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2017-05-02python: Use PyBind11 instead of SWIG for Python wrappersAndreas Sandberg
Use the PyBind11 wrapping infrastructure instead of SWIG to generate wrappers for functionality that needs to be exported to Python. This has several benefits: * PyBind11 can be redistributed with gem5, which means that we have full control of the version used. This avoid a large number of hard-to-debug SWIG issues we have seen in the past. * PyBind11 doesn't rely on a custom C++ parser, instead it relies on wrappers being explicitly declared in C++. The leads to slightly more boiler-plate code in manually created wrappers, but doesn't doesn't increase the overall code size. A big benefit is that this avoids strange compilation errors when SWIG doesn't understand modern language features. * Unlike SWIG, there is no risk that the wrapper code incorporates incorrect type casts (this has happened on numerous occasions in the past) since these will result in compile-time errors. As a part of this change, the mechanism to define exported methods has been redesigned slightly. New methods can be exported either by declaring them in the SimObject declaration and decorating them with the cxxMethod decorator or by adding an instance of PyBindMethod/PyBindProperty to the cxx_exports class variable. The decorator has the added benefit of making it possible to add a docstring and naming the method's parameters. The new wrappers have the following known issues: * Global events can't be memory managed correctly. This was the case in SWIG as well. Change-Id: I88c5a95b6cf6c32fa9e1ad31dfc08b2e8199a763 Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Andreas Hansson <andreas.hansson@arm.com> Reviewed-by: Andrew Bardsley <andrew.bardsley@arm.com> Reviewed-on: https://gem5-review.googlesource.com/2231 Reviewed-by: Tony Gutierrez <anthony.gutierrez@amd.com> Reviewed-by: Pierre-Yves PĂ©neau <pierre-yves.peneau@lirmm.fr> Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
2017-01-27python: Move native wrappers to the _m5 namespaceAndreas Sandberg
Swig wrappers for native objects currently share the _m5.internal name space with Python code. This is undesirable if we ever want to switch from Swig to some other framework for native binding (e.g., PyBind11 or Boost::Python). This changeset moves all of such wrappers to the _m5 namespace, which is now reserved for native code. Change-Id: I2d2bc12dbc05b57b7c5a75f072e08124413d77f3 Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Curtis Dunham <curtis.dunham@arm.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
2016-03-30misc: Don't build region.py as a PySourceAndreas Sandberg
The style refactor change (style: Refactor the style checker as a Python package) moved region.py from src/python/m5/util/ to util/style/. The SConscript update accidentally got lost in that commit. This commit removes region.py from src/python/SConscript. Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> --HG-- extra : amend_source : f69b75bf636dd4a4232af3e10c29f7eaa4d59dc8
2014-10-16config: Add a --without-python option to build processAndrew Bardsley
Add the ability to build libgem5 without embedded Python or the ability to configure with Python. This is a prelude to a patch to allow config.ini files to be loaded into libgem5 using only C++ which would make embedding gem5 within other simulation systems easier. This adds a few registration interfaces to things which cross between Python and C++. Namely: stats dumping and SimObject resolving
2012-11-02sim: Add SWIG interface for SerializableAndreas Sandberg
This changeset adds a SWIG interface for the Serializable class, which fixes a warning when compiling the SWIG interface for the event queue. Currently, the only method exported is the name() method.
2012-11-02sim: Move the draining interface into a separate base classAndreas Sandberg
This patch moves the draining interface from SimObject to a separate class that can be used by any object needing draining. However, objects not visible to the Python code (i.e., objects not deriving from SimObject) still depend on their parents informing them when to drain. This patch also gets rid of the CountedDrainEvent (which isn't really an event) and replaces it with a DrainManager.
2012-05-10DOT: improved dot-based system visualizationUri Wiener
Revised system visualization to reflect structure and memory hierarchy. Improved visualization: less congested and cluttered; more colorful. Nodes reflect components; directed edges reflect dirctional relation, from a master port to a slave port. Requires pydot.
