add keyboard interrupt

src/interrupts.rs

@@ -14,6 +14,7 @@ lazy_static! {
                 .set_stack_index(gdt::DOUBLE_FAULT_IST_INDEX);
         }
         idt[InterruptIndex::Timer.as_usize()].set_handler_fn(timer_interrupt_handler);
+        idt[InterruptIndex::Keyboard.as_usize()].set_handler_fn(keyboard_interrupt_handler);
 
         idt
     };
@@ -44,6 +45,7 @@ pub static PICS: spin::Mutex<ChainedPics> =
 #[repr(u8)]
 pub enum InterruptIndex {
     Timer = PIC_1_OFFSET,
+    Keyboard,
 }
 
 impl InterruptIndex {
@@ -65,6 +67,39 @@ extern "x86-interrupt" fn timer_interrupt_handler(_stack_frame: InterruptStackFr
     }
 }
 
+extern "x86-interrupt" fn keyboard_interrupt_handler(_stack_frame: InterruptStackFrame) {
+    use pc_keyboard::{layouts, DecodedKey, HandleControl, Keyboard, ScancodeSet1};
+    use spin::Mutex;
+    use x86_64::instructions::port::Port;
+
+    lazy_static! {
+        static ref KEYBOARD: Mutex<Keyboard<layouts::Us104Key, ScancodeSet1>> =
+            Mutex::new(Keyboard::new(
+                ScancodeSet1::new(),
+                layouts::Us104Key,
+                HandleControl::Ignore
+            ));
+    }
+
+    let mut keyboard = KEYBOARD.lock();
+    let mut port = Port::new(0x60);
+
+    let scancode: u8 = unsafe { port.read() };
+    if let Ok(Some(key_event)) = keyboard.add_byte(scancode) {
+        if let Some(key) = keyboard.process_keyevent(key_event) {
+            match key {
+                DecodedKey::Unicode(character) => print!("{}", character),
+                DecodedKey::RawKey(key) => print!("{:?}", key),
+            }
+        }
+    }
+
+    unsafe {
+        PICS.lock()
+            .notify_end_of_interrupt(InterruptIndex::Keyboard.as_u8());
+    }
+}
+
 #[test_case]
 fn test_breakpoint_exception() {
     x86_64::instructions::interrupts::int3();