Commit Graph

282 Commits

Author SHA1 Message Date
peter
b3b3a6b1c9 Missing part of dillon's coredump commit. cpu_coredump() was still
passing IO_NODELOCKED to vn_rdwr(), this would cause operations on the
unlocked core vnode and softupdates nastiness if an a.out binary cored.
2001-09-08 22:18:58 +00:00
obrien
34ad4938d7 style(9) the structure definitions. 2001-09-05 01:36:46 +00:00
peter
16c92cf0c3 Zap #if 0'ed map init code that got moved to the MI area.
Convert the powerpc tree to use the common code.
2001-09-04 08:42:35 +00:00
peter
119d201aab Nuke #if 0'ed "setredzone()" stub. We never used it, and probably
never will.  I've implemented an optional redzone as part of the KSE
upage breakup.
2001-09-04 08:36:46 +00:00
jhb
8f95e37de3 Axe stale mp_fixme(). 2001-09-01 00:49:29 +00:00
peter
71ad1033ae Similar to changes on i386/alpha/etc pmap.c; converge on a similar
look/feel on pmap_new_proc() with some cosmetic style changes.
2001-08-31 06:42:45 +00:00
mike
a45063618a o Remove some GCCisms in src/powerpc/include/endian.h.
o Unify <machine/endian.h>'s across all architectures.
o Make bswapXX() functions use a different spelling of u_int16_t and
  friends to reduce namespace pollution.  The bswapXX() functions
  don't actually exist, but we'll probably import these at some
  point.  Atleast one driver (if_de) depends on bswapXX() for big
  endian cases.
o Deprecate byteorder(3) prototypes from <sys/types.h>, these are
  now prototyped indirectly in <arpa/inet.h>.
o Deprecate in_addr_t and in_port_t typedefs in <sys/types.h>, these
  are now typedef'd in <arpa/inet.h>.
o Change byteorder(3) prototypes to use standards compliant uint32_t
  (spelled __uint32_t to reduce namespace pollution).
o Document new preferred headers and standards compliance.

Discussed with:	bde
PR:		29946
Reviewed by:	bmilekic
2001-08-30 00:04:19 +00:00
peter
5fa2d1a53c vm_page_zero_idle() is no longer MD. 2001-08-25 04:54:25 +00:00
peter
4694b279a2 Make COMPAT_43 optional again. XXX we need COMPAT_FBSD3 etc for this
stuff.
2001-08-21 02:32:59 +00:00
obrien
7797d96f52 Minor style(9)'ing 2001-08-16 10:13:34 +00:00
obrien
358f773cec style(9) and make consistent across platforms 2001-08-16 09:29:35 +00:00
ache
2675b7e4e4 OFF_T -> OFF (more standard style) 2001-08-15 19:50:59 +00:00
jhb
e9e129df6a The 'astpending' variable is already declared in trap.c (and unused in
FreeBSD besides).
2001-08-15 19:39:54 +00:00
jhb
a0d55b836f FreeBSD doesn't use a want_resched variable. Instead, the PS_NEEDRESCHED
p_sflag is managed in a MI fashion.
2001-08-15 19:39:09 +00:00
ache
77b2a90ced Add OFF_T_MAX/OFF_T_MIN 2001-08-15 19:25:08 +00:00
obrien
09d3a96a2f Style changes to commonize the various platforms. 2001-08-15 04:02:41 +00:00
jhb
4a89454dcd - 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
peter
bb5c43c4b8 Zap 'ptrace(PT_READ_U, ...)' and 'ptrace(PT_WRITE_U, ...)' since they
are a really nasty interface that should have been killed long ago
when 'ptrace(PT_[SG]ETREGS' etc came along.  The entity that they
operate on (struct user) will not be around much longer since it
is part-per-process and part-per-thread in a post-KSE world.

gdb does not actually use this except for the obscure 'info udot'
command which does a hexdump of as much of the child's 'struct user'
as it can get.  It carries its own #defines so it doesn't break
compiles.
2001-08-08 05:25:15 +00:00
jhb
77e6dbf699 Axe unused and invalid astpending globaldata member. 2001-08-04 20:47:54 +00:00
jhb
f7ff4f9c87 Axe unused and invalid GD_ASTPENDING symbol. 2001-08-04 20:46:46 +00:00
jake
21b80f4133 Use a machine dependent type, Elf_Hashelt, for the elements of the elf
dynamic symbol table buckets and chains.  The sparc64 toolchain uses 32
bit .hash entries, unlike other 64 bits architectures (alpha), which use
64 bit entries.

