From: Sebastien Bourdeauducq <sebastien@milkymist.org>
Date: Mon, 30 Apr 2012 22:11:42 +0000 (-0500)
Subject: bus/asmibus/hub: hack to prevent comb loops
X-Git-Tag: 24jan2021_ls180~2099^2~948
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=f2c20e4af0266be64aada64d413845e48083b836;p=litex.git

bus/asmibus/hub: hack to prevent comb loops
---

diff --git a/migen/bus/asmibus.py b/migen/bus/asmibus.py
index ec34a6f5..4bae4ef7 100644
--- a/migen/bus/asmibus.py
+++ b/migen/bus/asmibus.py
@@ -102,10 +102,11 @@ class Port:
 		choose_slot = None
 		for s in reversed(self.slots):
 			choose_slot = If(s.state == SLOT_EMPTY,
-				self.ack.eq(1),
 				s.allocate.eq(self.stb)
 			).Else(choose_slot)
 		comb.append(choose_slot)
+		comb.append(self.ack.eq(optree("|", 
+			[s.state == SLOT_EMPTY for s in self.slots])))
 		
 		# call
 		comb += [s.call.eq(self.get_call_expression(n))