From 59dc1b7eb4f3a0fda23d2c8624c3ecd26515fec8 Mon Sep 17 00:00:00 2001
From: Uwe Bonnes <bon@elektron.ikp.physik.tu-darmstadt.de>
Date: Mon, 19 Oct 2020 16:02:16 +0200
Subject: [PATCH] cortex-m7: Give hint about buggy core revision.

---
 src/target/cortexm.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/target/cortexm.c b/src/target/cortexm.c
index e523141..0965735 100644
--- a/src/target/cortexm.c
+++ b/src/target/cortexm.c
@@ -319,6 +319,10 @@ bool cortexm_probe(ADIv5_AP_t *ap)
 
 	case 0xc27:
 		t->core = "M7";
+		if ((((cpuid >> 20) & 0xf) == 0) && (((cpuid >> 0) & 0xf) < 2)) {
+			DEBUG_WARN("Silicon bug: Single stepping will enter pending "
+					   "exception handler with this M7 core revision!\n");
+		}
 		break;
 
 	case 0xc60: