litex/migen/flow/hooks.py

43 lines
902 B
Python

from collections import defaultdict
from migen.fhdl.std import *
from migen.flow.actor import *
class EndpointSimHook(Module):
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, selfp):
if selfp.endpoint.stb:
if selfp.endpoint.ack:
self.on_ack()
else:
self.on_nack()
else:
self.on_inactive()
class DFGHook(Module):
def __init__(self, dfg, create):
assert(not dfg.is_abstract())
self.nodepair_to_ep = defaultdict(dict)
for hookn, (u, v, data) in enumerate(dfg.edges_iter(data=True)):
ep_to_hook = self.nodepair_to_ep[(u, v)]
ep = data["source"]
h = create(u, ep, v)
ep_to_hook[ep] = h
setattr(self.submodules, "hook"+str(hookn), h)
def hooks_iter(self):
for v1 in self.nodepair_to_ep.values():
for v2 in v1.values():
yield v2