Commit Graph

151 Commits

Author SHA1 Message Date
Steve Passe
1de995bb1f General cleanup of the sub-system locking macros.
Eliminated the RECURSIVE_MPINTRLOCK.
clock.c and microtime use clock_lock.
sio.c and cy.c use com_lock.

Suggestions by:	Bruce Evans <bde@zeta.org.au>
1997-09-01 07:45:37 +00:00
Steve Passe
78292efeef Another round of lock pushdown.
Add a simplelock to deal with disable_intr()/enable_intr() as used in UP kernel.
UP kernel expects that this is enough to guarantee exclusive access to
regions of code bracketed by these 2 functions.
Add a simplelock to bracket clock accesses in clock.c: clock_lock.

Help from:	Bruce Evans <bde@zeta.org.au>
1997-08-30 08:08:10 +00:00
Bruce Evans
b1037dcd53 #include <machine/limits.h> explicitly in the few places that it is required. 1997-08-21 20:33:42 +00:00
Steve Passe
4a73d99f7e Made PEND_INTS default.
Made NEW_STRATEGY default.
Removed misc. old cruft.

Centralized simple locks into mp_machdep.c
Centralized simple lock macros into param.h

More cleanup in the direction of making splxx()/cpl MP-safe.
1997-08-21 05:08:25 +00:00
Steve Passe
12084b3cf1 clock.c:
- removed TEST_ALTTIMER.
 - removed APIC_PIN0_TIMER.
 - removed TIMER_ALL.

apic_vector.s:
 - new algorithm where a CPU uses try_mplock instead of get_mplock:
	if successful continue as before.
	if fail set ipending bit, mask INT (to avoid recursion), cleanup & iret.

   This allows the CPU to return to successful work, while the ISR will be run
   by the CPU holding the lock as part of the doreti dance.
1997-07-26 01:53:04 +00:00
Steve Passe
87a6f31089 Last commit didn't take, operator error??? 1997-07-22 20:12:32 +00:00
Steve Passe
35b3c4a0e5 Developed a new strategy for handling the 8254/8259/APIC issue. 1997-07-20 19:41:38 +00:00
Steve Passe
0571e04aee Minor cleanup. 1997-07-20 18:02:59 +00:00
Bruce Evans
f71d35e402 Removed unused #includes. 1997-07-20 14:10:18 +00:00
Steve Passe
797cb61b54 Added #code to support define APIC_PIN0_TIMER.
This code ALWAYS runs the 8254 timer thru the 8259 ICU.
It depricates the usage of "options SMP_TIMER_NC" in the config file.
1997-07-19 03:59:28 +00:00
Steve Passe
bed422e5a3 SMP or APIC_IO:
- Increased NIDT to 256.
 - Moved IPI vectors up above the linux compat vector.
 - Removed runtime setup of RTC vector.
1997-07-19 02:28:30 +00:00
Steve Passe
7bbd2262eb Made the printing of the APIC INTs depend on bootverbose. 1997-07-18 03:59:28 +00:00
Steve Passe
c064ef9175 Cleanup old stop_cpus/restart_cpus() cruft.
new code for handling mixed-mode 8259/APIC programming without 'ExtInt'
new code to control other CPUs: stop_cpus()/restart_cpus()/_Xstopcpu
1997-07-13 01:18:51 +00:00
Steve Passe
293f18dbbf Modified to use merged/renamed functions:
- get_isa_apic_mask() -> isa_apic_mask()
 - get_isa_apic_irq() && get_eisa_apic_irq() -> isa_apic_pin()
1997-06-25 21:00:00 +00:00
Doug Rabson
683523378c Move interrupt handling code from isa.c to a new file. This should make
isa.c (slightly) more portable and will make my life developing the really
portable version much easier.

