Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Remove inclusion of unneeded bootinfo.h header.

Remove pointless BOOTP conditional.

Implement interrupt to CPU binding. Assign interrupts to CPUs in a
round-robin fashion, starting with the highest priority interrupt
on the highest-numbered CPU and cycling downwards.

Rename disable_intr() to ia64_disable_intr() and rename enable_intr()
to ia64_enable_intr(). This reduces confusion with intr_disable() and
intr_restore().

Have configure_final() call ia64_finalize_intr() instead of enable_intr()
in preparation of adding support for binding interrupts to all CPUs.

Create nexus in configure_first() instead of in configure(). This
makes sure that sysinit tasks that run after configure_first(),
but before configure() have a nexus to hang devices off.

Call cninit_finish() in configure_final().

Split configure() into 3 separate steps like we do on other
architectures. This makes it possible to insert hooks before and
after the device attachment step.

Tested thanks to: marcel

Move a relic to its correct location(s): Put nfs diskless initialization
calls with the code they call. (Yet another example of mindless copy&paste).

Change the following environment variables to kernel options:

bootp -> BOOTP
bootp.nfsroot -> BOOTP_NFSROOT
bootp.nfsv3 -> BOOTP_NFSV3
bootp.compat -> BOOTP_COMPAT
bootp.wired_to -> BOOTP_WIRED_TO

- i.e. back out the previous commit. It's already possible to
pxeboot(8) with a GENERIC kernel.

Pointed out by: dwmalone

Change the following kernel options to environment variables:

BOOTP -> bootp
BOOTP_NFSROOT -> bootp.nfsroot
BOOTP_NFSV3 -> bootp.nfsv3
BOOTP_COMPAT -> bootp.compat
BOOTP_WIRED_TO -> bootp.wired_to

This lets you PXE boot with a GENERIC kernel by putting this sort of thing
in loader.conf:

bootp="YES"
bootp.nfsroot="YES"
bootp.nfsv3="YES"
bootp.wired_to="bge1"

or even setting the variables manually from the OK prompt.

Centralize the devstat handling for all GEOM disk device drivers
in geom_disk.c.

As a side effect this makes a lot of #include <sys/devicestat.h>
lines not needed and some biofinish() calls can be reduced to
biodone() again.

Remove special casing for running in the simulator from the kernel
and instead add platform, firmware and EFI stubs to the loader.
The net effect of this change is that besides a special console and
disk driver, the kernel has no knowledge of the simulator. This has
the following advantages:
o Simulator support is much harder to break,
o It's easier to make use of more feature complete simulators.
This would only need a change in the simulator specific loader,
o Running SMP kernels within the simulator. Note that ski at this
time does not simulate IPIs, so there's no way to start APs.

The platform, firmware and EFI stubs describe the following hardware:
o 4 CPU Itanium,
o 128 MB RAM within the 4GB address space,
o 64 MB RAM above the 4GB address space.

NOTE: The stubs in the skiloader describe a machine that should in
parts be defined by the simulator. Things like processor interrupt
block and AP wakeup vector cannot be choosen at random because they
require interpretation by the simulator. Currently the simulator is
ignorant of this.

This change introduces an unofficial SSC call SSC_SAL_SET_VECTORS
which is ignored by the simulator.

Tested with: ski (version 0.943 for linux)

We need neither <sys/diskslice.h> nor <sys/disklabel.h> here.

Add prototype for bootpc_init when BOOTP is defined.

Back out the previous commit.

In the i386 case, options BOOTP requires options NFS_ROOT as well as
options NFSCLIENT. With *both* the NFS options, a bootpc_init()
prototype is brought in by nfsclient/nfsdiskless.h.

In the ia64 case, it just doesn't work and my change just pushes it
further away from working.

Suggested to be wrong by: bde

Pre-declare bootpc_init() so that options BOOTP doesn't break the
build in ia64 and i386 due to -Werror.

Centralize the "bootdev" and "dumpdev" variables. They are still pretty
bogus all things considered, but at least now they don't camouflage as
being MD variables.

Remove __P.

Reviewd by: peter

Fix some unused variables.

Remove call to cninit_finish. This is part of the multiple
low-level console support.

Add BOOTP support.

Cleanup and split of nfs client and server code.
This builds on the top of several repo-copies.

Remove unneeded includes of sys/ipl.h and machine/ipl.h.

Clean up some leftovers from the root mount cleanup that was done some
time ago. FFS_ROOT and CD9660_ROOT are obsolete.

Send "#if NISA > 0" to the bit-bucket and replace it with an option.
These were compile-time "is the isa code present?" tests and not
'how many isa busses' tests.

Implement a rudimentary interrupt handling system which should be good
enough for clock interrupts in SKI.

This is the first snapshot of the FreeBSD/ia64 kernel. This kernel will
not work on any real hardware (or fully work on any simulator). Much more
needs to happen before this is actually functional but its nice to see
the FreeBSD copyright message appear in the ia64 simulator.