Commit Graph

3538 Commits

Author SHA1 Message Date
Matthew N. Dodd
3330d5fb09 - Change ELINK_ID_PORT; the 3c507 likes 0x100 better.
- Add module metadata.
2003-03-29 13:18:20 +00:00
Jake Burkholder
227f9a1c58 - 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)
2003-03-25 00:07:06 +00:00
Matthew N. Dodd
257427efe3 Retire sys/pc98/pc98/spkr.c 2003-03-24 21:01:54 +00:00
Matthew N. Dodd
b7b5ae3edb Use repo-copied files in sys/i386/bios. 2003-03-24 19:14:46 +00:00
Matthew N. Dodd
868d8b6286 - Use if_broadcastaddr from struct ifnet rather than relying on
extern 'etherbroadcastaddr'.
- Make 'etherbroadcastaddr' static.

Reviewed by:	 imp
2003-03-21 17:53:16 +00:00
Poul-Henning Kamp
b4b138c27f 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.
2003-03-18 08:45:25 +00:00
Poul-Henning Kamp
d42ee4e410 Note that MAJOR_AUTO is now the default if d_maj is not initialized. This
is more robust and prevents the hijacking of /dev/console for the typical
mistake.

Remove unneeded MAJOR_AUTO uses, it is only needed explicitly now if the
driver source has cross-branch compatibility to old releases.
2003-03-09 11:03:45 +00:00
Peter Wemm
3c6b084e96 Finish driving a stake through the heart of netns and the associated
ifdefs scattered around the place - its dead Jim!

The SMB stuff had stolen AF_NS, make it official.
2003-03-05 19:24:24 +00:00
David Schultz
9c62b3ee7c Make TTYHOG tunable.
Reviewed by:	mike (mentor)
2003-03-05 08:16:29 +00:00
Poul-Henning Kamp
182a9f7455 Make nokqfilter() return the correct return value.
Ditch the D_KQFILTER flag which was used to prevent calling NULL pointers.
2003-03-03 16:24:47 +00:00
Poul-Henning Kamp
7ac40f5f59 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)
2003-03-03 12:15:54 +00:00
Dag-Erling Smørgrav
521f364b80 More low-hanging fruit: kill caddr_t in calls to wakeup(9) / [mt]sleep(9). 2003-03-02 16:54:40 +00:00
Poul-Henning Kamp
f85c6d3502 Use MAJOR_AUTO. 2003-02-27 15:05:28 +00:00
Poul-Henning Kamp
4c61f9036b NODEVFS cleanup:
Don't call devsw_{add,delete}().
These two drivers are actually broken, and have been for quite some time.
2003-02-27 07:36:03 +00:00
Poul-Henning Kamp
f400e58886 msg 2003-02-26 21:01:26 +00:00
Poul-Henning Kamp
109a8a2e47 NODEVFS cleanup: Create devices with make_dev() instead of cdevsw_add() 2003-02-26 20:54:46 +00:00
Maxime Henrion
07159f9c56 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
2003-02-25 03:21:22 +00:00
Poul-Henning Kamp
263444cfbf 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.
2003-02-20 20:54:45 +00:00
Warner Losh
a163d034fa Back out M_* changes, per decision of the TRB.
Approved by: trb
2003-02-19 05:47:46 +00:00
Julian Elischer
4a338afd7a Move a bunch of flags from the KSE to the thread.
I was in two minds as to where to put them in the first case..
I should have listenned to the other mind.

Submitted by:	 parts by davidxu@
Reviewed by:	jeff@ mini@
2003-02-17 09:55:10 +00:00
Poul-Henning Kamp
f341ca9891 Remove #include <sys/dkstat.h> 2003-02-16 14:13:23 +00:00
Poul-Henning Kamp
70d8e2e9aa Switch to using the TSC code in i386/i386/tsc.c. 2003-02-11 11:43:25 +00:00
Poul-Henning Kamp
91f1c2b3cc 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
2003-02-03 19:49:35 +00:00
Jake Burkholder
238dd3209a 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
2003-02-03 17:53:15 +00:00
Alfred Perlstein
04738e99b5 Catch more uses of MIN(). 2003-02-02 13:30:00 +00:00
Alfred Perlstein
8deebb0160 Consolidate MIN/MAX macros into one place (param.h).
Submitted by: Hiten Pandya <hiten@unixdaemons.com>
2003-02-02 13:17:30 +00:00
Poul-Henning Kamp
3c99c0bc50 Make tsc_freq a 64bit quantity.
Inspired by:    http://www.theinquirer.net/?article=7481
2003-01-29 11:36:39 +00:00
Alfred Perlstein
44956c9863 Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.
Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT.
2003-01-21 08:56:16 +00:00
Matthew N. Dodd
e2fdcaf285 - Add inline functions for {ll,l,}abs() to libkern.
- Remove hand rolled abs() functions.
2003-01-15 02:02:33 +00:00
Jens Schweikhardt
9d5abbddbf Correct typos, mostly s/ a / an / where appropriate. Some whitespace cleanup,
especially in troff files.
2003-01-01 18:49:04 +00:00
Jens Schweikhardt
d64ada501a Fix typos, mostly s/ an / a / where appropriate and a few s/an/and/
Add FreeBSD Id tag where missing.
2002-12-30 21:18:15 +00:00
David Xu
4b2d2f604c Set %bx register instead of %di register, see vbe3.0, page 45. 2002-12-26 13:20:58 +00:00
Poul-Henning Kamp
92a306a2b6 Use the correct value when writing the Day Of Week byte in the CMOS.
The correct range is [1...7] with Sunday=1, but we have been writing
[0...6] with Sunday=0.

The Soekris computers flagged the zero, zapped the date, so if you
rebooted your soekris on a sunday, it would come up with a wrong
date.

Bruce has a more extensive rework of this code, but we will stick with
the minimalist fix for now.

Spotted by:	Soren Kristensen <soren@soekris.com>
Thanks to:	Michael Sierchio <kudzu@tenebras.com>.
Confirmed by:	bde
Approved by:	re
2002-12-04 13:46:49 +00:00
Daniel Eischen
2be05b70c9 Add getcontext, setcontext, and swapcontext as system calls.
Previously these were libc functions but were requested to
be made into system calls for atomicity and to coalesce what
might be two entrances into the kernel (signal mask setting
and floating point trap) into one.

A few style nits and comments from bde are also included.

Tested on alpha by: gallatin
2002-11-16 06:35:53 +00:00
Sam Leffler
6fc32a2495 network interface and link layer changes:
o on input don't strip the Ethernet header from packets
o input packet handling is now done with if_input
o track changes to ether_ifattach/ether_ifdetach API
o track changes to bpf tapping
o call ether_ioctl for default handling of ioctl's
o use constants from net/ethernet.h where possible

Reviewed by:	many
Approved by:	re
2002-11-15 00:00:15 +00:00
Alfred Perlstein
29f194457c Fix instances of macros with improperly parenthasized arguments.
Verified by: md5
2002-11-09 12:55:07 +00:00
Matthew N. Dodd
6fe8789d6d - Convert to newbus, bus_space etc.
- Move to MI space.

Tested on:	 i386
2002-11-05 09:37:32 +00:00
David Xu
1f82496322 Fix typo. ioport_rid should be irq_rid. 2002-11-05 04:03:42 +00:00
Matthew N. Dodd
30201b6cef Merge PC98 changes. 2002-11-02 04:18:10 +00:00
Matthew N. Dodd
c7f718ec6a Handle hints for the atspeaker device.
Document same.
2002-10-28 02:00:09 +00:00
Peter Wemm
331e4823a2 Finish fixing the 5.x FPU code for dealing with signal handlers.
Obtained from:  bde
2002-10-25 19:12:16 +00:00
John Baldwin
599c57a971 - New-bussify the rc(4) device driver.
- Add detach support to the driver so that you can kldunload the module.
  Note that currently rc_detach() fails to detach a unit if any of its
  child devices are open, thus a kldunload will fail if any of the tty
  devices are currently open.
- sys/i386/isa/ic/cd180.h was moved to sys/dev/ic/cd180.h as part of
  this change.

Requested by:	rwatson
Tested by:	rwatson
2002-10-23 15:53:09 +00:00
John Baldwin
8bbdb8e89f Add an identify method that creates a pmtimer0 device if it doesn't alreedy
exist.  Hints are no longer needed to instantiate a pmtimer(4) device.
2002-10-22 17:30:52 +00:00
Brooks Davis
db394c7a54 Use if_printf() instead of printf() to print diagnositic messages in the
form "rdp#: blah".
2002-10-21 14:38:28 +00:00
Brooks Davis
36cee51404 Use if_printf(ifp, "blah") instead of
printf("%s%d: blah", ifp->if_name, ifp->if_unit).
2002-10-21 14:37:31 +00:00
Poul-Henning Kamp
05f6411a98 Remove a boatload of '&' which are surplus to the requirements.
Validated by:	md5 hash is unchanged.
2002-10-20 18:02:46 +00:00
Poul-Henning Kamp
218565dc75 Hide inline assembly if lint is defined. 2002-10-20 17:30:30 +00:00
Mitsuru IWASAKI
0ebefa8c4e 1. Fix a comment. Locking _is_ needed (but not done).
2. Update a comment.  We now restore much more than RTC updates and
   interrupts.
3. Order change.  Stop interrupts by writing to RTC_STATUSB,
   restore rate bits for the interrupts by writing to RTC_STATUSA,
   then enable interrupts again.
   This seems to be done perfectly backwards in startrtclock().
   Otherwise, the idea for this change was obtained from
   startrtclock().
4. Don't stop the clock (RTCB_HALT).  We only program some control bits
   and don't want to stop the clock.
5. (Not really related.)  Add caveats to the comment about timer_restore().
   The update is non-atomic since locking is not done.

