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authortls <tls@NetBSD.org>2005-10-15 08:58:15 +0000
committertls <tls@NetBSD.org>2005-10-15 08:58:15 +0000
commiteb5ea4a10b4705bb464eae347698f850d76a28c3 (patch)
tree644af49d3b989bf40ac1e51730e8822ea954d8ef /sys/dev/raidframe
parent15cb9441e1a9b4b9bfeb8d782552ae384113123d (diff)
Add support for the hardware random number generator on the Hifn 7811
and 795x. This was present in the driver before, but disabled due to problems with the actual randomness of generated numbers on the ubiquitious 7900-series parts. The code here is far, far more conservative than anyone else's driver for this RNG is -- but I believe that conservatism is called for, because the 79xx RNG design is missing a number of pieces from Hifn's "reference" 6500 RNG, and thus the numbers it generates must be treated with some care. Support for the 7811 RNG (which is a full-fledged 6500 type generator) is pretty much the same here as in other variants of this driver, except that it uses Hifn's "worst case" estimate of actual entropy per output bit, so it will accumulate bits much more slowly. The 7811 support is untested.
Diffstat (limited to 'sys/dev/raidframe')
0 files changed, 0 insertions, 0 deletions