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Commit Graph

454 Commits

Author SHA1 Message Date
Robert Watson
92b98fdabe Remove WITNESS from GENERIC by default: as we grow more locks, this gets
slower, and may be impeding adoption of -CURRENT by developers.  We
recommend turning on WITNESS by default on crash boxes, and when doing
locking development.  It will probably get turned on by default for a week
or two following any major locking commits, also.

Approved by:	all and sundry (jhb, phk, ...)
2002-02-13 07:44:59 +00:00
Julian Elischer
079b7badea Pre-KSE/M3 commit.
this is a low-functionality change that changes the kernel to access the main
thread of a process via the linked list of threads rather than
assuming that it is embedded in the process. It IS still embeded there
but remove all teh code that assumes that in preparation for the next commit
which will actually move it out.

Reviewed by: peter@freebsd.org, gallatin@cs.duke.edu, benno rice,
2002-02-07 20:58:47 +00:00
Poul-Henning Kamp
e0ee6f5629 GC the PC_SWITCH* symbols which are not used in assembly anymore. 2002-02-07 10:27:58 +00:00
Bruce Evans
55a9536b65 Compile osigreturn() unconditionally since it will always be needed on
some arches and the syscall table is machine-independent.  It was
(bogusly) conditional on COMPAT_43, so this usually makes no difference.

ia64: in addition:
- replace the bogus cloned comment before osigreturn() by a correct one.
  osigreturn() is just a stub fo ia64's.
- fix the formatting of cloned comment before sigreturn().
- fix the return code.  use nosys() instead of returning ENOSYS to get
  the same semantics as if the syscall is not in the syscall table.
  Generating SIGSYS is actually correct here.
- fix style bugs.

powerpc: copy the cleaned up ia64 stub.  This mainly fixes a bogus comment.

sparc64: copy the cleaned up the ia64 stub, since there was no stub before.
2002-02-01 15:44:03 +00:00
Marcel Moolenaar
57aace23d5 Add a definition of ddb_regs. ddb_regs is declared as extern in
db_machdep.h to fix the link failure (multiple definitions)
caused by disabling the emission of common symbols. As a result,
there were no definitions at all. While here, remove useless
declarations.
2002-01-18 07:55:23 +00:00
Marcel Moolenaar
7fdc2e1a11 Remove the definition of bootverbose. This fixes the link failure
caused by disabling the emission of common symbols.
2002-01-18 07:49:37 +00:00
Marcel Moolenaar
48ceef34eb Declare ddb_regs as extern to avoid creating a tentative definition.
This fixes the link failure caused by disabling the emission of
common symbols.
2002-01-18 07:47:38 +00:00
Peter Wemm
ead8168ac0 Convert a bunch of 1 << PCPU_GET(cpuid) to PCPU_GET(cpumask). 2002-01-05 09:41:37 +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
Marcel Moolenaar
200281abc1 Revert previous definition of cpu_throw(). Non-MP configurations
were broken as well.
2001-12-30 23:39:15 +00:00
Marcel Moolenaar
f3366cc25b Better implement SMP support:
o  Do not use a special struct to keep track of CPUs we found;
   instead, use struct pcpu. This handles all the magic WRT
   thread creation (yay!).
o  Respect MAXCPU.
o  Use the vhpt_base and vhpt_size values to initialize the AP.
o  Style fixes.

Note that this commit temporarily breaks SMP configurations.
Previously APs didn't do anything, but they now enter the
scheduler. They hold sched_lock for more than 5 secs though
and cause a panic. That's what I call progress :-)
2001-12-30 09:59:02 +00:00
Marcel Moolenaar
0f0658df4c o Reimplement map_pal_code to work with a global variable
ia64_pal_base instead of scanning the EFI tables. This way
   AP startup code can more easily use the function.
o  Initialize ia64_pal_base in ia64_init(). When the PAL code
   doesn't need explicit mapping or no PAL code has been found,
   ia64_pal_base will be 0.
o  Remove some unused global variables.
o  Also in ia64_init(), allocate only 1 page for struct pcpu
   and remove some Alpha leftovers.
o  Initialize pc_pcb in cpu_pcpu_init().
2001-12-30 09:49:39 +00:00
Marcel Moolenaar
7251648208 Make vhpt_base and vhpt_size globals so that they can be used by
the AP startup code.
2001-12-30 09:42:43 +00:00
Marcel Moolenaar
d9eba830b7 Cleanup the IPIs. 2001-12-30 09:41:29 +00:00
Marcel Moolenaar
9d31d833c2 Remove unused MD fields (pc_pending_ipis, pc_next_asn and
pc_current_asngen) and add SMP specific fields (pc_pcb,
pc_lid and pc_awake).
2001-12-30 09:39:41 +00:00
Marcel Moolenaar
badb73a5ba o Remove temporary implementation of cpu_throw in vm_machdep.c
and instead make it an alternate entry-point of cpu_switch()
   in swtch.s
o  Add SMP support to cpu_switch().
2001-12-30 09:34:51 +00:00
Marcel Moolenaar
45cc363828 Draft implementation of IPI handling. 2001-12-30 09:24:29 +00:00
Marcel Moolenaar
6dc3bd7b4c Add PC_IDLETHREAD. We need it in cpu_switch. 2001-12-30 09:23:10 +00:00
Marcel Moolenaar
7e3adc7d11 Add missing predicate in interruption_Data_TLB. Without this
predicate we never used the VHPT entry we found.

