sram-64x16: OBS covering the block in M4 layer

Signed-off-by: Øyvind Harboe <[email protected]>

Author: oharboe

flow/designs/asap7/sram-64x16/config.mk

@@ -30,7 +30,7 @@ export PLACE_DENSITY          = 0.65
 export SYNTH_HIERARCHICAL = 1
 export RTLMP_FLOW = True
 
-export DETAILED_ROUTE_ARGS=-bottom_routing_layer M2 -top_routing_layer M7 -save_guide_updates -verbose 1 -droute_end_iter 5
+export DETAILED_ROUTE_ARGS=-bottom_routing_layer M2 -top_routing_layer M7 -save_guide_updates -verbose 1 -drc_report_iter_step 5 -droute_end_iter 30
 
 export MACRO_HALO_X            = 3
 export MACRO_HALO_Y            = 3

flow/designs/asap7/sram-64x16/lef/SRAM2RW16x32_x4.lef

@@ -1218,6 +1218,8 @@ MACRO SRAM2RW16x32
       RECT 4.0 0.0 18.864 34.656 ;
     LAYER M3 ;
       RECT 4.0 0.0 18.864 34.656 ;
+    LAYER M4 ;
+      RECT 4.0 0.0 18.864 34.656 ;
   END 
 END SRAM2RW16x32