Merge isaki-audio2 branch, the overhaul of audio subsystem.
- Interrupt-oriented system rather than thread-oriented.
- Improve stability, quality and performance.
- Split playback and record cleanly. Improve halfduplex support.
- Many bugs are fixed including deadlocks, resource leaks, abuses, etc.
- Simplify audio filter mechanism. The encoding/channels/frequency
conversions are completely handled in the upper layer. So the hard-
ware driver only converts its hardware encoding (if necessary).
- audio_hw_if changes:
- Obsoletes query_encoding and add query_format instead.
- Obsoletes set_params and add set_format instead.
- Remove drain, setfd, mappage.
- The call sequences are changed.
- ioctl AUDIO_GETFD/SETFD, AUDIO_GETCHAN/SETCHAN are obsoleted.
- ioctl AUDIO_{QUERY,GET,SET}FORMAT are introduced.
- cleanup config attributes: au*conv and mulaw.
- All hardware drivers should follow it (I've done as much as possible).

Some file paths are changed:
- dev/audio.c -> dev/audio/audio.c (rewritten)
- dev/audiovar.h -> dev/audio/audiovar.h
- dev/audio_dai.h -> dev/audio/audio_dai.h
- dev/audio_if.h -> dev/audio/audio_if.h
- dev/audiobell.c -> dev/audio/audiobell.c
- dev/audiobellvar.h -> dev/audio/audiobellvar.h
- dev/mulaw.[ch] -> dev/audio/mulaw.[ch] + dev/audio/alaw.c

branches: 1.31.18;
WIP "G1-ATA" IDE HDD support. Not enabled by default.

Demonstrated on NetBSD booth at Open Source Conference 2016 Tokyo Fall
and Kansai Open Source 2016:
http://mail-index.netbsd.org/netbsd-advocacy/2016/11/09/msg000721.html
http://mail-index.netbsd.org/netbsd-advocacy/2016/11/16/msg000722.html

See my port-dreamcast@ post for more details:
http://mail-index.netbsd.org/port-dreamcast/2016/12/18/msg000295.html

branches: 1.30.54; 1.30.74; 1.30.78;
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.

branches: 1.29.14;
include files.wsfb

branches: 1.28.8; 1.28.12; 1.28.14;
Switch dreamcast to MI todr(9).

Dreamcast does not use SuperH on-chip RTC, so do it seprately from
other sh3 ports. Convert dreamcast rtc code into a real device
instead of searching/attaching it manually.

Tested by Nick Hudson.

branches: 1.27.4; 1.27.8;
merge ktrace-lwp.

branches: 1.26.12;
MI part of kloader moved to dev/kloader.c from arch/hpc/hpc/
dreamcast and playstation2 port are changed to use this.

Added AICA sound driver contributed by Ryo Shimizu.

branches: 1.24.2;
Add kloader (in-kernel kernel bootloader) support written by
UCHIYAMA Yasushi (uch@netbsd).

XXX Some of these code should be moved into MI place to share
XXX between other ports.

Add support for SEGA LAN Adapter, MB86967 based Ethernet adapter.
Based on the patches in port-dreamcast/17493 by Christian Groessler,
with several modification by me.

maxpartitions 8 -> 16 (the value MAXPARTITIONS in <machine/disklabel.h>)

Add mmem (Maple Bus storage device) and mlcd (Maple Bus monochrome LCD).

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: 1.19.2; 1.19.6;
* Move the mii_bitbang attribute into dev/mii/files.mii
* Pull in dev/mii/files.mii from conf/files, rather than playing
the magic "files include order" dance in N machine-dependent
configuration definitions.

All the sh3 ports had an identical procfs_machdep.c, so use a common
file under arch/sh3/sh3.

add cpu device. sync with shb change.

remove unneeded code and files.

New NetBSD/sh3 clock framework.
+ hardclock source is moved from TMU1 to TMU0.
+ SH3/SH4 common kernel support.
+ PCLOCK estimation.
+ remove duplicated code.

- replace "defopt" with "defparam" for options which must take a value,
as config(8) will warn for value-less defparam options
- minor whitespace/formatting cleanup
- consolidate opt_tcp_recvspace.h and opt_tcp_sendspace.h into opt_tcp_space.h

cleanup:
options SPACE TAB
makeoptions TAB
psuedo-device TAB
remove trailing whitespace
replace multiple spaces -> tabs
options "FOO" -> options FOO
options "FOO=bar" -> options FOO=bar
options "FOO=\"bar\"" -> options FOO="\"bar\""

Driver for the Dreamcast mouse, based on the programming info
on Marcus's web site.