Reviewed by:	peter, fsmp
1997-06-02 08:19:06 +00:00
Peter Wemm
5400ed3b2f Include file updates.. <machine/spl.h> -> <machine/ipl.h>, add
<machine/ipl.h> to those files that were depending on getting SWI_*
implicitly via <machine/cpufunc.h>
1997-05-31 09:27:31 +00:00
Peter Wemm
7a14de6260 No longer need opt_smp.h here 1997-05-29 05:00:35 +00:00
Steve Passe
383243e687 Made the array vec[] a global.
This allows the APIC code to reorder the vectors at runtime.
1997-05-25 16:55:26 +00:00
Peter Wemm
f435322e07 correct the order of the variables
use #ifdef where possible instead of #if defined

Submitted by: the KNF police, ie: bde :-)
1997-05-05 09:34:33 +00:00
Peter Wemm
26e5316524 Don't remove i586_ctr_freq from scope, leave it defined as zero. This
simplifies some assumptions and stops some code compile problems.

This should fix the compile hiccup in PR#3491, but smp kernel profiling
isn't likely to be fixed by this.
1997-05-04 14:25:00 +00:00
Peter Wemm
477a642cee Man the liferafts! Here comes the long awaited SMP -> -current merge!
There are various options documented in i386/conf/LINT, there is more to
come over the next few days.

The kernel should run pretty much "as before" without the options to
activate SMP mode.

There are a handful of known "loose ends" that need to be fixed, but
have been put off since the SMP kernel is in a moderately good condition
at the moment.

This commit is the result of the tinkering and testing over the last 14
months by many people.  A special thanks to Steve Passe for implementing
the APIC code!
1997-04-26 11:46:25 +00:00
Stephen McKay
bc19f8a39e Prevent wedging of the stat clock because of missed interrupts.
This should cure the "alternate system clock has died!" problem.

Discussed with: bde, joerg
1997-04-06 13:25:48 +00:00
Bruce Evans
65ff42dd17 Only print clock calibration messages if the system was booted with -v.
Submitted by:	partly by gpalmer
1997-03-05 08:08:48 +00:00
Gary Palmer
0b146b65d2 Back out the patch to break up the clock probe lines. Instead, follow
Bruce's suggestion of deleting "relative to mc146818A clock ",
thus shortening the line ...
1997-03-05 00:54:00 +00:00
Gary Palmer
5c5e8d766c Split the rather long and line-wrapping clock probe messages on boot.
(2.2?)

Submitted by:	Mathew Dood <winter@jurai.net>
1997-03-04 09:24:01 +00:00
Peter Wemm
6875d25465 Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not
ready for it yet.
1997-02-22 09:48:43 +00:00
Bruce Evans
49a116737e Estimate an initial overhead of 0 usec instead of 20 usec in DELAY().
I have code to calibrate the overhead fairly accurately, but there
is little point in using it since it is most accurate on machines
where an estimate of 0 works well.  On slow machines, the accuracy
of DELAY() has a large variance since it is limited by the resolution
of getit() even if the initial delay is calibrated perfectly.

Use fixed point and long longs to speed up scaling in DELAY().
The old method slowed down a lot when the frequency became variable.
Assume the default frequency for short delays so that the fixed
point calculation can be exact.

Fast scaling is only important for small delays.  Scaling is done
after looking at the counter and outside the loop, so it doesn't
decrease accuracy or resolution provided it completes before the
delay is up.  The comment in the code is still confused about this.
1997-01-29 22:51:44 +00:00
Bruce Evans
6bed7e5140 Guard against the i8254 timer being uninitialzed if DELAY() is
called early for console i/o.  The timer is usually in BIOS mode
if it isn't explicitly initialized.  Then it counts twice as fast
and has a max count of 65535 instead of 11932.  The larger count
tended to cause infinite loops for delays of > 20 us.  Such delays
are rare.  For syscons and kbdio, DELAY() is only called early
enough to matter for ddb input after booting with -d, and the delay
is too small to matter (and too small to be correct) except in the
PC98 case.  For pcvt, DELAY() is not used for small delays (pcvt
uses its own broken routine instead of the standard broken one),
but some versions call DELAY() with a large arg when they unnecessarily
initialize the keyboard for doing console output.  The problem is
more serious for pcvt because there is always some early console
output.