2011-10-20SimObject: add export_method* hooks to export C++ methods to PythonSteve Reinhardt
Replace the (broken as of previous changeset) swig_objdecl() method that allowed/forced you to substitute a whole new C++ struct definition for SWIG to wrap with a set of export_method* hooks that let you just declare a set of C++ methods (or other declarations) that get inserted in the auto-generated struct. Restore the System get/setMemoryMode methods, and use this mechanism to specialize SimObject as well, eliminating teh need for sim_object.i. Needed bits of sim_object.i are moved to the new pyobject.i. Also sucked a little SimObject specialization into cxx_param_decl() allowing us to get rid of src/sim/sim_object_params.hh. Now the generation and wrapping of the base SimObject param struct is more in line with how derived objects are handled. --HG-- rename : src/python/swig/sim_object.i => src/python/swig/pyobject.i
2011-05-12stats: better expose statistics to python.Nathan Binkert
Build a python list and dict of all stats and expose flags properly. --HG-- rename : src/python/m5/stats.py => src/python/m5/stats/__init__.py
2011-04-15region: add a utility class for keeping track of regions of some rangeNathan Binkert
This is basically like the range_map stuff in src/base (range already exists in Python). This code is like a set of ranges. I'm using it to keep track of changed lines in source code, but it could be use to keep track of memory ranges and holes in memory regions. It could also be used in memory allocation type stuff. (Though it's not at all optimized.)
2011-03-18swig: get rid of m5.internal.random module (swig/random.i)Steve Reinhardt
Thanks to swig this was interfering with the standard Python random module. The only function in that module was seed(), which erroneously called srand48(). Moved the function to m5.internal.core, renamed it seedRandom(), and made it call random_mt.init() instead.
2011-01-07scons: show sources and targets when building, and colorize output.Steve Reinhardt
I like the brevity of Ali's recent change, but the ambiguity of sometimes showing the source and sometimes the target is a little confusing. This patch makes scons typically list all sources and all targets for each action, with the common path prefix factored out for brevity. It's a little more verbose now but also more informative. Somehow Ali talked me into adding colors too, which is a whole 'nother story.
2010-09-22python: get rid of internal.enums package.Steve Reinhardt
Move generated enums into internal.params, which gets imported into object.params, restoring backward compatibility for scripts that expect to find them there.
2010-09-12swig: make all generated files go into the m5.internal packageNathan Binkert
This is necessary because versions of swig older than 1.3.39 fail to do the right thing and try to do relative imports for everything (even with the package= option to %module). Instead of putting params in the m5.internal.params package, put params in the m5.internal package and make all param modules start with param_. Same thing for m5.internal.enums. Also, stop importing all generated params into m5.objects. They are not necessary and now with everything using relative imports we wound up with pollution of the namespace (where builtin-range got overridden). --HG-- rename : src/python/m5/internal/enums/__init__.py => src/python/m5/internal/enums.py rename : src/python/m5/internal/params/__init__.py => src/python/m5/internal/params.py
2010-09-09scons: Stop building the big monolithic swigged params moduleNathan Binkert
kill params.i and create a separate .i for each object (param, enums, etc.)
2010-09-09init: don't build files that centralize python and swig codeNathan Binkert
Instead of putting all object files into m5/object/__init__.py, interrogate the importer to find out what should be imported. Instead of creating a single file that lists all of the embedded python modules, use static object construction to put those objects onto a list. Do something similar for embedded swig (C++) code.
2010-07-21python: add a sorted dictionary classNathan Binkert
It would be nice if python had a tree class that would do this for real, but since we don't, we'll just keep a sorted list of keys and update it on demand.
