设备驱动模型：完善platform bus相关内容。并注册串口到sysfs (#403)

* 完成初始化platform bus
* 删除旧的sysfs
* 把uart驱动移动到tty/serial文件夹下
* 完成将串口挂载到sysfs
* 修复vfs系统调用未能follow symlink的问题
* 修复shell未能正确获取pwd的问题

.vscode/settings.json

@@ -180,6 +180,7 @@
     "rust-analyzer.cargo.target": "x86_64-unknown-none",
     "rust-analyzer.checkOnSave.allTargets": false,
     "rust-analyzer.linkedProjects": [
-        "./kernel/Cargo.toml"
+        "./kernel/Cargo.toml",
+        "./kernel/src/libs/ida/Cargo.toml"
     ],
 }

kernel/Cargo.toml

@@ -34,6 +34,7 @@ raw-cpuid = "11.0.1"
 acpi = "5.0.0"
 intertrait = { path = "src/libs/intertrait" }
 linkme = "0.2"
+ida = { path = "src/libs/ida" }
 
 # 构建时依赖项
 [build-dependencies]

kernel/src/arch/io.rs

@@ -0,0 +1,9 @@
+/// 每个架构都需要实现的IO接口
+pub trait PortIOArch {
+    unsafe fn in8(port: u16) -> u8;
+    unsafe fn in16(port: u16) -> u16;
+    unsafe fn in32(port: u16) -> u32;
+    unsafe fn out8(port: u16, data: u8);
+    unsafe fn out16(port: u16, data: u16);
+    unsafe fn out32(port: u16, data: u32);
+}

kernel/src/arch/mod.rs

@@ -7,6 +7,8 @@ use crate::{
     mm::PhysAddr,
 };
 
+pub mod io;
+
 /// TraitPciArch Pci架构相关函数，任何架构都应独立实现trait里的函数
 pub trait TraitPciArch {
     /// @brief 读取寄存器值，x86_64架构通过读取两个特定io端口实现

kernel/src/arch/x86_64/asm/mod.rs

@@ -1,2 +1,3 @@
 pub mod bitops;
 pub mod irqflags;
+pub mod pio;

kernel/src/arch/x86_64/asm/pio.rs

@@ -0,0 +1,35 @@
+use crate::arch::io::PortIOArch;
+
+pub struct X86_64PortIOArch;
+
+impl PortIOArch for X86_64PortIOArch {
+    #[inline(always)]
+    unsafe fn in8(port: u16) -> u8 {
+        x86::io::inb(port)
+    }
+
+    #[inline(always)]
+    unsafe fn in16(port: u16) -> u16 {
+        x86::io::inw(port)
+    }
+
+    #[inline(always)]
+    unsafe fn in32(port: u16) -> u32 {
+        x86::io::inl(port)
+    }
+
+    #[inline(always)]
+    unsafe fn out8(port: u16, data: u8) {
+        x86::io::outb(port, data)
+    }
+
+    #[inline(always)]
+    unsafe fn out16(port: u16, data: u16) {
+        x86::io::outw(port, data)
+    }
+
+    #[inline(always)]
+    unsafe fn out32(port: u16, data: u32) {
+        x86::io::outl(port, data)
+    }
+}

kernel/src/arch/x86_64/mm/mod.rs

@@ -5,7 +5,7 @@ use hashbrown::HashSet;
 use x86::time::rdtsc;
 use x86_64::registers::model_specific::EferFlags;
 
-use crate::driver::uart::uart_device::c_uart_send_str;
+use crate::driver::tty::serial::serial8250::send_to_default_serial8250_port;
 use crate::include::bindings::bindings::{
     multiboot2_get_memory, multiboot2_iter, multiboot_mmap_entry_t,
 };
@@ -148,7 +148,7 @@ impl MemoryManagementArch for X86_64MMArch {
         // 初始化物理内存区域(从multiboot2中获取)
         let areas_count =
             Self::init_memory_area_from_multiboot2().expect("init memory area failed");
-        c_uart_send_str(0x3f8, "x86 64 init end\n\0".as_ptr());
+        send_to_default_serial8250_port("x86 64 init end\n\0".as_bytes());
 
         return &PHYS_MEMORY_AREAS[0..areas_count];
     }
@@ -229,7 +229,7 @@ impl X86_64MMArch {
     unsafe fn init_memory_area_from_multiboot2() -> Result<usize, SystemError> {
         // 这个数组用来存放内存区域的信息（从C获取）
         let mut mb2_mem_info: [multiboot_mmap_entry_t; 512] = mem::zeroed();
-        c_uart_send_str(0x3f8, "init_memory_area_from_multiboot2 begin\n\0".as_ptr());
+        send_to_default_serial8250_port("init_memory_area_from_multiboot2 begin\n\0".as_bytes());
 
         let mut mb2_count: u32 = 0;
         multiboot2_iter(
@@ -237,7 +237,7 @@ impl X86_64MMArch {
             &mut mb2_mem_info as *mut [multiboot_mmap_entry_t; 512] as usize as *mut c_void,
             &mut mb2_count,
         );
-        c_uart_send_str(0x3f8, "init_memory_area_from_multiboot2 2\n\0".as_ptr());
+        send_to_default_serial8250_port("init_memory_area_from_multiboot2 2\n\0".as_bytes());
 
         let mb2_count = mb2_count as usize;
         let mut areas_count = 0usize;
@@ -255,7 +255,7 @@ impl X86_64MMArch {
                 areas_count += 1;
             }
         }
-        c_uart_send_str(0x3f8, "init_memory_area_from_multiboot2 end\n\0".as_ptr());
+        send_to_default_serial8250_port("init_memory_area_from_multiboot2 end\n\0".as_bytes());
         kinfo!("Total memory size: {} MB, total areas from multiboot2: {mb2_count}, valid areas: {areas_count}", total_mem_size / 1024 / 1024);
 
         return Ok(areas_count);
@@ -291,7 +291,7 @@ impl VirtAddr {
 
 /// @brief 初始化内存管理模块
 pub fn mm_init() {
-    c_uart_send_str(0x3f8, "mm_init\n\0".as_ptr());
+    send_to_default_serial8250_port("mm_init\n\0".as_bytes());
     PrintkWriter
         .write_fmt(format_args!("mm_init() called\n"))
         .unwrap();
@@ -301,7 +301,7 @@ pub fn mm_init() {
         .compare_exchange(false, true, Ordering::SeqCst, Ordering::SeqCst)
         .is_err()
     {
-        c_uart_send_str(0x3f8, "mm_init err\n\0".as_ptr());
+        send_to_default_serial8250_port("mm_init err\n\0".as_bytes());
         panic!("mm_init() can only be called once");
     }
 

kernel/src/arch/x86_64/mod.rs

@@ -20,3 +20,5 @@ pub use self::pci::pci::X86_64PciArch as PciArch;
 pub use self::mm::X86_64MMArch as MMArch;
 
 pub use interrupt::X86_64InterruptArch as CurrentIrqArch;
+
+pub use crate::arch::asm::pio::X86_64PortIOArch as CurrentPortIOArch;

kernel/src/driver/acpi/bus.rs

@@ -0,0 +1,23 @@
+use alloc::sync::Arc;
+
+use crate::{
+    driver::base::device::{driver::Driver, Device},
+    syscall::SystemError,
+};
+
+use super::AcpiManager;
+
+impl AcpiManager {
+    /// 通过acpi来匹配驱动
+    ///
+    /// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/drivers/acpi/bus.c#949
+    pub fn driver_match_device(
+        &self,
+        _driver: &Arc<dyn Driver>,
+        _device: &Arc<dyn Device>,
+    ) -> Result<bool, SystemError> {
+        // todo:
+
+        return Ok(false);
+    }
+}

kernel/src/driver/acpi/mod.rs

@@ -14,6 +14,7 @@ use crate::{
     },
 };
 
+pub mod bus;
 mod c_adapter;
 pub mod glue;
 pub mod old;
@@ -22,6 +23,11 @@ extern crate acpi;
 
 static mut __ACPI_TABLE: Option<acpi::AcpiTables<AcpiHandlerImpl>> = None;
 
+#[inline(always)]
+pub fn acpi_manager() -> &'static AcpiManager {
+    &AcpiManager
+}
+
 #[derive(Debug)]
 pub struct AcpiManager;
 

kernel/src/driver/base/device/bus.rs

@@ -1,8 +1,19 @@
-use super::{sys_devices_kset, Device, DeviceMatchName, DeviceMatcher, DeviceState};
+use super::{
+    driver::{Driver, DriverMatchName, DriverMatcher},
+    sys_devices_kset, Device, DeviceMatchName, DeviceMatcher, DeviceState,
+};
 use crate::{
-    driver::base::{device::device_manager, kobject::KObject, kset::KSet, subsys::SubSysPrivate},
+    driver::base::{
+        device::{device_manager, driver::driver_manager},
+        kobject::{KObjType, KObject, KObjectManager},
+        kset::KSet,
+        subsys::SubSysPrivate,
+    },
     filesystem::{
-        sysfs::{file::sysfs_emit_str, sysfs_instance, Attribute, AttributeGroup, SysFSOpsSupport},
+        sysfs::{
+            file::sysfs_emit_str, sysfs_instance, Attribute, AttributeGroup, SysFSOps,
+            SysFSOpsSupport,
+        },
         vfs::syscall::ModeType,
     },
     libs::rwlock::RwLock,
@@ -14,6 +25,7 @@ use alloc::{
 };
 use core::{ffi::CStr, fmt::Debug, intrinsics::unlikely};
 use hashbrown::HashMap;
+use intertrait::cast::CastArc;
 
 /// `/sys/bus`的kset
 static mut BUS_KSET_INSTANCE: Option<Arc<KSet>> = None;
@@ -105,6 +117,46 @@ pub trait Bus: Debug + Send + Sync {
         &[]
     }
 
+    /// 检查设备是否可以被总线绑定，如果可以，就绑定它们。
+    /// 绑定之后,device的driver字段会被设置为驱动实例。
+    ///
+    /// ## 参数
+    ///
+    /// - `device` - 设备实例
+    ///
+    /// ## 默认实现
+    ///
+    /// 如果总线不支持该操作，返回`SystemError::EOPNOTSUPP_OR_ENOTSUP`
+    fn probe(&self, _device: &Arc<dyn Device>) -> Result<(), SystemError> {
+        return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
+    }
+    fn remove(&self, _device: &Arc<dyn Device>) -> Result<(), SystemError>;
+    fn sync_state(&self, _device: &Arc<dyn Device>) {}
+    fn shutdown(&self, _device: &Arc<dyn Device>);
+    fn suspend(&self, _device: &Arc<dyn Device>) {
+        // todo: implement suspend
+    }
+
+    fn resume(&self, device: &Arc<dyn Device>) -> Result<(), SystemError>;
+
+    /// match platform device to platform driver.
+    ///
+    /// ## 参数
+    ///
+    /// * `device` - platform device
+    /// * `driver` - platform driver
+    ///
+    /// ## 返回
+    ///
+    /// - `Ok(true)` - 匹配成功
+    /// - `Ok(false)` - 匹配失败
+    /// - `Err(_)` - 由于内部错误导致匹配失败
+    fn match_device(
+        &self,
+        device: &Arc<dyn Device>,
+        driver: &Arc<dyn Driver>,
+    ) -> Result<bool, SystemError>;
+
     fn subsystem(&self) -> &SubSysPrivate;
 
     /// 对当前总线操作的时候需要获取父级总线的锁
@@ -126,7 +178,7 @@ impl dyn Bus {
         data: T,
     ) -> Option<Arc<dyn Device>> {
         let subsys = self.subsystem();
-        let guard = subsys.devices().read();
+        let guard = subsys.devices();
         for dev in guard.iter() {
             let dev = dev.upgrade();
             if let Some(dev) = dev {
@@ -146,6 +198,35 @@ impl dyn Bus {
     pub fn find_device_by_name(&self, name: &str) -> Option<Arc<dyn Device>> {
         return self.find_device(&DeviceMatchName, name);
     }
+
+    /// 在bus上,根据条件寻找一个特定的驱动
+    ///
+    /// ## 参数
+    ///
+    /// - `matcher` - 匹配器
+    /// - `data` - 传给匹配器的数据
+    pub fn find_driver<T: Copy>(
+        &self,
+        matcher: &dyn DriverMatcher<T>,
+        data: T,
+    ) -> Option<Arc<dyn Driver>> {
+        let subsys = self.subsystem();
+        let guard = subsys.drivers();
+        for drv in guard.iter() {
+            let drv = drv.upgrade();
+            if let Some(drv) = drv {
+                if matcher.match_driver(&drv, data) {
+                    return Some(drv.clone());
+                }
+            }
+        }
+        return None;
+    }
+
+    /// 根据名称在bus上匹配驱动
+    pub fn find_driver_by_name(&self, name: &str) -> Option<Arc<dyn Driver>> {
+        return self.find_driver(&DriverMatchName, name);
+    }
 }
 
 /// @brief: 总线管理结构体
@@ -162,6 +243,94 @@ impl BusManager {
         };
     }
 
+    /// 把一个设备添加到总线上
+    ///
+    /// ## 描述
+    ///
+    /// - 添加一个设备的与bus相关的属性
+    /// - 在bus和设备文件夹下，创建软链接
+    /// - 把设备添加到它的总线的设备列表中
+    ///
+    /// 参考： https://opengrok.ringotek.cn/xref/linux-6.1.9/drivers/base/bus.c?fi=bus_add_device#441
+    ///
+    /// ## 参数
+    ///
+    /// - `dev` - 要被添加的设备
+    pub fn add_device(&self, dev: &Arc<dyn Device>) -> Result<(), SystemError> {
+        let bus = dev.bus();
+        if let Some(bus) = bus {
+            device_manager().add_groups(dev, bus.dev_groups())?;
+
+            // 增加符号链接
+            let bus_devices_kset = bus
+                .subsystem()
+                .devices_kset()
+                .expect("bus devices kset is none, maybe bus is not registered");
+            let dev_kobj = dev.clone() as Arc<dyn KObject>;
+
+            sysfs_instance().create_link(
+                Some(&bus_devices_kset.as_kobject()),
+                &dev_kobj,
+                dev.name(),
+            )?;
+            sysfs_instance().create_link(
+                Some(&dev_kobj),
+                &(&bus.subsystem().subsys().as_kobject()),
+                "subsystem".to_string(),
+            )?;
+            bus.subsystem().add_device_to_vec(dev)?;
+        }
+        return Ok(());
+    }
+
+    /// 在总线上添加一个驱动
+    ///
+    /// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/drivers/base/bus.c?fi=bus_add_driver#590
+    pub fn add_driver(&self, driver: &Arc<dyn Driver>) -> Result<(), SystemError> {
+        let bus = driver.bus().ok_or(SystemError::EINVAL)?;
+        kdebug!("bus '{}' add driver '{}'", bus.name(), driver.name());
+
+        driver.set_kobj_type(Some(&BusDriverKType));
+        let kobj = driver.clone() as Arc<dyn KObject>;
+        KObjectManager::add_kobj(kobj, bus.subsystem().drivers_kset())?;
+
+        bus.subsystem().add_driver_to_vec(driver)?;
+        if bus.subsystem().drivers_autoprobe() {
+            let r = driver_manager().driver_attach(driver);
+            if let Err(e) = r {
+                bus.subsystem().remove_driver_from_vec(driver);
+                return Err(e);
+            }
+        }
+
+        driver_manager()
+            .add_groups(driver, bus.drv_groups())
+            .or_else(|e| {
+                kerror!(
+                    "BusManager::add_driver: driver '{:?}' add_groups failed, err: '{:?}",
+                    driver.name(),
+                    e
+                );
+                Err(e)
+            })
+            .ok();
+
+        if !driver.suppress_bind_attrs() {
+            self.add_bind_files(driver)
+                .or_else(|e| {
+                    kerror!(
+                        "BusManager::add_driver: driver '{:?}' add_bind_files failed, err: '{:?}",
+                        driver.name(),
+                        e
+                    );
+                    Err(e)
+                })
+                .ok();
+        }
+
+        return Ok(());
+    }
+
     ///
     /// bus_register - register a driver-core subsystem
     ///
@@ -257,7 +426,7 @@ impl BusManager {
     /// - `bus` - bus实例
     #[allow(dead_code)]
     pub fn rescan_devices(&self, bus: &Arc<dyn Bus>) -> Result<(), SystemError> {
-        for dev in bus.subsystem().devices().read().iter() {
+        for dev in bus.subsystem().devices().iter() {
             let dev = dev.upgrade();
             if let Some(dev) = dev {
                 rescan_devices_helper(dev)?;
@@ -283,21 +452,32 @@ impl BusManager {
         }
     }
 
-    /// 在bus上,根据条件寻找一个特定的设备
+    /// 从总线上移除一个驱动
+    ///
+    /// Detach the driver from the devices it controls, and remove
+    /// it from its bus's list of drivers. Finally, we drop the reference
+    /// to the bus.
     ///
     /// ## 参数
     ///
-    /// - `matcher` - 匹配器
-    /// - `data` - 传给匹配器的数据
-    #[inline]
-    #[allow(dead_code)]
-    pub fn find_device<T: Copy>(
-        &self,
-        bus: &Arc<dyn Bus>,
-        matcher: &dyn DeviceMatcher<T>,
-        data: T,
-    ) -> Option<Arc<dyn Device>> {
-        return bus.find_device(matcher, data);
+    /// - `driver` - 驱动实例
+    ///
+    /// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/drivers/base/bus.c?fi=bus_remove_driver#666
+    pub fn remove_driver(&self, _driver: &Arc<dyn Driver>) {
+        todo!("BusManager::remove_driver")
+    }
+
+    fn add_bind_files(&self, driver: &Arc<dyn Driver>) -> Result<(), SystemError> {
+        driver_manager().create_attr_file(driver, &DriverAttrUnbind)?;
+
+        driver_manager()
+            .create_attr_file(driver, &DriverAttrBind)
+            .map_err(|e| {
+                driver_manager().remove_attr_file(driver, &DriverAttrUnbind);
+                e
+            })?;
+
+        return Ok(());
     }
 }
 
@@ -376,13 +556,7 @@ pub fn buses_init() -> Result<(), SystemError> {
 ///
 /// - `dev` - 要被添加的设备
 pub fn bus_add_device(dev: &Arc<dyn Device>) -> Result<(), SystemError> {
-    let bus = dev.bus();
-    if let Some(bus) = bus {
-        device_manager().add_groups(dev, bus.dev_groups())?;
-        // todo: 增加符号链接
-        todo!("bus_add_device")
-    }
-    return Ok(());
+    return bus_manager().add_device(dev);
 }
 
 /// 自动为设备在总线上寻找可用的驱动程序
@@ -507,3 +681,129 @@ pub enum BusNotifyEvent {
     /// 驱动绑定失败
     DriverNotBound,
 }
+
+#[derive(Debug)]
+struct BusDriverKType;
+
+impl KObjType for BusDriverKType {
+    fn sysfs_ops(&self) -> Option<&dyn SysFSOps> {
+        Some(&BusDriverSysFSOps)
+    }
+
+    fn attribute_groups(&self) -> Option<&'static [&'static dyn AttributeGroup]> {
+        None
+    }
+}
+
+#[derive(Debug)]
+struct BusDriverSysFSOps;
+
+impl SysFSOps for BusDriverSysFSOps {
+    #[inline]
+    fn show(
+        &self,
+        kobj: Arc<dyn KObject>,
+        attr: &dyn Attribute,
+        buf: &mut [u8],
+    ) -> Result<usize, SystemError> {
+        attr.show(kobj, buf)
+    }
+
+    #[inline]
+    fn store(
+        &self,
+        kobj: Arc<dyn KObject>,
+        attr: &dyn Attribute,
+        buf: &[u8],
+    ) -> Result<usize, SystemError> {
+        attr.store(kobj, buf)
+    }
+}
+
+#[derive(Debug)]
+struct DriverAttrUnbind;
+
+impl Attribute for DriverAttrUnbind {
+    fn mode(&self) -> ModeType {
+        ModeType::from_bits_truncate(0o200)
+    }
+
+    fn name(&self) -> &str {
+        "unbind"
+    }
+
+    fn store(&self, kobj: Arc<dyn KObject>, buf: &[u8]) -> Result<usize, SystemError> {
+        let driver = kobj.cast::<dyn Driver>().map_err(|kobj| {
+            kerror!(
+                "Intertrait casting not implemented for kobj: {}",
+                kobj.name()
+            );
+            SystemError::EOPNOTSUPP_OR_ENOTSUP
+        })?;
+
+        let bus = driver.bus().ok_or(SystemError::ENODEV)?;
+
+        let s = CStr::from_bytes_with_nul(buf)
+            .map_err(|_| SystemError::EINVAL)?
+            .to_str()
+            .map_err(|_| SystemError::EINVAL)?;
+        let dev = bus.find_device_by_name(s).ok_or(SystemError::ENODEV)?;
+        let p = dev.driver().ok_or(SystemError::ENODEV)?;
+        if Arc::ptr_eq(&p, &driver) {
+            device_manager().device_driver_detach(&dev);
+            return Ok(buf.len());
+        }
+        return Err(SystemError::ENODEV);
+    }
+
+    fn support(&self) -> SysFSOpsSupport {
+        SysFSOpsSupport::STORE
+    }
+}
+
+#[derive(Debug)]
+struct DriverAttrBind;
+
+impl Attribute for DriverAttrBind {
+    fn name(&self) -> &str {
+        "bind"
+    }
+
+    fn mode(&self) -> ModeType {
+        ModeType::from_bits_truncate(0o200)
+    }
+
+    /*
+     * Manually attach a device to a driver.
+     * Note: the driver must want to bind to the device,
+     * it is not possible to override the driver's id table.
+     */
+    fn store(&self, kobj: Arc<dyn KObject>, buf: &[u8]) -> Result<usize, SystemError> {
+        let driver = kobj.cast::<dyn Driver>().map_err(|kobj| {
+            kerror!(
+                "Intertrait casting not implemented for kobj: {}",
+                kobj.name()
+            );
+            SystemError::EOPNOTSUPP_OR_ENOTSUP
+        })?;
+
+        let bus = driver.bus().ok_or(SystemError::ENODEV)?;
+        let device = bus
+            .find_device_by_name(
+                CStr::from_bytes_with_nul(buf)
+                    .map_err(|_| SystemError::EINVAL)?
+                    .to_str()
+                    .map_err(|_| SystemError::EINVAL)?,
+            )
+            .ok_or(SystemError::ENODEV)?;
+
+        if driver_manager().match_device(&driver, &device)? {
+            device_manager().device_driver_attach(&driver, &device)?;
+            return Ok(buf.len());
+        }
+        return Err(SystemError::ENODEV);
+    }
+    fn support(&self) -> SysFSOpsSupport {
+        SysFSOpsSupport::STORE
+    }
+}

kernel/src/driver/base/device/dd.rs

@@ -1,10 +1,26 @@
 use core::intrinsics::unlikely;
 
-use alloc::sync::Arc;
+use alloc::{string::ToString, sync::Arc};
+use intertrait::cast::CastArc;
 
-use crate::{driver::Driver, syscall::SystemError};
+use crate::{
+    driver::base::kobject::KObject,
+    filesystem::{
+        sysfs::{file::sysfs_emit_str, sysfs_instance, Attribute, SysFSOpsSupport},
+        vfs::syscall::ModeType,
+    },
+    libs::wait_queue::WaitQueue,
+    syscall::SystemError,
+};
 