On locking:
6. rtcin() and writertc() are locked() adequately by splhigh() in RELENG_4,
   but this locking is null in -current.
7. Doing things in the correct order in (3) combined with (6) is probably
   enough locking for rtcrestore() in RELENG_4.  In -current, the
   writertc()'s race with rtcintr() unless the BIOS disables RTC interrupts.

Submitted by:	bde (including commit message)
MFC after:	1 week
2002-10-17 13:55:39 +00:00
Poul-Henning Kamp
3412120f03 Be consistent about funtions being static.
Spotte by:	FlexeLint.
2002-10-16 10:16:17 +00:00
Poul-Henning Kamp
3bd6561289 NB: This commit does *NOT* make GEOM the default in FreeBSD
NB: But it will enable it in all kernels not having options "NO_GEOM"

Put the GEOM related options into the intended order.

Add "options NO_GEOM" to all kernel configs apart from NOTES.

In some order of controlled fashion, the NO_GEOM options will be
removed, architecture by architecture in the coming days.

There are currently three known issues which may force people to
need the NO_GEOM option:

boot0cfg/fdisk:
        Tries to update the MBR while it is being used to control
        slices.  GEOM does not allow this as a direct operation.

SCSI floppy drives:
        Appearantly the scsi-da driver return "EBUSY" if no media
        is inserted.  This is wrong, it should return ENXIO.

PC98:
        It is unclear if GEOM correctly recognizes all variants of
        PC98 disklabels.  (Help Wanted!  I have neither docs nor HW)

These issues are all being worked.

Sponsored by:	DARPA & NAI Labs.
2002-10-05 16:35:33 +00:00
Matthew N. Dodd
bafe85a4ad Remove duplicate make_dev() calls. 2002-10-04 08:33:10 +00:00
Matthew N. Dodd
3ae5b53264 newbus & bus_space the mcd(4) driver. 2002-10-04 07:14:19 +00:00
Scott Long
0910374b7f Alas, poor matcd, I knew ye well.
It doesn't work.
It cannot be made to work.
Goodbye.

X-MFC after:	ASAP
2002-10-04 06:06:04 +00:00
Matthew N. Dodd
efe66a4be9 Minor style(9) changes. 2002-10-04 02:21:26 +00:00
Matthew N. Dodd
4c7a1919f6 Remove duplicate calls to make_dev(). 2002-10-04 01:58:55 +00:00
John Baldwin
a1885c44cf Whitespace nit. 2002-10-01 20:05:58 +00:00
Poul-Henning Kamp
150b2bdfb2 If GEOM is in the kernel, take these three out. I have no way of
testing any modifications to them, they shouldn't even bother with
disklabels in the first place and they are just plain obsolete old
hardware which should be axed entirely before 5.0-R IMO.

Sponsored by:	DARPA & NAI Labs.
2002-09-30 13:49:20 +00:00
Poul-Henning Kamp
37c841831f Be consistent about "static" functions: if the function is marked
static in its prototype, mark it static at the definition too.

Inspired by:    FlexeLint warning #512
2002-09-28 17:15:38 +00:00
Alfred Perlstein
4f492bfab5 use __packed. 2002-09-23 18:54:32 +00:00
Poul-Henning Kamp
bc8c3c3e37 Fix a 3 year old oversight: Remove the #ifdef/#endif pair now that there
is nothing between them anymore.

Spotted by:	peter.
2002-09-21 07:59:06 +00:00
Mitsuru IWASAKI
076ef4620b Restore status register A of RTC at resume time.
This should fix the 'too many RTC interrupts and statclock seems
broken after resume' problem.

MFC after:	1 week
2002-09-18 07:34:04 +00:00
Jonathan Mini
30abe507c0 Add kernel support needed for the KSE-aware libpthread:
- Maintain fpu state across signals.
	- Save and restore FPU state properly in ucontext_t's.

Reviewed by:	bde, deischen, julian
Approved by:	-arch
2002-09-16 19:25:59 +00:00
Peter Wemm
f7749f924c Automatically enable CPU_ENABLE_SSE (detect and enable SSE instructions)
if compiling with I686_CPU as a target.  CPU_DISABLE_SSE will prevent
this from happening and will guarantee the code is not compiled in.

I am still not happy with this, but gcc is now generating code that uses
these instructions if you set CPUTYPE to p3/p4 or athlon-4/mp/xp or higher.
2002-09-07 07:02:12 +00:00
Philippe Charnier
93b0017f88 Replace various spelling with FALLTHROUGH which is lint()able 2002-08-25 13:23:09 +00:00
Peter Wemm
8b2624e85c Ok, somebody please shoot me. The asm I wrote for the ranged IPI shootdown
was wrong.  It only ever invalidated one page due to me getting the loop
terminator wrong.  This explains the DISABLE_PG_G effect on SMP.
2002-08-23 21:45:59 +00:00
Robert Watson
82d9ad331a Add additional range checks for copyout targets.
Submitted by:	Silvio Cesare <silvio@qualys.com>
2002-08-09 05:50:32 +00:00
Warner Losh
8b5cc27046 Fix more abuse of __FreeBSD__ to detect version. 2002-07-21 05:34:14 +00:00
Peter Wemm
cd71fd08cc Stop abusing NPCI for code that doesn't even work. Emit a warning. 2002-07-21 05:25:49 +00:00
Bruce Evans
3c9d896571 Quick fix for high resolution kernel profiling on i386's. Use
-finstrument-functions instead of -mprofiler-epilogue.  The former
works essentially the same as the latter but has a higher overhead
(about 22 more bytes per function for passing unused args to the
profiling functions).

Removed all traces of the IDENT Makefile variable, which had been
reduced to just a place for holding profiling's contribution to CFLAGS
(the IDENT that gives the kernel identity was renamed to KERN_IDENT).
2002-07-13 22:28:34 +00:00
Peter Wemm
f1b665c8fe Revive backed out pmap related changes from Feb 2002. The highlights are:
- It actually works this time, honest!
- Fine grained TLB shootdowns for SMP on i386.  IPI's are very expensive,
  so try and optimize things where possible.
- Introduce ranged shootdowns that can be done as a single IPI.
- PG_G support for i386
- Specific-cpu targeted shootdowns.  For example, there is no sense in
  globally purging the TLB cache for where we are stealing a page from
  the local unshared process on the local cpu.  Use pm_active to track
  this.
- Add some instrumentation for the tlb shootdown code.
- Rip out SMP code from <machine/cpufunc.h>
- Try and fix some very bogus PG_G and PG_PS interactions that were bad
  enough to cause vm86 bios calls to break.  vm86 depended on our existing
  bugs and this was the cause of the VESA panics last time.
- Fix the silly one-line error that caused the 'panic: bad pte' last time.
- Fix a couple of other silly one-line errors that should have caused more
  pain than they did.

Some more work is needed:
- pmap_{zero,copy}_page[_idle].  These can be done without IPI's if we
  have a hook in cpu_switch.
- The IPI handlers need some cleanup.  I have a bogus %ds load that can
  be avoided.
- APTD handling is rather bogus and appears to be a large source of
  global TLB IPI shootdowns for no really good reason.

I see speedups of between 1.5% and ~4% on buildworlds in a while 1 loop.
I expect to see a bigger difference when there is significant pageout
activity or the system otherwise has memory shortages.

I have backed out a few optimizations that I had been using over the last
few days in order to be a little more conservative.  I'll revisit these
again over the next few days as the dust settles.

New option:  DISABLE_PG_G - In case I missed something.
2002-07-12 07:56:11 +00:00
Peter Wemm
da035a22eb Bah, move the invltlb counter to C code and hook a debug sysctl onto it. 2002-07-11 08:31:10 +00:00
Peter Wemm
dedf64505a s/NCPU/MAXCPU/ to try and get this to compile. 2002-07-11 08:24:33 +00:00
Julian Elischer
d50fe601d4 This file has been included en-mass into i386/i386/exception.s 2002-07-10 21:07:47 +00:00
Mike Barcroft
a6519e64cc Move the type definition of ointhand2_t from i386/include/types.h to
i386/isa/isa_device.h.  This is a more appropriate location and
helps restrict <machine/types.h> to only types that exist on all
platforms.
2002-07-09 01:16:18 +00:00
Peter Wemm
9ecb46bf87 The clock is already allocated as 'fast' - no need to try and intercept a
'slow' interrupt registration and convert it into 'fast'.
2002-07-08 09:12:22 +00:00
Peter Wemm
160554fbf4 Remove a couple of __P() stragglers. 2002-06-29 02:32:34 +00:00
Mark Peek
5e3939b59b Clock frequencies reported by sysctl should be unsigned values. Discovered
when machdep.tsc_freq returned a negative number on a 2.2GHz Xeon.

