Date: Mon, 29 Oct 2001 09:26:59 -0800 (PST) From: John Baldwin <jhb@FreeBSD.org> To: cameron grant <gandalf@vilnya.demon.co.uk> Cc: sobomax@FreeBSD.org, clefevre@citeweb.net, peter@wemm.org, jerry@thehutt.org, freebsd-stable@FreeBSD.ORG, freebsd-current@FreeBSD.ORG Subject: Re: adding athlon xp to bsd.cpu.mk Message-ID: <XFMail.011029092659.jhb@FreeBSD.org> In-Reply-To: <002101c16083$6ff87260$0504020a@haveblue>
next in thread | previous in thread | raw e-mail | index | archive | help
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/
PGP Key: http://www.baldwin.cx/~john/pgpkey.asc
"Power Users Use the Power to Serve!" - http://www.FreeBSD.org/
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-stable" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?XFMail.011029092659.jhb>