Subversion Repositories Kolibri OS

Rev

Rev 4559 | Blame | Compare with Previous | Last modification | View Log | Download | RSS feed

  1. #ifndef _LINUX_DELAY_H
  2. #define _LINUX_DELAY_H
  3.  
  4. /*
  5.  * Copyright (C) 1993 Linus Torvalds
  6.  *
  7.  * Delay routines, using a pre-computed "loops_per_jiffy" value.
  8.  */
  9.  
  10. #include <linux/kernel.h>
  11.  
  12. extern unsigned long loops_per_jiffy;
  13.  
  14. #include <asm/delay.h>
  15.  
  16. /*
  17.  * Using udelay() for intervals greater than a few milliseconds can
  18.  * risk overflow for high loops_per_jiffy (high bogomips) machines. The
  19.  * mdelay() provides a wrapper to prevent this.  For delays greater
  20.  * than MAX_UDELAY_MS milliseconds, the wrapper is used.  Architecture
  21.  * specific values can be defined in asm-???/delay.h as an override.
  22.  * The 2nd mdelay() definition ensures GCC will optimize away the
  23.  * while loop for the common cases where n <= MAX_UDELAY_MS  --  Paul G.
  24.  */
  25.  
  26. #ifndef MAX_UDELAY_MS
  27. #define MAX_UDELAY_MS   5
  28. #endif
  29.  
  30. #ifndef mdelay
  31. #define mdelay(n) (\
  32.         (__builtin_constant_p(n) && (n)<=MAX_UDELAY_MS) ? udelay((n)*1000) : \
  33.         ({unsigned long __ms=(n); while (__ms--) udelay(1000);}))
  34. #endif
  35.  
  36. #ifndef ndelay
  37. static inline void ndelay(unsigned long x)
  38. {
  39.         udelay(DIV_ROUND_UP(x, 1000));
  40. }
  41. #define ndelay(x) ndelay(x)
  42. #endif
  43.  
  44. extern unsigned long lpj_fine;
  45. void calibrate_delay(void);
  46. void msleep(unsigned int msecs);
  47. unsigned long msleep_interruptible(unsigned int msecs);
  48. void usleep_range(unsigned long min, unsigned long max);
  49.  
  50. static inline void ssleep(unsigned int seconds)
  51. {
  52.         msleep(seconds * 1000);
  53. }
  54.  
  55. #endif /* defined(_LINUX_DELAY_H) */
  56.