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#ifndef _PARISC_DELAY_H #define _PARISC_DELAY_H #include <asm/system.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) */ |