Commit Graph

1483 Commits

Author SHA1 Message Date
Brooks Davis
53dab5fe7b gif(4) and stf(4) modernization:
- Remove gif dependencies from stf.
 - Make gif and stf into modules
 - Make gif cloneable.

PR:		kern/27983
Reviewed by:	ru, ume
Obtained from:	NetBSD
MFC after:	1 week
2001-07-02 21:02:09 +00:00
Warner Losh
1f94b9005c 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
David E. O'Brien
5e6ded4212 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
Warner Losh
e1d0d8a941 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
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
John Baldwin
7aa7260e4a Move ast() and userret() to sys/kern/subr_trap.c now that they are MI. 2001-06-29 19:51:37 +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
John Baldwin
f052203eed Grab Giant around fault handling at the top level for now. 2001-06-29 04:18:59 +00:00
John Baldwin
f565449541 Allow the clock lock to recurse. 2001-06-25 23:56:56 +00:00
John Baldwin
eaa942ebbd - Grab the vm lock around all of pmap_emulate_reference() as it manipulates
vm_page_t's.
- Add a KTR_TRAP tracepoint to trap() on the alpha that displays the
  contents of a0, a1, and a2 to make debugging of nested traps that
  panic before displaying any useful output easier.
2001-06-25 23:52:25 +00:00
Matt Jacob
d1d080f810 fix oopslet for PROC_UNLOCK_NOSWITCH 2001-06-24 18:23:17 +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
John Baldwin
49f886f5d3 Be conservative and always perform an mb after an atomic_cmpset operation. 2001-06-22 21:13:20 +00:00
John Baldwin
f4a395d6e4 Doh, missed a printf -> db_printf in the previous commit. 2001-06-22 15:37:48 +00:00
Peter Wemm
c1e152312d Clean up some junk. The bogus trapframe on the stack was removed from the
MI code in August 2000 elsewhere.
2001-06-16 22:07:32 +00:00
John Baldwin
7474a22698 I'm a dunce. Clean up some warnings by axeing some unused variables from
the previous commit.
2001-06-15 21:09:44 +00:00
John Baldwin
931c1e20e4 Updates and tweaks to the new trace functionality:
- Use db_printf() instead of printf().
- Clean up decode_syscall() to use regular if-then-else rather than goto's.
- Use the same method of parsing PID's for per-process traces as the x86
  code does: that is, if the address passed in is not a valid kernel
  address, treat it is a decimal pid.
- If the pid of the current process is specified, fall back to using the
  "default" parameters for the trace as curproc's pcb is not valid at this
  point.

MFC after:	1 week
2001-06-15 20:27:44 +00:00
Peter Wemm
e634a8c804 oops. prepare_usermode() died in August 2000 in the MI and x86 code.
Issue raised by:	scottl
2001-06-15 09:59:27 +00:00
Matt Jacob
773fa867f2 If we're not going to use am7990_shutdown, comment it all out.
MFC after:	2 weeks
2001-06-14 19:36:37 +00:00
Matt Jacob
1aaf1de145 Fix Assembler buglet: Warning: .end directive names different symbol than .ent
MFC after:	2 weeks
2001-06-14 19:33:16 +00:00
Peter Wemm
ee24290963 As per comments in sys/linker_set.h:
BANG! BANG! BANG! BANG! BANG! BANG! CLICK! CLICK! CLICK! CLICK! CLICK!
<reload>
BANG! BANG! BANG! BANG! BANG! BANG! CLICK! CLICK! CLICK! CLICK! CLICK!
2001-06-14 01:28:56 +00:00
Andrew Gallatin
a7f595f8a2 initialize mp_ncpus in cpu_mp_probe() so that if the probe fails and
cpu_mp_start() is never called, mp_ncpus will have a non-zero value.
This prevents systat from dying with an arithmatic exception caused
by a divide-by-zero error on UP alphas running a GENERIC kernel.
2001-06-13 20:40:24 +00:00
Peter Wemm
f41325db5f With this commit, I hereby pronounce gensetdefs past its use-by date.
Replace the a.out emulation of 'struct linker_set' with something
a little more flexible.  <sys/linker_set.h> now provides macros for
accessing elements and completely hides the implementation.

The linker_set.h macros have been on the back burner in various
forms since 1998 and has ideas and code from Mike Smith (SET_FOREACH()),
John Polstra (ELF clue) and myself (cleaned up API and the conversion
of the rest of the kernel to use it).

The macros declare a strongly typed set.  They return elements with the
type that you declare the set with, rather than a generic void *.

For ELF, we use the magic ld symbols (__start_<setname> and
__stop_<setname>).  Thanks to Richard Henderson <rth@redhat.com> for the
trick about how to force ld to provide them for kld's.

For a.out, we use the old linker_set struct.

NOTE: the item lists are no longer null terminated.  This is why
the code impact is high in certain areas.

The runtime linker has a new method to find the linker set
boundaries depending on which backend format is in use.

linker sets are still module/kld unfriendly and should never be used
for anything that may be modular one day.

