Adding archdefs and bba PODs

Signed-off-by: David Shah <dave@ds0.me>

6 files changed, 389 insertions, 1 deletions

diff --git a/.gitignore b/.gitignore
index ca7b6e7d..96e6e3cd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,7 @@
 /nextpnr-generic*
 /nextpnr-ice40*
 /nextpnr-ecp5*
+/nextpnr-nexus*
 cmake-build-*/
 Makefile
 cmake_install.cmake
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d9c18554..fa46956b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -66,7 +66,7 @@ endif()
 set(PROGRAM_PREFIX "" CACHE STRING "Name prefix for executables")
 
 # List of families to build
-set(FAMILIES generic ice40 ecp5)
+set(FAMILIES generic ice40 ecp5 nexus)
 
 set(ARCH "" CACHE STRING "Architecture family for nextpnr build")
 set_property(CACHE ARCH PROPERTY STRINGS ${FAMILIES})
diff --git a/nexus/arch.h b/nexus/arch.h
new file mode 100644
index 00000000..8be6208d
--- /dev/null
+++ b/nexus/arch.h
@@ -0,0 +1,172 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2020  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 NEXTPNR_H
+#error Include "arch.h" via "nextpnr.h" only.
+#endif
+
+#include <boost/iostreams/device/mapped_file.hpp>
+
+#include <iostream>
+
+NEXTPNR_NAMESPACE_BEGIN
+
+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) + int64_t(offset) * 4);
+    }
+
+    const T &operator[](size_t index) const { return get()[index]; }
+
+    const T &operator*() const { return *(get()); }
+
+    const T *operator->() const { return get(); }
+};
+
+/*
+    Fully deduplicated database
+
+    There are two key data structures in the database:
+
+    Locations (aka tile but not called this to avoid confusion
+    with Lattice terminology), are a (x, y) location.
+
+    Local wires; pips and bels are all stored once per variety of location
+    (called a location type) with a separate grid containing the location type
+    at a (x, y) coordinate.
+
+    Each location also has _neighbours_, other locations with interconnected
+    wires. The set of neighbours for a location are called a _neighbourhood_.
+
+    Each variety of _neighbourhood_ for a location type is also stored once,
+    using relative coordinates.
+
+*/
+
+NPNR_PACKED_STRUCT(struct BelWirePOD {
+    uint32_t port;
+    uint16_t type;
+    uint16_t wire_index; // wire index in tile
+});
+
+NPNR_PACKED_STRUCT(struct BelInfoPOD {
+    int32_t name;             // bel name in tile IdString
+    int32_t type;             // bel type IdString
+    int16_t rel_x, rel_y;     // bel location relative to parent
+    RelPtr<BelWirePOD> ports; // ports, sorted by name IdString
+    int32_t num_ports;        // number of ports
+});
+
+NPNR_PACKED_STRUCT(struct BelPinPOD {
+    uint32_t bel; // bel index in tile
+    int32_t pin;  // bel pin name IdString
+});
+
+enum TileWireFlags : uint32_t {
+    WIRE_PRIMARY = 0x80000000,
+}
+
+NPNR_PACKED_STRUCT(struct LocWireInfoPOD {
+    int32_t name; // wire name in tile IdString
+    uint32_t flags;
+    int32_t num_uphill, num_downhill, num_bpins;
+    // Note this pip lists exclude neighbourhood pips
+    RelPtr<int32_t> pips_uh, pips_dh; // list of uphill/downhill pip indices in tile
+    RelPtr<BelPinPOD> bel_pins;
+});
+
+NPNR_PACKED_STRUCT(struct PipInfoPOD {
+    uint16_t from_wire, to_wire;
+    int32_t tile_type;
+});
+
+enum RelLocFlags
+{
+    REL_GLOBAL = 0x80,
+    REL_BRANCH = 0x40,
+    REL_SPINE = 0x20,
+    REL_HROW = 0x10
+};
+
+enum ArcFlags
+{
+    LOGICAL_TO_PRIMARY = 0x80,
+    PHYSICAL_DOWNHILL = 0x08,
+};
+
+NPNR_PACKED_STRUCT(struct RelWireInfoPOD {
