Richard Cochran <[email protected]> writes:
> I was really talking about the IXP465 with its PTP function. The Intel
> devel board had a silicon bug making the PTP function useless. But
> even if the bug got fixed, still the PTP function was very limiting.
>
> I never got any feedback about the IXP465 PTP stuff, and so I doubt
> whether anyone is really using the Linux PTP driver on the IXP465, but
> you never know.
Ah, OK.
I have just checked, Intel's spec update says IXP46x steppings A1 and A2
are fixed. PTP on 46x-A0 is broken.
42x and 43x don't support PTP.
OTOH there is interesting stuff there:
Problem: The A-0 and A-1 stepping of the Intel® IXP45X/IXP46X Product Line of
Network
Processors can enter a condition whereby the system locks up when
certain
combinations of memory accesses occur nearly simultaneously.
After more extensive investigation, it has been identified that the
lockup condition can
be caused by near-simultaneous accesses to 1 or 2 cache lines. The
accesses to the
cache lines must be performed by the Intel XScale processor, South
AHB, and/or North
AHB for the lockup to happen.
Hmmm...
--
Krzysztof Halasa
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