Merge branch 'ecp5' into 'master'

Adding ECP5 support

See merge request SymbioticEDA/nextpnr!5

35 files changed, 3581 insertions, 9 deletions

diff --git a/.gitignore b/.gitignore
index f308b34a..6ca9e19f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 /objs/
 /nextpnr-generic*
 /nextpnr-ice40*
+/nextpnr-ecp5*
 cmake-build-*/
 Makefile
 cmake_install.cmake
diff --git a/CMakeLists.txt b/CMakeLists.txt
index dc4e2a4f..cbcdf67d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,7 +7,8 @@ option(BUILD_PYTHON "Build Python Integration" ON)
 option(BUILD_TESTS "Build GUI" OFF)
 
 # List of families to build
-set(FAMILIES generic ice40)
+set(FAMILIES generic ice40 ecp5)
+
 set(ARCH "" CACHE STRING "Architecture family for nextpnr build")
 set_property(CACHE ARCH PROPERTY STRINGS ${FAMILIES})
 
@@ -217,6 +218,7 @@ endforeach (family)
 
 file(GLOB_RECURSE CLANGFORMAT_FILES *.cc *.h)
 string(REGEX REPLACE "[^;]*/ice40/chipdbs/chipdb-[^;]*.cc" "" CLANGFORMAT_FILES "${CLANGFORMAT_FILES}")
+string(REGEX REPLACE "[^;]*/ecp5/chipdbs/chipdb-[^;]*.cc" "" CLANGFORMAT_FILES "${CLANGFORMAT_FILES}")
 string(REGEX REPLACE "[^;]*/3rdparty[^;]*" "" CLANGFORMAT_FILES "${CLANGFORMAT_FILES}")
 string(REGEX REPLACE "[^;]*/generated[^;]*" "" CLANGFORMAT_FILES "${CLANGFORMAT_FILES}")
 
diff --git a/common/pybindings.cc b/common/pybindings.cc
index 1a0eba8f..061dfc47 100644
--- a/common/pybindings.cc
+++ b/common/pybindings.cc
@@ -110,13 +110,13 @@ BOOST_PYTHON_MODULE(MODULE_NAME)
     readwrite_wrapper<CellInfo &, decltype(&CellInfo::belStrength), &CellInfo::belStrength, pass_through<PlaceStrength>,
                       pass_through<PlaceStrength>>::def_wrap(ci_cls, "belStrength");
     readonly_wrapper<CellInfo &, decltype(&CellInfo::pins), &CellInfo::pins, wrap_context<PinMap &>>::def_wrap(ci_cls,
-                                                                                                             "pins");
+                                                                                                               "pins");
 
     auto pi_cls = class_<ContextualWrapper<PortInfo &>>("PortInfo", no_init);
     readwrite_wrapper<PortInfo &, decltype(&PortInfo::name), &PortInfo::name, conv_to_str<IdString>,
                       conv_from_str<IdString>>::def_wrap(pi_cls, "name");
     readonly_wrapper<PortInfo &, decltype(&PortInfo::net), &PortInfo::net, deref_and_wrap<NetInfo>>::def_wrap(pi_cls,
-                                                                                                            "net");
+                                                                                                              "net");
     readwrite_wrapper<PortInfo &, decltype(&PortInfo::type), &PortInfo::type, pass_through<PortType>,
                       pass_through<PortType>>::def_wrap(pi_cls, "type");
 
@@ -131,11 +131,11 @@ BOOST_PYTHON_MODULE(MODULE_NAME)
     readonly_wrapper<NetInfo &, decltype(&NetInfo::users), &NetInfo::users, wrap_context<PortVector &>>::def_wrap(
             ni_cls, "users");
     readonly_wrapper<NetInfo &, decltype(&NetInfo::wires), &NetInfo::wires, wrap_context<WireMap &>>::def_wrap(ni_cls,
-                                                                                                             "wires");
+                                                                                                               "wires");
 
     auto pr_cls = class_<ContextualWrapper<PortRef &>>("PortRef", no_init);
     readonly_wrapper<PortRef &, decltype(&PortRef::cell), &PortRef::cell, deref_and_wrap<CellInfo>>::def_wrap(pr_cls,
-                                                                                                            "cell");
+                                                                                                              "cell");
     readwrite_wrapper<PortRef &, decltype(&PortRef::port), &PortRef::port, conv_to_str<IdString>,
                       conv_from_str<IdString>>::def_wrap(pr_cls, "port");
     readwrite_wrapper<PortRef &, decltype(&PortRef::budget), &PortRef::budget, pass_through<delay_t>,
diff --git a/common/util.h b/common/util.h
index 60eb35af..8f361dc8 100644
--- a/common/util.h
+++ b/common/util.h
@@ -39,6 +39,18 @@ ValueType get_or_default(const Container &ct, const KeyType &key, ValueType def
         return found->second;
 };
 
+// Get a value from a map-style container, returning default if value is not
+// found (forces string)
+template <typename Container, typename KeyType>
+std::string str_or_default(const Container &ct, const KeyType &key, std::string def = "")
+{
+    auto found = ct.find(key);
+    if (found == ct.end())
+        return def;
+    else
+        return found->second;
+};
+
 // Get a value from a map-style container, converting to int, and returning
 // default if value is not found
 template <typename Container, typename KeyType> int int_or_default(const Container &ct, const KeyType &key, int def = 0)
@@ -84,6 +96,7 @@ inline const NetInfo *get_net_or_empty(const CellInfo *cell, const IdString port
     else
         return nullptr;
 };
+
 NEXTPNR_NAMESPACE_END
 
