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/*
* nextpnr -- Next Generation Place and Route
*
* Copyright (C) 2018 Clifford Wolf <clifford@symbioticeda.com>
* Copyright (C) 2018 David Shah <david@symbioticeda.com>
*
* 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 "pcf.h"
#include <sstream>
#include "log.h"
#include "util.h"
NEXTPNR_NAMESPACE_BEGIN
// Read a w
// Apply PCF constraints to a pre-packing design
bool apply_pcf(Context *ctx, std::string filename, std::istream &in)
{
try {
if (!in)
log_error("failed to open PCF file\n");
std::string line;
int lineno = 0;
while (std::getline(in, line)) {
lineno++;
size_t cstart = line.find("#");
if (cstart != std::string::npos)
line = line.substr(0, cstart);
std::stringstream ss(line);
std::vector<std::string> words;
std::string tmp;
while (ss >> tmp)
words.push_back(tmp);
if (words.size() == 0)
continue;
std::string cmd = words.at(0);
bool nowarn = false;
if (cmd == "set_io") {
size_t args_end = 1;
std::vector<std::pair<IdString, std::string>> extra_attrs;
while (args_end < words.size() && words.at(args_end).at(0) == '-') {
const auto &setting = words.at(args_end);
if (setting == "-pullup") {
const auto &value = words.at(++args_end);
if (value == "yes" || value == "1")
extra_attrs.emplace_back(std::make_pair(ctx->id("PULLUP"), "1"));
else if (value == "no" || value == "0")
extra_attrs.emplace_back(std::make_pair(ctx->id("PULLUP"), "0"));
else
log_error("Invalid value '%s' for -pullup (on line %d)\n", value.c_str(), lineno);
} else if (setting == "-pullup_resistor") {
const auto &value = words.at(++args_end);
if (ctx->args.type != ArchArgs::UP5K)
log_error("Pullup resistance can only be set on UP5K (on line %d)\n", lineno);
if (value != "3P3K" && value != "6P8K" && value != "10K" && value != "100K")
log_error("Invalid value '%s' for -pullup_resistor (on line %d)\n", value.c_str(), lineno);
extra_attrs.emplace_back(std::make_pair(ctx->id("PULLUP_RESISTOR"), value));
} else if (setting == "-nowarn") {
nowarn = true;
} else if (setting == "--warn-no-port") {
} else {
log_warning("Ignoring PCF setting '%s' (on line %d)\n", setting.c_str(), lineno);
}
args_end++;
}
if (args_end > words.size() - 2)
log_error("expected PCF syntax 'set_io cell pin' (on line %d)\n", lineno);
else if (args_end < words.size() - 2 && !nowarn)
log_warning("Ignoring trailing PCF settings (on line %d)\n", lineno);
std::string cell = words.at(args_end);
std::string pin = words.at(args_end + 1);
auto fnd_cell = ctx->cells.find(ctx->id(cell));
if (fnd_cell == ctx->cells.end()) {
if (!nowarn)
log_warning("unmatched constraint '%s' (on line %d)\n", cell.c_str(), lineno);
} else {
BelId pin_bel = ctx->getPackagePinBel(pin);
if (pin_bel == BelId())
log_error("package does not have a pin named '%s' (on line %d)\n", pin.c_str(), lineno);
if (fnd_cell->second->attrs.count(ctx->id("BEL")))
log_error("duplicate pin constraint on '%s' (on line %d)\n", cell.c_str(), lineno);
fnd_cell->second->attrs[ctx->id("BEL")] = ctx->getBelName(pin_bel).str(ctx);
log_info("constrained '%s' to bel '%s'\n", cell.c_str(),
fnd_cell->second->attrs[ctx->id("BEL")].c_str());
for (const auto &attr : extra_attrs)
fnd_cell->second->attrs[attr.first] = attr.second;
}
} else {
log_error("unsupported PCF command '%s' (on line %d)\n", cmd.c_str(), lineno);
}
}
for (auto cell : sorted(ctx->cells)) {
CellInfo *ci = cell.second;
if (ci->type == ctx->id("$nextpnr_ibuf") || ci->type == ctx->id("$nextpnr_obuf") ||
ci->type == ctx->id("$nextpnr_iobuf")) {
if (!ci->attrs.count(ctx->id("BEL"))) {
if (bool_or_default(ctx->settings, ctx->id("pcf_allow_unconstrained")))
log_warning("IO '%s' is unconstrained in PCF and will be automatically placed\n",
cell.first.c_str(ctx));
else
log_error("IO '%s' is unconstrained in PCF (override this error with "
"--pcf-allow-unconstrained)\n",
cell.first.c_str(ctx));
}
}
}
ctx->settings[ctx->id("input/pcf")] = filename;
return true;
} catch (log_execution_error_exception) {
return false;
}
}
NEXTPNR_NAMESPACE_END
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