51 lines
938 B
C
51 lines
938 B
C
/**
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* @file timer_int.c
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*
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* @remark Copyright 2002 OProfile authors
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* @remark Read the file COPYING
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*
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* @author John Levon <levon@movementarian.org>
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*/
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#include <linux/kernel.h>
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#include <linux/notifier.h>
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#include <linux/smp.h>
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#include <linux/oprofile.h>
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#include <linux/profile.h>
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#include <linux/init.h>
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#include <asm/ptrace.h>
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static int timer_notify(struct pt_regs *regs)
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{
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int cpu = smp_processor_id();
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unsigned long eip = profile_pc(regs);
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oprofile_add_sample(eip, !user_mode(regs), 0, cpu);
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return 0;
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}
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static int timer_start(void)
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{
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return register_timer_hook(timer_notify);
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}
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static void timer_stop(void)
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{
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unregister_timer_hook(timer_notify);
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}
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static struct oprofile_operations timer_ops = {
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.start = timer_start,
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.stop = timer_stop,
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.cpu_type = "timer"
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};
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void __init timer_init(struct oprofile_operations ** ops)
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{
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*ops = &timer_ops;
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printk(KERN_INFO "oprofile: using timer interrupt.\n");
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}
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