Subject: Re: Need help with timecounters/todr
To: Izumi Tsutsui <tsutsui@ceres.dti.ne.jp>
From: Jason Thorpe <thorpej@shagadelic.org>
List: port-alpha
Date: 02/25/2007 19:35:30
On Feb 25, 2007, at 1:24 AM, Izumi Tsutsui wrote:

> root@garbled.net wrote:
>
>> On 24-Feb-2007 Izumi Tsutsui wrote:
>>> Well, I completely agree with you, but I don't think
>>> it's my part to split it into MI/MD part ;-)
>>> (just I'd like to commit todr(9) diffs in my local tree)
>>
>> I would like to note that port-prep would benefit from having an MI  
>> 8254
>> timecounter driver as well.. (I think thats what you're talking  
>> about here,
>> right?)
>
> No, AFAICT alpha uses CPU internal counter (PCC) for microtime(9) like
> x86's TSC, and uses mc146818 compatible for hardclock(9) and todr(9).
> (because TURBOchannel based machines don't have 8254 timer?)

right.

> ---
> Izumi Tsutsui

-- thorpej