LXR linux/arch/x86/oprofile/init.c

   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/*
  15 * We support CPUs that have performance counters like the Pentium Pro
  16 * with the NMI mode driver.
  17 */
  18
  19extern int op_nmi_init(struct oprofile_operations *ops);
  20extern int op_nmi_timer_init(struct oprofile_operations *ops);
  21extern void op_nmi_exit(void);
  22extern void x86_backtrace(struct pt_regs * const regs, unsigned int depth);
  23
  24
  25int __init oprofile_arch_init(struct oprofile_operations *ops)
  26{
  27        int ret;
  28
  29        ret = -ENODEV;
  30
  31#ifdef CONFIG_X86_LOCAL_APIC
  32        ret = op_nmi_init(ops);
  33#endif
  34#ifdef CONFIG_X86_IO_APIC
  35        if (ret < 0)
  36                ret = op_nmi_timer_init(ops);
  37#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
  47        op_nmi_exit();
  48#endif
  49}
  50