1 /**
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
18 extern int nmi_init(struct oprofile_operations * ops);
19 extern int nmi_timer_init(struct oprofile_operations * ops);
20 extern void nmi_exit(void);
21 extern void x86_backtrace(struct pt_regs * const regs, unsigned int depth);
22
23
24 int __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
43 void oprofile_arch_exit(void)
44 {
45 #ifdef CONFIG_X86_LOCAL_APIC
46 nmi_exit();
47 #endif
48 }
49
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