Commit Graph

491 Commits

Author SHA1 Message Date
Bruce Evans
68ba369606 Moved declarations related to copying and zeroing to the right place. 1999-01-08 16:29:59 +00:00
Kazutaka YOKOTA
2d15a1badc Move IO_PSMSIZE from kbdio.h to isa.h. I thought I did this a long time
ago...

While I am here, correct the values for IO_MDASIZE and IO_CGASIZE; they
should be 12 rather than 16.
1999-01-06 05:40:01 +00:00
Bruce Evans
407e5f394f Moved the declaration of another non-SMP variable into the non-SMP section. 1998-12-14 19:16:17 +00:00
Stephen McKay
2619394c7c Fix tabs that should have been spaces. Some were in kernel error messages. 1998-12-14 13:30:29 +00:00
Archie Cobbs
f1d19042b0 The "easy" fixes for compiling the kernel -Wunused: remove unreferenced static
and local variables, goto labels, and functions declared but not defined.
1998-12-07 21:58:50 +00:00
Archie Cobbs
2127f26023 Examine all occurrences of sprintf(), strcat(), and str[n]cpy()
for possible buffer overflow problems. Replaced most sprintf()'s
with snprintf(); for others cases, added terminating NUL bytes where
appropriate, replaced constants like "16" with sizeof(), etc.

These changes include several bug fixes, but most changes are for
maintainability's sake. Any instance where it wasn't "immediately
obvious" that a buffer overflow could not occur was made safer.

Reviewed by:	Bruce Evans <bde@zeta.org.au>
Reviewed by:	Matthew Dillon <dillon@apollo.backplane.com>
Reviewed by:	Mike Spengler <mks@networkcs.com>
1998-12-04 22:54:57 +00:00
Poul-Henning Kamp
5986967ee2 don't print '?' for ioaddr the device may legitimately not have an
ioaddr.
1998-11-29 15:42:40 +00:00
Poul-Henning Kamp
d259be02bc Update timecounters to new interface. 1998-10-23 10:46:20 +00:00
Bruce Evans
fe310de802 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
1998-10-22 05:58:45 +00:00
David Greenman
6cde7a165f Fixed two potentially serious classes of bugs:
1) The vnode pager wasn't properly tracking the file size due to
   "size" being page rounded in some cases and not in others.
   This sometimes resulted in corrupted files. First noticed by
   Terry Lambert.
   Fixed by changing the "size" pager_alloc parameter to be a 64bit
   byte value (as opposed to a 32bit page index) and changing the
   pagers and their callers to deal with this properly.
2) Fixed a bogus type cast in round_page() and trunc_page() that
   caused some 64bit offsets and sizes to be scrambled. Removing
   the cast required adding casts at a few dozen callers.
   There may be problems with other bogus casts in close-by
   macros. A quick check seemed to indicate that those were okay,
   however.
1998-10-13 08:24:45 +00:00
Bruce Evans
a4e195e166 Don't print conflict messages in haveseen_isadev() if CC_QUIET is
specified.  This makes haveseen_isadev() useful for searching for a
free resource.  This increases the bitrot in the pci RESOURCE_CHECK
code.

Fixed the pre-attach conflict message.  The flag for distinguishing
pre-attach conflict checks from pre-probe ones was never set.
1998-10-12 13:12:45 +00:00
Bruce Evans
6ed49410a5 Attempt to work around a bug in the previous commit related to
non-reentrancy of SMP clock locking.  Depend on the giant lock
protecting clkintr().
1998-09-20 19:56:28 +00:00
Bruce Evans
a6796db6ce Ensure that the i8254 timecounter doesn't go backards. It sometimes
went backwards when interrupts were masked for more than one i8254
interrupt period.  It sometimes went backwards when the i8254 counter
was reprogrammed.  Neither of these should happen in normal operation.

Update the i8254 timecounter support variables atomically.  Calling
timecounter functions from fast interrupt handlers may actually work
in all cases now.
1998-09-20 03:47:54 +00:00
Tor Egge
572d053e17 Maintain a mapping from irq number to (ioapic number, int pin) tuple,
and use this when masking/unmasking interrupts.

Maintain a mapping from (iopaic number, int pin) tuple to irq number,
and use this when configuring devices and programming the ioapics.

Previous code assumed that irq number was equal to int pin number, and
that the ioapic number was 0.

Don't let an AP enter _cpu_switch before all local apics are initialized.
1998-09-06 22:41:42 +00:00
Bruce Evans
92971f1fd7 Register tty software interrupt handlers at run time using register_swi()
instead of at compile time using ifdefs.

Use _swi_null instead of dummycamisr.  CAM and dpt should call
register_swi() instead of hacking on ihandlers[] directly.
1998-08-11 17:01:32 +00:00
Bruce Evans
18c5a6c435 Implemented dynamic registration of software interrupt handlers. Not
used yet.

