1 use crate::{ 2 arch::{ 3 init::{early_setup_arch, setup_arch, setup_arch_post}, 4 time::time_init, 5 CurrentIrqArch, CurrentSMPArch, CurrentSchedArch, 6 }, 7 driver::{ 8 acpi::acpi_init, base::init::driver_init, serial::serial_early_init, 9 video::VideoRefreshManager, 10 }, 11 exception::{init::irq_init, softirq::softirq_init, InterruptArch}, 12 filesystem::vfs::core::vfs_init, 13 init::init_intertrait, 14 libs::{ 15 futex::futex::Futex, 16 lib_ui::{ 17 screen_manager::{scm_init, scm_reinit}, 18 textui::textui_init, 19 }, 20 printk::early_init_logging, 21 }, 22 mm::init::mm_init, 23 process::{kthread::kthread_init, process_init, ProcessManager}, 24 sched::SchedArch, 25 smp::{early_smp_init, SMPArch}, 26 syscall::Syscall, 27 time::{ 28 clocksource::clocksource_boot_finish, timekeeping::timekeeping_init, timer::timer_init, 29 }, 30 }; 31 32 use super::boot::boot_callback_except_early; 33 34 /// The entry point for the kernel 35 /// 36 /// 前面可能会有一个架构相关的函数 37 pub fn start_kernel() -> ! { 38 // 进入内核后，中断应该是关闭的 39 assert!(!CurrentIrqArch::is_irq_enabled()); 40 41 do_start_kernel(); 42 43 CurrentSchedArch::initial_setup_sched_local(); 44 45 CurrentSchedArch::enable_sched_local(); 46 47 ProcessManager::arch_idle_func(); 48 } 49 50 #[inline(never)] 51 fn do_start_kernel() { 52 init_before_mem_init(); 53 early_init_logging(); 54 55 early_setup_arch().expect("setup_arch failed"); 56 unsafe { mm_init() }; 57 58 scm_reinit().unwrap(); 59 textui_init().unwrap(); 60 61 boot_callback_except_early(); 62 init_intertrait(); 63 64 vfs_init().expect("vfs init failed"); 65 driver_init().expect("driver init failed"); 66 67 acpi_init().expect("acpi init failed"); 68 crate::sched::sched_init(); 69 process_init(); 70 early_smp_init().expect("early smp init failed"); 71 irq_init().expect("irq init failed"); 72 setup_arch().expect("setup_arch failed"); 73 CurrentSMPArch::prepare_cpus().expect("prepare_cpus failed"); 74 75 // sched_init(); 76 softirq_init().expect("softirq init failed"); 77 Syscall::init().expect("syscall init failed"); 78 timekeeping_init(); 79 time_init(); 80 timer_init(); 81 kthread_init(); 82 setup_arch_post().expect("setup_arch_post failed"); 83 clocksource_boot_finish(); 84 85 Futex::init(); 86 87 #[cfg(all(target_arch = "x86_64", feature = "kvm"))] 88 crate::virt::kvm::kvm_init(); 89 } 90 91 /// 在内存管理初始化之前，执行的初始化 92 #[inline(never)] 93 fn init_before_mem_init() { 94 serial_early_init().expect("serial early init failed"); 95 let video_ok = unsafe { VideoRefreshManager::video_init().is_ok() }; 96 scm_init(video_ok); 97 } 98