diff options
Diffstat (limited to 'ice40/pcf.cc')
| -rw-r--r-- | ice40/pcf.cc | 48 |
1 files changed, 46 insertions, 2 deletions
diff --git a/ice40/pcf.cc b/ice40/pcf.cc index ce453af9..a8273dd6 100644 --- a/ice40/pcf.cc +++ b/ice40/pcf.cc @@ -21,6 +21,7 @@ #include "pcf.h" #include <sstream> #include "log.h" +#include "util.h" NEXTPNR_NAMESPACE_BEGIN @@ -47,17 +48,43 @@ bool apply_pcf(Context *ctx, std::string filename, std::istream &in) if (words.size() == 0) continue; std::string cmd = words.at(0); + bool nowarn = false; if (cmd == "set_io") { size_t args_end = 1; - while (args_end < words.size() && words.at(args_end).at(0) == '-') + 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() - 1) log_error("expected PCF syntax 'set_io cell pin' (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()) { - log_warning("unmatched constraint '%s' (on line %d)\n", cell.c_str(), lineno); + 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()) @@ -67,11 +94,28 @@ bool apply_pcf(Context *ctx, std::string filename, std::istream &in) 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.emplace(ctx->id("input/pcf"), filename); return true; } catch (log_execution_error_exception) { |