arch/x86/multiboot.h

   1 /* multiboot.h
   2  * tag: header for multiboot
   3  *
   4  * Copyright (C) 2003 Stefan Reinauer
   5  *
   6  * See the file "COPYING" for further information about
   7  * the copyright and warranty status of this work.
   8  */
   9
  10 /* magic number for multiboot header */
  11 #define MULTIBOOT_HEADER_MAGIC          0x1BADB002
  12
  13 /* flags for multiboot header */
  14 #define MULTIBOOT_HEADER_FLAGS          0x00010003
  15
  16 /* magic number passed by multiboot-compliant boot loader.  */
  17 #define MULTIBOOT_BOOTLOADER_MAGIC      0x2BADB002
  18
  19 /* The size of our stack (8KB).  */
  20 #define STACK_SIZE                      0x2000
  21
  22 /* C symbol format. HAVE_ASM_USCORE is defined by configure.  */
  23 #ifdef HAVE_ASM_USCORE
  24 # define EXT_C(sym)                     _ ## sym
  25 #else
  26 # define EXT_C(sym)                     sym
  27 #endif
  28
  29 #ifndef ASM
  30 /* We don't want these declarations in boot.S  */
  31
  32 /* multiboot header */
  33 typedef struct multiboot_header {
  34         unsigned long magic;
  35         unsigned long flags;
  36         unsigned long checksum;
  37         unsigned long header_addr;
  38         unsigned long load_addr;
  39         unsigned long load_end_addr;
  40         unsigned long bss_end_addr;
  41         unsigned long entry_addr;
  42 } multiboot_header_t;
  43
  44 /* symbol table for a.out */
  45 typedef struct aout_symbol_table {
  46         unsigned long tabsize;
  47         unsigned long strsize;
  48         unsigned long addr;
  49         unsigned long reserved;
  50 } aout_symbol_table_t;
  51
  52 /* section header table for ELF */
  53 typedef struct elf_section_header_table {
  54         unsigned long num;
  55         unsigned long size;
  56         unsigned long addr;
  57         unsigned long shndx;
  58 } elf_section_header_table_t;
  59
  60 /* multiboot information */
  61 typedef struct multiboot_info {
  62         unsigned long flags;
  63         unsigned long mem_lower;
  64         unsigned long mem_upper;
  65         unsigned long boot_device;
  66         unsigned long cmdline;
  67         unsigned long mods_count;
  68         unsigned long mods_addr;
  69         union {
  70                 aout_symbol_table_t aout_sym;
  71                 elf_section_header_table_t elf_sec;
  72         } u;
  73         unsigned long mmap_length;
  74         unsigned long mmap_addr;
  75 } multiboot_info_t;
  76
  77 /* module structure */
  78 typedef struct module {
  79         unsigned long mod_start;
  80         unsigned long mod_end;
  81         unsigned long string;
  82         unsigned long reserved;
  83 } module_t;
  84
  85 /* memory map. Be careful that the offset 0 is base_addr_low
  86    but no size.  */
  87 typedef struct memory_map {
  88         unsigned long size;
  89         unsigned long base_addr_low;
  90         unsigned long base_addr_high;
  91         unsigned long length_low;
  92         unsigned long length_high;
  93         unsigned long type;
  94 } memory_map_t;
  95
  96 #endif                          /* ! ASM */