 #endif
diff --git a/ecp5/.gitignore b/ecp5/.gitignore
new file mode 100644
index 00000000..3249a7bb
--- /dev/null
+++ b/ecp5/.gitignore
@@ -0,0 +1,2 @@
+__pycache__
+chipdbs/
diff --git a/ecp5/arch.cc b/ecp5/arch.cc
new file mode 100644
index 00000000..7217af78
--- /dev/null
+++ b/ecp5/arch.cc
@@ -0,0 +1,336 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  Clifford Wolf <clifford@symbioticeda.com>
+ *  Copyright (C) 2018  David Shah <david@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include <algorithm>
+#include <cmath>
+#include <cstring>
+#include "log.h"
+#include "nextpnr.h"
+#include "util.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+static std::tuple<int, int, std::string> split_identifier_name(const std::string &name)
+{
+    size_t first_slash = name.find('/');
+    NPNR_ASSERT(first_slash != std::string::npos);
+    size_t second_slash = name.find('/', first_slash + 1);
+    NPNR_ASSERT(second_slash != std::string::npos);
+    return std::make_tuple(std::stoi(name.substr(1, first_slash)),
+                           std::stoi(name.substr(first_slash + 2, second_slash - first_slash)),
+                           name.substr(second_slash + 1));
+};
+
+// -----------------------------------------------------------------------
+
+IdString Arch::belTypeToId(BelType type) const
+{
+    if (type == TYPE_TRELLIS_SLICE)
+        return id("TRELLIS_SLICE");
+    if (type == TYPE_TRELLIS_IO)
+        return id("TRELLIS_IO");
+    return IdString();
+}
+
+BelType Arch::belTypeFromId(IdString type) const
+{
+    if (type == id("TRELLIS_SLICE"))
+        return TYPE_TRELLIS_SLICE;
+    if (type == id("TRELLIS_IO"))
+        return TYPE_TRELLIS_IO;
+    return TYPE_NONE;
+}
+
+// -----------------------------------------------------------------------
+
+void IdString::initialize_arch(const BaseCtx *ctx)
+{
+#define X(t) initialize_add(ctx, #t, PIN_##t);
+
+#include "portpins.inc"
+
+#undef X
+}
+
+IdString Arch::portPinToId(PortPin type) const
+{
+    IdString ret;
+    if (type > 0 && type < PIN_MAXIDX)
+        ret.index = type;
+    return ret;
+}
+
+PortPin Arch::portPinFromId(IdString type) const
+{
+    if (type.index > 0 && type.index < PIN_MAXIDX)
+        return PortPin(type.index);
+    return PIN_NONE;
+}
+
+// -----------------------------------------------------------------------
+
+static const ChipInfoPOD *get_chip_info(const RelPtr<ChipInfoPOD> *ptr) { return ptr->get(); }
+
+#if defined(_MSC_VER)
+void load_chipdb();
+#endif
+
+#define LFE5U_45F_ONLY
+
+Arch::Arch(ArchArgs args) : args(args)
+{
+#if defined(_MSC_VER)
+    load_chipdb();
+#endif
+#ifdef LFE5U_45F_ONLY
+    if (args.type == ArchArgs::LFE5U_45F) {
+        chip_info = get_chip_info(reinterpret_cast<const RelPtr<ChipInfoPOD> *>(chipdb_blob_45k));
+    } else {
+        log_error("Unsupported ECP5 chip type.\n");
+    }
+#else
+    if (args.type == ArchArgs::LFE5U_25F) {
+        chip_info = get_chip_info(reinterpret_cast<const RelPtr<ChipInfoPOD> *>(chipdb_blob_25k));
+    } else if (args.type == ArchArgs::LFE5U_45F) {
+        chip_info = get_chip_info(reinterpret_cast<const RelPtr<ChipInfoPOD> *>(chipdb_blob_45k));
+    } else if (args.type == ArchArgs::LFE5U_85F) {
+        chip_info = get_chip_info(reinterpret_cast<const RelPtr<ChipInfoPOD> *>(chipdb_blob_85k));
+    } else {
+        log_error("Unsupported ECP5 chip type.\n");
+    }
+#endif
+}
+
+// -----------------------------------------------------------------------
+
+std::string Arch::getChipName()
+{
+
+    if (args.type == ArchArgs::LFE5U_25F) {
+        return "LFE5U-25F";
+    } else if (args.type == ArchArgs::LFE5U_45F) {
+        return "LFE5U-45F";
+    } else if (args.type == ArchArgs::LFE5U_85F) {
+        return "LFE5U-85F";
+    } else {
+        log_error("Unknown chip\n");
+    }
+}
+
+// -----------------------------------------------------------------------
+
+IdString Arch::archArgsToId(ArchArgs args) const
+{
+    if (args.type == ArchArgs::LFE5U_25F)
+        return id("lfe5u_25f");
+    if (args.type == ArchArgs::LFE5U_45F)
+        return id("lfe5u_45f");
+    if (args.type == ArchArgs::LFE5U_85F)
+        return id("lfe5u_85f");
+    return IdString();
+}
+
+// -----------------------------------------------------------------------
+
+BelId Arch::getBelByName(IdString name) const
+{
+    BelId ret;
+    auto it = bel_by_name.find(name);
+    if (it != bel_by_name.end())
+        return it->second;
+
+    Location loc;
+    std::string basename;
+    std::tie(loc.x, loc.y, basename) = split_identifier_name(name.str(this));
+    ret.location = loc;
+    const LocationTypePOD *loci = locInfo(ret);
+    for (int i = 0; i < loci->num_bels; i++) {
+        if (std::strcmp(loci->bel_data[i].name.get(), basename.c_str()) == 0) {
+            ret.index = i;
+            break;
+        }
+    }
+    if (ret.index >= 0)
+        bel_by_name[name] = ret;
+    return ret;
+}
+
+BelRange Arch::getBelsAtSameTile(BelId bel) const
+{
+    BelRange br;
+    NPNR_ASSERT(bel != BelId());
+    br.b.cursor_tile = bel.location.y * chip_info->width + bel.location.x;
+    br.e.cursor_tile = bel.location.y * chip_info->width + bel.location.x;
+    br.b.cursor_index = 0;
+    br.e.cursor_index = locInfo(bel)->num_bels;
+    return br;
+}
+
+WireId Arch::getWireBelPin(BelId bel, PortPin pin) const
+{
+    WireId ret;
+
+    NPNR_ASSERT(bel != BelId());
+
+    int num_bel_wires = locInfo(bel)->bel_data[bel.index].num_bel_wires;
+    const BelWirePOD *bel_wires = locInfo(bel)->bel_data[bel.index].bel_wires.get();
+    for (int i = 0; i < num_bel_wires; i++)
+        if (bel_wires[i].port == pin) {
+            ret.location = bel.location + bel_wires[i].rel_wire_loc;
+            ret.index = bel_wires[i].wire_index;
+            break;
+        }
+
+    return ret;
+}
+
+// -----------------------------------------------------------------------
+
+WireId Arch::getWireByName(IdString name) const
+{
+    WireId ret;
+    auto it = wire_by_name.find(name);
+    if (it != wire_by_name.end())
+        return it->second;
+
+    Location loc;
+    std::string basename;
+    std::tie(loc.x, loc.y, basename) = split_identifier_name(name.str(this));
+    ret.location = loc;
+    const LocationTypePOD *loci = locInfo(ret);
+    for (int i = 0; i < loci->num_wires; i++) {
+        if (std::strcmp(loci->wire_data[i].name.get(), basename.c_str()) == 0) {
+            ret.index = i;
+            ret.location = loc;
+            break;
+        }
+    }
+    if (ret.index >= 0)
+        wire_by_name[name] = ret;
+    else
+        ret.location = Location();
+    return ret;
+}
+
+// -----------------------------------------------------------------------
+
+PipId Arch::getPipByName(IdString name) const
+{
+    auto it = pip_by_name.find(name);
+    if (it != pip_by_name.end())
+        return it->second;
+
+    PipId ret;
+    Location loc;
+    std::string basename;
+    std::tie(loc.x, loc.y, basename) = split_identifier_name(name.str(this));
+    const LocationTypePOD *loci = locInfo(ret);
+    for (int i = 0; i < loci->num_pips; i++) {
+        PipId curr;
+        curr.location = loc;
+        curr.index = i;
+        pip_by_name[getPipName(curr)] = curr;
+    }
+    return pip_by_name[name];
+}
+
+IdString Arch::getPipName(PipId pip) const
+{
+    NPNR_ASSERT(pip != PipId());
+
+    int x = pip.location.x;
+    int y = pip.location.y;
+
+    std::string src_name = getWireName(getPipSrcWire(pip)).str(this);
+    std::replace(src_name.begin(), src_name.end(), '/', '.');
+
+    std::string dst_name = getWireName(getPipDstWire(pip)).str(this);
+    std::replace(dst_name.begin(), dst_name.end(), '/', '.');
+
+    return id("X" + std::to_string(x) + "/Y" + std::to_string(y) + "/" + src_name + ".->." + dst_name);
+}
+
+// -----------------------------------------------------------------------
+
+BelId Arch::getPackagePinBel(const std::string &pin) const { return BelId(); }
+
+std::string Arch::getBelPackagePin(BelId bel) const { return ""; }
+// -----------------------------------------------------------------------
+
+void Arch::estimatePosition(BelId bel, int &x, int &y, bool &gb) const
+{
+    x = bel.location.x;
+    y = bel.location.y;
+    gb = false;
+}
+
+delay_t Arch::estimateDelay(WireId src, WireId dst) const
+{
+    return abs(src.location.x - dst.location.x) + abs(src.location.y - dst.location.y);
+}
+
+// -----------------------------------------------------------------------
+
+std::vector<GraphicElement> Arch::getFrameGraphics() const
+{
+    std::vector<GraphicElement> ret;
+
+    return ret;
+}
+
+std::vector<GraphicElement> Arch::getBelGraphics(BelId bel) const
+{
+    std::vector<GraphicElement> ret;
+
+    return ret;
+}
+
+std::vector<GraphicElement> Arch::getWireGraphics(WireId wire) const
+{
+    std::vector<GraphicElement> ret;
+    // FIXME
+    return ret;
+}
+
+std::vector<GraphicElement> Arch::getPipGraphics(PipId pip) const
+{
+    std::vector<GraphicElement> ret;
+    // FIXME
+    return ret;
+};
+
+// -----------------------------------------------------------------------
+
+bool Arch::isValidBelForCell(CellInfo *cell, BelId bel) const { return true; }
+
+bool Arch::isBelLocationValid(BelId bel) const { return true; }
+
+// -----------------------------------------------------------------------
+
+bool Arch::getCellDelay(const CellInfo *cell, IdString fromPort, IdString toPort, delay_t &delay) const
+{
+    return false;
+}
+
+IdString Arch::getPortClock(const CellInfo *cell, IdString port) const { return IdString(); }
+
+bool Arch::isClockPort(const CellInfo *cell, IdString port) const { return false; }
+
+NEXTPNR_NAMESPACE_END
diff --git a/ecp5/arch.h b/ecp5/arch.h
new file mode 100644
index 00000000..cc63eeaa
--- /dev/null
+++ b/ecp5/arch.h
@@ -0,0 +1,752 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  Clifford Wolf <clifford@symbioticeda.com>
+ *  Copyright (C) 2018  David Shah <david@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#ifndef NEXTPNR_H
+#error Include "arch.h" via "nextpnr.h" only.
+#endif
+
+#include <sstream>
+
+NEXTPNR_NAMESPACE_BEGIN
+
+/**** Everything in this section must be kept in sync with chipdb.py ****/
+
+template <typename T> struct RelPtr
+{
+    int32_t offset;
+
+    // void set(const T *ptr) {
+    //     offset = reinterpret_cast<const char*>(ptr) -
+    //              reinterpret_cast<const char*>(this);
+    // }
+
+    const T *get() const { return reinterpret_cast<const T *>(reinterpret_cast<const char *>(this) + offset); }
+
+    const T &operator[](size_t index) const { return get()[index]; }
+
+    const T &operator*() const { return *(get()); }
+
+    const T *operator->() const { return get(); }
+};
+
+NPNR_PACKED_STRUCT(struct BelWirePOD {
+    LocationPOD rel_wire_loc;
+    int32_t wire_index;
+    PortPin port;
+});
+
+NPNR_PACKED_STRUCT(struct BelInfoPOD {
+    RelPtr<char> name;
+    BelType type;
+    int32_t num_bel_wires;
+    RelPtr<BelWirePOD> bel_wires;
+});
+
+NPNR_PACKED_STRUCT(struct BelPortPOD {
+    LocationPOD rel_bel_loc;
+    int32_t bel_index;
+    PortPin port;
+});
+
+NPNR_PACKED_STRUCT(struct PipInfoPOD {
+    LocationPOD rel_src_loc, rel_dst_loc;
+    int32_t src_idx, dst_idx;
+    int32_t delay;
+    int16_t tile_type;
+    int8_t pip_type;
+    int8_t padding_0;
+});
+
+NPNR_PACKED_STRUCT(struct PipLocatorPOD {
+    LocationPOD rel_loc;
+    int32_t index;
+});
+
+NPNR_PACKED_STRUCT(struct WireInfoPOD {
+    RelPtr<char> name;
+    int32_t num_uphill, num_downhill;
+    RelPtr<PipLocatorPOD> pips_uphill, pips_downhill;
+
+    int32_t num_bels_downhill;
+    BelPortPOD bel_uphill;
+    RelPtr<BelPortPOD> bels_downhill;
+});
+
+NPNR_PACKED_STRUCT(struct LocationTypePOD {
+    int32_t num_bels, num_wires, num_pips;
+    RelPtr<BelInfoPOD> bel_data;
+    RelPtr<WireInfoPOD> wire_data;
+    RelPtr<PipInfoPOD> pip_data;
+});
+
+NPNR_PACKED_STRUCT(struct ChipInfoPOD {
+    int32_t width, height;
+    int32_t num_tiles;
+    int32_t num_location_types;
+    RelPtr<LocationTypePOD> locations;
+    RelPtr<int32_t> location_type;
+    RelPtr<RelPtr<char>> tiletype_names;
+});
+
+#if defined(_MSC_VER)
+extern const char *chipdb_blob_25k;
+extern const char *chipdb_blob_45k;
+extern const char *chipdb_blob_85k;
+#else
+extern const char chipdb_blob_25k[];
+extern const char chipdb_blob_45k[];
+extern const char chipdb_blob_85k[];
+#endif
+
+/************************ End of chipdb section. ************************/
+
+struct BelIterator
+{
+    const ChipInfoPOD *chip;
+    int cursor_index;
+    int cursor_tile;
+
+    BelIterator operator++()
+    {
+        cursor_index++;
+        while (cursor_tile < chip->num_tiles &&
+               cursor_index >= chip->locations[chip->location_type[cursor_tile]].num_bels) {
+            cursor_index = 0;
+            cursor_tile++;
+        }
+        return *this;
+    }
+    BelIterator operator++(int)
+    {
+        BelIterator prior(*this);
+        ++(*this);
+        return prior;
+    }
+
+    bool operator!=(const BelIterator &other) const
+    {
+        return cursor_index != other.cursor_index || cursor_tile != other.cursor_tile;
+    }
+
+    bool operator==(const BelIterator &other) const
+    {
+        return cursor_index == other.cursor_index && cursor_tile == other.cursor_tile;
+    }
+
+    BelId operator*() const
+    {
+        BelId ret;
+        ret.location.x = cursor_tile % chip->width;
+        ret.location.y = cursor_tile / chip->width;
+        ret.index = cursor_index;
+        return ret;
+    }
+};
+
+struct BelRange
+{
+    BelIterator b, e;
+    BelIterator begin() const { return b; }
+    BelIterator end() const { return e; }
+};
+
+// -----------------------------------------------------------------------
+
+struct BelPinIterator
+{
+    const BelPortPOD *ptr = nullptr;
+    Location wire_loc;
+    void operator++() { ptr++; }
+    bool operator!=(const BelPinIterator &other) const { return ptr != other.ptr; }
+
+    BelPin operator*() const
+    {
+        BelPin ret;
+        ret.bel.index = ptr->bel_index;
+        ret.bel.location = wire_loc + ptr->rel_bel_loc;
+        ret.pin = ptr->port;
+        return ret;
+    }
+};
+
+struct BelPinRange
+{
+    BelPinIterator b, e;
+    BelPinIterator begin() const { return b; }
+    BelPinIterator end() const { return e; }
+};
+
+// -----------------------------------------------------------------------
+
+struct WireIterator
+{
+    const ChipInfoPOD *chip;
+    int cursor_index;
+    int cursor_tile;
+
+    WireIterator operator++()
+    {
+        cursor_index++;
+        while (cursor_tile < chip->num_tiles &&
+               cursor_index >= chip->locations[chip->location_type[cursor_tile]].num_wires) {
+            cursor_index = 0;
+            cursor_tile++;
+        }
+        return *this;
+    }
+    WireIterator operator++(int)
+    {
+        WireIterator prior(*this);
+        ++(*this);
+        return prior;
+    }
+
+    bool operator!=(const WireIterator &other) const
+    {
+        return cursor_index != other.cursor_index || cursor_tile != other.cursor_tile;
+    }
+
+    bool operator==(const WireIterator &other) const
+    {
+        return cursor_index == other.cursor_index && cursor_tile == other.cursor_tile;
+    }
+
+    WireId operator*() const
+    {
+        WireId ret;
+        ret.location.x = cursor_tile % chip->width;
+        ret.location.y = cursor_tile / chip->width;
+        ret.index = cursor_index;
+        return ret;
+    }
+};
+
+struct WireRange
+{
+    WireIterator b, e;
+    WireIterator begin() const { return b; }
+    WireIterator end() const { return e; }
+};
+
+// -----------------------------------------------------------------------
+
+struct AllPipIterator
+{
+    const ChipInfoPOD *chip;
+    int cursor_index;
+    int cursor_tile;
+
+    AllPipIterator operator++()
+    {
+        cursor_index++;
+        while (cursor_tile < chip->num_tiles &&
+               cursor_index >= chip->locations[chip->location_type[cursor_tile]].num_pips) {
+            cursor_index = 0;
+            cursor_tile++;
+        }
+        return *this;
+    }
+    AllPipIterator operator++(int)
+    {
+        AllPipIterator prior(*this);
+        ++(*this);
+        return prior;
+    }
+
+    bool operator!=(const AllPipIterator &other) const
+    {
+        return cursor_index != other.cursor_index || cursor_tile != other.cursor_tile;
+    }
+
+    bool operator==(const AllPipIterator &other) const
+    {
+        return cursor_index == other.cursor_index && cursor_tile == other.cursor_tile;
+    }
+
+    PipId operator*() const
+    {
+        PipId ret;
+        ret.location.x = cursor_tile % chip->width;
+        ret.location.y = cursor_tile / chip->width;
+        ret.index = cursor_index;
+        return ret;
+    }
+};
+
+struct AllPipRange
+{
+    AllPipIterator b, e;
+    AllPipIterator begin() const { return b; }
+    AllPipIterator end() const { return e; }
+};
+
+// -----------------------------------------------------------------------
+
+struct PipIterator
+{
+
