Logo Search packages:      
Sourcecode: linux version File versions

profile.c

/* MN10300 Profiling setup
 *
 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public Licence
 * as published by the Free Software Foundation; either version
 * 2 of the Licence, or (at your option) any later version.
 */

/*
 * initialise the profiling if enabled
 * - using with gdbstub will give anomalous results
 * - can't be used with gdbstub if running at IRQ priority 0
 */
static __init int profile_init(void)
{
      u16 tmp;

      if (!prof_buffer)
            return 0;

      /* use timer 11 to drive the profiling interrupts */
      set_intr_stub(EXCEP_IRQ_LEVEL0, profile_handler);

      /* set IRQ priority at which to run */
      set_intr_level(TM11IRQ, GxICR_LEVEL_0);

      /* set up timer 11
       * - source: (IOCLK 33MHz)*2 = 66MHz
       * - frequency: (33330000*2) / 8 / 20625 = 202Hz
       */
      TM11BR = 20625 - 1;
      TM11MD = TM8MD_SRC_IOCLK_8;
      TM11MD |= TM8MD_INIT_COUNTER;
      TM11MD &= ~TM8MD_INIT_COUNTER;
      TM11MD |= TM8MD_COUNT_ENABLE;

      TM11ICR |= GxICR_ENABLE;
      tmp = TM11ICR;

      printk(KERN_INFO "Profiling initiated on timer 11, priority 0, %uHz\n",
             mn10300_ioclk / 8 / (TM11BR + 1));
      printk(KERN_INFO "Profile histogram stored %p-%p\n",
             prof_buffer, (u8 *)(prof_buffer + prof_len) - 1);

      return 0;
}

__initcall(profile_init);

Generated by  Doxygen 1.6.0   Back to index