blob: cdfe4c54decac05e4943a00e27803f78898b6419 [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>
Paolo Ciarrocchid717ca82008-02-22 23:09:50 +010013
14/*
15 * We support CPUs that have performance counters like the Pentium Pro
Linus Torvalds1da177e2005-04-16 15:20:36 -070016 * with the NMI mode driver.
17 */
Paolo Ciarrocchid717ca82008-02-22 23:09:50 +010018
19extern int op_nmi_init(struct oprofile_operations *ops);
20extern int op_nmi_timer_init(struct oprofile_operations *ops);
David Gibson96d08212005-09-06 15:17:26 -070021extern void op_nmi_exit(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070022extern void x86_backtrace(struct pt_regs * const regs, unsigned int depth);
23
24
Paolo Ciarrocchid717ca82008-02-22 23:09:50 +010025int __init oprofile_arch_init(struct oprofile_operations *ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -070026{
27 int ret;
28
29 ret = -ENODEV;
30
31#ifdef CONFIG_X86_LOCAL_APIC
David Gibson96d08212005-09-06 15:17:26 -070032 ret = op_nmi_init(ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#endif
34#ifdef CONFIG_X86_IO_APIC
35 if (ret < 0)
David Gibson96d08212005-09-06 15:17:26 -070036 ret = op_nmi_timer_init(ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#endif
38 ops->backtrace = x86_backtrace;
39
40 return ret;
41}
42
43
44void oprofile_arch_exit(void)
45{
46#ifdef CONFIG_X86_LOCAL_APIC
David Gibson96d08212005-09-06 15:17:26 -070047 op_nmi_exit();
Linus Torvalds1da177e2005-04-16 15:20:36 -070048#endif
49}