From 54e0ef9cf7ce15d5f1561135edd41da38a32949a Mon Sep 17 00:00:00 2001 From: David Shah Date: Mon, 6 Jan 2020 15:04:38 +0000 Subject: Adding archdefs and bba PODs Signed-off-by: David Shah --- nexus/arch.h | 172 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 172 insertions(+) create mode 100644 nexus/arch.h (limited to 'nexus/arch.h') 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 + * + * + * 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 + +#include + +NEXTPNR_NAMESPACE_BEGIN + +template struct RelPtr +{ + int32_t offset; + + // void set(const T *ptr) { + // offset = reinterpret_cast(ptr) - + // reinterpret_cast(this); + // } + + const T *get() const + { + return reinterpret_cast(reinterpret_cast(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 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 pips_uh, pips_dh; // list of uphill/downhill pip indices in tile + RelPtr 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 wires_uh, wires_dh; +}); + +NPNR_PACKED_STRUCT(struct LocNeighourhoodPOD { RelPtr wire_neighbours; }); + +NPNR_PACKED_STRUCT(struct LocTypePOD { + uint32_t num_bels, num_wires, num_pips, num_nhtypes; + RelPtr bels; + RelPtr wires; + RelPtr pips; + RelPtr 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 phys_tiles; +}); + +NPNR_PACKED_STRUCT(struct ChipInfoPOD { + RelPtr device_name; + uint16_t width; + uint16_t height; + RelPtr grid; +}); + +NPNR_PACKED_STRUCT(struct DatabasePOD { + uint32_t num_chips; + RelPtr chips; +}); + +NEXTPNR_NAMESPACE_END -- cgit v1.2.3