Function kernel_thread_main

kernel/src/main.rs:27–66

Main kernel thread entry point This is the first process added to the scheduler which is started once basic kernel functions have been initialised in kernel_entry

()

/// which is started once basic kernel functions have
/// been initialised in kernel_entry
fn kernel_thread_main() {
    // User-space init process
    let null = Arc::new(RwLock::new(Rendezvous::Empty));
    let init_screen = Arc::new(RwLock::new(Rendezvous::Empty));
    let init_thread = process::new_user_thread(
        include_bytes!("../../user/init"),
        process::Params{
            handles: Vec::from([
                // Null input
                null,
                // Output used to pass data
                init_screen.clone()
            ]),
            io_privileges: true,
            mounts: vfs::VFS::new(), // Create a Virtual File System
            args: Vec::new(),
            envs: Vec::new(),
        }).unwrap();

    // Allocate a memory chunk mapping video memory
    let (virtaddr, _) = process::special_memory_chunk(
        &init_thread,
        32,  // Pages, 128k. 0xC0000 - 0xA0000
        0xA0000).unwrap();

    // Remove chunk from table so it can be sent
    let (physaddr, _) = init_thread.take_memory_chunk(virtaddr).unwrap();

    // Send a message to init process containing the chunk.
    // When received the chunk will be mapped into address space
    init_screen.write().send(None, Message::Long(
        message::VIDEO_MEMORY,
        (0xC0000 - 0xA0000).into(),
        physaddr.into()
    ));

    process::schedule_thread(init_thread);

    kernel::hlt_loop();
}

/// Function called by the bootloader
/// via _start entry point declared in entry_point! above