Not yet thoroughly tested, but does appear to generate events
that look okay.

branches: 1.11.2;
Changed maple device to attach per function instead of per unit.
Raw maple unit access is now possible through /dev/maple*.

dreamcast clock module was separated.

branches: 1.9.2;
move disksubr.c define to machine-port.

move machine-port specific file to machine directory.
for evbsh3, mmeye and dreamcast, use MI md_root.c

Config glue for rasops/wsfont.

G2/GAPS PCI configuration glue, for the Broadband Adapter.

Make the "maple" bus a direct config bus. Now, when a device is
not configured into the kernel, you know about it, e.g.:

Dreamcast Controller at maple0 port 0 not configured

Added GDROM device.

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.

WSCONS console added.

branches: 1.1.2;
Initial import of port "dreamcast" (cloned from port "evbsh3").

WIP "G1-ATA" IDE HDD support. Not enabled by default.

Demonstrated on NetBSD booth at Open Source Conference 2016 Tokyo Fall
and Kansai Open Source 2016:
http://mail-index.netbsd.org/netbsd-advocacy/2016/11/09/msg000721.html
http://mail-index.netbsd.org/netbsd-advocacy/2016/11/16/msg000722.html

See my port-dreamcast@ post for more details:
http://mail-index.netbsd.org/port-dreamcast/2016/12/18/msg000295.html

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.

branches: 1.29.14;
include files.wsfb

branches: 1.28.8; 1.28.12; 1.28.14;
Switch dreamcast to MI todr(9).

Dreamcast does not use SuperH on-chip RTC, so do it seprately from
other sh3 ports. Convert dreamcast rtc code into a real device
instead of searching/attaching it manually.

Tested by Nick Hudson.

branches: 1.27.4; 1.27.8;
merge ktrace-lwp.

branches: 1.26.12;
MI part of kloader moved to dev/kloader.c from arch/hpc/hpc/
dreamcast and playstation2 port are changed to use this.

Added AICA sound driver contributed by Ryo Shimizu.

branches: 1.24.2;
Add kloader (in-kernel kernel bootloader) support written by
UCHIYAMA Yasushi (uch@netbsd).

XXX Some of these code should be moved into MI place to share
XXX between other ports.

Add support for SEGA LAN Adapter, MB86967 based Ethernet adapter.
Based on the patches in port-dreamcast/17493 by Christian Groessler,
with several modification by me.

maxpartitions 8 -> 16 (the value MAXPARTITIONS in <machine/disklabel.h>)

Add mmem (Maple Bus storage device) and mlcd (Maple Bus monochrome LCD).

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: 1.19.2; 1.19.6;
* Move the mii_bitbang attribute into dev/mii/files.mii
* Pull in dev/mii/files.mii from conf/files, rather than playing
the magic "files include order" dance in N machine-dependent
configuration definitions.

All the sh3 ports had an identical procfs_machdep.c, so use a common
file under arch/sh3/sh3.

add cpu device. sync with shb change.

remove unneeded code and files.

New NetBSD/sh3 clock framework.
+ hardclock source is moved from TMU1 to TMU0.
+ SH3/SH4 common kernel support.
+ PCLOCK estimation.
+ remove duplicated code.

- replace "defopt" with "defparam" for options which must take a value,
as config(8) will warn for value-less defparam options
- minor whitespace/formatting cleanup
- consolidate opt_tcp_recvspace.h and opt_tcp_sendspace.h into opt_tcp_space.h

cleanup:
options SPACE TAB
makeoptions TAB
psuedo-device TAB
remove trailing whitespace
replace multiple spaces -> tabs
options "FOO" -> options FOO
options "FOO=bar" -> options FOO=bar
options "FOO=\"bar\"" -> options FOO="\"bar\""

Driver for the Dreamcast mouse, based on the programming info
on Marcus's web site.

Not yet thoroughly tested, but does appear to generate events
that look okay.

branches: 1.11.2;
Changed maple device to attach per function instead of per unit.
Raw maple unit access is now possible through /dev/maple*.

dreamcast clock module was separated.

branches: 1.9.2;
move disksubr.c define to machine-port.

move machine-port specific file to machine directory.
for evbsh3, mmeye and dreamcast, use MI md_root.c

Config glue for rasops/wsfont.

G2/GAPS PCI configuration glue, for the Broadband Adapter.

Make the "maple" bus a direct config bus. Now, when a device is
not configured into the kernel, you know about it, e.g.:

Dreamcast Controller at maple0 port 0 not configured

Added GDROM device.

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.

WSCONS console added.

branches: 1.1.2;
Initial import of port "dreamcast" (cloned from port "evbsh3").