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
h8300_timer_tick(void)34 void 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
read_persistent_clock(struct timespec * ts)42 void 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
time_init(void)61 void __init time_init(void)
62 {
63
64 h8300_timer_setup();
65 }
66