75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2002 by Björn Stenberg
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include "tick.h"
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#include "general.h"
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#include "panic.h"
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/****************************************************************************
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* Timer tick
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*****************************************************************************/
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/* List of tick tasks - final element always NULL for termination */
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void (*tick_funcs[MAX_NUM_TICK_TASKS+1])(void);
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#if !defined(CPU_PP) || !defined(BOOTLOADER) || \
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defined(HAVE_BOOTLOADER_USB_MODE)
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volatile long current_tick SHAREDDATA_ATTR = 0;
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#endif
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/* - Timer initialization and interrupt handler is defined at
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* the target level: tick_start() is implemented in the target tree */
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int tick_add_task(void (*f)(void))
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{
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int oldlevel = disable_irq_save();
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void **arr = (void **)tick_funcs;
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void **p = find_array_ptr(arr, f);
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/* Add a task if there is room */
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if(p - arr < MAX_NUM_TICK_TASKS)
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{
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*p = f; /* If already in list, no problem. */
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}
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else
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{
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panicf("Error! tick_add_task(): out of tasks");
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}
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restore_irq(oldlevel);
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return 0;
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}
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int tick_remove_task(void (*f)(void))
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{
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int oldlevel = disable_irq_save();
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int rc = remove_array_ptr((void **)tick_funcs, f);
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restore_irq(oldlevel);
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return rc;
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}
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void init_tick(void)
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{
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tick_start(1000/HZ);
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}
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