1 # Copyright (c) 2005-2007 The Regents of The University of Michigan
2 # Copyright (c) 2010-2013 Advanced Micro Devices, Inc.
3 # Copyright (c) 2013 Mark D. Hill and David A. Wood
6 # Redistribution and use in source and binary forms, with or without
7 # modification, are permitted provided that the following conditions are
8 # met: redistributions of source code must retain the above copyright
9 # notice, this list of conditions and the following disclaimer;
10 # redistributions in binary form must reproduce the above copyright
11 # notice, this list of conditions and the following disclaimer in the
12 # documentation and/or other materials provided with the distribution;
13 # neither the name of the copyright holders nor the names of its
14 # contributors may be used to endorse or promote products derived from
15 # this software without specific prior written permission.
17 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 from m5
.SimObject
import SimObject
30 from m5
.params
import *
31 from m5
.util
import fatal
33 class Root(SimObject
):
37 def __new__(cls
, **kwargs
):
38 if Root
._the
_instance
:
39 fatal("Attempt to allocate multiple instances of Root.")
42 # first call: allocate the unique instance
44 # If SimObject ever implements __new__, we may want to pass
45 # kwargs here, but for now this goes straight to
46 # object.__new__ which prints an ugly warning if you pass it
47 # args. Seems like a bad design but that's the way it is.
48 Root
._the
_instance
= SimObject
.__new
__(cls
)
49 return Root
._the
_instance
53 return Root
._the
_instance
59 cxx_header
= "sim/root.hh"
61 # By default, root sim object and hence all other sim objects schedule
62 # event on the eventq with index 0.
65 # Simulation Quantum for multiple main event queue simulation.
66 # Needs to be set explicitly for a multi-eventq simulation.
67 sim_quantum
= Param
.Tick(0, "simulation quantum")
69 full_system
= Param
.Bool("if this is a full system simulation")
71 # Time syncing prevents the simulation from running faster than real time.
72 time_sync_enable
= Param
.Bool(False, "whether time syncing is enabled")
73 time_sync_period
= Param
.Clock("100ms", "how often to sync with real time")
74 time_sync_spin_threshold
= \
75 Param
.Clock("100us", "when less than this much time is left, spin")