Problems with NSLU2 and U-Boot

[Stanislav Sedov]

On Tue, 07 Oct 2008 02:40:39 +0100
Bruce M Simpson <bms at incunabulum.net> mentioned:

> I am trying to get the NSLU2 to natively boot FreeBSD from flash itself 
> w/o any TFTP server.
> 
> Thanks to Rink and Rafal's help, I managed to get U-Boot installed and 
> working on the Linksys NSLU2.
> Using hints from the OpenMoko page, I generated a U-Boot image from an 
> NSLU2 kernel build from -CURRENT, and managed to boot it over the 
> network -- however -- the kernel is not coming up.
> mkimage hints here: http://wiki.openmoko.org/wiki/FreeBSD
> 
> If I add 'options VERBOSE_SYSINIT' to the kernel config, I can see that 
> the kernel is going off into space... right after init_turnstile0() is 
> called.   MMU problems?
> 
> [I had to track this down with nm, as addr2line seems to only print the 
> first patch.]
> 
> I saw similar symptoms when trying to boot with the simple ELF 
> trampoline, from both RedBoot and U-Boot on the NSLU2. An ELF kernel 
> loaded into RedBoot seemed to work just fine, providing the load address 
> was given explicitly.
> 
> [Recall: The problem with RedBoot on the NSLU2 is that its boot-time 
> settings cannot be changed, it is locked into executing a Linux-style 
> image at a hard wired address, so a change of firmware may be necessary 
> in order to boot FreeBSD natively on that platform.]
> 

Are you sure that u-boot loads your kernel to correct address. Have
you tryed loading a plain ELF image (or binary) and jumping to entry
point?

-- 
Stanislav Sedov
ST4096-RIPE
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