MSXCPUInterface.hh

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#ifndef MSXCPUINTERFACE_HH
#define MSXCPUINTERFACE_HH
 
#include "DebugCondition.hh"
#include "SimpleDebuggable.hh"
#include "InfoTopic.hh"
#include "CacheLine.hh"
#include "MSXDevice.hh"
#include "BreakPoint.hh"
#include "WatchPoint.hh"
#include "ProfileCounters.hh"
#include "openmsx.hh"
#include "ranges.hh"
#include <array>
#include <bitset>
#include <concepts>
#include <vector>
#include <memory>
 
namespace openmsx {
 
class VDPIODelay;
class DummyDevice;
class MSXMotherBoard;
class MSXCPU;
class CliComm;
class BreakPoint;
 
inline constexpr bool PROFILE_CACHELINES = false;
enum CacheLineCounters {
        NonCachedRead,
        NonCachedWrite,
        GetReadCacheLine,
        GetWriteCacheLine,
        SlowRead,
        SlowWrite,
        DisallowCacheRead,
        DisallowCacheWrite,
        InvalidateAllSlots,
        InvalidateReadWrite,
        InvalidateRead,
        InvalidateWrite,
        FillReadWrite,
        FillRead,
        FillWrite,
        NUM // must be last
};
std::ostream& operator<<(std::ostream& os, EnumTypeName<CacheLineCounters>);
std::ostream& operator<<(std::ostream& os, EnumValueName<CacheLineCounters> evn);
 
class MSXCPUInterface : public ProfileCounters<PROFILE_CACHELINES, CacheLineCounters>
{
public:
        MSXCPUInterface(const MSXCPUInterface&) = delete;
        MSXCPUInterface& operator=(const MSXCPUInterface&) = delete;
 
        explicit MSXCPUInterface(MSXMotherBoard& motherBoard);
        ~MSXCPUInterface();
 
        void register_IO_In(byte port, MSXDevice* device);
        void unregister_IO_In(byte port, MSXDevice* device);
 
        void register_IO_Out(byte port, MSXDevice* device);
        void unregister_IO_Out(byte port, MSXDevice* device);
 
        bool replace_IO_In (byte port, MSXDevice* oldDevice, MSXDevice* newDevice);
        bool replace_IO_Out(byte port, MSXDevice* oldDevice, MSXDevice* newDevice);
 
        void registerMemDevice(MSXDevice& device,
                               int ps, int ss, unsigned base, unsigned size);
        void unregisterMemDevice(MSXDevice& device,
                                 int ps, int ss, unsigned base, unsigned size);
 
        void   registerGlobalWrite(MSXDevice& device, word address);
        void unregisterGlobalWrite(MSXDevice& device, word address);
 
        void   registerGlobalRead(MSXDevice& device, word address);
        void unregisterGlobalRead(MSXDevice& device, word address);
 
        void reset();
 
        inline byte readMem(word address, EmuTime::param time) {
                tick(CacheLineCounters::SlowRead);
                if (disallowReadCache[address >> CacheLine::BITS]) [[unlikely]] {
                        return readMemSlow(address, time);
                }
                return visibleDevices[address >> 14]->readMem(address, time);
        }
 
        inline void writeMem(word address, byte value, EmuTime::param time) {
                tick(CacheLineCounters::SlowWrite);
                if (disallowWriteCache[address >> CacheLine::BITS]) [[unlikely]] {
                        writeMemSlow(address, value, time);
                        return;
                }
                visibleDevices[address>>14]->writeMem(address, value, time);
        }
 
        inline byte readIO(word port, EmuTime::param time) {
                return IO_In[port & 0xFF]->readIO(port, time);
        }
 
        inline void writeIO(word port, byte value, EmuTime::param time) {
                IO_Out[port & 0xFF]->writeIO(port, value, time);
        }
 
        [[nodiscard]] inline const byte* getReadCacheLine(word start) const {
                tick(CacheLineCounters::GetReadCacheLine);
                if (disallowReadCache[start >> CacheLine::BITS]) [[unlikely]] {
                        return nullptr;
                }
                return visibleDevices[start >> 14]->getReadCacheLine(start);
        }
 