-use super::{bus::BusNotifyEvent, driver::driver_manager, Device, DeviceManager};
+use super::{
+    bus::BusNotifyEvent,
+    device_manager,
+    driver::{driver_manager, Driver, DriverManager},
+    Device, DeviceManager,
+};
+
+static PROBE_WAIT_QUEUE: WaitQueue = WaitQueue::INIT;
 
 impl DeviceManager {
     /// 尝试把一个设备与一个驱动匹配
@@ -40,7 +56,8 @@ impl DeviceManager {
         allow_async: bool,
     ) -> Result<bool, SystemError> {
         if unlikely(allow_async) {
-            todo!("do_device_attach: allow_async")
+            // todo!("do_device_attach: allow_async")
+            kwarn!("do_device_attach: allow_async is true, but currently not supported");
         }
         if dev.is_dead() {
             return Ok(false);
@@ -64,7 +81,7 @@ impl DeviceManager {
             let bus = dev.bus().ok_or(SystemError::EINVAL)?;
             let mut data = DeviceAttachData::new(dev.clone(), allow_async, false);
             let mut flag = true;
-            for driver in bus.subsystem().drivers().read().iter() {
+            for driver in bus.subsystem().drivers().iter() {
                 if let Some(driver) = driver.upgrade() {
                     let r = self.do_device_attach_driver(&driver, &mut data);
                     if unlikely(r.is_err()) {
@@ -142,7 +159,7 @@ impl DeviceManager {
         let r = driver_manager().driver_sysfs_add(dev);
         if let Err(e) = r {
             self.device_links_force_bind(dev);
-            self.driver_bound(dev);
+            driver_manager().driver_bound(dev);
             return Err(e);
         } else {
             if let Some(bus) = dev.bus() {
@@ -156,9 +173,10 @@ impl DeviceManager {
         return r;
     }
 
-    /// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/drivers/base/dd.c#393
-    fn driver_bound(&self, _dev: &Arc<dyn Device>) {
-        todo!("driver_bound")
+    /// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/drivers/base/dd.c?fi=driver_attach#528
+    fn unbind_cleanup(&self, dev: &Arc<dyn Device>) {
+        dev.set_driver(None);
+        // todo: 添加更多操作，清理数据
     }
 }
 
@@ -208,3 +226,368 @@ impl DeviceAttachData {
         self.have_async = true;
     }
 }
+
+impl DriverManager {
+    /// 尝试把驱动绑定到现有的设备上
+    ///
+    /// 这个函数会遍历驱动现有的全部设备，然后尝试把他们匹配。
+    /// 一旦有一个设备匹配成功，就会返回，并且设备的driver字段会被设置。
+    pub fn driver_attach(&self, driver: &Arc<dyn Driver>) -> Result<(), SystemError> {
+        let bus = driver.bus().ok_or(SystemError::EINVAL)?;
+        for dev in bus.subsystem().devices().iter() {
+            if let Some(dev) = dev.upgrade() {
+                if self.do_driver_attach(&dev, &driver) {
+                    // 匹配成功
+                    return Ok(());
+                }
+            }
+        }
+
+        return Ok(());
+    }
+
+    /// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/drivers/base/dd.c?fi=driver_attach#1134
+    fn do_driver_attach(&self, device: &Arc<dyn Device>, driver: &Arc<dyn Driver>) -> bool {
+        let r = self.match_device(driver, device).unwrap_or(false);
+        if r == false {
+            // 不匹配
+            return false;
+        }
+
+        if driver.allows_async_probing() {
+            unimplemented!(
+                "do_driver_attach: probe driver '{}' asynchronously",
+                driver.name()
+            );
+        }
+
+        if self.probe_device(driver, device).is_err() {
+            return false;
+        }
+
+        return true;
+    }
+
+    #[inline(always)]
+    pub fn match_device(
+        &self,
+        driver: &Arc<dyn Driver>,
+        device: &Arc<dyn Device>,
+    ) -> Result<bool, SystemError> {
+        return driver.bus().unwrap().match_device(device, driver);
+    }
+
+    /// 尝试把设备和驱动绑定在一起
+    ///
+    ///
+    /// ## 返回
+    ///
+    /// - Ok(): 绑定成功
+    /// - Err(ENODEV): 设备未注册
+    /// - Err(EBUSY): 设备已经绑定到驱动上
+    ///
+    /// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/drivers/base/dd.c?fi=driver_attach#802
+    fn probe_device(
+        &self,
+        driver: &Arc<dyn Driver>,
+        device: &Arc<dyn Device>,
+    ) -> Result<(), SystemError> {
+        let r = self.do_probe_device(driver, device);
+        PROBE_WAIT_QUEUE.wakeup_all(None);
+        return r;
+    }
+
+    fn do_probe_device(
+        &self,
+        driver: &Arc<dyn Driver>,
+        device: &Arc<dyn Device>,
+    ) -> Result<(), SystemError> {
+        if device.is_dead() || (!device.is_registered()) {
+            return Err(SystemError::ENODEV);
+        }
+        if device.driver().is_some() {
+            return Err(SystemError::EBUSY);
+        }
+
+        device.set_can_match(true);
+
+        self.really_probe(driver, device)?;
+
+        return Ok(());
+    }
+
+    /// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/drivers/base/dd.c?fi=driver_attach#584
+    fn really_probe(
+        &self,
+        driver: &Arc<dyn Driver>,
+        device: &Arc<dyn Device>,
+    ) -> Result<(), SystemError> {
+        let bind_failed = || {
+            device_manager().unbind_cleanup(device);
+        };
+
+        let sysfs_failed = || {
+            if let Some(bus) = device.bus() {
+                bus.subsystem().bus_notifier().call_chain(
+                    BusNotifyEvent::DriverNotBound,
+                    Some(device),
+                    None,
+                );
+            }
+        };
+
+        let probe_failed = || {
+            self.remove_from_sysfs(device);
+        };
+
+        let dev_groups_failed = || {
+            device_manager().remove(device);
+        };
+
+        device.set_driver(Some(Arc::downgrade(driver)));
+
+        self.add_to_sysfs(device).map_err(|e| {
+            kerror!(
+                "really_probe: add_to_sysfs failed, dev: '{}', err: {:?}",
+                device.name(),
+                e
+            );
+            sysfs_failed();
+            bind_failed();
+            e
+        })?;
+
+        self.call_driver_probe(device, driver).map_err(|e| {
+            kerror!(
+                "really_probe: call_driver_probe failed, dev: '{}', err: {:?}",
+                device.name(),
+                e
+            );
+
+            probe_failed();
+            sysfs_failed();
+            bind_failed();
+            e
+        })?;
+
+        device_manager()
+            .add_groups(device, driver.dev_groups())
+            .map_err(|e| {
+                kerror!(
+                    "really_probe: add_groups failed, dev: '{}', err: {:?}",
+                    device.name(),
+                    e
+                );
+                dev_groups_failed();
+                probe_failed();
+                sysfs_failed();
+                bind_failed();
+                e
+            })?;
+
+        // 我们假设所有的设备都有sync_state这个属性。如果没有的话，也创建属性文件。
+        device_manager()
+            .create_file(device, &DeviceAttrStateSynced)
+            .map_err(|e| {
+                kerror!(
+                    "really_probe: create_file failed, dev: '{}', err: {:?}",
+                    device.name(),
+                    e
+                );
+                dev_groups_failed();
+                probe_failed();
+                sysfs_failed();
+                bind_failed();
+                e
+            })?;
+
+        self.driver_bound(device);
+
+        return Ok(());
+    }
+
+    /// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/drivers/base/dd.c?fi=driver_attach#434
+    fn add_to_sysfs(&self, device: &Arc<dyn Device>) -> Result<(), SystemError> {
+        let driver = device.driver().ok_or(SystemError::EINVAL)?;
+
+        if let Some(bus) = device.bus() {
+            bus.subsystem().bus_notifier().call_chain(
+                BusNotifyEvent::BindDriver,
+                Some(&device),
+                None,
+            );
+        }
+
+        let driver_kobj = driver.clone() as Arc<dyn KObject>;
+        let device_kobj = device.clone() as Arc<dyn KObject>;
+
+        sysfs_instance().create_link(Some(&driver_kobj), &device_kobj, device.name())?;
+
+        let fail_rm_dev_link = || {
+            sysfs_instance().remove_link(&driver_kobj, device.name());
+        };
+
+        sysfs_instance()
+            .create_link(Some(&device_kobj), &driver_kobj, "driver".to_string())
+            .map_err(|e| {
+                fail_rm_dev_link();
+                e
+            })?;
+
+        device_manager()
+            .create_file(device, &DeviceAttrCoredump)
+            .map_err(|e| {
+                sysfs_instance().remove_link(&device_kobj, "driver".to_string());
+                fail_rm_dev_link();
+                e
+            })?;
+
+        return Ok(());
+    }
+
+    /// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/drivers/base/dd.c?fi=driver_attach#469
+    fn remove_from_sysfs(&self, _device: &Arc<dyn Device>) {
+        todo!("remove_from_sysfs")
+    }
+
+    fn call_driver_probe(
+        &self,
+        device: &Arc<dyn Device>,
+        driver: &Arc<dyn Driver>,
+    ) -> Result<(), SystemError> {
+        let bus = device.bus().ok_or(SystemError::EINVAL)?;
+        let r = bus.probe(device);
+        if r == Err(SystemError::EOPNOTSUPP_OR_ENOTSUP) {
+            kerror!(
+                "call_driver_probe: bus.probe() failed, dev: '{}', err: {:?}",
+                device.name(),
+                r
+            );
+            return r;
+        }
+
+        if r.is_ok() {
+            return Ok(());
+        }
+
+        let err = r.unwrap_err();
+        match err {
+            SystemError::ENODEV | SystemError::ENXIO => {
+                kdebug!(
+                    "driver'{}': probe of {} rejects match {:?}",
+                    driver.name(),
+                    device.name(),
+                    err
+                );
+            }
+
+            _ => {
+                kwarn!(
+                    "driver'{}': probe of {} failed with error {:?}",
+                    driver.name(),
+                    device.name(),
+                    err
+                );
+            }
+        }
+
+        return Err(err);
+    }
+
+    /// 当设备被成功探测，进行了'设备->驱动'绑定后，调用这个函数，完成'驱动->设备'的绑定
+    /// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/drivers/base/dd.c#393
+    fn driver_bound(&self, device: &Arc<dyn Device>) {
+        if self.driver_is_bound(device) {
+            kwarn!("driver_bound: device '{}' is already bound.", device.name());
+            return;
+        }
+
+        let driver = device.driver().unwrap();
+        driver.add_device(device.clone());
+
+        if let Some(bus) = device.bus() {
+            bus.subsystem().bus_notifier().call_chain(
+                BusNotifyEvent::BoundDriver,
+                Some(device),
+                None,
+            );
+        }
+
+        // todo: 发送kobj bind的uevent
+    }
+
+    fn driver_is_bound(&self, device: &Arc<dyn Device>) -> bool {
+        if let Some(driver) = device.driver() {
+            if driver.find_device_by_name(&device.name()).is_some() {
+                return true;
+            }
+        }
+
+        return false;
+    }
+}
+
+/// 设备文件夹下的`dev`文件的属性
+#[derive(Debug, Clone, Copy)]
+pub struct DeviceAttrStateSynced;
+
+impl Attribute for DeviceAttrStateSynced {
+    fn mode(&self) -> ModeType {
+        // 0o444
+        return ModeType::S_IRUGO;
+    }
+
+    fn name(&self) -> &str {
+        "state_synced"
+    }
+
+    fn show(&self, kobj: Arc<dyn KObject>, buf: &mut [u8]) -> Result<usize, SystemError> {
+        let dev = kobj.cast::<dyn Device>().map_err(|kobj| {
+            kerror!(
+                "Intertrait casting not implemented for kobj: {}",
+                kobj.name()
+            );
+            SystemError::EOPNOTSUPP_OR_ENOTSUP
+        })?;
+
+        let val = dev.state_synced();
+        let val = if val { 1 } else { 0 };
+        return sysfs_emit_str(buf, format!("{}\n", val).as_str());
+    }
+
+    fn support(&self) -> SysFSOpsSupport {
+        SysFSOpsSupport::SHOW
+    }
+}
+
+#[derive(Debug)]
+struct DeviceAttrCoredump;
+
+impl Attribute for DeviceAttrCoredump {
+    fn name(&self) -> &str {
+        "coredump"
+    }
+
+    fn mode(&self) -> ModeType {
+        ModeType::from_bits_truncate(0o200)
+    }
+
+    fn support(&self) -> SysFSOpsSupport {
+        SysFSOpsSupport::STORE
+    }
+
+    fn store(&self, kobj: Arc<dyn KObject>, buf: &[u8]) -> Result<usize, SystemError> {
+        let dev = kobj.cast::<dyn Device>().map_err(|kobj| {
+            kerror!(
+                "Intertrait casting not implemented for kobj: {}",
+                kobj.name()
+            );
+            SystemError::EOPNOTSUPP_OR_ENOTSUP
+        })?;
+
+        let drv = dev.driver().ok_or(SystemError::EINVAL)?;
+        drv.coredump(&dev)?;
+
+        return Ok(buf.len());
+    }
+}

kernel/src/driver/base/device/driver.rs

@@ -1,6 +1,13 @@
-use super::Device;
-use crate::syscall::SystemError;
-use alloc::sync::Arc;
+use super::{
+    bus::{bus_manager, Bus},
+    Device, DeviceMatchName, DeviceMatcher, IdTable,
+};
+use crate::{
+    driver::base::kobject::KObject,
+    filesystem::sysfs::{sysfs_instance, Attribute, AttributeGroup},
+    syscall::SystemError,
+};
+use alloc::{sync::Arc, vec::Vec};
 use core::fmt::Debug;
 
 /// @brief: Driver error
@@ -31,13 +38,278 @@ pub fn driver_manager() -> &'static DriverManager {
     &DriverManager
 }
 
+/// 驱动程序应当实现的trait
+///
+/// ## 注意
+///
+/// 由于设备驱动模型需要从Arc<dyn KObject>转换为Arc<dyn Driver>，
+/// 因此，所有的实现了 Driver trait的结构体，都应该在结构体上方标注`#[cast_to([sync] Driver)]`，
+/// 否则在运行时会报错
+pub trait Driver: Sync + Send + Debug + KObject {
+    fn coredump(&self, _device: &Arc<dyn Device>) -> Result<(), SystemError> {
+        Err(SystemError::EOPNOTSUPP_OR_ENOTSUP)
+    }
+
+    /// @brief: 获取驱动标识符
+    /// @parameter: None
+    /// @return: 该驱动驱动唯一标识符
+    fn id_table(&self) -> Option<IdTable>;
+
+    fn devices(&self) -> Vec<Arc<dyn Device>>;
+
+    /// 把设备加入当前驱动管理的列表中
+    fn add_device(&self, device: Arc<dyn Device>);
+
+    /// 从当前驱动管理的列表中删除设备
+    fn delete_device(&self, device: &Arc<dyn Device>);
+
+    /// 根据设备名称查找绑定到驱动的设备
+    ///
+    /// 该方法是一个快速查找方法，要求驱动开发者自行实现。
+    ///
+    /// 如果开发者没有实现该方法，则应当返回None
+    ///
+    /// ## 注意
+    ///
+    /// 这是一个内部方法，不应当被外部调用，若要查找设备，请使用`find_device_by_name()`
+    fn __find_device_by_name_fast(&self, _name: &str) -> Option<Arc<dyn Device>> {
+        None
+    }
+
+    /// 是否禁用sysfs的bind/unbind属性
+    ///
+    /// ## 返回
+    ///
+    /// - true: 禁用
+    /// - false: 不禁用（默认）
+    fn suppress_bind_attrs(&self) -> bool {
+        false
+    }
+
+    fn bus(&self) -> Option<Arc<dyn Bus>> {
+        None
+    }
+
+    fn set_bus(&self, bus: Option<Arc<dyn Bus>>);
+
+    fn groups(&self) -> &'static [&'static dyn AttributeGroup] {
+        &[]
+    }
+
+    fn dev_groups(&self) -> &'static [&'static dyn AttributeGroup] {
+        &[]
+    }
+
+    /// 使用什么样的策略来探测设备
+    fn probe_type(&self) -> DriverProbeType {
+        DriverProbeType::DefaultStrategy
+    }
+}
+
+impl dyn Driver {
+    pub fn allows_async_probing(&self) -> bool {
+        match self.probe_type() {
+            DriverProbeType::PreferAsync => true,
+            DriverProbeType::ForceSync => false,
+            DriverProbeType::DefaultStrategy => {
+                // todo: 判断是否请求异步探测，如果是的话，就返回true
+
+                // 由于目前还没有支持异步探测，因此这里暂时返回false
+                false
+            }
+        }
+    }
+
+    /// 根据条件寻找一个绑定到这个驱动的设备(低效实现)
+    ///
+    /// ## 参数
+    ///
+    /// - `matcher` - 匹配器
+    /// - `data` - 传给匹配器的数据
+    ///
+    /// ## 注意
+    ///
+    /// 这里的默认实现很低效，请为特定的驱动自行实现高效的查询
+    fn find_device_slow<T: Copy>(
+        &self,
+        matcher: &dyn DeviceMatcher<T>,
+        data: T,
+    ) -> Option<Arc<dyn Device>> {
+        for dev in self.devices() {
+            if matcher.match_device(&dev, data) {
+                return Some(dev);
+            }
+        }
+
+        return None;
+    }
+
+    /// 根据设备名称查找绑定到驱动的设备
+    ///
+    /// ## 注意
+    ///
+    /// 这里的默认实现很低效，请为特定的驱动自行实现高效的查询
+    pub fn find_device_by_name(&self, name: &str) -> Option<Arc<dyn Device>> {
+        if let Some(r) = self.__find_device_by_name_fast(name) {
+            return Some(r);
+        }
+
+        return self.find_device_slow(&DeviceMatchName, name);
+    }
+}
+
 /// @brief: 驱动管理器
 #[derive(Debug, Clone)]
 pub struct DriverManager;
 
 impl DriverManager {
+    /// 注册设备驱动。该设备驱动应当已经设置好其bus字段
+    ///
+    /// ## 参数
+    ///
+    /// - driver: 驱动
+    ///
+    /// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/drivers/base/driver.c#222
+    pub fn register(&self, driver: Arc<dyn Driver>) -> Result<(), SystemError> {
+        let bus = driver.bus().ok_or_else(|| {
+            kerror!(
+                "DriverManager::register() failed: driver.bus() is None. Driver: '{:?}'",
+                driver.name()
+            );
+            SystemError::EINVAL
+        })?;
+
+        let drv_name = driver.name();
+        let other = bus.find_driver_by_name(&drv_name);
+        if other.is_some() {
+            kerror!(
+                "DriverManager::register() failed: driver '{}' already registered",
+                drv_name
+            );
+            return Err(SystemError::EBUSY);
+        }
+
+        bus_manager().add_driver(&driver)?;
+
+        self.add_groups(&driver, driver.groups()).map_err(|e| {
+            bus_manager().remove_driver(&driver);
+            e
+        })?;
+
+        // todo: 发送uevent
+
+        return Ok(());
+    }
+
+    /// 从系统中删除一个驱动程序
+    #[allow(dead_code)]
+    pub fn unregister(&self, driver: &Arc<dyn Driver>) {
+        self.remove_groups(driver, driver.groups());
+        bus_manager().remove_driver(driver);
+    }
+
     /// 参考： https://opengrok.ringotek.cn/xref/linux-6.1.9/drivers/base/dd.c#434
     pub fn driver_sysfs_add(&self, _dev: &Arc<dyn Device>) -> Result<(), SystemError> {
         todo!("DriverManager::driver_sysfs_add()");
     }
+
+    pub fn add_groups(
+        &self,
+        driver: &Arc<dyn Driver>,
+        groups: &'static [&dyn AttributeGroup],
+    ) -> Result<(), SystemError> {
+        let kobj = driver.clone() as Arc<dyn KObject>;
+        return sysfs_instance().create_groups(&kobj, groups);
+    }
+
+    pub fn remove_groups(&self, driver: &Arc<dyn Driver>, groups: &'static [&dyn AttributeGroup]) {
+        let kobj = driver.clone() as Arc<dyn KObject>;
+        sysfs_instance().remove_groups(&kobj, groups);
+    }
+
+    /// 为指定的驱动创建一个属性文件
+    ///
+    /// ## 参数
+    ///
+    /// - `driver` 要创建属性文件的驱动
+    /// - `attr` 属性
+    pub fn create_attr_file(
+        &self,
+        driver: &Arc<dyn Driver>,
+        attr: &'static dyn Attribute,
+    ) -> Result<(), SystemError> {
+        let kobj = driver.clone() as Arc<dyn KObject>;
+        return sysfs_instance().create_file(&kobj, attr);
+    }
+
+    /// 为指定的驱动删除一个属性文件
+    ///
+    /// 如果属性不存在,也不会报错
+    ///
+    /// ## 参数
+    ///
+    /// - `driver` 要删除属性文件的驱动
+    /// - `attr` 属性
+    pub fn remove_attr_file(&self, driver: &Arc<dyn Driver>, attr: &'static dyn Attribute) {
+        let kobj = driver.clone() as Arc<dyn KObject>;
+        sysfs_instance().remove_file(&kobj, attr);
+    }
+}
+
+/// 驱动匹配器
+///
+/// 用于匹配驱动是否符合某个条件
+///
+/// ## 参数
+///
+/// - `T` - 匹配器的数据类型
+/// - `data` - 匹配器的数据
+pub trait DriverMatcher<T>: Debug {
+    fn match_driver(&self, driver: &Arc<dyn Driver>, data: T) -> bool;
+}
+
+/// 根据名称匹配驱动
+#[derive(Debug)]
+pub struct DriverMatchName;
+
+impl DriverMatcher<&str> for DriverMatchName {
+    #[inline(always)]
+    fn match_driver(&self, driver: &Arc<dyn Driver>, data: &str) -> bool {
+        driver.name() == data
+    }
+}
+
+/// enum probe_type - device driver probe type to try
+///	Device drivers may opt in for special handling of their
+///	respective probe routines. This tells the core what to
+///	expect and prefer.
+///
+/// Note that the end goal is to switch the kernel to use asynchronous
+/// probing by default, so annotating drivers with
+/// %PROBE_PREFER_ASYNCHRONOUS is a temporary measure that allows us
+/// to speed up boot process while we are validating the rest of the
+/// drivers.
+#[allow(dead_code)]
+#[derive(Debug)]
+pub enum DriverProbeType {
+    /// Used by drivers that work equally well
+    ///	whether probed synchronously or asynchronously.
+    DefaultStrategy,
+
+    /// Drivers for "slow" devices which
+    ///	probing order is not essential for booting the system may
+    ///	opt into executing their probes asynchronously.
+    PreferAsync,
+
+    /// Use this to annotate drivers that need
+    ///	their probe routines to run synchronously with driver and
+    ///	device registration (with the exception of -EPROBE_DEFER
+    ///	handling - re-probing always ends up being done asynchronously).
+    ForceSync,
+}
+
+impl Default for DriverProbeType {
+    fn default() -> Self {
+        DriverProbeType::DefaultStrategy
+    }
 }

kernel/src/driver/base/device/init.rs

@@ -1,27 +1,17 @@
 use alloc::{string::ToString, sync::Arc};
 
 use crate::{
-    driver::{
-        base::{
-            device::{
-                sys_dev_kset, DeviceManager, DEVICES_KSET_INSTANCE, DEVICE_MANAGER,
-                DEV_KSET_INSTANCE,
-            },
-            kobject::KObject,
-            kset::KSet,
+    driver::base::{
+        device::{
+            sys_dev_kset, DeviceManager, DEVICES_KSET_INSTANCE, DEVICE_MANAGER, DEV_KSET_INSTANCE,
         },
-        uart::uart_device::uart_init,
+        kobject::KObject,
+        kset::KSet,
     },
     kdebug, kinfo,
     syscall::SystemError,
 };
 
