2974dc7a37
Swig wrappers for native objects currently share the _m5.internal name space with Python code. This is undesirable if we ever want to switch from Swig to some other framework for native binding (e.g., PyBind11 or Boost::Python). This changeset moves all of such wrappers to the _m5 namespace, which is now reserved for native code. Change-Id: I2d2bc12dbc05b57b7c5a75f072e08124413d77f3 Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Curtis Dunham <curtis.dunham@arm.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
91 lines
3.4 KiB
Python
91 lines
3.4 KiB
Python
# Copyright (c) 2007 The Regents of The University of Michigan
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met: redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer;
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# redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution;
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# neither the name of the copyright holders nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# Authors: Nathan Binkert
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import sys
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from m5.util import warn
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tps = 1.0e12 # default to 1 THz (1 Tick == 1 ps)
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tps_fixed = False # once set to true, can't be changed
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# fix the global frequency and tell C++ about it
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def fixGlobalFrequency():
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import _m5.core
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global tps, tps_fixed
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if not tps_fixed:
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tps_fixed = True
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_m5.core.setClockFrequency(int(tps))
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print "Global frequency set at %d ticks per second" % int(tps)
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def setGlobalFrequency(ticksPerSecond):
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from m5.util import convert
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global tps, tps_fixed
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if tps_fixed:
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raise AttributeError, \
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"Global frequency already fixed at %f ticks/s." % tps
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if isinstance(ticksPerSecond, (int, long)):
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tps = ticksPerSecond
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elif isinstance(ticksPerSecond, float):
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tps = ticksPerSecond
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elif isinstance(ticksPerSecond, str):
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tps = round(convert.anyToFrequency(ticksPerSecond))
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else:
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raise TypeError, \
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"wrong type '%s' for ticksPerSecond" % type(ticksPerSecond)
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# how big does a rounding error need to be before we warn about it?
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frequency_tolerance = 0.001 # 0.1%
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def fromSeconds(value):
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if not isinstance(value, float):
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raise TypeError, "can't convert '%s' to type tick" % type(value)
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# once someone needs to convert to seconds, the global frequency
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# had better be fixed
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if not tps_fixed:
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raise AttributeError, \
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"In order to do conversions, the global frequency must be fixed"
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if value == 0:
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return 0
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# convert the value from time to ticks
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value *= tps
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int_value = int(round(value))
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err = (value - int_value) / value
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if err > frequency_tolerance:
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warn("rounding error > tolerance\n %f rounded to %d", value,
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int_value)
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return int_value
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__all__ = [ 'setGlobalFrequency', 'fixGlobalFrequency', 'fromSeconds',
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'frequency_tolerance' ]
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