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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1996 Erich Boleyn <erich@uruk.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* MultiBoot Header description
*
*
* struct multiboot_header
* {
* Must be MULTIBOOT_MAGIC - see below.
* unsigned magic;
*
* Feature flags - see below.
* unsigned flags;
*
*
* Checksum
*
* The above fields plus this one must equal 0 mod 2^32.
*
* unsigned checksum;
*
* These are only valid if MULTIBOOT_AOUT_KLUDGE is set.
* unsigned header_addr;
* unsigned load_addr;
* unsigned load_end_addr;
* unsigned bss_end_addr;
* unsigned entry_addr;
* };
*/
/*
* The entire multiboot_header must be contained
* within the first MULTIBOOT_SEARCH bytes of the kernel image.
* #define MULTIBOOT_SEARCH 8192
* #define MULTIBOOT_FOUND(addr, len) \
* (!((addr) & 0x3) && ((len) >= 12) && (*((int *)(addr)) == MULTIBOOT_MAGIC) \
* && !(*((unsigned *)(addr)) + *((unsigned *)(addr+4)) \
* + *((unsigned *)(addr+8))) \
* && (!(MULTIBOOT_AOUT_KLUDGE & *((int *)(addr+4))) || ((len) >= 32)))
*/
/* Magic value identifying the multiboot_header. */
#define MULTIBOOT_MAGIC 0x1BADB002
/*
* Features flags for 'flags'.
* If a boot loader sees a flag in MULTIBOOT_MUSTKNOW set
* and it doesn't understand it, it must fail.
*/
#define MULTIBOOT_MUSTKNOW 0x0000FFFF
/* currently unsupported flags... this is a kind of version number. */
#define MULTIBOOT_UNSUPPORTED 0x0000FFFC
/* Align all boot modules on i386 page (4KB) boundaries. */
#define MULTIBOOT_PAGE_ALIGN 0x00000001
/* Must pass memory information to OS. */
#define MULTIBOOT_MEMORY_INFO 0x00000002
/* This flag indicates the use of the other fields in the header. */
#define MULTIBOOT_AOUT_KLUDGE 0x00010000