mirror of
https://github.com/RGBCube/serenity
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55 lines
1.8 KiB
C++
55 lines
1.8 KiB
C++
/*
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* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/OwnPtr.h>
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#include <Kernel/Storage/ATA/IDEChannel.h>
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namespace Kernel {
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class AsyncBlockDeviceRequest;
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struct [[gnu::packed]] PhysicalRegionDescriptor {
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u32 offset;
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u16 size { 0 };
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u16 end_of_table { 0 };
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};
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class IDEController;
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class BMIDEChannel final : public IDEChannel {
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friend class IDEController;
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friend class PATADiskDevice;
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public:
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static NonnullRefPtr<BMIDEChannel> create(IDEController const&, IDEChannel::IOAddressGroup, IDEChannel::ChannelType type);
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static NonnullRefPtr<BMIDEChannel> create(IDEController const&, u8 irq, IDEChannel::IOAddressGroup, IDEChannel::ChannelType type);
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virtual ~BMIDEChannel() override {};
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virtual bool is_dma_enabled() const override { return true; };
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private:
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BMIDEChannel(IDEController const&, IDEChannel::IOAddressGroup, IDEChannel::ChannelType type);
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BMIDEChannel(IDEController const&, u8 irq, IDEChannel::IOAddressGroup, IDEChannel::ChannelType type);
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void initialize();
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void complete_current_request(AsyncDeviceRequest::RequestResult);
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//^ IRQHandler
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virtual bool handle_irq(RegisterState const&) override;
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//* IDEChannel
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virtual void send_ata_io_command(LBAMode lba_mode, Direction direction) const override;
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virtual void ata_read_sectors(bool, u16) override;
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virtual void ata_write_sectors(bool, u16) override;
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PhysicalRegionDescriptor& prdt() { return *reinterpret_cast<PhysicalRegionDescriptor*>(m_prdt_region->vaddr().as_ptr()); }
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OwnPtr<Memory::Region> m_prdt_region;
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OwnPtr<Memory::Region> m_dma_buffer_region;
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RefPtr<Memory::PhysicalPage> m_prdt_page;
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RefPtr<Memory::PhysicalPage> m_dma_buffer_page;
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};
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}
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