Submitted by:	Brian Harrison <bharrison@ironport.com>
Reviewed by:	phk
MFC after:	1 week
2002-06-22 16:30:18 +00:00
Jens Schweikhardt
21dc7d4f57 Fix typo in the BSD copyright: s/withough/without/
Spotted and suggested by:	des
MFC after:	3 weeks
2002-06-02 20:05:59 +00:00
Robert Watson
6be2f8829a Off-by-128 error in the cuam* device node numbers. 2002-05-20 05:12:56 +00:00
Robert Watson
12f2edc7d5 Bump the rc driver a little bit closer to the 21st century: use
make_dev() to create device nodes for each of the serial port channels
(ttym%d and cuam%d respectively, as borrowed from MAKEDEV).  This allows
the rc driver to work in 5.0.  I've tested it with only one card, but
will try sticking in a second card tomorrow and see what happens.
2002-05-20 05:04:41 +00:00
Poul-Henning Kamp
22bd43ccda Move a few ancient minor-number definitions for tapedrives to the
only driver which uses them.  Remove the rest.
2002-05-14 06:57:02 +00:00
Bruce Evans
f318190a01 Fixed checking for VM86 mode in doreti which I broke in rev.1.30. Only
the case of VM86 calls from the kernel was broken, so this bug was not
a security hole.

PR:		36710
Submitted by:	David Xu <davidx@viasoft.com.cn> (version for RELENG_4)
MFC after:	3 days
2002-05-05 03:19:48 +00:00
Poul-Henning Kamp
2266fe776e Don't export timecounter structures under debug. with sysctl, they
contain no truly interesting data anymore.
2002-04-30 19:34:31 +00:00
Peter Wemm
db17c6fc07 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)
2002-04-29 07:43:16 +00:00
Poul-Henning Kamp
7e2d76ff05 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.
2002-04-26 10:06:26 +00:00
Poul-Henning Kamp
2ce7d7a033 GC various bits and pieces of USERCONFIG from all over the place. 2002-04-09 11:18:46 +00:00
Yoshihiro Takahashi
181593adec Move ICU_* defines into icu.h. 2002-04-06 08:25:05 +00:00
John Baldwin
6008862bc2 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
2002-04-04 21:03:38 +00:00
Poul-Henning Kamp
408ab1b875 Retire the bogus ioctl DIOCGPART in toto.
Once again we can notice that badly thought out hacks ferment and infect
far more code than initially expected.

Sponsored by:	DARPA and NAI Labs.
2002-04-02 11:52:13 +00:00
Matthew Dillon
182da8209d Stage-2 commit of the critical*() code. This re-inlines cpu_critical_enter()
and cpu_critical_exit() and moves associated critical prototypes into their
own header file, <arch>/<arch>/critical.h, which is only included by the
three MI source files that need it.

Backout and re-apply improperly comitted syntactical cleanups made to files
that were still under active development.  Backout improperly comitted program
structure changes that moved localized declarations to the top of two
procedures.  Partially re-apply one of the program structure changes to
move 'mask' into an intermediate block rather then in three separate
sub-blocks to make the code more readable.  Re-integrate bug fixes that Jake
made to the sparc64 code.

Note: In general, developers should not gratuitously move declarations out
of sub-blocks.  They are where they are for reasons of structure, grouping,
readability, compiler-localizability, and to avoid developer-introduced bugs
similar to several found in recent years in the VFS and VM code.

Reviewed by:	jake
2002-04-01 23:51:23 +00:00
John Baldwin
44731cab3b 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@
2002-04-01 21:31:13 +00:00
Jake Burkholder
d0ce9a7e07 Remove abuse of intr_disable/restore in MI code by moving the loop in ast()
back into the calling MD code.  The MD code must ensure no races between
checking the astpening flag and returning to usermode.

Submitted by:	peter (ia64 bits)
Tested on:	alpha (peter, jeff), i386, ia64 (peter), sparc64
2002-03-29 16:35:26 +00:00
Matthew Dillon
93e70a5f37 Tab-out the backslashes in icu_vector.s to make it more readable and to
match it up with apic_vector.s.
2002-03-27 05:43:11 +00:00
Matthew Dillon
d74ac6819b 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
2002-03-27 05:39:23 +00:00
Nicolas Souchu
ea4122d2bf Fix bktr and pcf compilation with LINT 2002-03-25 21:22:35 +00:00
Will Andrews
05f920205e Minor changes:
[1] Support the Sony VAIO Jogdial in moused(8).
 [2] Modify spic(4) to support additional Sony VAIO models.

Submitted by:	[1] Juriy Goloveshkin <j@gu.ru>,
		[2] Akira Funahashi <funa@funa.org>
Tested by:	cjh, jim, Jerry A! <jerry@thehutt.org>
Approved by:	nsayer
MFC after:	2 weeks
2002-03-24 03:07:07 +00:00
Bruce Evans
ea1499bf8f Fixed some style bugs in the removal of __P(()). The main ones were
not removing tabs before "__P((", and not outdenting continuation lines
to preserve non-KNF lining up of code with parentheses.  Switch to KNF
formatting and/or rewrap the whole prototype in some cases.
2002-03-23 16:01:49 +00:00
Warner Losh
ba74981e71 Fix abuses of cpu_critical_{enter,exit} by converting to
intr_{disable,restore} as well as providing an implemenation of
intr_{disable,restore}.

Reviewed by: jake, rwatson, jhb
2002-03-21 06:19:08 +00:00
Alfred Perlstein
89c9a48352 Remove __P. 2002-03-20 07:51:46 +00:00
Alfred Perlstein
85f190e4d1 Fixes to make select/poll mpsafe.
Problem:
  selwakeup required calling pfind which would cause lock order
  reversals with the allproc_lock and the per-process filedesc lock.
Solution:
  Instead of recording the pid of the select()'ing process into the
  selinfo structure, actually record a pointer to the thread.  To
  avoid dereferencing a bad address all the selinfo structures that
  are in use by a thread are kept in a list hung off the thread
  (protected by sellock).  When a selwakeup occurs the selinfo is
  removed from that threads list, it is also removed on the way out
  of select or poll where the thread will traverse its list removing
  all the selinfos from its own list.

Problem:
  Previously the PROC_LOCK was used to provide the mutual exclusion
  needed to ensure proper locking, this couldn't work because there
  was a single condvar used for select and poll and condvars can
  only be used with a single mutex.
Solution:
  Introduce a global mutex 'sellock' which is used to provide mutual
  exclusion when recording events to wait on as well as performing
  notification when an event occurs.

Interesting note:
  schedlock is required to manipulate the per-thread TDF_SELECT
  flag, however if given its own field it would not need schedlock,
  also because TDF_SELECT is only manipulated under sellock one
  doesn't actually use schedlock for syncronization, only to protect
  against corruption.

Proc locks are no longer used in select/poll.

Portions contributed by: davidc
2002-03-14 01:32:30 +00:00
Hellmuth Michaelis
29c063831d make pcvt compile again without "options XSERVER".
PR: 35577
2002-03-08 19:06:46 +00:00
Peter Wemm
4945f5ec47 Fix warning (const lost in assignment), harmless in this case. 2002-02-28 03:13:47 +00:00
John Baldwin
a854ed9893 Simple p_ucred -> td_ucred changes to start using the per-thread ucred
reference.
2002-02-27 18:32:23 +00:00
Peter Wemm
d1693e1701 Back out all the pmap related stuff I've touched over the last few days.
There is some unresolved badness that has been eluding me, particularly
affecting uniprocessor kernels.  Turning off PG_G helped (which is a bad
sign) but didn't solve it entirely.  Userland programs still crashed.
2002-02-27 09:51:33 +00:00
Matthew Dillon
181df8c9d4 revert last commit temporarily due to whining on the lists. 2002-02-26 20:33:41 +00:00
Matthew Dillon
f96ad4c223 STAGE-1 of 3 commit - allow (but do not require) interrupts to remain
enabled in critical sections and streamline critical_enter() and
critical_exit().

This commit allows an architecture to leave interrupts enabled inside
critical sections if it so wishes.  Architectures that do not wish to do
this are not effected by this change.

This commit implements the feature for the I386 architecture and provides
a sysctl, debug.critical_mode, which defaults to 1 (use the feature).  For
now you can turn the sysctl on and off at any time in order to test the
architectural changes or track down bugs.

This commit is just the first stage.  Some areas of the code, specifically
the MACHINE_CRITICAL_ENTER #ifdef'd code, is strictly temporary and will
be cleaned up in the STAGE-2 commit when the critical_*() functions are
moved entirely into MD files.

The following changes have been made:

	* critical_enter() and critical_exit() for I386 now simply increment
	  and decrement curthread->td_critnest.  They no longer disable
	  hard interrupts.  When critical_exit() decrements the counter to
	  0 it effectively calls a routine to deal with whatever interrupts
	  were deferred during the time the code was operating in a critical
	  section.

	  Other architectures are unaffected.

	* fork_exit() has been conditionalized to remove MD assumptions for
	  the new code.  Old code will still use the old MD assumptions
	  in regards to hard interrupt disablement.  In STAGE-2 this will
	  be turned into a subroutine call into MD code rather then hardcoded
	  in MI code.

