refactor(pit): migrate to x86_64 crate

src/arch/x86_64/kernel/pit.rs

@@ -1,16 +1,27 @@
 #![allow(dead_code)]
 
-use x86::io::*;
+use x86_64::instructions::port::Port;
 
 use crate::arch::x86_64::kernel::pic;
 
 const PIT_CLOCK: u64 = 1_193_182;
 pub const PIT_INTERRUPT_NUMBER: u8 = pic::PIC1_INTERRUPT_OFFSET;
 
-const PIT_CHANNEL0_DATA_PORT: u16 = 0x40;
-const PIT_CHANNEL1_DATA_PORT: u16 = 0x41;
-const PIT_CHANNEL2_DATA_PORT: u16 = 0x42;
-const PIT_COMMAND_PORT: u16 = 0x43;
+const fn pit_channel0_data() -> Port<u8> {
+	Port::new(0x40)
+}
+
+const fn pit_channel1_data() -> Port<u8> {
+	Port::new(0x41)
+}
+
+const fn pit_channel2_data() -> Port<u8> {
+	Port::new(0x42)
+}
+
+const fn pit_command() -> Port<u8> {
+	Port::new(0x43)
+}
 
 const PIT_BINARY_OUTPUT: u8 = 0b0000_0000;
 const PIT_BCD_OUTPUT: u8 = 0b0000_0001;
@@ -34,8 +45,7 @@ pub fn init(frequency_in_hz: u64) {
 
 	unsafe {
 		// Reset the Programmable Interval Timer (PIT).
-		outb(
-			PIT_COMMAND_PORT,
+		pit_command().write(
 			PIT_BINARY_OUTPUT
 				| PIT_RATE_GENERATOR_MODE
 				| PIT_LOBYTE_ACCESS
@@ -46,8 +56,8 @@ pub fn init(frequency_in_hz: u64) {
 		// Calculate the reload value to count down (round it to the closest integer).
 		// Then transmit it as two individual bytes to the PIT.
 		let count = (PIT_CLOCK + frequency_in_hz / 2) / frequency_in_hz;
-		outb(PIT_CHANNEL0_DATA_PORT, count as u8);
-		outb(PIT_CHANNEL0_DATA_PORT, (count >> 8) as u8);
+		pit_channel0_data().write(count as u8);
+		pit_channel0_data().write((count >> 8) as u8);
 	}
 }