Kernel: Use x86_64::instructions::port for port IO

moon/src/arch/x86_64/io.rs

@@ -1,35 +1,32 @@
 #![cfg(target_arch = "x86_64")]
 #![allow(dead_code)]
 
+use x86_64::instructions::port::Port;
+use spin::Mutex;
+
 pub const COM1: u16 = 0x3f8;
 
+static SERIAL_DATA: Mutex<Port<u8>> = Mutex::new(Port::new(COM1));
+
 use core::arch::asm;
 
-pub unsafe fn outportb(port: u16, value: u8) -> () {
-    asm!("out dx, al", in("al") value, in("dx") port);
-}
-
-pub unsafe fn inportb(port: u16) -> u8 {
-    let value: u8;
-    asm!("in al, dx", out("al") value, in("dx") port);
-    return value;
-}
-
 pub unsafe fn io_delay() -> () {
-    outportb(0x80,0);
+    let mut delay_port: Port<u8> = Port::new(0x80);
+    delay_port.write(0);
 }
 
 pub mod serial {
     use super::*;
 
     unsafe fn wait() -> () {
-        while (inportb(COM1 + 5) & 0x20) == 0 {
+        let mut port: Port<u8> = Port::new(COM1 + 5);
+        while (port.read() & 0x20) == 0 {
             asm!("pause");
         }
     }
     
     pub fn putchar(c: u8) -> () {
         unsafe { wait(); }
-        unsafe { outportb(COM1, c); }
+        unsafe { SERIAL_DATA.lock().write(c); }
     }
 }