Subject: Re: uiomove and bus-ified drivers
To: None <mikel@shore.net>
From: maximum entropy <entropy@zippy.bernstein.com>
List: tech-kern
Date: 12/18/1997 09:21:24
>From: Mike Long <mikel@shore.net>
>
>The extra copy may be inefficient but it may be required if the space
>from which bus_space_read_multi_1() is copying is sparsely addressed,
>e.g. one byte of valid data per 32-bit word.
That isn't the case with this card. It only has 24 valid bits per
word, but the missing high-order byte can be ignored. Anything
written to it is ignored, and it reads back as garbage, but for the
purposes of the driver that's quite all right.
Cheers,
entropy
--
entropy -- it's not just a good idea, it's the second law.