asap7/ethmac_lvt: study placement densities and grt

util: bazel plot_congestion

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

flow/designs/asap7/ethmac_lvt/BUILD.bazel

@@ -0,0 +1,59 @@
+load("@bazel-orfs//:sweep.bzl", "orfs_sweep")
+load("//util:plot_congestion.bzl", "plot_congestion")
+
+# Format densities, rounding to 2 decimal places.
+SWEEPS = {
+    "PLACE_DENSITY": [str(0.60 + x * 0.01 + 0.005)[:4] for x in range(20)],
+    "CORE_UTILIZATION": [str(40 + x * 5) for x in range(4)],
+}
+
+SWEEP = "PLACE_DENSITY"
+
+orfs_sweep(
+    name = "ethmac_lvt",
+    arguments = {
+        # Faster builds
+        "SKIP_INCREMENTAL_REPAIR": "1",
+        "GPL_TIMING_DRIVEN": "0",
+        # Various
+        "SDC_FILE": "$(location :constraint.sdc)",
+        "ABC_AREA": "1",
+        "CORE_UTILIZATION": "40",
+        "CORE_ASPECT_RATIO": "1",
+        "CORE_MARGIN": "2",
+        "PLACE_DENSITY": "0.60",
+        "ASAP7_USELVT": "1",
+        "RECOVER_POWER": "1",
+        "ADDITIONAL_LIBS": "$(LIB_DIR)/asap7sc7p5t_AO_RVT_FF_nldm_211120.lib.gz \
+                                $(LIB_DIR)/asap7sc7p5t_INVBUF_RVT_FF_nldm_220122.lib.gz \
+			        $(LIB_DIR)/asap7sc7p5t_OA_RVT_FF_nldm_211120.lib.gz \
+			        $(LIB_DIR)/asap7sc7p5t_SIMPLE_RVT_FF_nldm_211120.lib.gz \
+			        $(LIB_DIR)/asap7sc7p5t_SEQ_RVT_FF_nldm_220123.lib",
+        "ADDITIONAL_GDS": "$(PLATFORM_DIR)/gds/asap7sc7p5t_28_R_220121a.gds",
+        "ADDITIONAL_LEFS": "$(PLATFORM_DIR)/lef/asap7sc7p5t_28_R_1x_220121a.lef",
+    },
+    other_variants = {"base": {}},
+    sources = {
+        "SDC_FILE": [":constraint.sdc"],
+    },
+    sweep = {
+        value: {
+            "arguments": {
+                SWEEP: value,
+            },
+            "previous_stage": {
+                "floorplan": "ethmac_lvt_synth",
+            },
+        }
+        for value in SWEEPS[SWEEP]
+    },
+    top = "ethmac",
+    verilog_files = ["//:ethmac_lvt_src"],
+)
+
+plot_congestion(
+    name = "plot",
+    srcs = [":ethmac_lvt_{value}_grt".format(value = value) for value in SWEEPS[SWEEP]],
+    argument = SWEEP,
+    values = SWEEPS[SWEEP],
+)