Andy [[email protected]] wrote:
> Hi back in the office now.
>
> On Thu 07 Nov 2013 20:54:20 GMT, Chris Cappuccio wrote:
> >Andy Lemin [[email protected]] wrote:
> >>Hi, sadly OpenBSD does not boot with the latest Ivy Bridge EP (E5-2637v2)
> >>with 'Power Technology' in the supermicro BIOS set to 'Max Performance', on
> >>both 5.4 release and the snapshot dated Nov 3rd;
> >>
> >
> >This is a bug that needs to be fixed.
> >
>
> So enabling the 'Power Technology' results in trace;
> kernel: integer divide fault trap, code=0
> Stopped at est_init+0xc3: idivl %ebx,%ea%
> est_init() at est_init+0xc3
> mainbus_attach() at mainbus_attach+0xd5
> config_attach() at config_attach+0x1d4
> cpu_configure() at cpu_configure+0x17
> main() at main+0x3f5
> end trace frame: 0x0, count: 6
> ddb{0}>
>
est_init() in /usr/src/sys/arch/amd64/amd64/est.c has this bit:
low = est_fqlist->table[est_fqlist->n - 1].mhz;
high = est_fqlist->table[0].mhz;
and the only division happening is:
perflevel = (cpuspeed - low) * 100 / (high - low);
So an integer divide trap means a divide-by-zero? That means high and low
are the same?
A stupid fix might be:
if (high - low == 0)
perflevel = 99
else
perflevel = (cpuspeed - low) * 100 / (high - low);
>
> I understand that these are not errors but are warnings for found devices
> which OpenBSD has no drivers for etc.. However their are a /lot/ of missing
> devices which is worrying and makes me wonder what on the motherboard is not
> working... The chipset is Intel and these are all missing Intel drivers.
>
> Their are 37 missing drivers with most being class subtypes 'miscellaneous'
> and several 'DASP subclass Time and Frequency' types.
>
I don't think FreeBSD or Linux match these devices yet either. It is
interesting but not critical.
