# Copyright (c) 2016 Georgia Institute of Technology
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#
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# modification, are permitted provided that the following conditions are
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# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
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# 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
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# Author: Tushar Krishna

import argparse
import os
import sys

import m5
from m5.defines import buildEnv
from m5.objects import *
from m5.util import addToPath

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 = argparse.ArgumentParser()
Options.addNoISAOptions(parser)

parser.add_argument(
    "--synthetic",
    default="uniform_random",
    choices=[
        "uniform_random",
        "tornado",
        "bit_complement",
        "bit_reverse",
        "bit_rotation",
        "neighbor",
        "shuffle",
        "transpose",
    ],
)

parser.add_argument(
    "-i",
    "--injectionrate",
    type=float,
    default=0.1,
    metavar="I",
    help="Injection rate in packets per cycle per node. \
                        Takes decimal value between 0 to 1 (eg. 0.225). \
                        Number of digits after 0 depends upon --precision.",
)

parser.add_argument(
    "--precision",
    type=int,
    default=3,
    help="Number of digits of precision after decimal point\
                        for injection rate",
)

parser.add_argument(
    "--sim-cycles", type=int, default=1000, help="Number of simulation cycles"
)

parser.add_argument(
    "--num-packets-max",
    type=int,
    default=-1,
    help="Stop injecting after --num-packets-max.\
                        Set to -1 to disable.",
)

parser.add_argument(
    "--single-sender-id",
    type=int,
    default=-1,
    help="Only inject from this sender.\
                        Set to -1 to disable.",
)

parser.add_argument(
    "--single-dest-id",
    type=int,
    default=-1,
    help="Only send to this destination.\
                        Set to -1 to disable.",
)

parser.add_argument(
    "--inj-vnet",
    type=int,
    default=-1,
    choices=[-1, 0, 1, 2],
    help="Only inject in this vnet (0, 1 or 2).\
                        0 and 1 are 1-flit, 2 is 5-flit.\
                        Set to -1 to inject randomly in all vnets.",
)

#
# Add the ruby specific and protocol specific options
#
Ruby.define_options(parser)

args = parser.parse_args()

cpus = [
    GarnetSyntheticTraffic(
        num_packets_max=args.num_packets_max,
        single_sender=args.single_sender_id,
        single_dest=args.single_dest_id,
        sim_cycles=args.sim_cycles,
        traffic_type=args.synthetic,
        inj_rate=args.injectionrate,
        inj_vnet=args.inj_vnet,
        precision=args.precision,
        num_dest=args.num_dirs,
    )
    for i in range(args.num_cpus)
]

# create the desired simulated system
system = System(cpu=cpus, mem_ranges=[AddrRange(args.mem_size)])


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

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

Ruby.create_system(args, False, system)

# Create a seperate clock domain for Ruby
system.ruby.clk_domain = SrcClockDomain(
    clock=args.ruby_clock, voltage_domain=system.voltage_domain
)

i = 0
for ruby_port in system.ruby._cpu_ports:
    #
    # Tie the cpu test ports to the ruby cpu port
    #
    cpus[i].test = ruby_port.in_ports
    i += 1

# -----------------------
# 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("1ps")

# instantiate configuration
m5.instantiate()

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

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