From: Daniel Helgason <danielh@telus.net>
To: Mike Sweeney <msweeney77@gmail.com>
Cc: ecos-discuss@ecos.sourceware.org
Subject: Re: [ECOS] HAL_INTERRUPT_ACKNOWLEDGE question
Date: Thu, 07 Jun 2007 11:55:00 -0000 [thread overview]
Message-ID: <1181191429.13729.65.camel@localhost.localdomain> (raw)
In-Reply-To: <1181189324.13729.57.camel@localhost.localdomain>
On Wed, 2007-06-06 at 21:08 -0700, Daniel Helgason wrote:
> Generally, interrupts from higher priority sources are masked by the
> interrupt controller until HAL_INTERRUPT_ACKNOWLEDGE is called.
Oops, I can't believe I said that! I think it makes more sense that
interrupts from *lower* priority sources are masked until
HAL_INTERRUPT_ACKNOWLEDGE is called.
But really, it is target-specific whether higher, lower, or any are
released when HAL_INTERRUPT_ACKNOWLEDGE is called. Not that it makes any
difference in HALs that don't support nested interrupts but the macro
might have to tickle the interrupt controller and make it happy.
--
+---------------------------------------------
| Daniel Helgason <danielh@telus.net>
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next prev parent reply other threads:[~2007-06-07 4:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-07 9:14 Mike Sweeney
2007-06-07 10:01 ` Daniel Helgason
2007-06-07 11:55 ` Daniel Helgason [this message]
2007-06-07 15:11 ` Nick Garnett
2007-06-07 17:02 ` Mike Sweeney
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