Use dummy SWI handlers to avoid some checks for null pointers.
1998-08-11 15:08:13 +00:00
Bruce Evans
f2bd332e7c Stop physical DMA for the non-auto case in isa_dmadone(). This fixes a
small part of a bug suite beginning in the SLICE probes but mostly in the
floppy driver.  This is a quick fix: the auto case shouldn't be special;
DMA should also be stopped in isa_dma_release(); isa_dmastop() probably
shouldn't exist; common DMA registers should not be accessed without
locking.
1998-07-19 04:22:55 +00:00
Bruce Evans
be160d60ab Removed unused includes. 1998-06-21 18:02:50 +00:00
Bruce Evans
5a2ae61fec Converted isa_strayintr() to take a `void *' arg. 1998-06-18 16:08:46 +00:00
Bruce Evans
9a2daf9190 Changed the type of an isa/general interrupt handler to take a
`void *' arg.  Fixed or hid most of the resulting type mismatches.
Handlers can now be updated locally (except for reworking their
global declarations in isa_device.h).
1998-06-18 15:32:09 +00:00
Poul-Henning Kamp
a58f0f8e66 Add a tc_ prefix to struct timecounter members.
Urged by:	bde
1998-06-09 13:10:54 +00:00
Poul-Henning Kamp
48115288df Add a member function more to the timecounters, this one is for use
with latch based PPS implementations.  The client that uses it will
be committed after more testing.
1998-06-07 20:36:55 +00:00
Poul-Henning Kamp
dbb3475507 Add a "this" style argument and a "void *private" so timecounters can
figure out which instance to wount with.
1998-06-07 08:40:53 +00:00
Bruce Evans
cd55b8f46c Converted the ICU-level interrupt tests (3, 5 and 8) in sioprobe() into
a test of the irq number, and made failure of this test non-fatal.
Removed related unused complications for the APIC_IO case.  Removed the
no-test3 flag.

Deverbosified the failure messages for the other tests.  Removed the
per-port verbose flag - just use the general verbose flag.
1998-05-31 10:53:55 +00:00
Poul-Henning Kamp
e796e00de3 Some cleanups related to timecounters and weird ifdefs in <sys/time.h>.
Clean up (or if antipodic: down) some of the msgbuf stuff.

Use an inline function rather than a macro for timecounter delta.

Maintain process "on-cpu" time as 64 bits of microseconds to avoid
needless second rollover overhead.

Avoid calling microuptime the second time in mi_switch() if we do
not pass through _idle in cpu_switch()

This should reduce our context-switch overhead a bit, in particular
on pre-P5 and SMP systems.

WARNING:  Programs which muck about with struct proc in userland
will have to be fixed.

Reviewed, but found imperfect by:       bde
1998-05-28 09:30:28 +00:00
Poul-Henning Kamp
4b9afc97a7 Change a data type internal to the timecounters, and remove the "delta"
function.

Reviewed, but not entirely approved by: bde
1998-05-19 18:48:30 +00:00
Tor Egge
167a4d818c Use a higher priority interrupt vector for 8254 timer interrupts. 1998-05-17 21:15:18 +00:00
Bruce Evans
1696756396 Support compiling with `gcc -pedantic' (don't use hard newlines in
(asm) string constants or hard long long constants).
1998-04-19 15:39:26 +00:00
Dag-Erling Smørgrav
dc73342347 Seventy-odd "its" / "it's" typos in comments fixed as per kern/6108. 1998-04-17 22:37:19 +00:00
Bruce Evans
1d37f051c1 Finish supporting compiling with gcc -ansi'. Fix missing volatile's
in __asm() statements while I'm here.
1998-04-15 18:58:09 +00:00
Peter Wemm
fa1ef19485 remove #ifdef declaration of npxproc, use globals.s and the extern always. 1998-04-06 15:50:29 +00:00
Tor Egge
c547ef5cd4 Remove some unneeded statements that enabled interrupts. 1998-04-05 01:04:48 +00:00
Poul-Henning Kamp
227ee8a188 Eradicate the variable "time" from the kernel, using various measures.
"time" wasn't a atomic variable, so splfoo() protection were needed
around any access to it, unless you just wanted the seconds part.

Most uses of time.tv_sec now uses the new variable time_second instead.

gettime() changed to getmicrotime(0.

Remove a couple of unneeded splfoo() protections, the new getmicrotime()
is atomic, (until Bruce sets a breakpoint in it).

A couple of places needed random data, so use read_random() instead
of mucking about with time which isn't random.

Add a new nfs_curusec() function.

Mark a couple of bogosities involving the now disappeard time variable.

Update ffs_update() to avoid the weird "== &time" checks, by fixing the
one remaining call that passwd &time as args.

Change profiling in ncr.c to use ticks instead of time.  Resolution is
the same.

Add new function "tvtohz()" to avoid the bogus "splfoo(), add time, call
hzto() which subtracts time" sequences.

Reviewed by:	bde
1998-03-30 09:56:58 +00:00
Poul-Henning Kamp
7ab95d0bab Be less draconian about the TSC if APM is configured, use it for
timecounting if APM-BIOS isn't found.
Be just as draconian about SMP as always, but explain it better.
1998-03-16 10:06:58 +00:00
Tor Egge
c555a715f5 On SMP systems, initially follow the MP spec with regard to which pin
on the IOAPIC being connected to the 8254 timer interrupt.
Verify that timer interrupts are delivered. If they aren't, attempt
a fallback to mixed mode (i.e. routing the timer interrupt via the 8259 PIC).
1998-03-14 03:11:50 +00:00
Tor Egge
5dd528cd4e Remove special handling for resuming clock interrupt when using APIC_IO.
The `generic' vector stubs do the right thing.
1998-03-05 21:45:53 +00:00
Tor Egge
02c1dc3bbc When entering the apic version of slow interrupt handler, level
interrupts are masked, and EOI is sent iff the corresponding ISR bit
is set in the local apic. If the CPU cannot obtain the interrupt
service lock (currently the global kernel lock) the interrupt is
forwarded to the CPU holding that lock.

