1 /* multiboot.h - Multiboot header file. */
2 /* Copyright (C) 1999,2003,2007,2008,2009 Free Software Foundation, Inc.
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to
6 * deal in the Software without restriction, including without limitation the
7 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
8 * sell copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL ANY
17 * DEVELOPER OR DISTRIBUTOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
18 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
19 * IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 #ifndef MULTIBOOT_HEADER
24 #define MULTIBOOT_HEADER 1
26 /* How many bytes from the start of the file we search for the header. */
27 #define MULTIBOOT_SEARCH 8192
29 /* The magic field should contain this. */
30 #define MULTIBOOT_HEADER_MAGIC 0x1BADB002
32 /* This should be in %eax. */
33 #define MULTIBOOT_BOOTLOADER_MAGIC 0x2BADB002
35 /* The bits in the required part of flags field we don't support. */
36 #define MULTIBOOT_UNSUPPORTED 0x0000fffc
38 /* Alignment of multiboot modules. */
39 #define MULTIBOOT_MOD_ALIGN 0x00001000
41 /* Alignment of the multiboot info structure. */
42 #define MULTIBOOT_INFO_ALIGN 0x00000004
44 /* Flags set in the 'flags' member of the multiboot header. */
46 /* Align all boot modules on i386 page (4KB) boundaries. */
47 #define MULTIBOOT_PAGE_ALIGN 0x00000001
49 /* Must pass memory information to OS. */
50 #define MULTIBOOT_MEMORY_INFO 0x00000002
52 /* Must pass video information to OS. */
53 #define MULTIBOOT_VIDEO_MODE 0x00000004
55 /* This flag indicates the use of the address fields in the header. */
56 #define MULTIBOOT_AOUT_KLUDGE 0x00010000
58 /* Flags to be set in the 'flags' member of the multiboot info structure. */
60 /* is there basic lower/upper memory information? */
61 #define MULTIBOOT_INFO_MEMORY 0x00000001
62 /* is there a boot device set? */
63 #define MULTIBOOT_INFO_BOOTDEV 0x00000002
64 /* is the command-line defined? */
65 #define MULTIBOOT_INFO_CMDLINE 0x00000004
66 /* are there modules to do something with? */
67 #define MULTIBOOT_INFO_MODS 0x00000008
69 /* These next two are mutually exclusive */
71 /* is there a symbol table loaded? */
72 #define MULTIBOOT_INFO_AOUT_SYMS 0x00000010
73 /* is there an ELF section header table? */
74 #define MULTIBOOT_INFO_ELF_SHDR 0X00000020
76 /* is there a full memory map? */
77 #define MULTIBOOT_INFO_MEM_MAP 0x00000040
79 /* Is there drive info? */
80 #define MULTIBOOT_INFO_DRIVE_INFO 0x00000080
82 /* Is there a config table? */
83 #define MULTIBOOT_INFO_CONFIG_TABLE 0x00000100
85 /* Is there a boot loader name? */
86 #define MULTIBOOT_INFO_BOOT_LOADER_NAME 0x00000200
88 /* Is there a APM table? */
89 #define MULTIBOOT_INFO_APM_TABLE 0x00000400
91 /* Is there video information? */
92 #define MULTIBOOT_INFO_VIDEO_INFO 0x00000800
96 typedef unsigned short multiboot_uint16_t;
97 typedef unsigned int multiboot_uint32_t;
98 typedef unsigned long long multiboot_uint64_t;
100 struct multiboot_header
102 /* Must be MULTIBOOT_MAGIC - see above. */
103 multiboot_uint32_t magic;
106 multiboot_uint32_t flags;
108 /* The above fields plus this one must equal 0 mod 2^32. */
109 multiboot_uint32_t checksum;
111 /* These are only valid if MULTIBOOT_AOUT_KLUDGE is set. */
112 multiboot_uint32_t header_addr;
113 multiboot_uint32_t load_addr;
114 multiboot_uint32_t load_end_addr;
115 multiboot_uint32_t bss_end_addr;
116 multiboot_uint32_t entry_addr;
118 /* These are only valid if MULTIBOOT_VIDEO_MODE is set. */
119 multiboot_uint32_t mode_type;
120 multiboot_uint32_t width;
121 multiboot_uint32_t height;
122 multiboot_uint32_t depth;
125 /* The symbol table for a.out. */
126 struct multiboot_aout_symbol_table
128 multiboot_uint32_t tabsize;
129 multiboot_uint32_t strsize;
130 multiboot_uint32_t addr;
131 multiboot_uint32_t reserved;
133 typedef struct multiboot_aout_symbol_table multiboot_aout_symbol_table_t;
135 /* The section header table for ELF. */
136 struct multiboot_elf_section_header_table
138 multiboot_uint32_t num;
139 multiboot_uint32_t size;
140 multiboot_uint32_t addr;
141 multiboot_uint32_t shndx;
143 typedef struct multiboot_elf_section_header_table multiboot_elf_section_header_table_t;
145 struct multiboot_info
147 /* Multiboot info version number */
148 multiboot_uint32_t flags;
150 /* Available memory from BIOS */
151 multiboot_uint32_t mem_lower;
152 multiboot_uint32_t mem_upper;
154 /* "root" partition */
155 multiboot_uint32_t boot_device;
157 /* Kernel command line */
158 multiboot_uint32_t cmdline;
160 /* Boot-Module list */
161 multiboot_uint32_t mods_count;
162 multiboot_uint32_t mods_addr;
166 multiboot_aout_symbol_table_t aout_sym;
167 multiboot_elf_section_header_table_t elf_sec;
170 /* Memory Mapping buffer */
171 multiboot_uint32_t mmap_length;
172 multiboot_uint32_t mmap_addr;
174 /* Drive Info buffer */
175 multiboot_uint32_t drives_length;
176 multiboot_uint32_t drives_addr;
178 /* ROM configuration table */
179 multiboot_uint32_t config_table;
181 /* Boot Loader Name */
182 multiboot_uint32_t boot_loader_name;
185 multiboot_uint32_t apm_table;
188 multiboot_uint32_t vbe_control_info;
189 multiboot_uint32_t vbe_mode_info;
190 multiboot_uint16_t vbe_mode;
191 multiboot_uint16_t vbe_interface_seg;
192 multiboot_uint16_t vbe_interface_off;
193 multiboot_uint16_t vbe_interface_len;
195 typedef struct multiboot_info multiboot_info_t;
197 struct multiboot_mmap_entry
199 multiboot_uint32_t size;
200 multiboot_uint64_t addr;
201 multiboot_uint64_t len;
202 #define MULTIBOOT_MEMORY_AVAILABLE 1
203 #define MULTIBOOT_MEMORY_RESERVED 2
204 multiboot_uint32_t type;
205 } __attribute__((packed));
206 typedef struct multiboot_mmap_entry multiboot_memory_map_t;
208 struct multiboot_mod_list
210 /* the memory used goes from bytes 'mod_start' to 'mod_end-1' inclusive */
211 multiboot_uint32_t mod_start;
212 multiboot_uint32_t mod_end;
214 /* Module command line */
215 multiboot_uint32_t cmdline;
217 /* padding to take it to 16 bytes (must be zero) */
218 multiboot_uint32_t pad;
220 typedef struct multiboot_mod_list multiboot_module_t;
222 #endif /* ! ASM_FILE */
224 #endif /* ! MULTIBOOT_HEADER */