TLB miss handlers
Espen Skoglund
esk at ira.uka.de
Fri Jan 28 04:24:22 PST 2005
[Christian Hildner]
> Hi,
> ld8 r21=[r21] // check VHPT tag
> ^^^^^^^^^^
> Are you sure you cannot enter a nested TLB miss fault here on IA64
> implementations that do not have the VHPT walker implemented? You
> wouldn't get fault 0x0000 since there is no walker that throws that
> fault.
Er... I can't remember seeing anywhere that implementing the VHPT
walker in the CPU is optional. Anyhow, I'd imagine that the VHPT is
located in a place that is backed by a pinned TR. But I'm not really
familiar with FreeBSD internals, so...
eSk
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