tree e29504d44c7018cbe268dd9a31759477e8d920c6
parent 3b6142d8ff795378d7d1685e74818e020f231cf4
author Eunchan Kim <eunchan@opentitan.org> 1581533436 -0800
committer Eunchan Kim <eunchan@opentitan.org> 1581656933 -0800
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[hmac] Justify the wide address range of MSG_FIFO

Added a section describing the rationale of why MSG_FIFO has wide
address range not a single 4B port.

The idea is to allow STM opcode which only can write with incremental
address, and to allow DMA engine freely use of incremental address.

Signed-off-by: Eunchan Kim <eunchan@opentitan.org>