fetch1: Fix debug stop again

This fixes a bug which prevents the core from stopping properly.  The
same bug was previously fixed in commit e41cb01bca99 ("fetch1: Fix
debug stop", 2020-12-19) and reintroduced by commit 0fb207be6069
("fetch1: Implement a simple branch target cache", 2020-12-19).

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>

diff --git a/fetch1.vhdl b/fetch1.vhdl
index 4c4a6a8ea64256c5521dc27b438ab4f837250681..af1dd6bda0b0d95b43273f7cb7efd5e3c140ef19 100644 (file)
--- a/fetch1.vhdl
+++ b/fetch1.vhdl
@@ -93,7 +93,7 @@ begin
             end if;
             -- always send the up-to-date stop mark and req
             r.stop_mark <= stop_in;
-            r.req <= not rst;
+            r.req <= not rst and not stop_in;
        end if;
     end process;
     log_out <= log_nia;