1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * linux/include/asm-alpha/timex.h
4  *
5  * ALPHA architecture timex specifications
6  */
7 #ifndef _ASMALPHA_TIMEX_H
8 #define _ASMALPHA_TIMEX_H
9 
10 /* With only one or two oddballs, we use the RTC as the ticker, selecting
11    the 32.768kHz reference clock, which nicely divides down to our HZ.  */
12 #define CLOCK_TICK_RATE	32768
13 
14 /*
15  * Standard way to access the cycle counter.
16  * Currently only used on SMP for scheduling.
17  *
18  * Only the low 32 bits are available as a continuously counting entity.
19  * But this only means we'll force a reschedule every 8 seconds or so,
20  * which isn't an evil thing.
21  */
22 
23 typedef unsigned int cycles_t;
24 
get_cycles(void)25 static inline cycles_t get_cycles (void)
26 {
27 	cycles_t ret;
28 	__asm__ __volatile__ ("rpcc %0" : "=r"(ret));
29 	return ret;
30 }
31 
32 #endif
33