Major libk restructuring, also rewrote drivers/serial.h

libk/include/drivers/serial.h

@@ -0,0 +1,23 @@
+#ifndef _DRIVERS_SERIAL_H
+#define _DRIVERS_SERIAL_H
+
+#include <stdarg.h>
+
+#define PORT_COM1   0x3f8
+#define PORT_COM2   0x2f8
+#define PORT_COM3   0x3e8
+#define PORT_COM4   0x2e8
+
+// IRQ4 -> COM1, IRQ3 -> COM2
+#define SERIAL_IRQ  4
+
+int serialEnable(int port);
+int setupSerial();
+void serialWrite(int port, char c);
+char serialRead(int port);
+char serialReadAsync(int port);
+
+int debugf(const char* fmt, ...);
+int vdebugf(const char* fmt, va_list va);
+
+#endif