pdk: consolidate public collateral

Author: phsauter

.gitignore

@@ -14,6 +14,8 @@
 /.setPDK.csh
 # public PDK mirror
 /ihp13/pdk/gds/*.gds
+!/ihp13/pdk/gds/bondpad_70x70.gds
+!/ihp13/pdk/gds/bondpad5l_70x70.gds
 /ihp13/pdk/verilog/sg13g2_stdcell_verilator.v
 # dfii
 /dfii/

README.md

@@ -177,18 +177,18 @@ On ETH systems, `technology/` is normally created by the ETHZ Design Center
 cockpit and takes priority. Outside ETH, `env.sh` creates `technology ->
 ihp13/pdk` on demand if `technology/` does not already exist. The committed
 `ihp13/pdk` mirror contains the Apache-2.0 Liberty, LEF, and Verilog files
-needed by the flow. GDS files are kept out of git and can be downloaded into
-`ihp13/pdk/gds` with:
+needed by the flow. The two Croc bondpad GDS files are committed in
+`ihp13/pdk/gds`; IHP GDS files are kept out of git and can be downloaded with:
 
 ```sh
 scripts/download_pdk_gds.sh
 ```
 
 You can also run `scripts/setup_technology.sh` manually to print the active
 technology view. `env.sh` runs the same setup quietly before the ASIC scripts
-use the PDK. The setup script never mixes the two sources: if `technology/`
-already exists, it leaves the directory unchanged; otherwise it is a symlink
-to the public mirror.
+use the PDK. If `technology/` already exists, setup leaves it unchanged;
+Cockpit may link shared Croc-managed collateral from `ihp13/pdk`. Otherwise,
+`technology/` is a symlink to the public mirror.
 
 KLayout needs technology scripts, filling rules, and layer properties in
 addition to the digital collateral above. Those tool-support files remain in

env.sh

@@ -62,7 +62,8 @@ fi
 # `technology/` is the single active view for the digital PDK collateral:
 # Liberty, LEF, Verilog models, and GDS. ETH cockpit users normally get this
 # directory from cockpit. External users get an on-demand symlink to the
-# committed public mirror in ihp13/pdk. The views are never mixed.
+# committed public mirror in ihp13/pdk. Cockpit takes priority and may link
+# shared Croc-managed collateral from the public mirror.
 
 PUBLIC_PDK_ROOT="$CROC_ROOT/ihp13/pdk"
 if ! "$CROC_ROOT/scripts/setup_technology.sh" --quiet; then