Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

MFi386: Make similar changes that were made to atkbdc in r245315.

kern cons: introduce infrastructure for console grabbing by kernel

At the moment grab and ungrab methods of all console drivers are no-ops.

Current intended meaning of the calls is that the kernel takes control of
console input. In the future the semantics may be extended to mean that
the calling thread takes full ownership of the console (e.g. console
output from other threads could be suspended).

Inspired by: bde
MFC after: 2 months

Replace `inline static' by `static inline'.

If I interpret the C standard correctly, the storage specifier should be
placed before the inline keyword. While at it, replace __inline by
inline in the files affected.

Follow up to r225203 refining break-to-debugger run-time configuration
improvements:

(1) Implement new model in previously missed at91 UART driver
(2) Move BREAK_TO_DEBUGGER and ALT_BREAK_TO_DEBUGGER from opt_comconsole.h
to opt_kdb.h (spotted by np)
(3) Garbage collect now-unused opt_comconsole.h

MFC after: 3 weeks
Approved by: re (bz)

Attempt to make break-to-debugger and alternative break-to-debugger more
accessible:

(1) Always compile in support for breaking into the debugger if options
KDB is present in the kernel.

(2) Disable both by default, but allow them to be enabled via tunables
and sysctls debug.kdb.break_to_debugger and
debug.kdb.alt_break_to_debugger.

(3) options BREAK_TO_DEBUGGER and options ALT_BREAK_TO_DEBUGGER continue
to behave as before -- only now instead of compiling in
break-to-debugger support, they change the default values of the
above sysctls to enable those features by default. Current kernel
configurations should, therefore, continue to behave as expected.

(4) Migrate alternative break-to-debugger state machine logic out of
individual device drivers into centralised KDB code. This has a
number of upsides, but also one downside: it's now tricky to release
sio spin locks when entering the debugger, so we don't. However,
similar logic does not exist in other device drivers, including uart.

(5) dcons requires some special handling; unlike other console types, it
allows overriding KDB's own debugger selection, so we need a new
interface to KDB to allow that to work.

GENERIC kernels in -CURRENT will now support break-to-debugger as long as
appropriate boot/run-time options are set, which should improve the
debuggability of BETA kernels significantly.

MFC after: 3 weeks
Reviewed by: kib, nwhitehorn
Approved by: re (bz)

Restore binary compatibility for GIO_KEYMAP and PIO_KEYMAP.

Back in 2009 I changed the ABI of the GIO_KEYMAP and PIO_KEYMAP ioctls
to support wide characters. I created a patch to add ABI compatibility
for the old calls, but I didn't get any feedback to that.

It seems now people are upgrading from 8 to 9 they experience this
issue, so add it anyway.

Move VT switching hack for suspend/resume from bus drivers to syscons.c
using event handlers. A different version was

Submitted by: Taku YAMAMOTO (taku at tackymt dot homeip dot net)

Fix typos - remove duplicate "the".

PR: bin/154928
Submitted by: Eitan Adler <lists at eitanadler.com>
MFC after: 3 days

Based on discussions on the svn-src mailing list, rework r218195:

- entirely eliminate some calls to uio_yeild() as being unnecessary,
such as in a sysctl handler.

- move should_yield() and maybe_yield() to kern_synch.c and move the
prototypes from sys/uio.h to sys/proc.h

- add a slightly more generic kern_yield() that can replace the
functionality of uio_yield().

- replace source uses of uio_yield() with the functional equivalent,
or in some cases do not change the thread priority when switching.

- fix a logic inversion bug in vlrureclaim(), pointed out by bde@.

- instead of using the per-cpu last switched ticks, use a per thread
variable for should_yield(). With PREEMPTION, the only reasonable
use of this is to determine if a lock has been held a long time and
relinquish it. Without PREEMPTION, this is essentially the same as
the per-cpu variable.

Unify pc98 event timer code with the rest of x86.

Reviewed by: nyan@

Implement new event timers infrastructure. It provides unified APIs for
writing event timer drivers, for choosing best possible drivers by machine
independent code and for operating them to supply kernel with hardclock(),
statclock() and profclock() events in unified fashion on various hardware.

Infrastructure provides support for both per-CPU (independent for every CPU
core) and global timers in periodic and one-shot modes. MI management code
at this moment uses only periodic mode, but one-shot mode use planned for
later, as part of tickless kernel project.

For this moment infrastructure used on i386 and amd64 architectures. Other
archs are welcome to follow, while their current operation should not be
affected.

This patch updates existing drivers (i8254, RTC and LAPIC) for the new
order, and adds event timers support into the HPET driver. These drivers
have different capabilities:
LAPIC - per-CPU timer, supports periodic and one-shot operation, may
freeze in C3 state, calibrated on first use, so may be not exactly precise.
HPET - depending on hardware can work as per-CPU or global, supports
periodic and one-shot operation, usually provides several event timers.
i8254 - global, limited to periodic mode, because same hardware used also
as time counter.
RTC - global, supports only periodic mode, set of frequencies in Hz
limited by powers of 2.

Depending on hardware capabilities, drivers preferred in following orders,
either LAPIC, HPETs, i8254, RTC or HPETs, LAPIC, i8254, RTC.
User may explicitly specify wanted timers via loader tunables or sysctls:
kern.eventtimer.timer1 and kern.eventtimer.timer2.
If requested driver is unavailable or unoperational, system will try to
replace it. If no more timers available or "NONE" specified for second,
system will operate using only one timer, multiplying it's frequency by few
times and uing respective dividers to honor hz, stathz and profhz values,
set during initial setup.

Reduce diffs against syscons_isa.c. No functional changes.

- Implement MI helper functions, dividing one or two timer interrupts with
arbitrary frequencies into hardclock(), statclock() and profclock() calls.
Same code with minor variations duplicated several times over the tree for
different timer drivers and architectures.
- Switch all x86 archs to new functions, simplifying the code and removing
extra logic from timer drivers. Other archs are also welcome.

Comply with the new cyclic dtrace module variable name
(cyclic_clock_func).

Default the machdep.lapic_allclocks to be enabled in order to cope with
broken atrtc.
Now if you want more correct stats on profhz and stathz it may be
disabled by setting to 0.

Reported by: A. Akephalos <akephalos dot akephalos at gmail dot com>,
Jakub Lach <jakub_lach at mailplus dot pl>
MFC: 1 week

MFx86: the part of r204641

In order to do that cleanly, lapic_setup_clock(), on both ia32 and amd64,
now accepts as arguments the desired sources to handle, and returns the
actual ones (LAPIC_CLOCK_NONE is forbidden because otherwise there is no
meaning in calling such function).
This allows to bring out into commont x86 code the handling part for
machdep.lapic_allclocks tunable, which is retained.

- Allow clock subsystem to be compiled without the apic support [0]
- ATPIC, on pc98 is never defined somewhere, differently from i386.
Turn its compilation to be conditional as i386 does. [1]

[0] Reported by: nyan
[1] Submitted by: nyan

Handling all the three clocks (hardclock, softclock, profclock) with the
LAPIC may lead to aliasing for softclock and profclock because frequencies
are sized in order to fit mainly hardclock.
atrtc used to take care of the softclock and profclock and it does still
do, if the LAPIC can't handle the clocks properly.

Revert the change when the LAPIC started taking charge of all three of
them and let atrtc handle softclock and profclock if not explicitly
requested. Such request can be made setting != 0 the new tunable
machdep.lapic_allclocks or if the new device ATPIC is not present
within the i386 kernel config (atrtc is linked to atpic presence).

Diagnosed by: Sandvine Incorporated
Reviewed by: jhb, emaste
Sponsored by: Sandvine Incorporated
MFC: 3 weeks

Update d_mmap() to accept vm_ooffset_t and vm_memattr_t.

This replaces d_mmap() with the d_mmap2() implementation and also
changes the type of offset to vm_ooffset_t.

Purge d_mmap2().

All driver modules will need to be rebuilt since D_VERSION is also
bumped.

Reviewed by: jhb@
MFC after: Not in this lifetime...

MFi386: revision 199104

Make isa_dma functions MPSAFE by introducing its own private lock.

Allow Syscons terminal emulators to provide function key strings.

xterm and cons25 have some incompatibilities when it comes to escape
sequences for special keys, such as F1 to F12, home, end, etc. Add a new
te_fkeystr() that can be used to override the strings.

scterm-sck won't do anything with this, but scterm-teken will use
teken_get_sequences() to obtain the proper sequence.

Temporarily revert the new-bus locking for 8.0 release. It will be
reintroduced after HEAD is reopened for commits by re@.

Approved by: re (kib), attilio

Make the newbus subsystem Giant free by adding the new newbus sxlock.
The newbus lock is responsible for protecting newbus internIal structures,
device states and devclass flags. It is necessary to hold it when all
such datas are accessed. For the other operations, softc locking should
ensure enough protection to avoid races.

Newbus lock is automatically held when virtual operations on the device
and bus are invoked when loading the driver or when the suspend/resume
take place. For other 'spourious' operations trying to access/modify
the newbus topology, newbus lock needs to be automatically acquired and
dropped.

For the moment Giant is also acquired in some key point (modules subsystem)
in order to avoid problems before the 8.0 release as module handlers could
make assumptions about it. This Giant locking should go just after
the release happens.

Please keep in mind that the public interface can be expanded in order
to provide more support, if there are really necessities at some point
and also some bugs could arise as long as the patch needs a bit of
further testing.

Bump __FreeBSD_version in order to reflect the newbus lock introduction.

Reviewed by: ed, hps, jhb, imp, mav, scottl
No answer by: ariff, thompsa, yongari
Tested by: pho,
G. Trematerra <giovanni dot trematerra at gmail dot com>,
Brandon Gooch <jamesbrandongooch at gmail dot com>
Sponsored by: Yahoo! Incorporated
Approved by: re (ksmith)

Reduce diffs against i386.
Use the hardclockintr function.

Rename statclock_disable variable to atrtcclock_disable that it actually is,
and hide it inside of atrtc driver. Add new tunable hint.atrtc.0.clock
controlling it. Setting it to 0 disables using RTC clock as stat-/
profclock sources.

Teach i386 and amd64 SMP platforms to emulate stat-/profclocks using i8254
hardclock, when LAPIC and RTC clocks are disabled.

This allows to reduce global interrupt rate of idle system down to about
100 interrupts per core, permitting C3 and deeper C-states provide maximum
CPU power efficiency.

MFi386: revision 191745

Add support for using i8254 and rtc timers as event sources for i386 SMP
system. Redistribute hard-/stat-/profclock events to other CPUs using IPI.

Migrate the olpt(4) driver to si_drv1 instead of using dev2unit().

Approved by: nyan

Make a 1:1 mapping between syscons stats and terminal emulators.

After I imported libteken into the source tree, I noticed syscons didn't
store the cursor position inside the terminal emulator, but inside the
virtual terminal stat. This is not very useful, because when you
implement more complex forms of line wrapping, you need to keep track of
more state than just the cursor position.

Because the kernel messages didn't share the same terminal emulator as
ttyv0, this caused a lot of strange things, like kernel messages being
misplaced and a missing notification to resize the terminal emulator for
kernel messages never to be resized when using vidcontrol.

This patch just removes kernel_console_ts and adds a special parameter
to te_puts to determine whether messages should be printed using regular
colors or the ones for kernel messages.

Reported by: ache
Tested by: nyan, garga (older version)

MFi386: part of 189421

- If there are no syscons hints at all, assume there is a single sc0 device
anyway. The console probe will still fail unless a VGA adapter is found.

Replace syscons terminal renderer by a new renderer that uses libteken.

Some time ago I started working on a library called libteken, which is
terminal emulator. It does not buffer any screen contents, but only
keeps terminal state, such as cursor position, attributes, etc. It
should implement all escape sequences that are implemented by the
cons25 terminal emulator, but also a fair amount of sequences that are
present in VT100 and xterm.

A lot of random notes, which could be of interest to users/developers:

- Even though I'm leaving the terminal type set to `cons25', users can
do experiments with placing `xterm-color' in /etc/ttys. Because we
only implement a subset of features of xterm, this may cause
artifacts. We should consider extending libteken, because in my
opinion xterm is the way to go. Some missing features:

- Keypad application mode (DECKPAM)
- Character sets (SCS)

- libteken is filled with a fair amount of assertions, but unfortunately
we cannot go into the debugger anymore if we fail them. I've done
development of this library almost entirely in userspace. In
sys/dev/syscons/teken there are two applications that can be helpful
when debugging the code:

- teken_demo: a terminal emulator that can be started from a regular
xterm that emulates a terminal using libteken. This application can
be very useful to debug any rendering issues.

