| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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 | } |