Date: Tue, 27 Aug 2002 05:39:14 -0300 From: Craig Hawco <dest@syd.eastlink.ca> To: freebsd-hackers@freebsd.org Subject: SMP on Intel SE7500CW2 Message-ID: <5.1.0.14.0.20020827052903.00bbe268@pop.syd.eastlink.ca>
next in thread | raw e-mail | index | archive | help
Hello,
I've been looking into PR i386/40564 as I'm the owner of an Intel
SE7500CW2. I managed to track it down to start_ap in mp_machdep.c.
snippet from start_ap():
while (read_apic_timer())
if (mp_ncpus > cpus)
return 1; /* return SUCCESS */
After a bit of poking around I found mpboot.s as the location of where
mp_ncpus gets increased (mp_begin) after the AP has been started. The
startup code for the AP is also in mpboot.s. Not being a kernel hacker I'm
kind of stuck at this point. Windows and Linux work with this board, so
it's probably not a hardware problem. Start_ap also appears to follow the
Intel MP Spec very closely, after a quick glance, so I'm at a loss. Is an
interrupt being lost somewhere? Is the problem occuring before the AP even
executes its startup code and thus never executing mp_begin? I'm not an
assembly programmer, and only have a very loose understanding of assembly,
so actually understanding anything going on in mpboot.s is not very likely.
Any help would be greatly appreciated.
Craig Hawco
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?5.1.0.14.0.20020827052903.00bbe268>