mirror of
https://github.com/RGBCube/serenity
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94ca55cefd
As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header.
90 lines
3.4 KiB
C++
90 lines
3.4 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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//
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// A Disk Device Connected to a PATA Channel
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//
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//
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#pragma once
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#include <Kernel/Devices/DiskDevice.h>
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#include <Kernel/IRQHandler.h>
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#include <Kernel/Lock.h>
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class PATAChannel;
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class PATADiskDevice final : public DiskDevice {
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AK_MAKE_ETERNAL
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public:
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// Type of drive this IDEDiskDevice is on the ATA channel.
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//
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// Each PATA channel can contain only two devices, which (I think) are
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// jumper selectable on the drive itself by shorting two pins.
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enum class DriveType : u8 {
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Master,
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Slave
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};
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public:
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static NonnullRefPtr<PATADiskDevice> create(PATAChannel&, DriveType, int major, int minor);
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virtual ~PATADiskDevice() override;
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// ^DiskDevice
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virtual bool read_block(unsigned index, u8*) const override;
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virtual bool write_block(unsigned index, const u8*) override;
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virtual bool read_blocks(unsigned index, u16 count, u8*) override;
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virtual bool write_blocks(unsigned index, u16 count, const u8*) override;
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void set_drive_geometry(u16, u16, u16);
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// ^BlockDevice
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virtual ssize_t read(FileDescription&, u8*, ssize_t) override { return 0; }
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virtual bool can_read(const FileDescription&) const override { return true; }
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virtual ssize_t write(FileDescription&, const u8*, ssize_t) override { return 0; }
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virtual bool can_write(const FileDescription&) const override { return true; }
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protected:
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explicit PATADiskDevice(PATAChannel&, DriveType, int, int);
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private:
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// ^DiskDevice
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virtual const char* class_name() const override;
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bool wait_for_irq();
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bool read_sectors_with_dma(u32 lba, u16 count, u8*);
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bool write_sectors_with_dma(u32 lba, u16 count, const u8*);
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bool read_sectors(u32 lba, u16 count, u8* buffer);
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bool write_sectors(u32 lba, u16 count, const u8* data);
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bool is_slave() const;
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Lock m_lock { "IDEDiskDevice" };
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u16 m_cylinders { 0 };
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u16 m_heads { 0 };
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u16 m_sectors_per_track { 0 };
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DriveType m_drive_type { DriveType::Master };
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PATAChannel& m_channel;
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};
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