| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* $Id: delay.h,v 1.11 2001/01/01 01:46:15 davem Exp $ |
| 2 | * delay.h: Linux delay routines on the Sparc. |
| 3 | * |
| 4 | * Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu). |
| 5 | */ |
| 6 | |
| 7 | #ifndef __SPARC_DELAY_H |
| 8 | #define __SPARC_DELAY_H |
| 9 | |
| 10 | #include <linux/config.h> |
| 11 | #include <asm/cpudata.h> |
| 12 | |
| 13 | extern __inline__ void __delay(unsigned long loops) |
| 14 | { |
| 15 | __asm__ __volatile__("cmp %0, 0\n\t" |
| 16 | "1: bne 1b\n\t" |
| 17 | "subcc %0, 1, %0\n" : |
| 18 | "=&r" (loops) : |
| 19 | "0" (loops) : |
| 20 | "cc"); |
| 21 | } |
| 22 | |
| 23 | /* This is too messy with inline asm on the Sparc. */ |
| 24 | extern void __udelay(unsigned long usecs, unsigned long lpj); |
| 25 | extern void __ndelay(unsigned long nsecs, unsigned long lpj); |
| 26 | |
| 27 | #ifdef CONFIG_SMP |
| 28 | #define __udelay_val cpu_data(smp_processor_id()).udelay_val |
| 29 | #else /* SMP */ |
| 30 | #define __udelay_val loops_per_jiffy |
| 31 | #endif /* SMP */ |
| 32 | #define udelay(__usecs) __udelay(__usecs, __udelay_val) |
| 33 | #define ndelay(__nsecs) __ndelay(__nsecs, __udelay_val) |
| 34 | |
| 35 | #endif /* defined(__SPARC_DELAY_H) */ |