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/* ckinit.c
*
* Clock device driver for Lattice Mico32 (lm32).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* COPYRIGHT (c) Yann Sionneau <yann.sionneau@telecom-sudparis.eu> (GSoC 2010)
* Telecom SudParis
*/
#include <bsp.h>
#include <bsp/irq-generic.h>
#include "../include/system_conf.h"
#include "clock.h"
#include "bspopts.h"
#if ON_SIMULATOR
#define CLOCK_DRIVER_USE_FAST_IDLE
#endif
#define Clock_driver_support_at_tick() \
do { \
lm32_interrupt_ack(1 << MM_IRQ_TIMER0); \
} while (0)
#define Clock_driver_support_install_isr(_new, _old ) \
do { \
rtems_interrupt_catch(_new, MM_IRQ_TIMER0, &_old); \
} while (0)
void Clock_driver_support_initialize_hardware(void)
{
MM_WRITE(MM_TIMER0_COMPARE,
(MM_READ(MM_FREQUENCY)/(1000000/rtems_configuration_get_microseconds_per_tick())));
MM_WRITE(MM_TIMER0_COUNTER, 0);
MM_WRITE(MM_TIMER0_CONTROL, TIMER_ENABLE | TIMER_AUTORESTART);
bsp_interrupt_vector_enable(MM_IRQ_TIMER0);
}
void Clock_driver_support_shutdown_hardware(void)
{
bsp_interrupt_vector_disable(MM_IRQ_TIMER0);
MM_WRITE(MM_TIMER0_CONTROL, 0);
}
#include "../../../shared/clockdrv_shell.h"
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