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Annotation of nono/vm/nereid.h, revision 1.1.1.1

1.1       root        1: //
                      2: // nono
                      3: // Copyright (C) 2023 nono project
                      4: // Licensed under nono-license.txt
                      5: //
                      6: 
                      7: //
                      8: // Nereid Ethernet/メモリ/USB 複合ボード (のうち Ethernet/バンクメモリ)
                      9: //
                     10: 
                     11: #pragma once
                     12: 
                     13: #include "device.h"
                     14: #include "monitor.h"
                     15: #include <array>
                     16: 
                     17: class BankRAMDevice;
                     18: class NereidBoardDevice;
                     19: class RTL8019ASDevice;
                     20: 
                     21: // Nereid 空間担当
                     22: class NereidDevice : public IODevice
                     23: {
                     24:        using inherited = IODevice;
                     25: 
                     26:  public:
                     27:        NereidDevice();
                     28:        ~NereidDevice() override;
                     29: 
                     30:        bool Create() override;
                     31: 
                     32:        uint64 Read8(uint32 addr) override;
                     33:        uint64 Read16(uint32 addr) override;
                     34:        uint64 Write8(uint32 addr, uint32 data) override;
                     35:        uint64 Write16(uint32 addr, uint32 data) override;
                     36:        uint64 Peek8(uint32 addr) override;
                     37: 
                     38:        // Nereid が1枚でもささっていれば true。
                     39:        bool IsInstalled() const;
                     40: 
                     41:  private:
                     42:        inline uint32 Decoder(uint32 addr) const;
                     43:        DECLARE_MONITOR_CALLBACK(MonitorUpdate);
                     44: 
                     45:        // ボードの有無と配置場所 (有りなら $3 か $b、無しなら -1)
                     46:        std::array<int, 2> loc {};
                     47: 
                     48:        std::array<std::unique_ptr<NereidBoardDevice>, 2> boards {};
                     49: 
                     50:        Monitor monitor { this };
                     51: };
                     52: 
                     53: // Nereid ボード1枚分
                     54: class NereidBoardDevice : public IODevice
                     55: {
                     56:        using inherited = IODevice;
                     57: 
                     58:  public:
                     59:        NereidBoardDevice(int n_);
                     60:        ~NereidBoardDevice() override;
                     61: 
                     62:        bool Create() override;
                     63: 
                     64:        uint64 Read8(uint32 addr) override;
                     65:        uint64 Read16(uint32 addr) override;
                     66:        uint64 Write8(uint32 addr, uint32 data) override;
                     67:        uint64 Write16(uint32 addr, uint32 data) override;
                     68:        uint64 Peek8(uint32 addr) override;
                     69: 
                     70:        // ネットワークが有効なら true を返す
                     71:        bool IsNetEnable() const { return (bool)net; }
                     72:        // バンクメモリの容量 [MB] を返す (負数の場合もあり)
                     73:        int GetBankRAMSize() const { return ramsize_MB; }
                     74: 
                     75:        uint32 GetPage() const;
                     76: 
                     77:  private:
                     78:        inline uint32 Decoder(uint32 addr) const;
                     79: 
                     80:        void SetPage(uint32 data);
                     81: 
                     82:        uint32 GetCtrl() const;
                     83:        void SetCtrl(uint32 data);
                     84: 
                     85:        // 1枚目 or 2枚目
                     86:        uint id {};
                     87: 
                     88:        // バンクメモリ容量 (負数あり)
                     89:        int ramsize_MB {};
                     90: 
                     91:        // デバイス
                     92:        std::unique_ptr<BankRAMDevice> bank /*{}*/;
                     93:        std::unique_ptr<RTL8019ASDevice> net /*{}*/;
                     94: };
                     95: 
                     96: static inline NereidDevice *GetNereidDevice() {
                     97:        return Object::GetObject<NereidDevice>(OBJ_NEREID);
                     98: }

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