2009-09-22python: Move more code into m5.util allow SCons to use that code.Nathan Binkert
Get rid of misc.py and just stick misc things in __init__.py Move utility functions out of SCons files and into m5.util Move utility type stuff from m5/__init__.py to m5/util/__init__.py Remove buildEnv from m5 and allow access only from m5.defines Rename AddToPath to addToPath while we're moving it to m5.util Rename read_command to readCommand while we're moving it Rename compare_versions to compareVersions while we're moving it. --HG-- rename : src/python/m5/convert.py => src/python/m5/util/convert.py rename : src/python/m5/smartdict.py => src/python/m5/util/smartdict.py
2009-08-16code_formatter: Add a python class for writing code generator templatesNathan Binkert
2009-08-16ply: add a base class called Grammar that encapsulates a ply grammarNathan Binkert
2009-08-16orderdict: Use DictMixin and add orderdict to m5.utilNathan Binkert
2009-01-19python: Try to isolate the stuff that's in the m5.internal package a bit more.Nathan Binkert
2009-01-19tracing: panic() if people try to use tracing, but TRACING_ON is not set.Nathan Binkert
Also clean things up so that help strings can more easily be added. Move the help function into trace.py
2008-08-03libm5: Create a libm5 static library for embedding m5.Nathan Binkert
This should allow m5 to be more easily embedded into other simulators. The m5 binary adds a simple main function which then calls into the m5 libarary to start the simulation. In order to make this work correctly, it was necessary embed python code directly into the library instead of the zipfile hack. This is because you can't just append the zipfile to the end of a library the way you can a binary. As a result, Python files that are part of the m5 simulator are now compile, marshalled, compressed, and then inserted into the library's data section with a certain symbol name. Additionally, a new Importer was needed to allow python to get at the embedded python code. Small additional changes include: - Get rid of the PYTHONHOME stuff since I don't think anyone ever used it, and it just confuses things. Easy enough to add back if I'm wrong. - Create a few new functions that are key to initializing and running the simulator: initSignals, initM5Python, m5Main. The original code for creating libm5 was inspired by a patch Michael Adler, though the code here was done by me.
2008-06-14Add .m5 configuration directoryNathan Binkert
2008-06-14python: Separate the options parsing stuff. Remove options parsing stuff fromNathan Binkert
main.py so things are a bit more obvious.
2008-06-14python: Move various utility classes into a new m5.util package soNathan Binkert
they're all in the same place. This also involves having just one jobfile.py and moving it into the utils directory to avoid duplication. Lots of improvements to the utility as well. --HG-- rename : src/python/m5/attrdict.py => src/python/m5/util/attrdict.py rename : util/pbs/jobfile.py => src/python/m5/util/jobfile.py rename : src/python/m5/util.py => src/python/m5/util/misc.py rename : src/python/m5/multidict.py => src/python/m5/util/multidict.py rename : util/stats/orderdict.py => src/python/m5/util/orderdict.py
2007-08-02python: Improve support for python calling back to C++ member functions.Nathan Binkert
Add support for declaring SimObjects to swig so their members can be wrapped. Make sim_object.i only contain declarations for SimObject. Create system.i to contain declarations for System. Update python code to properly call the C++ given the new changes. --HG-- extra : convert_revision : 82076ee69e8122d56e91b92d6767e356baae420a
2007-07-23Major changes to how SimObjects are created and initialized. Almost allNathan Binkert
creation and initialization now happens in python. Parameter objects are generated and initialized by python. The .ini file is now solely for debugging purposes and is not used in construction of the objects in any way. --HG-- extra : convert_revision : 7e722873e417cb3d696f2e34c35ff488b7bff4ed
2007-05-27Move SimObject python files alongside the C++ and fixNathan Binkert
