Date: Wed, 3 May 2006 17:04:45 -0700 From: John-Mark Gurney <gurney_j@resnet.uoregon.edu> To: "M. Warner Losh" <imp@bsdimp.com> Cc: freebsd-current@freebsd.org Subject: Re: lpt0 disappear (ppc related) Message-ID: <20060504000445.GU728@funkthat.com> In-Reply-To: <20060503.155937.118274131.imp@bsdimp.com> References: <20060501.222743.32503989.imp@bsdimp.com> <200605032151.k43Lpjg2009960@ns.init-main.com> <20060503.155937.118274131.imp@bsdimp.com>
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Warner Losh wrote this message on Wed, May 03, 2006 at 15:59 -0600:
> In message: <200605032151.k43Lpjg2009960@ns.init-main.com>
> takawata@jp.freebsd.org writes:
> : In message <20060501.222743.32503989.imp@bsdimp.com>, "M. Warner Losh" ?$B$5$s$$$o
> : ?$B$/:
> : >In message: <200605020815.31012.doconnor@gsoft.com.au>
> : > "Daniel O'Connor" <doconnor@gsoft.com.au> writes:
> : >: On Tuesday 02 May 2006 01:23, M. Warner Losh wrote:
> : >: > : However you wouldn't expect that using it as a module would result in
> : >: > : reduced functionality. (The same as how you wouldn't expect compiling
> : >: > : something into your kernel would result in reduced functionality)
> : >: >
> : >: > At the same time, you'd expect it to behave like every other 'bus' in
> : >: > the tree. We omit the attachments for drivers to that bus when the
> : >: > kernel is built w/o that bus. This is why if you have, say, ep in the
> : >: > kernel, but pccard loaded as a module, the 3c589 you just inserted
> : >: > into the pccard slot won't work.
> : >: >
> : >: > It is a minor imperfection in the config system that no one has taken
> : >: > on as a Problem To Solve. Solving it turns out to be somewhat tricky.
> : >:
> : >: Hmm, but I load acpi as a module and get acpi attachments.. (for sio and ppc
> : >)
> : >:
> : >: <shrugs> it's black magic to me anyway :)
> : >:
> : >: I didn't mean to belittle Marcel's work, I was just suprised that it would
> : >: cause a functionality loss like that.
> : >
> : >I think it just points out a weakness in the underlying system...
> :
> : Is it time to hide isa_dma interface under isa_if ?
> : All acpi capable archictectures links isa_if.c, I think.
>
> Yes. I think it would be worthwhile to have all the ISA symbols
> hidden, like we do for PC Card. This would be a step in that
> direction... Maybe the last step?
Yeh, it'd be good.. I don't plan on adding support for ISA to sun4v
till I don't have to define anoying symbols like isa_init just to get
it running.. :(
--
John-Mark Gurney Voice: +1 415 225 5579
"All that I will do, has been done, All that I have, has not."
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