multiboot_uint32_t drives_length;
        multiboot_uint32_t drives_addr;

        multiboot_uint32_t config_table; 
        multiboot_uint32_t boot_loader_name; 
        multiboot_uint32_t apm_table; 
        multiboot_uint32_t vbe_control_info;
        multiboot_uint32_t vbe_mode_info;
        multiboot_uint16_t vbe_mode;
        multiboot_uint16_t vbe_interface_seg;
        multiboot_uint16_t vbe_interface_off;
        multiboot_uint16_t vbe_interface_len;
};
typedef struct multiboot_info multiboot_info_t;

struct multiboot_mmap_entry
{
        multiboot_uint32_t size;
        multiboot_uint64_t addr;
        multiboot_uint64_t len;
        #define MULTIBOOT_MEMORY_AVAILABLE              1
        #define MULTIBOOT_MEMORY_RESERVED               2
        multiboot_uint32_t type;
} __attribute__((packed));
typedef struct multiboot_mmap_entry multiboot_memory_map_t;

struct multiboot_mod_list
{
        /* the memory used goes from bytes 'mod_start' to 'mod_end-1' inclusive */
        multiboot_uint32_t mod_start;
        multiboot_uint32_t mod_end;

        multiboot_uint32_t cmdline; 
        multiboot_uint32_t pad; 
};
typedef struct multiboot_mod_list multiboot_module_t;

#endif /* ! ASM_FILE */

#endif /* ! MULTIBOOT_HEADER */