Add the glue for the new pmap module. Disabled by default pending further
testing.

Switch luna68k over to the common interrupt dispatch code.

Switch luna68k over to the common m68k vector table.

Remove duplicated / slightly-tweaked loadustp() (load user segment table)
routines from all of the m68k ports using the shared pmap. Instead, in
pmap_init(), set up a function pointer to the appropriate mmu_load_urp*()
function in mmu_subr.s.

fix KGDB enabled build for luna68k:
* include sys/kgdb.h in luna68k/trap.c for missing definitions.
* cast second kgdb_trap argument to (db_regs_t *).
* build m68k/kgdb_machdep.c in kgdb enable build for kgdb_trap() implementation.

luna68k: add psgpam(4) audio for LUNA, using YM2149 PSG/SSG sound chip.

"PSG PAM" is a audio driver using "Pulse Amplitude Modulation" with the
YM2149 PSG/SSG chip connected to the I/O processor HD647180X on LUNA.
The driver plays up to 30 kHz PCM audio by manipulating PSG channel volumes
at extremely high speed with 6.144 MHz HD647180X, a Z80 compatible sub CPU.
https://www.youtube.com/watch?v=fR7PqaLpijQ
https://www.youtube.com/watch?v=kCDZCgkwgBA

Compatibilities with the existing XPIOCDOWNLD ioctl(2) to download and
exec user programs (PSG sound driver player ported from PC-6001 etc.)
on the HD647180X is still provided.
https://twitter.com/tsutsuii/status/1533247362965315584

This psgpam(4) driver for NetBSD/luna68k was written by @moveccr
during isaki-audio2 branch developments, and it was also demonstrated
at Open Source Conference 2018 Kyoto:
https://github.com/isaki68k/netbsd-src/tree/audio2
https://mail-index.netbsd.org/netbsd-advocacy/2018/08/07/msg000781.html
https://twitter.com/tsutsuii/status/1025504875625365505

Note specifications of interrupts from the HD647180X to the host LUNA
was confirmed by Kenji Aoyama on his LUNA-88K2 running OpenBSD/luna88k.

I would like to thank all people still working on ancient LUNA machines!

fix various typos, mainly in comments.

Refactor the 68040 writeback() from each m68k port's trap handler into a
shared copy: m68040_writeback(). It is essentially a copy of the Atari
version, with some minor cosmetic tweaks and one small performance optimization
from the mvme68k port.

Tested by rjs@ on a Quadra 950. (Thanks!)

branches: 1.27.4;
add a special rule to build m68k/fpu.c to avoid passing -msoft-float.
fixes GCC 6 kernel builds that use this file.

Add a driver for LUNA's front panel LCD. Ported from OpenBSD/luna88k.

Reviewed by enami@. Tested by Naruaki Etomi and me.

A 68k LUNA with this driver will be demonstrated at AsiaBSDCon NetBSD booth
by Etomi-san, with LUNA-88K2 running OpenBSD/luna88k by Kenji Aoyama.

branches: 1.25.2;
Preliminary support for LUNA's HD647180X I/O processor (a.k.a. XP).

Demonstrated as "PSG tunes / PCM wav player on LUNA"
(using Z80 PSG/PCM drivers ported from NEC PC-6001)
at OSC2016 Kyoto and OSC2016 Hiroshima:
http://mail-index.netbsd.org/netbsd-advocacy/2016/08/01/msg000712.html
http://mail-index.netbsd.org/netbsd-advocacy/2016/11/29/msg000724.html

branches: 1.24.2; 1.24.4; 1.24.8; 1.24.10;
Pull LUNA's keyboard driver changes from OpenBSD/luna88k.

- split keyboard mapping definitions to new files, omkbdmap.[ch]
- add WSDISPLAY_COMPAT_RAWKBD support
(actually the name is wrong; it doesn't emit raw keycode but
converts MD code into PS/2 one as "raw keycode on x86" for Xorg server)
- allow to enter into ddb by CTRL+ALT(zenmen)+ESC
- remove unnecessary return values

Now LUNA's keyboard works on Xorg server without tweaks by xmodmap(1) etc.

branches: 1.23.6; 1.23.10; 1.23.24;
Use now common fpu_probe() and print FPU type per probe result since
it turns out that server and high-end LUNA models actually have MC68882,
not MC68881 as basic and standard models:
http://www.h2.dion.ne.jp/~dogs/collect/ds/luna.html

Also put LUNA model names into cpu_model[] for sysctl(3).
(maybe we don't have to consider sysctl backward compatibility on this port ;-)

branches: 1.22.2;
Welcome to 5.99.53! Merge rmind-uvmplock branch:

- Reorganize locking in UVM and provide extra serialisation for pmap(9).
New lock order: [vmpage-owner-lock] -> pmap-lock.

