Re: MOL

[Samuel R. <sa...@ib...>]

On Thu, Apr 19, 2001 at 10:58:04PM +0200, Roman Zippel wrote:
> Hi,
> 
> Samuel Rydh wrote:
> 
> > - Does the BK kernels at fsmlabs contain working APUS support?
> 
> No, although I started to send Cort patches, but it takes ages... :(
> 
> > - Any special quirks? In particular, why is the kernel
> > *not* located at physical address 0?

The exception vectors then, are they 

> 
> The chipram is already there and it's to slow to be usable for normal
> memory. Patches are available to get the APUS kernel booting 
> with MOL enabled.

Actually, the hooks which used to be present in the 2.4 kernel
are no longer used by MOL. The latest kernel only exports a few
extra symbols. Instead, MOL hooks the very first instruction 
of each exception vector (this makes the low-level code 
system independent).

So... where are the exception vectors on APUS? Are there
branches from 0xN00 to fastmem? I guess this would imply
that the kernel image is always in the range of an absolute
branch (which would simplify things quite a bit).

Cheers,

/Samuel


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