- teken_stress: a stress testing application that emulates random
terminal output. libteken has literally survived multiple terabytes
of random input.

- libteken also includes support for UTF-8, but unfortunately our input
layer and font renderer don't support this. If users want to
experiment with UTF-8 support, they can enable `TEKEN_UTF8' in
teken.h. If you recompile your kernel or the teken_demo application,
you can hold some nice experiments.

- I've left PC98 the way it is right now. The PC98 platform has a custom
syscons renderer, which supports some form of localised input. Maybe
we should port PC98 to libteken by the time syscons supports UTF-8?

- I've removed the `dumb' terminal emulator. It has been broken for
years. It hasn't survived the `struct proc' -> `struct thread'
conversion.

- To prevent confusion among people that want to hack on libteken:
unlike syscons, the state machines that parse the escape sequences are
machine generated. This means that if you want to add new escape
sequences, you have to add an entry to the `sequences' file. This will
cause new entries to be added to `teken_state.h'.

- Any rendering artifacts that didn't occur prior to this commit are by
accident. They should be reported to me, so I can fix them.

Discussed on: current@, hackers@
Discussed with: philip (at 25C3)

Replace all calls to minor() with dev2unit().

After I removed all the unit2minor()/minor2unit() calls from the kernel
yesterday, I realised calling minor() everywhere is quite confusing.
Character devices now only have the ability to store a unit number, not
a minor number. Remove the confusion by using dev2unit() everywhere.

This commit could also be considered as a bug fix. A lot of drivers call
minor(), while they should actually be calling dev2unit(). In -CURRENT
this isn't a problem, but it turns out we never had any problem reports
related to that issue in the past. I suspect not many people connect
more than 256 pieces of the same hardware.

Reviewed by: kib

- Cleanup i8251 related defines.
- Move i8255 related defines into a separate file.

Integrate the new MPSAFE TTY layer to the FreeBSD operating system.

The last half year I've been working on a replacement TTY layer for the
FreeBSD kernel. The new TTY layer was designed to improve the following:

- Improved driver model:

The old TTY layer has a driver model that is not abstract enough to
make it friendly to use. A good example is the output path, where the
device drivers directly access the output buffers. This means that an
in-kernel PPP implementation must always convert network buffers into
TTY buffers.

If a PPP implementation would be built on top of the new TTY layer
(still needs a hooks layer, though), it would allow the PPP
implementation to directly hand the data to the TTY driver.

- Improved hotplugging:

With the old TTY layer, it isn't entirely safe to destroy TTY's from
the system. This implementation has a two-step destructing design,
where the driver first abandons the TTY. After all threads have left
the TTY, the TTY layer calls a routine in the driver, which can be
used to free resources (unit numbers, etc).

The pts(4) driver also implements this feature, which means
posix_openpt() will now return PTY's that are created on the fly.

- Improved performance:

One of the major improvements is the per-TTY mutex, which is expected
to improve scalability when compared to the old Giant locking.
Another change is the unbuffered copying to userspace, which is both
used on TTY device nodes and PTY masters.

Upgrading should be quite straightforward. Unlike previous versions,
existing kernel configuration files do not need to be changed, except
when they reference device drivers that are listed in UPDATING.

Obtained from: //depot/projects/mpsafetty/...
Approved by: philip (ex-mentor)
Discussed: on the lists, at BSDCan, at the DevSummit
Sponsored by: Snow B.V., the Netherlands
dcons(4) fixed by: kan

MFi386: revision 1.249

Add a cyclic hook for DTrace.

Expand kdb_alt_break a little, most commonly used with the option
ALT_BREAK_TO_DEBUGGER. In addition to "Enter ~ ctrl-B" (to enter the
debugger), there is now "Enter ~ ctrl-P" (force panic) and
"Enter ~ ctrl-R" (request clean reboot, ala ctrl-alt-del on syscons).

We've used variations of this at work. The force panic sequence is
best used with KDB_UNATTENDED for when you just want it to dump and
get on with it.

The reboot request is a safer way of getting into single user than
a power cycle. eg: you've hosed the ability to log in (pam, rtld, etc).
It gives init the reboot signal, which causes an orderly reboot.

I've taken my best guess at what the !x86 and non-sio code changes
should be.

This also makes sio release its spinlock before calling KDB/DDB.

Now that all platforms use genclock, shuffle things around slightly
for better structure.

Much of this is related to <sys/clock.h>, which should really have
been called <sys/calendar.h>, but unless and until we need the name,
the repocopy can wait.

In general the kernel does not know about minutes, hours, days,
timezones, daylight savings time, leap-years and such. All that
is theoretically a matter for userland only.

Parts of kernel code does however care: badly designed filesystems
store timestamps in local time and RTC chips almost universally
track time in a YY-MM-DD HH:MM:SS format, and sometimes in local
timezone instead of UTC. For this we have <sys/clock.h>

<sys/time.h> on the other hand, deals with time_t, timeval, timespec
and so on. These know only seconds and fractions thereof.

Move inittodr() and resettodr() prototypes to <sys/time.h>.
Retain the names as it is one of the few surviving PDP/VAX references.

Move startrtclock() to <machine/clock.h> on relevant platforms, it
is a MD call between machdep.c/clock.c. Remove references to it
elsewhere.

Remove a lot of unnecessary <sys/clock.h> includes.

Move the machdep.disable_rtc_set sysctl to subr_rtc.c where it belongs.
XXX: should be kern.disable_rtc_set really, it's not MD.

MFi386: Merge yet another the RTC related work.

Split the pcrtc driver into pcrtc.c which is repo-copied from clock.c

MFi386: RTC related cleanups.

- Use generic RTC handling code.
- Make clock_if.m and subr_rtc.c standard.
- Nuke MD inittodr(), resettodr() functions.
- Add new "pcrtc" device driver.
- Add hints for "pcrtc" driver.

Always set the bell_pitch to 800. This catch up with the sysbeep() argument
changing.

Back in the good old days, PC's had random pieces of rock for
frequency generation and what frequency the generated was anyones
guess.

In general the 32.768kHz RTC clock x-tal was the best, because that
was a regular wrist-watch Xtal, whereas the X-tal generating the
ISA bus frequency was much lower quality, often costing as much as
several cents a piece, so it made good sense to check the ISA bus
frequency against the RTC clock.

The other relevant property of those machines, is that they
typically had no more than 16MB RAM.

These days, CPU chips croak if their clocks are not tightly within
specs and all necessary frequencies are derived from the master
crystal by means if PLL's.

Considering that it takes on average 1.5 second to calibrate the
frequency of the i8254 counter, that more likely than not, we will
not actually use the result of the calibration, and as the final
clincher, we seldom use the i8254 for anything besides BEL in
syscons anyway, it has become time to drop the calibration code.

If you need to tell the system what frequency your i8254 runs,
you can do so from the loader using hw.i8254.freq or using the
sysctl kern.timecounter.tc.i8254.frequency.

Further cleanup of sound generation in syscons:

The timer_spkr_*() functions take care of the enabling/disabling
of the speaker.

Test on the existence of timer_spkr_*() functions, rather than
architectures.

The "free-lance" timer in the i8254 is only used for the speaker
these days, so de-generalize the acquire_timer/release_timer api
to just deal with speakers.

The new (optional) MD functions are:
timer_spkr_acquire()
timer_spkr_release()
and
timer_spkr_setfreq()

the last of which configures the timer to generate a tone of a given
frequency, in Hz instead of 1/1193182th of seconds.

Drop entirely timer2 on pc98, it is not used anywhere at all.

Move sysbeep() to kern/tty_cons.c and use the timer_spkr*() if
they exist, and do nothing otherwise.

Remove prototypes and empty acquire-/release-timer() and sysbeep()
functions from the non-beeping archs.

This eliminate the need for the speaker driver to know about
i8254frequency at all. In theory this makes the speaker driver MI,
contingent on the timer_spkr_*() functions existing but the driver
does not know this yet and still attaches to the ISA bus.

Syscons is more tricky, in one function, sc_tone(), it knows the hz
and things are just fine.

In the other function, sc_bell() it seems to get the period from
the KDMKTONE ioctl in terms if 1/1193182th second, so we hardcode
the 1193182 and leave it at that. It's probably not important.

Change a few other sysbeep() uses which obviously knew that the
argument was in terms of i8254 frequency, and leave alone those
that look like people thought sysbeep() took frequency in hertz.

This eliminates the knowledge of i8254_freq from all but the actual
clock.c code and the prof_machdep.c on amd64 and i386, where I think
it would be smart to ask for help from the timecounters anyway [TBD].

Rename timer0_max_count to i8254_max_count.
Rename timer0_real_max_count to i8254_real_max_count and make it static.
Rename timer_freq to i8254_freq and make it a loader tunable.

The RTC related pscnt and psdiv variables have no business being public.

Merged from sys/dev/sio/sio.c revision 1.472

Stop serial console and gdb serial port from getting all screwed up.

Use kbdd_* macros.

Replace explicit calls to video methods with their respective variants
implemented with macros. This patch improves code readability. Reasoning
behind vidd_* is a sort of "video discipline".

List of macros is supposed to be complete--all methods of video_switch
ought to have their respective macros from now on.

Functionally, this code should be no-op. My intention is to leave current
behaviour of touched code as is.

No objections: rwatson
Silence on: freebsd-current@
Approved by: cognet

Add a new 'why' argument to kdb_enter(), and a set of constants to use
for that argument. This will allow DDB to detect the broad category of
reason why the debugger has been entered, which it can use for the
purposes of deciding which DDB script to run.

Assign approximate why values to all current consumers of the
kdb_enter() interface.

Spelling fix for interupt -> interrupt

Mfi386 revision 1.239 of src/sys/i386/isa/clock.c. Seemingly some
pc98 motherboards do not provide us with the correct day of week
either. Ignore the day of week when setting the clock here too.

Approved by: re (bmah)
Requested from: nyan
MFC after: 3 weeks

If clock_ct_to_ts fails to convert time time from the real time clock,
print a one line error message. Add some comments on not being able to
trust the day of week field (I'll act on these comments in a follow up
commit).

Approved by: re
MFC after: 3 weeks

In the function pc98_check_if_type for the non-8251 case
make sure we initialize fileds in the iod that otherwise
would have been initialized.

Reviewed by: nate, ken, warner
Approved by: re (ken)

Despite several examples in the kernel, the third argument of
sysctl_handle_int is not sizeof the int type you want to export.
The type must always be an int or an unsigned int.

Remove the instances where a sizeof(variable) is passed to stop
people accidently cut and pasting these examples.

In a few places this was sysctl_handle_int was being used on 64 bit
types, which would truncate the value to be exported. In these
cases use sysctl_handle_quad to export them and change the format
to Q so that sysctl(1) can still print them.

Don't call bus_deactivate_resource() explicitly before calling
bus_release_resource(). This is needed for pc98 by upcoming nexus related
change.

- Use mtx_{lock,unlock}_spin rather than {disable,enable}_intr.
- Remove unnecessary findcpuspeed() function.
- Initialize the timer_freq in i8254_init().
- Fix inittodr() and resettodr(). These are broken by rev.1.154.

Reduce diffs with i386.

Use pause() rather than tsleep() on explicit global dummy variables.

Garbage collect a reference to INTR_FAST.

o break newbus api: add a new argument of type driver_filter_t to
bus_setup_intr()

o add an int return code to all fast handlers

o retire INTR_FAST/IH_FAST

For more info: http://docs.freebsd.org/cgi/getmsg.cgi?fetch=465712+0+current/freebsd-current

Approved by: re (implicit?)

o break newbus api: add a new argument of type driver_filter_t to
bus_setup_intr()

o add an int return code to all fast handlers

o retire INTR_FAST/IH_FAST

For more info: http://docs.freebsd.org/cgi/getmsg.cgi?fetch=465712+0+current/freebsd-current

Reviewed by: many
Approved by: re@

Oops, pc98 is independent of i386 for clock.c and machdep.c but not
for clock.h, so changing th i386 clock.h broke it. MFi386 (not tested):

Cleaned up declaration and initialization of clock_lock. It is only
used by clock code, so don't export it to the world for machdep.c to
initialize. There is a minor problem initializing it before it is
used, since although clock initialization is split up so that parts
of it can be done early, the first part was never done early enough
to actually work. Split it up a bit more and do the first part as
late as possible to document the necessary order. The functions that
implement the split are still bogusly exported.

Cleaned up initialization of the i8254 clock hardware using the new
split. Actually initialize it early enough, and don't work around it
not being initialized in DELAY() when DELAY() is called early for
initialization of some console drivers.

This unfortunately moves a little more code before the early debugger
breakpoint so that it is harder to debug. The ordering of console and
related initialization is delicate because we want to do as little as
possible before the breakpoint, but must initialize a console.

