arch: arm: cortex_m: fix D-Cache reset with CONFIG_INIT_ARCH_HW_AT_BOOT
On reset we do not know what is the status of the D-Cache, nor its
content.
If it is disabled, do not try to clean it, as it might contains random
data for random addresses, and this might just create a bus fault.
Invalidating it is enough.
If it is enabled, it means its content is not random.
SCB_InvalidateDCache() will clean it, invalidate it and disable it.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
1 file changed