Discussed with: dfr, jdp
2001-07-31 03:46:39 +00:00
peter
036aced92f Make PMAP_SHPGPERPROC tunable. One shouldn't need to recompile a kernel
for this, since it is easy to run into with large systems with lots of
shared mmap space.

Obtained from:	yahoo
2001-07-27 01:08:59 +00:00
bmilekic
0caeab3ccd - Do not handle the per-CPU containers in mbuf code as though the cpuids
were indices in a dense array. The cpuids are a sparse set and treat
  them as such, setting up containers only for CPUs activated during
  mb_init().

- Fix netstat(1) and systat(1) to treat the per-CPU stats area as a sparse
  map, in accordance with the above.

This allows us to properly boot with certain CPUs disactivated. However, if
we later decide to re-activate said CPUs, we will barf until we decide to
implement CPU spinon/spinoff callback hooks to allow for said CPUs' per-CPU
containers to get configured on their activation.

Reported by: mjacob
Partially (sys/ diffs) Submitted by: mjacob
2001-07-26 18:47:46 +00:00
dillon
1cf218e40f Move vm_page_zero_idle() from machine-dependant sections to a
machine-independant source file, vm/vm_zeroidle.c.  It was exactly the
same for all platforms and updating them all was getting annoying.
2001-07-05 01:32:42 +00:00
dillon
93369f554a Reorg vm_page.c into vm_page.c, vm_pageq.c, and vm_contig.c (for contigmalloc).
Also removed some spl's and added some VM mutexes, but they are not actually
used yet, so this commit does not really make any operational changes
to the system.

vm_page.c relates to vm_page_t manipulation, including high level deactivation,
activation, etc...  vm_pageq.c relates to finding free pages and aquiring
exclusive access to a page queue (exclusivity part not yet implemented).
And the world still builds... :-)
2001-07-04 23:27:09 +00:00
dillon
e028603b7e 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
jhb
f43dc7e223 Allow Giant to be recursed when a process terminates. 2001-07-03 05:09:48 +00:00
imp
8555c6bb29 Don't need the .keep_me files. Obrien and I committed past each other.
Add 0-9 to the list of possible kernel names at matsushita-san's
suggestion.

Submitted by: Makoto MATSUSHITA-san <matusita@jp.FreeBSD.org>
2001-07-01 23:35:44 +00:00
benno
d5219f43a7 Don't include machine/autoconf.h for now. It's not used and is breaking the
build.
2001-07-01 02:45:15 +00:00
benno
36e4d57292 Register definitions for the OpenPIC used in various models of
iMac/PowerMac/iBook/PowerBook.

Obtained from:	NetBSD
2001-07-01 02:43:38 +00:00
benno
47eaf0390a Add TRAPF_* macros required by MI-ification of ast() and userret().
Submitted by:	Mark Peek <mark@whistle.com>
2001-07-01 02:38:38 +00:00
obrien
401c637a19 Ensure sys/${MACHINE}/compile/FOO exists
Reviewed by: arch, imp, peter, and the USENIX terminal room secret kernel cabal
2001-06-30 15:16:29 +00:00
imp
79f0cebcfb Really do proper keepme files in the compile directories. Use
.cvsignore file for [A-Za-z]* to keep these directories around rather
than waste a file on .keepme.  This should also make people's built
trees place nice with CVS.

Idea for .cvsignore: peter (although I suggested the regexp)
Pointed out by: Makoto MATSUSHITA-san <matusita@jp.FreeBSD.org>
Llama's costuming by: Fernamdo Llamas
2001-06-30 14:38:32 +00:00
obrien
9758e66106 Ensure sys/${MACHINE}/compile/FOO exists
Reviewed by: arch, imp, peter and
  the USENIX terminal room secret kernel cabal
2001-06-30 07:12:34 +00:00
jhb
cbc88996c6 Move ast() and userret() to sys/kern/subr_trap.c now that they are MI. 2001-06-29 19:51:37 +00:00
jhb
d82893e676 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
benno
c88bce56d6 Put back the two semicolons I accidentally lost while reformatting this to
bring it closer to style(9).

