Initial commit of public repository open_pdks.
diff --git a/sky130/common_pdn.tcl b/sky130/common_pdn.tcl
new file mode 100644
index 0000000..9ad2264
--- /dev/null
+++ b/sky130/common_pdn.tcl
@@ -0,0 +1,44 @@
+# Power nets
+set ::power_nets "VDD"
+set ::ground_nets "VSS"
+
+set ::macro_blockage_layer_list "li1 met1 met2 met3 met4 met5"
+
+pdngen::specify_grid stdcell {
+ name grid
+ rails {
+ met1 {width 0.48 pitch $::env(PLACE_SITE_WIDTH) offset 0}
+ }
+ straps {
+ met4 {width 1.6 pitch $::env(FP_PDN_VPITCH) offset $::env(FP_PDN_VOFFSET)}
+ met5 {width 1.6 pitch $::env(FP_PDN_HPITCH) offset $::env(FP_PDN_HOFFSET)}
+ }
+ connect {{met1 met4} {met4 met5}}
+}
+
+pdngen::specify_grid macro {
+ orient {R0 R180 MX MY R90 R270 MXR90 MYR90}
+ power_pins "VDDE"
+ ground_pins "VSSE"
+ blockages "li1 met1 met2 met3 met4 met5"
+ straps {
+ }
+ connect { }
+}
+
+set ::halo 0
+
+# Metal layer for rails on every row
+set ::rails_mlayer "met1" ;
+
+# POWER or GROUND #Std. cell rails starting with power or ground rails at the bottom of the core area
+set ::rails_start_with "POWER" ;
+
+# POWER or GROUND #Upper metal stripes starting with power or ground rails at the left/bottom of the core area
+set ::stripes_start_with "POWER" ;
+
+proc generate_viarules {} {
+}
+
+cd $::env(TMP_DIR)/floorplan
+
