Re: Caching in the MPC107

On Mon, Sep 09, 2002 at 03:23:24PM +0100, Adrian Cox wrote:

I've just been debugging an interesting problem with a new board that
uses a MPC107 bridge with a 7445 processor. The symptoms were that the
ethernet device never saw updated transmit descriptors unless another
bus master was active in the system.

[snip]

My current thinking is to produce a patch which introduces a new option:
CONFIG_CACHING_HOSTBRIDGE which boards combining the MPC107 and the
MPC7450 can set. This will probably be needed for Motorola's Valis or
Gyrus PMCs.

Are there any more details you can give?  I've got a Sandpoint X3 and
Valis (with a 7455 CPU), and aside from the MPC107 Errata #18 problem
(http://e-www.motorola.com/brdata/PDFDB/docs/MPC107CE.pdf) which is now
fixed, I haven't seen any problems here.  Do you have access to this
board and a 7455?

--
Tom Rini (TR1265)
http://gate.crashing.org/~trini/

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