[Xorg-driver-geode] MSR Support for FreeBSD.

[Larry Maloney]

I found the following software in the ports collection for FreeBSD:

http://www.freebsd.org/cgi/url.cgi?ports/sysutils/devcpu/pkg-descr

Will that give us the MSR's we need?

(FreeBSD has AMD64, which I THINK does something similar for Linux 
CONFIG_X86_MSR option)


I guess the GEODE doesn't' use an AMD64 instruction set...?

Anyway, I can put in the devcpu port and try and see.

Larry


Jordan Crouse wrote:
> On 20/12/07 02:42 -0800, Larry Maloney wrote:
>   
>> Sorry, I was wrong.
>>
>> The driver loads, I get an X back ground and the X cursor, but the session 
>> is frozen.  I can't load any graphic applications inside X.
>>     
>
> That is most likely because the GPU is stuck in an infinite loop.
> Easy way to check is to add option "NoAccel" "true" to the card 
> section in your xorg.conf.
>
> If that is the case, then the problem is probably in the MSR code,
> which I feared might give us problems in BSD.
>
> put copious ErrorF messages through the LXReadMSR and LXWriteMSR
> functions - the GeodeReadMSR and LXWRiteMSR functions should return
> error on your machine (since BSD doesn't have /dev/cpu/0/msr),
> but the LX_MSR_READ and LX_MSR_WRITE functions should work.  One thing
> to check is to make sure that the inline assembly is correct and
> that you have I/O permission in BSD (you should, but you never know).
>
> if there is a sane way to read MSRs without the VSA I/O on BSD, then
> lets put that into the GeodeReadMSR and GeodeWriteMSR functions bounded
> the appropriate #ifdefs, which is the more correct solution (as you can
> tell, I know nothing of the internal workings of BSD).
>
> The problem _might_ be somewhere else, but to be honest with you, every
> time this failure case has come up, then this has been the problem.
>
> Jordan
>
>
>
>
>   


-- 
==============================
Larry P. Maloney
CEO/CTO SoftNet Solutions

Phone: 650-669-1942
  Web: www.softnetsolution.com

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