remove unneeded includes; ok miod@

timecounting: remove incomplete PPS support

The timecounting code has had stubs for pulse-per-second (PPS) polling
since it was imported in 2004. At this point it seems unlikely that
anyone is goin

timecounting: remove incomplete PPS support

The timecounting code has had stubs for pulse-per-second (PPS) polling
since it was imported in 2004. At this point it seems unlikely that
anyone is going to finish adding PPS support, so let's remove the stubs:

- Delete the dead tc_poll_pps() call from tc_windup().
- Remove all tc_poll_pps symbols from the kernel.

Link: https://marc.info/?l=openbsd-tech&m=167519035723210&w=2

ok miod@

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Constify struct cfattach.

timecounting: use C99-style initialization for all timecounter structs

The timecounter struct is large and I think it may change in the
future. Changing it later will be easier if we use C99-style

timecounting: use C99-style initialization for all timecounter structs

The timecounter struct is large and I think it may change in the
future. Changing it later will be easier if we use C99-style
initialization for all timecounter structs. It also makes reading the
code a bit easier.

For reasons I cannot explain, switching to C99-style initialization
sometimes changes the hash of the resulting object file, even though
the resulting struct should be the same. So there is a binary change
here, but only sometimes. No behavior should change in either case.

I can't compile-test this everywhere but I have been staring at the
diff for days now and I'm relatively confident this will not break
compilation. Fingers crossed.

ok gnezdo@

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Add support for timeconting in userland.

This diff exposes parts of clock_gettime(2) and gettimeofday(2) to
userland via libc eliberating processes from the need for a context
switch everytime they

Add support for timeconting in userland.

This diff exposes parts of clock_gettime(2) and gettimeofday(2) to
userland via libc eliberating processes from the need for a context
switch everytime they want to count the passage of time.

If a timecounter clock can be exposed to userland than it needs to set
its tc_user member to a non-zero value. Tested with one or multiple
counters per architecture.

The timing data is shared through a pointer found in the new ELF
auxiliary vector AUX_openbsd_timekeep containing timehands information
that is frequently updated by the kernel.

Timing differences between the last kernel update and the current time
are adjusted in userland by the tc_get_timecount() function inside the
MD usertc.c file.

This permits a much more responsive environment, quite visible in
browsers, office programs and gaming (apparently one is are able to fly
in Minecraft now).

Tested by robert@, sthen@, naddy@, kmos@, phessler@, and many others!

OK from at least kettenis@, cheloha@, naddy@, sthen@

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dev/rndvar.h no longer has statistical interfaces (removed during various
conversion steps). it only contains kernel prototypes for 4 interfaces,
all of which legitimately belong in sys/systm.h, whi

dev/rndvar.h no longer has statistical interfaces (removed during various
conversion steps). it only contains kernel prototypes for 4 interfaces,
all of which legitimately belong in sys/systm.h, which are already included
by all enqueue_randomness() users.

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Convert sleeps of 1sec or more to tsleep_nsec(9).

ok bluhm@

replace add_*_randomness with enqueue_randomness()

this gets rid of the source annotation which doesn't really add
anything other than adding complexitiy. randomess is generally
good enough that the

replace add_*_randomness with enqueue_randomness()

this gets rid of the source annotation which doesn't really add
anything other than adding complexitiy. randomess is generally
good enough that the few extra bits that the source type would
add are not worth it.

ok mikeb@ deraadt@

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Add a DVACT_WAKEUP op to the *_activate() API. This is called after the
kernel resumes normal (non-cold, able to run processes, etc) operation.
Previously we were relying on specific DVACT_RESUME op

Add a DVACT_WAKEUP op to the *_activate() API. This is called after the
kernel resumes normal (non-cold, able to run processes, etc) operation.
Previously we were relying on specific DVACT_RESUME op's in drivers
creating callback/threads themselves, but that has become too common,
indicating the need for a built-in mechanism.
ok dlg kettenis, tested by a sufficient amount of people

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Use %z* for size_t

while there, fix a few %d into %u

fix: cast void * to char *, fix format args for (u)int64_t,
tc_frequency is unsigned

ok kettenis@

Enforce ca_activate tree-walks over the entire heirarchy for all events,
cleaning up some shutdown-hook related code on the way.
(A few drivers related to sparc are still skipped at kettenis' request

Enforce ca_activate tree-walks over the entire heirarchy for all events,
cleaning up some shutdown-hook related code on the way.
(A few drivers related to sparc are still skipped at kettenis' request)
ok kettenis mlarkin, tested by many others too

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Avoid uninitiliazed use of ctl and corresponding warnings.
Part of the work to remove -Wno-uninitialized.

ok kettenis@

we are past the point where timecounters may disappear
ok miod

use unique wait channels

at resume time, re-nable the AMDPM_RNGEN bit

these files don't need to include proc.h anymore. ok oga for agp

First pass at removing clauses 3 and 4 from NetBSD licenses.

Not sure what's more surprising: how long it took for NetBSD to
catch up to the rest of the BSDs (including UCB), or the amount of
code t

First pass at removing clauses 3 and 4 from NetBSD licenses.

Not sure what's more surprising: how long it took for NetBSD to
catch up to the rest of the BSDs (including UCB), or the amount of
code that NetBSD has claimed for itself without attributing to the
actual authors.

OK deraadt@

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AMD_8111_PMC has timecounter, too; ok grange@ some time ago

convert lockmgr style locks to rwlocks.

input from art@

do not bus_space_map devices which are at address 0; ok kettenis

acpi may steal power management functionality, in which case we
cannot io map the device. Bail out without warning. If we want
to retain the rgn we could re-enable io and be very very careful.

ok

acpi may steal power management functionality, in which case we
cannot io map the device. Bail out without warning. If we want
to retain the rgn we could re-enable io and be very very careful.

ok deraadt@

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Provide more info in error messages so we can see what's going
on. And some cosmetics in debug messages while here.

unbreak the tree. i dunno how this compiled on my box at home.

found by marco@

amdpmreg.h is only used by amdpm.c, so merge the header into the c file.
this unclutters the tree a bit.

ok deraadt@