1/*
2 * File:         arch/blackfin/oprofile/timer_int.c
3 * Based on:
4 * Author:       Michael Kang
5 *
6 * Created:
7 * Description:
8 *
9 * Modified:
10 *               Copyright 2004-2006 Analog Devices Inc.
11 *
12 * Bugs:         Enter bugs at http://blackfin.uclinux.org/
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, see the file COPYING, or write
26 * to the Free Software Foundation, Inc.,
27 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
28 */
29
30#include <linux/init.h>
31#include <linux/smp.h>
32#include <linux/irq.h>
33#include <linux/oprofile.h>
34
35#include <asm/ptrace.h>
36
37static void enable_sys_timer0()
38{
39}
40static void disable_sys_timer0()
41{
42}
43
44static irqreturn_t sys_timer0_int_handler(int irq, void *dev_id,
45					  struct pt_regs *regs)
46{
47	oprofile_add_sample(regs, 0);
48	return IRQ_HANDLED;
49}
50
51static int sys_timer0_start(void)
52{
53	enable_sys_timer0();
54	return request_irq(IVG11, sys_timer0_int_handler, 0, "sys_timer0", NULL);
55}
56
57static void sys_timer0_stop(void)
58{
59	disable_sys_timer();
60}
61
62int __init sys_timer0_init(struct oprofile_operations *ops)
63{
64	extern int nmi_active;
65
66	if (nmi_active <= 0)
67		return -ENODEV;
68
69	ops->start = timer_start;
70	ops->stop = timer_stop;
71	ops->cpu_type = "timer";
72	printk(KERN_INFO "oprofile: using NMI timer interrupt.\n");
73	return 0;
74}
75