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120 lines
3.7 KiB
C++
120 lines
3.7 KiB
C++
//---------------------------------------------------------------------------
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//
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// X68000 EMULATOR "XM6"
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//
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// Copyright (C) 2001-2006 ＰＩ．(ytanaka@ipc-tokai.or.jp)
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// Copyright (C) 2014-2020 GIMONS
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//
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// XM6i
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// Copyright (C) 2010-2015 isaki@NetBSD.org
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//
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// Imported sava's Anex86/T98Next image and MO format support patch.
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// Comments translated to english by akuker.
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//
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//---------------------------------------------------------------------------
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#pragma once
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#include "shared/scsi.h"
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#include "device_factory.h"
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#include "disk_track.h"
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#include "disk_cache.h"
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#include "interfaces/scsi_block_commands.h"
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#include "storage_device.h"
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#include <string>
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#include <unordered_set>
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#include <unordered_map>
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#include <tuple>
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using namespace std;
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class Disk : public StorageDevice, private ScsiBlockCommands
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{
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enum access_mode { RW6, RW10, RW16, SEEK6, SEEK10 };
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unique_ptr<DiskCache> cache;
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// The supported configurable sector sizes, empty if not configurable
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unordered_set<uint32_t> sector_sizes;
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uint32_t configured_sector_size = 0;
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// Sector size shift count (9=512, 10=1024, 11=2048, 12=4096)
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uint32_t size_shift_count = 0;
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public:
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Disk(PbDeviceType type, int lun) : StorageDevice(type, lun) {}
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~Disk() override;
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bool Init(const unordered_map<string, string>&) override;
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void Dispatch(scsi_command) override;
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bool Eject(bool) override;
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virtual void Write(const vector<int>&, const vector<uint8_t>&, uint64_t);
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virtual int Read(const vector<int>&, vector<uint8_t>& , uint64_t);
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uint32_t GetSectorSizeInBytes() const;
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bool IsSectorSizeConfigurable() const { return !sector_sizes.empty(); }
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bool SetConfiguredSectorSize(const DeviceFactory&, uint32_t);
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void FlushCache() override;
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private:
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// Commands covered by the SCSI specifications (see https://www.t10.org/drafts.htm)
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void StartStopUnit();
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void PreventAllowMediumRemoval();
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void SynchronizeCache();
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void ReadDefectData10() const;
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virtual void Read6() { Read(RW6); }
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void Read10() override { Read(RW10); }
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void Read16() override { Read(RW16); }
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virtual void Write6() { Write(RW6); }
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void Write10() override { Write(RW10); }
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void Write16() override { Write(RW16); }
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void Verify10() { Verify(RW10); }
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void Verify16() { Verify(RW16); }
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void Seek();
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void Seek10();
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void ReadCapacity10() override;
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void ReadCapacity16() override;
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void FormatUnit() override;
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void Seek6();
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void Read(access_mode);
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void Write(access_mode) const;
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void Verify(access_mode);
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void ReadWriteLong10() const;
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void ReadWriteLong16() const;
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void ReadCapacity16_ReadLong16();
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void ValidateBlockAddress(access_mode) const;
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tuple<bool, uint64_t, uint32_t> CheckAndGetStartAndCount(access_mode) const;
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int ModeSense6(const vector<int>&, vector<uint8_t>&) const override;
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int ModeSense10(const vector<int>&, vector<uint8_t>&) const override;
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static inline const unordered_map<uint32_t, uint32_t> shift_counts =
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{ { 512, 9 }, { 1024, 10 }, { 2048, 11 }, { 4096, 12 } };
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protected:
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void SetUpCache(off_t, bool = false);
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void ResizeCache(const string&, bool);
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void SetUpModePages(map<int, vector<byte>>&, int, bool) const override;
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void AddErrorPage(map<int, vector<byte>>&, bool) const;
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virtual void AddFormatPage(map<int, vector<byte>>&, bool) const;
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virtual void AddDrivePage(map<int, vector<byte>>&, bool) const;
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void AddCachePage(map<int, vector<byte>>&, bool) const;
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unordered_set<uint32_t> GetSectorSizes() const;
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void SetSectorSizes(const unordered_set<uint32_t>& sizes) { sector_sizes = sizes; }
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void SetSectorSizeInBytes(uint32_t);
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uint32_t GetSectorSizeShiftCount() const { return size_shift_count; }
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void SetSectorSizeShiftCount(uint32_t count) { size_shift_count = count; }
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uint32_t GetConfiguredSectorSize() const;
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static uint32_t CalculateShiftCount(uint32_t);
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};
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