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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
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