diff options
author | Glenn Elliott <gelliott@cs.unc.edu> | 2012-03-04 19:47:13 -0500 |
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committer | Glenn Elliott <gelliott@cs.unc.edu> | 2012-03-04 19:47:13 -0500 |
commit | c71c03bda1e86c9d5198c5d83f712e695c4f2a1e (patch) | |
tree | ecb166cb3e2b7e2adb3b5e292245fefd23381ac8 /arch/m68k/kernel/time.c | |
parent | ea53c912f8a86a8567697115b6a0d8152beee5c8 (diff) | |
parent | 6a00f206debf8a5c8899055726ad127dbeeed098 (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.c | 119 |
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 | |||
31 | static 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 | */ | ||
42 | static 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 | |||
76 | void 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 | |||
92 | void __init time_init(void) | ||
93 | { | ||
94 | mach_sched_init(timer_interrupt); | ||
95 | } | ||
96 | |||
97 | u32 arch_gettimeoffset(void) | ||
98 | { | ||
99 | return mach_gettimeoffset() * 1000; | ||
100 | } | ||
101 | |||
102 | static 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 | |||
116 | module_init(rtc_init); | ||