/arch/blackfin/kernel/exception.c

https://bitbucket.org/thekraven/iscream_thunderc-2.6.35 · C · 45 lines · 26 code · 13 blank · 6 comment · 6 complexity · eebae36049cd8392f6e4093833bb1b2f MD5 · raw file 

    

  1. /* Basic functions for adding/removing custom exception handlers
    2. 

  2.  *
    3. 

  3.  * Copyright 2004-2009 Analog Devices Inc.
    4. 

  4.  *
    5. 

  5.  * Licensed under the GPL-2 or later
    6. 

  6.  */
    7. 

  7. 

  8. #include <linux/module.h>
    9. 

  9. #include <asm/irq_handler.h>
    10. 

  10. 

  11. int bfin_request_exception(unsigned int exception, void (*handler)(void))
    12. 

  12. {
    13. 

  13. 	void (*curr_handler)(void);
    14. 

  14. 

  15. 	if (exception > 0x3F)
    16. 

  16. 		return -EINVAL;
    17. 

  17. 

  18. 	curr_handler = ex_table[exception];
    19. 

  19. 

  20. 	if (curr_handler != ex_replaceable)
    21. 

  21. 		return -EBUSY;
    22. 

  22. 

  23. 	ex_table[exception] = handler;
    24. 

  24. 

  25. 	return 0;
    26. 

  26. }
    27. 

  27. EXPORT_SYMBOL(bfin_request_exception);
    28. 

  28. 

  29. int bfin_free_exception(unsigned int exception, void (*handler)(void))
    30. 

  30. {
    31. 

  31. 	void (*curr_handler)(void);
    32. 

  32. 

  33. 	if (exception > 0x3F)
    34. 

  34. 		return -EINVAL;
    35. 

  35. 

  36. 	curr_handler = ex_table[exception];
    37. 

  37. 

  38. 	if (curr_handler != handler)
    39. 

  39. 		return -EBUSY;
    40. 

  40. 

  41. 	ex_table[exception] = ex_replaceable;
    42. 

  42. 

  43. 	return 0;
    44. 

  44. }
    45. 

  45. EXPORT_SYMBOL(bfin_free_exception);
    46.