Spotted by:	Mark Peek <mark@whistle.com>
2001-06-28 09:56:59 +00:00
benno
a9c335b97c Code for dealing with external interrupts.
Obtained from:	NetBSD
2001-06-27 12:33:51 +00:00
benno
87e9f9315f Fix comment breakage. 2001-06-27 12:20:48 +00:00
benno
a304a71cd2 Fix the atomic_*_32 operations. These were written before I had the ability
to test them properly and before I had a working knowledge of GCC asm
constraints.
2001-06-27 12:17:23 +00:00
benno
cbd5efc8f5 Don't initialise ret in atomic_cmpset_32.
Add more synchronisation.
2001-06-26 13:54:17 +00:00
benno
b55c34215e Fix asm constraints for atomic_cmpset_32. This fix may also be needed
elsewhere.
2001-06-24 06:36:28 +00:00
benno
e3a9691522 More verbose version of identifycpu() which also contains many more CPU
versions/revisions.

Modified from the original patch to mark G3 and G4 processors as such.

Submitted by:	Jeff Schottmiller <jeff@neoscale.com>
2001-06-19 13:27:33 +00:00
benno
b8d88b43ff The final commit for the first phase of PowerPC support.
This adds the config stuff needed to build kernels.

Reviewed by:	obrien
2001-06-17 09:39:44 +00:00
benno
f371c393d1 This commit (along with one pending in sys/dev/ofw and one in sys/conf) give
us our first minimal glimpse of PowerPC support.

With this code we can get to the "mountroot>" prompt on my Apple iMac.  We
can't get any further due to lack of clock and interrupt handling, among other
things.  This does however mean that pmap and VM are initialising.

We're fairly dependant on OpenFirmware at this point, but I hope to add
support for other classes of firmware at a later stage.

Reviewed by:	obrien, dfr
2001-06-16 07:14:07 +00:00
obrien
1eb2fa3348 Add CVS id. 2001-06-15 22:54:33 +00:00
benno
dced41b010 Bring in NetBSD code used in the PowerPC port.
Reviewed by:	obrien, dfr
Obtained from:	NetBSD
2001-06-10 02:39:37 +00:00
obrien
b87b49d4db fix RCS ID style nit 2001-06-09 16:54:11 +00:00
obrien
5645a0aeb1 ID style nit. 2001-06-09 05:24:14 +00:00
obrien
35e12ff56e Style fix FreeBSD ID, and change continuation style slightly. 2001-06-09 05:01:24 +00:00
phk
b2f9beade9 Properly wrap mtx_intr_enable() macro in "do $bla while (0)" 2001-06-02 08:17:42 +00:00
jhb
9a95925dcf GC #if 0'd calls to releasing and acquiring the old style giant kernel
lock.
2001-05-29 23:35:48 +00:00
ru
35437d86aa - FDESC, FIFO, NULL, PORTAL, PROC, UMAP and UNION file
systems were repo-copied from sys/miscfs to sys/fs.

- Renamed the following file systems and their modules:
  fdesc -> fdescfs, portal -> portalfs, union -> unionfs.

- Renamed corresponding kernel options:
  FDESC -> FDESCFS, PORTAL -> PORTALFS, UNION -> UNIONFS.

- Install header files for the above file systems.

- Removed bogus -I${.CURDIR}/../../sys CFLAGS from userland
  Makefiles.
2001-05-23 09:42:29 +00:00
gallatin
1c57c3b027 catch these files up to their i386 neighbors to make alpha boot
prior to the vm_mtx
2001-05-21 16:04:24 +00:00
obrien
b8425680b5 Make _BSD_TIME_T_ (time_t) an int' rather than long'. This will help
flag errors where programmers assume time_t is a long, which it is not on
64-bit platforms.

Submitted by:	bde
2001-05-18 01:43:25 +00:00
obrien
f536c9bfce Style changes -- revert ordering to mostly two revs ago.
Embellish some comments, fix tab'ing.

