mirror of
https://github.com/RGBCube/serenity
synced 2025-05-18 08:35:07 +00:00
40de84ba67
This replaces the current disk detection and disk access code with code based on https://wiki.osdev.org/IDE This allows the system to boot on VirtualBox with serial debugging enabled and VMWare Player. I believe there were several issues with the current code: - It didn't utilise the last 8 bits of the LBA in 24-bit mode. - {read,write}_sectors_with_dma was not setting the obsolete bits, which according to OSdev wiki aren't used but should be set. - The PIO and DMA methods were using slightly different copy and pasted access code, which is now put into a single function called "ata_access" - PIO mode doesn't work. This doesn't fix that and should be looked into in the future. - The detection code was not checking for ATA/ATAPI. - The detection code accidentally had cyls/heads/spt as 8-bit, when they're 16-bit. - The capabilities of the device were not considered. This is now brought in and is currently used to check if the device supports LBA. If not, use CHS.
89 lines
3 KiB
C++
89 lines
3 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/Interrupts/IRQHandler.h>
|
|
#include <Kernel/Lock.h>
|
|
#include <Kernel/Storage/StorageDevice.h>
|
|
|
|
namespace Kernel {
|
|
|
|
class IDEController;
|
|
|
|
class PATADiskDevice final : public StorageDevice {
|
|
friend class IDEController;
|
|
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
|
|
};
|
|
|
|
enum class InterfaceType : u8 {
|
|
ATA,
|
|
ATAPI,
|
|
};
|
|
|
|
public:
|
|
static NonnullRefPtr<PATADiskDevice> create(const IDEController&, IDEChannel&, DriveType, InterfaceType, u16, u16, u16, u16, int major, int minor);
|
|
virtual ~PATADiskDevice() override;
|
|
|
|
// ^StorageDevice
|
|
virtual Type type() const override { return StorageDevice::Type::IDE; }
|
|
virtual size_t max_addressable_block() const override;
|
|
|
|
// ^BlockDevice
|
|
virtual void start_request(AsyncBlockDeviceRequest&) override;
|
|
virtual String device_name() const override;
|
|
|
|
private:
|
|
PATADiskDevice(const IDEController&, IDEChannel&, DriveType, InterfaceType, u16, u16, u16, u16, int major, int minor);
|
|
|
|
// ^DiskDevice
|
|
virtual const char* class_name() const override;
|
|
|
|
bool is_slave() const;
|
|
|
|
Lock m_lock { "IDEDiskDevice" };
|
|
u16 m_cylinders { 0 };
|
|
u16 m_heads { 0 };
|
|
u16 m_sectors_per_track { 0 };
|
|
u16 m_capabilities { 0 };
|
|
IDEChannel& m_channel;
|
|
DriveType m_drive_type { DriveType::Master };
|
|
InterfaceType m_interface_type { InterfaceType::ATA };
|
|
};
|
|
|
|
}
|