-pub fn device_init() -> Result<(), SystemError> {
-    uart_init()?;
-    kinfo!("device init success");
-    return Ok(());
-}
-
 pub fn devices_init() -> Result<(), SystemError> {
     // 创建 `/sys/devices` 目录
     {
@@ -73,6 +63,6 @@ pub fn devices_init() -> Result<(), SystemError> {
     }
 
     kinfo!("devices init success");
-    device_init()?;
+
     return Ok(());
 }

kernel/src/driver/base/device/mod.rs

@@ -1,6 +1,6 @@
 use alloc::{
     string::{String, ToString},
-    sync::Arc,
+    sync::{Arc, Weak},
 };
 use intertrait::cast::CastArc;
 
@@ -8,10 +8,12 @@ use crate::{
     driver::{
         acpi::glue::acpi_device_notify,
         base::map::{LockedDevsMap, LockedKObjMap},
-        Driver,
     },
     filesystem::{
-        sysfs::{sysfs_instance, Attribute, AttributeGroup, SysFSOps, SysFSOpsSupport},
+        sysfs::{
+            file::sysfs_emit_str, sysfs_instance, Attribute, AttributeGroup, SysFSOps,
+            SysFSOpsSupport,
+        },
         vfs::syscall::ModeType,
     },
     syscall::SystemError,
@@ -19,12 +21,14 @@ use crate::{
 use core::fmt::Debug;
 use core::intrinsics::unlikely;
 
-use self::bus::{bus_add_device, bus_probe_device, Bus};
+use self::{
+    bus::{bus_add_device, bus_probe_device, Bus},
+    driver::Driver,
+};
 
 use super::{
-    kobject::{KObjType, KObject, KObjectManager},
+    kobject::{KObjType, KObject, KObjectManager, KObjectState},
     kset::KSet,
-    platform::CompatibleTable,
     swnode::software_node_notify,
 };
 
@@ -87,7 +91,7 @@ pub(self) fn sys_dev_char_kset() -> Arc<KSet> {
 /// ## 注意
 ///
 /// 由于设备驱动模型需要从Arc<dyn KObject>转换为Arc<dyn Device>，
-/// 因此，所有的实现了Device trait的结构体，都应该在结构体上方标注`#[[sync] Device]`，
+/// 因此，所有的实现了Device trait的结构体，都应该在结构体上方标注`#[cast_to([sync] Device)]`，
 ///
 /// 否则在释放设备资源的时候，会由于无法转换为Arc<dyn Device>而导致资源泄露，并且release回调函数也不会被调用。
 pub trait Device: KObject {
@@ -117,13 +121,39 @@ pub trait Device: KObject {
         return None;
     }
 
+    /// 设置当前设备所属的总线
+    ///
+    /// （一定要传入Arc，因为bus的subsysprivate里面存储的是Device的Weak指针）
+    fn set_bus(&self, bus: Option<Arc<dyn Bus>>);
+
     /// 返回已经与当前设备匹配好的驱动程序
     fn driver(&self) -> Option<Arc<dyn Driver>>;
 
-    fn set_driver(&self, driver: Option<Arc<dyn Driver>>);
+    fn set_driver(&self, driver: Option<Weak<dyn Driver>>);
 
     /// 当前设备是否已经挂掉了
     fn is_dead(&self) -> bool;
+
+    /// 当前设备是否处于可以被匹配的状态
+    ///
+    /// The device has matched with a driver at least once or it is in
+    /// a bus (like AMBA) which can't check for matching drivers until
+    /// other devices probe successfully.
+    fn can_match(&self) -> bool;
+
+    fn set_can_match(&self, can_match: bool);
+
+    /// The hardware state of this device has been synced to match
+    /// the software state of this device by calling the driver/bus
+    /// sync_state() callback.
+    fn state_synced(&self) -> bool;
+}
+
+impl dyn Device {
+    #[inline(always)]
+    pub fn is_registered(&self) -> bool {
+        self.kobj_state().contains(KObjectState::IN_SYSFS)
+    }
 }
 
 // 暂定是不可修改的，在初始化的时候就要确定。以后可能会包括例如硬件中断包含的信息
@@ -131,24 +161,13 @@ pub trait Device: KObject {
 #[derive(Debug, Clone)]
 pub struct DevicePrivateData {
     id_table: IdTable,
-    resource: Option<DeviceResource>,
-    compatible_table: CompatibleTable,
     state: DeviceState,
 }
 
+#[allow(dead_code)]
 impl DevicePrivateData {
-    pub fn new(
-        id_table: IdTable,
-        resource: Option<DeviceResource>,
-        compatible_table: CompatibleTable,
-        state: DeviceState,
-    ) -> Self {
-        Self {
-            id_table,
-            resource,
-            compatible_table,
-            state,
-        }
+    pub fn new(id_table: IdTable, state: DeviceState) -> Self {
+        Self { id_table, state }
     }
 
     pub fn id_table(&self) -> &IdTable {
@@ -159,31 +178,11 @@ impl DevicePrivateData {
         self.state
     }
 
-    #[allow(dead_code)]
-    pub fn resource(&self) -> Option<&DeviceResource> {
-        self.resource.as_ref()
-    }
-
-    pub fn compatible_table(&self) -> &CompatibleTable {
-        &self.compatible_table
-    }
-
     pub fn set_state(&mut self, state: DeviceState) {
         self.state = state;
     }
 }
 
-#[derive(Debug, Clone)]
-pub struct DeviceResource {
-    //可能会用来保存例如 IRQ PWM 内存地址等需要申请的资源，将来由资源管理器+Framework框架进行管理。
-}
-
-impl Default for DeviceResource {
-    fn default() -> Self {
-        return Self {};
-    }
-}
-
 int_like!(DeviceNumber, usize);
 
 impl Default for DeviceNumber {
@@ -225,6 +224,8 @@ impl DeviceNumber {
         self.0 & 0xff
     }
 
+    #[inline]
+    #[allow(dead_code)]
     pub fn from_major_minor(major: usize, minor: usize) -> usize {
         ((major & 0xffffff) << 8) | (minor & 0xff)
     }
@@ -287,7 +288,7 @@ impl Default for IdTable {
 
 // 以现在的模型，设备在加载到系统中就是已经初始化的状态了，因此可以考虑把这个删掉
 /// @brief: 设备当前状态
-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone, Copy, Eq, PartialEq)]
 pub enum DeviceState {
     NotInitialized = 0,
     Initialized = 1,
@@ -465,6 +466,11 @@ impl DeviceManager {
         todo!()
     }
 
+    /// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/drivers/base/dd.c?fi=driver_attach#542
+    fn remove(&self, _dev: &Arc<dyn Device>) {
+        todo!("DeviceManager::remove")
+    }
+
     /// @brief: 获取设备
     /// @parameter id_table: 设备标识符，用于唯一标识该设备
     /// @return: 设备实例
@@ -521,10 +527,8 @@ impl DeviceManager {
         dev: &Arc<dyn Device>,
         attr_groups: &'static [&dyn AttributeGroup],
     ) -> Result<(), SystemError> {
-        let dev = dev.clone();
-        let binding = dev.arc_any();
-        let kobj: &Arc<dyn KObject> = binding.downcast_ref().unwrap();
-        return sysfs_instance().create_groups(kobj, attr_groups);
+        let kobj = dev.clone() as Arc<dyn KObject>;
+        return sysfs_instance().create_groups(&kobj, attr_groups);
     }
 
     /// 为设备在sysfs中创建属性文件
@@ -567,15 +571,15 @@ impl DeviceManager {
         let target_kobj = self.device_to_dev_kobj(dev);
         let name = dev.id_table().name();
         let current_kobj = dev.clone() as Arc<dyn KObject>;
-        return sysfs_instance().create_link(&current_kobj, &target_kobj, name);
+        return sysfs_instance().create_link(Some(&current_kobj), &target_kobj, name);
     }
 
     /// Delete symlink for device in `/sys/dev` or `/sys/class/<class_name>`
     #[allow(dead_code)]
-    fn remove_sys_dev_entry(&self, dev: &Arc<dyn Device>) -> Result<(), SystemError> {
+    fn remove_sys_dev_entry(&self, dev: &Arc<dyn Device>) {
         let kobj = self.device_to_dev_kobj(dev);
         let name = dev.id_table().name();
-        return sysfs_instance().remove_link(&kobj, name);
+        sysfs_instance().remove_link(&kobj, name);
     }
 
     /// device_to_dev_kobj - select a /sys/dev/ directory for the device
@@ -595,6 +599,28 @@ impl DeviceManager {
     pub fn device_links_force_bind(&self, _dev: &Arc<dyn Device>) {
         todo!("device_links_force_bind")
     }
+
+    /// 把device对象的一些结构进行默认初始化
+    ///
+    /// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/drivers/base/core.c?fi=device_initialize#2976
+    pub fn device_default_initialize(&self, dev: &Arc<dyn Device>) {
+        dev.set_kset(Some(sys_devices_kset()));
+        return;
+    }
+
+    /// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/drivers/base/dd.c?r=&mo=29885&fi=1100#1100
+    pub fn device_driver_attach(
+        &self,
+        _driver: &Arc<dyn Driver>,
+        _dev: &Arc<dyn Device>,
+    ) -> Result<(), SystemError> {
+        todo!("device_driver_attach")
+    }
+
+    /// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/drivers/base/dd.c?r=&mo=35401&fi=1313#1313
+    pub fn device_driver_detach(&self, _dev: &Arc<dyn Device>) {
+        todo!("device_driver_detach")
+    }
 }
 
 /// @brief: 设备注册
@@ -633,7 +659,7 @@ impl Attribute for DeviceAttrDev {
         "dev"
     }
 
-    fn show(&self, kobj: Arc<dyn KObject>, _buf: &mut [u8]) -> Result<usize, SystemError> {
+    fn show(&self, kobj: Arc<dyn KObject>, buf: &mut [u8]) -> Result<usize, SystemError> {
         let dev = kobj.cast::<dyn Device>().map_err(|kobj| {
             kerror!(
                 "Intertrait casting not implemented for kobj: {}",
@@ -642,7 +668,10 @@ impl Attribute for DeviceAttrDev {
             SystemError::EOPNOTSUPP_OR_ENOTSUP
         })?;
 
-        return Ok(dev.id_table().device_number().into());
+        let device_number = dev.id_table().device_number();
+        let s = format!("{}:{}\n", device_number.major(), device_number.minor());
+
+        return sysfs_emit_str(buf, &s);
     }
 
     fn support(&self) -> SysFSOpsSupport {

kernel/src/driver/base/init.rs

@@ -1,4 +1,4 @@
-use crate::syscall::SystemError;
+use crate::{driver::tty::tty_device::tty_init, syscall::SystemError};
 
 use super::{
     class::classes_init,
@@ -15,5 +15,15 @@ pub(super) fn driver_init() -> Result<(), SystemError> {
     firmware_init()?;
     hypervisor_init()?;
     platform_bus_init()?;
+
+    // 至此，已完成设备驱动模型的初始化
+    // 接下来，初始化设备
+    actual_device_init()?;
+    return Ok(());
+}
+
+fn actual_device_init() -> Result<(), SystemError> {
+    tty_init()?;
+
     return Ok(());
 }

kernel/src/driver/base/kobject.rs

@@ -43,6 +43,8 @@ pub trait KObject: Any + Send + Sync + Debug + CastFromSync {
 
     fn kobj_type(&self) -> Option<&'static dyn KObjType>;
 
+    fn set_kobj_type(&self, ktype: Option<&'static dyn KObjType>);
+
     fn name(&self) -> String;
 
     fn set_name(&self, name: String);
@@ -70,7 +72,7 @@ impl DowncastArc for dyn KObject {
     }
 }
 
-pub trait KObjType: Debug {
+pub trait KObjType: Debug + Send + Sync {
     fn release(&self, _kobj: Arc<dyn KObject>) {}
     fn sysfs_ops(&self) -> Option<&dyn SysFSOps>;
 
@@ -91,7 +93,8 @@ bitflags! {
 pub struct LockedKObjectState(RwLock<KObjectState>);
 
 impl LockedKObjectState {
-    pub const fn new(state: KObjectState) -> LockedKObjectState {
+    pub fn new(state: Option<KObjectState>) -> LockedKObjectState {
+        let state = state.unwrap_or(KObjectState::empty());
         LockedKObjectState(RwLock::new(state))
     }
 }

kernel/src/driver/base/kset.rs

@@ -52,7 +52,7 @@ impl KSet {
         let r = Self {
             kobjects: RwLock::new(Vec::new()),
             inner: RwLock::new(InnerKSet::new(name)),
-            kobj_state: LockedKObjectState::new(KObjectState::empty()),
+            kobj_state: LockedKObjectState::new(None),
             parent_data: RwLock::new(KSetParentData::new(None, None)),
             self_ref: Weak::default(),
         };
@@ -167,6 +167,10 @@ impl KObject for KSet {
         Some(&KSetKObjType)
     }
 
+    fn set_kobj_type(&self, _ktype: Option<&'static dyn KObjType>) {
+        todo!("KSet::set_kobj_type")
+    }
+
     fn kset(&self) -> Option<Arc<KSet>> {
         self.parent_data.read().kset.clone()
     }

kernel/src/driver/base/platform/mod.rs

@@ -74,8 +74,6 @@ pub fn platform_bus_init() -> Result<(), SystemError> {
     let platform_device: Arc<PlatformBusDevice> = PlatformBusDevice::new(
         DevicePrivateData::new(
             IdTable::new("platform".to_string(), DeviceNumber::new(0)),
-            None,
-            CompatibleTable::new(vec!["platform"]),
             BusState::NotInitialized.into(),
         ),
         Some(Arc::downgrade(&(sys_devices_kset() as Arc<dyn KObject>))),

kernel/src/driver/base/platform/platform_device.rs

@@ -2,31 +2,64 @@ use alloc::{
     string::{String, ToString},
     sync::{Arc, Weak},
 };
+use ida::IdAllocator;
 
 use crate::{
-    driver::{
-        base::{
-            device::{
-                bus::{Bus, BusState},
-                Device, DeviceNumber, DevicePrivateData, DeviceType, IdTable,
-            },
-            kobject::{KObjType, KObject, KObjectState, LockedKObjectState},
-            kset::KSet,
+    driver::base::{
+        device::{
+            bus::{Bus, BusState},
+            device_manager,
+            driver::Driver,
+            Device, DeviceNumber, DevicePrivateData, DeviceType, IdTable,
         },
-        Driver,
+        kobject::{KObjType, KObject, KObjectState, LockedKObjectState},
+        kset::KSet,
     },
     filesystem::kernfs::KernFSInode,
     libs::{
         rwlock::{RwLockReadGuard, RwLockWriteGuard},
         spinlock::SpinLock,
     },
+    syscall::SystemError,
 };
 
-use super::{super::device::DeviceState, CompatibleTable};
+use super::{super::device::DeviceState, platform_bus, platform_bus_device, CompatibleTable};
+
+/// 平台设备id分配器
+static PLATFORM_DEVID_IDA: IdAllocator = IdAllocator::new(i32::MAX as usize);
+
+#[inline(always)]
+pub fn platform_device_manager() -> &'static PlatformDeviceManager {
+    &PlatformDeviceManager
+}
+
+/// 没有平台设备id
+pub const PLATFORM_DEVID_NONE: i32 = -1;
+/// 请求自动分配这个平台设备id
+pub const PLATFORM_DEVID_AUTO: i32 = -2;
 
 /// @brief: 实现该trait的设备实例应挂载在platform总线上，
 ///         同时应该实现Device trait
+///
+/// ## 注意
+///
+/// 应当在所有实现这个trait的结构体上方，添加 `#[cast_to([sync] PlatformDriver)]`，
+/// 否则运行时将报错“该对象不是PlatformDriver”
 pub trait PlatformDevice: Device {
+    fn pdev_name(&self) -> &str;
+    /// 返回平台设备id，以及这个id是否是自动生成的
+    ///
+    /// 请注意，如果当前设备还没有id，应该返回
+    /// (PLATFORM_DEVID_NONE, false)
+    fn pdev_id(&self) -> (i32, bool) {
+        (PLATFORM_DEVID_NONE, false)
+    }
+
+    /// 设置平台设备id
+    fn set_pdev_id(&self, id: i32);
+    /// 设置id是否为自动分配
+    fn set_pdev_id_auto(&self, id_auto: bool);
+
     fn compatible_table(&self) -> CompatibleTable;
     /// @brief: 判断设备是否初始化
     /// @parameter: None
@@ -39,6 +72,54 @@ pub trait PlatformDevice: Device {
     fn set_state(&self, set_state: DeviceState);
 }
 
+#[derive(Debug)]
+pub struct PlatformDeviceManager;
+
+impl PlatformDeviceManager {
+    /// platform_device_add - add a platform device to device hierarchy
+    pub fn device_add(&self, pdev: Arc<dyn PlatformDevice>) -> Result<(), SystemError> {
+        if pdev.parent().is_none() {
+            pdev.set_parent(Some(Arc::downgrade(
+                &(platform_bus_device() as Arc<dyn KObject>),
+            )));
+        }
+
+        pdev.set_bus(Some(platform_bus() as Arc<dyn Bus>));
+
+        let id = pdev.pdev_id().0;
+        match id {
+            PLATFORM_DEVID_NONE => {
+                pdev.set_name(format!("{}", pdev.pdev_name()));
+            }
+            PLATFORM_DEVID_AUTO => {
+                let id = PLATFORM_DEVID_IDA.alloc().ok_or(SystemError::EOVERFLOW)?;
+                pdev.set_pdev_id(id as i32);
+                pdev.set_pdev_id_auto(true);
+                pdev.set_name(format!("{}.{}.auto", pdev.pdev_name(), pdev.pdev_id().0));
+            }
+            _ => {
+                pdev.set_name(format!("{}.{}", pdev.pdev_name(), id));
+            }
+        }
+
+        // todo: 插入资源： https://opengrok.ringotek.cn/xref/linux-6.1.9/drivers/base/platform.c?fi=platform_device_add#691
+        let r = device_manager().add_device(pdev.clone() as Arc<dyn Device>);
+        if r.is_ok() {
+            pdev.set_state(DeviceState::Initialized);
+            return Ok(()); // success
+        } else {
+            // failed
+            let pdevid = pdev.pdev_id();
+            if pdevid.1 {
+                PLATFORM_DEVID_IDA.free(pdevid.0 as usize);
+                pdev.set_pdev_id(PLATFORM_DEVID_AUTO);
+            }
+
+            return r;
+        }
+    }
+}
+
 #[derive(Debug)]
 #[cast_to([sync] Device)]
 pub struct PlatformBusDevice {
@@ -56,7 +137,7 @@ impl PlatformBusDevice {
     ) -> Arc<PlatformBusDevice> {
         return Arc::new(PlatformBusDevice {
             inner: SpinLock::new(InnerPlatformBusDevice::new(data, parent)),
-            kobj_state: LockedKObjectState::new(KObjectState::empty()),
+            kobj_state: LockedKObjectState::new(None),
         });
     }
 
@@ -101,18 +182,8 @@ impl PlatformBusDevice {
         let state = self.inner.lock().state;
         return state;
     }
-
-    // /// @brief:
-    // /// @parameter: None
-    // /// @return: 总线状态
-    // #[inline]
-    // #[allow(dead_code)]
-    // fn set_driver(&self, driver: Option<Arc<LockedPlatformBusDriver>>) {
-    //     self.0.lock().driver = driver;
-    // }
 }
 
-/// @brief: platform总线
 #[allow(dead_code)]
 #[derive(Debug, Clone)]
 pub struct InnerPlatformBusDevice {
@@ -125,14 +196,10 @@ pub struct InnerPlatformBusDevice {
     /// 当前设备挂载到的总线
     bus: Option<Arc<dyn Bus>>,
     /// 当前设备已经匹配的驱动
-    driver: Option<Arc<dyn Driver>>,
+    driver: Option<Weak<dyn Driver>>,
 }
 
-/// @brief: platform方法集
 impl InnerPlatformBusDevice {
-    /// @brief: 创建一个platform总线实例
-    /// @parameter: None
-    /// @return: platform总线实例
     pub fn new(data: DevicePrivateData, parent: Option<Weak<dyn KObject>>) -> Self {
         Self {
             data,
@@ -167,6 +234,10 @@ impl KObject for PlatformBusDevice {
         None
     }
 
+    fn set_kobj_type(&self, _ktype: Option<&'static dyn KObjType>) {
+        todo!("platform_bus_device::set_kobj_type")
+    }
+
     fn kset(&self) -> Option<Arc<KSet>> {
         None
     }
@@ -218,8 +289,12 @@ impl Device for PlatformBusDevice {
         self.inner.lock().bus.clone()
     }
 
+    fn set_bus(&self, bus: Option<Arc<dyn Bus>>) {
+        self.inner.lock().bus = bus;
+    }
+
     fn driver(&self) -> Option<Arc<dyn Driver>> {
-        self.inner.lock().driver.clone()
+        self.inner.lock().driver.clone()?.upgrade()
     }
 
     #[inline]
@@ -227,7 +302,19 @@ impl Device for PlatformBusDevice {
         false
     }
 
-    fn set_driver(&self, driver: Option<Arc<dyn Driver>>) {
+    fn set_driver(&self, driver: Option<Weak<dyn Driver>>) {
         self.inner.lock().driver = driver;
     }
+
+    fn can_match(&self) -> bool {
+        todo!()
+    }
+
+    fn set_can_match(&self, _can_match: bool) {
+        todo!()
+    }
+
+    fn state_synced(&self) -> bool {
+        todo!()
+    }
 }

kernel/src/driver/base/platform/platform_driver.rs

@@ -1,21 +1,54 @@
-use crate::driver::{base::device::DevicePrivateData, Driver};
+use alloc::sync::Arc;
 
-use super::{super::device::driver::DriverError, CompatibleTable};
+use crate::{
+    driver::base::device::{
+        bus::Bus,
+        driver::{driver_manager, Driver},
+    },
+    syscall::SystemError,
+};
+
+use super::{platform_bus, platform_device::PlatformDevice};
 
