51 lines
1.2 KiB
Rust
51 lines
1.2 KiB
Rust
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// SPDX-License-Identifier: MPL-2.0
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use alloc::string::ToString;
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use ostd::{
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arch::{
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irq::{IRQ_CHIP, MappedIrqLine},
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serial::SERIAL_PORT,
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},
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irq::IrqLine,
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};
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use spin::Once;
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use crate::{
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CONSOLE_NAME,
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console::{Uart, UartConsole},
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};
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/// ISA interrupt number for UART serial.
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// FIXME: The interrupt number should be retrieved from the ACPI table instead of being hard-coded.
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const ISA_INTR_NUM: u8 = 4;
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/// IRQ line for UART serial.
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static IRQ_LINE: Once<MappedIrqLine> = Once::new();
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pub(super) fn init() {
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let Some(uart) = SERIAL_PORT.get() else {
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return;
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};
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let Ok(mut irq_line) = IrqLine::alloc().and_then(|irq_line| {
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IRQ_CHIP
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.get()
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.unwrap()
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.map_isa_pin_to(irq_line, ISA_INTR_NUM)
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}) else {
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log::info!("[UART]: IRQ line is not available");
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return;
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};
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let uart_console = UartConsole::new(uart);
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aster_console::register_device(CONSOLE_NAME.to_string(), uart_console.clone());
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irq_line.on_active(move |_| uart_console.trigger_input_callbacks());
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IRQ_LINE.call_once(move || irq_line);
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uart.flush();
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log::info!("[UART]: Registered NS16550A as a console");
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}
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