1*a439fe51SSam Ravnborg /* 2*a439fe51SSam Ravnborg * delay.h: Linux delay routines on the Sparc. 3*a439fe51SSam Ravnborg * 4*a439fe51SSam Ravnborg * Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu). 5*a439fe51SSam Ravnborg */ 6*a439fe51SSam Ravnborg 7*a439fe51SSam Ravnborg #ifndef __SPARC_DELAY_H 8*a439fe51SSam Ravnborg #define __SPARC_DELAY_H 9*a439fe51SSam Ravnborg 10*a439fe51SSam Ravnborg #include <asm/cpudata.h> 11*a439fe51SSam Ravnborg 12*a439fe51SSam Ravnborg static inline void __delay(unsigned long loops) 13*a439fe51SSam Ravnborg { 14*a439fe51SSam Ravnborg __asm__ __volatile__("cmp %0, 0\n\t" 15*a439fe51SSam Ravnborg "1: bne 1b\n\t" 16*a439fe51SSam Ravnborg "subcc %0, 1, %0\n" : 17*a439fe51SSam Ravnborg "=&r" (loops) : 18*a439fe51SSam Ravnborg "0" (loops) : 19*a439fe51SSam Ravnborg "cc"); 20*a439fe51SSam Ravnborg } 21*a439fe51SSam Ravnborg 22*a439fe51SSam Ravnborg /* This is too messy with inline asm on the Sparc. */ 23*a439fe51SSam Ravnborg extern void __udelay(unsigned long usecs, unsigned long lpj); 24*a439fe51SSam Ravnborg extern void __ndelay(unsigned long nsecs, unsigned long lpj); 25*a439fe51SSam Ravnborg 26*a439fe51SSam Ravnborg #ifdef CONFIG_SMP 27*a439fe51SSam Ravnborg #define __udelay_val cpu_data(smp_processor_id()).udelay_val 28*a439fe51SSam Ravnborg #else /* SMP */ 29*a439fe51SSam Ravnborg #define __udelay_val loops_per_jiffy 30*a439fe51SSam Ravnborg #endif /* SMP */ 31*a439fe51SSam Ravnborg #define udelay(__usecs) __udelay(__usecs, __udelay_val) 32*a439fe51SSam Ravnborg #define ndelay(__nsecs) __ndelay(__nsecs, __udelay_val) 33*a439fe51SSam Ravnborg 34*a439fe51SSam Ravnborg #endif /* defined(__SPARC_DELAY_H) */ 35