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//
// A Disk Device Connected to a PATA Channel
//
//
#pragma once
#include <AK/RefPtr.h>
#include <Kernel/Devices/DiskDevice.h>
#include <Kernel/Devices/PATAChannel.h>
#include <Kernel/IRQHandler.h>
#include <Kernel/Lock.h>
#include <Kernel/PCI.h>
#include <Kernel/VM/PhysicalAddress.h>
#include <Kernel/VM/PhysicalPage.h>
class PATADiskDevice final : public DiskDevice {
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);
virtual ~PATADiskDevice() override;
// ^DiskDevice
virtual unsigned block_size() const override;
virtual bool read_block(unsigned index, u8*) const override;
virtual bool write_block(unsigned index, const u8*) override;
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);
protected:
explicit PATADiskDevice(PATAChannel&, DriveType);
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;
};
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