Re: [U-Boot] [PATCH 1/6] spl: add Kconfig option to clear bss early

Hi Simon,

On 11.03.19 22:35, Simon Goldschmidt wrote:

This introduces a new Kconfig option SPL_CLEAR_BSS_F. If enabled, it clears the bss before calling board_init_f() instead of clearing it before calling board_init_r().

This also ensures that variables placed in BSS can be shared between board_init_f() and board_init_r() in SPL.

Signed-off-by: Simon Goldschmidt simon.k.r.goldschmidt@gmail.com

common/spl/Kconfig | 11 +++++++++++ 1 file changed, 11 insertions(+)

diff --git a/common/spl/Kconfig b/common/spl/Kconfig index 206c24076d..5da8697994 100644 --- a/common/spl/Kconfig +++ b/common/spl/Kconfig @@ -156,6 +156,17 @@ config SPL_STACK_R_MALLOC_SIMPLE_LEN to give board_init_r() a larger heap then the initial heap in SRAM which is limited to SYS_MALLOC_F_LEN bytes.

+config SPL_CLEAR_BSS_F

• bool "Clear BSS section before calling board_init_f"
• help

•  The BSS section is initialized to zero. In SPL, this is normally done
  

•  before calling board_init_r().
  

•  For platforms using BSS in board_init_f() already, enable this to
  

•  clear the BSS section before calling board_init_f() instead of
  

•  clearing it before calling board_init_r(). This also ensures that
  

•  variables placed in BSS can be shared between board_init_f() and
  

•  board_init_r().
  

You should probably depend this option on "ARM", as your implementation is currently only for this arch. Otherwise users might expect this to work on other platforms as well.

Thanks, Stefan