diff options
Diffstat (limited to 'ecp5/main.cc')
| -rw-r--r-- | ecp5/main.cc | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/ecp5/main.cc b/ecp5/main.cc index 98b6b901..15027a5a 100644 --- a/ecp5/main.cc +++ b/ecp5/main.cc @@ -25,6 +25,7 @@ #include "design_utils.h" #include "log.h" #include "timing.h" +#include "util.h" USING_NEXTPNR_NAMESPACE @@ -68,6 +69,7 @@ po::options_description ECP5CommandHandler::getArchOptions() 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-allow-unconstrained", "don't require LPF file(s) to constrain all IO"); return specific; } @@ -162,6 +164,22 @@ void ECP5CommandHandler::customAfterLoad(Context *ctx) if (!ctx->applyLPF(filename, in)) log_error("failed to parse LPF file '%s'\n", filename.c_str()); } + + 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("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)); + } + } + } } } |