1 #ifndef _MULTIBOOT_H 2 #define _MULTIBOOT_H 3 4 /** 5 * @file 6 * 7 * Multiboot operating systems 8 * 9 */ 10 11 FILE_LICENCE ( GPL2_OR_LATER ); 12 13 #include <stdint.h> 14 15 /** The magic number for the Multiboot header */ 16 #define MULTIBOOT_HEADER_MAGIC 0x1BADB002 17 18 /** Boot modules must be page aligned */ 19 #define MB_FLAG_PGALIGN 0x00000001 20 21 /** Memory map must be provided */ 22 #define MB_FLAG_MEMMAP 0x00000002 23 24 /** Video mode information must be provided */ 25 #define MB_FLAG_VIDMODE 0x00000004 26 27 /** Image is a raw multiboot image (not ELF) */ 28 #define MB_FLAG_RAW 0x00010000 29 30 /** 31 * The magic number passed by a Multiboot-compliant boot loader 32 * 33 * Must be passed in register %eax when jumping to the Multiboot OS 34 * image. 35 */ 36 #define MULTIBOOT_BOOTLOADER_MAGIC 0x2BADB002 37 38 /** Multiboot information structure mem_* fields are valid */ 39 #define MBI_FLAG_MEM 0x00000001 40 41 /** Multiboot information structure boot_device field is valid */ 42 #define MBI_FLAG_BOOTDEV 0x00000002 43 44 /** Multiboot information structure cmdline field is valid */ 45 #define MBI_FLAG_CMDLINE 0x00000004 46 47 /** Multiboot information structure module fields are valid */ 48 #define MBI_FLAG_MODS 0x00000008 49 50 /** Multiboot information structure a.out symbol table is valid */ 51 #define MBI_FLAG_AOUT 0x00000010 52 53 /** Multiboot information struture ELF section header table is valid */ 54 #define MBI_FLAG_ELF 0x00000020 55 56 /** Multiboot information structure memory map is valid */ 57 #define MBI_FLAG_MMAP 0x00000040 58 59 /** Multiboot information structure drive list is valid */ 60 #define MBI_FLAG_DRIVES 0x00000080 61 62 /** Multiboot information structure ROM configuration field is valid */ 63 #define MBI_FLAG_CFGTBL 0x00000100 64 65 /** Multiboot information structure boot loader name field is valid */ 66 #define MBI_FLAG_LOADER 0x00000200 67 68 /** Multiboot information structure APM table is valid */ 69 #define MBI_FLAG_APM 0x00000400 70 71 /** Multiboot information structure video information is valid */ 72 #define MBI_FLAG_VBE 0x00000800 73 74 /** A multiboot header */ 75 struct multiboot_header { 76 uint32_t magic; 77 uint32_t flags; 78 uint32_t checksum; 79 uint32_t header_addr; 80 uint32_t load_addr; 81 uint32_t load_end_addr; 82 uint32_t bss_end_addr; 83 uint32_t entry_addr; 84 } __attribute__ (( packed, may_alias )); 85 86 /** A multiboot a.out symbol table */ 87 struct multiboot_aout_symbol_table { 88 uint32_t tabsize; 89 uint32_t strsize; 90 uint32_t addr; 91 uint32_t reserved; 92 } __attribute__ (( packed, may_alias )); 93 94 /** A multiboot ELF section header table */ 95 struct multiboot_elf_section_header_table { 96 uint32_t num; 97 uint32_t size; 98 uint32_t addr; 99 uint32_t shndx; 100 } __attribute__ (( packed, may_alias )); 101 102 /** A multiboot information structure */ 103 struct multiboot_info { 104 uint32_t flags; 105 uint32_t mem_lower; 106 uint32_t mem_upper; 107 uint32_t boot_device; 108 uint32_t cmdline; 109 uint32_t mods_count; 110 uint32_t mods_addr; 111 union { 112 struct multiboot_aout_symbol_table aout_syms; 113 struct multiboot_elf_section_header_table elf_sections; 114 } syms; 115 uint32_t mmap_length; 116 uint32_t mmap_addr; 117 uint32_t drives_length; 118 uint32_t drives_addr; 119 uint32_t config_table; 120 uint32_t boot_loader_name; 121 uint32_t apm_table; 122 uint32_t vbe_control_info; 123 uint32_t vbe_mode_info; 124 uint16_t vbe_mode; 125 uint16_t vbe_interface_seg; 126 uint16_t vbe_interface_off; 127 uint16_t vbe_interface_len; 128 } __attribute__ (( packed, may_alias )); 129 130 /** A multiboot module structure */ 131 struct multiboot_module { 132 uint32_t mod_start; 133 uint32_t mod_end; 134 uint32_t string; 135 uint32_t reserved; 136 } __attribute__ (( packed, may_alias )); 137 138 /** A multiboot memory map entry */ 139 struct multiboot_memory_map { 140 uint32_t size; 141 uint64_t base_addr; 142 uint64_t length; 143 uint32_t type; 144 } __attribute__ (( packed, may_alias )); 145 146 /** Usable RAM */ 147 #define MBMEM_RAM 1 148 149 #endif /* _MULTIBOOT_H */ 150
