Merge thorpej-cfargs2.

branches: 1.43.8;
Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

branches: 1.42.68;
Cleanu <machine/*> includes

Merge forward from matt-nb5-mips64.
New interrupt code.
mips64 support for DS5000/260.

branches: 1.40.6;
Use CFATTACH_DECL_NEW(). (no softc)

KNF, ANSIfy, and misc cosmetics.

Change about 4500 of the K&R function definitions to ANSI ones.
There are still about 1600 left, but they have ',' or /* ... */
in the actual variable definitions - which my awk script doesn't handle.
There are also many that need () -> (void).
(The script does handle misordered arguments.)

Remove all the __P() from sys (excluding sys/dist)
Diff checked with grep and MK1 eyeball.
i386 and amd64 GENERIC and sys still build.

branches: 1.36.78; 1.36.86; 1.36.92; 1.36.96;
merge ktrace-lwp.

__KERNEL_RCSID()

branches: 1.34.6;
Use CFATTACH_DECL().

Declare all cfattach structures const.

branches: 1.32.8; 1.32.12;
Very large scale change to sweep obstracles to remove 3MAX IOASIC disguise.
- Rework ibus device configuration and interrupt handler assignment.
- Remove TC device exposure in 'mainbus.c'
- Squash 'ibus_{3100,5100}.c' into a file; it can not cope with 3max.
- 'struct confargs' -> 'struct mainbus_attach_args'
Now about to remove tc_slot_info[] and tc_enable_interrupt inherited from
4.4BSD.

branches: 1.31.2; 1.31.8;
- Continue on branch merge, incrementally.
- Catch up filename changes escaped to be fixed.

branches: 1.30.4;
Remove trailing whitespace.

- Remove a verbose local variable.

- Decouple "ibus" from TURBOchannel.
- Nuke mainbus_softc definition (it's empty).

- Nuke old leftover; round three. Remove never-used functions.
XXX Needs to eliminate TURBOchannel exposure here.

branches: 1.26.2;
- Remove lines make not effects from mainbus.c
- Remove direct device driver calls from dec_3100.c. Close PR#5522.

remove unnecessary "extern int ncpus" (was also causing egcs warning)

Attach ibus to mainbus.
Commit updated dec_3100.c with interrupt-enable code for ibus.

* Use new defopt model-specific options and opt files.
Replace all DS5000_* and DS3100 ifdefs with ifdefs on DEC_ options.
* Use MI declarations, not pmax-specific, in model-specific init
that uses baseboard (ioasic) registers.
* Further cleanup of machdep.c. Clock-tick still needs more thought.
* Use 'ibus' names for 3100 baseboard devices in MI code.

Split sys/arch/pmaxpmax/{machdep.c,trap.c} as suggested by Jason Thorpe:
* add "Platform" support inpmax/pmax/sysconf.c and pmax/include/sysconf.h
(based on Alpha cpuconf.[ch], with a namechange to avoid clashes with
support for models of MIPS cpus. They differ more than Alphas).

* For each supported model of DECstation, create a separate file
with the support for that model. Use model codenames, since
support is really baseboard-specific and CPU daugherboards can change.
Move code from machdep.c and pmax_trap.c,
Add sysconf (nee "cpuconf") support.

* Rename model-specific functions to match sysconf names.

* Clean up autoconf.c. Use platform callbacks.

* Retire pmax_trap.c.

Leaves I/O bus configuration and console configuration untouched.

Update for changes to config.

Kill __BROKEN_INDIRECT_CONFIG on pmax.
Based on a patch from Chris G. Demetriou, December 1996.

Remove the machConst.h (wrapper for Sprite-derived source), and all
#includes <machine/machConst.h> uses.
Other header files now include <mips/cpuregs.h> where necessary.

backout previous kprintf change

printf -> kprintf, sprintf -> ksprintf

Update pmax drivers to use "const" on 2nd arg to cfprint_t:
turbocnhannel: include/tc_machdep.h, tc/tc_subr.c, tc/asic.c
kn01 baseboard: pmax/mainbus.c

change cfprint_t type definition to take a const char *, rather than
a char *, because that's what was really intended, and because
if the print function modifies the string, various things could become
unhappy (so the string should _not_ be modified).

Fix to compile if DS3100 is not defined when building without DS3100 support.
Now that autoconf parameter passing is cleaned up, configure the cpu.