Sweep kernel replacing suser(9) calls with priv(9) calls, assigning
specific privilege names to a broad range of privileges. These may
require some future tweaking.

Sponsored by: nCircle Network Security, Inc.
Obtained from: TrustedBSD Project
Discussed on: arch@
Reviewed (at least in part) by: mlaier, jmg, pjd, bde, ceri,
Alex Lyashkov <umka at sevcity dot net>,
Skip Ford <skip dot ford at verizon dot net>,
Antoine Brodin <antoine dot brodin at laposte dot net>

Use Calendrical Calculations from subr_clock.c instead of home copy&pasted.

Second part of a little cleanup in the calendar/timezone/RTC handling.

Split subr_clock.c in two parts (by repo-copy):
subr_clock.c contains generic RTC and calendaric stuff. etc.
subr_rtc.c contains the newbus'ified RTC interface.

Centralize the machdep.{adjkerntz,disable_rtc_set,wall_cmos_clock}
sysctls and associated variables into subr_clock.c. They are
not machine dependent and we have generic code that relies on being
present so they are not even optional.

First part of a little cleanup in the calendar/timezone/RTC handling.

Move relevant variables to <sys/clock.h> and fix #includes as necessary.

Use libkern's much more time- & spamce-efficient BCD routines.

Fix our ioctl(2) implementation when the argument is "int". New
ioctls passing integer arguments should use the _IOWINT() macro.
This fixes a lot of ioctl's not working on sparc64, most notable
being keyboard/syscons ioctls.

Full ABI compatibility is provided, with the bonus of fixing the
handling of old ioctls on sparc64.

Reviewed by: bde (with contributions)
Tested by: emax, marius
MFC after: 1 week

Fix style nits. No md5 changes in .o's. ;-)

typo.

Aling to new console and gdb_port semantics

Since DELAY() was moved, most <machine/clock.h> #includes have been
unnecessary.

Remove unneeded include.

- Move defines for PC-98 machine type from pc98/cbus/cbus.h into
pc98/pc98/pc98_machdep.h.
- Fix PC98_SYSTEM_PARAMETER_SIZE.
- Remove unused defines.

o Move ISA specific code from ppc.c to ppc_isa.c -- a bus front-
end for isa(4).
o Add a seperate bus frontend for acpi(4) and allow ISA DMA for
it when ISA is configured in the kernel. This allows acpi(4)
attachments in non-ISA configurations, as is possible for ia64.
o Add a seperate bus frontend for pci(4) and detect known single
port parallel cards.
o Merge PC98 specific changes under pc98/cbus into the MI driver.
The changes are minor enough for conditional compilation and
in this form invites better abstraction.
o Have ppc(4) usabled on all platforms, now that ISA specifics
are untangled enough.

- Use bus_setup_intr() and bus_teardown_intr() to register device driver
interrupt handlers rather than BUS_SETUP_INTR() and BUS_TEARDOWN_INTR().
Uses of the BUS_*() versions in the implementation of foo_intr methods
in bus drivers were not changed. Mostly this just means that some
drivers might start printing diagnostic messages like [FAST] when
appropriate as well as honoring mpsafenet=0.
- Fix two more of the ppbus drivers' identify routines to function
correctly in the mythical case of a machine with more than one ppbus.

Fix build error.

Tweak how the MD code calls the fooclock() methods some. Instead of
passing a pointer to an opaque clockframe structure and requiring the
MD code to supply CLKF_FOO() macros to extract needed values out of the
opaque structure, just pass the needed values directly. In practice this
means passing the pair (usermode, pc) to hardclock() and profclock() and
passing the boolean (usermode) to hardclock_cpu() and hardclock_process().
Other details:
- Axe clockframe and CLKF_FOO() macros on all architectures. Basically,
all the archs were taking a trapframe and converting it into a clockframe
one way or another. Now they can just extract the PC and usermode values
directly out of the trapframe and pass it to fooclock().
- Renamed hardclock_process() to hardclock_cpu() as the latter is more
accurate.
- On Alpha, we now run profclock() at hz (profhz == hz) rather than at
the slower stathz.
- On Alpha, for the TurboLaser machines that don't have an 8254
timecounter, call hardclock() directly. This removes an extra
conditional check from every clock interrupt on Alpha on the BSP.
There is probably room for even further pruning here by changing Alpha
to use the simplified timecounter we use on x86 with the lapic timer
since we don't get interrupts from the 8254 on Alpha anyway.
- On x86, clkintr() shouldn't ever be called now unless using_lapic_timer
is false, so add a KASSERT() to that affect and remove a condition
to slightly optimize the non-lapic case.
- Change prototypeof arm_handler_execute() so that it's first arg is a
trapframe pointer rather than a void pointer for clarity.
- Use KCOUNT macro in profclock() to lookup the kernel profiling bucket.

Tested on: alpha, amd64, arm, i386, ia64, sparc64
Reviewed by: bde (mostly)

Merged from sys/dev/sio/sio.c revision 1.463.

cpp(1) only understand integer arithmetical expressions, so
_MACHINE == i386 test always succeeds, even on non-i386 (both
sides of expressions become 0). Remove the comment since
_MACHINE and _MACHINE_ARCH are going away.

Fix -Wundef warnings from compiling GENERIC and LINT kernels of
all architectures.

Fix -Wundef warnings found when compiling i386 LINT, GENERIC and
custom kernels.

Catch up with new interrupt handling code.

Eliminate two unused arguments to ttycreate().

Use 'PC Card'

Remove EPSON PC-386 note A/W/AE/WR support.

Remove EPSON_NRDISK support.

Fixup some more fallout from the lapic/i8254 changes:
- Make sure timer0_max_count is set to a correct value in the lapic case.
- Revert i8254_restore() to explicitly reprogram timer 0 rather than
calling set_timer_freq() to do it. set_timer_freq() only reprograms
the counter if the max count changes which it never does on resume. This
unbreaks suspend/resume for several people.

Tested by: marks, others
Reviewed by: bde
MFC after: 3 days

Remove a || 1 that crept into the i8254 commit and was subsequently
copied and pasted. I had actually tested without this change in my
trees as had the other testers.

Reported by: bde, Rostislav Krasny rosti dot bsd at gmail dot com
Approved by: re (scottl)
Pointy hat to: jhb

MFi386: r1.221 (Use a simpler implementation for the i8254 timecounter).

Approved by: re (scottl)

Sync with syscons update (Add new member to struct sc_rndr_sw).

Fix my copyright.

- Move bus dependent defines to {isa,cbus}_dmareg.h.
- Use isa/isareg.h rather than <arch>/isa/isa.h.

Tested on: i386, pc98

- Move timerreg.h to <arch>/include and split i8253 specific defines into
i8253reg.h, and add some defines to control a speaker.
- Move PPI related defines from i386/isa/spkr.c into ppireg.h and use them.
- Move IO_{PPI,TIMER} defines into ppireg.h and timerreg.h respectively.
- Use isa/isareg.h rather than <arch>/isa/isa.h.

Tested on: i386, pc98

Move the pc98 keymap define into pckbdtables.h because it should be used
only on the pckbd driver.

- Move the NPX_DEBUG option to options.{i386,pc98} and use opt_npx.h.
- Move npx related defines to {i386,pc98}/include/npx.h to remove #include
{isa,cbus}.h.

- Move lptreg.h into pc98/cbus and rename to olptreg.h.
- Remove ifdef pc98.

Change a directory layout for pc98.
- Move MD files into <arch>/<arch>.
- Move bus dependent files into <arch>/<bus>.
Rename some files to more suitable names.

Repo-copied by: peter
Discussed with: imp

- Remove ifdef PC98.
- Reduce diffs from i386.

Merge from i386:
- Add a i8254_pending variable to save some indirections in clkintr().
- Don't bother setting up an IRQ0 handler if we are using the lapic timer.

Define IRQ_NPX for the irq used for the npx. Define macro for a full
reset of of npx, as appropriate for the platform.

MFi386: revision 1.217.

- Remove the BURN_BRIDGES marked support for hooking into the ISA timer 0
interrupt.
- Remove the timer_func variable as it now has a static value of
hardclock() and is only used in one place.

Axe borrowed from: phk

Use dynamic major number allocation.

Merged from sys/dev/sio/sio.c revision 1.458.

Fix pc98 compile: merge in changes to use the local APIC timer. Also, add
missing initialization of i8254_intsrc while I am here.

Remove unused defines.

Add missing isa_dmatc() function.

This may or may not be correct, Only the pcii driver would notice and
it doesn't support PC98 yet.

Merged from sys/dev/sio/sio.c revision 1.457.

In my last commit, I'd assumed that LINE30 was always defined. It
turns out that LINE30_ROW was always defined, not LINE30. I confused
this for LINE30 and did the unifdef -DLINE30 using that mistaken
belief. This corrects that problem.

Submitted by: nyan-san

LINE30 is always defined now, so unifdef -DLINE30 for clarity.

Merge module.h into 30line.h and remove it. It lacked a
copyright/license header and was only used by 30line.h. It appears
that the copyright/license in 30line.h covers the old contents
module.h anyway, so this simplifies things a little while cleaning up
one obscure potential license confusion...

Revired by: nyan-san

/* -> /*- for license, minor formatting changes

Fix comment.

Add FL_MFM flag to the fd_native_types structure.

Submitted by: Watanabe Kazuhiro <CQG00620@nifty.ne.jp>

Use bioq_takefirst()

Merged from sys/dev/sio/sio.c (Use generic tty code).

Remove unused variable.

Remove local hacks to set flags now that the device probe does this for us.
Tested on every device except sio_pci and the pc98 fd.c. Perhaps something
similar should be done for the "disabled" hints also.

MFC after: 2 weeks

Use generic tty code instead of local stuff.

NB: device names are now consistent: {cua,tty}d$(port)[.lock,.init]

Add more PnP serial cards support.

PR: kern/72226
Submitted by: Hirokazu WATANABE <wnabe@par.odn.ne.jp>

Merged from sys/dev/sio/sio.c: more tty related changes.

Use tty->t_sc, ttyalloc() and lock/init termios from struct tty.

Include <sys/malloc.h> to satisfy new isa_dma stuff.

Add new a function isa_dma_init() which returns an errno when it fails
and which takes a M_WAITOK/M_NOWAIT flag argument.

Add compatibility isa_dmainit() macro which whines loudly if
isa_dma_init() fails.

Problem uncovered by: tegge

Merged from sys/dev/fdc/fdc.c revision 1.283.

Merged from sys/dev/sio/sio.c revision 1.450.

Merged from the following changes.
- sys/dev/fdc/fdc.c revision 1.281
- sys/dev/fdc/fdcvar.h revision 1.3
- sys/dev/fdc/fdc_isa.c revision 1.7

Preparation commit for the tty cleanups that will follow in the near
future:

rename ttyopen() -> tty_open() and ttyclose() -> tty_close().

We need the ttyopen() and ttyclose() for the new generic cdevsw
functions for tty devices in order to have consistent naming.

Move the fdc_alloc_resources function into the bus front end.

Merged from recent fdc driver changes.
Make a separate function to check FDD type.

MFi386: revision 1.213.
Fix miss merging in previous change.

Introduce ttygone() which indicates that the hardware is detached.

Move dtrwait logic to the generic TTY level.

MFi386: revision 1.212.

Update for the KDB framework. Sanitize the alpha console code now that
it's in the way even more. Basicly: remove all alpha specific console
support from gfb(4), sio(4) and syscons(4). Rewrite the alpha console
initialization to be identical to all other platforms. In a nutshell:
call cninit().
The platform specific code now only sets or clears RB_SERIAL and thus
automaticly causes the right console to be selected.

sio.c:
o Replace the remote GDB hacks and use the GDB debug port interface
instead.
o Make debugging code conditional upon KDB instead of DDB.
o Call kdb_alt_break() instead of db_alt_break().
o Call kdb_enter() instead of breakpoint().
o Remove the ugly compatibility of using the console as the debug
port.

- Merged from sys/dev/fdc/fdc.c revision 1.275.
- Break out the cbus front end from fd.c.
- Remove the pccard support because it was broken.

MFi386: revision 1.16.

Remove obsolete defines.

Merged from sys/dev/sio/sio.c revision 1.446.

- Shorten the names for the TTY related swi interrupt handlers as the
'tty:' prefix is largely redundant.
- Fix the priority of the low-priority TTY SWIs that are hung off of the
softclock thread.

Submitted by: bde (2)

Merged from sys/dev/sio/sio.c revision 1.444.

Pick the hotchar out of the tty structure instead of caching private
copies.

No current line disciplines have a dynamically changing hotchar, and
expecting to receive anything sensible during a change in ldisc is
insane so no locking of the hotchar field is necessary.

