Commit Graph

1651 Commits

Author SHA1 Message Date
KATO Takenori
8e929d6553 Some of newer PC-98 may cause "Windows Protection Fault" when booting
Windows 95 after rebooting FreeBSD without power off.  In PC-98
system, reboot mode is set via I/O port 0x37 in cpu_reset(), and
accessing of this port is the reason of the problem.  To avnoid the
fault, current status of reboot mode should be checked before
accessing the I/O port.
1998-05-16 14:44:11 +00:00
KATO Takenori
0d303cbabf Disable local APIC in UP kernel. Intel specification update describes
that local APIC should be disabled in UP system.  However, some of old
BIOS does not disable local APIC, and virtual wire mode through local
APIC may cause int 15.
1998-05-16 14:38:10 +00:00
John Dyson
424edf1b6a Disable the auto-Write Combining setup for the pmap code. This
worked on a couple of machines of mine, but appears to cause problems
on others.
1998-05-15 07:25:25 +00:00
John Dyson
cfa5644b2b Some temporary fixes to SMP to make it more scheduling and signal friendly.
This is a result of discussions on the mailing lists.  Kudos to those who
have found the issue and created work-arounds.  I have chosen Tor's fix
for now, before we can all work the issue more completely.
Submitted by:		Tor Egge
1998-05-12 18:37:10 +00:00
John Dyson
471176aa5d Fix alot of silly LINT that I left in the code. 1998-05-12 18:28:05 +00:00
Bruce Evans
b322fb5d76 Backed out previous commit. It is invalid to call d_ioctl() on
possibly non-open devices, and we don't want to restrict dumping
to swap devices anwyay.  It is especially invalid to call d_ioctl()
in non-process context for panics.  d_psize() can be called on
non-open devices, at least on non-SLICED ones that support d_dump(),
and setdumpdev() has depended on this for a long time although it
is probably wrong, but even d_psize() can't be called in non-process
context - that's why dumpsys() depends on previously computed values
although these values may be stale.  The historical restriction to
devices with dkpart(dev) == SWAP_PART should go away.
1998-05-12 17:34:02 +00:00
John Dyson
fcf1880fa0 Change some tests from CPU_CLASS686 to CPU_686 as appropriate, and
also correct a serious ommision that would cause process faulures
due to forgetting an invltlb type operatino.  This was just a
transcription problem.
1998-05-11 08:11:57 +00:00
John Dyson
5498a452bc Support better performance with P6 architectures and in SMP
mode.  Unnecessary TLB flushes removed.  More efficient
page zeroing on P6 (modify page only if non-zero.)
1998-05-11 02:13:47 +00:00
John Dyson
f0175db1ee Attempt to set write combining mode for graphics devices. 1998-05-11 01:06:08 +00:00
Julian Elischer
7f2f1b784e Add dump support to the DEVFS/slice code.
now we can actually catch our crashes :-)

Submitted by: Luoqi Chen <luoqi@chen.ml.org> (the man who's everywhere)
1998-05-06 22:14:48 +00:00
Justin T. Gibbs
8fddb21ee2 Implement bus_dmamem_* functions and correct a few nits reported by Peter Wemm. 1998-05-06 01:45:55 +00:00
Eivind Eklund
288078be0f Translate T_PROTFLT to SIGSEGV instead of SIGBUS when running under
Linux emulation.  This make Allegro Common Lisp 4.3 work under
FreeBSD!

Submitted by: Fred Gilham <gilham@csl.sri.com>
Commented on by: bde, dg, msmith, tg
Hoping he got everything right:  eivind
1998-04-28 18:15:08 +00:00
Dag-Erling Smørgrav
bf69d84c0a Cast return values to the appropriate fp_*_t. Note that the man page
incorrectly refers to them as e.g. fp_except rather than fp_except_t.

PR:		misc/6310
Submitted by:	Niall Smart
1998-04-27 14:17:30 +00:00
John Dyson
e8f1b8b02a Add the PAT cpuid feature. 1998-04-26 03:18:38 +00:00
Tor Egge
beede91e58 Mask the interrupt before setting the corresponding bit in ipending if
the interrupt is already active.
Don't use lock prefix for operations on ipending.
Always use lock prefix for operations on iactive.
1998-04-22 22:49:29 +00:00
Matt Jacob
8bafc2452a Add support for the Qlogic ISP SCSI && FC/AL Adapters 1998-04-22 18:18:16 +00:00
Julian Elischer
751e9ca706 Remove an LFS clause, now that it is in the history,
anyone who wants to see what was needed cto revive LFS can see it.
1998-04-20 21:53:07 +00:00
Julian Elischer
c0bab11dfe Make the devfs SLICE option a standard type option.
(hopefully it will go away eventually anyhow)
1998-04-20 03:57:41 +00:00
Julian Elischer
3e425b968d Add changes and code to implement a functional DEVFS.
This code will be turned on with the TWO options
DEVFS and SLICE. (see LINT)
Two labels PRE_DEVFS_SLICE and POST_DEVFS_SLICE will deliniate these changes.

/dev will be automatically mounted by init (thanks phk)
on bootup. See /sys/dev/slice/slice.4 for more info.
All code should act the same without these options enabled.

Mike Smith, Poul Henning Kamp, Soeren, and a few dozen others

This code does not support the following:
bad144 handling.
Persistance. (My head is still hurting from the last time we discussed this)
ATAPI flopies are not handled by the SLICE code yet.

