diff options
Diffstat (limited to 'arch/nds32/cpu/n1213/ag101/cpu.c')
| -rw-r--r-- | arch/nds32/cpu/n1213/ag101/cpu.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/arch/nds32/cpu/n1213/ag101/cpu.c b/arch/nds32/cpu/n1213/ag101/cpu.c new file mode 100644 index 0000000..a9991e7 --- /dev/null +++ b/arch/nds32/cpu/n1213/ag101/cpu.c @@ -0,0 +1,84 @@ +/* + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Marius Groeger <mgroeger@sysgo.de> + * + * (C) Copyright 2002 + * Gary Jennejohn, DENX Software Engineering, <gj@denx.de> + * + * Copyright (C) 2011 Andes Technology Corporation + * Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com> + * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * 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., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +/* CPU specific code */ +#include <common.h> +#include <command.h> +#include <watchdog.h> +#include <asm/cache.h> + +#include <faraday/ftwdt010_wdt.h> + +/* + * cleanup_before_linux() is called just before we call linux + * it prepares the processor for linux + * + * we disable interrupt and caches. + */ +int cleanup_before_linux(void) +{ + disable_interrupts(); + +#ifdef CONFIG_MMU + /* turn off I/D-cache */ + icache_disable(); + dcache_disable(); + + /* flush I/D-cache */ + invalidate_icac(); + invalidate_dcac(); +#endif + + return 0; +} + +int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + disable_interrupts(); + + /* + * reset to the base addr of andesboot. + * currently no ROM loader at addr 0. + * do not use reset_cpu(0); + */ +#ifdef CONFIG_FTWDT010_WATCHDOG + /* + * workaround: if we use CONFIG_HW_WATCHDOG with ftwdt010, will lead + * automatic hardware reset when booting Linux. + * Please do not use CONFIG_HW_WATCHDOG and WATCHDOG_RESET() here. + */ + ftwdt010_wdt_reset(); + while (1) + ; +#endif /* CONFIG_FTWDT010_WATCHDOG */ + + /*NOTREACHED*/ +} |