+    int16_t rel_x, rel_y;
+    uint16_t wire_index;
+    uint8_t loc_flags;
+    uint8_t arc_flags;
+});
+
+NPNR_PACKED_STRUCT(struct WireNeighboursInfoPOD {
+    uint16_t num_uphill, num_downhill;
+    RelPtr<RelWireInfoPOD> wires_uh, wires_dh;
+});
+
+NPNR_PACKED_STRUCT(struct LocNeighourhoodPOD { RelPtr<WireNeighboursInfoPOD> wire_neighbours; });
+
+NPNR_PACKED_STRUCT(struct LocTypePOD {
+    uint32_t num_bels, num_wires, num_pips, num_nhtypes;
+    RelPtr<BelInfoPOD> bels;
+    RelPtr<LocWireInfoPOD> wires;
+    RelPtr<PipInfoPOD> pips;
+    RelPtr<LocNeighourhoodPOD> neighbourhoods;
+});
+
+// A physical (bitstream) tile; of which there may be more than
+// one in a logical tile (XY grid location).
+// Tile name is reconstructed {prefix}R{row}C{col}:{tiletype}
+NPNR_PACKED_STRUCT(struct PhysicalTileInfoPOD {
+    int32_t prefix;   // tile name prefix IdString
+    int32_t tiletype; // tile type IdString
+});
+
+NPNR_PACKED_STRUCT(struct GridLocationPOD {
+    uint32_t loc_type;
+    uint16_t neighbourhood_type;
+    uint16_t num_phys_tiles;
+    RelPtr<PhysicalTileInfoPOD> phys_tiles;
+});
+
+NPNR_PACKED_STRUCT(struct ChipInfoPOD {
+    RelPtr<char> device_name;
+    uint16_t width;
+    uint16_t height;
+    RelPtr<GridLocationPOD> grid;
+});
+
+NPNR_PACKED_STRUCT(struct DatabasePOD {
+    uint32_t num_chips;
+    RelPtr<ChipInfoPOD> chips;
+});
+
+NEXTPNR_NAMESPACE_END
diff --git a/nexus/archdefs.h b/nexus/archdefs.h
new file mode 100644
index 00000000..32c48cdf
--- /dev/null
+++ b/nexus/archdefs.h
@@ -0,0 +1,215 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2020  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 NEXTPNR_H
+#error Include "archdefs.h" via "nextpnr.h" only.
+#endif
+
+NEXTPNR_NAMESPACE_BEGIN
+
+typedef int delay_t;
+
+struct DelayInfo
+{
+    delay_t min_delay = 0, max_delay = 0;
+
+    delay_t minRaiseDelay() const { return min_delay; }
+    delay_t maxRaiseDelay() const { return max_delay; }
+
+    delay_t minFallDelay() const { return min_delay; }
+    delay_t maxFallDelay() const { return max_delay; }
+
+    delay_t minDelay() const { return min_delay; }
+    delay_t maxDelay() const { return max_delay; }
+
+    DelayInfo operator+(const DelayInfo &other) const
+    {
+        DelayInfo ret;
+        ret.min_delay = this->min_delay + other.min_delay;
+        ret.max_delay = this->max_delay + other.max_delay;
+        return ret;
+    }
+};
+
+enum ConstIds
+{
+    ID_NONE
+#define X(t) , ID_##t
+#include "constids.inc"
+#undef X
+};
+
+#define X(t) static constexpr auto id_##t = IdString(ID_##t);
+#include "constids.inc"
+#undef X
+
+struct BelId
+{
+    int32_t tile = -1;
+    // PIP index in tile
+    int32_t index = -1;
+
+    bool operator==(const BelId &other) const { return tile == other.tile && index == other.index; }
+    bool operator!=(const BelId &other) const { return tile != other.tile || index != other.index; }
+    bool operator<(const BelId &other) const
+    {
+        return tile < other.tile || (tile == other.tile && index < other.index);
+    }
+};
+
+struct WireId
+{
+    int32_t tile = -1;
+    // Node wires: tile == -1; index = node index in chipdb
+    // Tile wires: tile != -1; index = wire index in tile
+    int32_t index = -1;
+
+    bool operator==(const WireId &other) const { return tile == other.tile && index == other.index; }
+    bool operator!=(const WireId &other) const { return tile != other.tile || index != other.index; }
+    bool operator<(const WireId &other) const
+    {
