projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
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> | |
| d717ca84 PC |
13 | |
| 14 | /* | |
| 15 | * We support CPUs that have performance counters like the Pentium Pro | |
| 1da177e4 LT |
16 | * with the NMI mode driver. |
| 17 | */ | |
| d717ca84 PC |
18 | |
| 19 | extern int op_nmi_init(struct oprofile_operations *ops); | |
| 20 | extern int op_nmi_timer_init(struct oprofile_operations *ops); | |
| 96d0821c | 21 | extern void op_nmi_exit(void); |
| 1da177e4 LT |
22 | extern void x86_backtrace(struct pt_regs * const regs, unsigned int depth); |
| 23 | ||
| 97f7f818 | 24 | static int nmi_timer; |
| 1da177e4 | 25 | |
| d717ca84 | 26 | int __init oprofile_arch_init(struct oprofile_operations *ops) |
| 1da177e4 LT |
27 | { |
| 28 | int ret; | |
| 29 | ||
| 30 | ret = -ENODEV; | |
| 31 | ||
| 32 | #ifdef CONFIG_X86_LOCAL_APIC | |
| 96d0821c | 33 | ret = op_nmi_init(ops); |
| 1da177e4 | 34 | #endif |
| 97f7f818 | 35 | nmi_timer = (ret != 0); |
| 1da177e4 | 36 | #ifdef CONFIG_X86_IO_APIC |
| 97f7f818 | 37 | if (nmi_timer) |
| 96d0821c | 38 | ret = op_nmi_timer_init(ops); |
| 1da177e4 LT |
39 | #endif |
| 40 | ops->backtrace = x86_backtrace; | |
| 41 | ||
| 42 | return ret; | |
| 43 | } | |
| 44 | ||
| 45 | ||
| 46 | void oprofile_arch_exit(void) | |
| 47 | { | |
| 48 | #ifdef CONFIG_X86_LOCAL_APIC | |
| 97f7f818 RR |
49 | if (!nmi_timer) |
| 50 | op_nmi_exit(); | |
| 1da177e4 LT |
51 | #endif |
| 52 | } |