rust-raspberrypi-OS-tutorials/07_uart_chainloader/src/bsp/raspberrypi/console.rs

// SPDX-License-Identifier: MIT OR Apache-2.0
//
// Copyright (c) 2018-2020 Andre Richter <andre.o.richter@gmail.com>

//! BSP console facilities.

use super::{super::device_driver, memory::map};
use crate::console;
use core::fmt;

//--------------------------------------------------------------------------------------------------
// Public Code
//--------------------------------------------------------------------------------------------------

/// In case of a panic, the panic handler uses this function to take a last shot at printing
/// something before the system is halted.
///
/// # Safety
///
/// - Use only for printing during a panic.
pub unsafe fn panic_console_out() -> impl fmt::Write {
    let mut uart = device_driver::PanicUart::new(map::mmio::PL011_UART_BASE);
    uart.init();
    uart
}

/// Return a reference to the console.
pub fn console() -> &'static impl console::interface::All {
    &super::PL011_UART
}