EMK/emk
1
0
Fork 0
Code Issues Activity

feat/kernel: im stuck in the apic jungle and need help

Browse source
This commit is contained in:
Kevin Alavik 2025-06-01 13:52:33 +02:00
parent f81181ea9c
commit 322e95fe98
Signed by: cmpsb
GPG key ID: 10D1CC0526FDC6D7
10 changed files with 240 additions and 71 deletions
Download patch file Download diff file Expand all files Collapse all files

32
kernel/src/dev/pit.c Normal file
View file

@ -0,0 +1,32 @@
/* EMK 1.0 Copyright (c) 2025 Piraterna */
#include <dev/pit.h>
#include <arch/io.h>
#include <sys/apic/lapic.h>
#include <sys/apic/ioapic.h>
#include <util/log.h>
#define PIT_VECTOR 32
void (*pit_callback)(struct register_ctx *ctx) = NULL;
void pit_handler(struct register_ctx *frame)
{
if (pit_callback)
pit_callback(frame);
lapic_eoi();
}
void pit_init(idt_intr_handler handler)
{
if (handler)
pit_callback = handler;
outb(0x43, 0x36);
uint16_t divisor = 5966;
outb(0x40, divisor & 0xFF);
outb(0x40, (divisor >> 8) & 0xFF);
ioapic_map(0, PIT_VECTOR, pit_handler, 0);
ioapic_unmask(0);
}