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/*
* include/asm-s390/timex.h
*
* S390 version
* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
*
* Derived from "include/asm-i386/timex.h"
* Copyright (C) 1992, Linus Torvalds
*/
#ifndef _ASM_S390_TIMEX_H
#define _ASM_S390_TIMEX_H
/* Inline functions for clock register access. */
static inline int set_clock(__u64 time)
{
int cc;
asm volatile(
" sck 0(%2)\n"
" ipm %0\n"
" srl %0,28\n"
: "=d" (cc) : "m" (time), "a" (&time) : "cc");
return cc;
}
static inline int store_clock(__u64 *time)
{
int cc;
asm volatile(
" stck 0(%2)\n"
" ipm %0\n"
" srl %0,28\n"
: "=d" (cc), "=m" (*time) : "a" (time) : "cc");
return cc;
}
static inline void set_clock_comparator(__u64 time)
{
asm volatile("sckc 0(%1)" : : "m" (time), "a" (&time));
}
static inline void store_clock_comparator(__u64 *time)
{
asm volatile("stckc 0(%1)" : "=m" (*time) : "a" (time));
}
#define CLOCK_TICK_RATE 1193180 /* Underlying HZ */
typedef unsigned long long cycles_t;
static inline unsigned long long get_clock (void)
{
unsigned long long clk;
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
asm volatile("stck %0" : "=Q" (clk) : : "cc");
#else /* __GNUC__ */
asm volatile("stck 0(%1)" : "=m" (clk) : "a" (&clk) : "cc");
#endif /* __GNUC__ */
return clk;
}
static inline void get_clock_extended(void *dest)
{
typedef struct { unsigned long long clk[2]; } __clock_t;
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
asm volatile("stcke %0" : "=Q" (*((__clock_t *)dest)) : : "cc");
#else /* __GNUC__ */
asm volatile("stcke 0(%1)" : "=m" (*((__clock_t *)dest))
: "a" ((__clock_t *)dest) : "cc");
#endif /* __GNUC__ */
}
static inline cycles_t get_cycles(void)
{
return (cycles_t) get_clock() >> 2;
}
int get_sync_clock(unsigned long long *clock);
void init_cpu_timer(void);
#endif
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