arch/arm/cpu/armv7/at91/reset.c

   1 /*
   2  * (C) Copyright 2007-2008
   3  * Stelian Pop <stelian@popies.net>
   4  * Lead Tech Design <www.leadtechdesign.com>
   5  *
   6  * (C) Copyright 2013
   7  * Bo Shen <voice.shen@atmel.com>
   8  *
   9  * See file CREDITS for list of people who contributed to this
  10  * project.
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License as
  14  * published by the Free Software Foundation; either version 2 of
  15  * the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  25  * MA 02111-1307 USA
  26  */
  27
  28 #include <common.h>
  29 #include <asm/io.h>
  30 #include <asm/arch/hardware.h>
  31 #include <asm/arch/at91_rstc.h>
  32
  33 /* Reset the cpu by telling the reset controller to do so */
  34 void reset_cpu(ulong ignored)
  35 {
  36         at91_rstc_t *rstc = (at91_rstc_t *)ATMEL_BASE_RSTC;
  37
  38         writel(AT91_RSTC_KEY
  39                 | AT91_RSTC_CR_PROCRST  /* Processor Reset */
  40                 | AT91_RSTC_CR_PERRST   /* Peripheral Reset */
  41 #ifdef CONFIG_AT91RESET_EXTRST
  42                 | AT91_RSTC_CR_EXTRST   /* External Reset (assert nRST pin) */
  43 #endif
  44                 , &rstc->cr);
  45         /* never reached */
  46         do { } while (1);
  47 }