Clock interrupts now have higher priority than other slow interrupts.
1998-03-03 22:56:30 +00:00
Tor Egge
3163861c7b Forward the signal if the process runs on a different CPU. This reduces
the signal handling latency for cpu-bound processes that performs very
few system calls.

The IPI for forcing an additional software trap is no longer dependent upon
BETTER_CLOCK being defined.
1998-03-03 20:55:26 +00:00
Poul-Henning Kamp
3301c800f5 Prevent the TSC from being used on APM machines, we have no idea if
it runs at a constant frequency.  This was less of an issue before,
because the TSC only interpolated in the HZ intervals, but now where
the timecounter is used all the way, this becomes much more visible.

Nit: Fix a printf which triggered the bde-filter.
1998-02-28 21:16:13 +00:00
Bruce Evans
168be6199e Quick fix for the i8254 timecounter often gaining 10 msec. 1998-02-23 00:11:25 +00:00
Jordan K. Hubbard
6bf2dcfc50 Add missing CLOCK_UNLOCK() before write_eflags().
Submitted by:	dave adkins <adkin003@tc.umn.edu>
1998-02-21 20:45:27 +00:00
Poul-Henning Kamp
7ec73f6417 Replace TOD clock code with more systematic approach.
Highlights:
    * Simple model for underlying hardware.
    * Hardware basis for timekeeping can be changed on the fly.
    * Only one hardware clock responsible for TOD keeping.
    * Provides a real nanotime() function.
    * Time granularity: .232E-18 seconds.
    * Frequency granularity:  .238E-12 s/s
    * Frequency adjustment is continuous in time.
    * Less overhead for frequency adjustment.
    * Improves xntpd performance.

Reviewed by:    bde, bde, bde
1998-02-20 16:36:17 +00:00
Bruce Evans
ee10b2a475 Removed a superstitious fnop() that broke the usefulness of the FPU's
"last instruction" pointer.
1998-02-15 06:25:26 +00:00
Bruce Evans
359888780e Ifdefed SMP-only declarations. 1998-02-13 06:59:22 +00:00
Bruce Evans
1d804e7925 Update timer0_prescaler_count before calling hardclock() while timer0
is "acquired".  This fixes a TSC biasing error of about 10 msec when
pcaudio is active.

Update `time' before calling hardclock() when timer0 is being released.
This is not known to be important.

Added some delays in writertc().  Efficiency is not critical here, unlike
in rtcin(), and we already use conservative delays there.

Don't touch the hardware when machdep.i8254_freq is being changed but
the maximum count wouldn't change.  This fixes jitter of up to 10 msec
for most small adjustments to machdep.i8254_freq.  When the maximum
count needs to change, the hardware should be adjusted more carefully.
1998-02-13 06:33:16 +00:00
Bruce Evans
cd59d49d07 Only use the i586-optimized copying and zeroing functions if they are
actually faster (more than 20% faster for zeroing 1 MB at boot time).
This fixes pessimized copying and zeroing on K6's and perhaps on other
CPUs that are misclassified as i586's.
1998-02-12 21:41:10 +00:00
Eivind Eklund
303b270b0a Staticize. 1998-02-09 06:11:36 +00:00
Eivind Eklund
0b08f5f737 Back out DIAGNOSTIC changes. 1998-02-06 12:14:30 +00:00
Eivind Eklund
47cfdb166d Turn DIAGNOSTIC into a new-style option. 1998-02-04 22:34:03 +00:00
Eivind Eklund
3f2076daf5 Make the debug options new-style.
This also zaps a DPT option from lint; it wasn't referenced from
anywhere.
1998-01-31 07:23:16 +00:00
Eivind Eklund
828084926f Skip probing devices which have already probed true. 1998-01-31 03:29:00 +00:00
Poul-Henning Kamp
53dd848c82 APM calls inittodr(0) which is stupid, but at least stop setting the
clock back to when Dennis had a good idea.
1998-01-28 10:41:33 +00:00
Justin T. Gibbs
99117bb6ec Addition of splsoftvm and a VM SWI to handle bus dma related callbacks.
This SWI may be useful for other, defered, VM tasks.
1998-01-15 07:34:01 +00:00
Bruce Evans
82d86d3750 Moved the SMP declarations of INTREN() and INTRDIS() to the correct header,
i.e., the same header as corresponding non-SMP #defines.
1998-01-01 08:47:17 +00:00
Poul-Henning Kamp
0f12aa9ffd More cleanup relating to our use of the TSC.
Look in the cpu_feature (CPUID output) to see if we have it.
1997-12-28 17:33:10 +00:00
Poul-Henning Kamp
d46e059f94 wash, sort and put in order various nits from the i586_ctr -> tsc
commit.

Pointed out by: bde
1997-12-28 13:36:09 +00:00
Poul-Henning Kamp
71f461f86a Rename "i586_ctr" to "tsc" (both upper and lower case instances).
Fix a couple of printfs too.

