Hello all,

I am using ALPHA FS and O3 cpu model, and I am trying to modify the code to
add a second level TLB.

My first question is, take the instruction TLB as an example, in the
original implementation, if there is a TLB miss
during the fetch stage, a noop instruction will be built and the fault will
be handled during the commit stage using
OS traps. Does this mean I need to modify both TLB and CPU code to include
a second level TLB?

Secondly, how to handle the timing changes when a second level TLB is
added?

Thanks,

Jiachen

-- 
Sincerely,
Jiachen Xue
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