Fix for PR #1828 and partial fix for PR #2548:
* Eliminate the #ifdef DS5000 and kernel config option DS5000 altogether.
option DS5000 was a hangover from 4.4bsd/pmax; it's never been clear
if it means "support for DS5000/200" or "support for any TC machine".
This implictly fixes pr 1828.

* Use the "tc.h" and NTC generated by config for a "tc? at mainbus"
where appropriate, intsead of #ifdef DS5000.


* Canonicalize the spelling of kernel options that enable support
for particular models. Use
DS5000_25 for the Personal Decstation aka MAXINE aka KN02-ca
DS5000_100 for the 5000/1xx series aka KMIN aka KN02-ba
DS5000_200 for the 5000/200 aka 3MAX aka KN02
DS500_240 for the 5000/240 aka 3MAXPLUS aka KN03

and change DS_5000_xxx to DS5000_xxx everywhere.

* Wrap the interrupt handlers for each model in the appropriate #ifdef,
instead of wrapping all of them with "#ifdef DS5000".

Fix autoconfig stuff to more closely match the alpha. The DS3100 will now
configure properly. Also fix devices with TurboChannel and mainbus
attachments so they will work if no TurboChannel was configured.
Fix clock.c for a missing variable if not including NTP support.
Also remove some extraneous includes files or use the right ones.

branches: 1.11.4;
Avoid calling autoconfigure() to configure the CPU.
It just causes a kernel panic, and will until the rest of the pmax
autoconfiguration is redone to use a bus-specific probe and attach
argument, or until KN01 devices are no longer attached to the mainbus.

Fixes for -Wall -Wmissing-prototypes:

Add prototypes to (most of) src/sys/arch/pmax/pmax. (The un-protytyped
parts still have pending merges with the Pica port.)
Fix splx() glitches in pmax/clock.c.
Delete old cpu/fpu identification from pmax/autoconf.c, use r4400/r4600/idt
aware code from Pica port, now in mips/mips/mips_machdep.c.
Delete unused multi-CPU autoconfiguration code; NetBSD/pmax does not
support decsystem 5800s anyway.

update for the fact that config_found() and config_rootfound() now
return pointers. (Check vs. NULL, rather than just boolean tests.)

Change kn01 (pmax,3100) interrupt-enable signature to match
the NetBSD-1.1 convention. Change the mainbus `struct confargs'
and the "generic" interrupt-establish method, used by devices that
appear on both a kn01 and TC decstations, to match.

Change the macros in autconf.h accordingly.

New device attachment scheme:

- split softc size and match/attach out from cfdriver into
a new struct cfattach.

- new "attach" directive for files.*. May specify the name of
the cfattach structure, so that devices may be easily attached
to parents with different autoconfiguration semantics.

Fix #includes.

Re-write Decstation turbochannel autoconfiguration code to use the machine-
independent TC support in sys/dev/tc/tc.c and sys/dev/tc/tcvar.h:
* Change the tc autoconfiguration tables to use a struct tc_attach_args
instead of the ad-hoc structure.
* Change all pmax device drivers to use a `struct confargs' that's
assignment-compatible with sys/dev/tc/tcvar.h `struct tcdev_attach_args'.
Devices that can be present on a TC or as ioctl asic/mainbus builtins
use the same `struct confargs'.
* Eliminate the `BUS_CVTADDR()' macros which the pmax port inherited from
an old, now-obsolete sys/arch/alpha snapshot.

* Update the comments and debugging code in interrupt handlers to
be consistent with the machine-independent TC support.

Other commits that overlap the same source files include: re-enabling
clock-tick interrupts earlier, and counting hardclock ticks for vmstat -i.

Add untested, partial support for Decsystem 5100 (mipsfair).

Change the signature of interrupt-handlers to take a void *
(a pointer to the softc) and return an int (indicating spurious
interrupts or other conditions.)

Use "lance" as the name of the PMAX (kn01) Lance device, not "le", since
"lance" is what the Alpha drivers use.

Change DEcstation autoconfiguration to use new-style config.
All devices except SCSI disks and tapes are found using new config only.
SCSI disks and tapes are configured using a table edited from an ioconf.c
produced by config.old.

Boots multi-user on PMAX, 3MAX and 3MAXPLUS. The old-style "slot hand fill"
functions for those machines, and the old TurboChannel configuration
main loop, have been removed.

Since new-style config runs later in boot than the old pmax turbochannel
probing, we no longer know what devices will be configured when consinit()
is called. Use PROM output until autoconfig is finished.