Guard against the i8254 timer being partially or incorrectly
initialized.  This would have prevented the endless loop.

Should be in 2.2.
1997-01-16 18:28:20 +00:00
Jordan K. Hubbard
1130b656e5 Make the long-awaited change from $Id$ to $FreeBSD$
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore.  This update would have been
insane otherwise.
1997-01-14 07:20:47 +00:00
Bruce Evans
9272350657 Removed initialization of a variable that went away. Oops. 1996-10-26 00:11:57 +00:00
Bruce Evans
2d872b777d Print the clock calibration messages all on one (long) line again so
that they are easy to grep for.

Removed now-unused i586 counter variables.

Fixed some style bugs.
1996-10-25 13:46:21 +00:00
Bruce Evans
c20b324bb6 Put I*86_CPU defines in opt_cpu.h. 1996-10-09 19:47:44 +00:00
Bruce Evans
831031ce00 Attached simple external ddb commands show rtc', show pgrpdump'
and `show cbstat'.  The pgrpdump code was previously controlled by
`#ifdef DEBUG'.
1996-09-14 10:53:48 +00:00
Bruce Evans
daed6ffd24 Changed cncheckc() interface so that it is 8-bit clean - return -1
instead of 0 if there is no input.

syscons.c:
Added missing spl locking in sccncheckc().  Return the same value as
sccngetc() would.  It is wrong for sccngetc() to return non-ASCII, but
stripping the non-ASCII bits doesn't help.
1996-09-14 04:27:46 +00:00
Bruce Evans
70e53371c4 Eliminated i586_ctr_rate. Use i586_ctr_freq instead. 1996-08-02 21:16:27 +00:00
Bruce Evans
33ded19fc2 Fixed the machdep.i8254_freq and machdep.i586_freq sysctls. Writes were
handled bogusly.

Centralized the setting of all the frequency variables.  Set these
variables atomically.  Some new ones aren't used yet.
1996-07-30 19:26:55 +00:00
Joerg Wunsch
3135240845 Post-commit review by Bruce. Mostly stylistic changes.
Submitted by:	bde
1996-07-21 08:20:51 +00:00
Joerg Wunsch
99211adf2c Major cleanup of the timerX_{acquire,release} stuff. In particular,
make it more intelligible, improve the partially bogus locking, and
allow for a ``quick re-acquiration'' from a pending release of timer 0
that happened ``recently'', so it was not processed yet by clkintr().
This latter modification now finally allows to play XBoing over
pcaudio without losing sounds or getting complaints. ;-)  (XBoing
opens/writes/closes the sound device all over the day.)

Correct locking for sysbeep().

Extensively (:-) reviewed by:	bde
1996-07-20 18:47:23 +00:00
Bruce Evans
65d98215ea Fixed adjustment of `time' when timer0 is released. 27465 was 27645 in
a comment and in code that was only used when pcaudio was closed.  The
maximum error was 66 usec.
1996-07-17 11:26:05 +00:00
Bruce Evans
d2700ee639 Use the standard timer (interrupt) frequency while calibrating the clocks.
Testing with the high frequency of 20000 Hz (to find problems) only found
the problem that this frequency is too high for slow i386's.

Disable interrupts while setting the timer frequency.  This was unnecessary
before rev.1.57 and forgotten in rev.1.57.  The critical (i8254) interrupts
are disabled in another way at boot time but not in the sysctl to change
the frequency.
1996-07-01 18:00:47 +00:00
Bruce Evans
16263f7a8b In getit(), use read_eflags()/write_eflags() to preserve the interrupt
enable flag instead of enable_intr() to restore it to its usual state.
getit() is only called from DELAY() so there is no point in optimising
its speed (this wasn't so clear when it was extern), and using
enable_intr() made it inconvenient to call DELAY() from probes that need
to run with interrupts disabled.
1996-06-17 12:50:22 +00:00
Paul Traina
8f33d986bc Move warning messages under bootverbose 1996-06-11 16:11:27 +00:00
Paul Traina
6d715e951e Put clock calibration #defines in opt_clock.h to ease reconfiguration 1996-06-11 16:02:55 +00:00
Bruce Evans
2dafbfcbab Added calibration the i8254 and the i586 clocks agains the RTC at boot
time.  The results are currently ignored unless certain temporary options
are used.