When this code is running, all major numbers are arbitrary and COULD
be dynamically assigned. (this is not done, for POLA only)
Minor numbers for disk slices ARE arbitray and dynamically assigned.
1998-04-19 23:32:49 +00:00
Bruce Evans
212b37ff18 Support compiling with `gcc -pedantic' (don't use hard newlines in
(asm) string constants).
1998-04-19 15:41:06 +00:00
Bruce Evans
1696756396 Support compiling with `gcc -pedantic' (don't use hard newlines in
(asm) string constants or hard long long constants).
1998-04-19 15:39:26 +00:00
Bruce Evans
8c4a6d7452 Support compiling with `gcc-pedantic' (don't use hard newlines in
(asm) string constants or trailing commas in enum declarations).
1998-04-19 15:28:30 +00:00
Bruce Evans
78a8182665 Support compiling with gcc -pedantic (don't use a bogus, null cast). 1998-04-19 15:22:48 +00:00
Dag-Erling Smørgrav
dc73342347 Seventy-odd "its" / "it's" typos in comments fixed as per kern/6108. 1998-04-17 22:37:19 +00:00
Bruce Evans
1d37f051c1 Finish supporting compiling with gcc -ansi'. Fix missing volatile's
in __asm() statements while I'm here.
1998-04-15 18:58:09 +00:00
Bruce Evans
c1087c1324 Support compiling with `gcc -ansi'. 1998-04-15 17:47:40 +00:00
Bruce Evans
dcfe005838 Fixed breakage of fork accounting in previous commit. A fork benchmark
reported about 15 times as much sys time as real time.  getmicroruntime()
is confusing name.
1998-04-15 11:10:28 +00:00
Peter Wemm
514bc6cb56 Fix VM86 compiles. a #include "opt_vm86.h" was missing, and the my_tr
variable was needed in the non-SMP case.

Submitted by:  Jonathan Lemon <jlemon@americantv.com>
1998-04-06 18:59:15 +00:00
Peter Wemm
fa1ef19485 remove #ifdef declaration of npxproc, use globals.s and the extern always. 1998-04-06 15:50:29 +00:00
Peter Wemm
cf34ef61ee Use real types for the SMP pages being allocated rather than arrays of
ints.  Remove some no longer needed casts.  Initialize the per-cpu
global data area using the structs rather than knowing too much about
layout, alignment, etc.
1998-04-06 15:48:30 +00:00
Peter Wemm
0c8df3b4c5 clean up #ifdefs, define the variables that have to be per-cpu on SMP
in globals.s only and use externs always.
1998-04-06 15:46:17 +00:00
Peter Wemm
741643627f _curpcb is always defined in globals.s instead of here in #ifdefs 1998-04-06 15:44:31 +00:00
Peter Wemm
55caa497cb Bogus casts 1998-04-06 15:43:29 +00:00
Peter Wemm
858118ef47 Rather than filling this file up with SMP .sets, use those from
globals.s instead.
Initialize curproc in the same place for both UP and SMP.
1998-04-06 15:42:26 +00:00
Peter Wemm
e3f5516d18 Generate #defines that the asm code can access for the per-cpu data
structures.
1998-04-06 15:40:10 +00:00
Peter Wemm
937288c5bb A pair of C structures used for laying out the SMP per-cpu data space. 1998-04-06 15:37:21 +00:00
Poul-Henning Kamp
4cf41af3d4 Make a kernel version of the timer* functions called timerval* to be
more consistent.

OK'ed by:	bde
1998-04-06 08:26:08 +00:00
Tor Egge
c547ef5cd4 Remove some unneeded statements that enabled interrupts. 1998-04-05 01:04:48 +00:00
Poul-Henning Kamp
00af9731c9 Time changes mark 2:
* Figure out UTC relative to boottime.  Four new functions provide
      time relative to boottime.

    * move "runtime" into struct proc.  This helps fix the calcru()
      problem in SMP.

    * kill mono_time.

    * add timespec{add|sub|cmp} macros to time.h.  (XXX: These may change!)

    * nanosleep, select & poll takes long sleeps one day at a time

Reviewed by:    bde
Tested by:      ache and others
1998-04-04 13:26:20 +00:00
Tor Egge
5758c2de94 Add two workarounds for broken MP tables:
- Attempt to handle PCI devices where the interrupt is
	  an ISA/EISA interrupt according to the mp table.

	- Attempt to handle multiple IO APIC pins connected to
	  the same PCI or ISA/EISA interrupt source.  Print a
	  warning if this happens, since performance is suboptimal.
	  This workaround is only used for PCI devices.

With these two workarounds, the -SMP kernel is capable of running on
my Asus P/I-P65UP5 motherboard when version 1.4 of the MP table is disabled.
1998-04-01 21:07:37 +00:00
Tor Egge
300e9a7696 Declare some variables modified by interrupt handlers as volatile. 1998-04-01 20:38:28 +00:00
Poul-Henning Kamp
227ee8a188 Eradicate the variable "time" from the kernel, using various measures.
"time" wasn't a atomic variable, so splfoo() protection were needed
around any access to it, unless you just wanted the seconds part.

Most uses of time.tv_sec now uses the new variable time_second instead.

gettime() changed to getmicrotime(0.

Remove a couple of unneeded splfoo() protections, the new getmicrotime()
is atomic, (until Bruce sets a breakpoint in it).

A couple of places needed random data, so use read_random() instead
of mucking about with time which isn't random.

Add a new nfs_curusec() function.

Mark a couple of bogosities involving the now disappeard time variable.

Update ffs_update() to avoid the weird "== &time" checks, by fixing the
one remaining call that passwd &time as args.

Change profiling in ncr.c to use ticks instead of time.  Resolution is
the same.

Add new function "tvtohz()" to avoid the bogus "splfoo(), add time, call
hzto() which subtracts time" sequences.