+    const PipLocatorPOD *cursor = nullptr;
+    Location wire_loc;
+
+    void operator++() { cursor++; }
+    bool operator!=(const PipIterator &other) const { return cursor != other.cursor; }
+
+    PipId operator*() const
+    {
+        PipId ret;
+        ret.index = cursor->index;
+        ret.location = wire_loc + cursor->rel_loc;
+        return ret;
+    }
+};
+
+struct PipRange
+{
+    PipIterator b, e;
+    PipIterator begin() const { return b; }
+    PipIterator end() const { return e; }
+};
+
+struct ArchArgs
+{
+    enum
+    {
+        NONE,
+        LFE5U_25F,
+        LFE5U_45F,
+        LFE5U_85F,
+    } type = NONE;
+    std::string package;
+    int speed = 6;
+};
+
+struct Arch : BaseCtx
+{
+    const ChipInfoPOD *chip_info;
+
+    mutable std::unordered_map<IdString, BelId> bel_by_name;
+    mutable std::unordered_map<IdString, WireId> wire_by_name;
+    mutable std::unordered_map<IdString, PipId> pip_by_name;
+
+    std::unordered_map<BelId, IdString> bel_to_cell;
+    std::unordered_map<WireId, IdString> wire_to_net;
+    std::unordered_map<PipId, IdString> pip_to_net;
+    std::unordered_map<PipId, IdString> switches_locked;
+
+    ArchArgs args;
+    Arch(ArchArgs args);
+
+    std::string getChipName();
+
+    IdString archId() const { return id("ecp5"); }
+    IdString archArgsToId(ArchArgs args) const;
+
+    IdString belTypeToId(BelType type) const;
+    BelType belTypeFromId(IdString id) const;
+
+    IdString portPinToId(PortPin type) const;
+    PortPin portPinFromId(IdString id) const;
+
+    // -------------------------------------------------
+
+    BelId getBelByName(IdString name) const;
+
+    template <typename Id> const LocationTypePOD *locInfo(Id &id) const
+    {
+        return &(chip_info->locations[chip_info->location_type[id.location.y * chip_info->width + id.location.x]]);
+    }
+
+    IdString getBelName(BelId bel) const
+    {
+        NPNR_ASSERT(bel != BelId());
+        std::stringstream name;
+        name << "X" << bel.location.x << "/Y" << bel.location.y << "/" << locInfo(bel)->bel_data[bel.index].name.get();
+        return id(name.str());
+    }
+
+    uint32_t getBelChecksum(BelId bel) const { return bel.index; }
+
+    void bindBel(BelId bel, IdString cell, PlaceStrength strength)
+    {
+        NPNR_ASSERT(bel != BelId());
+        NPNR_ASSERT(bel_to_cell[bel] == IdString());
+        bel_to_cell[bel] = cell;
+        cells[cell]->bel = bel;
+        cells[cell]->belStrength = strength;
+    }
+
+    void unbindBel(BelId bel)
+    {
+        NPNR_ASSERT(bel != BelId());
+        NPNR_ASSERT(bel_to_cell[bel] != IdString());
+        cells[bel_to_cell[bel]]->bel = BelId();
+        cells[bel_to_cell[bel]]->belStrength = STRENGTH_NONE;
+        bel_to_cell[bel] = IdString();
+    }
+
+    bool checkBelAvail(BelId bel) const
+    {
+        NPNR_ASSERT(bel != BelId());
+        return bel_to_cell.find(bel) == bel_to_cell.end() || bel_to_cell.at(bel) == IdString();
+    }
+
+    IdString getBoundBelCell(BelId bel) const
+    {
+        NPNR_ASSERT(bel != BelId());
+        if (bel_to_cell.find(bel) == bel_to_cell.end())
+            return IdString();
+        else
+            return bel_to_cell.at(bel);
+    }
+
+    IdString getConflictingBelCell(BelId bel) const
+    {
+        NPNR_ASSERT(bel != BelId());
+        if (bel_to_cell.find(bel) == bel_to_cell.end())
+            return IdString();
+        else
+            return bel_to_cell.at(bel);
+    }
+
+    BelRange getBels() const
+    {
+        BelRange range;
+        range.b.cursor_tile = 0;
+        range.b.cursor_index = -1;
+        range.b.chip = chip_info;
+        ++range.b; //-1 and then ++ deals with the case of no Bels in the first tile
+        range.e.cursor_tile = chip_info->width * chip_info->height;
+        range.e.cursor_index = 0;
+        range.e.chip = chip_info;
+        return range;
+    }
+
+    BelRange getBelsByType(BelType type) const
+    {
+        BelRange range;
+// FIXME
+#if 0
+        if (type == "TYPE_A") {
+			range.b.cursor = bels_type_a_begin;
+			range.e.cursor = bels_type_a_end;
+		}
+		...
+#endif
+        return range;
+    }
+
+    BelRange getBelsAtSameTile(BelId bel) const;
+
+    BelType getBelType(BelId bel) const
+    {
+        NPNR_ASSERT(bel != BelId());
+        return locInfo(bel)->bel_data[bel.index].type;
+    }
+
+    WireId getWireBelPin(BelId bel, PortPin pin) const;
+
+    BelPin getBelPinUphill(WireId wire) const
+    {
+        BelPin ret;
+        NPNR_ASSERT(wire != WireId());
+
+        if (locInfo(wire)->wire_data[wire.index].bel_uphill.bel_index >= 0) {
+            ret.bel.index = locInfo(wire)->wire_data[wire.index].bel_uphill.bel_index;
+            ret.bel.location = wire.location + locInfo(wire)->wire_data[wire.index].bel_uphill.rel_bel_loc;
+            ret.pin = locInfo(wire)->wire_data[wire.index].bel_uphill.port;
+        }
+
+        return ret;
+    }
+
+    BelPinRange getBelPinsDownhill(WireId wire) const
+    {
+        BelPinRange range;
+        NPNR_ASSERT(wire != WireId());
+        range.b.ptr = locInfo(wire)->wire_data[wire.index].bels_downhill.get();
+        range.b.wire_loc = wire.location;
+        range.e.ptr = range.b.ptr + locInfo(wire)->wire_data[wire.index].num_bels_downhill;
+        range.e.wire_loc = wire.location;
+        return range;
+    }
+
+    // -------------------------------------------------
+
+    WireId getWireByName(IdString name) const;
+
+    IdString getWireName(WireId wire) const
+    {
+        NPNR_ASSERT(wire != WireId());
+
+        std::stringstream name;
+        name << "X" << wire.location.x << "/Y" << wire.location.y << "/"
+             << locInfo(wire)->wire_data[wire.index].name.get();
+        return id(name.str());
+    }
+
+    uint32_t getWireChecksum(WireId wire) const { return wire.index; }
+
+    void bindWire(WireId wire, IdString net, PlaceStrength strength)
+    {
+        NPNR_ASSERT(wire != WireId());
+        NPNR_ASSERT(wire_to_net[wire] == IdString());
+        wire_to_net[wire] = net;
+        nets[net]->wires[wire].pip = PipId();
+        nets[net]->wires[wire].strength = strength;
+    }
+
+    void unbindWire(WireId wire)
+    {
+        NPNR_ASSERT(wire != WireId());
+        NPNR_ASSERT(wire_to_net[wire] != IdString());
+
+        auto &net_wires = nets[wire_to_net[wire]]->wires;
+        auto it = net_wires.find(wire);
+        NPNR_ASSERT(it != net_wires.end());
+
+        auto pip = it->second.pip;
+        if (pip != PipId()) {
+            pip_to_net[pip] = IdString();
+        }
+
+        net_wires.erase(it);
+        wire_to_net[wire] = IdString();
+    }
+
+    bool checkWireAvail(WireId wire) const
+    {
+        NPNR_ASSERT(wire != WireId());
+        return wire_to_net.find(wire) == wire_to_net.end() || wire_to_net.at(wire) == IdString();
+    }
+
+    IdString getBoundWireNet(WireId wire) const
+    {
+        NPNR_ASSERT(wire != WireId());
+        if (wire_to_net.find(wire) == wire_to_net.end())
+            return IdString();
+        else
+            return wire_to_net.at(wire);
+    }
+
+    IdString getConflictingWireNet(WireId wire) const
+    {
+        NPNR_ASSERT(wire != WireId());
+        if (wire_to_net.find(wire) == wire_to_net.end())
+            return IdString();
+        else
+            return wire_to_net.at(wire);
+    }
+
+    WireRange getWires() const
+    {
+        WireRange range;
+        range.b.cursor_tile = 0;
+        range.b.cursor_index = -1;
+        range.b.chip = chip_info;
+        ++range.b; //-1 and then ++ deals with the case of no wries in the first tile
+        range.e.cursor_tile = chip_info->width * chip_info->height;
+        range.e.cursor_index = 0;
+        range.e.chip = chip_info;
+        return range;
+    }
+
+    // -------------------------------------------------
+
+    PipId getPipByName(IdString name) const;
+    IdString getPipName(PipId pip) const;
+
+    uint32_t getPipChecksum(PipId pip) const { return pip.index; }
+
+    void bindPip(PipId pip, IdString net, PlaceStrength strength)
+    {
+        NPNR_ASSERT(pip != PipId());
+        NPNR_ASSERT(pip_to_net[pip] == IdString());
+
+        pip_to_net[pip] = net;
+
+        WireId dst;
+        dst.index = locInfo(pip)->pip_data[pip.index].dst_idx;
+        dst.location = pip.location + locInfo(pip)->pip_data[pip.index].rel_dst_loc;
+        NPNR_ASSERT(wire_to_net[dst] == IdString());
+        wire_to_net[dst] = net;
+        nets[net]->wires[dst].pip = pip;
+        nets[net]->wires[dst].strength = strength;
+    }
+
+    void unbindPip(PipId pip)
+    {
+        NPNR_ASSERT(pip != PipId());
+        NPNR_ASSERT(pip_to_net[pip] != IdString());
+
+        WireId dst;
+        dst.index = locInfo(pip)->pip_data[pip.index].dst_idx;
+        dst.location = pip.location + locInfo(pip)->pip_data[pip.index].rel_dst_loc;
+        NPNR_ASSERT(wire_to_net[dst] != IdString());
+        wire_to_net[dst] = IdString();
+        nets[pip_to_net[pip]]->wires.erase(dst);
+
+        pip_to_net[pip] = IdString();
+    }
+
+    bool checkPipAvail(PipId pip) const
+    {
+        NPNR_ASSERT(pip != PipId());
+        return pip_to_net.find(pip) == pip_to_net.end() || pip_to_net.at(pip) == IdString();
+    }
+
+    IdString getBoundPipNet(PipId pip) const
+    {
+        NPNR_ASSERT(pip != PipId());
+        if (pip_to_net.find(pip) == pip_to_net.end())
+            return IdString();
+        else
+            return pip_to_net.at(pip);
+    }
+
+    IdString getConflictingPipNet(PipId pip) const
+    {
+        NPNR_ASSERT(pip != PipId());
+        if (pip_to_net.find(pip) == pip_to_net.end())
+            return IdString();
+        else
+            return pip_to_net.at(pip);
+    }
+
+    AllPipRange getPips() const
+    {
+        AllPipRange range;
+        range.b.cursor_tile = 0;
+        range.b.cursor_index = -1;
+        range.b.chip = chip_info;
+        ++range.b; //-1 and then ++ deals with the case of no wries in the first tile
+        range.e.cursor_tile = chip_info->width * chip_info->height;
+        range.e.cursor_index = 0;
+        range.e.chip = chip_info;
+        return range;
+    }
+
+    WireId getPipSrcWire(PipId pip) const
+    {
+        WireId wire;
+        NPNR_ASSERT(pip != PipId());
+        wire.index = locInfo(pip)->pip_data[pip.index].src_idx;
+        wire.location = pip.location + locInfo(pip)->pip_data[pip.index].rel_src_loc;
+        return wire;
+    }
+
+    WireId getPipDstWire(PipId pip) const
+    {
+        WireId wire;
+        NPNR_ASSERT(pip != PipId());
+        wire.index = locInfo(pip)->pip_data[pip.index].dst_idx;
+        wire.location = pip.location + locInfo(pip)->pip_data[pip.index].rel_dst_loc;
+        return wire;
+    }
+
+    DelayInfo getPipDelay(PipId pip) const
+    {
+        DelayInfo delay;
+        NPNR_ASSERT(pip != PipId());
+        delay.delay = locInfo(pip)->pip_data[pip.index].delay;
+        return delay;
+    }
+
+    PipRange getPipsDownhill(WireId wire) const
+    {
+        PipRange range;
+        NPNR_ASSERT(wire != WireId());
+        range.b.cursor = locInfo(wire)->wire_data[wire.index].pips_downhill.get();
+        range.b.wire_loc = wire.location;
+        range.e.cursor = range.b.cursor + locInfo(wire)->wire_data[wire.index].num_downhill;
+        range.e.wire_loc = wire.location;
+        return range;
+    }
+
+    PipRange getPipsUphill(WireId wire) const
+    {
+        PipRange range;
+        NPNR_ASSERT(wire != WireId());
+        range.b.cursor = locInfo(wire)->wire_data[wire.index].pips_uphill.get();
+        range.b.wire_loc = wire.location;
+        range.e.cursor = range.b.cursor + locInfo(wire)->wire_data[wire.index].num_uphill;
+        range.e.wire_loc = wire.location;
+        return range;
+    }
+
+    PipRange getWireAliases(WireId wire) const
+    {
+        PipRange range;
+        NPNR_ASSERT(wire != WireId());
+        range.b.cursor = nullptr;
+        range.e.cursor = nullptr;
+        return range;
+    }
+
+    std::string getPipTiletype(PipId pip) const
+    {
+        return chip_info->tiletype_names[locInfo(pip)->pip_data[pip.index].tile_type].get();
+    }
+
+    int8_t getPipType(PipId pip) const { return locInfo(pip)->pip_data[pip.index].pip_type; }
+
+    BelId getPackagePinBel(const std::string &pin) const;
+    std::string getBelPackagePin(BelId bel) const;
+
+    // -------------------------------------------------
+
+    void estimatePosition(BelId bel, int &x, int &y, bool &gb) const;
+    delay_t estimateDelay(WireId src, WireId dst) const;
+    delay_t getDelayEpsilon() const { return 20; }
+    delay_t getRipupDelayPenalty() const { return 200; }
+    float getDelayNS(delay_t v) const { return v * 0.001; }
+    uint32_t getDelayChecksum(delay_t v) const { return v; }
+
+    // -------------------------------------------------
+
+    std::vector<GraphicElement> getFrameGraphics() const;
+    std::vector<GraphicElement> getBelGraphics(BelId bel) const;
+    std::vector<GraphicElement> getWireGraphics(WireId wire) const;
+    std::vector<GraphicElement> getPipGraphics(PipId pip) const;
+
+    bool allGraphicsReload = false;
+    bool frameGraphicsReload = false;
+    std::unordered_set<BelId> belGraphicsReload;
+    std::unordered_set<WireId> wireGraphicsReload;
+    std::unordered_set<PipId> pipGraphicsReload;
+
+    // -------------------------------------------------
+
+    // Get the delay through a cell from one port to another, returning false
+    // if no path exists
+    bool getCellDelay(const CellInfo *cell, IdString fromPort, IdString toPort, delay_t &delay) const;
+    // Get the associated clock to a port, or empty if the port is combinational
+    IdString getPortClock(const CellInfo *cell, IdString port) const;
+    // Return true if a port is a clock
+    bool isClockPort(const CellInfo *cell, IdString port) const;
+    // Return true if a port is a net
+    bool isGlobalNet(const NetInfo *net) const;
+
+    // -------------------------------------------------
+    // Placement validity checks
+    bool isValidBelForCell(CellInfo *cell, BelId bel) const;
+    bool isBelLocationValid(BelId bel) const;
+};
+
+NEXTPNR_NAMESPACE_END
diff --git a/ecp5/arch_pybindings.cc b/ecp5/arch_pybindings.cc
new file mode 100644
index 00000000..8310c3a1
--- /dev/null
+++ b/ecp5/arch_pybindings.cc
@@ -0,0 +1,32 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  Clifford Wolf <clifford@symbioticeda.com>
+ *  Copyright (C) 2018  David Shah <dave@ds0.me>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#ifndef NO_PYTHON
+
+#include "nextpnr.h"
+#include "pybindings.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+void arch_wrap_python() {}
+
+NEXTPNR_NAMESPACE_END
+
+#endif
diff --git a/ecp5/arch_pybindings.h b/ecp5/arch_pybindings.h
new file mode 100644
index 00000000..a5044f29
--- /dev/null
+++ b/ecp5/arch_pybindings.h
@@ -0,0 +1,75 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  Clifford Wolf <clifford@symbioticeda.com>
+ *  Copyright (C) 2018  David Shah <david@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+#ifndef ARCH_PYBINDINGS_H
+#define ARCH_PYBINDINGS_H
+#ifndef NO_PYTHON
+
+#include "nextpnr.h"
+#include "pybindings.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+namespace PythonConversion {
+
+template <> struct string_converter<BelId>
+{
+    BelId from_str(Context *ctx, std::string name) { return ctx->getBelByName(ctx->id(name)); }
+
+    std::string to_str(Context *ctx, BelId id)
+    {
+        if (id == BelId())
+            throw bad_wrap();
+        return ctx->getBelName(id).str(ctx);
+    }
+};
+
+template <> struct string_converter<BelType>
+{
+    BelType from_str(Context *ctx, std::string name) { return ctx->belTypeFromId(ctx->id(name)); }
+
+    std::string to_str(Context *ctx, BelType typ) { return ctx->belTypeToId(typ).str(ctx); }
+};
+
+template <> struct string_converter<WireId>
+{
+    WireId from_str(Context *ctx, std::string name) { return ctx->getWireByName(ctx->id(name)); }
+
+    std::string to_str(Context *ctx, WireId id) { return ctx->getWireName(id).str(ctx); }
+};
+
+template <> struct string_converter<PipId>
+{
+    PipId from_str(Context *ctx, std::string name) { return ctx->getPipByName(ctx->id(name)); }
+
+    std::string to_str(Context *ctx, PipId id) { return ctx->getPipName(id).str(ctx); }
+};
+
+template <> struct string_converter<PortPin>
+{
+    PortPin from_str(Context *ctx, std::string name) { return ctx->portPinFromId(ctx->id(name)); }
+
+    std::string to_str(Context *ctx, PortPin id) { return ctx->portPinToId(id).str(ctx); }
+};
+
+} // namespace PythonConversion
+
+NEXTPNR_NAMESPACE_END
+#endif
+#endif
diff --git a/ecp5/archdefs.h b/ecp5/archdefs.h
new file mode 100644
index 00000000..4facc786
--- /dev/null
+++ b/ecp5/archdefs.h
@@ -0,0 +1,156 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  David Shah <david@symbioticeda.com>
+ *  Copyright (C) 2018  Clifford Wolf <clifford@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#ifndef NEXTPNR_H
+#error Include "archdefs.h" via "nextpnr.h" only.