Added sysctls to support reading and writing the clock frequency variables
(not the frequencies themselves).  Writing is supposed to atomically
adjust all related variables.

machdep.c:
Fixed spelling of a function name in a comment so that I can log this
message which should have been with the previous commit.

Initialize `cpu_class' earlier so that it can be used in startrtclock()
instead of in calibrate_cyclecounter() (which no longer exists).

Removed range checking of `cpu'.  It is always initialized to CPU_XXX
so it is less likely to be out of bounds than most variables.

clock.h:
Removed I586_CYCLECTR().  Use rdtsc() instead.

clock.c:
TIMER_FREQ is now a variable timer_freq that defaults to the old value of
TIMER_FREQ.  #define'ing TIMER_FREQ should still work and may be the best
way of setting the frequency.

Calibration involves counting cycles while watching the RTC for one second.
This gives values correct to within (a few ppm) + (the innaccuracy of the
RTC) on my systems.
1996-05-01 08:39:02 +00:00
Nate Williams
e597b4972e - add apm to the GENERIC kernel (disabled by default), and add some comments
regarding apm to LINT
- Disabled the statistics clock on machines which have an APM BIOS and
  have the options "APM_BROKEN_STATCLOCK" enabled (which is default
  in GENERIC now)
- move around some of the code in clock.c dealing with the rtc to make
  it more obvios the effects of disabling the statistics clock

Reviewed by:	bde
1996-04-22 19:40:28 +00:00
Andrey A. Chernov
2cb9219c5d Fix adjkerntz expression priority 1996-04-05 18:56:10 +00:00
Andrey A. Chernov
fe0d5f43c5 Add wall_cmos_clock sysctl variable, needed to manage adjkerntz even for
UTC cmos clocks (needed for Local Timezone FSes)
1996-04-05 03:36:31 +00:00
Bruce Evans
ef9805a3c8 Moved rtcin() to clock.c.
Always delay using one inb(0x84) after each i/o in rtcin() - don't
do this conditional on the bogus option DUMMY_NOPS not being defined.
If you want an optionally slightly faster rtcin() again, then inline
it and use a better named option or sysctl variable.  It only needs
to be fast in rtcintr().
1996-03-31 04:05:36 +00:00
Nate Williams
cdf642d171 Whoops, back out the last commit, which was accidentally committed at
the same time as the if_zp cleanup patch.

The commit that occurred was an incomplete patch for APM on my laptop
and needs more work.
1996-03-23 21:36:03 +00:00
Nate Williams
ada00a4447 Now that ac->ac_ipaddr and arpwhohas() no longer exist, remove the
ifdef'd out code that used it.
1996-03-23 21:32:39 +00:00
Garrett Wollman
3addba4f55 No longer use the cyclecounter to attempt to correct for late or missed
clock interrupts.

