1 use core::cmp::min;
2
3 use acpi::rsdp::Rsdp;
4 use alloc::string::String;
5 use system_error::SystemError;
6
7 use crate::{
8 arch::init::ArchBootParams,
9 driver::video::fbdev::base::BootTimeScreenInfo,
10 libs::lazy_init::Lazy,
11 mm::{PhysAddr, VirtAddr},
12 };
13
14 use super::boot_params;
15 #[derive(Debug)]
16 pub struct BootParams {
17 pub screen_info: BootTimeScreenInfo,
18 bootloader_name: Option<String>,
19 #[allow(dead_code)]
20 pub arch: ArchBootParams,
21 boot_command_line: [u8; Self::BOOT_COMMAND_LINE_SIZE],
22 pub acpi: BootloaderAcpiArg,
23 }
24
25 impl BootParams {
26 const DEFAULT: Self = BootParams {
27 screen_info: BootTimeScreenInfo::DEFAULT,
28 bootloader_name: None,
29 arch: ArchBootParams::DEFAULT,
30 boot_command_line: [0u8; Self::BOOT_COMMAND_LINE_SIZE],
31 acpi: BootloaderAcpiArg::NotProvided,
32 };
33
34 /// 开机命令行参数字符串最大大小
35 pub const BOOT_COMMAND_LINE_SIZE: usize = 2048;
36
new() -> Self37 pub(super) const fn new() -> Self {
38 Self::DEFAULT
39 }
40
41 /// 开机命令行参数（原始字节数组）
42 #[allow(dead_code)]
boot_cmdline(&self) -> &[u8]43 pub fn boot_cmdline(&self) -> &[u8] {
44 &self.boot_command_line
45 }
46
47 /// 开机命令行参数字符串
boot_cmdline_str(&self) -> &str48 pub fn boot_cmdline_str(&self) -> &str {
49 core::str::from_utf8(self.boot_cmdline()).unwrap()
50 }
51
bootloader_name(&self) -> Option<&str>52 pub fn bootloader_name(&self) -> Option<&str> {
53 self.bootloader_name.as_deref()
54 }
55
56 /// 追加开机命令行参数
57 ///
58 /// 如果开机命令行参数已经满了，则不会追加。
59 /// 如果超过了最大长度，则截断。
60 ///
61 /// ## 参数
62 ///
63 /// - `data`：追加的数据
boot_cmdline_append(&mut self, data: &[u8])64 pub fn boot_cmdline_append(&mut self, data: &[u8]) {
65 if data.is_empty() {
66 return;
67 }
68
69 let mut pos: Option<usize> = None;
70 // 寻找结尾
71 for (i, x) in self.boot_command_line.iter().enumerate() {
72 if *x == 0 {
73 pos = Some(i);
74 break;
75 }
76 }
77 let pos = pos.unwrap_or(self.boot_command_line.len() - 1) as isize;
78
79 let avail = self.boot_command_line.len() as isize - pos - 1;
80 if avail <= 0 {
81 return;
82 }
83
84 let len = min(avail as usize, data.len());
85 let pos = pos as usize;
86 self.boot_command_line[pos..pos + len].copy_from_slice(&data[0..len]);
87
88 self.boot_command_line[pos + len] = 0;
89 }
90
91 /// 获取FDT的虚拟地址
92 #[allow(dead_code)]
fdt(&self) -> Option<VirtAddr>93 pub fn fdt(&self) -> Option<VirtAddr> {
94 #[cfg(target_arch = "riscv64")]
95 return Some(self.arch.arch_fdt());
96
97 #[cfg(target_arch = "x86_64")]
98 return None;
99 }
100
101 /// 获取FDT的物理地址
102 #[allow(dead_code)]
fdt_paddr(&self) -> Option<PhysAddr>103 pub fn fdt_paddr(&self) -> Option<PhysAddr> {
104 #[cfg(target_arch = "riscv64")]
105 return Some(self.arch.fdt_paddr);
106
107 #[cfg(target_arch = "x86_64")]
108 return None;
109 }
110 }
111
112 /// 开机引导回调，用于初始化内核启动参数
113 pub trait BootCallbacks: Send + Sync {
114 /// 初始化引导程序名称
init_bootloader_name(&self) -> Result<Option<String>, SystemError>115 fn init_bootloader_name(&self) -> Result<Option<String>, SystemError>;
116 /// 初始化ACPI参数
init_acpi_args(&self) -> Result<BootloaderAcpiArg, SystemError>117 fn init_acpi_args(&self) -> Result<BootloaderAcpiArg, SystemError>;
118 /// 初始化内核命令行参数
119 ///
120 /// 该函数应该把内核命令行参数追加到`boot_params().boot_cmdline`中
init_kernel_cmdline(&self) -> Result<(), SystemError>121 fn init_kernel_cmdline(&self) -> Result<(), SystemError>;
122 /// 初始化帧缓冲区信息
123 ///
124 /// - 该函数应该把帧缓冲区信息写入`scinfo`中。
125 /// - 该函数应该在内存管理初始化之前调用。
early_init_framebuffer_info( &self, scinfo: &mut BootTimeScreenInfo, ) -> Result<(), SystemError>126 fn early_init_framebuffer_info(
127 &self,
128 scinfo: &mut BootTimeScreenInfo,
129 ) -> Result<(), SystemError>;
130
131 /// 初始化内存块
early_init_memory_blocks(&self) -> Result<(), SystemError>132 fn early_init_memory_blocks(&self) -> Result<(), SystemError>;
133 }
134
135 static BOOT_CALLBACKS: Lazy<&'static dyn BootCallbacks> = Lazy::new();
136
137 /// 注册开机引导回调
register_boot_callbacks(callbacks: &'static dyn BootCallbacks)138 pub fn register_boot_callbacks(callbacks: &'static dyn BootCallbacks) {
139 BOOT_CALLBACKS.init(callbacks);
140 }
141
142 /// 获取开机引导回调
boot_callbacks() -> &'static dyn BootCallbacks143 pub fn boot_callbacks() -> &'static dyn BootCallbacks {
144 let p = BOOT_CALLBACKS
145 .try_get()
146 .expect("Boot callbacks not initialized");
147
148 *p
149 }
150
boot_callback_except_early()151 pub(super) fn boot_callback_except_early() {
152 boot_callbacks()
153 .init_kernel_cmdline()
154 .inspect_err(|e| {
155 log::error!("Failed to init kernel cmdline: {:?}", e);
156 })
157 .ok();
158
159 let mut boot_params = boot_params().write();
160 boot_params.bootloader_name = boot_callbacks()
161 .init_bootloader_name()
162 .expect("Failed to init bootloader name");
163 boot_params.acpi = boot_callbacks()
164 .init_acpi_args()
165 .unwrap_or(BootloaderAcpiArg::NotProvided);
166 }
167
168 /// ACPI information from the bootloader.
169 #[derive(Copy, Clone, Debug)]
170 pub enum BootloaderAcpiArg {
171 /// The bootloader does not provide one, a manual search is needed.
172 NotProvided,
173 /// Physical address of the RSDP.
174 #[allow(dead_code)]
175 Rsdp(PhysAddr),
176 /// Address of RSDT provided in RSDP v1.
177 Rsdt(Rsdp),
178 /// Address of XSDT provided in RSDP v2+.
179 Xsdt(Rsdp),
180 }
181