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. */ 15 static 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 27 static 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 39 static inline void set_clock_comparator(__u64 time) 40 { 41 asm volatile("sckc 0(%1)" : : "m" (time), "a" (&time)); 42 } 43 44 static 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 51 typedef unsigned long long cycles_t; 52 53 static 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 65 static inline unsigned long long get_clock_xt(void) 66 { 67 unsigned char clk[16]; 68 69 #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2) 70 asm volatile("stcke %0" : "=Q" (clk) : : "cc"); 71 #else /* __GNUC__ */ 72 asm volatile("stcke 0(%1)" : "=m" (clk) 73 : "a" (clk) : "cc"); 74 #endif /* __GNUC__ */ 75 76 return *((unsigned long long *)&clk[1]); 77 } 78 79 static inline cycles_t get_cycles(void) 80 { 81 return (cycles_t) get_clock() >> 2; 82 } 83 84 int get_sync_clock(unsigned long long *clock); 85 void init_cpu_timer(void); 86 unsigned long long monotonic_clock(void); 87 88 #endif 89