Syncboot/arch/i386/sys_clock.c

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/************************
*** Team Kitty, 2019 ***
*** Sync ***
***********************/
/* This file provides an interface to
* the hardware timer / RTC. Not much
* more to be said about it. */
#include <kernel/utils.h>
#include <kernel.h>
#include <kernel/serial.h>
#include <kernel/descriptor_tables.h>
size_t timer_ticks = 0;
size_t flag = 0;
void timer_handler(struct int_frame* r) {
gdb_end();
timer_ticks++;
if(timer_ticks % 18 == 0) {
if(++flag % 2 == 0) {
serial_print(0x3F8, "Tick.");
} else {
serial_print(0x3F8, "Tock.");
}
}
if(timer_ticks > 18)
timer_ticks = 0;
}
void timer_install() {
irq_install_handler(0, &timer_handler);
}