git.sur5r.net Git - u-boot/blob - arch/arm/mach-davinci/reset.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  *  Processor reset using WDT.
   4  *
   5  * Copyright (C) 2012 Dmitry Bondar <bond@inmys.ru>
   6  * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
   7  */
   8
   9 #include <common.h>
  10 #include <asm/io.h>
  11 #include <asm/arch/timer_defs.h>
  12 #include <asm/arch/hardware.h>
  13
  14 void reset_cpu(unsigned long a)
  15 {
  16         struct davinci_timer *const wdttimer =
  17                 (struct davinci_timer *)DAVINCI_WDOG_BASE;
  18         writel(0x08, &wdttimer->tgcr);
  19         writel(readl(&wdttimer->tgcr) | 0x03, &wdttimer->tgcr);
  20         writel(0, &wdttimer->tim12);
  21         writel(0, &wdttimer->tim34);
  22         writel(0, &wdttimer->prd12);
  23         writel(0, &wdttimer->prd34);
  24         writel(readl(&wdttimer->tcr) | 0x40, &wdttimer->tcr);
  25         writel(readl(&wdttimer->wdtcr) | 0x4000, &wdttimer->wdtcr);
  26         writel(0xa5c64000, &wdttimer->wdtcr);
  27         writel(0xda7e4000, &wdttimer->wdtcr);
  28         writel(0x4000, &wdttimer->wdtcr);
  29         while (1)
  30                 /*nothing*/;
  31 }