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/*
* Copyright 2019 Google LLC.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Chun-Chen TK Hsu
*/
#ifndef __SYSTEMC_SC_PORT_WRAPPER_HH__
#define __SYSTEMC_SC_PORT_WRAPPER_HH__
#include <string>
#include <type_traits>
#include "base/logging.hh"
#include "sim/port.hh"
#include "systemc/ext/core/sc_export.hh"
#include "systemc/ext/core/sc_interface.hh"
#include "systemc/ext/core/sc_port.hh"
namespace sc_gem5
{
// Forward declaration
template <typename IF>
class ScPortWrapper;
template <typename IF>
class ScInterfaceWrapper;
template <typename IF>
class ScExportWrapper;
template <typename IF>
class ScPortWrapper : public ::Port
{
public:
using ScPort = sc_core::sc_port_b<IF>;
ScPortWrapper(ScPort& p, const std::string& name, PortID id)
: Port(name, id), port_(p)
{}
ScPort&
port()
{
return port_;
}
void
unbind() override
{
panic("sc_port can't be unbound.");
}
void
bind(::Port& peer) override
{
// Try ScPortWrapper or ScInterfaceWrapper
if (auto* beer = dynamic_cast<ScPortWrapper<IF>*>(&peer)) {
port_.bind(beer->port());
} else if (auto* iface =
dynamic_cast<ScInterfaceWrapper<IF>*>(&peer)) {
port_.bind(iface->interface());
} else {
fatal("Attempt to bind sc_port %s to incompatible port %s.",
name(), peer.name());
}
}
private:
ScPort& port_;
};
template <typename IF>
class ScInterfaceWrapper : public ::Port
{
public:
ScInterfaceWrapper(IF& i, const std::string name, PortID id)
: Port(name, id), iface_(i)
{}
IF&
interface()
{
return iface_;
}
void
unbind() override
{
panic("sc_interface can't be unbound.");
}
void
bind(::Port& peer) override
{
// fatal error if peer is neither ScPortWrapper nor ScExportWrapper
fatal_if(!dynamic_cast<ScPortWrapper<IF>*>(&peer) &&
!dynamic_cast<ScExportWrapper<IF>*>(&peer),
"Attempt to bind sc_interface %s to incompatible port %s.",
name(), peer.name());
// Don't bind to peer otherwise we may have error messages saying that
// this interface has already be bound since the peer may already did
// that. Just let sc_port or sc_export do the binding
}
private:
IF& iface_;
};
template <typename IF>
class ScExportWrapper : public ::Port
{
public:
using ScExport = sc_core::sc_export<IF>;
ScExportWrapper(ScExport& p, const std::string& name, PortID id)
: Port(name, id), port_(p)
{}
ScExport&
port()
{
return port_;
}
void
unbind() override
{
panic("sc_export cannot be unbound.");
}
void
bind(::Port& peer) override
{
auto* iface = dynamic_cast<ScInterfaceWrapper<IF>*>(&peer);
fatal_if(!iface,
"Attempt to bind sc_export %s to incompatible port %s.",
name(), peer.name());
port_.bind(iface->interface());
}
private:
ScExport& port_;
};
} // namespace sc_gem5
#endif // __SYSTEMC_SC_PORT_WRAPPER_HH__
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