Date: Wed, 12 Apr 2006 17:00:03 +0200 From: Alexander Leidinger <Alexander@Leidinger.net> To: John Baldwin <jhb@FreeBSD.org> Cc: Maxim Sobolev <sobomax@FreeBSD.org>, src-committers@FreeBSD.org, cvs-all@FreeBSD.org, cvs-src@FreeBSD.org Subject: Re: cvs commit: src/sys/boot/i386/cdboot cdboot.s Message-ID: <20060412170003.wfyjml16h44kcg0w@netchild.homeip.net> In-Reply-To: <200604121032.07279.jhb@freebsd.org> References: <200604110439.k3B4dTOD072774@repoman.freebsd.org> <200604111803.27889.jhb@freebsd.org> <443C76A0.30308@FreeBSD.org> <200604121032.07279.jhb@freebsd.org>
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John Baldwin <jhb@FreeBSD.org> wrote: > On Tuesday 11 April 2006 23:40, Maxim Sobolev wrote: >> BTW, can you please take a look at the problem with SMP bootstrap on >> Aplintel notebooks? For some reason our SMP kernel can't start the >> second processor. You can find more details here: >> >> http://groups.google.ca/group/mailing.freebsd.current/browse_thread/threa= d/2b554e7a6cf3d3cd/b4f74b7c7907cb41?lnk=3Dst&q=3D%22Intel+Macs+that+boot+Fre= eBSD%3F%22&rnum=3D1&hl=3Den#b4f74b7c7907cb41 > > I looked but unfortunately there isn't much to go on. We follow the seque= nce > Intel specifies. If you want to debug this you'll have to probably do > something like bring back the postcode stuff in mp startup and dump the > various postcode values to see how far the AP got, etc. If it helps: I've read somewhere that the dual-core CPUs from Intel =20 changed the semantic of the HT <something> (don't remember if it's the =20 feature bit or the register or whatever... I don't have that much =20 low-level knowledge of current CPUs). They made this so that Windows =20 XP is able to run with the dual-core CPU instead of requiring the =20 Professional version to use both CPU cores. So maybe we need to change the part in FreeBSD which handles the HT =20 part of the CPU... Bye, Alexander. --=20 http://www.Leidinger.net Alexander @ Leidinger.net: PGP ID =3D B0063FE7 http://www.FreeBSD.org netchild @ FreeBSD.org : PGP ID =3D 72077137 Cancerman: What is this? Skinner: This is where you pucker up and kiss my ass. =09"The X-Files: Paper Clip"
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