rng.hh

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/*
 * Copyright (c) 2022  Institute of Computing Technology, Chinese Academy
 *                     of Sciences
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#ifndef __DEV_VIRTIO_RNG_HH__
#define __DEV_VIRTIO_RNG_HH__
 
#include "base/compiler.hh"
#include "base/random.hh"
#include "dev/virtio/base.hh"
 
namespace gem5
{
 
struct VirtIORngParams;

class VirtIORng : public VirtIODeviceBase
{
  public:
    typedef VirtIORngParams Params;
    VirtIORng(const Params &params);
    virtual ~VirtIORng();
 
    void readConfig(PacketPtr pkt, Addr cfgOffset);
 
  protected:
    static const DeviceId ID_RNG = 0x04;
 
  protected:
    class RngQueue : public VirtQueue
    {
      public:
        RngQueue(PortProxy &proxy, ByteOrder bo, uint16_t size,
                 VirtIORng &_parent);
        virtual ~RngQueue() {}
 
        void onNotify() { trySend(); }

        void trySend();
 
        std::string name() const { return parent.name() + ".qRecv"; }
 
      protected:
        VirtIORng &parent;
 
        Random::RandomPtr rng = Random::genRandom();
    };

    RngQueue qReq;
};
 
} // namespace gem5
 
#endif // __DEV_VIRTIO_RNG_HH__