1 #![allow(dead_code)] 2 use core::default::Default; 3 4 /// @brief MBR硬盘分区表项的结构 5 #[repr(packed)] 6 #[derive(Debug, Clone, Copy, Default)] 7 pub struct MbrDiskPartitionTableEntry { 8 pub flags: u8, // 引导标志符，标记此分区为活动分区 9 pub starting_head: u8, // 起始磁头号 10 pub starting_sector_cylinder: u16, // sector : 低6, cylinder : 高10; 起始扇区号 + 起始柱面号 11 pub part_type: u8, // 分区类型ID 12 pub ending_head: u8, // 结束磁头号 13 pub ending_sector_cylingder: u16, // ending_sector : 低6, ending_cylinder : 高10; 结束扇区号 + 结束柱面号 14 pub starting_lba: u32, // 起始逻辑扇区 15 pub total_sectors: u32, // 分区占用的磁盘扇区数 16 } 17 18 impl MbrDiskPartitionTableEntry { 19 pub fn starting_sector(&self) -> u16 { 20 return self.starting_sector_cylinder & ((1 << 6) - 1) as u16; 21 } 22 pub fn starting_cylinder(&self) -> u16 { 23 return (self.starting_sector_cylinder >> 6) & ((1 << 10) - 1) as u16; 24 } 25 pub fn ending_sector(&self) -> u16 { 26 return self.ending_sector_cylingder & ((1 << 6) - 1) as u16; 27 } 28 pub fn ending_cylinder(&self) -> u16 { 29 return (self.ending_sector_cylingder >> 6) & ((1 << 10) - 1) as u16; 30 } 31 } 32 33 /// @brief MBR磁盘分区表结构体 34 #[repr(packed)] 35 #[derive(Debug, Clone, Copy)] 36 pub struct MbrDiskPartionTable { 37 pub reserved: [u8; 446], 38 pub dpte: [MbrDiskPartitionTableEntry; 4], // 磁盘分区表项 39 pub bs_trailsig: u16, 40 } 41 42 impl Default for MbrDiskPartionTable { 43 fn default() -> Self { 44 MbrDiskPartionTable { 45 reserved: [0; 446], 46 dpte: [Default::default(); 4], 47 bs_trailsig: Default::default(), 48 } 49 } 50 } 51