[XS] Change in coreboot[main]: Disable NULL breakpoint at the end of bootblock

[Vladimir Serbinenko (Code Review)]

Vladimir Serbinenko has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/81506?usp=email )

Change subject: Disable NULL breakpoint at the end of bootblock
......................................................................

Disable NULL breakpoint at the end of bootblock

If stage is older then it will not be able to correctly disable it when
needed. New stages will reenable breakpoint early

Change-Id: I6d83dfd8c84ccdd97c1899f206519ada91c990d5
Signed-off-by: Vladimir Serbinenko 
---
M src/lib/prog_loaders.c
1 file changed, 9 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/06/81506/1

diff --git a/src/lib/prog_loaders.c b/src/lib/prog_loaders.c
index b2abbff..ee74c40 100644
--- a/src/lib/prog_loaders.c
+++ b/src/lib/prog_loaders.c
@@ -14,6 +14,9 @@
 #include <stage_cache.h>
 #include <symbols.h>
 #include <timestamp.h>
+#if CONFIG(DEBUG_NULL_DEREF_BREAKPOINTS_IN_ALL_STAGES)
+#include <arch/null_breakpoint.h>
+#endif

void run_romstage(void)
 {
@@ -39,6 +42,12 @@
    		goto fail;
    }

+#if CONFIG(DEBUG_NULL_DEREF_BREAKPOINTS_IN_ALL_STAGES)
+	/* When going from bootblock disable null breakpoint as romstage
+	   might not have this enabled or be too old.  */
+	null_breakpoint_disable();
+#endif
+
    timestamp_add_now(TS_COPYROM_END);

console_time_report();