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

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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