-lazy_static! {
-    static ref PLATFORM_COMPAT_TABLE: CompatibleTable = CompatibleTable::new(vec!["platform"]);
-}
 /// @brief: 实现该trait的设备驱动实例应挂载在platform总线上，
 ///         同时应该实现Driver trait
+///
+/// ## 注意
+///
+/// 应当在所有实现这个trait的结构体上方，添加 `#[cast_to([sync] PlatformDriver)]`，
+/// 否则运行时将报错“该对象不是PlatformDriver”
 pub trait PlatformDriver: Driver {
-    fn compatible_table(&self) -> CompatibleTable;
-    /// @brief 探测设备
-    /// @param data 设备初始拥有的基本信息
-    fn probe(&self, data: DevicePrivateData) -> Result<(), DriverError> {
-        if data.compatible_table().matches(&PLATFORM_COMPAT_TABLE) {
-            return Ok(());
-        } else {
-            return Err(DriverError::UnsupportedOperation);
-        }
+    /// 检测设备是否能绑定到这个驱动
+    ///
+    /// 如果能，则把设备的driver指向这个驱动。
+    /// 请注意，这个函数不应该把driver加入驱动的devices列表，相关工作会在外部的函数里面处理。
+    fn probe(&self, device: &Arc<dyn PlatformDevice>) -> Result<(), SystemError>;
+    fn remove(&self, device: &Arc<dyn PlatformDevice>) -> Result<(), SystemError>;
+    fn shutdown(&self, device: &Arc<dyn PlatformDevice>) -> Result<(), SystemError>;
+    fn suspend(&self, device: &Arc<dyn PlatformDevice>) -> Result<(), SystemError>;
+    fn resume(&self, device: &Arc<dyn PlatformDevice>) -> Result<(), SystemError>;
+}
+
+#[inline(always)]
+pub fn platform_driver_manager() -> &'static PlatformDriverManager {
+    &PlatformDriverManager
+}
+
+#[derive(Debug)]
+pub struct PlatformDriverManager;
+
+impl PlatformDriverManager {
+    /// 注册平台设备驱动
+    ///
+    /// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/drivers/base/platform.c?fi=__platform_driver_register#861
+    pub fn register(&self, driver: Arc<dyn PlatformDriver>) -> Result<(), SystemError> {
+        driver.set_bus(Some(platform_bus() as Arc<dyn Bus>));
+        return driver_manager().register(driver as Arc<dyn Driver>);
+    }
+
+    /// 卸载平台设备驱动
+    #[allow(dead_code)]
+    pub fn unregister(&self, driver: &Arc<dyn PlatformDriver>) {
+        driver_manager().unregister(&(driver.clone() as Arc<dyn Driver>));
     }
 }

kernel/src/driver/base/platform/subsys.rs

@@ -2,15 +2,26 @@ use alloc::{
     string::{String, ToString},
     sync::{Arc, Weak},
 };
+use intertrait::cast::CastArc;
 
 use crate::{
-    driver::base::{device::bus::Bus, kobject::KObject, subsys::SubSysPrivate},
+    driver::{
+        acpi::acpi_manager,
+        base::{
+            device::{bus::Bus, driver::Driver, Device},
+            kobject::KObject,
+            subsys::SubSysPrivate,
+        },
+    },
     filesystem::{
         sysfs::{Attribute, AttributeGroup},
         vfs::syscall::ModeType,
     },
+    syscall::SystemError,
 };
 
+use super::{platform_device::PlatformDevice, platform_driver::PlatformDriver};
+
 #[derive(Debug)]
 pub struct PlatformBus {
     private: SubSysPrivate,
@@ -44,6 +55,92 @@ impl Bus for PlatformBus {
     fn subsystem(&self) -> &SubSysPrivate {
         return &self.private;
     }
+
+    fn probe(&self, device: &Arc<dyn Device>) -> Result<(), SystemError> {
+        let drv = device.driver().ok_or(SystemError::EINVAL)?;
+        let pdrv = drv.cast::<dyn PlatformDriver>().map_err(|_|{
+            kerror!("PlatformBus::probe() failed: device.driver() is not a PlatformDriver. Device: '{:?}'", device.name());
+            SystemError::EINVAL
+        })?;
+
+        let pdev = device.clone().cast::<dyn PlatformDevice>().map_err(|_| {
+            kerror!(
+                "PlatformBus::probe() failed: device is not a PlatformDevice. Device: '{:?}'",
+                device.name()
+            );
+            SystemError::EINVAL
+        })?;
+
+        return pdrv.probe(&pdev);
+    }
+
+    fn remove(&self, _device: &Arc<dyn Device>) -> Result<(), SystemError> {
+        todo!()
+    }
+
+    fn sync_state(&self, _device: &Arc<dyn Device>) {
+        todo!()
+    }
+
+    fn shutdown(&self, _device: &Arc<dyn Device>) {
+        todo!()
+    }
+
+    fn resume(&self, _device: &Arc<dyn Device>) -> Result<(), SystemError> {
+        todo!()
+    }
+
+    ///
+    /// match platform device to platform driver.
+    ///
+    /// ## 参数
+    ///
+    /// * `device` - platform device
+    /// * `driver` - platform driver
+    ///
+    /// ## 返回
+    ///
+    /// - `Ok(true)` - 匹配成功
+    /// - `Ok(false)` - 匹配失败
+    /// - `Err(_)` - 由于内部错误导致匹配失败
+    ///
+    /// Platform device IDs are assumed to be encoded like this:
+    /// "<name><instance>", where <name> is a short description of the type of
+    /// device, like "pci" or "floppy", and <instance> is the enumerated
+    /// instance of the device, like '0' or '42'.  Driver IDs are simply
+    /// "<name>".  So, extract the <name> from the platform_device structure,
+    /// and compare it against the name of the driver. Return whether they match
+    /// or not.
+    ///
+    /// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/drivers/base/platform.c#1331
+    ///
+    ///
+    fn match_device(
+        &self,
+        device: &Arc<dyn Device>,
+        driver: &Arc<dyn Driver>,
+    ) -> Result<bool, SystemError> {
+        // 尝试从 ACPI 中匹配
+        if let Ok(x) = acpi_manager().driver_match_device(driver, device) {
+            if x {
+                return Ok(true);
+            }
+        }
+
+        // 尝试从 ID table 中匹配
+        if let Some(drv_id_table) = driver.id_table() {
+            let pdev = device
+                .clone()
+                .cast::<dyn PlatformDevice>()
+                .map_err(|_| SystemError::EINVAL)?;
+            if drv_id_table.name().eq(&pdev.name()) {
+                return Ok(true);
+            }
+        }
+
+        // 尝试根据设备名称匹配
+        return Ok(device.name().eq(&driver.name()));
+    }
 }
 
 #[derive(Debug)]

kernel/src/driver/base/subsys.rs

@@ -10,14 +10,18 @@ use alloc::{
 };
 
 use crate::{
-    driver::Driver,
-    libs::{notifier::AtomicNotifierChain, rwlock::RwLock, spinlock::SpinLock},
+    libs::{
+        notifier::AtomicNotifierChain,
+        rwlock::{RwLock, RwLockReadGuard},
+        spinlock::SpinLock,
+    },
     syscall::SystemError,
 };
 
 use super::{
     device::{
         bus::{Bus, BusNotifyEvent},
+        driver::Driver,
         Device,
     },
     kset::KSet,
@@ -90,12 +94,12 @@ impl SubSysPrivate {
         *self.bus.lock() = bus;
     }
 
-    pub fn devices(&self) -> &RwLock<Vec<Weak<dyn Device>>> {
-        return &self.devices;
+    pub fn devices(&self) -> RwLockReadGuard<Vec<Weak<dyn Device>>> {
+        return self.devices.read();
     }
 
-    pub fn drivers(&self) -> &RwLock<Vec<Weak<dyn Driver>>> {
-        return &self.drivers;
+    pub fn drivers(&self) -> RwLockReadGuard<Vec<Weak<dyn Driver>>> {
+        return self.drivers.read();
     }
 
     pub fn drivers_autoprobe(&self) -> bool {
@@ -136,6 +140,45 @@ impl SubSysPrivate {
     pub fn interfaces(&self) -> &'static [&'static dyn SubSysInterface] {
         return self.interfaces;
     }
+
+    pub fn add_driver_to_vec(&self, driver: &Arc<dyn Driver>) -> Result<(), SystemError> {
+        let mut drivers = self.drivers.write();
+        let driver_weak = Arc::downgrade(driver);
+        if drivers.iter().any(|d| d.ptr_eq(&driver_weak)) {
+            return Err(SystemError::EEXIST);
+        }
+        drivers.push(driver_weak);
+        return Ok(());
+    }
+
+    pub fn remove_driver_from_vec(&self, driver: &Arc<dyn Driver>) {
+        let mut drivers = self.drivers.write();
+        let driver_weak = Arc::downgrade(driver);
+        let index = drivers.iter().position(|d| d.ptr_eq(&driver_weak));
+        if let Some(index) = index {
+            drivers.remove(index);
+        }
+    }
+
+    pub fn add_device_to_vec(&self, device: &Arc<dyn Device>) -> Result<(), SystemError> {
+        let mut devices = self.devices.write();
+        let device_weak = Arc::downgrade(device);
+        if devices.iter().any(|d| d.ptr_eq(&device_weak)) {
+            return Err(SystemError::EEXIST);
+        }
+        devices.push(device_weak);
+        return Ok(());
+    }
+
+    #[allow(dead_code)]
+    pub fn remove_device_from_vec(&self, device: &Arc<dyn Device>) {
+        let mut devices = self.devices.write();
+        let device_weak = Arc::downgrade(device);
+        let index = devices.iter().position(|d| d.ptr_eq(&device_weak));
+        if let Some(index) = index {
+            devices.remove(index);
+        }
+    }
 }
 
 /// 参考： https://opengrok.ringotek.cn/xref/linux-6.1.9/include/linux/device.h#63

kernel/src/driver/disk/ahci/ahcidisk.rs

@@ -3,11 +3,12 @@ use crate::driver::base::block::block_device::{BlockDevice, BlockId};
 use crate::driver::base::block::disk_info::Partition;
 use crate::driver::base::block::SeekFrom;
 use crate::driver::base::device::bus::Bus;
+use crate::driver::base::device::driver::Driver;
 use crate::driver::base::device::{Device, DeviceType, IdTable};
 use crate::driver::base::kobject::{KObjType, KObject, KObjectState};
 use crate::driver::base::kset::KSet;
 use crate::driver::disk::ahci::HBA_PxIS_TFES;
-use crate::driver::Driver;
+
 use crate::filesystem::kernfs::KernFSInode;
 use crate::filesystem::mbr::MbrDiskPartionTable;
 use crate::include::bindings::bindings::verify_area;
@@ -489,6 +490,10 @@ impl KObject for LockedAhciDisk {
     fn set_parent(&self, _parent: Option<Weak<dyn KObject>>) {
         todo!()
     }
+
+    fn set_kobj_type(&self, _ktype: Option<&'static dyn KObjType>) {
+        todo!()
+    }
 }
 
 impl Device for LockedAhciDisk {
@@ -504,6 +509,10 @@ impl Device for LockedAhciDisk {
         todo!("LockedAhciDisk::bus()")
     }
 
+    fn set_bus(&self, _bus: Option<Arc<dyn Bus>>) {
+        todo!("LockedAhciDisk::set_bus()")
+    }
+
     fn driver(&self) -> Option<Arc<dyn Driver>> {
         todo!("LockedAhciDisk::driver()")
     }
@@ -512,9 +521,21 @@ impl Device for LockedAhciDisk {
         false
     }
 
-    fn set_driver(&self, _driver: Option<Arc<dyn Driver>>) {
+    fn set_driver(&self, _driver: Option<Weak<dyn Driver>>) {
         todo!("LockedAhciDisk::set_driver()")
     }
+
+    fn can_match(&self) -> bool {
+        todo!()
+    }
+
+    fn set_can_match(&self, _can_match: bool) {
+        todo!()
+    }
+
+    fn state_synced(&self) -> bool {
+        todo!()
+    }
 }
 
 impl BlockDevice for LockedAhciDisk {

kernel/src/driver/interrupt/apic/apic.c

@@ -6,7 +6,6 @@
 #include <common/printk.h>
 #include <driver/acpi/acpi.h>
 #include <exception/gate.h>
-#include <driver/uart/uart.h>
 #include <exception/softirq.h>
 #include <process/process.h>
 #include <sched/sched.h>

kernel/src/driver/mod.rs

@@ -6,50 +6,5 @@ pub mod net;
 pub mod pci;
 pub mod timers;
 pub mod tty;
-pub mod uart;
 pub mod video;
 pub mod virtio;
-
-use core::fmt::Debug;
-
-use alloc::sync::Arc;
-
-use self::base::{
-    device::{driver::DriverError, Device, DevicePrivateData, DeviceResource, IdTable},
-    kobject::KObject,
-    platform::CompatibleTable,
-};
-pub trait Driver: Sync + Send + Debug + KObject {
-    /// @brief: 获取驱动匹配表
-    /// @parameter: None
-    /// @return: 驱动匹配表
-    /// 对于不需要匹配，在系统初始化的时候就生成的设备，例如 PlatformBus 就不需要匹配表
-    fn compatible_table(&self) -> CompatibleTable {
-        //TODO 要完善每个 CompatibleTable ，将来要把这个默认实现删除
-        return CompatibleTable::new(vec!["unknown"]);
-    }
-
-    /// @brief 添加可支持的设备
-    /// @parameter: device 新增的匹配项
-    fn append_compatible_table(&self, _device: &CompatibleTable) -> Result<(), DriverError> {
-        Err(DriverError::UnsupportedOperation)
-    }
-
-    /// @brief 探测设备
-    /// @param data 设备初始拥有的基本信息
-    fn probe(&self, data: &DevicePrivateData) -> Result<(), DriverError>;
-
-    /// @brief 加载设备，包括检查资源可用性，和注册到相应的管理器中。
-    /// @param data 设备初始拥有的信息
-    /// @param resource 设备可能申请的资源(或者像伪设备不需要就为None)
-    fn load(
-        &self,
-        data: DevicePrivateData,
-        resource: Option<DeviceResource>,
-    ) -> Result<Arc<dyn Device>, DriverError>;
-
-    /// @brief: 获取驱动标识符
-    /// @parameter: None
-    /// @return: 该驱动驱动唯一标识符
-    fn id_table(&self) -> IdTable;
-}

kernel/src/driver/net/mod.rs

@@ -6,7 +6,7 @@ use smoltcp::{
 
 use crate::{libs::spinlock::SpinLock, syscall::SystemError};
 
-use super::Driver;
+use super::base::device::driver::Driver;
 
 pub mod virtio_net;
 

kernel/src/driver/net/virtio_net.rs

@@ -11,11 +11,10 @@ use virtio_drivers::{device::net::VirtIONet, transport::Transport};
 use crate::{
     driver::{
         base::{
-            device::{driver::DriverError, Device, DevicePrivateData, DeviceResource, IdTable},
-            kobject::KObject,
+            device::{bus::Bus, driver::Driver, Device, IdTable},
+            kobject::{KObjType, KObject, KObjectState},
         },
         virtio::virtio_impl::HalImpl,
-        Driver,
     },
     kerror, kinfo,
     libs::spinlock::SpinLock,
@@ -245,19 +244,27 @@ pub fn virtio_net<T: Transport + 'static>(transport: T) {
 }
 
 impl<T: Transport + 'static> Driver for VirtioInterface<T> {
-    fn probe(&self, _data: &DevicePrivateData) -> Result<(), DriverError> {
+    fn id_table(&self) -> Option<IdTable> {
         todo!()
     }
 
-    fn load(
-        &self,
-        _data: DevicePrivateData,
-        _resource: Option<DeviceResource>,
-    ) -> Result<Arc<dyn Device>, DriverError> {
+    fn add_device(&self, _device: Arc<dyn Device>) {
+        todo!()
+    }
+
+    fn delete_device(&self, _device: &Arc<dyn Device>) {
+        todo!()
+    }
+
+    fn devices(&self) -> alloc::vec::Vec<Arc<dyn Device>> {
         todo!()
     }
 
-    fn id_table(&self) -> IdTable {
+    fn bus(&self) -> Option<Arc<dyn Bus>> {
+        todo!()
+    }
+
+    fn set_bus(&self, _bus: Option<Arc<dyn Bus>>) {
         todo!()
     }
 }
@@ -372,7 +379,11 @@ impl<T: Transport + 'static> KObject for VirtioInterface<T> {
         todo!()
     }
 
-    fn set_kobj_state(&self, _state: crate::driver::base::kobject::KObjectState) {
+    fn set_kobj_state(&self, _state: KObjectState) {
+        todo!()
+    }
+
+    fn set_kobj_type(&self, _ktype: Option<&'static dyn KObjType>) {
         todo!()
     }
 }

kernel/src/driver/tty/init.rs

@@ -0,0 +1,8 @@
+use crate::syscall::SystemError;
+
+use super::serial::serial_early_init;
+
+pub fn tty_early_init() -> Result<(), SystemError> {
+    serial_early_init()?;
+    return Ok(());
+}

kernel/src/driver/tty/mod.rs

@@ -9,7 +9,10 @@ use thingbuf::mpsc::{
 
 use crate::libs::rwlock::RwLock;
 
+pub mod init;
+pub mod serial;
 pub mod tty_device;
+pub mod tty_driver;
 
 bitflags! {
     pub struct TtyCoreState: u32{

kernel/src/driver/tty/serial/mod.rs

@@ -0,0 +1,71 @@
+use core::{fmt::Debug, sync::atomic::AtomicU32};
+
+use alloc::sync::Arc;
+
+use crate::{driver::base::device::DeviceNumber, mm::VirtAddr, syscall::SystemError};
+
+use self::serial8250::serial8250_manager;
+
+use super::tty_driver::TtyDriver;
+
+pub mod serial8250;
+
+pub trait UartDriver: Debug + Send + Sync + TtyDriver {
+    fn device_number(&self) -> DeviceNumber;
+
+    /// 获取最大的设备数量
+    fn max_devs_num(&self) -> i32;
+
+    // todo: 获取指向console的指针（在我们系统里面，将来可能是改进后的Textui Window）
+}
+
+/// 串口端口应当实现的trait
+///
+/// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/include/linux/serial_core.h#428
+pub trait UartPort {
+    fn iobase(&self) -> Option<usize> {
+        None
+    }
+    fn membase(&self) -> Option<VirtAddr> {
+        None
+    }
+    fn serial_in(&self, offset: u32) -> u32;
+    fn serial_out(&self, offset: u32, value: u32);
+    fn divisor(&self, baud: BaudRate) -> (u32, DivisorFraction);
+    fn set_divisor(&self, baud: BaudRate) -> Result<(), SystemError>;
+    fn baud_rate(&self) -> Option<BaudRate>;
+    fn startup(&self) -> Result<(), SystemError>;
+    fn shutdown(&self);
+    fn handle_irq(&self) -> Result<(), SystemError>;
+}
+
+int_like!(BaudRate, AtomicBaudRate, u32, AtomicU32);
+int_like!(DivisorFraction, u32);
+
+#[inline(always)]
+#[allow(dead_code)]
+pub(super) fn uart_manager() -> &'static UartManager {
+    &UartManager
+}
+
+#[derive(Debug)]
+pub(super) struct UartManager;
+
+impl UartManager {
+    /// todo: 把uart设备注册到tty层
+    ///
+    /// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/drivers/tty/serial/serial_core.c?fi=uart_register_driver#2720
+    pub fn register_driver(&self, _driver: &Arc<dyn UartDriver>) -> Result<(), SystemError> {
+        return Ok(());
+    }
+}
+
+pub fn serial_early_init() -> Result<(), SystemError> {
+    serial8250_manager().early_init()?;
+    return Ok(());
+}
+
+pub(super) fn serial_init() -> Result<(), SystemError> {
+    serial8250_manager().init()?;
+    return Ok(());
+}

