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 }