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Re: IRQs mapping in PC platform
- To: <ecos-discuss at sourceware dot cygnus dot com>, "Fabrice Gautier" <Fabrice_Gautier at sdesigns dot com>
- Subject: Re: [ECOS] IRQs mapping in PC platform
- From: "Boris V. Guzhov" <borg at int dot spb dot ru>
- Date: Fri, 25 Aug 2000 11:43:30 +0400
- References: <8AE4B526B977D411841F00A0CC334020052C27@cuz-exchange.sdesigns.net>
> > > For cyg_drv_interrupt_mask() is similarly.
>
> I would like to disagree with this last remark about the mask function.
If
> you meant similarly as: "mask IRQ2 when maksing irq 8 or above" that
would,
> I think, mean that all IRQs above 8 are masked when we mask an IRQ above
8.
>
Yes, that's right.
> More generally I think that IRQ 2 should never be masked unless
> intentionnaly with the cyg_interrupt_mask. If it was the case, then mask
and
> unmask function should have worked correctly.
> And I think too that IRQ2 should be unmasked at PIC initialisation.
>
> Anyway it is still a good idea to unmask IRQ2 when unmasking an IRQ above
8.
>
> Thanks
>
> --
> Fabrice Gautier
> fabrice_gautier@sdesigns.com
>
Thanks
--
Boris Guzhov,
St.Petersburg, Russia