Reviewed by:	eivind
2001-06-13 10:58:39 +00:00
Andrew Gallatin
4d38dc6689 Use struct device * rather than device_t for (*pci_intr_route args), so
as to match other prototypes in the file.
2001-06-11 18:19:44 +00:00
Andrew Gallatin
abeba9a6bc Supply the intpin to the platform.pci_intr_map() function. It turns
out nearly every platform but the one I tested on requires the intpin
to swizzle out the correct intline.

tested by: Martijn Pronk <mpkisbkl@xs4all.nl> (lca_pci)
2001-06-10 19:18:51 +00:00
David E. O'Brien
f9b58b41a3 Fix style of defines. 2001-06-09 05:21:17 +00:00
Andrew Gallatin
8c8fdd1fa2 Sync up to v 1.9 of NetBSD's db_trace.c to get access to the
greatly improved traceback code from Ross Harvey.  This code
requires the use of more traceback friendly temporary labels
at kernel entry points, hence the changes to exception.s and
asm.h

Reviewed by: jhb, dfr
Obtained from: NetBSD
MFC after: 1 week
2001-06-08 13:38:02 +00:00
Andrew Gallatin
b8da8ef880 hold the vm_mtx around vm_map_lookup_entry() and vm_map_findspace() 2001-06-06 14:07:52 +00:00
Andrew Gallatin
751eb2452f Apparently, the vm_mtx must be held around vm_map_find(). I'm assuming
that it needn't be held around vm_mmap() since vm_mmap() itself aquires
it.

Sleuthing by: obrien
2001-06-06 13:46:16 +00:00
Joerg Wunsch
e774b25111 Nuke the various poorly maintained copies of ioctl_fd.h. The file is
not machine-dependant, thus it has been moved out (repo-copied) into
<sys/fdcio.h>.
2001-06-06 06:15:03 +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
Matt Jacob
d50c79387a Use correct flag in test whether this interrupt handler is fast or not.
PR:		27866
Submitted by:	Peter Jeremy <peter.jeremy@alcatel.com.au>
2001-06-04 00:52:09 +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
Andrew Gallatin
150cd07213 Resurrect platform.pci_intr_map() and essentially undo the effects of
the interface conversion to platform.pci_intr_route().  I've left the
platform.pci_intr_route() function pointer in place, as well as
alpha_pci_route_interrupt(), but no platform currently implements it.

To work around the removal of alpha_platform_assign_pciintr(cfg);
from the pci probe code, I've hooked in calls to platform.pci_intr_map()
in pcib_read_config (similar to the x86 APIC_IO ifdef in pci_cfgregread)
for every chipset that has a platform which needs it.

While here, I've removed the interupt mapping/routing code from the
AS2x00 platform because its not required (it has never been present in
-stable).

Tested on: UP1000, Miata(GL), XP1000, AS2100, AS500
2001-06-01 17:39:11 +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
Andrew Gallatin
c6c87f2a18 remove unneeded #include <vm/vm_map.h> 2001-05-31 23:31:34 +00:00
Andrew Gallatin
6dc5259a6c Backout previous revision. While it fixed many platforms, it broke
all alphas with devices behind ppb's.  I'm working on a better solution now.

Note that all alphas that use per-platform interrupt mapping are broken
again (as they have been for several months)
2001-05-31 21:47:25 +00:00
Matt Jacob
ecf33dd4c4 move wx to be part of miibus requiring chipsets 2001-05-30 03:20:52 +00:00
John Baldwin
d0605c94ed GC #if 0'd calls to releasing and acquiring the old style giant kernel
lock.
2001-05-29 23:35:48 +00:00
Poul-Henning Kamp
888a8e3567 Remove MFS options from all example kernel configs. 2001-05-29 18:49:06 +00:00
David E. O'Brien
dfbe5c12ae One needs to introduce things with a `.file' directive before trying to
do a .loc on it.  BTW, the .loc needs to be in a .text section.
gas 2.11.0 catches these oversights where previous versions did not.
2001-05-28 09:52:21 +00:00
Andrew Gallatin
d6a516cf80 finally fix intr routing on alphas such as the as500 after months of
breakage:

- call PCIB_ROUTE_INTERRUPT() regardless of how valid the intline looks.
  Some alphas leave garbage in the intline and leave the intr mapping
  to OS platform support routines that map slots/buses to intlines
- Down in the alpha pci code, first try platform.pci_intr_route() and
  if it doesn't exist or returns garbage, just read the intline out of
  config space.

tested on AS500 (garbage in intline) and UP1000 (PC-like, intline is valid)

