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/timer.h>
31
32#define	TICK_SIZE (tick_nsec / 1000)
33
34void h8300_timer_tick(void)
35{
36	if (current->pid)
37		profile_tick(CPU_PROFILING);
38	xtime_update(1);
39	update_process_times(user_mode(get_irq_regs()));
40}
41
42void read_persistent_clock(struct timespec *ts)
43{
44	unsigned int year, mon, day, hour, min, sec;
45
46	/* FIX by dqg : Set to zero for platforms that don't have tod */
47	/* without this time is undefined and can overflow time_t, causing  */
48	/* very strange errors */
49	year = 1980;
50	mon = day = 1;
51	hour = min = sec = 0;
52#ifdef CONFIG_H8300_GETTOD
53	h8300_gettod (&year, &mon, &day, &hour, &min, &sec);
54#endif
55	if ((year += 1900) < 1970)
56		year += 100;
57	ts->tv_sec = mktime(year, mon, day, hour, min, sec);
58	ts->tv_nsec = 0;
59}
60
61void __init time_init(void)
62{
63
64	h8300_timer_setup();
65}
66