mirror of
https://github.com/RGBCube/serenity
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61 lines
1.8 KiB
C++
61 lines
1.8 KiB
C++
#pragma once
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#include <AK/RefPtr.h>
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#include <Kernel/Devices/DiskDevice.h>
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#include <Kernel/IRQHandler.h>
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#include <Kernel/Lock.h>
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#include <Kernel/PCI.h>
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#include <Kernel/PhysicalAddress.h>
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#include <Kernel/VM/PhysicalPage.h>
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struct PhysicalRegionDescriptor {
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PhysicalAddress offset;
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word size { 0 };
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word end_of_table { 0 };
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};
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class IDEDiskDevice final : public IRQHandler
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, public DiskDevice {
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AK_MAKE_ETERNAL
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public:
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static NonnullRefPtr<IDEDiskDevice> create();
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virtual ~IDEDiskDevice() override;
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// ^DiskDevice
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virtual unsigned block_size() const override;
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virtual bool read_block(unsigned index, byte*) const override;
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virtual bool write_block(unsigned index, const byte*) override;
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virtual bool read_blocks(unsigned index, word count, byte*) override;
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virtual bool write_blocks(unsigned index, word count, const byte*) override;
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protected:
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IDEDiskDevice();
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private:
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// ^IRQHandler
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virtual void handle_irq() override;
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// ^DiskDevice
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virtual const char* class_name() const override;
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void initialize();
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bool wait_for_irq();
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bool read_sectors_with_dma(dword lba, word count, byte*);
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bool write_sectors_with_dma(dword lba, word count, const byte*);
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bool read_sectors(dword lba, word count, byte* buffer);
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bool write_sectors(dword lba, word count, const byte* data);
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Lock m_lock { "IDEDiskDevice" };
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word m_cylinders { 0 };
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word m_heads { 0 };
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word m_sectors_per_track { 0 };
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word m_io_base { 0 };
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volatile bool m_interrupted { false };
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volatile byte m_device_error { 0 };
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PCI::Address m_pci_address;
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PhysicalRegionDescriptor m_prdt;
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RefPtr<PhysicalPage> m_dma_buffer_page;
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word m_bus_master_base { 0 };
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Lockable<bool> m_dma_enabled;
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};
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