Date: Wed, 29 Nov 2006 13:30:55 -0500 From: John Baldwin <jhb@freebsd.org> To: Michiel Boland <michiel@boland.org> Cc: freebsd-amd64@freebsd.org Subject: Re: BTX halted trying to boot X4100 from disk Message-ID: <200611291330.55892.jhb@freebsd.org> In-Reply-To: <Pine.GSO.4.64.0611260002500.13197@brakkenstein.nijmegen.internl.net> References: <Pine.GSO.4.64.0611091928420.3164@brakkenstein.nijmegen.internl.net> <200611131550.50648.jhb@freebsd.org> <Pine.GSO.4.64.0611260002500.13197@brakkenstein.nijmegen.internl.net>
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On Saturday 25 November 2006 18:10, Michiel Boland wrote: > > On Mon, 13 Nov 2006, John Baldwin wrote: > > > On Monday 13 November 2006 15:12, Michiel Boland wrote: > >>> Yeah, the X4100 has an mpt(4) controller. Mine is running the original > > BIOS > >>> release (6464), and runs FreeBSD fine. You can try fiddling with the BIOS > >>> revision by downloading replacements from Sun's website. > >> > >> As far as I can see there are no other BIOSes on the Sun website other > >> than what the box is already running (ILOM 1.0.7 - I understand ILOM and > >> BIOS are linked for 4100s) > >> > >> I am a bit puzzled why solaris and fedora do not have these problems on > >> this hardware. Oh well... > > > > The real mode breakpoint handler may just ignore breakpoints, or the BIOS > > takes a different codepath when it runs in vm86 mode. > > The code path is the same. The bios calls INT3 if someone tries to load a > block with LBA < 16, or LBA 64 or 65. (I think - my asm skills are a bit > rusty.) > > Is there not a way for BTX to ignore these INT3 interrupts? Obviously they > are ignored in real mode too. Is it ignored in real mode? I had figured the real mode handler would have rebooted the box. If it triggers in real mode then I guess we can just ignore them, at least coming from vm86 mode. I think there is magic to dump the registers but keep going when a breakpoint is triggered in protected mode. -- John Baldwin
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