interrupts.c 2.0 KB

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  1. /*
  2. * (C) Copyright -2003
  3. * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  4. *
  5. * (C) Copyright 2001
  6. * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
  7. *
  8. * See file CREDITS for list of people who contributed to this
  9. * project.
  10. *
  11. * This program is free software; you can redistribute it and/or
  12. * modify it under the terms of the GNU General Public License as
  13. * published by the Free Software Foundation; either version 2 of
  14. * the License, or (at your option) any later version.
  15. *
  16. * This program is distributed in the hope that it will be useful,
  17. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  19. * GNU General Public License for more details.
  20. *
  21. * You should have received a copy of the GNU General Public License
  22. * along with this program; if not, write to the Free Software
  23. * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24. * MA 02111-1307 USA
  25. */
  26. /*
  27. * interrupts.c - just enough support for the decrementer/timer
  28. */
  29. #include <common.h>
  30. #include <asm/processor.h>
  31. #include <command.h>
  32. int interrupt_init_cpu (ulong * decrementer_count)
  33. {
  34. *decrementer_count = get_tbclk () / CONFIG_SYS_HZ;
  35. return (0);
  36. }
  37. /****************************************************************************/
  38. /*
  39. * Handle external interrupts
  40. */
  41. void external_interrupt (struct pt_regs *regs)
  42. {
  43. puts ("external_interrupt (oops!)\n");
  44. }
  45. void timer_interrupt_cpu (struct pt_regs *regs)
  46. {
  47. /* nothing to do here */
  48. return;
  49. }
  50. /****************************************************************************/
  51. /*
  52. * Install and free a interrupt handler.
  53. */
  54. void irq_install_handler (int vec, interrupt_handler_t * handler, void *arg)
  55. {
  56. }
  57. void irq_free_handler (int vec)
  58. {
  59. }
  60. /****************************************************************************/
  61. void
  62. do_irqinfo (cmd_tbl_t * cmdtp, bd_t * bd, int flag, int argc, char *argv[])
  63. {
  64. puts ("IRQ related functions are unimplemented currently.\n");
  65. }