firmware/target/arm/kernel-pp.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2002 by Björn Stenberg
  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 #include "config.h"
  22 #include "system.h"
  23 #include "kernel.h"
  24
  25 #ifndef BOOTLOADER
  26 void TIMER1(void)
  27 {
  28     /* Run through the list of tick tasks (using main core) */
  29     TIMER1_VAL; /* Read value to ack IRQ */
  30
  31     /* Run through the list of tick tasks using main CPU core -
  32        wake up the COP through its control interface to provide pulse */
  33     call_tick_tasks();
  34
  35 #if NUM_CORES > 1
  36     /* Pulse the COP */
  37     core_wake(COP);
  38 #endif /* NUM_CORES */
  39 }
  40 #endif
  41
  42 /* Must be last function called init kernel/thread initialization */
  43 void tick_start(unsigned int interval_in_ms)
  44 {
  45 #ifndef BOOTLOADER
  46     TIMER1_CFG = 0x0;
  47     TIMER1_VAL;
  48     /* enable timer */
  49     TIMER1_CFG = 0xc0000000 | (interval_in_ms*1000 - 1);
  50     /* unmask interrupt source */
  51     CPU_INT_EN = TIMER1_MASK;
  52 #else
  53     /* We don't enable interrupts in the bootloader */
  54     (void)interval_in_ms;
  55 #endif
  56 }