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existing gck

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This commit is contained in:
Miodrag Milanovic 2024-06-21 10:34:25 +02:00
parent 3066fd921a
commit a5582f59bf
1 changed files with 83 additions and 1 deletions
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84
himbaechel/uarch/ng-ultra/pack.cc
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@ -1696,7 +1696,89 @@ void NgUltraImpl::postPlace()
void NgUltraPacker::duplicate_gck()
{
//log_info("Duplicating existing GCKs...\n");
// Unbind all GCKs that are inserted
for (auto &cell : ctx->cells) {
CellInfo &ci = *cell.second;
if (!ci.type.in(id_GCK))
continue;
ctx->unbindBel(ci.bel);
}
dict<IdString,pool<IdString>> glb_sources;
glb_sources[id_GCK].insert(id_SO);
dict<IdString,pool<IdString>> clock_sinks;
clock_sinks[id_BEYOND_FE].insert(id_CK);
//clock_sinks[id_DFF].insert(id_CK); // This is part of BEYOND_FE
clock_sinks[id_RF].insert(id_WCK);
clock_sinks[id_RFSP].insert(id_WCK);
clock_sinks[id_XHRF].insert(id_WCK1);
clock_sinks[id_XHRF].insert(id_WCK2);
clock_sinks[id_XWRF].insert(id_WCK1);
clock_sinks[id_XWRF].insert(id_WCK2);
clock_sinks[id_XPRF].insert(id_WCK1);
clock_sinks[id_XPRF].insert(id_WCK2);
clock_sinks[id_RAM].insert(id_ACK);
clock_sinks[id_RAM].insert(id_BCK);
clock_sinks[id_DSP].insert(id_CK);
//glb_sources[id_BFR].insert(id_O);
//glb_sources[id_GCK].insert(id_SO);
log_info("Duplicating existing GCKs...\n");
for (auto &net : ctx->nets) {
NetInfo *glb_net = net.second.get();
if (!glb_net->driver.cell)
continue;
// check if we have a global clock net, skip otherwise
if (!(glb_sources.count(glb_net->driver.cell->type) && glb_sources[glb_net->driver.cell->type].count(glb_net->driver.port)))
continue;
log_info(" Global signal '%s'\n", glb_net->name.c_str(ctx));
dict<int, std::vector<PortRef>> connections;
for (const auto &usr : glb_net->users) {
if (clock_sinks.count(usr.cell->type) && clock_sinks[usr.cell->type].count(usr.port)) {
if (usr.cell->bel==BelId()) {
log_error("Cell '%s' not placed\n",usr.cell->name.c_str(ctx));
}
int lobe = uarch->tile_lobe(usr.cell->bel.tile);
if (lobe > 0) {
connections[lobe].push_back(usr);
usr.cell->disconnectPort(usr.port);
}
}
}
if (connections.size()>1)
log_error("Unhandled\n");
for (auto &conn : connections) {
pool<BelId>& gck = uarch->gck_per_lobe[conn.first];
if (gck.size()==0)
log_error("No GCK left to promote global signal.\n");
BelId bel = gck.pop();
CellInfo *gck_cell = glb_net->driver.cell;
log_info(" Assign GCK '%s' to lobe %d\n",gck_cell->name.c_str(ctx), conn.first);
/*
log_info(" Create GCK for lobe %d\n",conn.first);
CellInfo *gck_cell = create_cell_ptr(id_GCK, ctx->id(glb_net->name.str(ctx) + "$gck_"+ std::to_string(conn.first)));
gck_cell->params[id_std_mode] = Property("BYPASS");
gck_cell->connectPort(id_SI1, glb_net);*/
gck_cell->disconnectPort(id_SO);
NetInfo *new_clk = ctx->createNet(ctx->id(gck_cell->name.str(ctx) + "$gck_"+ std::to_string(conn.first)));
gck_cell->connectPort(id_SO, new_clk);
for (const auto &usr : conn.second) {
CellInfo *cell = usr.cell;
IdString port = usr.port;
cell->connectPort(port, new_clk);
}
ctx->bindBel(bel, gck_cell, PlaceStrength::STRENGTH_LOCKED);
}
}
}
void NgUltraPacker::insert_bypass_gck()