PlatformConfig.py revision 11889 
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4# Copyright (c) 2017, Centre National de la Recherche Scientifique (CNRS)
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38# Authors: Andreas Sandberg
39#          Pierre-Yves Peneau
40
41import m5.objects
42import inspect
43import sys
44from m5.util import fatal
45from textwrap import TextWrapper
46
47# Dictionary of mapping names of real CPU models to classes.
48_platform_classes = {}
49
50# Platform aliases. The platforms listed here might not be compiled,
51# we make sure they exist before we add them to the platform list.
52_platform_aliases_all = [
53    ("RealView_EB", "RealViewEB"),
54    ("RealView_PBX", "RealViewPBX"),
55    ("VExpress_GEM5", "VExpress_GEM5_V1"),
56    ]
57
58# Filtered list of aliases. Only aliases for existing platforms exist
59# in this list.
60_platform_aliases = {}
61
62def is_platform_class(cls):
63    """Determine if a class is a Platform that can be instantiated"""
64
65    # We can't use the normal inspect.isclass because the ParamFactory
66    # and ProxyFactory classes have a tendency to confuse it.
67    try:
68        return issubclass(cls, m5.objects.Platform) and \
69            not cls.abstract
70    except (TypeError, AttributeError):
71        return False
72
73def get(name):
74    """Get a platform class from a user provided class name."""
75
76    real_name = _platform_aliases.get(name, name)
77
78    try:
79        return _platform_classes[real_name]
80    except KeyError:
81        fatal("%s is not a valid Platform model." % (name,))
82
83def print_platform_list():
84    """Print a list of available Platform classes including their aliases."""
85
86    print "Available Platform classes:"
87    doc_wrapper = TextWrapper(initial_indent="\t\t", subsequent_indent="\t\t")
88    for name, cls in _platform_classes.items():
89        print "\t%s" % name
90
91        # Try to extract the class documentation from the class help
92        # string.
93        doc = inspect.getdoc(cls)
94        if doc:
95            for line in doc_wrapper.wrap(doc):
96                print line
97
98    if _platform_aliases:
99        print "\Platform aliases:"
100        for alias, target in _platform_aliases.items():
101            print "\t%s => %s" % (alias, target)
102
103def platform_names():
104    """Return a list of valid Platform names."""
105    return _platform_classes.keys() + _platform_aliases.keys()
106
107# Add all Platforms in the object hierarchy.
108for name, cls in inspect.getmembers(m5.objects, is_platform_class):
109    _platform_classes[name] = cls
110
111for alias, target in _platform_aliases_all:
112    if target in _platform_classes:
113        _platform_aliases[alias] = target
114