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Annotation of nono/vm/goldfish_rtc.h, revision 1.1.1.4

1.1       root        1: //
                      2: // nono
                      3: // Copyright (C) 2024 nono project
                      4: // Licensed under nono-license.txt
                      5: //
                      6: 
                      7: //
                      8: // Goldfish (Qemu) RTC+Timer (の RTC のほう)
                      9: //
                     10: 
                     11: #pragma once
                     12: 
                     13: #include "rtc.h"
                     14: 
                     15: class TextScreen;
                     16: 
                     17: // GFRTC/GFTimer 共通
                     18: class GFRTC
                     19: {
                     20:  public:
1.1.1.2   root       21:        static const uint TIME_LOW              = 0x00U >> 2;
                     22:        static const uint TIME_HIGH             = 0x04U >> 2;
                     23:        static const uint ALARM_LOW             = 0x08U >> 2;
                     24:        static const uint ALARM_HIGH    = 0x0cU >> 2;
                     25:        static const uint INTR_STATUS   = 0x10U >> 2;
                     26:        static const uint ALARM_CLEAR   = 0x14U >> 2;
                     27:        static const uint ALARM_STATUS  = 0x18U >> 2;
                     28:        static const uint INTR_CLEAR    = 0x1cU >> 2;
1.1       root       29: };
                     30: 
                     31: class GFRTCDevice : public RTCDevice
                     32: {
                     33:        using inherited = RTCDevice;
                     34: 
                     35:  public:
                     36:        GFRTCDevice();
                     37:        ~GFRTCDevice() override;
                     38: 
                     39:        void ResetHard(bool poweron) override;
                     40: 
                     41:        // モニタの下請け。(GFTimer から呼ばれる)
1.1.1.4 ! root       42:        int MonitorScreenRTC(TextScreen&, int y) const;
1.1       root       43: 
1.1.1.2   root       44:  protected:
                     45:        // BusIO インタフェース
                     46:        static const uint32 NPORT = 0x1000 >> 2;
                     47:        busdata ReadPort(uint32 offset);
                     48:        busdata WritePort(uint32 offset, uint32 data);
                     49:        busdata PeekPort(uint32 offset);
                     50: 
1.1       root       51:  private:
                     52:        void Tick1Hz() override;
                     53: 
                     54:        time_t MkTime() const;
                     55: 
                     56:        uint GetSec()  const override { return sec; }
                     57:        uint GetMin()  const override { return min; }
                     58:        uint GetHour() const override { return hour; }
                     59:        uint GetWday() const override;
                     60:        uint GetMday() const override { return day; }
                     61:        uint GetMon()  const override { return mon; }
                     62:        uint GetYear() const override { return year; }
                     63:        uint GetLeap() const override { return year % 4; }
                     64: 
                     65:        void SetSec(uint v)  override { sec = v; }
                     66:        void SetMin(uint v)  override { min = v; }
                     67:        void SetHour(uint v) override { hour = v; }
                     68:        void SetWday(uint v) override { }
                     69:        void SetMday(uint v) override { day = v; }
                     70:        void SetMon(uint v)  override { mon = v; }
                     71:        void SetYear(uint v) override { year = v; }
                     72:        void SetLeap(uint v) override { }
                     73: 
                     74:        // 現在時刻
                     75:        uint year;      // 西暦 (ゲタなし)
                     76:        uint mon;       // 月 (1-12)
                     77:        uint day;
                     78:        uint hour;
                     79:        uint min;
                     80:        uint sec;
                     81: 
1.1.1.4 ! root       82:        // TIME レジスタラッチ。Goldfish 仕様により 1[nsec] 単位。
        !            83:        union64 time_nsec {};
1.1       root       84: };

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