+#endif
+
+NEXTPNR_NAMESPACE_BEGIN
+
+typedef int delay_t;
+
+struct DelayInfo
+{
+    delay_t delay = 0;
+
+    delay_t raiseDelay() const { return delay; }
+    delay_t fallDelay() const { return delay; }
+    delay_t avgDelay() const { return delay; }
+
+    DelayInfo operator+(const DelayInfo &other) const
+    {
+        DelayInfo ret;
+        ret.delay = this->delay + other.delay;
+        return ret;
+    }
+};
+
+// -----------------------------------------------------------------------
+
+enum BelType : int32_t
+{
+    TYPE_NONE,
+    TYPE_TRELLIS_SLICE,
+    TYPE_TRELLIS_IO
+};
+
+enum PortPin : int32_t
+{
+    PIN_NONE,
+#define X(t) PIN_##t,
+#include "portpins.inc"
+#undef X
+    PIN_MAXIDX
+};
+
+NPNR_PACKED_STRUCT(struct LocationPOD { int16_t x, y; });
+
+struct Location
+{
+    int16_t x = -1, y = -1;
+    Location() : x(-1), y(-1){};
+    Location(int16_t x, int16_t y) : x(x), y(y){};
+    Location(const LocationPOD &pod) : x(pod.x), y(pod.y){};
+    Location(const Location &loc) : x(loc.x), y(loc.y){};
+
+    bool operator==(const Location &other) const { return x == other.x && y == other.y; }
+    bool operator!=(const Location &other) const { return x != other.x || y != other.y; }
+};
+
+inline Location operator+(const Location &a, const Location &b) { return Location(a.x + b.x, a.y + b.y); }
+
+struct BelId
+{
+    Location location;
+    int32_t index = -1;
+
+    bool operator==(const BelId &other) const { return index == other.index && location == other.location; }
+    bool operator!=(const BelId &other) const { return index != other.index || location != other.location; }
+};
+
+struct WireId
+{
+    Location location;
+    int32_t index = -1;
+
+    bool operator==(const WireId &other) const { return index == other.index && location == other.location; }
+    bool operator!=(const WireId &other) const { return index != other.index || location != other.location; }
+};
+
+struct PipId
+{
+    Location location;
+    int32_t index = -1;
+
+    bool operator==(const PipId &other) const { return index == other.index && location == other.location; }
+    bool operator!=(const PipId &other) const { return index != other.index || location != other.location; }
+};
+
+NEXTPNR_NAMESPACE_END
+
+namespace std {
+template <> struct hash<NEXTPNR_NAMESPACE_PREFIX Location>
+{
+    std::size_t operator()(const NEXTPNR_NAMESPACE_PREFIX Location &loc) const noexcept
+    {
+        std::size_t seed = std::hash<int>()(loc.x);
+        seed ^= std::hash<int>()(loc.y) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
+        return seed;
+    }
+};
+
+template <> struct hash<NEXTPNR_NAMESPACE_PREFIX BelId>
+{
+    std::size_t operator()(const NEXTPNR_NAMESPACE_PREFIX BelId &bel) const noexcept
+    {
+        std::size_t seed = std::hash<NEXTPNR_NAMESPACE_PREFIX Location>()(bel.location);
+        seed ^= std::hash<int>()(bel.index) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
+        return seed;
+    }
+};
+
+template <> struct hash<NEXTPNR_NAMESPACE_PREFIX WireId>
+{
+    std::size_t operator()(const NEXTPNR_NAMESPACE_PREFIX WireId &wire) const noexcept
+    {
+        std::size_t seed = std::hash<NEXTPNR_NAMESPACE_PREFIX Location>()(wire.location);
+        seed ^= std::hash<int>()(wire.index) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
+        return seed;
+    }
+};
+
+template <> struct hash<NEXTPNR_NAMESPACE_PREFIX PipId>
+{
+    std::size_t operator()(const NEXTPNR_NAMESPACE_PREFIX PipId &pip) const noexcept
+    {
+        std::size_t seed = std::hash<NEXTPNR_NAMESPACE_PREFIX Location>()(pip.location);
+        seed ^= std::hash<int>()(pip.index) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
+        return seed;
+    }
+};
+
+template <> struct hash<NEXTPNR_NAMESPACE_PREFIX BelType> : hash<int>
+{
+};
+
+template <> struct hash<NEXTPNR_NAMESPACE_PREFIX PortPin> : hash<int>
+{
+};
+} // namespace std
diff --git a/ecp5/bitstream.cc b/ecp5/bitstream.cc
new file mode 100644
index 00000000..a04a4250
--- /dev/null
+++ b/ecp5/bitstream.cc
@@ -0,0 +1,255 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  David Shah <david@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "bitstream.h"
+
+// From Project Trellis
+#include "BitDatabase.hpp"
+#include "Bitstream.hpp"
+#include "Chip.hpp"
+#include "ChipConfig.hpp"
+#include "Tile.hpp"
+#include "TileConfig.hpp"
+
+#include <fstream>
+#include <streambuf>
+
+#include "log.h"
+#include "util.h"
+
+#define fmt_str(x) (static_cast<const std::ostringstream&>(std::ostringstream() << x).str())
+
+NEXTPNR_NAMESPACE_BEGIN
+
+// Convert an absolute wire name to a relative Trellis one
+static std::string get_trellis_wirename(Context *ctx, Location loc, WireId wire)
+{
+    std::string basename = ctx->locInfo(wire)->wire_data[wire.index].name.get();
+    std::string prefix2 = basename.substr(0, 2);
+    if (prefix2 == "G_" || prefix2 == "L_" || prefix2 == "R_")
+        return basename;
+    if (loc == wire.location)
+        return basename;
+    std::string rel_prefix;
+    if (wire.location.y < loc.y)
+        rel_prefix += "N" + to_string(loc.y - wire.location.y);
+    if (wire.location.y > loc.y)
+        rel_prefix += "S" + to_string(wire.location.y - loc.y);
+    if (wire.location.x > loc.x)
+        rel_prefix += "E" + to_string(wire.location.x - loc.x);
+    if (wire.location.x < loc.x)
+        rel_prefix += "W" + to_string(loc.x - wire.location.x);
+    return rel_prefix + "_" + basename;
+}
+
+static std::vector<bool> int_to_bitvector(int val, int size)
+{
+    std::vector<bool> bv;
+    for (int i = 0; i < size; i++) {
+        bv.push_back((val & (1 << i)) != 0);
+    }
+    return bv;
+}
+
+// Get the PIO tile corresponding to a PIO bel
+static std::string get_pio_tile(Context *ctx, Trellis::Chip &chip, BelId bel)
+{
+    static const std::set<std::string> pioabcd_l = {"PICL1", "PICL1_DQS0", "PICL1_DQS3"};
+    static const std::set<std::string> pioabcd_r = {"PICR1", "PICR1_DQS0", "PICR1_DQS3"};
+    static const std::set<std::string> pioa_b = {"PICB0", "EFB0_PICB0", "EFB2_PICB0"};
+    static const std::set<std::string> piob_b = {"PICB1", "EFB1_PICB1", "EFB3_PICB1"};
+
+    std::string pio_name = ctx->locInfo(bel)->bel_data[bel.index].name.get();
+    if (bel.location.y == 0) {
+        if (pio_name == "PIOA") {
+            return chip.get_tile_by_position_and_type(0, bel.location.x, "PIOT0");
+        } else if (pio_name == "PIOB") {
+            return chip.get_tile_by_position_and_type(0, bel.location.x + 1, "PIOT1");
+        } else {
+            NPNR_ASSERT_FALSE("bad PIO location");
+        }
+    } else if (bel.location.y == ctx->chip_info->height - 1) {
+        if (pio_name == "PIOA") {
+            return chip.get_tile_by_position_and_type(bel.location.y, bel.location.x, pioa_b);
+        } else if (pio_name == "PIOB") {
+            return chip.get_tile_by_position_and_type(bel.location.y, bel.location.x + 1, piob_b);
+        } else {
+            NPNR_ASSERT_FALSE("bad PIO location");
+        }
+    } else if (bel.location.x == 0) {
+        return chip.get_tile_by_position_and_type(bel.location.y + 1, bel.location.x, pioabcd_l);
+    } else if (bel.location.x == ctx->chip_info->width - 1) {
+        return chip.get_tile_by_position_and_type(bel.location.y + 1, bel.location.x, pioabcd_r);
+    } else {
+        NPNR_ASSERT_FALSE("bad PIO location");
+    }
+}
+
+// Get the PIC tile corresponding to a PIO bel
+static std::string get_pic_tile(Context *ctx, Trellis::Chip &chip, BelId bel)
+{
+    static const std::set<std::string> picab_l = {"PICL0", "PICL0_DQS2"};
+    static const std::set<std::string> piccd_l = {"PICL2", "PICL2_DQS1", "MIB_CIB_LR"};
+    static const std::set<std::string> picab_r = {"PICR0", "PICR0_DQS2"};
+    static const std::set<std::string> piccd_r = {"PICR2", "PICR2_DQS1", "MIB_CIB_LR_A"};
+
+    static const std::set<std::string> pica_b = {"PICB0", "EFB0_PICB0", "EFB2_PICB0"};
+    static const std::set<std::string> picb_b = {"PICB1", "EFB1_PICB1", "EFB3_PICB1"};
+
+    std::string pio_name = ctx->locInfo(bel)->bel_data[bel.index].name.get();
+    if (bel.location.y == 0) {
+        if (pio_name == "PIOA") {
+            return chip.get_tile_by_position_and_type(1, bel.location.x, "PICT0");
+        } else if (pio_name == "PIOB") {
+            return chip.get_tile_by_position_and_type(1, bel.location.x + 1, "PICT1");
+        } else {
+            NPNR_ASSERT_FALSE("bad PIO location");
+        }
+    } else if (bel.location.y == ctx->chip_info->height - 1) {
+        if (pio_name == "PIOA") {
+            return chip.get_tile_by_position_and_type(bel.location.y, bel.location.x, pica_b);
+        } else if (pio_name == "PIOB") {
+            return chip.get_tile_by_position_and_type(bel.location.y, bel.location.x + 1, picb_b);
+        } else {
+            NPNR_ASSERT_FALSE("bad PIO location");
+        }
+    } else if (bel.location.x == 0) {
+        if (pio_name == "PIOA" || pio_name == "PIOB") {
+            return chip.get_tile_by_position_and_type(bel.location.y, bel.location.x, picab_l);
+        } else if (pio_name == "PIOC" || pio_name == "PIOD") {
+            return chip.get_tile_by_position_and_type(bel.location.y + 2, bel.location.x, piccd_l);
+        } else {
+            NPNR_ASSERT_FALSE("bad PIO location");
+        }
+    } else if (bel.location.x == ctx->chip_info->width - 1) {
+        if (pio_name == "PIOA" || pio_name == "PIOB") {
+            return chip.get_tile_by_position_and_type(bel.location.y, bel.location.x, picab_r);
+        } else if (pio_name == "PIOC" || pio_name == "PIOD") {
+            return chip.get_tile_by_position_and_type(bel.location.y + 2, bel.location.x, piccd_r);
+        } else {
+            NPNR_ASSERT_FALSE("bad PIO location");
+        }
+    } else {
+        NPNR_ASSERT_FALSE("bad PIO location");
+    }
+}
+
+void write_bitstream(Context *ctx, std::string base_config_file, std::string text_config_file,
+                     std::string bitstream_file)
+{
+    Trellis::Chip empty_chip(ctx->getChipName());
+    Trellis::ChipConfig cc;
+
+    std::set<std::string> cib_tiles = {"CIB", "CIB_LR", "CIB_LR_S", "CIB_EFB0", "CIB_EFB1"};
+
+    if (!base_config_file.empty()) {
+        std::ifstream config_file(base_config_file);
+        if (!config_file) {
+            log_error("failed to open base config file '%s'\n", base_config_file.c_str());
+        }
+        std::string str((std::istreambuf_iterator<char>(config_file)), std::istreambuf_iterator<char>());
+        cc = Trellis::ChipConfig::from_string(str);
+    } else {
+        cc.chip_name = ctx->getChipName();
+        // TODO: .bit metadata
+    }
+
+    // Add all set, configurable pips to the config
+    for (auto pip : ctx->getPips()) {
+        if (ctx->getBoundPipNet(pip) != IdString()) {
+            if (ctx->getPipType(pip) == 0) { // ignore fixed pips
+                std::string tile = empty_chip.get_tile_by_position_and_type(pip.location.y, pip.location.x,
+                                                                     ctx->getPipTiletype(pip));
+                std::string source = get_trellis_wirename(ctx, pip.location, ctx->getPipSrcWire(pip));
+                std::string sink = get_trellis_wirename(ctx, pip.location, ctx->getPipDstWire(pip));
+                cc.tiles[tile].add_arc(sink, source);
+            }
+        }
+    }
+
+    // Set all bankref tiles to 3.3V (TODO)
+    for (const auto &tile : empty_chip.tiles) {
+        std::string type = tile.second->info.type;
+        if (type.find("BANKREF") != std::string::npos && type != "BANKREF8") {
+            cc.tiles[tile.first].add_enum("BANK.VCCIO", "3V3");
+        }
+    }
+
+    // Configure slices
+    for (auto &cell : ctx->cells) {
+        CellInfo *ci = cell.second.get();
+        if (ci->bel == BelId()) {
+            log_warning("found unplaced cell '%s' during bitstream gen\n", ci->name.c_str(ctx));
+        }
+        BelId bel = ci->bel;
+        if (ci->type == ctx->id("TRELLIS_SLICE")) {
+            std::string tname = empty_chip.get_tile_by_position_and_type(bel.location.y, bel.location.x, "PLC2");
+            std::string slice = ctx->locInfo(bel)->bel_data[bel.index].name.get();
+            int lut0_init = int_or_default(ci->params, ctx->id("LUT0_INITVAL"));
+            int lut1_init = int_or_default(ci->params, ctx->id("LUT1_INITVAL"));
+            cc.tiles[tname].add_word(slice + ".K0.INIT", int_to_bitvector(lut0_init, 16));
+            cc.tiles[tname].add_word(slice + ".K1.INIT", int_to_bitvector(lut1_init, 16));
+            cc.tiles[tname].add_enum(slice + ".MODE", str_or_default(ci->params, ctx->id("MODE"), "LOGIC"));
+            cc.tiles[tname].add_enum(slice + ".GSR", str_or_default(ci->params, ctx->id("GSR"), "ENABLED"));
+            cc.tiles[tname].add_enum(slice + ".REG0.SD", str_or_default(ci->params, ctx->id("REG0_SD"), "0"));
+            cc.tiles[tname].add_enum(slice + ".REG1.SD", str_or_default(ci->params, ctx->id("REG1_SD"), "0"));
+            cc.tiles[tname].add_enum(slice + ".REG0.REGSET",
+                                     str_or_default(ci->params, ctx->id("REG0_REGSET"), "RESET"));
+            cc.tiles[tname].add_enum(slice + ".REG1.REGSET",
+                                     str_or_default(ci->params, ctx->id("REG1_REGSET"), "RESET"));
+            cc.tiles[tname].add_enum(slice + ".CEMUX", str_or_default(ci->params, ctx->id("CEMUX"), "1"));
+            // TODO: CLKMUX, CEMUX, carry
+        } else if (ci->type == ctx->id("TRELLIS_IO")) {
+            std::string pio = ctx->locInfo(bel)->bel_data[bel.index].name.get();
+            std::string iotype = str_or_default(ci->attrs, ctx->id("IO_TYPE"), "LVCMOS33");
+            std::string dir = str_or_default(ci->params, ctx->id("DIR"), "INPUT");
+            std::string pio_tile = get_pio_tile(ctx, empty_chip, bel);
+            std::string pic_tile = get_pic_tile(ctx, empty_chip, bel);
+            cc.tiles[pio_tile].add_enum(pio + ".BASE_TYPE", dir + "_" + iotype);
+            cc.tiles[pic_tile].add_enum(pio + ".BASE_TYPE", dir + "_" + iotype);
+            if (dir != "INPUT" && (ci->ports.find(ctx->id("T")) == ci->ports.end() || ci->ports.at(ctx->id("T")).net == nullptr)) {
+                // Tie tristate low if unconnected for outputs or bidir
+                std::string jpt = fmt_str("X" << bel.location.x << "/Y" << bel.location.y << "/JPADDT" << pio.back());
+                WireId jpt_wire = ctx->getWireByName(ctx->id(jpt));
+                PipId jpt_pip = *ctx->getPipsUphill(jpt_wire).begin();
+                WireId cib_wire = ctx->getPipSrcWire(jpt_pip);
+                std::string cib_tile = empty_chip.get_tile_by_position_and_type(cib_wire.location.y, cib_wire.location.x, cib_tiles);
+                std::string cib_wirename = ctx->locInfo(cib_wire)->wire_data[cib_wire.index].name.get();
+                cc.tiles[cib_tile].add_enum("CIB." + cib_wirename + "MUX", "0");
+            }
+            if (dir == "INPUT") {
+                cc.tiles[pio_tile].add_enum(pio + ".HYSTERESIS", "ON");
+            }
+        } else {
+            NPNR_ASSERT_FALSE("unsupported cell type");
+        }
+    }
+
+    // Configure chip
+    Trellis::Chip cfg_chip = cc.to_chip();
+    if (!bitstream_file.empty()) {
+        Trellis::Bitstream::serialise_chip(cfg_chip).write_bit_py(bitstream_file);
+    }
+    if (!text_config_file.empty()) {
+        std::ofstream out_config(text_config_file);
+        out_config << cc.to_string();
+    }
+}
+
+NEXTPNR_NAMESPACE_END
diff --git a/ecp5/bitstream.h b/ecp5/bitstream.h
new file mode 100644
index 00000000..62617470
--- /dev/null
+++ b/ecp5/bitstream.h
@@ -0,0 +1,32 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  David Shah <david@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#ifndef BITSTREAM_H
+#define BITSTREAM_H
+
+#include "nextpnr.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+void write_bitstream(Context *ctx, std::string base_config_file = "", std::string text_config_file = "",
+                     std::string bitstream_file = "");
+
+NEXTPNR_NAMESPACE_END
+
+#endif // BITSTREAM_H
diff --git a/ecp5/family.cmake b/ecp5/family.cmake
new file mode 100644
index 00000000..f58cdbb2
--- /dev/null
+++ b/ecp5/family.cmake
@@ -0,0 +1,49 @@
+
+set(devices 45k)
+
+set(DB_PY ${CMAKE_CURRENT_SOURCE_DIR}/ecp5/trellis_import.py)
+
+file(MAKE_DIRECTORY ecp5/chipdbs/)
+add_library(ecp5_chipdb OBJECT ecp5/chipdbs/)
+target_compile_definitions(ecp5_chipdb PRIVATE NEXTPNR_NAMESPACE=nextpnr_${family})
+target_include_directories(ecp5_chipdb PRIVATE ${family}/)
+set(ENV_CMD ${CMAKE_COMMAND} -E env "PYTHONPATH=${TRELLIS_ROOT}/libtrellis:${TRELLIS_ROOT}/util/common")
+if (MSVC)
+    target_sources(ecp5_chipdb PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/ecp5/resource/embed.cc)
+    set_source_files_properties(${CMAKE_CURRENT_SOURCE_DIR}/ecp5/resources/chipdb.rc PROPERTIES LANGUAGE RC)
+    foreach (dev ${devices})
+        set(DEV_CC_DB ${CMAKE_CURRENT_SOURCE_DIR}/ecp5/chipdbs/chipdb-${dev}.bin)
