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-rw-r--r--Kconfig32
1 files changed, 25 insertions, 7 deletions
diff --git a/Kconfig b/Kconfig
index b879461..8f96c94 100644
--- a/Kconfig
+++ b/Kconfig
@@ -72,13 +72,31 @@ config SYS_MALLOC_F_LEN
initial serial device and any others that are needed.
menuconfig EXPERT
- bool "Configure standard U-Boot features (expert users)"
- help
- This option allows certain base U-Boot options and settings
- to be disabled or tweaked. This is for specialized
- environments which can tolerate a "non-standard" U-Boot.
- Only use this if you really know what you are doing.
-
+ bool "Configure standard U-Boot features (expert users)"
+ default y
+ help
+ This option allows certain base U-Boot options and settings
+ to be disabled or tweaked. This is for specialized
+ environments which can tolerate a "non-standard" U-Boot.
+ Only use this if you really know what you are doing.
+
+if EXPERT
+ config SYS_MALLOC_CLEAR_ON_INIT
+ bool "Init with zeros the memory reserved for malloc (slow)"
+ default y
+ help
+ This setting is enabled by default. The reserved malloc
+ memory is initialized with zeros, so first malloc calls
+ will return the pointer to the zeroed memory. But this
+ slows the boot time.
+
+ It is recommended to disable it, when CONFIG_SYS_MALLOC_LEN
+ value, has more than few MiB, e.g. when uses bzip2 or bmp logo.
+ Then the boot time can be significantly reduced.
+ Warning:
+ When disabling this, please check if malloc calls, maybe
+ should be replaced by calloc - if expects zeroed memory.
+endif
endmenu # General setup
menu "Boot images"