2 * Copyright © 2013 Keith Packard <keithp@keithp.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) 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 along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
23 ao_boot_chain(uint32_t *base)
30 if (0x08000100 <= pc && pc <= 0x08200000 && (pc & 1) == 1) {
31 asm ("mov sp, %0" : : "r" (sp));
32 asm ("mov lr, %0" : : "r" (pc));
37 #define AO_BOOT_SIGNAL 0x5a5aa5a5
38 #define AO_BOOT_CHECK 0xc3c33c3c
46 struct ao_boot ao_boot __attribute__((section(".preserve.2")));
49 ao_boot_check_chain(void)
51 if (ao_boot.signal == AO_BOOT_SIGNAL && ao_boot.check == AO_BOOT_CHECK) {
54 if (ao_boot.base == AO_BOOT_FORCE_LOADER)
56 ao_boot_chain(ao_boot.base);
62 ao_boot_reboot(uint32_t *base)
65 ao_boot.signal = AO_BOOT_SIGNAL;
66 ao_boot.check = AO_BOOT_CHECK;