On Sun, 2013-05-19 at 12:33 +0100, Ian Campbell wrote:
> On Sat, 2013-05-18 at 19:00 +0100, Tixy wrote:
> > On Sat, 2013-05-18 at 11:40 +0100, Ian Campbell wrote:
> > > Hi Tixy,
> > >
> > > On Fri, 2013-05-17 at 09:24 +0100, Tixy wrote:
> > > > Does anyone know of any foolproof method of getting Wheezy running on a
> > > > Dreamplug?
> > > >
> > > > I believe this requires upgrading U-Boot (to get device-tree support/fix
> > > > L2 cache issue?) but when I tried upgrading U-Boot by flashing it from
> > > > U-Boot I ended up with an expensive brick. Now this may have been user
> > > > error, but I don't want to risk bricking the new DreamPlug I bought
> > > > without instructions which are known to work. Or, perhaps the safest
> > > > thing is to load a new U-Boot from the old one if that's possible? And
> > > > in desperation I may even resort to writing a shim to make the Wheezy
> > > > kernel load with the stock U-Boot.
> > >
> > > You can do this with devio. My NOTES file says (I've not tried this
> > > recently, but I'm reasonably sure it worked when I made the notes):
> > > $ (
> > > # disable l2 caches
> > > devio "wl 0xee3f3f11,4" # mrc 15, 1, r3, cr15, cr1,
> > > {0}
> > > devio "wl 0xe3c33501,4" # bic r3, r3, #4194304
> > > ; 0x400000
> > > devio "wl 0xee2f3f11,4" # mcr 15, 1, r3, cr15, cr1,
> > > {0}
> > >
> > > # flush caches
> > > devio "wl 0xe3a03000,4" # mov r3, #0
> > > devio "wl 0xee073f17,4" # mcr 15, 0, r3, cr7, cr7, {0}
> > >
> > > cat vmlinuz-3.2.0-3-kirkwood
> > > )> vmlinuz.devio
> > > $ mkimage -A arm -O linux -T kernel -C none -a 0x00008000 -e
> > > 0x00008000 \
> > > -n "kernel 3.2.0-3-kirkwood" -d vmlinuz.devio myuImage
> > >
> > > This ought to work equally well with the kernel file provided by the
> > > installer.
> >
> > If does if you append the device-tree to the kernel as well. I ended up
> > trying to extend the devio shim for device-tree and was having problems,
> > then saw the Debian Kirkwood image has CONFIG_ARM_APPENDED_DTB :-)
> >
> > So for others finding this thread, I ended up with this method to
> > convert the installer uImage into one which will boot on the DreamPlug
> > with the stock U-Boot which ships on the DreamPlug...
> >
> > (
> > # disable l2 caches
> > devio "wl 0xee3f3f11,4" # mrc 15, 1, r3, cr15, cr1, {0}
> > devio "wl 0xe3c33501,4" # bic r3, r3, #4194304 ; 0x400000
> > devio "wl 0xee2f3f11,4" # mcr 15, 1, r3, cr15, cr1, {0}
> >
> > # flush caches
> > devio "wl 0xe3a03000,4" # mov r3, #0
> > devio "wl 0xee073f17,4" # mcr 15, 0, r3, cr7, cr7, {0}
> >
> > # remove uboot header from the uImage we want to boot
> > dd if=original-uImage bs=1 skip=64
> > # append dtb to kernel image
> > cat kirkwood-dreamplug.dtb
> > )> vmlinuz.devio
> >
> > mkimage -A arm -O linux -T kernel -C none -a 0x00008000 -e
> > 0x00008000 \
> > -n "kernel 3.2.0-4-kirkwood" -d vmlinuz.devio
> > new-uImage
> >
> > I got the dtb file from linux-image-3.2.0-4-kirkwood_3.2.41-2_armel.deb
>
> You may have (harmlessly) ended up appending the DTB twice since I think
> the installer uImage has it already there...
It doesn't, I just checked, and if it did have the DreamPlug dtb it
wouldn't work on the iconnect which also has a dtb in the kirkwood
kernel package and so I assume is also supported.
--
Tixu
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