With generic board, U-Boot expects to have a regions of memory to use before relocation for the stack and early malloc(). Blackfin works around this and 'accurately guesses' the final location of several regions very early during boot. It also uses BSS space to hold global_data.
It would be better if Blackfin followed other boards and uses the existing early allocation functions. Since RAM is set up quite early, we can put things in RAM instead of the small scratch space. As a first step, define the top of the early memory region: CONFIG_SYS_EARLY_SP_TOP. Signed-off-by: Simon Glass <[email protected]> --- arch/blackfin/Kconfig | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig index 0a2fb4d..934e089 100644 --- a/arch/blackfin/Kconfig +++ b/arch/blackfin/Kconfig @@ -4,6 +4,15 @@ menu "Blackfin architecture" config SYS_ARCH default "blackfin" +config SYS_EARLY_SP_TOP + hex "Top of early memory region" + default 0x100000 + help + Before relocation U-Boot needs some space for the stack and the + early malloc() implementation. This is an arbitrary location but + since U-Boot relocates to the top of RAM it should be fairly + low to avoid conflict. + choice prompt "Target select" optional -- 2.8.0.rc3.226.g39d4020 _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
