RE: HT initialization

[YhLu]

I can not release the code now and it could take some time to get it
reviewed.

YH
> -----Original Message-----
> From: Stefan Reinauer [mailto:[e-mail]] 
> Sent: Monday, January 24, 2005 9:57 AM
> To: [e-mail]
> Cc: [e-mail]
> Subject: Re: HT initialization
> [e-mail]
>
> [050124 17:38]:
> > I'm trying to port LinuxBIOS to a Opteron board with a CK804.
>
> IIRC Yinghai Lu did some CK804 work as well. 
> http://www.clustermatic.org/pipermail/linuxbios/2004-August/00
> 8797.html
> > In auto.c I notice that most boards call ht_setup_chain()
>
> and use the
> > return code to see if a reset is needed.  Since I can't seem to get
> > soft_reset() to work with the CK804, can some on tell me why HT 
> > initialization needs a reset?  Thanks.
>
> The hypertransport links only change their speed after an 
> LDTSTOP_L signal or soft reset. Otherwise the values written 
> to the registers are not in charge.
>
> Since LDTSTOP is more complicated, though it has less impact 
> on the system, LinuxBIOS uses soft reset all over the place.
>
> You need to check where your southbridge is and adapt the 
> soft_reset() function in auto.c (bus,dev,fn number etc)
>
> Stefan
>
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