configs/learning_gem5/part1/simple.py

   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 """ This file creates a barebones system and executes 'hello', a simple Hello
  29 World application.
  30 See Part 1, Chapter 2: Creating a simple configuration script in the
  31 learning_gem5 book for more information about this script.
  32
  33 IMPORTANT: If you modify this file, it's likely that the Learning gem5 book
  34            also needs to be updated. For now, email Jason <power.jg@gmail.com>
  35
  36 """
  37
  38 from __future__ import print_function
  39 from __future__ import absolute_import
  40
  41
  42 # import the m5 (gem5) library created when gem5 is built
  43 import m5
  44 # import all of the SimObjects
  45 from m5.objects import *
  46
  47 # create the system we are going to simulate
  48 system = System()
  49
  50 # Set the clock fequency of the system (and all of its children)
  51 system.clk_domain = SrcClockDomain()
  52 system.clk_domain.clock = '1GHz'
  53 system.clk_domain.voltage_domain = VoltageDomain()
  54
  55 # Set up the system
  56 system.mem_mode = 'timing'               # Use timing accesses
  57 system.mem_ranges = [AddrRange('512MB')] # Create an address range
  58
  59 # Create a simple CPU
  60 system.cpu = TimingSimpleCPU()
  61
  62 # Create a memory bus, a system crossbar, in this case
  63 system.membus = SystemXBar()
  64
  65 # Hook the CPU ports up to the membus
  66 system.cpu.icache_port = system.membus.slave
  67 system.cpu.dcache_port = system.membus.slave
  68
  69 # create the interrupt controller for the CPU and connect to the membus
  70 system.cpu.createInterruptController()
  71
  72 # For x86 only, make sure the interrupts are connected to the memory
  73 # Note: these are directly connected to the memory bus and are not cached
  74 if m5.defines.buildEnv['TARGET_ISA'] == "x86":
  75     system.cpu.interrupts[0].pio = system.membus.master
  76     system.cpu.interrupts[0].int_master = system.membus.slave
  77     system.cpu.interrupts[0].int_slave = system.membus.master
  78
  79 # Create a DDR3 memory controller and connect it to the membus
  80 system.mem_ctrl = DRAMCtrl()
  81 system.mem_ctrl.dram = DDR3_1600_8x8()
  82 system.mem_ctrl.dram.range = system.mem_ranges[0]
  83 system.mem_ctrl.port = system.membus.master
  84
  85 # Connect the system up to the membus
  86 system.system_port = system.membus.slave
  87
  88 # get ISA for the binary to run.
  89 isa = str(m5.defines.buildEnv['TARGET_ISA']).lower()
  90
  91 # Default to running 'hello', use the compiled ISA to find the binary
  92 # grab the specific path to the binary
  93 thispath = os.path.dirname(os.path.realpath(__file__))
  94 binary = os.path.join(thispath, '../../../',
  95                       'tests/test-progs/hello/bin/', isa, 'linux/hello')
  96
  97 # Create a process for a simple "Hello World" application
  98 process = Process()
  99 # Set the command
 100 # cmd is a list which begins with the executable (like argv)
 101 process.cmd = [binary]
 102 # Set the cpu to use the process as its workload and create thread contexts
 103 system.cpu.workload = process
 104 system.cpu.createThreads()
 105
 106 # set up the root SimObject and start the simulation
 107 root = Root(full_system = False, system = system)
 108 # instantiate all of the objects we've created above
 109 m5.instantiate()
 110
 111 print("Beginning simulation!")
 112 exit_event = m5.simulate()
 113 print('Exiting @ tick %i because %s' % (m5.curTick(), exit_event.getCause()))