Re: [PATCH][2.4.27] PowerPC 745x data corruption bug fix

[Adrian Cox]

On Mon, 2004-08-16 at 10:06, Paul Mackerras wrote:
> Adrian Cox writes:
> 
> > Pages should be marked coherent for the MPC106 as well as the MPC107,

> The MPC106 has an internal cache?  I had a quick look in the 106 and
> 107 manuals and I couldn't see in either one where it talks about a
> cache.  Do you know where I should be looking?

MPC106UM, section 8.1.3.1: PCI to System Memory Read Buffer (PCMRB)
MPC107UM, section 12.1.3.1.1: PCI to Local Memory Read Buffer (PCMRB)

It's not a big cache, but it's large enough to hold the transmit
descriptor of a pcnet32 ethernet. It's easy to miss this in the manual,
and I only noticed it when my first 7450 board wouldn't work with NFS
root.

- Adrian Cox
Humboldt Solutions Ltd.


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