kernel/src/driver/tty/serial/serial8250/mod.rs

@@ -0,0 +1,543 @@
+use core::{
+    any::Any,
+    sync::atomic::{AtomicBool, AtomicI32, Ordering},
+};
+
+use alloc::{
+    string::{String, ToString},
+    sync::{Arc, Weak},
+    vec::Vec,
+};
+
+use crate::{
+    driver::{
+        base::{
+            device::{
+                bus::Bus, device_manager, driver::Driver, Device, DeviceKObjType, DeviceNumber,
+                DeviceState, DeviceType, IdTable,
+            },
+            kobject::{KObjType, KObject, KObjectState, LockedKObjectState},
+            kset::KSet,
+            platform::{
+                platform_device::{platform_device_manager, PlatformDevice},
+                platform_driver::{platform_driver_manager, PlatformDriver},
+            },
+        },
+        tty::{
+            tty_device::TtyDevice,
+            tty_driver::{TtyDriver, TtyDriverMetadata, TtyDriverOperations},
+        },
+    },
+    filesystem::kernfs::KernFSInode,
+    libs::rwlock::{RwLock, RwLockReadGuard, RwLockWriteGuard},
+    syscall::SystemError,
+};
+
+use self::serial8250_pio::{send_to_serial8250_pio_com1, serial8250_pio_port_early_init};
+
+use super::{uart_manager, UartDriver, UartPort};
+
+mod serial8250_pio;
+
+static mut SERIAL8250_ISA_DEVICES: Option<Arc<Serial8250ISADevices>> = None;
+static mut SERIAL8250_ISA_DRIVER: Option<Arc<Serial8250ISADriver>> = None;
+
+#[inline(always)]
+#[allow(dead_code)]
+fn serial8250_isa_devices() -> &'static Arc<Serial8250ISADevices> {
+    unsafe { SERIAL8250_ISA_DEVICES.as_ref().unwrap() }
+}
+
+#[inline(always)]
+#[allow(dead_code)]
+fn serial8250_isa_driver() -> &'static Arc<Serial8250ISADriver> {
+    unsafe { SERIAL8250_ISA_DRIVER.as_ref().unwrap() }
+}
+
+#[inline(always)]
+pub(super) fn serial8250_manager() -> &'static Serial8250Manager {
+    &Serial8250Manager
+}
+
+#[derive(Debug)]
+pub(super) struct Serial8250Manager;
+
+impl Serial8250Manager {
+    /// 初始化串口设备（在内存管理初始化之前）
+    pub fn early_init(&self) -> Result<(), SystemError> {
+        serial8250_pio_port_early_init()?;
+        return Ok(());
+    }
+
+    /// 初始化serial8250设备、驱动
+    ///
+    /// 应当在设备驱动模型初始化之后调用这里
+    ///
+    /// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/drivers/tty/serial/8250/8250_core.c?r=&mo=30224&fi=1169#1169
+    pub fn init(&self) -> Result<(), SystemError> {
+        // 初始化serial8250 isa设备
+        let serial8250_isa_dev = Serial8250ISADevices::new();
+        unsafe {
+            SERIAL8250_ISA_DEVICES = Some(serial8250_isa_dev.clone());
+        }
+
+        let serial8250_isa_driver = Serial8250ISADriver::new();
+        unsafe {
+            SERIAL8250_ISA_DRIVER = Some(serial8250_isa_driver.clone());
+        }
+        // todo: 把端口绑定到isa_dev、 isa_driver上
+        self.register_ports(&serial8250_isa_driver, &serial8250_isa_dev);
+
+        // todo: 把驱动注册到uart层、tty层
+        uart_manager().register_driver(&(serial8250_isa_driver.clone() as Arc<dyn UartDriver>))?;
+
+        // 注册isa设备到platform总线
+        platform_device_manager()
+            .device_add(serial8250_isa_dev.clone() as Arc<dyn PlatformDevice>)
+            .map_err(|e| {
+                unsafe {
+                    SERIAL8250_ISA_DEVICES = None;
+                }
+                return e;
+            })?;
+
+        // todo: 把驱动注册到platform总线
+        platform_driver_manager()
+            .register(serial8250_isa_driver.clone() as Arc<dyn PlatformDriver>)?;
+
+        return Ok(());
+    }
+
+    /// 把uart端口与uart driver、uart device绑定
+    ///
+    /// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/drivers/tty/serial/8250/8250_core.c?r=&mo=30224&fi=1169#553
+    fn register_ports(
+        &self,
+        uart_driver: &Arc<Serial8250ISADriver>,
+        devs: &Arc<Serial8250ISADevices>,
+    ) {
+        self.bind_pio_ports(uart_driver, devs);
+    }
+
+    /// 把uart端口与uart driver绑定
+    ///
+    /// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/drivers/tty/serial/serial_core.c?fi=uart_add_one_port#3048
+    pub(self) fn uart_add_one_port(
+        &self,
+        _uart_driver: &Arc<Serial8250ISADriver>,
+        _port: &dyn UartPort,
+    ) -> Result<(), SystemError> {
+        return Ok(());
+        // todo!("Serial8250Manager::uart_add_one_port")
+    }
+}
+
+/// 所有的8250串口设备都应该实现的trait
+trait Serial8250Port: UartPort {
+    fn device(&self) -> Option<Arc<Serial8250ISADevices>> {
+        None
+    }
+    fn set_device(&self, device: Option<&Arc<Serial8250ISADevices>>);
+}
+
+#[derive(Debug)]
+#[cast_to([sync] Device, PlatformDevice)]
+struct Serial8250ISADevices {
+    /// 设备id是否自动分配
+    id_auto: AtomicBool,
+    /// 平台设备id
+    id: AtomicI32,
+
+    inner: RwLock<InnerSerial8250ISADevices>,
+    name: &'static str,
+    kobj_state: LockedKObjectState,
+}
+
+impl Serial8250ISADevices {
+    pub fn new() -> Arc<Self> {
+        let r = Arc::new(Self {
+            id_auto: AtomicBool::new(false),
+            id: AtomicI32::new(Serial8250PlatformDeviceID::Legacy as i32),
+            inner: RwLock::new(InnerSerial8250ISADevices::new()),
+            name: "serial8250",
+            kobj_state: LockedKObjectState::new(None),
+        });
+
+        device_manager().device_default_initialize(&(r.clone() as Arc<dyn Device>));
+
+        return r;
+    }
+}
+
+impl PlatformDevice for Serial8250ISADevices {
+    fn compatible_table(&self) -> crate::driver::base::platform::CompatibleTable {
+        unimplemented!()
+    }
+
+    fn pdev_id(&self) -> (i32, bool) {
+        return (
+            self.id.load(Ordering::SeqCst),
+            self.id_auto.load(Ordering::SeqCst),
+        );
+    }
+
+    fn set_pdev_id(&self, id: i32) {
+        self.id.store(id, Ordering::SeqCst);
+    }
+
+    fn set_pdev_id_auto(&self, id_auto: bool) {
+        self.id_auto.store(id_auto, Ordering::SeqCst);
+    }
+
+    fn pdev_name(&self) -> &str {
+        return self.name;
+    }
+
+    fn is_initialized(&self) -> bool {
+        return self.inner.read().device_state == DeviceState::Initialized;
+    }
+
+    fn set_state(&self, set_state: DeviceState) {
+        self.inner.write().device_state = set_state;
+    }
+}
+
+impl Device for Serial8250ISADevices {
+    fn is_dead(&self) -> bool {
+        false
+    }
+    fn bus(&self) -> Option<Arc<dyn Bus>> {
+        self.inner.read().bus.clone()
+    }
+
+    fn set_bus(&self, bus: Option<Arc<dyn Bus>>) {
+        self.inner.write().bus = bus;
+    }
+
+    fn dev_type(&self) -> DeviceType {
+        DeviceType::Serial
+    }
+
+    fn id_table(&self) -> IdTable {
+        return IdTable::new(self.name.to_string(), DeviceNumber::new(0));
+    }
+
+    fn driver(&self) -> Option<Arc<dyn Driver>> {
+        self.inner.read().driver.clone()?.upgrade()
+    }
+
+    fn set_driver(&self, driver: Option<Weak<dyn Driver>>) {
+        self.inner.write().driver = driver;
+    }
+
+    fn can_match(&self) -> bool {
+        self.inner.read().can_match
+    }
+
+    fn set_can_match(&self, can_match: bool) {
+        self.inner.write().can_match = can_match;
+    }
+
+    fn state_synced(&self) -> bool {
+        true
+    }
+}
+
+impl KObject for Serial8250ISADevices {
+    fn as_any_ref(&self) -> &dyn Any {
+        self
+    }
+
+    fn set_inode(&self, inode: Option<Arc<KernFSInode>>) {
+        self.inner.write().inode = inode;
+    }
+
+    fn inode(&self) -> Option<Arc<KernFSInode>> {
+        self.inner.read().inode.clone()
+    }
+
+    fn parent(&self) -> Option<Weak<dyn KObject>> {
+        self.inner.read().parent_kobj.clone()
+    }
+
+    fn set_parent(&self, parent: Option<Weak<dyn KObject>>) {
+        self.inner.write().parent_kobj = parent;
+    }
+
+    fn kset(&self) -> Option<Arc<KSet>> {
+        self.inner.read().kset.clone()
+    }
+
+    fn set_kset(&self, kset: Option<Arc<KSet>>) {
+        self.inner.write().kset = kset;
+    }
+
+    fn kobj_type(&self) -> Option<&'static dyn KObjType> {
+        Some(&DeviceKObjType)
+    }
+
+    fn set_kobj_type(&self, _ktype: Option<&'static dyn KObjType>) {
+        todo!()
+    }
+
+    fn name(&self) -> String {
+        self.name.to_string()
+    }
+
+    fn set_name(&self, _name: String) {}
+
+    fn kobj_state(&self) -> RwLockReadGuard<KObjectState> {
+        self.kobj_state.read()
+    }
+
+    fn kobj_state_mut(&self) -> RwLockWriteGuard<KObjectState> {
+        self.kobj_state.write()
+    }
+
+    fn set_kobj_state(&self, state: KObjectState) {
+        *self.kobj_state.write() = state;
+    }
+}
+
+#[derive(Debug)]
+struct InnerSerial8250ISADevices {
+    /// 当前设备所述的kset
+    kset: Option<Arc<KSet>>,
+    parent_kobj: Option<Weak<dyn KObject>>,
+    /// 当前设备所述的总线
+    bus: Option<Arc<dyn Bus>>,
+    inode: Option<Arc<KernFSInode>>,
+    driver: Option<Weak<dyn Driver>>,
+    device_state: DeviceState,
+    can_match: bool,
+}
+
+impl InnerSerial8250ISADevices {
+    fn new() -> Self {
+        Self {
+            kset: None,
+            parent_kobj: None,
+            bus: None,
+            inode: None,
+            driver: None,
+            device_state: DeviceState::NotInitialized,
+            can_match: false,
+        }
+    }
+}
+
+/// Serial 8250平台设备的id
+/// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/include/linux/serial_8250.h?fi=PLAT8250_DEV_LEGACY#49
+#[derive(Debug)]
+#[repr(i32)]
+enum Serial8250PlatformDeviceID {
+    Legacy = -1,
+}
+
+#[derive(Debug)]
+
+struct InnerSerial8250ISADriver {
+    bus: Option<Arc<dyn Bus>>,
+    kobj_type: Option<&'static dyn KObjType>,
+    kset: Option<Arc<KSet>>,
+    parent_kobj: Option<Weak<dyn KObject>>,
+    kern_inode: Option<Arc<KernFSInode>>,
+    devices: Vec<Arc<dyn Device>>,
+}
+
+impl InnerSerial8250ISADriver {
+    fn new() -> Self {
+        Self {
+            bus: None,
+            kobj_type: None,
+            kset: None,
+            parent_kobj: None,
+            kern_inode: None,
+            devices: Vec::new(),
+        }
+    }
+}
+
+#[derive(Debug)]
+#[cast_to([sync] Driver, PlatformDriver)]
+struct Serial8250ISADriver {
+    inner: RwLock<InnerSerial8250ISADriver>,
+    name: &'static str,
+    kobj_state: LockedKObjectState,
+    self_ref: Weak<Self>,
+}
+
+impl Serial8250ISADriver {
+    pub fn new() -> Arc<Self> {
+        let r = Arc::new(Self {
+            inner: RwLock::new(InnerSerial8250ISADriver::new()),
+            name: "serial8250",
+            kobj_state: LockedKObjectState::new(None),
+            self_ref: Weak::default(),
+        });
+
+        unsafe {
+            let p = r.as_ref() as *const Self as *mut Self;
+            (*p).self_ref = Arc::downgrade(&r);
+        }
+
+        return r;
+    }
+}
+
+impl TtyDriver for Serial8250ISADriver {
+    fn driver_name(&self) -> &str {
+        self.name
+    }
+
+    fn dev_name(&self) -> &str {
+        todo!()
+    }
+
+    fn metadata(&self) -> &TtyDriverMetadata {
+        todo!()
+    }
+
+    fn other(&self) -> Option<&Arc<dyn TtyDriver>> {
+        todo!()
+    }
+
+    fn ttys(&self) -> &[Arc<TtyDevice>] {
+        todo!()
+    }
+
+    fn tty_ops(&self) -> Option<&'static dyn TtyDriverOperations> {
+        None
+    }
+}
+
+impl UartDriver for Serial8250ISADriver {
+    fn device_number(&self) -> DeviceNumber {
+        todo!()
+    }
+
+    fn max_devs_num(&self) -> i32 {
+        todo!()
+    }
+}
+
+impl PlatformDriver for Serial8250ISADriver {
+    fn probe(&self, device: &Arc<dyn PlatformDevice>) -> Result<(), SystemError> {
+        let isa_dev = device
+            .clone()
+            .arc_any()
+            .downcast::<Serial8250ISADevices>()
+            .map_err(|_| {
+                kerror!("Serial8250ISADriver::probe: device is not a Serial8250ISADevices");
+                SystemError::EINVAL
+            })?;
+        isa_dev.set_driver(Some(self.self_ref.clone()));
+
+        return Ok(());
+    }
+
+    fn remove(&self, _device: &Arc<dyn PlatformDevice>) -> Result<(), SystemError> {
+        todo!()
+    }
+
+    fn shutdown(&self, _device: &Arc<dyn PlatformDevice>) -> Result<(), SystemError> {
+        todo!()
+    }
+
+    fn suspend(&self, _device: &Arc<dyn PlatformDevice>) -> Result<(), SystemError> {
+        todo!()
+    }
+
+    fn resume(&self, _device: &Arc<dyn PlatformDevice>) -> Result<(), SystemError> {
+        todo!()
+    }
+}
+
+impl Driver for Serial8250ISADriver {
+    fn id_table(&self) -> Option<IdTable> {
+        None
+    }
+
+    fn devices(&self) -> Vec<Arc<dyn Device>> {
+        self.inner.read().devices.clone()
+    }
+
+    fn add_device(&self, device: Arc<dyn Device>) {
+        self.inner.write().devices.push(device);
+    }
+
+    fn delete_device(&self, device: &Arc<dyn Device>) {
+        let mut inner = self.inner.write();
+
+        inner.devices.drain_filter(|d| Arc::ptr_eq(d, device));
+    }
+
+    fn bus(&self) -> Option<Arc<dyn Bus>> {
+        self.inner.read().bus.clone()
+    }
+
+    fn set_bus(&self, bus: Option<Arc<dyn Bus>>) {
+        self.inner.write().bus = bus;
+    }
+}
+
+impl KObject for Serial8250ISADriver {
+    fn as_any_ref(&self) -> &dyn core::any::Any {
+        self
+    }
+
+    fn set_inode(&self, inode: Option<Arc<KernFSInode>>) {
+        self.inner.write().kern_inode = inode;
+    }
+
+    fn inode(&self) -> Option<Arc<KernFSInode>> {
+        self.inner.read().kern_inode.clone()
+    }
+
+    fn parent(&self) -> Option<Weak<dyn KObject>> {
+        self.inner.read().parent_kobj.clone()
+    }
+
+    fn set_parent(&self, parent: Option<Weak<dyn KObject>>) {
+        self.inner.write().parent_kobj = parent;
+    }
+
+    fn kset(&self) -> Option<Arc<KSet>> {
+        self.inner.read().kset.clone()
+    }
+
+    fn set_kset(&self, kset: Option<Arc<KSet>>) {
+        self.inner.write().kset = kset;
+    }
+
+    fn kobj_type(&self) -> Option<&'static dyn KObjType> {
+        self.inner.read().kobj_type.clone()
+    }
+
+    fn set_kobj_type(&self, ktype: Option<&'static dyn KObjType>) {
+        self.inner.write().kobj_type = ktype;
+    }
+
+    fn name(&self) -> String {
+        "serial8250".to_string()
+    }
+
+    fn set_name(&self, _name: String) {}
+
+    fn kobj_state(&self) -> RwLockReadGuard<KObjectState> {
+        self.kobj_state.read()
+    }
+
+    fn kobj_state_mut(&self) -> RwLockWriteGuard<KObjectState> {
+        self.kobj_state.write()
+    }
+
+    fn set_kobj_state(&self, state: KObjectState) {
+        *self.kobj_state.write() = state;
+    }
+}
+
+/// 临时函数，用于向默认的串口发送数据
+pub fn send_to_default_serial8250_port(s: &[u8]) {
+    send_to_serial8250_pio_com1(s);
+}

kernel/src/driver/tty/serial/serial8250/serial8250_pio.rs

@@ -0,0 +1,297 @@
+//! PIO的串口驱动
+
+use core::{
+    hint::spin_loop,
+    sync::atomic::{AtomicBool, Ordering},
+};
+
+use alloc::sync::{Arc, Weak};
+
+use crate::{
+    arch::{io::PortIOArch, CurrentPortIOArch},
+    driver::tty::serial::{AtomicBaudRate, BaudRate, DivisorFraction, UartPort},
+    libs::rwlock::RwLock,
+    syscall::SystemError,
+};
+
+use super::{Serial8250ISADevices, Serial8250ISADriver, Serial8250Manager, Serial8250Port};
+
+static mut PIO_PORTS: [Option<Serial8250PIOPort>; 8] =
+    [None, None, None, None, None, None, None, None];
+
+impl Serial8250Manager {
+    pub(super) fn bind_pio_ports(
+        &self,
+        uart_driver: &Arc<Serial8250ISADriver>,
+        devs: &Arc<Serial8250ISADevices>,
+    ) {
+        for i in 0..8 {
+            if let Some(port) = unsafe { PIO_PORTS[i].as_ref() } {
+                port.set_device(Some(devs));
+                self.uart_add_one_port(uart_driver, port).ok();
+            }
+        }
+    }
+}
+
+macro_rules! init_port {
+    ($port_num:expr, $baudrate:expr) => {
+        unsafe {
+            let port = Serial8250PIOPort::new(
+                match $port_num {
+                    1 => Serial8250PortBase::COM1,
+                    2 => Serial8250PortBase::COM2,
+                    3 => Serial8250PortBase::COM3,
+                    4 => Serial8250PortBase::COM4,
+                    5 => Serial8250PortBase::COM5,
+                    6 => Serial8250PortBase::COM6,
+                    7 => Serial8250PortBase::COM7,
+                    8 => Serial8250PortBase::COM8,
+                    _ => panic!("invalid port number"),
+                },
+                BaudRate::new($baudrate),
+            );
+            if let Ok(port) = port {
+                if port.init().is_ok() {
+                    PIO_PORTS[$port_num - 1] = Some(port);
+                }
+            }
+        }
+    };
+}
+
+/// 在内存管理初始化之前，初始化串口设备
+pub(super) fn serial8250_pio_port_early_init() -> Result<(), SystemError> {
+    for i in 1..=8 {
+        init_port!(i, 115200);
+    }
+    return Ok(());
+}
+
+#[derive(Debug)]
+pub struct Serial8250PIOPort {
+    iobase: Serial8250PortBase,
+    baudrate: AtomicBaudRate,
+    initialized: AtomicBool,
+    inner: RwLock<Serial8250PIOPortInner>,
+}
+
+impl Serial8250PIOPort {
+    const SERIAL8250PIO_MAX_BAUD_RATE: BaudRate = BaudRate::new(115200);
+    pub fn new(iobase: Serial8250PortBase, baudrate: BaudRate) -> Result<Self, SystemError> {
+        let r = Self {
+            iobase,
+            baudrate: AtomicBaudRate::new(baudrate),
+            initialized: AtomicBool::new(false),
+            inner: RwLock::new(Serial8250PIOPortInner::new()),
+        };
+
+        if let Err(e) = r.check_baudrate(&baudrate) {
+            return Err(e);
+        }
+
+        return Ok(r);
+    }
+
+    pub fn init(&self) -> Result<(), SystemError> {
+        let r = self
+            .initialized
+            .compare_exchange(false, true, Ordering::SeqCst, Ordering::SeqCst);
+        if r.is_err() {
+            // 已经初始化
+            return Ok(());
+        }
+
+        let port = self.iobase as u16;
+
+        unsafe {
+            CurrentPortIOArch::out8(port + 1, 0x00); // Disable all interrupts
+            self.set_divisor(self.baudrate.load(Ordering::SeqCst))
+                .unwrap(); // Set baud rate
+
+            CurrentPortIOArch::out8(port + 2, 0xC7); // Enable FIFO, clear them, with 14-byte threshold
+            CurrentPortIOArch::out8(port + 4, 0x08); // IRQs enabled, RTS/DSR clear (现代计算机上一般都不需要hardware flow control，因此不需要置位RTS/DSR)
+            CurrentPortIOArch::out8(port + 4, 0x1E); // Set in loopback mode, test the serial chip
+            CurrentPortIOArch::out8(port + 0, 0xAE); // Test serial chip (send byte 0xAE and check if serial returns same byte)
+
+            // Check if serial is faulty (i.e: not same byte as sent)
+            if CurrentPortIOArch::in8(port + 0) != 0xAE {
+                self.initialized.store(false, Ordering::SeqCst);
+                return Err(SystemError::ENODEV);
+            }
+
+            // If serial is not faulty set it in normal operation mode
+            // (not-loopback with IRQs enabled and OUT#1 and OUT#2 bits enabled)
+            CurrentPortIOArch::out8(port + 4, 0x08);
+        }
+
+        return Ok(());
+        /*
+                Notice that the initialization code above writes to [PORT + 1]
+            twice with different values. This is once to write to the Divisor
+            register along with [PORT + 0] and once to write to the Interrupt
+            register as detailed in the previous section.
+                The second write to the Line Control register [PORT + 3]
+            clears the DLAB again as well as setting various other bits.
+        */
+    }
+
+    const fn check_baudrate(&self, baudrate: &BaudRate) -> Result<(), SystemError> {
+        // 错误的比特率
+        if baudrate.data() > Self::SERIAL8250PIO_MAX_BAUD_RATE.data()
+            || Self::SERIAL8250PIO_MAX_BAUD_RATE.data() % baudrate.data() != 0
+        {
+            return Err(SystemError::EINVAL);
+        }
+
+        return Ok(());
+    }
+
+    #[allow(dead_code)]
+    fn serial_received(&self) -> bool {
+        if self.serial_in(5) & 1 != 0 {
+            true
+        } else {
+            false
+        }
+    }
+
+    fn is_transmit_empty(&self) -> bool {
+        if self.serial_in(5) & 0x20 != 0 {
+            true
+        } else {
+            false
+        }
+    }
+
+    /// 发送字节
+    ///
+    /// ## 参数
+    ///
+    /// - `s`：待发送的字节
+    fn send_bytes(&self, s: &[u8]) {
+        while self.is_transmit_empty() == false {
+            spin_loop();
+        }
+
+        for c in s {
+            self.serial_out(0, (*c).into());
+        }
+    }
+
+    /// 读取一个字节
+    #[allow(dead_code)]
+    fn read_one_byte(&self) -> u8 {
+        while self.serial_received() == false {
+            spin_loop();
+        }
+        return self.serial_in(0) as u8;
+    }
+}
+
+impl Serial8250Port for Serial8250PIOPort {
+    fn device(&self) -> Option<Arc<Serial8250ISADevices>> {
+        self.inner.read().device()
+    }
+
+    fn set_device(&self, device: Option<&Arc<Serial8250ISADevices>>) {
+        self.inner.write().set_device(device);
+    }
+}
+
+impl UartPort for Serial8250PIOPort {
+    fn serial_in(&self, offset: u32) -> u32 {
+        unsafe { CurrentPortIOArch::in8(self.iobase as u16 + offset as u16).into() }
+    }
+
+    fn serial_out(&self, offset: u32, value: u32) {
+        // warning: pio的串口只能写入8位，因此这里丢弃高24位
+        unsafe { CurrentPortIOArch::out8(self.iobase as u16 + offset as u16, value as u8) }
+    }
+
+    fn divisor(&self, baud: BaudRate) -> (u32, DivisorFraction) {
+        let divisor = Self::SERIAL8250PIO_MAX_BAUD_RATE.data() / baud.data();
+        return (divisor, DivisorFraction::new(0));
+    }
+
+    fn set_divisor(&self, baud: BaudRate) -> Result<(), SystemError> {
+        self.check_baudrate(&baud)?;
+
+        let port = self.iobase as u16;
+        unsafe {
+            CurrentPortIOArch::out8(port + 3, 0x80); // Enable DLAB (set baud rate divisor)
+
+            let divisor = self.divisor(baud).0;
+
+            CurrentPortIOArch::out8(port + 0, (divisor & 0xff) as u8); // Set divisor  (lo byte)
+            CurrentPortIOArch::out8(port + 1, ((divisor >> 8) & 0xff) as u8); // (hi byte)
+            CurrentPortIOArch::out8(port + 3, 0x03); // 8 bits, no parity, one stop bit
+        }
+
+        self.baudrate.store(baud, Ordering::SeqCst);
+
+        return Ok(());
+    }
+
+    fn startup(&self) -> Result<(), SystemError> {
+        todo!("serial8250_pio::startup")
+    }
+
+    fn shutdown(&self) {
+        todo!("serial8250_pio::shutdown")
+    }
+
+    fn baud_rate(&self) -> Option<BaudRate> {
+        Some(self.baudrate.load(Ordering::SeqCst))
+    }
+
+    fn handle_irq(&self) -> Result<(), SystemError> {
+        todo!("serial8250_pio::handle_irq")
+    }
+}
+
+#[derive(Debug)]
+struct Serial8250PIOPortInner {
+    /// 当前端口绑定的设备
+    ///
+    /// ps: 存储weak以避免循环引用
+    device: Option<Weak<Serial8250ISADevices>>,
+}
+
+impl Serial8250PIOPortInner {
+    pub const fn new() -> Self {
+        Self { device: None }
+    }
+
+    pub fn device(&self) -> Option<Arc<Serial8250ISADevices>> {
+        if let Some(device) = self.device.as_ref() {
+            return device.upgrade();
+        }
+        return None;
+    }
+
+    fn set_device(&mut self, device: Option<&Arc<Serial8250ISADevices>>) {
+        self.device = device.map(|d| Arc::downgrade(d));
+    }
+}
+
+#[allow(dead_code)]
+#[repr(u16)]
+#[derive(Clone, Debug, Copy)]
+pub enum Serial8250PortBase {
+    COM1 = 0x3f8,
+    COM2 = 0x2f8,
+    COM3 = 0x3e8,
+    COM4 = 0x2e8,
+    COM5 = 0x5f8,
+    COM6 = 0x4f8,
+    COM7 = 0x5e8,
+    COM8 = 0x4e8,
+}
+
+/// 临时函数，用于向COM1发送数据
+pub fn send_to_serial8250_pio_com1(s: &[u8]) {
+    if let Some(port) = unsafe { PIO_PORTS[0].as_ref() } {
+        port.send_bytes(s);
+    }
+}

kernel/src/driver/tty/tty_device.rs

@@ -20,7 +20,7 @@ use crate::{
     syscall::SystemError,
 };
 
