1/*
 2 *  linux/arch/h8300/kernel/time.c
 3 *
 4 *  Yoshinori Sato <ysato@users.sourceforge.jp>
 5 *
 6 *  Copied/hacked from:
 7 *
 8 *  linux/arch/m68k/kernel/time.c
 9 *
10 *  Copyright (C) 1991, 1992, 1995  Linus Torvalds
11 *
12 * This file contains the m68k-specific time handling details.
13 * Most of the stuff is located in the machine specific files.
14 *
15 * 1997-09-10	Updated NTP code according to technical memorandum Jan '96
16 *		"A Kernel Model for Precision Timekeeping" by Dave Mills
17 */
18
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>
25#include <linux/mm.h>
26#include <linux/timex.h>
27#include <linux/profile.h>
28
29#include <asm/io.h>
30#include <asm/irq_regs.h>
31#include <asm/timer.h>
32
33#define	TICK_SIZE (tick_nsec / 1000)
34
35void h8300_timer_tick(void)
36{
37	if (current->pid)
38		profile_tick(CPU_PROFILING);
39	xtime_update(1);
40	update_process_times(user_mode(get_irq_regs()));
41}
42
43void read_persistent_clock(struct timespec *ts)
44{
45	unsigned int year, mon, day, hour, min, sec;
46
47	/* FIX by dqg : Set to zero for platforms that don't have tod */
48	/* without this time is undefined and can overflow time_t, causing  */
49	/* very strange errors */
50	year = 1980;
51	mon = day = 1;
52	hour = min = sec = 0;
53#ifdef CONFIG_H8300_GETTOD
54	h8300_gettod (&year, &mon, &day, &hour, &min, &sec);
55#endif
56	if ((year += 1900) < 1970)
57		year += 100;
58	ts->tv_sec = mktime(year, mon, day, hour, min, sec);
59	ts->tv_nsec = 0;
60}
61
62void __init time_init(void)
63{
64
65	h8300_timer_setup();
66}