nexus: Disable center DCC-thrus on 17k device

Signed-off-by: gatecat <gatecat@ds0.me>
This commit is contained in:
gatecat 2021-06-16 13:47:21 +01:00
parent 84fc2877c6
commit 3d528adfdc
3 changed files with 29 additions and 1 deletions

View File

@ -171,6 +171,19 @@ Arch::Arch(ArchArgs args) : args(args)
BaseArch::init_cell_types();
BaseArch::init_bel_buckets();
if (device == "LIFCL-17") {
for (BelId bel : getBelsByTile(37, 10)) {
// These pips currently don't work, due to routing differences between the variants that the DB format needs
// some tweaks to accomodate properly
if (getBelType(bel) != id_DCC)
continue;
WireId w = getBelPinWire(bel, id_CLKI);
for (auto pip : getPipsUphill(w))
disabled_pips.insert(pip);
}
NPNR_ASSERT(disabled_pips.size() == 4);
}
}
// -----------------------------------------------------------------------

View File

@ -918,6 +918,8 @@ struct Arch : BaseArch<ArchRanges>
// inverse of the above for name->object mapping
dict<IdString, int> id_to_x, id_to_y;
pool<PipId> disabled_pips;
// -------------------------------------------------
std::string getChipName() const override;
@ -976,6 +978,20 @@ struct Arch : BaseArch<ArchRanges>
return tileStatus[bel.tile].boundcells[bel.index] == nullptr;
}
bool checkPipAvail(PipId pip) const override
{
if (disabled_pips.count(pip))
return false;
return BaseArch::checkPipAvail(pip);
}
bool checkPipAvailForNet(PipId pip, NetInfo *net) const override
{
if (disabled_pips.count(pip))
return false;
return BaseArch::checkPipAvailForNet(pip, net);
}
CellInfo *getBoundBelCell(BelId bel) const override
{
NPNR_ASSERT(bel != BelId());

View File

@ -312,7 +312,6 @@ struct NexusFasmWriter
}
}
NPNR_ASSERT(found);
}
}