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Re: git: Revert "IO APIC: Assign pins dedicated to PCI in the early stage."

From: Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxx>
Date: Tue, 10 Nov 2009 08:45:29 -0800 (PST)

:>     of (C) function pointers for various actions.  That would remove a
:>     large chunk of the code duplication.
:Isn't it so that we only have one real fast interrupt in use?
:	Thomas E. Spanjaard

    I think at this point we only use FAST interrupts for the clock
    interrupt and IPIs.  Hmm. Maybe the AT / PS2 keyboard interrupt

    Unfortunately they are important enough that they have to remain
    FAST interrupts so we still need the general support.  In particular,
    the timer interrupt is used to collect statistics and for that it
    needs a trapframe which tells it what it interrupted.  Meaning it
    has to be a FAST interrupt.

    The IPI interrupt has to be FAST as well because the timer tick
    interrupt sends an IPI to the other cpus to simulate their timer
    ticks (well, it used to anyway... might not be the case any more
    with the LAPIC timer being used now).


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