1 //! 这个文件内放置初始内核线程的代码。
2
3 use alloc::string::String;
4 use system_error::SystemError;
5
6 use crate::{
7 arch::process::arch_switch_to_user,
8 driver::{
9 disk::ahci::ahci_init, net::e1000e::e1000e::e1000e_init, virtio::virtio::virtio_probe,
10 },
11 filesystem::vfs::core::mount_root_fs,
12 kdebug, kerror,
13 net::net_core::net_init,
14 process::{kthread::KernelThreadMechanism, process::stdio_init},
15 };
16
17 use super::initcall::do_initcalls;
18
initial_kernel_thread() -> i3219 pub fn initial_kernel_thread() -> i32 {
20 kernel_init().unwrap_or_else(|err| {
21 panic!("Failed to initialize kernel: {:?}", err);
22 });
23
24 switch_to_user();
25
26 loop {}
27 }
28
kernel_init() -> Result<(), SystemError>29 fn kernel_init() -> Result<(), SystemError> {
30 KernelThreadMechanism::init_stage2();
31 kenrel_init_freeable()?;
32
33 // 由于目前加锁，速度过慢，所以先不开启双缓冲
34 // scm_enable_double_buffer().expect("Failed to enable double buffer");
35 stdio_init().expect("Failed to initialize stdio");
36
37 ahci_init().expect("Failed to initialize AHCI");
38
39 mount_root_fs().expect("Failed to mount root fs");
40
41 virtio_probe();
42 e1000e_init();
43 net_init().unwrap_or_else(|err| {
44 kerror!("Failed to initialize network: {:?}", err);
45 });
46
47 kdebug!("initial kernel thread done.");
48
49 return Ok(());
50 }
51
52 #[inline(never)]
kenrel_init_freeable() -> Result<(), SystemError>53 fn kenrel_init_freeable() -> Result<(), SystemError> {
54 do_initcalls().unwrap_or_else(|err| {
55 panic!("Failed to initialize subsystems: {:?}", err);
56 });
57
58 return Ok(());
59 }
60
61 /// 切换到用户态
switch_to_user()62 fn switch_to_user() {
63 let path = String::from("/bin/dragonreach");
64 let argv = vec![String::from("/bin/dragonreach")];
65 let envp = vec![String::from("PATH=/")];
66
67 unsafe { arch_switch_to_user(path, argv, envp) };
68 }
69