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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 Thom Johansen
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "cpu.h"
#include "system.h"
#include "timer.h"
static long SHAREDBSS_ATTR cycles_new = 0;
void TIMER2(void)
{
TIMER2_VAL; /* ACK interrupt */
if (cycles_new > 0)
{
TIMER2_CFG = 0xc0000000 | (cycles_new - 1);
cycles_new = 0;
}
if (pfn_timer != NULL)
{
cycles_new = -1;
/* "lock" the variable, in case timer_set_period()
* is called within pfn_timer() */
pfn_timer();
cycles_new = 0;
}
}
bool timer_set(long cycles, bool start)
{
if (cycles > 0x20000000 || cycles < 2)
return false;
if (start)
{
if (pfn_unregister != NULL)
{
pfn_unregister();
pfn_unregister = NULL;
}
CPU_INT_DIS = TIMER2_MASK;
COP_INT_DIS = TIMER2_MASK;
}
if (start || (cycles_new == -1)) /* within isr, cycles_new is "locked" */
TIMER2_CFG = 0xc0000000 | (cycles - 1); /* enable timer */
else
cycles_new = cycles;
return true;
}
bool timer_start(IF_COP_VOID(int core))
{
/* unmask interrupt source */
#if NUM_CORES > 1
if (core == COP)
COP_INT_EN = TIMER2_MASK;
else
#endif
CPU_INT_EN = TIMER2_MASK;
return true;
}
void timer_stop(void)
{
TIMER2_CFG = 0; /* stop timer 2 */
CPU_INT_DIS = TIMER2_MASK;
COP_INT_DIS = TIMER2_MASK;
}
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