[people/ms/u-boot.git] / arch / nds32 / cpu / n1213 / ag101 / cpu.c

/*
 * (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>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

/* 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();

	/* turn off I/D-cache */
	cache_flush();
	icache_disable();
	dcache_disable();
	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*/
}
Commit	Line	Data
445a886d ML	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	*
1a459660	13	* SPDX-License-Identifier: GPL-2.0+
445a886d ML	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	{
445a886d ML	32	disable_interrupts();
445a886d ML	33
445a886d	34	/* turn off I/D-cache */
b841b6e9	35	cache_flush();
445a886d ML	36	icache_disable();
445a886d ML	37	dcache_disable();
445a886d ML	38	return 0;
	39	}
	40
	41	int do_reset(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
	42	{
	43	disable_interrupts();
	44
	45	/*
	46	* reset to the base addr of andesboot.
	47	* currently no ROM loader at addr 0.
	48	* do not use reset_cpu(0);
	49	*/
	50	#ifdef CONFIG_FTWDT010_WATCHDOG
	51	/*
	52	* workaround: if we use CONFIG_HW_WATCHDOG with ftwdt010, will lead
	53	* automatic hardware reset when booting Linux.
	54	* Please do not use CONFIG_HW_WATCHDOG and WATCHDOG_RESET() here.
	55	*/
	56	ftwdt010_wdt_reset();
	57	while (1)
	58	;
	59	#endif /* CONFIG_FTWDT010_WATCHDOG */
	60
	61	/NOTREACHED/
	62	}