	  The new code places the burden of entering the critical section
	  in the trampoline code where it belongs.

	* I386: interrupts are now enabled while we are in a critical section.
	  The interrupt vector code has been adjusted to deal with the fact.
	  If it detects that we are in a critical section it currently defers
	  the interrupt by adding the appropriate bit to an interrupt mask.

	* In order to accomplish the deferral, icu_lock is required.  This
	  is i386-specific.  Thus icu_lock can only be obtained by mainline
	  i386 code while interrupts are hard disabled.  This change has been
	  made.

	* Because interrupts may or may not be hard disabled during a
	  context switch, cpu_switch() can no longer simply assume that
	  PSL_I will be in a consistent state.  Therefore, it now saves and
	  restores eflags.

	* FAST INTERRUPT PROVISION.  Fast interrupts are currently deferred.
	  The intention is to eventually allow them to operate either while
	  we are in a critical section or, if we are able to restrict the
	  use of sched_lock, while we are not holding the sched_lock.

	* ICU and APIC vector assembly for I386 cleaned up.  The ICU code
	  has been cleaned up to match the APIC code in regards to format
	  and macro availability.  Additionally, the code has been adjusted
	  to deal with deferred interrupts.

	* Deferred interrupts use a per-cpu boolean int_pending, and
	  masks ipending, spending, and fpending.  Being per-cpu variables
	  it is not currently necessary to lock; bus cycles modifying them.

	  Note that the same mechanism will enable preemption to be
	  incorporated as a true software interrupt without having to
	  further hack up the critical nesting code.

	* Note: the old critical_enter() code in kern/kern_switch.c is
	  currently #ifdef to be compatible with both the old and new
	  methodology.  In STAGE-2 it will be moved entirely to MD code.

Performance issues:

	One of the purposes of this commit is to enhance critical section
	performance, specifically to greatly reduce bus overhead to allow
	the critical section code to be used to protect per-cpu caches.
	These caches, such as Jeff's slab allocator work, can potentially
	operate very quickly making the effective savings of the new
	critical section code's performance very significant.

	The second purpose of this commit is to allow architectures to
	enable certain interrupts while in a critical section.  Specifically,
	the intention is to eventually allow certain FAST interrupts to
	operate rather then defer.

	The third purpose of this commit is to begin to clean up the
	critical_enter()/critical_exit()/cpu_critical_enter()/
	cpu_critical_exit() API which currently has serious cross pollution
	in MI code (in fork_exit() and ast() for example).

	The fourth purpose of this commit is to provide a framework that
	allows kernel-preempting software interrupts to be implemented
	cleanly.  This is currently used for two forward interrupts in I386.
	Other architectures will have the choice of using this infrastructure
	or building the functionality directly into critical_enter()/
	critical_exit().

	Finally, this commit is designed to greatly improve the flexibility
	of various architectures to manage critical section handling,
	software interrupts, preemption, and other highly integrated
	architecture-specific details.
2002-02-26 17:06:21 +00:00
Bruce Evans
fbd7573929 Initialize a variable bogusly to avoid a gcc bug that causes a spurious
warning.
2002-02-26 17:04:29 +00:00
Peter Wemm
6bd95d70db Work-in-progress commit syncing up pmap cleanups that I have been working
on for a while:
- fine grained TLB shootdown for SMP on i386
- ranged TLB shootdowns.. eg: specify a range of pages to shoot down with
  a single IPI, since the IPI is very expensive.  Adjust some callers
  that used to trigger this inside tight loops to do a ranged shootdown
  at the end instead.
- PG_G support for SMP on i386 (options ENABLE_PG_G)
- defer PG_G activation till after we decide what we are going to do with
  PSE and the 4MB pages at the start of the kernel.  This should solve
  some rumored strangeness about stale PG_G entries getting stuck
  underneath the 4MB pages.
- add some instrumentation for the fine TLB shootdown
- convert some asm instruction wrappers from functions to inlines.  gcc
  seems to do a fair bit better with this.
- [temporarily!] pessimize the tlb shootdown IPI handlers.  I will fix
  this again shortly.

This has been working fairly well for me for a while, but I have tweaked
it again prior to commit since my last major testing round.  The only
outstanding problem that I know of is PG_G related, which is why there
is an option for it (not on by default for SMP).  I have seen a world
speedups by a few percent (as much as 4 or 5% in one case) but I have
*not* accurately measured this - I am a bit sceptical of these numbers.
2002-02-25 23:49:51 +00:00
Seigo Tanimura
f591779bb5 Lock struct pgrp, session and sigio.
New locks are:

- pgrpsess_lock which locks the whole pgrps and sessions,
- pg_mtx which protects the pgrp members, and
- s_mtx which protects the session members.

Please refer to sys/proc.h for the coverage of these locks.

Changes on the pgrp/session interface:

- pgfind() needs the pgrpsess_lock held.

- The caller of enterpgrp() is responsible to allocate a new pgrp and
  session.

- Call enterthispgrp() in order to enter an existing pgrp.

- pgsignal() requires a pgrp lock held.

Reviewed by:	jhb, alfred
Tested on:	cvsup.jp.FreeBSD.org
		(which is a quad-CPU machine running -current)
2002-02-23 11:12:57 +00:00
Yoshihiro Takahashi
9d139b79d4 - Split the routine to initialize a bus_space_handle into the separate
function.
- Only access a bus_space_handle if the resource type is SYS_RES_MEMORY or
  SYS_RES_IOPORT.
- Add the bus_space_subregion supports.
2002-02-17 09:16:45 +00:00
Yoshihiro Takahashi
65939fef0f Add needed include. 2002-02-10 10:16:22 +00:00
John Baldwin
2deac418f3 Don't grab the ICU lock while reading the current pending interrupts and
current masked interrupts from the AT PIC.

Requested by:	bde
2002-02-08 18:30:36 +00:00
Bruce Evans
586079cc26 Don't include <isa/isavar.h> or compile code depending on it when isa
is not configured.  Including <isa/isavar.h> when it is not used is
harmful as well as bogus, since it includes "isa_if.h" which is not
generated when isa is not configured.

This was fixed in 1999 but was broken by unconditionalizing PNPBIOS.
2002-01-30 12:41:12 +00:00
Bruce Evans
c636c4a872 Removed unused includes. In particular, don't include <isa/isavar.h> since
its only effect is to break the optionality of the isa option.

Sorted includes.
2002-01-30 12:23:49 +00:00
Joerg Wunsch
87fa2d16c3 Unbreak pcvt, it suffered from common variables. Whoever added the
-fno-common could not have possibly compiled LINT afterwards with
this...
2002-01-27 09:17:27 +00:00
Wes Peters
ce6d929bb5 Add missing destroy_dev().
Submitted by:	Maxime Henrion <mux@sneakerz.org>
Reviewed by:	msmith@
MFC after:	3 weeks
2002-01-23 01:11:52 +00:00
Bruce Evans
85090cbb33 Garbage-collect an unused variable left by rev.1.61. 2002-01-17 18:50:46 +00:00
John Baldwin
c86b6ff551 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
2002-01-05 08:47:13 +00:00
Thomas Moestl
01f1aed259 Use the new resource_list_print_type() function.
Pass the bus device to isa_init() (this is needed for the sparc64
version).
2001-12-21 21:54:56 +00:00
John Baldwin
98f9879242 Introduce a standard name for the lock protecting an interrupt controller
and it's associated state variables: icu_lock with the name "icu".  This
renames the imen_mtx for x86 SMP, but also uses the lock to protect
access to the 8259 PIC on x86 UP.  This also adds an appropriate lock to
the various Alpha chipsets which fixes problems with Alpha SMP machines
dropping interrupts with an SMP kernel.
2001-12-20 23:48:31 +00:00
Peter Wemm
1a7c0630db I am not sure if it is a good idea or not to have my id in the cvs log
for this file, but here goes nothing.  This was my first attempt at
tidying up this file.  Unfortunately, it just exposes many more horrors
in the code itself that had been masked by the eyesore that was there
before.  I think this just needs to be put out of its misery.
2001-12-20 05:34:49 +00:00
John Baldwin
7235f2b1e9 Axe stale extern for a non-existent variable. 2001-12-18 22:42:09 +00:00
John Baldwin
7e1f6dfe9d Modify the critical section API as follows:
- The MD functions critical_enter/exit are renamed to start with a cpu_
  prefix.
- MI wrapper functions critical_enter/exit maintain a per-thread nesting
  count and a per-thread critical section saved state set when entering
  a critical section while at nesting level 0 and restored when exiting
  to nesting level 0.  This moves the saved state out of spin mutexes so
  that interlocking spin mutexes works properly.
- Most low-level MD code that used critical_enter/exit now use
  cpu_critical_enter/exit.  MI code such as device drivers and spin
  mutexes use the MI wrappers.  Note that since the MI wrappers store
  the state in the current thread, they do not have any return values or
  arguments.
- mtx_intr_enable() is replaced with a constant CRITICAL_FORK which is
  assigned to curthread->td_savecrit during fork_exit().

