Date: Fri, 12 May 2006 04:28:59 -0400 From: "Adam Soderlund" <adamsod@nc.rr.com> To: <freebsd-amd64@freebsd.org> Subject: amd64 SMP AP init corrupting the BDA? (newbie) Message-ID: <200605120829.k4C8T1gp025713@ms-smtp-02.southeast.rr.com>
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Hi All,
Hope this is the right place for questions like this. I've got
something bad going on when booting 6.1release or 7-current amd64 SMP, the
bios data area on my machine is getting whacked (killing usb legacy, which
in turn causes a hang when kernel tries to take over the host
controller(s)). I've debugged it a little bit and here is what I see.
when setting up to launch the APs start_all_aps() calls into pmap_kenter()
which is writing a pte to 0x000004e0 (physical).
0x04e0 in the BDA prior to pmap_kenter(va, boot_address)
0x0000002B
0x04e0 in the BDA after pmap_kenter(va, boot_address)
0x03C10900 (boot_address on the way in 0x9C000)
I'm really new to FreeBSD as well as the list, so I thought I'd see if
anyone had any thoughts on this. as I continue to try and figure out the vm
/ paging stuff.
(shouldn't matter. but this is with 2 dual core Rev F opterons)
Thanks,
-Adam
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