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/*
* Copyright (c) 1995,1997-1998 University of Utah and the Flux Group.
*
* This file is part of the OSKit Linux Boot Loader, which is free software,
* also known as "open source;" you can redistribute it and/or modify it under
* the terms of the GNU General Public License (GPL), version 2, as published
* by the Free Software Foundation (FSF).
*
* The OSKit 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 GPL for more details. You should have
* received a copy of the GPL along with the OSKit; see the file COPYING. If
* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
*/
#include <linux/config.h>
#include <oskit/x86/asm.h>
#define SETUPSECS 4 /* nr of setup-sectors */
#define SYSSIZE DEF_SYSSIZE
/* ROOT_DEV & SWAP_DEV are now written by "build". */
#define ROOT_DEV 0
#define SWAP_DEV 0
#ifndef SVGA_MODE
#define SVGA_MODE ASK_VGA
#endif
#ifndef RAMDISK
#define RAMDISK 0
#endif
#ifndef CONFIG_ROOT_RDONLY
#define CONFIG_ROOT_RDONLY 0
#endif
#define INITSEG 0x07c0 /* initial boot segment */
.text
.code16
.globl EXT(_start)
LEXT(_start)
/* set up es, so we can get at our string */
mov $INITSEG,%ax
mov %ax,%es
/* turn off the floppy, which will otherwise continue spinning */
mov $0x3f2, %dx
xor %al, %al
outb %al, %dx
/* read cursor pos; afterwards dh = row, dl = column */
xor %bh, %bh /* page 0 */
mov $3, %ah
int $0x10
/* print a (semi-)informative message */
mov $emsg, %cx /* length of the string goes in cx */
sub $msg, %cx
mov $7, %bx /* page 0, attribute 7 (normal) */
mov $msg, %bp
mov $0x1301, %ax /* write string, move cursor */
int $0x10
/* just sit twiddling our thumbs until the user reboots */
hlt
msg:
.ascii "\n\rSorry, linuxboot kernels cannot be booted directly!\n\rYou need to use a bootloader like lilo instead.\n\r"
emsg:
.org 497
setup_sects:
.byte SETUPSECS
root_flags:
.word CONFIG_ROOT_RDONLY
syssize:
.word SYSSIZE
swap_dev:
.word SWAP_DEV
ram_size:
.word RAMDISK
vid_mode:
.word SVGA_MODE
root_dev:
.word ROOT_DEV
boot_flag:
.word 0xAA55
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