[U-Boot] [PATCH] mx53loco: Fix U-Boot corruption after saving the environment
festevam at gmail.com
Fri Aug 30 16:58:29 UTC 2019
U-Boot binary has grown in such a way that it goes beyond the reserved
area for the environment variables.
Running "saveenv" causes U-Boot to hang because of this overlap.
Fix this problem by increasing the CONFIG_ENV_OFFSET size.
Also, in order to prevent this same problem in the future, use
CONFIG_BOARD_SIZE_LIMIT, which will detect the overlap in build-time.
CONFIG_BOARD_SIZE_LIMIT does not accept math expressions, so declare
CONFIG_ENV_OFFSET with its direct value instead.
Signed-off-by: Fabio Estevam <festevam at gmail.com>
include/configs/mx53loco.h | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/include/configs/mx53loco.h b/include/configs/mx53loco.h
index b734b822dd..65a5993f61 100644
@@ -163,8 +163,18 @@
#define CONFIG_SYS_INIT_SP_ADDR \
(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)
-/* environment organization */
-#define CONFIG_ENV_OFFSET (6 * 64 * 1024)
+/* Environment starts at 768k = 768 * 1024 = 786432 */
+#define CONFIG_ENV_OFFSET 786432
+ * Detect overlap between U-Boot image and environment area in build-time
+ * CONFIG_BOARD_SIZE_LIMIT = CONFIG_ENV_OFFSET - u-boot.imx offset
+ * CONFIG_BOARD_SIZE_LIMIT = 768k - 1k = 767k = 785408
+ * Currently CONFIG_BOARD_SIZE_LIMIT does not handle expressions, so
+ * write the direct value here
+#define CONFIG_BOARD_SIZE_LIMIT 785408
#define CONFIG_ENV_SIZE (8 * 1024)
#define CONFIG_SYS_MMC_ENV_DEV 0
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