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Annotation of nono/vm/cmmu.h, revision 1.1

1.1     ! root        1: //
        !             2: // nono
        !             3: // Copyright (C) 2020 nono project
        !             4: // Licensed under nono-license.txt
        !             5: //
        !             6: 
        !             7: // M88200 CMMU の I/O デバイス部分
        !             8: 
        !             9: #pragma once
        !            10: 
        !            11: #include "device.h"
        !            12: #include "m88200.h"
        !            13: 
        !            14: class CMMUDevice
        !            15:        : public IODevice
        !            16: {
        !            17:        using inherited = IODevice;
        !            18: 
        !            19:        // レジスタオフセット
        !            20:        static const uint32 IDR         = 0x000;
        !            21:        static const uint32 SCR         = 0x004;
        !            22:        static const uint32 SSR         = 0x008;
        !            23:        static const uint32 SAR         = 0x00c;
        !            24:        static const uint32 SCTR        = 0x104;
        !            25:        static const uint32 PFSR        = 0x108;
        !            26:        static const uint32 PFAR        = 0x10c;
        !            27: 
        !            28:        static const uint32 SAPR        = 0x200;
        !            29:        static const uint32 UAPR        = 0x204;
        !            30: 
        !            31:        static const uint32 BWP0        = 0x400;
        !            32:        static const uint32 BWP7        = 0x41c;
        !            33:        static const uint32 CDP0        = 0x800;
        !            34:        static const uint32 CDP3        = 0x80c;
        !            35:        static const uint32 CTP0        = 0x840;
        !            36:        static const uint32 CTP3        = 0x84c;
        !            37: 
        !            38:        static const uint32 CSSP        = 0x880;
        !            39: 
        !            40:  public:
        !            41:        CMMUDevice();
        !            42:        ~CMMUDevice() override;
        !            43: 
        !            44:        bool Init() override;
        !            45: 
        !            46:        uint64 Read32(uint32 addr) override;
        !            47:        uint64 Write32(uint32 addr, uint32 data) override;
        !            48:        uint64 Peek8(uint32 addr) override;
        !            49: 
        !            50:  private:
        !            51:        // アドレスデコーダ
        !            52:        static uint32 Decoder(uint32 addr);
        !            53: 
        !            54:        // 指定された ID の CMMU(m88200) を返す。なければ NULL を返す。
        !            55:        m88200 *GetCMMU(uint id) const {
        !            56:                if (id >= countof(cmmus) || cmmus[id] == NULL) {
        !            57:                        return NULL;
        !            58:                }
        !            59:                return cmmus[id];
        !            60:        }
        !            61:        // CMMU へのリンク (最大 4 MPU)
        !            62:        m88200 *cmmus[8] {};
        !            63: 
        !            64:        // Peek8() の下請け
        !            65:        uint32 Peek32(uint32 addr) const;
        !            66: };
        !            67: 
        !            68: extern std::unique_ptr<CMMUDevice> gCMMU;

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