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| author | Ingo Molnar <mingo@elte.hu> | 2009-09-20 20:24:58 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-09-20 20:25:03 +0200 |
| commit | bfefb7a0c6e08736f2d5917c468467f134bf28bb (patch) | |
| tree | 7aa7084114dc083fe5b4d7b532901bdeb67188e7 /arch/score/include/asm/delay.h | |
| parent | 8d0cc631f6dd0a9283ceb7d61d8b85ecbcd355ea (diff) | |
| parent | 78f28b7c555359c67c2a0d23f7436e915329421e (diff) | |
Merge branch 'linus' into x86/urgent
Merge reason: Bring in changes that the next patch will depend on.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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 00000000000..6726ec199dc --- /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 */ |