the SConscript files so that only the objects that are actually available in a given build are compiled in. Remove a bunch of files that aren't used anymore. --HG-- rename : src/python/m5/objects/AlphaTLB.py => src/arch/alpha/AlphaTLB.py rename : src/python/m5/objects/SparcTLB.py => src/arch/sparc/SparcTLB.py rename : src/python/m5/objects/BaseCPU.py => src/cpu/BaseCPU.py rename : src/python/m5/objects/FuncUnit.py => src/cpu/FuncUnit.py rename : src/python/m5/objects/IntrControl.py => src/cpu/IntrControl.py rename : src/python/m5/objects/MemTest.py => src/cpu/memtest/MemTest.py rename : src/python/m5/objects/FUPool.py => src/cpu/o3/FUPool.py rename : src/python/m5/objects/FuncUnitConfig.py => src/cpu/o3/FuncUnitConfig.py rename : src/python/m5/objects/O3CPU.py => src/cpu/o3/O3CPU.py rename : src/python/m5/objects/OzoneCPU.py => src/cpu/ozone/OzoneCPU.py rename : src/python/m5/objects/SimpleOzoneCPU.py => src/cpu/ozone/SimpleOzoneCPU.py rename : src/python/m5/objects/BadDevice.py => src/dev/BadDevice.py rename : src/python/m5/objects/Device.py => src/dev/Device.py rename : src/python/m5/objects/DiskImage.py => src/dev/DiskImage.py rename : src/python/m5/objects/Ethernet.py => src/dev/Ethernet.py rename : src/python/m5/objects/Ide.py => src/dev/Ide.py rename : src/python/m5/objects/Pci.py => src/dev/Pci.py rename : src/python/m5/objects/Platform.py => src/dev/Platform.py rename : src/python/m5/objects/SimConsole.py => src/dev/SimConsole.py rename : src/python/m5/objects/SimpleDisk.py => src/dev/SimpleDisk.py rename : src/python/m5/objects/Uart.py => src/dev/Uart.py rename : src/python/m5/objects/AlphaConsole.py => src/dev/alpha/AlphaConsole.py rename : src/python/m5/objects/Tsunami.py => src/dev/alpha/Tsunami.py rename : src/python/m5/objects/T1000.py => src/dev/sparc/T1000.py rename : src/python/m5/objects/Bridge.py => src/mem/Bridge.py rename : src/python/m5/objects/Bus.py => src/mem/Bus.py rename : src/python/m5/objects/MemObject.py => src/mem/MemObject.py rename : src/python/m5/objects/PhysicalMemory.py => src/mem/PhysicalMemory.py rename : src/python/m5/objects/BaseCache.py => src/mem/cache/BaseCache.py rename : src/python/m5/objects/CoherenceProtocol.py => src/mem/cache/coherence/CoherenceProtocol.py rename : src/python/m5/objects/Repl.py => src/mem/cache/tags/Repl.py rename : src/python/m5/objects/Process.py => src/sim/Process.py rename : src/python/m5/objects/Root.py => src/sim/Root.py rename : src/python/m5/objects/System.py => src/sim/System.py extra : convert_revision : 173f8764bafa8ef899198438fa5573874e407321
2007-05-11Move full CPU sim object stuff into the encumbered directoryNathan Binkert
--HG-- extra : convert_revision : 788068dd4f4994d0016dba7e8705359d45a3a45c
2007-04-18Move the turbolaser python simobject stuff into theNathan Binkert
encumbered directory --HG-- extra : convert_revision : 7062ce81183b989f0d922b00d02433633474a854
2007-04-12Completely re-work how the scons framework incorporates swigNathan Binkert
and python code into m5 to allow swig an python code to easily added by any SConscript instead of just the one in src/python. This provides SwigSource and PySource for adding new files to m5 (similar to Source for C++). Also provides SimObject for including files that contain SimObject information and build the m5.objects __init__.py file. --HG-- extra : convert_revision : 38b50a0629846ef451ed02f96fe3633947df23eb
2007-04-12Add a scons hack to force symlinks to the swig .i filesNathan Binkert
to be created --HG-- extra : convert_revision : 826cc692614528f987c80c3410cb025190f0a4e0
2007-03-10Rework the way SCons recurses into subdirectories, making itNathan Binkert
automatic. The point is that now a subdirectory can be added to the build process just by creating a SConscript file in it. The process has two passes. On the first pass, all subdirs of the root of the tree are searched for SConsopts files. These files contain any command line options that ought to be added for a particular subdirectory. On the second pass, all subdirs of the src directory are searched for SConscript files. These files describe how to build any given subdirectory. I have added a Source() function. Any file (relative to the directory in which the SConscript resides) passed to that function is added to the build. Clean up everything to take advantage of Source(). function is added to the list of files to be built. --HG-- extra : convert_revision : 103f6b490d2eb224436688c89cdc015211c4fd30
2007-03-02Factor code out of main.cc and main.i into a bunch of filesNathan Binkert
so things are organized in a more sensible manner. Take apart finalInit and expose the individual functions which are now called from python. Make checkpointing a bit easier to use. --HG-- extra : convert_revision : f470ddabbb47103e7b4734ef753c40089f2dcd9d
2007-02-21Automatically generate m5/internal/__init__.py and swig/init.ccNathan Binkert