Merged from sys/dev/sio/sio.c revision 1.442.
(Use generic support for modemcontrol and BREAK ioctls.)

Remove the TIOCDCDTIMESTAMP option.

The RFC-2783 PPS-API (<sys/timepps.h>) provides better and more
configurable service.

Merged from sys/dev/sio/sio.c revisions 1.439 and 1.440.

Do the dreaded s/dev_t/struct cdev */
Bump __FreeBSD_version accordingly.

Include vm/vm_param.h to pull in KERNBASE now. This should fix the
pc98 tinderbox breakage.

Deorbit COMPAT_SUNOS.

We inherited this from the sparc32 port of BSD4.4-Lite1. We have neither
a sparc32 port nor a SunOS4.x compatibility desire these days.

Add missing <sys/module.h> includes.

Centralize the line discipline optimization determination in a function
called ttyldoptim().

Use this function from all the relevant drivers.

I belive no drivers finger linesw[] directly anymore, paving the way for
locking and refcounting.

Manual edits to change linesw[]-frobbing to ttyld_*() calls.

Machine generated patch which changes linedisc calls from accessing
linesw[] directly to using the ttyld...() functions

The ttyld...() functions ar inline so there is no performance hit.

Add missing <sys/module.h> #includes

Make the remaining serial drivers call ttyioctl() rather than calling
the linedisc directly.

Add missing <sys/module.h> includes currently relying on nested include
in <sys/kernel.h>

There is no need to explicitly call the stop function. In all likelyhood
->l_close() did it and ttyclose certainly will.

There is no need to explicitly call ttwakeup() and ttwwakeup() after
ttyclose() has been called. It's already been done once by ttyclose,
and probably once by the line-discipline too.

ttyclose() increments t_gen. Remove redundant increments in drivers.

Merged from sys/dev/fdc/fdc.c revision 1.272.

Mereged from sys/dev/sio/sio.c revision 1.429.

- Remove obsolete examples.
- Add a comment about meaning of flags.
- Disable unused defines.

Merged from sys/dev/sio/sio.c revision 1.428.

Merged from sys/isa/fd.c revision 1.270.

Remove advertising clause from University of California Regent's
license, per letter dated July 22, 1999 and email from Peter Wemm,
Alan Cox and Robert Watson.

Approved by: core, peter, alc, rwatson

Add a comment about time stamper.

Submitted by: chi@bd.mbn.or.jp (Chiharu Shibata)

- Fix PC98 supports after importing auto selection. [1]
- Fix 1.44MB floppy drive probe sequence. [2]

Submitted by: Watanabe Kazuhiro <CQG00620@nifty.ne.jp> [1]
chi@bd.mbn.or.jp (Chiharu Shibata) [2]

Convert callers to the new bus_alloc_resource_any(9) API.

Submitted by: Mark Santcroos <marks@ripe.net>
Reviewed by: imp, dfr, bde

including isa_device.h was historical in this file, remove it

Remove '#include <machine/bus_pio.h>'. This is meaningless.

Remove unused FDNUMTOUNIT() macro

Merged from sys/isa/fd.c revision 1.266.

Device megapatch 4/6:

Introduce d_version field in struct cdevsw, this must always be
initialized to D_VERSION.

Flip sense of D_NOGIANT flag to D_NEEDGIANT, this involves removing
four D_NOGIANT flags and adding 145 D_NEEDGIANT flags.

Device megapatch 3/6:

Add missing D_TTY flags to various drivers.

Complete asserts that dev_t's passed to ttyread(), ttywrite(),
ttypoll() and ttykqwrite() have (d_flags & D_TTY) and a struct tty
pointer.

Make ttyread(), ttywrite(), ttypoll() and ttykqwrite() the default
cdevsw methods for D_TTY drivers and remove the explicit initializations
in various drivers cdevsw structures.

Device megapatch 1/6:

Free approx 86 major numbers with a mostly automatically generated patch.

A number of strategic drivers have been left behind by caution, and a few
because they still (ab)use their major number.

Merged from sys/dev/sio/sio.c revision 1.418.

Add detach method.

Merged from sys/dev/sio/sio.c revision 1.417.

Merged from sys/dev/sio/sio.c revisions 1.415 and 1.416.

Approved by: nyan
(Blanket approval for simple changes in sio.)

MFi386: revision 1.206

Split pc98 support into pc98/pc98/nmi.c.

Merged from sys/isa/syscons_isa.c revision 1.24.

Eliminate use bio_blkno.

Merged from sys/dev/sio/sio.c revisions from 1.405 to 1.414.

MFi386: revision 1.205

OK, I messed up /dev/console with what I had hoped would be compat
code. Convert remaining console drivers and hope for the best.

Typo in last commit: missing ')'

Change fb_attach() and fb_detach() to take a integer unit number rather
than a dev_t.

All of the dev_t's passed were bogusly created with makedev()

Merged from sys/isa/fd.c revisions 1.259 and 1.260.

Merged from sys/isa/fd.c revision 1.258.

MFi386: revision 1.204.

Merged from sys/isa/fd.c revisions 1.252, 1.253, 1.254, 1.255 and 1.257.

Merged from sys/dev/sio/sio.c revisions 1.403 and 1.404.

MFi386: revisions 1.202 and 1.203.

bandaide to make this build again

MFi386: revision 1.201.

Merged from sys/dev/sio/sio.c revision 1.400.

Merged from sys/dev/ppc/ppc.c revision 1.42.

Supported the gdc_clear function.

Submitted by: chi@bd.mbn.or.jp (Chiharu Shibata)

- Use the new resource_disabled() helper function to see if devices are
disabled.
- Change the apm driver to match the acpi driver's behavior by checking to
see if the device is disabled in the identify routine instead of in the
probe routine. This way if the device is disabled it is never created.

Note that a few places (ips(4), Alpha SMP) used "disable" instead of
"disabled" for their hint names, and these hints must be changed to
"disabled". If this is a big problem, resource_disabled() can always be
changed to honor both names.

Replace evil abuse of geteblk() with malloc(9).

MFi386: revision 1.199

Merged from sys/isa/ppc.c revision 1.40.

Merged from sys/isa/fd.c revision 1.250.

Merged from sys/dev/sio/sio.c revision 1.399.

Deprecate machine/limits.h in favor of new sys/limits.h.
Change all in-tree consumers to include <sys/limits.h>

Discussed on: standards@
Partially submitted by: Craig Rodrigues <rodrigc@attbi.com>

Use bioq_flush() to drain a bio queue with a specific error code.
Retain the mistake of not updating the devstat API for now.

Spell bioq_disksort() consistently with the remaining bioq_*().

#include <geom/geom_disk.h> where this is more appropriate.

- Add vm_paddr_t, a physical address type. This is required for systems
where physical addresses larger than virtual addresses, such as i386s
with PAE.
- Use this to represent physical addresses in the MI vm system and in the
i386 pmap code. This also changes the paddr parameter to d_mmap_t.
- Fix printf formats to handle physical addresses >4G in the i386 memory
detection code, and due to kvtop returning vm_paddr_t instead of u_long.

Note that this is a name change only; vm_paddr_t is still the same as
vm_offset_t on all currently supported platforms.

Sponsored by: DARPA, Network Associates Laboratories
Discussed with: re, phk (cdevsw change)

PC98 systems don't need to worry about the MCA bus.

Including <sys/stdint.h> is (almost?) universally only to be able to use
%j in printfs, so put a newsted include in <sys/systm.h> where the printf
prototype lives and save everybody else the trouble.

Fix malloc() without legal mode flag.

Call devstat_start_transaction_bio() instead of devstat_start_transaction()

Merged from sys/dev/sio/sio.c revisions 1.387 and 1.388.

Allocate the devstat structure with devstat_new_entry().

Make nokqfilter() return the correct return value.

Ditch the D_KQFILTER flag which was used to prevent calling NULL pointers.

Gigacommit to improve device-driver source compatibility between
branches:

Initialize struct cdevsw using C99 sparse initializtion and remove
all initializations to default values.

This patch is automatically generated and has been tested by compiling
LINT with all the fields in struct cdevsw in reverse order on alpha,
sparc64 and i386.

Approved by: re(scottl)

More low-hanging fruit: kill caddr_t in calls to wakeup(9) / [mt]sleep(9).

Convert one more d_mmap_t consumer I missed in my previous commit.

Cleanup of the d_mmap_t interface.

- Get rid of the useless atop() / pmap_phys_address() detour. The
device mmap handlers must now give back the physical address
without atop()'ing it.
- Don't borrow the physical address of the mapping in the returned
int. Now we properly pass a vm_offset_t * and expect it to be
filled by the mmap handler when the mapping was successful. The
mmap handler must now return 0 when successful, any other value
is considered as an error. Previously, returning -1 was the only
way to fail. This change thus accidentally fixes some devices
which were bogusly returning errno constants which would have been
considered as addresses by the device pager.
- Garbage collect the poorly named pmap_phys_address() now that it's
no longer used.
- Convert all the d_mmap_t consumers to the new API.

I'm still not sure wheter we need a __FreeBSD_version bump for this,
since and we didn't guarantee API/ABI stability until 5.1-RELEASE.

Discussed with: alc, phk, jake
Reviewed by: peter
Compile-tested on: LINT (i386), GENERIC (alpha and sparc64)
Runtime-tested on: i386

Fix compile error with FB_INSTALL_CDEV option.

Change the console interface to pass a "struct consdev *" instead of a
dev_t to the method functions.

The dev_t can still be found at struct consdev *->cn_dev.

Add a void *cn_arg element to struct consdev which the drivers can use
for retrieving their softc.

Back out M_* changes, per decision of the TRB.

Approved by: trb

Change "dev_t gdbdev" to "void *gdb_arg", some possible paths for GDB
will not have a dev_t.

Remove #include <sys/dkstat.h>

Switch to use the TSC code i386/i386/tsc.c

Merged from sys/dev/sio/sio.c revision 1.383.

Reduce diff to i386/isa/clock.c by unifdef -DPC98

Typo in last commit

MFi386: write the correct weekday back to the RTC.

Split the global timezone structure into two integer fields to
prevent the compiler from optimizing assignments into byte-copy
operations which might make access to the individual fields non-atomic.

Use the individual fields throughout, and don't bother locking them with
Giant: it is no longer needed.

Inspired by: tjr

Split statclock into statclock and profclock, and made the method for driving
statclock based on profhz when profiling is enabled MD, since most platforms
don't use this anyway. This removes the need for statclock_process, whose
only purpose was to subdivide profhz, and gets the profiling clock running
outside of sched_lock on platforms that implement suswintr.
Also changed the interface for starting and stopping the profiling clock to
do just that, instead of changing the rate of statclock, since they can now
be separate.

Reviewed by: jhb, tmm
Tested on: i386, sparc64

MFi386: revision 1.192.

Make tsc_freq a 64bit on PC98 also.

Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.
Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT.

Merged from sys/isa/syscons_isa.c revision 1.21.

Merged from sys/isa/fd.c revision 1.244.

Merged from sys/isa/fd.c revision 1.243.

Correct typos, mostly s/ a / an / where appropriate. Some whitespace cleanup,
especially in troff files.

Fix typos, mostly s/ an / a / where appropriate and a few s/an/and/
Add FreeBSD Id tag where missing.

Merged from sys/isa/fd.c revision 1.242.

Merged from sys/isa/syscons_isa.c revision 1.20.

MFi386: revisions 1.189 and 1.190.

Merged from sys/isa/syscons_isa.c revision 1.19.

Merged from sys/dev/sio/sio.c revision 1.382.

Fixed a warning if COM_MULTIPORT option is not defined.

Submitted by: Kaho Toshikazu <kaho@elam.kais.kyoto-u.ac.jp>

Merged from sys/isa/fd.c revisions 1.224 and 1.241.

Merge the last couple of my changes to fd.c into the pc98 version.

Sponsored by: DARPA & NAI Labs

Added some buggy PC-98 PnP cards support.

Merged from sys/isa/fd.c revision 1.238.

Merged from sys/dev/sio/sio.c revisions 1.380 and 1.381.

Move the com_emr register definition to sioreg.h.

Merged from sys/dev/sio/sio.c revision 1.379.

Remove #ifdef/#endif 3 years after the stuff they protected was removed.

Spotted by: peter.

#include <sys/disk.h> to get disk_err() prototype.

Sponsored by: DARPA & NAI Labs.

Make FreeBSD "struct disklabel" agnostic, step 311 of 723:

Rename diskerr() to disk_err() for naming consistency.

Drop the by now entirely useless struct disklabel argument.

Add a flag argument for new-line termination.

Fix a couple of printf-format-casts to %j instead of %l.

