From owner-freebsd-current  Mon Oct 29  6:12: 2 2001
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From: "cameron grant" <gandalf@vilnya.demon.co.uk>
To: "John Baldwin" <jhb@FreeBSD.org>
Cc: <freebsd-current@FreeBSD.ORG>, <freebsd-stable@FreeBSD.ORG>,
	<jerry@thehutt.org>, <peter@wemm.org>, <clefevre@citeweb.net>,
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Subject: Re: adding athlon xp to bsd.cpu.mk
Date: Mon, 29 Oct 2001 14:09:54 -0000
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> > 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



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