Merge thorpej-cfargs2.

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 a

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?).

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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.

Kill some more extern struct cfdriver declarations.

Down with externs in .c!

Modularize the ld driver and all of its attachments. Ensure that all
parents are capable of rescan (or otherwise provide a means of attaching
children post-initialization).

split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

Don't pull in the whole uvm(9) API to access only PAGE_SIZE and
some other constants. These are provided by sys/param.h now.

replace bitmask_snprintf(9) with snprintb(3)

Add support for >2TB arrays and implement raw I/O mode which is a
requirement for this.

N.B. Still to do - move dump on ld to 64-bit disk addresses

Replace device_lookup() with device_lookup_private() on getting softc
for future device_t/softc spilt.

Remove clause 3 and 4 from TNF licenses

use aprint_*_dev and device_xname

Use AAC_PREALLOCATE_FIBS with the softc as a parameter to catch up with
revision 1.10 of aacvar.h.

machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

Merge some of the less invasive changes from the vmlocking branch:

- kthread, callout, devsw API changes
- select()/poll() improvements
- miscellaneous MT safety improvements

Bring in changes from FreeBSD...
* Allocate commands on-demand.
* Update a bunch of constants and some structures.
* Use __attribute__ ((__packed__)) instead of __packed to be consistent.
* Support m

Bring in changes from FreeBSD...
* Allocate commands on-demand.
* Update a bunch of constants and some structures.
* Use __attribute__ ((__packed__)) instead of __packed to be consistent.
* Support more commands for devices that can apparently handle them.
* Support a "new comm. interface" present in more recent Adaptec
firmware. This reduces the amount of PCI bus traffic in handling
commands.
* Support larger commands going to the adapter--if the adapter can
support them.
* Support 64-bit commands for archs where sizeof(bus_addr_t) > 4 and
for adapters that advertise SGMAP64.
* Handle the WINDOW4G option and NO4GB quirk by excluding 2G-4G window
unless we have the WINDOW4G capability without the NO4GB quirk.
* Ask the adapter more about its capabilities and try to use those if
they seem sane.
* Do our bus_dmamap_sync() inside dequeue_fib instead of following,
since we have the information that we need there.
* Provide access functions for some adapters that I haven't seen yet
(MIPS-based "Rocket" adapters). Not yet used.

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Clear interrupt status at once instead of piecemeal.
Enable a few more bits in the I/O requested by ld and check for the fast
response bit when reading back from the queue.
Both changes come from rea

Clear interrupt status at once instead of piecemeal.
Enable a few more bits in the I/O requested by ld and check for the fast
response bit when reading back from the queue.
Both changes come from reading the FreeBSD driver and testing on a Dell
CERC SATA controller.

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Import code from FreeBSD to tell the controller how much physical RAM the
system has. This has the (scary-because-we've-been-running-so-long-
without-it) commit message (for the first version of the

Import code from FreeBSD to tell the controller how much physical RAM the
system has. This has the (scary-because-we've-been-running-so-long-
without-it) commit message (for the first version of the change):
Tell the controller how much physical memory we have. Without this
there was a chance that our DMA regions would collide with the
memory window used by the cache on the controller. The result would
be massive data corruption. This seemed to mainly affect systems with
>2GB of memory.

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Some changes from the FreeBSD driver:
* Include definitions of adapter-initiated fibs.
* Send aifs back to the adapter after we receive them.
* Use indexes instead of pointers in 32-bit hardware regi

Some changes from the FreeBSD driver:
* Include definitions of adapter-initiated fibs.
* Send aifs back to the adapter after we receive them.
* Use indexes instead of pointers in 32-bit hardware registers.
* If we get a message that there's a printf from the adapter, but we have
a NUL in the first character of the printf string, change the NUL to a
space.

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Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

__unused removal on arguments; approved by core.

- sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386

LP54 -> LP64 in a comment.

use %z when printing a sizeof.

Add some casts to make this compile on amd64 (and perhaps other LP64
architectures). Part of PR kern/30456.

The binary object file on i386 confirmed to be exactly the same before
and after the chang

Add some casts to make this compile on amd64 (and perhaps other LP64
architectures). Part of PR kern/30456.

The binary object file on i386 confirmed to be exactly the same before
and after the change.

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