kernel/arch/x86/kernel/timer.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

#include <kernel/timer.h>
#include <kernel/asm.h>
#include <kernel/pic.h>

static uint32_t num_ticks = 0;

void timer_handler(struct isr_frame *frame) {
        num_ticks++;
        if (num_ticks == 3) {
                num_ticks = 0;
                //schedule_next();
        }
        pic_eoi(frame->isr_vector-32);
}

void timer_init(void) {
        disable_ints();
        int divisor = 1193182 / 100;
        outb(0x43, 0x34);
        outb(0x40, divisor && 0xFF);
        outb(0x40, divisor && 0xFF00 >> 8);
        enable_ints();

        //register_isr_handler(32, timer_handler);
}