Add support pci_intr_setattr.
Export non-inline version of pci api for modules (_MODULE is defined).
Fix definition of pc_conf_hook and pc_conf_interrupt.
Switch to using inlines instead of macros.
Switch ibm4xx to use <powerpc/pci_machdep.h>

Clean up gt and peripherals.
This change tested compile only.

branches: 1.12.10; 1.12.30; 1.12.32;
Since files.wscons et al. are included by ~all ports anyway, include
them in the mi "files" file, and remove include statements from md files.
These shouldn't pull in additional kernel code when not in use, so it
shouldn't do any harm except a risk of namespace collisions which
should be easy to fix.

Interrupt handling changes, in discussion since February:

- Reduce available SPL levels for hardware devices to none, vm, sched, high.
- Acquire kernel_lock only for interrupts at IPL_VM.
- Implement threaded soft interrupts.

branches: 1.10.2;
Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

branches: 1.9.4; 1.9.12; 1.9.14; 1.9.16; 1.9.18;
include files.wsfb

branches: 1.8.26; 1.8.30; 1.8.32;
merge ktrace-lwp.

branches: 1.7.12;
remove "pcibus" and "isabus" from "mainbus" -- neither of them
attaches directly
cleanup a comment

Move include of files.usb to after files.wscons, so that tpcalib is
defined before it's used.

Abstract the interface between pckbc(4), and the pckbd(4) and pms(4)
drivers that attach to it. This allows for other host interface chips
that use the same keyboards and mice, such as the ones in the ARM
IOMD20, ARM7500, and SA-1111. The PC-compatible driver is still
called pckbc(4), and the new abstraction layer is "pckbport", so the
child devices have moved from sys/dev/pckbc to sys/dev/pckbport, which
also contains some code shared between all host controllers. To avoid
incompatibility, pckbdreg.h is still installed in
/usr/include/dev/pckbc.

In theory, this shouldn't cause any behavioural changes in the drivers
concerned. Thy just use rather more function pointers than before. Tested
on i386 and (with a new host driver) acorn32. Compiled on several other
affected architectures.

Switch ibm4xx ports to common powerpc bus_space/bus_dma code.
XXX: Walnut PCI support is broken. This will be addressed shortly.

branches: 1.3.2;
Make PCI interrupts -> GPP mapping configured via config file.
Add bus_spaces for all possile obios. Add gt_halt to make
sure the discovery is not doing dma as soon as possible.
Read the SDRAM register to figure out how much physical RAM
is available.

EV64260 now gets to single user prompt using COM1 (2nd uart) as console
with PPCBOOT as firmware. XXX PCI devices are not found.

Add preliminary support Marvell (Galileo) Discovery System Controllers.
This code was contributed by Allegro Networks.