xref: /onnv-gate/usr/src/grub/grub-0.97/docs/multiboot.h.texi (revision 8044:b3af80bbf173)

/* @r{multiboot.h - the header for Multiboot} */
/* @r{Copyright (C) 1999, 2001  Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.} */

/* @r{Macros.} */

/* @r{The magic number for the Multiboot header.} */
#define MULTIBOOT_HEADER_MAGIC          0x1BADB002

/* @r{The flags for the Multiboot header.} */
#ifdef __ELF__
# define MULTIBOOT_HEADER_FLAGS         0x00000003
#else
# define MULTIBOOT_HEADER_FLAGS         0x00010003
#endif

/* @r{The magic number passed by a Multiboot-compliant boot loader.} */
#define MULTIBOOT_BOOTLOADER_MAGIC      0x2BADB002

/* @r{The size of our stack (16KB).} */
#define STACK_SIZE                      0x4000

/* @r{C symbol format. HAVE_ASM_USCORE is defined by configure.} */
#ifdef HAVE_ASM_USCORE
# define EXT_C(sym)                     _ ## sym
#else
# define EXT_C(sym)                     sym
#endif

#ifndef ASM
/* @r{Do not include here in boot.S.} */

/* @r{Types.} */

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

/* @r{The symbol table for a.out.} */
typedef struct aout_symbol_table
@{
  unsigned long tabsize;
  unsigned long strsize;
  unsigned long addr;
  unsigned long reserved;
@} aout_symbol_table_t;

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

/* @r{The Multiboot information.} */
typedef struct multiboot_info
@{
  unsigned long flags;
  unsigned long mem_lower;
  unsigned long mem_upper;
  unsigned long boot_device;
  unsigned long cmdline;
  unsigned long mods_count;
  unsigned long mods_addr;
  union
  @{
    aout_symbol_table_t aout_sym;
    elf_section_header_table_t elf_sec;
  @} u;
  unsigned long mmap_length;
  unsigned long mmap_addr;
@} multiboot_info_t;

/* @r{The module structure.} */
typedef struct module
@{
  unsigned long mod_start;
  unsigned long mod_end;
  unsigned long string;
  unsigned long reserved;
@} module_t;

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

#endif /* @r{! ASM} */