e15de155460b5c41634c52c521a032595d8e5472
1 # Copyright (c) 2005-2007 The Regents of The University of Michigan
2 # Copyright (c) 2010 Advanced Micro Devices, Inc.
5 # Redistribution and use in source and binary forms, with or without
6 # modification, are permitted provided that the following conditions are
7 # met: redistributions of source code must retain the above copyright
8 # notice, this list of conditions and the following disclaimer;
9 # redistributions in binary form must reproduce the above copyright
10 # notice, this list of conditions and the following disclaimer in the
11 # documentation and/or other materials provided with the distribution;
12 # neither the name of the copyright holders nor the names of its
13 # contributors may be used to endorse or promote products derived from
14 # this software without specific prior written permission.
16 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 # Authors: Nathan Binkert
30 from m5
.SimObject
import SimObject
31 from m5
.params
import *
32 from m5
.util
import fatal
34 class Root(SimObject
):
38 def __new__(cls
, **kwargs
):
39 if Root
._the
_instance
:
40 fatal("Attempt to allocate multiple instances of Root.")
43 # first call: allocate the unique instance
45 # If SimObject ever implements __new__, we may want to pass
46 # kwargs here, but for now this goes straight to
47 # object.__new__ which prints an ugly warning if you pass it
48 # args. Seems like a bad design but that's the way it is.
49 Root
._the
_instance
= SimObject
.__new
__(cls
)
50 return Root
._the
_instance
54 return Root
._the
_instance
61 # Time syncing prevents the simulation from running faster than real time.
62 time_sync_enable
= Param
.Bool(False, "whether time syncing is enabled")
63 time_sync_period
= Param
.Clock("100ms", "how often to sync with real time")
64 time_sync_spin_threshold
= \
65 Param
.Clock("100us", "when less than this much time is left, spin")