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Block certain pips depending of DDFR mode

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This commit is contained in:
Miodrag Milanovic 2024-05-10 11:58:31 +02:00
parent 8322bbd5ef
commit e8a1b51eec
2 changed files with 22 additions and 0 deletions
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4
himbaechel/uarch/ng-ultra/ng_ultra.h
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@ -59,6 +59,8 @@ struct NgUltraImpl : HimbaechelAPI
delay_t estimateDelay(WireId src, WireId dst) const override;
delay_t predictDelay(BelId src_bel, IdString src_pin, BelId dst_bel, IdString dst_pin) const override;
bool checkPipAvail(PipId pip) const override { return blocked_pips.count(pip)==0; }
bool checkPipAvailForNet(PipId pip, const NetInfo *net) const override { return checkPipAvail(pip); };
public:
IdString tile_name_id(int tile) const;
std::string tile_name(int tile) const;
@ -67,6 +69,8 @@ public:
dict<std::string, std::string> bank_voltage;
dict<BelId,IdString> global_capable_bels;
pool<PipId> blocked_pips;
private:
void write_bitstream_json(const std::string &filename);
void route_clocks();

18
himbaechel/uarch/ng-ultra/pack.cc
View File

@ -475,6 +475,7 @@ void NgUltraPacker::pack_iobs(void)
NetInfo *o_net = cell->getPort(id_O);
if (o_net) {
CellInfo *iod = net_only_drives(ctx, o_net, is_dfr, id_I, true);
bool bfr_mode = false;
if (!iod) {
if (cell->type==id_IOTP) ddrf_as_bfr++; else dfr_as_bfr++;
iod = create_cell_ptr((cell->type==id_IOTP) ? id_DDFR : id_DFR, ctx->id(cell->name.str(ctx) + "$iod_id"));
@ -487,11 +488,28 @@ void NgUltraPacker::pack_iobs(void)
iod->setParam(ctx->id("data_inv"), Property(0, 1));
iod->connectPort(id_I, new_in);
cell->connectPort(id_O,new_in);
bfr_mode = true;
} else log_error("TODO handle DFR");
Loc cd_loc = cell->getLocation();
cd_loc.z += 1;
BelId bel = ctx->getBelByLocation(cd_loc);
ctx->bindBel(bel, iod, PlaceStrength::STRENGTH_LOCKED);
// Depending of DDFR mode we must use one of dedicated routes (ITCs)
if (iod->type==id_DDFR) {
WireId dwire = ctx->getBelPinWire(bel, id_O);
for (PipId pip : ctx->getPipsDownhill(dwire)) {
const auto &pip_data = chip_pip_info(ctx->chip_info, pip);
const auto &extra_data = *reinterpret_cast<const NGUltraPipExtraDataPOD *>(pip_data.extra_data.get());
if (!extra_data.name) continue;
if (extra_data.type != PipExtra::PIP_EXTRA_MUX) continue;
if (bfr_mode && extra_data.input == 2) {
uarch->blocked_pips.emplace(pip);
} else if (!bfr_mode && extra_data.input == 1) {
uarch->blocked_pips.emplace(pip);
}
}
}
}
}
if (dfr_as_bfr)