k8 cpu rev

Eric W. Biederman ebiederman at lnxi.com
Fri Dec 3 16:06:01 CET 2004


YhLu <YhLu at tyan.com> writes:

> northbridge/amd/amdk8/cpu_rev.c
> 
> static int is_cpu_pre_c0(void)
> {
>         return (cpuid_eax(1) & 0xffef) < 0x0f48;
> }
> 
> Why need to and 0xffef?

Look at the various cpuid values that happen to be c0 stepping
processors.

Eric



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