1# Copyright (c) 2012 ARM Limited 2# All rights reserved. 3# 4# The license below extends only to copyright in the software and shall 5# not be construed as granting a license to any other intellectual 6# property including but not limited to intellectual property relating 7# to a hardware implementation of the functionality of the software 8# licensed hereunder. You may use the software subject to the license 9# terms below provided that you ensure that this notice is replicated 10# unmodified and in its entirety in all distributions of the software, 11# modified or unmodified, in source code or in binary form. 12# 13# Redistribution and use in source and binary forms, with or without 14# modification, are permitted provided that the following conditions are 15# met: redistributions of source code must retain the above copyright 16# notice, this list of conditions and the following disclaimer; 17# redistributions in binary form must reproduce the above copyright 18# notice, this list of conditions and the following disclaimer in the 19# documentation and/or other materials provided with the distribution; 20# neither the name of the copyright holders nor the names of its 21# contributors may be used to endorse or promote products derived from 22# this software without specific prior written permission. 23# 24# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 25# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 26# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 27# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 28# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 29# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 30# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 31# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 32# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 34# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35# 36# Authors: Andreas Hansson 37 38import m5 39from m5.objects import * 40 41import argparse 42 43parser = argparse.ArgumentParser(description='Simple memory tester') 44parser.add_argument('--bandwidth', default=None) 45parser.add_argument('--latency', default=None) 46parser.add_argument('--latency_var', default=None) 47 48args = parser.parse_args() 49 50# even if this is only a traffic generator, call it cpu to make sure 51# the scripts are happy 52try: 53 cpu = TrafficGen( 54 config_file=os.path.join(os.path.dirname(os.path.abspath(__file__)), 55 "tgen-simple-mem.cfg")) 56except NameError: 57 m5.fatal("protobuf required for simple memory test") 58 59class MyMem(SimpleMemory): 60 if args.bandwidth: 61 bandwidth = args.bandwidth 62 if args.latency: 63 latency = args.latency 64 if args.latency_var: 65 latency_var = args.latency_var 66 67# system simulated 68system = System(cpu = cpu, physmem = MyMem(), 69 membus = IOXBar(width = 16), 70 clk_domain = SrcClockDomain(clock = '1GHz', 71 voltage_domain = 72 VoltageDomain())) 73 74# add a communication monitor, and also trace all the packets and 75# calculate and verify stack distance 76system.monitor = CommMonitor() 77system.monitor.trace = MemTraceProbe(trace_file = "monitor.ptrc.gz") 78system.monitor.stackdist = StackDistProbe(verify = True) 79 80# connect the traffic generator to the bus via a communication monitor 81system.cpu.port = system.monitor.slave 82system.monitor.master = system.membus.slave 83 84# connect the system port even if it is not used in this example 85system.system_port = system.membus.slave 86 87# connect memory to the membus 88system.physmem.port = system.membus.master 89 90# ----------------------- 91# run simulation 92# ----------------------- 93 94root = Root(full_system = False, system = system) 95root.system.mem_mode = 'timing' 96 97m5.instantiate() 98exit_event = m5.simulate(100000000000) 99if exit_event.getCause() != "simulate() limit reached": 100 exit(1) 101