# Copyright (c) 2006-2007 The Regents of The University of Michigan
# Copyright (c) 2009 Advanced Micro Devices, Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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import m5
from m5.objects import *
from m5.defines import buildEnv
from m5.util import addToPath
import os, optparse, sys

addToPath('../')

from common import Options
from ruby import Ruby

# Get paths we might need.  It's expected this file is in m5/configs/example.
config_path = os.path.dirname(os.path.abspath(__file__))
config_root = os.path.dirname(config_path)
m5_root = os.path.dirname(config_root)

parser = optparse.OptionParser()
Options.addNoISAOptions(parser)

parser.add_option("--requests", metavar="N", default=100,
                  help="Stop after N requests")
parser.add_option("-f", "--wakeup_freq", metavar="N", default=10,
                  help="Wakeup every N cycles")
parser.add_option("--test-type", type="choice", default="SeriesGetx",
                  choices = ["SeriesGetx", "SeriesGets", "SeriesGetMixed",
                             "Invalidate"],
                  help = "Type of test")
parser.add_option("--percent-writes", type="int", default=100,
                  help="percentage of accesses that should be writes")

#
# Add the ruby specific and protocol specific options
#
Ruby.define_options(parser)
(options, args) = parser.parse_args()

if args:
     print("Error: script doesn't take any positional arguments")
     sys.exit(1)

#
# Select the direct test generator
#
if options.test_type == "SeriesGetx":
    generator = SeriesRequestGenerator(num_cpus = options.num_cpus,
                                       percent_writes = 100)
elif options.test_type == "SeriesGets":
    generator = SeriesRequestGenerator(num_cpus = options.num_cpus,
                                       percent_writes = 0)
elif options.test_type == "SeriesGetMixed":
    generator = SeriesRequestGenerator(num_cpus = options.num_cpus,
                                       percent_writes = options.percent_writes)
elif options.test_type == "Invalidate":
    generator = InvalidateGenerator(num_cpus = options.num_cpus)
else:
    print("Error: unknown direct test generator")
    sys.exit(1)

# Create the M5 system.
system = System(mem_ranges = [AddrRange(options.mem_size)])


# Create a top-level voltage domain and clock domain
system.voltage_domain = VoltageDomain(voltage = options.sys_voltage)

system.clk_domain = SrcClockDomain(clock = options.sys_clock,
                                   voltage_domain = system.voltage_domain)

# Create the ruby random tester
system.cpu = RubyDirectedTester(requests_to_complete = options.requests,
                                generator = generator)

Ruby.create_system(options, False, system)

# Since Ruby runs at an independent frequency, create a seperate clock
system.ruby.clk_domain = SrcClockDomain(clock = options.ruby_clock,
                                        voltage_domain = system.voltage_domain)

assert(options.num_cpus == len(system.ruby._cpu_ports))

for ruby_port in system.ruby._cpu_ports:
    #
    # Tie the ruby tester ports to the ruby cpu ports
    #
    system.cpu.cpuPort = ruby_port.slave

# -----------------------
# run simulation
# -----------------------

root = Root( full_system = False, system = system )
root.system.mem_mode = 'timing'

# Not much point in this being higher than the L1 latency
m5.ticks.setGlobalFrequency('1ns')

# instantiate configuration
m5.instantiate()

# simulate until program terminates
exit_event = m5.simulate(options.abs_max_tick)

print('Exiting @ tick', m5.curTick(), 'because', exit_event.getCause())