u-boot/arch/arm/mach-davinci/reset.c

// SPDX-License-Identifier: GPL-2.0+
/*
 *  Processor reset using WDT.
 *
 * Copyright (C) 2012 Dmitry Bondar <bond@inmys.ru>
 * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
 */

#include <common.h>
#include <cpu_func.h>
#include <asm/io.h>
#include <asm/arch/timer_defs.h>
#include <asm/arch/hardware.h>

void reset_cpu(void)
{
	struct davinci_timer *const wdttimer =
		(struct davinci_timer *)DAVINCI_WDOG_BASE;
	writel(0x08, &wdttimer->tgcr);
	writel(readl(&wdttimer->tgcr) | 0x03, &wdttimer->tgcr);
	writel(0, &wdttimer->tim12);
	writel(0, &wdttimer->tim34);
	writel(0, &wdttimer->prd12);
	writel(0, &wdttimer->prd34);
	writel(readl(&wdttimer->tcr) | 0x40, &wdttimer->tcr);
	writel(readl(&wdttimer->wdtcr) | 0x4000, &wdttimer->wdtcr);
	writel(0xa5c64000, &wdttimer->wdtcr);
	writel(0xda7e4000, &wdttimer->wdtcr);
	writel(0x4000, &wdttimer->wdtcr);
	while (1)
		/*nothing*/;
}