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 while (1) 80 ; 81 #endif /* CONFIG_FTWDT010_WATCHDOG */ 82 83 /*NOTREACHED*/ 84 } 85