Commit Graph

2730 Commits

Author SHA1 Message Date
Doug Rabson
b5da4ce935 Add code to detect Transmeta Crusoe cpus. 2001-06-25 15:11:33 +00:00
John Baldwin
06c836bbca - Grab the proc lock around CURSIG and postsig(). Don't release the proc
lock until after grabbing the sched_lock to avoid CURSIG racing with
  psignal.
- Don't grab Giant for addupc_task() as it isn't needed.

Reported by:	tegge (signal race), bde (addupc_task a while back)
2001-06-22 23:05:11 +00:00
Peter Wemm
1a6d55cecd Make the hw.physmem and hw.usermem variables unsigned so that they dont
come up as negative on machines with >2GB ram.
2001-06-22 22:07:01 +00:00
John Baldwin
ce1a1f42fb Initialize mutexes needed early on all in the same place so that the
startup routine more closely matches that of alpha and ia64.  At some
point the common mutexes shared across all platforms probably should move
into sys/kern_mutex.c.
2001-06-18 19:19:38 +00:00
John Baldwin
0865563a93 - Add support for decoding syscall names. (Brought over from the new alpha
trace code that was brought over from NetBSD.)
- Check for "syscall_with_err_pushed" as the label prior to a syscall trap
  frame rather than "Xlcall_syscall" and "Xint0x80_syscall".  We don't
  have a valid trapframe during the short range of code that those two
  symbols now cover.
- Simplify db_next_frame() to avoid duplicating the code for the different
  trap frame types.
- Don't try to trace a swapped-out process.  (Brought over from NetBSD via
  the new alpha trace code.)
2001-06-18 19:17:30 +00:00
John Baldwin
3128cdd847 Include sys/pcpu.h to get the prototype for globaldata_register() to quiet
a warning.
2001-06-18 19:06:14 +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
Alexander Langer
90f76f2df0 Fix "alignemnt" typo. 2001-06-16 15:28:28 +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
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
David E. O'Brien
f9b58b41a3 Fix style of defines. 2001-06-09 05:21:17 +00:00
John Baldwin
262c9f8a3b Don't hold sched_lock across addupc_task().
Reported by:	David Taylor <davidt@yadt.co.uk>
Submitted by:	bde
2001-06-06 00:57:24 +00:00
Poul-Henning Kamp
0d31cbfab7 Properly wrap mtx_intr_enable() macro in "do $bla while (0)" 2001-06-02 08:17:42 +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
John Baldwin
5eb6e27905 Quiet warnings by adding a prototype for set_user_ldt_rv() and making it
conditional on #ifdef SMP.
2001-05-30 21:57:52 +00:00
John Baldwin
1acf256d96 We can't grab the sched_lock in set_user_ldt() because when it is called
from cpu_switch(), curproc has been changed, but the sched_lock owner will
not be updated until we return to mi_switch(), thus we deadlock against
ourselves.  As a workaround, push the acquire and release of sched_lock out
to the callers of set_user_ldt().  Note that we can't use a mtx_assert() in
set_user_ldt for the same reason.

Sleuting by:	tmm
Tested by:	tmm, dougb
2001-05-30 14:35:22 +00:00
Matt Jacob
ecf33dd4c4 move wx to be part of miibus requiring chipsets 2001-05-30 03:20:52 +00:00
Poul-Henning Kamp
888a8e3567 Remove MFS options from all example kernel configs. 2001-05-29 18:49:06 +00:00
Jordan K. Hubbard
caff01c276 Remove pcm hints here now that it's gone from GENERIC.
Reminded-by:	bde
2001-05-26 08:04:34 +00:00
Jordan K. Hubbard
62d1937cec Take pcm (audio) back out of GENERIC; there appears to be some
concensus, most notably among the maintainers, that it's better
loaded as a module.

Finally-pushed-over-the-edge-by-the-anguished-cries-of:	rwatson
2001-05-25 17:55:39 +00:00
John Baldwin
0dfefe6829 Don't acquire Giant just to call trap_fatal(), we are about to panic
anyway so we'd rather see the printf's then block if the system is
hosed.
2001-05-23 22:58:09 +00:00
Alfred Perlstein
1f50e112b6 pmap_mapdev needs the vm_mtx, aquire it if not already locked 2001-05-23 22:17:28 +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
John Baldwin
c4f96c5f83 Remove a few more spl's I missed earlier.
Reported by:	Michael Harnois <mdharnois@home.com>
Pointy hat:	me
2001-05-22 00:09:26 +00:00
John Baldwin
9dceb26b23 Sort includes. 2001-05-21 18:52:02 +00:00
John Baldwin
d8aad40c88 Axe unneeded spl()'s. 2001-05-21 18:30:50 +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
Bruce Evans
c2b095ab72 Use a critical region to protect saving of the npx state in savectx().
Not doing this was fairly harmless because savectx() is only called
for panic dumps and the bug could at worse reset the state.

savectx() is still missing saving of (volatile) debug registers, and
still isn't called for core dumps.
2001-05-20 16:51:08 +00:00
Alfred Perlstein
2395531439 Introduce a global lock for the vm subsystem (vm_mtx).
vm_mtx does not recurse and is required for most low level
vm operations.

faults can not be taken without holding Giant.

