xref: /gem5/src/mem/ruby/system/Sequencer.py

# Copyright (c) 2009 Advanced Micro Devices, Inc.
# 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: Steve Reinhardt
#          Brad Beckmann

from m5.params import *
from m5.proxy import *
from m5.objects.ClockedObject import ClockedObject

class RubyPort(ClockedObject):
   type = 'RubyPort'
   abstract = True
   cxx_header = "mem/ruby/system/RubyPort.hh"
   version = Param.Int(0, "")

   slave = VectorSlavePort("CPU slave port")
   master = VectorMasterPort("CPU master port")
   pio_master_port = MasterPort("Ruby mem master port")
   mem_master_port = MasterPort("Ruby mem master port")
   pio_slave_port = SlavePort("Ruby pio slave port")
   mem_slave_port = SlavePort("Ruby memory port")

   using_ruby_tester = Param.Bool(False, "")
   no_retry_on_stall = Param.Bool(False, "")
   ruby_system = Param.RubySystem(Parent.any, "")
   system = Param.System(Parent.any, "system object")
   support_data_reqs = Param.Bool(True, "data cache requests supported")
   support_inst_reqs = Param.Bool(True, "inst cache requests supported")
   is_cpu_sequencer = Param.Bool(True, "connected to a cpu")

class RubyPortProxy(RubyPort):
   type = 'RubyPortProxy'
   cxx_header = "mem/ruby/system/RubyPortProxy.hh"

class RubySequencer(RubyPort):
   type = 'RubySequencer'
   cxx_class = 'Sequencer'
   cxx_header = "mem/ruby/system/Sequencer.hh"

   icache = Param.RubyCache("")
   dcache = Param.RubyCache("")
   # Cache latencies currently assessed at the beginning of each access
   # NOTE: Setting these values to a value greater than one will result in
   # O3 CPU pipeline bubbles and negatively impact performance
   # TODO: Latencies should be migrated into each top-level cache controller
   icache_hit_latency = Param.Cycles(1, "Inst cache hit latency")
   dcache_hit_latency = Param.Cycles(1, "Data cache hit latency")
   max_outstanding_requests = Param.Int(16,
       "max requests (incl. prefetches) outstanding")
   deadlock_threshold = Param.Cycles(500000,
       "max outstanding cycles for a request before deadlock/livelock declared")
   garnet_standalone = Param.Bool(False, "")
   # id used by protocols that support multiple sequencers per controller
   # 99 is the dummy default value
   coreid = Param.Int(99, "CorePair core id")

class DMASequencer(RubyPort):
   type = 'DMASequencer'
   cxx_header = "mem/ruby/system/DMASequencer.hh"
   max_outstanding_requests = Param.Int(64, "max outstanding requests")