prinf: replace use of alloca with variable length array.

Use of alloca(3) is discouraged in FreeBSD. Using a VLA
is simple and should be more portable.

Requested by:	jilles
Make the hardware memory and instruction barrier functions work on armv4
and armv5 as well.
Make ofwfb actually work again. Apparently the API it was written against
still exists but is now silently ignored by the VT core. At least xboxfb
needs similar changes.
libedit: add H_SAVE_FP which saves history to a file pointer.

H_SAVE_FP is similar to H_SAVE but operates on a FILE* instead of a filename.
This is useful when operating in capability mode.

Reviewed by:	christos@NetBSD.org, pfg
Make ofwfb not be painfully slow. This reduces the time for a verbose boot
on my G4 iBook by more than half. Still 10% slower than syscons, but that's
much better than a factor of 2.

The slowness had to do with pathological write performance on 8-bit
framebuffers, which are almost universally used on Open Firmware systems.
Writing 1 byte at a time, potentially nonconsecutively, resulted in many
extra PCI write cycles. This patch, in the common case where it's writing
one or several characters in an 8x8 font, gangs the writes together into
a set of 32-bit writes. This is a port of r143830 to vt(4).

The EFI framebuffer is also extremely slow, probably for the same reason,
and the same patch will likely help there.
look(1): add compability with other implementations.

On other implementations 'look -a' uses an alternate dictionary.  Since we don't
have one, just ignore it.
mesg: remove advertising clause

The University of California board of trustees has given permission to remove
the advertising clause of all software attributed to it.
Port over mmap routine from syscons. This lets X11 work on PowerPC with vt.
The last obstacle to switching PowerPC entirely to vt is that the Playstation 3
framebuffer driver needs to be ported over. This only applies for powerpc64,
however.
Use vt(4) by default on 32-bit PowerPC now that it is fully functional and
fast. 64-bit PowerPC will follow along once the PS3 framebuffer driver is
adapted.
Enable SMP for Exynos-based platforms (i.e. Chromebook)

Reviewed by:	br
Add cpu_l2cache_drain_writebuf(), use it to implement generic_bs_barrier().

On modern ARM SoCs the L2 cache controller sits between the CPU and the
AXI bus, and most on-chip memory-mapped devices are on the AXI bus.  We
map the device registers using the 'Device' memory attribute, which means
the memory is not cached, but writes to it are buffered.  Ensuring that a
write has made it all the way to a device may require that the L2
controller take some action.

There is currently only one implementation of the new function, for the
PL310 cache controller.  It invokes a function that the controller
manual calls "cache sync" but it actually has nothing to do with cache at
all, it triggers a drain of all pending store buffer writes and it blocks
until they complete.

The sheeva and xscale L2 controllers (which predate the concept of Device
memory) don't seem to have a corresponding function.  It appears that the
standard armv5 drain_writebuf function includes draining all the way
through the L2 controller.
Move the PS3 framebuffer console to use vt instead of syscons and adjust
GENERIC64 for PowerPC to use vt with it.

Much to my chagrin, PS3 support seems to have bitrotted somewhat since the
last time I tried it. ehci panics on attach and interrupt handling seems
to be faulty. This should be fixed soon...
Optimise host mode data roundtrip time. When BULK data is submitted to
the main processing queue, clear the NAK counter for any associated
BULK or CONTROL transfers and poll the endpoint(s) for 1 millisecond
at 125us rate interval, before going into slow, 10ms, NAK polling mode
again.  This has the effect that typical ping-ping protocols respond
quicker when initiated from the USB host.

MFC after:	2 weeks
Typo fixes and some language/punctuation improvements.
In cf_get_method, when we don't already know what clock speed the CPU is
running at, guess the nearest value instead of looking for a value within
25 MHz of the observed frequency.

Prior to this change, if a system booted with Intel Turbo Boost enabled,
the dev.cpu.0.freq sysctl is nonfunctional, since the ACPI-reported
frequency for Turbo Boost states does not match the actual clock frequency
(and thus no levels are within 25 MHz of the observed frequency) and the
current performance level is read before a new level is set.

MFC after:	3 days
Relnotes:	Bug fix in power management on CPUs with Intel Turbo Boost
Revert accidental commit of SUBDIR_PARALLEL for sys/modules.  (It hasn't
been tested sufficiently).
include: Remove checks for __BSD_VISIBLE where redundant with __XSI_VISIBLE
or __POSIX_VISIBLE.

Whenever <sys/cdefs.h> sets __BSD_VISIBLE to non-zero, it also sets
__POSIX_VISIBLE and __XSI_VISIBLE to the newest version supported.

No functional change is intended.
include: Don't expose L_cuserid in strict C standard compliance mode.

L_cuserid is supposed to be exposed only for old POSIX, or in the default
(expose everything) environment.
Fix interrupt allocation after changes to nexus. This makes PS3 boot
multiuser again (this commit comes from the PS3 itself). Some problems
still exist with SMP, apparently, as I had to boot a non-SMP kernel to
get here.
printf: fix regression after illumos merges.

The "bltin/bltin.h" wrappers do not support exit() and attempting
to call it will exit sh completely.

Note that errx() is acceptable but will always return with status 2.

Reported by:	jilles (and the testing framework)
Fix by:		jilles
Pointyhat:	pfg