[Cryptech Tech] Common API structure for cores

[Joachim Strömbergson]

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Aloha!

Paul: Thanks for great work with the unified HAL.
One thing I would like to suggest is that we start unifying some of the
addresses and even bits in the cores. We are almost there, but some
cores will have to be adjusted, which means update of testbenches and
some SW.  What I'm thinking of is this:

// addresses and codes common to all cores
#define ADDR_NAME0              0x00
#define ADDR_NAME1              0x01
#define ADDR_VERSION            0x02

// addresses and codes common to all hash cores
#define ADDR_CTRL               0x8
#define CTRL_INIT_CMD           1
#define CTRL_NEXT_CMD           2
#define ADDR_STATUS             0x9
#define STATUS_READY_BIT        1
#define STATUS_VALID_BIT        2
#define ADDR_BLOCK              0x10
#define ADDR_DIGEST             0x20      // except SHA512


The 32+32 bit name and 32 bit version fields are in basically all cores
at these addresses. The control and status fields are almost at the 0x08
and 0x09 addresses in all cores (but not all). What happens after STATUS
is probably core specific fields. But be able to find name, version,
control and status in all cores at the same place seems to me a fairly
easy and worthwile thing to do.

- -- 
Med vänlig hälsning, Yours

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