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57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
/**
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* @file MBR.h
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* @author fslongjin (longjin@RinGoTek.cn)
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* @brief MBR分区表
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* @version 0.1
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* @date 2022-04-19
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*
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* @copyright Copyright (c) 2022
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*
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*/
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#pragma once
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#include <common/glib.h>
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#define MBR_MAX_AHCI_CTRL_NUM 4 // 系统支持的最大的ahci控制器数量
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#define MBR_MAX_AHCI_PORT_NUM 32 // 系统支持的每个ahci控制器对应的MBR磁盘数量（对应ahci磁盘号）
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/**
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* @brief MBR硬盘分区表项的结构
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*
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*/
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struct MBR_disk_partition_table_entry_t
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{
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uint8_t flags; // 引导标志符，标记此分区为活动分区
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uint8_t starting_head; // 起始磁头号
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uint16_t starting_sector : 6, // 起始扇区号
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starting_cylinder : 10; // 起始柱面号
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uint8_t type; // 分区类型ID
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uint8_t ending_head; // 结束磁头号
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uint16_t ending_sector : 6, // 结束扇区号
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ending_cylinder : 10; // 结束柱面号
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uint32_t starting_LBA; // 起始逻辑扇区
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uint32_t total_sectors; // 分区占用的磁盘扇区数
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} __attribute__((packed));
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/**
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* @brief MBR磁盘分区表结构体
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*
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*/
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struct MBR_disk_partition_table_t
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{
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uint8_t reserved[446];
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struct MBR_disk_partition_table_entry_t DPTE[4]; // 磁盘分区表项
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uint16_t BS_TrailSig;
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} __attribute__((packed));
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extern struct MBR_disk_partition_table_t MBR_partition_tables[MBR_MAX_AHCI_CTRL_NUM][MBR_MAX_AHCI_PORT_NUM]; // 导出全局的MBR磁盘分区表
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/**
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* @brief 读取磁盘的分区表
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*
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* @param ahci_ctrl_num ahci控制器编号
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* @param ahci_port_num ahci端口编号
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*/
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struct MBR_disk_partition_table_t *MBR_read_partition_table(uint8_t ahci_ctrl_num, uint8_t ahci_port_num); |