From a5582f59bf8d3afe2032d7da705484221a5ad6e9 Mon Sep 17 00:00:00 2001
From: Miodrag Milanovic <mmicko@gmail.com>
Date: Fri, 21 Jun 2024 10:34:25 +0200
Subject: [PATCH] existing gck

---
 himbaechel/uarch/ng-ultra/pack.cc | 84 ++++++++++++++++++++++++++++++-
 1 file changed, 83 insertions(+), 1 deletion(-)

diff --git a/himbaechel/uarch/ng-ultra/pack.cc b/himbaechel/uarch/ng-ultra/pack.cc
index a8ebe1a6..1d813223 100644
--- a/himbaechel/uarch/ng-ultra/pack.cc
+++ b/himbaechel/uarch/ng-ultra/pack.cc
@@ -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()