Correctly print the name of all bio commands.

Move the function from subr_disklabel.c to subr_disk.c,
and from <sys/disklabel.h> to <sys/disk.h>.

Use the new disk_err() throughout, #include <sys/disk.h> as needed.

Bump __FreeBSD_version for the sake of the aac disk drivers #ifdefs.

Remove unused disklabel members of softc for aac, amr and mlx, which seem
to originally have been intended for diskerr() use, but which only rotted
and got Copy&Pasted at least two times to many.

Sponsored by: DARPA & NAI Labs.

Merged from sys/isa/fd.c revisions 1.234, 1.235 and 1.236.

Merged from sys/dev/sio/sio.c revision 1.378.

Merged from sys/isa/syscons_isa.c revision 1.18.

Replace various spelling with FALLTHROUGH which is lint()able

Merged from sys/dev/syscons/scvtb.c revision 1.9.

de-count pckbd for pc98. This file is only compiled if NPCKBD was 1,
so the conditional compile should never have been used.

Check return status from fd_in() function.

Merged from sys/dev/sio/sio.c revisions 1.376 and 1.377.

MFi386: sys/i386/isa/clock.c revision 1.187.

Backout previous change and merge from sys/dev/sio/sio.c revision 1.375.

Merged from sys/isa/fd.c revision 1.233.

Make the speed used by gdb over serial settable in the kernel configuration.

This facilitates the use in circumstances where you are using a serial
console as well. GDB doesn't support anything higher than 9600 baud (19k2
if you are lucky), but the console does.

Fix typo in the BSD copyright: s/withough/without/

Spotted and suggested by: des
MFC after: 3 weeks

Merged from sys/isa/fd.c revisions from 1.229 to 1.232.

Don't export timecounter structures under debug. with sysctl, they
contain no truly interesting data anymore.

Tidy up some loose ends.
i386/ia64/alpha - catch up to sparc64/ppc:
- replace pmap_kernel() with refs to kernel_pmap
- change kernel_pmap pointer to (&kernel_pmap_store)
(this is a speedup since ld can set these at compile/link time)
all platforms (as suggested by jake):
- gc unused pmap_reference
- gc unused pmap_destroy
- gc unused struct pmap.pm_count
(we never used pm_count - we track address space sharing at the vmspace)

Simplify the RFC2783 and PPS_SYNC timestamp collection API.

Remove the tc_update() function. Any frequency change to the
timecounter will be used starting at the next second, which is
good enough for sysctl purposes. If better adjustment is needed
the NTP PLL should be used.

Merged from sys/isa/fd.c revision 1.228.

Merged from sys/dev/sio/sio.c revisions 1.370 and 1.371.

Change callers of mtx_init() to pass in an appropriate lock type name. In
most cases NULL is passed, but in some cases such as network driver locks
(which use the MTX_NETWORK_LOCK macro) and UMA zone locks, a name is used.

Tested on: i386, alpha, sparc64

Change the suser() API to take advantage of td_ucred as well as do a
general cleanup of the API. The entire API now consists of two functions
similar to the pre-KSE API. The suser() function takes a thread pointer
as its only argument. The td_ucred member of this thread must be valid
so the only valid thread pointers are curthread and a few kernel threads
such as thread0. The suser_cred() function takes a pointer to a struct
ucred as its first argument and an integer flag as its second argument.
The flag is currently only used for the PRISON_ROOT flag.

Discussed on: smp@

Compromise for critical*()/cpu_critical*() recommit. Cleanup the interrupt
disablement assumptions in kern_fork.c by adding another API call,
cpu_critical_fork_exit(). Cleanup the td_savecrit field by moving it
from MI to MD. Temporarily move cpu_critical*() from <arch>/include/cpufunc.h
to <arch>/<arch>/critical.c (stage-2 will clean this up).

Implement interrupt deferral for i386 that allows interrupts to remain
enabled inside critical sections. This also fixes an IPI interlock bug,
and requires uses of icu_lock to be enclosed in a true interrupt disablement.

This is the stage-1 commit. Stage-2 will occur after stage-1 has stabilized,
and will move cpu_critical*() into its own header file(s) + other things.
This commit may break non-i386 architectures in trivial ways. This should
be temporary.

Reviewed by: core
Approved by: core

Push BIO_FORMAT into a local hack inside the floppy drivers where
it belongs.

Merged from sys/dev/sio/sio.c revisions 1.366 and 1.369.

Fix style.

Remove __P.

Free allocated buffer at siodetach().

MFC after: 3 days

- The pc98_ttspeedtab() function returns an error status instead of a divisor,
and sets a divisor to the third argument.
- The second argument of the pc98_set_baud_rate() function is changed from int
to u_int.

Disksort will not "munge" requests, BIO_ORDERED or not, so remove
use of BIO_ORDERED.

Cosmetic changes.

- Refine the iskanji1 function.
- Print continuous ascii characters at a time.

Submitted by: chi@bd.mbn.or.jp (Chiharu Shibata)

Fixed mouse cursor on a console.

Submitted by: chi@bd.mbn.or.jp (Chiharu Shibata)

Changed iskanji[12] to inline functions.

Merged from sys/dev/sio/{sio.c,sio_isa.c} revisions 1.363 and 1.5,
respectively.

MFi386: revision 1.180

Merged from sys/dev/sio/sio.c revisions from 1.360 to 1.362.

Merged from sys/dev/sio/sio.c revisions 1.354 and 1.358.

Change the preemption code for software interrupt thread schedules and
mutex releases to not require flags for the cases when preemption is
not allowed:

The purpose of the MTX_NOSWITCH and SWI_NOSWITCH flags is to prevent
switching to a higher priority thread on mutex releease and swi schedule,
respectively when that switch is not safe. Now that the critical section
API maintains a per-thread nesting count, the kernel can easily check
whether or not it should switch without relying on flags from the
programmer. This fixes a few bugs in that all current callers of
swi_sched() used SWI_NOSWITCH, when in fact, only the ones called from
fast interrupt handlers and the swi_sched of softclock needed this flag.
Note that to ensure that swi_sched()'s in clock and fast interrupt
handlers do not switch, these handlers have to be explicitly wrapped
in critical_enter/exit pairs. Presently, just wrapping the handlers is
sufficient, but in the future with the fully preemptive kernel, the
interrupt must be EOI'd before critical_exit() is called. (critical_exit()
can switch due to a deferred preemption in a fully preemptive kernel.)

I've tested the changes to the interrupt code on i386 and alpha. I have
not tested ia64, but the interrupt code is almost identical to the alpha
code, so I expect it will work fine. PowerPC and ARM do not yet have
interrupt code in the tree so they shouldn't be broken. Sparc64 is
broken, but that's been ok'd by jake and tmm who will be fixing the
interrupt code for sparc64 shortly.

Reviewed by: peter
Tested on: i386, alpha

MFi386: revision 1.178

cosmetic changes.

MFi386: revision 1.179

Merged from sys/isa/{fd.c,fdreg.h} revisions 1.222 and 1.15, respectively.

Fixed to draw mouse cursor. The syscons driver for PC98 uses different
attributes from i386.

Submitted by: chi@bd.mbn.or.jp (Chiharu Shibata)
MFC after: 3 days

Update to C99, s/__FUNCTION__/__func__/,
also don't use ANSI string concatenation.

Split the sio driver for pc98 into bus front end and back end.
(merged from the files in sys/dev/sio)

Removed pmc_isa_identify function. It is not needed.

Submitted by: takawata

cn_tab no longer exists, use cnadd() to add a console device. Note that
this may result in duplicate console output in some cases.

Added the pmc driver which supports power management controller of
old NEC PC-98NOTE.

Submitted by: chi@bd.mbn.or.jp (Chiharu Shibata)
MFC after: 1 week

Fix compile error of the case using `LINE30' option.

Reviewed by: nyan
MFC after: 3 days

First commit after a repo copy of isa/sio* -> dev/sio:

Move sio from isa/sio.c to dev/sio/sio.c. The next step is to break
out the front end attachments, improve support for these parts on
different busses, and maybe, if we're lucky, merging in pc98 support.
It will also be MI and live in conf/files rather than files.*.

Approved by: bde
Tested with: i386, pc98

Changed IO_NPXSIZE to 8

MFi386: sys/i386/isa/clock.c revision 1.177

Merged from sys/isa/sio.c revisions from 1.344 to 1.347

- Added #include <sys/systm.h>
- Cosmetic change

MFi386: sys/isa/fd.c revision from 1.205 to 1.219.

Allocate i/o and memory resources using gdc driver.

MFi386: sys/isa/sio.c revision 1.301, 1.336, 1.337, 1.338, 1.339 and 1.342.

Removed unnecessary PnP moden entries.

MFi386: sys/i386/isa/clock.c revision 1.175 and 1.176.

Added (commented out) ACPI attachment.

Merge sys/isa/sio.c 1.343
KSE changes

Reviewed by: julian, bde, jhb

Merge KSE changes from sys/dev/syscons/scterm-sc.c 1.17

# there are more "trivial" diffs in this file that have accumulated over time
# and I didn't try to fix those.

Reviewed by: julian, bde, jhb

KSE changes for olpt driver

Reviewed by: julian, bde, jhb

Merge from sys/isa/fd.c 1.221 and a few minor tweaks to make compile
with the post KSE world.

Reviewed by: julian, bde, jhb

Merged from sys/dev/syscons/scterm-sc.c revision 1.16.

Removed PLIP support.

Convert the olpt driver to using new-bus stuff.

Speed up console driver.

Submitted by: chi@bd.mbn.or.jp (Chiharu Shibata)

Integrate fdc.h into fd.c.

Fixed conflict with sys/dev/syscons/syscons.h.

Submitted by: yokota

- Refine pc98 supports.
- Use bus_space stuff.
- Rename FDO_* -> FDC_* (obtained from NetBSD/pc98)

Merged from the following changes.

sys/dev/syscons/scvgarndr.c revision 1.11
sys/dev/syscons/scvtb.c revision 1.8
sys/dev/syscons/syscons.c revisions 1.361, 1.363, 1.364, 1.365 and 1.366
sys/isa/atkbd_isa.c revision 1.9
sys/isa/syscons_isa.c revision 1.17

Added #include <sys/proc.h>

Submitted by: Kaho Toshikazu <kaho@elam.kais.kyoto-u.ac.jp>

With Alfred's permission, remove vm_mtx in favor of a fine-grained approach
(this commit is just the first stage). Also add various GIANT_ macros to
formalize the removal of Giant, making it easy to test in a more piecemeal
fashion. These macros will allow us to test fine-grained locks to a degree
before removing Giant, and also after, and to remove Giant in a piecemeal
fashion via sysctl's on those subsystems which the authors believe can
operate without Giant.

Fixed warning message.

Submitted by: chi@bd.mbn.or.jp (Chiharu Shibata)

Repo copy i8237.h to dev/ic so we can get rid of some of the final vestiges
of includes of i386 files from non-i386 ports.

Merged from the following changes.

sys/isa/ppc.c revisions from 1.27 to 1.34
sys/isa/ppcreg.h revisions from 1.10 to 1.15
sys/isa/isareg.h revision 1.6

Merged from sys/isa/sio.c revision 1.335.

Merged from sys/i386/isa/isa_dma.c revision 1.7.

Merged from sys/isa/syscons_isa.c revision 1.16.

Merged from sys/dev/syscons/scterm-sc.c revison 1.15.

Merged from sys/isa/fd.c revisions 1.198, 1.199, 1.200, 1.202 and 1.204.

Allocate all resources using keyboard controller.

With this commit, I hereby pronounce gensetdefs past its use-by date.

Replace the a.out emulation of 'struct linker_set' with something
a little more flexible. <sys/linker_set.h> now provides macros for
accessing elements and completely hides the implementation.

The linker_set.h macros have been on the back burner in various
forms since 1998 and has ideas and code from Mike Smith (SET_FOREACH()),
John Polstra (ELF clue) and myself (cleaned up API and the conversion
of the rest of the kernel to use it).

The macros declare a strongly typed set. They return elements with the
type that you declare the set with, rather than a generic void *.

For ELF, we use the magic ld symbols (__start_<setname> and
__stop_<setname>). Thanks to Richard Henderson <rth@redhat.com> for the
trick about how to force ld to provide them for kld's.

For a.out, we use the old linker_set struct.

NOTE: the item lists are no longer null terminated. This is why
the code impact is high in certain areas.

The runtime linker has a new method to find the linker set
boundaries depending on which backend format is in use.

linker sets are still module/kld unfriendly and should never be used
for anything that may be modular one day.