Note that a nice little hack like the APIC_IO section of pci_cfgregread()
is not workable.  This is because the calling interface for
alpha_pci_route_interrupt() requires us to figure out the bus/slot/etc
from a device_t.  At pci_read_device() time, we don't have a device_t
for the bus/slot/func in question.
2001-05-27 22:22:03 +00:00
Andrew Gallatin
9c201d7ba1 catch up to i386: Don't acquire Giant just to print the trap and panic 2001-05-25 21:03:40 +00:00
Andrew Gallatin
9a6832a398 make this compile. 2001-05-25 20:56:28 +00:00
Matt Jacob
fe95b46491 track the One True Architecture (i386) 2001-05-25 20:33:06 +00:00
David E. O'Brien
3355915e54 JHB would prefer the KTR examples not be in here. 2001-05-25 18:49:08 +00:00
Robert Watson
b1fc0ec1a7 o Merge contents of struct pcred into struct ucred. Specifically, add the
real uid, saved uid, real gid, and saved gid to ucred, as well as the
  pcred->pc_uidinfo, which was associated with the real uid, only rename
  it to cr_ruidinfo so as not to conflict with cr_uidinfo, which
  corresponds to the effective uid.
o Remove p_cred from struct proc; add p_ucred to struct proc, replacing
  original macro that pointed.
  p->p_ucred to p->p_cred->pc_ucred.
o Universally update code so that it makes use of ucred instead of pcred,
  p->p_ucred instead of p->p_pcred, cr_ruidinfo instead of p_uidinfo,
  cr_{r,sv}{u,g}id instead of p_*, etc.
o Remove pcred0 and its initialization from init_main.c; initialize
  cr_ruidinfo there.
o Restruction many credential modification chunks to always crdup while
  we figure out locking and optimizations; generally speaking, this
  means moving to a structure like this:
        newcred = crdup(oldcred);
        ...
        p->p_ucred = newcred;
        crfree(oldcred);
  It's not race-free, but better than nothing.  There are also races
  in sys_process.c, all inter-process authorization, fork, exec, and
  exit.
o Remove sigio->sio_ruid since sigio->sio_ucred now contains the ruid;
  remove comments indicating that the old arrangement was a problem.
o Restructure exec1() a little to use newcred/oldcred arrangement, and
  use improved uid management primitives.
o Clean up exit1() so as to do less work in credential cleanup due to
  pcred removal.
o Clean up fork1() so as to do less work in credential cleanup and
  allocation.
o Clean up ktrcanset() to take into account changes, and move to using
  suser_xxx() instead of performing a direct uid==0 comparision.
o Improve commenting in various kern_prot.c credential modification
  calls to better document current behavior.  In a couple of places,
  current behavior is a little questionable and we need to check
  POSIX.1 to make sure it's "right".  More commenting work still
  remains to be done.
o Update credential management calls, such as crfree(), to take into
  account new ruidinfo reference.
o Modify or add the following uid and gid helper routines:
      change_euid()
      change_egid()
      change_ruid()
      change_rgid()
      change_svuid()
      change_svgid()
  In each case, the call now acts on a credential not a process, and as
  such no longer requires more complicated process locking/etc.  They
  now assume the caller will do any necessary allocation of an
  exclusive credential reference.  Each is commented to document its
  reference requirements.
o CANSIGIO() is simplified to require only credentials, not processes
  and pcreds.
o Remove lots of (p_pcred==NULL) checks.
o Add an XXX to authorization code in nfs_lock.c, since it's
  questionable, and needs to be considered carefully.
o Simplify posix4 authorization code to require only credentials, not
  processes and pcreds.  Note that this authorization, as well as
  CANSIGIO(), needs to be updated to use the p_cansignal() and
  p_cansched() centralized authorization routines, as they currently
  do not take into account some desirable restrictions that are handled
  by the centralized routines, as well as being inconsistent with other
  similar authorization instances.
o Update libkvm to take these changes into account.

Obtained from:	TrustedBSD Project
Reviewed by:	green, bde, jhb, freebsd-arch, freebsd-audit
2001-05-25 16:59:11 +00:00
David E. O'Brien
0ec59619a5 + Turn on SMP support by default (yes an Alpha SMP kernel works on
uniprocessor systems, aren't Alpha's neat :-))
+ Add example KTR (debugging) options.
2001-05-25 10:36:46 +00:00
Doug Rabson
a0e512b219 Make sure that all resource allocation is handled in the pcib device, not
the chipset. This is already how the multi-hose systems handle resource
allocation and it fixes a bug where dense and bwx memory allocations were
not handled properly.

Reviewed by: gallatin
2001-05-23 19:44:17 +00:00
Andrew Gallatin
42fcdcb3e9 catch up to i386:
- remove Giant for vm related traps
- don't hold Giant for MP safe syscalls

Reviewed-by: jhb
2001-05-23 16:34:07 +00:00
Ruslan Ermilov
99d300a1ec - 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
Andrew Gallatin
3bd404a4e2 grab the vm mtx around exec_new_vmspace() 2001-05-22 18:45:12 +00:00
Andrew Gallatin
08eceb4f4b Change pmap_emulate_reference() so that it only touches the vm_page
flags if it is safe to do so, otherwise it will just alter the pmap state
(eg, clear the appropriate PG_FOx bits).

This gets alpha booting in the face of the vm_mtx introduction.

Reviewed by: dfr
2001-05-21 16:09:29 +00:00
Andrew Gallatin
2ee7c91e2e 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
Andrew Gallatin
c5c4ac3fb8 fix vm_mtx related compiler warning 2001-05-20 16:41:37 +00:00
Andrew Gallatin
29e7f33db5 fix alpha-MD compile errors after the vm_mtx commit 2001-05-20 16:22:46 +00:00
David E. O'Brien
ef76752043 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
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
David E. O'Brien
0dfc89c188 Consistently define the rune types.
Follow NetBSD's lead and add a _BSD_MBSTATE_T_ type.
2001-05-16 22:32:44 +00:00
David E. O'Brien
1123bf8862 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
John Baldwin
f0ba29575d 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
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
Joerg Wunsch
2995d1100c Implement a few more floppy ioctl commands and IO options, namely:
. FD_CLRERR clears the error counter, thus re-enables kernel error
  printf()s,

. FD_GSTAT obtains the last FDC operation state, if any,

. FDOPT_NOERRLOG (temporarily) turns off kernel printf() floppy
  error logging,

. FDOPT_NOERROR makes the kernel ignore an FDC error, thus can
  enable the transfer of an erroneous sector to the user application

All options are being cleared on (last) close.

Prime consumer of the last features will be fdread(1), to be committed
shortly.

(FD_CLRERR should be wired into fdcontrol(8), but then fdcontrol(8)
needs a major rewrite anyway.)
2001-05-14 20:20:11 +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
John Baldwin
dd094a2d17 Simply 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 23:17:54 +00:00
John Baldwin
87e2d38376 Allow sendsig() to hand the proc lock off to osendsig() rather than having
sendsig() release the lock just so it can call osendsig() and have
osendsig() acquire the lock.
2001-05-11 23:17:05 +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
Matt Jacob
5532b9f61e The new order of things is that dwlpxN is now called pcibN- so hack around
*that* whilst we ponder the best way to decide how to register dwlpx interrupts
with TLSB.
2001-05-10 07:08:03 +00:00
Matt Jacob
fd5fcd7c1a add alpha_pci_route_interrupt method 2001-05-10 06:52:56 +00:00
Matt Jacob
d18bc19f87 Quick hack to reintroduce the notion that there might be alpha platforms
without an i8254 timer/counter. This really needs to be cleaned up.
2001-05-10 05:23:58 +00:00
John Baldwin
221897cddb Include sys/lock.h for witness_list_locks() and axe unneeded sys/mutex.h
include.
2001-05-09 22:08:28 +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
3908917969 Turn on preemption by default on the alpha arch. This also removes the
PREEMPTION kernel option.