Memory subsystems can now call the base page allocators safely.

Almost all atomic ops were removed as they are covered under the
vm mutex.

Alpha and ia64 now need to catch up to i386's trap handlers.

FFS and NFS have been tested, other filesystems will need minor
changes (grabbing the vm lock when twiddling page properties).

Reviewed (partially) by: jake, jhb
2001-05-19 01:28:09 +00:00
John Baldwin
7a08bae6ec - Move the setting of bootverbose to a MI SI_SUB_TUNABLES SYSINIT.
- Attach a writable sysctl to bootverbose (debug.bootverbose) so it can be
  toggled after boot.
- Move the printf of the version string to a SI_SUB_COPYRIGHT SYSINIT just
  afer the display of the copyright message instead of doing it by hand in
  three MD places.
2001-05-17 22:28:46 +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
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
Poul-Henning Kamp
ab9f3b292e Convert DEVFS from an "opt-in" to an "opt-out" option.
If for some reason DEVFS is undesired, the "NODEVFS" option is
needed now.

Pending any significant issues, DEVFS will be made mandatory in
-current on july 1st so that we can start reaping the full
benefits of having it.
2001-05-13 20:52:40 +00:00
Bruce Evans
a4b8c657a3 Use a critical region to protect pushing of the parent's npx state to the
pcb for fork().  It was possible for the state to be saved twice when an
interrupt handler saved it concurrently.  This corrupted (reset) the state
because fnsave has the (in)convenient side effect of doing an implicit
fninit.  Mundane null pointer bugs were not possible, because we save to
an "arbitrary" process's pcb and not to the "right" place (npxproc).

Push the parent's %gs to the pcb for fork().  Changes to %gs before
fork() were not preserved in the child unless an accidental context
switch did the pushing.  Updated the list of pcb contents which is
supposed to inhibit bugs like this.  pcb_dr*, pcb_gs and pcb_ext were
missing.  Copying is correct for pcb_dr*, and pcb_ext is already
handled specially (although XXX'ly).

Reducing the savectx() call to an npxsave() call in rev.1.80 was a
mistake.  The above bugs are duplicated in many places, including in
savectx() itself.

The arbitraryness of the parent process pointer for the fork()
subroutines, the pcb pointer for savectx(), and the save87 pointer
for npxsave(), is illusory.  These functions don't work "right" unless
the pointers are precisely curproc, curpcb, and the address of npxproc's
save87 area, respectively, although the special context in which they
are called allows savectx(&dumppcb) to sort of work and npxsave(&dummy)
to work.  cpu_fork() just doesn't work unless the parent process
pointer is curproc, or the caller has pushed %gs to the pcb, or %gs
happens to already be in the pcb.
2001-05-13 07:44:14 +00:00
Daniel Eischen
10c90bba3b Revert part of last commit. Instead of using %fs for KSD/TSD, we'll
follow Linux' convention and use %gs.  This adds back the setting of
%fs to a sane value in sendsig().  The value of %gs remains preserved
to whatever it was in user context.
2001-05-12 22:54:53 +00:00
John Baldwin
1efb92b7ca Simplify the vm fault trap handling code a bit by using if-else instead of
duplicating code in the then case and then using a goto to jump around
the else case.
2001-05-11 23:50:08 +00:00
Mike Smith
85fab96387 Un-swap irq/link byte values so that printf works. 2001-05-11 04:52:29 +00:00
John Baldwin
ba228f6d96 - Split out the support for per-CPU data from the SMP code. UP kernels
have per-CPU data and gdb on the i386 at least needs access to it.
- Clean up includes in kern_idle.c and subr_smp.c.

Reviewed by:	jake
2001-05-10 17:45:49 +00:00
John Baldwin
df4d012b9a - Use sched_lock and critical regions to ensure that LDT updates are thread
safe from preemption and concurrent access to the LDT.
- Move the prototype for i386_extend_pcb() to <machine/pcb_ext.h>.

Reviewed by:	silence on -hackers
2001-05-10 17:03:03 +00:00
Daniel Eischen
46022f276b When setting up the frame to invoke a signal handler, preserve the
%fs and %gs registers instead of setting them to known sane values.
%fs is going to be used for thread/KSE specific data by the new
threads library; we'll want it to be valid inside of signal handlers.

According to bde, Linux preserves the state of %fs and %gs when setting
up signal handlers, so there is precedent for doing this.

The same changes should be made in the Linux emulator, but when made,
they seem to break (at least one version of) the IBM JDK for Linux
(reported by drew).

Approved by:	bde
2001-05-06 02:13:12 +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
Greg Lehey
60fb0ce365 Revert consequences of changes to mount.h, part 2.
Requested by:	bde
2001-04-29 02:45:39 +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
Jake Burkholder
7a72decc2e Remove a leading underscore that prevented I386_CPU kernels from
compiling.

Submitted by:	Alexander N. Kabaev <ak03@gte.com>
PR:		kern/26858
2001-04-26 13:57:03 +00:00