From: "Luck, Tony" <firstname.lastname@example.org> To: ia64 Fedora Core Development <email@example.com>, "Zhang, Yanmin" <firstname.lastname@example.org> Cc: email@example.com Subject: RE: [Fedora-ia64-list] Re: The 5th bar of ide controller at legacy mode Date: Mon, 12 Feb 2007 10:18:40 -0800 [thread overview] Message-ID: <617E1C2C70743745A92448908E030B2A011E7BEC@scsmsx411.amr.corp.intel.com> (raw) In-Reply-To: <firstname.lastname@example.org> > Your platform code or BIOS is buggy. PPC people had a similar problem. > Zero is not currently taken as "unallocated" by the PCI layer and, while > Linus suggested it could be, Dave Woodhouse and others pointed out there > are systems which legitimately use address 0 on the PCI in this way. The claim from the BIOS team is that on this system only legacy mode is supported (indicated by the Class Code Programming model being 0x8A) and since drivers/utilities should not make assumptions about these BAR values when the device is in legacy mode, they don't have to initialize them. The BARS would only be guaranteed to be set when programming model 0x8F (native mode) is set. Which sounds sort of plausible ... but perhaps that's because I have not idea what a "Class code programming model" is. Does that make any sense? > Sounds like you need to fix up after your firmware in your boot code, > perhaps with an arch specific pci header quirk. If many other BIOS writers believe the same thing as ours, then maybe it might be worth fixing ... otherwise it looks like we'll need a quirk (this machine is old, there isn't much liklihood of an updated BIOS release for just this issue). -Tony
next prev parent reply other threads:[~2007-02-12 18:18 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2007-02-12 1:40 Zhang, Yanmin 2007-02-12 12:22 ` [Fedora-ia64-list] " Prarit Bhargava 2007-02-12 12:56 ` Alan 2007-02-12 18:18 ` Luck, Tony [this message] 2007-02-12 18:24 ` [Fedora-ia64-list] " Prarit Bhargava 2007-02-12 19:24 ` Alan
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