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: 1.62.40;
Add required attribute mk48txx to nvram.

branches: 1.61.2; 1.61.12;
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>

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: 1.58.2;
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: 1.57.4; 1.57.12; 1.57.14; 1.57.16; 1.57.18;
include files.wsfb

branches: 1.56.10; 1.56.14; 1.56.16;
1) Modify pnpbus attachment code to properly decode pnp memory range packets.
2) Modify pnpbus attachment code to record the chipid of the device if it
has one.
3) Change the clock probes to use the chipid, rather than relying on
potentially untrustworthy subtype and interface.
4) Add decoding of memory ranges to the RESIDUAL_DUMP code.
5) Add a we@pnpbus device to allow netbooting and root device detection
from an IBM we ethernet. (it will only work if your firmware detects it)
6) Because I moved the pnpbus probe to occur prior to pci and isa, it
screwed up the root device detection and firmware path building code.
Completely rewrite the fw-path detection code to deal with this.

A bit of clock rototill. It's safer to detect things known by the
residual with the pnpbus probes, than it is to do it with raw isa probes,
so I've replaced the isa mkclock and mcclock code with a pnpbus attachment.

While writing the mkclock code, I realized that on motorola prep machines
the mkclock uses the same port range as the nvram part. (it's actually
the same chip/part). This was causing the nvram not to work on those
machines. Now the nvram code will recognize this, and wire up the
mkclock as well. The mkclock probe is just a stub probe used to
pre-detect the fact that this is one of those machines.

branches: 1.54.2; 1.54.4;
Switch prep to use the MI mbr/disklabel code.

Generic soft interrupt support for prep. Mostly copied from macppc,
tested on 7248 and 7043.

branches: 1.52.2;
More changes to prep port:
1) Add the NVRAM device. This device allows us to speak with the nvram on
prep-based machines and read/write to it. Also add a simple IOCTL
interface for speaking with the nvram from userland. This hasn't been
tested yet, but eventually I plan to support it with the sparc eeprom
command.
2) Change the root device detection to use the nvram device to attempt to
guess the boot device. Most machines should now correctly guess thier
boot device, though I expect a few devices to still not work quite right yet.
3) change the default IRQ to level rather than edge in the pnpbus if the
flags are invalid or empty. (based on output from a PowerStack E1)
4) correctly handle older machines in pnpbus that have FixedIOPorts
rather than variable ones.

Still have much to do.

Prep super-commit:

1) create new pnpbus psuedo bus. This is a bus layer that reads the PNP
tree from the residual data and allows attachment of devices with the
information given therein. Based loosely on i386/pnpbios.

2) Delete obio bus, as with the pnp bus we no longer need it.

3) Create a number of functions that gather the information needed to set
up the machine from the residual data, rather than hardcoding it in.

4) Create a quirk table for machines that are bizzare enough that the
residual information is not sufficient. (such as the 6015)

5) Using the data gathering routines and the quirk table, delete struct
platform completely from the architecture. Prep is now almost completely
dynamic in figuring out the machine it is running on and setting things
up properly.

6) Add a wdc_pnpbus driver which attaches the wdc controller found on
some 7248's and the 6015. This replaces the now-defunct wdc_obio.

7) delete all the mot_* and ibm_* files, and replace them with a single
ibm_machdep.c which only contains the quirk functions for the 6015 and
the 6050.

8) Modify GENERIC to work with all this stuff.

branches: 1.50.2; 1.50.4;
Commit support for the IBM Model 7024 E20 and E30. (E30 not tested).

Changes:
Added a pci-EISA bridge device and associated glue to the prep port.
Adapted from i386.
Change pci_intr_fixup_*() to pass the pin argument on all platforms.
Make PCI_NETBSD_CONFIGURE leave the MPIC alone. We map it separately.

7024 kernel was also succ. tested on an IBM 7043, so no regression there.

branches: 1.49.2; 1.49.4; 1.49.6;
merge ktrace-lwp.

branches: 1.48.12;
don't need md timing functions for joystick anymore

Add platform support for the IBM RS/6000 6015 a/k/a 7020-001 a/k/a 40P.

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.

Remove definitions of "pc" and "pcconskbd" devices which couldn't work since
they used arch/prep/isa/pccons.c, which was removed in late 2001.

- Adapt mkclock_isa.c to MI mk48txx(4) changes.
- Switch mcclock_isa.c to use MI mc146818 driver.
- Use todr(9) interface with both todclock drivers.

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: 1.42.2;
Switch/adapt to new bus space infrastructure.

Remove port-specific procfs_machdep.c (since they are all identical and
a better one resides in powerpc/powerpc/).

Add platform support for the IBM PPS Model 6040 (E) (aka ThinkPad 820).

Moved binary compatibility options from arch directory to cpu directory

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 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.

Support IBM RS/6000 43P 7043-140.

Fix typo in attribute name.

branches: 1.34.2;
Added IBM Personal Power Series 830 IDE controller support.

Use PLATFORM_*

Added dump residual data routine.

Added dump residual data routine.

Separate consinit.

Rename the audio "bus" attribute audiobus to avoid confusion with audio
device.

* 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.

Add platform support for the Motorola Ultra Plus and Ultra 60x boards.

Note that this currently matches only the boards built into Bull Estrella
systems, as Bull chose to change the board identification string whose
original content is not known at this time.

Add an attachment for the MK48T18 RTC/NVRAM found on some Motorola boards.

In order to support both indirect PCI configuration space access as well
as direct-mapped PCI configuration space access (such as implemented on
the IBM 27-82650 PCI Host Bridge), switch to a function vector based
PCI configuration space access implementation. The appropriate PCI
chipset tag is provided by platform-specific code.

Reduce the massive code duplication regarding joy(4). Split it into
MI and MD parts, and make ISA/ISAPNP/PCI joy(4) attachments MI.

- convert usage of "defopt" to "defflag" where the relevant option does
not support a value (e.g., it's to be used as "options FOO" instead of
"options FOO=xxx"). options that take a value were converted to
defparam recently.
- minor whitespace & formatting cleanups

- 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\""

branches: 1.20.2; 1.20.8;
Seprate model depended code. (based on arc 'struct platform')

files.prep:
- add new files entry.

pci_machdep.c:
- use dev/pci/pciconf.c instead of mine for pci io/mem addr/intr fixup.

cpu.c:
- separate code

machdep.c:
- call ident_platform()

mainbus.c:
- call pci_configure_bus(), if defined PCI_NETBSD_CONFIGURE

ibm_machdep.c:
- for IBM PReP generic

ibm_6050.c:
- for IBM Personal Power Series 830/850

ibm_7248.c:
- for IBM RS6000/43P deppendency

Add bus_dma entry.

Add an e_trapsignal member to struct emul, so that emulated processes can
send the appropriate signal depending on the trap type.

Use new common bus.h framework.

branches: 1.16.2;
fix dup include ossaudio.

Added previously created files for powerpc Linux compatibility to the kernel
config system

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.

Add isapnp attachment for prep.

Add ThinkPad 820 audio driver (attaches but does not yet work).

Add support for the IBM ThinkPad 820 G10 display (which is a WD90C24A behind
a funky PCI-VLBUS bridge).

Add generic ISA floppy support

Use MI md_root.c

Make assym.h be generated again
Add pcmcia support to files.prep
Add isa_intr_alloc support.

branches: 1.7.2;
Pull in dev/i2o/files.i2o.

USB support

Fix maxpartitions, pointed out by NAKAJIMA Yoshihiro <nakayosh@kcn.ne.jp>

branches: 1.4.2;
rewrite some bus_space functions like port-i386.

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 :) )

Initial import prep port.