From: Jonathan Larmour <jlarmour@redhat.com>
To: Robin Farine <acnrf@dial.eunet.ch>
Cc: ecos-discuss@sources.redhat.com
Subject: Re: [ECOS] sa11x0 spurious interrupts
Date: Tue, 13 Feb 2001 09:18:00 -0000 [thread overview]
Message-ID: <3A896C61.FD04D794@redhat.com> (raw)
In-Reply-To: <867l2vuel3.fsf@halftrack.hq.acn-group.ch>
Robin Farine wrote:
>
> Hello,
>
> While looking at the way the sa11x0 hal's routine 'hal_IRQ_handler()' decodes
> interrupt sources, I noticed that when it does not find an interrupt source,
> the routine returns CYGNUM_HAL_INTERRUPT_NONE, which equals to -1 for this
> platform. However, the common ARM code in "vectors.S" assumes that a spurious
> interrupt always have the vector #0. And worse, 'handle_IRQ_or_FIQ' will call
> 'hal_interrupt_handlers[-1]' which contains 0 and thus reboot!
>
> Did I miss something?
I don't think so. 0 can be a valid ISR. What's worse is that the default
ISR in hal/common also returns 0 to indicate a spurious interrupt.
Anyone got any opinions why this isn't simply all wrong?
Jifl
--
Red Hat, Rustat House, Clifton Road, Cambridge, UK. Tel: +44 (1223) 271062
Maybe this world is another planet's Hell -Aldous Huxley || Opinions==mine
next prev parent reply other threads:[~2001-02-13 9:18 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-02-13 1:19 Robin Farine
2001-02-13 9:18 ` Jonathan Larmour [this message]
2001-02-13 9:56 ` Gary Thomas
2001-02-13 10:10 ` Jonathan Larmour
2001-02-13 10:13 ` Gary Thomas
2001-02-13 11:06 ` Robin Farine
2001-02-13 10:09 ` Robin Farine
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