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From: Marcel Moolenaar <xcllnt@mac.com>
To: Scott Long <scottl@samsco.org>
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Cc: freebsd-current@freebsd.org, Mike Tancsa <mike@sentex.net>
Subject: Re: uart vs sio differences ?
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On Dec 9, 2008, at 9:14 AM, Scott Long wrote:

> That aside, I think what needs to happen is for the driver to use the
> interrupt handler to pull the bytes out of the hardware and into an
> internal lockless ring buffer, then schedule the swi to process the  
> ring
> buffer.

The uart(4) driver is exactly doing what you describe.

-- 
Marcel Moolenaar
xcllnt@mac.com