Date: Thu, 11 Dec 2003 17:04:31 -0800 (PST) From: Nate Lawson <nate@root.org> To: Bruce M Simpson <bms@spc.org> Cc: "M. Warner Losh" <imp@bsdimp.com> Subject: Re: Common device driver classes? Message-ID: <20031211170335.X51376@root.org> In-Reply-To: <20031212002902.GB83410@saboteur.dek.spc.org> References: <XFMail.20031211164407.jhb@FreeBSD.org> <20031211145311.Q51054@root.org> <20031212002902.GB83410@saboteur.dek.spc.org>
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On Fri, 12 Dec 2003, Bruce M Simpson wrote: > I'm tracking the outcome of this discussion so I know where to put things > like cache geometry discovery. My original plan was to assume uniform > cache and TLB geometry across all CPUs in the system. This may not be > the case. In which case implementing it via ivars may be more appropriate > if Nate chooses to go down this road -- but this leaves the problem of > how to export these properties easily to the userland. > > This is to facilitate getting at these properties a bit easier and > machine-independent (I note that the current NDIS and PowerPC efforts > could probably use this stuff). Those would definitely be properties of the CPU and could be exported via sysctl. My need is a little different in that I need to attach a child driver to a cpu. -Nate
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