oprofile: Adding switch counter to oprofile statistic variables
[linux-2.6.git] / drivers / oprofile / timer_int.c
1 /**
2  * @file timer_int.c
3  *
4  * @remark Copyright 2002 OProfile authors
5  * @remark Read the file COPYING
6  *
7  * @author John Levon <levon@movementarian.org>
8  */
9
10 #include <linux/kernel.h>
11 #include <linux/notifier.h>
12 #include <linux/smp.h>
13 #include <linux/oprofile.h>
14 #include <linux/profile.h>
15 #include <linux/init.h>
16 #include <asm/ptrace.h>
17
18 #include "oprof.h"
19
20 static int timer_notify(struct pt_regs *regs)
21 {
22         oprofile_add_sample(regs, 0);
23         return 0;
24 }
25
26 static int timer_start(void)
27 {
28         return register_timer_hook(timer_notify);
29 }
30
31
32 static void timer_stop(void)
33 {
34         unregister_timer_hook(timer_notify);
35 }
36
37
38 void __init oprofile_timer_init(struct oprofile_operations *ops)
39 {
40         ops->create_files = NULL;
41         ops->setup = NULL;
42         ops->shutdown = NULL;
43         ops->start = timer_start;
44         ops->stop = timer_stop;
45         ops->cpu_type = "timer";
46 }