Warning: This changes the names of a couple of kernel options!
1997-12-26 20:42:37 +00:00
Steve Passe
baf41202ca The improvements to clock statistics by Tor Egge
Wrappered and enabled by the define BETTER_CLOCK (on by default in smpyests.h)

apic_vector.s also contains a small change I (smp) made to eliminate
the double level INT problem.  It seems stable, but I haven't the tools
in place to prove it fixes the problem.

Reviewed by:	smp@csn.net
Submitted by:	Tor Egge <Tor.Egge@idi.ntnu.no>
1997-12-08 22:59:39 +00:00
John-Mark Gurney
857c08d17c fix a few style nites...
make isa_dmacascade, isa_dmastart, isa_dmadone, and find_isadev MUCH
easier to be found by starting them at the beginging of the line...

remove braces inside of ifdef RESOURCE_CHECK... found by % in vi...
1997-11-30 09:44:28 +00:00
Bruce Evans
cc8ae84672 Moved splhigh()/spl0() calls from isa_configure() to configure() so that
there is a natural place to initialize `safepri' in a future commit.
Spinoffs:
- spl0() gets called in the unlikely event that isa is not configured.
- configure() has better control over enabling interrupts.
- it is now less unclear that interrupts aren't actually enabled early.
  Rev.1.48 of autoconf.c seems to have done the opposite of what was
  intended - moving the isa_configure() call delayed the spl0() side
  effect.
Added some comments about the bogons.  Removed the splhigh() call since
it is a no-op.
1997-11-21 18:14:02 +00:00
Bruce Evans
e0605ebd12 Removed an unused #included.
Ifdefed #includes that are not used in the SMP case.
1997-11-18 11:32:31 +00:00
Bruce Evans
41d022ae9c Removed #unused includes.
Added a used #include (don't depend on yet to be fixed namespace pollution).
1997-11-18 11:16:56 +00:00
Bruce Evans
7f47cf2f4a Don't include <machine/cputypes.h> or declare cputype/class interfaces
in <machine/cpu.h>.  Moved the declarations to <machine/cputypes.h>.
Fixed style bugs in the moved code.  Fixed everything that depended on
the nested include.  Don't include <machine/cpu.h> (in the changed files)
unless something in it is used directly.
1997-10-28 11:43:57 +00:00
Jordan K. Hubbard
02630e3d73 Allow "foo0: disabled, not probed" message to stay, but make it conditional
on bootverbose so that those who _really wanna know_ still can.
Compromise suggested by:	joerg
1997-10-12 08:31:41 +00:00
Justin T. Gibbs
643b3d0cf2 Fix a serious bug I introduced while adding in support for CAM interrupts.
It seems I didn't count my 0's properly when adding the new masks into
icu_vector.s pushing SWI_AST_MASK off the end of the array and screwing
up the indexing for SWI_CLOCK_MASK.

Fix the bug icu_vector.s and also reformat the code in both icu_vector.s and
apic_vector.s so that it will be much harder to make the same mistake in
the future.

Submitted by:	Bruce Evans <bde@zeta.org.au>
1997-09-28 19:30:01 +00:00
Stephen McKay
a2575e01e8 Add a small hack to support the strange antics of the Unisys ELI 4003. This
machine generates an NMI for each floating point error, just like an old XT.
Since it is ISA only, reading the EISA status port yields 0xff, which would
give a spurious EISA panic.  The simplest thing to do is to ignore the 0xff.
1997-09-28 15:48:34 +00:00
Justin T. Gibbs
02a199102d aha1542.c aic6360.c cy.c fd.c ft.c
if_ie.c if_wl.c if_zp.c isa.c isa_device.h
labpc.c mcd.c ncr5380.c scd.c seagate.c si.c
sio.c tw.c ultra14f.c wcd.c wd.c:

	Update for changes in the callout interface.

apic_vector.s icu_vector.s ipl.s ipl_funcs.c:

	Add CAM software/hardware interrupt support.
1997-09-21 21:41:49 +00:00
John-Mark Gurney
77509afdf3 teach pnp to keep isa_device structs around, and teach isa.c how to scan
these structs for conflics...

it still exist that two PnP cards can colide, but this is up to the user
to make sure it doesn't happen...

other modifications to pnp.c to format output properly, and hide more
output behind bootverbose flag...

fix some bugons in pnp.h that would of made it difficult for inclusion
in external programs (for import of pnpinfo)
1997-09-19 15:20:25 +00:00
Peter Wemm
421f9ee1ef Change an assemble-time divide into a shift. Under binutils-2.8 gas in elf
mode, the slash is a comment leader, while under non-elf it is a divide
symbol (what a concept! :-).  Theoretically, #APP/#NO_APP can change this
but that doesn't seem to mesh too well with macros and line continuation.
1997-09-08 06:40:58 +00:00
Steve Passe
010e669615 Removed the "globl" nature of the vec array. This was left over from the
time when icu.s was common between UP and SMP.  It is not necessary for UP
and thus can be removed from icu_ipl.s.
1997-09-02 19:40:13 +00:00
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
Steve Passe
34162fc615 Support for the new FAST_HI algorithm, enabled.
Preliminary support for the INTR_SIMPLELOCK algorithm, disabled.
Note that this code is NOT ready.
1997-08-29 18:45:23 +00:00
Mike Smith
67fb1e6a0c Here is a patch to alleviate the current problem with the dma interface
and the sound driver which uses auto dma.

