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ecp5: Disconnect dedicated DCU inputs if connected to constants

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Signed-off-by: David Shah <dave@ds0.me>
This commit is contained in:
David Shah 2020-05-14 13:19:57 +01:00
parent 3c60ea383d
commit 163dee1e1a
1 changed files with 12 additions and 0 deletions
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12
ecp5/pack.cc
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@ -1617,6 +1617,18 @@ class Ecp5Packer
for (auto pin : ctx->getBelPins(exemplar_bel)) for (auto pin : ctx->getBelPins(exemplar_bel))
if (ctx->getBelPinType(exemplar_bel, pin) == PORT_IN) if (ctx->getBelPinType(exemplar_bel, pin) == PORT_IN)
autocreate_empty_port(ci, pin); 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)) { for (auto cell : sorted(ctx->cells)) {