port.hh

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 * Copyright 2018 Google, Inc.
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#ifndef __SYSTEMC_CORE_PORT_HH__
#define __SYSTEMC_CORE_PORT_HH__
 
#include <list>
#include <typeinfo>
#include <vector>
 
#include "base/cprintf.hh"
#include "systemc/ext/core/sc_interface.hh"
#include "systemc/ext/core/sc_port.hh"
 
namespace sc_gem5
{
 
class StaticSensitivityPort;
class StaticSensitivityFinder;
class Reset;
 
class Port;
 
extern std::list<Port *> allPorts;
 
class Port
{
  private:
    ::sc_core::sc_port_base *portBase;
 
    bool finalized;
    int _maxSize;
    int _size;
 
    bool regPortNeeded;
 
    void finalizePort(StaticSensitivityPort *port);
    void finalizeFinder(StaticSensitivityFinder *finder);
    void finalizeReset(Reset *reset);
 
    void
    addInterface(::sc_core::sc_interface *iface)
    {
        portBase->_gem5AddInterface(iface);
        _size++;
    }
 
    void
    addInterfaces(::sc_core::sc_port_base *pb)
    {
        // Only the ports farthest from the interfaces call register_port.
        pb->_gem5Port->regPortNeeded = false;
        for (int i = 0; i < pb->size(); i++)
            addInterface(pb->_gem5Interface(i));
    }
 
    ::sc_core::sc_interface *
    getInterface(int i)
    {
        return portBase->_gem5Interface(i);
    }
 
    struct Binding
    {
        explicit Binding(::sc_core::sc_interface *interface) :
            interface(interface), port(nullptr)
        {}
 
        explicit Binding(::sc_core::sc_port_base *port) :
            interface(nullptr), port(port)
        {}
 
        ::sc_core::sc_interface *interface;
        ::sc_core::sc_port_base *port;
    };
 
    struct Sensitivity
    {
        Sensitivity(StaticSensitivityPort *port) :
            port(port), finder(nullptr)
        {}
 
        Sensitivity(StaticSensitivityFinder *finder) :
            port(nullptr), finder(finder)
        {}
 
        StaticSensitivityPort *port;
        StaticSensitivityFinder *finder;
    };
 
    std::vector<Binding *> bindings;
    std::vector<Sensitivity *> sensitivities;
    std::vector<Reset *> resets;
 
  public:
    static Port *
    fromPort(const ::sc_core::sc_port_base *pb)
    {
        return pb->_gem5Port;
    }
 
    ::sc_core::sc_port_base *sc_port_base() { return portBase; }
 
    Port(::sc_core::sc_port_base *port_base, int max) :
        portBase(port_base), finalized(false), _maxSize(max), _size(0),
        regPortNeeded(true)
    {
        allPorts.push_front(this);
    }
 
    ~Port() { allPorts.remove(this); }
 
    void
    bind(::sc_core::sc_interface *interface)
    {
        if (bindings.empty())
            addInterface(interface);
        else
            bindings.push_back(new Binding(interface));
    }
 
    void
    bind(::sc_core::sc_port_base *port)
    {
        bindings.push_back(new Binding(port));
    }
 
    void sensitive(StaticSensitivityPort *port);
    void sensitive(StaticSensitivityFinder *finder);
    void addReset(Reset *reset);
 
    void finalize();
    void regPort();
 
    int size() { return _size; }
    int maxSize() { return _maxSize ? _maxSize : _size; }
};
 
} // namespace sc_gem5
 
#endif // __SYSTEMC_CORE_PORT_HH__