While here, normalize the compares.
2001-12-30 09:22:08 +00:00
Doug Rabson
e129a83e18 Fix CRITICAL_FORK so that it compiles. 2001-12-23 16:04:29 +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
Peter Wemm
ff5a52e18e Replace a bunch of:
for (pv = TAILQ_FIRST(&m->md.pv_list);
               pv;
               pv = TAILQ_NEXT(pv, pv_list)) {
with:
      TAILQ_FOREACH(pv, &m->md.pv_list, pv_list) {
2001-12-20 05:29:59 +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
Ian Dowse
1cb4661d56 Enable UFS_DIRHASH in the GENERIC kernel.
Suggested by:	silby
Reviewed by:	dillon
MFC after:	5 days
2001-12-14 16:27:11 +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
David E. O'Brien
acdff873d8 style(9) 2001-12-09 19:12:07 +00:00
Matthew Dillon
66a11b9fb1 Allow maxusers to be specified as 0 in the kernel config, which will
cause the system to auto-size to between 32 and 512 depending on the
amount of memory.

MFC after:	1 week
2001-12-09 01:57:09 +00:00
John Baldwin
aee9d2774f Add multiple inclusion protection. 2001-12-06 18:17:02 +00:00
Dag-Erling Smørgrav
3cdd7aa817 PROCFS requires PSEUDOFS. 2001-12-04 11:17:30 +00:00
Mike Barcroft
de2656d0ed o Stop abusing MD headers with non-MD types.
o Hide nonstandard functions and types in <netinet/in.h> when
  _POSIX_SOURCE is defined.
o Add some missing types (required by POSIX.1-200x) to <netinet/in.h>.
o Restore vendor ID from Rev 1.1 in <netinet/in.h> and make use of new
  __FBSDID() macro.
o Fix some miscellaneous issues in <arpa/inet.h>.
o Correct final argument for the inet_ntop() function (POSIX.1-200x).
o Get rid of the namespace pollution from <sys/types.h> in
  <arpa/inet.h>.

