1
0
Fork 0
mirror of https://gitlab.com/sortix/sortix.git synced 2023-02-13 20:55:38 -05:00
sortix--sortix/kernel/ata.h
2014-03-01 14:37:39 +01:00

95 lines
2.2 KiB
C++

/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.
This file is part of Sortix.
Sortix is free software: you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later
version.
Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
details.
You should have received a copy of the GNU General Public License along with
Sortix. If not, see <http://www.gnu.org/licenses/>.
ata.h
Allowes access to block devices over ATA PIO.
*******************************************************************************/
#ifndef SORTIX_ATA_H
#define SORTIX_ATA_H
#include <sortix/kernel/kthread.h>
#include <sortix/kernel/refcount.h>
namespace Sortix {
class Descriptor;
class ATABus;
class ATADrive;
class ATABus
{
public:
ATABus(uint16_t portoffset, uint16_t altport);
~ATABus();
public:
ATADrive* Instatiate(unsigned driveid);
bool SelectDrive(unsigned driveid);
private:
unsigned curdriveid;
uint16_t iobase;
uint16_t altport;
};
class ATADrive
{
public:
off_t GetSectorSize();
off_t GetNumSectors();
off_t GetSize() { return GetSectorSize() * GetNumSectors(); }
bool ReadSector(off_t sector, uint8_t* dest);
bool WriteSector(off_t sector, const uint8_t* src);
size_t Read(off_t byteoffset, uint8_t* dest, size_t numbytes);
size_t Write(off_t byteoffset, const uint8_t* src, size_t numbytes);
public:
ATADrive(ATABus* bus, unsigned driveid, uint16_t portoffset, uint16_t altport);
~ATADrive();
private:
void Initialize();
bool PrepareIO(bool write, off_t sector);
private:
kthread_mutex_t atalock;
unsigned driveid;
uint16_t meta[256];
uint16_t iobase;
uint16_t altport;
ATABus* bus;
bool lba48;
size_t sectorsize;
off_t numsectors;
};
namespace ATA {
void Init(const char* devpath, Ref<Descriptor> slashdev);
ATABus* CreateBus(uint16_t portoffset, uint16_t altport);
} // namespace ATA
} // namespace Sortix
#endif