1 use core::cmp::min; 2 3 use crate::{ 4 arch::init::ArchBootParams, 5 driver::{ 6 tty::init::tty_early_init, 7 video::{fbdev::base::BootTimeScreenInfo, VideoRefreshManager}, 8 }, 9 libs::{lib_ui::screen_manager::scm_init, rwlock::RwLock}, 10 }; 11 12 mod c_adapter; 13 14 pub mod initcall; 15 pub mod initial_kthread; 16 17 /// 启动参数 18 static BOOT_PARAMS: RwLock<BootParams> = RwLock::new(BootParams::new()); 19 20 #[inline(always)] 21 pub fn boot_params() -> &'static RwLock<BootParams> { 22 &BOOT_PARAMS 23 } 24 25 fn init_intertrait() { 26 intertrait::init_caster_map(); 27 } 28 29 /// 在内存管理初始化之前，执行的初始化 30 pub fn init_before_mem_init() { 31 tty_early_init().expect("tty early init failed"); 32 let video_ok = unsafe { VideoRefreshManager::video_init().is_ok() }; 33 scm_init(video_ok); 34 } 35 36 #[derive(Debug)] 37 pub struct BootParams { 38 pub screen_info: BootTimeScreenInfo, 39 pub arch: ArchBootParams, 40 boot_command_line: [u8; Self::BOOT_COMMAND_LINE_SIZE], 41 } 42 43 impl BootParams { 44 const DEFAULT: Self = BootParams { 45 screen_info: BootTimeScreenInfo::DEFAULT, 46 arch: ArchBootParams::DEFAULT, 47 boot_command_line: [0u8; Self::BOOT_COMMAND_LINE_SIZE], 48 }; 49 50 /// 开机命令行参数字符串最大大小 51 pub const BOOT_COMMAND_LINE_SIZE: usize = 2048; 52 53 const fn new() -> Self { 54 Self::DEFAULT 55 } 56 57 /// 开机命令行参数（原始字节数组） 58 #[allow(dead_code)] 59 pub fn boot_cmdline(&self) -> &[u8] { 60 &self.boot_command_line 61 } 62 63 /// 开机命令行参数字符串 64 pub fn boot_cmdline_str(&self) -> &str { 65 core::str::from_utf8(self.boot_cmdline()).unwrap() 66 } 67 68 /// 追加开机命令行参数 69 /// 70 /// 如果开机命令行参数已经满了，则不会追加。 71 /// 如果超过了最大长度，则截断。 72 /// 73 /// ## 参数 74 /// 75 /// - `data`：追加的数据 76 pub fn boot_cmdline_append(&mut self, data: &[u8]) { 77 if data.is_empty() { 78 return; 79 } 80 81 let mut pos: Option<usize> = None; 82 // 寻找结尾 83 for (i, x) in self.boot_command_line.iter().enumerate() { 84 if *x == 0 { 85 pos = Some(i); 86 break; 87 } 88 } 89 let pos = pos.unwrap_or_else(|| self.boot_command_line.len() - 1) as isize; 90 91 let avail = self.boot_command_line.len() as isize - pos - 1; 92 if avail <= 0 { 93 return; 94 } 95 96 let len = min(avail as usize, data.len()); 97 let pos = pos as usize; 98 self.boot_command_line[pos..pos + len].copy_from_slice(&data[0..len]); 99 100 self.boot_command_line[pos + len] = 0; 101 } 102 } 103