src/dev/x86/I8259.py

# Copyright (c) 2008 The Regents of The University of Michigan
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# Authors: Gabe Black

from m5.params import *
from m5.proxy import *
from Device import BasicPioDevice
from X86IntPin import X86IntSourcePin, X86IntSinkPin

class X86I8259CascadeMode(Enum):
    map = {'I8259Master' : 0,
           'I8259Slave' : 1,
           'I8259Single' : 2
    }

class I8259(BasicPioDevice):
    type = 'I8259'
    cxx_class='X86ISA::I8259'
    pio_latency = Param.Latency('1ns', "Programmed IO latency in simticks")
    output = Param.X86IntSourcePin(X86IntSourcePin(),
            'The pin this I8259 drives')
    mode = Param.X86I8259CascadeMode('How this I8259 is cascaded')
    slave = Param.I8259(NULL, 'Slave I8259, if any')

    def pin(self, line):
        return X86IntSinkPin(device=self, number=line)