Keep a 1-in-16 smoothed average of the length of each tick.  If the
CPU speed is correctly diagnosed, this should give experienced users
enough information to figure out a more suitable value for `tick'.
1996-01-30 18:56:47 +00:00
Andrey A. Chernov
d85314fa5f Since new bcd* macros not argument range overflow resistant,
fix argument overflow for years >= 2000
1996-01-16 06:35:40 +00:00
Poul-Henning Kamp
3eb50b2edd My wife is busy making me a new conical hat, so you don't need to
send any to me this time.  Commited an old copy of this files where
the tables were swapped.  Duh!.
1996-01-15 21:26:43 +00:00
Poul-Henning Kamp
e95fbcfeb4 Soren called an said that I screwed up badly, so I backup until
I find out how... Sorry.
1996-01-15 21:12:50 +00:00
Poul-Henning Kamp
2898c294f4 Make bin2bcd and bcd2bin global macroes instead of having local
implementations all over the place.
1996-01-15 10:28:44 +00:00
Bruce Evans
f668341de4 Fixed handling of Feb 29 in resettodr(). 1996-01-12 17:33:12 +00:00
Andrey A. Chernov
dc3f9062ca Replace ugly year/month calculations in resettodr to more clean
variants, idea taken from NetBSD clock.c.
At least year calculation was wrong, pointed by Bruce.
Use different strategy to store year for BIOS without RTC_CENTURY
1996-01-08 18:50:14 +00:00
Garrett Wollman
0e41ee3037 Convert DDB to new-style option. 1996-01-04 21:13:23 +00:00
David Greenman
6410f76727 Add Pentium Pro CPU detection and special handling. For now, all the
optimizations we have for 586s also apply to 686s...this will be fine-
tuned in the future as appropriate.
1995-12-24 08:10:52 +00:00
Garrett Wollman
a8178e4bb6 Increase Pentium cyclecounter calibration time to 131072 us. This
experimentally seems to give better results on my machine.
1995-12-20 20:57:33 +00:00
Bruce Evans
d14122ea44 Fixed staticization of DDB functions. 1995-12-14 23:01:51 +00:00
Poul-Henning Kamp
6f4e0beb7e Staticize and cleanup. 1995-12-10 13:40:44 +00:00
Garrett Wollman
9350db19e7 Fix Pentium CPU rate diagnosis:
- Don't print out meaningless iCOMP numbers, those are for droids.
	- Use a shorter wait to determine clock rate to avoid deficiencies
	  in DELAY().
	- Use a fixed-point representation with 8 bits of fraction to store
	  the rate and rationalize the variable name.  It would be
	  possible to use even more fraction if it turns out to be
	  worthwhile (I rather doubt it).

The question of source code arrangement remains unaddressed.
1995-11-29 19:57:22 +00:00
Poul-Henning Kamp
4ccc87c594 Remove unused functions and variables, make things static, and other cleanups. 1995-10-28 15:39:31 +00:00
Garrett Wollman
e2d4b1f051 Reduce jitter of Pentium microtime() implementation by letting the counter
free-run and doing a subtract in microtime() rather than resetting the
counter to zero at every clock tick.  In combination with the changes to
kern_clock.c, this should eliminate all the immediately obvious sources
of systematic jitter in timekeeping on Pentium machines.
1995-10-12 20:39:49 +00:00
Bruce Evans
b2c4393679 Remove extra args from the calls to getit(). The bug was benign with the
default function call convention.
1995-08-25 19:24:56 +00:00
Rodney W. Grimes
d3628763db Merge RELENG_2_0_5 into HEAD 1995-06-11 19:33:05 +00:00
Rodney W. Grimes
9b2e535452 Remove trailing whitespace. 1995-05-30 08:16:23 +00:00
Bruce Evans
d81fba0cda Add variable `idelayed' and macros setdelayed() and schedsofttty()
to access it.  setdelayed() actually ORs the bits in `idelayed' into
`ipending' and clears `idelayed'.

Call setdelayed() every (normal) clock tick to convert delayed
interrupts into pending ones.

Drivers can set bits in `idelayed' at any time to schedule an interrupt
at the next clock tick.  This is more efficient than calling timeout().
Currently only software interrupts can be scheduled.
1995-05-11 07:44:40 +00:00
Bruce Evans
b5e8ce9f12 Add and move declarations to fix all of the warnings from `gcc -Wimplicit'
(except in netccitt, netiso and netns) and most of the warnings from
`gcc -Wnested-externs'.  Fix all the bugs found.  There were no serious
ones.
1995-03-16 18:17:34 +00:00
Andreas Schulz
c82762a9c3 Submitted by: Bruce Evans
Put in the much shorter and cleaner version for the calibrate_cycle_counter
for the Pentium that Bruce suggested. Tested here on my Pentium  and
it works okay.
1995-01-19 22:05:27 +00:00
Andreas Schulz
a9700525d8 Work around a compiler bug in gcc2.6.3 in handling (long long) variables and
shifting. Also correct the original code as Garrett noticed it in mail.
Leave the mishandled code in to use it later if future versions of gcc
are correct. The code was part of the calibrate_cyclecounter routine to
get the speed of the pentium chip.
1995-01-07 17:26:35 +00:00
Bruce Evans
43469be308 icu.s:
Move definition of `stat_imask' to clock.c.

clock.c:
Rename `rtcmask' to `stat_imask' and export it.  Rename `clkmask' to
`clk_imask' for consistency.