Reviewed by:		fenner
Partially submitted by:	bde
2001-12-01 03:43:01 +00:00
Doug Rabson
6759374681 * Don't use critical_enter/critical_exit when accessing the VHPT - its
pointless and would be inadequate for SMP systems. We will rely on the
  VM system's locks to serialise this for now.
* Change pmap_remove() so that if the range being removed is larger than
  the number of pages mapped by the pmap, we iterate over the currently
  mapped pages instead of over the virtual address range. This should
  make a difference when removing large virtual address ranges from an
  address space.
2001-11-30 10:07:54 +00:00
Doug Rabson
473ec8790d Minor tweaks to the TLB handling code - avoid movl instructions and add
itc.x instructions to attempt to avoid the little flurry of TLB exceptions
for handling access, dirty etc.
2001-11-27 09:49:53 +00:00
Peter Wemm
d65d6e5e21 s/code/ucode/ (last minute typo) 2001-11-19 08:06:56 +00:00
Peter Wemm
bc11d59b2a Initial cut at calling the EFI-provided FPSWA (Floating Point Software
Assist) driver to handle the "messy" floating point cases which
cause traps to the kernel for handling.
2001-11-19 07:25:42 +00:00
Peter Wemm
1ccc5e6c4e Use some (now) spare space for passing through a pointer to the FPSWA
Interface provided by EFI (Floating Point SoftWare Assist).
2001-11-19 07:07:09 +00:00
Peter Wemm
de76c8189e Remove bootinfo.bi_kernel. It isn't used by the kernel. struct bootinfo
should go away on ia64, we should be loader metadata based since that is
the only way we can boot (loader, skiload).
2001-11-19 07:05:10 +00:00
Peter Wemm
ab29f8765d Oops, I accidently merged a whitespace error from the original commit.
(whitespace at end of line in rev 1.264 pmap.c).  Fix them all.
2001-11-16 02:31:20 +00:00
Peter Wemm
303f52d500 Merge rev 1.264 from i386/pmap.c (tegge via alfred):
Protect against an infinite loop when prefaulting pages.  This can
happen when the vm system maps past the end of an object or tries
to map a zero length object, the pmap layer misses the fact that
offsets wrap into negative numbers and we get stuck.
2001-11-16 02:28:33 +00:00
Peter Wemm
88b5258822 Merge rev 1.202 from i386/pmap.c (back in 1998 by John Dyson):
Make flushing dirty pages work correctly on filesystems that
unexpectedly do not complete writes even with sync I/O requests.
This should help the behavior of mmaped files when using
softupdates (and perhaps in other circumstances also.)
2001-11-16 02:25:29 +00:00
Peter Wemm
79eb7b284f Merge rev 1.293 of i386/pmap.c - skip PG_UNMANAGED in pmap_collect() 2001-11-16 02:20:40 +00:00
Peter Wemm
704be0159c Converge with i386/pmap.c - dont refer to curproc, use curthread. 2001-11-16 02:06:06 +00:00
Peter Wemm
024c3fd9d5 As part of a general cleanup and reconvergence of related pmap code,
start tidying up some loose ends.  The DEBUG_VA stuff has long since
passed its use-by date.  It wasn't used on ia64 but got cut/pasted there.
2001-11-16 01:56:34 +00:00
Peter Wemm
5207c02e45 Implement eficlock_set() to set hardware clock. 2001-11-12 09:29:05 +00:00
Marcel Moolenaar
c35a41320d o os_boot_rendez is responsible for clearing the IRR bit by
reading cr.ivr, as well as writing to cr.eoi.
o  use global variables to pass information to os_boot_rendez
   so that it doesn't have to jump through hoops to find it
   out. This avoids traps on the AP without it even being
   initialized. This fixes SMP configurations.
o  Move the probing of the MADT to the end of cpu_startup,
   instead of at the start of cpu_mp_probe. We need to probe
   the MADT for non-SMP configurations as well. This fixes
   uniprocessor configurations.
o  Serialize AP wake-up by waiting for the AP. We need to do
   this since we use global variables to for the AP to use.
   As a side-effect, we can use printf() more easily to see
   what's going on.
2001-11-12 07:18:16 +00:00
Marcel Moolenaar
3ea7ef6aa3 Invoke trap() for the alt. ITLB and alt. DTLB interrrupts when
the region is not 6 or 7. This changes the behaviour from
inserting a bogus region 6 mapping to a kernel panic.
2001-11-12 07:08:45 +00:00
Peter Wemm
e16c208887 Remove #if 0'ed code that was replaced by vm_ksubmap_init() and GC'ed
on other platforms.
2001-11-12 04:14:04 +00:00
Marcel Moolenaar
da995dc92b Avoid using the .align directive to skip to the next vector offset.
It doesn't help us catch overflowing vector entries at compile time.
Instead use the .org directive. The last entry in the IVT doesn't
strictly need to be limited to 256 bytes, but doing so allows the
the VHPT to be placed immediately following the IVT without wasting
any space due to alignment.
2001-11-10 07:24:09 +00:00
Doug Rabson
3fc4a53e7a * Make sure we increment pm_stats.resident_count in pmap_enter_quick
* Re-organise RID allocation so that we don't accidentally give a RID
  to two different processes. Also randomise the order to try to reduce
  collisions in VHPT and TLB. Don't allocate RIDs for regions which are
  unused.
* Allocate space for VHPT based on the size of physical memory. More
  tuning is needed here.
* Add sysctl instrumentation for VHPT - see sysctl vm.stats.vhpt
* Fix a bug in pmap_prefault() which prevented it from actually adding
  pages to the pmap.
* Remove ancient dead debugging code.
* Add DDB commands for examining translation registers and region
  registers.

The first change fixes the 'free/cache page %p was dirty' panic which I
have been seeing when the system is put under moderate load. It also
fixes the negative RSS values in ps which have been confusing me for a
while.

With this set of changes the ia64 port is reliable enough to build its
own kernels, even with a 20-way parallel build. Next stop buildworld.
2001-11-09 13:25:14 +00:00
Doug Rabson
412fcd9856 Raise SIGILL for General Exceptions - its closer to the correct meaning. 2001-11-09 13:11:17 +00:00