Reviewed by: eivind

Hints overhaul:
- Replace some very poorly thought out API hacks that should have been
fixed a long while ago.
- Provide some much more flexible search functions (resource_find_*())
- Use strings for storage instead of an outgrowth of the rather
inconvenient temporary ioconf table from config(). We already had a
fallback to using strings before malloc/vm was running anyway.

Move the files from i386/isa/ic/ to dev/ic/.

Nuke the various poorly maintained copies of ioctl_fd.h. The file is
not machine-dependant, thus it has been moved out (repo-copied) into
<sys/fdcio.h>.

Move out the files from src/sys/isa/ic/ to src/sys/dev/ic/, so they
can be made userland-visible as <dev/ic/...>. Also, those files are
not supposed to contain any bus-specific details at all, so placing
them under .../isa/ has been a misnomer from the beginning.

The files in src/sys/dev/ic/ have been repo-copied from their old
location (this commit is a forced null commit there to record this
message).

Remove unneeded includes of sys/ipl.h and machine/ipl.h.

Merged from sys/isa/fd.c revision 1.197.

Actually biofinish(struct bio *, struct devstat *, int error) is more general
than the bioerror().

Most of this patch is generated by scripts.

Merged from sys/isa/fd.c revision 1.193.

Merged from sys/isa/sio.c revision 1.330.

Merged from sys/isa/fd.c revision 1.195.

Merged from sys/i386/isa/clock.c revisions 1.172 and 1.173.

Merged from sys/i386/isa/clock.c revision 1.171.

Send the remains (such as I have located) of "block major numbers" to
the bit-bucket.

Supported pcmcia modem card.

Submitted by: MURAMATSU Atsushi <amura@ma3.seikyou.ne.jp>

Merged from sys/isa/sio.c revision 1.326.

Merged from sys/i386/isa/clock.c revision 1.170.

Merged from sys/i386/isa/clock.c revision 1.169.

Merged from sys/isa/sio.c revision 1.324 (sched_swi -> swi_sched).

RIP <machine/lock.h>.

Some things needed bits of <i386/include/lock.h> - cy.c now has its
own (only) copy of the COM_(UN)LOCK() macros, and IMASK_(UN)LOCK()
has been moved to <i386/include/apic.h> (AKA <machine/apic.h>).
Reviewed by: jhb

Change and clean the mutex lock interface.

mtx_enter(lock, type) becomes:

mtx_lock(lock) for sleep locks (MTX_DEF-initialized locks)
mtx_lock_spin(lock) for spin locks (MTX_SPIN-initialized)

similarily, for releasing a lock, we now have:

mtx_unlock(lock) for MTX_DEF and mtx_unlock_spin(lock) for MTX_SPIN.
We change the caller interface for the two different types of locks
because the semantics are entirely different for each case, and this
makes it explicitly clear and, at the same time, it rids us of the
extra `type' argument.

The enter->lock and exit->unlock change has been made with the idea
that we're "locking data" and not "entering locked code" in mind.

Further, remove all additional "flags" previously passed to the
lock acquire/release routines with the exception of two:

MTX_QUIET and MTX_NOSWITCH

The functionality of these flags is preserved and they can be passed
to the lock/unlock routines by calling the corresponding wrappers:

mtx_{lock, unlock}_flags(lock, flag(s)) and
mtx_{lock, unlock}_spin_flags(lock, flag(s)) for MTX_DEF and MTX_SPIN
locks, respectively.

Re-inline some lock acq/rel code; in the sleep lock case, we only
inline the _obtain_lock()s in order to ensure that the inlined code
fits into a cache line. In the spin lock case, we inline recursion and
actually only perform a function call if we need to spin. This change
has been made with the idea that we generally tend to avoid spin locks
and that also the spin locks that we do have and are heavily used
(i.e. sched_lock) do recurse, and therefore in an effort to reduce
function call overhead for some architectures (such as alpha), we
inline recursion for this case.

Create a new malloc type for the witness code and retire from using
the M_DEV type. The new type is called M_WITNESS and is only declared
if WITNESS is enabled.

Begin cleaning up some machdep/mutex.h code - specifically updated the
"optimized" inlined code in alpha/mutex.h and wrote MTX_LOCK_SPIN
and MTX_UNLOCK_SPIN asm macros for the i386/mutex.h as we presently
need those.

Finally, caught up to the interface changes in all sys code.

Contributors: jake, jhb, jasone (in no particular order)

Remove count for NSIO. The only places it was used it were incorrect.
(alpha-gdbstub.c got sync'ed up a bit with the i386 version)

Convert mca (microchannel bus support) from something that we count
(bogus) to something that we test for the presence of.

Merged from sys/isa/sio.c revision 1.320.

Remove MUTEX_DECLARE() and MTX_COLD. Instead, postpone full mutex
initialization until after malloc() is safe to call, then iterate through
all mutexes and complete their initialization.

This change is necessary in order to avoid some circular bootstrapping
dependencies.

Convert apm from a bogus 'count' into a plain option. Clean out some
other cruft from the files.alpha and files.ia64 that were related to this.

Convert more malloc+bzero to malloc+M_ZERO.

Submitted by: josh@zipperup.org
Submitted by: Robert Drehmel <robd@gmx.net>

Merged from sys/i386/isa/clock.c revision 1.164.

Make diskerr() always log with printf.

Lock down the network interface queues. The queue mutex must be obtained
before adding/removing packets from the queue. Also, the if_obytes and
if_omcasts fields should only be manipulated under protection of the mutex.

IF_ENQUEUE, IF_PREPEND, and IF_DEQUEUE perform all necessary locking on
the queue. An IF_LOCK macro is provided, as well as the old (mutex-less)
versions of the macros in the form _IF_ENQUEUE, _IF_QFULL, for code which
needs them, but their use is discouraged.

Two new macros are introduced: IF_DRAIN() to drain a queue, and IF_HANDOFF,
which takes care of locking/enqueue, and also statistics updating/start
if necessary.

Merged from the following changes.

sys/conf/Makefile.i386 1.211
sys/conf/files.i386 1.329
sys/isa/fd.c 1.186, 1.188 and 1.189
sys/isa/sio.c 1.305 and 1.317
sys/i386/conf/GENERIC 1.270, 1.281, 1.282 and 1.284
sys/i386/i386/machdep.c 1.419
sys/i386/i386/userconfig.c 1.184

Restore GDC mode to initial mode instead of 24KHz.

Submitted by: Tomokazu HARADA <tkhara@osk4.3web.ne.jp>

Catch up to the new swi code.

Noticed by: phk

- Overhaul the software interrupt code to use interrupt threads for each
type of software interrupt. Roughly, what used to be a bit in spending
now maps to a swi thread. Each thread can have multiple handlers, just
like a hardware interrupt thread.
- Instead of using a bitmask of pending interrupts, we schedule the specific
software interrupt thread to run, so spending, NSWI, and the shandlers
array are no longer needed. We can now have an arbitrary number of
software interrupt threads. When you register a software interrupt
thread via sinthand_add(), you get back a struct intrhand that you pass
to sched_swi() when you wish to schedule your swi thread to run.
- Convert the name of 'struct intrec' to 'struct intrhand' as it is a bit
more intuitive. Also, prefix all the members of struct intrhand with
'ih_'.
- Make swi_net() a MI function since there is now no point in it being
MD.

Submitted by: cp

Used kbio.h and consio.h instead of machine/console.h.

Merged from sys/i386/isa/clock.c revision 1.160.

Remove unneeded #include <machine/clock.h>

Clean up as in isa/* - resource_query_string() loop cosmetic tweaks.

Fixed warnings.

Fixed include files to use sys/{cons,fb,kb}io.h instead of
machine/console.h.

Merged from sys/isa/sio.c revision 1.316.

Merged from sys/i386/isa/clock.c revisions 1.158 and 1.159.

Merged from sys/isa/sio.c revision 1.315.

Merged from sys/isa/fd.c revision 1.187.

Pointed out by: nyan

Merged from sys/i386/isa/sio.c revision 1.314.

Merged from sys/i386/isa/clock.c revision 1.157.

Merged from sys/isa/sio.c revision 1.312.

Merged from sys/isa/sio.c revisions 1.309 - 1.311.

Merged from sys/isa/sio.c revision 1.306, 1.307 and 1.308.

Merged from sys/i386/isa/clock.c revision 1.156.

Changed default cursor shape to non-blink mode.

Submitted by: Tomokazu HARADA <tkhara@osk4.3web.ne.jp>

Fixed PC-9821 NOTE supports with LINE30 mode.

Submitted by: Tomokazu HARADA <tkhara@osk4.3web.ne.jp>

Merged from sys/i386/isa/clock.c revision 1.155.

Merged from sys/dev/syscons/scterm-sc.c revisions from 1.8 to 1.12.

Backed out a part of previous commit. The function name conflicts.

Pointed out by: haro@tk.kubota.co.jp (Munehiro Matsuda)

Merge from the following changes.

sys/conf/files.i386 1.321
sys/dev/syscons/syscons.c 1.343
sys/i386/isa/spkr.c 1.46
sys/isa/fd.c 1.183 and 1.185
sys/isa/syscons_isa.c 1.14
sys/isa/vga_isa.c 1.18

Previous commit changing SYSCTL_HANDLER_ARGS violated KNF.

Pointed out by: bde

Style police catches up with rev 1.26 of src/sys/sys/sysctl.h:

Sanitize SYSCTL_HANDLER_ARGS so that simplistic tools can grog our
sources:

-sysctl_vm_zone SYSCTL_HANDLER_ARGS
+sysctl_vm_zone (SYSCTL_HANDLER_ARGS)

Merged from sys/i386/isa/isa_dma.c revision 1.6.

Merged from sys/i386/isa/clock.c revision 1.152.

Sync with sys/dev/syscons/scterm-sc.c revisions 1.6 and 1.7.

Fixed to support RSA98-III non-pnp mode. rman_get_start() had returned
iobase + 8 because the I/O address table for RSA98-III starts with +8.
Now, bus_alloc_resource() is used instead of isa_alloc_resourcev() if
device type is RSA98III.

Merged from sys/isa/syscons_isa.c revision 1.13.

Merged from sys/i386/isa/{clock.c,npx.c} revisions 1.151 and 1.82,
respectively.

Update of isa drivers using compatability shims to use COMPAT_ISA_DRIVER().

Submitted by: haro@tk.kubota.co.jp (Munehiro Matsuda)

Sync with sys/isa/ppc.c revision 1.27.

Fixed header file path (machine/lpt.h -> dev/ppbus/lptio.h).

Use bus_space stuff except where it needs high performance.

Separate the struct bio related stuff out of <sys/buf.h> into
<sys/bio.h>.

<sys/bio.h> is now a prerequisite for <sys/buf.h> but it shall
not be made a nested include according to bdes teachings on the
subject of nested includes.

Diskdrivers and similar stuff below specfs::strategy() should no
longer need to include <sys/buf.> unless they need caching of data.

Still a few bogus uses of struct buf to track down.

Repocopy by: peter

Fixed to support JIS7 KANJI.

Submitted by: Nobuyuki Koganemaru <kogane@koganemaru.co.jp>

Supported EGC 640x400, PEGC 640x400 and PEGC 640x480 graphics modes.

Submitted by: Chiharu Shibata <chi@bd.mbn.or.jp> and
Tomokazu HARADA <tkhara@osk4.3web.ne.jp>

Release allocated resources and return ENXIO on error.

Remove ~25 unneeded #include <sys/conf.h>
Remove ~60 unneeded #include <sys/malloc.h>

Complete the bio/buf divorce for all code below devfs::strategy

Exceptions:
Vinum untouched. This means that it cannot be compiled.
Greg Lehey is on the case.

CCD not converted yet, casts to struct buf (still safe)

atapi-cd casts to struct buf to examine B_PHYS

Move B_ERROR flag to b_ioflags and call it BIO_ERROR.

(Much of this done by script)

Move B_ORDERED flag to b_ioflags and call it BIO_ORDERED.

Move b_pblkno and b_iodone_chain to struct bio while we transition, they
will be obsoleted once bio structs chain/stack.

Add bio_queue field for struct bio aware disksort.

Address a lot of stylistic issues brought up by bde.

Merged from sys/isa/sio.c revisions 1.293 and 1.294.

- Supported display suspended mode.
- Switch on/off not only text screen but also graphic screen.

Submitted by: chi@bd.mbn.or.jp (Chiharu Shibata)

Merge from the following changes.

File Revision
sys/conf/files.i386 1.303 and 1.304
sys/dev/kbd/atkbd.c 1.23
sys/dev/syscons/scterm-sc.c 1.2
sys/dev/syscons/scvgarndr.c 1.5
sys/dev/syscons/scvtb.c 1.5
sys/dev/syscons/syscons.c 1.335
sys/isa/syscons_isa.c 1.11
sys/isa/vga_isa.c 1.17

Merged from sys/isa/fd.c revision 1.180.

