[coreboot] Gigabyte M57SLI - 4MB Chip - LAB doesn't boot like expected

[Harald Gutmann]

Am Samstag, 24. Mai 2008 14:22:43 schrieb Carl-Daniel Hailfinger:
> On 24.05.2008 13:00, Harald Gutmann wrote:
> > Am Freitag, 23. Mai 2008 20:23:11 schrieb Carl-Daniel Hailfinger:
> >> Try this:
> >> Report actual and wanted LZMA decompression scratchpad size:
> >> Signed-off-by: Carl-Daniel Hailfinger
> >> <c-d.hailfinger.devel.2006 at gmx.net>
> >
> > The patch worked, i had to set the decoder scratchpad size to 50335340,
> > which seems quite much to me, but there was no more error on
> > "Uncompressing to RAM".
>
> The maximum scratchpad size right now is ~512k. Anything above that will
> corrupt memory.
That is a good reason why it doesn't work here.


> > Acked-by: Harald Gutmann <harald.gutmann at gmx.net>
> > To add that also into the coreboot v2 reprository, and not just in v3.
> >
> > But booting with LAB didn't work, the last lines which i get for now are:
> > "rom_stream: 0xffc00000 - 0xfffe7fff
> > Uncompressing to RAM 0x0100000"
> >
> > Maybe, as i set the scratchpad size that high, it takes really long to
> > decompress the image to the RAM. I waited about 2 minutes and nothing
> > more happened, i think that should be enaugh time to decompress 4MB into
> > the RAM.
> >
> > Any idea what is wrong with my image, or what could be done to get debug
> > informations?
>
> The scratchpad has to fit in a special area below 1 MB. Considering
> various other constraints, the maximum size is probably around 512k. A
> bigger scratchpad will clobber interrupt vectors and wrap around to the
> top of the 4 GB address space. The decompressor will then write to the
> area occupied by ROM (writes discarded) and non-RAM areas (writes
> discarded). That's a bad thing.
>
> If a compressed payload needs more than 512k scratchpad, the payload is
> most likely corrupt.

how can i check if the payload is corrupt or not?
the uncompressed payload, the compressed one and an manually uncompressed (
lzma-utils from http://tukaani.org/lzma/) are included here:
http://rapidshare.com/files/117291876/payloads.tar.bz2.html


> Regards,
> Carl-Daniel
Regards,
Harald