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

   1/*
   2 * (C) Copyright 2009
   3 * Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com.
   4 *
   5 * SPDX-License-Identifier:     GPL-2.0+
   6 */
   7
   8#include <common.h>
   9#include <asm/io.h>
  10#include <asm/arch/hardware.h>
  11#include <asm/arch/spr_syscntl.h>
  12
  13void reset_cpu(ulong ignored)
  14{
  15        struct syscntl_regs *syscntl_regs_p =
  16            (struct syscntl_regs *)CONFIG_SPEAR_SYSCNTLBASE;
  17
  18        printf("System is going to reboot ...\n");
  19
  20        /*
  21         * This 1 second delay will allow the above message
  22         * to be printed before reset
  23         */
  24        udelay((1000 * 1000));
  25
  26        /* Going into slow mode before resetting SOC */
  27        writel(0x02, &syscntl_regs_p->scctrl);
  28
  29        /*
  30         * Writing any value to the system status register will
  31         * reset the SoC
  32         */
  33        writel(0x00, &syscntl_regs_p->scsysstat);
  34
  35        /* system will restart */
  36        while (1)
  37                ;
  38}
  39