mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 10:52:44 +00:00
1b2ef8582c
Asking a File if we could possibly read or write it will never mutate the asking FileDescription&, so it should be const.
64 lines
2 KiB
C++
64 lines
2 KiB
C++
//
|
|
// A Disk Device Connected to a PATA Channel
|
|
//
|
|
//
|
|
#pragma once
|
|
|
|
#include <Kernel/Devices/DiskDevice.h>
|
|
#include <Kernel/IRQHandler.h>
|
|
#include <Kernel/Lock.h>
|
|
|
|
class PATAChannel;
|
|
|
|
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, int major, int minor);
|
|
virtual ~PATADiskDevice() override;
|
|
|
|
// ^DiskDevice
|
|
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);
|
|
|
|
// ^BlockDevice
|
|
virtual ssize_t read(FileDescription&, u8*, ssize_t) override { return 0; }
|
|
virtual bool can_read(const FileDescription&) const override { return true; }
|
|
virtual ssize_t write(FileDescription&, const u8*, ssize_t) override { return 0; }
|
|
virtual bool can_write(const FileDescription&) const override { return true; }
|
|
|
|
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;
|
|
};
|