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36# Authors: Gabor Dozsa
37
38# This configuration file extends the example ARM big.LITTLE(tm)
39# configuration to enabe dist-gem5 siulations of big.LITTLE systems.
40
41from __future__ import print_function
42from __future__ import absolute_import
43
44import argparse
45import os
46
47import m5
48from m5.objects import *
49
50import fs_bigLITTLE as bL
51m5.util.addToPath("../../dist")
52import sw
53
54
55def addOptions(parser):
56   # Options for distributed simulation (i.e. dist-gem5)
57    parser.add_argument("--dist", action="store_true", help="Distributed gem5"\
58                      " simulation.")
59    parser.add_argument("--is-switch", action="store_true",
60                        help="Select the network switch simulator process for"\
61                      " a distributed gem5 run.")
62    parser.add_argument("--dist-rank", default=0, action="store", type=int,
63                      help="Rank of this system within the dist gem5 run.")
64    parser.add_argument("--dist-size", default=0, action="store", type=int,
65                      help="Number of gem5 processes within the dist gem5"\
66                      " run.")
67    parser.add_argument("--dist-server-name",
68                      default="127.0.0.1",
69                      action="store", type=str,
70                      help="Name of the message server host\nDEFAULT:"\
71                      " localhost")
72    parser.add_argument("--dist-server-port",
73                      default=2200,
74                      action="store", type=int,
75                      help="Message server listen port\nDEFAULT: 2200")
76    parser.add_argument("--dist-sync-repeat",
77                      default="0us",
78                      action="store", type=str,
79                      help="Repeat interval for synchronisation barriers"\
80                      " among dist-gem5 processes\nDEFAULT:"\
81                      " --ethernet-linkdelay")
82    parser.add_argument("--dist-sync-start",
83                      default="1000000000000t",
84                      action="store", type=str,
85                      help="Time to schedule the first dist synchronisation"\
86                      " barrier\nDEFAULT:1000000000000t")
87    parser.add_argument("--ethernet-linkspeed", default="10Gbps",
88                        action="store", type=str,
89                        help="Link speed in bps\nDEFAULT: 10Gbps")
90    parser.add_argument("--ethernet-linkdelay", default="10us",
91                      action="store", type=str,
92                      help="Link delay in seconds\nDEFAULT: 10us")
93    parser.add_argument("--etherdump", action="store", type=str, default="",
94                        help="Specify the filename to dump a pcap capture of"\
95                        " the ethernet traffic")
96    # Used by util/dist/gem5-dist.sh
97    parser.add_argument("--checkpoint-dir", type=str,
98                        default=m5.options.outdir,
99                        help="Directory to save/read checkpoints")
100
101
102def addEthernet(system, options):
103    # create NIC
104    dev = IGbE_e1000()
105    system.attach_pci(dev)
106    system.ethernet = dev
107
108    # create distributed ethernet link
109    system.etherlink = DistEtherLink(speed = options.ethernet_linkspeed,
110                                     delay = options.ethernet_linkdelay,
111                                     dist_rank = options.dist_rank,
112                                     dist_size = options.dist_size,
113                                     server_name = options.dist_server_name,
114                                     server_port = options.dist_server_port,
115                                     sync_start = options.dist_sync_start,
116                                     sync_repeat = options.dist_sync_repeat)
117    system.etherlink.int0 = Parent.system.ethernet.interface
118    if options.etherdump:
119        system.etherdump = EtherDump(file=options.etherdump)
120        system.etherlink.dump = system.etherdump
121
122
123def main():
124    parser = argparse.ArgumentParser(
125        description="Generic ARM big.LITTLE configuration with "\
126        "dist-gem5 support")
127    bL.addOptions(parser)
128    addOptions(parser)
129    options = parser.parse_args()
130
131    if options.is_switch:
132        root = Root(full_system = True,
133                    system = sw.build_switch(options))
134    else:
135        root = bL.build(options)
136        addEthernet(root.system, options)
137
138    bL.instantiate(options, checkpoint_dir=options.checkpoint_dir)
139    bL.run(options.checkpoint_dir)
140
141
142if __name__ == "__m5_main__":
143    main()
144