103 lines
3.8 KiB
C++
103 lines
3.8 KiB
C++
/*
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* nextpnr -- Next Generation Place and Route
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*
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* Copyright (C) 2021 Symbiflow Authors
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*
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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#include "log.h"
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#include "nextpnr.h"
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#include "util.h"
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NEXTPNR_NAMESPACE_BEGIN
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void Arch::place_constraints()
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{
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std::vector<std::pair<IdString, BelId>> constrained_cells;
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for (auto &cell_pair : cells) {
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CellInfo *cell = cell_pair.second.get();
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auto loc_constr = cell->attrs.find(id("LOC"));
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auto bel_constr = cell->attrs.find(id("BEL"));
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if (loc_constr == cell->attrs.end() || bel_constr == cell->attrs.end())
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continue;
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IdString loc_name = id(loc_constr->second.as_string());
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IdString bel_name = id(bel_constr->second.as_string());
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BelId bel;
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for (size_t i = 0; i < chip_info->tiles.size(); ++i) {
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const auto &tile = chip_info->tiles[i];
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bool site_found = false;
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for (size_t j = 0; j < tile.sites.size(); ++j) {
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auto &site_data = chip_info->sites[tile.sites[j]];
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if (loc_name == id(site_data.site_name.get())) {
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site_found = true;
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break;
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}
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}
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if (!site_found)
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continue;
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const auto &tile_type = chip_info->tile_types[tile.type];
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bool bel_found = false;
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for (size_t j = 0; j < tile_type.bel_data.size(); ++j) {
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const BelInfoPOD &bel_data = tile_type.bel_data[j];
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if (bel_name == IdString(bel_data.name)) {
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bel.tile = i;
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bel.index = j;
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bel_found = true;
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break;
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}
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}
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if (bel_found)
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break;
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else
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log_error("No bel found for user constraint \'%s/%s\' for cell \'%s\'\n", loc_name.c_str(getCtx()),
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bel_name.c_str(getCtx()), cell->name.c_str(getCtx()));
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}
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if (!isValidBelForCellType(cell->type, bel))
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log_error("Bel \'%s\' is invalid for cell \'%s\' (%s)\n", nameOfBel(bel), cell->name.c_str(getCtx()),
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cell->type.c_str(getCtx()));
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auto bound_cell = getBoundBelCell(bel);
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if (bound_cell)
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log_error("Cell \'%s\' cannot be bound to bel \'%s\' "
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"since it is already bound to cell \'%s\'\n",
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cell->name.c_str(getCtx()), nameOfBel(bel), bound_cell->name.c_str(getCtx()));
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bindBel(bel, cell, STRENGTH_USER);
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if (!isBelLocationValid(bel))
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log_error("Bel \'%s\' is not valid for cell "
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"\'%s\' of type \'%s\'\n",
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nameOfBel(bel), cell->name.c_str(getCtx()), cell->type.c_str(getCtx()));
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constrained_cells.emplace_back(cell->name, bel);
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}
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if (constrained_cells.empty())
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return;
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log_info("Cell placed via user constraints:\n");
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for (auto cell_bel : constrained_cells)
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log_info(" - %s placed at %s\n", cell_bel.first.c_str(getCtx()), nameOfBel(cell_bel.second));
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}
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NEXTPNR_NAMESPACE_END
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