ol2/tt_top: Specify out own Synth/DRC exclude list

Among other thing the PDK provided one exclude the buf_16 variant
which we will need to reference during static timing analysis ...

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>

ol2/tt_top/build.py

@@ -151,6 +151,12 @@ class TopFlow(SequentialFlow):
 		"EXTRA_VERILOG_MODELS": macros_models,
 		"MACROS": macros,
 
+		# Synthesis
+		"SYNTH_ELABORATE_ONLY"      : True,
+		"SYNTH_EXCLUSION_CELL_LIST" : "no_synth_cells.txt",
+		"PNR_EXCLUSION_CELL_LIST"   : "no_drc_cells.txt",
+		"DRC_EXCLUDE_CELL_LIST"     : "no_drc_cells.txt",
+
 		# PDN
 		"PDN_CFG": "pdn.tcl",
 

ol2/tt_top/config.json

@@ -38,7 +38,6 @@
     "FP_PDN_HOFFSET": "expr::$FP_PDN_VOFFSET",
     "RT_MAX_LAYER": "met4",
     "FP_PDN_CHECK_NODES": false,
-    "SYNTH_ELABORATE_ONLY": true,
     "FP_PDN_ENABLE_RAILS": false,
     "DIODE_INSERTION_STRATEGY": false,
     "MAGIC_DEF_LABELS": false,

ol2/tt_top/no_drc_cells.txt

@@ -0,0 +1,52 @@
+sky130_fd_sc_hd__a2111oi_0
+sky130_fd_sc_hd__a21boi_0
+sky130_fd_sc_hd__and2_0
+sky130_fd_sc_hd__clkdlybuf4s15_1
+sky130_fd_sc_hd__clkdlybuf4s18_1
+sky130_fd_sc_hd__fa_4
+sky130_fd_sc_hd__lpflow_bleeder_1
+sky130_fd_sc_hd__lpflow_clkbufkapwr_1
+sky130_fd_sc_hd__lpflow_clkbufkapwr_16
+sky130_fd_sc_hd__lpflow_clkbufkapwr_2
+sky130_fd_sc_hd__lpflow_clkbufkapwr_4
+sky130_fd_sc_hd__lpflow_clkbufkapwr_8
+sky130_fd_sc_hd__lpflow_clkinvkapwr_1
+sky130_fd_sc_hd__lpflow_clkinvkapwr_16
+sky130_fd_sc_hd__lpflow_clkinvkapwr_2
+sky130_fd_sc_hd__lpflow_clkinvkapwr_4
+sky130_fd_sc_hd__lpflow_clkinvkapwr_8
+sky130_fd_sc_hd__lpflow_decapkapwr_12
+sky130_fd_sc_hd__lpflow_decapkapwr_3
+sky130_fd_sc_hd__lpflow_decapkapwr_4
+sky130_fd_sc_hd__lpflow_decapkapwr_6
+sky130_fd_sc_hd__lpflow_decapkapwr_8
+sky130_fd_sc_hd__lpflow_inputiso0n_1
+sky130_fd_sc_hd__lpflow_inputiso0p_1
+sky130_fd_sc_hd__lpflow_inputiso1n_1
+sky130_fd_sc_hd__lpflow_inputiso1p_1
+sky130_fd_sc_hd__lpflow_inputisolatch_1
+sky130_fd_sc_hd__lpflow_isobufsrc_1
+sky130_fd_sc_hd__lpflow_isobufsrc_16
+sky130_fd_sc_hd__lpflow_isobufsrc_2
+sky130_fd_sc_hd__lpflow_isobufsrc_4
+sky130_fd_sc_hd__lpflow_isobufsrc_8
+sky130_fd_sc_hd__lpflow_isobufsrckapwr_16
+sky130_fd_sc_hd__lpflow_lsbuf_lh_hl_isowell_tap_1
+sky130_fd_sc_hd__lpflow_lsbuf_lh_hl_isowell_tap_2
+sky130_fd_sc_hd__lpflow_lsbuf_lh_hl_isowell_tap_4
+sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_4
+sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_tap_1
+sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_tap_2
+sky130_fd_sc_hd__lpflow_lsbuf_lh_isowell_tap_4
+sky130_fd_sc_hd__mux4_4
+sky130_fd_sc_hd__o21ai_0
+sky130_fd_sc_hd__o311ai_0
+sky130_fd_sc_hd__or2_0
+sky130_fd_sc_hd__probe_p_8
+sky130_fd_sc_hd__probec_p_8
+sky130_fd_sc_hd__xor3_1
+sky130_fd_sc_hd__xor3_2
+sky130_fd_sc_hd__xor3_4
+sky130_fd_sc_hd__xnor3_1
+sky130_fd_sc_hd__xnor3_2
+sky130_fd_sc_hd__xnor3_4