nangate45/bp_be_top: tweak the grt derates to resolve congestion

maliberty · maliberty · commit 1b2a6e821582 · 2025-03-23T14:58:12.000Z
Signed-off-by: Matt Liberty &lt;mliberty@precisioninno.com&gt;
diff --git a/flow/designs/nangate45/bp_be_top/config.mk b/flow/designs/nangate45/bp_be_top/config.mk
@@ -30,3 +30,7 @@ export MACRO_PLACE_HALO = 10 10
 
 export PLACE_DENSITY_LB_ADDON = 0.10
 export TNS_END_PERCENT        = 100
+
+export SYNTH_MINIMUM_KEEP_SIZE = 3000
+
+export FASTROUTE_TCL = $(DESIGN_HOME)/$(PLATFORM)/$(DESIGN_NAME)/fastroute.tcl
diff --git a/flow/designs/nangate45/bp_be_top/fastroute.tcl b/flow/designs/nangate45/bp_be_top/fastroute.tcl
@@ -0,0 +1,4 @@
+set_global_routing_layer_adjustment metal2-metal3 0.4
+set_global_routing_layer_adjustment metal4-$::env(MAX_ROUTING_LAYER) 0.15
+
+set_routing_layers -signal $::env(MIN_ROUTING_LAYER)-$::env(MAX_ROUTING_LAYER)
