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1da177e4 LT |
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 | ||
3115624e | 13 | static inline void __delay(unsigned long loops) |
1da177e4 LT |
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) */ |