diff options
Diffstat (limited to 'ecp5/pack.cc')
| -rw-r--r-- | ecp5/pack.cc | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/ecp5/pack.cc b/ecp5/pack.cc index ae416a7b..66428e95 100644 --- a/ecp5/pack.cc +++ b/ecp5/pack.cc @@ -1039,6 +1039,8 @@ class Ecp5Packer for (auto cell : sorted(ctx->cells)) { CellInfo *ci = cell.second; if (ci->type == id_DCUA) { + if (!ci->attrs.count(ctx->id("BEL"))) + log_error("DCU must be constrained to a Bel!\n"); // Empty port auto-creation to generate correct tie-downs BelId exemplar_bel; for (auto bel : ctx->getBels()) { @@ -1051,6 +1053,36 @@ class Ecp5Packer for (auto pin : ctx->getBelPins(exemplar_bel)) if (ctx->getBelPinType(exemplar_bel, pin) == PORT_IN) autocreate_empty_port(ci, pin); + } else if (ci->type == id_EXTREFB) { + const NetInfo *refo = net_or_nullptr(ci, id_REFCLKO); + CellInfo *dcu = nullptr; + if (refo == nullptr) + log_error("EXTREFB REFCLKO must not be unconnected\n"); + for (auto user : refo->users) { + if (user.cell->type != id_DCUA || (dcu != nullptr && dcu != user.cell)) + log_error("EXTREFB REFCLKO must only drive a single DCUA\n"); + dcu = user.cell; + } + if (!dcu->attrs.count(ctx->id("BEL"))) + log_error("DCU must be constrained to a Bel!\n"); + std::string bel = dcu->attrs.at(ctx->id("BEL")); + NPNR_ASSERT(bel.substr(bel.length() - 3) == "DCU"); + bel.replace(bel.length() - 3, 3, "EXTREF"); + ci->attrs[ctx->id("BEL")] = bel; + } else if (ci->type == id_PCSCLKDIV) { + const NetInfo *clki = net_or_nullptr(ci, id_CLKI); + if (clki != nullptr && clki->driver.cell != nullptr && clki->driver.cell->type == id_DCUA) { + CellInfo *dcu = clki->driver.cell; + if (!dcu->attrs.count(ctx->id("BEL"))) + log_error("DCU must be constrained to a Bel!\n"); + BelId bel = ctx->getBelByName(ctx->id(dcu->attrs.at(ctx->id("BEL")))); + if (bel == BelId()) + log_error("Invalid DCU bel '%s'\n", dcu->attrs.at(ctx->id("BEL")).c_str()); + Loc loc = ctx->getBelLocation(bel); + // DCU0 -> CLKDIV z=0; DCU1 -> CLKDIV z=1 + ci->constr_abs_z = true; + ci->constr_z = (loc.x >= 69) ? 1 : 0; + } } } } |