[Cryptech Tech] Common API structure for cores

[Joachim Strömbergson]

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Aloha!

Paul Selkirk wrote:
> I've been thinking along similar lines, but didn't want to meddle
> too much in your cores to do it. Getting the apps to use a common set
> of symbolic name was the first step, then we can tweak the
> underlying memory map.
> 
> For the RNG cores, ctrl is at 0x10 and status is at 0x11, for no 
> discernible reason. AES puts ctrl at 0x08, but status at 0x0a (0x09 
> being 2 bits of config, which might be rolled into ctrl). The big 
> offender is ChaCha, which doesn't have name or version registers,
> and puts ctrl at 0x00 and status at 0x01.
> 
> The individual ctrl and status bits are somewhat core-dependent, but 
> should be harmonized where possible.

Agreed. And yes. it is me that has not been following my own standards.
I'll add a ticket to clean up my mess.

And yes, harmonizing bits are hard. But having ready at bit 0 in the
status register should be possible to do in all cores. And init/start at
bit 0 in the control register. Then you can at least fire away and check
status in a core.

- -- 
Med vänlig hälsning, Yours

Joachim Strömbergson - Alltid i harmonisk svängning.
========================================================================
 Joachim Strömbergson          Secworks AB          joachim at secworks.se
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