The  dma interface functionality remains however it now checks
to see if a dma is operating in auto dma mode and if so it bypasses
the busy flag check . I have modified the sound driver 3.5  to
adjust for this new behavior and tested it under FreeBSD 3.0 -current

This patch also includes the new function isa_dmastop.

Submitted by:	Amancio Hasty <hasty@rah.star-gate.com>
1997-08-28 03:36:40 +00:00
Bruce Evans
ccea0a158a Check for irq conflicts even if conflicts are allowed. Conflicting
irqs can't work (at best, the first one attached wins).  It used to
be necessary to skip this check because of bogus irqs in the sound
drivers, but the sound drivers have been fixed, except possibly the
OSS ones.
1997-08-25 22:52:59 +00:00
Steve Passe
886e789627 The last of the encapsolation of cpl/spl/ipending things into a critical
region protected by the simplelock 'cpl_lock'.

Notes:

 - this code is currently controlled on a section by section basis with
   defines in machine/param.h.  All sections are currently enabled.

 - this code is not as clean as I would like, but that can wait till later.

 - the "giant lock" still surrounds most instances of this "cpl region".
   I still have to do the code that arbitrates setting cpl between the
   top and bottom halves of the kernel.

 - the possibility of deadlock exists, I am committing the code at this
   point so as to exercise it and detect any such cases B4 the "giant lock"
   is removed.
1997-08-24 00:05:37 +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
Philippe Charnier
40d5099441 Revert my previous commit about using CS_SECURE macro.
Requested by:	Bruce.
1997-08-21 06:33:04 +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
Philippe Charnier
15f3549108 Use CS_SECURE macro.
Reviewed by:	John Dyson
1997-08-18 06:58:59 +00:00
Steve Price
1393383a2e Add parentheses because == has higher precedence than &.
PR:		i386/4225
Submitted by:	Frank MacLachlan <fpm@n2.net>
1997-08-13 02:40:06 +00:00
John Dyson
48a09cf276 VM86 kernel support.
Work done by BSDI, Jonathan Lemon <jlemon@americantv.com>,
	Mike Smith <msmith@gsoft.com.au>, Sean Eric Fagan <sef@kithrup.com>,
	and probably alot of others.
Submitted by:	Jnathan Lemon <jlemon@americantv.com>
1997-08-09 00:04:06 +00:00
Mike Smith
84685adb57 Return to using disable/enable_intr() for guarding DMA register access.
Mask the read value from the count register in order to return zero correctly
after TC, as per intel datasheet : "If it is not autoinitialised, this
register will have a count of FFFFH after TC"
1997-07-29 05:24:36 +00:00
Mike Smith
f5f607a03e Pedant attack! Use variable names consistent with discourse in
comments.  Remove reduntant extra addition that was unncessary, and
unneeded mask (asuming inb works correctly).

Submitted by:	Stephen McKay <syssgm@dtir.qld.gov.au>
1997-07-28 09:13:11 +00:00
Mike Smith
53f83ec34c Use disable_intr() / read/write_eflags() to ensure that interrupt
handlers don't skew the results of isa_dmastatus.  The function can be
safely called with interrupts disabled.

Submitted by:	Stephen McKay <syssgm@dtir.qld.gov.au>
1997-07-28 07:49:40 +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
Mike Smith
a4453045b0 Add isa_dmastatus() for reading the current ISA DMA counter for a
given channel.

Submitted by:	luigi@labinfo.iet.unipi.it (Luigi Rizzo)
1997-07-24 05:27:40 +00:00
Steve Passe
7f6ab10763 Removed the defunct GET_MPLOCK/REL_MPLOCK macros.
These are no-ops for UP, and should have been removed when vector.s
was split into UP and SMP subsets.
1997-07-24 03:24:57 +00:00
Steve Passe
87a6f31089 Last commit didn't take, operator error??? 1997-07-22 20:12:32 +00:00
Steve Passe
e94493547b Disabled 2 static inlines:
- INTRGET()
 - INTRSET()

These were only used in if_ze.c (already removed) and npx.c.  The code
in npx.c has also been cleaned of all APIC code.
1997-07-21 08:20:07 +00:00
Steve Passe
3902c3ef1f Made the SMP case ignore the possibility of an INT13 interface.
This eliminates all the APIC code, and thus several routines that
would otherwise need to be made MP-safe.

Reviewed by:	 Bruce Evans <bde@zeta.org.au>
1997-07-21 07:57:50 +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
d2ecb616f2 Split TEST_CPUSTOP code into CPUSTOP_ON_DDBBREAK and mainline code. 1997-07-18 21:27:53 +00:00
Steve Passe
7bbd2262eb Made the printing of the APIC INTs depend on bootverbose. 1997-07-18 03:59:28 +00:00
Peter Wemm
5611a020da Remove the disable for the P5 cpu class bcopy using the FPU on SMP kernels,
it is understood to work now (and has been for quite a while apparently).
1997-07-17 02:09:25 +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
Andrey A. Chernov
d80e841377 Back out my changes with 'conflicts' keyword for IRQs,
sounddriver fixed now.
1997-07-09 17:58:16 +00:00
Steve Passe
01bd6212ca Added a hook for a "spurious INTerrupt handler". 1997-07-06 22:11:26 +00:00
Steve Passe
58db75841d apic_vector.s:
- added Xcpustop IPI code to support stop_cpus()/restart_cpus().
   it is off by default, enable via smptests.h:TEST_CPUSTOP

intr_machdep.h:
 - moved +ICULEN to lower level.
 - added entry for Xcpustop.
1997-06-27 23:48:05 +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
Peter Wemm
b3196e4b9f Preliminary support for per-cpu data pages.
This eliminates a lot of #ifdef SMP type code.  Things like _curproc reside
in a data page that is unique on each cpu, eliminating the expensive macros
like:    #define curproc (SMPcurproc[cpunumber()])

There are some unresolved bootstrap and address space sharing issues at
present, but Steve is waiting on this for other work.  There is still some
strictly temporary code present that isn't exactly pretty.

