Linux Kernel  3.7.1
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time.c
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1 /*
2  * linux/arch/cris/kernel/time.c
3  *
4  * Copyright (C) 1991, 1992, 1995 Linus Torvalds
5  * Copyright (C) 1999, 2000, 2001 Axis Communications AB
6  *
7  * 1994-07-02 Alan Modra
8  * fixed set_rtc_mmss, fixed time.year for >= 2000, new mktime
9  * 1995-03-26 Markus Kuhn
10  * fixed 500 ms bug at call to set_rtc_mmss, fixed DS12887
11  * precision CMOS clock update
12  * 1996-05-03 Ingo Molnar
13  * fixed time warps in do_[slow|fast]_gettimeoffset()
14  * 1997-09-10 Updated NTP code according to technical memorandum Jan '96
15  * "A Kernel Model for Precision Timekeeping" by Dave Mills
16  *
17  * Linux/CRIS specific code:
18  *
19  * Authors: Bjorn Wesen
20  * Johan Adolfsson
21  *
22  */
23 
24 #include <linux/errno.h>
25 #include <linux/module.h>
26 #include <linux/param.h>
27 #include <linux/jiffies.h>
28 #include <linux/bcd.h>
29 #include <linux/timex.h>
30 #include <linux/init.h>
31 #include <linux/profile.h>
32 #include <linux/sched.h> /* just for sched_clock() - funny that */
33 
34 
35 #define D(x)
36 
37 #define TICK_SIZE tick
38 
39 extern unsigned long loops_per_jiffy; /* init/main.c */
40 unsigned long loops_per_usec;
41 
42 
43 #ifdef CONFIG_ARCH_USES_GETTIMEOFFSET
44 extern unsigned long do_slow_gettimeoffset(void);
45 static unsigned long (*do_gettimeoffset)(void) = do_slow_gettimeoffset;
46 
48 {
49  return do_gettimeoffset() * 1000;
50 }
51 #endif
52 
53 int set_rtc_mmss(unsigned long nowtime)
54 {
55  D(printk(KERN_DEBUG "set_rtc_mmss(%lu)\n", nowtime));
56  return 0;
57 }
58 
59 /* grab the time from the RTC chip */
60 unsigned long get_cmos_time(void)
61 {
62  return 0;
63 }
64 
65 
67 {
68  return set_rtc_mmss(now.tv_sec);
69 }
70 
72 {
73  ts->tv_sec = 0;
74  ts->tv_nsec = 0;
75 }
76 
77 
78 extern void cris_profile_sample(struct pt_regs* regs);
79 
80 void
82 {
83 
84 #ifdef CONFIG_SYSTEM_PROFILER
85  cris_profile_sample(regs);
86 #endif
87 
88 #ifdef CONFIG_PROFILING
90 #endif
91 }
92 
93 unsigned long long sched_clock(void)
94 {
95  return (unsigned long long)jiffies * (NSEC_PER_SEC / HZ) +
97 }
98 
99 static int
100 __init init_udelay(void)
101 {
102  loops_per_usec = (loops_per_jiffy * HZ) / 1000000;
103  return 0;
104 }
105 
106 __initcall(init_udelay);