MemConfig.py revision 9665:6dbdeee787cc 
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35#
36# Authors: Andreas Sandberg
37#          Andreas Hansson
38
39import m5.objects
40import inspect
41import sys
42from textwrap import  TextWrapper
43
44# Dictionary of mapping names of real memory controller models to
45# classes.
46_mem_classes = {}
47
48# Memory aliases. We make sure they exist before we add them to the
49# fina; list. A target may be specified as a tuple, in which case the
50# first available memory controller model in the tuple will be used.
51_mem_aliases_all = [
52    ("simple_mem", "SimpleMemory"),
53    ("ddr3-1600", "SimpleDDR3"),
54    ("lpddr2_s4-1066", "SimpleLPDDR2_S4"),
55    ("wio-200", "SimpleWideIO"),
56    ]
57
58# Filtered list of aliases. Only aliases for existing memory
59# controllers exist in this list.
60_mem_aliases = {}
61
62
63def is_mem_class(cls):
64    """Determine if a class is a memory controller that can be instantiated"""
65
66    # We can't use the normal inspect.isclass because the ParamFactory
67    # and ProxyFactory classes have a tendency to confuse it.
68    try:
69        return issubclass(cls, m5.objects.AbstractMemory) and \
70            not cls.abstract
71    except TypeError:
72        return False
73
74def get(name):
75    """Get a memory class from a user provided class name or alias."""
76
77    real_name = _mem_aliases.get(name, name)
78
79    try:
80        mem_class = _mem_classes[real_name]
81        return mem_class
82    except KeyError:
83        print "%s is not a valid memory controller." % (name,)
84        sys.exit(1)
85
86def print_mem_list():
87    """Print a list of available memory classes including their aliases."""
88
89    print "Available memory classes:"
90    doc_wrapper = TextWrapper(initial_indent="\t\t", subsequent_indent="\t\t")
91    for name, cls in _mem_classes.items():
92        print "\t%s" % name
93
94        # Try to extract the class documentation from the class help
95        # string.
96        doc = inspect.getdoc(cls)
97        if doc:
98            for line in doc_wrapper.wrap(doc):
99                print line
100
101    if _mem_aliases:
102        print "\nMemory aliases:"
103        for alias, target in _mem_aliases.items():
104            print "\t%s => %s" % (alias, target)
105
106def mem_names():
107    """Return a list of valid memory names."""
108    return _mem_classes.keys() + _mem_aliases.keys()
109
110# Add all memory controllers in the object hierarchy.
111for name, cls in inspect.getmembers(m5.objects, is_mem_class):
112    _mem_classes[name] = cls
113
114for alias, target in _mem_aliases_all:
115    if isinstance(target, tuple):
116        # Some aliases contain a list of memory controller models
117        # sorted in priority order. Use the first target that's
118        # available.
119        for t in target:
120            if t in _mem_classes:
121                _mem_aliases[alias] = t
122                break
123    elif target in _mem_classes:
124        # Normal alias
125        _mem_aliases[alias] = target
126