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 * SPDX-License-Identifier: GPL-2.0+ 14 */ 15 16 /* CPU specific code */ 17 #include <common.h> 18 #include <command.h> 19 #include <watchdog.h> 20 #include <asm/cache.h> 21 22 #include <faraday/ftwdt010_wdt.h> 23 24 /* 25 * cleanup_before_linux() is called just before we call linux 26 * it prepares the processor for linux 27 * 28 * we disable interrupt and caches. 29 */ 30 int cleanup_before_linux(void) 31 { 32 disable_interrupts(); 33 34 #ifdef CONFIG_MMU 35 /* turn off I/D-cache */ 36 icache_disable(); 37 dcache_disable(); 38 39 /* flush I/D-cache */ 40 invalidate_icac(); 41 invalidate_dcac(); 42 #endif 43 44 return 0; 45 } 46 47 int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 48 { 49 disable_interrupts(); 50 51 /* 52 * reset to the base addr of andesboot. 53 * currently no ROM loader at addr 0. 54 * do not use reset_cpu(0); 55 */ 56 #ifdef CONFIG_FTWDT010_WATCHDOG 57 /* 58 * workaround: if we use CONFIG_HW_WATCHDOG with ftwdt010, will lead 59 * automatic hardware reset when booting Linux. 60 * Please do not use CONFIG_HW_WATCHDOG and WATCHDOG_RESET() here. 61 */ 62 ftwdt010_wdt_reset(); 63 while (1) 64 ; 65 #endif /* CONFIG_FTWDT010_WATCHDOG */ 66 67 /*NOTREACHED*/ 68 } 69