| # Copyright (c) 2021 The Regents of the University of California |
| # 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. |
| |
| from ..abstract_l2_cache import AbstractL2Cache |
| from components_library.utils.override import * |
| |
| from m5.objects import MessageBuffer, RubyCache |
| |
| import math |
| |
| |
| class L2Cache(AbstractL2Cache): |
| def __init__( |
| self, l2_size, l2_assoc, network, num_l2Caches, cache_line_size |
| ): |
| super(L2Cache, self).__init__(network, cache_line_size) |
| |
| # This is the cache memory object that stores the cache data and tags |
| self.L2cache = RubyCache( |
| size=l2_size, |
| assoc=l2_assoc, |
| start_index_bit=self.getIndexBit(num_l2Caches), |
| ) |
| |
| self.transitions_per_cycle = "4" |
| |
| def getIndexBit(self, num_l2caches): |
| l2_bits = int(math.log(num_l2caches, 2)) |
| bits = int(math.log(self._cache_line_size, 2)) + l2_bits |
| return bits |
| |
| @overrides(AbstractL2Cache) |
| def connectQueues(self, network): |
| self.DirRequestFromL2Cache = MessageBuffer() |
| self.DirRequestFromL2Cache.out_port = network.in_port |
| self.L1RequestFromL2Cache = MessageBuffer() |
| self.L1RequestFromL2Cache.out_port = network.in_port |
| self.responseFromL2Cache = MessageBuffer() |
| self.responseFromL2Cache.out_port = network.in_port |
| self.unblockToL2Cache = MessageBuffer() |
| self.unblockToL2Cache.in_port = network.out_port |
| self.L1RequestToL2Cache = MessageBuffer() |
| self.L1RequestToL2Cache.in_port = network.out_port |
| self.responseToL2Cache = MessageBuffer() |
| self.responseToL2Cache.in_port = network.out_port |
