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/* Inline functions for clock register access. */ 15static inline int set_clock(__u64 time) 16{ 17 int cc; 18 19 asm volatile( 20 " sck 0(%2)\n" 21 " ipm %0\n" 22 " srl %0,28\n" 23 : "=d" (cc) : "m" (time), "a" (&time) : "cc"); 24 return cc; 25} 26 27static inline int store_clock(__u64 *time) 28{ 29 int cc; 30 31 asm volatile( 32 " stck 0(%2)\n" 33 " ipm %0\n" 34 " srl %0,28\n" 35 : "=d" (cc), "=m" (*time) : "a" (time) : "cc"); 36 return cc; 37} 38 39static inline void set_clock_comparator(__u64 time) 40{ 41 asm volatile("sckc 0(%1)" : : "m" (time), "a" (&time)); 42} 43 44static inline void store_clock_comparator(__u64 *time) 45{ 46 asm volatile("stckc 0(%1)" : "=m" (*time) : "a" (time)); 47} 48 49#define CLOCK_TICK_RATE 1193180 /* Underlying HZ */ 50 51typedef unsigned long long cycles_t; 52 53static inline unsigned long long get_clock (void) 54{ 55 unsigned long long clk; 56 57#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2) 58 asm volatile("stck %0" : "=Q" (clk) : : "cc"); 59#else /* __GNUC__ */ 60 asm volatile("stck 0(%1)" : "=m" (clk) : "a" (&clk) : "cc"); 61#endif /* __GNUC__ */ 62 return clk; 63} 64 65static inline void get_clock_extended(void *dest) 66{ 67 typedef struct { unsigned long long clk[2]; } __clock_t; 68 69#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2) 70 asm volatile("stcke %0" : "=Q" (*((__clock_t *)dest)) : : "cc"); 71#else /* __GNUC__ */ 72 asm volatile("stcke 0(%1)" : "=m" (*((__clock_t *)dest)) 73 : "a" ((__clock_t *)dest) : "cc"); 74#endif /* __GNUC__ */ 75} 76 77static inline cycles_t get_cycles(void) 78{ 79 return (cycles_t) get_clock() >> 2; 80} 81 82int get_sync_clock(unsigned long long *clock); 83void init_cpu_timer(void); 84 85#endif 86