[U-Boot] Avoiding reload on ARM U-BOOT

[yehuda yitchak]

Hello again

Sorry for slipping the u-boot list e-mail address

i understand the benefit of relocating u-boot to the end of DRAM but in
systems where boot time is critical this redundant copy is undesirable.
anyway i understand there is no official way of avoiding it.

One more question i have is regarding the SPL Framework. i read all the
documentation i could find about the SPL but i don't think i fully
understand the usage of this framework. since i noticed several SPL Macros
around the relocation code i suspected it has something to do with
relocation or u-boot running as secondary boot program

i would appreciate a short explanation when CONFIG_SPL or CONFIG_NAND_SPL
should be set ?

Thanks again

Yehuda

On Fri, Feb 3, 2012 at 10:15 AM, Marek Vasut <marek.vasut at gmail.com> wrote:

> > Hello Marek
>
> ALWAYS CC U-BOOT ML
>
> >
> > Thank you for your answer
> >
> > My SOC (Marvells Armada Controller) uses a bootrom code to copy to
> > initialize the DRAM and to copy the u-boot image. so the entire DRAM init
> > and copy sequence in u-boot is redundant.
>
> I see. I know about this soc's bootrom. Though it still can't place the
> bootloader properly to the end of DRAM.
>
> >
> > in previous version there was a way to avoid this. i find it limiting
> that
> > there isn't a way in the new version.
> >
> > Why would i want to relocate the code anyway ?
>
> See above, to place it to the end of DRAM.
>
> >
> > Yehuda
> >
> > On Thu, Feb 2, 2012 at 11:34 AM, Marek Vasut <marek.vasut at gmail.com>
> wrote:
> > > > Hello everyone
> > > >
> > > > im trying to port u-boot 2011-09 to a new board with an arm based SOC
> > > >
> > > > i found that u-boot will always relocate the code even if it is
> placed
> > > > already in DDR which is the case with my SOC.
> > >
> > > The u-boot is always relocated to the end of the DRAM, which is likely
> > > what you
> > > want. And it's quite a quick process. So if you are manufacturing your
> > > soc with
> > > various size of RAM, you want the relocation to happen. What SoC is
> that
> > > anyway?
> > >
> > > > is there any clean way to avoid relocating the u-boot ? does the
> > > > various SPL configs have something to do with that ?
> > >
> > > Not really and you don't want this to happen.
> > >
> > > M
> > >
> > > > if yes which one should i define ?
> > > >
> > > > Thanks in advance
> > > >
> > > > Yehuda
>