From owner-freebsd-stable  Mon Oct 29  9:27:34 2001
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Date: Mon, 29 Oct 2001 09:26:59 -0800 (PST)
From: John Baldwin <jhb@FreeBSD.org>
To: cameron grant <gandalf@vilnya.demon.co.uk>
Subject: Re: adding athlon xp to bsd.cpu.mk
Cc: sobomax@FreeBSD.org, clefevre@citeweb.net, peter@wemm.org,
	jerry@thehutt.org, freebsd-stable@FreeBSD.ORG,
	freebsd-current@FreeBSD.ORG
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On 29-Oct-01 cameron grant wrote:
>> > from what i can see, identcpu.c fetches the cpu name using a cpuid
>> > instruction.
>>
>> The part cpuid gives you is "AuthenticAMD".
>> The fancy name is determined by switching on the Id.
> 
> 
> read identcpu.c.  you are correct for k6 and lesser processors.  the code in
> question is around line 323:
>   do_cpuid(0x80000000, regs);
>   nreg = regs[0];
>   if (nreg >= 0x80000004) {
>    do_cpuid(0x80000002, regs);
>    memcpy(cpu_model, regs, sizeof regs);
>    do_cpuid(0x80000003, regs);
>    memcpy(cpu_model+16, regs, sizeof regs);
>    do_cpuid(0x80000004, regs);
>    memcpy(cpu_model+32, regs, sizeof regs);
>   }
> 
>     -cg

Doh, my bad. :)

/me shuffles off into the corner.. 

-- 

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

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