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> |
Paolo Ciarrocchi | d717ca8 | 2008-02-22 23:09:50 +0100 | [diff] [blame] | 13 | |
| 14 | /* |
| 15 | * We support CPUs that have performance counters like the Pentium Pro |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | * with the NMI mode driver. |
| 17 | */ |
Paolo Ciarrocchi | d717ca8 | 2008-02-22 23:09:50 +0100 | [diff] [blame] | 18 | |
| 19 | extern int op_nmi_init(struct oprofile_operations *ops); |
| 20 | extern int op_nmi_timer_init(struct oprofile_operations *ops); |
David Gibson | 96d0821 | 2005-09-06 15:17:26 -0700 | [diff] [blame] | 21 | extern void op_nmi_exit(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | extern void x86_backtrace(struct pt_regs * const regs, unsigned int depth); |
| 23 | |
| 24 | |
Paolo Ciarrocchi | d717ca8 | 2008-02-22 23:09:50 +0100 | [diff] [blame] | 25 | int __init oprofile_arch_init(struct oprofile_operations *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | { |
| 27 | int ret; |
| 28 | |
| 29 | ret = -ENODEV; |
| 30 | |
| 31 | #ifdef CONFIG_X86_LOCAL_APIC |
David Gibson | 96d0821 | 2005-09-06 15:17:26 -0700 | [diff] [blame] | 32 | ret = op_nmi_init(ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #endif |
| 34 | #ifdef CONFIG_X86_IO_APIC |
| 35 | if (ret < 0) |
David Gibson | 96d0821 | 2005-09-06 15:17:26 -0700 | [diff] [blame] | 36 | ret = op_nmi_timer_init(ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #endif |
| 38 | ops->backtrace = x86_backtrace; |
| 39 | |
| 40 | return ret; |
| 41 | } |
| 42 | |
| 43 | |
| 44 | void oprofile_arch_exit(void) |
| 45 | { |
| 46 | #ifdef CONFIG_X86_LOCAL_APIC |
David Gibson | 96d0821 | 2005-09-06 15:17:26 -0700 | [diff] [blame] | 47 | op_nmi_exit(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #endif |
| 49 | } |