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
start_kernel() -> !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)]
do_start_kernel()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)]
init_before_mem_init()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