time.c 1.2 KB

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  1. /*
  2. * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
  3. * Scott McNutt <smcnutt@psyent.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 <watchdog.h>
  25. extern void dly_clks( unsigned long ticks );
  26. void __udelay(unsigned long usec)
  27. {
  28. /* The Nios core doesn't have a timebase, so we do our
  29. * best for now and call a low-level loop that counts
  30. * cpu clocks.
  31. */
  32. unsigned long cnt = (CONFIG_SYS_CLK_FREQ/1000000) * usec;
  33. dly_clks (cnt);
  34. }