/*
* Copyright (c) 2019 Jiri Svoboda
* Copyright (c) 2013 Beniamino Galvani
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup kernel_genarch
* @{
*/
/**
* @file
* @brief Broadcom BCM2835 system timer driver.
*/
#include <assert.h>
#include <genarch/drivers/bcm2835/timer.h>
#include <time/clock.h>
void bcm2835_timer_start(bcm2835_timer_t *timer)
{
assert(timer);
/* Clear pending interrupt on channel 1 */
timer->cs |= BCM2835_TIMER_CS_M1;
/* Initialize compare value for match channel 1 */
timer->c1 = timer->clo + (BCM2835_CLOCK_FREQ / HZ);
}
void bcm2835_timer_irq_ack(bcm2835_timer_t *timer)
{
assert(timer);
/* Clear pending interrupt on channel 1 */
timer->cs |= BCM2835_TIMER_CS_M1;
/* Reprogram compare value for match channel 1 */
timer->c1 = timer->clo + (BCM2835_CLOCK_FREQ / HZ);
}
/**
* @}
*/