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/* Project: OSLib
* Description: The OS Construction Kit
* Date: 1.6.2000
* Idea by: Luca Abeni & Gerardo Lamastra
*
* OSLib is an SO project aimed at developing a common, easy-to-use
* low-level infrastructure for developing OS kernels and Embedded
* Applications; it partially derives from the HARTIK project but it
* currently is independently developed.
*
* OSLib is distributed under GPL License, and some of its code has
* been derived from the Linux kernel source; also some important
* ideas come from studying the DJGPP go32 extender.
*
* We acknowledge the Linux Community, Free Software Foundation,
* D.J. Delorie and all the other developers who believe in the
* freedom of software and ideas.
*
* For legalese, check out the included GPL license.
*/
/*
* 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.
*/
#ifndef __LL_I386_MB_INFO_H__
#define __LL_I386_MB_INFO_H__
#include <ll/i386/defs.h>
BEGIN_DEF
/*
* The structure type "mod_list" is used by the "multiboot_info" structure.
*/
struct mod_list
{
/* the memory used goes from bytes 'mod_start' to 'mod_end-1' inclusive */
unsigned long mod_start;
unsigned long mod_end;
/* Module command line */
unsigned long cmdline;
/* padding to take it to 16 bytes (must be zero) */
unsigned long pad;
};
/*
* INT-15, AX=E820 style "AddressRangeDescriptor"
* ...with a "size" parameter on the front which is the structure size - 4,
* pointing to the next one, up until the full buffer length of the memory
* map has been reached.
*/
struct AddrRangeDesc
{
unsigned long size;
unsigned long BaseAddrLow;
unsigned long BaseAddrHigh;
unsigned long LengthLow;
unsigned long LengthHigh;
unsigned long Type;
/* unspecified optional padding... */
};
/* usable memory "Type", all others are reserved. */
#define MB_ARD_MEMORY 1
/*
* MultiBoot Info description
*
* This is the struct passed to the boot image. This is done by placing
* its address in the EAX register.
*/
struct multiboot_info
{
/* MultiBoot info version number */
unsigned long flags;
/* Available memory from BIOS */
unsigned long mem_lower;
unsigned long mem_upper;
/* "root" partition */
unsigned long boot_device;
/* Kernel command line */
unsigned long cmdline;
/* Boot-Module list */
unsigned long mods_count;
unsigned long mods_addr;
union
{
struct
{
/* (a.out) Kernel symbol table info */
unsigned long tabsize;
unsigned long strsize;
unsigned long addr;
unsigned long pad;
} a;
struct
{
/* (ELF) Kernel section header table */
unsigned long num;
unsigned long size;
unsigned long addr;
unsigned long shndx;
} e;
} syms;
/* Memory Mapping buffer */
unsigned long mmap_length;
unsigned long mmap_addr;
#ifndef __OLD_MB__
/*
Gerardo: I need to add also the phisical address base for
both low ( < 1MB) & upper ( > 1MB) memory, as X starts from DOS
which could have preallocated some of this memory...
For example, GRUB assumes that mem_lowbase = 0x0 &
mem_upbase = 0x100000
*/
unsigned long mem_lowbase;
unsigned long mem_upbase;
#endif /* __OLD_MB__ */
};
/*
* Flags to be set in the 'flags' parameter above
*/
/* is there basic lower/upper memory information? */
#define MB_INFO_MEMORY 0x1
/* is there a boot device set? */
#define MB_INFO_BOOTDEV 0x2
/* is the command-line defined? */
#define MB_INFO_CMDLINE 0x4
/* are there modules to do something with? */
#define MB_INFO_MODS 0x8
/* These next two are mutually exclusive */
/* is there a symbol table loaded? */
#define MB_INFO_AOUT_SYMS 0x10
/* is there an ELF section header table? */
#define MB_INFO_ELF_SHDR 0x20
/* is there a full memory map? */
#define MB_INFO_MEM_MAP 0x40
/* Gerardo: Added this!
--------------------
The idea is that the BootLoader provides an interface
to return back to it; this is useful to implement a DOS
boot-loader, in order to use DOS as development environment.
*/
#define MB_INFO_USEGDT 0x80
/*
* The following value must be present in the EAX register.
*/
#define MULTIBOOT_VALID 0x2BADB002
struct multiboot_info * mbi_address(void);
END_DEF
#endif