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History log of /src/sys/arch/acorn32/mainbus
RevisionDateAuthorComments
 1.7 20-Dec-2023  thorpej Remove unnecessary <sys/malloc.h>.
 1.6 19-Jul-2011  dyoung Change <machine/bus.h> to <sys/bus.h> throughout.

Split bus.h -> bus_{defs,funcs}.h.

Mark acorn32/bus.h obsolete.
 1.5 12-May-2009  cegger use device_xname(), use aprint_*_dev
 1.4 16-Apr-2008  cegger branches: 1.4.4; 1.4.18;
device_t / softc split. From Hans Rosenfeld.
 1.3 29-Mar-2006  thorpej branches: 1.3.64;
Use device_cfdata().
 1.2 11-Dec-2005  christos branches: 1.2.4; 1.2.6; 1.2.8; 1.2.10; 1.2.12;
merge ktrace-lwp.
 1.1 22-Jan-2004  bjh21 branches: 1.1.4; 1.1.18;
Add support for using ppbus(4) on acorn32. Only tested to the extent that it
attaches correctly.
 1.1.18.1 21-Jun-2006  yamt sync with head.
 1.1.4.4 21-Sep-2004  skrll Fix the sync with head I botched.
 1.1.4.3 18-Sep-2004  skrll Sync with HEAD.
 1.1.4.2 03-Aug-2004  skrll Sync with HEAD
 1.1.4.1 22-Jan-2004  skrll file atppc_pioc.c was added on branch ktrace-lwp on 2004-08-03 10:30:55 +0000
 1.2.12.1 31-Mar-2006  tron Merge 2006-03-31 NetBSD-current into the "peter-altq" branch.
 1.2.10.1 19-Apr-2006  elad sync with head - hopefully this will work
 1.2.8.1 01-Apr-2006  yamt sync with head.
 1.2.6.1 22-Apr-2006  simonb Sync with head.
 1.2.4.1 09-Sep-2006  rpaulo sync with head
 1.3.64.1 02-Jun-2008  mjf Sync with HEAD.
 1.4.18.1 13-May-2009  jym Sync with HEAD.

Commit is split, to avoid a "too many arguments" protocol error.
 1.4.4.1 16-May-2009  yamt sync with head
 1.17 08-Dec-2018  thorpej Clean up initialization of com_regs structure, in preparation for
some additional changers.
 1.16 19-Jul-2011  dyoung branches: 1.16.52; 1.16.54;
Change <machine/bus.h> to <sys/bus.h> throughout.

Split bus.h -> bus_{defs,funcs}.h.

Mark acorn32/bus.h obsolete.
 1.15 03-Jun-2011  matt device_t, cfdata_t, device_private, device_xname cleanup
CFATTACH_DECL_NEW for struct device only devices
bump SYMTAB_SPACE for EB7500ATX
 1.14 28-Apr-2008  martin branches: 1.14.22; 1.14.28; 1.14.32;
Remove clause 3 and 4 from TNF licenses
 1.13 14-Mar-2008  cube branches: 1.13.2; 1.13.4;
Split device_t and softc for all com(4) devices (well, everything that
uses a com_softc backend). Use proper types and ansify where appropriate.
 1.12 29-Feb-2008  dyoung Use pmf_device_register1() instead of shutdownhook_establish() to
register com_cleanup() as the shutdown hook.

Add a generic suspend routine. Suspend and resume com@isa.

Protect against dereferencing a NULL softc in comioctl().

Destroy both a mutex and a callout in com_detach().

Cosmetic: use aprint_*_dev(). Use PMF_FN_ARGS, PMF_FN_PROTO.
 1.11 13-Jul-2006  gdamore branches: 1.11.34; 1.11.36; 1.11.56; 1.11.60;
Add an option COM_REGMAP to allow com(4) to use an array of register indices.
This allows us to convert aucom to just another com attachment, and cleanup
some code in the com_arbus.c.

Additionally, we use a common com_cleanup routine rather than having a
zillion copies of it in the attachment points.

This has been tested on a number architectures, and it has been shown to get
close to comparable performance when COM_REGMAP is defined, and comparable
when it is not defined.

Approved by core@. Fixes PR port-evbmips/32362.
 1.10 11-Dec-2005  christos branches: 1.10.4; 1.10.8; 1.10.16;
merge ktrace-lwp.
 1.9 07-Aug-2003  agc branches: 1.9.16;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.
 1.8 14-Jun-2003  thorpej branches: 1.8.2;
Also pass a type argument to comcnattach() and com_kgdb_attach().
comspeed() (and thus cominit()) may need this information.
 1.7 02-Oct-2002  thorpej Fix script-o's in previous.
 1.6 02-Oct-2002  thorpej Use CFATTACH_DECL().
 1.5 27-Sep-2002  thorpej Declare all cfattach structures const.
 1.4 10-Mar-2002  bjh21 __RCSID -> __KERNEL_RCSID
 1.3 17-Feb-2002  bjh21 cons_decl(com), to get prototypes.
 1.2 27-Nov-2001  thorpej branches: 1.2.2;
Use <machine/intr.h>, not <machine/irqhandler.h>
 1.1 05-Oct-2001  reinoud branches: 1.1.4;
Initial commit of the splitting off of arch/acorn32 from arch/arm32.

The IOMD/VIDC combination is now moved to arch/arm/iomd together. These
files still need a lot of cleaning up :( .... esp. the RC7500 support that
is still dormant in it; this needs either to be removed or split out for
RC7500's ``VIDC'' video/audio variant.

Apart from the RC7500 support wich is still in arch/arm32 the
iomd,vidc,riscpc and podulebus subdirectories of arch/arm32 can be removed.

This split still uses some small parts of arch/arm32 .... those are the MI
parts that haven't been moved yet.

RiscPC/A7000 have been tested and confirmed to build as should NC.
 1.1.4.5 18-Oct-2002  nathanw Catch up to -current.
 1.1.4.4 01-Apr-2002  nathanw Catch up to -current.
(CVS: It's not just a program. It's an adventure!)
 1.1.4.3 28-Feb-2002  nathanw Catch up to -current.
 1.1.4.2 08-Jan-2002  nathanw Catch up to -current.
 1.1.4.1 05-Oct-2001  nathanw file com_pioc.c was added on branch nathanw_sa on 2002-01-08 00:22:45 +0000
 1.2.2.4 10-Oct-2002  jdolecek sync kqueue with -current; this includes merge of gehenna-devsw branch,
merge of i386 MP branch, and part of autoconf rototil work
 1.2.2.3 16-Mar-2002  jdolecek Catch up with -current.
 1.2.2.2 10-Jan-2002  thorpej Sync kqueue branch with -current.
 1.2.2.1 27-Nov-2001  thorpej file com_pioc.c was added on branch kqueue on 2002-01-10 19:36:27 +0000
 1.8.2.3 21-Sep-2004  skrll Fix the sync with head I botched.
 1.8.2.2 18-Sep-2004  skrll Sync with HEAD.
 1.8.2.1 03-Aug-2004  skrll Sync with HEAD
 1.9.16.2 17-Mar-2008  yamt sync with head.
 1.9.16.1 30-Dec-2006  yamt sync with head.
 1.10.16.1 20-Jun-2006  gdamore COM_INIT_REGS-ify acorn32.
 1.10.8.1 11-Aug-2006  yamt sync with head
 1.10.4.1 09-Sep-2006  rpaulo sync with head
 1.11.60.2 02-Jun-2008  mjf Sync with HEAD.
 1.11.60.1 03-Apr-2008  mjf Sync with HEAD.
 1.11.56.1 24-Mar-2008  keiichi sync with head.
 1.11.36.1 23-Mar-2008  matt sync with HEAD
 1.11.34.1 21-Mar-2008  chris Sync with head.
 1.13.4.1 16-May-2008  yamt sync with head.
 1.13.2.1 18-May-2008  yamt sync with head.
 1.14.32.1 23-Jun-2011  cherry Catchup with rmind-uvmplock merge.
 1.14.28.1 06-Jun-2011  jruoho Sync with HEAD.
 1.14.22.1 12-Jun-2011  rmind sync with head
 1.16.54.1 10-Jun-2019  christos Sync with HEAD
 1.16.52.1 26-Dec-2018  pgoyette Sync with HEAD, resolve a few conflicts
 1.65 28-Aug-2023  andvar acorn32/fdc(4): fix modifiers blkno values to %lld and
fix typos in fr_r10-r12 variables (fh->fr).

