diff options
| author | Yuval Adam <_@yuv.al> | 2017-08-30 08:25:59 +0000 |
|---|---|---|
| committer | Yuval Adam <_@yuv.al> | 2017-08-30 08:25:59 +0000 |
| commit | 8e4bff4cab0ddac6060645b0715210484d02ff40 (patch) | |
| tree | 3a5c3024371a04692a3a6d9974d001cdff8ebf84 /arch/score/include/asm/delay.h | |
Diffstat (limited to 'arch/score/include/asm/delay.h')
| -rw-r--r-- | arch/score/include/asm/delay.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/score/include/asm/delay.h b/arch/score/include/asm/delay.h new file mode 100644 index 00000000..529e4947 --- /dev/null +++ b/arch/score/include/asm/delay.h @@ -0,0 +1,28 @@ +#ifndef _ASM_SCORE_DELAY_H +#define _ASM_SCORE_DELAY_H + +#include <asm-generic/param.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 */ |