        [[nodiscard]] inline byte* getWriteCacheLine(word start) const {
                tick(CacheLineCounters::GetWriteCacheLine);
                if (disallowWriteCache[start >> CacheLine::BITS]) [[unlikely]] {
                        return nullptr;
                }
                return visibleDevices[start >> 14]->getWriteCacheLine(start);
        }
 
        [[nodiscard]] byte readIRQVector();
 
        /*
         * Should only be used by PPI
         *  TODO: make private / friend
         */
        void setPrimarySlots(byte value);
 
        void invalidateRWCache(word start, unsigned size, int ps, int ss);
        void invalidateRCache (word start, unsigned size, int ps, int ss);
        void invalidateWCache (word start, unsigned size, int ps, int ss);
 
        void fillRWCache(unsigned start, unsigned size, const byte* rData, byte* wData, int ps, int ss);
        void fillRCache (unsigned start, unsigned size, const byte* rData,              int ps, int ss);
        void fillWCache (unsigned start, unsigned size,                    byte* wData, int ps, int ss);
 
        [[nodiscard]] byte peekMem(word address, EmuTime::param time) const;
        [[nodiscard]] byte peekSlottedMem(unsigned address, EmuTime::param time) const;
        byte readSlottedMem(unsigned address, EmuTime::param time);
        void writeSlottedMem(unsigned address, byte value,
                             EmuTime::param time);
 
        void setExpanded(int ps);
        void unsetExpanded(int ps);
        void testUnsetExpanded(int ps,
                               std::span<const std::unique_ptr<MSXDevice>> allowed) const;
        [[nodiscard]] inline bool isExpanded(int ps) const { return expanded[ps] != 0; }
        void changeExpanded(bool newExpanded);
 
        [[nodiscard]] DummyDevice& getDummyDevice() { return *dummyDevice; }
 
        void insertBreakPoint(BreakPoint bp);
        void removeBreakPoint(const BreakPoint& bp);
        using BreakPoints = std::vector<BreakPoint>;
        [[nodiscard]] static const BreakPoints& getBreakPoints() { return breakPoints; }
 
        void setWatchPoint(const std::shared_ptr<WatchPoint>& watchPoint);
        void removeWatchPoint(std::shared_ptr<WatchPoint> watchPoint);
        // note: must be shared_ptr (not unique_ptr), see WatchIO::doReadCallback()
        using WatchPoints = std::vector<std::shared_ptr<WatchPoint>>;
        [[nodiscard]] const WatchPoints& getWatchPoints() const { return watchPoints; }
 
        void setCondition(DebugCondition cond);
        void removeCondition(const DebugCondition& cond);
        using Conditions = std::vector<DebugCondition>;
        [[nodiscard]] static const Conditions& getConditions() { return conditions; }
 
        [[nodiscard]] static bool isBreaked() { return breaked; }
        void doBreak();
        void doStep();
        void doContinue();
 
        // breakpoint methods used by CPUCore
        [[nodiscard]] static bool anyBreakPoints()
        {
                return !breakPoints.empty() || !conditions.empty();
        }
        [[nodiscard]] bool checkBreakPoints(unsigned pc)
        {
                auto range = ranges::equal_range(breakPoints, pc, {}, &BreakPoint::getAddress);
                if (conditions.empty() && (range.first == range.second)) {
                        return false;
                }
 
                // slow path non-inlined
                checkBreakPoints(range);
                return isBreaked();
        }
 
        // cleanup global variables
        static void cleanup();
 
        // In fast-forward mode, breakpoints, watchpoints and conditions should
        // not trigger.
        void setFastForward(bool fastForward_) { fastForward = fastForward_; }
        [[nodiscard]] bool isFastForward() const { return fastForward; }
 
        [[nodiscard]] MSXDevice* getMSXDevice(int ps, int ss, int page);
 
        template<typename Archive>
        void serialize(Archive& ar, unsigned version);
 
private:
        byte readMemSlow(word address, EmuTime::param time);
        void writeMemSlow(word address, byte value, EmuTime::param time);
 