Reviewed by:	bde
1998-03-30 09:56:58 +00:00
Peter Dufault
8a6472b723 Finish _POSIX_PRIORITY_SCHEDULING. Needs P1003_1B and
_KPOSIX_PRIORITY_SCHEDULING options to work.  Changes:

Change all "posix4" to "p1003_1b".  Misnamed files are left
as "posix4" until I'm told if I can simply delete them and add
new ones;

Add _POSIX_PRIORITY_SCHEDULING system calls for FreeBSD and Linux;

Add man pages for _POSIX_PRIORITY_SCHEDULING system calls;

Add options to LINT;

Minor fixes to P1003_1B code during testing.
1998-03-28 11:51:01 +00:00
Bruce Evans
08637435f2 Moved some #includes from <sys/param.h> nearer to where they are actually
used.
1998-03-28 10:33:27 +00:00
Jonathan Lemon
640c4313af Add the ability to make real-mode BIOS calls from the kernel. Currently,
everything is contained inside #ifdef VM86, so this option must be
present in the config file to use this functionality.

Thanks to Tor Egge, these changes should work on SMP machines.  However,
it may not be throughly SMP-safe.

Currently, the only BIOS calls made are memory-sizing routines at bootup,
these replace reading the RTC values.
1998-03-23 19:52:59 +00:00
KATO Takenori
61324207f1 Make EPSON_BOUNCEDMA a new-style option. 1998-03-17 09:11:03 +00:00
Mike Smith
4d1b2b52df Add missing entry to list of major device names. This list should not
exist.
1998-03-17 00:28:02 +00:00
Mike Smith
14e6f79297 Spell 'compatibility' like everyone else. 1998-03-16 12:07:54 +00:00
Mike Smith
2167f84289 Use dkmakeminor() rather than magic knowledge of the size and location of
the slice field.  Handle incomprehensible slice numbers slightly better.
Suggested by:	bde
1998-03-16 11:50:39 +00:00
Poul-Henning Kamp
7ab95d0bab Be less draconian about the TSC if APM is configured, use it for
timecounting if APM-BIOS isn't found.
Be just as draconian about SMP as always, but explain it better.
1998-03-16 10:06:58 +00:00
John Dyson
bef608bd7e Some VM improvements, including elimination of alot of Sig-11
problems.  Tor Egge and others have helped with various VM bugs
lately, but don't blame him -- blame me!!!

pmap.c:
1)	Create an object for kernel page table allocations.  This
	fixes a bogus allocation method previously used for such, by
	grabbing pages from the kernel object, using bogus pindexes.
	(This was a code cleanup, and perhaps a minor system stability
	 issue.)

pmap.c:
2)	Pre-set the modify and accessed bits when prudent.  This will
	decrease bus traffic under certain circumstances.

vfs_bio.c, vfs_cluster.c:
3)	Rather than calculating the beginning virtual byte offset
	multiple times, stick the offset into the buffer header, so
	that the calculated offset can be reused.  (Long long multiplies
	are often expensive, and this is a probably unmeasurable performance
	improvement, and code cleanup.)

vfs_bio.c:
4)	Handle write recursion more intelligently (but not perfectly) so
	that it is less likely to cause a system panic, and is also
	much more robust.

vfs_bio.c:
5)	getblk incorrectly wrote out blocks that are incorrectly sized.
	The problem is fixed, and writes blocks out ONLY when B_DELWRI
	is true.

vfs_bio.c:
6)	Check that already constituted buffers have fully valid pages.  If
	not, then make sure that the B_CACHE bit is not set. (This was
	a major source of Sig-11 type problems.)

vfs_bio.c:
7)	Fix a potential system deadlock due to an incorrectly specified
	sleep priority while waiting for a buffer write operation.  The
	change that I made opens the system up to serious problems, and
	we need to examine the issue of process sleep priorities.

vfs_cluster.c, vfs_bio.c:
8)	Make clustered reads work more correctly (and more completely)
	when buffers are already constituted, but not fully valid.
	(This was another system reliability issue.)

vfs_subr.c, ffs_inode.c:
9)	Create a vtruncbuf function, which is used by filesystems that
	can truncate files.  The vinvalbuf forced a file sync type operation,
	while vtruncbuf only invalidates the buffers past the new end of file,
	and also invalidates the appropriate pages.  (This was a system reliabiliy
	and performance issue.)

10)	Modify FFS to use vtruncbuf.

vm_object.c:
11)	Make the object rundown mechanism for OBJT_VNODE type objects work
	more correctly.  Included in that fix, create pager entries for
	the OBJT_DEAD pager type, so that paging requests that might slip
	in during race conditions are properly handled.  (This was a system
	reliability issue.)

vm_page.c:
12)	Make some of the page validation routines be a little less picky
	about arguments passed to them.  Also, support page invalidation
	change the object generation count so that we handle generation
	counts a little more robustly.

vm_pageout.c:
13)	Further reduce pageout daemon activity when the system doesn't
	need help from it.  There should be no additional performance
	decrease even when the pageout daemon is running.  (This was
	a significant performance issue.)

vnode_pager.c:
14)	Teach the vnode pager to handle race conditions during vnode
	deallocations.
1998-03-16 01:56:03 +00:00
Mike Smith
0fd31d39fa Use dsname() to generate the disk region name for the "changing root
device to" message.  Suppress this message if only the slice number
has changed.
1998-03-15 04:42:23 +00:00
Tor Egge
c555a715f5 On SMP systems, initially follow the MP spec with regard to which pin
on the IOAPIC being connected to the 8254 timer interrupt.
Verify that timer interrupts are delivered. If they aren't, attempt
a fallback to mixed mode (i.e. routing the timer interrupt via the 8259 PIC).
1998-03-14 03:11:50 +00:00
Tor Egge
d20d60be28 Don't use the standard macros for disabling/enabling interrupt.
On SMP systems, this left the mpintr_lock simplelock locked, causing
further calls to disable_intr to deadlock or panic.
1998-03-14 03:02:15 +00:00
Bruce Evans
7762bc7bdf Fixed breakage of the !SMP case in vm_page_zero_idle() in the
previous commit.  Opportunities to clean pages were often missed,
and leaving of the idle state was sometimes delayed until the next
interrupt (after any that occurred while cleaning).

