50 lines
2.2 KiB
Python
50 lines
2.2 KiB
Python
# Copyright (c) 2008 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: Gabe Black
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from m5.params import *
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from m5.proxy import *
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from Device import BasicPioDevice
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from X86IntPin import X86IntSourcePin, X86IntSinkPin
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class X86I8259CascadeMode(Enum):
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map = {'I8259Master' : 0,
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'I8259Slave' : 1,
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'I8259Single' : 2
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}
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class I8259(BasicPioDevice):
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type = 'I8259'
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cxx_class='X86ISA::I8259'
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pio_latency = Param.Latency('1ns', "Programmed IO latency in simticks")
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output = Param.X86IntSourcePin(X86IntSourcePin(),
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'The pin this I8259 drives')
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mode = Param.X86I8259CascadeMode('How this I8259 is cascaded')
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slave = Param.I8259(NULL, 'Slave I8259, if any')
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def pin(self, line):
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return X86IntSinkPin(device=self, number=line)
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