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Added LPF support

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This commit is contained in:
Miodrag Milanovic 2023-04-01 19:45:36 +02:00 committed by myrtle
parent a0ba9afcba
commit 05a191a014
4 changed files with 226 additions and 3 deletions
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4
gui/machxo2/mainwindow.cc
View File

@ -124,7 +124,7 @@ void MainWindow::open_lpf()
{
QString fileName = QFileDialog::getOpenFileName(this, QString("Open LPF"), QString(), QString("*.lpf"));
if (!fileName.isEmpty()) {
/*std::ifstream in(fileName.toStdString());
std::ifstream in(fileName.toStdString());
if (ctx->apply_lpf(fileName.toStdString(), in)) {
log("Loading LPF successful.\n");
actionPack->setEnabled(true);
@ -132,7 +132,7 @@ void MainWindow::open_lpf()
} else {
actionLoadLPF->setEnabled(true);
log("Loading LPF failed.\n");
}*/
}
}
}

3
machxo2/arch.h
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@ -960,6 +960,9 @@ struct Arch : BaseArch<ArchRanges>
NPNR_ASSERT_FALSE_STR("no tile with type " + type);
}
// Apply LPF constraints to the context
bool apply_lpf(std::string filename, std::istream &in);
static const std::string defaultPlacer;
static const std::vector<std::string> availablePlacers;
static const std::string defaultRouter;

186
machxo2/lpf.cc Normal file
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@ -0,0 +1,186 @@
/*
* nextpnr -- Next Generation Place and Route
*
* Copyright (C) 2018 gatecat <gatecat@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.
*
*/
#include <boost/algorithm/string.hpp>
#include <sstream>
#include "arch.h"
#include "log.h"
#include "nextpnr_namespaces.h"
NEXTPNR_NAMESPACE_BEGIN
static const pool<std::string> sysconfig_keys = {
"SLAVE_SPI_PORT", "MASTER_SPI_PORT", "SLAVE_PARALLEL_PORT",
"BACKGROUND_RECONFIG", "DONE_EX", "DONE_OD",
"DONE_PULL", "MCCLK_FREQ", "TRANSFR",
"CONFIG_IOVOLTAGE", "CONFIG_SECURE", "WAKE_UP",
"COMPRESS_CONFIG", "CONFIG_MODE", "INBUF",
};
static const pool<std::string> iobuf_keys = {
"IO_TYPE", "BANK", "BANK_VCC", "VREF", "PULLMODE", "DRIVE", "SLEWRATE",
"CLAMP", "OPENDRAIN", "DIFFRESISTOR", "DIFFDRIVE", "HYSTERESIS", "TERMINATION",
};
bool Arch::apply_lpf(std::string filename, std::istream &in)
{
auto isempty = [](const std::string &str) {
return std::all_of(str.begin(), str.end(), [](char c) { return isblank(c) || c == '\r' || c == '\n'; });
};
try {
if (!in)
log_error("failed to open LPF file\n");
std::string line;
std::string linebuf;
int lineno = 0;
auto strip_quotes = [&](const std::string &str) {
if (str.at(0) == '"') {
if (str.back() != '"') {
log_error("expected '\"' at end of string '%s' (on line %d)\n", str.c_str(), lineno);
}
return str.substr(1, str.size() - 2);
} else {
return str;
}
};
while (std::getline(in, line)) {
++lineno;
size_t cstart = line.find('#');
if (cstart != std::string::npos)
line = line.substr(0, cstart);
cstart = line.find("//");
if (cstart != std::string::npos)
line = line.substr(0, cstart);
if (isempty(line))
continue;
linebuf += line;
// Look for a command up to a semicolon
size_t scpos = linebuf.find(';');
while (scpos != std::string::npos) {
std::string command = linebuf.substr(0, scpos);
// Split command into words
std::stringstream ss(command);
std::vector<std::string> words;
std::string tmp;
while (ss >> tmp)
words.push_back(tmp);
if (words.size() > 0) {
std::string verb = words.at(0);
if (verb == "BLOCK") {
if (words.size() != 2 || (words.at(1) != "ASYNCPATHS" && words.at(1) != "RESETPATHS"))
log_warning(" ignoring unsupported LPF command '%s' (on line %d)\n", command.c_str(),
lineno);
} else if (verb == "SYSCONFIG") {
for (size_t i = 1; i < words.size(); i++) {
std::string setting = words.at(i);
size_t eqpos = setting.find('=');
if (eqpos == std::string::npos)
log_error("expected syntax 'SYSCONFIG <attr>=<value>...' (on line %d)\n", lineno);
std::string key = setting.substr(0, eqpos), value = setting.substr(eqpos + 1);
if (!sysconfig_keys.count(key))
log_error("unexpected SYSCONFIG key '%s' (on line %d)\n", key.c_str(), lineno);
settings[id("arch.sysconfig." + key)] = value;
}
} else if (verb == "FREQUENCY") {
if (words.size() < 2)
log_error("expected object type after FREQUENCY (on line %d)\n", lineno);
std::string etype = words.at(1);
if (etype == "PORT" || etype == "NET") {
if (words.size() < 4)
log_error("expected frequency value and unit after 'FREQUENCY %s' (on line %d)\n",
etype.c_str(), lineno);
std::string target = strip_quotes(words.at(2));
float freq = std::stof(words.at(3));
std::string unit = words.at(4);
boost::algorithm::to_upper(unit);
if (unit == "MHZ")
;
else if (unit == "KHZ")
freq /= 1.0e3;
else if (unit == "HZ")
freq /= 1.0e6;
else
log_error("unsupported frequency unit '%s' (on line %d)\n", unit.c_str(), lineno);
addClock(id(target), freq);
} else {
log_warning(" ignoring unsupported LPF command '%s %s' (on line %d)\n", command.c_str(),
etype.c_str(), lineno);
}
} else if (verb == "LOCATE") {
if (words.size() < 5)
log_error("expected syntax 'LOCATE COMP <port name> SITE <pin>' (on line %d)\n", lineno);
if (words.at(1) != "COMP")
log_error("expected 'COMP' after 'LOCATE' (on line %d)\n", lineno);
std::string cell = strip_quotes(words.at(2));
if (words.at(3) != "SITE")
log_error("expected 'SITE' after 'LOCATE COMP %s' (on line %d)\n", cell.c_str(), lineno);
if (words.size() > 5)
log_error("unexpected input following LOCATE clause (on line %d)\n", lineno);
auto fnd_cell = cells.find(id(cell));
// 1-bit wires are treated as scalar by nextpnr.
// In HDL they might have been a singleton vector.
if (fnd_cell == cells.end() && cell.size() >= 3 && cell.substr(cell.size() - 3) == "[0]") {
cell = cell.substr(0, cell.size() - 3);
fnd_cell = cells.find(id(cell));
}
if (fnd_cell != cells.end()) {
fnd_cell->second->attrs[id_LOC] = strip_quotes(words.at(4));
}
} else if (verb == "IOBUF") {
if (words.size() < 3)
log_error("expected syntax 'IOBUF PORT <port name> <attr>=<value>...' (on line %d)\n",
lineno);
if (words.at(1) != "PORT")
log_error("expected 'PORT' after 'IOBUF' (on line %d)\n", lineno);
std::string cell = strip_quotes(words.at(2));
auto fnd_cell = cells.find(id(cell));
if (fnd_cell != cells.end()) {
for (size_t i = 3; i < words.size(); i++) {
std::string setting = words.at(i);
size_t eqpos = setting.find('=');
if (eqpos == std::string::npos)
log_error(
"expected syntax 'IOBUF PORT <port name> <attr>=<value>...' (on line %d)\n",
lineno);
std::string key = setting.substr(0, eqpos), value = setting.substr(eqpos + 1);
if (!iobuf_keys.count(key))
log_warning("IOBUF '%s' attribute '%s' is not recognised (on line %d)\n",
cell.c_str(), key.c_str(), lineno);
fnd_cell->second->attrs[id(key)] = value;
}
}
}
}
linebuf = linebuf.substr(scpos + 1);
scpos = linebuf.find(';');
}
}
if (!isempty(linebuf))
log_error("unexpected end of LPF file\n");
settings[id("input/lpf")] = filename;
return true;
} catch (log_execution_error_exception) {
return false;
}
}
NEXTPNR_NAMESPACE_END

