mirror of https://gitee.com/openkylin/linux.git
88 lines
1.7 KiB
C
88 lines
1.7 KiB
C
/*
|
|
* linux/arch/m68knommu/kernel/time.c
|
|
*
|
|
* Copyright (C) 1991, 1992, 1995 Linus Torvalds
|
|
*
|
|
* This file contains the m68k-specific time handling details.
|
|
* Most of the stuff is located in the machine specific files.
|
|
*
|
|
* 1997-09-10 Updated NTP code according to technical memorandum Jan '96
|
|
* "A Kernel Model for Precision Timekeeping" by Dave Mills
|
|
*/
|
|
|
|
#include <linux/errno.h>
|
|
#include <linux/module.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/param.h>
|
|
#include <linux/string.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/profile.h>
|
|
#include <linux/time.h>
|
|
#include <linux/timex.h>
|
|
|
|
#include <asm/machdep.h>
|
|
#include <asm/irq_regs.h>
|
|
|
|
#define TICK_SIZE (tick_nsec / 1000)
|
|
|
|
static inline int set_rtc_mmss(unsigned long nowtime)
|
|
{
|
|
if (mach_set_clock_mmss)
|
|
return mach_set_clock_mmss (nowtime);
|
|
return -1;
|
|
}
|
|
|
|
#ifndef CONFIG_GENERIC_CLOCKEVENTS
|
|
/*
|
|
* timer_interrupt() needs to keep up the real-time clock,
|
|
* as well as call the "xtime_update()" routine every clocktick
|
|
*/
|
|
irqreturn_t arch_timer_interrupt(int irq, void *dummy)
|
|
{
|
|
|
|
if (current->pid)
|
|
profile_tick(CPU_PROFILING);
|
|
|
|
xtime_update(1);
|
|
|
|
update_process_times(user_mode(get_irq_regs()));
|
|
|
|
return(IRQ_HANDLED);
|
|
}
|
|
#endif
|
|
|
|
static unsigned long read_rtc_mmss(void)
|
|
{
|
|
unsigned int year, mon, day, hour, min, sec;
|
|
|
|
if (mach_gettod) {
|
|
mach_gettod(&year, &mon, &day, &hour, &min, &sec);
|
|
if ((year += 1900) < 1970)
|
|
year += 100;
|
|
} else {
|
|
year = 1970;
|
|
mon = day = 1;
|
|
hour = min = sec = 0;
|
|
}
|
|
|
|
|
|
return mktime(year, mon, day, hour, min, sec);
|
|
}
|
|
|
|
void read_persistent_clock(struct timespec *ts)
|
|
{
|
|
ts->tv_sec = read_rtc_mmss();
|
|
ts->tv_nsec = 0;
|
|
}
|
|
|
|
int update_persistent_clock(struct timespec now)
|
|
{
|
|
return set_rtc_mmss(now.tv_sec);
|
|
}
|
|
|
|
void time_init(void)
|
|
{
|
|
hw_timer_init();
|
|
}
|