        MSXDevice*& getDevicePtr(byte port, bool isIn);
 
        void register_IO  (int port, bool isIn,
                           MSXDevice*& devicePtr, MSXDevice* device);
        void unregister_IO(MSXDevice*& devicePtr, MSXDevice* device);
        void testRegisterSlot(MSXDevice& device,
                              int ps, int ss, unsigned base, unsigned size);
        void registerSlot(MSXDevice& device,
                          int ps, int ss, unsigned base, unsigned size);
        void unregisterSlot(MSXDevice& device,
                            int ps, int ss, unsigned base, unsigned size);
 
 
        void checkBreakPoints(std::pair<BreakPoints::const_iterator,
                                        BreakPoints::const_iterator> range);
        void removeBreakPoint(unsigned id);
        void removeCondition(unsigned id);
 
        void removeAllWatchPoints();
        void updateMemWatch(WatchPoint::Type type);
        void executeMemWatch(WatchPoint::Type type, unsigned address,
                             unsigned value = ~0u);
 
        struct MemoryDebug final : SimpleDebuggable {
                explicit MemoryDebug(MSXMotherBoard& motherBoard);
                [[nodiscard]] byte read(unsigned address, EmuTime::param time) override;
                void write(unsigned address, byte value, EmuTime::param time) override;
        } memoryDebug;
 
        struct SlottedMemoryDebug final : SimpleDebuggable {
                explicit SlottedMemoryDebug(MSXMotherBoard& motherBoard);
                [[nodiscard]] byte read(unsigned address, EmuTime::param time) override;
                void write(unsigned address, byte value, EmuTime::param time) override;
        } slottedMemoryDebug;
 
        struct IODebug final : SimpleDebuggable {
                explicit IODebug(MSXMotherBoard& motherBoard);
                [[nodiscard]] byte read(unsigned address, EmuTime::param time) override;
                void write(unsigned address, byte value, EmuTime::param time) override;
        } ioDebug;
 
        struct SlotInfo final : InfoTopic {
                explicit SlotInfo(InfoCommand& machineInfoCommand);
                void execute(std::span<const TclObject> tokens,
                             TclObject& result) const override;
                [[nodiscard]] std::string help(std::span<const TclObject> tokens) const override;
        } slotInfo;
 
        struct SubSlottedInfo final : InfoTopic {
                explicit SubSlottedInfo(InfoCommand& machineInfoCommand);
                void execute(std::span<const TclObject> tokens,
                             TclObject& result) const override;
                [[nodiscard]] std::string help(std::span<const TclObject> tokens) const override;
        } subSlottedInfo;
 
        struct ExternalSlotInfo final : InfoTopic {
                explicit ExternalSlotInfo(InfoCommand& machineInfoCommand);
                void execute(std::span<const TclObject> tokens,
                             TclObject& result) const override;
                [[nodiscard]] std::string help(std::span<const TclObject> tokens) const override;
        } externalSlotInfo;
 
        struct IOInfo : InfoTopic {
                IOInfo(InfoCommand& machineInfoCommand, const char* name);
                void helper(std::span<const TclObject> tokens,
                            TclObject& result, std::span<MSXDevice*, 256> devices) const;
                [[nodiscard]] std::string help(std::span<const TclObject> tokens) const override;
        protected:
                ~IOInfo() = default;
        };
        struct IInfo final : IOInfo {
                explicit IInfo(InfoCommand& machineInfoCommand)
                        : IOInfo(machineInfoCommand, "input_port") {}
                void execute(std::span<const TclObject> tokens,
                             TclObject& result) const override;
        } inputPortInfo;
        struct OInfo final : IOInfo {
                explicit OInfo(InfoCommand& machineInfoCommand)
                        : IOInfo(machineInfoCommand, "output_port") {}
                void execute(std::span<const TclObject> tokens,
                             TclObject& result) const override;
        } outputPortInfo;
 
        void updateVisible(unsigned page);
        inline void updateVisible(unsigned page, int ps, int ss);
        void setSubSlot(byte primSlot, byte value);
 
        std::unique_ptr<DummyDevice> dummyDevice;
        MSXCPU& msxcpu;
        CliComm& cliComm;
        MSXMotherBoard& motherBoard;
 
