bjorn3
63 lines
1.8 KiB
Rust
63 lines
1.8 KiB
Rust
use crate::{
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devices::{serial::SerialKind, uart_16550::SerialPort},
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syscall::io::{Mmio, Pio},
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};
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use spin::Mutex;
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pub static COM1: Mutex<SerialKind> = Mutex::new(SerialKind::NotPresent);
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pub static COM2: Mutex<SerialKind> = Mutex::new(SerialKind::NotPresent);
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pub static LPSS: Mutex<SerialKind> = Mutex::new(SerialKind::NotPresent);
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pub unsafe fn init() {
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#[cfg(feature = "system76_ec_debug")]
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super::system76_ec::init();
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if cfg!(not(feature = "serial_debug")) {
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// FIXME remove serial_debug feature once ACPI SPCR is respected on UEFI boots.
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return;
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}
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let mut com1 = SerialPort::<Pio<u8>>::new(0x3F8);
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com1.init();
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*COM1.lock() = SerialKind::Ns16550Pio(com1);
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let mut com2 = SerialPort::<Pio<u8>>::new(0x2F8);
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com2.init();
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*COM2.lock() = SerialKind::Ns16550Pio(com2);
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// FIXME remove explicit LPSS handling once ACPI SPCR is supported
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if cfg!(not(feature = "lpss_debug")) {
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return;
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}
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// TODO: Make this configurable
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let address = crate::PHYS_OFFSET + 0xFE032000;
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{
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use rmm::PageFlags;
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use crate::{
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memory::{KernelMapper, PhysicalAddress},
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paging::VirtualAddress,
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};
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let mut mapper = KernelMapper::lock();
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let virt = VirtualAddress::new(address);
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let phys = PhysicalAddress::new(address - crate::PHYS_OFFSET);
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let flags = PageFlags::new().write(true).execute(false);
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unsafe {
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mapper
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.get_mut()
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.unwrap()
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.map_phys(virt, phys, flags)
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.expect("failed to map frame")
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.flush();
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}
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}
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let lpss = unsafe { SerialPort::<Mmio<u32>>::new(crate::PHYS_OFFSET + 0xFE032000) };
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lpss.init();
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*LPSS.lock() = SerialKind::Ns16550u32(lpss);
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}
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