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Modularize interrupt handlers, split up scheduler and PIT interrupt handlers

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This commit is contained in:
Kamil Kowalczyk
2025-11-17 01:08:23 +01:00
parent f2b7c5da57
commit 77b5a4a153
6 changed files with 70 additions and 25 deletions
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18
kernel/intr/pit.c
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@ -1,6 +1,7 @@
#include <stdint.h>
#include "intr/pit.h"
#include "io/io.h"
#include "intr/intr.h"
#define PIT_COUNTER0 0x40
#define PIT_CMD 0x43
@ -25,15 +26,22 @@
volatile uint32_t PIT_TICKS;
void intr_pit_wait(uint32_t ms) {
uint32_t now = PIT_TICKS;
while (PIT_TICKS - now < ms);
}
int intr_pit_intr(IntrStackFrame *frame) {
PIT_TICKS++;
return INTR_OK;
}
void intr_pit_init(void) {
intr_attchhandler(&intr_pit_intr, INTR_IRQBASE+0);
uint32_t hz = 1000;
uint32_t div = PIT_FREQ / hz;
io_out8(PIT_CMD, PIT_CMD_BINARY | PIT_CMD_MODE3 | PIT_CMD_RW_BOTH | PIT_CMD_COUNTER0);
io_out8(PIT_COUNTER0, div & 0xFF);
io_out8(PIT_COUNTER0, div >> 8);
}
void intr_pit_wait(uint32_t ms) {
uint32_t now = PIT_TICKS;
while (PIT_TICKS - now < ms);
}