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ecp5: Add SPINE routing to global router

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Signed-off-by: David Shah <davey1576@gmail.com>
This commit is contained in:
David Shah 2018-08-07 15:53:41 +02:00
parent 24414614d2
commit c8674652dc
1 changed files with 17 additions and 1 deletions
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18
ecp5/globals.cc
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@ -98,6 +98,16 @@ class Ecp5GlobalRouter
return *(ctx->getPipsUphill(tap_wire).begin());
}
PipId find_spine_pip(WireId tap_wire)
{
std::string wireName = ctx->getWireBasename(tap_wire).str(ctx);
Location spine_loc;
spine_loc.x = ctx->globalInfoAtLoc(tap_wire.location).spine_col;
spine_loc.y = ctx->globalInfoAtLoc(tap_wire.location).spine_row;
WireId spine_wire = ctx->getWireByLocAndBasename(spine_loc, wireName);
return *(ctx->getPipsUphill(spine_wire).begin());
}
void route_logic_tile_global(NetInfo *net, int global_index, PortRef user)
{
WireId userWire = ctx->getBelPinWire(user.cell->bel, ctx->portPinFromId(user.port));
@ -151,7 +161,13 @@ class Ecp5GlobalRouter
NetInfo *tap_net = ctx->getBoundPipNet(tap_pip);
if (tap_net == nullptr) {
ctx->bindPip(tap_pip, net, STRENGTH_LOCKED);
// TODO: SPINE
PipId spine_pip = find_spine_pip(ctx->getPipSrcWire(tap_pip));
NetInfo *spine_net = ctx->getBoundPipNet(spine_pip);
if (spine_net == nullptr) {
ctx->bindPip(spine_pip, net, STRENGTH_LOCKED);
} else {
NPNR_ASSERT(spine_net == net);
}
} else {
NPNR_ASSERT(tap_net == net);
}