sky130hd/uW: use non-default configs for GRT

Signed-off-by: Arthur Koucher <[email protected]>

Author: AcKoucher

flow/designs/sky130hd/microwatt/config.mk

@@ -33,6 +33,9 @@ export SKIP_GATE_CLONING = 1
 
 export SETUP_SLACK_MARGIN = 0.2
 
+# GRT non-default config
+export FASTROUTE_TCL = $(DESIGN_HOME)/$(PLATFORM)/$(DESIGN_NICKNAME)/fastroute.tcl
+
 # This is high, some SRAMs should probably be converted
 # to real SRAMs and not instantiated as flops
 export SYNTH_MEMORY_MAX_BITS ?= 42000

flow/designs/sky130hd/microwatt/fastroute.tcl

@@ -0,0 +1,5 @@
+set_global_routing_layer_adjustment $::env(MIN_ROUTING_LAYER)-$::env(MAX_ROUTING_LAYER) 0.15
+
+set_routing_layers -clock $::env(MIN_CLK_ROUTING_LAYER)-$::env(MAX_ROUTING_LAYER)
+set_routing_layers -signal $::env(MIN_ROUTING_LAYER)-$::env(MAX_ROUTING_LAYER)
+