Implemented PIT

kernel/include/isr.h

@@ -16,7 +16,7 @@ struct isr_int_frame {
 typedef void (*isr_handler_ptr)(struct isr_int_frame* iframe);
 
 int isr_init(void);
-void isr_register_IRQ(uint8_t i, isr_handler_ptr handler);
+void isr_register(uint8_t i, isr_handler_ptr handler);
 int isr_handle_interrupt(struct isr_int_frame iframe);
 
 // Assembly definitions (isr.s)

kernel/include/system.h

@@ -3,6 +3,7 @@
 
 #include <kernel.h>
 
+// cpuid
 void cpuid(uint32_t* eax, uint32_t* ebx, uint32_t* ecx, uint32_t* edx);
 
 // Ports

kernel/include/timer.h

@@ -0,0 +1,22 @@
+#ifndef _TIMER_H
+#define _TIMER_H
+
+#include <isr.h>
+
+#define PIT_DIV 1193180
+#define PIT_CH0	0x40
+#define PIT_CH1	0x41
+#define PIT_CH2	0x42
+#define PIT_CMD	0x43
+
+int  timer_init(void);
+void timer_wait(size_t ticks);
+
+int  pit_init(void);
+void pit_phase(uint8_t ch, uint8_t mode, uint32_t hz);
+void pit_handler(struct isr_int_frame* iframe);
+
+// TODO: rtc_init(void);
+// TODO: hpet_init(void);
+
+#endif