mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-24 03:24:55 +08:00
89 lines
1.8 KiB
C
89 lines
1.8 KiB
C
/*
|
|
* 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 unsigned long long get_clock_xt(void)
|
|
{
|
|
unsigned char clk[16];
|
|
|
|
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
|
|
asm volatile("stcke %0" : "=Q" (clk) : : "cc");
|
|
#else /* __GNUC__ */
|
|
asm volatile("stcke 0(%1)" : "=m" (clk)
|
|
: "a" (clk) : "cc");
|
|
#endif /* __GNUC__ */
|
|
|
|
return *((unsigned long long *)&clk[1]);
|
|
}
|
|
|
|
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);
|
|
unsigned long long monotonic_clock(void);
|
|
|
|
#endif
|