include/multiboot.h

   1 /* multiboot.h - multiboot header file. */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2003,2007,2009  Free Software Foundation, Inc.
   5  *
   6  *  GRUB is free software: you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation, either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  GRUB is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #ifndef MULTIBOOT_HEADER
  21 #define MULTIBOOT_HEADER 1
  22
  23 /* How many bytes from the start of the file we search for the header.  */
  24 #define MULTIBOOT_SEARCH                 8192
  25
  26 /* The magic field should contain this.  */
  27 #define MULTIBOOT_MAGIC                  0x1BADB002
  28
  29 /* This should be in %eax.  */
  30 #define MULTIBOOT_MAGIC2                 0x2BADB002
  31
  32 /* The bits in the required part of flags field we don't support.  */
  33 #define MULTIBOOT_UNSUPPORTED            0x0000fffc
  34
  35 /* Alignment of multiboot modules.  */
  36 #define MULTIBOOT_MOD_ALIGN              0x00001000
  37
  38 /* Alignment of the multiboot info structure.  */
  39 #define MULTIBOOT_INFO_ALIGN             0x00000004
  40
  41 /*
  42  * Flags set in the 'flags' member of the multiboot header.
  43  */
  44
  45 /* Align all boot modules on i386 page (4KB) boundaries.  */
  46 #define MULTIBOOT_PAGE_ALIGN            0x00000001
  47
  48 /* Must pass memory information to OS.  */
  49 #define MULTIBOOT_MEMORY_INFO           0x00000002
  50
  51 /* Must pass video information to OS.  */
  52 #define MULTIBOOT_VIDEO_MODE            0x00000004
  53
  54 /* This flag indicates the use of the address fields in the header.  */
  55 #define MULTIBOOT_AOUT_KLUDGE           0x00010000
  56
  57 /*
  58  *  Flags to be set in the 'flags' member of the multiboot info structure.
  59  */
  60
  61 /* is there basic lower/upper memory information? */
  62 #define MULTIBOOT_INFO_MEMORY           0x00000001
  63 /* is there a boot device set? */
  64 #define MULTIBOOT_INFO_BOOTDEV          0x00000002
  65 /* is the command-line defined? */
  66 #define MULTIBOOT_INFO_CMDLINE          0x00000004
  67 /* are there modules to do something with? */
  68 #define MULTIBOOT_INFO_MODS             0x00000008
  69
  70 /* These next two are mutually exclusive */
  71
  72 /* is there a symbol table loaded? */
  73 #define MULTIBOOT_INFO_AOUT_SYMS                0x00000010
  74 /* is there an ELF section header table? */
  75 #define MULTIBOOT_INFO_ELF_SHDR         0x00000020
  76
  77 /* is there a full memory map? */
  78 #define MULTIBOOT_INFO_MEM_MAP          0x00000040
  79
  80 /* Is there drive info?  */
  81 #define MULTIBOOT_INFO_DRIVE_INFO               0x00000080
  82
  83 /* Is there a config table?  */
  84 #define MULTIBOOT_INFO_CONFIG_TABLE     0x00000100
  85
  86 /* Is there a boot loader name?  */
  87 #define MULTIBOOT_INFO_BOOT_LOADER_NAME 0x00000200
  88
  89 /* Is there a APM table?  */
  90 #define MULTIBOOT_INFO_APM_TABLE                0x00000400
  91
  92 /* Is there video information?  */
  93 #define MULTIBOOT_INFO_VIDEO_INFO               0x00000800
  94
  95 #endif /* ! MULTIBOOT_HEADER */