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 use log::warn; 32 33 use super::{ 34 boot::{boot_callback_except_early, boot_callbacks}, 35 cmdline::kenrel_cmdline_param_manager, 36 }; 37 38 /// The entry point for the kernel 39 /// 40 /// 前面可能会有一个架构相关的函数 41 pub fn start_kernel() -> ! { 42 // 进入内核后，中断应该是关闭的 43 assert!(!CurrentIrqArch::is_irq_enabled()); 44 45 do_start_kernel(); 46 47 CurrentSchedArch::initial_setup_sched_local(); 48 49 CurrentSchedArch::enable_sched_local(); 50 51 ProcessManager::arch_idle_func(); 52 } 53 54 #[inline(never)] 55 fn do_start_kernel() { 56 init_before_mem_init(); 57 58 unsafe { mm_init() }; 59 60 if scm_reinit().is_ok() { 61 if let Err(e) = textui_init() { 62 warn!("Failed to init textui: {:?}", e); 63 } 64 } 65 // 初始化内核命令行参数 66 kenrel_cmdline_param_manager().init(); 67 boot_callback_except_early(); 68 69 init_intertrait(); 70 71 vfs_init().expect("vfs init failed"); 72 driver_init().expect("driver init failed"); 73 74 acpi_init().expect("acpi init failed"); 75 crate::sched::sched_init(); 76 process_init(); 77 early_smp_init().expect("early smp init failed"); 78 irq_init().expect("irq init failed"); 79 setup_arch().expect("setup_arch failed"); 80 CurrentSMPArch::prepare_cpus().expect("prepare_cpus failed"); 81 82 // sched_init(); 83 softirq_init().expect("softirq init failed"); 84 Syscall::init().expect("syscall init failed"); 85 timekeeping_init(); 86 time_init(); 87 timer_init(); 88 kthread_init(); 89 setup_arch_post().expect("setup_arch_post failed"); 90 clocksource_boot_finish(); 91 Futex::init(); 92 crate::bpf::init_bpf_system(); 93 #[cfg(all(target_arch = "x86_64", feature = "kvm"))] 94 crate::virt::kvm::kvm_init(); 95 } 96 97 /// 在内存管理初始化之前，执行的初始化 98 #[inline(never)] 99 fn init_before_mem_init() { 100 serial_early_init().expect("serial early init failed"); 101 let video_ok = unsafe { VideoRefreshManager::video_init().is_ok() }; 102 scm_init(video_ok); 103 104 early_init_logging(); 105 106 early_setup_arch().expect("setup_arch failed"); 107 108 boot_callbacks() 109 .init_kernel_cmdline() 110 .inspect_err(|e| { 111 log::error!("Failed to init kernel cmdline: {:?}", e); 112 }) 113 .ok(); 114 kenrel_cmdline_param_manager().early_init(); 115 } 116