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// Copyright (c) 2021 The Regents of the University of California
// All rights reserved.
//
// 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
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#ifndef __SST_RESPONDER_SUBCOMPONENT_HH__
#define __SST_RESPONDER_SUBCOMPONENT_HH__
#define TRACING_ON 0
#include <string>
#include <vector>
#include <unordered_map>
#include <queue>
#include <sst/core/sst_config.h>
#include <sst/core/component.h>
#include <sst/core/simulation.h>
#include <sst/core/interfaces/stringEvent.h>
#include <sst/core/interfaces/simpleMem.h>
#include <sst/core/eli/elementinfo.h>
#include <sst/core/link.h>
// from gem5
#include <sim/sim_object.hh>
#include <sst/outgoing_request_bridge.hh>
#include <sim/root.hh>
#include <sst/sst_responder_interface.hh>
#include "translator.hh"
#include "sst_responder.hh"
class SSTResponderSubComponent: public SST::SubComponent
{
private:
gem5::OutgoingRequestBridge* responseReceiver;
gem5::SSTResponderInterface* sstResponder;
SST::Interfaces::SimpleMem* memoryInterface;
SST::TimeConverter* timeConverter;
SST::Output* output;
std::queue<gem5::PacketPtr> responseQueue;
std::vector<SST::Interfaces::SimpleMem::Request*> initRequests;
std::string gem5SimObjectName;
std::string memSize;
public:
SSTResponderSubComponent(SST::ComponentId_t id, SST::Params& params);
~SSTResponderSubComponent();
void init(unsigned phase);
void setTimeConverter(SST::TimeConverter* tc);
void setOutputStream(SST::Output* output_);
void setResponseReceiver(gem5::OutgoingRequestBridge* gem5_bridge);
void portEventHandler(SST::Interfaces::SimpleMem::Request* request);
bool blocked();
void setup();
// return true if the SimObject could be found
bool findCorrespondingSimObject(gem5::Root* gem5_root);
bool handleTimingReq(SST::Interfaces::SimpleMem::Request* request);
void handleRecvRespRetry();
void handleRecvFunctional(gem5::PacketPtr pkt);
void handleSwapReqResponse(SST::Interfaces::SimpleMem::Request* request);
TPacketMap sstRequestIdToPacketMap;
public: // register the component to SST
SST_ELI_REGISTER_SUBCOMPONENT_API(SSTResponderSubComponent);
SST_ELI_REGISTER_SUBCOMPONENT_DERIVED(
SSTResponderSubComponent,
"gem5", // SST will look for libgem5.so
"gem5Bridge",
SST_ELI_ELEMENT_VERSION(1, 0, 0),
"Initialize gem5 and link SST's ports to gem5's ports",
SSTResponderSubComponent
)
SST_ELI_DOCUMENT_SUBCOMPONENT_SLOTS(
{"memory", "Interface to the memory subsystem", \
"SST::Interfaces::SimpleMem"}
)
SST_ELI_DOCUMENT_PORTS(
{"port", "Handling mem events", {"memHierarchy.MemEvent", ""}}
)
SST_ELI_DOCUMENT_PARAMS(
{"response_receiver_name", \
"Name of the SimObject receiving the responses"}
)
};
#endif // __SST_RESPONDER_SUBCOMPONENT_HH__