[LinuxBIOS] hotplugging flash piece on A8N-E / ROMSIZE

[Robert Millan]

On Thu, Aug 30, 2007 at 06:57:18PM +0200, Philipp Degler wrote:
> On Monday 27 August 2007 00:31:37 Quux wrote:
> > Peter Stuge schrieb:
> > > It may not be best practice to hotplug, but it is rather safe since
> > > the chip is never accessed once the system is running.
> >
> >  saves plug cycles and time ...
> >
> > >> Even an 8 Mbit piece 49LF080A works with the Asus a8ne, so
> > >> maybe a kernel may be squeezed in there as well.
> > >
> > > Yup, but only with a minimum of drivers.
> >
> > a 2 MByte piece was used to contain LB + Kernel. I guess a 2 MByte flash
> > would work in A8N-E , too.
> >
> >
> > currently I am trying to manage with the variables ROMSIZE , IMAGE SIZE
> > asf. to build a ROM with correct size 512 KB, which seems tricky for
> > some obscure reason.  --Q
> Today I checked out the latest svn revision and tested on our ASUS A8N-E rev 
> 2.0.
> 
> Status of the board is unchanged. It boots with filo 5.0 from IDE. The 
> autmatically build images are not working. Reason is the RAM issue with 
> Athlon64 CPU in 939 socket.
> 
> You need to modify amdk8/raminit.c
> 
> Index: src/northbridge/amd/amdk8/raminit.c
> ===================================================================
> --- src/northbridge/amd/amdk8/raminit.c (Revision 2754)
> +++ src/northbridge/amd/amdk8/raminit.c (Arbeitskopie)
> @@ -1201,7 +1201,7 @@
>         if (unbuffered && registered) {
>                 die("Mixed buffered and registered dimms not supported");
>         }
> -#if 1
> +#if 0
>         // yhlu debug: Athlon64 939 can do dual channel, but it uses 
> unbuffered DIMMs
>         if (unbuffered && is_opteron(ctrl)) {
>                 die("Unbuffered Dimms not supported on Opteron");
> 
> I also need to mention that you have to put the RAM module in a specific bank. 
> I used bank 3 (blue).

Did you try memtest86+ ?  Asides from the die() you commented out, there were
spurious memory access problems.  In my similar board (A8N5X) those problems
disappeared with a patch provided by Rudolf.

See also:

  http://www.mail-archive.com/linuxbios@linuxbios.org/msg10078.html

I don't remember if the patch was made public.  You'd better ask him about
it :-)

-- 
Robert Millan

<GPLv2> I know my rights; I want my phone call!
<DRM> What use is a phone call, if you are unable to speak?
(as seen on /.)