+        set(DEV_PORTS_INC ${CMAKE_CURRENT_SOURCE_DIR}/ecp5/portpins.inc)
+        add_custom_command(OUTPUT ${DEV_CC_DB}
+                COMMAND ${ENV_CMD} python3 ${DB_PY} -b -p ${DEV_PORTS_INC} ${dev} ${DEV_CC_DB}
+                DEPENDS ${DB_PY}
+                )
+        target_sources(ecp5_chipdb PRIVATE ${DEV_CC_DB})
+        set_source_files_properties(${DEV_CC_DB} PROPERTIES HEADER_FILE_ONLY TRUE)
+        foreach (target ${family_targets})
+            target_sources(${target} PRIVATE $<TARGET_OBJECTS:ecp5_chipdb> ${CMAKE_CURRENT_SOURCE_DIR}/ecp5/resource/chipdb.rc)
+        endforeach (target)
+    endforeach (dev)
+else()
+    target_compile_options(ecp5_chipdb PRIVATE -g0 -O0 -w)
+    foreach (dev ${devices})
+        set(DEV_CC_DB ${CMAKE_CURRENT_SOURCE_DIR}/ecp5/chipdbs/chipdb-${dev}.cc)
+        set(DEV_PORTS_INC ${CMAKE_CURRENT_SOURCE_DIR}/ecp5/portpins.inc)
+        add_custom_command(OUTPUT ${DEV_CC_DB}
+                COMMAND ${ENV_CMD} python3 ${DB_PY} -c -p ${DEV_PORTS_INC} ${dev} ${DEV_CC_DB}
+                DEPENDS ${DB_PY}
+                )
+        target_sources(ecp5_chipdb PRIVATE ${DEV_CC_DB})
+        foreach (target ${family_targets})
+            target_sources(${target} PRIVATE $<TARGET_OBJECTS:ecp5_chipdb>)
+        endforeach (target)
+    endforeach (dev)
+endif()
+
+find_library(TRELLIS_LIB trellis PATHS ${TRELLIS_ROOT}/libtrellis)
+
+foreach (target ${family_targets})
+    target_compile_definitions(${target} PRIVATE TRELLIS_ROOT="${TRELLIS_ROOT}")
+    target_include_directories(${target} PRIVATE ${TRELLIS_ROOT}/libtrellis/include)
+    target_link_libraries(${target} PRIVATE ${TRELLIS_LIB})
+endforeach (target)
diff --git a/ecp5/main.cc b/ecp5/main.cc
new file mode 100644
index 00000000..caa28563
--- /dev/null
+++ b/ecp5/main.cc
@@ -0,0 +1,202 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  Clifford Wolf <clifford@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#ifdef MAIN_EXECUTABLE
+
+#ifndef NO_GUI
+#include <QApplication>
+#include "application.h"
+#include "mainwindow.h"
+#endif
+#ifndef NO_PYTHON
+#include "pybindings.h"
+#endif
+#include <boost/filesystem/convenience.hpp>
+#include <boost/program_options.hpp>
+#include <fstream>
+#include <iostream>
+
+#include "Chip.hpp"
+#include "Database.hpp"
+#include "Tile.hpp"
+
+#include "log.h"
+#include "nextpnr.h"
+#include "version.h"
+
+#include "bitstream.h"
+#include "design_utils.h"
+#include "jsonparse.h"
+#include "pack.h"
+#include "place_sa.h"
+#include "route.h"
+#include "timing.h"
+
+USING_NEXTPNR_NAMESPACE
+
+int main(int argc, char *argv[])
+{
+    try {
+
+        namespace po = boost::program_options;
+        int rc = 0;
+
+        log_files.push_back(stdout);
+
+        po::options_description options("Allowed options");
+        options.add_options()("help,h", "show help");
+        options.add_options()("verbose,v", "verbose output");
+        options.add_options()("force,f", "keep running after errors");
+#ifndef NO_GUI
+        options.add_options()("gui", "start gui");
+#endif
+        options.add_options()("json", po::value<std::string>(), "JSON design file to ingest");
+        options.add_options()("seed", po::value<int>(), "seed value for random number generator");
+
+        options.add_options()("basecfg", po::value<std::string>(), "base chip configuration in Trellis text format");
+        options.add_options()("bit", po::value<std::string>(), "bitstream file to write");
+        options.add_options()("textcfg", po::value<std::string>(), "textual configuration in Trellis format to write");
+
+        po::positional_options_description pos;
+#ifndef NO_PYTHON
+        options.add_options()("run", po::value<std::vector<std::string>>(), "python file to execute");
+        pos.add("run", -1);
+#endif
+        options.add_options()("version,V", "show version");
+
+        po::variables_map vm;
+        try {
+            po::parsed_options parsed = po::command_line_parser(argc, argv).options(options).positional(pos).run();
+
+            po::store(parsed, vm);
+
+            po::notify(vm);
+        }
+
+        catch (std::exception &e) {
+            std::cout << e.what() << "\n";
+            return 1;
+        }
+
+        if (vm.count("help") || argc == 1) {
+            std::cout << boost::filesystem::basename(argv[0])
+                      << " -- Next Generation Place and Route (git "
+                         "sha1 " GIT_COMMIT_HASH_STR ")\n";
+            std::cout << "\n";
+            std::cout << options << "\n";
+            return argc != 1;
+        }
+
+        if (vm.count("version")) {
+            std::cout << boost::filesystem::basename(argv[0])
+                      << " -- Next Generation Place and Route (git "
+                         "sha1 " GIT_COMMIT_HASH_STR ")\n";
+            return 1;
+        }
+
+        Trellis::load_database(TRELLIS_ROOT "/database");
+
+        ArchArgs args;
+        args.type = ArchArgs::LFE5U_45F;
+        args.package = "CABGA381";
+        args.speed = 6;
+        Context ctx(args);
+
+        if (vm.count("verbose")) {
+            ctx.verbose = true;
+        }
+
+        if (vm.count("force")) {
+            ctx.force = true;
+        }
+
+        if (vm.count("seed")) {
+            ctx.rngseed(vm["seed"].as<int>());
+        }
+
+        if (vm.count("json")) {
+            std::string filename = vm["json"].as<std::string>();
+            std::ifstream f(filename);
+            if (!parse_json_file(f, filename, &ctx))
+                log_error("Loading design failed.\n");
+
+            if (!pack_design(&ctx) && !ctx.force)
+                log_error("Packing design failed.\n");
+            if (vm.count("freq"))
+                ctx.target_freq = vm["freq"].as<double>() * 1e6;
+            assign_budget(&ctx);
+            ctx.check();
+            print_utilisation(&ctx);
+            ctx.timing_driven = true;
+            if (vm.count("no-tmdriv"))
+                ctx.timing_driven = false;
+
+            if (!place_design_sa(&ctx) && !ctx.force)
+                log_error("Placing design failed.\n");
+            ctx.check();
+            if (!route_design(&ctx) && !ctx.force)
+                log_error("Routing design failed.\n");
+
+            std::string basecfg;
+            if (vm.count("basecfg"))
+                basecfg = vm["basecfg"].as<std::string>();
+
+            std::string bitstream;
+            if (vm.count("bit"))
+                bitstream = vm["bit"].as<std::string>();
+
+            std::string textcfg;
+            if (vm.count("textcfg"))
+                textcfg = vm["textcfg"].as<std::string>();
+            write_bitstream(&ctx, basecfg, textcfg, bitstream);
+        }
+
+#ifndef NO_PYTHON
+        if (vm.count("run")) {
+            init_python(argv[0], true);
+            python_export_global("ctx", ctx);
+
+            std::vector<std::string> files = vm["run"].as<std::vector<std::string>>();
+            for (auto filename : files)
+                execute_python_file(filename.c_str());
+
+            deinit_python();
+        }
+#endif
+
+#ifndef NO_GUI
+        if (vm.count("gui")) {
+            Application a(argc, argv);
+            MainWindow w;
+            w.show();
+
+            rc = a.exec();
+        }
+#endif
+        return rc;
+    } catch (log_execution_error_exception) {
+#if defined(_MSC_VER)
+        _exit(EXIT_FAILURE);
+#else
+        _Exit(EXIT_FAILURE);
+#endif
+    }
+}
+
+#endif
diff --git a/ecp5/pack.cc b/ecp5/pack.cc
new file mode 100644
index 00000000..7f54c231
--- /dev/null
+++ b/ecp5/pack.cc
@@ -0,0 +1,99 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  David Shah <david@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "pack.h"
+#include <algorithm>
+#include <iterator>
+#include <unordered_set>
+#include "design_utils.h"
+#include "log.h"
+#include "util.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+static bool is_nextpnr_iob(Context *ctx, CellInfo *cell)
+{
+    return cell->type == ctx->id("$nextpnr_ibuf") || cell->type == ctx->id("$nextpnr_obuf") ||
+           cell->type == ctx->id("$nextpnr_iobuf");
+}
+
+static bool is_trellis_io(const Context *ctx, const CellInfo *cell) { return cell->type == ctx->id("TRELLIS_IO"); }
+
+// Simple "packer" to remove nextpnr IOBUFs, this assumes IOBUFs are manually instantiated
+void pack_io(Context *ctx)
+{
+    std::unordered_set<IdString> packed_cells;
+    std::vector<std::unique_ptr<CellInfo>> new_cells;
+    log_info("Packing IOs..\n");
+
+    for (auto cell : sorted(ctx->cells)) {
+        CellInfo *ci = cell.second;
+        if (is_nextpnr_iob(ctx, ci)) {
+            CellInfo *trio = nullptr;
+            if (ci->type == ctx->id("$nextpnr_ibuf") || ci->type == ctx->id("$nextpnr_iobuf")) {
+                trio = net_only_drives(ctx, ci->ports.at(ctx->id("O")).net, is_trellis_io, ctx->id("B"), true, ci);
+
+            } else if (ci->type == ctx->id("$nextpnr_obuf")) {
+                trio = net_only_drives(ctx, ci->ports.at(ctx->id("I")).net, is_trellis_io, ctx->id("B"), true, ci);
+            }
+            if (trio != nullptr) {
+                // Trivial case, TRELLIS_IO used. Just destroy the net and the
+                // iobuf
+                log_info("%s feeds TRELLIS_IO %s, removing %s %s.\n", ci->name.c_str(ctx), trio->name.c_str(ctx),
+                         ci->type.c_str(ctx), ci->name.c_str(ctx));
+                NetInfo *net = trio->ports.at(ctx->id("B")).net;
+                if (net != nullptr) {
+                    ctx->nets.erase(net->name);
+                    trio->ports.at(ctx->id("B")).net = nullptr;
+                }
+                if (ci->type == ctx->id("$nextpnr_iobuf")) {
+                    NetInfo *net2 = ci->ports.at(ctx->id("I")).net;
+                    if (net2 != nullptr) {
+                        ctx->nets.erase(net2->name);
+                    }
+                }
+            } else {
+                log_error("TRELLIS_IO required on all top level IOs...\n");
+            }
+            packed_cells.insert(ci->name);
+            std::copy(ci->attrs.begin(), ci->attrs.end(), std::inserter(trio->attrs, trio->attrs.begin()));
+        }
+    }
+    for (auto pcell : packed_cells) {
+        ctx->cells.erase(pcell);
+    }
+    for (auto &ncell : new_cells) {
+        ctx->cells[ncell->name] = std::move(ncell);
+    }
+}
+
+// Main pack function
+bool pack_design(Context *ctx)
+{
+    try {
+        log_break();
+        pack_io(ctx);
+        log_info("Checksum: 0x%08x\n", ctx->checksum());
+        return true;
+    } catch (log_execution_error_exception) {
+        return false;
+    }
+}
+
+NEXTPNR_NAMESPACE_END
diff --git a/ecp5/pack.h b/ecp5/pack.h
new file mode 100644
index 00000000..cc051a41
--- /dev/null
+++ b/ecp5/pack.h
@@ -0,0 +1,31 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  David Shah <david@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#ifndef PACK_H
+#define PACK_H
+
+#include "nextpnr.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+bool pack_design(Context *ctx);
+
+NEXTPNR_NAMESPACE_END
+
+#endif // ROUTE_H
diff --git a/ecp5/place_legaliser.cc b/ecp5/place_legaliser.cc
new file mode 100644
index 00000000..0d23f15b
--- /dev/null
+++ b/ecp5/place_legaliser.cc
@@ -0,0 +1,26 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  David Shah <david@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "place_legaliser.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+bool legalise_design(Context *ctx) { return true; }
+
+NEXTPNR_NAMESPACE_END
diff --git a/ecp5/place_legaliser.h b/ecp5/place_legaliser.h
new file mode 100644
index 00000000..5f4df6aa
--- /dev/null
+++ b/ecp5/place_legaliser.h
@@ -0,0 +1,31 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  David Shah <david@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#ifndef PLACE_LEGALISER_H
+#define PLACE_LEGALISER_H
+
+#include "nextpnr.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+bool legalise_design(Context *ctx);
+
+NEXTPNR_NAMESPACE_END
+
+#endif
diff --git a/ecp5/portpins.inc b/ecp5/portpins.inc
new file mode 100644
index 00000000..cfe0a349
--- /dev/null
+++ b/ecp5/portpins.inc
@@ -0,0 +1,28 @@
+X(A0)
+X(B0)
+X(C0)
+X(D0)
+X(A1)
+X(B1)
+X(C1)
+X(D1)
+X(M0)
+X(M1)
+X(FCI)
+X(FXA)
+X(FXB)
+X(CLK)
+X(LSR)
+X(CE)
+X(F0)
+X(Q0)
+X(F1)
+X(Q1)
+X(FCO)
+X(OFX0)
+X(OFX1)
+
+X(I)
+X(O)
+X(T)
+X(B)
diff --git a/ecp5/synth/.gitignore b/ecp5/synth/.gitignore
new file mode 100644
index 00000000..5b3bf578
--- /dev/null
+++ b/ecp5/synth/.gitignore
@@ -0,0 +1 @@
+*.bit
diff --git a/ecp5/synth/blinky.v b/ecp5/synth/blinky.v
new file mode 100644
index 00000000..ac7c6ea3
--- /dev/null
+++ b/ecp5/synth/blinky.v
@@ -0,0 +1,77 @@
+module top(input clk_pin, input btn_pin, output [3:0] led_pin, output gpio0_pin);
+
+	wire clk;
+	wire [7:0] led;
+    wire btn;
+    wire gpio0;
+
+	(* BEL="X0/Y35/PIOA" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("INPUT")) clk_buf (.B(clk_pin), .O(clk));
+
+	(* BEL="X4/Y71/PIOA" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("INPUT")) btn_buf (.B(btn_pin), .O(btn));
+
+	(* BEL="X0/Y23/PIOC" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("OUTPUT")) led_buf_0 (.B(led_pin[0]), .I(led[0]));
+	(* BEL="X0/Y23/PIOD" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("OUTPUT")) led_buf_1 (.B(led_pin[1]), .I(led[1]));
+	(* BEL="X0/Y26/PIOA" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("OUTPUT")) led_buf_2 (.B(led_pin[2]), .I(led[2]));
+    (* BEL="X0/Y26/PIOC" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("OUTPUT")) led_buf_3 (.B(led_pin[3]), .I(led[3]));
+
+	(* BEL="X0/Y26/PIOB" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("OUTPUT")) led_buf_4 (.B(led_pin[4]), .I(led[4]));
+	(* BEL="X0/Y32/PIOD" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("OUTPUT")) led_buf_5 (.B(led_pin[5]), .I(led[5]));
+	(* BEL="X0/Y26/PIOD" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("OUTPUT")) led_buf_6 (.B(led_pin[6]), .I(led[6]));
+    (* BEL="X0/Y29/PIOD" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("OUTPUT")) led_buf_7 (.B(led_pin[7]), .I(led[7]));
+
+
+	(* BEL="X0/Y62/PIOD" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("OUTPUT")) gpio0_buf (.B(gpio0_pin), .I(gpio0));
+
+    localparam ctr_width = 24;
+    localparam ctr_max = 2**ctr_width - 1;
+	reg [ctr_width-1:0] ctr = 0;
+	reg [9:0] pwm_ctr = 0;
+    reg dir = 0;
+
+	always@(posedge clk) begin
+		ctr <= btn ? ctr : (dir ? ctr - 1'b1 : ctr + 1'b1);
+        if (ctr[ctr_width-1 : ctr_width-3] == 0 && dir == 1)
+            dir <= 1'b0;
+        else if (ctr[ctr_width-1 : ctr_width-3] == 7 && dir == 0)
+            dir <= 1'b1;
+        pwm_ctr <= pwm_ctr + 1'b1;
+    end
+
+    reg [9:0] brightness [0:7];
+    localparam bright_max = 2**10 - 1;
+    reg [7:0] led_reg;
+
+    genvar i;
+    generate
+    for (i = 0; i < 8; i=i+1) begin
+       always @ (posedge clk) begin
+            if (ctr[ctr_width-1 : ctr_width-3] == i)
+                brightness[i] <= bright_max;
+            else if (ctr[ctr_width-1 : ctr_width-3] == (i - 1))
+                brightness[i] <= ctr[ctr_width-4:ctr_width-13];
+             else if (ctr[ctr_width-1 : ctr_width-3] == (i + 1))
+                 brightness[i] <= bright_max - ctr[ctr_width-4:ctr_width-13];
+            else
+                brightness[i] <= 0;
+            led_reg[i] <= pwm_ctr < brightness[i];
+       end
+    end
+    endgenerate
+
+    assign led = led_reg;
+
+    // Tie GPIO0, keep board from rebooting
+    TRELLIS_SLICE #(.MODE("LOGIC"), .LUT0_INITVAL(16'hFFFF)) vcc (.F0(gpio0));
+
+endmodule
diff --git a/ecp5/synth/blinky.ys b/ecp5/synth/blinky.ys
new file mode 100644
index 00000000..c0b74636
--- /dev/null
+++ b/ecp5/synth/blinky.ys
@@ -0,0 +1,9 @@
+read_verilog blinky.v
+read_verilog -lib cells.v
+synth -top top
+abc -lut 4
+techmap -map simple_map.v
+splitnets
+opt_clean
+stat
+write_json blinky.json
diff --git a/ecp5/synth/cells.v b/ecp5/synth/cells.v
new file mode 100644
index 00000000..d2c6d560
--- /dev/null
+++ b/ecp5/synth/cells.v
@@ -0,0 +1,39 @@
+(* blackbox *)
+module TRELLIS_SLICE(
+	input A0, B0, C0, D0,
+	input A1, B1, C1, D1,
+	input M0, M1,
+	input FCI, FXA, FXB,
+	input CLK, LSR, CE,
+	output F0, Q0,
+	output F1, Q1,
+	output FCO, OFX0, OFX1
+);
+
+parameter MODE = "LOGIC";
+parameter GSR = "ENABLED";
+parameter SRMODE = "LSR_OVER_CE";
+parameter CEMUX = "1";
+parameter CLKMUX = "CLK";
+parameter LSRMUX = "LSR";
+parameter LUT0_INITVAL = 16'h0000;
+parameter LUT1_INITVAL = 16'h0000;
+parameter REG0_SD = "0";
+parameter REG1_SD = "0";
+parameter REG0_REGSET = "RESET";
+parameter REG1_REGSET = "RESET";
+parameter CCU2_INJECT1_0 = "NO";
+parameter CCU2_INJECT1_1 = "NO";
+
+endmodule
+
+(* blackbox *) (* keep *)
+module TRELLIS_IO(
+	inout B,
+	input I,
+	input T,
+	output O,
+);
+parameter DIR = "INPUT";
+
+endmodule
diff --git a/ecp5/synth/simple_map.v b/ecp5/synth/simple_map.v
new file mode 100644
index 00000000..550fa92c
--- /dev/null
+++ b/ecp5/synth/simple_map.v
@@ -0,0 +1,68 @@
