Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC r232614:

Provide wbwd(4), a driver for the watchdog timer found on various
Winbond Super I/O chips.

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Add hints for i8254 timer on i386 and amd64. Some people report about
systems with PnP/ACPI not reporting i8254 timer. In some cases it can be
fatal, as i8254 can be the only available time counter hardware. From other
side we are now heavily depend on i8254 timer and till the last time it's
init/usage was completely hardcoded. So this change just restores previous
behavior in more regular fashion.

Trim the default set of device hints on i386 and amd64:
- Remove vga0 and the disabled uart2/uart3 hints from both platforms.
- Remove hints for ISA adv0, bt0, aha0, aic0, ed0, cs0, sn0, ie0, fe0, and
le0 from i386. All these hints were marked 'disabled' and thus already
did not work "out of the box".

Discussed with: imp

Make uart(4) the default serial port driver on i386 and amd64.

The uart(4) driver has the advantage of supporting a wider variety of
hardware on a greater amount of platforms. This driver has already been
the standard on platforms such as ia64, powerpc and sparc64.

I've decided not to change anything on pc98. I'd rather let people from
the pc98 team look at this.

Approved by: philip (mentor), marcel

Move i386 to generic RTC handling code.

Make clock_if.m and subr_rtc.c standard on i386

Add hints for "atrtc" driver, for non-PnP, non-ACPI systems.
NB: Make sure to install GENERIC.hints into /boot/device.hints in these!

Nuke MD inittodr(), resettodr() functions.

Don't attach to PHP0B00 in the "attimer" dummy driver any more, and remove
comments that no longer apply for that reason.

Add new "atrtc" device driver, which handles IBM PC AT Real Time
Clock compatible devices using subr_rtc and clock_if.

This driver is not entirely clean: other code still fondles the
hardware to get a statclock interrupt on non-ACPI timer systems.

Wrap some overly long lines.

After it has settled in -current, this will be ported to amd64.

Technically this is MFC'able, but I fail to see a good reason.

"vt" doesn't refer to any existing device anymore. Remove it.

Reviewed by: cognet@ (mentor)
Approved by: cognet@ (mentor)

Backout sensors framework.

Requested by: phk
Discussed on: cvs-all

Import it(4) and lm(4), supporting most popular Super I/O Hardware Monitors.

Submitted by: Constantine A. Murenin <cnst@FreeBSD.org>
Sponsored by: Google Summer of Code 2007 (GSoC2007/cnst-sensors)
Mentored by: syrinx
Tested by: many
OKed by: kensmith
Obtained from: OpenBSD (parts)

- Add C-bus and ISA front-ends for le(4) so it can actually replace
lnc(4) on PC98 and i386. The ISA front-end supports the same non-PNP
network cards as lnc(4) did and additionally a couple of PNP ones.
Like lnc(4), the C-bus front-end of le(4) only supports C-NET(98)S
and is untested due to lack of such hardware, but given that's it's
based on the respective lnc(4) and not too different from the ISA
front-end it should be highly likely to work.
- Remove the descriptions of le(4), which where converted from lnc(4),
from sys/i386/conf/NOTES and sys/pc98/conf/NOTES as there's a common
one in sys/conf/NOTES.

Prefer the le device driver for Lance (AMD7990 et al) hardware over the
older, and less capable lnc driver.

Reviewed by: imp

pcic is no more on i386 port, so remove it from the hints.

Fix booting with ps2 keyboards.

Hints for the le driver are no longer necessary here.

Noticed by: ru

Add "disabled" hints to all of the uncommon ISA devices that are in
GENERIC. Each device can be re-enabled at startup time by unsetting the
disabled hint in the loader.

Requested by: mdodd
Approved by: re
Prodded by: rwatson

No need for pmtimer hint anymore.

