9 const CHARDEV_MAJOR_HASH_SIZE: usize = 255;
10 const CHARDEV_MAJOR_MAX: usize = 512;
11 const MINOR_BITS: usize = 20;
12 const MINOR_MASK: usize = 1 << MINOR_BITS - 1;
14 const CHARDEV_MAJOR_DYN_END: usize = 234;
16 const CHARDEV_MAJOR_DYN_EXT_START: usize = 511;
17 const CHARDEV_MAJOR_DYN_EXT_END: usize = 384;
63     minorct: usize,      // 次设备号数量
76     pub fn new(dev_t: DeviceNumber, minorct: usize, name: &'static str) -> Self {  in new()  argument
98     pub fn base_minor(&self) -> usize {  in base_minor()  argument
106     pub fn minorct(&self) -> usize {  in minorct()  argument
119     fn major_to_index(major: usize) -> usize {  in major_to_index()  argument
127     fn find_dynamic_major() -> Result<usize, SystemError> {  in find_dynamic_major()
164         count: usize,  in register_chardev_region()  argument
177         baseminor: usize,  in alloc_chardev_region()  argument
178         count: usize,  in alloc_chardev_region()  argument
191         minorct: usize,  in __register_chardev_region()  argument
214             let mut insert_index: usize = 0;  in __register_chardev_region()
245         minorct: usize,  in __unregister_chardev_region()  argument
270     pub fn cdev_add(cdev: Arc<dyn CharDevice>, dev_t: DeviceNumber, range: usize) {  in cdev_add()  argument
271         if Into::<usize>::into(dev_t) == 0 {  in cdev_add()
282     pub fn cdev_del(dev_t: DeviceNumber, range: usize) {  in cdev_del()  argument