This is part of a larger change that has run into some bumps, this part is
standalone so it should be safe.  The temporary code goes away when the
full idle cpu support is finished.

Reviewed by: fsmp, dyson
1997-06-22 16:04:22 +00:00
Andrey A. Chernov
833bdc932c While deciding to install irq with unneded "conflicts" keyword,
additionly check that intr vector is non-NULL
1997-06-09 00:53:48 +00:00
Andrey A. Chernov
7f533ff73f Add safety check in case "conflicts" keyword specified more times than
needed
1997-06-08 17:15:31 +00:00
Andrey A. Chernov
1886f4968c Make "conflicts" keyword work again 1997-06-08 16:43:37 +00:00
KATO Takenori
40b2de1758 Added PC-98 code. 1997-06-02 15:28:10 +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
0589fe3b6e The SWI_NET_MASK and SWI_TTY_MASK handlers are now back adjacent to the
top of the hardware interrupt handlers.  Apparently this is slightly
faster with the bit scanning instruction that looks these up - this set of
changes reverts the original change.

Reviewed by: bde
1997-05-31 08:59:51 +00:00
Steve Passe
4fd20a6b2a Added code to manage the local and io APICs as structures. 1997-05-29 05:56:12 +00:00
Peter Wemm
7a14de6260 No longer need opt_smp.h here 1997-05-29 05:00:35 +00:00
Peter Wemm
ecf8148761 remove opt_smp.h from this well-included file, minor style police 1997-05-29 04:58:04 +00:00
Peter Wemm
6b19c20ba5 remove opt_smp.h, minor style police 1997-05-29 04:55:39 +00:00
Steve Passe
81c1993f87 Split vector.s into UP and SMP specific files:
- vector.s		<- stub called by i386/exception.s
 - icu_vector.s		<- UP
 - apic_vector.s	<- SMP

Split icu.s into UP and SMP specific files:
 - ipl.s		<- stub called by i386/exception.s (formerly icu.s)
 - icu_ipl.s		<- UP
 - apic_ipl.s		<- SMP

This was done in preparation for massive changes to the SMP INTerrupt
mechanisms.  More fine tuning, such as merging ipl.s into exception.s,
may be appropriate.
1997-05-26 17:58:27 +00:00
Stefan Eßer
4c9340d45c Add support for shared interrupts to the kernel. This code is meant
be (eventually) architecture independent. It provides an emulation
of the ISA interrupt registration function register_intr(), but that
function does no longer manipulated the interrupt controller and
interrupt descriptor table, but calls the architecture dependent
function setup_icu() for that purpose.

After the ISA/EISA bus code has been modified to directly call the new
interrupt registartion functions (intr_create() and intr_connect()),
the emulation of register_intr() should be dropped.

The C level interrupt handler function should take a (void*) argument,
and the function pointer type (inthand2_t) should defined in some  other
place than isa_device.h.

This commit is a pre-requisite for the removal of the PCI specific shared
interrupt code.

Reviewed by:    dfr,bde
1997-05-26 14:42:24 +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
06884fd04e remove now redundant (struct trapframe *) cast 1997-05-07 19:58:13 +00:00
Steve Passe
08896efb1a Code to handle SMP/APIC_IO mapping of ISA INTs to APIC pins above IRQ15.
- doesn't break my system.
 - NOT yet verified on the affected motherboard.

Stifle an annoying dma_start busy message for the sound cards.

Submitted by:	"John S. Dyson" <toor@dyson.iquest.net>
1997-05-05 22:56:13 +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
176c49e057 Use a common numbering of the tty and net software interrupt levels
between the SMP and non-SMP case.  It simplifies the #ifdef's, since
NHWI changes (at least for the moment) when APIC's are involved.
1997-04-29 20:05:48 +00:00
Steve Passe
f50a491f78 removed TEST_CPUHITS code.
replaced push/pop of %ds with use of 'ss' prefix in Xinvltlb.

Submitted by:	 Bruce Evans <bde@zeta.org.au>
1997-04-28 01:47:55 +00:00
Steve Passe
34e63b4cd7 removed all the TEST_UPPERPRIO crud. 1997-04-28 01:08:47 +00:00
Steve Passe
296bffc9c0 informal discussion between Bruce Evans <bde@zeta.org.au>,
Peter Wemm <peter@spinner.DIALix.COM>, Steve Passe <smp@csn.net>

removed all the IPI_INTS code.
made the XFAST_IPI32 code default, renaming Xfastipi32 to Xinvltlb.
cleanup of i386/isa/isa_device.h to eliminate SMP dependancies:
  made the id_irq member of struct isa_device an u_int.
  made the id_drq member of struct isa_device an int.
  removed all other '#ifdefs' concerning SMP & APIC_IO.
removed SMP/APIC_IO dependancies from if_ze.c.
1997-04-27 21:18:59 +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
John Polstra
9081eec1fb Make the necessary changes so that an ELF kernel can be built. I
have successfully built, booted, and run a number of different ELF
kernel configurations, including GENERIC.  LINT also builds and
links cleanly, though I have not tried to boot it.

