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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> | |
1f83b8f1 | 34 | #include <linux/ptrace.h> |
1394f032 BW |
35 | |
36 | static void enable_sys_timer0() | |
37 | { | |
38 | } | |
39 | static void disable_sys_timer0() | |
40 | { | |
41 | } | |
42 | ||
43 | static irqreturn_t sys_timer0_int_handler(int irq, void *dev_id, | |
44 | struct pt_regs *regs) | |
45 | { | |
46 | oprofile_add_sample(regs, 0); | |
47 | return IRQ_HANDLED; | |
48 | } | |
49 | ||
50 | static int sys_timer0_start(void) | |
51 | { | |
52 | enable_sys_timer0(); | |
53 | return request_irq(IVG11, sys_timer0_int_handler, 0, "sys_timer0", NULL); | |
54 | } | |
55 | ||
56 | static void sys_timer0_stop(void) | |
57 | { | |
58 | disable_sys_timer(); | |
59 | } | |
60 | ||
61 | int __init sys_timer0_init(struct oprofile_operations *ops) | |
62 | { | |
63 | extern int nmi_active; | |
64 | ||
65 | if (nmi_active <= 0) | |
66 | return -ENODEV; | |
67 | ||
68 | ops->start = timer_start; | |
69 | ops->stop = timer_stop; | |
70 | ops->cpu_type = "timer"; | |
71 | printk(KERN_INFO "oprofile: using NMI timer interrupt.\n"); | |
72 | return 0; | |
73 | } |