based on the swig modules that we have --HG-- extra : convert_revision : 2fd12db39d46608a62b9df36c2b36189f1d2bc30
2007-02-17Get rid of the Statistics and Statreset ParamContexts, andNathan Binkert
expose all of the relevant functionality to python. Clean up the mysql code while we're at it. --HG-- extra : convert_revision : 5b711202a5a452b8875ebefb136a156b65c24279
2007-02-13Rearrange traceflags.py so that the file generation only happens ifNathan Binkert
the script is invoked as main. This allows us to import traceflags.py if we just want the list of available flags. Embed traceflags.py into the zipfile so it can be accessed from the python side of things. With this, print an error on invalid flags and add --trace-help option that will print out the list of trace flags that are compiled in. If a flag is prefixed with a '-', now that flag will be disabled. --HG-- extra : convert_revision : 2260a596b07d127c582ff73474dbbdb0583db524
2007-02-09Get rid of the Random context and add the support directly to python.Nathan Binkert
We don't currently use randomness much, so I didn't go too far, but in the future, we may want to actually expose the random number values themselves to python. For now, I'll at least let you seed it. While we're at it, clean up a clearly bad way for generating random doubles. --HG-- extra : convert_revision : df2aa8b58dd0d9c2a7c771668a760b2df8db1e11
2007-02-09Get rid of the Trace ParamContext and give python directNathan Binkert
access to enabling/disabling tracing. Command line is unchanged except for the removal of --trace-cycle since it's not so clear what that means. --HG-- extra : convert_revision : c0164d92d3615d76d0c6acaabaafd92a9278212a
2006-12-21Expose the C++ event queue to python via the python functionNathan Binkert
m5.internal.event.create(). It takes a python object and a Tick and calls process() when the Tick occurs. --HG-- extra : convert_revision : 5e4c9728982b206163ff51e6850a1497d85ad7a3
2006-12-21Create a wrapper function to more easily add swig stuff to the buildNathan Binkert
--HG-- extra : convert_revision : 3aaf540a9e314a88a8945579398f0d79aa85d5cf
2006-11-13Expose debugBreakCycle through swig and get rid ofNathan Binkert
the Debug param context --HG-- extra : convert_revision : 40e9dcfa9faedbe0c90a43f908f20a7c14ded6a4
2006-11-12Create a module called internal where swigged stuff goes.Nathan Binkert
Rename cc_main to internal.main --HG-- extra : convert_revision : e938005f600fbf8a43435e29426a948f4501f072
2006-07-10Migrate most of main() and and all option parsing to pythonNathan Binkert
configs/test/fs.py: configs/test/test.py: update for the new way that m5 deals with options src/python/SConscript: Compile AUTHORS, LICENSE, README, and RELEASE_NOTES into the python stuff. src/python/m5/__init__.py: redo the way options work. Move them all to main.py src/sim/main.cc: Migrate more functionality for main() into python. Namely option parsing src/python/m5/attrdict.py: A dictionary object that overrides attribute access to do item access. src/python/m5/main.py: The new location for M5's option parsing, and the main() routine to set up the simulation. --HG-- extra : convert_revision : c86b87a9f508bde1994088e23fd470c7753ee4c1
2006-06-17Rename SWIG "main" module to "cc_main" so it'sSteve Reinhardt
clear from the Python side that this is the interface to C++. src/SConscript: main_wrap.cc -> cc_main_wrap.cc src/python/SConscript: src/python/m5/__init__.py: src/sim/main.cc: s/main/cc_main/ src/python/m5/config.py: s/main/cc_main/ Also directly import cc_main so we don't need to put the "m5." in front all the time. --HG-- extra : convert_revision : 755552f70cf671881ff31e476c677b95ef12950d
2006-06-09Move main control from C++ into Python.Steve Reinhardt
User script now invokes initialization and simulation loop after building configuration. These functions are exported from C++ to Python using SWIG. SConstruct: Set up SWIG builder & scanner. Set up symlinking of source files into build directory (by not disabling the default behavior). configs/test/test.py: Rewrite to use new script-driven interface. Include a sample option. src/SConscript: Set up symlinking of source files into build directory (by not disabling the default behavior). Add SWIG-generated main_wrap.cc to source list. src/arch/SConscript: Set up symlinking of source files into build directory (by not disabling the default behavior). src/arch/alpha/ev5.cc: src/arch/alpha/isa/decoder.isa: