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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/RefPtr.h>
#include <AK/Vector.h>
#include <Kernel/Devices/DiskDevice.h>
#include <Kernel/Devices/DiskPartition.h>
#define MBR_SIGNATURE 0xaa55
#define MBR_PROTECTIVE 0xEE
struct MBRPartitionEntry {
u8 status;
u8 chs1[3];
u8 type;
u8 chs2[3];
u32 offset;
u32 length;
} __attribute__((packed));
struct MBRPartitionHeader {
u8 code1[218];
u16 ts_zero;
u8 ts_drive, ts_seconds, ts_minutes, ts_hours;
u8 code2[216];
u32 disk_signature;
u16 disk_signature_zero;
MBRPartitionEntry entry[4];
u16 mbr_signature;
} __attribute__((packed));
class MBRPartitionTable {
AK_MAKE_ETERNAL
public:
MBRPartitionTable(NonnullRefPtr<DiskDevice>);
~MBRPartitionTable();
bool initialize();
bool is_protective_mbr() const;
RefPtr<DiskPartition> partition(unsigned index);
private:
NonnullRefPtr<DiskDevice> m_device;
const MBRPartitionHeader& header() const;
u8 m_cached_header[512];
};
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