wishbone.Arbiter: don't let one master starve others.

whitequark · whitequark · commit 5a60714cbd39 · 2017-03-06T13:19:35.000Z
diff --git a/misoc/interconnect/wishbone.py b/misoc/interconnect/wishbone.py
@@ -89,7 +89,7 @@ def __init__(self, masters, target):
                         self.comb += dest.eq(source)
 
         # connect bus requests to round-robin selector
-        reqs = [m.cyc for m in masters]
+        reqs = [m.cyc & ~m.ack for m in masters]
         self.comb += self.rr.request.eq(Cat(*reqs))
 
 
