SystemC.py revision 13081:fd1b50840830 
1# Copyright 2018 Google, Inc.
2#
3# Redistribution and use in source and binary forms, with or without
4# modification, are permitted provided that the following conditions are
5# met: redistributions of source code must retain the above copyright
6# notice, this list of conditions and the following disclaimer;
7# redistributions in binary form must reproduce the above copyright
8# notice, this list of conditions and the following disclaimer in the
9# documentation and/or other materials provided with the distribution;
10# neither the name of the copyright holders nor the names of its
11# contributors may be used to endorse or promote products derived from
12# this software without specific prior written permission.
13#
14# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
15# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
16# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
17# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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19# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
20# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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23# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25#
26# Authors: Gabe Black
27
28from m5.SimObject import SimObject
29
30# This class represents the systemc kernel. There should be exactly one in the
31# simulation. It receives gem5 SimObject lifecycle callbacks (init, regStats,
32# etc.) and manages the lifecycle of the systemc simulation accordingly.
33# It also acts as a collecting point for systemc related control functionality.
34class SystemC_Kernel(SimObject):
35    type = 'SystemC_Kernel'
36    cxx_class = 'sc_gem5::Kernel'
37    cxx_header = 'systemc/core/kernel.hh'
38
39    class ScMainResult(object):
40        def __init__(self, code, message):
41            self.code = code
42            self.message = message
43
44    def sc_main(self, *args):
45        '''Call the systemc sc_main function with the given string args'''
46        from _m5.systemc import sc_main
47        sc_main(*args)
48
49    def sc_main_result(self):
50        '''Retrieve and return the results of running sc_main'''
51        from _m5.systemc import sc_main_result_code, sc_main_result_str
52        return SystemC_Kernel.ScMainResult(
53                sc_main_result_code(), sc_main_result_str());
54
55# This class represents systemc sc_object instances in python config files. It
56# inherits from SimObject in python, but the c++ version, sc_core::sc_object,
57# doesn't inherit from gem5's c++ SimObject class.
58class SystemC_ScObject(SimObject):
59    type = 'SystemC_ScObject'
60    abstract = True
61    cxx_class = 'sc_core::sc_object'
62    cxx_header = 'systemc/ext/core/sc_object.hh'
63
64    # Clear cxx_base to stop the c++ binding code from assuming
65    # sc_core::sc_object inherits from SimObject, even though SystemC_ScObject
66    # does on the python side.
67    cxx_base = None
68
69    # Hide the cxx_exports from SimObject since we don't inherit from
70    # SimObject on the c++ side and so don't have those methods to call down
71    # into.
72    locals().update({
73        method.name: (lambda *a, **k: None) for method in SimObject.cxx_exports
74    })
75
76try:
77    import _m5
78except:
79    pass
80else:
81    import _m5.systemc
82    _m5.systemc.python_ready()
83