blob: c90332de582b9a213c5aa91a0557c3ce93179567 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/**
2 * @file init.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/oprofile.h>
11#include <linux/init.h>
12#include <linux/errno.h>
13
14/* We support CPUs that have performance counters like the Pentium Pro
15 * with the NMI mode driver.
16 */
17
18extern int nmi_init(struct oprofile_operations * ops);
19extern int nmi_timer_init(struct oprofile_operations * ops);
20extern void nmi_exit(void);
21extern void x86_backtrace(struct pt_regs * const regs, unsigned int depth);
22
23
24int __init oprofile_arch_init(struct oprofile_operations * ops)
25{
26 int ret;
27
28 ret = -ENODEV;
29
30#ifdef CONFIG_X86_LOCAL_APIC
31 ret = nmi_init(ops);
32#endif
33#ifdef CONFIG_X86_IO_APIC
34 if (ret < 0)
35 ret = nmi_timer_init(ops);
36#endif
37 ops->backtrace = x86_backtrace;
38
39 return ret;
40}
41
42
43void oprofile_arch_exit(void)
44{
45#ifdef CONFIG_X86_LOCAL_APIC
46 nmi_exit();
47#endif
48}