bus/lasmibus/Crossbar: support cba_shift=0

m-labs · Jun 11, 2013 · 1ec1fb9 · 1ec1fb9
1 parent fe54c68
commit 1ec1fb9
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/migen/bus/lasmibus.py b/migen/bus/lasmibus.py
@@ -133,7 +133,10 @@ def _split_master_addresses(self, controller_bits, bank_bits, rca_bits, cba_shif
 			cba_upper = cba_shift + controller_bits + bank_bits
 			self.comb += cba.eq(master.adr[cba_shift:cba_upper])
 			if cba_shift < rca_bits:
-				self.comb += rca.eq(Cat(master.adr[:cba_shift], master.adr[cba_upper:]))
+				if cba_shift:
+					self.comb += rca.eq(Cat(master.adr[:cba_shift], master.adr[cba_upper:]))
+				else:
+					self.comb += rca.eq(master.adr[cba_upper:])
 			else:
 				self.comb += rca.eq(master.adr[:cba_shift])