Only calculate TIMER_DIV(hz) once.

Merge debugging and "garbage" code to produce debugging code and format the
output better.

Make writertc() static inline and use it everywhere.  Now all accesses to
the clock registers go through rtcin() and writertc().

Move rtc initialization to cpu_initclocks().

Merge enablertclock() with cpu_initclocks() and remove enablertclock().
The extra entry point was just a leftover from 1.1.5.
1994-12-30 12:43:35 +00:00
Andrey A. Chernov
b27a526947 Revision 1.6 fix was lost: don't write 0 to RTC_DIAG 1994-11-12 16:24:54 +00:00
Andrey A. Chernov
3b8f1cfc05 Use adjkerntz into inittodr too (for APM stuff) 1994-11-10 12:53:13 +00:00
Bruce Evans
a3b33372b9 Maintain a new variable `timer0_overflow_threshold' so that microtime()
doesn't have to calculate it every call.

Rename `timer0_prescale' to `timer0_prescaler_count' and maintain it
correctly.  Previously we lost a few 8253 cycles for every "prescaled"
clock interrupt, and the lossage grows rapidly at 16 KHz.  Now we
only lose a few cycles for every standard clock interrupt.

Rename `*_divisor' to `*_max_count'.

Do the calculation of TIMER_DIV(rate) only once instead of 3 times each
time the rate is changed.

Don't allow preposterously large interrupt rates.  Bug fixes elsewhere
should allow the system to survive rates that saturate the system, however.

Clean up declarations.

Include <machine/clock.h> to check our own declarations.
1994-11-05 23:55:07 +00:00
Stefan Eßer
8627141c50 BEWARE: Interface change of register_intr() !
Changed the fifth parameter to register_intr() from u_int mask into
u_int *maskptr in preparation for new features (shared interrupts and
removable devices, eg. for PCMCIA).
1994-10-25 22:35:12 +00:00
Andrey A. Chernov
fd34b8e78c Add disable_rtc_set variable to block resettodr() call, needed for
adjkerntz -i, per Bruce suggestion
1994-10-04 18:39:10 +00:00
Andrey A. Chernov
3bbe7b72df RTC_CENTURY usage ifdefed out by USE_RTC_CENTURY compile option,
pointed by Bruce
1994-10-04 13:59:44 +00:00
Søren Schmidt
336abda6cd Updated pcaudio.c to latest from 1.1.5.1
Enabled timer reprogramming in clock.c (this could use more work).

Obtained from: FreeBSD-1.1.5.1
1994-09-29 08:24:45 +00:00
Bruce Evans
7fecb8e845 Don't lose the RTC interrupt in resettodr(). 1994-09-20 21:20:46 +00:00
Andrey A. Chernov
7b915aa631 resettodr() implemented, inittodr() fixed
Submitted by: me & chris@gnome.co.uk
1994-09-20 00:31:07 +00:00
Bruce Evans
eb51e37703 Remove some unnecessary #includes.
Restore the simple leap year calculation as a macro and document it so
that it doesn't become complicated again.  The simple version works
for all leap years covered by 32-bit time_t's.  The complicated version
doesn't work for all leap years covered by 64-bit time_t's since among
other reasons, the solar system is not stable for long enough.

Fix declarations.

Nuke spinwait().
1994-09-18 23:08:56 +00:00
Garrett Wollman
3f31c649d1 Redo Kernel NTP PLL support, kernel side.
This code is mostly taken from the 1.1 port (which was in turn taken from
Dave Mills's kern.tar.Z example).  A few significant differences:

1) ntp_gettime() is now a MIB variable rather than a system call.  A few
fiddles are done in libc to make it behave the same.