-use super::{TtyCore, TtyError, TtyFileFlag, TtyFilePrivateData};
+use super::{serial::serial_init, TtyCore, TtyError, TtyFileFlag, TtyFilePrivateData};
 
 lazy_static! {
     /// 所有TTY设备的B树。用于根据名字，找到Arc<TtyDevice>
@@ -283,17 +283,6 @@ impl TtyDevicePrivateData {
     }
 }
 
-/// @brief 导出到C的tty初始化函数
-#[no_mangle]
-pub extern "C" fn rs_tty_init() -> i32 {
-    let r = tty_init();
-    if r.is_ok() {
-        return 0;
-    } else {
-        return r.unwrap_err().to_posix_errno();
-    }
-}
-
 /// @brief 初始化TTY设备
 pub fn tty_init() -> Result<(), SystemError> {
     let tty: Arc<TtyDevice> = TtyDevice::new("tty0");
@@ -322,5 +311,6 @@ pub fn tty_init() -> Result<(), SystemError> {
         return Err(devfs_root_inode.unwrap_err());
     }
 
+    serial_init()?;
     return Ok(());
 }

kernel/src/driver/tty/tty_driver.rs

@@ -0,0 +1,61 @@
+use core::fmt::Debug;
+
+use alloc::sync::Arc;
+
+use crate::driver::base::device::driver::Driver;
+
+use super::tty_device::TtyDevice;
+
+/// TTY 驱动
+///
+///
+/// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/include/linux/tty_driver.h#434
+pub trait TtyDriver: Debug + Send + Sync + Driver {
+    fn driver_name(&self) -> &str;
+    fn dev_name(&self) -> &str;
+
+    fn metadata(&self) -> &TtyDriverMetadata;
+
+    fn other(&self) -> Option<&Arc<dyn TtyDriver>>;
+
+    fn ttys(&self) -> &[Arc<TtyDevice>];
+
+    fn tty_ops(&self) -> Option<&'static dyn TtyDriverOperations> {
+        None
+    }
+}
+
+#[derive(Debug, Clone, Copy)]
+#[allow(dead_code)]
+pub struct TtyDriverMetadata {
+    ///  name of the driver used in /proc/tty
+    driver_name: &'static str,
+    /// used for constructing /dev node name
+    dev_name: &'static str,
+    /// used as a number base for constructing /dev node name
+    name_base: i32,
+    /// major /dev device number (zero for autoassignment)
+    major: i32,
+    /// the first minor /dev device number
+    minor_start: i32,
+    drv_type: TtyDriverType,
+    subtype: TtyDriverSubtype,
+}
+
+/// https://opengrok.ringotek.cn/xref/linux-6.1.9/include/linux/tty_driver.h#411
+#[derive(Debug, Clone, Copy)]
+pub enum TtyDriverType {}
+
+/// https://opengrok.ringotek.cn/xref/linux-6.1.9/include/linux/tty_driver.h#412
+#[derive(Debug, Clone, Copy)]
+pub enum TtyDriverSubtype {}
+
+bitflags! {
+    /// https://opengrok.ringotek.cn/xref/linux-6.1.9/include/linux/tty_driver.h?fi=SERIAL_TYPE_NORMAL#492
+    pub struct TtyDriverFlags: u64 {
+
+    }
+}
+
+/// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/include/linux/tty_driver.h#350
+pub trait TtyDriverOperations {}

kernel/src/driver/uart/mod.rs

@@ -1,2 +0,0 @@
-pub mod uart_device;
-pub mod uart_driver;

kernel/src/driver/uart/uart.h

@@ -1,17 +0,0 @@
-#include <common/glib.h>
-
-//driver/uart/uart.rs --rust function
-enum uart_port_io_addr
-{
-    COM1 = 0x3f8,
-    COM2 = 0x2f8,
-    COM3 = 0x3e8,
-    COM4 = 0x2e8,
-    COM5 = 0x5f8,
-    COM6 = 0x4f8,
-    COM7 = 0x5e8,
-    COM8 = 0x4E8,
-};
-extern int c_uart_init(uint16_t port, uint32_t baud_rate);
-extern void c_uart_send(uint16_t port, char c);
-extern void c_uart_send_str(uint16_t port, const char *str);

kernel/src/driver/uart/uart_device.rs

@@ -1,805 +0,0 @@
-use crate::{
-    driver::{
-        base::{
-            char::CharDevice,
-            device::{
-                bus::Bus, driver::DriverError, Device, DeviceError, DeviceNumber,
-                DevicePrivateData, DeviceResource, DeviceState, DeviceType, IdTable,
-            },
-            kobject::{KObjType, KObject, KObjectState},
-            kset::KSet,
-            platform::{
-                platform_device::PlatformDevice, platform_driver::PlatformDriver, CompatibleTable,
-            },
-        },
-        Driver,
-    },
-    filesystem::{
-        devfs::{devfs_register, DevFS, DeviceINode},
-        kernfs::KernFSInode,
-        vfs::{
-            syscall::ModeType, FilePrivateData, FileSystem, FileType, IndexNode, Metadata,
-            PollStatus,
-        },
-    },
-    include::bindings::bindings::{io_in8, io_out8},
-    kinfo,
-    libs::{
-        rwlock::{RwLockReadGuard, RwLockWriteGuard},
-        spinlock::SpinLock,
-    },
-    syscall::SystemError,
-};
-use alloc::{
-    string::{String, ToString},
-    sync::{Arc, Weak},
-    vec::Vec,
-};
-use core::{
-    any::Any,
-    char,
-    intrinsics::offset,
-    str::{self, from_utf8},
-};
-
-const UART_SUCCESS: i32 = 0;
-const E_UART_BITS_RATE_ERROR: i32 = 1;
-const E_UART_SERIAL_FAULT: i32 = 2;
-const UART_MAX_BITS_RATE: u32 = 115200;
-
-lazy_static! {
-    // 串口设备
-    pub static ref UART_DEV: Arc<LockedUart> = Arc::new(LockedUart::default());
-    // 串口驱动
-    pub static ref UART_DRV: Arc<LockedUartDriver> = Arc::new(LockedUartDriver::default());
-}
-
-// @brief 串口端口
-#[allow(dead_code)]
-#[repr(u16)]
-#[derive(Clone, Debug)]
-pub enum UartPort {
-    COM1 = 0x3f8,
-    COM2 = 0x2f8,
-    COM3 = 0x3e8,
-    COM4 = 0x2e8,
-    COM5 = 0x5f8,
-    COM6 = 0x4f8,
-    COM7 = 0x5e8,
-    COM8 = 0x4e8,
-}
-
-impl UartPort {
-    ///@brief 将u16转换为UartPort枚举类型
-    ///@param val 要转换的u16类型
-    ///@return 输入的端口地址正确，返回UartPort类型，错误，返回错误信息
-    #[allow(dead_code)]
-    pub fn from_u16(val: u16) -> Result<Self, &'static str> {
-        match val {
-            0x3f8 => Ok(Self::COM1),
-            0x2f8 => Ok(Self::COM2),
-            0x3e8 => Ok(Self::COM3),
-            0x2e8 => Ok(Self::COM4),
-            0x5f8 => Ok(Self::COM5),
-            0x4f8 => Ok(Self::COM6),
-            0x5e8 => Ok(Self::COM7),
-            0x4e8 => Ok(Self::COM8),
-            _ => Err("port error!"),
-        }
-    }
-
-    ///@brief 将UartPort枚举类型转换为u16类型
-    ///@param self 要转换的UartPort
-    ///@return 转换的u16值
-    #[allow(dead_code)]
-    pub fn to_u16(self: &Self) -> u16 {
-        match self {
-            Self::COM1 => 0x3f8,
-            Self::COM2 => 0x2f8,
-            Self::COM3 => 0x3e8,
-            Self::COM4 => 0x2e8,
-            Self::COM5 => 0x5f8,
-            Self::COM6 => 0x4f8,
-            Self::COM7 => 0x5e8,
-            Self::COM8 => 0x4e8,
-        }
-    }
-}
-
-// @brief 串口寄存器
-#[allow(dead_code)]
-#[repr(C)]
-#[derive(Debug, Copy, Clone)]
-struct UartRegister {
-    reg_data: u8,
-    reg_interrupt_enable: u8,
-    reg_ii_fifo: u8, // 	Interrupt Identification and FIFO control registers
-    reg_line_config: u8,
-    reg_modem_config: u8,
-    reg_line_status: u8,
-    reg_modem_statue: u8,
-    reg_scartch: u8,
-}
-
-// @brief 串口设备结构体
-#[derive(Debug)]
-pub struct Uart {
-    private_data: DevicePrivateData, // 设备状态
-    fs: Weak<DevFS>,                 // 文件系统
-    port: UartPort,
-    baud_rate: u32,
-    metadata: Metadata,
-}
-
-impl Default for Uart {
-    fn default() -> Self {
-        let mut metadata = Metadata::default();
-        metadata.file_type = FileType::CharDevice;
-        c_uart_init(UartPort::COM1.to_u16(), 115200);
-        Self {
-            private_data: DevicePrivateData::new(
-                IdTable::new(
-                    "uart".to_string(),
-                    DeviceNumber::new(DeviceNumber::from_major_minor(4, 64)),
-                ),
-                None,
-                CompatibleTable::new(vec!["uart"]),
-                DeviceState::NotInitialized,
-            ),
-            fs: Weak::default(),
-            port: UartPort::COM1,
-            baud_rate: 115200,
-            metadata,
-        }
-    }
-}
-
-// @brief 串口设备结构体(加锁)
-#[derive(Debug)]
-pub struct LockedUart(SpinLock<Uart>);
-
-impl Default for LockedUart {
-    fn default() -> Self {
-        Self(SpinLock::new(Uart::default()))
-    }
-}
-
-impl KObject for LockedUart {
-    fn as_any_ref(&self) -> &dyn core::any::Any {
-        self
-    }
-
-    fn inode(&self) -> Option<Arc<KernFSInode>> {
-        todo!()
-    }
-
-    fn kobj_type(&self) -> Option<&'static dyn KObjType> {
-        todo!()
-    }
-
-    fn kset(&self) -> Option<Arc<KSet>> {
-        todo!()
-    }
-
-    fn parent(&self) -> Option<Weak<dyn KObject>> {
-        todo!()
-    }
-
-    fn set_inode(&self, _inode: Option<Arc<KernFSInode>>) {
-        todo!()
-    }
-
-    fn kobj_state(&self) -> RwLockReadGuard<KObjectState> {
-        todo!()
-    }
-
-    fn kobj_state_mut(&self) -> RwLockWriteGuard<KObjectState> {
-        todo!()
-    }
-
-    fn set_kobj_state(&self, _state: KObjectState) {
-        todo!()
-    }
-
-    fn name(&self) -> alloc::string::String {
-        todo!()
-    }
-
-    fn set_name(&self, _name: alloc::string::String) {
-        todo!()
-    }
-
-    fn set_kset(&self, _kset: Option<Arc<KSet>>) {
-        todo!()
-    }
-
-    fn set_parent(&self, _parent: Option<Weak<dyn KObject>>) {
-        todo!()
-    }
-}
-
-impl PlatformDevice for LockedUart {
-    fn is_initialized(&self) -> bool {
-        let state = self.0.lock().private_data.state();
-        match state {
-            DeviceState::Initialized => true,
-            _ => false,
-        }
-    }
-
-    fn set_state(&self, set_state: DeviceState) {
-        self.0.lock().private_data.set_state(set_state);
-    }
-
-    fn compatible_table(&self) -> CompatibleTable {
-        return self.0.lock().private_data.compatible_table().clone();
-    }
-}
-
-impl Device for LockedUart {
-    fn id_table(&self) -> IdTable {
-        return IdTable::new(
-            "uart".to_string(),
-            DeviceNumber::new(DeviceNumber::from_major_minor(4, 64)),
-        );
-    }
-
-    fn dev_type(&self) -> DeviceType {
-        DeviceType::Serial
-    }
-
-    fn bus(&self) -> Option<Arc<dyn Bus>> {
-        todo!("LockedUart::bus()")
-    }
-
-    fn driver(&self) -> Option<Arc<dyn Driver>> {
-        todo!("LockedUart::driver()")
-    }
-
-    fn is_dead(&self) -> bool {
-        false
-    }
-
-    fn set_driver(&self, _driver: Option<Arc<dyn Driver>>) {
-        todo!("LockedUart::set_driver()")
-    }
-}
-
-impl CharDevice for LockedUart {
-    fn read(&self, len: usize, buf: &mut [u8]) -> Result<usize, SystemError> {
-        let device = self.0.lock();
-        if len > buf.len() {
-            return Err(SystemError::E2BIG);
-        }
-        kinfo!("------len:  {:?}", len);
-        for i in 0..len {
-            buf[i] = Self::uart_read_byte(&device.port) as u8;
-            kinfo!("------buf[{:?}] = {:?}", i, buf[i]);
-        }
-        return Ok(len);
-    }
-
-    fn write(&self, len: usize, buf: &[u8]) -> Result<usize, SystemError> {
-        let device = self.0.lock();
-        if len > buf.len() {
-            return Err(SystemError::E2BIG);
-        }
-        Self::uart_send(
-            &device.port,
-            from_utf8(&buf[0..len]).map_err(|_| SystemError::EIO)?,
-        );
-
-        return Ok(len);
-    }
-
-    fn sync(&self) -> Result<(), SystemError> {
-        todo!()
-    }
-}
-
-// impl TtyDevice for LockedUart {
-//     fn ioctl(&self, cmd: String) -> Result<(), DeviceError> {
-//         //TODO 补充详细信息
-//         Err(DeviceError::UnsupportedOperation)
-//     }
-//     fn state(&self) -> Result<TtyState, TtyError> {
-//         todo!()
-//     }
-// }
-
-impl IndexNode for LockedUart {
-    fn read_at(
-        &self,
-        _offset: usize,
-        len: usize,
-        buf: &mut [u8],
-        _data: &mut FilePrivateData,
-    ) -> Result<usize, SystemError> {
-        CharDevice::read(self, len, buf)
-    }
-
-    fn write_at(
-        &self,
-        _offset: usize,
-        len: usize,
-        buf: &[u8],
-        _data: &mut FilePrivateData,
-    ) -> Result<usize, SystemError> {
-        CharDevice::write(self, len, buf)
-    }
-
-    fn poll(&self) -> Result<PollStatus, SystemError> {
-        todo!()
-    }
-
-    fn fs(&self) -> Arc<dyn FileSystem> {
-        return self
-            .0
-            .lock()
-            .fs
-            .clone()
-            .upgrade()
-            .expect("DevFS is not initialized inside Uart Device");
-    }
-
-    fn as_any_ref(&self) -> &dyn Any {
-        todo!()
-    }
-
-    fn list(&self) -> Result<Vec<String>, SystemError> {
-        todo!()
-    }
-
-    fn metadata(&self) -> Result<Metadata, SystemError> {
-        return Ok(self.0.lock().metadata.clone());
-    }
-
-    fn open(
-        &self,
-        _data: &mut FilePrivateData,
-        _mode: &crate::filesystem::vfs::file::FileMode,
-    ) -> Result<(), SystemError> {
-        // 若文件系统没有实现此方法，则返回“不支持”
-        return Ok(());
-    }
-
-    fn close(&self, _data: &mut FilePrivateData) -> Result<(), SystemError> {
-        // 若文件系统没有实现此方法，则返回“不支持”
-        return Ok(());
-    }
-
-    fn set_metadata(&self, _metadata: &Metadata) -> Result<(), SystemError> {
-        // 若文件系统没有实现此方法，则返回“不支持”
-        return Ok(self.0.lock().metadata = _metadata.clone());
-    }
-    fn create(
-        &self,
-        name: &str,
-        file_type: FileType,
-        mode: ModeType,
-    ) -> Result<Arc<dyn IndexNode>, SystemError> {
-        // 若文件系统没有实现此方法，则默认调用其create_with_data方法。如果仍未实现，则会得到一个Err(-EOPNOTSUPP_OR_ENOTSUP)的返回值
-        return self.create_with_data(name, file_type, mode, 0);
-    }
-
-    fn create_with_data(
-        &self,
-        _name: &str,
-        _file_type: FileType,
-        _mode: ModeType,
-        _data: usize,
-    ) -> Result<Arc<dyn IndexNode>, SystemError> {
-        // 若文件系统没有实现此方法，则返回“不支持”
-        return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
-    }
-
-    fn link(&self, _name: &str, _other: &Arc<dyn IndexNode>) -> Result<(), SystemError> {
-        // 若文件系统没有实现此方法，则返回“不支持”
-        return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
-    }
-
-    fn unlink(&self, _name: &str) -> Result<(), SystemError> {
-        // 若文件系统没有实现此方法，则返回“不支持”
-        return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
-    }
-
-    fn rmdir(&self, _name: &str) -> Result<(), SystemError> {
-        return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
-    }
-
-    fn move_(
-        &self,
-        _old_name: &str,
-        _target: &Arc<dyn IndexNode>,
-        _new_name: &str,
-    ) -> Result<(), SystemError> {
-        // 若文件系统没有实现此方法，则返回“不支持”
-        return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
-    }
-
-    fn find(&self, _name: &str) -> Result<Arc<dyn IndexNode>, SystemError> {
-        // 若文件系统没有实现此方法，则返回“不支持”
-        return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
-    }
-
-    fn get_entry_name(&self, _ino: crate::filesystem::vfs::InodeId) -> Result<String, SystemError> {
-        // 若文件系统没有实现此方法，则返回“不支持”
-        return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
-    }
-
-    fn get_entry_name_and_metadata(
-        &self,
-        ino: crate::filesystem::vfs::InodeId,
-    ) -> Result<(String, Metadata), SystemError> {
-        // 如果有条件，请在文件系统中使用高效的方式实现本接口，而不是依赖这个低效率的默认实现。
-        let name = self.get_entry_name(ino)?;
-        let entry = self.find(&name)?;
-        return Ok((name, entry.metadata()?));
-    }
-
-    fn ioctl(&self, _cmd: u32, _data: usize) -> Result<usize, SystemError> {
-        // 若文件系统没有实现此方法，则返回“不支持”
-        return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
-    }
-
-    fn mount(
-        &self,
-        _fs: Arc<dyn FileSystem>,
-    ) -> Result<Arc<crate::filesystem::vfs::MountFS>, SystemError> {
-        return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
-    }
-
-    fn truncate(&self, _len: usize) -> Result<(), SystemError> {
-        return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);
-    }
-
-    fn sync(&self) -> Result<(), SystemError> {
-        return Ok(());
-    }
-}
-
-impl DeviceINode for LockedUart {
-    fn set_fs(&self, fs: Weak<DevFS>) {
-        self.0.lock().fs = fs;
-    }
-}
-
-impl LockedUart {
-    /// @brief 串口初始化
-    /// @param uart_port 端口号
-    /// @param baud_rate 波特率
-    /// @return 初始化成功，返回0,失败，返回错误信息
-    #[allow(dead_code)]
-    pub fn uart_init(uart_port: &UartPort, baud_rate: u32) -> Result<(), DeviceError> {
-        let message: &'static str = "uart init.";
-        let port = uart_port.to_u16();
-        // 错误的比特率
-        if baud_rate > UART_MAX_BITS_RATE || UART_MAX_BITS_RATE % baud_rate != 0 {
-            return Err(DeviceError::InitializeFailed);
-        }
-
-        unsafe {
-            io_out8(port + 1, 0x00); // Disable all interrupts
-            io_out8(port + 3, 0x80); // Enable DLAB (set baud rate divisor)
-
-            let divisor = UART_MAX_BITS_RATE / baud_rate;
-
-            io_out8(port + 0, (divisor & 0xff) as u8); // Set divisor  (lo byte)
-            io_out8(port + 1, ((divisor >> 8) & 0xff) as u8); //                  (hi byte)
-            io_out8(port + 3, 0x03); // 8 bits, no parity, one stop bit
-            io_out8(port + 2, 0xC7); // Enable FIFO, clear them, with 14-byte threshold
-            io_out8(port + 4, 0x08); // IRQs enabled, RTS/DSR clear (现代计算机上一般都不需要hardware flow control，因此不需要置位RTS/DSR)
-            io_out8(port + 4, 0x1E); // Set in loopback mode, test the serial chip
-            io_out8(port + 0, 0xAE); // Test serial chip (send byte 0xAE and check if serial returns same byte)
-
-            // Check if serial is faulty (i.e: not same byte as sent)
-            if io_in8(port + 0) != 0xAE {
-                return Err(DeviceError::InitializeFailed);
-            }
-
-            // If serial is not faulty set it in normal operation mode
-            // (not-loopback with IRQs enabled and OUT#1 and OUT#2 bits enabled)
-            io_out8(port + 4, 0x08);
-        }
-        Self::uart_send(uart_port, message);
-        Ok(())
-        /*
-                Notice that the initialization code above writes to [PORT + 1]
-            twice with different values. This is once to write to the Divisor
-            register along with [PORT + 0] and once to write to the Interrupt
-            register as detailed in the previous section.
-                The second write to the Line Control register [PORT + 3]
-            clears the DLAB again as well as setting various other bits.
-        */
-    }
-
-    fn serial_received(offset: u16) -> bool {
-        if unsafe { io_in8(offset + 5) } & 1 != 0 {
-            true
-        } else {
-            false
-        }
-    }
-
-    fn is_transmit_empty(offset: u16) -> bool {
-        if unsafe { io_in8(offset + 5) } & 0x20 != 0 {
-            true
-        } else {
-            false
-        }
-    }
-
-    /// @brief 串口发送
-    /// @param uart_port 端口号
-    /// @param str 发送字符切片
-    /// @return None
-    #[allow(dead_code)]
-    fn uart_send(uart_port: &UartPort, s: &str) {
-        let port = uart_port.to_u16();
-        while Self::is_transmit_empty(port) == false {} //TODO:pause
-        for c in s.bytes() {
-            unsafe {
-                io_out8(port, c);
-            }
-        }
-    }
-
-    /// @brief 串口接收一个字节
-    /// @param uart_port 端口号
-    /// @return 接收的字节
-    #[allow(dead_code)]
-    fn uart_read_byte(uart_port: &UartPort) -> char {
-        let port = uart_port.to_u16();
-        while Self::serial_received(port) == false {} //TODO:pause
-        return unsafe { io_in8(port) as char };
-    }
-
-    #[allow(dead_code)]
-    fn port() -> u16 {
-        UartPort::COM1.to_u16()
-    }
-}
-
-// @brief 串口驱动结构体
-#[repr(C)]
-#[derive(Debug)]
-pub struct UartDriver {
-    id_table: IdTable,
-
-    sys_info: Option<Arc<dyn IndexNode>>,
-}
-
-impl Default for UartDriver {
-    fn default() -> Self {
-        Self {
-            id_table: IdTable::new(
-                "ttyS".to_string(),
-                DeviceNumber::new(DeviceNumber::from_major_minor(4, 64)),
-            ),
-
-            sys_info: None,
-        }
-    }
-}
-
-// @brief 串口驱动结构体(加锁)
-#[derive(Debug)]
-pub struct LockedUartDriver(SpinLock<UartDriver>);
-
-impl Default for LockedUartDriver {
-    fn default() -> Self {
-        Self(SpinLock::new(UartDriver::default()))
-    }
-}
-
-impl KObject for LockedUartDriver {
-    fn as_any_ref(&self) -> &dyn core::any::Any {
-        self
-    }
-
-    fn inode(&self) -> Option<Arc<KernFSInode>> {
-        todo!()
-    }
-
-    fn kobj_type(&self) -> Option<&'static dyn KObjType> {
-        todo!()
-    }
-
-    fn kset(&self) -> Option<Arc<KSet>> {
-        todo!()
-    }
-
-    fn parent(&self) -> Option<Weak<dyn KObject>> {
-        todo!()
-    }
-
-    fn set_inode(&self, _inode: Option<Arc<KernFSInode>>) {
-        todo!()
-    }
-
-    fn kobj_state(&self) -> RwLockReadGuard<KObjectState> {
-        todo!()
-    }
-
-    fn kobj_state_mut(&self) -> RwLockWriteGuard<KObjectState> {
-        todo!()
-    }
-
-    fn set_kobj_state(&self, _state: KObjectState) {
-        todo!()
-    }
-
-    fn name(&self) -> alloc::string::String {
-        todo!()
-    }
-
-    fn set_name(&self, _name: alloc::string::String) {
-        todo!()
-    }
-
-    fn set_kset(&self, _kset: Option<Arc<KSet>>) {
-        todo!()
-    }
-
-    fn set_parent(&self, _parent: Option<Weak<dyn KObject>>) {
-        todo!()
-    }
-}
-
-impl Driver for LockedUartDriver {
-    fn id_table(&self) -> IdTable {
-        return IdTable::new("uart_driver".to_string(), DeviceNumber::new(0));
-    }
-
-    fn probe(&self, data: &DevicePrivateData) -> Result<(), DriverError> {
-        let table = data.compatible_table();
-        if table.matches(&CompatibleTable::new(vec!["uart"])) {
-            return Ok(());
-        }
-        return Err(DriverError::ProbeError);
-    }
-
-    fn load(
-        &self,
-        _data: DevicePrivateData,
-        _resource: Option<DeviceResource>,
-    ) -> Result<Arc<dyn Device>, DriverError> {
-        return Err(DriverError::UnsupportedOperation);
-    }
-}
-
-impl LockedUartDriver {
-    /// @brief 创建串口驱动
-    /// @param sys_info: sys文件系统inode
-    /// @return  
-    #[allow(dead_code)]
-    pub fn new(sys_info: Option<Arc<dyn IndexNode>>) -> Self {
-        Self(SpinLock::new(UartDriver::new(sys_info)))
-    }
-}
-
-impl PlatformDriver for LockedUartDriver {
-    fn compatible_table(&self) -> CompatibleTable {
-        return CompatibleTable::new(vec!["uart"]);
-    }
-}
-
-impl UartDriver {
-    /// @brief 创建串口驱动
-    /// @param sys_info: sys文件系统inode
-    /// @return 返回串口驱动
-    #[allow(dead_code)]
-    pub fn new(sys_info: Option<Arc<dyn IndexNode>>) -> Self {
-        Self {
-            id_table: IdTable::new(
-                "ttyS".to_string(),
-                DeviceNumber::new(DeviceNumber::from_major_minor(4, 64)),
-            ),
-            sys_info,
-        }
-    }
-}
-
-///@brief 发送数据
-///@param port 端口号
-///@param c 要发送的数据
-#[no_mangle]
-pub extern "C" fn c_uart_send(port: u16, c: u8) {
-    while LockedUart::is_transmit_empty(port) == false {} //TODO:pause
-    unsafe {
-        io_out8(port, c);
-    }
-}
-
-///@brief 从uart接收数据
-///@param port 端口号
-///@return u8 接收到的数据
-#[no_mangle]
-pub extern "C" fn c_uart_read(port: u16) -> u8 {
-    while LockedUart::serial_received(port) == false {} //TODO:pause
-    unsafe { io_in8(port) }
-}
-
-///@brief 通过串口发送整个字符串
-///@param port 串口端口
-///@param str 字符串S
-#[no_mangle]
-pub extern "C" fn c_uart_send_str(port: u16, s: *const u8) {
-    unsafe {
-        let mut i = 0isize;
-        while *offset(s, i) != '\0' as u8 {
-            c_uart_send(port, *offset(s, i));
-            i = i + 1;
-        }
-    }
-}
-
-/// @brief 串口初始化
-/// @param u16 端口号
-/// @param baud_rate 波特率
-/// @return 初始化成功，返回0,失败，返回错误码
-#[no_mangle]
-pub extern "C" fn c_uart_init(port: u16, baud_rate: u32) -> i32 {
-    let message: &'static str = "uart init\n";
-    // 错误的比特率
-    if baud_rate > UART_MAX_BITS_RATE || UART_MAX_BITS_RATE % baud_rate != 0 {
-        return -E_UART_BITS_RATE_ERROR;
-    }
-
-    unsafe {
-        io_out8(port + 1, 0x00); // Disable all interrupts
-        io_out8(port + 3, 0x80); // Enable DLAB (set baud rate divisor)
-
-        let divisor = UART_MAX_BITS_RATE / baud_rate;
-
-        io_out8(port + 0, (divisor & 0xff) as u8); // Set divisor  (lo byte)
-        io_out8(port + 1, ((divisor >> 8) & 0xff) as u8); //                  CompatibleTable(hi byte)
-        io_out8(port + 3, 0x03); // 8 bits, no parity, one stop bit
-        io_out8(port + 2, 0xC7); // Enable FIFO, clear them, with 14-byte threshold
-        io_out8(port + 4, 0x08); // IRQs enabled, RTS/DSR clear (现代计算机上一般都不需要hardware flow control，因此不需要置位RTS/DSR)
-        io_out8(port + 4, 0x1E); // Set in loopback mode, test the serial chip
-        io_out8(port + 0, 0xAE); // Test serial chip (send byte 0xAE and check if serial returns same byte)
-
-        // Check if serial is faulty (i.e: not same byte as sent)
-        if io_in8(port + 0) != 0xAE {
-            return -E_UART_SERIAL_FAULT;
-        }
-
-        // If serial is not faulty set it in normal operation mode
-        // (not-loopback with IRQs enabled and OUT#1 and OUT#2 bits enabled)
-        io_out8(port + 4, 0x08);
-        let bytes = message.as_bytes();
-        for c in bytes {
-            c_uart_send(port, *c);
-        }
-    }
-    return UART_SUCCESS;
-    /*
-            Notice that the initialization code above writes to [PORT + 1]
-        twice with different values. This is once to write to the Divisor
-        register along with [PORT + 0] and once to write to the Interrupt
-        register as detailed in the previous section.
-            The second write to the Line Control register [PORT + 3]
-        clears the DLAB again as well as setting various other bits.
-    */
-}
-
-/// @brief 串口初始化，注册串口
-/// @param none
-/// @return 初始化成功，返回(),失败，返回错误码
-pub fn uart_init() -> Result<(), SystemError> {
-    // 以后设备管理初始化完善后不应该出现这种代码，应该在 Driver load 一个设备，即返回设备实例之前就完成设备的 init ，不应该用 lazy_init 在设备上
-    let dev = UART_DEV.0.lock();
-    LockedUart::uart_init(&dev.port, dev.baud_rate).map_err(|_| SystemError::ENODEV)?;
-    drop(dev);
-    // let device_inode = bus_device_register("platform:0", &UART_DEV.id_table().name())
-    //     .expect("uart device register error");
-    // UART_DEV.set_sys_info(Some(device_inode));
-    // let driver_inode = bus_driver_register("platform:0", &UART_DRV.id_table().name())
-    //     .expect("uart driver register error");
-    // UART_DRV.set_sys_info(Some(driver_inode));
-    UART_DEV.set_state(DeviceState::Initialized);
-    devfs_register(&UART_DEV.id_table().name(), UART_DEV.clone())?;
-    // DEVICE_MANAGER.add_device(UART_DEV.id_table().clone(), UART_DEV.clone());
-    return Ok(());
-}

