[U-Boot] Can't boot DaVinci EVM with Green Hills' Integrity OS

[Idan Noti]

I'v tried this but it does not change anything.
Is there a way to have the u-boot run in a step-by-step mode? In order to
try and eliminate the problematic initialization?

Thanks,

On Tue, Mar 31, 2015 at 10:03 AM, Jeroen Hofstee <jeroen at myspectrum.nl>
wrote:

> Hello Idan,
>
> On 31-03-15 06:02, Idan Noti wrote:
>
>> Why do you think caches have something to do with the problem?
>>
>
> By booting the image with the bootelf command you jump to it with some
> caches
> still enabled / not flushed (which is likely not what your debug interface
> does and
> your kernel might not really like that). A FreeBSD kernel doesn't / didn't
> at least and
> wouldn't boot.
>
> I never checked, but I guess Linux doesn't like it either, but since it is
> typically booted
> by a bootm / bootz command it goes through e.g. arch/arm/lib/bootm.c,
> which calls
> cleanup_before_linux in arch/arm/cpu/arm926ejs/cpu.c, all caches are
> disables and
> flushes before jumping into it.
>
> Of course I don't know if this is related to your problem, but it cannot
> do any harm to
> keep caches off until you have the board properly booting.
>
>  Also, how do I config the compilation to disable caches? The only
>> configuration I'm aware about it modifying the header file:
>> $(uboot_folder)/include/configs/davinci_dvevm.h
>>
>
> Yup, see README and doc/README.arm-caches. At least below knobs are
> documented.
> You can simply define these in mentioned file.
>
>  CONFIG_SYS_ICACHE_OFF - Do not enable instruction cache in U-Boot
>  CONFIG_SYS_DCACHE_OFF - Do not enable data cache in U-Boot
>  CONFIG_SYS_L2CACHE_OFF- Do not enable L2 cache in U-Boot
>
> Regards,
> Jeroen
>