From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- arch/alpha/include/asm/timex.h | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 arch/alpha/include/asm/timex.h (limited to 'arch/alpha/include/asm/timex.h') diff --git a/arch/alpha/include/asm/timex.h b/arch/alpha/include/asm/timex.h new file mode 100644 index 000000000..afa0c45e3 --- /dev/null +++ b/arch/alpha/include/asm/timex.h @@ -0,0 +1,31 @@ +/* + * linux/include/asm-alpha/timex.h + * + * ALPHA architecture timex specifications + */ +#ifndef _ASMALPHA_TIMEX_H +#define _ASMALPHA_TIMEX_H + +/* With only one or two oddballs, we use the RTC as the ticker, selecting + the 32.768kHz reference clock, which nicely divides down to our HZ. */ +#define CLOCK_TICK_RATE 32768 + +/* + * Standard way to access the cycle counter. + * Currently only used on SMP for scheduling. + * + * Only the low 32 bits are available as a continuously counting entity. + * But this only means we'll force a reschedule every 8 seconds or so, + * which isn't an evil thing. + */ + +typedef unsigned int cycles_t; + +static inline cycles_t get_cycles (void) +{ + cycles_t ret; + __asm__ __volatile__ ("rpcc %0" : "=r"(ret)); + return ret; +} + +#endif -- cgit v1.2.3-54-g00ecf