detail route: keep some vars that are used in private CIs

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

Author: oharboe

docs/user/FlowVariables.md

@@ -151,6 +151,7 @@ Note:
 | `CELL_PAD_IN_SITES_DETAIL_PLACEMENT` | Cell padding on both sides in site widths to ease routability in detail placement.			                                       |
 | `PLACE_DENSITY`                      | The desired placement density of cells. It reflects how spread the cells would be on the core area. 1.0 = closely dense. 0.0 = widely spread. |
 | `PLACE_DENSITY_LB_ADDON`             | Check the lower boundary of the PLACE_DENSITY and add PLACE_DENSITY_LB_ADDON if it exists.                                                    |
+| `REPAIR_PDN_VIA_LAYER`               | Remove power grid vias which generate DRC violations after detailed routing.                                                                  |
 | `GLOBAL_PLACEMENT_ARGS`              | Use additional tuning parameters during global placement other than default args defined in gloabl_place.tcl.                                 |
 | `ENABLE_DPO`                         | Enable detail placement with improve_placement feature.                                                                                       |
 | `DPO_MAX_DISPLACEMENT`               | Specifies how far an instance can be moved when optimizing.                                                                                   |

flow/scripts/detail_route.tcl

@@ -11,6 +11,9 @@ set_propagated_clock [all_clocks]
 set_thread_count $::env(NUM_CORES)
 
 set additional_args ""
+if { [info exists ::env(dbProcessNode)]} {
+  append additional_args " -db_process_node $::env(dbProcessNode)"
+}
 if { [info exists ::env(OR_SEED)]} {
   append additional_args " -or_seed $::env(OR_SEED)"
 }
@@ -33,6 +36,9 @@ if { [info exists ::env(VIA_IN_PIN_MAX_LAYER)]} {
 if { [info exists ::env(DISABLE_VIA_GEN)]} {
   append additional_args " -disable_via_gen"
 }
+if { [info exists ::env(REPAIR_PDN_VIA_LAYER)]} {
+  append additional_args " -repair_pdn_vias $::env(REPAIR_PDN_VIA_LAYER)"
+}
 
 append additional_args " -save_guide_updates -verbose 1"