From 8e4bff4cab0ddac6060645b0715210484d02ff40 Mon Sep 17 00:00:00 2001 From: Yuval Adam <_@yuv.al> Date: Wed, 30 Aug 2017 08:25:59 +0000 Subject: Initial file dump from open source release --- arch/score/include/asm/delay.h | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 arch/score/include/asm/delay.h (limited to 'arch/score/include/asm/delay.h') 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 + +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 */ -- cgit v1.3.1