Raspberry Pi questions

[Alex T.]

Apologies for hijacking the thread, but do same instructions apply to
pandaboard to get a fixed deterministic mac address?
Thank you.

On 25 December 2012 at 12:37, Oleksandr Tymoshenko <gonzo at bluezbox.com>
wrote:

>
> On 2012-12-25, at 12:21 PM, Ian Lepore <freebsd at damnhippie.dyndns.org>
> wrote:
>
> > I got my RPi running this morning, more or less.  I used the boot
> > partition from the latest image at http://www.peach.ne.jp/archives/rpi/
> > but I'm loading my own custom built kernel and world.  I have a few
> > questions...
> >
> > Can I get ubldr to load a kernel using tftp, bootp, etc?
>
>     Yes. ubldr checks U-Boot devices (SD and net), then tries to locate
> FFS partition on SD card and if fails - falls back to NFS/bootp. You can
> fetch
> my image, boot partition there contains ubldr, FDT blob, config.txt and
> boot scripts:
>
> http://people.freebsd.org/~gonzo/arm/rpi/freebsd-pi-r243778.img.gz
>
> > Are there any
> > docs on ubldr in general?  (Right now I'm skipping ubldr and using
> > u-boot's DHCP command to load the kernel.)
> No, there are BSDCan slides by raj@ but as far as I know that's the only
> bit of
> documentation for ubldr.
> http://www.bsdcan.org/2008/schedule/attachments/49_2008_uboot_freebsd.pdf
>
>
> > My RPi comes up with a random ethernet mac address on every boot, but
> > when I look at the driver code it seems that there should be an address
> > stored in an eeprom.  Do I have to program that myself?
>     SMSC might or might not have EEPROM. The one in RPI does not
> have EEPROM so it's driver responsibility to set MAC address. There are two
> options: get it from FDT blob or generate random. On Raspberry Pi it works
> like this:
> firmware loads FDT blob at fixed address, fixes up board-specific info
> like memory sizes,
> MAC address, board serial/revision. Then it loads u-boot, u-boot loads
> ubldr, ubldr
> generates kernel meta-data, loads kernel and passes control to the kernel.
> Kernel gets FDT blob from meta-data and uses it to determine MAC address.
> In order to make ubldr recognize FDT blob you'll need  "fdt addr 0x100" in
> /boot/loader.rc
> either on SD card FFS partition or on your NFS root.
>
> >
> > When I try to use an nfs-mounted root I get "Mounting from
> > nfs:172.22.42.240:/rpi failed with error 19." but if I mount root from
> > the sdcard then after it gets to multiuser mode I can manually nfs-mount
> > the same directory.  Has anybody got an nfs-mounted root working?
>     This is most likely due to NFS version mismatch. We have nfs and oldnfs
> for NFSv4 and NFSv3.  I have working NFS root for raspberry pi. My kernel
> config:
>
> options        NFSCL                   #Network Filesystem Client
> options        NFS_ROOT                #NFS usable as /, requires NFSCLIENT
> options        BOOTP_NFSROOT
> options        BOOTP_COMPAT
> options        BOOTP
> options        BOOTP_NFSV3
> options        BOOTP_WIRED_TO=ue0
>
> I use FreeBSD 9.0 as NFS server.
>
>
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