36
machxo2/main.cc
View File

@ -36,6 +36,7 @@ class MachXO2CommandHandler : public CommandHandler
virtual ~MachXO2CommandHandler(){};
std::unique_ptr<Context> createContext(dict<std::string, Property> &values) override;
void setupArchContext(Context *ctx) override{};
void customAfterLoad(Context *ctx) override;
void customBitstream(Context *ctx) override;
protected:
@ -50,7 +51,10 @@ po::options_description MachXO2CommandHandler::getArchOptions()
specific.add_options()("device", po::value<std::string>(), "device name");
specific.add_options()("list-devices", "list all supported device names");
specific.add_options()("textcfg", po::value<std::string>(), "textual configuration in Trellis format to write");
// specific.add_options()("lpf", po::value<std::vector<std::string>>(), "LPF pin constraint file(s)");
specific.add_options()("lpf", po::value<std::vector<std::string>>(), "LPF pin constraint file(s)");
specific.add_options()("lpf-allow-unconstrained", "don't require LPF file(s) to constrain all IO");
specific.add_options()("disable-router-lutperm", "don't allow the router to permute LUT inputs");
return specific;
@ -82,6 +86,36 @@ std::unique_ptr<Context> MachXO2CommandHandler::createContext(dict<std::string,
return ctx;
}
void MachXO2CommandHandler::customAfterLoad(Context *ctx)
{
if (vm.count("lpf")) {
std::vector<std::string> files = vm["lpf"].as<std::vector<std::string>>();
for (const auto &filename : files) {
std::ifstream in(filename);
if (!in)
log_error("failed to open LPF file '%s'\n", filename.c_str());
if (!ctx->apply_lpf(filename, in))
log_error("failed to parse LPF file '%s'\n", filename.c_str());
}
for (auto &cell : ctx->cells) {
CellInfo *ci = cell.second.get();
if (ci->type == ctx->id("$nextpnr_ibuf") || ci->type == ctx->id("$nextpnr_obuf") ||
ci->type == ctx->id("$nextpnr_iobuf")) {
if (!ci->attrs.count(id_LOC)) {
if (vm.count("lpf-allow-unconstrained"))
log_warning("IO '%s' is unconstrained in LPF and will be automatically placed\n",
cell.first.c_str(ctx));
else
log_error("IO '%s' is unconstrained in LPF (override this error with "
"--lpf-allow-unconstrained)\n",
cell.first.c_str(ctx));
}
}
}
}
}
int main(int argc, char *argv[])
{
MachXO2CommandHandler handler(argc, argv);