Fixes acorn32 build with FD_DEBUG enabled option.
 1.64 07-Aug-2021  thorpej Merge thorpej-cfargs2.
 1.63 24-Apr-2021  thorpej branches: 1.63.8;
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?).
 1.62 20-Nov-2020  thorpej branches: 1.62.2;
malloc(9) -> kmem(9)
 1.61 10-Nov-2019  chs branches: 1.61.8;
in many device attach paths, allocate memory with M_WAITOK instead of M_NOWAIT
and remove code to handle failures that can no longer happen.
 1.60 08-Feb-2019  mrg make *fd*.c's fd_dev_to_type() always a static inline. some
have it as a const, and have code to copy the defaults to
modify them before using them, but that probably requires a
real test to feel confident in changing.
 1.59 03-Sep-2018  riastradh Rename min/max -> uimin/uimax for better honesty.

These functions are defined on unsigned int. The generic name
min/max should not silently truncate to 32 bits on 64-bit systems.
This is purely a name change -- no functional change intended.

HOWEVER! Some subsystems have

#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))

even though our standard name for that is MIN/MAX. Although these
may invite multiple evaluation bugs, these do _not_ cause integer
truncation.

To avoid `fixing' these cases, I first changed the name in libkern,
and then compile-tested every file where min/max occurred in order to
confirm that it failed -- and thus confirm that nothing shadowed
min/max -- before changing it.

I have left a handful of bootloaders that are too annoying to
compile-test, and some dead code:

cobalt ews4800mips hp300 hppa ia64 luna68k vax
acorn32/if_ie.c (not included in any kernels)
macppc/if_gm.c (superseded by gem(4))

It should be easy to fix the fallout once identified -- this way of
doing things fails safe, and the goal here, after all, is to _avoid_
silent integer truncations, not introduce them.

Maybe one day we can reintroduce min/max as type-generic things that
never silently truncate. But we should avoid doing that for a while,
so that existing code has a chance to be detected by the compiler for
conversion to uimin/uimax without changing the semantics until we can
properly audit it all. (Who knows, maybe in some cases integer
truncation is actually intended!)
 1.58 26-Apr-2015  mlelstv branches: 1.58.2; 1.58.8; 1.58.16; 1.58.18;
Use C99-style initializers for struct dkdriver.
 1.57 02-Jan-2015  christos We have three sets of DTYPE_ constants in the kernel:
altq Drop Type
disklabel Disk Type
file Descriptor Type
(not to mention constants that contain the string DTYPE).
Let's make them two, by changing the disklabel one to be DisK TYPE since the
other disklabel constants seem to do that. Not many userland programs use
these constants (and the ones that they do are mostly in ifdefs). They will
be fixed shortly.
 1.56 25-Oct-2014  skrll branches: 1.56.2;
Remove katelib.h and references to it.

{Read,Write}{Word,Byte} macros are provided in the files that still use
them. Someone(tm) should convert them to bus_space(9)
 1.55 25-Jul-2014  dholland Add d_discard to all struct cdevsw instances I could find.

All have been set to "nodiscard"; some should get a real implementation.
 1.54 25-Jul-2014  dholland Add d_discard to all struct bdevsw instances I could find.

I've set them all to nodiscard. Some of them (wd, dk, vnd, ld,
raidframe, maybe cgd) should be implemented for real.
 1.53 16-Mar-2014  dholland branches: 1.53.2;
Change (mostly mechanically) every cdevsw/bdevsw I can find to use
designated initializers.

I have not built every extant kernel so I have probably broken at
least one build; however I've also found and fixed some wrong
cdevsw/bdevsw entries so even if so I think we come out ahead.
 1.52 27-Oct-2012  chs branches: 1.52.2;
split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.
 1.51 19-Jul-2011  dyoung branches: 1.51.2; 1.51.12;
Change <machine/bus.h> to <sys/bus.h> throughout.

Split bus.h -> bus_{defs,funcs}.h.

Mark acorn32/bus.h obsolete.
 1.50 03-Jun-2011  matt device_t, cfdata_t, device_private, device_xname cleanup
CFATTACH_DECL_NEW for struct device only devices
bump SYMTAB_SPACE for EB7500ATX
 1.49 09-Dec-2010  uebayasi branches: 1.49.2; 1.49.6;
Fix DEBUG build.
 1.48 28-Nov-2010  hannken As md(4) no longer has "needs-count" there is no "md.h" anymore.
Remove the inclusion of this file.

Acorn32 now always builds load_memory_disc_from_floppy(). This should
not be a problem as all configs have md(4).

Observed by: Masao Uebayashi <uebayasi@netbsd.org>
 1.47 24-Feb-2010  dyoung branches: 1.47.2;
Use device_private().
 1.46 12-May-2009  cegger branches: 1.46.2;
use device_xname()
 1.45 14-Mar-2009  dsl ANSIfy another 1261 function definitions.
The only ones left in sys are beyond by sed script!
(or in sys/dist or sys/external)
Mostly they have function pointer parameters.
 1.44 14-Mar-2009  dsl 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.)
 1.43 14-Mar-2009  dsl Remove all the __P() from sys (excluding sys/dist)
Diff checked with grep and MK1 eyeball.
i386 and amd64 GENERIC and sys still build.
 1.42 14-Feb-2009  cegger build & bugfix: spl0 is an alias for splx(IPL_NONE), which effectively results in calling splx() twice.
 1.41 13-Jan-2009  yamt branches: 1.41.2;
g/c BUFQ_FOO() macros and use bufq_foo() directly.
 1.40 16-Dec-2008  christos replace bitmask_snprintf(9) with snprintb(3)
 1.39 12-Jun-2008  cegger branches: 1.39.4;
use device_lookup_private to get softc
 1.38 28-Apr-2008  martin branches: 1.38.2; 1.38.4;
Remove clause 3 and 4 from TNF licenses
 1.37 08-Jan-2008  matt branches: 1.37.6; 1.37.8; 1.37.10;
Remove unused variable.
 1.36 05-Jan-2008  ad Missing arg to cv_timedwait().
 1.35 02-Jan-2008  ad Merge vmlocking2 to head.
 1.34 25-Oct-2007  yamt branches: 1.34.2; 1.34.4; 1.34.8;
fix warnings.
 1.33 17-Oct-2007  garbled 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.
 1.32 08-Oct-2007  ad branches: 1.32.2;
Merge brelse() changes from the vmlocking branch.
 1.31 08-Oct-2007  ad Merge disk init changes from the vmlocking branch. These seperate init /
destroy of 'struct disk' from attach / detach.
 1.30 29-Jul-2007  ad branches: 1.30.2; 1.30.4; 1.30.6; 1.30.8; 1.30.10;
It's not a good idea for device drivers to modify b_flags, as they don't
need to understand the locking around that field. Instead of setting
B_ERROR, set b_error instead. b_error is 'owned' by whoever completes
the I/O request.
 1.29 09-Jul-2007  ad branches: 1.29.2; 1.29.4;
Merge some of the less invasive changes from the vmlocking branch:

- kthread, callout, devsw API changes
- select()/poll() improvements
- miscellaneous MT safety improvements
 1.28 04-Mar-2007  christos branches: 1.28.2; 1.28.4; 1.28.10;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.
 1.27 15-Feb-2007  reinoud branches: 1.27.2;
Rename the B_XXX flag to B_DEVPRIVATE flag since it was never used for
debugging and its main use is in device drivers. Its used there to signal
that the flagged buffer has a special meaning or should be handled
differently.