Requested by:	bde
2001-05-18 01:40:40 +00:00
obrien
89ba5881e5 Consistently define the rune types.
Follow NetBSD's lead and add a _BSD_MBSTATE_T_ type.
2001-05-16 22:32:44 +00:00
obrien
9e804492ab Move the int typedefs to the top so they can be used in defining other types.
Ensure every platform has __offsetof.
Make multiple inclusion detection consistent with other
  <platform>/include/*.h files.
2001-05-16 22:21:43 +00:00
jhb
c87fc95350 Lock the procfs functions for doing a single step and reading/writing
registers better.  Hold sched_lock not only for checking the flag but
also while performing the actual operation to ensure the process doesn't
get swapped out by another CPU while we the operation is being performed.
2001-05-16 00:47:27 +00:00
jhb
f1028cebab Trim lots of stuff that is now in MI code along with MD alpha code. 2001-05-10 17:58:35 +00:00
markm
bcca5847d5 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
jhb
8bfdafc934 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
jhb
8ffc16e891 Initialize p_md.md_kernnest to 1 for newly fork'd processes since they
start off in the kernel.
2001-04-26 23:52:40 +00:00
jhb
7f17e1a5d9 Add a new field 'md_kernnest' to the alpha machine dependent process
structure.  This field keeps track of how many levels deep we are nested
into the kernel.  The nesting level is bumped at the start of a trap,
interrupt, syscall, or exception and is decremented on return.  This is
used to detect the case when the kernel is returning back to a kernel
context in exception_return().  If we are returning to the kernel we need
to update the globaldata pointer register saved in the stack frame in case
we have switched CPU's between taking the initial interrupt that saved the
frame and returning.  If we don't do this fixup it is possible for a CPU to
use the wrong per-cpu data.  On UP systems this is not a problem, so the
code is conditional on SMP.

A count was used instead of simply checking the process status register in
the frame during exception_return() since there are critical sections at
the very start and end of a trap, exception, or interrupt from userland in
which we could trash the t7 register being used in userland.  The counter
is incremented after adn before these critical sections respectively so
that we will not overwrite the saved t7 register if we are interrupted
during one of these critical sections.
2001-04-24 21:06:53 +00:00
mjacob
4222e09635 Fix includes so it compiles again. 2001-04-23 18:08:54 +00:00
jhb
a222601bea Convert the protection of hte i8254 from critical_enter/exit like it is
on the x86.
2001-04-18 21:47:48 +00:00
jhb
82848b046f Blow away the panic mutex in favor of using a single atomic_cmpset() on a
panic_cpu shared variable.  I used a simple atomic operation here instead
of a spin lock as it seemed to be excessive overhead.  Also, this can avoid
recursive panics if, for example, witness is broken.
2001-04-17 04:18:08 +00:00
jhb
0c490fd02e Rework the witness code to work with sx locks as well as mutexes.
- Introduce lock classes and lock objects.  Each lock class specifies a
  name and set of flags (or properties) shared by all locks of a given
  type.  Currently there are three lock classes: spin mutexes, sleep
  mutexes, and sx locks.  A lock object specifies properties of an
  additional lock along with a lock name and all of the extra stuff needed
  to make witness work with a given lock.  This abstract lock stuff is
  defined in sys/lock.h.  The lockmgr constants, types, and prototypes have
  been moved to sys/lockmgr.h.  For temporary backwards compatability,
  sys/lock.h includes sys/lockmgr.h.
- Replace proc->p_spinlocks with a per-CPU list, PCPU(spinlocks), of spin
  locks held.  By making this per-cpu, we do not have to jump through
  magic hoops to deal with sched_lock changing ownership during context
  switches.
- Replace proc->p_heldmtx, formerly a list of held sleep mutexes, with
  proc->p_sleeplocks, which is a list of held sleep locks including sleep
  mutexes and sx locks.
- Add helper macros for logging lock events via the KTR_LOCK KTR logging
  level so that the log messages are consistent.
- Add some new flags that can be passed to mtx_init():
  - MTX_NOWITNESS - specifies that this lock should be ignored by witness.
    This is used for the mutex that blocks a sx lock for example.
  - MTX_QUIET - this is not new, but you can pass this to mtx_init() now
    and no events will be logged for this lock, so that one doesn't have
    to change all the individual mtx_lock/unlock() operations.
- All lock objects maintain an initialized flag.  Use this flag to export
  a mtx_initialized() macro that can be safely called from drivers.  Also,
  we on longer walk the all_mtx list if MUTEX_DEBUG is defined as witness
  performs the corresponding checks using the initialized flag.
- The lock order reversal messages have been improved to output slightly
  more accurate file and line numbers.
2001-03-28 09:03:24 +00:00
jhb
4572ff9c78 - Switch from using save/disable/restore_intr to using critical_enter/exit
and change the u_int mtx_saveintr member of struct mtx to a critical_t
  mtx_savecrit.
- On the alpha we no longer need a custom _get_spin_lock() macro to avoid
  an extra PAL call, so remove it.
- Partially fix using mutexes with WITNESS in modules.  Change all the
  _mtx_{un,}lock_{spin,}_flags() macros to accept explicit file and line
  parameters and rename them to use a prefix of two underscores.  Inside
  of kern_mutex.c, generate wrapper functions for
  _mtx_{un,}lock_{spin,}_flags() (only using a prefix of one underscore)
  that are called from modules.  The macros mtx_{un,}lock_{spin,}_flags()
  are mapped to the __mtx_* macros inside of the kernel to inline the
  usual case of mutex operations and map to the internal _mtx_* functions
  in the module case so that modules will use WITNESS and KTR logging if
  the kernel is compiled with support for it.
2001-03-28 02:40:47 +00:00
jhb
8106ecf771 - Include <machine/prom.h> to get the prototype for prom_halt().
- If there is no gdb device, just return without trying to return any
  value since gdb_handle_exception() returns void.
- When calling prom_halt(), pass in a value telling it to actually halt
  and not to randomly choose whether or not to halt or reboot depending on
  whatever value happened to be in a0 when the call was made.
2001-03-28 01:54:06 +00:00
ume
d26371de82 Unbreak build on alpha.
- Move in_port_t to sys/types.h.
  - Nuke in_addr_t from each endian.h.

