LCOV - code coverage report
Current view: top level - lkbce/include/linux - delay.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 1 1 100.0 %
Date: 2017-01-25 Functions: 0 0 -

          Line data    Source code
       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             : 
      49             : static inline void ssleep(unsigned int seconds)
      50             : {
      51             :         msleep(seconds * 1000);
      52             : }
      53             : 
      54           1 : #endif /* defined(_LINUX_DELAY_H) */

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