Re: looking for documentation on porting Linux to PowerPC platforms

Hi Benjamin!

quoted

Is there a document somewhere describing the basics about the PowerPC
platform and Linux, i.e.

Not really afaik, I should probably do this though ;)

It would be really useful to have something like that.

quoted

a) how to boot linux (can I just branch to the the address where I loaded t
he
image into ram or do I need to setup registers / data structures beforehand?)

Custom hardware ? Well, that pretty much depends how your implementation
of early init & setup_arch behaves. The kernel itself can be loaded at
almost any address on most ppc32 CPUs, it will relocate itself, though
you probably want to make sure you enter it with MMU translations
disabled.

What about caches? Do you care whether caching is enabled or not?

--

Regards
 Abraham

The giraffe you thought you offended last week is willing to be nuzzled today.

__________________________________________________________
 Abraham vd Merwe - 2d3D, Inc.

 Device Driver Development, Outsourcing, Embedded Systems

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 Email: abraham@2d3d.co.za         Kenilworth, 7700
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What about caches? Do you care whether caching is enabled or not?

Not really. We do enable L1 on "common" desktop CPUs, and machine
specific code may do more with L2 or L3 if any. It's up to you to
either setup additional caches prior to entering the kernel, or from
your machine init code.

Ben.


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