initial commit

Signed-off-by: Ian M. <ian@aptel.org>

1 files changed, 48 insertions, 0 deletions

diff --git a/rtl/uncore/north_bridge.sv b/rtl/uncore/north_bridge.sv
new file mode 100644
index 0000000..f2aa285
--- /dev/null
+++ b/rtl/uncore/north_bridge.sv
@@ -0,0 +1,48 @@
+//
+// Copyright (c) 2026, Apollo Telephone Laboratories.
+// Provided under the BSD-3 clause.
+//
+
+//
+// The AT-LI02 uncore north-bridge
+//
+// @refclk_i:   Reference clock input from on-board VCO
+// @reset_ni:   Active-low reset input
+// @dclk_o:     Derieved clock output
+// @gclk_o:     Gated global clock output
+// @greset_o:   Global reset output
+//
+module north_bridge (
+    input wire refclk_i,
+    input wire reset_ni,
+
+    output logic dclk_o,
+    output logic gclk_o,
+    output logic greset_o
+);
+    logic clk_en = 1;
+    logic dclk;
+    logic gclk;
+    logic pll_locked;
+    logic greset;
+
+    // Clock domain 0
+    clkgen clkdom0 (
+        .refclk_i(refclk_i),
+        .reset_ni(reset_ni),
+        .clk_en_i(clk_en),
+        .dclk_o(dclk),
+        .gclk_o(gclk),
+        .pll_locked_o(pll_locked)
+    );
+
+    // Reset bridge
+    always_ff @(posedge dclk) begin
+        greset <= ~reset_ni | ~pll_locked;
+    end
+
+    // Continuous assignments
+    assign dclk_o   = dclk;
+    assign gclk_o   = gclk;
+    assign greset_o = greset;
+endmodule