Date: Wed, 15 Aug 2001 10:14:18 -0700 From: Mike Smith <msmith@freebsd.org> To: janb@cs.utep.edu Cc: Mike Smith <msmith@freebsd.org>, hackers@freebsd.org Subject: Re: more Newbus questions Message-ID: <200108151714.f7FHEIC01010@mass.dis.org> In-Reply-To: Your message of "Wed, 15 Aug 2001 06:02:40 MDT." <Pine.GSO.4.30.0108150527430.19513-100000@gecko>
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This is *totally* not how to do interrupts with Mach. You should be
creating a thread for each interrupt source, and keeping a worklist of
interrupt handlers registered against that source.
Unfortunately, I can't help you with Mach-related things, since I work
for Apple and that'd put me in a conflict-of-interest situation. 8(
> > None of these are newbus items. Interrupt dispatch is not managed by
> > newbus (due to the costs involved). Instead, interrupts are attached
> > with bus_setup_intr, which forwards the interrupt handler and argument
> > to platform-specific code. The resource mananger is involved (since
> > interrupts are a managed resource), and interrupts must be allocated
> > using bus_alloc_resource before being set up.
> >
>
> Could you possibly go over how this works on the i386. Is there a global
> structure that keeps track of all allocated IRQs and interrupt handling
> routines? What I really need, is to find out, where this structure is
> built, so that at this point, I can instead build the structure that xmach
> needs. Or, alternatively, I can wait until that structure is done, and
> then make the xmach structure from that...
>
> Thanks again,
>
> JAn
>
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