import optparse, os, sys

import m5
from m5.objects import *
from DetailedSdram import *

m5.AddToPath('../common')
from FSConfig import *
from SysPaths import *
from Benchmarks import *

parser = optparse.OptionParser()

parser.add_option("-d", "--detailed", action="store_true")
parser.add_option("-t", "--timing", action="store_true")
parser.add_option("-m", "--maxtick", type="int")
parser.add_option("--maxtime", type="float")
parser.add_option("--dual", action="store_true",
                  help="Simulate two systems attached with an ethernet link")
parser.add_option("-b", "--benchmark", action="store", type="string",
                  dest="benchmark",
                  help="Specify the benchmark to run. Available benchmarks: %s"\
                          % DefinedBenchmarks)
parser.add_option("--etherdump", action="store", type="string", dest="etherdump",
                  help="Specify the filename to dump a pcap capture of the ethernet"
                  "traffic")

(options, args) = parser.parse_args()

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


cpu = TimingSimpleCPU()
cpu2 = TimingSimpleCPU()
mem_mode = 'timing'

cpu.clock = '2GHz'
cpu2.clock = '2GHz'

if options.benchmark:
    if options.benchmark not in Benchmarks:
        print "Error benchmark %s has not been defined." % options.benchmark
        print "Valid benchmarks are: %s" % DefinedBenchmarks
        sys.exit(1)
    
    bm = Benchmarks[options.benchmark]
else:
    if options.dual:
        bm = [Machine(), Machine()]
    else:
        bm = [Machine()]

if len(bm) == 2:
    s1 = makeLinuxAlphaSystem(mem_mode, bm[0])
    s1.cpu = cpu
    cpu.connectMemPorts(s1.membus)
    cpu.mem = s1.physmem
    s2 = makeLinuxAlphaSystem(mem_mode, bm[1])
    s2.cpu = cpu2
    cpu2.connectMemPorts(s2.membus)
    cpu2.mem = s2.physmem
    root = makeDualRoot(s1, s2, options.etherdump)
elif len(bm) == 1:
    root = Root(clock = '1THz',
                system = makeLinuxAlphaSystem(mem_mode, bm[0]))
    root.system.cpu = cpu
    root.system.physmem = DetailedSdram(range = AddrRange(bm[0].mem()))
    root.system.physmem.port = root.system.membus.port    
    cpu.connectMemPorts(root.system.membus)
    cpu.mem = root.system.physmem
    cpu.max_insts_all_threads = 1000000000    

else:
    print "Error I don't know how to create more than 2 systems."
    sys.exit(1)

m5.instantiate(root)

if options.maxtick:
    maxtick = options.maxtick
elif options.maxtime:
    simtime = int(options.maxtime * root.clock.value)
    print "simulating for: ", simtime
    maxtick = simtime
else:
    maxtick = -1

exit_event = m5.simulate(maxtick)

while exit_event.getCause() == "checkpoint":
    m5.checkpoint(root, "cpt.%d")
    exit_event = m5.simulate(maxtick - m5.curTick())	

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