Fixed an unstaticization, a syntax error and a style bug in the
previous commit.
1998-03-12 09:55:57 +00:00
Bruce Evans
d1d9d2601f Don't depend on "implicit int" or bloat the data section in the
declaration of mem_devsw_installed.

Reduced include nesting.
1998-03-12 09:14:18 +00:00
Eivind Eklund
005092bba6 Turn "PMAP_SHPGPERPROC" into a new-style option, add it to LINT, and
document it there.
1998-03-09 22:09:13 +00:00
Mike Smith
72928bdadb "Correct behaviour" involves being consistent with the canonical names of
other partitions.  In this case, they appear in the first slice in the
WHOLE_DISK_SLICE case.
1998-03-09 08:35:33 +00:00
Mike Smith
34ef5a9d25 Merge from 2.2; behave correctly in the presence of a slice number that
doesn't directly correspond to the slice field in the device minor number.
1998-03-09 08:10:21 +00:00
Mike Smith
f2dddd5e99 Construct the minor number for the root device taking into account the
slice number passed in by the bootblocks.  This means the kernel will
not use the compatability slice to obtain the root filesystem when
booting from a sliced disk.

Use the extraction macros from reboot.h rather than stating them in full
again.
1998-03-08 15:06:55 +00:00
John Dyson
8f9110f6a1 This mega-commit is meant to fix numerous interrelated problems. There
has been some bitrot and incorrect assumptions in the vfs_bio code.  These
problems have manifest themselves worse on NFS type filesystems, but can
still affect local filesystems under certain circumstances.  Most of
the problems have involved mmap consistancy, and as a side-effect broke
the vfs.ioopt code.  This code might have been committed seperately, but
almost everything is interrelated.

1)	Allow (pmap_object_init_pt) prefaulting of buffer-busy pages that
	are fully valid.
2)	Rather than deactivating erroneously read initial (header) pages in
	kern_exec, we now free them.
3)	Fix the rundown of non-VMIO buffers that are in an inconsistent
	(missing vp) state.
4)	Fix the disassociation of pages from buffers in brelse.  The previous
	code had rotted and was faulty in a couple of important circumstances.
5)	Remove a gratuitious buffer wakeup in vfs_vmio_release.
6)	Remove a crufty and currently unused cluster mechanism for VBLK
	files in vfs_bio_awrite.  When the code is functional, I'll add back
	a cleaner version.
7)	The page busy count wakeups assocated with the buffer cache usage were
	incorrectly cleaned up in a previous commit by me.  Revert to the
	original, correct version, but with a cleaner implementation.
8)	The cluster read code now tries to keep data associated with buffers
	more aggressively (without breaking the heuristics) when it is presumed
	that the read data (buffers) will be soon needed.
9)	Change to filesystem lockmgr locks so that they use LK_NOPAUSE.  The
	delay loop waiting is not useful for filesystem locks, due to the
	length of the time intervals.
10)	Correct and clean-up spec_getpages.
11)	Implement a fully functional nfs_getpages, nfs_putpages.
12)	Fix nfs_write so that modifications are coherent with the NFS data on
	the server disk (at least as well as NFS seems to allow.)
13)	Properly support MS_INVALIDATE on NFS.
14)	Properly pass down MS_INVALIDATE to lower levels of the VM code from
	vm_map_clean.
15)	Better support the notion of pages being busy but valid, so that
	fewer in-transit waits occur.  (use p->busy more for pageouts instead
	of PG_BUSY.)  Since the page is fully valid, it is still usable for
	reads.
16)	It is possible (in error) for cached pages to be busy.  Make the
	page allocation code handle that case correctly.  (It should probably
	be a printf or panic, but I want the system to handle coding errors
	robustly.  I'll probably add a printf.)
17)	Correct the design and usage of vm_page_sleep.  It didn't handle
	consistancy problems very well, so make the design a little less
	lofty.  After vm_page_sleep, if it ever blocked, it is still important
	to relookup the page (if the object generation count changed), and
	verify it's status (always.)
18)	In vm_pageout.c, vm_pageout_clean had rotted, so clean that up.
19)	Push the page busy for writes and VM_PROT_READ into vm_pageout_flush.
20)	Fix vm_pager_put_pages and it's descendents to support an int flag
	instead of a boolean, so that we can pass down the invalidate bit.
1998-03-07 21:37:31 +00:00
Tor Egge
1146c3560f The APs now reload the interrupt descriptor table pointer after
f00f_hack has run.

Use the global r_idt descriptor in f00f_hack when in SMP mode,
so the APs find the relocated interrupt descriptor table.

Submitted by:	Partially from David A Adkins <adkin003@tc.umn.edu>
1998-03-07 20:16:49 +00:00
Tor Egge
5dd528cd4e Remove special handling for resuming clock interrupt when using APIC_IO.
The `generic' vector stubs do the right thing.
1998-03-05 21:45:53 +00:00
Tor Egge
622a086be3 Use t_idt instead of idt inside setidt() if f00f_hack() has relocated the IDT.
Submitted by:	Bruce Evans <bde@zeta.org.au>
1998-03-05 19:37:03 +00:00
KATO Takenori
3a94cb7f7d Defined CCR6 and CCR7 (configuration registers of M2 CPU.) 1998-03-04 11:39:16 +00:00
Peter Dufault
f3df61a1cd Reviewed by: msmith, bde long ago
Fix for RTPRIO scheduler to eliminate invalid context switches.
1998-03-04 10:25:03 +00:00
Tor Egge
02c1dc3bbc When entering the apic version of slow interrupt handler, level
interrupts are masked, and EOI is sent iff the corresponding ISR bit
is set in the local apic. If the CPU cannot obtain the interrupt
service lock (currently the global kernel lock) the interrupt is
forwarded to the CPU holding that lock.

