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/*
* plex86: run multiple x86 operating systems concurrently
* Copyright (C) 1999-2000 The plex86 developers team
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef MULTIBOOT_H
#define MULTIBOOT_H
/* Magic value identifying the multiboot_header */
#define MULTIBOOT_MAGIC 0x1badb002
/* Align all boot modules on page (4KB) boundaries. */
#define MULTIBOOT_PAGE_ALIGN 0x00000001
/* magic value for eax */
#define MULTIBOOT_VALID 0x2badb002
#define MULTIBOOT_AOUT_KLUDGE 0x00010000
#define MULTIBOOT_MEMORY (1L<<0)
struct multiboot_header
{
/* Must be MULTIBOOT_MAGIC */
Bit32u magic;
/* Feature flags - see below. */
Bit32u flags;
/* Checksum: magic + flags + checksum == 0 */
Bit32u checksum;
/* These are only valid if MULTIBOOT_AOUT_KLUDGE is set. */
Bit32u header_addr;
Bit32u load_addr;
Bit32u load_end_addr;
Bit32u bss_end_addr;
Bit32u entry;
};
struct multiboot_info
{
/* These flags indicate which parts of the multiboot_info are valid;
see below for the actual flag bit definitions. */
Bit32u flags;
/* Lower/Upper memory installed in the machine.
Valid only if MULTIBOOT_MEMORY is set in flags word above. */
Bit32u mem_lower;
Bit32u mem_upper;
/* BIOS disk device the kernel was loaded from.
Valid only if MULTIBOOT_BOOT_DEVICE is set in flags word above. */
Bit8u boot_device[4];
/* Command-line for the OS kernel: a null-terminated ASCII string.
Valid only if MULTIBOOT_CMDLINE is set in flags word above. */
Bit32u cmdline;
/* List of boot modules loaded with the kernel.
Valid only if MULTIBOOT_MODS is set in flags word above. */
Bit32u mods_count;
Bit32u mods_addr;
/* Symbol information for a.out or ELF executables. */
union
{
struct
{
/* a.out symbol information valid only if MULTIBOOT_AOUT_SYMS
is set in flags word above. */
Bit32u tabsize;
Bit32u strsize;
Bit32u addr;
unsigned reserved;
} a;
struct
{
/* ELF section header information valid only if
MULTIBOOT_ELF_SHDR is set in flags word above. */
unsigned num;
Bit32u size;
Bit32u addr;
Bit32u shndx;
} e;
} syms;
/* Memory map buffer.
Valid only if MULTIBOOT_MEM_MAP is set in flags word above. */
Bit32u mmap_count;
Bit32u mmap_addr;
};
#endif
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