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#ifndef _PARISC_DELAY_H
#define _PARISC_DELAY_H
#include <asm/special_insns.h> /* for mfctl() */
#include <asm/processor.h> /* for boot_cpu_data */
/*
* Copyright (C) 1993 Linus Torvalds
*
* Delay routines
*/
static __inline__ void __delay(unsigned long loops) {
asm volatile(
" .balignl 64,0x34000034\n"
" addib,UV -1,%0,.\n"
" nop\n"
: "=r" (loops) : "0" (loops));
}
static __inline__ void __cr16_delay(unsigned long clocks) {
unsigned long start;
/*
* Note: Due to unsigned math, cr16 rollovers shouldn't be
* a problem here. However, on 32 bit, we need to make sure
* we don't pass in too big a value. The current default
* value of MAX_UDELAY_MS should help prevent this.
*/
start = mfctl(16);
while ((mfctl(16) - start) < clocks)
;
}
static __inline__ void __udelay(unsigned long usecs) {
__cr16_delay(usecs * ((unsigned long)boot_cpu_data.cpu_hz / 1000000UL));
}
#define udelay(n) __udelay(n)
#endif /* defined(_PARISC_DELAY_H) */
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