Arm Development Studio forum Data abort

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Data abort

Note: This was originally posted on 30th January 2010 at http://forums.arm.com

Hi ,
I am working on arm from past few momths.I have one question that in ARM why unalligned address operation will give data abort ?and is this thing will be happened for any special case ?Pleae help me to know actually when and why it will be happened. I came across thorugh some sites but still not get a clear picture.

Second thing if a value is not found then MMU misses the caches but how will i know the misses happened.?

I am looking forward to you .

Thanks
Mac