Merged from sys/i386/isa/clock.c and sys/isa/sio.c revisions 1.150 and
1.292, respectively.

Disable fdctl_wr_foo. This feature is not supported by PC98.

Fixed style bugs.

Rename the existing BUF_STRATEGY() to DEV_STRATEGY()

substitute BUF_WRITE(foo) for VOP_BWRITE(foo->b_vp, foo)

substitute BUF_STRATEGY(foo) for VOP_STRATEGY(foo->b_vp, foo)

This patch is machine generated except for the ccd.c and buf.h parts.

Remove B_READ, B_WRITE and B_FREEBUF and replace them with a new
field in struct buf: b_iocmd. The b_iocmd is enforced to have
exactly one bit set.

B_WRITE was bogusly defined as zero giving rise to obvious coding
mistakes.

Also eliminate the redundant struct buf flag B_CALL, it can just
as efficiently be done by comparing b_iodone to NULL.

Should you get a panic or drop into the debugger, complaining about
"b_iocmd", don't continue. It is likely to write on your disk
where it should have been reading.

This change is a step in the direction towards a stackable BIO capability.

A lot of this patch were machine generated (Thanks to style(9) compliance!)

Vinum users: Greg has not had time to test this yet, be careful.

Merged from sys/isa/fd.c.

Fixed to support old parallel interface.

Submitted by: chi@bd.mbn.or.jp (Chiharu Shibata)

Stop isadma from abusing the B_READ, B_RAW and B_WRITE flags.

Define ISADMA_{READ,WRITE,RAW} macros with the same numeric
values as the B_{READ,WRITE,RAW} and use them instead throughout.

Merged from sys/isa/sio.c revision 1.291.

Merged from sys/isa/sio.c revisions 1.289 and 1.290.

Merged from sys/isa/sio.c rev 1.288.

Synced with sys/dev/syscons/scterm-sc.c rev 1.4.

Synced with sys/isa/ppc.c rev 1.26.

Synced with sys/isa/ppc.c rev 1.25.

Reminded by: nyan

Synced with sys/isa/sio.c rev 1.287.

Return ENXIO on error.

Submitted by: n_hibma

Synced with the sc driver in the sys/dev/syscons directory.

Submitted by: yokota

Synced with sys/isa/sio.c rev 1.285.

Port of the PC-98 ppc to the newbus system.

Synced with following changes:

>yokota 2000/01/11 05:39:06 PST
>
> Modified files:
> sys/dev/usb ukbd.c
> sys/dev/kbd atkbd.c kbd.c kbdreg.h
> Log:
> Rework shifta/ctla/alta key handling. It appears that there was
> misunderstanding between the PR originator and me. I hope I got it
> right this time.
>
> Revision Changes Path
> 1.22 +4 -1 src/sys/dev/usb/ukbd.c
> 1.21 +1 -8 src/sys/dev/kbd/atkbd.c
> 1.16 +19 -10 src/sys/dev/kbd/kbd.c
> 1.9 +2 -2 src/sys/dev/kbd/kbdreg.h

Submitted by: yokota

Synced with sys/isa/sio.c rev 1.284.

Merge from sys/isa/fd.c revision from 1.171 to 1.176 and sys/isa/fdreg.h
revision 1.13.

Forgotten by: kato

Synced with sys/i386/isa/clock.c rev 1.149.

- Fixed warnings.
- Removed unnecessary include files.

Synced with sys/isa/sio.c rev 1.282.

Synced with sys/i386/isa/clock.c rev 1.148. This is a cosmetic change
because PC-98 doesn't have RTC and RTC related code is included by
`#ifndef PC98' and `#endif'.

merge i386/isa/clock.c 1.147: don't talk about register_intr in comments.

Removed unnecessary include file.

Merge from sys/dev/kbd/kbd.c rev 1.13.

Submitted by: yokota

Merge from sys/isa/sio.c rev 1.279.

Sync with sys/dev/fb/vga.c rev 1.5.

Submitted by: yokota

Merge from sys/isa/fd.c rev 1.170.

Merge from sys/isa/sio.c rev 1.277 & 1.278.

Supported i8251 (internal COM1) FIFO mode.

Submitted by: tanimura and nyan

Remove the 'ivars' arguement to device_add_child() and
device_add_child_ordered(). 'ivars' may now be set using the
device_set_ivars() function.

This makes it easier for us to change how arbitrary data structures are
associated with a device_t. Eventually we won't be modifying device_t
to add additional pointers for ivars, softc data etc.

Despite my best efforts I've probably forgotten something so let me know
if this breaks anything. I've been running with this change for months
and its been quite involved actually isolating all the changes from
the rest of the local changes in my tree.

Reviewed by: peter, dfr

Sync with sys/isa/sio.c revision 1.276.

- Fixed to support RSB-384/2000/3000.
- Fixed warnings.

Sync with sys/isa/sio.c revision up to 1.275.

Sync with sys/isa/fd.c revision 1.168.

Fixed the size of array.

Sync with sys/isa/fd.c revision 1.167.

Use cdevsw_add() until the rest of the devices are created with make_dev()
and change from DEV_DRIVER_MODULE() to DRIVER_MODULE().

Support RSA-98III PnP mode.

Sync with sys/isa/sio.c revision from 1.269 to 1.273.

Sync with sys/i386/isa/clock.c revision 1.146.

Merge from sys/isa/fd.c revision 1.146, 1.153, 1.154 and 1.159.

Remove five now unused fields from struct cdevsw. They should never
have been there in the first place. A GENERIC kernel shrinks almost 1k.

Add a slightly different safetybelt under nostop for tty drivers.

Add some missing FreeBSD tags

This patch clears the way for removing a number of tty related
fields in struct cdevsw:

d_stop moved to struct tty.
d_reset already unused.
d_devtotty linkage now provided by dev_t->si_tty.

These fields will be removed from struct cdevsw together with
d_params and d_maxio Real Soon Now.

The changes in this patch consist of:

initialize dev->si_tty in *_open()
initialize tty->t_stop
remove devtotty functions
rename ttpoll to ttypoll
a few adjustments to these changes in the generic code
a bump of __FreeBSD_version
add a couple of FreeBSD tags

Remove NBPF conditionality of bpf calls in most of our network drivers.

This means that we will not have to have a bpf and a non-bpf version
of our driver modules.

This does not open any security hole, because the bpf core isn't loadable

The drivers left unchanged are the "cross platform" drivers where the respective
maintainers are urged to DTRT, whatever that may be.

Add a couple of missing FreeBSD tags.

- Supported 1.23MB FD again.
- Supported all formats that IBM-PC's driver (isa/fd.c) supports.
- Changed the device minor numbers. They sync in IBM-PC's driver.

Two more devstat_end_transaction() -> devstat_end_transaction_buf().

Use devstat_end_transaction_buf() rather than Use devstat_end_transaction()

Gdc and pckbd driver don't support pnp mode.

Removed diskerr()'s unused d_name arg and updated callers. This fixes
warnings caused by the arg having the wrong type (not const enough).
The arg was also wrong (a full name instead of a short one) for calls
from from subr_diskmbr.c and pc98/diskslice_machdep.c.

Fixed missing changes from sys/isa/sio.c.

Change isa_get/set_flags() to device_get/set_flags().

Submitted by: dfr

Merge from sys/i386/isa/clock.c revision 1.145.

$Id$ -> $FreeBSD$

Remove some vestiges of devfs direct calls.

Add PHK's make_dev() into more places where DEVFS used to be
hooked in directly.

Alpha change checked by: Matthew Jacob <mjacob@feral.com>
i4b ISDN changes checked by: Udo Schweigert <ust@cert.siemens.de>
and Hellmuth Michaelis <hm@hcs.de>
PC98 changes checked by: Takahashi Yoshihiro <nyan@FreeBSD.org>

Updated to new keyboard driver.

Submitted by: yokota & nyan

Use V-FAST mode register to check whether it supports V-FST mode.

Submitted by: WATANABE Takuya <sodium@xuni.ne.jp>

Spring cleaning around strategy and disklabels/slices:

Introduce BUF_STRATEGY(struct buf *, int flag) macro, and use it throughout.
please see comment in sys/conf.h about the flag argument.

Remove strategy argument from all the diskslice/label/bad144
implementations, it should be found from the dev_t.

Remove bogus and unused strategy1 routines.

Remove open/close arguments from dssize(). Pick them up from dev_t.

Remove unused and unfinished setgeom support from diskslice/label/bad144 code.

Fixed checking a type of the interface.

Submitted by: Tomohiko Kurahashi <kura@tim.hi-ho.ne.jp>

Merge the cons.c and cons.h to the best of my ability. alpha may or
may not compile, I can't test it.

Sync with sys/i386/isa/clock.c revision up to 1.142.

Alter the behavior of sys/kern/subr_bus.c:device_print_child()

- device_print_child() either lets the BUS_PRINT_CHILD
method produce the entire device announcement message or
it prints "foo0: not found\n"

Alter sys/kern/subr_bus.c:bus_generic_print_child() to take on
the previous behavior of device_print_child() (printing the
"foo0: <FooDevice 1.1>" bit of the announce message.)

Provide bus_print_child_header() and bus_print_child_footer()
to actually print the output for bus_generic_print_child().
These functions should be used whenever possible (unless you can
just use bus_generic_print_child())

The BUS_PRINT_CHILD method now returns int instead of void.

Modify everything else that defines or uses a BUS_PRINT_CHILD
method to comply with the above changes.

- Devices are 'on' a bus, not 'at' it.
- If a custom BUS_PRINT_CHILD method does the same thing
as bus_generic_print_child(), use bus_generic_print_child()
- Use device_get_nameunit() instead of both
device_get_name() and device_get_unit()
- All BUS_PRINT_CHILD methods return the number of
characters output.

Reviewed by: dfr, peter

Sync with sys/i386/isa/clock.c revision up to 1.140.
This commit may break 8MHz system clock mode.

Fixed missing changes from sys/pc98/pc98/pc98.c when new-bus was integrated.

- In isa_dmastart() and isa_dmadone(), cache flush.
- Correct current word register address.

Submitted by (partial): Toshikazu Kaho <kaho@elam.kais.kyoto-u.ac.jp>

Rename bpfilter to bpf.

Remove cmaj and bmaj args from DEV_DRIVER_MODULE.

Added copyright.

Pointed out by: yokota

Moved LCD controle routine for certain models of EPSON laptops into
suitable place.

Submitted by: yokota

Typo: BUF_INITLOCK -> BUF_LOCKINIT and BUF_FREELOCK -> BUF_LOCKFREE.

Sync with sys/i386/isa/clock.c revision 1.138.

Convert buffer locking from using the B_BUSY and B_WANTED flags to using
lockmgr locks. This commit should be functionally equivalent to the old
semantics. That is, all buffer locking is done with LK_EXCLUSIVE
requests. Changes to take advantage of LK_SHARED and LK_RECURSIVE will
be done in future commits.

From submitter:
The attached diff attempts to eliminate as much of the difference
between the i386 and the pc98 version of the file as possible. It
should not make any semantic difference (it consists of whitespace
changes, order changes, comment changes, changes of case for hex
constants, and merging in a couple of constants that hadn't made it
from the i386 version.)

Submitted by: eivind

Sync with sys/dev/syscons/scvtb.c revision 1.2.

Submitted by: yokota

Merge with sys/isa/syscons_isa.c and sys/dev/syscons/syscons.c
revisions 1.6 and 1.308, respectively.

Pointed-out by: yokota

PC98 part of the second phase of syscons reorganization.

Submitted by: yokota

Sync with sys/i386/isa/clock.c revision 1.137.

New parallel port support for PC98. Old PC98s which have
uni-directional parallel port should use olpt driver instead of lpt
driver.

Files ppc.c and ppcreg.h are copied form i386/isa directory with PC98
change.

Submitted by: Akio Morita <amorita@meadow.scphys.kyoto-u.ac.jp>

Fixed locations of include files.

Sync with sys/i386/isa/clock.c revision 1.136.

This commit should be a extensive NO-OP:

Reformat and initialize correctly all "struct cdevsw".

Initialize the d_maj and d_bmaj fields.

The d_reset field was not removed, although it is never used.

I used a program to do most of this, so all the files now use the
same consistent format. Please keep it that way.

Vinum and i4b not modified, patches emailed to respective authors.

Sync with sys/isa/sio.c revision 1.241.

Sync with sys/i386/isa/fd.c revision 1.143.

Fixed for COM_MULTIPORT option. Members flags and unit should be
obtained via appropriate functions.

Sync with sys/isa/sio.c revision 1.240.

Sync with sys/i386/isa/isa_dma.c revision 1.3.

