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RE: [microblaze-uclinux] Video tutorials - follow on questions
About point 2 you can try to keep protected a Spartan3 design by an
external device like DS2432. The bitstream has no scrambling/encryption
but it doesn't work without the external key.
Maurizio Tosatto
________________________________
From: Jim Law [mailto:jlaw@irispower.com]
Sent: Friday, July 08, 2005 3:03 PM
To: microblaze-uclinux@itee.uq.edu.au
Subject: [microblaze-uclinux] Video tutorials - follow on questions
Hello Dave,
Just got through watching the videos, and thank you again for doing
this. Definitely pulled a lot of ideas and issues together for us.
I have a couple of follow-on questions that arose during the videos:
1. When you are copying the uClinux kernal image from the RAM to the
FLASH, what format is it in and where is it actually going? I thot that
the FLASH was used under the JFFS2 file system to be a mountable drive
under uClinux, while the .BIT file loaded to RAM was raw binary. What
am I missing here? Is the FLASH somehow partitioned? Is so, where is
that defined?
2. You mention that for IP protection, you can encrypt the bitstream
and use a matching DES key set in battery-backed storage in the FPGA.
Does the Spartan-3 support this? If not, what experiences have you had
in protecting IP on that platform?
Thanks,
Jim Law
Iris Power Engineering
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