Re: [PATCH] ARM: OMAP2+: Warn about deprecated legacy booting mode

[Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>]

On Wed, 03 Dec 2014 17:52:04 +0100, Pavel Machek wrote:

> On Fri 2014-11-28 12:27:19, Tony Lindgren wrote:
>> * Pali Rohár <pali.rohar@gmail.com> [141127 03:34]:
>> > On Thursday 27 November 2014 02:12:04 Tony Lindgren wrote:
>> > > 
>> > > Thinking about this probably the best long term solution is to pass
>> > > optional board_revision in the kernel cmdline that can be parsed
>> > > early and copied to system_rev variable.
>> > > 
>> > > 
>> > Not possible. Our bootloader is closed & proprietary. I tried to
>> > replace it with u-boot I was not able to do that. So we will use that
>> > Nokia closed bootloader forever and it can provide data only in ATAG
>> > structure.
>> 
>> I'm using just mainline u-boot flashed as kernel for nolo that then
>> loads the kernel.
>> 
>> For passing the board revision using the pass through u-boot is
>> probably the best long term solution. U-boot can read the ATAGs from
>> nolo and modify the .dtb for the revision information.
>> 
>> Are you saying there are some issues with that?
> 
> Plenty :-).
> 
> Basically, u-boot is great for production (select one of kernels and
> boot it), but pretty much unusable for development:

You might want to look at kexecboot project. Basically it is an initramfs
payload bundled with a Linux kernel that can further choose which kernel
to load. USB is not supported (afair), but one might add that - it's
just a Linux environment in the end.

-- 
With best wishes
Dmitry

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