diff options
Diffstat (limited to 'arch/score/include/asm/delay.h')
| -rw-r--r-- | arch/score/include/asm/delay.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/score/include/asm/delay.h b/arch/score/include/asm/delay.h new file mode 100644 index 000000000000..6726ec199dc0 --- /dev/null +++ b/arch/score/include/asm/delay.h @@ -0,0 +1,26 @@ +#ifndef _ASM_SCORE_DELAY_H +#define _ASM_SCORE_DELAY_H + +static inline void __delay(unsigned long loops) +{ + /* 3 cycles per loop. */ + __asm__ __volatile__ ( + "1:\tsubi\t%0, 3\n\t" + "cmpz.c\t%0\n\t" + "ble\t1b\n\t" + : "=r" (loops) + : "0" (loops)); +} + +static inline void __udelay(unsigned long usecs) +{ + unsigned long loops_per_usec; + + loops_per_usec = (loops_per_jiffy * HZ) / 1000000; + + __delay(usecs * loops_per_usec); +} + +#define udelay(usecs) __udelay(usecs) + +#endif /* _ASM_SCORE_DELAY_H */ |