Clock interrupts now have higher priority than other slow interrupts.
1998-03-03 22:56:30 +00:00
Tor Egge
3163861c7b Forward the signal if the process runs on a different CPU. This reduces
the signal handling latency for cpu-bound processes that performs very
few system calls.

The IPI for forcing an additional software trap is no longer dependent upon
BETTER_CLOCK being defined.
1998-03-03 20:55:26 +00:00
Tor Egge
fe9cd27373 Reduce timeout before assuming that forwarding of hardclock or softclock
failed. Don't complain on forwarding failure, unless
BETTER_CLOCK_DIAGNOSTIC is defined.
1998-03-03 20:09:14 +00:00
Tor Egge
221e0c595b forward_statclock and forward_hardclock are located in mp_machdep.c. 1998-03-03 19:44:34 +00:00
Peter Wemm
c8a7999933 Update the ELF image activator to use some of the exec resources rather
than rolling it's own.  This means that it now uses the "safe"
exec_map_first_page() to get the ld.so headers rather than risking a panic
on a page fault failure (eg: NFS server goes down).
Since all the ELF tools go to a lot of trouble to make sure everything
lives in the first page for executables, this is a win.  I have not seen
any ELF executable on any system where all the headers didn't fit in the
first page with lots of room to spare.
I have been running variations of this code for some time on my pure ELF
systems.
1998-03-02 05:47:58 +00:00
John Dyson
ffc82b0a70 1) Use a more consistent page wait methodology.
2)	Do not unnecessarily force page blocking when paging
	pages out.
3)	Further improve swap pager performance and correctness,
	including fixing the paging in progress deadlock (except
	in severe I/O error conditions.)
4)	Enable vfs_ioopt=1 as a default.
5)	Fix and enable the page prezeroing in SMP mode.

All in all, SMP systems especially should show a significant
improvement in "snappyness."
1998-03-01 04:18:54 +00:00
Poul-Henning Kamp
3301c800f5 Prevent the TSC from being used on APM machines, we have no idea if
it runs at a constant frequency.  This was less of an issue before,
because the TSC only interpolated in the HZ intervals, but now where
the timecounter is used all the way, this becomes much more visible.

Nit: Fix a printf which triggered the bde-filter.
1998-02-28 21:16:13 +00:00
John Dyson
660957521c Fix page prezeroing for SMP, and fix some potential paging-in-progress
hangs.  The paging-in-progress diagnosis was a result of Tor Egge's
excellent detective work.
Submitted by:	Partially from Tor Egge.
1998-02-25 03:56:15 +00:00
Bruce Evans
6aeb4f6474 Removed vestiges of previous microtime() implementation. 1998-02-25 02:20:30 +00:00
John Dyson
d9bed5bee1 Try to dynamically size the VM_KMEM_SIZE (but is still able to be overridden
in a way identically as before.)  I had problems with the system properly
handling the number of vnodes when there is alot of system memory, and the
default VM_KMEM_SIZE.  Two new options "VM_KMEM_SIZE_SCALE" and
"VM_KMEM_SIZE_MAX" have been added to support better auto-sizing for systems
with greater than 128MB.

Add some accouting for vm_zone memory allocations, and provide properly
for vm_zone allocations out of the kmem_map.  Also move the vm_zone
allocation stats to the VM OID tree from the KERN OID tree.
1998-02-23 07:42:43 +00:00
Bruce Evans
168be6199e Quick fix for the i8254 timecounter often gaining 10 msec. 1998-02-23 00:11:25 +00:00
Jordan K. Hubbard
6bf2dcfc50 Add missing CLOCK_UNLOCK() before write_eflags().
Submitted by:	dave adkins <adkin003@tc.umn.edu>
1998-02-21 20:45:27 +00:00
Poul-Henning Kamp
7ec73f6417 Replace TOD clock code with more systematic approach.
Highlights:
    * Simple model for underlying hardware.
    * Hardware basis for timekeeping can be changed on the fly.
    * Only one hardware clock responsible for TOD keeping.
    * Provides a real nanotime() function.
    * Time granularity: .232E-18 seconds.
    * Frequency granularity:  .238E-12 s/s
    * Frequency adjustment is continuous in time.
    * Less overhead for frequency adjustment.
    * Improves xntpd performance.

Reviewed by:    bde, bde, bde
1998-02-20 16:36:17 +00:00
Bruce Evans
39e4376ba7 Removed unused #includes. 1998-02-20 13:11:54 +00:00
Mike Smith
42be88e88d Remove DISABLE_PSE option which was masking (but not fixing) the problem.
A correct fix for execution off MFS filesystems has been committed.
1998-02-16 23:57:03 +00:00
Mike Smith
354f83d34f TEMPORARILY disable support for the 4MB kernel page, as it appears to be
causing installation images for -current to be unbootable.

Submitted by:	phk
1998-02-16 00:29:05 +00:00
Bruce Evans
ee10b2a475 Removed a superstitious fnop() that broke the usefulness of the FPU's
"last instruction" pointer.
1998-02-15 06:25:26 +00:00
KATO Takenori
53a76bb7ed Use RDMSR instruction instead of WRMSR. 1998-02-13 09:34:42 +00:00
Bruce Evans
359888780e Ifdefed SMP-only declarations. 1998-02-13 06:59:22 +00:00
Bruce Evans
1d804e7925 Update timer0_prescaler_count before calling hardclock() while timer0
is "acquired".  This fixes a TSC biasing error of about 10 msec when
pcaudio is active.

Update `time' before calling hardclock() when timer0 is being released.
This is not known to be important.

Added some delays in writertc().  Efficiency is not critical here, unlike
in rtcin(), and we already use conservative delays there.

