64-bit support on VIA C7 - on FreeBSD 8.0

[Gót András]

Hi,

Where do you exactly see that this cpu supports amd64? Why do you need it
on an embedded platform?

Regards,
Andras


On Csü, December 3, 2009 7:35 pm, Wiktor Niesiobedzki wrote:
> Hi,
>
>
> I'm owner of a new VIA SN10000 mini-ITX mainboard which comes together
> with VIA C7 processor. During boot it is detected as: CPU: VIA Esther
> processor 1000MHz (997.51-MHz 686-class CPU) Origin = "CentaurHauls"  Id =
> 0x6a9  Stepping = 9
> Features=0xa7c9baff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,APIC,SEP,MTRR,PGE,CMOV,
> PAT,CLFLUSH,ACPI,MMX,FXSR,SSE,SSE2,TM,PBE>
> Features2=0x181<SSE3,EST,TM2>
> VIA Padlock Features=0x3fcc<RNG,AES,AES-CTR,SHA1,SHA256,RSA>
>
>
> As far as I understand, this processor should support 64-bit mode and
> I should be able to boot amd64 FreeBSD.
>
>
> Playing with memstick image for amd64 I get:
> "CPU doesn't support long mode"
>
>
> As far as I've checked, I'm missing AMDID_LM flag, as the expression
> from bootinfo64.c: /* Check for long mode. */
> do_cpuid(0x80000001, regs); return (regs[3] & AMDID_LM);
>
> Returns 0, as regs[3] is 0.
>
>
> As far as I've checked the mailing lists, there was an issue with
> missing support for CentaurHauls vendor, but this is not the case, as the
> failing check is later in the code.
>
> Do anyone has any experience with this family of processors? Are they
> different brands (supporting 64-bit mode and not)? I tried to look for some
> magic settings in BIOS, but none of it looked, like it could change
> anything here.
>
> Any hints?
>
>
>
> Cheers,
>
>
> Wiktor Niesiobedzki
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