include/asm-sparc64/delay.h

   1 /* delay.h: Linux delay routines on sparc64.
   2  *
   3  * Copyright (C) 1996, 2004 David S. Miller (davem@davemloft.net).
   4  *
   5  * Based heavily upon x86 variant which is:
   6  * Copyright (C) 1993 Linus Torvalds
   7  *
   8  * Delay routines calling functions in arch/sparc64/lib/delay.c
   9  */
  10
  11 #ifndef __SPARC64_DELAY_H
  12 #define __SPARC64_DELAY_H
  13
  14 #include <linux/param.h>
  15 #include <asm/cpudata.h>
  16
  17 #ifndef __ASSEMBLY__
  18
  19 extern void __bad_udelay(void);
  20 extern void __bad_ndelay(void);
  21
  22 extern void __udelay(unsigned long usecs);
  23 extern void __ndelay(unsigned long nsecs);
  24 extern void __const_udelay(unsigned long usecs);
  25 extern void __delay(unsigned long loops);
  26
  27 #define udelay(n) (__builtin_constant_p(n) ? \
  28         ((n) > 20000 ? __bad_udelay() : __const_udelay((n) * 0x10c7ul)) : \
  29         __udelay(n))
  30
  31 #define ndelay(n) (__builtin_constant_p(n) ? \
  32         ((n) > 20000 ? __bad_ndelay() : __const_udelay((n) * 5ul)) : \
  33         __ndelay(n))
  34
  35 #endif /* !__ASSEMBLY__ */
  36
  37 #endif /* defined(__SPARC64_DELAY_H) */