An experimental microkernel OS
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use lazy_static::lazy_static;
use spin::Mutex;
use uart_16550::SerialPort;
lazy_static! {
pub static ref SERIAL1: Mutex<SerialPort> = {
let mut serial_port = unsafe { SerialPort::new(0x3F8) };
serial_port.init();
Mutex::new(serial_port)
};
}
#[doc(hidden)]
pub fn _print(args: ::core::fmt::Arguments) {
use core::fmt::Write;
use x86_64::instructions::interrupts;
interrupts::without_interrupts(|| {
SERIAL1
.lock()
.write_fmt(args)
.expect("Printing to serial failed");
});
}
/// Prints to the host through the serial interface.
#[macro_export]
macro_rules! serial_print {
($($arg:tt)*) => {
$crate::serial::_print(format_args!($($arg)*));
};
}
/// Prints to the host through the serial interface, appending a newline.
#[macro_export]
macro_rules! serial_println {
() => ($crate::serial_print!("\n"));
($fmt:expr) => ($crate::serial_print!(concat!($fmt, "\n")));
($fmt:expr, $($arg:tt)*) => ($crate::serial_print!(
concat!($fmt, "\n"), $($arg)*));
}