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| author | David Shah <dave@ds0.me> | 2020-05-14 13:19:57 +0100 |
|---|---|---|
| committer | David Shah <dave@ds0.me> | 2020-05-14 13:26:56 +0100 |
| commit | 163dee1e1ad90091cbb2742190a07aa87fa83d7f (patch) | |
| tree | 6c091b92dff610d53bed4a4fa371c7d0d8288645 | |
| parent | 3c60ea383d988937c45559fcc2f387b3c187287f (diff) | |
| download | nextpnr-163dee1e1ad90091cbb2742190a07aa87fa83d7f.tar.gz nextpnr-163dee1e1ad90091cbb2742190a07aa87fa83d7f.tar.bz2 nextpnr-163dee1e1ad90091cbb2742190a07aa87fa83d7f.zip | |
ecp5: Disconnect dedicated DCU inputs if connected to constants
Signed-off-by: David Shah <dave@ds0.me>
| -rw-r--r-- | ecp5/pack.cc | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/ecp5/pack.cc b/ecp5/pack.cc index 55b2c791..fb8a95e9 100644 --- a/ecp5/pack.cc +++ b/ecp5/pack.cc @@ -1617,6 +1617,18 @@ class Ecp5Packer for (auto pin : ctx->getBelPins(exemplar_bel)) if (ctx->getBelPinType(exemplar_bel, pin) == PORT_IN) autocreate_empty_port(ci, pin); + // Disconnect these ports if connected to constant to prevent routing failure + for (auto ndport : {id_D_TXBIT_CLKP_FROM_ND, id_D_TXBIT_CLKN_FROM_ND, id_D_SYNC_ND, + id_D_TXPLL_LOL_FROM_ND, id_CH0_HDINN, id_CH0_HDINP, id_CH1_HDINN, id_CH1_HDINP}) { + const NetInfo *net = get_net_or_empty(ci, ndport); + if (net == nullptr || net->driver.cell == nullptr) + continue; + IdString ct = net->driver.cell->type; + if (ct == ctx->id("GND") || ct == ctx->id("VCC")) { + disconnect_port(ctx, ci, ndport); + ci->ports.erase(ndport); + } + } } } for (auto cell : sorted(ctx->cells)) { |