src/cpu/o3/alpha_cpu_impl.hh: src/cpu/trace/opt_cpu.cc: src/cpu/trace/trace_cpu.cc: src/sim/pseudo_inst.cc: src/sim/root.cc: src/sim/serialize.cc: src/sim/syscall_emul.cc: SimExit() is now exitSimLoop(). src/cpu/base.cc: SimExitEvent is now SimLoopExitEvent src/python/SConscript: Add SWIG build command for main.i. Use python/m5 in build dir as source for zip archive... easy now with file duplication enabled. src/python/m5/__init__.py: - Move copyright notice back to C++ so we can print it right away, even for interactive sessions. - Get rid of argument parsing code; just provide default option descriptors for user script to call optparse with. - Don't clutter m5 namespace by sucking in all of m5.config and m5.objects. - Move instantiate() function here from config.py. src/python/m5/config.py: - Move instantiate() function to __init__.py. - Param.Foo deferred type lookups must use m5.objects namespace now (not m5). src/python/m5/objects/AlphaConsole.py: src/python/m5/objects/AlphaFullCPU.py: src/python/m5/objects/AlphaTLB.py: src/python/m5/objects/BadDevice.py: src/python/m5/objects/BaseCPU.py: src/python/m5/objects/BaseCache.py: src/python/m5/objects/Bridge.py: src/python/m5/objects/Bus.py: src/python/m5/objects/CoherenceProtocol.py: src/python/m5/objects/Device.py: src/python/m5/objects/DiskImage.py: src/python/m5/objects/Ethernet.py: src/python/m5/objects/Ide.py: src/python/m5/objects/IntrControl.py: src/python/m5/objects/MemObject.py: src/python/m5/objects/MemTest.py: src/python/m5/objects/Pci.py: src/python/m5/objects/PhysicalMemory.py: src/python/m5/objects/Platform.py: src/python/m5/objects/Process.py: src/python/m5/objects/Repl.py: src/python/m5/objects/Root.py: src/python/m5/objects/SimConsole.py: src/python/m5/objects/SimpleDisk.py: src/python/m5/objects/System.py: src/python/m5/objects/Tsunami.py: src/python/m5/objects/Uart.py: Fix up imports (m5 namespace no longer includes m5.config). src/sim/eventq.cc: src/sim/eventq.hh: Support for Python-called simulate() function: - Use IsExitEvent flag to signal events that want to exit the simulation loop gracefully (instead of calling exit() to terminate the process). - Modify interface to hand exit event object back to caller so it can be inspected for cause. src/sim/host.hh: Add MaxTick constant. src/sim/main.cc: Move copyright notice back to C++ so we can print it right away, even for interactive sessions. Use PYTHONPATH environment var to set module path (instead of clunky code injection method). Move main control from here into Python: - Separate initialization code and simulation loop into separate functions callable from Python. - Make Python interpreter invocation more pure (more like directly invoking interpreter). Add -i and -p flags (only options on binary itself; other options processed by Python). Import readline package when using interactive mode. src/sim/sim_events.cc: SimExitEvent is now SimLoopExitEvent, and uses IsSimExit flag to terminate loop (instead of exiting simulator process). src/sim/sim_events.hh: SimExitEvent is now SimLoopExitEvent, and uses IsSimExit flag to terminate loop (instead of exiting simulator process). Get rid of a few unused constructors. src/sim/sim_exit.hh: SimExit() is now exitSimLoop(). Get rid of unused functions. Add comments. --HG-- extra : convert_revision : 280b0d671516b25545a6f24cefa64a68319ff3d4
2006-05-31Updated Authors from bk prs infoAli Saidi
--HG-- extra : convert_revision : 77f475b156d81c03a2811818fa23593d5615c685
2006-05-30Link in Python interpreter.Steve Reinhardt
Use embedded zip archive to carry Python code instead of homegrown embedded string/file mechanism. Do argument parsing in Python instead of C++. SConstruct: Add Python interpreter include path & library. Define two new simple builders which copy & concatenate files, respectively, for use by the Python embedded zipfile code. src/SConscript: Encapsulate environment creation in a function. Add code to append Python zip archive to final executable. Eliminate references to obsolete files. src/python/SConscript: Rewrite to generate embedded zip archive of Python code (replacing old "embedded string" mechanism). src/python/m5/__init__.py: Move main arg-parsing loop here (out of C++ main()). src/python/m5/config.py: Minor fix (version incompatibility?). src/sim/main.cc: Invoke embedded Python interpreter to parse args and generate config.ini, replacing C++ arg parsing code. --HG-- extra : convert_revision : 72d21236b2bee139ff39ba4cf031a4a1f8560029