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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;

  /* Drive Info buffer */

  unsigned long drives_length;

  unsigned long drives_addr;

  /* ROM configuration table */

  unsigned long config_table;

  /* Boot Loader Name */

  unsigned long boot_loader_name;

  /* APM table */

  unsigned long apm_table;

  /* Video */

  unsigned long vbe_control_info;

  unsigned long vbe_mode_info;

  unsigned short vbe_mode;

  unsigned short vbe_interface_seg;

  unsigned short vbe_interface_off;

  unsigned short vbe_interface_len;

#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

/* Is there drive info?  */

#define MB_INFO_DRIVE_INFO              0x00000080

/* Is there a config table?  */

#define MB_INFO_CONFIG_TABLE            0x00000100

/* Is there a boot loader name?  */

#define MB_INFO_BOOT_LOADER_NAME        0x00000200

/* Is there a APM table?  */

#define MB_INFO_APM_TABLE               0x00000400

/* Is there video information?  */

#define MB_INFO_VIDEO_INFO              0x00000800

#if 0

/* 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

#endif

/*

 *  The following value must be present in the EAX register.

 */

#define MULTIBOOT_VALID         0x2BADB002

struct multiboot_info * mbi_address(void);

END_DEF

#endif