OK'd by Bill Sudenmund on tech-kern.
 1.26 14-Apr-2006  blymn Make i/o statistics collection more generic, include tape drives and
nfs mounts in the set of devices that statistics will be reported on.
 1.25 26-Mar-2006  thorpej Use device_unit().
 1.24 23-Feb-2006  thorpej branches: 1.24.2; 1.24.4; 1.24.6;
Use device_parent().
 1.23 24-Dec-2005  perry branches: 1.23.2; 1.23.4; 1.23.6;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.
 1.22 11-Dec-2005  christos merge ktrace-lwp.
 1.21 15-Oct-2005  yamt - change the way to specify a bufq strategy. (by string rather than by number)
- rather than embedding bufq_state in driver softc,
have a pointer to the former.
- move bufq related functions from kern/subr_disk.c to kern/subr_bufq.c.
- rename method to strategy for consistency.
- move some definitions which don't need to be exposed to the rest of kernel
from sys/bufq.h to sys/bufq_impl.h.
(is it better to move it to kern/ or somewhere?)
- fix some obvious breakage in dev/qbus/ts.c. (not tested)
 1.20 09-Jun-2005  he branches: 1.20.2;
Adapt to compiling with -Wcast-qual and -Wshadow.
 1.19 28-Oct-2004  yamt move buffer queue related stuffs from buf.h to their own header, bufq.h.
 1.18 07-Aug-2003  agc Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.
 1.17 14-Jul-2003  lukem use __KERNEL_RCSID() in a consistent manner
 1.16 18-Jun-2003  drochner branches: 1.16.2;
don't #include <sys/dkstat.h> where it is (appearently) unused
 1.15 19-Apr-2003  bjh21 Fix format string mismatch.
 1.14 31-Jan-2003  thorpej Fix printf format from daddr_t changes.
 1.13 01-Jan-2003  thorpej Use aprint_normal() for cfprint routines.
 1.12 01-Nov-2002  mrg implement separate read/write disk statistics:
- disk_unbusy() gets a new parameter to tell the IO direction.
- struct disk_sysctl gets 4 new members for read/write bytes/transfers.
when processing hw.diskstats, add the read&write bytes/transfers for
the old combined stats to attempt to keep backwards compatibility.

unfortunately, due to multiple bugs, this will cause new kernels and old
vmstat/iostat/systat programs to fail. however, the next time this is
change it will not fail again.

this is just the kernel portion.
 1.11 23-Oct-2002  jdolecek merge kqueue branch into -current

kqueue provides a stateful and efficient event notification framework
currently supported events include socket, file, directory, fifo,
pipe, tty and device changes, and monitoring of processes and signals

kqueue is supported by all writable filesystems in NetBSD tree
(with exception of Coda) and all device drivers supporting poll(2)

based on work done by Jonathan Lemon for FreeBSD
initial NetBSD port done by Luke Mewburn and Jason Thorpe
 1.10 02-Oct-2002  thorpej branches: 1.10.2;
Fix script-o's in previous.
 1.9 02-Oct-2002  thorpej Use CFATTACH_DECL().
 1.8 27-Sep-2002  thorpej Declare all cfattach structures const.
 1.7 27-Sep-2002  provos remove trailing \n in panic(). approved perry.
 1.6 06-Sep-2002  gehenna 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.
 1.5 27-Jul-2002  hannken Convert to new device buffer queue interface.

Approved by: Reinoud Zandijk <reinoud@netbsd.org>
 1.4 20-Dec-2001  thorpej branches: 1.4.2; 1.4.10;
* Share a common vector page between arm26 and arm32.
* Use a common set of exception handlers for all arm32 platforms.
* New FIQ framework based on discussions with Ben Harris, shared
between arm26 and arm32.
 1.3 27-Nov-2001  thorpej Use <machine/intr.h>, not <machine/irqhandler.h>
 1.2 22-Nov-2001  thorpej Kill <machine/katelib.h>. Any place that still uses it should just
reference <arm/arm32/katelib.h> until such time as all use of this
file has been purged from the face of the earth.
 1.1 05-Oct-2001  reinoud branches: 1.1.4;
Initial commit of the splitting off of arch/acorn32 from arch/arm32.

The IOMD/VIDC combination is now moved to arch/arm/iomd together. These
files still need a lot of cleaning up :( .... esp. the RC7500 support that
is still dormant in it; this needs either to be removed or split out for
RC7500's ``VIDC'' video/audio variant.

Apart from the RC7500 support wich is still in arch/arm32 the
iomd,vidc,riscpc and podulebus subdirectories of arch/arm32 can be removed.

This split still uses some small parts of arch/arm32 .... those are the MI
parts that haven't been moved yet.

RiscPC/A7000 have been tested and confirmed to build as should NC.
 1.1.4.9 03-Jan-2003  thorpej Sync with HEAD.
 1.1.4.8 11-Nov-2002  nathanw Catch up to -current
 1.1.4.7 18-Oct-2002  nathanw Catch up to -current.
 1.1.4.6 17-Sep-2002  nathanw Catch up to -current.
 1.1.4.5 01-Aug-2002  nathanw Catch up to -current.
 1.1.4.4 24-Jun-2002  nathanw Curproc->curlwp renaming.

Change uses of "curproc->l_proc" back to "curproc", which is more like the
original use. Bare uses of "curproc" are now "curlwp".

