Date: Mon, 29 Oct 2001 14:09:54 -0000 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>, <sobomax@FreeBSD.org> Subject: Re: adding athlon xp to bsd.cpu.mk Message-ID: <002101c16083$6ff87260$0504020a@haveblue> References: <XFMail.011028093414.jhb@FreeBSD.org>
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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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