Reported by:	jhb
2001-03-24 15:17:27 +00:00
peter
670e711dd1 Use a generic implementation of the Fowler/Noll/Vo hash (FNV hash).
Make the name cache hash as well as the nfsnode hash use it.

As a special tweak, create an unsigned version of register_t.  This allows
us to use a special tweak for the 64 bit versions that significantly
speeds up the i386 version (ie: int64 XOR int64 is slower than int64
XOR int32).

The code layout is a little strange for the string function, but I was
able to get between 5 to 10% improvement over the original version I
started with. The layout affects gcc code generation choices and this way
was fastest on x86 and alpha.

Note that 'CPUTYPE=p3' etc makes a fair difference to this.  It is
around 45% faster with -march=pentiumpro on a p6 cpu.
2001-03-17 09:31:06 +00:00
gallatin
1e1aef3713 remove bogus check -- for kernel threads we fork off of proc0, not curproc
This was causing panics when modules which create kthreads were loaded
after boot.

pointed out by: jake, jhb
2001-03-15 02:32:26 +00:00
jhb
f108bc4208 Fix mtx_legal2block. The only time that it is bad to block on a mutex is
if we hold a spin mutex, since we can trivially get into deadlocks if we
start switching out of processes that hold spinlocks.  Checking to see if
interrupts were disabled was a sort of cheap way of doing this since most
of the time interrupts were only disabled when holding a spin lock.  At
least on the i386.  To fix this properly, use a per-process counter
p_spinlocks that counts the number of spin locks currently held, and
instead of checking to see if interrupts are disabled in the witness code,
check to see if we hold any spin locks.  Since child processes always
start up with the sched lock magically held in fork_exit(), we initialize
p_spinlocks to 1 for child processes.  Note that proc0 doesn't go through
fork_exit(), so it starts with no spin locks held.

Consulting from:	cp
2001-03-09 07:24:17 +00:00
jhb
83d74ad162 Use the proc lock to protect p_pptr when waking up our parent in cpu_exit()
and remove the mpfixme() message that is now fixed.
2001-03-07 03:20:15 +00:00
jhb
5eea0dc69d Rename switch_trampoline() to fork_trampoline() on the alpha and ia64.
Suggested by:	dfr
2001-02-22 16:56:53 +00:00
jhb
41a6853d24 GC unused and now obsolete assertion macros. 2001-02-22 15:45:49 +00:00
jhb
27efeb0d30 - Don't call clear_resched() in userret(), instead, clear the resched flag
in mi_switch() just before calling cpu_switch() so that the first switch
  after a resched request will satisfy the request.
- While I'm at it, move a few things into mi_switch() and out of
  cpu_switch(), specifically set the p_oncpu and p_lastcpu members of
  proc in mi_switch(), and handle the sched_lock state change across a
  context switch in mi_switch().
- Since cpu_switch() no longer handles the sched_lock state change, we
  have to setup an initial state for sched_lock in fork_exit() before we
  release it.
2001-02-20 05:26:15 +00:00
ume
e4a288b688 Correct disordering which is corresponding to bde's fix to
i386/include/ansi.h.
2001-02-17 14:51:11 +00:00
ume
bf66c2eda8 Correct 2nd argument of getnameinfo(3) to socklen_t.
Reviewed by:	itojun
2001-02-15 10:35:55 +00:00
markm
4e9c36b300 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
jhb
a9c84e00da - 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
jhb
5f9a24a51c Add a macro mtx_intr_enable() to alter a spin lock such that interrupts
will be enabled when it is released.
2001-02-10 02:15:18 +00:00
bmilekic
f364d4ac36 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
dfr
ba26212fc9 * Move exception_return to exception.s which is a more logical home for it.
* Optimise the return path for syscalls so that they only restore a minimal
  set of registers instead of performing a full exception_return.