"curproc" is now #defined in proc.h as ((curlwp) ? (curlwp)->l_proc) : NULL)
so that it is always safe to reference curproc (*de*referencing curproc
is another story, but that's always been true).
 1.1.4.3 08-Jan-2002  nathanw Catch up to -current.
 1.1.4.2 15-Nov-2001  thorpej Machine-dependent kernel mods for scheduler activations on
32-bit ARM processors. Kernel boots multi-user on an XScale,
but upcalls not yet tested.
 1.1.4.1 05-Oct-2001  thorpej file fd.c was added on branch nathanw_sa on 2001-11-15 08:30:30 +0000
 1.4.10.4 30-Aug-2002  gehenna catch up with -current.
 1.4.10.3 16-May-2002  gehenna Replace the hard-coded major with calling devsw API.
 1.4.10.2 16-May-2002  gehenna Add the block/character device switches.
 1.4.10.1 16-May-2002  gehenna Include sys/conf.h instead of machine/conf.h (obsoleted)
 1.4.2.4 10-Oct-2002  jdolecek sync kqueue with -current; this includes merge of gehenna-devsw branch,
merge of i386 MP branch, and part of autoconf rototil work
 1.4.2.3 06-Sep-2002  jdolecek sync kqueue branch with HEAD
 1.4.2.2 10-Jan-2002  thorpej Sync kqueue branch with -current.
 1.4.2.1 20-Dec-2001  thorpej file fd.c was added on branch kqueue on 2002-01-10 19:36:28 +0000
 1.10.2.2 09-Nov-2002  bjh21 Catch up to -current.
 1.10.2.1 24-Oct-2002  bjh21 Sync with trunk.
 1.16.2.7 10-Nov-2005  skrll Sync with HEAD. Here we go again...
 1.16.2.6 02-Nov-2004  skrll Sync with HEAD.
 1.16.2.5 21-Sep-2004  skrll Fix the sync with head I botched.
 1.16.2.4 18-Sep-2004  skrll Sync with HEAD.
 1.16.2.3 05-Aug-2004  skrll Fix some merge mistakes.
 1.16.2.2 03-Aug-2004  skrll Sync with HEAD
 1.16.2.1 03-Jul-2003  wrstuden lwp-ify a lot of the arm drivers. Needed to get acorn32/GENERIC compiling.
 1.20.2.5 21-Jan-2008  yamt sync with head
 1.20.2.4 27-Oct-2007  yamt sync with head.
 1.20.2.3 03-Sep-2007  yamt sync with head.
 1.20.2.2 26-Feb-2007  yamt sync with head.
 1.20.2.1 21-Jun-2006  yamt sync with head.
 1.23.6.1 22-Apr-2006  simonb Sync with head.
 1.23.4.1 09-Sep-2006  rpaulo sync with head
 1.23.2.1 01-Mar-2006  yamt sync with head.
 1.24.6.4 24-May-2006  tron Merge 2006-05-24 NetBSD-current into the "peter-altq" branch.
 1.24.6.3 28-Mar-2006  tron Merge 2006-03-28 NetBSD-current into the "peter-altq" branch.
 1.24.6.2 28-Mar-2006  tron Merge 2006-03-28 NetBSD-current into the "peter-altq" branch.
 1.24.6.1 28-Mar-2006  tron Merge 2006-03-28 NetBSD-current into the "peter-altq" branch.
 1.24.4.1 19-Apr-2006  elad sync with head - hopefully this will work
 1.24.2.2 24-May-2006  yamt sync with head.
 1.24.2.1 01-Apr-2006  yamt sync with head.
 1.27.2.1 12-Mar-2007  rmind Sync with HEAD.
 1.28.10.2 16-Oct-2007  garbled Sync with HEAD
 1.28.10.1 03-Oct-2007  garbled Sync with HEAD
 1.28.4.1 11-Jul-2007  mjf Sync with head.
 1.28.2.5 03-Dec-2007  ad Sync with HEAD.
 1.28.2.4 09-Oct-2007  ad Sync with head.
 1.28.2.3 20-Aug-2007  ad - Alter disk attach/detach to fix a panic when closing a vnd device.
- Sync with HEAD.
 1.28.2.2 19-Aug-2007  ad - Back out the biodone() changes.
- Eliminate B_ERROR (from HEAD).
 1.28.2.1 15-Jul-2007  ad Sync with head.
 1.29.4.1 15-Aug-2007  skrll Sync with HEAD.
 1.29.2.1 07-Aug-2007  matt Sync with HEAD.
 1.30.10.1 14-Oct-2007  yamt sync with head.
 1.30.8.2 09-Jan-2008  matt sync with HEAD
 1.30.8.1 06-Nov-2007  matt sync with HEAD
 1.30.6.3 09-Feb-2008  chris Add initial reworking of acorn32 to use new interrupt code.

Note that cats probably won't work currently as acorn32 changed the way
that the pic is registered, it has to provide the irq lines as on acorn32
we attach the iomd after we need to register irqs for the pioc. So we
setup the irqs for iomd before malloc etc are available. This needs
to be fixed.

More work is still needed to update most of the podulebus drivers.
First I need to add podulebus wrapper for interrupts that handles the
maskaddr and maskbits. Exposing them to the common irq code is wrong.
 1.30.6.2 20-Jan-2008  chris Sync to HEAD.
 1.30.6.1 01-Jan-2008  chris Sync with HEAD.
 1.30.4.2 28-Oct-2007  joerg Sync with HEAD.
 1.30.4.1 26-Oct-2007  joerg Sync with HEAD.

Follow the merge of pmap.c on i386 and amd64 and move
pmap_init_tmp_pgtbl into arch/x86/x86/pmap.c. Modify the ACPI wakeup
code to restore CR4 before jumping back into kernel space as the large
page option might cover that.
 1.30.2.1 28-Feb-2008  rjs Sync with HEAD.
 1.32.2.1 13-Nov-2007  bouyer Sync with HEAD
 1.34.8.2 08-Jan-2008  bouyer Sync with HEAD
 1.34.8.1 02-Jan-2008  bouyer Sync with HEAD
 1.34.4.2 31-Dec-2007  ad Catch up with buffer cache changes.
 1.34.4.1 31-Dec-2007  ad Make compile with new buffer cache locking scheme.

XXX This should be largely MI, please do not make another clone of disksubr.c.
 1.34.2.1 18-Feb-2008  mjf Sync with HEAD.
 1.37.10.4 11-Mar-2010  yamt sync with head
 1.37.10.3 16-May-2009  yamt sync with head
 1.37.10.2 04-May-2009  yamt sync with head.
 1.37.10.1 16-May-2008  yamt sync with head.
 1.37.8.2 17-Jun-2008  yamt sync with head.
 1.37.8.1 18-May-2008  yamt sync with head.
 1.37.6.3 17-Jan-2009  mjf Sync with HEAD.
 1.37.6.2 29-Jun-2008  mjf Sync with HEAD.
 1.37.6.1 02-Jun-2008  mjf Sync with HEAD.
 1.38.4.1 18-Jun-2008  simonb Sync with head.
 1.38.2.1 23-Jun-2008  wrstuden Sync w/ -current. 34 merge conflicts to follow.
 1.39.4.3 28-Apr-2009  skrll Sync with HEAD.
 1.39.4.2 03-Mar-2009  skrll Sync with HEAD.
 1.39.4.1 19-Jan-2009  skrll Sync with HEAD.
 1.41.2.1 13-May-2009  jym Sync with HEAD.

Commit is split, to avoid a "too many arguments" protocol error.
 1.46.2.1 30-Apr-2010  uebayasi Sync with HEAD.
 1.47.2.2 12-Jun-2011  rmind sync with head
 1.47.2.1 05-Mar-2011  rmind sync with head
 1.49.6.1 23-Jun-2011  cherry Catchup with rmind-uvmplock merge.
 1.49.2.1 06-Jun-2011  jruoho Sync with HEAD.
 1.51.12.3 03-Dec-2017  jdolecek update from HEAD
 1.51.12.2 20-Aug-2014  tls Rebase to HEAD as of a few days ago.
 1.51.12.1 20-Nov-2012  tls Resync to 2012-11-19 00:00:00 UTC
 1.51.2.2 22-May-2014  yamt sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs. ("Protocol error: too many arguments")
 1.51.2.1 30-Oct-2012  yamt sync with head
 1.52.2.1 18-May-2014  rmind sync with head
 1.53.2.1 10-Aug-2014  tls Rebase.
 1.56.2.2 06-Jun-2015  skrll Sync with HEAD
 1.56.2.1 06-Apr-2015  skrll Sync with HEAD
 1.58.18.2 13-Apr-2020  martin Mostly merge changes from HEAD upto 20200411
 1.58.18.1 10-Jun-2019  christos Sync with HEAD
 1.58.16.1 06-Sep-2018  pgoyette Sync with HEAD

Resolve a couple of conflicts (result of the uimin/uimax changes)
 1.58.8.1 27-Apr-2017  pgoyette Restore all work from the former pgoyette-localcount branch (which is
now abandoned doe to cvs merge botch).

