From 91ecaa6ad6ae5f88d48bae1c71cb708b9d21ee21 Mon Sep 17 00:00:00 2001
From: gatecat <gatecat@ds0.me>
Date: Tue, 5 May 2026 15:13:31 +0200
Subject: [PATCH] gatemate: Enable static placer as an option

Signed-off-by: gatecat <gatecat@ds0.me>
---
 himbaechel/uarch/gatemate/gatemate.cc | 75 +++++++++++++++++++++++++++
 himbaechel/uarch/gatemate/gatemate.h  |  1 +
 2 files changed, 76 insertions(+)

diff --git a/himbaechel/uarch/gatemate/gatemate.cc b/himbaechel/uarch/gatemate/gatemate.cc
index a271feaf..219cb71e 100644
--- a/himbaechel/uarch/gatemate/gatemate.cc
+++ b/himbaechel/uarch/gatemate/gatemate.cc
@@ -23,6 +23,7 @@
 #include "log.h"
 #include "nextpnr_assertions.h"
 #include "placer_heap.h"
+#include "placer_static.h"
 
 #define GEN_INIT_CONSTIDS
 #define HIMBAECHEL_CONSTIDS "uarch/gatemate/constids.inc"
@@ -1003,6 +1004,80 @@ void GateMateImpl::configurePlacerHeap(PlacerHeapCfg &cfg)
     cfg.placeAllAtOnce = true;
 }
 
+void GateMateImpl::configurePlacerStatic(PlacerStaticCfg &cfg)
+{
+    cfg.glbBufTypes.insert(id_CLKIN);
+    cfg.glbBufTypes.insert(id_GLBOUT);
+    cfg.glbBufTypes.insert(id_PLL);
+    cfg.glbBufTypes.insert(id_USR_RSTN);
+    cfg.glbBufTypes.insert(id_CFG_CTRL);
+    cfg.glbBufTypes.insert(id_SERDES);
+
+    {
+        cfg.cell_groups.emplace_back();
+        auto &comb = cfg.cell_groups.back();
+        comb.name = ctx->id("COMB");
+        comb.bel_area[id_CPE_LT_U] = StaticRect(1.0f, 0.5f);
+        comb.bel_area[id_CPE_LT_L] = StaticRect(1.0f, 0.5f);
+
+        comb.bel_area[id_CPE_CPLINES] = StaticRect(0.0f, 0.0f);
+        comb.bel_area[id_CPE_COMP] = StaticRect(0.0f, 0.0f);
+        comb.bel_area[id_CPE_RAMIO_U] = StaticRect(0.0f, 0.0f);
+        comb.bel_area[id_CPE_RAMIO_L] = StaticRect(0.0f, 0.0f);
+
+        comb.cell_area[id_CPE_LT_U] = StaticRect(1.0f, 0.5f);
+        comb.cell_area[id_CPE_LT_L] = StaticRect(1.0f, 0.5f);
+        comb.cell_area[id_CPE_LT] = StaticRect(1.0f, 0.5f);
+        comb.cell_area[id_CPE_L2T4] = StaticRect(1.0f, 0.5f);
+        comb.cell_area[id_CPE_DUMMY] = StaticRect(1.0f, 0.5f);
+
+        comb.cell_area[id_CPE_CPLINES] = StaticRect(1.0f, 0.5f);
+        comb.cell_area[id_CPE_COMP] = StaticRect(1.0f, 0.5f);
+        comb.cell_area[id_CPE_RAMIO] = StaticRect(1.0f, 0.5f);
+        comb.cell_area[id_CPE_RAMI] = StaticRect(1.0f, 0.5f);
+        comb.cell_area[id_CPE_RAMO] = StaticRect(1.0f, 0.5f);
+
+        comb.zero_area_cells.insert(id_CPE_CPLINES);
+        comb.zero_area_cells.insert(id_CPE_COMP);
+        comb.zero_area_cells.insert(id_CPE_RAMIO);
+        comb.zero_area_cells.insert(id_CPE_RAMI);
+        comb.zero_area_cells.insert(id_CPE_RAMO);
+
+        comb.spacer_rect = StaticRect(1.0f, 0.5f);
+    }
+
+    {
+        cfg.cell_groups.emplace_back();
+        auto &ff = cfg.cell_groups.back();
+        ff.name = ctx->id("FF");
+
+        ff.bel_area[id_CPE_FF_U] = StaticRect(1.0f, 0.5f);
+        ff.bel_area[id_CPE_FF_L] = StaticRect(1.0f, 0.5f);
+
+        ff.cell_area[id_CPE_FF_U] = StaticRect(1.0f, 0.5f);
+        ff.cell_area[id_CPE_FF_L] = StaticRect(1.0f, 0.5f);
+        ff.cell_area[id_CPE_FF] = StaticRect(1.0f, 0.5f);
+        ff.cell_area[id_CPE_LATCH] = StaticRect(1.0f, 0.5f);
+
+        ff.spacer_rect = StaticRect(1.0f, 0.5f);
+    }
+
+    {
+        cfg.cell_groups.emplace_back();
+        auto &ram = cfg.cell_groups.back();
+        ram.name = ctx->id("RAM");
+
+        ram.bel_area[id_RAM] = StaticRect(1.0f, 2.0f);
+        ram.bel_area[id_RAM_HALF_L] = StaticRect(1.0f, 2.0f);
+
+        ram.cell_area[id_RAM] = StaticRect(1.0f, 2.0f);
+        ram.cell_area[id_RAM_HALF] = StaticRect(1.0f, 2.0f);
+        ram.cell_area[id_RAM_HALF_DUMMY] = StaticRect(1.0f, 2.0f);
+
+        ram.spacer_rect = StaticRect(1.0f, 2.0f);
+    }
+}
+
 int GateMateImpl::get_dff_config(CellInfo *dff) const
 {
     int val = 0;
diff --git a/himbaechel/uarch/gatemate/gatemate.h b/himbaechel/uarch/gatemate/gatemate.h
index db954ae4..746e5bf8 100644
--- a/himbaechel/uarch/gatemate/gatemate.h
+++ b/himbaechel/uarch/gatemate/gatemate.h
@@ -78,6 +78,7 @@ struct GateMateImpl : HimbaechelAPI
     Loc getRelativeConstraint(Loc &root_loc, IdString id) const;
 
     void configurePlacerHeap(PlacerHeapCfg &cfg) override;
+    void configurePlacerStatic(PlacerStaticCfg &cfg) override;
 
     bool isPipInverting(PipId pip) const override;