mirror of https://gitee.com/openkylin/linux.git
35 lines
882 B
C
35 lines
882 B
C
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/*
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* delay.h: Linux delay routines on the Sparc.
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*
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* Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu).
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*/
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#ifndef __SPARC_DELAY_H
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#define __SPARC_DELAY_H
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#include <asm/cpudata.h>
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static inline void __delay(unsigned long loops)
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{
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__asm__ __volatile__("cmp %0, 0\n\t"
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"1: bne 1b\n\t"
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"subcc %0, 1, %0\n" :
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"=&r" (loops) :
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"0" (loops) :
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"cc");
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}
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/* This is too messy with inline asm on the Sparc. */
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extern void __udelay(unsigned long usecs, unsigned long lpj);
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extern void __ndelay(unsigned long nsecs, unsigned long lpj);
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#ifdef CONFIG_SMP
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#define __udelay_val cpu_data(smp_processor_id()).udelay_val
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#else /* SMP */
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#define __udelay_val loops_per_jiffy
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#endif /* SMP */
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#define udelay(__usecs) __udelay(__usecs, __udelay_val)
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#define ndelay(__nsecs) __ndelay(__nsecs, __udelay_val)
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#endif /* defined(__SPARC_DELAY_H) */
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