Not objected to by:	-alpha
2001-05-01 00:19:24 +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
Andrew Gallatin
e5878540ed Make stathz match reality on platforms like the 4100 where hz!=1024
It might be more correct to make stathz as close as possible to 128,
but that would involve adding complexity to the clock intr path, which
I don't want to do.
2001-04-27 18:21:25 +00:00
John Baldwin
bf4c03d0e9 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
David E. O'Brien
58c9a20771 Fix SCM ID's and remove tailing blanks. 2001-04-25 20:40:57 +00:00
John Baldwin
bb61024d88 - Make the dumping of console messages from the secondary CPU's to the
kernel console be #ifdef DIAGNOSTIC.
- Don't set ktr_mask in release_aps().
2001-04-25 17:24:57 +00:00
Andrew Gallatin
7b6630700d alpha_fpstate_save is fairly expensive (critical enter/exit, possibly
saves 32 registers) to do on every context switch.  This is only required
for SMP, so only do it there.

We should also look at moving the critical enter/exit out to the callers
2001-04-25 13:57:33 +00:00
John Baldwin
9e438eb4f5 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
Matt Jacob
140509ab5d fix it so it compiles again after twerpage elsewhere 2001-04-23 18:38:01 +00:00
Matt Jacob
ac60aa4908 Fix includes so it compiles again. 2001-04-23 18:08:54 +00:00
Andrew Gallatin
62dbd2f29e Block out all interrupts, even machine checks, for critical_enter()
This is will be required to prevent lowering the ipl when a critical_enter()
is present in the interrupt path when handling a machine check.

reviewed by: jhb
2001-04-21 21:44:39 +00:00
Andrew Gallatin
29b3d1c151 GC some debugging code that's been #if 0'ed since we got the file from
NetBSD
2001-04-20 00:55:21 +00:00
John Baldwin
08b0f4f908 Convert the protection of hte i8254 from critical_enter/exit like it is
on the x86.
2001-04-18 21:47:48 +00:00
John Baldwin
e18935281b Back out the previous revision as it causes random sig 11's to userland
processes until a better fix is found.

Submitted by:	gallatin
2001-04-18 17:17:55 +00:00
John Baldwin
5d52039847 Save are floating point state in cpu_switch() if needed instead of relying
completely on lazy floating point state saving.  This is needed for the
SMP case since processes can migrate to other CPUs.

Submitted by:	dfr
2001-04-17 18:27:55 +00:00
Andrew Gallatin
73f446d078 set gd_other_cpus later, when we have a better idea what the other cpus
are.

submitted by: jhb
2001-04-17 14:59:05 +00:00
Andrew Gallatin
386eac30d9 Improved support for alpha SMP. The following commit gets dual AS2100s
and AS4100s into single user mode. This work was done jointly by jhb and
myself, and builds on dfr's earlier work.

smp_init_secondary() / smp_start_secondary()
- use the uniq val to pass the globalp (me)
- fancy footwork to take any pending machine checks (me)
- doing things the FreeBSD way and getting the per-cpu idleproc created
  correctly, and synchronizing the startup of secondaries (jhb)

mp_start()
- better recognition of available cpus (jhb)

smp_rendezvous()
- if smp hasn't started, only run the rendezvous function on the current
cpu.  Sleuthing and (prior) incorrect fix by me, correct fix by jhb

smp_handle_ipi()
- more verbose handling of console messages (jhb)
- grab sched lock around setting PS_ASTPENDING (jhb)

forward_*clock()
- commented out.  Joint decision by dfr, jhb and myself

 General synchronization improvements (more mb()s, etc) (jhb)

 Printf cleanups (joint)

 Whitespace cleanups (jhb)
2001-04-17 14:55:09 +00:00
Andrew Gallatin
3706fa1be6 Changes to support SMP:
- don't do the stack overflow sanity check on MP systems -- p->p_addr
will be malloc'ed memory (not K0SEG) and the check will fail.

- don't ignore clock interrupts on secondaries.  Alphas apparently
roundrobin clock interrupts to all cpus, so we're going to take clock
interrupts on all CPUS and not forward them.
2001-04-17 14:20:33 +00:00
Andrew Gallatin
ed4835b64d changes to smp_init_secondary_glue():
- use the unique value to save the per-cpu globalp struct like the
  comment says

- don't lower the ipl to ALPHA_PSL_IPL_HIGH: we may have a pending machine
  check to take and we're not prepared for that yet, as we haven't setup
  our interrupt entry points. (this may only happen on sable/lynx)