Tested on:	i386, alpha
2001-12-18 00:27:18 +00:00
John Baldwin
0bbc882680 Overhaul the per-CPU support a bit:
- The MI portions of struct globaldata have been consolidated into a MI
  struct pcpu.  The MD per-CPU data are specified via a macro defined in
  machine/pcpu.h.  A macro was chosen over a struct mdpcpu so that the
  interface would be cleaner (PCPU_GET(my_md_field) vs.
  PCPU_GET(md.md_my_md_field)).
- All references to globaldata are changed to pcpu instead.  In a UP kernel,
  this data was stored as global variables which is where the original name
  came from.  In an SMP world this data is per-CPU and ideally private to each
  CPU outside of the context of debuggers.  This also included combining
  machine/globaldata.h and machine/globals.h into machine/pcpu.h.
- The pointer to the thread using the FPU on i386 was renamed from
  npxthread to fpcurthread to be identical with other architectures.
- Make the show pcpu ddb command MI with a MD callout to display MD
  fields.
- The globaldata_register() function was renamed to pcpu_init() and now
  init's MI fields of a struct pcpu in addition to registering it with
  the internal array and list.
- A pcpu_destroy() function was added to remove a struct pcpu from the
  internal array and list.

Tested on:	alpha, i386
Reviewed by:	peter, jake
2001-12-11 23:33:44 +00:00
David E. O'Brien
6e551fb628 Update to C99, s/__FUNCTION__/__func__/,
also don't use ANSI string concatenation.
2001-12-10 08:09:49 +00:00
Poul-Henning Kamp
e315b6d75b Also remove the .h files for the old rp driver. 2001-11-05 21:23:24 +00:00
Poul-Henning Kamp
0d60c3f5cf Remove the old RocketPort driver which was left behind in favour
of the new driver.  The new driver works, the old one is 1+ year behind.
2001-11-05 20:49:30 +00:00
Poul-Henning Kamp
0ac42ec512 Don't call cdevsw_add(). 2001-11-04 09:09:41 +00:00
Poul-Henning Kamp
9f441d5a6d Don't call devsw_add(). 2001-11-04 09:07:23 +00:00
Poul-Henning Kamp
8fb6b29956 Don't call cdevsw_add(). 2001-11-04 08:58:22 +00:00
Poul-Henning Kamp
d7297990fa Don't call cdevsw_add() 2001-11-04 08:54:15 +00:00
Poul-Henning Kamp
54056d2da9 Call to cdevsw_add() no longer needed. 2001-11-04 08:49:51 +00:00
Mitsuru IWASAKI
f9390180fe Some fix for the recent apm module changes.
- Now that apm loadable module can inform its existence to other kernel
   components  (e.g. i386/isa/clock.c:startrtclock()'s TCS hack).
 - Exchange priority of SI_SUB_CPU and SI_SUB_KLD for above purpose.
 - Add simple arbitration mechanism for APM vs. ACPI.  This prevents
   the kernel enables both of them.
 - Remove obsolete `#ifdef DEV_APM' related code.
 - Add abstracted interface for Powermanagement operations.  Public apm(4)
   functions, such as apm_suspend(), should be replaced new interfaces.
   Currently only power_pm_suspend (successor of apm_suspend) is implemented.

Reviewed by:	peter, arch@ and audit@
2001-11-01 16:34:07 +00:00
Luigi Rizzo
c5ca4c7e6e Backout 1.61 -- both intrcnt and intrnames are already exported
via sysctl under "hw".
2001-10-25 01:32:24 +00:00
Bruce Evans
08b00f49c3 MFi386:
- sys/pc98/pc98/npx.c 1.87 (2001/09/15; author: imp)
  I don't think pc98 has acpi at all, so ifdef the acpi attachments for
  now.

This completes merging sys/pc98/pc98/npx.c into sys/i386/isa/npx.c so
that the former can be removed.
2001-10-21 06:05:08 +00:00
Bruce Evans
abfde38316 MFpc98: fundamental differences. The magic numbers for the i/o port
and the irq are different for pc98, and are not very well handled (we
use a historical mess of hard-coded values, values from header files
and values from hints).
2001-10-21 05:56:03 +00:00
Bruce Evans
40d8c8da95 MFpc98: all changes in sys/pc98/pc98/npx.c related to FPU_ERROR_BROKEN.
- 1.58 (2000/09/01; author: kato)
  Fixed FPU_ERROR_BROKEN code.  It had old-isa code.
- 1.33 (1998/03/09; author: kato)
  Make FPU_ERROR_BROKEN a new-style option.
- 1.7 (1996/10/09; author: asami)
  Make sure FPU is recognized for non-Intel CPUs.

The log for rev.1.7 should have said something like:
Added FPU_ERROR_BROKEN option.  This forces a successful probe for
exception 16, so that hardware with a broken FPU error signal can sort
of work.
2001-10-21 05:18:30 +00:00
Jonathan Lemon
bb373620cb Fix the le driver - it has been broken for a while and these fixes have
been sitting neglected in my tree.
2001-10-19 15:47:41 +00:00
Bruce Evans
265e95d904 Deleted most of npxprobe(), and merged npxprobe1() back into npxprobe().
Use the normal interrupt handler (npx_intr()) instead of a special
probe-time interrupt handler, although this causes problems due to
the bus_teardown_intr() not actually even tearing down the interrupt
(these problems were avoided by doing interrupt attachment for the
special interrupt handler directly).  Fixed minor bitrot in comments.

The reason for the npxprobe()/npxprobe1() split mostly went away at
about the same time it was made (in 1992 or 1993 just before the
beginning of history).  386BSD ran all probes with interrupts completely
masked, and I didn't want to disturb this when I added an irq probe
to npxprobe().  An irq (not necessarily npx) must be acked for at least
external npx's to take the cpu out of the wait state that it enters
when an npx error occurs, so the probe must be done with a suitable
irq unmasked.  npxprobe() went to great lengths to unmask precisely
the npx irq.

Running probes with all interrupts masked was never really needed in
FreeBSD, since FreeBSD always masked interrupts well enough using
splhigh(), but it wasn't until rev.1.48 (1995/12/12) of autoconf.c
that all probes were run with CPU interrupts enabled.  This permits
npxprobe() to probe its irq using normal interrupt resources.  Note
that most drivers still can't depend on this.  It depends on the
interrupt handler being fast and the irq not being shared.
2001-10-16 14:12:35 +00:00
Bruce Evans
2504f76272 Commit my old fixes for cosmetic bugs in npxprobe() so that they aren't
lost when the buggy code goes away completely:
- don't assume that the npx irq number is >= 8.  Rev.1.73 only reversed
  part of the hard-coding of it to 13 in rev.1.66.
- backed out the part of rev.1.84 that added a highly confused comment
  about an enable_intr() being "highly bogus".  The whole reason for
  existence of npxprobe() (separate from the main probe, npxprobe1())
  is to handle the complications to make this enable_intr() safe.
- backed out the part of rev.1.94 that modified npxprobe().  It mainly
  broke the enable_intr() to restore_intr().  Restoring the interrupt
  state in a nested way is precisely what is not wanted here.  It was
  harmless in practice because npxprobe() is called with interrupts
  enabled, so restoring the interrupt state enables interrupts.  Most
  of npxprobe() is a no-op for the same reason...
2001-10-16 12:55:38 +00:00
Tor Egge
4c8f0aced5 Explicitly initialize the fpu when SSE is enabled since this no
longer happens as a side effect of calling npxsave.

Reviewed by:	peter, bde
2001-10-15 20:18:06 +00:00
John Baldwin
7106ca0d1a Add missing includes of sys/lock.h. 2001-10-11 17:52:20 +00:00
Ian Dowse
3c7bcedd06 Remove the Xresume* labels from the i386 interrupt handlers; the
code in ipl.s and icu_ipl.s that used them was removed when the
interrupt thread system was committed. Debuggers also knew about
Xresume* because these labels hide the real names of the interrupt
handlers (Xintr*), and debuggers need to special-case interrupt
handlers to get the interrupt frame.

Both gdb and ddb will now use the Xintr* and Xfastintr* symbols to
detect interrupt frames. Fast interrupt frames were never identified
correctly before, so this fixes the problem of the running stack
frame getting lost in a ddb or gdb trace generated from a fast
interrupt - e.g. when debugging a simple infinite loop in the kernel
using a serial console, the frame containing the loop would never
appear in a gdb or ddb trace.

Reviewed by:	jhb, bde
2001-10-09 19:54:52 +00:00
Robert Drehmel
1e8ff53804 Remove an unneeded variable declaration and statement.
Approved by:	jake
2001-10-09 16:06:28 +00:00
John Baldwin
f955d6dc66 Don't attempt to initialize the pcaudio device on open. The attach routine
already does the initialization (though it didn't set pca_initialized, so
we always initialized twice) and since attach calls make_dev(), there's no
way that pcaopen() can be called before pcaattach().
2001-10-08 23:35:40 +00:00
Luigi Rizzo
7d4b046991 Export interrupt statistics via sysctl.
MFC-after: 3 days
2001-10-07 17:03:56 +00:00
Yoshihiro Takahashi
f2eeb19063 Rewrite the pc98 bus_space stuff.
The type of bus_space_tag_t is now a pointer to bus_space_tag structure,
and the bus_space_tag structure saves pointers to functions for direct
access and relocate access.

