Kconfig: Add SPL_SYS_MALLOC_CLEAR_ON_INIT

Add SPL version of SYS_MALLOC_CLEAR_ON_INIT, this would help devices
that need to clear ram before use to work correctly.

Signed-off-by: Bo Gan <ganboing@gmail.com>
Signed-off-by: Shengyu Qu <wiagn233@outlook.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

diff --git a/Kconfig b/Kconfig
index 91170bf..6ba605a 100644 (file)
--- a/Kconfig
+++ b/Kconfig
@@ -372,6 +372,17 @@ if EXPERT
          When disabling this, please check if malloc calls, maybe
          should be replaced by calloc - if one expects zeroed memory.
 
+config SPL_SYS_MALLOC_CLEAR_ON_INIT
+       bool "Init with zeros the memory reserved for malloc (slow) in SPL"
+       depends on SPL
+       default SYS_MALLOC_CLEAR_ON_INIT
+       help
+         Same as SYS_MALLOC_CLEAR_ON_INIT, but for SPL. It's possible to
+         Enable it without SYS_MALLOC_CLEAR_ON_INIT. It's useful for boards
+         that must have particular memory regions zero'ed before first use.
+         If SYS_SPL_MALLOC_START is configured to be in such region, this
+         option should be enabled.
+
 config SYS_MALLOC_DEFAULT_TO_INIT
        bool "Default malloc to init while reserving the memory for it"
        help