-- Original Message --
Date: Tue, 23 Mar 2004 10:31:22 -0800
From: Eugene Surovegin <redacted>
To: Wolfgang Grandegger <redacted>
Cc: linuxppc-embedded@lists.linuxppc.org
Subject: Re: IBM 440GX, Ocotea...



On Tue, Mar 23, 2004 at 12:02:31PM +0100, Wolfgang Grandegger wrote:

quoted

we are currently trying to understand which PPC Linux
kernel tree is best suited for the IBM 440GX on the
Ocotea eval board. We would like to support the 405GP
and 440GP as well.

linuxppc-2.4

quoted

The Ocotea 440GX board seems to be supported in the
"linuxppc_2_4_devel" tree. Is this board configuration
up-to-date and still maintained?

unlikely. linuxpp_2_4_devel is officialy "dead" tree :).

quoted

A more up-to-date implementation seems to be in the
"linuxppc-2.4" tree. Are there some open issues or known
problems?

New UIC mode isn't supported yet.
Work on GigE support is still not finished yet.

quoted

I realized that the L2 cache has been disabled
recently:

  $ cat arch/ppc/platforms/ocotea.c
  ...
  /* Disable L2-Cache due to hardware issues */
  ibm440gx_l2c_disable();

Does this mean that the L2 cache is unusable on current
revisions of the chip? [That's why we would like to use
this chip.]

Yes, we found problems with current chip revisions (A & B).
Ask your IBM contact for more information.

quoted

Does this tree support the 405GP and 440GP as well?

Yes.

quoted

Could
anybody make some comments on the stability? We currently
use the "linuxppc_2_4_devel" tree for these processors
with little problems.

I'm using linuxppc-2.4 as of 2.4.21 in production for 440GP,
440GX, 405GPr, 405EP based hardware.

Great, thanks a lot for the clearification. Unfortunately there
is some confusion and disappointment on what board is well
supported in what tree.

Wolfgang.


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