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kernel/linux-rt-4.4.41/arch/parisc/include/asm/delay.h 494 Bytes
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  #ifndef _ASM_PARISC_DELAY_H
  #define _ASM_PARISC_DELAY_H
  
  static __inline__ void __delay(unsigned long loops) {
  	asm volatile(
  	"	.balignl	64,0x34000034
  "
  	"	addib,UV -1,%0,.
  "
  	"	nop
  "
  		: "=r" (loops) : "0" (loops));
  }
  
  extern void __udelay(unsigned long usecs);
  extern void __udelay_bad(unsigned long usecs);
  
  static inline void udelay(unsigned long usecs)
  {
  	if (__builtin_constant_p(usecs) && (usecs) > 20000)
  		__udelay_bad(usecs);
  	__udelay(usecs);
  }
  
  #endif /* _ASM_PARISC_DELAY_H */