kernel/src/driver/uart/uart_driver.rs

@@ -1,129 +0,0 @@
-use alloc::sync::Arc;
-
-use crate::driver::base::char::CharDevOps;
-use crate::driver::base::device::{device_manager, Device, DeviceResource};
-use crate::driver::base::kobject::KObject;
-use crate::driver::base::platform::CompatibleTable;
-use crate::{
-    driver::{
-        base::device::{driver::DriverError, DevicePrivateData, IdTable},
-        Driver,
-    },
-    libs::spinlock::SpinLock,
-};
-
-use super::uart_device::LockedUart;
-
-lazy_static! {
-    pub static ref UART_COMPAT_TABLE: CompatibleTable = CompatibleTable::new(vec!["uart"]);
-}
-
-#[derive(Debug)]
-pub struct InnerUartDriver {
-    id_table: IdTable,
-}
-
-#[derive(Debug)]
-pub struct UartDriver(SpinLock<InnerUartDriver>);
-
-impl Default for UartDriver {
-    fn default() -> Self {
-        Self(SpinLock::new(InnerUartDriver {
-            id_table: IdTable::default(),
-        }))
-    }
-}
-impl KObject for UartDriver {
-    fn as_any_ref(&self) -> &dyn core::any::Any {
-        self
-    }
-
-    fn set_inode(&self, _inode: Option<Arc<crate::filesystem::kernfs::KernFSInode>>) {
-        todo!()
-    }
-
-    fn inode(&self) -> Option<Arc<crate::filesystem::kernfs::KernFSInode>> {
-        todo!()
-    }
-
-    fn parent(&self) -> Option<alloc::sync::Weak<dyn KObject>> {
-        todo!()
-    }
-
-    fn set_parent(&self, _parent: Option<alloc::sync::Weak<dyn KObject>>) {
-        todo!()
-    }
-
-    fn kset(&self) -> Option<Arc<crate::driver::base::kset::KSet>> {
-        todo!()
-    }
-
-    fn set_kset(&self, _kset: Option<Arc<crate::driver::base::kset::KSet>>) {
-        todo!()
-    }
-
-    fn kobj_type(&self) -> Option<&'static dyn crate::driver::base::kobject::KObjType> {
-        todo!()
-    }
-
-    fn name(&self) -> alloc::string::String {
-        todo!()
-    }
-
-    fn set_name(&self, _name: alloc::string::String) {
-        todo!()
-    }
-
-    fn kobj_state(
-        &self,
-    ) -> crate::libs::rwlock::RwLockReadGuard<crate::driver::base::kobject::KObjectState> {
-        todo!()
-    }
-
-    fn kobj_state_mut(
-        &self,
-    ) -> crate::libs::rwlock::RwLockWriteGuard<crate::driver::base::kobject::KObjectState> {
-        todo!()
-    }
-
-    fn set_kobj_state(&self, _state: crate::driver::base::kobject::KObjectState) {
-        todo!()
-    }
-}
-impl Driver for UartDriver {
-    fn probe(&self, data: &DevicePrivateData) -> Result<(), DriverError> {
-        let compatible_table = data.compatible_table();
-        if compatible_table.matches(&UART_COMPAT_TABLE) {
-            return Ok(());
-        }
-
-        return Err(DriverError::ProbeError);
-    }
-
-    fn load(
-        &self,
-        data: DevicePrivateData,
-        _resource: Option<DeviceResource>,
-    ) -> Result<Arc<dyn Device>, DriverError> {
-        if let Some(device) = device_manager().find_device_by_idtable(data.id_table()) {
-            return Ok(device.clone());
-        }
-        let compatible_table = data.compatible_table();
-        if compatible_table.matches(&UART_COMPAT_TABLE) {
-            let device = LockedUart::default();
-            let arc_device = Arc::new(device);
-            device_manager()
-                .add_device(arc_device.clone())
-                .map_err(|_| DriverError::RegisterError)?;
-            CharDevOps::cdev_add(arc_device.clone(), data.id_table().clone(), 1)
-                .map_err(|_| DriverError::RegisterError)?;
-        }
-
-        return Err(DriverError::RegisterError);
-    }
-
-    fn id_table(&self) -> IdTable {
-        let driver = self.0.lock();
-        return driver.id_table.clone();
-    }
-}

kernel/src/driver/video/mod.rs

@@ -8,8 +8,7 @@ use alloc::{boxed::Box, sync::Arc};
 
 use crate::{
     arch::MMArch,
-    driver::uart::uart_device::c_uart_send_str,
-    driver::uart::uart_device::UartPort::COM1,
+    driver::tty::serial::serial8250::send_to_default_serial8250_port,
     include::bindings::bindings::{
         multiboot2_get_Framebuffer_info, multiboot2_iter, multiboot_tag_framebuffer_info_t,
         FRAME_BUFFER_MAPPING_OFFSET, SPECIAL_MEMOEY_MAPPING_VIRT_ADDR_BASE,
@@ -226,7 +225,7 @@ impl VideoRefreshManager {
         .unwrap();
 
         let init_text = "Video driver to map.\n\0";
-        c_uart_send_str(COM1 as u16, init_text.as_ptr());
+        send_to_default_serial8250_port(init_text.as_bytes());
 
         //地址映射
         let paddr = PhysAddr::new(fb_info.framebuffer_addr as usize);
@@ -245,7 +244,7 @@ impl VideoRefreshManager {
         __MAMAGER = Some(result);
 
         let init_text = "Video driver initialized.\n\0";
-        c_uart_send_str(COM1 as u16, init_text.as_ptr());
+        send_to_default_serial8250_port(init_text.as_bytes());
         return Ok(());
     }
 }

kernel/src/filesystem/kernfs/mod.rs

@@ -1,4 +1,4 @@
-use core::{fmt::Debug, intrinsics::unlikely};
+use core::{cmp::min, fmt::Debug, intrinsics::unlikely};
 
 use alloc::{
     string::String,
@@ -64,7 +64,7 @@ impl KernFS {
                 (*ptr).self_ref = Arc::downgrade(&root_inode);
             }
         }
-        root_inode.inner.lock().parent = Arc::downgrade(&root_inode);
+        root_inode.inner.write().parent = Arc::downgrade(&root_inode);
         *root_inode.fs.write() = Arc::downgrade(&fs);
         return fs;
     }
@@ -88,9 +88,11 @@ impl KernFS {
         };
         let root_inode = Arc::new(KernFSInode {
             name: String::from(""),
-            inner: SpinLock::new(InnerKernFSInode {
+            inner: RwLock::new(InnerKernFSInode {
                 parent: Weak::new(),
                 metadata,
+                symlink_target: None,
+                symlink_target_absolute_path: None,
             }),
             self_ref: Weak::new(),
             fs: RwLock::new(Weak::new()),
@@ -106,7 +108,7 @@ impl KernFS {
 
 #[derive(Debug)]
 pub struct KernFSInode {
-    inner: SpinLock<InnerKernFSInode>,
+    inner: RwLock<InnerKernFSInode>,
     /// 指向当前Inode所属的文件系统的弱引用
     fs: RwLock<Weak<KernFS>>,
     /// 指向自身的弱引用
@@ -129,6 +131,9 @@ pub struct InnerKernFSInode {
 
     /// 当前inode的元数据
     metadata: Metadata,
+    /// 符号链接指向的inode（仅当inode_type为SymLink时有效）
+    symlink_target: Option<Weak<KernFSInode>>,
+    symlink_target_absolute_path: Option<String>,
 }
 
 impl IndexNode for KernFSInode {
@@ -151,7 +156,7 @@ impl IndexNode for KernFSInode {
     }
 
     fn metadata(&self) -> Result<Metadata, SystemError> {
-        return Ok(self.inner.lock().metadata.clone());
+        return Ok(self.inner.read().metadata.clone());
     }
 
     fn set_metadata(&self, _metadata: &Metadata) -> Result<(), SystemError> {
@@ -214,7 +219,7 @@ impl IndexNode for KernFSInode {
             ".." => {
                 return Ok(self
                     .inner
-                    .lock()
+                    .read()
                     .parent
                     .upgrade()
                     .ok_or(SystemError::ENOENT)?);
@@ -300,6 +305,25 @@ impl IndexNode for KernFSInode {
         buf: &mut [u8],
         _data: &mut FilePrivateData,
     ) -> Result<usize, SystemError> {
+        if self.inode_type == KernInodeType::SymLink {
+            let inner = self.inner.read();
+            if offset >= inner.symlink_target_absolute_path.as_ref().unwrap().len() {
+                return Ok(0);
+            }
+            let len = min(len, buf.len());
+            let len = min(
+                len,
+                inner.symlink_target_absolute_path.as_ref().unwrap().len() - offset,
+            );
+            buf[0..len].copy_from_slice(
+                &inner
+                    .symlink_target_absolute_path
+                    .as_ref()
+                    .unwrap()
+                    .as_bytes()[offset..offset + len],
+            );
+            return Ok(len);
+        }
         if self.inode_type != KernInodeType::File {
             return Err(SystemError::EISDIR);
         }
@@ -344,6 +368,51 @@ impl IndexNode for KernFSInode {
 }
 
 impl KernFSInode {
+    pub fn new(
+        parent: Option<Arc<KernFSInode>>,
+        name: String,
+        mut metadata: Metadata,
+        inode_type: KernInodeType,
+        private_data: Option<KernInodePrivateData>,
+        callback: Option<&'static dyn KernFSCallback>,
+    ) -> Arc<KernFSInode> {
+        metadata.file_type = inode_type.into();
+        let parent: Weak<KernFSInode> = parent.map(|x| Arc::downgrade(&x)).unwrap_or_default();
+
+        let inode = Arc::new(KernFSInode {
+            name,
+            inner: RwLock::new(InnerKernFSInode {
+                parent: parent.clone(),
+                metadata,
+                symlink_target: None,
+                symlink_target_absolute_path: None,
+            }),
+            self_ref: Weak::new(),
+            fs: RwLock::new(Weak::new()),
+            private_data: SpinLock::new(private_data),
+            callback,
+            children: SpinLock::new(HashMap::new()),
+            inode_type,
+        });
+
+        {
+            let ptr = inode.as_ref() as *const KernFSInode as *mut KernFSInode;
+            unsafe {
+                (*ptr).self_ref = Arc::downgrade(&inode);
+            }
+        }
+        if parent.strong_count() > 0 {
+            let kernfs = parent
+                .upgrade()
+                .unwrap()
+                .fs()
+                .downcast_arc::<KernFS>()
+                .expect("KernFSInode::new: parent is not a KernFS instance");
+            *inode.fs.write() = Arc::downgrade(&kernfs);
+        }
+        return inode;
+    }
+
     /// 在当前inode下增加子目录
     ///
     /// ## 参数
@@ -410,11 +479,15 @@ impl KernFSInode {
         private_data: Option<KernInodePrivateData>,
         callback: Option<&'static dyn KernFSCallback>,
     ) -> Result<Arc<KernFSInode>, SystemError> {
-        let size = if file_type == KernInodeType::File {
-            4096
-        } else {
-            0
-        };
+        let size;
+        match file_type {
+            KernInodeType::Dir | KernInodeType::SymLink => {
+                size = 0;
+            }
+            KernInodeType::File => {
+                size = 4096;
+            }
+        }
 
         let metadata = Metadata {
             size,
@@ -475,47 +548,35 @@ impl KernFSInode {
         }
     }
 
-    pub fn new(
-        parent: Option<Arc<KernFSInode>>,
+    /// add_link - create a symlink in kernfs
+    ///
+    /// ## 参数
+    ///
+    /// - `parent`: directory to create the symlink in
+    /// - `name`: name of the symlink
+    /// - `target`: target node for the symlink to point to
+    ///
+    /// Returns the created node on success
+    ///
+    /// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/fs/kernfs/symlink.c#25
+    pub fn add_link(
+        &self,
         name: String,
-        mut metadata: Metadata,
-        inode_type: KernInodeType,
-        private_data: Option<KernInodePrivateData>,
-        callback: Option<&'static dyn KernFSCallback>,
-    ) -> Arc<KernFSInode> {
-        metadata.file_type = inode_type.into();
-        let parent: Weak<KernFSInode> = parent.map(|x| Arc::downgrade(&x)).unwrap_or_default();
-
-        let inode = Arc::new(KernFSInode {
+        target: &Arc<KernFSInode>,
+        target_absolute_path: String,
+    ) -> Result<Arc<KernFSInode>, SystemError> {
+        // kdebug!("kernfs add link: name:{name}, target path={target_absolute_path}");
+        let inode = self.inner_create(
             name,
-            inner: SpinLock::new(InnerKernFSInode {
-                parent: parent.clone(),
-                metadata,
-            }),
-            self_ref: Weak::new(),
-            fs: RwLock::new(Weak::new()),
-            private_data: SpinLock::new(private_data),
-            callback,
-            children: SpinLock::new(HashMap::new()),
-            inode_type,
-        });
+            KernInodeType::SymLink,
+            ModeType::S_IFLNK | ModeType::from_bits_truncate(0o777),
+            None,
+            None,
+        )?;
 
-        {
-            let ptr = inode.as_ref() as *const KernFSInode as *mut KernFSInode;
-            unsafe {
-                (*ptr).self_ref = Arc::downgrade(&inode);
-            }
-        }
-        if parent.strong_count() > 0 {
-            let kernfs = parent
-                .upgrade()
-                .unwrap()
-                .fs()
-                .downcast_arc::<KernFS>()
-                .expect("KernFSInode::new: parent is not a KernFS instance");
-            *inode.fs.write() = Arc::downgrade(&kernfs);
-        }
-        return inode;
+        inode.inner.write().symlink_target = Some(Arc::downgrade(target));
+        inode.inner.write().symlink_target_absolute_path = Some(target_absolute_path);
+        return Ok(inode);
     }
 
     pub fn name(&self) -> &str {
@@ -523,13 +584,18 @@ impl KernFSInode {
     }
 
     pub fn parent(&self) -> Option<Arc<KernFSInode>> {
-        return self.inner.lock().parent.upgrade();
+        return self.inner.read().parent.upgrade();
     }
 
     pub fn private_data_mut(&self) -> SpinLockGuard<Option<KernInodePrivateData>> {
         return self.private_data.lock();
     }
 
+    #[allow(dead_code)]
+    pub fn symlink_target(&self) -> Option<Arc<KernFSInode>> {
+        return self.inner.read().symlink_target.as_ref()?.upgrade();
+    }
+
     /// remove a kernfs_node recursively
     pub fn remove_recursive(&self) {
         let mut children = self.children.lock().drain().collect::<Vec<_>>();
@@ -552,6 +618,7 @@ impl KernFSInode {
 pub enum KernInodeType {
     Dir,
     File,
+    SymLink,
 }
 
 impl Into<FileType> for KernInodeType {
@@ -559,6 +626,7 @@ impl Into<FileType> for KernInodeType {
         match self {
             KernInodeType::Dir => FileType::Dir,
             KernInodeType::File => FileType::File,
+            KernInodeType::SymLink => FileType::SymLink,
         }
     }
 }

kernel/src/filesystem/sysfs/group.rs

@@ -34,7 +34,14 @@ impl SysFS {
     ) -> Result<(), SystemError> {
         for i in 0..groups.len() {
             let group = groups[i];
+            if group.attrs().is_empty() {
+                continue;
+            }
             if let Err(e) = self.do_create_group(kobj, group, update) {
+                kerror!(
+                    "Failed to create group '{}', err={e:?}",
+                    group.name().unwrap_or("")
+                );
                 for j in (0..=i).rev() {
                     self.remove_group(kobj, groups[j]).ok();
                 }
@@ -98,6 +105,16 @@ impl SysFS {
         return Ok(());
     }
 
