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+# Copyright (c) 2018 Metempsy Technology Consulting
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met: redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer;
+# redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution;
+# neither the name of the copyright holders nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# Authors: Pau Cabre
+
+# This file is a copy of MemConfig.py / CpuConfig.py, but modified to
+# hanle branch predictors instead of memory controllers / CPUs
+
+from __future__ import print_function
+
+from m5 import fatal
+import m5.objects
+import inspect
+import sys
+from textwrap import TextWrapper
+
+# Dictionary of mapping names of real branch predictor models to classes.
+_bp_classes = {}
+
+
+def is_bp_class(cls):
+ """Determine if a class is a branch predictor that can be instantiated"""
+
+ # We can't use the normal inspect.isclass because the ParamFactory
+ # and ProxyFactory classes have a tendency to confuse it.
+ try:
+ return issubclass(cls, m5.objects.BranchPredictor) and \
+ not cls.abstract
+ except (TypeError, AttributeError):
+ return False
+
+def get(name):
+ """Get a BP class from a user provided class name or alias."""
+
+ try:
+ bp_class = _bp_classes[name]
+ return bp_class
+ except KeyError:
+ print("%s is not a valid BP model." % (name,))
+ sys.exit(1)
+
+def print_bp_list():
+ """Print a list of available BP classes."""
+
+ print("Available BranchPredictor classes:")
+ doc_wrapper = TextWrapper(initial_indent="\t\t", subsequent_indent="\t\t")
+ for name, cls in _bp_classes.items():
+ print("\t%s" % name)
+
+ # Try to extract the class documentation from the class help
+ # string.
+ doc = inspect.getdoc(cls)
+ if doc:
+ for line in doc_wrapper.wrap(doc):
+ print(line)
+
+def bp_names():
+ """Return a list of valid Branch Predictor names."""
+ return _bp_classes.keys()
+
+# Add all BPs in the object hierarchy.
+for name, cls in inspect.getmembers(m5.objects, is_bp_class):
+ _bp_classes[name] = cls
+