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+/*
+ * 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: Matthias Jung
+ * Christian Menard
+ */
+
+#ifndef __SC_SIM_CONTROL_HH__
+#define __SC_SIM_CONTROL_HH__
+
+#include <tlm_utils/simple_target_socket.h>
+
+#include <systemc>
+#include <tlm>
+
+#include "sc_logger.hh"
+#include "sc_module.hh"
+#include "sim/cxx_manager.hh"
+#include "sim/system.hh"
+#include "sim_control_if.hh"
+
+namespace Gem5SystemC
+{
+
+/**
+ * This is the central SystemC module that orchestrates the gem5 simulation.
+ *
+ * The module is responsible for loading the configuration file, setting up and
+ * maintaining the event queues, as well as starting and ending the simulation.
+ * While it is mandatory to have one instance of this class for running a gem5
+ * simulation in SystemC, it is not allowed to have multiple instances!
+ */
+class Gem5SimControl : public Module, public Gem5SimControlInterface
+{
+ protected:
+ CxxConfigManager* config_manager;
+ Gem5SystemC::Logger logger;
+
+ Tick simulationEnd;
+
+ /*
+ * Keep track of the slave and master ports that are created by gem5
+ * according to the config file.
+ */
+ std::map<const std::string, SCSlavePort*> slavePorts;
+ std::map<const std::string, SCMasterPort*> masterPorts;
+
+ /// Pointer to a previously created instance.
+ static Gem5SimControl* instance;
+
+ /** A callback that is called from the run thread before gem5 simulation is
+ * started.
+ *
+ * A derived class may use this to perform any additional initializations
+ * prior simulation.
+ */
+ virtual void beforeSimulate() {}
+
+ /** A callback that is called from the run thread after gem5 simulation
+ * completed.
+ *
+ * A derived class may use this to perform any additional tasks after gem5
+ * exits. For instance, a derived class could use this to call sc_stop().
+ */
+ virtual void afterSimulate() {}
+
+ public:
+ SC_HAS_PROCESS(Gem5SimControl);
+
+ /**
+ * Constructor.
+ *
+ * This class has a public constructor although the class is actually a
+ * singleton. The public constructor is required to ensure compatibility
+ * to external SystemC based tools. For the same reason, the constructor
+ * parameters are basic types (int, string).
+ *
+ * @param configFile location of the gem5 configuration file
+ * @param simulationEnd number of ticks to simulate
+ * @param gem5DebugFlags a space separated list of gem5 debug flags to be
+ * set, a prepended '-' clears the flag
+ */
+ Gem5SimControl(sc_core::sc_module_name name,
+ const std::string& configFile,
+ uint64_t simulationEnd,
+ const std::string& gem5DebugFlags);
+
+ void registerSlavePort(const std::string& name, SCSlavePort* port);
+ void registerMasterPort(const std::string& name, SCMasterPort* port);
+ SCSlavePort* getSlavePort(const std::string& name) override;
+ SCMasterPort* getMasterPort(const std::string& name) override;
+
+ void end_of_elaboration();
+
+ void run();
+};
+
+}
+
+#endif