- Simplify locking in some pmap(9) modules by removing P->V locking.

- Use lock object on vmobjlock (and thus vnode_t::v_interlock) to share
the locks amongst UVM objects where necessary (tmpfs, layerfs, unionfs).

- Rewrite and optimise x86 TLB shootdown code, make it simpler and cleaner.
Add TLBSTATS option for x86 to collect statistics about TLB shootdowns.

- Unify /dev/mem et al in MI code and provide required locking (removes
kernel-lock on some ports). Also, avoid cache-aliasing issues.

Thanks to Andrew Doran and Joerg Sonnenberger, as their initial patches
formed the core changes of this branch.

branches: 1.21.2;
- merge and move pasted m68k MD setreg() functions into m68k/m68k_machdep.c
- move m68881_save() and m68881_restore() declarations into <m68k/m68k.h>

Briefly tested and no obvious breakage on atari, sun3, and x68k.

branches: 1.20.32; 1.20.38;
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: 1.18.2; 1.18.18; 1.18.20; 1.18.26;
Add MI softintr(9) support for luna68k with common m68k/softintr.c.
Compile test only.

branches: 1.17.26;
merge ktrace-lwp.

branches: 1.16.12;
use the common procfs_machdep.c

Move spc into the MI area.

Since everyone uses clock_subr.c (or should, if they don't currently),
list it in conf/files instead of in every port's files.*.

branches: 1.13.2;
Defflag PANICBUTTON, now that machdep.c includes opt_panicbutton.h.

merge pmap.c for all 4k-page motorola-MMU (or compatible) m68k platforms.

use a merged sys_machdep.c for all the motorola-MMU m68k platforms.

enhance the common m68k db_memrw.c to handle read-only kernel text
and switch all the motorola-MMU m68k platforms to use it.

now that mem_no is emitted by config(8), there is no reason to keep
copy of more or less identical iskmemdev() for every arch; move the function
to spec_vnop.c, and g/c machine-dependant copies

merge the 12 copies of vm_machdep.c on the m68k platforms.
clean up some other stuff along the way, including:
- use m68k/cacheops.*, remove duplicates from cpu.h.
- centralize a few declarations in (all the copies of) cpu.h.
- define M68K_VAC on platforms which have a VAC.
- switch the sun platforms to the (now common) proc_trampoline().
- do the phys_map thang on the sun platforms too, no reason not to.

Merge the gehenna-devsw branch into the trunk.

This merge changes the device switch tables from static array to
dynamically generated by config(8).

- All device switches is defined as a constant structure in device drivers.

- The new grammer ``device-major'' is introduced to ``files''.

device-major <prefix> char <num> [block <num>] [<rules>]

- All device major numbers must be listed up in port dependent majors.<arch>
by using this grammer.

- Added the new naming convention.
The name of the device switch must be <prefix>_[bc]devsw for auto-generation
of device switch tables.

- The backward compatibility of loading block/character device
switch by LKM framework is broken. This is necessary to convert
from block/character device major to device name in runtime and vice versa.

- The restriction to assign device major by LKM is completely removed.
We don't need to reserve LKM entries for dynamic loading of device switch.

- In compile time, device major numbers list is packed into the kernel and
the LKM framework will refer it to assign device major number dynamically.

branches: 1.6.8;
Switch to MI dev/md_root.c for archs which don't have any special
memory disk hooks (i.e. everything except atari).

convert luna68k to ELF. ok'd by nisimura.

branches: 1.4.4; 1.4.8;
Add machdep file for procfs. Currently only used for linux-style
/proc/cpuinfo (only active when procfs is mounted with -o linux).
For ports other than the i386 this currently produces an empty
string.

branches: 1.3.6;
s/md/raid/ for RAIDframe major name.

Add the RAIDframe device major to the machine-dependent config files
so that the right entries get added to dev_name2blk[]. Needed for / on RAID.
(Missed these yesterday.. Thanks to Izumi Tsutsui for noticing, and for
letting me know :) )

Introduce NetBSD/luna68k port into CVS repository.