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# Authors: Matthias Jung

import m5
from m5.objects import *

# This configuration shows a simple setup of a TrafficGen (CPU) and an
# external TLM port for SystemC co-simulation
#
# Base System Architecture:
# +-------------+  +-----+    ^
# | System Port |  | CPU |    |
# +-------+-----+  +--+--+    |
#         |           |       | gem5 World
#         |      +----+       | (see this file)
#         |      |            |
# +-------v------v-------+    |
# |        Membus        |    v
# +----------------+-----+    External Port (see sc_slave_port.*)
#                  |          ^
#              +---v---+      | TLM World
#              |  TLM  |      | (see sc_target.*)
#              +-------+      v
#

# Create a system with a Crossbar and a TrafficGenerator as CPU:
system = System()
system.membus = IOXBar(width = 16)
system.physmem = SimpleMemory() # This must be instanciated, even if not needed
system.cpu = TrafficGen(config_file = "tgen.cfg")
system.clk_domain = SrcClockDomain(clock = '1.5GHz',
    voltage_domain = VoltageDomain(voltage = '1V'))

# Create a external TLM port:
system.tlm = ExternalSlave()
system.tlm.addr_ranges = [AddrRange('512MB')]
system.tlm.port_type = "tlm_slave"
system.tlm.port_data = "transactor"

# Route the connections:
system.cpu.port = system.membus.slave
system.system_port = system.membus.slave
system.membus.master = system.tlm.port

# Start the simulation:
root = Root(full_system = False, system = system)
root.system.mem_mode = 'timing'
m5.instantiate()
m5.simulate() #Simulation time specified later on commandline