clem_timer.c

#include "clem_device.h"
#include "clem_mmio_defs.h"

void clem_timer_reset(struct ClemensDeviceTimer *timer) { timer->flags = 0; }

void clem_timer_sync(struct ClemensDeviceTimer *timer, uint32_t delta_us) {
    timer->irq_1sec_us += delta_us;
    timer->irq_qtrsec_us += delta_us;

    while (timer->irq_1sec_us >= CLEM_MEGA2_TIMER_1SEC_US) {
        timer->irq_1sec_us -= CLEM_MEGA2_TIMER_1SEC_US;
        if (timer->flags & CLEM_MMIO_TIMER_1SEC_ENABLED) {
            timer->irq_line |= CLEM_IRQ_TIMER_RTC_1SEC;
        }
    }
    while (timer->irq_qtrsec_us >= CLEM_MEGA2_TIMER_QSEC_US) {
        timer->irq_qtrsec_us -= CLEM_MEGA2_TIMER_QSEC_US;
        if (timer->flags & CLEM_MMIO_TIMER_QSEC_ENABLED) {
            timer->irq_line |= CLEM_IRQ_TIMER_QSEC;
            timer->flags |= CLEM_MMIO_TIMER_QSEC_IRQ;
        }
    }
}