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. */ 49 typedef 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. */ 62 typedef 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. */ 71 typedef 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. */ 80 typedef 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. */ 99 typedef 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. */ 109 typedef 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