2 * Copyright (C) 2010 Michael Brown <mbrown@fensystems.co.uk>.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19 * You can also choose to distribute this program under the terms of
20 * the Unmodified Binary Distribution Licence (as given in the file
21 * COPYING.UBDL), provided that you have satisfied its requirements.
24 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
28 * Standard PC-BIOS reboot mechanism
32 #include <ipxe/reboot.h>
39 * @v warm Perform a warm reboot
41 static void bios_reboot ( int warm ) {
44 /* Configure BIOS for cold/warm reboot */
45 flag = ( warm ? BDA_REBOOT_WARM : 0 );
46 put_real ( flag, BDA_SEG, BDA_REBOOT );
48 /* Jump to system reset vector */
49 __asm__ __volatile__ ( REAL_CODE ( "ljmp $0xf000, $0xfff0" ) : : );
52 PROVIDE_REBOOT ( pcbios, reboot, bios_reboot );