[U-Boot] [PATCH 00/14] Nokia RX-51 support

[Marek Vasut]

> On Wednesday 25 January 2012 21:56:37 Marek Vasut wrote:
> > > On Wednesday 25 January 2012 19:20:01 Marek Vasut wrote:
> > > > So why not just replace the bootloader right away?
> > > 
> > > Booting process on n900:
> > > 1. Omap bootrom
> > > 2. Nokia X-Loader
> > > 3. Nokia NOLO Bootloader
> > > 4. Linux kernel
> > > ...
> > 
> > To make it clear, I own N900 myself ;-)
> > 
> > > Nokia X-Loader and NOLO are stored in first nand part. It has size
> > > 128kB. Nokia X-Loader is signed (size 14.5kB), so cannot be replaced.
> > > NOLO bootloader is not signed (so theoretically can be replaced), but
> > > size is limited to 113kB. I do not know how to compile U-Boot binary
> > > with size < 113kB...
> > > 
> > > Size of part where is stored linux kernel has 2MB and it is enought for
> > > U-Boot with kernel image (~200kB + ~1.6MB). Also U-Boot can boot kernel
> > > from eMMC/SD.
> > 
> > You didn't answer my question, so again ... why can't you replace NOLO?
> > Because there's the 113kb limit? Use SPL then.
> 
> I only tried to boot U-Boot in qemu wich increased boot part - but not
> worked. (NOLO in qemu can boot u-boot without problems). So NOLO do some
> extra work - which I do not know... Also limit is problem to test on real
> n900.

What do you mean? Did you crack yours open? Can you connect JTAG to the device? 
I didn't check on mine.