- indicate the fact that the working version of smp_init_secondary() doesn't
  return (this is tied up in other changes and hasn't yet been committed).
2001-04-17 14:15:12 +00:00
John Baldwin
abd9053ee4 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
John Baldwin
8c321ed95f - Add appropriate #ifndef/#define/#endif to protect against multiple
inclusions.
- Blow away all evidence of a static curpcb as curpcb is a per-CPU variable
  and this definition is now bogus.
2001-04-17 02:51:28 +00:00
John Baldwin
2bec909c3d - Fix memory barriers in atomic operations so that the barriers are always
"inside" of locked regions.  That is, an acquire atomic operation will
  always enforce a memory barrier after the atomic operation and a release
  operation will always enforce a memory barrier before the atomic
  operation.
- Explicitly use 'mb' instead of 'wmb' in release atomic operations.  The
  'wmb' memory barrier is not strong enough to guarantee coherence with
  other processors.  This is effectively a nop since alpha_wmb() actually
  performs a 'mb' and not a 'wmb', but I wanted the code to be more
  correct since at some point in the future alpha_wmb()'s implementation
  may switch to being a real 'wmb'.
2001-04-17 02:50:05 +00:00
John Baldwin
85eba1489b Add a cpu_throw() function that secondary CPU's can use for their first
context switch.
2001-04-17 02:46:13 +00:00
John Baldwin
0f98ef505a In exception_return(), test for usermode before testing the IPL to see if
we should call ast().  This allows us to branch to a separate Lkernelret
label so we can fixup the saved t7 register in the trapframe.  Otherwise
we can run into a problem on SMP systems where a process is interrupted by
a trap or interrupt on one CPU, migrates to another CPU, and then returns
with the t7 in the stack clobbering the CPU's t7.  As a result, two CPU's
would both point to the same per-CPU data and things would go downhill from
there.

Sleuthing help by:	gallatin
2001-04-17 02:44:35 +00:00
John Baldwin
1a72a97045 - Stop other CPU's in the SMP case when we enter ddb.
- Add a new ddb command: 'show pcpu' similar to the i386 command added
  recently.  By default it displays the current CPU's info, but an optional
  argument can specify the logical ID of a specific CPU to examine.
2001-04-17 02:41:41 +00:00
David E. O'Brien
c5e70d92ce Turn on kernel debugging support (DDB, INVARIANTS, INVARIANT_SUPPORT, WITNESS)
by default while SMPng is still being developed.

Submitted by:	jhb
2001-04-15 19:37:28 +00:00
John Baldwin
2fea957dc5 Rename the IPI API from smp_ipi_* to ipi_* since the smp_ prefix is just
"redundant noise" and to match the IPI constant namespace (IPI_*).

Requested by:	bde
2001-04-11 17:06:02 +00:00
John Baldwin
45fdf62519 Parse the various argument registers in the printtrap() function so that
one doesn't have to go grab a reference manual to decode them by hand every
time the alpha kernel falls over.

Reviewed by:	drew, -alpha
2001-04-11 16:20:11 +00:00
Andrew Gallatin
ceca66bb01 insert a magical second memory barrier prior to calling draina() in
badaddr_read().  This fixes 'machine check in pal mode' halts on
ev5 2100As.

MFC candidate -- after spending 6 hours tracking this down, I checked and
discovered that it has been in NetBSD for over a year, so it should be safe
for MFC into 4.3-RELEASE
2001-04-08 16:43:59 +00:00
Andrew Gallatin
9a44dfa794 Regen after adding linux_sched_get_priority_max() and
linux_sched_get_priority_min()
2001-04-03 18:01:41 +00:00
Andrew Gallatin
a7f70675e9 Add linux_sched_get_priority_max() and linux_sched_get_priority_min() to
alpha md code & unbreak kernel build
2001-04-03 17:58:44 +00:00
Andrew Gallatin
bb193d2a6b Recognize a few newer cpus (pca57, ev67 & ev68) and update systypes to
include "CUSCO" and "Eiger" while I'm at it.
2001-03-30 22:04:08 +00:00
David E. O'Brien
083c3fbb6f Removed the ``#if 0'' that turned bounds_check_with_label() into worse
than a NOP.  bounds_check_with_label() would return -1 yet NOT set any
of the bio flags to show an error.  This meant the caller would not
properly see that bounds_check_with_label() did not do any work.  This
prevented newfs(8) from being able to write a file system on any partition
other than `c' on a `ccd'.

The logs of this file do not tell _why_ bounds_check_with_label() was
emasculated.  Nor are there any `XXX' comments.  So we'll unemasculated
it, and see what breaks.

Submitted by:	gallatin
2001-03-29 20:18:45 +00:00
Andrew Gallatin
57d4ab2d3e resurrect the declaration of order to unbreak kernel build. Put
it inside the ifdef so as to avoid unused variable warnings
2001-03-28 19:02:08 +00:00
John Baldwin
1005a129e5 Convert the allproc and proctree locks from lockmgr locks to sx locks. 2001-03-28 11:52:56 +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
192846463a 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
John Baldwin
0006681fe6 Switch from save/disable/restore_intr() to critical_enter/exit(). 2001-03-28 03:06:10 +00:00
John Baldwin
6283b7d01b - 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
John Baldwin
034dc442ad - Add the new critical_t type used to save state inside of critical
sections.
- Add implementations of the critical_enter() and critical_exit() functions
  and remove restore_intr() and save_intr().
- Remove the somewhat bogus disable_intr() and enable_intr() functions on
  the alpha as the alpha actually uses a priority level and not simple bit
  flag on the CPU.
2001-03-28 02:31:54 +00:00
John Baldwin
090697c65b Revert previous commit which had a bogus message. It actually just
disabled the somewhat annoying KTR log trace for clock interrupts.
2001-03-28 02:03:29 +00:00
John Baldwin
82da2f64b3 - 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
Andrew Gallatin
919eea6db9 Check whether we need to do a full restore after handling ASTs. If
an AST results in a signal being delivered, we'll need to do a full register
restore so as to properly setup the signal handler.  This is somewhat of
a pessimization, because ast() will be called twice in this case.

This fixes several problems that have been reported where signal intensive
userland apps (most notably dump) have been SEGV'ing for no fault of their
own.

