Linux 2.6.26-rc5
[linux-2.6/openmoko-kernel/knife-kernel.git] / include / asm-alpha / timex.h
blobafa0c45e3e987a80b91c0db09aa3352d95628c36
1 /*
2 * linux/include/asm-alpha/timex.h
4 * ALPHA architecture timex specifications
5 */
6 #ifndef _ASMALPHA_TIMEX_H
7 #define _ASMALPHA_TIMEX_H
9 /* With only one or two oddballs, we use the RTC as the ticker, selecting
10 the 32.768kHz reference clock, which nicely divides down to our HZ. */
11 #define CLOCK_TICK_RATE 32768
14 * Standard way to access the cycle counter.
15 * Currently only used on SMP for scheduling.
17 * Only the low 32 bits are available as a continuously counting entity.
18 * But this only means we'll force a reschedule every 8 seconds or so,
19 * which isn't an evil thing.
22 typedef unsigned int cycles_t;
24 static inline cycles_t get_cycles (void)
26 cycles_t ret;
27 __asm__ __volatile__ ("rpcc %0" : "=r"(ret));
28 return ret;
31 #endif