Convert sys/dev to use <sys/rndsource.h>.

Entropy-pool implementation move and cleanup.

1) Move core entropy-pool code and source/sink/sample management code
to sys/kern from sys/dev.

2) Remove use of NRND as test for presence of entrop

Entropy-pool implementation move and cleanup.

1) Move core entropy-pool code and source/sink/sample management code
to sys/kern from sys/dev.

2) Remove use of NRND as test for presence of entropy-pool code throughout
source tree.

3) Remove use of RND_ENABLED in device drivers as microoptimization to
avoid expensive operations on disabled entropy sources; make the
rnd_add calls do this directly so all callers benefit.

4) Fix bug in recent rnd_add_data()/rnd_add_uint32() changes that might
have lead to slight entropy overestimation for some sources.

5) Add new source types for environmental sensors, power sensors, VM
system events, and skew between clocks, with a sample implementation
for each.

ok releng to go in before the branch due to the difficulty of later
pullup (widespread #ifdef removal and moved files). Tested with release
builds on amd64 and evbarm and live testing on amd64.

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Make local functions static.

Split device_t/softc. Tested only on cs at ofisa on shark.

Fix wrong softc size in CFATTACH_DECL(). (not cs_softc but cs_softc_isa)

struct device * -> device_t, no functional changes intended.

struct cfdata * -> cfdata_t, no functional changes intended.

use aprint_*_dev and device_xname

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

__unused removal on arguments; approved by core.

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

merge ktrace-lwp.

nuke trailing whitespace

de-__P

Separate the namespace for default (ie unspecified) locators used
by the isa.c bus driver and the "address/whatever not specified"
argument passed to leaf device drivers.
The former is "ISACF_XXX_DEF

Separate the namespace for default (ie unspecified) locators used
by the isa.c bus driver and the "address/whatever not specified"
argument passed to leaf device drivers.
The former is "ISACF_XXX_DEFAULT" as generaterd by config(8), the latter
"ISA_UNKNOWN_XXX", defined in isavar.h.
This way we save a dependency of every ISA device driver on "locators.h".

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Recode the probe slightly to remove a bogus initializer.
Also, don't do the rest of the probe work if the product ID mismatches, since
we'll return 0 anyway.

Fix uninitialized variable warnings

Fix sizeof and whitespace bug from the script I'm using to do the
CFATTACH_DECL conversion. (Grumble.)

Use CFATTACH_DECL().

Declare all cfattach structures const.

Make it possible to override the way register access is done.
This is needed for some really screwball attachments of the CS8900.

Overhaul of the ISA autoconfiguration code to support direct
configuration of devices logically attached to the ISA bus:

* Change the isa_attach_args to have arrays of io, mem, irq, drq
resources.

Overhaul of the ISA autoconfiguration code to support direct
configuration of devices logically attached to the ISA bus:

* Change the isa_attach_args to have arrays of io, mem, irq, drq
resources.
* Add a "pnpnames" and a linked list of "pnpcompatnames" to the
isa_attach_args. If either of these members are non-NULL,
direct configuration of the bus is being performed. Add an
ISA_DIRECT_CONFIG() macro to test for this.
* Drivers are not allowed to modify the isa_attach_args unless
direct configuration is not being performed and the probe fucntion
is returning success.
* Adapt device drivers -- currently, all driver probe routines return
"no match" if ISA_DIRECT_CONFIG() evaluates to true.

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move dev/isa/cs89x0{.c,{var,reg}.h} into dev/ic
and split isadma parts into /dev/isa/cs89x0isa*.

add RCSID

Um, we need rnd.h so that cs_softc is defined properly. Overrunning structures
is bad.
NOTE: #IFDEF IN SOFTC DEFINITIONS IS BAD.