1 use log::warn; 2 3 use crate::{ 4 arch::{ 5 init::{early_setup_arch, setup_arch, setup_arch_post}, 6 time::time_init, 7 CurrentIrqArch, CurrentSMPArch, CurrentSchedArch, 8 }, 9 driver::{ 10 acpi::acpi_init, base::init::driver_init, serial::serial_early_init, 11 video::VideoRefreshManager, 12 }, 13 exception::{init::irq_init, softirq::softirq_init, InterruptArch}, 14 filesystem::vfs::core::vfs_init, 15 init::init_intertrait, 16 libs::{ 17 futex::futex::Futex, 18 lib_ui::{ 19 screen_manager::{scm_init, scm_reinit}, 20 textui::textui_init, 21 }, 22 printk::early_init_logging, 23 }, 24 mm::init::mm_init, 25 process::{kthread::kthread_init, process_init, ProcessManager}, 26 sched::SchedArch, 27 smp::{early_smp_init, SMPArch}, 28 syscall::Syscall, 29 time::{ 30 clocksource::clocksource_boot_finish, timekeeping::timekeeping_init, timer::timer_init, 31 }, 32 }; 33 34 use super::{ 35 boot::{boot_callback_except_early, boot_callbacks}, 36 cmdline::kenrel_cmdline_param_manager, 37 }; 38 39 /// The entry point for the kernel 40 /// 41 /// 前面可能会有一个架构相关的函数 42 pub fn start_kernel() -> ! { 43 // 进入内核后，中断应该是关闭的 44 assert!(!CurrentIrqArch::is_irq_enabled()); 45 46 do_start_kernel(); 47 48 CurrentSchedArch::initial_setup_sched_local(); 49 50 CurrentSchedArch::enable_sched_local(); 51 52 ProcessManager::arch_idle_func(); 53 } 54 55 #[inline(never)] 56 fn do_start_kernel() { 57 init_before_mem_init(); 58 59 unsafe { mm_init() }; 60 61 if scm_reinit().is_ok() { 62 if let Err(e) = textui_init() { 63 warn!("Failed to init textui: {:?}", e); 64 } 65 } 66 // 初始化内核命令行参数 67 kenrel_cmdline_param_manager().init(); 68 boot_callback_except_early(); 69 70 init_intertrait(); 71 72 vfs_init().expect("vfs init failed"); 73 driver_init().expect("driver init failed"); 74 75 acpi_init().expect("acpi init failed"); 76 crate::sched::sched_init(); 77 process_init(); 78 early_smp_init().expect("early smp init failed"); 79 irq_init().expect("irq init failed"); 80 setup_arch().expect("setup_arch failed"); 81 CurrentSMPArch::prepare_cpus().expect("prepare_cpus failed"); 82 83 // sched_init(); 84 softirq_init().expect("softirq init failed"); 85 Syscall::init().expect("syscall init failed"); 86 timekeeping_init(); 87 time_init(); 88 timer_init(); 89 kthread_init(); 90 setup_arch_post().expect("setup_arch_post failed"); 91 clocksource_boot_finish(); 92 93 Futex::init(); 94 95 #[cfg(all(target_arch = "x86_64", feature = "kvm"))] 96 crate::virt::kvm::kvm_init(); 97 } 98 99 /// 在内存管理初始化之前，执行的初始化 100 #[inline(never)] 101 fn init_before_mem_init() { 102 serial_early_init().expect("serial early init failed"); 103 let video_ok = unsafe { VideoRefreshManager::video_init().is_ok() }; 104 scm_init(video_ok); 105 106 early_init_logging(); 107 108 early_setup_arch().expect("setup_arch failed"); 109 110 boot_callbacks() 111 .init_kernel_cmdline() 112 .inspect_err(|e| { 113 log::error!("Failed to init kernel cmdline: {:?}", e); 114 }) 115 .ok(); 116 kenrel_cmdline_param_manager().early_init(); 117 } 118