2 * linux/arch/h8300/kernel/time.c
4 * Yoshinori Sato <ysato@users.sourceforge.jp>
8 * linux/arch/m68k/kernel/time.c
10 * Copyright (C) 1991, 1992, 1995 Linus Torvalds
12 * This file contains the m68k-specific time handling details.
13 * Most of the stuff is located in the machine specific files.
15 * 1997-09-10 Updated NTP code according to technical memorandum Jan '96
16 * "A Kernel Model for Precision Timekeeping" by Dave Mills
19 #include <linux/errno.h>
20 #include <linux/module.h>
21 #include <linux/sched.h>
22 #include <linux/kernel.h>
23 #include <linux/param.h>
24 #include <linux/string.h>
26 #include <linux/timex.h>
27 #include <linux/profile.h>
30 #include <asm/target_time.h>
32 #define TICK_SIZE (tick_nsec / 1000)
35 * timer_interrupt() needs to keep up the real-time clock,
36 * as well as call the "do_timer()" routine every clocktick
38 static void timer_interrupt(int irq, void *dummy, struct pt_regs * regs)
40 /* may need to kick the hardware timer */
45 update_process_times(user_mode(regs));
47 profile_tick(CPU_PROFILING);
52 unsigned int year, mon, day, hour, min, sec;
54 /* FIX by dqg : Set to zero for platforms that don't have tod */
55 /* without this time is undefined and can overflow time_t, causing */
56 /* very strange errors */
60 platform_gettod (&year, &mon, &day, &hour, &min, &sec);
62 if ((year += 1900) < 1970)
64 xtime.tv_sec = mktime(year, mon, day, hour, min, sec);
67 platform_timer_setup(timer_interrupt);