arch/arm/mach-at91/armv7/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  * SPDX-License-Identifier:     GPL-2.0+
  10  */
  11
  12 #include <common.h>
  13 #include <asm/io.h>
  14 #include <asm/arch/hardware.h>
  15 #include <asm/arch/at91_rstc.h>
  16
  17 /* Reset the cpu by telling the reset controller to do so */
  18 void reset_cpu(ulong ignored)
  19 {
  20         at91_rstc_t *rstc = (at91_rstc_t *)ATMEL_BASE_RSTC;
  21
  22         writel(AT91_RSTC_KEY
  23                 | AT91_RSTC_CR_PROCRST  /* Processor Reset */
  24                 | AT91_RSTC_CR_PERRST   /* Peripheral Reset */
  25 #ifdef CONFIG_AT91RESET_EXTRST
  26                 | AT91_RSTC_CR_EXTRST   /* External Reset (assert nRST pin) */
  27 #endif
  28                 , &rstc->cr);
  29         /* never reached */
  30         do { } while (1);
  31 }