Updated PPC support

Greg Watson gwatson at lanl.gov
Wed Jan 28 12:33:01 CET 2004

At 10:25 AM -0700 1/28/04, Li-Ta Lo wrote:
>On Wed, 2004-01-28 at 10:03, Greg Watson wrote:
>>  For those interested in PPC issues,  I have updated support for the
>>  Motorola Sandpoint (G4 processor) in the V2 tree. Over the next few
>>  days I will tidy up a few remaining things, but as of now I have the
>>  Sandpoint booting a 2.4.24-pre2 kernel.
>>  Regards,
>What have you done ? You said you can't boot it

A lot can happen in a day...

I've actually had LinuxBIOS loading a kernel for a while, but I was 
trying to get a kernel that would work on the Sandpoint.

The main problem was that the startup code was running out of stack 
space while trying to decompress the kernel (inflate returns 
FFFFFFFD!). Since the stack size is hardcoded in some assembly, it 
took a while to work out this was the problem.

The next thing was that LinuxBIOS was not initializing the superio 
properly, so even though the kernel re-does this initialization, it 
was happening too late and causing all kinds of screwy behavior. I'm 
fixing this now.


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