mirror of
https://github.com/torvalds/linux.git
synced 2024-10-31 17:21:49 +00:00
32 lines
758 B
C
32 lines
758 B
C
|
/*
|
||
|
|
* 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
|