fuzzers: 038-cfg: Add always on bit for Zynq

Signed-off-by: Tomasz Michalak <[email protected]>

fuzzers/038-cfg/Makefile

@@ -5,6 +5,11 @@ database: build/segbits_cfg.rdb
 	${XRAY_DBFIXUP} --db-root build --zero-db bits.dbf \
                 --seg-fn-in build/segbits_cfg.rdb \
                 --seg-fn-out build/segbits_cfg.db
+# Some of the bits in Zynq seem to be always set
+# see https://github.com/SymbiFlow/prjxray/issues/746
+ifeq (${XRAY_DATABASE}, zynq7)
+	python3 add_constant_bits.py build/segbits_cfg.db
+endif
 
 
 build/segbits_cfg.rdb: $(SPECIMENS_OK)

fuzzers/038-cfg/add_constant_bits.py

@@ -0,0 +1,11 @@
+import sys
+
+constant_bits = {
+    "CFG_CENTER_MID.ALWAYS_ON_PROP1": "26_2206",
+    "CFG_CENTER_MID.ALWAYS_ON_PROP2": "26_2207",
+    "CFG_CENTER_MID.ALWAYS_ON_PROP3": "27_2205"
+}
+
+with open(sys.argv[1], "a") as f:
+    for bit_name, bit_value in constant_bits.items():
+        f.write(bit_name + " " + bit_value + "\n")