u-boot-brain/arch/arm/mach-at91/arm920t/reset.c

42 lines
908 B
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2002
* Lineo, Inc. <www.lineo.com>
* Bernhard Kuhn <bkuhn@lineo.com>
*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Alex Zuepke <azu@sysgo.de>
*/
#include <common.h>
#include <cpu_func.h>
#include <asm/io.h>
#include <asm/arch/hardware.h>
#include <asm/arch/at91_st.h>
void __attribute__((weak)) board_reset(void)
{
/* true empty function for defining weak symbol */
}
void reset_cpu(void)
{
at91_st_t *st = (at91_st_t *) ATMEL_BASE_ST;
board_reset();
/* Reset the cpu by setting up the watchdog timer */
writel(AT91_ST_WDMR_RSTEN | AT91_ST_WDMR_EXTEN | AT91_ST_WDMR_WDV(2),
&st->wdmr);
writel(AT91_ST_CR_WDRST, &st->cr);
/* and let it timeout */
while (1)
;
/* Never reached */
}