Don't touch the hardware when machdep.i8254_freq is being changed but
the maximum count wouldn't change.  This fixes jitter of up to 10 msec
for most small adjustments to machdep.i8254_freq.  When the maximum
count needs to change, the hardware should be adjusted more carefully.
1998-02-13 06:33:16 +00:00
Bruce Evans
9f449d2aa2 Ifdefed some npx code. npx should be optional again. 1998-02-13 05:30:18 +00:00
Bruce Evans
9729f279db Fixed missing privilege checking and off-by-1 bounds checking in
i386_set_ioperm().  Don't use a magic number for the bound.

Fixed missing bounds checking in i386_get_ioperm().  Don't use a
magic number for the bound elsewhere in this function.

Removed some bogus initializers.
1998-02-13 05:25:37 +00:00
Bruce Evans
045b6fefd8 Fixed initialization of the 4MB page. Kernels larger than about 2.75MB
(from _btext to _end) crashed in pmap_bootstrap().  Smaller kernels
worked accidentally.
1998-02-12 22:00:01 +00:00
Bruce Evans
cd59d49d07 Only use the i586-optimized copying and zeroing functions if they are
actually faster (more than 20% faster for zeroing 1 MB at boot time).
This fixes pessimized copying and zeroing on K6's and perhaps on other
CPUs that are misclassified as i586's.
1998-02-12 21:41:10 +00:00
Eivind Eklund
b265178126 Fix warning after previous staticization. 1998-02-10 17:30:26 +00:00
Eivind Eklund
303b270b0a Staticize. 1998-02-09 06:11:36 +00:00
Eivind Eklund
5589ae9dfd Remove warnings from f00f_hack. 1998-02-09 04:45:53 +00:00
Eivind Eklund
0b08f5f737 Back out DIAGNOSTIC changes. 1998-02-06 12:14:30 +00:00
John Dyson
95461b450d 1) Start using a cleaner and more consistant page allocator instead
of the various ad-hoc schemes.
2)	When bringing in UPAGES, the pmap code needs to do another vm_page_lookup.
3)	When appropriate, set the PG_A or PG_M bits a-priori to both avoid some
	processor errata, and to minimize redundant processor updating of page
	tables.
4)	Modify pmap_protect so that it can only remove permissions (as it
	originally supported.)  The additional capability is not needed.
5)	Streamline read-only to read-write page mappings.
6)	For pmap_copy_page, don't enable write mapping for source page.
7)	Correct and clean-up pmap_incore.
8)	Cluster initial kern_exec pagin.
9)	Removal of some minor lint from kern_malloc.
10)	Correct some ioopt code.
11)	Remove some dead code from the MI swapout routine.
12)	Correct vm_object_deallocate (to remove backing_object ref.)
13)	Fix dead object handling, that had problems under heavy memory load.
14)	Add minor vm_page_lookup improvements.
15)	Some pages are not in objects, and make sure that the vm_page.c can
	properly support such pages.
16)	Add some more page deficit handling.
17)	Some minor code readability improvements.
1998-02-05 03:32:49 +00:00
Eivind Eklund
47cfdb166d Turn DIAGNOSTIC into a new-style option. 1998-02-04 22:34:03 +00:00
Eivind Eklund
7dff14331f Make FAILSAFE a new-style option. 1998-02-04 03:47:16 +00:00
Bruce Evans
44429dc4f7 Converted DISABLE_PSE to a new-style option.
Fixed some formatting in options.i386.
1998-02-03 22:09:01 +00:00
Bruce Evans
a8961a8284 Ifdefed some SMP and VM86 code. Note that although VM86 is not a global
option, the ifdef on it in a header works because only the name of the
VM86 extension is hidden.
1998-02-03 21:27:50 +00:00
Bruce Evans
318ed3ed7a Forward declare a union so that this file is self-sufficient.
Cleaned up ifdefs.
1998-02-03 20:46:18 +00:00
Bruce Evans
7a1a679ecb Ifdefed use of a GNU feature. 1998-02-03 20:32:38 +00:00
Bruce Evans
af3b301b36 Fixed disordering of busdma* and swi_vm. 1998-02-01 23:00:53 +00:00
Bruce Evans
e29b867bd6 Fixed a recently broken comment. 1998-02-01 22:45:23 +00:00
Bruce Evans
76d0502a56 Declare printf() instead of including <stdio.h>, so that this doesn't
depend on anything outside of "sys".

Removed an unused include.

Don't use `extern' in a function declaration.
1998-02-01 18:53:09 +00:00
John Dyson
eaf13dd73a Change the busy page mgmt, so that when pages are freed, they
MUST be PG_BUSY.  It is bogus to free a page that isn't busy,
because it is in a state of being "unavailable" when being
freed.  The additional advantage is that the page_remove code
has a better cross-check that the page should be busy and
unavailable for other use.  There were some minor problems
with the collapse code, and this plugs those subtile "holes."

Also, the vfs_bio code wasn't checking correctly for PG_BUSY
pages.  I am going to develop a more consistant scheme for
grabbing pages, busy or otherwise.  For now, we are stuck
with the current morass.
1998-01-31 11:56:53 +00:00
Eivind Eklund
3f2076daf5 Make the debug options new-style.
This also zaps a DPT option from lint; it wasn't referenced from
anywhere.
1998-01-31 07:23:16 +00:00
Eivind Eklund
e0d781f3a5 Make POWERFAIL_NMI, PPS_SYNC and NATM new style options.
This also fixes a couple of defunct options; submitted by bde.
1998-01-31 05:00:21 +00:00
Eivind Eklund
828084926f Skip probing devices which have already probed true. 1998-01-31 03:29:00 +00:00
Eivind Eklund
5212dc9c0b Include "opt_nfs.h"
Pointed out by: Eric L. Hernes <erich@lodgenet.com>
1998-01-31 02:53:41 +00:00
Poul-Henning Kamp
c5b193bfba Retire LFS.
If you want to play with it, you can find the final version of the
code in the repository the tag LFS_RETIREMENT.

