1 use crate::{ 2 arch::{ 3 init::{early_setup_arch, setup_arch, setup_arch_post}, 4 CurrentIrqArch, CurrentSMPArch, CurrentSchedArch, 5 }, 6 driver::{base::init::driver_init, tty::init::tty_early_init, video::VideoRefreshManager}, 7 exception::{init::irq_init, softirq::softirq_init, InterruptArch}, 8 filesystem::vfs::core::vfs_init, 9 include::bindings::bindings::acpi_init, 10 init::init_intertrait, 11 libs::{ 12 futex::futex::Futex, 13 lib_ui::{ 14 screen_manager::{scm_init, scm_reinit}, 15 textui::textui_init, 16 }, 17 }, 18 mm::init::mm_init, 19 process::{kthread::kthread_init, process_init, ProcessManager}, 20 sched::{core::sched_init, SchedArch}, 21 smp::SMPArch, 22 syscall::Syscall, 23 time::{ 24 clocksource::clocksource_boot_finish, timekeeping::timekeeping_init, timer::timer_init, 25 }, 26 }; 27 28 /// The entry point for the kernel 29 /// 30 /// 前面可能会有一个架构相关的函数 31 pub fn start_kernel() -> ! { 32 // 进入内核后，中断应该是关闭的 33 assert_eq!(CurrentIrqArch::is_irq_enabled(), false); 34 35 do_start_kernel(); 36 37 CurrentSchedArch::initial_setup_sched_local(); 38 39 CurrentSchedArch::enable_sched_local(); 40 41 ProcessManager::arch_idle_func(); 42 } 43 44 #[inline(never)] 45 fn do_start_kernel() { 46 init_before_mem_init(); 47 48 early_setup_arch().expect("setup_arch failed"); 49 unsafe { mm_init() }; 50 scm_reinit().unwrap(); 51 textui_init().unwrap(); 52 init_intertrait(); 53 vfs_init().expect("vfs init failed"); 54 driver_init().expect("driver init failed"); 55 unsafe { acpi_init() }; 56 irq_init().expect("irq init failed"); 57 CurrentSMPArch::prepare_cpus().expect("prepare_cpus failed"); 58 59 setup_arch().expect("setup_arch failed"); 60 61 process_init(); 62 sched_init(); 63 softirq_init().expect("softirq init failed"); 64 Syscall::init().expect("syscall init failed"); 65 timekeeping_init(); 66 timer_init(); 67 kthread_init(); 68 clocksource_boot_finish(); 69 70 CurrentSMPArch::init().expect("smp init failed"); 71 // SMP初始化有可能会开中断，所以这里再次检查中断是否关闭 72 assert_eq!(CurrentIrqArch::is_irq_enabled(), false); 73 Futex::init(); 74 75 setup_arch_post().expect("setup_arch_post failed"); 76 77 #[cfg(all(target_arch = "x86_64", feature = "kvm"))] 78 crate::virt::kvm::kvm_init(); 79 } 80 81 /// 在内存管理初始化之前，执行的初始化 82 #[inline(never)] 83 fn init_before_mem_init() { 84 tty_early_init().expect("tty early init failed"); 85 let video_ok = unsafe { VideoRefreshManager::video_init().is_ok() }; 86 scm_init(video_ok); 87 } 88