Implement generic MAX2771 raw Ethernet recorder

rtl/common/reset_sync.sv

@@ -0,0 +1,27 @@
+`default_nettype none
+
+module reset_sync #(
+    parameter int unsigned STAGES = 2
+) (
+    input  wire logic clk,
+    input  wire logic arst,
+    output      logic srst
+);
+    (* ASYNC_REG = "TRUE" *) logic [STAGES-1:0] sync_ff;
+
+    initial begin
+        if (STAGES < 2) $error("reset_sync STAGES must be at least two");
+    end
+
+    always_ff @(posedge clk or posedge arst) begin
+        if (arst) begin
+            sync_ff <= '1;
+        end else begin
+            sync_ff <= {sync_ff[STAGES-2:0], 1'b0};
+        end
+    end
+
+    assign srst = sync_ff[STAGES-1];
+endmodule
+
+`default_nettype wire