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

[Nate Lawson]

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.

-- 
Nate