Custom kernel under RPI

[Loïc BLOT]

Hi tim,
it's a freebsd image from raspberrypi.org website (last month), but i
would have some custom kernel drivers, then i get freebsd -current and
compile all kernel sources. I have three partitions 1 MSDOS and two
bsdlabels with two slices.
-- 
Best regards,
Loïc BLOT, 
UNIX systems, security and network expert
http://www.unix-experience.fr




Le samedi 16 mars 2013 à 12:21 -0700, Tim Kientzle a écrit :

> On Mar 16, 2013, at 10:54 AM, Ian Lepore wrote:
> 
> > On Sat, 2013-03-16 at 18:39 +0100, Loïc BLOT wrote:
> >> Ok, cross compile is done, i have a modular kernel, but same error
> >> appears when i boot. Kernel is blocked at those lines:
> >> 
> >> Kernel entry at 0x100100 ..
> >> Kernel args: (null)
> >> 
> >> 
> > 
> > If it doesn't say anything about what FDT it is using before it says
> > Kernel Entry, then you aren't using the latest ubldr code.  
> 
> Loïc:   How did you set up the MSDOS partition?
> 
> The details of how we boot FreeBSD have changed some
> over the last couple of months; if you used some old
> instructions to set that up, you may not have the right
> boot loader configuration to correctly boot the current kernel.
> 
> 
> > If it doesn't have the device tree data, it will lock up exactly as
> > you're experiencing (without the device data the kernel doesn't have
> > enough info to even print an error message).
> > 
> > A quick way to see if that's the problem is to add to the kernel config:
> > 
> > options 	FDT_DTB_STATIC
> > makeoptions     FDT_DTS_FILE=bcm2835-rpi-b.dts
> 
> 
> Keep in mind that Ian's advice here (to compile the FDT
> into the kernel) should only be used for debugging.
> 
> On RPi, the boot loaders edit the FDT before
> handing it to the kernel.   A compiled-in FDT won't
> properly reflect a few details that the boot loaders
> know about.
> 
> If the boot chain is all working properly, a compiled-in
> FDT is not needed and not recommended.
> 
> Tim
> 
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