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OpenBSD Multimedia Resources List

Links on this page refer to multimedia resources (podcast, vodcast, audio recordings, video recordings, photos) related to OpenBSD or of interest for OpenBSD users.


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Tag: device tree

  • John Baldwin - Multiple Passes of the FreeBSD Device Tree
    Source: BSDCan - The Technical BSD Conference
    Added: 25 May 2009
    Tags: bsdcan, bsdcan2009, presentation, freebsd, device tree, john baldwin
    Slides (60 Kb, 15 pages), Paper (103 Kb, 8 pages)

    Multiple Passes of the FreeBSD Device Tree

    The existing device driver framework in FreeBSD works fairly well for many tasks. However, there are a few problems that are not easily solved with the current design. These problems include having "real" device drivers for low-level hardware such as clocks and interrupt controllers, proper resource discovery and management, and allowing most drivers to always probe and attach in an environment where interrupts are enabled. I propose extending the device driver framework to support multiple passes over the device tree during boot. This would allow certain classes of drivers to be attached earlier and perform boot-time setup before other drivers are probed and attached. This in turn can be used to develop solutions to the earlier list of problems.

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