The impact on developers is virtually nil, except for two things.
All linker sets that might possibly be present in the kernel must be
listed in "sys/i386/i386/setdefs.h".  And all C symbols that are
also referenced from assembly language code must be listed in
"sys/i386/include/asnames.h".  It so happens that failure to do
these things will have no impact on the a.out kernel.  But it will
break the build of the ELF kernel.

The ELF bootloader works, but it is not ready to commit quite yet.
1997-04-22 06:55:47 +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
Andrey A. Chernov
e5df661c83 Remove recently commited support for iobase == -2 ("port none")
is is really probe routine task (return -1 for no ports)
1997-03-28 01:02:17 +00:00
Andrey A. Chernov
e4960ae4f5 Replace more verbose "at <not configured>" with less verbose "at ?",
we don't need much attention here, because this diagnostic printed first
and then card will be configured.
1997-03-25 03:29:40 +00:00
Andrey A. Chernov
70b57d05df Follow config intention for iobase:
print "at <not configured>" for iobase == -1 (autodetect not happens)
and not print anything for iobase == -2 (none)
Old code treat this two special config numbers as big port numbers.
1997-03-25 03:13:05 +00:00
Bruce Evans
fce002fdef Don't include <sys/ioctl.h> in the kernel. Stage 1: don't include
it when it is not used.  In most cases, the reasons for including it
went away when the special ioctl headers became self-sufficient.
1997-03-24 11:25:10 +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
26add14927 Disabled logging of masked exceptions on exit. Keep the side effect of
saving the state (see rev.1.17).
1997-01-29 13:46:28 +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
Nate Williams
7323d74ac0 Changed magic # 0xa0000 -> ISA_HOLE_START since it's now defined. 1997-01-08 05:56:55 +00:00
Bruce Evans
639cfb9f88 Reenabled i586_optimized_copyin/out yet again. 1997-01-04 13:57:17 +00:00
Bruce Evans
5a9c69e7af Disabled i586-optimized copyin and copyout again. The fault handler
is still broken - it doesn't restore the floating point state.

2.2-BETA users should disable it using npx0 flags 0x04 the same as
2.2-ALPHA users should have.
1996-12-28 12:19:25 +00:00
Bruce Evans
4cea724a81 Reenabled i586-optimized copyin/out.
Should be in 2.2.  Don't put it there for a while.
1996-11-30 14:08:44 +00:00
Bruce Evans
f020427513 Disabled i586-optimized copyin and copyout. They usually panic if the
user supplies a bad address, because they push a lot of stuff that the
fault handler doesn't know about onto the stack.  This has been broken
for more than half a year despite being tested for almost half a year
in -current.
1996-11-15 20:27:14 +00:00
Bruce Evans
1fe048505d Replaced I586_OPTIMIZED_BCOPY and I586_OPTIMIZED_BZERO with boot-time
negative-logic flags (flags 0x01 and 0x02 for npx0, defaulting to unset = on).
This changes the default from off to on.  The options have been in current
for several months with no problems reported.

Added a boot-time negative-logic flag for the old I5886_FAST_BCOPY option
which went away too soon (flag 0x04 for npx0, defaulting to unset = on).

Added a boot-time way to set the memory size (iosiz in config, iosize in
userconfig for npx0).

LINT:
Removed old options.  Documented npx0's flags and iosiz.

options.i386:
Removed old options.

identcpu.c:
Don't set the function pointers here.  Setting them has to be delayed
until after userconfig has had a chance to disable them and until after
a good npx0 has been detected.

machdep.c:
Use npx0's iosize instead of MAXMEM if it is nonzero.

support.s:
Added vectors and glue code for copyin() and copyout().
Fixed ifdefs for i586_bzero().
Added ifdefs for i586_bcopy().

npx.c:
Set the function pointers here.
Clear hw_float when an npx exists but is too broken to use.
Restored style from a year or three ago in npxattach().
1996-11-11 20:39:03 +00:00
Bruce Evans
94ca32a3f5 Don't switch from fast interrupt handlers to normal interrupt
handlers if interrupts are nested more than a few (3) deep.  This
only reduces the maximum nesting level by 1 with the standard
drivers unless there is a related bug somewhere, but can't hurt
much (the worst case is returning to hoggish interrupt handler like
wdintr(), but such interrupt handlers hurt anyway).

Fixed a previously harmless race incrementing the interrupt nesting
level.

This should be in 2.1.6 and 2.2.
1996-11-07 03:05:27 +00:00
Bruce Evans
a01024e023 Count only hardware interrupts in cnt.v_intr, so that the individual
hardware interrupt counts add up to the total.  Previously, software
interrupts generated by splz() were counted in the total.  These
software interrupts seem to be very rare - there have apparently been
0 of them on freefall among the last 352448857 interrupts.
1996-11-06 17:02:38 +00:00
Satoshi Asami
e30f001135 More merge and update.
(1) deleted #if 0

    pc98/pc98/mse.c

(2) hold per-unit I/O ports in ed_softc

    pc98/pc98/if_ed.c
    pc98/pc98/if_ed98.h

(3) merge more files by segregating changes into headers.

  new file (moved from pc98/pc98):

    i386/isa/aic_98.h

  deleted:

    well, it's already in the commit message so I won't repeat the
    long list here ;)

Submitted by:	The FreeBSD(98) Development Team
1996-10-30 22:41:46 +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
e8e87818d1 Fixed pessimized (short) i/o port types. 1996-10-08 21:08:18 +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
b568ea4e01 Removed more devconf leftovers. 1996-09-10 23:31:13 +00:00
Satoshi Asami
c9da8434ea Yet another merge. Remove support.s by deleting memcopy. Remove
autoconf.c by merging icu.h.  Fix a couple of typos.

