1/* multiboot.h - the header for Multiboot */
2/* Copyright (C) 1999, 2001  Free Software Foundation, Inc.
3
4   This program is free software; you can redistribute it and/or modify
5   it under the terms of the GNU General Public License as published by
6   the Free Software Foundation; either version 2 of the License, or
7   (at your option) any later version.
8
9   This program is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12   GNU General Public License for more details.
13
14   You should have received a copy of the GNU General Public License
15   along with this program; if not, write to the Free Software
16   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
17
18/* Macros.  */
19
20/* The magic number for the Multiboot header.  */
21#define MULTIBOOT_HEADER_MAGIC		0x1BADB002
22
23/* The flags for the Multiboot header.  */
24#ifdef __ELF__
25# define MULTIBOOT_HEADER_FLAGS		0x00000003
26#else
27# define MULTIBOOT_HEADER_FLAGS		0x00010003
28#endif
29
30/* The magic number passed by a Multiboot-compliant boot loader.  */
31#define MULTIBOOT_BOOTLOADER_MAGIC	0x2BADB002
32
33/* The size of our stack (16KB).  */
34#define STACK_SIZE			0x4000
35
36/* C symbol format. HAVE_ASM_USCORE is defined by configure.  */
37#ifdef HAVE_ASM_USCORE
38# define EXT_C(sym)			_ ## sym
39#else
40# define EXT_C(sym)			sym
41#endif
42
43#ifndef ASM
44/* Do not include here in boot.S.  */
45
46/* Types.  */
47
48/* The Multiboot header.  */
49typedef struct multiboot_header
50{
51  unsigned long magic;
52  unsigned long flags;
53  unsigned long checksum;
54  unsigned long header_addr;
55  unsigned long load_addr;
56  unsigned long load_end_addr;
57  unsigned long bss_end_addr;
58  unsigned long entry_addr;
59} multiboot_header_t;
60
61/* The symbol table for a.out.  */
62typedef struct aout_symbol_table
63{
64  unsigned long tabsize;
65  unsigned long strsize;
66  unsigned long addr;
67  unsigned long reserved;
68} aout_symbol_table_t;
69
70/* The section header table for ELF.  */
71typedef struct elf_section_header_table
72{
73  unsigned long num;
74  unsigned long size;
75  unsigned long addr;
76  unsigned long shndx;
77} elf_section_header_table_t;
78
79/* The Multiboot information.  */
80typedef struct multiboot_info
81{
82  unsigned long flags;
83  unsigned long mem_lower;
84  unsigned long mem_upper;
85  unsigned long boot_device;
86  unsigned long cmdline;
87  unsigned long mods_count;
88  unsigned long mods_addr;
89  union
90  {
91    aout_symbol_table_t aout_sym;
92    elf_section_header_table_t elf_sec;
93  } u;
94  unsigned long mmap_length;
95  unsigned long mmap_addr;
96} multiboot_info_t;
97
98/* The module structure.  */
99typedef struct module
100{
101  unsigned long mod_start;
102  unsigned long mod_end;
103  unsigned long string;
104  unsigned long reserved;
105} module_t;
106
107/* The memory map. Be careful that the offset 0 is base_addr_low
108   but no size.  */
109typedef struct memory_map
110{
111  unsigned long size;
112  unsigned long base_addr_low;
113  unsigned long base_addr_high;
114  unsigned long length_low;
115  unsigned long length_high;
116  unsigned long type;
117} memory_map_t;
118
119#endif /* ! ASM */
120