[Cryptech Tech] Grand unifying core api

[Joachim Strömbergson]

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Aloha!

We should also try to harmonize api bits. The common theme seems to be:

  localparam ADDR_CTRL        = 8'h08;
  localparam CTRL_INIT_BIT    = 0;
  localparam CTRL_NEXT_BIT    = 1;

  localparam ADDR_STATUS      = 8'h09;
  localparam STATUS_READY_BIT = 0;
  localparam STATUS_VALID_BIT = 1;

We have been talking about api_error flag and clear bit. The TRNG also
has some control bits for test mode and discard state (i.e. full
restart). The trng should probably also have a reseed control bit.

What is your suggestion here Rob? Use bit 31 as error bit (status and
control) and bits [2..30] open for core specific stuff? Reserve some
bits for common things? The first eight or 16 or so.

Wisdom appreciated.
- -- 
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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