include/multiboot2.h

   1 /*  multiboot2.h - Multiboot 2 header file.  */
   2 /*  Copyright (C) 1999,2003,2007,2008,2009,2010  Free Software Foundation, Inc.
   3  *
   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:
  10  *
  11  *  The above copyright notice and this permission notice shall be included in
  12  *  all copies or substantial portions of the Software.
  13  *
  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.
  20  */
  21
  22 #ifndef MULTIBOOT_HEADER
  23 #define MULTIBOOT_HEADER 1
  24
  25 /* How many bytes from the start of the file we search for the header.  */
  26 #define MULTIBOOT_SEARCH                        8192
  27
  28 /* The magic field should contain this.  */
  29 #define MULTIBOOT2_HEADER_MAGIC                 0xe85250d6
  30
  31 /* This should be in %eax.  */
  32 #define MULTIBOOT2_BOOTLOADER_MAGIC             0x36d76289
  33
  34 /* Alignment of multiboot modules.  */
  35 #define MULTIBOOT_MOD_ALIGN                     0x00001000
  36
  37 /* Alignment of the multiboot info structure.  */
  38 #define MULTIBOOT_INFO_ALIGN                    0x00000004
  39
  40 /* Flags set in the 'flags' member of the multiboot header.  */
  41
  42 /* Align all boot modules on i386 page (4KB) boundaries.  */
  43 #define MULTIBOOT_PAGE_ALIGN                    0x00000001
  44
  45 /* Must pass memory information to OS.  */
  46 #define MULTIBOOT_MEMORY_INFO                   0x00000002
  47
  48 /* Must pass video information to OS.  */
  49 #define MULTIBOOT_VIDEO_MODE                    0x00000004
  50
  51 /* This flag indicates the use of the address fields in the header.  */
  52 #define MULTIBOOT_AOUT_KLUDGE                   0x00010000
  53
  54 /* Flags to be set in the 'flags' member of the multiboot info structure.  */
  55
  56 /* is there basic lower/upper memory information? */
  57 #define MULTIBOOT_INFO_MEMORY                   0x00000001
  58 /* is there a boot device set? */
  59 #define MULTIBOOT_INFO_BOOTDEV                  0x00000002
  60 /* is the command-line defined? */
  61 #define MULTIBOOT_INFO_CMDLINE                  0x00000004
  62 /* are there modules to do something with? */
  63 #define MULTIBOOT_INFO_MODS                     0x00000008
  64
  65 /* These next two are mutually exclusive */
  66
  67 /* is there a symbol table loaded? */
  68 #define MULTIBOOT_INFO_AOUT_SYMS                0x00000010
  69 /* is there an ELF section header table? */
  70 #define MULTIBOOT_INFO_ELF_SHDR                 0X00000020
  71
  72 /* is there a full memory map? */
  73 #define MULTIBOOT_INFO_MEM_MAP                  0x00000040
  74
  75 /* Is there drive info?  */
  76 #define MULTIBOOT_INFO_DRIVE_INFO               0x00000080
  77
  78 /* Is there a config table?  */
  79 #define MULTIBOOT_INFO_CONFIG_TABLE             0x00000100
  80
  81 /* Is there a boot loader name?  */
  82 #define MULTIBOOT_INFO_BOOT_LOADER_NAME         0x00000200
  83
  84 /* Is there a APM table?  */
  85 #define MULTIBOOT_INFO_APM_TABLE                0x00000400
  86
  87 /* Is there video information?  */
  88 #define MULTIBOOT_INFO_VIDEO_INFO               0x00000800
  89
  90 #ifndef ASM_FILE
  91
  92 typedef unsigned short          multiboot_uint16_t;
  93 typedef unsigned int            multiboot_uint32_t;
  94 typedef unsigned long long      multiboot_uint64_t;
  95
  96 struct multiboot_header
  97 {
  98   /* Must be MULTIBOOT_MAGIC - see above.  */
  99   multiboot_uint32_t magic;
 100
 101   /* Feature flags.  */
 102   multiboot_uint32_t flags;
