mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-21 02:08:12 +03:00
93 lines
3.2 KiB
C++
93 lines
3.2 KiB
C++
/*
|
|
* 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.
|
|
*/
|
|
|
|
//
|
|
// A Disk Device Connected to a PATA Channel
|
|
//
|
|
//
|
|
#pragma once
|
|
|
|
#include <Kernel/Devices/BlockDevice.h>
|
|
#include <Kernel/IRQHandler.h>
|
|
#include <Kernel/Lock.h>
|
|
|
|
namespace Kernel {
|
|
|
|
class PATAChannel;
|
|
|
|
class PATADiskDevice final : public BlockDevice {
|
|
AK_MAKE_ETERNAL
|
|
public:
|
|
// Type of drive this IDEDiskDevice is on the ATA channel.
|
|
//
|
|
// Each PATA channel can contain only two devices, which (I think) are
|
|
// jumper selectable on the drive itself by shorting two pins.
|
|
enum class DriveType : u8 {
|
|
Master,
|
|
Slave
|
|
};
|
|
|
|
public:
|
|
static NonnullRefPtr<PATADiskDevice> create(PATAChannel&, DriveType, int major, int minor);
|
|
virtual ~PATADiskDevice() override;
|
|
|
|
// ^DiskDevice
|
|
virtual bool read_blocks(unsigned index, u16 count, u8*) override;
|
|
virtual bool write_blocks(unsigned index, u16 count, const u8*) override;
|
|
|
|
void set_drive_geometry(u16, u16, u16);
|
|
|
|
// ^BlockDevice
|
|
virtual ssize_t read(FileDescription&, u8*, ssize_t) override;
|
|
virtual bool can_read(const FileDescription&) const override;
|
|
virtual ssize_t write(FileDescription&, const u8*, ssize_t) override;
|
|
virtual bool can_write(const FileDescription&) const override;
|
|
|
|
protected:
|
|
explicit PATADiskDevice(PATAChannel&, DriveType, int, int);
|
|
|
|
private:
|
|
// ^DiskDevice
|
|
virtual const char* class_name() const override;
|
|
|
|
bool wait_for_irq();
|
|
bool read_sectors_with_dma(u32 lba, u16 count, u8*);
|
|
bool write_sectors_with_dma(u32 lba, u16 count, const u8*);
|
|
bool read_sectors(u32 lba, u16 count, u8* buffer);
|
|
bool write_sectors(u32 lba, u16 count, const u8* data);
|
|
bool is_slave() const;
|
|
|
|
Lock m_lock { "IDEDiskDevice" };
|
|
u16 m_cylinders { 0 };
|
|
u16 m_heads { 0 };
|
|
u16 m_sectors_per_track { 0 };
|
|
DriveType m_drive_type { DriveType::Master };
|
|
|
|
PATAChannel& m_channel;
|
|
};
|
|
|
|
}
|