+        return tile < other.tile || (tile == other.tile && index < other.index);
+    }
+};
+
+struct PipId
+{
+    int32_t tile = -1;
+    // PIP index in tile
+    int32_t index = -1;
+
+    bool operator==(const PipId &other) const { return tile == other.tile && index == other.index; }
+    bool operator!=(const PipId &other) const { return tile != other.tile || index != other.index; }
+    bool operator<(const PipId &other) const
+    {
+        return tile < other.tile || (tile == other.tile && index < other.index);
+    }
+};
+
+struct GroupId
+{
+    enum : int8_t
+    {
+        TYPE_NONE,
+    } type = TYPE_NONE;
+    int8_t x = 0, y = 0;
+
+    bool operator==(const GroupId &other) const { return (type == other.type) && (x == other.x) && (y == other.y); }
+    bool operator!=(const GroupId &other) const { return (type != other.type) || (x != other.x) || (y == other.y); }
+};
+
+struct DecalId
+{
+    enum : int8_t
+    {
+        TYPE_NONE,
+        TYPE_BEL,
+        TYPE_WIRE,
+        TYPE_PIP,
+        TYPE_GROUP
+    } type = TYPE_NONE;
+    int32_t index = -1;
+    bool active = false;
+
+    bool operator==(const DecalId &other) const { return (type == other.type) && (index == other.index); }
+    bool operator!=(const DecalId &other) const { return (type != other.type) || (index != other.index); }
+};
+
+struct ArchNetInfo
+{
+    bool is_global = false;
+    bool is_clock, is_reset = false, is_enable = false;
+};
+
+struct ArchCellInfo
+{
+    union
+    {
+        struct
+        {
+            bool is_memory, is_carry;
+            int input_count;
+        } lutInfo;
+        struct
+        {
+            bool is_clkinv, is_lsrinv, is_ceinv, is_async, gsr;
+            NetInfo *clk, *lsr, *ce, *d;
+        } ffInfo;
+    };
+};
+
+NEXTPNR_NAMESPACE_END
+
+namespace std {
+template <> struct hash<NEXTPNR_NAMESPACE_PREFIX BelId>
+{
+    std::size_t operator()(const NEXTPNR_NAMESPACE_PREFIX BelId &bel) const noexcept
+    {
+        std::size_t seed = 0;
+        boost::hash_combine(seed, hash<int>()(bel.tile));
+        boost::hash_combine(seed, hash<int>()(bel.index));
+        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 = 0;
+        boost::hash_combine(seed, hash<int>()(wire.tile));
+        boost::hash_combine(seed, hash<int>()(wire.index));
+        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 = 0;
+        boost::hash_combine(seed, hash<int>()(pip.tile));
+        boost::hash_combine(seed, hash<int>()(pip.index));
+        return seed;
+    }
+};
+
+template <> struct hash<NEXTPNR_NAMESPACE_PREFIX GroupId>
+{
+    std::size_t operator()(const NEXTPNR_NAMESPACE_PREFIX GroupId &group) const noexcept
+    {
+        std::size_t seed = 0;
+        boost::hash_combine(seed, hash<int>()(group.type));
+        boost::hash_combine(seed, hash<int>()(group.x));
+        boost::hash_combine(seed, hash<int>()(group.y));
+        return seed;
+    }
+};
+
+template <> struct hash<NEXTPNR_NAMESPACE_PREFIX DecalId>
+{
+    std::size_t operator()(const NEXTPNR_NAMESPACE_PREFIX DecalId &decal) const noexcept
+    {
+        std::size_t seed = 0;
+        boost::hash_combine(seed, hash<int>()(decal.type));
+        boost::hash_combine(seed, hash<int>()(decal.index));
+        return seed;
+    }
+};
+} // namespace std
diff --git a/nexus/constids.inc b/nexus/constids.inc
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/nexus/constids.inc
diff --git a/nexus/family.cmake b/nexus/family.cmake
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/nexus/family.cmake