svn commit: r277694 - head/sys/amd64/conf

[Konstantin Belousov]

On Sun, Jan 25, 2015 at 03:49:27PM +0100, Dag-Erling Sm??rgrav wrote:
> Sergey Kandaurov <pluknet at freebsd.org> writes:
> > Dag-Erling Sm??rgrav <des at freebsd.org> writes:
> > > Log:
> > >   Remove ISA NICs.  Anyone still using these on amd64 can build their
> > >   own kernel.
> > If so, what about i386? (I'd rather not pc98)
> 
> There's a greater chance of ISA devices still being in use on i386
> hardware than on amd64 hardware.  I've never even heard of amd64
> hardware with ISA slots, but I guess there is a remote chance that
The ISA slots where almost mandatory in the Pentium IV era chipsets,
and latest Pentium IV CPUs were capable to run in long mode.  For Core2
times, all CPUs were amd64, and ISA slots were on almost all m/b of
that time, but not all.

> someone may try to use something like an ep(4) PCCARD on a modern laptop
> (which is a bad example, since ep(4) is loadable, but you get the idea).
> 
> > What about device isa in DEFAULTS?
> 
> It's still required for atkbdc.
Device ISA is required for attachment of many unavoidable platform
devices, like legacy atpic, RTC, old timers, and so on. Currently the
physical lines used are provided by chipset emulation of the serial LPC
bus.  So even if there is no physical ISA or LPC bus, ISA as the logical
construct is there.  Most, if not all, monitoring chips are LPC-connected.

On i386, there are even more rudiments, e.g. FPU is attached as the ISA
device to still detect IRQ13-style of interrupts mis-reporting.