cvs commit: src/sys/dev/random probe.c

[John Baldwin]

On Monday 07 February 2005 01:39 pm, Nate Lawson wrote:
> John Baldwin wrote:
> > On Sunday 06 February 2005 11:55 am, Ian Dowse wrote:
> >>iedowse     2005-02-06 16:55:52 UTC
> >>
> >>  FreeBSD src repository
> >>
> >>  Modified files:
> >>    sys/dev/random       probe.c
> >>  Log:
> >>  Check that we have at least a 586-class CPU before calling do_cpuid().
> >>  This fixes booting on a number of 486 processors.
> >
> > This is wrong.  Some 486's do have cpuid, notable the dx4's (I used to
> > have one.)  The correct test is to see if you can flip a bit in %eflags
> > (can't remember which one).  If that flag stays at zero then you don't
> > have cpuid, if the bit follows the value written to it then you do have
> > cpuid.
>
> That matters little since the cpuid result is then used to check for a
> VIA part introduced in 2003.

Nevermind then. :-P

-- 
John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org