Date: Tue, 19 May 2009 15:10:22 -0400 From: John Baldwin <jhb@FreeBSD.org> To: arch@FreeBSD.org Cc: new-bus@FreeBSD.org Subject: [PATCH] Adding support for multiple boot-time passes of the device tree Message-ID: <200905191510.23039.jhb@FreeBSD.org>
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If you were at BSDCan a few weeks ago you may have seen my proposal for extending new-bus to support multiple scans of the device tree during boot-time probing. This patch is the infrastructure work to allow multiple passes. It does not move any drivers (except root0 which is already special) into an early pass, so all devices will still probe as a single pass for now. However, getting this in now before 8.0 will enable folks to start working on other problems such as resource discovery and management and will get the ABI set before the 8.0 feature freeze. The paper where I go into greater detail about the rationale and implementation is available at http://www.FreeBSD.org/~jhb/papers/bsdcan/2009/. The actual patch is available for review at http://www.FreeBSD.org/~jhb/patches/multipass.patch -- John Baldwin
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