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/*
* linux/include/asm-arm/arch-epxa10db/time.h
*
* Copyright (C) 2001 Altera Corporation
*
* 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 program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/config.h>
#include <asm/system.h>
#include <asm/leds.h>
#include <asm/arch/hardware.h>
#define TIMER00_TYPE (volatile unsigned int*)
#include <asm/arch/timer00.h>
/*
* IRQ handler for the timer
*/
static void excalibur_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
// ...clear the interrupt
*TIMER0_CR(IO_ADDRESS(EXC_TIMER00_BASE))|=TIMER0_CR_CI_MSK;
do_leds();
do_timer(regs);
do_profile(regs);
}
/*
* Set up timer interrupt, and return the current time in seconds.
*/
extern __inline__ void setup_timer(void)
{
timer_irq.handler = excalibur_timer_interrupt;
/*
* Make irqs happen for the system timer
*/
setup_arm_irq(IRQ_TIMER0, &timer_irq);
/* Start the timer */
*TIMER0_LIMIT(IO_ADDRESS(EXC_TIMER00_BASE))=(unsigned int)(EXC_AHB2_CLK_FREQUENCY/50);
*TIMER0_PRESCALE(IO_ADDRESS(EXC_TIMER00_BASE))=1;
*TIMER0_CR(IO_ADDRESS(EXC_TIMER00_BASE))=TIMER0_CR_IE_MSK | TIMER0_CR_S_MSK;
}
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