[coreboot] Issues with Supermicro H8SCM

[She, Kerry]

Hello, Thomas

> -----Original Message-----
> From: Thomas Gstädtner [mailto:thomas at gstaedtner.net]
> Sent: Sunday, October 09, 2011 11:53 PM
> To: She, Kerry
> Cc: Marc Jones; coreboot
> Subject: Re: [coreboot] Issues with Supermicro H8SCM
> 
> On Sun, Oct 9, 2011 at 07:17, She, Kerry <Kerry.She at amd.com> wrote:
> > Hello, Thomas
> >
> >> -----Original Message-----
> >> From: coreboot-bounces+kerry.she=amd.com at coreboot.org
> >> [mailto:coreboot-
> >> bounces+kerry.she=amd.com at coreboot.org] On Behalf Of Marc Jones
> >> Sent: Saturday, October 08, 2011 3:45 AM
> >> To: Thomas Gstädtner
> >> Cc: coreboot
> >> Subject: Re: [coreboot] Issues with Supermicro H8SCM
> >>
> >> On Fri, Oct 7, 2011 at 1:10 PM, Thomas Gstädtner
> >> <thomas at gstaedtner.net>
> >> wrote:
> >> >
> >> > Thanks for the advice Marc,
> >> >
> >> > I already had the loglevel set to spew (8). I additionally tried
> >> > the other "Verbose output" debugging options, unfortunately I don't
> >> > get any output at all when they are built in.
> >> > Also, while it is hard to find and AMD doesn't have any official
> >> > document confirming this, according to some google hits the
> >> > processor should be revision D1 not rev E (AMD model number:
> OS4170OFU6DGOWOF ).
> >
> > I also found the latest code not boot on my H8SCM-F mainboard with Rev
> D1 processor.
> > So I have made some update to using the AGESA wrapper framework, the
> > attachment is some of my update, with this series of patches applied,
> > we can boot to Debian Linux Destop or Windows Server 2008 R2 standard
> > edition.
> > Thanks
> >
> 
> Hi Kerry,
> 
> first of all: thanks for your effort!
> While I had no success at first, I now can get to the boot prompt
> (haven't tried any further yet).
> 
> Anyway, I currently have 2 DIMMs, each 4 GiB.
> A dual-channel configuration does not seem to work, the DIMMs are
> detected, but coreboot throws an "ASSERTION FAILED" error (see attached
> log cb_h8scm_01.log).
> It seems to fail because it somehow seems to think no DIMM is found
> (despite both DIMMs being detected). I tried disabling this check, but
> this only leads to a reset.
> The same problem exists with a single-DIMM configuration.
> 
> However, when I switch to a dual-DIMM, single-channel config, it at first
> does not start at all (i.e. no output on serial and no heartbeat from the
> BMC) - but when I trigger a manual reset it immediately starts up (see
> attached log cb_h8scm_dimma1a2_success.log).
> 
> I'll report back when I find out more.


I have only test with 4 Registered ECC DIMMs, so I can confirm dual DIMMs in one channel should works,
It seems that the DRAM training has some problem for single DIMM on one channel situation.
Thanks
Kerry