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authorGlenn Elliott <gelliott@cs.unc.edu>2012-03-04 19:47:13 -0500
committerGlenn Elliott <gelliott@cs.unc.edu>2012-03-04 19:47:13 -0500
commitc71c03bda1e86c9d5198c5d83f712e695c4f2a1e (patch)
treeecb166cb3e2b7e2adb3b5e292245fefd23381ac8 /arch/m68k/kernel/time.c
parentea53c912f8a86a8567697115b6a0d8152beee5c8 (diff)
parent6a00f206debf8a5c8899055726ad127dbeeed098 (diff)
Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp
Conflicts: litmus/sched_cedf.c
Diffstat (limited to 'arch/m68k/kernel/time.c')
-rw-r--r--arch/m68k/kernel/time.c119
1 files changed, 4 insertions, 115 deletions
diff --git a/arch/m68k/kernel/time.c b/arch/m68k/kernel/time.c
index 4926b3856c15..a5cf40c26de5 100644
--- a/arch/m68k/kernel/time.c
+++ b/arch/m68k/kernel/time.c
@@ -1,116 +1,5 @@
1/* 1#ifdef CONFIG_MMU
2 * linux/arch/m68k/kernel/time.c 2#include "time_mm.c"
3 * 3#else
4 * Copyright (C) 1991, 1992, 1995 Linus Torvalds 4#include "time_no.c"
5 *
6 * This file contains the m68k-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/module.h>
15#include <linux/sched.h>
16#include <linux/kernel.h>
17#include <linux/param.h>
18#include <linux/string.h>
19#include <linux/mm.h>
20#include <linux/rtc.h>
21#include <linux/platform_device.h>
22
23#include <asm/machdep.h>
24#include <asm/io.h>
25#include <asm/irq_regs.h>
26
27#include <linux/time.h>
28#include <linux/timex.h>
29#include <linux/profile.h>
30
31static inline int set_rtc_mmss(unsigned long nowtime)
32{
33 if (mach_set_clock_mmss)
34 return mach_set_clock_mmss (nowtime);
35 return -1;
36}
37
38/*
39 * timer_interrupt() needs to keep up the real-time clock,
40 * as well as call the "do_timer()" routine every clocktick
41 */
42static irqreturn_t timer_interrupt(int irq, void *dummy)
43{
44 do_timer(1);
45#ifndef CONFIG_SMP
46 update_process_times(user_mode(get_irq_regs()));
47#endif 5#endif
48 profile_tick(CPU_PROFILING);
49
50#ifdef CONFIG_HEARTBEAT
51 /* use power LED as a heartbeat instead -- much more useful
52 for debugging -- based on the version for PReP by Cort */
53 /* acts like an actual heart beat -- ie thump-thump-pause... */
54 if (mach_heartbeat) {
55 static unsigned cnt = 0, period = 0, dist = 0;
56
57 if (cnt == 0 || cnt == dist)
58 mach_heartbeat( 1 );
59 else if (cnt == 7 || cnt == dist+7)
60 mach_heartbeat( 0 );
61
62 if (++cnt > period) {
63 cnt = 0;
64 /* The hyperbolic function below modifies the heartbeat period
65 * length in dependency of the current (5min) load. It goes
66 * through the points f(0)=126, f(1)=86, f(5)=51,
67 * f(inf)->30. */
68 period = ((672<<FSHIFT)/(5*avenrun[0]+(7<<FSHIFT))) + 30;
69 dist = period / 4;
70 }
71 }
72#endif /* CONFIG_HEARTBEAT */
73 return IRQ_HANDLED;
74}
75
76void read_persistent_clock(struct timespec *ts)
77{
78 struct rtc_time time;
79 ts->tv_sec = 0;
80 ts->tv_nsec = 0;
81
82 if (mach_hwclk) {
83 mach_hwclk(0, &time);
84
85 if ((time.tm_year += 1900) < 1970)
86 time.tm_year += 100;
87 ts->tv_sec = mktime(time.tm_year, time.tm_mon, time.tm_mday,
88 time.tm_hour, time.tm_min, time.tm_sec);
89 }
90}
91
92void __init time_init(void)
93{
94 mach_sched_init(timer_interrupt);
95}
96
97u32 arch_gettimeoffset(void)
98{
99 return mach_gettimeoffset() * 1000;
100}
101
102static int __init rtc_init(void)
103{
104 struct platform_device *pdev;
105
106 if (!mach_hwclk)
107 return -ENODEV;
108
109 pdev = platform_device_register_simple("rtc-generic", -1, NULL, 0);
110 if (IS_ERR(pdev))
111 return PTR_ERR(pdev);
112
113 return 0;
114}
115
116module_init(rtc_init);