Submitted by:	The FreeBSD(98) Development Team.
1996-09-07 02:14:47 +00:00
Poul-Henning Kamp
bfbb029d87 Remove devconf, it never grew up to be of any use. 1996-09-06 23:09:20 +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
c673fe98d7 Added #include of <machine/md_var.h>. This will be needed when
some declarations are moved from <machine/cpufunc.h> to better
places.
1996-06-25 20:31:01 +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
Satoshi Asami
ad63a118b2 The Great PC98 Merge.
All new code is "#ifdef PC98"ed so this should make no difference to
PC/AT (and its clones) users.

Ok'd by:	core
Submitted by:	FreeBSD(98) development team
1996-06-14 11:02:28 +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
Peter Wemm
ee323f62ad Jump some hoops to have the *.s code being able to be run through both an
ansi and traditional cpp.

The nesting rules of macros are different, which required some changes.
Use __CONCAT(x,y) instead of /**/.
Redo some comments to use /* */ rather than "# comment" because the ansi
  cpp cares about those, and also cares about quote matching.
1996-05-31 01:08:08 +00:00
Poul-Henning Kamp
f8845af0db First pass at cleaning up macros relating to pages, clusters and all that. 1996-05-02 10:43:17 +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
Justin T. Gibbs
1d7ded8adf Change the devconf description from "ISA or EISA bus" to "ISA bus" now
that we have eisaconf.
1996-04-20 21:22:32 +00:00
Bruce Evans
3745f80a48 Moved AUTO_EOI_[12] and most sio and pcvt options out of the makefile. 1996-04-11 21:18:49 +00:00
Sujal Patel
1dce4e5d60 Add a lock for DMA Channels to prevent two devices from using the same DMA
channel at the same time.  The functions isa_dma_acquire() and
isa_dma_release() should be used in all ISA drivers which call isa_dmastart().
This can be used more generally to register the usage of DMA channels in
any driver, but it is required for drivers using isa_dmastart() and friends.

Clean up sanity checks, error messages, etc.
Remove isa_dmadone_nobounce(), it is no longer needed

Reviewed by:	bde
1996-04-08 19:38:57 +00:00
Bruce Evans
3157adc8af Removed now-unused #includes of <machine/cpu.h>. They were for bootverbose
being declared in the wrong place.
1996-04-07 17:32:42 +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
Bruce Evans
5d170d7eb8 Killed religous FASTER_NOP again. 1996-03-31 03:31:29 +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
Justin T. Gibbs
58a8ca6a4d Cleanse the SCSI subsystem of its internally defined types
u_int32, u_int16, u_int8, int32, int16, int8.
	Use the system defined *_t types instead.
1996-03-10 07:04:48 +00:00
Jordan K. Hubbard
3873c27840 Don't print DMA busy messages - the sound code apparently runs
afoul of this without actually providing useful information and
works nonetheless.
Submitted by:	Jim Lowe <james@miller.cs.uwm.edu>
1996-03-10 02:10:27 +00:00
Mike Pritchard
6c5e9bbdf5 Fix a bunch of spelling errors in the comment fields of
a bunch of system include files.
1996-01-30 23:02:38 +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
Bruce Evans
dd87702a51 Allocate DMA bounce buffers only when requested by drivers. Only the
fd and wt drivers need bounce buffers, so this normally saves 32K-1K
of kernel memory.

Keep track of which DMA channels are busy.  isa_dmadone() must now be
called when DMA has finished or been aborted.

Panic for unallocated and too-small (required) bounce buffers.

fd.c:
There will be new warnings about isa_dmadone() not being called after
DMA has been aborted.

sound/dmabuf.c:
isa_dmadone() needs more parameters than are available, so temporarily
use a new interface isa_dmadone_nobounce() to avoid having to worry
about panics for fake parameters.  Untested.
1996-01-27 02:33:48 +00:00
Bruce Evans
227b8bf258 Cleaned up unused #includes and some other historical cruft.
Sorted and KNFised declarations.
1996-01-27 01:56:30 +00:00
Poul-Henning Kamp
c92a064d21 Reinstate AUTO_EOI_1. This did break suspend/resume on some portables.
In particular mine.  We may want to make it a negative option to
keep GENERIC sane, ie NO_AUTO_EOI_1.
1996-01-19 23:38:07 +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
Peter Wemm
d92566062f Choose a different name to hold the option definition.. The original one
was overlapping with another file, and making some undesirable behavior a
little worse - it's triggering a bug in config that appears to have been
there for some time (before the options files, anyway.)
1996-01-06 23:10:57 +00:00
Garrett Wollman
0e41ee3037 Convert DDB to new-style option. 1996-01-04 21:13:23 +00:00