Added bsh_bam member to the bus_space_handle structure, it saves access
method either direct access or relocate access which is called by
bus_space_* functions.

Added the mecia device support. If the bs_da and bs_ra in bus tag are set
NEPC_io_space_tag and NEPC_mem_space_tag respectively, new bus_space stuff
changes the register of mecia automatically for 16bit access.

Obtained from:	NetBSD/pc98
2001-10-07 10:04:18 +00:00
John Baldwin
bf2965ed32 Disable the check in icu_setup() to see if a handler was already used as
the current interrupt thread routines will guarantee the condition this is
checking for at a higher level but inthand_add() and inthand_remove() as
they currently exist don't satisfy this condition.  (Which does need to be
fixed but which will take a bit more work.)  This fixes shared interrupts.
2001-09-27 19:03:52 +00:00
Jonathan Lemon
fe16674a74 Return EINVAL if the passed intr is out of bounds.
PR: 30857
Submitted by: David Xu <davidx@viasoft.com.cn>
MFC: 1 week
2001-09-27 02:46:47 +00:00
Brooks Davis
2862fc7a49 Call securelevel_gt with a credential. Also, s/p/td->td_proc/.
Submitted by:	LINT
2001-09-26 22:02:01 +00:00
Robert Watson
ce3a32b6da o Modify pcvt ioctl() security checks to use securelevel_gt() instead
of direct securelevel variable checks.  (Yet another API to perform
  direct hardware I/O using KDENABIO.)

Obtained from:	TrustedBSD Project
2001-09-26 20:21:28 +00:00
Robert Watson
9997f52470 o Modify spigot_open() to use securelevel_gt() instead of direct
securelevel variable checks.

Obtained from:	TrustedBSD Project
2001-09-26 20:20:05 +00:00
Julian Elischer
f5b93d4aac Remove accidentally included debug stuff.
Noticed by:	jhb
2001-09-18 22:52:42 +00:00
John Baldwin
659209e636 Whitespace fixes. 2001-09-18 21:05:04 +00:00
Warner Losh
8b8a72ee71 s/thread'/thread's/ 2001-09-14 04:40:44 +00:00
Julian Elischer
b40ce4165d KSE Milestone 2
Note ALL MODULES MUST BE RECOMPILED
make the kernel aware that there are smaller units of scheduling than the
process. (but only allow one thread per process at this time).
This is functionally equivalent to teh previousl -current except
that there is a thread associated with each process.

Sorry john! (your next MFC will be a doosie!)

Reviewed by: peter@freebsd.org, dillon@freebsd.org

X-MFC after:    ha ha ha ha
2001-09-12 08:38:13 +00:00
Mitsuru IWASAKI
db2077f8e1 Reenable RTC interrupts after wakeup. Some laptops have a problem
with system statistics monitoring tools (such as systat, vmstat...)
because of stopping RTC interrupts generation.
Restore all the timers (RTC and i8254) atomically.

Reviewed by:	bde
MFC after:	1 week
2001-09-04 16:02:06 +00:00
Mike Smith
91bca55f68 Revert previous "fix"; bus mice still have to be manually probed even in
the presence of PnP data.

Submitted by:	yokota
2001-08-31 02:14:34 +00:00
Mike Smith
5f063c7b09 Add ACPI attachments. 2001-08-30 09:17:03 +00:00
Mike Smith
7b4d3c8814 Correct usage of ISA_PNP_PROBE 2001-08-30 09:16:53 +00:00
John Baldwin
e5dfa86a70 Axe a commented, unused #define related to the old giant lock. 2001-08-24 16:52:31 +00:00
John Baldwin
134b29765c INTREN() and INTRDIS() have been MP safe for a while. Don't say that they
are "soon to be" MP safe in the comments.
2001-08-24 16:51:47 +00:00
Peter Wemm
3b703181e3 Dont compile in SSE fxsave/fxrstor instructions if CPU_ENABLE_SSE isn't
active.
2001-08-23 01:03:56 +00:00
Bruce Evans
807ef07ea1 Fixed minor numbers when there is more than one cy card.
PR:		19256
Submitted by:	initial version by yokota
MFC after:	1 week
2001-08-13 10:52:15 +00:00
Bruce Evans
0ce18d0354 Use ttymalloc() instead of a static array of `struct tty'. This will
be a regression until `pstat -t' actually understands the results of
ttymalloc().

Submitted by:	mostly by yokota
2001-08-13 07:00:21 +00:00
John Baldwin
0f345c4054 Add an optimization where we check hte PS_ASTPENDING and PS_NEEDRESCHED
flags with interrupts disabled to see if we should call ast() during
doreti.  This was mostly submitted by Bruce, but his original patch did
the looping in ast() in assembly rather than in the ast() function itself.
Once we've actually called into the ast() function, it's cheaper to just
loop inside the function rather than returning from the function,
performing the check, and then calling the function again.  However, we
can optimize the first check to avoid calling the function at all.
Other architectures may choose to implement this optimization if they
wish but it is not required for correct operation.

Submitted by:	bde
2001-08-10 23:00:07 +00:00
John Baldwin
688ebe120c - Close races with signals and other AST's being triggered while we are in
the process of exiting the kernel.  The ast() function now loops as long
  as the PS_ASTPENDING or PS_NEEDRESCHED flags are set.  It returns with
  preemption disabled so that any further AST's that arrive via an
  interrupt will be delayed until the low-level MD code returns to user
  mode.
- Use u_int's to store the tick counts for profiling purposes so that we
  do not need sched_lock just to read p_sticks.  This also closes a
  problem where the call to addupc_task() could screw up the arithmetic
  due to non-atomic reads of p_sticks.
- Axe need_proftick(), aston(), astoff(), astpending(), need_resched(),
  clear_resched(), and resched_wanted() in favor of direct bit operations
  on p_sflag.
- Fix up locking with sched_lock some.  In addupc_intr(), use sched_lock
  to ensure pr_addr and pr_ticks are updated atomically with setting
  PS_OWEUPC.  In ast() we clear pr_ticks atomically with clearing
  PS_OWEUPC.  We also do not grab the lock just to test a flag.
- Simplify the handling of Giant in ast() slightly.

Reviewed by:	bde (mostly)
2001-08-10 22:53:32 +00:00
John Baldwin
c6da9f6a8c - Fix a comment.
- Whitespace fixes.

Submitted by:	bde
2001-08-04 20:43:48 +00:00
Peter Wemm
3e02a8711a MASK_FPU_SW didn't do what it was expected to do. 2001-07-26 23:47:04 +00:00
Takanori Watanabe
6161544ca7 Add ACPI S2-S4BIOS Suspend/Resume code.
Some problems may remain.

Reviewed by:iwasaki
2001-07-20 06:07:34 +00:00
Tor Egge
e55bc0a096 The per-cpu temporary buffers are not needed since the pcb_save areas have
the proper alignment.  Change dummy variable in npxinit from stack to bss
to ensure proper alignment.

Reviewed by:	bde
2001-07-17 13:06:47 +00:00
Tor Egge
a5d00fe997 Use PCPU_GET(cpuid) instead of curproc->p_oncpu.
Reviewed by:	peter
2001-07-16 06:00:23 +00:00
Peter Wemm
ad1b7ffaee Fix another missed pcb_savefpu reference (inside NPX_DEBUG) 2001-07-12 12:21:53 +00:00
Peter Wemm
9d146ac5d1 Activate SSE/SIMD. This is the extra context switching support that
we are required to do if we let user processes use the extra 128 bit
registers etc.

This is the base part of the diff I got from:
  http://www.issei.org/issei/FreeBSD/sse.html
I believe this is by:  Mr. SUZUKI Issei <issei@issei.org>
SMP support apparently by: Takekazu KATO <kato@chino.it.okayama-u.ac.jp>
Test code by: NAKAMURA Kazushi <kaz@kobe1995.net>, see
  http://kobe1995.net/~kaz/FreeBSD/SSE.en.html

I have fixed a couple of style(9) deviations.  I have some followup
commits to fix a couple of non-style things.
2001-07-12 06:32:51 +00:00
Matthew Dillon
0cddd8f023 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.
2001-07-04 16:20:28 +00:00
Warner Losh
cf8a1123e4 Move wl driver to dev/wl. Repo copied to dev/wl, the old copies
removed and a minimal number of changes to make it compile in the new
location.

# I have a fully converted on a disk that may be crashed.  If it is
# crashed, I'll redo the work.
2001-07-02 05:58:47 +00:00
Warner Losh
4442d34e46 Repo copy i82586.h to dev/ic/i82586.h.
This file currently is very ie specific, but I have plans to change
that...
2001-07-02 05:29:58 +00:00
Warner Losh
1b0a8621e6 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.
2001-06-30 05:29:11 +00:00
Warner Losh
3b59d6c9db Remove file that hasn't been used since ze/zp. 2001-06-29 18:06:22 +00:00
John Baldwin
6be523bca7 Add a new MI pointer to the process' trapframe p_frame instead of using
various differently named pointers buried under p_md.