If somebody makes LFS work again, adding it back is certainly
desireable, but as it is now nobody seems to care much about it,
and it has suffered considerable bitrot since its somewhat haphazard
integration.

R.I.P
1998-01-30 11:34:06 +00:00
John Dyson
0621c31aaf Make the bounce buffer code a little more robust when space isn't
available.  If there isn't bounce space available, the bounce code
is disabled.  This will allow most large systems to run properly
when the bounce space is mistakenly allocated above 16MB.
1998-01-30 10:26:26 +00:00
Poul-Henning Kamp
53dd848c82 APM calls inittodr(0) which is stupid, but at least stop setting the
clock back to when Dennis had a good idea.
1998-01-28 10:41:33 +00:00
KATO Takenori
5be975adf0 Execute cpuid if BIOS disables cpuid instruction of Cyrix 6x86MX CPU. 1998-01-27 08:12:09 +00:00
KATO Takenori
e881afe741 Undo previous commit. The cpuid symbol has been already used by SMP
stuff.

Pointed-out by:	Manfred Antar <root@mantar.slip.netcom.com>
1998-01-25 23:45:41 +00:00
KATO Takenori
31e6b13443 Added cpuid instruction. 1998-01-25 17:02:00 +00:00
KATO Takenori
2f5a8c876a Execute cpuid if BIOS disables cpuid instruction of Cyrix 6x86MX CPU,
and store its result into cpu_id and cpu_feature variables.

Tested by:	Simon Coggins <chaos@ultra.net.au>
1998-01-25 17:01:31 +00:00
KATO Takenori
88a92ff10e Even though BIOS writer's guide recommends cpuid instruction of Cyrix
6x86MX CPU is enabled (BIOS should not disable it), some BIOS disables
it via CCR4.  In this case, cpu variable becomes CPU_486 and
identblue() is called.  Because Cyrix 6x86MX has MSR and doesn't have
MSR1002, wrmsr instruction generates general protection fault.

Tested by:	Simon Coggins <chaos@ultra.net.au>
1998-01-25 12:01:38 +00:00
Eivind Eklund
7b778b5e61 Make all file-system (MFS, FFS, NFS, LFS, DEVFS) related option new-style.
This introduce an xxxFS_BOOT for each of the rootable filesystems.
(Presently not required, but encouraged to allow a smooth move of option *FS
to opt_dontuse.h later.)

LFS is temporarily disabled, and will be re-enabled tomorrow.
1998-01-24 02:54:56 +00:00
John Dyson
50ce7ff499 Add better support for larger I/O clusters, including larger physical
I/O.  The support is not mature yet, and some of the underlying implementation
needs help.  However, support does exist for IDE devices now.
1998-01-24 02:01:46 +00:00
John Dyson
2d8acc0f4a VM level code cleanups.
1)	Start using TSM.
	Struct procs continue to point to upages structure, after being freed.
	Struct vmspace continues to point to pte object and kva space for kstack.
	u_map is now superfluous.
2)	vm_map's don't need to be reference counted.  They always exist either
	in the kernel or in a vmspace.  The vmspaces are managed by reference
	counts.
3)	Remove the "wired" vm_map nonsense.
4)	No need to keep a cache of kernel stack kva's.
5)	Get rid of strange looking ++var, and change to var++.
6)	Change more data structures to use our "zone" allocator.  Added
	struct proc, struct vmspace and struct vnode.  This saves a significant
	amount of kva space and physical memory.  Additionally, this enables
	TSM for the zone managed memory.
7)	Keep ioopt disabled for now.
8)	Remove the now bogus "single use" map concept.
9)	Use generation counts or id's for data structures residing in TSM, where
	it allows us to avoid unneeded restart overhead during traversals, where
	blocking might occur.
10)	Account better for memory deficits, so the pageout daemon will be able
	to make enough memory available (experimental.)
11)	Fix some vnode locking problems. (From Tor, I think.)
12)	Add a check in ufs_lookup, to avoid lots of unneeded calls to bcmp.
	(experimental.)
13)	Significantly shrink, cleanup, and make slightly faster the vm_fault.c
	code.  Use generation counts, get rid of unneded collpase operations,
	and clean up the cluster code.
14)	Make vm_zone more suitable for TSM.

This commit is partially as a result of discussions and contributions from
other people, including DG, Tor Egge, PHK, and probably others that I
have forgotten to attribute (so let me know, if I forgot.)

This is not the infamous, final cleanup of the vnode stuff, but a necessary
step.  Vnode mgmt should be correct, but things might still change, and
there is still some missing stuff (like ioopt, and physical backing of
non-merged cache files, debugging of layering concepts.)
1998-01-22 17:30:44 +00:00
Jordan K. Hubbard
ec4f65d24f Add entries for tx card. 1998-01-21 18:34:47 +00:00
Justin T. Gibbs
44be5ce870 Add prototypes for swi_vm, setsoftvm, schedsoftvm, and splsoftvm that were
missed when I originally committed the bus dma code.
1998-01-21 18:28:49 +00:00
John Birrell
013239afdf Suggested by: bde
Move sigjmp_buf and jmp_buf structure definitions to machine/setjmp.h
so that i386 can continue to use int as the basic register type and
alpha can use long. Bruce was concerned about possible differing
alignment. I've left the definition of _JBLEN in machine/setjmp.h
even though Bruce's example used the number directly. I don't know if
any other code relies on _JBLEN, so I left it to avoid potential
breakage.
1998-01-20 09:09:24 +00:00
Tor Egge
95f67de2e3 The removal of a page from the free queue in vm_page_zero_idle was
imcomplete. Also set m->queue, in order to prevent vm_page_select_free
from selecting the page being zeroed.
1998-01-19 04:16:16 +00:00
John Dyson
4722175765 Tie up some loose ends in vnode/object management. Remove an unneeded
config option in pmap.  Fix a problem with faulting in pages.  Clean-up
some loose ends in swap pager memory management.