2) mono_time does not participate in the PLL adjustments.

3) A new interface has been defined (in <machine/clock.h>) for doing
possibly machine-dependent things around the time of the clock update.
This is used in Pentium kernels to disable interrupts, set `time', and
reset the CPU cycle counter as quickly as possible to avoid jitter in
microtime().  Measurements show an apparent resolution of a bit more than
8.14usec, which is reasonable given system-call overhead.
1994-09-18 20:40:01 +00:00
Andrey A. Chernov
82a4cf2359 1. adjkerntz variable added for preparation to resettodr() implementation
2. Leap year calculations fixed
1994-09-14 23:09:06 +00:00
Garrett Wollman
f23b4c91c4 Fix up some sloppy coding practices:
- Delete redundant declarations.
- Add -Wredundant-declarations to Makefile.i386 so they don't come back.
- Delete sloppy COMMON-style declarations of uninitialized data in
  header files.
- Add a few prototypes.
- Clean up warnings resulting from the above.

NB: ioconf.c will still generate a redundant-declaration warning, which
is unavoidable unless somebody volunteers to make `config' smarter.
1994-08-18 22:36:09 +00:00
David Greenman
8912c0ed61 Bruce Evans' dynamic interrupt support.
/usr/src/sys/i386/isa/clock.c:
	o Garrett's statclock changes.
	o Wire xxxintr, not Vclk.
	o Wire using register_intr(), not setidt().

/usr/src/sys/i386/isa/icu.s:
	o Garrett's statclock changes.
	o Removed unused variable high_imask.
	o Fake int 8 for rtc as well as int 0 for clk.  Required for kernel
	  profiling with statclock, harmless otherwise.

/usr/src/sys/i386/isa/isa.c:
	o Allow isdp->id_irq and other things in *isdp to be changed by
	  probes.  Changing interrupts later requires direct calls to
	  register_intr() and unregister_intr() and more care.
	  ALLOW_CONFLICT_* is brought over from 1.1.5, except
	  ALLOW_CONFLICT_IRQ is not supported.  IRQ conflict checking is
	  delayed until after probing so that drivers can change the IRQ
	  to a free one; real conflicts require more cooperation between
	  drivers to handle.
	o Too many details to list.
	o This file requires splitting and a lot more work.

/usr/src/sys/i386/isa/isa_device.h:
	o Declare more things more completely.

/usr/src/sys/i386/isa/sio.c:
	o Prepare to register interrupt handlers as fast.

/usr/src/sys/i386/isa/vector.s:
	o Generate entry code for 16 fast interrupt handlers and 16 normal
	  interrupt handlers.  Changed some constants to variables:
	  # $unit is now intr_unit[intr].  Type is int.  Someday it should
	    be a cookie suitable for the handler (e.g., a struct com_s for
	    sio).
	  # $handler is now intr_handler[intr].
	  # intrcnt_actv[id_num] is now *intr_countp[intr].  The indirection
	    is required to get a contiguous range of counters for vmstat
	    and so that the drivers depend more in the driver than on the
	    interrupt number (drivers could take turns using an interrupt
	    and the counts would remain correct).  There is a separate
	    counter for each device and for each stray interrupt.  In
	    1.1.5, stray interrupt 7 clobbers the count for device 7 or
	    something worse if there is no device 7 :-(.
	  # mask is now intr_mask[intr] (was already indirect).
	 o Entry points are now _XintrI and _XfastintrI (I = intr = 0-15),
	   not _VdevU (U = unit).
	 o Removed BUILD_VECTORS stuff.  There's a trace of it left for
	   the string table for vmstat but config now generates the
	   string in one piece because nothing more is required.
	 o Removed old handling of stray interrupts and older comments
	   about it.

Submitted by:	 Bruce Evans
1994-08-18 05:09:36 +00:00
Garrett Wollman
8ea838500f Enable use of the RTC chip for the statistical clock. While this does
not provide the full accuracy of a randomized statistical clock, it does
provide greater accuracy than the previous method, while not significantly
increasing overhead.  It also provides profiling support at 1024 Hz.

