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    SubjectRe: [PATCH] ppc64: Add mecanism to check existence of legacy ISA devices
    On Sat, 2004-10-23 at 10:32, Linus Torvalds wrote:
    > On Sat, 23 Oct 2004, Benjamin Herrenschmidt wrote:
    > >
    > > This patch adds an arch function that can be overriden by the various
    > > platforms at runtime, to query if a given legacy IO device actually
    > > exist on the platform (based on the standard base port).
    > Ehh..
    > Why don't you use the "isapnp" or "acpi" interfaces?
    > Yeah yeah, you don't actually have isapnp on your system. But like it or
    > not, when we talk ISA enumeration, there is an existing standard for doing
    > it. And since the drivers involved don't actually do BIOS calls or
    > anything like that, they don't need to know that your "acpi" or "isapnp"
    > enumeration comes from ppc64 firmware..

    Hrm... currently, those drivers just blindly go tap IO ports and ...

    - the isapnp stuff is _huge_, it's quite difficult to figure out what
    to bring in and what not, and how to adapt it, especially since my
    knowledge of the ISA stuff isn't that big

    - It's only about 2 or 3 drivers and none of theem uses isapnp at this
    point anyway

    It's really only about keyboard, floppy, and _maybe_ parport, I'm not
    sure bringing in the whole isapnp stuff is worth it, but I'll have a
    look. I'd appreciate if the workaround I posted could get in for now


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