Re: Bug#927892: grub-ieee1275-bin: Please add bootinfo.txt for sparc and sparc64
On 25/04/2019 05:18, Mark Cave-Ayland wrote:
> On 24/04/2019 23:05, John Paul Adrian Glaubitz wrote:
>
>> Okay, so I have managed to build an image now, that's the good news:
>>
>>> https://people.debian.org/~glaubitz/debian-10.0-sparc64-grub-NETINST-1.iso
>>
>> The bad news is, it doesn't boot yet:
>>
>> {0} ok boot cdrom
>> Boot device: /virtual-devices@100/channel-devices@200/disk@1 File and args:
>> ERROR: /virtual-devices@100/channel-devices@200/disk@1: Can't open disk label package
>>
>>
>> Can't open boot device
>>
>> {0} ok
>>
>> With the attached d-i patch, debian-installer builds with GRUB instead of SILO
>> and produces a sparc64.elf boot image plus a grub.cfg configuration file.
>>
>> The other patch shows the current modifications to debian-cd.
>>
>> I assume the only thing that is missing is the correct parameter to mkisofs
>> so that it builds a bootable image, but I haven't looked that up yet. And we
>> don't need to create the directory "sparc64-ieee1275", it stays empty anyway
>> as opposed to ppc64el.
>
> FWIW I think you're pretty close here: as you say, you just need to fix the bits
> which set up a sun partition label and inject the bootloader. So the bit you need to
> re-enable to get this to work should be this:
>
> add_mkisofs_opt $CDDIR/../$N.mkisofs_opts "-G boot1/boot/isofs.b -B ..."
>
>>From looking at your previous grub patches and the genisoimage man page then you need
> to point this towards the a.out binary made from
> grub/grub-core/boot/sparc64/ieee1275/boot.S which I think reading through
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=921249 should be cdboot.img?
>
> The mkisofs above should create a sun partition layout and inject the a.out binary
> into all slices so it is executed with "boot cdrom". This will then use the CIF to
> locate the grub partition via the PROM bootpath property and the open the ISO9660
> device in the PROM to locate the grub kernel.
>
> Note: this assumes that the PROM can read ISO9660 devices directly rather than
> requiring a UFS filesystem - can all 64-bit SPARC PROMs do this? The above diff
> suggests that this was the case for SILO.
Oh wait, now I see it: SILO's isofs.b also includes a mini-ISO9660 driver to enable
the PROM to read from the CDROM. So given that grub on SPARC64 is already working for
a disk install then this aspect should already have been solved i.e. either the grub
kernel is located on a separate UFS slice within a sun partition or somewhere there
is an enhanced boot.S with another FS driver?
ATB,
Mark.
Reply to: