reset.c 1.5 KB

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  1. /*
  2. * (C) Copyright 2009
  3. * Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com.
  4. *
  5. * See file CREDITS for list of people who contributed to this
  6. * project.
  7. *
  8. * This program is free software; you can redistribute it and/or
  9. * modify it under the terms of the GNU General Public License as
  10. * published by the Free Software Foundation; either version 2 of
  11. * the License, or (at your option) any later version.
  12. *
  13. * This program is distributed in the hope that it will be useful,
  14. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16. * GNU General Public License for more details.
  17. *
  18. * You should have received a copy of the GNU General Public License
  19. * along with this program; if not, write to the Free Software
  20. * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21. * MA 02111-1307 USA
  22. */
  23. #include <common.h>
  24. #include <asm/io.h>
  25. #include <asm/arch/hardware.h>
  26. #include <asm/arch/spr_syscntl.h>
  27. void reset_cpu(ulong ignored)
  28. {
  29. struct syscntl_regs *syscntl_regs_p =
  30. (struct syscntl_regs *)CONFIG_SPEAR_SYSCNTLBASE;
  31. printf("System is going to reboot ...\n");
  32. /*
  33. * This 1 second delay will allow the above message
  34. * to be printed before reset
  35. */
  36. udelay((1000 * 1000));
  37. /* Going into slow mode before resetting SOC */
  38. writel(0x02, &syscntl_regs_p->scctrl);
  39. /*
  40. * Writing any value to the system status register will
  41. * reset the SoC
  42. */
  43. writel(0x00, &syscntl_regs_p->scsysstat);
  44. /* system will restart */
  45. while (1)
  46. ;
  47. }