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/*
* nextpnr -- Next Generation Place and Route
*
* Copyright (C) 2021 Symbiflow Authors
*
*
* 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 "log.h"
#include "nextpnr.h"
#include "util.h"
NEXTPNR_NAMESPACE_BEGIN
void Arch::place_constraints()
{
std::vector<std::pair<IdString, BelId>> constrained_cells;
for (auto &cell_pair : cells) {
CellInfo *cell = cell_pair.second.get();
auto loc_constr = cell->attrs.find(id("LOC"));
auto bel_constr = cell->attrs.find(id("BEL"));
if (loc_constr == cell->attrs.end() || bel_constr == cell->attrs.end())
continue;
IdString loc_name = id(loc_constr->second.as_string());
IdString bel_name = id(bel_constr->second.as_string());
BelId bel;
for (size_t i = 0; i < chip_info->tiles.size(); ++i) {
const auto &tile = chip_info->tiles[i];
bool site_found = false;
for (size_t j = 0; j < tile.sites.size(); ++j) {
auto &site_data = chip_info->sites[tile.sites[j]];
if (loc_name == id(site_data.site_name.get())) {
site_found = true;
break;
}
}
if (!site_found)
continue;
const auto &tile_type = chip_info->tile_types[tile.type];
bool bel_found = false;
for (size_t j = 0; j < tile_type.bel_data.size(); ++j) {
const BelInfoPOD &bel_data = tile_type.bel_data[j];
if (bel_name == IdString(bel_data.name)) {
bel.tile = i;
bel.index = j;
bel_found = true;
break;
}
}
if (bel_found)
break;
else
log_error("No bel found for user constraint \'%s/%s\' for cell \'%s\'\n", loc_name.c_str(getCtx()),
bel_name.c_str(getCtx()), cell->name.c_str(getCtx()));
}
if (!isValidBelForCellType(cell->type, bel))
log_error("Bel \'%s\' is invalid for cell \'%s\' (%s)\n", nameOfBel(bel), cell->name.c_str(getCtx()),
cell->type.c_str(getCtx()));
auto bound_cell = getBoundBelCell(bel);
if (bound_cell)
log_error("Cell \'%s\' cannot be bound to bel \'%s\' "
"since it is already bound to cell \'%s\'\n",
cell->name.c_str(getCtx()), nameOfBel(bel), bound_cell->name.c_str(getCtx()));
bindBel(bel, cell, STRENGTH_USER);
cell->attrs.erase(id("BEL"));
constrained_cells.emplace_back(cell->name, bel);
}
if (constrained_cells.empty())
return;
log_info("Cell placed via user constraints:\n");
for (auto cell_bel : constrained_cells) {
IdString cell_name = cell_bel.first;
BelId bel = cell_bel.second;
if (!isBelLocationValid(bel))
log_error(" - Bel \'%s\' is not valid for cell \'%s\'\n", nameOfBel(bel), cell_name.c_str(getCtx()));
log_info(" - %s placed at %s\n", cell_name.c_str(getCtx()), nameOfBel(cell_bel.second));
}
}
NEXTPNR_NAMESPACE_END
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