lupio_rng.hh

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#ifndef __DEV_LUPIO_LUPIO_RNG_HH__
#define __DEV_LUPIO_LUPIO_RNG_HH__
 
#include <random>
 
#include "debug/LupioRNG.hh"
#include "dev/io_device.hh"
#include "params/LupioRNG.hh"
#include "sim/system.hh"
 
namespace gem5
{

class LupioRNG : public BasicPioDevice
{
  protected:
    const ByteOrder byteOrder = ByteOrder::little;
 
  // Register map
  private:
    enum
    {
        LUPIO_RNG_RAND,
        LUPIO_RNG_SEED,
        LUPIO_RNG_CTRL,
        LUPIO_RNG_STAT,
    };
 
    std::mt19937 mt;
    uint64_t user_seed;
    bool interrupt_enable = false;

    uint64_t lupioRNGRead(const uint8_t addr);
    void lupioRNGWrite(const uint8_t addr, const uint64_t val64);
 
  public:
    PARAMS(LupioRNG);
    LupioRNG(const Params &params);

    Tick read(PacketPtr pkt) override;
    Tick write(PacketPtr pkt) override;
};
 
} // namespace gem5
 
#endif // __DEV_LUPIO_LUPIO_RNG_HH__