u-boot/arch/arm/cpu/arm926ejs/davinci/reset.c
Davide Bonfanti 21f11c7b49 davinci: fixed cpu reset
The reset procedure works on watchdog timer while before it was modifying
TIMER_1 registers.
Tested on DM365.

Signed-off-by: Davide Bonfanti <davide.bonfanti@bticino.it>
2012-12-10 08:56:38 -07:00

33 lines
991 B
C

/*
* Processor reset using WDT.
*
* Copyright (C) 2012 Dmitry Bondar <bond@inmys.ru>
* Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
*
* This file is released under the terms of GPL v2 and any later version.
* See the file COPYING in the root directory of the source tree for details.
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/timer_defs.h>
#include <asm/arch/hardware.h>
void reset_cpu(unsigned long a)
{
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*/;
}