Thanks to Peter Jeremy <peter.jeremy@alcatel.com.au> for presenting the
AST scenario which led to me fiinally figuring this out.

Reviewed by: jhb
2001-03-28 01:19:41 +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
Hajimu UMEMOTO
8b625cb701 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
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
Peter Wemm
6eb39ac8fc 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
Andrew Gallatin
283da0012f prevent gdb from panic'ing an alpha with "mutex Giant not owned"
reviewed by: jhb
2001-03-16 21:44:21 +00:00
Andrew Gallatin
64007795de 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
John Baldwin
0fb8828fe2 - Call fork1() directly instead of calling rfork() so that it doesn't mask
out RFSTOPPED.
- Lock the child process when settings p_sigparent instead of locking the
  parent.

Pointy-hat to:	me
2001-03-11 23:41:55 +00:00
John Baldwin
5db078a9be 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
John Baldwin
136d8f42b9 Unrevert the pmap_map() changes. They weren't broken on x86.
Sense beaten into me by:	peter
2001-03-07 05:29:21 +00:00
John Baldwin
f227364a17 - Release Giant a bit earlier on syscall exit.
- Don't try to grab Giant before postsig() in userret() as it is no longer
  needed.
- Don't grab Giant before psignal() in ast() but get the proc lock instead.
2001-03-07 03:53:39 +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
ff655691d8 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
John Baldwin
88411ba791 Just use proc lock to protect reading of p_pptr rather than a proctree
lock.
2001-03-07 03:18:36 +00:00
John Baldwin
4a01ebd482 Back out the pmap_map() change for now, it isn't completely stable on the
i386.
2001-03-07 01:04:17 +00:00
John Baldwin
968950e5d1 - Rework pmap_map() to take advantage of direct-mapped segments on
supported architectures such as the alpha.  This allows us to save
  on kernel virtual address space, TLB entries, and (on the ia64) VHPT
  entries.  pmap_map() now modifies the passed in virtual address on
  architectures that do not support direct-mapped segments to point to
  the next available virtual address.  It also returns the actual
  address that the request was mapped to.
- On the IA64 don't use a special zone of PV entries needed for early
  calls to pmap_kenter() during pmap_init().  This gets us in trouble
  because we end up trying to use the zone allocator before it is
  initialized.  Instead, with the pmap_map() change, the number of needed
  PV entries is small enough that we can get by with a static pool that is
  used until pmap_init() is complete.

Submitted by:		dfr
Debugging help:		peter
Tested by:		me
2001-03-06 06:06:42 +00:00
John Baldwin
6ad0e7c5cc Create clone'd linux processes as stopped processes at first and don't
actually make them runnable until after the emulator layer has had a chance
to perform fixups.
2001-03-06 02:59:46 +00:00
John Baldwin
1e3592df94 Quiet a warning due to bus_size_t being a long on the alpha. 2001-03-06 02:52:06 +00:00
Andrew Gallatin
c350c330da handle reserved/unimplemented instruction (opDec) faults
This lets us run programs containing newer (eg bwx) instructions
on older (eg EV5 and less) machines.  One win is that we can
now run Acrobat4 on EV4s and EV5s.

Obtained from: NetBSD
Glanced at by: mjacob
2001-03-05 21:21:01 +00:00
Andrew Gallatin
9ccd73f2ee Add MODULE_DEPEND() for the sysvipc modules. This allows the linulator
to load when sysvipc is not in the kernel

Reported by: naddy@mips.inka.de (Christian Weisgerber)
2001-03-05 17:59:18 +00:00
Andrew Gallatin
d905e2f482 sync with i386:
MFS: bring the consistent `compat_3_brand' support

This should fix the linux-related panics reported
by naddy@mips.inka.de (Christian Weisgerber)

Forgotten by: obrien
2001-03-05 17:56:58 +00:00
Andrew Gallatin
f7c3f9d72f Fix the unaligned access code to handle stores from R31 (zero)
PR alpha/25535
2001-03-05 16:18:23 +00:00
Doug Rabson
768a854cad Disable interrupts while sanity checking the owner of the floating point
state. It is possible that we could be preempted part way through the
check.
2001-03-04 23:29:23 +00:00
Doug Rabson
30c190a0aa Account for the new flags field in struct trapframe. 2001-03-03 15:11:37 +00:00
John Baldwin
938f15c7c4 Rename switch_trampoline() to fork_trampoline() on the alpha and ia64.
Suggested by:	dfr
2001-02-22 16:56:53 +00:00
John Baldwin
26f9f5c7c7 - Use TRAPF_PC() on the alpha to acess the PC in the trap frame.
- Don't hold sched_lock around addupc_task() as this apparently breaks
  profiling badly due to sched_lock being held across copyin().

Reported by:	bde (2)
2001-02-22 16:23:12 +00:00
John Baldwin
0246af0995 GC unused and now obsolete assertion macros. 2001-02-22 15:45:49 +00:00
John Baldwin
3621af321e Cleanup and clarify the comments above switch_trampoline(). 2001-02-22 15:06:19 +00:00
John Baldwin
719f43d3df Remove attempt to add in PREEMPTION #ifdef test in MI code that didn't
work because opt_preemption.h wasn't #include'd.  Instead, make use of the
do_switch parameter to ithread_schedule() and do the check in the alpha
interrupt code.
2001-02-21 22:51:00 +00:00
Andrew Gallatin
2b1525e1b5 Fix the osfulator in the face of Doug's optimized system call return path.
We now need to set [FRAME_FLAGS] to zero to force a full restore of state
after a signal.