+module \$_DFF_P_ (input D, C, output Q);
+	TRELLIS_SLICE #(
+		.MODE("LOGIC"),
+		.CLKMUX("CLK"),
+		.CEMUX("1"),
+		.REG0_SD("0"),
+		.REG0_REGSET("RESET"),
+		.SRMODE("LSR_OVER_CE"),
+		.GSR("DISABLED")
+	) _TECHMAP_REPLACE_ (
+		.CLK(C),
+		.M0(D),
+		.Q0(Q)
+	);
+endmodule
+
+module \$lut (A, Y);
+	parameter WIDTH = 0;
+	parameter LUT = 0;
+
+	input [WIDTH-1:0] A;
+	output Y;
+
+	generate
+		if (WIDTH == 1) begin
+			TRELLIS_SLICE #(
+				.MODE("LOGIC"),
+				.LUT0_INITVAL({8{LUT[1:0]}})
+			) _TECHMAP_REPLACE_ (
+				.A0(A[0]),
+				.F0(Y)
+			);
+		end
+		if (WIDTH == 2) begin
+			TRELLIS_SLICE #(
+				.MODE("LOGIC"),
+				.LUT0_INITVAL({4{LUT[3:0]}})
+			) _TECHMAP_REPLACE_ (
+				.A0(A[0]),
+				.B0(A[1]),
+				.F0(Y)
+			);
+		end
+		if (WIDTH == 3) begin
+			TRELLIS_SLICE #(
+				.MODE("LOGIC"),
+				.LUT0_INITVAL({2{LUT[7:0]}})
+			) _TECHMAP_REPLACE_ (
+				.A0(A[0]),
+				.B0(A[1]),
+				.C0(A[2]),
+				.F0(Y)
+			);
+		end
+		if (WIDTH == 4) begin
+			TRELLIS_SLICE #(
+				.MODE("LOGIC"),
+				.LUT0_INITVAL(LUT)
+			) _TECHMAP_REPLACE_ (
+				.A0(A[0]),
+				.B0(A[1]),
+				.C0(A[2]),
+				.D0(A[3]),
+				.F0(Y)
+			);
+		end
+	endgenerate
+endmodule
diff --git a/ecp5/synth/ulx3s.v b/ecp5/synth/ulx3s.v
new file mode 100644
index 00000000..08f6e65b
--- /dev/null
+++ b/ecp5/synth/ulx3s.v
@@ -0,0 +1,18 @@
+module top(input a_pin, output led_pin, output led2_pin, output gpio0_pin);
+
+	wire a;
+	wire led, led2;
+    wire gpio0;
+	(* BEL="X4/Y71/PIOA" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("INPUT")) a_buf (.B(a_pin), .O(a));
+	(* BEL="X0/Y23/PIOC" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("OUTPUT")) led_buf (.B(led_pin), .I(led));
+    (* BEL="X0/Y26/PIOA" *) (* IO_TYPE="LVCMOS33" *)
+    TRELLIS_IO #(.DIR("OUTPUT")) led2_buf (.B(led2_pin), .I(led2));
+	(* BEL="X0/Y62/PIOD" *) (* IO_TYPE="LVCMOS33" *)
+	TRELLIS_IO #(.DIR("OUTPUT")) gpio0_buf (.B(gpio0_pin), .I(gpio0));
+    assign led = a;
+    assign led2 = !a;
+
+    TRELLIS_SLICE #(.MODE("LOGIC"), .LUT0_INITVAL(16'hFFFF)) vcc (.F0(gpio0));
+endmodule
diff --git a/ecp5/synth/ulx3s.ys b/ecp5/synth/ulx3s.ys
new file mode 100644
index 00000000..d741c985
--- /dev/null
+++ b/ecp5/synth/ulx3s.ys
@@ -0,0 +1,9 @@
+read_verilog ulx3s.v
+read_verilog -lib cells.v
+synth -top top
+abc -lut 4
+techmap -map simple_map.v
+splitnets
+opt_clean
+stat
+write_json ulx3s.json
diff --git a/ecp5/synth/ulx3s_empty.config b/ecp5/synth/ulx3s_empty.config
new file mode 100644
index 00000000..815e7f0d
--- /dev/null
+++ b/ecp5/synth/ulx3s_empty.config
@@ -0,0 +1,439 @@
+.device LFE5U-45F
+
+.tile CIB_R10C3:PVT_COUNT2
+unknown: F2B0
+unknown: F3B0
+unknown: F5B0
+unknown: F11B0
+unknown: F13B0
+
+.tile CIB_R5C1:CIB_PLL1
+enum: CIB.JA3MUX 0
+enum: CIB.JB3MUX 0
+
+
+.tile CIB_R5C89:CIB_PLL1
+enum: CIB.JA3MUX 0
+enum: CIB.JB3MUX 0
+
+
+.tile CIB_R70C3:CIB_PLL3
+enum: CIB.JA3MUX 0
+enum: CIB.JB3MUX 0
+
+
+.tile CIB_R70C42:VCIB_DCU0
+enum: CIB.JA1MUX 0
+enum: CIB.JA3MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC2MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C43:VCIB_DCUA
+enum: CIB.JA1MUX 0
+enum: CIB.JA3MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC2MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C44:VCIB_DCUB
+enum: CIB.JA1MUX 0
+enum: CIB.JA3MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC2MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C45:VCIB_DCUC
+enum: CIB.JA1MUX 0
+enum: CIB.JA3MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC2MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C46:VCIB_DCUD
+enum: CIB.JA1MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC2MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C47:VCIB_DCUF
+enum: CIB.JA1MUX 0
+enum: CIB.JA3MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC2MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C48:VCIB_DCU3
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C49:VCIB_DCU2
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C50:VCIB_DCUG
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C51:VCIB_DCUH
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C52:VCIB_DCUI
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C53:VCIB_DCU1
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+
+
+.tile CIB_R70C69:VCIB_DCU0
+enum: CIB.JA1MUX 0
+enum: CIB.JA3MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC2MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C6:CIB_EFB0
+enum: CIB.JB3MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C70:VCIB_DCUA
+enum: CIB.JA1MUX 0
+enum: CIB.JA3MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC2MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C71:VCIB_DCUB
+enum: CIB.JA1MUX 0
+enum: CIB.JA3MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC2MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C72:VCIB_DCUC
+enum: CIB.JA1MUX 0
+enum: CIB.JA3MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC2MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C73:VCIB_DCUD
+enum: CIB.JA1MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC2MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C74:VCIB_DCUF
+enum: CIB.JA1MUX 0
+enum: CIB.JA3MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC2MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C75:VCIB_DCU3
+enum: CIB.JA5MUX 0
+enum: CIB.JA7MUX 0
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JC0MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC6MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C76:VCIB_DCU2
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C77:VCIB_DCUG
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C78:VCIB_DCUH
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C79:VCIB_DCUI
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB7MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD6MUX 0
+
+
+.tile CIB_R70C7:CIB_EFB1
+enum: CIB.JA3MUX 0
+enum: CIB.JA4MUX 0
+enum: CIB.JA5MUX 0
+enum: CIB.JA6MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB4MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JB6MUX 0
+enum: CIB.JC3MUX 0
+enum: CIB.JC4MUX 0
+enum: CIB.JC5MUX 0
+enum: CIB.JD3MUX 0
+enum: CIB.JD4MUX 0
+enum: CIB.JD5MUX 0
+
+
+.tile CIB_R70C80:VCIB_DCU1
+enum: CIB.JB1MUX 0
+enum: CIB.JB3MUX 0
+enum: CIB.JB5MUX 0
+enum: CIB.JD0MUX 0
+enum: CIB.JD2MUX 0
+
+
+.tile CIB_R70C87:CIB_PLL3
+enum: CIB.JA3MUX 0
+enum: CIB.JB3MUX 0
+
+
+.tile MIB_R10C40:CMUX_UL_0
+arc: G_DCS0CLK0 G_VPFN0000
+
+
+.tile MIB_R10C41:CMUX_UR_0
+arc: G_DCS0CLK1 G_VPFN0000
+
+
+.tile MIB_R58C40:CMUX_LL_0
+arc: G_DCS1CLK0 G_VPFN0000
+
+
+.tile MIB_R58C41:CMUX_LR_0
+arc: G_DCS1CLK1 G_VPFN0000
+
+
+.tile MIB_R71C4:EFB0_PICB0
+unknown: F54B1
+unknown: F56B1
+unknown: F82B1
+unknown: F94B1
+
+.tile MIB_R71C3:BANKREF8
+unknown: F18B0
+
diff --git a/ecp5/synth/wire.v b/ecp5/synth/wire.v
new file mode 100644
index 00000000..2af68ed2
--- /dev/null
+++ b/ecp5/synth/wire.v
@@ -0,0 +1,11 @@
+module top(input a_pin, output [3:0] led_pin);
+
+	wire a;
+	wire [3:0] led;
+
+	TRELLIS_IO #(.DIR("INPUT")) a_buf (.B(a_pin), .O(a));
+	TRELLIS_IO #(.DIR("OUTPUT")) led_buf [3:0] (.B(led_pin), .I(led));
+
+    //assign led[0] = !a;
+    always @(posedge a) led[0] <= !led[0];
+endmodule
diff --git a/ecp5/synth/wire.ys b/ecp5/synth/wire.ys
new file mode 100644
index 00000000..f916588b
--- /dev/null
+++ b/ecp5/synth/wire.ys
@@ -0,0 +1,9 @@
+read_verilog wire.v
+read_verilog -lib cells.v
+synth -top top
+abc -lut 4
+techmap -map simple_map.v
+splitnets
+opt_clean
+stat
+write_json wire.json
diff --git a/ecp5/trellis_import.py b/ecp5/trellis_import.py
new file mode 100755
index 00000000..60e48844
--- /dev/null
+++ b/ecp5/trellis_import.py
@@ -0,0 +1,672 @@
+#!/usr/bin/env python3
+import pytrellis
+import database
+import argparse
+
+location_types = dict()
+type_at_location = dict()
+tiletype_names = dict()
+
+parser = argparse.ArgumentParser(description="import ECP5 routing and bels from Project Trellis")
+group = parser.add_mutually_exclusive_group()
+group.add_argument("-b", "--binary", action="store_true")
+group.add_argument("-c", "--c_file", action="store_true")
+parser.add_argument("device", type=str, help="target device")
+parser.add_argument("outfile", type=argparse.FileType('w'), help="output filename")
+parser.add_argument("-p", "--portspins", type=str, help="path to portpins.inc")
+args = parser.parse_args()
+
+
+def is_global(loc):
+    return loc.x == -2 and loc.y == -2
+
+
+# Get the index for a tiletype
+def get_tiletype_index(name):
+    if name in tiletype_names:
+        return tiletype_names[name]
+    idx = len(tiletype_names)
+    tiletype_names[name] = idx
+    return idx
+
+
+portpins = dict()
+
+loc_wire_indices = dict()
+loc_wires = dict()
+
+loc_bels = dict()
+wire_bel_pins_uphill = dict()
+wire_bel_pins_downhill = dict()
+
+
+# Import all wire names at all locations
+def import_location_wires(rg, x, y):
+    loc_wire_indices[x, y] = dict()
+    loc_wires[x, y] = list()
+    wire_bel_pins_uphill[x, y] = list()
+    wire_bel_pins_downhill[x, y] = list()
+    rtile = rg.tiles[pytrellis.Location(x, y)]
+    for wire in rtile.wires:
+        name = rg.to_str(wire.key())
+        idx = len(loc_wires[x, y])
+        loc_wires[x, y].append(name)
+        loc_wire_indices[x, y][name] = idx
+        wire_bel_pins_uphill[x, y].append([])
+        wire_bel_pins_downhill[x, y].append([])
+
+
+# Take a RoutingId from Trellis and make into a (relx, rely, name) tuple
+def resolve_wirename(rg, rid, cur_x, cur_y):
+    if is_global(rid.loc):
+        return (cur_x, cur_y, rg.to_str(rid.id))
+    else:
+        x = rid.loc.x
+        y = rid.loc.y
+        widx = loc_wire_indices[x, y][rg.to_str(rid.id)]
+        return (x - cur_x, y - cur_y, widx)
+
+
+loc_arc_indices = dict()  # Map RoutingId index to nextpnr index
+loc_arcs = dict()
+
+
+# Import all arc indices at a location
+def index_location_arcs(rg, x, y):
+    loc_arc_indices[x, y] = dict()
+    loc_arcs[x, y] = list()
+    rtile = rg.tiles[pytrellis.Location(x, y)]
+    for arc in rtile.arcs:
+        idx = len(loc_arcs[x, y])
+        trid = arc.key()
+        loc_arcs[x, y].append(trid)
+        loc_arc_indices[x, y][trid] = idx
+
+
+def add_bel_input(bel_x, bel_y, bel_idx, bel_pin, wire_x, wire_y, wire_name):
+    bel_pin = portpins[bel_pin]
+    loc_bels[bel_x, bel_y][bel_idx][2].append((bel_pin, (wire_x, wire_y, loc_wire_indices[wire_x, wire_y][wire_name])))
+    wire_bel_pins_downhill[wire_x, wire_y][loc_wire_indices[wire_x, wire_y][wire_name]].append((
+        (bel_x, bel_y, bel_idx), bel_pin))
+
+
+def add_bel_output(bel_x, bel_y, bel_idx, bel_pin, wire_x, wire_y, wire_name):
+    bel_pin = portpins[bel_pin]
+    loc_bels[bel_x, bel_y][bel_idx][2].append((bel_pin, (wire_x, wire_y, loc_wire_indices[wire_x, wire_y][wire_name])))
+    wire_bel_pins_uphill[wire_x, wire_y][loc_wire_indices[wire_x, wire_y][wire_name]].append((
+        (bel_x, bel_y, bel_idx), bel_pin))
+
+
+def add_slice(x, y, z):
+    idx = len(loc_bels[x, y])
+    l = ("A", "B", "C", "D")[z]
+    name = "SLICE" + l
+    loc_bels[x, y].append((name, "SLICE", []))
+    lc0 = z * 2
+    lc1 = z * 2 + 1
+    add_bel_input(x, y, idx, "A0", x, y, "A{}_SLICE".format(lc0))
+    add_bel_input(x, y, idx, "B0", x, y, "B{}_SLICE".format(lc0))
+    add_bel_input(x, y, idx, "C0", x, y, "C{}_SLICE".format(lc0))
+    add_bel_input(x, y, idx, "D0", x, y, "D{}_SLICE".format(lc0))
+    add_bel_input(x, y, idx, "M0", x, y, "M{}_SLICE".format(lc0))
+
+    add_bel_input(x, y, idx, "A1", x, y, "A{}_SLICE".format(lc1))
+    add_bel_input(x, y, idx, "B1", x, y, "B{}_SLICE".format(lc1))
+    add_bel_input(x, y, idx, "C1", x, y, "C{}_SLICE".format(lc1))
+    add_bel_input(x, y, idx, "D1", x, y, "D{}_SLICE".format(lc1))
+    add_bel_input(x, y, idx, "M1", x, y, "M{}_SLICE".format(lc1))
+
+    add_bel_input(x, y, idx, "FCI", x, y, "FCI{}_SLICE".format(l if z > 0 else ""))
+    add_bel_input(x, y, idx, "FXA", x, y, "FXA{}_SLICE".format(l))
+    add_bel_input(x, y, idx, "FXB", x, y, "FXB{}_SLICE".format(l))
+
+    add_bel_input(x, y, idx, "CLK", x, y, "CLK{}_SLICE".format(z))
+    add_bel_input(x, y, idx, "LSR", x, y, "LSR{}_SLICE".format(z))
+    add_bel_input(x, y, idx, "CE", x, y, "CE{}_SLICE".format(z))
+
+    add_bel_output(x, y, idx, "F0", x, y, "F{}_SLICE".format(lc0))
+    add_bel_output(x, y, idx, "Q0", x, y, "Q{}_SLICE".format(lc0))
+
+    add_bel_output(x, y, idx, "F1", x, y, "F{}_SLICE".format(lc1))
+    add_bel_output(x, y, idx, "Q1", x, y, "Q{}_SLICE".format(lc1))
+
+    add_bel_output(x, y, idx, "FCO", x, y, "FCO{}_SLICE".format(l if z < 3 else ""))
+
+
+def add_pio(x, y, z):
+    idx = len(loc_bels[x, y])
+    l = ("A", "B", "C", "D")[z]
+    name = "PIO" + l
+    loc_bels[x, y].append((name, "PIO", []))
+    add_bel_input(x, y, idx, "I", x, y, "PADDO{}_PIO".format(l))
+    add_bel_input(x, y, idx, "T", x, y, "PADDT{}_PIO".format(l))
+    add_bel_output(x, y, idx, "O", x, y, "JPADDI{}_PIO".format(l))
+
+
+def add_bels(chip, x, y):
+    loc_bels[x, y] = []
+    tiles = chip.get_tiles_by_position(y, x)
+    num_slices = 0
+    num_pios = 0
+    for tile in tiles:
+        tt = tile.info.type
+        if tt == "PLC2":
+            num_slices = 4
+        elif "PICL0" in tt or "PICR0" in tt:
+            num_pios = 4
+        elif "PIOT0" in tt or ("PICB0" in tt and "SPICB" not in tt):
+            num_pios = 2
+    for i in range(num_slices):
+        add_slice(x, y, i)
+    for i in range(num_pios):
+        add_pio(x, y, i)
+
+
+# Import a location, deduplicating if appropriate
+def import_location(rg, x, y):
+    rtile = rg.tiles[pytrellis.Location(x, y)]
+    arcs = []  # (src, dst, configurable, tiletype)
+    wires = []  # (name, uphill, downhill, belpin_uphill, belpins_downhill)
+    bels = []  # (name, [(pin, wire)])
+    for name in loc_wires[x, y]:
+        w = rtile.wires[rg.ident(name)]
+        arcs_uphill = []
+        arcs_downhill = []
+        belpins_uphill = []
+        belpins_downhill = []
+        for uh in w.uphill:
+            arcidx = loc_arc_indices[uh.loc.x, uh.loc.y][uh.id]
+            arcs_uphill.append((uh.loc.x - x, uh.loc.y - y, arcidx))
+        for dh in w.downhill:
+            arcidx = loc_arc_indices[dh.loc.x, dh.loc.y][dh.id]
+            arcs_downhill.append((dh.loc.x - x, dh.loc.y - y, arcidx))
+        for bp in wire_bel_pins_uphill[x, y][loc_wire_indices[x, y][name]]:
+            bel, pin = bp
+            bel_x, bel_y, bel_idx = bel
+            belpins_uphill.append(((bel_x - x, bel_y - y, bel_idx), pin))
+        for bp in wire_bel_pins_downhill[x, y][loc_wire_indices[x, y][name]]:
+            bel, pin = bp
+            bel_x, bel_y, bel_idx = bel
+            belpins_downhill.append(((bel_x - x, bel_y - y, bel_idx), pin))
+        assert len(belpins_uphill) <= 1
+        wires.append((name, tuple(arcs_downhill), tuple(arcs_uphill), tuple(belpins_uphill), tuple(belpins_downhill)))
+
+    for bel in loc_bels[x, y]:
+        name, beltype, pins = bel
+        xformed_pins = tuple((p[0], (p[1][0] - x, p[1][1] - y, p[1][2])) for p in pins)
+        bels.append((name, beltype, xformed_pins))
+
+    for arcidx in loc_arcs[x, y]:
+        a = rtile.arcs[arcidx]
+        source_wire = resolve_wirename(rg, a.source, x, y)
+        dest_wire = resolve_wirename(rg, a.sink, x, y)
+        arcs.append((source_wire, dest_wire, a.configurable, get_tiletype_index(rg.to_str(a.tiletype))))
+
+    tile_data = (tuple(wires), tuple(arcs), tuple(bels))
+    if tile_data in location_types:
+        type_at_location[x, y] = location_types[tile_data]
+    else:
+        idx = len(location_types)
+        location_types[tile_data] = idx
+        type_at_location[x, y] = idx
+
+
+class BinaryBlobAssembler:
+    def __init__(self, cname, endianness, nodebug=False):
+        assert endianness in ["le", "be"]
+        self.cname = cname
+        self.endianness = endianness
+        self.finalized = False
+        self.data = bytearray()
+        self.comments = dict()
+        self.labels = dict()
+        self.exports = set()
+        self.labels_byaddr = dict()
+        self.ltypes_byaddr = dict()
+        self.strings = dict()
+        self.refs = dict()
+        self.nodebug = nodebug
+
+    def l(self, name, ltype=None, export=False):
+        assert not self.finalized
+        assert name not in self.labels
+        assert len(self.data) not in self.labels_byaddr
+        self.labels[name] = len(self.data)
+        if ltype is not None:
+            self.ltypes_byaddr[len(self.data)] = ltype
+        self.labels_byaddr[len(self.data)] = name
+        if export:
+            assert ltype is not None
+            self.exports.add(len(self.data))
+
+    def r(self, name, comment):
+        assert not self.finalized
+        assert len(self.data) % 4 == 0
+        assert len(self.data) not in self.refs
+        if self.nodebug:
+            comment = None
+        if name is not None:
+            self.refs[len(self.data)] = (name, comment)
+        self.data.append(0)
+        self.data.append(0)
+        self.data.append(0)
+        self.data.append(0)
