Commit Graph

3186 Commits

Author SHA1 Message Date
Julian Elischer
b6d5995e5f Add some locking asserts and some comments 2002-07-24 23:21:05 +00:00
Peter Wemm
b618108fff de-count pci 2002-07-23 06:38:47 +00:00
Peter Wemm
fc147d7fe9 Add explicit unit count on 'device pci' for ahc/ahd 2002-07-21 23:07:31 +00:00
Warner Losh
e300f53ca2 style(9)ize the whole file
Approved in concept a long time ago by: msmith
2002-07-21 05:35:42 +00:00
Peter Wemm
e344afe7c9 Move SWTCH_OPTIM_STATS related code out of cpufunc.h. (This sort of stat
gathering is not an x86 cpu feature)
2002-07-21 05:22:16 +00:00
Peter Wemm
db27052e18 Regenerate 2002-07-20 02:56:34 +00:00
Peter Wemm
3ebc124838 Infrastructure tweaks to allow having both an Elf32 and an Elf64 executable
handler in the kernel at the same time.  Also, allow for the
exec_new_vmspace() code to build a different sized vmspace depending on
the executable environment.  This is a big help for execing i386 binaries
on ia64.   The ELF exec code grows the ability to map partial pages when
there is a page size difference, eg: emulating 4K pages on 8K or 16K
hardware pages.

Flesh out the i386 emulation support for ia64.  At this point, the only
binary that I know of that fails is cvsup, because the cvsup runtime
tries to execute code in pages not marked executable.

Obtained from:  dfr (mostly, many tweaks from me).
2002-07-20 02:56:12 +00:00
Alan Cox
4aca0b1510 o Use vm_page_alloc(... | VM_ALLOC_WIRED) in place of vm_page_wire(). 2002-07-19 19:35:06 +00:00
Andrew Gallatin
f76ec8facd Add support for probing secondary buses on the ServerWorks Grand Champion
chipset used for P4-Xeon machines

PR: kern/38894
Tested-by: "Marc G. Fournier" <scrappy@hub.org>
Submitted-by: Mark Tinguely (partially)
2002-07-19 18:35:08 +00:00
Mark Murray
4c5aee92a7 Beautify. This has the side effect of improving portability and
making lint work cleaner.

Inspired to do this by:	jhb
2002-07-18 15:56:46 +00:00
Poul-Henning Kamp
61658cf6a1 Add initialization code for the AMD Elan sc520 which maps the MMCR
into KVM and sets the i8254 frequency to the correct value.
2002-07-18 12:56:54 +00:00
Poul-Henning Kamp
3ae87b7ec6 Add an entry for the AMD Elan SC520 hostbridge. I do not belive we can
identify this gadget on the CPUID result alone, so I intend to activate
the necessary magic (i8254 frequency for instance) for it based on the
precense of the on-chip host to PCI bridge.
2002-07-18 10:57:20 +00:00
Peter Wemm
a9aa1a970f Use pmap_kenter() rather than vtopte() and bashing the page tables
directly.
2002-07-18 00:42:53 +00:00
Peter Wemm
d08c48b48a Avoid trying to set PG_G on the first 4MB when we set up the 4MB page.
This solves the SMP panic for at least one system.  I'd still like to know
why my xeon works though.

Tested by: bmilekic
2002-07-17 21:47:05 +00:00
Mark Murray
8306a37bbb Clean up the syntax WRT semicolons at the end of function-like-macros, and protect GCCisms from non-GNU compilers and lint. 2002-07-17 16:19:37 +00:00
Matthew Dillon
d4616eacb1 Qualify comment on machdep.cpu_idle_hlt. Turning this on on a SMP
machine will result in approximately a 4.2% loss of performance (buildworld)
and approximately a 5% reduction in power consumption (when idle).  Add XXX
note on how to really make hlt work (send an IPI to wakeup HLTed cpus on
a thread-schedule event?  Generate an interrupt somehow?).
2002-07-17 05:41:43 +00:00
John Baldwin
dde0429505 Various comment and minor style fixes. No actual content changes.
Inspired by:	bde
2002-07-16 18:20:17 +00:00
Mark Murray
e9b24da3d5 Retire the perl gethints.conf in favour of an awk version. Move
the awk version to a central place for maintenance.

Submitted by:	Cyrille Lefevre <cyrille.lefevre@laposte.net>
2002-07-16 09:28:25 +00:00
Peter Wemm
239d85c5ad The pmap_invalidate_all() here is definately not a good idea. We are
running with interrupts disabled, other cpus locked down, and only
making a temporary local mapping that we immediately back out again.

Tested by:	gallatin
2002-07-15 23:11:49 +00:00
John Baldwin
557c19bff3 makeLINT.send has been moved to sys/conf so we can build LINT on other
architectures besides i386.
2002-07-15 17:48:47 +00:00
Mark Murray
80a0ead4fe Wrap GNU specific code in ifdefs, and help lint out by providing
some alternative definitions.
2002-07-15 13:29:40 +00:00
Mark Murray
7e622d3c84 Cast to prevent "signed/unsigned comparison" warnings. 2002-07-15 13:27:43 +00:00
Mark Murray
bbcfaa6aa0 Warnings and lint-assisting fixes; mark unused function parameters as
unused; wrap GNUisms (asm code) in appropriate #ifdefs.
2002-07-15 13:25:15 +00:00
Alan Cox
700399bc41 o Lock page queue accesses by vm_page_wire(). 2002-07-14 20:24:40 +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
5c5e3622e6 Two invlpg's slipped through that were not protected from I386_CPU
Pointed out by:	dillon
2002-07-13 21:55:11 +00:00
Peter Wemm
96fd5002b4 invlpg() does not work too well on i386 cpus. Add token i386 support
back in to the pmap_zero_page* stuff.
2002-07-13 21:03:08 +00:00
Peter Wemm
006490441d Do global shootdowns when switching to/from 4MB pages. I believe we can
do a shootdown on a 4MB "page" though, but this should be safer for now.

