util/systemc/systemc_within_gem5/systemc_sc_main/config.py

# Copyright 2018 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.

import argparse
import m5
import sys

from m5.objects import SystemC_Kernel, Root

# pylint:disable=unused-variable

# The python version of the systemc kernel acts as an interface to sc_main. The
# c++ version of the kernel object has a lot of important jobs supporting
# systemc objects and needs to exist in simulations using systemc.
kernel = SystemC_Kernel()
root = Root(full_system=True, systemc_kernel=kernel)

parser = argparse.ArgumentParser()
parser.add_argument('--word', action="append", default=[],
        help='Add a word to the list of words to print. Can be repeated.')

args = parser.parse_args()

# Tell gem5 to run the c++ sc_main function. If one isn't defined, gem5 will
# detect that and report an error. If gem5 isn't finding your sc_main, make
# sure its signature matches exactly so your compiler doesn't think it's a
# different function.
#
# The arguements passed to this function will be treated as the argv values
# passed to the c++ sc_main, with the argc value set appropriately.
m5.systemc.sc_main(*args.word);

# Construct the SimObject hierarchy. Anything sc_main built has already been
# constructed.
m5.instantiate(None)

# Run the simulation until something kicks us back to the config file. sc_main
# will be at the point it first called sc_start and may keep executing as the
# simulation runs, or it may be completed if it never called sc_start.
cause = m5.simulate(m5.MaxTick).getCause()

# If sc_main finished, extract what it returned and do something with it.
result = m5.systemc.sc_main_result()
if result.code != 0:
    sys.exit(int(result.code))