| # 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_node import AbstractNode |
| |
| from m5.objects import ( |
| ClockDomain, |
| NULL, |
| RubyCache, |
| RubyNetwork, |
| ) |
| |
| class SimpleDirectory(AbstractNode): |
| """A directory or home node (HNF) |
| |
| This simple directory has no cache. It forwards all requests as directly |
| as possible. |
| """ |
| def __init__( |
| self, |
| network: RubyNetwork, |
| cache_line_size: int, |
| clk_domain: ClockDomain, |
| ): |
| super().__init__(network, cache_line_size) |
| |
| # Dummy cache |
| self.cache = RubyCache( |
| dataAccessLatency = 0, |
| tagAccessLatency = 1, |
| size = "128", |
| assoc = 1 |
| ) |
| |
| self.clk_domain = clk_domain |
| |
| # Only used for L1 controllers |
| self.send_evictions = False |
| self.sequencer = NULL |
| |
| self.use_prefetcher = False |
| |
| # Set up home node that allows three hop protocols |
| self.is_HN = True |
| self.enable_DMT = True |
| self.enable_DCT = True |
| |
| # "Owned state" |
| self.allow_SD = True |
| |
| # No cache |
| self.alloc_on_seq_acc = False |
| self.alloc_on_seq_line_write = False |
| self.alloc_on_readshared = False |
| self.alloc_on_readunique = False |
| self.alloc_on_readonce = False |
| self.alloc_on_writeback = False |
| self.dealloc_on_unique = False |
| self.dealloc_on_shared = False |
| self.dealloc_backinv_unique = False |
| self.dealloc_backinv_shared = False |
| |
| # Some reasonable default TBE params |
| self.number_of_TBEs = 32 |
| self.number_of_repl_TBEs = 32 |
| self.number_of_snoop_TBEs = 1 |
| self.unify_repl_TBEs = False |
