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/*
* Copyright 2019 Google, Inc.
*
* 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.
*
* Copyright (c) 2015, University of Kaiserslautern
* Copyright (c) 2016, Dresden University of Technology (TU Dresden)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. 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.
*
* 3. Neither the name of the copyright holder 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 HOLDER
* 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: Gabe Black
* Matthias Jung
* Christian Menard
*/
#ifndef __SYSTEMC_TLM_BRIDGE_GEM5_TO_TLM_HH__
#define __SYSTEMC_TLM_BRIDGE_GEM5_TO_TLM_HH__
#include <string>
#include "mem/port.hh"
#include "params/Gem5ToTlmBridgeBase.hh"
#include "sim/system.hh"
#include "systemc/ext/core/sc_module.hh"
#include "systemc/ext/core/sc_module_name.hh"
#include "systemc/ext/tlm_core/2/generic_payload/gp.hh"
#include "systemc/ext/tlm_utils/simple_initiator_socket.h"
#include "systemc/tlm_bridge/sc_peq.hh"
#include "systemc/tlm_port_wrapper.hh"
namespace sc_gem5
{
class Gem5ToTlmBridgeBase : public sc_core::sc_module
{
protected:
using sc_core::sc_module::sc_module;
};
template <unsigned int BITWIDTH>
class Gem5ToTlmBridge : public Gem5ToTlmBridgeBase
{
private:
class BridgeSlavePort : public SlavePort
{
protected:
Gem5ToTlmBridge<BITWIDTH> &bridge;
AddrRangeList
getAddrRanges() const override
{
return bridge.getAddrRanges();
}
Tick
recvAtomic(PacketPtr pkt) override
{
return bridge.recvAtomic(pkt);
}
Tick
recvAtomicBackdoor(PacketPtr pkt, MemBackdoorPtr &backdoor) override
{
return bridge.recvAtomicBackdoor(pkt, backdoor);
}
void
recvFunctional(PacketPtr pkt) override
{
return bridge.recvFunctional(pkt);
}
bool
recvTimingReq(PacketPtr pkt) override
{
return bridge.recvTimingReq(pkt);
}
bool
tryTiming(PacketPtr pkt) override
{
return bridge.tryTiming(pkt);
}
bool
recvTimingSnoopResp(PacketPtr pkt) override
{
return bridge.recvTimingSnoopResp(pkt);
}
void recvRespRetry() override { bridge.recvRespRetry(); }
public:
BridgeSlavePort(const std::string &name_,
Gem5ToTlmBridge<BITWIDTH> &bridge_) :
SlavePort(name_, nullptr), bridge(bridge_)
{}
};
BridgeSlavePort bsp;
tlm_utils::simple_initiator_socket<
Gem5ToTlmBridge<BITWIDTH>, BITWIDTH> socket;
sc_gem5::TlmInitiatorWrapper<BITWIDTH> wrapper;
System *system;
/**
* A transaction after BEGIN_REQ has been sent but before END_REQ, which
* is blocking the request channel (Exlusion Rule, see IEEE1666)
*/
tlm::tlm_generic_payload *blockingRequest;
/**
* Did another gem5 request arrive while currently blocked?
* This variable is needed when a retry should happen
*/
bool needToSendRequestRetry;
/**
* A response which has been asked to retry by gem5 and so is blocking
* the response channel
*/
tlm::tlm_generic_payload *blockingResponse;
AddrRangeList addrRanges;
protected:
void pec(Gem5SystemC::PayloadEvent<Gem5ToTlmBridge<BITWIDTH>> *pe,
tlm::tlm_generic_payload &trans, const tlm::tlm_phase &phase);
MemBackdoorPtr getBackdoor(tlm::tlm_generic_payload &trans);
AddrRangeMap<MemBackdoorPtr> backdoorMap;
// The gem5 port interface.
Tick recvAtomic(PacketPtr packet);
Tick recvAtomicBackdoor(PacketPtr pkt, MemBackdoorPtr &backdoor);
void recvFunctional(PacketPtr packet);
bool recvTimingReq(PacketPtr packet);
bool tryTiming(PacketPtr packet);
bool recvTimingSnoopResp(PacketPtr packet);
void recvRespRetry();
void recvFunctionalSnoop(PacketPtr packet);
AddrRangeList getAddrRanges() const { return addrRanges; }
// The TLM initiator interface.
tlm::tlm_sync_enum nb_transport_bw(tlm::tlm_generic_payload &trans,
tlm::tlm_phase &phase,
sc_core::sc_time &t);
void invalidate_direct_mem_ptr(
sc_dt::uint64 start_range, sc_dt::uint64 end_range);
public:
::Port &gem5_getPort(const std::string &if_name, int idx=-1) override;
typedef Gem5ToTlmBridgeBaseParams Params;
Gem5ToTlmBridge(Params *p, const sc_core::sc_module_name &mn);
tlm_utils::simple_initiator_socket<Gem5ToTlmBridge<BITWIDTH>, BITWIDTH> &
getSocket()
{
return socket;
}
void before_end_of_elaboration() override;
};
} // namespace sc_gem5
#endif // __SYSTEMC_TLM_BRIDGE_GEM5_TO_TLM_HH__
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