From: James Bottomley <James.Bottomley@SteelEye.com>
To: Grant Grundler <grundler@parisc-linux.org>
Cc: PARISC list <parisc-linux@lists.parisc-linux.org>
Subject: Re: [parisc-linux] BUG 2.6.12-rc3-pa1 PCI mmap panic
Date: Mon, 02 May 2005 09:51:50 -0500 [thread overview]
Message-ID: <1115045510.5006.7.camel@mulgrave> (raw)
In-Reply-To: <20050502041244.GA1601@colo.lackof.org>
On Sun, 2005-05-01 at 22:12 -0600, Grant Grundler wrote:
> Memory at c0800000 (64-bit, non-prefetchable) [size=1M]
> Memory at c0000000 (64-bit, prefetchable) [size=8M]
Exactly ... that's the 3rd gigabyte; I assume there's no physical memory
there, so the pfnnid_map is 0xff (except the bit where the io region
check works).
However, there's a total screw up here: 0xc0000000 is outside of our
premapped I/O region (0xf0000000-0xffffffff) so one of our assumptions
about pa is broken; either the mercury doesn't obey the I/O window rules
and we need to update the OS, or the card has the wrong address.
> Now the system just resets. No tombstone of any kind. :^(
[...]
> CPU0 IOAQ 0x1010aadc $$remoI+350
> CPU0 GR02 0x1010d110 __udivdi3+198
>
> CPU1 IOAQ 0x101011b0 flush_data_cache_local+8
> CPU1 GR02 0x10113b04 update_mmu_cache+94
>
>
> Looks like CPU1 died right away trying to flush an uncacheable region.
> No surprise that didn't work too well.
>
> And no clue what's up with CPU0.
CPU0 was probably executing a different thread when it was halted by the
HPMC.
flushing an uncacheable area doesn't cause a HPMC, but flushing a non-
existent (and non-responding) area would ...
James
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next prev parent reply other threads:[~2005-05-02 14:51 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-01 7:49 [parisc-linux] BUG 2.6.12-rc3-pa1 PCI mmap panic Grant Grundler
[not found] ` <4274FC81.4060906@tiscali.be>
2005-05-01 17:24 ` Grant Grundler
2005-05-01 19:24 ` James Bottomley
2005-05-02 0:08 ` Grant Grundler
2005-05-02 0:31 ` James Bottomley
2005-05-02 4:12 ` Grant Grundler
2005-05-02 14:51 ` James Bottomley [this message]
2005-05-02 16:00 ` Grant Grundler
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