reported by: naddy@mips.inka.de (Christian Weisgerber)
2001-02-21 18:48:06 +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
John Baldwin
5813dc03bd - 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
Andrew Gallatin
8859907478 Regen 2001-02-20 03:48:53 +00:00
Andrew Gallatin
c9eeb59a01 Sort out the umount breakage introduced in the last 2 revisions.
Please note:
When committing changes to this file, it is important to note that
linux is not freebsd -- their system call numbers (and sometimes names)
are different on different platforms.  When in doubt (and you always need
to be) check the arch-specific unistd.h and entry.S files in the linux
kernel sources to see what the syscall numbers really are.
2001-02-20 03:47:59 +00:00
Jonathan Lemon
203e686755 Regenerate. 2001-02-20 02:16:38 +00:00
Jonathan Lemon
6de4a7300a Fix duplicate linux_mount definition 2001-02-20 02:16:07 +00:00
Bruce Evans
866546105a Changed the aston() family to operate on a specified process instead of
always on curproc.  This is needed to implement signal delivery properly
(see a future log message for kern_sig.c).

Debogotified the definition of aston().  aston() was defined in terms
of signotify() (perhaps because only the latter already operated on
a specified process), but aston() is the primitive.

Similar changes are needed in the ia64 versions of cpu.h and trap.c.
I didn't make them because the ia64 is missing the prerequisite changes
to make astpending and need_resched per-process and those changes are
too large to make without testing.
2001-02-19 04:15:59 +00:00
Hajimu UMEMOTO
e335205699 Correct disordering which is corresponding to bde's fix to
i386/include/ansi.h.
2001-02-17 14:51:11 +00:00
Jonathan Lemon
2459336973 Allow debugging output to be controlled on a per-syscall granularity.
Also clean up debugging output in a slightly more uniform fashion.

The default behavior remains the same (all debugging output is turned on)
2001-02-16 16:40:43 +00:00
Jonathan Lemon
a25f3493bc Re-gen auto generated files. 2001-02-16 14:47:24 +00:00
Jonathan Lemon
3417b54986 Remove dummy stub functions. 2001-02-16 14:46:16 +00:00
Jonathan Lemon
705deb78a3 Add mount syscall to linux emulation. Also improve emulation of reboot. 2001-02-16 14:42:11 +00:00
Hajimu UMEMOTO
ad9fdc8f4d Correct 2nd argument of getnameinfo(3) to socklen_t.
Reviewed by:	itojun
2001-02-15 10:35:55 +00:00
Matt Jacob
888620f24e Doug found that doing a W1C on MCPCIA_INT_REQ just around the time you
clear MCPCIA_INT_MASK0 helps things substantially. So, why not indeed?

Rearrange irq and cookie calculation to use shifts/masks instead
of division. Fix things to correctly remember the intpin for that
one in a million non-INTA PCI device.
2001-02-13 22:48:12 +00:00
Matt Jacob
d2a4644848 add defines for EISA, NCR IRQs; add defines for MID and SLOT shift values 2001-02-13 22:46:30 +00:00
Matt Jacob
e3981f1a78 add mcbus minimum id value 2001-02-13 22:45:53 +00:00
Matt Jacob
fcd34891a6 Doug noticed that the bit values for _MCPCIA_INT_ACK0/_MCPCIA_INT_ACK1
made no sense in the context of wrapping them within the _SYBRIDGE macro-
or anything like it- so we concluded that this must have been a typo
in the docs.  This also doesn't use the same bridge offset as anything
else.

Add some defines for the INT_CTL register.
2001-02-13 22:44:21 +00:00
Jake Burkholder
d5a08a6065 Implement a unified run queue and adjust priority levels accordingly.
- All processes go into the same array of queues, with different
  scheduling classes using different portions of the array.  This
  allows user processes to have their priorities propogated up into
  interrupt thread range if need be.
- I chose 64 run queues as an arbitrary number that is greater than
  32.  We used to have 4 separate arrays of 32 queues each, so this
  may not be optimal.  The new run queue code was written with this
  in mind; changing the number of run queues only requires changing
  constants in runq.h and adjusting the priority levels.
- The new run queue code takes the run queue as a parameter.  This
  is intended to be used to create per-cpu run queues.  Implement
  wrappers for compatibility with the old interface which pass in
  the global run queue structure.
- Group the priority level, user priority, native priority (before
  propogation) and the scheduling class into a struct priority.
- Change any hard coded priority levels that I found to use
  symbolic constants (TTIPRI and TTOPRI).
- Remove the curpriority global variable and use that of curproc.
  This was used to detect when a process' priority had lowered and
  it should yield.  We now effectively yield on every interrupt.
- Activate propogate_priority().  It should now have the desired
  effect without needing to also propogate the scheduling class.
- Temporarily comment out the call to vm_page_zero_idle() in the
  idle loop.  It interfered with propogate_priority() because
  the idle process needed to do a non-blocking acquire of Giant
  and then other processes would try to propogate their priority
  onto it.  The idle process should not do anything except idle.
  vm_page_zero_idle() will return in the form of an idle priority
  kernel thread which is woken up at apprioriate times by the vm
  system.
- Update struct kinfo_proc to the new priority interface.  Deliberately
  change its size by adjusting the spare fields.  It remained the same
  size, but the layout has changed, so userland processes that use it
  would parse the data incorrectly.  The size constraint should really
  be changed to an arbitrary version number.  Also add a debug.sizeof
  sysctl node for struct kinfo_proc.
2001-02-12 00:20:08 +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
Matt Jacob
c83633a4ff Temporary workaround to get things to compile. I could have updated
genassym here, but what I've also noticed is that we're dorking
with a mutex directly at assembler level- I'm not sure that this
is wise at this stage in the SMP port- I think it's going to be much
safer for a while to do things in C until SMP wunderkind figure out
what works and slow down this 3 order differential...
2001-02-10 23:22:49 +00:00
Jake Burkholder
3cbe75a414 Clear the reschedule flag after finding it set in userret(). This
used to be in cpu_switch(), but I don't see any difference between
doing it here.
2001-02-10 20:33:35 +00:00
John Baldwin
37ea3ced36 Reenable preemption on interrupts. My last commit accidentally reverted
it as I was playing with some other ways of doing kernel preemption.