The branch now builds, and installs via anita. There are still some
problems (cgd is non-functional and all atf tests time-out) but they
will get resolved soon.
 1.58.2.3 20-Jul-2016  pgoyette Adapt the machine/arch dependent code to the new {b,c}devsw reference
counting.

XXX Most of these will require testing by someone other than myself, as
I have a limited selection of hardware!
 1.58.2.2 20-Jul-2016  pgoyette Redo previous. Rather than separately extracting the device_t, we can
rely on sc->sc_dev when we need to call device_release().
 1.58.2.1 19-Jul-2016  pgoyette Instead of repeatedly typing the conditional initialization of the
.d_localcount members in the various {b,c}devsw, define an initializer
macro and use it. This also removes the need for defining new symbols
for each 'struct localcount'.

As suggested by riastradh@
 1.61.8.1 14-Dec-2020  thorpej Sync w/ HEAD.
 1.62.2.1 21-Mar-2021  thorpej Give config_found() the same variadic arguments treatment as
config_search(). This commit only adds the CFARG_EOL sentinel
to the existing config_found() calls. Conversion of config_found_sm_loc()
and config_found_ia() call sites will be in subsequent commits.
 1.63.8.1 03-Aug-2021  thorpej Adapt to CFARGS().
 1.5 30-Jun-2011  wiz dependant -> dependent
 1.4 11-Dec-2005  christos merge ktrace-lwp.
 1.3 07-Aug-2003  agc Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.
 1.2 09-Apr-2003  thorpej branches: 1.2.2;
Use PAGE_SIZE rather than NBPG.
 1.1 05-Oct-2001  reinoud branches: 1.1.4; 1.1.6;
Initial commit of the splitting off of arch/acorn32 from arch/arm32.

The IOMD/VIDC combination is now moved to arch/arm/iomd together. These
files still need a lot of cleaning up :( .... esp. the RC7500 support that
is still dormant in it; this needs either to be removed or split out for
RC7500's ``VIDC'' video/audio variant.

Apart from the RC7500 support wich is still in arch/arm32 the
iomd,vidc,riscpc and podulebus subdirectories of arch/arm32 can be removed.

This split still uses some small parts of arch/arm32 .... those are the MI
parts that haven't been moved yet.

RiscPC/A7000 have been tested and confirmed to build as should NC.
 1.1.6.2 10-Jan-2002  thorpej Sync kqueue branch with -current.
 1.1.6.1 05-Oct-2001  thorpej file fdreg.h was added on branch kqueue on 2002-01-10 19:36:28 +0000
 1.1.4.2 05-Oct-2001  reinoud Initial commit of the splitting off of arch/acorn32 from arch/arm32.

The IOMD/VIDC combination is now moved to arch/arm/iomd together. These
files still need a lot of cleaning up :( .... esp. the RC7500 support that
is still dormant in it; this needs either to be removed or split out for
RC7500's ``VIDC'' video/audio variant.

Apart from the RC7500 support wich is still in arch/arm32 the
iomd,vidc,riscpc and podulebus subdirectories of arch/arm32 can be removed.

This split still uses some small parts of arch/arm32 .... those are the MI
parts that haven't been moved yet.

RiscPC/A7000 have been tested and confirmed to build as should NC.
 1.1.4.1 05-Oct-2001  reinoud file fdreg.h was added on branch nathanw_sa on 2001-10-05 22:27:54 +0000
 1.2.2.3 21-Sep-2004  skrll Fix the sync with head I botched.
 1.2.2.2 18-Sep-2004  skrll Sync with HEAD.
 1.2.2.1 03-Aug-2004  skrll Sync with HEAD
 1.13 27-Dec-2019  msaitoh s/manaul/manual/ in comment.
 1.12 19-Jul-2011  dyoung branches: 1.12.54;
Change <machine/bus.h> to <sys/bus.h> throughout.

Split bus.h -> bus_{defs,funcs}.h.

Mark acorn32/bus.h obsolete.
 1.11 03-Jun-2011  matt device_t, cfdata_t, device_private, device_xname cleanup
CFATTACH_DECL_NEW for struct device only devices
bump SYMTAB_SPACE for EB7500ATX
 1.10 13-Apr-2008  chris branches: 1.10.26; 1.10.32; 1.10.36;
Fix device_t/softc split fallout.

A device_t should never be cast with void*. This fixes reboot on acorn32.
I also suspect it'll fix a panic mjf was seeing due to corruption of the
alldevs list.
 1.9 07-Mar-2008  cube Split the softc from the device_t for all lpt(4) variants and attachments
except the ppbus stuff (which doesn't compile) and ulpt(4) which is
unrelated and can be dealt with separately.

As usual, it comes with related cosmetic changes.
 1.8 02-Oct-2002  thorpej branches: 1.8.24; 1.8.86; 1.8.88; 1.8.108; 1.8.112;
Fix script-o's in previous.
 1.7 02-Oct-2002  thorpej Use CFATTACH_DECL().
 1.6 27-Sep-2002  thorpej Declare all cfattach structures const.
 1.5 10-Mar-2002  bjh21 __RCSID -> __KERNEL_RCSID
 1.4 17-Feb-2002  bjh21 Add __RCSID().
 1.3 17-Feb-2002  bjh21 Add prototypes for lpt_port_test() and lptprobe().
 1.2 27-Nov-2001  thorpej branches: 1.2.2;
Use <machine/intr.h>, not <machine/irqhandler.h>
 1.1 05-Oct-2001  reinoud branches: 1.1.4;
Initial commit of the splitting off of arch/acorn32 from arch/arm32.

The IOMD/VIDC combination is now moved to arch/arm/iomd together. These
files still need a lot of cleaning up :( .... esp. the RC7500 support that
is still dormant in it; this needs either to be removed or split out for
RC7500's ``VIDC'' video/audio variant.

Apart from the RC7500 support wich is still in arch/arm32 the
iomd,vidc,riscpc and podulebus subdirectories of arch/arm32 can be removed.

This split still uses some small parts of arch/arm32 .... those are the MI
parts that haven't been moved yet.

RiscPC/A7000 have been tested and confirmed to build as should NC.
 1.1.4.5 18-Oct-2002  nathanw Catch up to -current.
 1.1.4.4 01-Apr-2002  nathanw Catch up to -current.
(CVS: It's not just a program. It's an adventure!)
 1.1.4.3 28-Feb-2002  nathanw Catch up to -current.
 1.1.4.2 08-Jan-2002  nathanw Catch up to -current.
 1.1.4.1 05-Oct-2001  nathanw file lpt_pioc.c was added on branch nathanw_sa on 2002-01-08 00:22:46 +0000
 1.2.2.4 10-Oct-2002  jdolecek sync kqueue with -current; this includes merge of gehenna-devsw branch,
merge of i386 MP branch, and part of autoconf rototil work
 1.2.2.3 16-Mar-2002  jdolecek Catch up with -current.
 1.2.2.2 10-Jan-2002  thorpej Sync kqueue branch with -current.
 1.2.2.1 27-Nov-2001  thorpej file lpt_pioc.c was added on branch kqueue on 2002-01-10 19:36:28 +0000
 1.8.112.2 02-Jun-2008  mjf Sync with HEAD.
 1.8.112.1 03-Apr-2008  mjf Sync with HEAD.
 1.8.108.1 24-Mar-2008  keiichi sync with head.
 1.8.88.1 23-Mar-2008  matt sync with HEAD
 1.8.86.1 21-Mar-2008  chris Sync with head.
 1.8.24.1 17-Mar-2008  yamt sync with head.
 1.10.36.1 23-Jun-2011  cherry Catchup with rmind-uvmplock merge.
 1.10.32.1 06-Jun-2011  jruoho Sync with HEAD.
 1.10.26.1 12-Jun-2011  rmind sync with head
 1.12.54.1 08-Apr-2020  martin Merge changes from current as of 20200406
 1.20 07-Aug-2021  thorpej Merge thorpej-cfargs2.
 1.19 24-Apr-2021  thorpej branches: 1.19.8;
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?).
 1.18 27-Oct-2012  chs branches: 1.18.52;
split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.
 1.17 19-Jul-2011  dyoung branches: 1.17.2; 1.17.12;
Change <machine/bus.h> to <sys/bus.h> throughout.

