firmware/export/timer.h

   1 /***************************************************************************
   2 *             __________               __   ___.
   3 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7 *                     \/            \/     \/    \/            \/
   8 * $Id$
   9 *
  10 * Copyright (C) 2005 Jens Arnold
  11 *
  12 * This program is free software; you can redistribute it and/or
  13 * modify it under the terms of the GNU General Public License
  14 * as published by the Free Software Foundation; either version 2
  15 * of the License, or (at your option) any later version.
  16 *
  17 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18 * KIND, either express or implied.
  19 *
  20 ****************************************************************************/
  21
  22 #ifndef __TIMER_H__
  23 #define __TIMER_H__
  24
  25 #include <stdbool.h>
  26 #include "config.h"
  27
  28 #if defined(CPU_PP)
  29  /* Portalplayer chips use a microsecond timer. */
  30  #define TIMER_FREQ 1000000
  31 #elif defined(CPU_COLDFIRE)
  32  /* timer is based on busclk == cpuclk/2 */
  33  #define TIMER_FREQ (CPU_FREQ/2)
  34 #elif CONFIG_CPU == PNX0101
  35  #define TIMER_FREQ 3000000
  36 #elif CONFIG_CPU == S3C2440 || CONFIG_CPU == DM320 || CONFIG_CPU == TCC7801 \
  37       || defined(CPU_TCC77X) || CONFIG_CPU == AS3525
  38  #include "timer-target.h"
  39 #elif defined(SIMULATOR)
  40  #define TIMER_FREQ 1000000
  41 #else
  42  #define TIMER_FREQ CPU_FREQ
  43 #endif
  44 bool timer_register(int reg_prio, void (*unregister_callback)(void),
  45                     long cycles, int int_prio, void (*timer_callback)(void)
  46                     IF_COP(,int core));
  47 bool timer_set_period(long cycles);
  48 #ifdef CPU_COLDFIRE
  49 void timers_adjust_prescale(int multiplier, bool enable_irq);
  50 #endif
  51 void timer_unregister(void);
  52
  53 /* For target-specific interface use */
  54 extern void (*pfn_timer)(void);
  55 extern void (*pfn_unregister)(void);
  56
  57 #endif /* __TIMER_H__ */