lupio_tmr.hh

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/*
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#ifndef __DEV_LUPIO_LUPIO_TMR_HH__
#define __DEV_LUPIO_LUPIO_TMR_HH__
 
#include "arch/riscv/interrupts.hh"
#include "dev/io_device.hh"
#include "dev/platform.hh"
#include "params/LupioTMR.hh"
 
namespace gem5
{
 
class LupioTMR : public BasicPioDevice
{
  private:
    const ByteOrder byteOrder = ByteOrder::little;
    System *system;
    int nThread;
    int intType;
 
    // Register map
    enum
    {
        LUPIO_TMR_TIME = 0x0,
        LUPIO_TMR_LOAD = 0x4,
        LUPIO_TMR_CTRL = 0x8,
        LUPIO_TMR_STAT = 0xC,
 
        // Max offset
        LUPIO_TMR_MAX = 0x10,
    };
 
    struct LupioTimer
    {
        Event *tmrEvent = nullptr;
        uint64_t reload = 0;
        bool ie = false;            // Control
        bool pd = false;
        bool expired = false;       // Status
        Tick startTime = 0;
    };
 
    std::vector<LupioTimer> timers;
 
    uint64_t lupioTMRRead(const uint8_t addr, int size);
    void lupioTMRWrite(const uint8_t addr, uint64_t val64, int size);
 
    uint64_t lupioTMRCurrentTime();
    void lupioTMRSet(int cpu);
    void lupioTMRCallback(int cpu);
 
    void updateIRQ(int level, int cpu);
 
  public:
    PARAMS(LupioTMR);
    LupioTMR(const Params &params);
    ~LupioTMR();
 
    Tick read(PacketPtr pkt) override;
    Tick write(PacketPtr pkt) override;
};
 
} // namespace gem5
 
#endif // __DEV_LUPIO_LUPIO_TMR_HH_