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Annotation of nono/vm/xiospace.h, revision 1.1.1.7

1.1       root        1: //
                      2: // nono
1.1.1.3   root        3: // Copyright (C) 2020 nono project
                      4: // Licensed under nono-license.txt
1.1       root        5: //
                      6: 
                      7: #pragma once
                      8: 
                      9: #include "device.h"
1.1.1.4   root       10: #include <array>
1.1       root       11: 
                     12: class XIOSpaceDevice
                     13:        : public IODevice
                     14: {
1.1.1.3   root       15:        using inherited = IODevice;
1.1       root       16:  public:
                     17:        XIOSpaceDevice();
1.1.1.5   root       18:        virtual ~XIOSpaceDevice() override;
1.1       root       19: 
1.1.1.4   root       20:        bool Init() override;
                     21: 
1.1.1.3   root       22:        uint64 Read8(uint32 addr) override;
                     23:        uint64 Read16(uint32 addr) override;
                     24:        uint64 Read32(uint32 addr) override;
                     25:        uint64 Write8(uint32 addr, uint32 data) override;
                     26:        uint64 Write16(uint32 addr, uint32 data) override;
                     27:        uint64 Write32(uint32 addr, uint32 data) override;
                     28:        uint64 Peek8(uint32 addr) override;
1.1       root       29: 
1.1.1.7 ! root       30:        // ブートページを切り替える。
        !            31:        void SwitchBootPage(bool isrom);
        !            32: 
1.1       root       33:  private:
                     34:        // アドレス addr に対応する IODevice* を返す。
                     35:        // addr は 24bit マスクされていること。
1.1.1.2   root       36:        inline IODevice *SearchDevice(uint32 addr) const
1.1       root       37:        {
                     38:                uint idx = addr / 8192;
                     39:                __assume(idx < 2048);
                     40:                return table[idx];
                     41:        }
                     42: 
                     43:        void AddDevice(IODevice *dev);
                     44: 
1.1.1.4   root       45:        std::array<IODevice*, 2048> table {};
1.1       root       46: };
1.1.1.6   root       47: 
                     48: extern std::unique_ptr<XIOSpaceDevice> gXIOSpace;

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