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author | David Shah <dave@ds0.me> | 2020-01-06 15:04:38 +0000 |
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committer | David Shah <dave@ds0.me> | 2020-11-30 08:45:27 +0000 |
commit | 54e0ef9cf7ce15d5f1561135edd41da38a32949a (patch) | |
tree | 6144c2683245ed46afb64bc0dddbb409849bd04d /nexus/arch.h | |
parent | 1afa494e69e3c8af3dd5d1685b9cd2b1d3bea4d0 (diff) | |
download | nextpnr-54e0ef9cf7ce15d5f1561135edd41da38a32949a.tar.gz nextpnr-54e0ef9cf7ce15d5f1561135edd41da38a32949a.tar.bz2 nextpnr-54e0ef9cf7ce15d5f1561135edd41da38a32949a.zip |
Adding archdefs and bba PODs
Signed-off-by: David Shah <dave@ds0.me>
Diffstat (limited to 'nexus/arch.h')
-rw-r--r-- | nexus/arch.h | 172 |
1 files changed, 172 insertions, 0 deletions
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 |