Split bus.h -> bus_{defs,funcs}.h.

Mark acorn32/bus.h obsolete.
 1.16 03-Jun-2011  matt device_t, cfdata_t, device_private, device_xname cleanup
CFATTACH_DECL_NEW for struct device only devices
bump SYMTAB_SPACE for EB7500ATX
 1.15 12-May-2009  cegger branches: 1.15.4; 1.15.6; 1.15.10;
use device_xname()
 1.14 14-Mar-2009  dsl 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.)
 1.13 14-Mar-2009  dsl Remove all the __P() from sys (excluding sys/dist)
Diff checked with grep and MK1 eyeball.
i386 and amd64 GENERIC and sys still build.
 1.12 11-Dec-2005  christos branches: 1.12.80; 1.12.88; 1.12.94;
merge ktrace-lwp.
 1.11 26-Aug-2005  drochner s/locdesc_t/int/g
 1.10 30-Jun-2005  drochner branches: 1.10.2;
adaptions to config_search() change, and minor autoconf fixes, mostly from Havard Eidnes
 1.9 28-Jun-2005  drochner convert remaining autoconf bus "submatch" functions to use the new
signature (passing locators), and remove some which obviously don't
serve any purpose
(untested, sorry)
 1.8 14-Dec-2004  chs use the generated macros in locators.h rather than hard-coded numbers
to index the cf_loc[] array. reviewed by allen briggs.
 1.7 14-Jul-2003  lukem use __KERNEL_RCSID() in a consistent manner
 1.6 01-Jan-2003  thorpej branches: 1.6.2;
Use aprint_normal() for cfprint routines.
 1.5 02-Oct-2002  thorpej Fix script-o's in previous.
 1.4 02-Oct-2002  thorpej Use CFATTACH_DECL().
 1.3 27-Sep-2002  thorpej Declare all cfattach structures const.
 1.2 27-Sep-2002  thorpej Introduce a new routine, config_match(), which invokes the
cfattach->ca_match function in behalf of the caller. Use it
rather than invoking cfattach->ca_match directly.
 1.1 05-Oct-2001  reinoud branches: 1.1.4; 1.1.6;
Initial commit of the splitting off of arch/acorn32 from arch/arm32.

The IOMD/VIDC combination is now moved to arch/arm/iomd together. These
files still need a lot of cleaning up :( .... esp. the RC7500 support that
is still dormant in it; this needs either to be removed or split out for
RC7500's ``VIDC'' video/audio variant.

Apart from the RC7500 support wich is still in arch/arm32 the
iomd,vidc,riscpc and podulebus subdirectories of arch/arm32 can be removed.

This split still uses some small parts of arch/arm32 .... those are the MI
parts that haven't been moved yet.

RiscPC/A7000 have been tested and confirmed to build as should NC.
 1.1.6.3 10-Oct-2002  jdolecek sync kqueue with -current; this includes merge of gehenna-devsw branch,
merge of i386 MP branch, and part of autoconf rototil work
 1.1.6.2 10-Jan-2002  thorpej Sync kqueue branch with -current.
 1.1.6.1 05-Oct-2001  thorpej file pioc.c was added on branch kqueue on 2002-01-10 19:36:28 +0000
 1.1.4.3 03-Jan-2003  thorpej Sync with HEAD.
 1.1.4.2 18-Oct-2002  nathanw Catch up to -current.
 1.1.4.1 05-Oct-2001  nathanw file pioc.c was added on branch nathanw_sa on 2002-10-18 02:33:40 +0000
 1.6.2.5 10-Nov-2005  skrll Sync with HEAD. Here we go again...
 1.6.2.4 18-Dec-2004  skrll Sync with HEAD.
 1.6.2.3 21-Sep-2004  skrll Fix the sync with head I botched.
 1.6.2.2 18-Sep-2004  skrll Sync with HEAD.
 1.6.2.1 03-Aug-2004  skrll Sync with HEAD
 1.10.2.1 21-Jun-2006  yamt sync with head.
 1.12.94.1 13-May-2009  jym Sync with HEAD.

Commit is split, to avoid a "too many arguments" protocol error.
 1.12.88.1 28-Apr-2009  skrll Sync with HEAD.
 1.12.80.2 16-May-2009  yamt sync with head
 1.12.80.1 04-May-2009  yamt sync with head.
 1.15.10.1 23-Jun-2011  cherry Catchup with rmind-uvmplock merge.
 1.15.6.1 06-Jun-2011  jruoho Sync with HEAD.
 1.15.4.1 12-Jun-2011  rmind sync with head
 1.17.12.1 20-Nov-2012  tls Resync to 2012-11-19 00:00:00 UTC
 1.17.2.1 30-Oct-2012  yamt sync with head
 1.18.52.8 05-Apr-2021  thorpej Treat config_probe() as if it were a boolean function; don't compare
return value > 0... except for the odd balls, which are now really easy
to spot.
 1.18.52.7 05-Apr-2021  thorpej config_match() -> config_probe() for the straight-forward indirect config
cases. There are still a few odd balls using config_match() which should
be sorted out later.
 1.18.52.6 04-Apr-2021  thorpej CFARG_SUBMATCH -> CFARG_SEARCH for the indirect configuration uses.
 1.18.52.5 03-Apr-2021  thorpej Give config_attach() the tagged variadic argument treatment and
mechanically convert all call sites.
 1.18.52.4 22-Mar-2021  thorpej Audit CFARG_IATTR in config_found() calls, and remove it in situations
where the interface attribute is not ambiguous.
 1.18.52.3 22-Mar-2021  thorpej Mechanical conversion of config_found_sm_loc() -> config_found().
CFARG_IATTR usage needs to be audited.
 1.18.52.2 21-Mar-2021  thorpej CFARG_IATTR usage audit:

If a device carries only one interface attribute, there is no need
to specify it when calling config_search(); that specification is
meant only to disambiguate which interface attribute (which is a
proxy for "what kind of attach args are being used") is having
children attached. cfparent_match() will take care of ensuring that
any potential children can attach to one of the parent's iterface
attributes, and if the parent only carries one, no disambiguation is
necessary.
 1.18.52.1 20-Mar-2021  thorpej The proliferation if config_search_*() and config_found_*() combinations
is a little absurd, so begin to tidy this up:

- Introduce a new cfarg_t enumerated type, that defines the types of
tag-value variadic arguments that can be passed to the various
config_*() functions (CFARG_SUBMATCH, CFARG_IATTR, and CFARG_LOCATORS,
for now, plus a CFARG_EOL sentinel).
- Collapse config_search_*() into config_search() that takes these
variadic arguments.
- Convert all call sites of config_search_*() to the new signature.
Noticed several incorrect usages along the way, which will be
audited in a future commit.
 1.19.8.1 03-Aug-2021  thorpej Adapt to CFARGS().
 1.1 05-Oct-2001  reinoud branches: 1.1.4; 1.1.6;
Initial commit of the splitting off of arch/acorn32 from arch/arm32.

