60 lines
2 KiB
Text
60 lines
2 KiB
Text
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This directory contains a demo of C++ configuration of gem5. The intention
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is to provide a mechanism to allow pre-generated config.ini files generated
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by Python-based gem5 to be reloaded in library-base versions of gem5
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embedded in other systems using C++ calls for simulation control.
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This directory contain a demo of hosting a C++ configured version of gem5
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onto SystemC's event loop. The hosting is achieved by replacing 'simulate'
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with a SystemC object which implements an event loop using SystemC scheduler
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mechanisms.
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The sc_... files here should probably be hosted in a diferent directory and
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buildable as a library.
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Files:
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main.cc -- demonstration top level
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sc_logger.{cc,hh} -- rehosting of DPRINTF onto SC_REPORT
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sc_module.{cc,hh} -- SystemC simulation loop base class
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sc_gem5_control.{cc,hh} -- Alternative extra wrapping to allow gem5
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Systems to be instantiated as single
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sc_module objects.
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stats.{cc,hh} -- Stats dumping (copied from util/cxx_config)
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Read main.cc for more details of the implementation and sc_... files for
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To build:
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First build gem5 as a library with cxx-config support and (optionally)
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without python. Also build a normal gem5 (cxx-config not needed, Python
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needed):
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> cd ../..
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> scons build/ARM/gem5.opt
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> scons --with-cxx-config --without-python build/ARM/libgem5_opt.so
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> cd util/cxx_config
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Then edit Makefile to set the paths for SystemC and run make
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> make
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Make a config file for the C++-configured gem5 using normal gem5
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> ../../build/ARM/gem5.opt ../../configs/example/se.py -c \
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> ../../tests/test-progs/hello/bin/arm/linux/hello
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The binary 'gem5.opt.cxx' can now be used to load in the generated config
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file from the previous normal gem5 run.
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Try:
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> ./gem5.opt.cxx m5out/config.ini
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This should print:
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> Hello world!
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The .ini file can also be read by the Python .ini file reader example:
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> ../../build/ARM/gem5.opt ../../configs/example/read_ini.py m5out/config.ini
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