 103
 104   /* The above fields plus this one must equal 0 mod 2^32. */
 105   multiboot_uint32_t checksum;
 106
 107   /* These are only valid if MULTIBOOT_AOUT_KLUDGE is set.  */
 108   multiboot_uint32_t header_addr;
 109   multiboot_uint32_t load_addr;
 110   multiboot_uint32_t load_end_addr;
 111   multiboot_uint32_t bss_end_addr;
 112   multiboot_uint32_t entry_addr;
 113
 114   /* These are only valid if MULTIBOOT_VIDEO_MODE is set.  */
 115   multiboot_uint32_t mode_type;
 116   multiboot_uint32_t width;
 117   multiboot_uint32_t height;
 118   multiboot_uint32_t depth;
 119 };
 120
 121 /* The symbol table for a.out.  */
 122 struct multiboot_aout_symbol_table
 123 {
 124   multiboot_uint32_t tabsize;
 125   multiboot_uint32_t strsize;
 126   multiboot_uint32_t addr;
 127   multiboot_uint32_t reserved;
 128 };
 129 typedef struct multiboot_aout_symbol_table multiboot_aout_symbol_table_t;
 130
 131 /* The section header table for ELF.  */
 132 struct multiboot_elf_section_header_table
 133 {
 134   multiboot_uint32_t num;
 135   multiboot_uint32_t size;
 136   multiboot_uint32_t addr;
 137   multiboot_uint32_t shndx;
 138 };
 139 typedef struct multiboot_elf_section_header_table multiboot_elf_section_header_table_t;
 140
 141 struct multiboot_info
 142 {
 143   /* Multiboot info version number */
 144   multiboot_uint32_t flags;
 145
 146   /* Available memory from BIOS */
 147   multiboot_uint32_t mem_lower;
 148   multiboot_uint32_t mem_upper;
 149
 150   /* "root" partition */
 151   multiboot_uint32_t boot_device;
 152
 153   /* Kernel command line */
 154   multiboot_uint32_t cmdline;
 155
 156   /* Boot-Module list */
 157   multiboot_uint32_t mods_count;
 158   multiboot_uint32_t mods_addr;
 159
 160   union
 161   {
 162     multiboot_aout_symbol_table_t aout_sym;
 163     multiboot_elf_section_header_table_t elf_sec;
 164   } u;
 165
 166   /* Memory Mapping buffer */
 167   multiboot_uint32_t mmap_length;
 168   multiboot_uint32_t mmap_addr;
 169
 170   /* Drive Info buffer */
 171   multiboot_uint32_t drives_length;
 172   multiboot_uint32_t drives_addr;
 173
 174   /* ROM configuration table */
 175   multiboot_uint32_t config_table;
 176
 177   /* Boot Loader Name */
 178   multiboot_uint32_t boot_loader_name;
 179
 180   /* APM table */
 181   multiboot_uint32_t apm_table;
 182
 183   /* Video */
 184   multiboot_uint32_t vbe_control_info;
 185   multiboot_uint32_t vbe_mode_info;
 186   multiboot_uint16_t vbe_mode;
 187   multiboot_uint16_t vbe_interface_seg;
 188   multiboot_uint16_t vbe_interface_off;
 189   multiboot_uint16_t vbe_interface_len;
 190 };
 191 typedef struct multiboot_info multiboot_info_t;
 192
 193 struct multiboot_mmap_entry
 194 {
 195   multiboot_uint32_t size;
 196   multiboot_uint64_t addr;
 197   multiboot_uint64_t len;
 198 #define MULTIBOOT_MEMORY_AVAILABLE              1
 199 #define MULTIBOOT_MEMORY_RESERVED               2
 200   multiboot_uint32_t type;
 201 } __attribute__((packed));
 202 typedef struct multiboot_mmap_entry multiboot_memory_map_t;
 203
 204 struct multiboot_mod_list
 205 {
 206   /* the memory used goes from bytes 'mod_start' to 'mod_end-1' inclusive */
 207   multiboot_uint32_t mod_start;
 208   multiboot_uint32_t mod_end;
 209
 210   /* Module command line */
 211   multiboot_uint32_t cmdline;
 212
 213   /* padding to take it to 16 bytes (must be zero) */
 214   multiboot_uint32_t pad;
 215 };
 216 typedef struct multiboot_mod_list multiboot_module_t;
 217
 218 #endif /* ! ASM_FILE */
 219
 220 #endif /* ! MULTIBOOT_HEADER */