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-rw-r--r--arch/v850/kernel/time.c106
1 files changed, 0 insertions, 106 deletions
diff --git a/arch/v850/kernel/time.c b/arch/v850/kernel/time.c
deleted file mode 100644
index d810c93fe665..000000000000
--- a/arch/v850/kernel/time.c
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1/*
2 * linux/arch/v850/kernel/time.c -- Arch-dependent timer functions
3 *
4 * Copyright (C) 1991, 1992, 1995, 2001, 2002 Linus Torvalds
5 *
6 * This file contains the v850-specific time handling details.
7 * Most of the stuff is located in the machine specific files.
8 *
9 * 1997-09-10 Updated NTP code according to technical memorandum Jan '96
10 * "A Kernel Model for Precision Timekeeping" by Dave Mills
11 */
12
13#include <linux/errno.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/param.h>
17#include <linux/string.h>
18#include <linux/mm.h>
19#include <linux/interrupt.h>
20#include <linux/time.h>
21#include <linux/timex.h>
22#include <linux/profile.h>
23
24#include <asm/io.h>
25
26#include "mach.h"
27
28#define TICK_SIZE (tick_nsec / 1000)
29
30/*
31 * timer_interrupt() needs to keep up the real-time clock,
32 * as well as call the "do_timer()" routine every clocktick
33 */
34static irqreturn_t timer_interrupt (int irq, void *dummy, struct pt_regs *regs)
35{
36#if 0
37 /* last time the cmos clock got updated */
38 static long last_rtc_update=0;
39#endif
40
41 /* may need to kick the hardware timer */
42 if (mach_tick)
43 mach_tick ();
44
45 do_timer (1);
46#ifndef CONFIG_SMP
47 update_process_times(user_mode(regs));
48#endif
49 profile_tick(CPU_PROFILING, regs);
50#if 0
51 /*
52 * If we have an externally synchronized Linux clock, then update
53 * CMOS clock accordingly every ~11 minutes. Set_rtc_mmss() has to be
54 * called as close as possible to 500 ms before the new second starts.
55 */
56 if (ntp_synced() &&
57 xtime.tv_sec > last_rtc_update + 660 &&
58 (xtime.tv_nsec / 1000) >= 500000 - ((unsigned) TICK_SIZE) / 2 &&
59 (xtime.tv_nsec / 1000) <= 500000 + ((unsigned) TICK_SIZE) / 2) {
60 if (set_rtc_mmss (xtime.tv_sec) == 0)
61 last_rtc_update = xtime.tv_sec;
62 else
63 last_rtc_update = xtime.tv_sec - 600; /* do it again in 60 s */
64 }
65#ifdef CONFIG_HEARTBEAT
66 /* use power LED as a heartbeat instead -- much more useful
67 for debugging -- based on the version for PReP by Cort */
68 /* acts like an actual heart beat -- ie thump-thump-pause... */
69 if (mach_heartbeat) {
70 static unsigned cnt = 0, period = 0, dist = 0;
71
72 if (cnt == 0 || cnt == dist)
73 mach_heartbeat ( 1 );
74 else if (cnt == 7 || cnt == dist+7)
75 mach_heartbeat ( 0 );
76
77 if (++cnt > period) {
78 cnt = 0;
79 /* The hyperbolic function below modifies the heartbeat period
80 * length in dependency of the current (5min) load. It goes
81 * through the points f(0)=126, f(1)=86, f(5)=51,
82 * f(inf)->30. */
83 period = ((672<<FSHIFT)/(5*avenrun[0]+(7<<FSHIFT))) + 30;
84 dist = period / 4;
85 }
86 }
87#endif /* CONFIG_HEARTBEAT */
88#endif /* 0 */
89
90 return IRQ_HANDLED;
91}
92
93static int timer_dev_id;
94static struct irqaction timer_irqaction = {
95 .handler = timer_interrupt,
96 .flags = IRQF_DISABLED,
97 .mask = CPU_MASK_NONE,
98 .name = "timer",
99 .dev_id = &timer_dev_id,
100};
101
102void time_init (void)
103{
104 mach_gettimeofday (&xtime);
105 mach_sched_init (&timer_irqaction);
106}