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50 lines
2.1 KiB
C
50 lines
2.1 KiB
C
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#ifndef PARTITIONS_H_
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#define PARTITIONS_H_
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#include <gccore.h>
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#include "bitops.h"
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#define MBR_SIGNATURE ext2fs_cpu_to_le16(0xAA55)
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#define EBR_SIGNATURE ext2fs_cpu_to_le16(0xAA55)
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#define PARTITION_STATUS_BOOTABLE 0x80 /* Bootable (active) */
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#define PARTITION_TYPE_EMPTY 0x00 /* Empty */
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#define PARTITION_TYPE_DOS33_EXTENDED 0x05 /* DOS 3.3+ extended partition */
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#define PARTITION_TYPE_WIN95_EXTENDED 0x0F /* Windows 95 extended partition */
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#define PARTITION_TYPE_LINUX 0x83 /* EXT2/3/4 */
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/**
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* PRIMARY_PARTITION - Block device partition record
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*/
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typedef struct _PARTITION_RECORD {
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u8 status; /* Partition status; see above */
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u8 chs_start[3]; /* Cylinder-head-sector address to first block of partition */
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u8 type; /* Partition type; see above */
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u8 chs_end[3]; /* Cylinder-head-sector address to last block of partition */
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u32 lba_start; /* Local block address to first sector of partition */
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u32 block_count; /* Number of blocks in partition */
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} __attribute__((__packed__)) PARTITION_RECORD;
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/**
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* MASTER_BOOT_RECORD - Block device master boot record
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*/
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typedef struct _MASTER_BOOT_RECORD {
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u8 code_area[446]; /* Code area; normally empty */
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PARTITION_RECORD partitions[4]; /* 4 primary partitions */
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u16 signature; /* MBR signature; 0xAA55 */
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} __attribute__((__packed__)) MASTER_BOOT_RECORD;
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/**
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* EXTENDED_PARTITION - Block device extended boot record
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*/
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typedef struct _EXTENDED_BOOT_RECORD {
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u8 code_area[446]; /* Code area; normally empty */
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PARTITION_RECORD partition; /* Primary partition */
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PARTITION_RECORD next_ebr; /* Next extended boot record in the chain */
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u8 reserved[32]; /* Normally empty */
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u16 signature; /* EBR signature; 0xAA55 */
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} __attribute__((__packed__)) EXTENDED_BOOT_RECORD;
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#endif
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