Remove 'at' hints for npx and apm as both drivers have identify routines
that add an instance of themselves. The npx(4) driver doesn't even check
the npx 'port' hint but hardcodes IO_NPX instead. The npx(4) driver also
will use isa IRQ 13 (on x86, 8 on pc98) by default if no 'irq' hint is
specified, so we don't need that hint either.

Remove pcm hints here now that it's gone from GENERIC.

Reminded-by: bde

Create a pmtimer device instance for GENERIC and NEWCARD kernels by default.

Submitted by: Masayuki FUKUI <fukui@sonic.nm.fujitsu.co.jp>

In the year 2000, I think it's perfectly reasonable to include audio
support by default in GENERIC.

Revert two experimental changes which escaped from my devel machine.

Convert all users of fldoff() to offsetof(). fldoff() is bad
because it only takes a struct tag which makes it impossible to
use unions, typedefs etc.

Define __offsetof() in <machine/ansi.h>

Define offsetof() in terms of __offsetof() in <stddef.h> and <sys/types.h>

Remove myriad of local offsetof() definitions.

Remove includes of <stddef.h> in kernel code.

NB: Kernelcode should *never* include from /usr/include !

Make <sys/queue.h> include <machine/ansi.h> to avoid polluting the API.

Deprecate <struct.h> with a warning. The warning turns into an error on
01-12-2000 and the file gets removed entirely on 01-01-2001.

Paritials reviews by: various.
Significant brucifications by: bde

Default the pcic to polling. Some laptops need to have polling mode
due to a paucity of IRQs. I have some reservations about this, so I'm
not going to MFC this just yet. I'm doing this to see how many
problems it causes so we can do this in 4.2. I've been seeing hangs
on my laptop from time to time, but sometimes it was not in polling
mode, other tmies it was. Don't know if this is one problem or more
than one.

Requested by: Sean O Connell

s/iomem/maddr/ - these were generated from an older verion of the
gethints script. :-(

Borrow phk's axe and apply the next stage of config(8)'s evolution.

Use Warner Losh's "hint" driver to decode ascii strings to fill the
resource table at boot time.

config(8) no longer generates an ioconf.c table - ie: the configuration
no longer has to be compiled into the kernel. You can reconfigure your
isa devices with the likes of this at loader(8) time:
set hint.ed.0.port=0x320

userconfig will be rewritten to use this style interface one day and will
move to /boot/userconfig.4th or something like that.

It is still possible to statically compile in a set of hints into a kernel
if you do not wish to use loader(8). See the "hints" directive in GENERIC
as an example.

All device wiring has been moved out of config(8). There is a set of
helper scripts (see i386/conf/gethints.pl, and the same for alpha and pc98)
that extract the 'at isa? port foo irq bar' from the old files and produces
a hints file. If you install this file as /boot/device.hints (and update
/boot/defaults/loader.conf - You can do a build/install in sys/boot) then
loader will load it automatically for you. You can also compile in the
hints directly with: hints "device.hints" as well.

There are a few things that I'm not too happy with yet. Under this scheme,
things like LINT would no longer be useful as "documentation" of settings.
I have renamed this file to 'NOTES' and stored the example hints strings
in it. However... this is not something that config(8) understands, so
there is a script that extracts the build-specific data from the
documentation file (NOTES) to produce a LINT that can be config'ed and
built. A stack of man4 pages will need updating. :-/

Also, since there is no longer a difference between 'device' and
'pseudo-device' I collapsed the two together, and the resulting 'device'
takes a 'number of units' for devices that still have it statically
allocated. eg: 'device fe 4' will compile the fe driver with NFE set
to 4. You can then set hints for 4 units (0 - 3). Also note that
'device fe0' will be interpreted as "zero units of 'fe'" which would be
bad, so there is a config warning for this. This is only needed for
old drivers that still have static limits on numbers of units.
All the statically limited drivers that I could find were marked.

Please exercise EXTREME CAUTION when transitioning!

Moral support by: phk, msmith, dfr, asmodai, imp, and others