* "sc" ...
@ 2002-01-25 5:53 Venkat Raghu
0 siblings, 0 replies; only message in thread
From: Venkat Raghu @ 2002-01-25 5:53 UTC (permalink / raw)
To: linuxppc-embedded
Hi,
I think in order to generate system call exception
using instruction "sc", we have to update EVPR
with "mtspr". So that corresponding handler will be
called based upon the contents of EVPR.
But in source code that I am seeing has something
like:
mr r6,r3
ori r3,r5, value
li r0,somevalue
sc
....
...
Even if EVPR is not updated with any value a
Machine check interrupt is being generated.
1) Kindly clarify how control goes to machine check
interrupt handler, is it beacuse of call to "sc"
or some other event triggers interrupt?
2) Why "sc" is being called without setting EVPR.
I have not subscribed to this list. Kindly mail me
at venkatraghu2002@yahoo.com
Thankyou.
Venkat.
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2002-01-25 5:53 "sc" Venkat Raghu
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