51 lines
1.6 KiB
Python
51 lines
1.6 KiB
Python
from migen.fhdl.structure import *
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from migen.flow.actor import *
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from migen.corelogic.record import *
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from migen.corelogic.misc import optree
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class Buffer(Actor):
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def __init__(self, layout):
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Actor.__init__(self,
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SchedulingModel(SchedulingModel.PIPELINE, 1),
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("d", Sink, layout), ("q", Source, layout))
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def get_process_fragment(self):
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sigs_d = self.token("d").flatten()
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sigs_q = self.token("q").flatten()
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sync = [If(self.pipe_ce, Cat(*sigs_q).eq(Cat(*sigs_d)))]
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return Fragment(sync=sync)
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class Combinator(Actor):
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def __init__(self, layout, *subrecords):
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source = Record(layout)
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subrecords = [source.subrecord(*subr) for subr in subrecords]
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eps = [("sink{0}".format(n), Sink, r)
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for x in enumerate(subrecords)]
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ep_source = ("source", Source, source)
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eps.append(ep_source)
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Actor.__init__(self,
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SchedulingModel(SchedulingModel.COMBINATORIAL),
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*eps)
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def get_fragment(self):
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source = self.endpoints["source"]
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sinks = [self.endpoints["sink{0}".format(n)]
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for n in range(len(self.endpoints)-1)]
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comb = [source.stb.eq(optree('&', [sink.stb for sink in sinks]))]
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comb += [sink.ack.eq(source.ack & source.stb) for sink in sinks]
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return Fragment(comb)
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class Splitter(Actor):
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def __init__(self, layout, *subrecords):
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sink = Record(layout)
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subrecords = [sink.subrecord(*subr) for subr in subrecords]
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eps = [("source{0}".format(n), Source, r)
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for n, r in enumerate(subrecords)]
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ep_sink = ("sink", Sink, sink)
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eps.append(ep_sink)
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Actor.__init__(self,
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SchedulingModel(SchedulingModel.COMBINATORIAL),
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*eps)
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# TODO def get_fragment(self):
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