a6c0e4623c
This change also gets rid of the SystemC namespace which was deprecated in favor of sc_gem5. A few utility functions which check whether certain callbacks have finished were also implemented. status tracking moved from a global variable in sc_main.cc to a member of the kernel simobject. Change-Id: I50967fae9c576fbe45b1faff587aaa824857a289 Reviewed-on: https://gem5-review.googlesource.com/12033 Reviewed-by: Gabe Black <gabeblack@google.com> Maintainer: Gabe Black <gabeblack@google.com>
139 lines
4.1 KiB
C++
139 lines
4.1 KiB
C++
/*
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* Copyright 2018 Google, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Gabe Black
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*/
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#include "systemc/core/kernel.hh"
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#include "base/logging.hh"
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#include "systemc/core/module.hh"
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#include "systemc/core/scheduler.hh"
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namespace sc_gem5
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{
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Kernel::Kernel(Params *params) :
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SimObject(params), _stopAfterCallbacks(false),
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_startComplete(false), _endComplete(false),
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_status(sc_core::SC_ELABORATION),
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t0Event(this, false, EventBase::Default_Pri - 1) {}
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void
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Kernel::init()
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{
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kernel->status(::sc_core::SC_BEFORE_END_OF_ELABORATION);
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for (auto m: sc_gem5::allModules)
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m->sc_mod()->before_end_of_elaboration();
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if (_stopAfterCallbacks)
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stopWork();
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}
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void
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Kernel::regStats()
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{
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kernel->status(::sc_core::SC_END_OF_ELABORATION);
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for (auto m: sc_gem5::allModules)
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m->sc_mod()->end_of_elaboration();
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if (_stopAfterCallbacks)
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stopWork();
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}
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void
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Kernel::startup()
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{
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kernel->status(::sc_core::SC_START_OF_SIMULATION);
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for (auto m: sc_gem5::allModules)
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m->sc_mod()->start_of_simulation();
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_startComplete = true;
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if (_stopAfterCallbacks)
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stopWork();
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kernel->status(::sc_core::SC_RUNNING);
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schedule(t0Event, curTick());
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// Install ourselves as the scheduler's event manager.
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::sc_gem5::scheduler.setEventQueue(eventQueue());
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// Run update once before the event queue starts.
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::sc_gem5::scheduler.update();
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}
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void
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Kernel::stop()
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{
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if (status() < ::sc_core::SC_RUNNING)
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_stopAfterCallbacks = true;
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else
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stopWork();
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}
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void
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Kernel::stopWork()
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{
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kernel->status(::sc_core::SC_END_OF_SIMULATION);
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for (auto m: sc_gem5::allModules)
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m->sc_mod()->end_of_simulation();
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_endComplete = true;
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kernel->status(::sc_core::SC_STOPPED);
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if (_stopAfterCallbacks)
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fatal("Simulation called sc_stop during elaboration.\n");
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}
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void
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Kernel::t0Handler()
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{
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// Now that the event queue has started, mark all the processes that
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// need to be initialized as ready to run.
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//
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// This event has greater priority than delta notifications and so will
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// happen before them, honoring the ordering for the initialization phase
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// in the spec. The delta phase will happen at normal priority, and then
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// the event which runs the processes which is at a lower priority.
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::sc_gem5::scheduler.prepareForInit();
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status(::sc_core::SC_RUNNING);
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}
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Kernel *kernel;
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} // namespace sc_gem5
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sc_gem5::Kernel *
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SystemC_KernelParams::create()
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{
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panic_if(sc_gem5::kernel,
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"Only one systemc kernel object may be defined.\n");
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sc_gem5::kernel = new sc_gem5::Kernel(this);
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return sc_gem5::kernel;
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}
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