diff --git a/machxo2/arch.cc b/machxo2/arch.cc
index 55d3a845..a69f97cb 100644
--- a/machxo2/arch.cc
+++ b/machxo2/arch.cc
@@ -626,4 +626,13 @@ std::vector<std::pair<IdString, std::string>> Arch::getWireAttrs(WireId wire) co
     return ret;
 }
 
+// -----------------------------------------------------------------------
+bool Arch::is_spine_row(int row) const
+{
+    for (auto &spine : chip_info->spines) {
+        if (row==spine.row) return true;
+    }
+    return false;
+}
+
 NEXTPNR_NAMESPACE_END
diff --git a/machxo2/arch.h b/machxo2/arch.h
index e7614582..1ef91ebc 100644
--- a/machxo2/arch.h
+++ b/machxo2/arch.h
@@ -133,6 +133,8 @@ NPNR_PACKED_STRUCT(struct VariantInfoPOD {
     RelSlice<SuffixeSupportedPOD> suffixes;
 });
 
+NPNR_PACKED_STRUCT(struct SpineInfoPOD { int32_t row; });
+
 NPNR_PACKED_STRUCT(struct ChipInfoPOD {
     RelPtr<char> family;
     RelPtr<char> device_name;
@@ -145,6 +147,7 @@ NPNR_PACKED_STRUCT(struct ChipInfoPOD {
     RelSlice<PIOInfoPOD> pio_info;
     RelSlice<TileInfoPOD> tile_info;
     RelSlice<VariantInfoPOD> variants;
+    RelSlice<SpineInfoPOD> spines;
 });
 
 /************************ End of chipdb section. ************************/
@@ -960,6 +963,7 @@ struct Arch : BaseArch<ArchRanges>
         NPNR_ASSERT_FALSE_STR("no tile with type " + type);
     }
 
+    bool is_spine_row(int row) const;
     // Apply LPF constraints to the context
     bool apply_lpf(std::string filename, std::istream &in);
 
diff --git a/machxo2/facade_import.py b/machxo2/facade_import.py
index e07c1921..04b16b31 100644
--- a/machxo2/facade_import.py
+++ b/machxo2/facade_import.py
@@ -394,6 +394,11 @@ def write_database(dev_name, chip, rg, endianness):
         bba.r_slice("supported_speed_grades_%s" % name, len(var_data["speeds"]), "supported_speed_grades")
         bba.r_slice("supported_suffixes_%s" % name, len(var_data["suffixes"]), "supported_suffixes")
 
+    bba.l("spine_info", "SpineInfoPOD")
+    spines = chip.global_data_machxo2.spines
+    for spine in spines:
+        bba.u32(spine.row, "row")
+
     bba.l("chip_info")
     bba.s(chip.info.family, "family")
     bba.s(chip.info.name, "device_name")
@@ -408,6 +413,7 @@ def write_database(dev_name, chip, rg, endianness):
     bba.r_slice("pio_info", len(pindata), "pio_info")
     bba.r_slice("tiles_info", (max_col + 1) * (max_row + 1), "tile_info")
     bba.r_slice("variant_data", len(variants), "variant_info")
+    bba.r_slice("spine_info", len(spines), "spine_info")
 
     bba.pop()
     return bba