Noticed by:  tegge
2002-07-13 20:58:56 +00:00
Peter Wemm
a7b1f16c86 Bandaid for SMP. Changing APTDpde without a global shootdown is not
safe yet.  We used to do a global shootdown here anyway so another day
or so shouldn't hurt.
2002-07-13 20:56:18 +00:00
Alan Cox
753492f404 o Lock some page queue accesses, in particular, those by vm_page_unwire(). 2002-07-13 19:48:54 +00:00
Jonathan Mini
08b38412c8 Add additional cred_free_thread() calls that I had missed the first time.
Pointed out by:	jhb
2002-07-13 04:36:50 +00:00
Matthew Dillon
fbcf77c2ea Re-enable the idle page-zeroing code. Remove all IPIs from the idle
page-zeroing code as well as from the general page-zeroing code and use a
lazy tlb page invalidation scheme based on a callback made at the end
of mi_switch.

A number of people came up with this idea at the same time so credit
belongs to Peter, John, and Jake as well.

Two-way SMP buildworld -j 5 tests (second run, after stabilization)
    2282.76 real  2515.17 user  704.22 sys	before peter's IPI commit
    2266.69 real  2467.50 user  633.77 sys	after peter's commit
    2232.80 real  2468.99 user  615.89 sys	after this commit

Reviewed by:	peter, jhb
Approved by:	peter
2002-07-12 20:17:06 +00:00
John Baldwin
33d7ad1abe Set the thread state of the newly chosen to run thread to TDS_RUNNING in
choosethread() in MI C code instead of doing it in in assembly in all the
various cpu_switch() functions.  This fixes problems on ia64 and sparc64.

Reviewed by:	julian, peter, benno
Tested on:	i386, alpha, sparc64
2002-07-12 18:34:22 +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
Alfred Perlstein
074453c230 Introduce syscall.master option 'COMPAT4' which allows one to wrap
syscalls for FreeBSD 4 compatibility.
Add kernel option COMPAT_FREEBSD4 to enable these syscalls.
2002-07-12 06:38:34 +00:00
Peter Wemm
4a0226c633 Unexpand a couple of 8-space indents that I added in rev 1.285. 2002-07-12 04:58:51 +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
83587634ec fix a comment and note a problem with XXXSMP 2002-07-10 21:17:23 +00:00
Matthew Dillon
50b6a55512 Remove the critmode sysctl - the new method for critical_enter/exit (already
the default) is now the only method for i386.

Remove the paraphanalia that supported critmode.  Remove td_critnest, clean
up the assembly, and clean up (mostly remove) the old junk from
cpu_critical_enter() and cpu_critical_exit().
2002-07-10 20:15:58 +00:00
David E. O'Brien
b8e7c5a8e1 Consistently line-up /**/ comments so they don't cause line wrappage. 2002-07-10 19:36:04 +00:00
Julian Elischer
f55348f07c Include all of isa/ipl.s into exception.s as there is now nothing left in
ipl.s except doreti which really belongs in with the exceptions as it's
just the other side of the same coin. Will remove ipl.s in a separate commit.

Agreed by: several including bde@freebsd.org
2002-07-10 02:24:44 +00:00
Mark Murray
8d03e1e931 Comment out apm; ACPI is the modern replacement, and folks who really
need it can uncomment it. This may buy us some kernel space.

Discussed with:	imp & msmith (quite a while ago)
2002-07-08 11:56:44 +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
fcdc053233 Cosmetic. Remove #if 0 definition of vtophys() - it predates 4MB pages.
Remove avtophys(), it isn't referenced anywhere.
2002-07-08 08:14:28 +00:00
Peter Wemm
a58b3a6878 Add a special page zero entry point intended to be called via the single
threaded VM pagezero kthread outside of Giant.  For some platforms, this
is really easy since it can just use the direct mapped region.  For others,
IPI sending is involved or there are other issues, so grab Giant when
needed.

We still have preemption issues to deal with, but Alan Cox has an
interesting suggestion on how to minimize the problem on x86.

Use Luigi's hack for preserving the (lack of) priority.

Turn the idle zeroing back on since it can now actually do something useful
outside of Giant in many cases.
2002-07-08 04:24:26 +00:00
Peter Wemm
19981bcd54 s/procrunnable/kserunnable/ in a comment 2002-07-08 01:52:55 +00:00
Peter Wemm
64ca701084 Fix a hideous TLB bug. pmap_unmapdev neglected to remove the device
mappings from the page tables, which were mapped with PG_G!  We could
reuse the page table entry for another mapping (pmap_mapdev) but it
would never have cleared any remaining PG_G TLB entries.
2002-07-08 00:17:43 +00:00
Peter Wemm
a136efe9b6 Collect all the (now equivalent) pmap_new_proc/pmap_dispose_proc/
pmap_swapin_proc/pmap_swapout_proc functions from the MD pmap code
and use a single equivalent MI version.  There are other cleanups
needed still.

While here, use the UMA zone hooks to keep a cache of preinitialized
proc structures handy, just like the thread system does.  This eliminates
one dependency on 'struct proc' being persistent even after being freed.
There are some comments about things that can be factored out into
ctor/dtor functions if it is worth it.  For now they are mostly just
doing statistics to get a feel of how it is working.
2002-07-07 23:05:27 +00:00
Warner Losh
22c0046f53 Make NEWCARD the default pccard/cardbus system. 2002-07-07 19:00:00 +00:00