mx6sabresd: Fix U-Boot corruption after saving the environment
U-Boot binary has grown in such a way that it goes beyond the reserved
area for the environment variables.
Running "saveenv" and rebooting the board causes U-Boot to hang because
of this overlap.
Fix this problem by selecting CONFIG_LTO so that the U-Boot proper
size can be reduced.
Also, to prevent this same problem to happen in the future, use
CONFIG_BOARD_SIZE_LIMIT, which can detect the overlap in build-time.
CONFIG_BOARD_SIZE_LIMIT is calculated as follows:
CONFIG_BOARD_SIZE_LIMIT = CONFIG_ENV_OFFSET - u-boot-img.dtb offset
CONFIG_BOARD_SIZE_LIMIT = 0xc000 - 69 * 1024
CONFIG_BOARD_SIZE_LIMIT = 715766
Signed-off-by: Fabio Estevam <festevam@denx.de>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Igor Opaniuk <igor.opaniuk@foundries.io>
diff --git a/configs/mx6sabresd_defconfig b/configs/mx6sabresd_defconfig
index a90efe4..d4fb556 100644
--- a/configs/mx6sabresd_defconfig
+++ b/configs/mx6sabresd_defconfig
@@ -21,6 +21,9 @@
CONFIG_SPL=y
CONFIG_SPL_LIBDISK_SUPPORT=y
CONFIG_PCI=y
+CONFIG_LTO=y
+CONFIG_HAS_BOARD_SIZE_LIMIT=y
+CONFIG_BOARD_SIZE_LIMIT=715766
CONFIG_FIT=y
CONFIG_SPL_FIT_PRINT=y
CONFIG_SPL_LOAD_FIT=y