arch/arm/cpu/arm926ejs/davinci/reset.c

   1 /*
   2  *  Processor reset using WDT.
   3  *
   4  * Copyright (C) 2012 Dmitry Bondar <bond@inmys.ru>
   5  * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <common.h>
  11 #include <asm/io.h>
  12 #include <asm/arch/timer_defs.h>
  13 #include <asm/arch/hardware.h>
  14
  15 void reset_cpu(unsigned long a)
  16 {
  17         struct davinci_timer *const wdttimer =
  18                 (struct davinci_timer *)DAVINCI_WDOG_BASE;
  19         writel(0x08, &wdttimer->tgcr);
  20         writel(readl(&wdttimer->tgcr) | 0x03, &wdttimer->tgcr);
  21         writel(0, &wdttimer->tim12);
  22         writel(0, &wdttimer->tim34);
  23         writel(0, &wdttimer->prd12);
  24         writel(0, &wdttimer->prd34);
  25         writel(readl(&wdttimer->tcr) | 0x40, &wdttimer->tcr);
  26         writel(readl(&wdttimer->wdtcr) | 0x4000, &wdttimer->wdtcr);
  27         writel(0xa5c64000, &wdttimer->wdtcr);
  28         writel(0xda7e4000, &wdttimer->wdtcr);
  29         writel(0x4000, &wdttimer->wdtcr);
  30         while (1)
  31                 /*nothing*/;
  32 }