Added a full fill generation script which breaks a design up into
tiles for faster, more memory-efficient processing. This includes
some changes to the techfile to create two variants for the fill
patterning, one that should be used for a full-chip pattern, and
one to be used with the script. Also removed the patch file from
yesterday's commit.
diff --git a/sky130/magic/sky130.tech b/sky130/magic/sky130.tech
index 95fc2f4..67047b2 100644
--- a/sky130/magic/sky130.tech
+++ b/sky130/magic/sky130.tech
@@ -1707,7 +1707,7 @@
#endif (EXPERIMENTAL)
#----------------------------------------------------------------
-style wafflefill
+style wafflefill variants (),(tiled)
#----------------------------------------------------------------
# Style used by scripts for automatically generating fill layers
# NOTE: Be sure to generate output on flattened layout.
@@ -1717,10 +1717,30 @@
gridlimit 5
#----------------------------------------------------------------
-# Generate and retain a layer representing the bounding box
+# Generate and retain a layer representing the bounding box.
+#
+# For variant ():
+# The bounding box is the full extent of geometry on the top level
+# cell.
+#
+# For variant (tiled):
+# Use with a script that breaks layout into flattened tiles and runs
+# fill individually on each. The tiles should be larger than the
+# step size, and each should draw a layer "comment" the size of the
+# step box.
#----------------------------------------------------------------
- templayer topbox
- bbox top
+
+ variants ()
+ templayer topbox
+ bbox top
+
+ variants (tiled)
+ templayer topbox comment
+ # Each tile imposes the full keepout distance rule of
+ # 3um on all sides.
+ shrink 1500
+
+ variants *
#----------------------------------------------------------------
# Generate guard-band around nwells to keep FOM from crossing
@@ -1732,25 +1752,27 @@
templayer mvnwell
bloat-all alldiffmv nwell
- templayer lvnwell nwell
+ templayer lvnwell allnwell
and-not mvnwell
templayer well_shrink mvnwell
shrink 250
or lvnwell
shrink 180
- templayer well_guardband nwell
+ templayer well_guardband allnwell
grow 340
and-not well_shrink
#---------------------------------------------------
# Diffusion and poly keep-out areas
#---------------------------------------------------
- templayer obstruct_fom alldiff,allpoly,rpw
+ templayer obstruct_fom alldiff,allpoly,fomfill,polyfill,obspoly,obsactive
+ or rpw,pnp,npn
grow 500
or well_guardband
- templayer obstruct_poly alldiff,allpoly,rpw
+ templayer obstruct_poly alldiff,allpolyfomfill,polyfill,obspoly,obsactive
+ or rpw,pnp,npn
grow 1000
#---------------------------------------------------
@@ -2045,6 +2067,7 @@
templayer met4fill_medium topbox
slots 0 1000 300 0 1000 300 700 1050
and-not obstruct_m4_medium
+ and topbox
shrink 495
grow 495
