1 # -*- coding: utf-8 -*-
2 # Copyright (c) 2015 Jason Power
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.
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.
28 """ This file creates a barebones system and executes 'hello', a simple Hello
30 See Part 1, Chapter 2: Creating a simple configuration script in the
31 learning_gem5 book for more information about this script.
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>
38 from __future__
import print_function
39 from __future__
import absolute_import
42 # import the m5 (gem5) library created when gem5 is built
44 # import all of the SimObjects
45 from m5
.objects
import *
47 # create the system we are going to simulate
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()
56 system
.mem_mode
= 'timing' # Use timing accesses
57 system
.mem_ranges
= [AddrRange('512MB')] # Create an address range
60 system
.cpu
= TimingSimpleCPU()
62 # Create a memory bus, a system crossbar, in this case
63 system
.membus
= SystemXBar()
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
69 # create the interrupt controller for the CPU and connect to the membus
70 system
.cpu
.createInterruptController()
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
79 # Create a DDR3 memory controller and connect it to the membus
80 system
.mem_ctrl
= DDR3_1600_8x8()
81 system
.mem_ctrl
.range = system
.mem_ranges
[0]
82 system
.mem_ctrl
.port
= system
.membus
.master
84 # Connect the system up to the membus
85 system
.system_port
= system
.membus
.slave
87 # get ISA for the binary to run.
88 isa
= str(m5
.defines
.buildEnv
['TARGET_ISA']).lower()
90 # Default to running 'hello', use the compiled ISA to find the binary
91 # grab the specific path to the binary
92 thispath
= os
.path
.dirname(os
.path
.realpath(__file__
))
93 binary
= os
.path
.join(thispath
, '../../../',
94 'tests/test-progs/hello/bin/', isa
, 'linux/hello')
96 # Create a process for a simple "Hello World" application
99 # cmd is a list which begins with the executable (like argv)
100 process
.cmd
= [binary
]
101 # Set the cpu to use the process as its workload and create thread contexts
102 system
.cpu
.workload
= process
103 system
.cpu
.createThreads()
105 # set up the root SimObject and start the simulation
106 root
= Root(full_system
= False, system
= system
)
107 # instantiate all of the objects we've created above
110 print("Beginning simulation!")
111 exit_event
= m5
.simulate()
112 print('Exiting @ tick %i because %s' % (m5
.curTick(), exit_event
.getCause()))