Reviewed by:	jake (in principle)
2001-06-29 11:10:41 +00:00
Yoshihiro Takahashi
6c551e8d24 Don't assume that resource type is ioport and rid equal 0. 2001-06-17 13:33:59 +00:00
Peter Wemm
e9813a0763 Fix warnings:
585: warning: missing braces around initializer
605: warning: missing braces around initializer
2001-06-15 07:56:36 +00:00
Peter Wemm
17e904e08d Fix warnings:
908: warning: long unsigned int format, unsigned int arg (arg 3)
887: warning: `timezero' defined but not used
2001-06-15 07:53:20 +00:00
Yoshihiro Takahashi
eb975db359 Removed unused files. 2001-06-14 11:15:00 +00:00
Yoshihiro Takahashi
5c936ade5b Correct typo. 2001-06-14 11:09:11 +00:00
Yoshihiro Takahashi
38b70454e3 Moved the wd33c93 specific file to sys/dev/ic. 2001-06-14 11:05:48 +00:00
Peter Wemm
2398f0cd1d 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.
2001-06-12 09:40:04 +00:00
Yoshihiro Takahashi
50cece92e1 Move the files from i386/isa/ic/ to dev/ic/. 2001-06-10 04:28:39 +00:00
Hellmuth Michaelis
a272144a13 PR: i386/26347
Submitted by:	Nicola Vitale <nivit@libero.it>
Reviewed by:	hm
Fix screen number display in HP mode in case PCVT_NSCREENS > 10
2001-06-05 15:31:47 +00:00
Thomas Moestl
d279178df7 Clean up the code exporting interrupt statistics via sysctl a bit:
- move the sysctl code to kern_intr.c
- do not use INTRCNT_COUNT, but rather eintrcnt - intrcnt to determine
  the length of the intrcnt array
- move the declarations of intrnames, eintrnames, intrcnt and eintrcnt
  from machine-dependent include files to sys/interrupt.h
- remove the hw.nintr sysctl, it is not needed.
- fix various style bugs

Requested by:	bde
Reviewed by:	bde (some time ago)
2001-06-01 13:23:28 +00:00
Alfred Perlstein
b99c886a7f lock vm while playing with pmap 2001-05-23 22:13:58 +00:00
Bruce Evans
1c1771cb5b Convert npx interrupts into traps instead of vice versa. This is much
simpler for npx exceptions that start as traps (no assembly required...)
and works better for npx exceptions that start as interrupts (there is
no longer a problem for nested interrupts).

Submitted by:	original (pre-SMPng) version by luoqi
2001-05-22 21:20:49 +00:00
Bruce Evans
17008f5343 Throw away the complications in npxsave() and their infrastructure.
npxsave() went to great lengths to excecute fnsave with interrupts
enabled in case executing it froze the CPU.  This case can't happen,
at least for Intel CPU/NPX's.  Spurious IRQ13's don't imply spurious
freezes.  Anyway, the complications were usually no-ops because IRQ13
is not used on i486's and newer CPUs, and because SMPng broke them in
rev.1.84.  Forcible enabling of interrupts was changed to
write_eflags(old_eflags), but since SMPng usually calls npxsave() from
cpu_switch() with interrupts disabled, write_eflags() usually just
kept interrupts disabled.
2001-05-20 20:04:40 +00:00
Bruce Evans
7010278935 Use a critical region to protect almost everything in npxinit().
npxinit() didn't have the usual race because it doesn't save to curpcb,
but it may have had a worse form of it since it uses the npx when it
doesn't "own" it.  I'm not sure if locking prevented this.  npxinit()
is normally caled with the proc lock but not sched_lock.

Use a critical region to protect pushing of curproc's npx state to
curpcb in npxexit().  Not doing so was harmless since it at worst
saved a wrong state to a dieing pcb.
2001-05-20 18:05:44 +00:00
John Baldwin
ddfbf9d259 - Axe the IMEN_BITS and APIC_IMEN_BITS constants.
- Add back in a definition of NHWI which is preferred over ICU_LEN.

Submitted by:	bde
2001-05-17 22:24:17 +00:00
John Baldwin
dec54ac5b5 "Sir, the deorbit burn completed succesfully."
RIP {sys/machine}/ipl.h.
2001-05-15 23:30:37 +00:00
John Baldwin
8bd57f8fc2 Remove unneeded includes of sys/ipl.h and machine/ipl.h. 2001-05-15 23:22:29 +00:00
John Baldwin
4966b0e91c Move the definition of HWI_MASK to the i386/isa/icu.h header right next to
the definition of ICU_LEN.
2001-05-15 23:11:48 +00:00
John Baldwin
d008c720b6 - Use ICU_LEN rather than NHWI for the size of the array of ithreads.
- Remove unneeded include of sys/ipl.h.
2001-05-15 22:31:08 +00:00
Bruce Evans
79d4e25bea Fixed panics in npx exception handling. When using IRQ13 exception
handling, SMPng always switches the npx context away from curproc
before calling the handler, so the handler always paniced.  When using
exception 16 exception handling, SMPng sometimes switches the npx
context away from curproc before calling the handler, so the handler
sometimes paniced.  Also, we didn't lock the context while using it,
so we sometimes didn't detect the switch and then paniced in a less
controlled way.

Just lock the context while using it, and return without doing anything
except clearing the busy latch if the context is not for curproc.  This
fixes the exception 16 case and makes the IRQ13 case harmless.  In both
cases, the instruction that caused the exception is restarted and the
exception repeats.  In the exception 16 case, we soon get an exception
that can be handled without doing anything special.  In the IRQ13 case,
we get an easy to kill hung process.
2001-05-02 13:06:58 +00:00
Mark Murray
fb919e4d5a Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
other "system" header files.

Also help the deprecation of lockmgr.h by making it a sub-include of
sys/lock.h and removing sys/lockmgr.h form kernel .c files.

Sort sys/*.h includes where possible in affected files.

OK'ed by:	bde (with reservations)
2001-05-01 08:13:21 +00:00
John Baldwin
4d4bc9acc6 Add in a missing call to forward_hardclock() in the SMP case.
Submitted by:	bde
2001-04-28 01:37:44 +00:00
John Baldwin
6caa8a1501 Overhaul of the SMP code. Several portions of the SMP kernel support have
been made machine independent and various other adjustments have been made
to support Alpha SMP.

- It splits the per-process portions of hardclock() and statclock() off
  into hardclock_process() and statclock_process() respectively.  hardclock()
  and statclock() call the *_process() functions for the current process so
  that UP systems will run as before.  For SMP systems, it is simply necessary
  to ensure that all other processors execute the *_process() functions when the
  main clock functions are triggered on one CPU by an interrupt.  For the alpha
  4100, clock interrupts are delievered in a staggered broadcast fashion, so
  we simply call hardclock/statclock on the boot CPU and call the *_process()
  functions on the secondaries.  For x86, we call statclock and hardclock as
  usual and then call forward_hardclock/statclock in the MD code to send an IPI
  to cause the AP's to execute forwared_hardclock/statclock which then call the
  *_process() functions.
- forward_signal() and forward_roundrobin() have been reworked to be MI and to
  involve less hackery.  Now the cpu doing the forward sets any flags, etc. and
  sends a very simple IPI_AST to the other cpu(s).  AST IPIs now just basically
  return so that they can execute ast() and don't bother with setting the
  astpending or needresched flags themselves.  This also removes the loop in
  forward_signal() as sched_lock closes the race condition that the loop worked
  around.
- need_resched(), resched_wanted() and clear_resched() have been changed to take
  a process to act on rather than assuming curproc so that they can be used to
  implement forward_roundrobin() as described above.
- Various other SMP variables have been moved to a MI subr_smp.c and a new
  header sys/smp.h declares MI SMP variables and API's.   The IPI API's from
  machine/ipl.h have moved to machine/smp.h which is included by sys/smp.h.
- The globaldata_register() and globaldata_find() functions as well as the
  SLIST of globaldata structures has become MI and moved into subr_smp.c.
  Also, the globaldata list is only available if SMP support is compiled in.

Reviewed by:	jake, peter
Looked over by:	eivind
2001-04-27 19:28:25 +00:00
John Baldwin
33a9ed9d0e Change the pfind() and zpfind() functions to lock the process that they
find before releasing the allproc lock and returning.

Reviewed by:	-smp, dfr, jake
2001-04-24 00:51:53 +00:00
John Baldwin
adccbaa77d People are still having problems with i586_* on UP machines and SMP
machines, so just hack it to disable them for now until it can be fixed.

Inspired by hair pulling of:	asmodai
2001-04-13 17:14:53 +00:00
John Baldwin
ca7ef17c08 Remove the BETTER_CLOCK #ifdef's. The code is on by default and is here
to stay for the foreseeable future.

OK'd by:	peter (the idea)
2001-04-10 21:34:13 +00:00
Peter Wemm
37c9e8eebd Typo fix. s/criticale_t/critical_t/ 2001-03-28 14:54:28 +00:00
John Baldwin
f34fa851e0 Catch up to header include changes:
- <sys/mutex.h> now requires <sys/systm.h>
- <sys/mutex.h> and <sys/sx.h> now require <sys/lock.h>
2001-03-28 09:17:56 +00:00
John Baldwin
0006681fe6 Switch from save/disable/restore_intr() to critical_enter/exit(). 2001-03-28 03:06:10 +00:00
Poul-Henning Kamp
f83880518b Send the remains (such as I have located) of "block major numbers" to
the bit-bucket.
2001-03-26 12:41:29 +00:00
Thomas Moestl
368d2edce4 Export intrnames and intrcnt as sysctls (hw.nintr, hw.intrnames and
hw.intrcnt).

