LXR uboot/arch/arm/cpu/arm926ejs/mx27/reset.c

   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 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   8 * Alex Zuepke <azu@sysgo.de>
   9 *
  10 * (C) Copyright 2002
  11 * Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
  12 *
  13 * (C) Copyright 2009
  14 * Ilya Yanok, Emcraft Systems Ltd, <yanok@emcraft.com>
  15 *
  16 * SPDX-License-Identifier:     GPL-2.0+
  17 */
  18
  19#include <common.h>
  20#include <asm/io.h>
  21#include <asm/arch/imx-regs.h>
  22
  23/*
  24 * Reset the cpu by setting up the watchdog timer and let it time out
  25 */
  26void reset_cpu(ulong ignored)
  27{
  28        struct wdog_regs *regs = (struct wdog_regs *)IMX_WDT_BASE;
  29        /* Disable watchdog and set Time-Out field to 0 */
  30        writew(0x0000, &regs->wcr);
  31
  32        /* Write Service Sequence */
  33        writew(0x5555, &regs->wsr);
  34        writew(0xAAAA, &regs->wsr);
  35
  36        /* Enable watchdog */
  37        writew(WCR_WDE, &regs->wcr);
  38
  39        while (1);
  40        /*NOTREACHED*/
  41}
  42