+    pub fn remove_groups(
+        &self,
+        kobj: &Arc<dyn KObject>,
+        groups: &'static [&'static dyn AttributeGroup],
+    ) {
+        for group in groups.iter() {
+            self.remove_group(kobj, *group).ok();
+        }
+    }
+
     /// 从一个kobject中移除一个group
     ///
     /// This function removes a group of attributes from a kobject.  The attributes
@@ -187,6 +204,10 @@ impl SysFS {
         }
 
         if let Err(e) = e {
+            kerror!(
+                "Failed to create sysfs files for group '{}', err={e:?}",
+                group.name().unwrap_or("")
+            );
             self.group_remove_files(&parent, group);
             return Err(e);
         }

kernel/src/filesystem/sysfs/symlink.rs

@@ -1,6 +1,12 @@
-use alloc::{string::String, sync::Arc};
+use alloc::{
+    borrow::ToOwned,
+    string::{String, ToString},
+    sync::Arc,
+};
 
-use crate::{driver::base::kobject::KObject, syscall::SystemError};
+use crate::{
+    driver::base::kobject::KObject, filesystem::kernfs::KernFSInode, syscall::SystemError,
+};
 
 use super::SysFS;
 
@@ -9,18 +15,19 @@ impl SysFS {
     ///
     /// ## 参数
     ///
-    /// - `kobj`: 要创建符号链接的kobject
-    /// - `target`: 符号链接的目标（在目标目录下创建）
+    /// - `kobj`: object whose directory we're creating the link in. (符号链接所在目录)
+    ///    如果为None，则创建在sysfs的根目录下
+    /// - `target`: object we're pointing to.
     /// - `name`: 符号链接的名称
     ///
     /// 参考：https://opengrok.ringotek.cn/xref/linux-6.1.9/fs/sysfs/symlink.c#89
     pub fn create_link(
         &self,
-        _kobj: &Arc<dyn KObject>,
-        _target: &Arc<dyn KObject>,
-        _name: String,
+        kobj: Option<&Arc<dyn KObject>>,
+        target: &Arc<dyn KObject>,
+        name: String,
     ) -> Result<(), SystemError> {
-        todo!("sysfs create link")
+        return self.do_create_link(kobj, target, name, true);
     }
 
     /// 在sysfs中删除一个符号链接
@@ -32,7 +39,67 @@ impl SysFS {
     ///
     ///
     /// 参考：https://opengrok.ringotek.cn/xref/linux-6.1.9/fs/sysfs/symlink.c#143
-    pub fn remove_link(&self, _kobj: &Arc<dyn KObject>, _name: String) -> Result<(), SystemError> {
+    pub fn remove_link(&self, _kobj: &Arc<dyn KObject>, _name: String) {
         todo!("sysfs remove link")
     }
+
+    fn do_create_link(
+        &self,
+        kobj: Option<&Arc<dyn KObject>>,
+        target: &Arc<dyn KObject>,
+        name: String,
+        warn: bool,
+    ) -> Result<(), SystemError> {
+        let parent = if let Some(kobj) = kobj {
+            kobj.inode()
+        } else {
+            Some(self.root_inode().clone())
+        };
+
+        // 没有parent，返回错误
+        let parent = parent.ok_or(SystemError::EFAULT)?;
+        return self.do_create_link_sd(&parent, target, name, warn);
+    }
+
+    /// 参考 https://opengrok.ringotek.cn/xref/linux-6.1.9/fs/sysfs/symlink.c#20
+    fn do_create_link_sd(
+        &self,
+        inode: &Arc<KernFSInode>,
+        target: &Arc<dyn KObject>,
+        name: String,
+        warn: bool,
+    ) -> Result<(), SystemError> {
+        let target_inode = target.inode().ok_or(SystemError::ENOENT)?;
+
+        let target_abs_path = "/sys".to_string() + &self.kernfs_path(&target_inode).to_owned();
+        // let current_path = self.kernfs_path(inode);
+        // kdebug!("sysfs: create link {} to {}", current_path, target_abs_path);
+
+        let kn = inode.add_link(name.clone(), &target_inode, target_abs_path);
+        if kn.is_ok() {
+            return Ok(());
+        }
+        let err = kn.unwrap_err();
+        if warn && err == SystemError::EEXIST {
+            self.warn_duplicate(inode, &name);
+        }
+        return Err(err);
+    }
+
+    /// sysfs_create_link_sd - create symlink to a given object.
+    ///
+    /// ## 参数
+    ///
+    /// - `inode`: 目录inode，在这个目录下创建符号链接
+    /// - `target`: object we're pointing to.
+    /// - `name`: 符号链接的名称
+    #[allow(dead_code)]
+    pub(super) fn create_link_sd(
+        &self,
+        inode: &Arc<KernFSInode>,
+        target: &Arc<dyn KObject>,
+        name: String,
+    ) -> Result<(), SystemError> {
+        return self.do_create_link_sd(inode, target, name, true);
+    }
 }

kernel/src/filesystem/vfs/mod.rs

@@ -78,6 +78,9 @@ pub const DT_SOCK: u16 = 12;
 pub const DT_WHT: u16 = 14;
 pub const DT_MAX: u16 = 16;
 
+/// vfs容许的最大的符号链接跳转次数
+pub const VFS_MAX_FOLLOW_SYMLINK_TIMES: usize = 8;
+
 impl FileType {
     pub fn get_file_type_num(&self) -> u16 {
         return match self {

kernel/src/filesystem/vfs/syscall.rs

@@ -23,7 +23,7 @@ use super::{
     fcntl::{FcntlCommand, FD_CLOEXEC},
     file::{File, FileMode},
     utils::rsplit_path,
-    Dirent, FileType, IndexNode, MAX_PATHLEN, ROOT_INODE,
+    Dirent, FileType, IndexNode, MAX_PATHLEN, ROOT_INODE, VFS_MAX_FOLLOW_SYMLINK_TIMES,
 };
 
 pub const SEEK_SET: u32 = 0;
@@ -156,7 +156,8 @@ impl Syscall {
             return Err(SystemError::ENAMETOOLONG);
         }
 
-        let inode: Result<Arc<dyn IndexNode>, SystemError> = ROOT_INODE().lookup(path);
+        let inode: Result<Arc<dyn IndexNode>, SystemError> =
+            ROOT_INODE().lookup_follow_symlink(path, VFS_MAX_FOLLOW_SYMLINK_TIMES);
 
         let inode: Arc<dyn IndexNode> = if inode.is_err() {
             let errno = inode.unwrap_err();
@@ -344,13 +345,14 @@ impl Syscall {
                 new_path = String::from("/");
             }
         }
-        let inode = match ROOT_INODE().lookup(&new_path) {
-            Err(e) => {
-                kerror!("Change Directory Failed, Error = {:?}", e);
-                return Err(SystemError::ENOENT);
-            }
-            Ok(i) => i,
-        };
+        let inode =
+            match ROOT_INODE().lookup_follow_symlink(&new_path, VFS_MAX_FOLLOW_SYMLINK_TIMES) {
+                Err(e) => {
+                    kerror!("Change Directory Failed, Error = {:?}", e);
+                    return Err(SystemError::ENOENT);
+                }
+                Ok(i) => i,
+            };
         let metadata = inode.metadata()?;
         if metadata.file_type == FileType::Dir {
             proc.basic_mut().set_cwd(String::from(new_path));
@@ -730,7 +732,8 @@ impl Syscall {
             return Err(SystemError::ENAMETOOLONG);
         }
 
-        let inode: Result<Arc<dyn IndexNode>, SystemError> = ROOT_INODE().lookup(path);
+        let inode: Result<Arc<dyn IndexNode>, SystemError> =
+            ROOT_INODE().lookup_follow_symlink(path, VFS_MAX_FOLLOW_SYMLINK_TIMES);
 
         if inode.is_ok() {
             return Err(SystemError::EEXIST);
@@ -739,7 +742,8 @@ impl Syscall {
         let (filename, parent_path) = rsplit_path(path);
 
         // 查找父目录
-        let parent_inode: Arc<dyn IndexNode> = ROOT_INODE().lookup(parent_path.unwrap_or("/"))?;
+        let parent_inode: Arc<dyn IndexNode> = ROOT_INODE()
+            .lookup_follow_symlink(parent_path.unwrap_or("/"), VFS_MAX_FOLLOW_SYMLINK_TIMES)?;
         // 创建nod
         parent_inode.mknod(filename, mode, dev_t)?;
 

kernel/src/init/c_adapter.rs

@@ -1,6 +1,11 @@
-use super::init_intertrait;
+use super::{init_before_mem_init, init_intertrait};
 
 #[no_mangle]
 unsafe extern "C" fn rs_init_intertrait() {
     init_intertrait();
 }
+
+#[no_mangle]
+unsafe extern "C" fn rs_init_before_mem_init() {
+    init_before_mem_init();
+}

kernel/src/init/mod.rs

@@ -1,5 +1,17 @@
+use crate::{
+    driver::{tty::init::tty_early_init, video::VideoRefreshManager},
+    libs::lib_ui::screen_manager::scm_init,
+};
+
 pub mod c_adapter;
 
 fn init_intertrait() {
     intertrait::init_caster_map();
 }
+
+/// 在内存管理初始化之前，执行的初始化
+fn init_before_mem_init() {
+    tty_early_init().expect("tty early init failed");
+    unsafe { VideoRefreshManager::video_init().ok() };
+    scm_init();
+}

kernel/src/lib.rs

@@ -5,6 +5,7 @@
 #![feature(asm_const)]
 #![feature(const_mut_refs)]
 #![feature(const_trait_impl)]
+#![feature(const_refs_to_cell)]
 #![feature(core_intrinsics)]
 #![feature(c_void_variant)]
 #![feature(drain_filter)]

kernel/src/libs/ida/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "ida"
+version = "0.1.0"
+edition = "2021"
+authors = ["longjin <[email protected]>"]
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

kernel/src/libs/ida/src/lib.rs

@@ -0,0 +1,50 @@
+#![no_std]
+#![feature(core_intrinsics)]
+
+use core::intrinsics::unlikely;
+use core::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
+
+/// id分配器
+///
+/// TODO: 当前只是为了简单实现功能，将来这里应使用类似linux的ida的方式去实现
+#[derive(Debug)]
+pub struct IdAllocator {
+    current_id: AtomicUsize,
+    max_id: usize,
+    dead: AtomicBool,
+}
+
+impl IdAllocator {
+    /// 创建一个新的id分配器
+    pub const fn new(max_id: usize) -> Self {
+        Self {
+            current_id: AtomicUsize::new(0),
+            max_id,
+            dead: AtomicBool::new(false),
+        }
+    }
+
+    /// 分配一个新的id
+    ///
+    /// ## 返回
+    ///
+    /// 如果分配成功，返回Some(id)，否则返回None
+    pub fn alloc(&self) -> Option<usize> {
+        if unlikely(self.dead.load(Ordering::SeqCst)) {
+            return None;
+        }
+
+        let ret = self.current_id.fetch_add(1, Ordering::SeqCst);
+        // 如果id溢出，panic
+        if ret == self.max_id {
+            self.dead.store(true, Ordering::SeqCst);
+            return None;
+        }
+
+        return Some(ret);
+    }
+
+    pub fn free(&self, _id: usize) {
+        // todo: free
+    }
+}

kernel/src/libs/int_like.rs

@@ -44,6 +44,11 @@ macro_rules! int_like {
             pub const fn new(x: $backing_type) -> Self {
                 Self::from(x)
             }
+
+            #[allow(dead_code)]
+            pub const fn data(&self) -> $backing_type {
+                self.0
+            }
         }
     };
 

kernel/src/libs/lib_ui/screen_manager.h

@@ -1,11 +1,5 @@
 #pragma once
 
-/**
- * @brief 初始化屏幕管理模块
- *
- */
-extern void scm_init();
-
 /**
  * @brief 当内存管理单元被初始化之后，重新处理帧缓冲区问题
  *

kernel/src/libs/lib_ui/screen_manager.rs

@@ -8,8 +8,7 @@ use alloc::{boxed::Box, collections::LinkedList, string::String, sync::Arc};
 
 use crate::{
     driver::{
-        uart::uart_device::{c_uart_send_str, UartPort},
-        video::video_refresh_manager,
+        tty::serial::serial8250::send_to_default_serial8250_port, video::video_refresh_manager,
     },
     libs::{rwlock::RwLock, spinlock::SpinLock},
     mm::VirtAddr,
@@ -275,13 +274,12 @@ pub trait ScmUiFramework: Sync + Send + Debug {
 /// ## 调用时机
 ///
 /// 该函数在内核启动的早期进行调用。调用时，内存管理模块尚未初始化。
-#[no_mangle]
-pub extern "C" fn scm_init() {
+pub fn scm_init() {
     SCM_DOUBLE_BUFFER_ENABLED.store(false, Ordering::SeqCst); // 禁用双缓冲
 
     textui_init_no_alloc();
 
-    c_uart_send_str(UartPort::COM1.to_u16(), "\nfinish_scm_init\n\0".as_ptr());
+    send_to_default_serial8250_port("\nfinish_scm_init\n\0".as_bytes());
 }
 
 /// 启用某个ui框架，将它的帧缓冲区渲染到屏幕上
@@ -381,10 +379,7 @@ pub fn scm_enable_put_to_window() {
             .enable()
             .unwrap_or_else(|e| e.to_posix_errno());
         if r.is_negative() {
-            c_uart_send_str(
-                UartPort::COM1.to_u16(),
-                "scm_enable_put_to_window() failed.\n\0".as_ptr(),
-            );
+            send_to_default_serial8250_port("scm_enable_put_to_window() failed.\n\0".as_bytes());
         }
     }
 }
@@ -402,10 +397,7 @@ pub fn scm_disable_put_to_window() {
             .disable()
             .unwrap_or_else(|e| e.to_posix_errno());
         if r.is_negative() {
-            c_uart_send_str(
-                UartPort::COM1.to_u16(),
-                "scm_disable_put_to_window() failed.\n\0".as_ptr(),
-            );
+            send_to_default_serial8250_port("scm_disable_put_to_window() failed.\n\0".as_bytes());
         }
     }
 }
@@ -414,7 +406,7 @@ pub fn scm_disable_put_to_window() {
 pub extern "C" fn scm_reinit() -> i32 {
     let r = true_scm_reinit().unwrap_or_else(|e| e.to_posix_errno());
     if r.is_negative() {
-        c_uart_send_str(UartPort::COM1.to_u16(), "scm reinit failed.\n\0".as_ptr());
+        send_to_default_serial8250_port("scm reinit failed.\n\0".as_bytes());
     }
     return r;
 }

kernel/src/libs/lib_ui/textui.rs

@@ -1,7 +1,6 @@
 use crate::{
     driver::{
-        uart::uart_device::{c_uart_send, c_uart_send_str, UartPort},
-        video::video_refresh_manager,
+        tty::serial::serial8250::send_to_default_serial8250_port, video::video_refresh_manager,
     },
     kdebug, kinfo,
     libs::{
@@ -86,10 +85,7 @@ pub unsafe fn textui_framwork_init() {
         scm_register(textui_framework()).expect("register textui framework failed");
         kdebug!("textui framework init success");
 
-        c_uart_send_str(
-            UartPort::COM1.to_u16(),
-            "\ntext ui initialized\n\0".as_ptr(),
-        );
+        send_to_default_serial8250_port("\ntext ui initialized\n\0".as_bytes());
         unsafe { TEXTUI_IS_INIT = true };
     } else {
         panic!("Try to init TEXTUI_FRAMEWORK twice!");
@@ -756,7 +752,7 @@ impl TextuiWindow {
         //进行换行操作
         if character == '\n' {
             // 换行时还需要输出\r
-            c_uart_send(UartPort::COM1.to_u16(), b'\r');
+            send_to_default_serial8250_port(&[b'\r']);
             if is_enable_window == true {
                 self.textui_new_line()?;
             }
@@ -837,7 +833,7 @@ impl TextuiWindow {
         } else {
             // 输出其他字符
 
-            c_uart_send(UartPort::COM1.to_u16(), character as u8);
+            send_to_default_serial8250_port(&[character as u8]);
 
             if is_enable_window == true {
                 if let TextuiVline::Chromatic(vline) =
@@ -902,10 +898,7 @@ impl TextUiFramework {
 impl ScmUiFramework for TextUiFramework {
     // 安装ui框架的回调函数
     fn install(&self) -> Result<i32, SystemError> {
-        c_uart_send_str(
-            UartPort::COM1.to_u16(),
-            "\ntextui_install_handler\n\0".as_ptr(),
-        );
+        send_to_default_serial8250_port("\ntextui_install_handler\n\0".as_bytes());
         return Ok(0);
     }
     // 卸载ui框架的回调函数
@@ -1015,7 +1008,7 @@ pub fn textui_putchar(
 pub extern "C" fn rs_textui_init() -> i32 {
     let r = textui_init().unwrap_or_else(|e| e.to_posix_errno());
     if r.is_negative() {
-        c_uart_send_str(UartPort::COM1.to_u16(), "textui init failed.\n\0".as_ptr());
+        send_to_default_serial8250_port("textui init failed.\n\0".as_bytes());
     }
     return r;
 }

kernel/src/libs/lib_ui/textui_no_alloc.rs

@@ -5,8 +5,7 @@ use core::{
 
 use crate::{
     driver::{
-        uart::uart_device::{c_uart_send, UartPort},
-        video::video_refresh_manager,
+        tty::serial::serial8250::send_to_default_serial8250_port, video::video_refresh_manager,
     },
     syscall::SystemError,
 };
@@ -43,13 +42,12 @@ pub fn no_init_textui_putchar_window(
     if unlikely(character == '\0') {
         return Ok(());
     }
-
-    c_uart_send(UartPort::COM1.to_u16(), character as u8);
+    send_to_default_serial8250_port(&[character as u8]);
 
     // 进行换行操作
     if unlikely(character == '\n') {
         // 换行时还需要输出\r
-        c_uart_send(UartPort::COM1.to_u16(), b'\r');
+        send_to_default_serial8250_port(&[b'\r']);
         if is_put_to_window == true {
             NO_ALLOC_OPERATIONS_LINE.fetch_add(1, Ordering::SeqCst);
             NO_ALLOC_OPERATIONS_INDEX.store(0, Ordering::SeqCst);

kernel/src/libs/wait_queue.rs

@@ -201,16 +201,25 @@ impl WaitQueue {
         let mut to_push_back: Vec<Arc<ProcessControlBlock>> = Vec::new();
         // 如果队列头部的pcb的state与给定的state相与，结果不为0，则唤醒
         while let Some(to_wakeup) = guard.wait_list.pop_front() {
+            let mut wake = false;
             if let Some(state) = state {
                 if to_wakeup.sched_info().state() == state {
-                    ProcessManager::wakeup(&to_wakeup).unwrap_or_else(|e| {
-                        kerror!("wakeup pid: {:?} error: {:?}", to_wakeup.pid(), e);
-                    });
-                    continue;
+                    wake = true;
                 }
+            } else {
+                wake = true;
+            }
+
+            if wake {
+                ProcessManager::wakeup(&to_wakeup).unwrap_or_else(|e| {
+                    kerror!("wakeup pid: {:?} error: {:?}", to_wakeup.pid(), e);
+                });
+                continue;
+            } else {
+                to_push_back.push(to_wakeup);
             }
-            to_push_back.push(to_wakeup);
         }
+
         for to_wakeup in to_push_back {
             guard.wait_list.push_back(to_wakeup);
         }

kernel/src/main.c

@@ -27,18 +27,16 @@
 #include "driver/mouse/ps2_mouse.h"
 #include "driver/multiboot2/multiboot2.h"
 #include <driver/timers/HPET/HPET.h>
-#include <driver/uart/uart.h>
 #include <time/timer.h>
 
 #include <driver/interrupt/apic/apic_timer.h>
 
 extern int rs_driver_init();
- extern int rs_tty_init();
 extern void rs_softirq_init();
 extern void rs_mm_init();
-extern int rs_video_init();
 extern void rs_kthread_init();
 extern void rs_init_intertrait();
+extern void rs_init_before_mem_init();
 
 ul bsp_idt_size, bsp_gdt_size;
 
@@ -72,10 +70,8 @@ void reload_idt()
 // 初始化系统各模块
 void system_initialize()
 {
-    c_uart_init(COM1, 115200);
+    rs_init_before_mem_init();
 
-    rs_video_init();
-    scm_init();
     // 重新加载gdt和idt
     ul tss_item_addr = (ul)phys_2_virt(0x7c00);
 
@@ -131,7 +127,6 @@ void system_initialize()
     vfs_init();
     
     rs_driver_init();
-    rs_tty_init();
 
     rs_kthread_init();
     io_mfence();

user/apps/shell/cmd.c

@@ -14,8 +14,11 @@
 #include <sys/wait.h>
 #include <unistd.h>
 
+#define MAX_PATH_LEN 4096
+
 // 当前工作目录（在main_loop中初始化）
 char *shell_current_path = NULL;
+
 /**
  * @brief shell 内建函数的主命令与处理函数的映射表
  *
@@ -181,16 +184,18 @@ int shell_cmd_cd(int argc, char **argv)
         if (ec == 0)
         {
             // 获取新的路径字符串
-            char *new_path = (char *)malloc(dest_len + 2);
-            memset(new_path, 0, dest_len + 2);
-            strncpy(new_path, argv[1], dest_len);
+            char *new_path = (char *)malloc(MAX_PATH_LEN);
+            if (new_path==NULL) {
+                goto fail;
+            }
+            memset(new_path, 0, MAX_PATH_LEN);
+            getcwd(new_path, MAX_PATH_LEN);
 
             // 释放原有的路径字符串的内存空间
             free(shell_current_path);
 
             shell_current_path = new_path;
 
-            shell_current_path[dest_len] = '\0';
             return 0;
         }
         else
@@ -216,7 +221,7 @@ int shell_cmd_cd(int argc, char **argv)
 
         // 拼接出新的字符串
         char *new_path = (char *)malloc(new_len + 2);
-        memset(new_path, 0, sizeof(new_path));
+        memset(new_path, 0, new_len);
         strncpy(new_path, shell_current_path, current_dir_len);
 
         if (current_dir_len > 1)
@@ -225,10 +230,16 @@ int shell_cmd_cd(int argc, char **argv)
         int x = chdir(new_path);
         if (x == 0) // 成功切换目录
         {
+            free(new_path);
             free(shell_current_path);
-            // printf("new_path=%s, newlen= %d\n", new_path, new_len);
-            new_path[new_len + 1] = '\0';
-            shell_current_path = new_path;
+
+            char * pwd = malloc(MAX_PATH_LEN);
+            if (pwd==NULL) {
+                goto fail;
+            }
+            memset(pwd, 0, MAX_PATH_LEN);
+            getcwd(pwd, MAX_PATH_LEN);
+            shell_current_path = pwd;
             goto done;
         }
         else

user/libs/libc/src/include/export/unistd.h

@@ -131,6 +131,7 @@ pid_t getpid(void);
 int dup(int fd);
 
 int dup2(int ofd, int nfd);
+char *getcwd(char* buf, size_t size);
 
 #if defined(__cplusplus) 
 }  /* extern "C" */ 

user/libs/libc/src/unistd.c

@@ -235,4 +235,9 @@ int dup(int fd)
 int dup2(int ofd, int nfd)
 {
     return syscall_invoke(SYS_DUP2, ofd, nfd, 0, 0, 0, 0, 0, 0);
+}
+
+char *getcwd(char* buf, size_t size)
+{
+    return syscall_invoke(SYS_GETCWD, buf, size, 0, 0, 0, 0, 0, 0);
 }

user/libs/libsystem/syscall.h

@@ -50,6 +50,8 @@
 #define SYS_GETSOCKNAME 41 // 获取socket的名字
 #define SYS_GETPEERNAME 42 // 获取socket的对端名字
 
+#define SYS_GETCWD 48
+
 /**
  * @brief 用户态系统调用函数
  *