Sync with sys/i386/isa/clock.c revision 1.133.

Unconfuse DEV_MODULE() and DEV_DRIVER_MODULE() about the difference between
a major number for a dev_t.

Sync with sys/isa/sio.c revision 1.234.

Removed DRIVER_TYPE_TTY field.

Sync with sys/isa/atkbd_isa.c revision 1.4.

Sync with sys/i386/isa/fd.c revision 1.142.

Continue where Julian left off in July 1998:

Virtualize bdevsw[] from cdevsw. bdevsw() is now an (inline)
function.

Join CDEV_MODULE and BDEV_MODULE to DEV_MODULE (please pay attention
to the order of the cmaj/bmaj arguments!)

Join CDEV_DRIVER_MODULE and BDEV_DRIVER_MODULE to DEV_DRIVER_MODULE
(ditto!)

(Next step will be to convert all bdev dev_t's to cdev dev_t's
before they get to do any damage^H^H^H^H^H^Hwork in the kernel.)

Introduce two functions: physread() and physwrite() and use these directly
in *devsw[] rather than the 46 local copies of the same functions.

(grog will do the same for vinum when he has time)

remove b_proc from struct buf, it's (now) unused.

Reviewed by: dillon, bde

Sync with sys/i386/isa/fd.c revision 1.137.

Fixed missing parenthesis.

Submitted by: Takahashi Yoshihiro <nyan@dd.catv.ne.jp>

Sync with sys/i386/isa/clock.c revision 1.132.

Suser() simplification:

1:
s/suser/suser_xxx/

2:
Add new function: suser(struct proc *), prototyped in <sys/proc.h>.

3:
s/suser_xxx(\([a-zA-Z0-9_]*\)->p_ucred, \&\1->p_acflag)/suser(\1)/

The remaining suser_xxx() calls will be scrutinized and dealt with
later.

There may be some unneeded #include <sys/cred.h>, but they are left
as an exercise for Bruce.

More changes to the suser() API will come along with the "jail" code.

Sync with sys/i386/isa/isa_dma.c revision 1.2.

Sync with sys/i386/isa/clock.c revision 1.131.

Fixed missing changes for new-bus (return value of the probe routine).

Submitted by: Takahashi Yoshihiro <nyan@dd.catv.ne.jp>

Sync with sys/isa/sio.c revision 1.226.

Sync with follwing files:

Path Revision
i386/conf/GENERIC 1.162
i386/conf/Makefile.i386 1.146
i386/conf/files.i386 1.236
i386/conf/options.i386 1.111
i386/i386/machdep.c 1.329
i386/i386/userconfig.c 1.134
i386/isa/fd.c 1.135
i386/isa/if_ed.c 1.151
i386/isa/isa_dam.c 1.1
i386/isa/npx.c 1.67
isa/sio.c 1.224
dev/syscons/syscons.c 1.300
i386/isa/wd.c 1.194
isa/vga_isa.c 1.5
isa/atkbd_isa.c 1.3
isa/syscons_isa.c 1.2

Submitted by: Takahashi Yoshihiro <nyan@wyvern.cc.kogakuin.ac.jp>

Use PHOLD/PRELE() instead of P_PHSYIO.

Sync with sys/i386/isa/sio.c revision 1.234.

Sync with sys/i386/isa/sio.c revision up to 1.233.

Sync with sys/i386/isa/sio.c revision up to 1.231.

Keyboard driver update.

Submitted by: Kazutaka YOKOTA <yokota@FreeBSD.org>

Sync with sys/i386/isa/sio.c revision 1.229.

Fix for LINE30 option. This option was not tested under new console
driver.

Submitted by: Takahashi Yoshihiro <nyan@dd.catv.ne.jp>

Add a prioritization field to the devstat_add_entry() call so that
peripheral drivers can determine where in the devstat(9) list they are
inserted.

This requires recompilation of libdevstat, systat, vmstat, rpc.rstatd, and
any ports that depend on the devstat code, since the size of the devstat
structure has changed. The devstat version number has been incremented as
well to reflect the change.

This sorts devices in the devstat list in "more interesting" to "less
interesting" order. So, for instance, da devices are now more important
than floppy drives, and so will appear before floppy drives in the default
output from systat, iostat, vmstat, etc.

The order of devices is, for now, kept in a central table in devicestat.h.
If individual drivers were able to make a meaningful decision on what
priority they should be at attach time, we could consider splitting the
priority information out into the various drivers. For now, though, they
have no way of knowing that, so it's easier to put them in an easy to find
table.

Also, move the checkversion() call in vmstat(8) to a more logical place.

Thanks to Bruce and David O'Brien for suggestions, for reviewing this, and
for putting up with the long time it has taken me to commit it. Bruce did
object somewhat to the central priority table (he would rather the
priorities be distributed in each driver), so his objection is duly noted
here.

Reviewed by: bde, obrien

Sync with syscons for i386.

Submitted by: Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>

Sync with sys/i386/isa/sio.c revision up to 1.228.

Submitted by: Takahashi Yoshihiro <nyan@wyvern.cc.kogakuin.ac.jp>

Added braces around initializsers and in if-statements.

Submitted by: Takahashi Yoshihiro <nyan@dd.catv.ne.jp>

Use suser() to check for super user rather than examining cr_uid directly.
Use TTYDEF_SPEED rather than 9600 a couple of places.

Reviewed by: bde, with a few grumbles.

The "easy" fixe for compiling the kernel -Wunused: remove unreferenced
local variable.

The "easy" fixes for compiling the kernel -Wunused: remove unreferenced static
and local variables, goto labels, and functions declared but not defined.

Sync with sys/i386/isa/sio.c revision 1.225.

Fixed argument to intr member of the variable kbd.

Sync with sys/dev/syscons and sys/dev/kbd drivers.

Submitted by: Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>

Update the pccard hooks to use a module style declaration instead.

Added copyright.

Pointed out by: Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>

Don't forget to initialize va_mode.

Submitted by: Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
Forgotten by: kato

Switched to new syscons driver.

Submitted by: NOKUBI Hirotaka <hnokubi@yyy.or.jp> and
Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>

Sync with sys/i386/isa/sio.c revision up to 1.223.

Sync with sys/i386/isa/fd.c revision 1.131.

Sync with sys/i386/isa/sio.c and syscons.c revisions 1.221 and 1.289,
respectively.

- Remove bus-dependent addresses from `ic' file.
- Special registers of IO-DATA device's RSA series are defined in
ic/rsa.h (new file).

Pointed out by: Bruce Evans <bde@zeta.org.au>
Submitted by: Takahashi Yoshihiro <nyan@wyvern.cc.kogakuin.ac.jp>

Support following devices:
- on board 2nd CCU
- Midori Elec. MDC-926Rs
- Midori-Hayes ESP98
- NEC PC-9861K, PC-9801-101 PC-9801-120
- Melco IND-SP and IND-SS
- PIO-9032A/B/C
- B98-01 and B98-02
- IO-data device RSA-98II and RSA-98III
- MC-16550
- MC-RS98
- Media Inteligent RSB-2000/3000 and RSB-384
- PCMCIA modem card

Submitted by: Takahashi Yoshihiro <nyan@wyvern.cc.kogakuin.ac.jp>

Sync with sys/i386/isa/sio.c revision 1.220.

Sync with sys/i386/isa/fd.c revision 1.130.

Sync with sys/i386/isa/clock.c revision 1.129.

Sync with sys/i386/isa/fd.c revision 1.129.

Sync with sys/i386/isa/fd.c revision 1.128.

Rename one of the two devfs_link's to devfs_makelink.

Sync with sys/i386/isa/fd.c, if_fe.c, npx.c and sio.c revisions 1.126,
1.44, 1.63 and 1.219, respectively.

Sync with sys/i386/isa/fd.c revision 1.125.

Sync with sys/i386/isa/sio.c revision up to 1.218.

Sync with sys/i386/isa/clock.c revision 1.128.

Initialize isa_devtab entries for interrupt handlers in individual
device drivers, not in ioconf.c. Use a different hack in isa_device.h
so that a new config(8) is not required yet.

pc98 parts approved by: kato

Fix for wrap arround.

Implement TSC clock calibration for PC-98.

Sync with sys/i386/isa/clock.c revision 1.127.

Sync with sys/i386/isa/clock.c revision 1.126.

Sync with sys/i386/isa/fd.c revision 1.123.

Sync with sys/i386/isa/fd.c and wd.c revisions 1.122 and 1.176,
respectively.

Remove the SLICE code.
This clearly needs alot more thought, and we dont need this to hunt
us down in 3.0-RELEASE.

Sync with sys/i386/isa/if_ed.c and sio.c revisions 1.145 and 1.215,
respectively.

Sync with sys/i386/isa/clock.c revision 1.125.

Sync with sys/i386/isa/sio.c revision up to 1.214.

Sync with sys/i386/isa/sio.c revision 1.211.

Sync with sys/i386/isa/sio.c revision 1.210.

Sync with sys/i386/isa/fd.c revision 1.120.

Sync with sys/i386/isa/fd.c revision 1.119.

Sync with sys/i386/isa/fd.c revision 1.118.

Changed %n to %r in devfs name format strings. %n has almost gone away.

Sync with sys/i386/isa/fd.c and wd.c revisions 1.117 and 1.172,
respectively.

Sync with sys/i386/isa/fd.c revision 1.116.

Sync with sys/i386/isa/fd.c and wd.c revisions 1.115 and 1.170,
respectively.

Sync with sys/i386/isa/syscons.c revision 1.208.

Sync with sys/i386/isa/sio.c revision 1.207.

Sync with sys/i386/isa/clock.c revision 1.124.

Sync with sys/i386/isa/clock.c revision 1.123.

Merge 64bit portability fixes from sys/i386 stuff.

Sync with sys/i386/isa/clock.c revision 1.122.

Sync with sys/i386/isa/sio.c revision up to 1.205.

Sync with sys/i386/isa/sio.c revision 1.203.

Sync with sys/i386/isa/clock.c revision 1.121.

Sync with sys/i386/isa/sio.c revision 1.202.

Sync with sys/i386/isa/clock.c revision 1.120.

Sync with sys/i386/isa/sio.c revision 1.201.

Sync with sys/i386/isa/fd.c revision 1.112.

Sync with sys/i386/isa/sio.c revision 1.200.

System clock speed is always detected automatically.

close() is no longer a SLICE method.
Close is simply an open with no-read and no-write once internal to SLICE
(it still exports a close to the rest of the kernel)

Sync with sys/i386/isa/fd.c revision 1.109.

Seventy-odd "its" / "it's" typos in comments fixed as per kern/6108.

Sync with sys/i386/isa/clock.c revision 1.119.

Sync with sys/i386/i386/trap.c revision 1.125 and sys/i386/isa/clock.c
revision 1.118.

Sync with sys/i386/isa/clock.c revision 1.117.

Sync with sys/i386/isa/clock.c revision 1.116.

Sync with sys/i386/isa/clock.c revision 1.115.

Sync with sys/i386/isa/clock.c revision 1.114.

Sync with sys/i386/isa/sio.c revision up to 1.199.

Sync with sys/i386/isa/clock.c revision 1.113.

Sync with sys/i386/isa/clock.c revision 1.112.

Oops, previous commit was incomplete.

Sync with sys/i386/isa/clock.c revision 1.111.

Sync with sys/i386/isa/sio.c revision 1.197.

Implement the spirit but not the letter of Terrys hot-char patch.

The differences Terrys patch and this patch are:
* Remove a lot of un-needed comments.
* Don't put l_hotchar at the front of stuct linesw, there is no need to.
* Use the #defines for the hotchar in the SLIP and PPP line disciplines

Sync with sys/i386/isa/clock.c revision 1.110.

Sync with sys/i386/isa/clock.c and spker.c revision 1.109 and 1.32,
resplectivley.

Fixed bugs introduced by syncing with i386/isa/sio.c revision 1.143.

Submitted by: Takahashi Yoshihiro <nyan@wyvern.cc.kogakuin.ac.jp>

Sync with sys/i386/isa/clock.c revision 1.108.

Make all file-system (MFS, FFS, NFS, LFS, DEVFS) related option new-style.

This introduce an xxxFS_BOOT for each of the rootable filesystems.
(Presently not required, but encouraged to allow a smooth move of option *FS
to opt_dontuse.h later.)

LFS is temporarily disabled, and will be re-enabled tomorrow.

Added dealy.

Submitted by: Kawanobe Koh <kawanobe@st.rim.or.jp>

Fixed bugs introduced when files were synchronized with
sys/i386/isa/mse.c and sio.c.

Submitted by: Takahashi Yoshihiro <nyan@wyvern.cc.kogakuin.ac.jp>