fix: bugs

kernel/src/debug/serial.rs

@@ -1,4 +1,6 @@
 use core::arch::asm;
+use core::fmt::Write;
+use crate::mem::allocator::Locked;
 
 pub struct SerialPort(u16);
 
@@ -7,16 +9,14 @@ impl SerialPort {
 
     pub unsafe fn init() -> Self {
         let port = Self::COM1;
-        // В новых версиях Rust даже внутри unsafe fn 
-        // вызовы других unsafe функций требуют явного блока
         unsafe {
-            outb(port + 1, 0x00); // Disable interrupts
-            outb(port + 3, 0x80); // Enable DLAB
-            outb(port + 0, 0x03); // Divisor 3 (38400 baud)
             outb(port + 1, 0x00);
-            outb(port + 3, 0x03); // 8 bits, no parity, 1 stop bit
-            outb(port + 2, 0xC7); // Enable FIFO
-            outb(port + 4, 0x0B); // IRQs enabled, RTS/DSR set
+            outb(port + 3, 0x80);
+            outb(port + 0, 0x03);
+            outb(port + 1, 0x00);
+            outb(port + 3, 0x03);
+            outb(port + 2, 0xC7);
+            outb(port + 4, 0x0B);
         }
         SerialPort(port)
     }
@@ -38,6 +38,20 @@ impl core::fmt::Write for SerialPort {
     }
 }
 
+static SERIAL_PORT: Locked<Option<SerialPort>> = Locked::new(None);
+
+pub fn init_global() {
+    let mut guard = SERIAL_PORT.lock();
+    *guard = Some(unsafe { SerialPort::init() });
+}
+
+pub fn write_global(args: core::fmt::Arguments) {
+    let mut guard = SERIAL_PORT.lock();
+    if let Some(ref mut sp) = *guard {
+        let _ = sp.write_fmt(args);
+    }
+}
+
 unsafe fn outb(port: u16, val: u8) {
     unsafe {
         asm!("out dx, al", in("dx") port, in("al") val, options(nomem, nostack, preserves_flags));