[PATCH] (Longhaul 1/5) PCI: Protect bus master DMA from Longhaul by rw semaphores

Rafał Bilski
2006-06-29T14:13:04Z

> If I understand correctly, trouble occurs when the processor tries to
> snoop? Would disabling (via MSR) and flushing the caches before changing
> the frequency help in that case?
>
> Groeten,
> Bart
>

CPU is VIA C3 in EBGA "Nehemiah" core 6.9.8.
I'm using flush_cache_all(). Is there anything more powerfull?
I'm using MSR_VIA_FCR.
I can disable L2 cache (or at least I think so) - this doesn't help.
I can't disable L1 cache - processor stops when I'm trying to set
I-cache or D-cache disable bit.

Thanks
Rafał

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