base for pit initialization(not

kernel.c

@@ -2,12 +2,14 @@
 #include "types.h"
 #include "tests.h"
 #include "interrupts.h"
+#include "pit.h"
 #include "stlio.h"
 #include "gdt.h"
 
 void kinit() {
 	//gdt_configure();
 	init_idt();
+	pit_install_timer();
 	test_dispatcher();
 }
 

pit.c

@@ -0,0 +1,19 @@
+#include "pit.h"
+#include "types.h"
+#include "interrupts.h"
+#include "stlio.h"
+
+timer_ticks = 0;
+
+void inc_ticks(struct cpu_reg_state* cpu) {
+    timer_ticks++;
+    if(timer_ticks % 18 == 0) {
+        printf("One second passed\n");
+    }
+}
+
+void tick_width(u32 width) {
+}
+void pit_install_timer(void) {
+    init_irq_handler(0, inc_ticks); // timer interrupt request falls into int 0
+}

pit.h

@@ -0,0 +1,13 @@
+#include "types.h"
+
+u32 timer_ticks;
+// 60hz timer for now
+#define PIT_TIMER_INTERVAL 100
+#define PIT_TIME_DATA0 0x40
+#define PIT_TIME_DATA1 0x41
+#define PIT_TIME_DATA2 0x42
+
+// Sets the tick rate 100hz
+void tick_width(u32);
+
+void inc_ticks(struct cpu_reg_state* cpu);