        std::unique_ptr<VDPIODelay> delayDevice; // can be nullptr
 
        std::array<byte, CacheLine::NUM> disallowReadCache;
        std::array<byte, CacheLine::NUM> disallowWriteCache;
        std::array<std::bitset<CacheLine::SIZE>, CacheLine::NUM> readWatchSet;
        std::array<std::bitset<CacheLine::SIZE>, CacheLine::NUM> writeWatchSet;
 
        struct GlobalRwInfo {
                MSXDevice* device;
                word addr;
                [[nodiscard]] constexpr bool operator==(const GlobalRwInfo&) const = default;
        };
        std::vector<GlobalRwInfo> globalReads;
        std::vector<GlobalRwInfo> globalWrites;
 
        std::array<MSXDevice*, 256> IO_In;
        std::array<MSXDevice*, 256> IO_Out;
        std::array<std::array<std::array<MSXDevice*, 4>, 4>, 4> slotLayout;
        std::array<MSXDevice*, 4> visibleDevices;
        std::array<byte, 4> subSlotRegister;
        std::array<byte, 4> primarySlotState;
        std::array<byte, 4> secondarySlotState;
        byte initialPrimarySlots;
        std::array<unsigned, 4> expanded;
 
        bool fastForward = false; // no need to serialize
 
        //  All CPUs (Z80 and R800) of all MSX machines share this state.
        static inline BreakPoints breakPoints; // sorted on address
        WatchPoints watchPoints; // ordered in creation order,  TODO must also be static
        static inline Conditions conditions; // ordered in creation order
        static inline bool breaked = false;
};
 
 
// Compile-Time Interval (half-open).
//   TODO possibly move this to utils/
template<unsigned BEGIN, unsigned END = BEGIN + 1>
struct CT_Interval
{
        [[nodiscard]] unsigned begin() const { return BEGIN; } // inclusive
        [[nodiscard]] unsigned end()   const { return END; }   // exclusive
};
 
// Execute an 'action' for every element in the given interval(s).
inline void foreach_ct_interval(std::invocable<unsigned> auto action, auto ct_interval)
{
        for (auto i = ct_interval.begin(); i != ct_interval.end(); ++i) {
                action(i);
        }
}
inline void foreach_ct_interval(std::invocable<unsigned> auto action,
                                auto front_interval, auto... tail_intervals)
{
        foreach_ct_interval(action, front_interval);
        foreach_ct_interval(action, tail_intervals...);
}
 
 
template<typename MSXDEVICE, typename... CT_INTERVALS>
struct GlobalRWHelper
{
        void execute(std::invocable<MSXCPUInterface&, MSXDevice&, unsigned> auto action)
        {
                auto& dev = static_cast<MSXDEVICE&>(*this);
                auto& cpu = dev.getCPUInterface();
                foreach_ct_interval(
                        [&](unsigned addr) { action(cpu, dev, addr); },
                        CT_INTERVALS()...);
        }
};
 
template<typename MSXDEVICE, typename... CT_INTERVALS>
struct GlobalWriteClient : GlobalRWHelper<MSXDEVICE, CT_INTERVALS...>
{
        GlobalWriteClient()
        {
                this->execute([](MSXCPUInterface& cpu, MSXDevice& dev, unsigned addr) {
                        cpu.registerGlobalWrite(dev, addr);
                });
        }
 
        ~GlobalWriteClient()
        {
                this->execute([](MSXCPUInterface& cpu, MSXDevice& dev, unsigned addr) {
                        cpu.unregisterGlobalWrite(dev, addr);
                });
        }
};
 
template<typename MSXDEVICE, typename... CT_INTERVALS>
struct GlobalReadClient : GlobalRWHelper<MSXDEVICE, CT_INTERVALS...>
{
        GlobalReadClient()
        {
                this->execute([](MSXCPUInterface& cpu, MSXDevice& dev, unsigned addr) {
                        cpu.registerGlobalRead(dev, addr);
                });
        }
 
        ~GlobalReadClient()
        {
                this->execute([](MSXCPUInterface& cpu, MSXDevice& dev, unsigned addr) {
                        cpu.unregisterGlobalRead(dev, addr);
                });
        }
};
 
} // namespace openmsx
 
#endif