A new flag in the trapframe indicates that the frame only holds partial
state. When it is necessary to perform a full state restore (e.g. after an
execve or signal), the flag is cleared to force a full restore.
2001-01-31 11:17:00 +00:00
jhb
17984f33e4 Update some comments, s0 in the pcb of a child returning from fork1() is
now passed in as a0 to fork_exit() and and s2 is passed in as a1.
2001-01-26 23:32:38 +00:00
jhb
af00dc8eef - Change fork_exit() to take a pointer to a trapframe as its 3rd argument
instead of a trapframe directly.  (Requested by bde.)
- Convert the alpha switch_trampoline to call fork_exit() and use the MI
  fork_return() instead of child_return().
- Axe child_return().
2001-01-24 21:59:25 +00:00
jasone
8d2ec1ebc4 Convert all simplelocks to mutexes and remove the simplelock implementations. 2001-01-24 12:35:55 +00:00
jhb
264b1fe22a - Rename the gd_cpuno member of struct globaldata to gd_cpuid.
- Add a globaldata_register() prototype in the SMP case.
2001-01-24 10:24:49 +00:00
jhb
451c942dba - Proc locking.
- P_INMEM -> PS_INMEM.
2001-01-24 10:16:23 +00:00
jhb
8c0af7d84b cpuno -> cpuid. 2001-01-24 10:04:32 +00:00
jasone
ec55088093 Move most of sys/mutex.h into kern/kern_mutex.c, thereby making the mutex
inline functions non-inlined.  Hide parts of the mutex implementation that
should not be exposed.

Make sure that WITNESS code is not executed during boot until the mutexes
are fully initialized by SI_SUB_MUTEX (the original motivation for this
commit).

Submitted by:	peter
2001-01-21 22:34:43 +00:00
jake
937122ae6d Make intr_nesting_level per-process, rather than per-cpu. Setup
interrupt threads to run with it always >= 1, so that malloc can
detect M_WAITOK from "interrupt" context.  This is also necessary
in order to context switch from sched_ithd() directly.

Reviewed By:	peter
2001-01-21 19:25:07 +00:00
jake
422162e650 Remove unused per-cpu variables inside_intr and ss_eflags. 2001-01-12 07:47:54 +00:00
jake
4f7710fc47 - Remove compatibility macros for accessing per-cpu variables.
__FreeBSD_version 500015 can be used to detect their disappearance.
- Move the symbols for SMP_prvspace and lapic from globals.s to
  locore.s.
- Remove globals.s with extreme prejudice.
2001-01-11 14:46:26 +00:00
obrien
464d16ce94 Remove seconds types we don't use that came in thru the NetBSD heiratage. 2001-01-08 06:17:11 +00:00
benno
2031489c0d PowerPC atomic operation functions.
Some of these are dependant on an inline function (powerpc_mb()) that is
yet to come.

Reviewed by:	obrien
2001-01-07 03:46:01 +00:00
benno
4814964c58 PowerPC assembler #defines.
Reviewed by:	obrien
Obtained from:	NetBSD
2001-01-07 03:43:21 +00:00
jake
d20b7bdad1 Implement accessors for per-cpu variables which don't depend on the
symbols in globals.s.

	PCPU_GET(name) returns the value of the per-cpu variable
	PCPU_PTR(name) returns a pointer to the per-cpu variable
	PCPU_SET(name, val) sets the value of the per-cpu variable

In general these are not yet used, compatibility macros remain.

Unifdef SMP struct globaldata, this makes variables such as cpuid
available for UP as well.

Rebuilding modules is probably a good idea, but I believe old
modules will still work, as most of the old infrastructure
remains.
2001-01-06 19:55:42 +00:00
obrien
5d83ebcf7c PowerPC platform-specific definitions (modeled on sys/i386/include/setjmp.h) 2001-01-02 00:34:24 +00:00