+        if (name is None) and (comment is not None):
+            self.comments[len(self.data)] = comment + " (null reference)"
+
+    def s(self, s, comment):
+        assert not self.finalized
+        if self.nodebug:
+            comment = None
+        if s not in self.strings:
+            index = len(self.strings)
+            self.strings[s] = index
+        else:
+            index = self.strings[s]
+        if comment is not None:
+            self.r("str%d" % index, '%s: "%s"' % (comment, s))
+        else:
+            self.r("str%d" % index, None)
+
+    def u8(self, v, comment):
+        assert not self.finalized
+        if self.nodebug:
+            comment = None
+        self.data.append(v)
+        if comment is not None:
+            self.comments[len(self.data)] = comment
+
+    def u16(self, v, comment):
+        assert not self.finalized
+        assert len(self.data) % 2 == 0
+        if self.nodebug:
+            comment = None
+        if self.endianness == "le":
+            self.data.append(v & 255)
+            self.data.append((v >> 8) & 255)
+        elif self.endianness == "be":
+            self.data.append((v >> 8) & 255)
+            self.data.append(v & 255)
+        else:
+            assert 0
+        if comment is not None:
+            self.comments[len(self.data)] = comment
+
+    def s16(self, v, comment):
+        assert not self.finalized
+        assert len(self.data) % 2 == 0
+        if self.nodebug:
+            comment = None
+        c2val = (((-v) ^ 0xffff) + 1) if v < 0 else v
+        if self.endianness == "le":
+            self.data.append(c2val & 255)
+            self.data.append((c2val >> 8) & 255)
+        elif self.endianness == "be":
+            self.data.append((c2val >> 8) & 255)
+            self.data.append(c2val & 255)
+        else:
+            assert 0
+        if comment is not None:
+            self.comments[len(self.data)] = comment
+
+    def u32(self, v, comment):
+        assert not self.finalized
+        assert len(self.data) % 4 == 0
+        if self.nodebug:
+            comment = None
+        if self.endianness == "le":
+            self.data.append(v & 255)
+            self.data.append((v >> 8) & 255)
+            self.data.append((v >> 16) & 255)
+            self.data.append((v >> 24) & 255)
+        elif self.endianness == "be":
+            self.data.append((v >> 24) & 255)
+            self.data.append((v >> 16) & 255)
+            self.data.append((v >> 8) & 255)
+            self.data.append(v & 255)
+        else:
+            assert 0
+        if comment is not None:
+            self.comments[len(self.data)] = comment
+
+    def finalize(self):
+        assert not self.finalized
+        for s, index in self.strings.items():
+            self.l("str%d" % index, "char")
+            for c in s:
+                self.data.append(ord(c))
+            self.data.append(0)
+        self.finalized = True
+        cursor = 0
+        while cursor < len(self.data):
+            if cursor in self.refs:
+                v = self.labels[self.refs[cursor][0]] - cursor
+                if self.endianness == "le":
+                    self.data[cursor + 0] = (v & 255)
+                    self.data[cursor + 1] = ((v >> 8) & 255)
+                    self.data[cursor + 2] = ((v >> 16) & 255)
+                    self.data[cursor + 3] = ((v >> 24) & 255)
+                elif self.endianness == "be":
+                    self.data[cursor + 0] = ((v >> 24) & 255)
+                    self.data[cursor + 1] = ((v >> 16) & 255)
+                    self.data[cursor + 2] = ((v >> 8) & 255)
+                    self.data[cursor + 3] = (v & 255)
+                else:
+                    assert 0
+                cursor += 4
+            else:
+                cursor += 1
+
+    def write_verbose_c(self, f, ctype="const unsigned char"):
+        assert self.finalized
+        print("%s %s[%d] = {" % (ctype, self.cname, len(self.data)), file=f)
+        cursor = 0
+        bytecnt = 0
+        while cursor < len(self.data):
+            if cursor in self.comments:
+                if bytecnt == 0:
+                    print(" ", end="", file=f)
+                print(" // %s" % self.comments[cursor], file=f)
+                bytecnt = 0
+            if cursor in self.labels_byaddr:
+                if bytecnt != 0:
+                    print(file=f)
+                if cursor in self.exports:
+                    print("#define %s ((%s*)(%s+%d))" % (
+                        self.labels_byaddr[cursor], self.ltypes_byaddr[cursor], self.cname, cursor), file=f)
+                else:
+                    print("  // [%d] %s" % (cursor, self.labels_byaddr[cursor]), file=f)
+                bytecnt = 0
+            if cursor in self.refs:
+                if bytecnt != 0:
+                    print(file=f)
+                print(" ", end="", file=f)
+                print(" %-4s" % ("%d," % self.data[cursor + 0]), end="", file=f)
+                print(" %-4s" % ("%d," % self.data[cursor + 1]), end="", file=f)
+                print(" %-4s" % ("%d," % self.data[cursor + 2]), end="", file=f)
+                print(" %-4s" % ("%d," % self.data[cursor + 3]), end="", file=f)
+                print(" // [%d] %s (reference to %s)" % (cursor, self.refs[cursor][1], self.refs[cursor][0]), file=f)
+                bytecnt = 0
+                cursor += 4
+            else:
+                if bytecnt == 0:
+                    print(" ", end="", file=f)
+                print(" %-4s" % ("%d," % self.data[cursor]), end=("" if bytecnt < 15 else "\n"), file=f)
+                bytecnt = (bytecnt + 1) & 15
+                cursor += 1
+        if bytecnt != 0:
+            print(file=f)
+        print("};", file=f)
+
+    def write_compact_c(self, f, ctype="const unsigned char"):
+        assert self.finalized
+        print("%s %s[%d] = {" % (ctype, self.cname, len(self.data)), file=f)
+        column = 0
+        for v in self.data:
+            if column == 0:
+                print("  ", end="", file=f)
+                column += 2
+            s = "%d," % v
+            print(s, end="", file=f)
+            column += len(s)
+            if column > 75:
+                print(file=f)
+                column = 0
+        if column != 0:
+            print(file=f)
+        for cursor in self.exports:
+            print("#define %s ((%s*)(%s+%d))" % (
+                self.labels_byaddr[cursor], self.ltypes_byaddr[cursor], self.cname, cursor), file=f)
+        print("};", file=f)
+
+    def write_uint64_c(self, f, ctype="const uint64_t"):
+        assert self.finalized
+        print("%s %s[%d] = {" % (ctype, self.cname, (len(self.data) + 7) // 8), file=f)
+        column = 0
+        for i in range((len(self.data) + 7) // 8):
+            v0 = self.data[8 * i + 0] if 8 * i + 0 < len(self.data) else 0
+            v1 = self.data[8 * i + 1] if 8 * i + 1 < len(self.data) else 0
+            v2 = self.data[8 * i + 2] if 8 * i + 2 < len(self.data) else 0
+            v3 = self.data[8 * i + 3] if 8 * i + 3 < len(self.data) else 0
+            v4 = self.data[8 * i + 4] if 8 * i + 4 < len(self.data) else 0
+            v5 = self.data[8 * i + 5] if 8 * i + 5 < len(self.data) else 0
+            v6 = self.data[8 * i + 6] if 8 * i + 6 < len(self.data) else 0
+            v7 = self.data[8 * i + 7] if 8 * i + 7 < len(self.data) else 0
+            if self.endianness == "le":
+                v = v0 << 0
+                v |= v1 << 8
+                v |= v2 << 16
+                v |= v3 << 24
+                v |= v4 << 32
+                v |= v5 << 40
+                v |= v6 << 48
+                v |= v7 << 56
+            elif self.endianness == "be":
+                v = v7 << 0
+                v |= v6 << 8
+                v |= v5 << 16
+                v |= v4 << 24
+                v |= v3 << 32
+                v |= v2 << 40
+                v |= v1 << 48
+                v |= v0 << 56
+            else:
+                assert 0
+            if column == 3:
+                print(" 0x%016x," % v, file=f)
+                column = 0
+            else:
+                if column == 0:
+                    print(" ", end="", file=f)
+                print(" 0x%016x," % v, end="", file=f)
+                column += 1
+        if column != 0:
+            print("", file=f)
+        print("};", file=f)
+
+    def write_string_c(self, f, ctype="const char"):
+        assert self.finalized
+        assert self.data[len(self.data) - 1] == 0
+        print("%s %s[%d] =" % (ctype, self.cname, len(self.data)), file=f)
+        print("  \"", end="", file=f)
+        column = 0
+        for i in range(len(self.data) - 1):
+            if (self.data[i] < 32) or (self.data[i] > 126):
+                print("\\%03o" % self.data[i], end="", file=f)
+                column += 4
+            elif self.data[i] == ord('"') or self.data[i] == ord('\\'):
+                print("\\" + chr(self.data[i]), end="", file=f)
+                column += 2
+            else:
+                print(chr(self.data[i]), end="", file=f)
+                column += 1
+            if column > 70 and (i != len(self.data) - 2):
+                print("\"\n  \"", end="", file=f)
+                column = 0
+        print("\";", file=f)
+
+    def write_binary(self, f):
+        assert self.finalized
+        assert self.data[len(self.data) - 1] == 0
+        f.buffer.write(self.data)
+
+
+bel_types = {
+    "NONE": 0,
+    "SLICE": 1,
+    "PIO": 2
+}
+
+def write_database(dev_name, endianness):
+    def write_loc(x, y, sym_name):
+        bba.s16(x, "%s.x" % sym_name)
+        bba.s16(y, "%s.y" % sym_name)
+
+    bba = BinaryBlobAssembler("chipdb_blob_%s" % dev_name, endianness)
+    bba.r("chip_info", "chip_info")
+
+    for loctype, idx in sorted(location_types.items(), key=lambda x: x[1]):
+        wires, arcs, bels = loctype
+        if len(arcs) > 0:
+            bba.l("loc%d_pips" % idx, "PipInfoPOD")
+            for arc in arcs:
+                src_wire, dst_wire, configurable, tile_type = arc
+                write_loc(src_wire[0], src_wire[1], "src")
+                write_loc(dst_wire[0], dst_wire[1], "dst")
+                bba.u32(src_wire[2], "src_idx")
+                bba.u32(dst_wire[2], "dst_idx")
+                bba.u32(1, "delay")  # TODO:delay
+                bba.u16(tile_type, "tile_type")
+                bba.u8(1 if not configurable else 0, "pip_type")
+                bba.u8(0, "padding")
+        if len(wires) > 0:
+            for wire_idx in range(len(wires)):
+                wire = wires[wire_idx]
+                name, downpips, uppips, downbels, upbels = wire
+                if len(downpips) > 0:
+                    bba.l("loc%d_wire%d_downpips" % (idx, wire_idx), "PipLocatorPOD")
+                    for dp in downpips:
+                        write_loc(dp[0], dp[1], "rel_loc")
+                        bba.u32(dp[2], "index")
+                if len(uppips) > 0:
+                    bba.l("loc%d_wire%d_uppips" % (idx, wire_idx), "PipLocatorPOD")
+                    for up in uppips:
+                        write_loc(up[0], up[1], "rel_loc")
+                        bba.u32(up[2], "index")
+                if len(downbels) > 0:
+                    bba.l("loc%d_wire%d_downbels" % (idx, wire_idx), "BelPortPOD")
+                    for db in downbels:
+                        bel, pin = db
+                        write_loc(bel[0], bel[1], "rel_bel_loc")
+                        bba.u32(bel[2], "bel_index")
+                        bba.u32(pin, "port")
+            bba.l("loc%d_wires" % idx, "WireInfoPOD")
+            for wire_idx in range(len(wires)):
+                wire = wires[wire_idx]
+                name, downpips, uppips, downbels, upbels = wire
+                bba.s(name, "name")
+                bba.u32(len(uppips), "num_uphill")
+                bba.u32(len(downpips), "num_downhill")
+                bba.r("loc%d_wire%d_uppips" % (idx, wire_idx) if len(uppips) > 0 else None, "pips_uphill")
+                bba.r("loc%d_wire%d_downpips" % (idx, wire_idx) if len(downpips) > 0 else None, "pips_downhill")
+                bba.u32(len(downbels), "num_bels_downhill")
+                if len(upbels) == 1:
+                    bel, pin = upbels[0]
+                    write_loc(bel[0], bel[1], "uphill_bel_loc")
+                    bba.u32(bel[2], "uphill_bel_idx")
+                    bba.u32(pin, "uphill_bel_pin")
+                else:
+                    write_loc(-1, -1, "bel_uphill.rel_bel_loc")
+                    bba.u32(0xFFFFFFFF, "bel_uphill.bel_index")
+                    bba.u32(0, "bel_uphill.port")
+                bba.r("loc%d_wire%d_downbels" % (idx, wire_idx) if len(downbels) > 0 else None, "bels_downhill")
+        if len(bels) > 0:
+            for bel_idx in range(len(bels)):
+                bel, beltype, pins = bels[bel_idx]
+                bba.l("loc%d_bel%d_wires" % (idx, bel_idx), "BelPortPOD")
+                for pin in pins:
+                    port, wire = pin
+                    write_loc(wire[0], wire[1], "rel_wire_loc")
+                    bba.u32(wire[2], "wire_index")
+                    bba.u32(port, "port")
+            bba.l("loc%d_bels" % idx, "BelInfoPOD")
+            for bel_idx in range(len(bels)):
+                bel, beltype, pins = bels[bel_idx]
+                bba.s(bel, "name")
+                bba.u32(bel_types[beltype], "type")
+                bba.u32(len(pins), "num_bel_wires")
+                bba.r("loc%d_bel%d_wires" % (idx, bel_idx), "bel_wires")
+
+    bba.l("locations", "LocationTypePOD")
+    for loctype, idx in sorted(location_types.items(), key=lambda x: x[1]):
+        wires, arcs, bels = loctype
+        bba.u32(len(bels), "num_bels")
+        bba.u32(len(wires), "num_wires")
+        bba.u32(len(arcs), "num_pips")
+        bba.r("loc%d_bels" % idx if len(bels) > 0 else None, "bel_data")
+        bba.r("loc%d_wires" % idx if len(wires) > 0 else None, "wire_data")
+        bba.r("loc%d_pips" % idx if len(arcs) > 0 else None, "pips_data")
+
+    bba.l("location_types", "int32_t")
+    for y in range(0, max_row+1):
+        for x in range(0, max_col+1):
+            bba.u32(type_at_location[x, y], "loctype")
+
+    bba.l("tiletype_names", "RelPtr<char>")
+    for tt in tiletype_names:
+        bba.s(tt, "name")
+
+    bba.l("chip_info")
+    bba.u32(max_col + 1, "width")
+    bba.u32(max_row + 1, "height")
+    bba.u32((max_col + 1) * (max_row + 1), "num_tiles")
+    bba.u32(len(location_types), "num_location_types")
+    bba.r("locations", "locations")
+    bba.r("location_types", "location_type")
+    bba.r("tiletype_names", "tiletype_names")
+    bba.finalize()
+    return bba
+
+dev_names = {"25k": "LFE5U-25F", "45k": "LFE5U-45F", "85k": "LFE5U-85F"}
+
+def main():
+    global max_row, max_col
+    pytrellis.load_database(database.get_db_root())
+    args = parser.parse_args()
+
+    # Read port pin file
+    with open(args.portspins) as f:
+        for line in f:
+            line = line.replace("(", " ")
+            line = line.replace(")", " ")
+            line = line.split()
+            if len(line) == 0:
+                continue
+            assert len(line) == 2
+            assert line[0] == "X"
+            idx = len(portpins) + 1
+            portpins[line[1]] = idx
+
+    print("Initialising chip...")
+    chip = pytrellis.Chip(dev_names[args.device])
+    print("Building routing graph...")
+    rg = chip.get_routing_graph()
+    max_row = chip.get_max_row()
+    max_col = chip.get_max_col()
+    print("Indexing wires...")
+    for y in range(0, max_row + 1):
+        for x in range(0, max_col + 1):
+            import_location_wires(rg, x, y)
+    print("Indexing arcs...")
+    for y in range(0, max_row + 1):
+        for x in range(0, max_col + 1):
+            index_location_arcs(rg, x, y)
+    print("Adding bels...")
+    for y in range(0, max_row + 1):
+        for x in range(0, max_col + 1):
+            add_bels(chip, x, y)
+    print("Importing tiles...")
+    for y in range(0, max_row + 1):
+        for x in range(0, max_col + 1):
+            print("     At R{}C{}".format(y, x))
+            import_location(rg, x, y)
+    print("{} unique location types".format(len(location_types)))
+    bba = write_database(args.device, "le")
+
+
+    if args.c_file:
+        print('#include "nextpnr.h"', file=args.outfile)
+        print('NEXTPNR_NAMESPACE_BEGIN', file=args.outfile)
+
+
+    if args.binary:
+        bba.write_binary(args.outfile)
+
+    if args.c_file:
+        bba.write_string_c(args.outfile)
+
+    if args.c_file:
+        print('NEXTPNR_NAMESPACE_END', file=args.outfile)
+
+if __name__ == "__main__":
+    main()
diff --git a/gui/ecp5/family.cmake b/gui/ecp5/family.cmake
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/gui/ecp5/family.cmake
diff --git a/gui/ecp5/mainwindow.cc b/gui/ecp5/mainwindow.cc
new file mode 100644
index 00000000..6cc3dd15
--- /dev/null
+++ b/gui/ecp5/mainwindow.cc
@@ -0,0 +1,50 @@
+/*

