It is explained in [e300CORERM] at chapters 5.2.3, 5.5.1.1 and 8.3.3.
Clearly, the vector offset is 0x100 and the exception prefix can
be 0 or
0xFFF00000, depending of the MSR[IP] bit.
So, yes, I'm sure the value of hreset_vector must be 0x100.
But hreset_excp_prefix can change. It could be another patch.
Interesting. That's different from 970.
On 970, you can have the same effect (well, more general) by
changing HIOR.
About the prefix initialization, the datasheet says it is
"determined by
MSR[IP]". and is "determined by the state of the msrip signal".
But I don't
understand what is the msrip signal and how MSR[IP] is changed (is
it related
to msrip ?). Do you have an explanation for this part ?
Your code can change MSR[IP]; there is also a strapping pin that is
sampled on HRESET (and copied to MSR[IP]).
Segher
