For very MD codes for Explora, reorder things, and use more common codes for
ibm4xx and ibm40x for clarity as well as better comparison with other boards.

No functional changes intended.

Switch to genppc_cpu_configure().

branches: 1.13.52;
Do not call setroot() from MD code and from MI code, which has
unwanted sideeffects in the RB_ASKNAME case. This fixes PR/46732.

No longer wrap MD cpu_rootconf(), as hp300 port stores reboot information
as a side effect. Instead call MI rootconf() from MD code which makes
rootconf() now a wrapper to setroot().

Adjust several MD routines to set the global booted_device,booted_partition
variables instead of passing partial information to setroot().

Make cpu_rootconf(9) describe the calling order.

branches: 1.12.2;
Fix hangs-up. Remove "wrteei 1" in board's cpu_configure(). Interrupt
is enabled in powerpc-layer.

branches: 1.11.2; 1.11.6;
split device/softc (CFATTACH_DECL_NEW)
struct device * -> device_t
struct cfdata * -> cfdata_t
Use <sys/foo.h> instead of <machine/foo.h> if <sys/foo.h> exists
Explicitly include <powerpc/ibm4xx/cpu.h> when needed.

branches: 1.10.32;
Remove clause 3 and 4 from TNF licenses

branches: 1.9.16; 1.9.18; 1.9.20;
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: 1.8.6;
Move intr_init() from cpu_configure() to cpu_startup() so softintrs
pool_get() works again.

branches: 1.7.8; 1.7.16; 1.7.20; 1.7.22;
Remove unneeded cast which eliminates part of valid interrupt mask bits.
Closes PR powerpc/33108.

branches: 1.6.20; 1.6.22;
bare asm -> __asm

merge ktrace-lwp.

branches: 1.4.12;
Centralize the declaration of booted_device and booted_partition.

__KERNEL_RCSID()

Add device_register().

branches: 1.1.2;
Add a port to the NCD Explora451 ThinClient.

- Supported devices: le, com, lpt, pckbd, frame buffer.
- Support missing: phy, audio, pcmcia.
- Boots from network or md.

Approved by: Eduardo Horvath <eeh@netbsd.org>