The IOMD/VIDC combination is now moved to arch/arm/iomd together. These
files still need a lot of cleaning up :( .... esp. the RC7500 support that
is still dormant in it; this needs either to be removed or split out for
RC7500's ``VIDC'' video/audio variant.

Apart from the RC7500 support wich is still in arch/arm32 the
iomd,vidc,riscpc and podulebus subdirectories of arch/arm32 can be removed.

This split still uses some small parts of arch/arm32 .... those are the MI
parts that haven't been moved yet.

RiscPC/A7000 have been tested and confirmed to build as should NC.
 1.1.6.2 10-Jan-2002  thorpej Sync kqueue branch with -current.
 1.1.6.1 05-Oct-2001  thorpej file piocreg.h was added on branch kqueue on 2002-01-10 19:36:29 +0000
 1.1.4.2 05-Oct-2001  reinoud Initial commit of the splitting off of arch/acorn32 from arch/arm32.

The IOMD/VIDC combination is now moved to arch/arm/iomd together. These
files still need a lot of cleaning up :( .... esp. the RC7500 support that
is still dormant in it; this needs either to be removed or split out for
RC7500's ``VIDC'' video/audio variant.

Apart from the RC7500 support wich is still in arch/arm32 the
iomd,vidc,riscpc and podulebus subdirectories of arch/arm32 can be removed.

This split still uses some small parts of arch/arm32 .... those are the MI
parts that haven't been moved yet.

RiscPC/A7000 have been tested and confirmed to build as should NC.
 1.1.4.1 05-Oct-2001  reinoud file piocreg.h was added on branch nathanw_sa on 2001-10-05 22:27:54 +0000
 1.2 19-Jul-2011  dyoung Change <machine/bus.h> to <sys/bus.h> throughout.

Split bus.h -> bus_{defs,funcs}.h.

Mark acorn32/bus.h obsolete.
 1.1 05-Oct-2001  reinoud branches: 1.1.4; 1.1.6;
Initial commit of the splitting off of arch/acorn32 from arch/arm32.

The IOMD/VIDC combination is now moved to arch/arm/iomd together. These
files still need a lot of cleaning up :( .... esp. the RC7500 support that
is still dormant in it; this needs either to be removed or split out for
RC7500's ``VIDC'' video/audio variant.

Apart from the RC7500 support wich is still in arch/arm32 the
iomd,vidc,riscpc and podulebus subdirectories of arch/arm32 can be removed.

This split still uses some small parts of arch/arm32 .... those are the MI
parts that haven't been moved yet.

RiscPC/A7000 have been tested and confirmed to build as should NC.
 1.1.6.2 10-Jan-2002  thorpej Sync kqueue branch with -current.
 1.1.6.1 05-Oct-2001  thorpej file piocvar.h was added on branch kqueue on 2002-01-10 19:36:29 +0000
 1.1.4.2 05-Oct-2001  reinoud Initial commit of the splitting off of arch/acorn32 from arch/arm32.

The IOMD/VIDC combination is now moved to arch/arm/iomd together. These
files still need a lot of cleaning up :( .... esp. the RC7500 support that
is still dormant in it; this needs either to be removed or split out for
RC7500's ``VIDC'' video/audio variant.

Apart from the RC7500 support wich is still in arch/arm32 the
iomd,vidc,riscpc and podulebus subdirectories of arch/arm32 can be removed.

This split still uses some small parts of arch/arm32 .... those are the MI
parts that haven't been moved yet.

RiscPC/A7000 have been tested and confirmed to build as should NC.
 1.1.4.1 05-Oct-2001  reinoud file piocvar.h was added on branch nathanw_sa on 2001-10-05 22:27:54 +0000
 1.31 20-Dec-2023  thorpej Remove unnecessary <sys/malloc.h>.
 1.30 20-Oct-2017  jdolecek move ata_queue_alloc(1) and ata_queue_free() calls to ata_channel_init()
and ata_channel_destroy() respectively, to make attachment code simpler,
and to make it easier to spot special queue manipulation like cmdide(4)

on topic of PR kern/52606
 1.29 07-Oct-2017  jdolecek Merge support for SATA NCQ (Native Command Queueing) from jdolecek-ncq branch

ATA subsystem was changed to support several outstanding commands, and use
NCQ xfers if supported by both the controller and the disk, including NCQ
error recovery. Set NCQ high priority for BPRIO_TIMECRITICAL xfers
if supported. Added FUA support.

Done some work towards MP-safe, all ATA code tsleep()/wakeup() replaced
by condvars, and switched most code from spl* to mutexes (separate
wd(4) and ata channel lock).

Introduced new option WD_CHAOS_MONKEY to facilitate testing of error
handling, fixed several uncovered issues. Also fixed several problems
with kernel dump to wd(4) disk.

Tested with ahcisata(4), mvsata(4), siisata(4), piixide(4) on amd64,
with and without port multiplier, both disk and ATAPI devices; other
drivers and archs mechanically adjusted and compile-tested. NCQ is
supported for ahcisata(4) and siisata(4) for any controller, for
mvsata(4) only Gen IIe ones for now. Also enabled ATAPI support in
mvsata(4).

Thanks to Matt Thomas for initial ATA infrastructure patch, and
Jonathan A.Kollasch for siisata(4) NCQ changes and general testing.

Also fixes PR kern/43169 (wd(4)); and PR kern/11811, PR kern/47041,
PR kern/51979 (kernel dump)
 1.28 31-Jul-2012  bouyer branches: 1.28.2; 1.28.28;
Apply back changes that were reverted on Jul 24 and Jul 26 (general ata/wdc
cleanup and SATA PMP support), now that I'm back to fix the fallouts.
 1.27 26-Jul-2012  jakllsch Revert, with intention of restoring in a less invasive way, the SATA Port
Multiplier code.

ok christos@
 1.26 02-Jul-2012  bouyer Add sata Port MultiPlier (PMP) support to the ata bus layer,
as described in
http://mail-index.netbsd.org/tech-kern/2012/06/23/msg013442.html
PMP support in integrated to the atabus layer.
struct ata_channel's ch_drive[] is not dynamically allocated, and ch_ndrive
(renamed to ch_ndrives) closely reflects the size of the ch_drive[] array.
Add helper functions atabus_alloc_drives() and atabus_free_drives()
to manage ch_drive[]/ch_ndrives.
Add wdc_maxdrives to struct wdc_softc so that bus front-end can specify
how much drive they really support (master/slave or single).
ata_reset_drive() callback gains a uint32_t *sigp argument which,
when not NULL, will contain the signature of the device being reset.
While there, some cosmetic changes:
- added a drive_type enum to ata_drive_datas, and stop encoding the
probed drive type in drive_flags (we were out of drive flags anyway).
- rename DRIVE_ATAPIST to DRIVE_ATAPIDSCW to better reflect what this
really is
- remove ata_channel->ata_drives, it's redundant with the pointer in
ata_drive_datas
- factor out the interpretation of SATA signatures in sata_interpet_sig()

propagate these changes to the ATA HBA drivers, and add support for PMP
to ahcisata(4) and siisata(4).

Thanks to:
- Protocase (http://www.protocase.com/) which provided a system
with lots of controllers, SATA PMP and drive slots
- Conservation Genomics Laboratory, Department of Biology, New Mexico State
University for hosting the above system
- Brook Milligan, who set up remote access and has been very responsive
when SATA cable move was needed
 1.25 19-Jul-2011  dyoung branches: 1.25.2;
Change <machine/bus.h> to <sys/bus.h> throughout.

