Commit | Line | Data |
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1da177e4 LT |
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 | ||
1da177e4 LT |
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> | |
81d423e2 | 30 | #include <asm/timer.h> |
1da177e4 LT |
31 | |
32 | #define TICK_SIZE (tick_nsec / 1000) | |
33 | ||
81d423e2 | 34 | void h8300_timer_tick(void) |
1da177e4 | 35 | { |
81d423e2 YS |
36 | if (current->pid) |
37 | profile_tick(CPU_PROFILING); | |
daad8b58 | 38 | xtime_update(1); |
81d423e2 | 39 | update_process_times(user_mode(get_irq_regs())); |
1da177e4 LT |
40 | } |
41 | ||
12833c1e | 42 | void read_persistent_clock(struct timespec *ts) |
1da177e4 LT |
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 */ | |
5e71c605 | 48 | /* very strange errors */ |
1da177e4 LT |
49 | year = 1980; |
50 | mon = day = 1; | |
51 | hour = min = sec = 0; | |
81d423e2 YS |
52 | #ifdef CONFIG_H8300_GETTOD |
53 | h8300_gettod (&year, &mon, &day, &hour, &min, &sec); | |
54 | #endif | |
1da177e4 LT |
55 | if ((year += 1900) < 1970) |
56 | year += 100; | |
12833c1e JS |
57 | ts->tv_sec = mktime(year, mon, day, hour, min, sec); |
58 | ts->tv_nsec = 0; | |
59 | } | |
60 | ||
61 | void __init time_init(void) | |
62 | { | |
1da177e4 | 63 | |
81d423e2 | 64 | h8300_timer_setup(); |
1da177e4 | 65 | } |