Approved by:	rwatson
2001-03-23 03:45:17 +00:00
Dag-Erling Smørgrav
a6221d8c82 Show the bzero() bandwidth in kBps instead of Bps; use u_int32_t instead
of long and int64_t; and print the result as an unsigned long. This should
make the output from the bzero() test more readable, and avoid printing a
negative bandwidth. Note that this doesn't change the decision process,
since that is based on time elapsed, not on computed bandwidth.
2001-03-19 00:28:04 +00:00
John Baldwin
19eb87d22a Grab the process lock while calling psignal and before calling psignal. 2001-03-07 03:37:06 +00:00
John Baldwin
ae383d0cc7 Don't enable interrupts before calling sched_ithd for threaded interrupts.
Tested by:	obrien
2001-03-05 04:37:54 +00:00
Jonathan Lemon
2b99d4f013 In ascpoll, return revents, not 0. 2001-03-01 03:21:16 +00:00
Jake Burkholder
02318dac2c Remove the leading underscore from all symbols defined in x86 asm
and used in C or vice versa.  The elf compiler uses the same names
for both.  Remove asnames.h with great prejudice; it has served its
purpose.

Note that this does not affect the ability to generate an aout kernel
due to gcc's -mno-underscores option.

moral support from:	peter, jhb
2001-02-25 06:29:04 +00:00
John Baldwin
4c8ccdab0f Remove undefined and unreferenced doreti_syscall_ret globl. While I'm
here, adjust comment block above doreti.  We don't have the old MP lock
anymore.
2001-02-23 00:41:05 +00:00
John Baldwin
f308e0d714 - Change ast() to take a pointer to a trapframe like other architectures.
- Don't use an atomic operation to update cnt.v_soft in ast().  This is
  the only place the variable is written to, and sched_lock is always
  held when it is written, so it is already protected and the mutex release
  of sched_lock asserts a memory barrier that ensures the value will be
  updated in a timely fashion.
2001-02-22 18:05:15 +00:00
John Baldwin
3e5da75445 - Add a new ithread_schedule() function to do the bulk of the work of
scheduling an interrupt thread to run when needed.  This has the side
  effect of enabling support for entropy gathering from interrupts on
  all architectures.
- Change the software interrupt and x86 and alpha hardware interrupt code
  to use ithread_schedule() for most of their processing when scheduling
  an interrupt to run.
- Remove the pesky Warning message about interrupt threads having entropy
  enabled.  I'm not sure why I put that in there in the first place.
- Add more error checking for parameters and change some cases that
  returned EINVAL to panic on failure instead via KASSERT().
- Instead of doing a documented evil hack of setting the P_NOLOAD flag
  on every interrupt thread whose pri was SWI_CLOCK, set the flag
  explicity for clk_ithd's proc during start_softintr().
2001-02-20 10:25:29 +00:00
Bruce Evans
0ad74739ac Removed all traces of T_ASTFLT (except for gaps where it was). It became
unused except in dead code when ast() was split off from trap().
2001-02-19 15:47:38 +00:00
Bruce Evans
12a586bbda Fixed style bugs in clock.c rev.1.164 and cpu.h rev.1.52-1.53 -- declare
tsc_present in the right places (together with other variables of the
same linkage), and don't use messy ifdefs just to avoid exporting it in
some cases.
2001-02-19 03:00:34 +00:00
Mark Murray
2564fe499d Allow the superuser to prefent all interrupt harvesting on
her system.
2001-02-18 17:47:55 +00:00
Jonathan Lemon
608a3ce62a Extend kqueue down to the device layer.
Backwards compatible approach suggested by: peter
2001-02-15 16:34:11 +00:00
Mark Murray
d888fc4e73 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
2001-02-11 10:44:09 +00:00
John Baldwin
e990501c21 Re-enable preemption on interrupts. My last commit accidentally reverted
it as I was playing with some other ways of doing kernel preemption.
2001-02-10 02:41:50 +00:00
John Baldwin
142ba5f3d7 - Make astpending and need_resched process attributes rather than CPU
attributes.  This is needed for AST's to be properly posted in a preemptive
  kernel.  They are backed by two new flags in p_sflag: PS_ASTPENDING and
  PS_NEEDRESCHED.  They are still accesssed by their old macros:
  aston(), astoff(), etc.  For completeness, an astpending() macro has been
  added to check for a pending AST, and clear_resched() has been added to
  clear need_resched().
- Rename syscall2() on the x86 back to syscall() to be consistent with
  other architectures.
2001-02-10 02:20:34 +00:00
John Baldwin
16d92c70f1 Revert the spin mutex for the cy(4) driver.
Requested by:	bde
2001-02-09 22:37:24 +00:00
John Baldwin
5ee2dd82a9 Catch up to the new swi API. 2001-02-09 18:35:53 +00:00
John Baldwin
6221adac84 - Use a spin mutex instead of COM_LOCK, since COM_LOCK is going away.
The same name from the sio(4) driver was used and an appropriate
  dictionary item added at the top to reduce diffs.
- Catch up to the new swi API.
2001-02-09 17:55:32 +00:00
John Baldwin
5781f5419e Catch up to changes to inthand_add(). 2001-02-09 17:48:33 +00:00
John Baldwin
2e0c76cd20 Use the MI ithread helper functions in the x86 interrupt code. 2001-02-09 17:47:44 +00:00
John Baldwin
40bcb55186 Remove unused forward_irq counters. 2001-02-09 14:30:03 +00:00
Bosko Milekic
9ed346bab0 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)
2001-02-09 06:11:45 +00:00
Jeroen Ruigrok van der Werven
2fa72ea7d4 Fix typo: compatability -> compatibility.
Compatability is not an existing english word.
2001-02-06 12:05:58 +00:00
Poul-Henning Kamp
6817526d14 Convert if_multiaddrs from LIST to TAILQ so that it can be traversed
backwards in the three drivers which want to do that.

Reviewed by:    mikeh
2001-02-06 10:12:15 +00:00
Poul-Henning Kamp
37d4006626 Another round of the <sys/queue.h> FOREACH transmogriffer.
Created with:   sed(1)
Reviewed by:    md5(1)
2001-02-04 16:08:18 +00:00
Poul-Henning Kamp
fc2ffbe604 Mechanical change to use <sys/queue.h> macro API instead of
fondling implementation details.

Created with: sed(1)
Reviewed by: md5(1)
2001-02-04 13:13:25 +00:00
Poul-Henning Kamp
e1d756ce2a Remove the LABPC driver.
Doesn't work, no maintainer, more promising code exists elsewhere.
2001-02-04 11:18:15 +00:00
Poul-Henning Kamp
c8f71496f7 Use macro API to <sys/queue.h> 2001-02-04 10:34:45 +00:00
Jake Burkholder
05f6ee66ea Implement preemptive scheduling of hardware interrupt threads.
- If possible, context switch to the thread directly in sched_ithd(),
  rather than triggering a delayed ast reschedule.

- Disable interrupts while restoring fpu state in the trap handler,
  in order to ensure that we are not preempted in the middle, which
  could cause migration to another cpu.

Reviewed by:	peter
Tested by:	peter (alpha)
2001-02-01 03:34:20 +00:00
Bruce Evans
a89bda90b1 Added used include of <sys/mutex.h>. The SMP case was broken by
incompletely converting simplelocks to mutexes (COM_LOCK() is supposed
to hide the SMP locking internals, but it now depends on mutex interfaces
being visible).
2001-01-30 17:05:58 +00:00
John Hay
8a6d185698 The ar and sr devices have moved to sys/dev/. 2001-01-30 10:05:44 +00:00
John Hay
ec2dd907f0 This include file has found a new home in sys/dev/ic/. 2001-01-30 10:04:25 +00:00
Peter Wemm
55063c26c1 Style (whitespace) nit. 2001-01-30 09:44:37 +00:00
Peter Wemm
920c17857f Stop counting sppp interfaces, we were just testing its presence to give
a warning if it was missing.
2001-01-29 12:27:46 +00:00
Peter Wemm
f444a0efe9 Convert mca (microchannel bus support) from something that we count
(bogus) to something that we test for the presence of.
2001-01-29 11:57:27 +00:00
Peter Wemm
03927d3c33 Send "#if NISA > 0" to the bit-bucket and replace it with an option.
These were compile-time "is the isa code present?" tests and not
'how many isa busses' tests.
2001-01-29 09:38:39 +00:00
Jake Burkholder
07ce8269b1 Clear intr_nesting_level when an interrupt thread has no more
handlers and wants to exit, so it doesn't panic in exit1()
which malloc()s with M_WAITOK.

Reported by:	Bob Bishop <rb@gid.co.uk>
2001-01-28 17:20:11 +00:00
John Hay
b2952b0aa4 Newbusify ar(4). 2001-01-24 18:45:29 +00:00
John Baldwin
bb4b2d8b2a Remove the Xforward_irq IPI. 2001-01-24 10:01:13 +00:00