From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: Sebastian Smolorz <ssm@domain.hid>
Cc: adeos-main@gna.org, Richard Cochran <richard.cochran@domain.hid>
Subject: Re: [Adeos-main] Porting to Intel IXP425
Date: Fri, 30 Mar 2007 14:16:54 +0200 [thread overview]
Message-ID: <460CFFB6.7010902@domain.hid> (raw)
In-Reply-To: <E1HXFOe-0003Vm-25@domain.hid>
Sebastian Smolorz wrote:
> Richard Cochran wrote:
>
>>Looking at __ipipe_mach_irq_mux_p and __ipipe_mach_demux_irq:
>>
>>The 'mux_p' seems to identify one of the IRQs, and this IRQ is special
>>in some way. The 'mux' here stands for 'multiplex', I guess. But what
>>exactly is the meaning of this macro?
>
>
> It has to determine whether a given IRQ is cascaded and therefore must be
> specially serviced WRT acknowledging. The required acknowledging of
> IRQ-subchannels is done in __ipipe_mach_demux_irq together with the call of
> __ipipe_handle_irq() after having determined the correct IRQ number where
> necessary.
>
Right. And I think the IXP425 has no cascaded IRQ, so you can define
__ipipe_mach_irq_mux_p to 0, and do not have to implement
__ipipe_mach_demux_irq.
--
Gilles Chanteperdrix
next prev parent reply other threads:[~2007-03-30 12:16 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-30 10:20 [Adeos-main] Porting to Intel IXP425 Richard Cochran
2007-03-30 11:35 ` Sebastian Smolorz
2007-03-30 12:16 ` Gilles Chanteperdrix [this message]
2007-03-30 13:51 ` Richard Cochran
2007-03-30 14:05 ` Gilles Chanteperdrix
2007-03-30 14:33 ` Richard Cochran
2007-03-30 14:41 ` Gilles Chanteperdrix
2007-03-30 21:29 ` [Adeos-main] " Schlägl Manfred jun.
2007-03-31 10:33 ` Gilles Chanteperdrix
2007-03-30 14:55 ` [Adeos-main] " Philippe Gerum
2007-03-30 16:07 ` Richard Cochran
2007-03-30 17:16 ` Gilles Chanteperdrix
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