f065f9941b
Added a new directory in configs (learning_gem5) to hold the scripts that are used in the book. See http://lowepower.com/jason/learning_gem5/ for a working copy. For now, only the scripts in Part 1: Getting started with gem5 have been added. A separate patch adds tests for these scripts. Committed by: Nilay Vaish <nilay@cs.wisc.edu>
107 lines
4.2 KiB
Python
107 lines
4.2 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright (c) 2015 Jason Power
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met: redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer;
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# redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution;
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# neither the name of the copyright holders nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# Authors: Jason Power
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""" This file creates a barebones system and executes 'hello', a simple Hello
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World application.
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See Part 1, Chapter 2: Creating a simple configuration script in the
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learning_gem5 book for more information about this script.
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IMPORTANT: If you modify this file, it's likely that the Learning gem5 book
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also needs to be updated. For now, email Jason <power.jg@gmail.com>
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"""
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# import the m5 (gem5) library created when gem5 is built
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import m5
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# import all of the SimObjects
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from m5.objects import *
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# create the system we are going to simulate
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system = System()
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# Set the clock fequency of the system (and all of its children)
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system.clk_domain = SrcClockDomain()
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system.clk_domain.clock = '1GHz'
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system.clk_domain.voltage_domain = VoltageDomain()
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# Set up the system
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system.mem_mode = 'timing' # Use timing accesses
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system.mem_ranges = [AddrRange('512MB')] # Create an address range
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# Create a simple CPU
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system.cpu = TimingSimpleCPU()
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# Create a memory bus, a system crossbar, in this case
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system.membus = SystemXBar()
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# Hook the CPU ports up to the membus
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system.cpu.icache_port = system.membus.slave
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system.cpu.dcache_port = system.membus.slave
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# create the interrupt controller for the CPU and connect to the membus
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system.cpu.createInterruptController()
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# For x86 only, make sure the interrupts are connected to the memory
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# Note: these are directly connected to the memory bus and are not cached
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if m5.defines.buildEnv['TARGET_ISA'] == "x86":
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system.cpu.interrupts.pio = system.membus.master
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system.cpu.interrupts.int_master = system.membus.slave
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system.cpu.interrupts.int_slave = system.membus.master
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# Create a DDR3 memory controller and connect it to the membus
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system.mem_ctrl = DDR3_1600_x64()
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system.mem_ctrl.range = system.mem_ranges[0]
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system.mem_ctrl.port = system.membus.master
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# Connect the system up to the membus
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system.system_port = system.membus.slave
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# get ISA for the binary to run.
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isa = str(m5.defines.buildEnv['TARGET_ISA']).lower()
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# Run 'hello' and use the compiled ISA to find the binary
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binary = 'tests/test-progs/hello/bin/' + isa + '/linux/hello'
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# Create a process for a simple "Hello World" application
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process = LiveProcess()
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# Set the command
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# cmd is a list which begins with the executable (like argv)
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process.cmd = [binary]
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# Set the cpu to use the process as its workload and create thread contexts
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system.cpu.workload = process
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system.cpu.createThreads()
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# set up the root SimObject and start the simulation
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root = Root(full_system = False, system = system)
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# instantiate all of the objects we've created above
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m5.instantiate()
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print "Beginning simulation!"
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exit_event = m5.simulate()
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print 'Exiting @ tick %i because %s' % (m5.curTick(), exit_event.getCause())
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