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m68knommu
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lib
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semaphore.S

semaphore.S 1.2 KB
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  1. /*
    2. 

  2.  *  linux/arch/m68k/lib/semaphore.S
    3. 

  3.  *
    4. 

  4.  *  Copyright (C) 1996  Linus Torvalds
    5. 

  5.  *
    6. 

  6.  *  m68k version by Andreas Schwab
    7. 

  7.  *
    8. 

  8.  *  MAR/1999 -- modified to support ColdFire (gerg@snapgear.com)
    9. 

  9.  */
    10. 

  10. 

  11. #include <linux/linkage.h>
    12. 

  12. #include <asm/semaphore.h>
    13. 

  13. 

  14. /*
    15. 

  15.  * "down_failed" is called with the eventual return address
    16. 

  16.  * in %a0, and the address of the semaphore in %a1. We need
    17. 

  17.  * to increment the number of waiters on the semaphore,
    18. 

  18.  * call "__down()", and then eventually return to try again.
    19. 

  19.  */
    20. 

  20. ENTRY(__down_failed)
    21. 

  21. #ifdef CONFIG_COLDFIRE
    22. 

  22. 	subl #12,%sp
    23. 

  23. 	moveml %a0/%d0/%d1,(%sp)
    24. 

  24. #else
    25. 

  25. 	moveml %a0/%d0/%d1,-(%sp)
    26. 

  26. #endif
    27. 

  27. 	movel %a1,-(%sp)
    28. 

  28. 	jbsr __down
    29. 

  29. 	movel (%sp)+,%a1
    30. 

  30. 	movel (%sp)+,%d0
    31. 

  31. 	movel (%sp)+,%d1
    32. 

  32. 	rts
    33. 

  33. 

  34. ENTRY(__down_failed_interruptible)
    35. 

  35. 	movel %a0,-(%sp)
    36. 

  36. 	movel %d1,-(%sp)
    37. 

  37. 	movel %a1,-(%sp)
    38. 

  38. 	jbsr __down_interruptible
    39. 

  39. 	movel (%sp)+,%a1
    40. 

  40. 	movel (%sp)+,%d1
    41. 

  41. 	rts
    42. 

  42. 

  43. ENTRY(__up_wakeup)
    44. 

  44. #ifdef CONFIG_COLDFIRE
    45. 

  45. 	subl #12,%sp
    46. 

  46. 	moveml %a0/%d0/%d1,(%sp)
    47. 

  47. #else
    48. 

  48. 	moveml %a0/%d0/%d1,-(%sp)
    49. 

  49. #endif
    50. 

  50. 	movel %a1,-(%sp)
    51. 

  51. 	jbsr __up
    52. 

  52. 	movel (%sp)+,%a1
    53. 

  53. 	movel (%sp)+,%d0
    54. 

  54. 	movel (%sp)+,%d1
    55. 

  55. 	rts
    56. 

  56. 

  57. ENTRY(__down_failed_trylock)
    58. 

  58. 	movel %a0,-(%sp)
    59. 

  59. 	movel %d1,-(%sp)
    60. 

  60. 	movel %a1,-(%sp)
    61. 

  61. 	jbsr __down_trylock
    62. 

  62. 	movel (%sp)+,%a1
    63. 

  63. 	movel (%sp)+,%d1
    64. 

  64. 	movel (%sp)+,%a0
    65. 

  65. 	rts
    66. 

  66.