forked from AbleOS/ableos
80 lines
2.2 KiB
Rust
80 lines
2.2 KiB
Rust
use limine::{LimineHhdmRequest, LimineKernelFileRequest, LimineMmapRequest, LimineModuleRequest};
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use spin::Mutex;
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use uart_16550::SerialPort;
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use x86_64::VirtAddr;
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use crate::allocator;
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mod gdt;
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mod interrupts;
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mod memory;
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static SERIAL_CONSOLE: Mutex<SerialPort> = Mutex::new(unsafe { SerialPort::new(0x3f8) });
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#[no_mangle]
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unsafe extern "C" fn _kernel_start() -> ! {
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static HDHM_REQ: LimineHhdmRequest = LimineHhdmRequest::new(0);
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static MMAP_REQ: LimineMmapRequest = LimineMmapRequest::new(0);
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static KFILE_REQ: LimineKernelFileRequest = LimineKernelFileRequest::new(0);
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static MOD_REQ: LimineModuleRequest = LimineModuleRequest::new(0);
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SERIAL_CONSOLE.lock().init();
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crate::logger::init().expect("failed to set logger");
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log::info!("Initialising AKern {}", crate::VERSION);
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memory::init_pt(VirtAddr::new(
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HDHM_REQ
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.get_response()
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.get()
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.expect("tried to get physical memory mapping offset from Limine")
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.offset,
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));
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memory::init_falloc(
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MMAP_REQ
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.get_response()
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.get()
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.and_then(limine::LimineMemmapResponse::mmap)
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.expect("tried to get memory map from Limine"),
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);
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allocator::init();
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gdt::init();
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interrupts::init();
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crate::kmain::kmain(
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KFILE_REQ
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.get_response()
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.get()
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.and_then(|r| r.kernel_file.get())
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.expect("failed to get kernel file from Limine")
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.cmdline
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.to_string()
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.unwrap_or_default(),
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MOD_REQ
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.get_response()
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.get()
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.and_then(|r| r.modules())
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.and_then(|m| m.get(0))
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.map(|file| unsafe {
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core::slice::from_raw_parts(
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file.base.as_ptr().expect("invalid initrd"),
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file.length as usize,
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)
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}),
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)
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}
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/// Format args to serial console
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pub fn serial_fmt(args: core::fmt::Arguments<'_>) -> core::fmt::Result {
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use core::fmt::Write;
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x86_64::instructions::interrupts::without_interrupts(|| SERIAL_CONSOLE.lock().write_fmt(args))
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}
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/// Spin loop
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pub fn sloop() -> ! {
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loop {
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x86_64::instructions::hlt();
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}
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}
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