1 /*
2  *  include/asm-s390/timex.h
3  *
4  *  S390 version
5  *    Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
6  *
7  *  Derived from "include/asm-i386/timex.h"
8  *    Copyright (C) 1992, Linus Torvalds
9  */
10 
11 #ifndef _ASM_S390_TIMEX_H
12 #define _ASM_S390_TIMEX_H
13 
14 #define CLOCK_TICK_RATE	1193180 /* Underlying HZ */
15 #define CLOCK_TICK_FACTOR	20	/* Factor of both 1000000 and CLOCK_TICK_RATE */
16 #define FINETUNE ((((((long)LATCH * HZ - CLOCK_TICK_RATE) << SHIFT_HZ) * \
17 	(1000000/CLOCK_TICK_FACTOR) / (CLOCK_TICK_RATE/CLOCK_TICK_FACTOR)) \
18 		<< (SHIFT_SCALE-SHIFT_HZ)) / HZ)
19 
20 typedef unsigned long long cycles_t;
21 
22 extern cycles_t cacheflush_time;
23 
get_cycles(void)24 static inline cycles_t get_cycles(void)
25 {
26 	cycles_t cycles;
27 
28 	__asm__("stck 0(%0)" : : "a" (&(cycles)) : "memory", "cc");
29 	return cycles >> 2;
30 }
31 
get_clock(void)32 static inline unsigned long long get_clock (void)
33 {
34 	unsigned long long clk;
35 
36 	__asm__("stck 0(%0)" : : "a" (&(clk)) : "memory", "cc");
37 	return clk;
38 }
39 
40 #define vxtime_lock()		do {} while (0)
41 #define vxtime_unlock()		do {} while (0)
42 
43 #endif
44