Rick Rongen
2ac0da6574
added ide block device added mbr block device driver started fat block device driver reordered boot start timer before pci/ide/etc. enable interrupts earlier fixed exception from ide controller cleanup code more printfs
53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
//
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// Created by rick on 07-02-21.
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//
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#include "fat.h"
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#include <types.h>
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typedef struct {
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struct {
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u8 jump[3];
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char oem_identifier[8];
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u16 bytes_per_sector;
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u8 sectors_per_cluster;
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u16 reserved_sectors;
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u8 fats;
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u16 directories;
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u16 total_sectors;
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u8 media_descriptor;
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u16 sectors_per_fat;
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u16 sectors_per_track;
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u16 heads_sides;
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u32 hidden_sectors;
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u32 large_sector_count;
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} bpb;
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union {
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struct {
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u8 drive_number;
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u8 flags;
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u8 signature;
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u32 serial;
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u8 label[11];
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u8 system_id[8];
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} ebr_12_16;
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struct {
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u32 sectors_per_fat;
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u16 flags;
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u16 fat_version;
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u32 root_directory;
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u16 fs_info;
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u16 backup_boot;
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u8 reserved[12];
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u8 drive_number;
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u8 flags_nt;
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u8 signature;
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u32 serial;
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u8 label[11];
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u8 system_id[8];
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} ebr_32;
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};
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} fat_bpb;
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// steal validation code from here https://github.com/torvalds/linux/blob/fcadab740480e0e0e9fa9bd272acd409884d431a/fs/fat/inode.c#L1456
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