Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef _ASM_SCORE_DELAY_H
2#define _ASM_SCORE_DELAY_H
3
4#include <asm-generic/param.h>
5
6static inline void __delay(unsigned long loops)
7{
8 /* 3 cycles per loop. */
9 __asm__ __volatile__ (
10 "1:\tsubi\t%0, 3\n\t"
11 "cmpz.c\t%0\n\t"
12 "ble\t1b\n\t"
13 : "=r" (loops)
14 : "0" (loops));
15}
16
17static inline void __udelay(unsigned long usecs)
18{
19 unsigned long loops_per_usec;
20
21 loops_per_usec = (loops_per_jiffy * HZ) / 1000000;
22
23 __delay(usecs * loops_per_usec);
24}
25
26#define udelay(usecs) __udelay(usecs)
27
28#endif /* _ASM_SCORE_DELAY_H */