You must re-compile config before making a new kernel, or you will end
up with unresolved symbols.

Reviewed uy:	Bruce evans said it worked for him.
1994-08-15 03:15:20 +00:00
Garrett Wollman
f540b1065a Change all #includes to follow the current Berkeley style. Some of these
``changes'' are actually not changes at all, but CVS sometimes has trouble
telling the difference.

This also includes support for second-directory compiles.  This is not
quite complete yet, as `config' doesn't yet do the right thing.  You can
still make it work trivially, however, by doing the following:

rm /sys/compile
mkdir /usr/obj/sys/compile
ln -s M-. /sys/compile
cd /sys/i386/conf
config MYKERNEL
cd ../../compile/MYKERNEL
ln -s /sys @
rm machine
ln -s @/i386/include machine
make depend
make
1994-08-13 03:50:34 +00:00
Garrett Wollman
fba73571bd For Pentium machines, use a faster version of microtime with 8 usec
resolution (can probably be improved somewhat).  Other machines take
a three-instruction hit if I586_CPU is defined, none otherwise.
1994-08-11 00:28:24 +00:00
Garrett Wollman
a4f90f4d45 Tell Pentium users their CPU speed. (More changes to make use of this
to come later.)
1994-08-10 23:28:33 +00:00
Rodney W. Grimes
26f9a76710 The big 4.4BSD Lite to FreeBSD 2.0.0 (Development) patch.
Reviewed by:	Rodney W. Grimes
Submitted by:	John Dyson and David Greenman
1994-05-25 09:21:21 +00:00
Søren Schmidt
bc36c8064b Update the reprogram timer stuff, now the frequency of timer 0
can only be changed at the "right" times. Accuracy should be
assured.
1994-05-02 09:41:24 +00:00
Garrett Wollman
9ad380ab4c Define new option, INACCURATE_MICROTIME_IS_OK. When this is defined,
the NTP kernel PLL is disabled, and acquire_timer0() is enabled, thus
opening the door for microtime() (and hence gettimeofday()) to return
bogus timestamps.  This option is necessary for the `pca' driver to
work, but is implemented to underscore the fact that accurate timekeeping
and the `pca' driver are incompatible at present.  If someone writes a version
of microtime() that works when the `pca' driver is being used, this can get
junked.
1994-04-23 21:39:18 +00:00
Søren Schmidt
5194771d25 New support for sharing the timers
acquire_timer / release_timer

Pulled in timer related functions from isa.c
1994-04-21 14:19:16 +00:00
David Greenman
102cfb5c3e At the suggestion of Bruce Evans, don't zero RTC diag register. Doing so
was causing problems for some machines.
1994-02-06 22:48:13 +00:00
Garrett Wollman
aaf08d94ca Make everything compile with -Wtraditional. Make it easier to distribute
a binary link-kit.  Make all non-optional options (pagers, procfs) standard,
and update LINT to reflect new symtab requirements.

NB: -Wtraditional will henceforth be forgotten.  This editing pass was
primarily intended to detect any constructions where the old code might
have been relying on traditional C semantics or syntax.  These were all
fixed, and the result of fixing some of them means that -Wall is now a
realistic possibility within a few weeks.
1993-12-19 00:55:01 +00:00
Garrett Wollman
381fe1aaf4 Make the LINT kernel compile with -W -Wreturn-type -Wcomment -Werror, and
add same (sans -Werror) to Makefile for future compilations.
1993-11-25 01:38:01 +00:00
Andrey A. Chernov
03d24cbca4 DST offset calculation removed, it is wrong in any case. 1993-11-04 01:56:31 +00:00
Rodney W. Grimes
6f78ca6026 Removed all patch kit headers, sccsid and rcsid strings, put $Id$ in, some
minor cleanup.  Added $Id$ to files that did not have any version info, etc
1993-10-16 13:48:52 +00:00