1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * delay.h: Linux delay routines on the Sparc.
4 *
5 * Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu).
6 */
7
8 #ifndef __SPARC_DELAY_H
9 #define __SPARC_DELAY_H
10
11 #include <asm/cpudata.h>
12
13 static 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 "" (loops) :
20 "cc");
21 }
22
23 /* This is too messy with inline asm on the Sparc. */
24 void __udelay(unsigned long usecs, unsigned long lpj);
25 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) */
36
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