Split bus.h -> bus_{defs,funcs}.h.

Mark acorn32/bus.h obsolete.
 1.24 03-Jun-2011  matt device_t, cfdata_t, device_private, device_xname cleanup
CFATTACH_DECL_NEW for struct device only devices
bump SYMTAB_SPACE for EB7500ATX
 1.23 18-Mar-2008  cube branches: 1.23.26; 1.23.32; 1.23.36;
Set the device_t back pointer in the softc.
 1.22 18-Mar-2008  cube Split device_t and softc for ATA devices, as well as wd(4). Other
cosmetic changes where appropriate.
 1.21 16-Jan-2006  bouyer branches: 1.21.48; 1.21.50; 1.21.70; 1.21.74;
properly use ata_channel->ch_ndrive:
- initialize it properly in the bus front-ends (all 2, exept in wdc_pcmcia.c
for the "Sandisk CompactFlash Card" where it's set to 1)
- remplace hardcoded '2' by ata_channel->ch_ndrive in MI IDE drivers.

From Christos Zoulas in kern/32501.
 1.20 11-Dec-2005  christos branches: 1.20.2;
merge ktrace-lwp.
 1.19 28-Sep-2004  reinoud branches: 1.19.12;
wdc shadow registers need to be initialised later.

Request pullup for 2-0 nessisary?
 1.18 20-Aug-2004  thorpej Move most of wdc_softc into a new atac_softc structure that contains
info common to all types of ATA controllers.
 1.17 14-Aug-2004  thorpej - Split the register handles out of struct wdc_channel into a separate
wdc_regs structure, and array of which (indexed per channel) is pointed
to by struct wdc_softc.
- Move the resulting wdc_channel structure to atavar.h and rename it to
ata_channel. Rename the corresponding flags.
- Add a "ch_ndrive" member to struct ata_channel, which indicates the
maximum number of drives that can be present on the channel. For now,
this is always 2. Add an ATA_MAXDRIVES constant that places an upper
limit on this value, also currently 2.
 1.16 25-May-2004  thorpej Add the notion of "shadow registers" to the wdc driver. These shadow
registers are registers that overlap with others on many controllers, but
which may actually be distinct on some controllers. Right now, the two
shadows are:

- wd_status (usually overlaps wd_command)
- wd_features (usually overlaps wd_error)

Add a new helper function, wdc_init_shadow_regs(), used to initialize
the shadow register handles on controllers where they do actually overlap.

Partially from Jordan Rhody @ Wasabi Systems, Inc.
 1.15 03-Jan-2004  thorpej More wdc_channel structure member namespace cleanup:
- channel -> ch_channel
- wdc -> ch_wdc
 1.14 03-Jan-2004  thorpej Rename "struct channel_softc" to "struct wdc_channel".
 1.13 01-Jan-2004  thorpej Rename:
- wdc_xfer to ata_xfer
- channel_queue to ata_queue
and move them to <dev/ata/atavar.h> so they can be used by non-wdc ATA
controllers. Clean up the member names of these structures while at it.
 1.12 31-Dec-2003  thorpej Simplify allocation of the channel queue.
 1.11 02-Dec-2003  bjh21 Update for new world of indirect wdc registers.
 1.10 08-Oct-2003  bouyer Adapt for wdcattach() prototype change.
 1.9 25-Sep-2003  mycroft Hide the use of config_interrupts() in one place.
 1.8 19-Sep-2003  mycroft 1) Use config_interrupts() to attach IDE and ATAPI drives. This eliminates
most polling.
2) Clean up some goofiness in pciide -- get rid of the whole "candisable" path
(it's gratuitous) and simplify the code by calling pciide_map_compat_intr(),
*_set_modes() and wdc_print_modes() from central locations.
3) Add a register writability and register ghost test to eliminate phantom
drives more quickly.
 1.7 14-Jul-2003  lukem use __KERNEL_RCSID() in a consistent manner
 1.6 02-Oct-2002  thorpej branches: 1.6.8;
Fix script-o's in previous.
 1.5 02-Oct-2002  thorpej Use CFATTACH_DECL().
 1.4 27-Sep-2002  thorpej Declare all cfattach structures const.
 1.3 27-Sep-2002  provos remove trailing \n in panic(). approved perry.
 1.2 27-Nov-2001  thorpej branches: 1.2.2;
Use <machine/intr.h>, not <machine/irqhandler.h>
 1.1 05-Oct-2001  reinoud branches: 1.1.4;
Initial commit of the splitting off of arch/acorn32 from arch/arm32.

The IOMD/VIDC combination is now moved to arch/arm/iomd together. These
files still need a lot of cleaning up :( .... esp. the RC7500 support that
is still dormant in it; this needs either to be removed or split out for
RC7500's ``VIDC'' video/audio variant.

Apart from the RC7500 support wich is still in arch/arm32 the
iomd,vidc,riscpc and podulebus subdirectories of arch/arm32 can be removed.

This split still uses some small parts of arch/arm32 .... those are the MI
parts that haven't been moved yet.

RiscPC/A7000 have been tested and confirmed to build as should NC.
 1.1.4.3 18-Oct-2002  nathanw Catch up to -current.
 1.1.4.2 08-Jan-2002  nathanw Catch up to -current.
 1.1.4.1 05-Oct-2001  nathanw file wdc_pioc.c was added on branch nathanw_sa on 2002-01-08 00:22:46 +0000
 1.2.2.3 10-Oct-2002  jdolecek sync kqueue with -current; this includes merge of gehenna-devsw branch,
merge of i386 MP branch, and part of autoconf rototil work
 1.2.2.2 10-Jan-2002  thorpej Sync kqueue branch with -current.
 1.2.2.1 27-Nov-2001  thorpej file wdc_pioc.c was added on branch kqueue on 2002-01-10 19:36:29 +0000
 1.6.8.5 19-Oct-2004  skrll Sync with HEAD
 1.6.8.4 21-Sep-2004  skrll Fix the sync with head I botched.
 1.6.8.3 18-Sep-2004  skrll Sync with HEAD.
 1.6.8.2 25-Aug-2004  skrll Sync with HEAD.
 1.6.8.1 03-Aug-2004  skrll Sync with HEAD
 1.19.12.2 24-Mar-2008  yamt sync with head.
 1.19.12.1 21-Jun-2006  yamt sync with head.
 1.20.2.1 01-Feb-2006  yamt sync with head.
 1.21.74.1 03-Apr-2008  mjf Sync with HEAD.
 1.21.70.1 24-Mar-2008  keiichi sync with head.
 1.21.50.1 23-Mar-2008  matt sync with HEAD
 1.21.48.1 21-Mar-2008  chris Sync with head.
 1.23.36.1 23-Jun-2011  cherry Catchup with rmind-uvmplock merge.
 1.23.32.1 06-Jun-2011  jruoho Sync with HEAD.
 1.23.26.1 12-Jun-2011  rmind sync with head
 1.25.2.1 30-Oct-2012  yamt sync with head
 1.28.28.2 27-Sep-2017  jdolecek change wdc_init_shadow_regs() to accept only struct wdc_regs, it doesn't
touch anything else

factor out the probe-only struct ata_channel initialization to wdcprobe(), to
reduce duplication of logic in individual drivers, and to actually work now
that more init is needed beyond the memset()
 1.28.28.1 26-Sep-2017  jdolecek switch to ata_queue_alloc() so that this at least compiles
 1.28.2.1 03-Dec-2017  jdolecek update from HEAD

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