Luna/kernel/src/fs/MBR.h

#pragma once

#include "fs/devices/DeviceRegistry.h"
#include <luna/Types.h>

#define MBR_BOOTABLE 0x80

#define MBR_SIGNATURE_1 0x55
#define MBR_SIGNATURE_2 0xAA

namespace MBR
{
    struct [[gnu::packed]] PartitionHeader
    {
        u8 attributes;
        u8 chs_start[3];
        u8 partition_type;
        u8 chs_end[3];
        u32 start_lba;
        u32 num_sectors;
    };

    struct [[gnu::packed]] DiskHeader
    {
        u8 mbr_code[440];
        u8 disk_id[4];
        u8 reserved[2];
        PartitionHeader partitions[4];
        u8 signature[2];
    };

    static_assert(sizeof(DiskHeader) == 512ul);

    Result<bool> identify(SharedPtr<Device> device);
};