You must still specify the PREEMPTION option in your config file to get a
preemptive kernel.
2001-02-10 02:46:50 +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
e109e2b4cd 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
John Baldwin
522be16a94 Use the MI ithread helper functions in the alpha hardware interrupt code. 2001-02-09 17:53:23 +00:00
John Baldwin
062d8ff5a0 - Catch up to the new swi API changes:
- Use swi_* function names.
  - Use void * to hold cookies to handlers instead of struct intrhand *.
- In sio.c, use 'driver_name' instead of "sio" as the name of the driver
  lock to minimize diffs with cy(4).
2001-02-09 17:46:35 +00:00
John Baldwin
929604ec9b Move the initailization of the proc lock for proc0 very early into the MD
startup code.
2001-02-09 16:25:16 +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
9a01d32bfd Fix typo: seperate -> separate.
Seperate does not exist in the english language.

Submitted to look at by:	kris
2001-02-06 10:39:38 +00:00
Jeroen Ruigrok van der Werven
294939dced Fix typo: wierd -> weird. 2001-02-06 09:20:17 +00:00
John Baldwin
f933f02094 - Minimize the amount of duplicated code for the PREEMPTION #ifdef, it now
only covers about 3-4 lines.
- Don't lower the IPL while we are on the interrupt stack.  Instead, save
  the raised IPL and change the saved IPL in sched_lock to IPL_0 before
  calling mi_switch().  When we are resumed, restore the saved IPL in
  sched_lock to the saved raised IPL so that when we release sched_lock
  we won't lower the IPL.  Without this, we would get nested interrupts
  that would overflow the kernel stack.

Tested by:	mjacob
2001-02-05 19:34:25 +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
Peter Wemm
bcf77694d1 Clean up some leftovers from the root mount cleanup that was done some
time ago.  FFS_ROOT and CD9660_ROOT are obsolete.
2001-02-04 15:35:10 +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
Peter Wemm
7aef6a1e88 All the world is not an i386. Merge rev 1.438 of i386/i386/machdep.c.
Make buffer_map a system map.
2001-02-04 07:00:47 +00:00
Peter Wemm
2c083a42ed Grumble, I broke this file with a vi accident before commit. :-(
Submitted by: Christian Weisgerber <naddy@mips.inka.de>
2001-02-04 04:13:12 +00:00
Peter Wemm
acbecce3e1 Conditionalize the alpha interrupt preemption for now to buy us some
time to sort out the quirks.  Add 'options PREEMPTION' to test it on
the Alpha.

Reviewed by: jhb
2001-02-03 03:26:39 +00:00
Doug Rabson
294156a7ff * 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.
2001-02-02 10:20:30 +00:00
Peter Wemm
ed4f8196d0 Argh, I missed some #include "sio.h". I was looking primarily for NSIO
when I did my sweeps.

Submitted by: mjacob
2001-02-02 01:48:40 +00:00
Matt Jacob
6f7809f526 Remove inclusion of now vanished sio.h. 2001-02-01 21:59:00 +00:00
Matt Jacob
b91d22ca89 Guess that this is what Doug *intended* to commit.... 2001-02-01 21:58:34 +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
Doug Rabson
c586bc8e57 * 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
Peter Wemm
8ab109d131 Remove count for NSIO. The only places it was used it were incorrect.
(alpha-gdbstub.c got sync'ed up a bit with the i386 version)
2001-01-31 10:54:45 +00:00
John Baldwin
7ad1d369bb Remove unnecessary locking to protect the p_upages_obj and p_addr
pointers.
2001-01-30 00:35:35 +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
Andrew Gallatin
28c039e747 The API UP1100 is close enough to a UP1000 that FreeBSD just works on it, so
document that fact.

Thanks to Peter Petrakis <ppetrakis@alphalinux.org> for doing a test boot.
2001-01-27 20:56:00 +00:00
John Baldwin
cf0be84ff5 Turn on DEVFS by default for the alpha. Aside from vinum as mentioned by
phk it should work fine.  If you need vinum, then don't add this to your
kernel config until vinum catches up to DEVFS.
2001-01-27 08:34:58 +00:00
John Baldwin
a0346459f1 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
Andrew Gallatin
97e32dadb4 The osfulator needs sysvipc to work. Thanks to DES's commit to
the i386 linulator for pointing this out.

The alpha linulator doesn't need a dependancy, as it already
depends on the osfulator.
2001-01-26 17:12:30 +00:00
John Baldwin
7b1bec368f Back out over-aggressive locking of p->p_cred.
Requested by:	alfred
2001-01-25 01:09:44 +00:00
John Baldwin
29d3cf45a7 Remove prototype for child_return(). 2001-01-24 22:00:13 +00:00
John Baldwin
2a36ec35ae - 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
John Baldwin
77e9b2790e - Remove some unused and unneeded atomic operations sitting in mp_machdep.c
that are already implemented in atomic.h.
- Fix SMP kernel builds.
2001-01-24 19:49:13 +00:00
John Baldwin
c2e9063250 Oops, when converting if (foo) panic() to a KASSERT(), you have to invert
the test case.

Spotted by:	peter, jasone
2001-01-24 13:10:17 +00:00