Date: Mon, 7 Feb 2005 10:15:39 -0500 From: John Baldwin <jhb@FreeBSD.org> To: Ian Dowse <iedowse@FreeBSD.org> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/dev/random probe.c Message-ID: <200502071015.39224.jhb@FreeBSD.org> In-Reply-To: <200502061655.j16GtqDK033151@repoman.freebsd.org> References: <200502061655.j16GtqDK033151@repoman.freebsd.org>
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On Sunday 06 February 2005 11:55 am, Ian Dowse wrote: > iedowse 2005-02-06 16:55:52 UTC > > FreeBSD src repository > > Modified files: > sys/dev/random probe.c > Log: > Check that we have at least a 586-class CPU before calling do_cpuid(). > This fixes booting on a number of 486 processors. This is wrong. Some 486's do have cpuid, notable the dx4's (I used to have one.) The correct test is to see if you can flip a bit in %eflags (can't remember which one). If that flag stays at zero then you don't have cpuid, if the bit follows the value written to it then you do have cpuid. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org
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