From 40f47d5748520d65a06651eae7dcd7687bde87a4 Mon Sep 17 00:00:00 2001
From: Alex Forencich <alex@alexforencich.com>
Date: Fri, 31 Jul 2026 23:23:14 -0700
Subject: [PATCH] eth: Warn on out-of-frame data transfers in BASE-R model

Signed-off-by: Alex Forencich <alex@alexforencich.com>
---
 src/eth/tb/baser.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/eth/tb/baser.py b/src/eth/tb/baser.py
index 8dde39a..a821c4c 100644
--- a/src/eth/tb/baser.py
+++ b/src/eth/tb/baser.py
@@ -851,6 +851,8 @@ class BaseRSerdesSink:
                 # data
                 dl = db
                 cl = [0]*8
+                if frame is None:
+                    self.log.warning("Data transfer outside of frame")
             elif hdr == BaseRSync.CTRL:
                 if db[0] == BaseRBlockType.CTRL:
                     # C7 C6 C5 C4 C3 C2 C1 C0 BT
@@ -987,6 +989,10 @@ class BaseRSerdesSink:
                         else:
                             self.log.info("RX sequence ordered set: 0x%06x", self.os)
 
+            if frame is None:
+                if cl[0] == 0:
+                    self.log.warning("Data transfer outside of frame")
+
             for k in range(8):
                 d_val = dl[k]
                 c_val = cl[k]