From 6cf38bfcbac424a7d50cba253cc646d442e210d1 Mon Sep 17 00:00:00 2001 From: Sebastien Bourdeauducq Date: Fri, 6 Jul 2012 23:36:10 +0200 Subject: [PATCH] flow: hooks --- migen/flow/hooks.py | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 migen/flow/hooks.py diff --git a/migen/flow/hooks.py b/migen/flow/hooks.py new file mode 100644 index 00000000..1afa1868 --- /dev/null +++ b/migen/flow/hooks.py @@ -0,0 +1,45 @@ +from migen.fhdl.structure import * +from migen.flow.actor import * +from migen.sim.generic import PureSimulable + +class EndpointHook(PureSimulable): + def __init__(self, endpoint): + self.endpoint = endpoint + + def on_ack(self): + pass + + def on_nack(self): + pass + + def on_inactive(self): + pass + + def do_simulation(self, s): + if s.rd(self.endpoint.stb): + if s.rd(self.endpoint.ack): + self.on_ack() + else: + self.on_nack() + else: + self.on_inactive() + +class DFGHook: + def __init__(self, dfg, create): + assert(not dfg.is_abstract()) + self.nodepair_to_ep = dict() + for u, v, data in dfg.edges_iter(data=True): + if (u, v) in self.nodepair_to_ep: + ep_to_hook = self.nodepair_to_ep[(u, v)] + else: + ep_to_hook = dict() + self.nodepair_to_ep[(u, v)] = ep_to_hook + ep = data["source"] + ep_to_hook[ep] = create(u, ep, v) + + def get_fragment(self): + frag = Fragment() + for v1 in self.nodepair_to_ep.values(): + for v2 in v1.values(): + frag += v2.get_fragment() + return frag -- 2.30.2