+ *  nextpnr -- Next Generation Place and Route

+ *

+ *  Copyright (C) 2018  Miodrag Milanovic <miodrag@symbioticeda.com>

+ *

+ *  Permission to use, copy, modify, and/or distribute this software for any

+ *  purpose with or without fee is hereby granted, provided that the above

+ *  copyright notice and this permission notice appear in all copies.

+ *

+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

+ *

+ */

+

+#include "mainwindow.h"

+

+static void initMainResource() { Q_INIT_RESOURCE(nextpnr); }

+

+NEXTPNR_NAMESPACE_BEGIN

+

+MainWindow::MainWindow(QWidget *parent) : BaseMainWindow(parent)

+{

+    initMainResource();

+

+    std::string title = "nextpnr-ecp5 - [EMPTY]";

+    setWindowTitle(title.c_str());

+

+    createMenu();

+}

+

+MainWindow::~MainWindow() {}

+

+void MainWindow::createMenu()

+{

+    QMenu *menu_Custom = new QMenu("&Generic", menuBar);

+    menuBar->addAction(menu_Custom->menuAction());

+}

+

+void MainWindow::new_proj() {}

+

+void MainWindow::open_proj() {}

+

+bool MainWindow::save_proj() { return false; }

+

+NEXTPNR_NAMESPACE_END

diff --git a/gui/ecp5/mainwindow.h b/gui/ecp5/mainwindow.h
new file mode 100644
index 00000000..fd9812cd
--- /dev/null
+++ b/gui/ecp5/mainwindow.h
@@ -0,0 +1,46 @@
+/*

+ *  nextpnr -- Next Generation Place and Route

+ *

+ *  Copyright (C) 2018  Miodrag Milanovic <miodrag@symbioticeda.com>

+ *

+ *  Permission to use, copy, modify, and/or distribute this software for any

+ *  purpose with or without fee is hereby granted, provided that the above

+ *  copyright notice and this permission notice appear in all copies.

+ *

+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

+ *

+ */

+

+#ifndef MAINWINDOW_H

+#define MAINWINDOW_H

+

+#include "../basewindow.h"

+

+NEXTPNR_NAMESPACE_BEGIN

+

+class MainWindow : public BaseMainWindow

+{

+    Q_OBJECT

+

+  public:

+    explicit MainWindow(QWidget *parent = 0);

+    virtual ~MainWindow();

+

+  public:

+    void createMenu();

+

+  protected Q_SLOTS:

+    virtual void new_proj();

+    virtual void open_proj();

+    virtual bool save_proj();

+};

+

+NEXTPNR_NAMESPACE_END

+

+#endif // MAINWINDOW_H

diff --git a/gui/ecp5/nextpnr.qrc b/gui/ecp5/nextpnr.qrc
new file mode 100644
index 00000000..03585ec0
--- /dev/null
+++ b/gui/ecp5/nextpnr.qrc
@@ -0,0 +1,2 @@
+<RCC>
+</RCC>
diff --git a/ice40/arch_pybindings.cc b/ice40/arch_pybindings.cc
index 67a37983..ac8c189a 100644
--- a/ice40/arch_pybindings.cc
+++ b/ice40/arch_pybindings.cc
@@ -75,7 +75,7 @@ void arch_wrap_python()
     fn_wrapper_1a<Context, decltype(&Context::getConflictingBelCell), &Context::getConflictingBelCell,
                   conv_to_str<IdString>, conv_from_str<BelId>>::def_wrap(ctx_cls, "getConflictingBelCell");
     fn_wrapper_0a<Context, decltype(&Context::getBels), &Context::getBels, wrap_context<BelRange>>::def_wrap(ctx_cls,
-                                                                                                           "getBels");
+                                                                                                             "getBels");
     fn_wrapper_1a<Context, decltype(&Context::getBelsAtSameTile), &Context::getBelsAtSameTile, wrap_context<BelRange>,
                   conv_from_str<BelId>>::def_wrap(ctx_cls, "getBelsAtSameTile");
 
@@ -139,15 +139,15 @@ void arch_wrap_python()
     fn_wrapper_0a<Context, decltype(&Context::getChipName), &Context::getChipName, pass_through<std::string>>::def_wrap(
             ctx_cls, "getChipName");
     fn_wrapper_0a<Context, decltype(&Context::archId), &Context::archId, conv_to_str<IdString>>::def_wrap(ctx_cls,
-                                                                                                        "archId");
+                                                                                                          "archId");
 
     typedef std::unordered_map<IdString, std::unique_ptr<CellInfo>> CellMap;
     typedef std::unordered_map<IdString, std::unique_ptr<NetInfo>> NetMap;
 
     readonly_wrapper<Context, decltype(&Context::cells), &Context::cells, wrap_context<CellMap &>>::def_wrap(ctx_cls,
-                                                                                                           "cells");
+                                                                                                             "cells");
     readonly_wrapper<Context, decltype(&Context::nets), &Context::nets, wrap_context<NetMap &>>::def_wrap(ctx_cls,
-                                                                                                        "nets");
+                                                                                                          "nets");
     WRAP_RANGE(Bel, conv_to_str<BelId>);
     WRAP_RANGE(Wire, conv_to_str<WireId>);
     WRAP_RANGE(AllPip, conv_to_str<PipId>);