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::{net::e1000e::e1000e::e1000e_init, virtio::virtio::virtio_probe}, 9 filesystem::vfs::core::mount_root_fs, 10 kdebug, kerror, 11 net::net_core::net_init, 12 process::{kthread::KernelThreadMechanism, stdio::stdio_init}, 13 smp::smp_init, 14 }; 15 16 use super::initcall::do_initcalls; 17 18 pub fn initial_kernel_thread() -> i32 { 19 kernel_init().unwrap_or_else(|err| { 20 panic!("Failed to initialize kernel: {:?}", err); 21 }); 22 23 switch_to_user(); 24 25 unreachable!(); 26 } 27 28 fn kernel_init() -> Result<(), SystemError> { 29 KernelThreadMechanism::init_stage2(); 30 kenrel_init_freeable()?; 31 32 // 由于目前加锁，速度过慢，所以先不开启双缓冲 33 // scm_enable_double_buffer().expect("Failed to enable double buffer"); 34 35 #[cfg(target_arch = "x86_64")] 36 crate::driver::disk::ahci::ahci_init().expect("Failed to initialize AHCI"); 37 38 virtio_probe(); 39 mount_root_fs().expect("Failed to mount root fs"); 40 41 e1000e_init(); 42 net_init().unwrap_or_else(|err| { 43 kerror!("Failed to initialize network: {:?}", err); 44 }); 45 46 kdebug!("initial kernel thread done."); 47 48 return Ok(()); 49 } 50 51 #[inline(never)] 52 fn kenrel_init_freeable() -> Result<(), SystemError> { 53 do_initcalls().unwrap_or_else(|err| { 54 panic!("Failed to initialize subsystems: {:?}", err); 55 }); 56 stdio_init().expect("Failed to initialize stdio"); 57 smp_init(); 58 59 return Ok(()); 60 } 61 62 /// 切换到用户态 63 fn switch_to_user() { 64 const INIT_PROGRAM: &str = "/bin/dragonreach"; 65 let path = String::from(INIT_PROGRAM); 66 let argv = vec![path.clone()]; 67 let envp = vec![String::from("PATH=/")]; 68 69 unsafe { arch_switch_to_user(path, argv, envp) }; 70 } 71