From: Dan Malek <dan@netx4.com>
To: linuxppc-dev <linuxppc-dev@lists.linuxppc.org>
Subject: Altivec on 2.4.xx?
Date: Thu, 27 Jul 2000 21:15:27 -0400 [thread overview]
Message-ID: <3980DEAF.ACFB0C43@embeddededge.com> (raw)
Anyone out there using Altivec with a 2.4.0 kernel? Maybe this
is the wrong list to ask....suggestions welcome.
There is a bug in the Instruction fault handler that interprets the
Altivec enabled flag in the MSR as a write attempt to a protected
instruction page. It is because we commonly use the DSISR and SRR1,
and call it 'error_code' in do_page_fault. The 0x02000000 is the
Altivec enabled flag in SRR1.
This should also break 2.2.xx (unless Altivec enabled is managed
differently and I don't know that).
Right now, I am just removing this as part of the exception handler,
so this function never finds this bit set for instruction faults.
Anyone else?
-- Dan
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next reply other threads:[~2000-07-28 1:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-07-28 1:15 Dan Malek [this message]
2000-07-28 7:24 ` Altivec on 2.4.xx? Daniel Marmier
2000-07-28 14:48 ` Dan Malek
2000-07-28 16:57 ` Daniel Marmier
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