two_level.py revision 13774:a1be2a0c55f2
1# -*- coding: utf-8 -*- 2# Copyright (c) 2015 Jason Power 3# All rights reserved. 4# 5# Redistribution and use in source and binary forms, with or without 6# modification, are permitted provided that the following conditions are 7# met: redistributions of source code must retain the above copyright 8# notice, this list of conditions and the following disclaimer; 9# redistributions in binary form must reproduce the above copyright 10# notice, this list of conditions and the following disclaimer in the 11# documentation and/or other materials provided with the distribution; 12# neither the name of the copyright holders nor the names of its 13# contributors may be used to endorse or promote products derived from 14# this software without specific prior written permission. 15# 16# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27# 28# Authors: Jason Power 29 30""" This file creates a single CPU and a two-level cache system. 31This script takes a single parameter which specifies a binary to execute. 32If none is provided it executes 'hello' by default (mostly used for testing) 33 34See Part 1, Chapter 3: Adding cache to the configuration script in the 35learning_gem5 book for more information about this script. 36This file exports options for the L1 I/D and L2 cache sizes. 37 38IMPORTANT: If you modify this file, it's likely that the Learning gem5 book 39 also needs to be updated. For now, email Jason <power.jg@gmail.com> 40 41""" 42 43from __future__ import print_function 44from __future__ import absolute_import 45 46# import the m5 (gem5) library created when gem5 is built 47import m5 48# import all of the SimObjects 49from m5.objects import * 50 51# Add the common scripts to our path 52m5.util.addToPath('../../') 53 54# import the caches which we made 55from caches import * 56 57# import the SimpleOpts module 58from common import SimpleOpts 59 60# Set the usage message to display 61SimpleOpts.set_usage("usage: %prog [options] <binary to execute>") 62 63# Finalize the arguments and grab the opts so we can pass it on to our objects 64(opts, args) = SimpleOpts.parse_args() 65 66# get ISA for the default binary to run. This is mostly for simple testing 67isa = str(m5.defines.buildEnv['TARGET_ISA']).lower() 68 69# Default to running 'hello', use the compiled ISA to find the binary 70binary = 'tests/test-progs/hello/bin/' + isa + '/linux/hello' 71 72# Check if there was a binary passed in via the command line and error if 73# there are too many arguments 74if len(args) == 1: 75 binary = args[0] 76elif len(args) > 1: 77 SimpleOpts.print_help() 78 m5.fatal("Expected a binary to execute as positional argument") 79 80# create the system we are going to simulate 81system = System() 82 83# Set the clock fequency of the system (and all of its children) 84system.clk_domain = SrcClockDomain() 85system.clk_domain.clock = '1GHz' 86system.clk_domain.voltage_domain = VoltageDomain() 87 88# Set up the system 89system.mem_mode = 'timing' # Use timing accesses 90system.mem_ranges = [AddrRange('512MB')] # Create an address range 91 92# Create a simple CPU 93system.cpu = TimingSimpleCPU() 94 95# Create an L1 instruction and data cache 96system.cpu.icache = L1ICache(opts) 97system.cpu.dcache = L1DCache(opts) 98 99# Connect the instruction and data caches to the CPU 100system.cpu.icache.connectCPU(system.cpu) 101system.cpu.dcache.connectCPU(system.cpu) 102 103# Create a memory bus, a coherent crossbar, in this case 104system.l2bus = L2XBar() 105 106# Hook the CPU ports up to the l2bus 107system.cpu.icache.connectBus(system.l2bus) 108system.cpu.dcache.connectBus(system.l2bus) 109 110# Create an L2 cache and connect it to the l2bus 111system.l2cache = L2Cache(opts) 112system.l2cache.connectCPUSideBus(system.l2bus) 113 114# Create a memory bus 115system.membus = SystemXBar() 116 117# Connect the L2 cache to the membus 118system.l2cache.connectMemSideBus(system.membus) 119 120# create the interrupt controller for the CPU 121system.cpu.createInterruptController() 122 123# For x86 only, make sure the interrupts are connected to the memory 124# Note: these are directly connected to the memory bus and are not cached 125if m5.defines.buildEnv['TARGET_ISA'] == "x86": 126 system.cpu.interrupts[0].pio = system.membus.master 127 system.cpu.interrupts[0].int_master = system.membus.slave 128 system.cpu.interrupts[0].int_slave = system.membus.master 129 130# Connect the system up to the membus 131system.system_port = system.membus.slave 132 133# Create a DDR3 memory controller 134system.mem_ctrl = DDR3_1600_8x8() 135system.mem_ctrl.range = system.mem_ranges[0] 136system.mem_ctrl.port = system.membus.master 137 138# Create a process for a simple "Hello World" application 139process = Process() 140# Set the command 141# cmd is a list which begins with the executable (like argv) 142process.cmd = [binary] 143# Set the cpu to use the process as its workload and create thread contexts 144system.cpu.workload = process 145system.cpu.createThreads() 146 147# set up the root SimObject and start the simulation 148root = Root(full_system = False, system = system) 149# instantiate all of the objects we've created above 150m5.instantiate() 151 152print("Beginning simulation!") 153exit_event = m5.simulate() 154print('Exiting @ tick %i because %s' % (m5.curTick(), exit_event.getCause())) 155