wishbone/Cache: avoid REFILL_WRTAG state to improve speed.

enjoy-digital · Jan 10, 2020 · fa22d6a · fa22d6a
1 parent f408527
commit fa22d6a
Showing 1 changed file with 8 additions and 8 deletions.
diff --git a/litex/soc/interconnect/wishbone.py b/litex/soc/interconnect/wishbone.py
@@ -606,7 +606,10 @@ def word_is_last(word):
                 If(tag_do.dirty,
                     NextState("EVICT")
                 ).Else(
-                    NextState("REFILL_WRTAG")
+                    # Write the tag first to set the slave address
+                    tag_port.we.eq(1),
+                    word_clr.eq(1),
+                    NextState("REFILL")
                 )
             )
         )
@@ -618,16 +621,13 @@ def word_is_last(word):
             If(slave.ack,
                 word_inc.eq(1),
                  If(word_is_last(word),
-                    NextState("REFILL_WRTAG")
+                    # Write the tag first to set the slave address
+                    tag_port.we.eq(1),
+                    word_clr.eq(1),
+                    NextState("REFILL")
                 )
             )
         )
-        fsm.act("REFILL_WRTAG",
-            # Write the tag first to set the slave address
-            tag_port.we.eq(1),
-            word_clr.eq(1),
-            NextState("REFILL")
-        )
         fsm.act("REFILL",
             slave.stb.eq(1),
             slave.cyc.eq(1),