| Macpaul Lin | 6471556 | 2011-09-23 17:03:19 +0800 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2002 |
| 3 | * Sysgo Real-Time Solutions, GmbH <www.elinos.com> |
| 4 | * Marius Groeger <mgroeger@sysgo.de> |
| 5 | * |
| 6 | * (C) Copyright 2002 |
| 7 | * Gary Jennejohn, DENX Software Engineering, <gj@denx.de> |
| 8 | * |
| 9 | * Copyright (C) 2011 Andes Technology Corporation |
| 10 | * Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com> |
| 11 | * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com> |
| 12 | * |
| 13 | * See file CREDITS for list of people who contributed to this |
| 14 | * project. |
| 15 | * |
| 16 | * This program is free software; you can redistribute it and/or |
| 17 | * modify it under the terms of the GNU General Public License as |
| 18 | * published by the Free Software Foundation; either version 2 of |
| 19 | * the License, or (at your option) any later version. |
| 20 | * |
| 21 | * This program is distributed in the hope that it will be useful, |
| 22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 24 | * GNU General Public License for more details. |
| 25 | * |
| 26 | * You should have received a copy of the GNU General Public License |
| 27 | * along with this program; if not, write to the Free Software |
| 28 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 29 | * MA 02111-1307 USA |
| 30 | */ |
| 31 | |
| 32 | /* CPU specific code */ |
| 33 | #include <common.h> |
| 34 | #include <command.h> |
| 35 | #include <watchdog.h> |
| 36 | #include <asm/cache.h> |
| 37 | |
| 38 | #include <faraday/ftwdt010_wdt.h> |
| 39 | |
| 40 | /* |
| 41 | * cleanup_before_linux() is called just before we call linux |
| 42 | * it prepares the processor for linux |
| 43 | * |
| 44 | * we disable interrupt and caches. |
| 45 | */ |
| 46 | int cleanup_before_linux(void) |
| 47 | { |
| 48 | disable_interrupts(); |
| 49 | |
| 50 | #ifdef CONFIG_MMU |
| 51 | /* turn off I/D-cache */ |
| 52 | icache_disable(); |
| 53 | dcache_disable(); |
| 54 | |
| 55 | /* flush I/D-cache */ |
| 56 | invalidate_icac(); |
| 57 | invalidate_dcac(); |
| 58 | #endif |
| 59 | |
| 60 | return 0; |
| 61 | } |
| 62 | |
| 63 | int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |
| 64 | { |
| 65 | disable_interrupts(); |
| 66 | |
| 67 | /* |
| 68 | * reset to the base addr of andesboot. |
| 69 | * currently no ROM loader at addr 0. |
| 70 | * do not use reset_cpu(0); |
| 71 | */ |
| 72 | #ifdef CONFIG_FTWDT010_WATCHDOG |
| 73 | /* |
| 74 | * workaround: if we use CONFIG_HW_WATCHDOG with ftwdt010, will lead |
| 75 | * automatic hardware reset when booting Linux. |
| 76 | * Please do not use CONFIG_HW_WATCHDOG and WATCHDOG_RESET() here. |
| 77 | */ |
| 78 | ftwdt010_wdt_reset(); |
| 79 | #endif /* CONFIG_FTWDT010_WATCHDOG */ |
| 80 | hang(); |
| 81 | |
| 82 | /*NOTREACHED*/ |
| 83 | } |