The system should be much more stable, but all subtile bugs aren't fixed yet.
1998-01-17 09:17:02 +00:00
Paul Traina
aaf862068b Bring in IDE ATAPI floppy support.
This is Junichi's v1.0 driver.

NOTE: Major device numbers have been changed to avoid conflict with other
      FreeBSD 3.0 devices.  The new numbers should be considered "official."
      This driver is still considered "beta" quality, although we have been
      playing with it.  Please submit bugs to junichi and myself.

Submitted by:	junichi@astec.co.jp
1998-01-16 22:13:07 +00:00
Justin T. Gibbs
99117bb6ec Addition of splsoftvm and a VM SWI to handle bus dma related callbacks.
This SWI may be useful for other, defered, VM tasks.
1998-01-15 07:34:01 +00:00
Justin T. Gibbs
e1a1bba4fa Implementation of Bus Space for FreeBSD-x86.
Obtained From: NetBSD
1998-01-15 07:32:56 +00:00
Justin T. Gibbs
57d7d7b3be Implementation of Bus DMA for FreeBSD-x86. This is sufficient to do
page level bounce buffering, but there are still some issues left to
address.
1998-01-15 07:32:21 +00:00
John Dyson
43bdc1e901 Adjust upwards the size of exec map in order to take into account the
additional PAGE_SIZE needed for exec operatino.
1998-01-12 05:16:03 +00:00
Jordan K. Hubbard
efae35abc0 Add ppp, at long last, back to GENERIC. We have enough room in the
kernel for it and I'm tired of reading the "This system lacks kernel
support for PPP..." line in people's tech support messages.
1998-01-11 02:16:38 +00:00
John Birrell
a1db8c36a5 Add a machine dependent header for the i386 jmp_buf size instead of piling
machine dependent definitions into src/include/setjmp.h.
1998-01-10 23:04:51 +00:00
Eivind Eklund
e4f4247a08 Make the BOOTP family new-style options (in opt_bootp.h) 1998-01-09 03:21:07 +00:00
David E. O'Brien
aa5ce62c01 AMD calls the PR166 and PR200, models 2 and 3 respectively. 1998-01-03 05:43:37 +00:00
David E. O'Brien
7a124dd5b4 Update AMD URL for CPU recognition docs. 1998-01-03 05:36:40 +00:00
KATO Takenori
1ba2a54313 Fix typo. Option `CPU_SUSP_HLT' didn't work on Cyrix 486DX box.
Submitted by:	nyan@wyvern.cc.kogakuin.ac.jp (Takahashi Yoshihiro)
1998-01-03 05:35:51 +00:00
Mike Smith
d20358b3bd Don't try to call into BIOS32 handlers outside the normal ROM
address range.  They may have been trashed earlier in the boot
process, or the directory header may simply be bogus.

PR:		5140
Submitted by:	Joel Faedi <Joel.Faedi@esial.u-nancy.fr>
Brought-to-attention-by: Derek Inksetter <derek@saidev.com>, bde
1998-01-01 13:26:55 +00:00
Bruce Evans
82d86d3750 Moved the SMP declarations of INTREN() and INTRDIS() to the correct header,
i.e., the same header as corresponding non-SMP #defines.
1998-01-01 08:47:17 +00:00
Poul-Henning Kamp
0f12aa9ffd More cleanup relating to our use of the TSC.
Look in the cpu_feature (CPUID output) to see if we have it.
1997-12-28 17:33:10 +00:00
Poul-Henning Kamp
d46e059f94 wash, sort and put in order various nits from the i586_ctr -> tsc
commit.

Pointed out by: bde
1997-12-28 13:36:09 +00:00
Peter Wemm
388610239f Back out previous commit, the so-called "unused code" was most definately
used, and caused a reference to an uninitialised variable (state).
I think I've fixed it now, but since nothing in the tree seems to use it,
I'm not sure.
1997-12-27 03:00:59 +00:00
Peter Wemm
19d768b80b #include "opt_user_ldt.h" so that the #ifdef USER_LDT checks can work, as
commented about at length in the PR audit trail.

PR: 2412
1997-12-27 02:28:28 +00:00
Poul-Henning Kamp
71f461f86a Rename "i586_ctr" to "tsc" (both upper and lower case instances).
Fix a couple of printfs too.

Warning: This changes the names of a couple of kernel options!
1997-12-26 20:42:37 +00:00
John Dyson
841fc3681b Correct my previous fix for the UPAGES problem. 1997-12-22 10:06:09 +00:00
John Dyson
adbf9b6f86 Hopefully fix the problem with the TLB not being updated correctly.
Problem tracked down by bde@freebsd.org, but this is an attempted
efficient fix.
1997-12-22 00:36:48 +00:00
Stefan Eßer
8277ac255e Make the class code checks in function pci_cfgcheck less strict.
It failed to recognize the PCI bus in a system that had only an
old chip-set (class code 000000) and a Cyclom multiport serial
card on PCI bus 0, but no VGA card or disk or network controller.

PR:		i386/5300
Submitted by:	Nickolay N. Dudorov <nnd@itfs.nsk.su>
1997-12-20 09:04:25 +00:00
Tor Egge
5c623cb649 Add support for low resolution SMP kernel profiling.
- A nonprofiling version of s_lock (called s_lock_np) is used
    by mcount.

  - When profiling is active, more registers are clobbered in
    seemingly simple assembly routines. This means that some
    callers needed to save/restore extra registers.

  - The stack pointer must have space for a 'fake' return address
    in idle, to avoid stack underflow.
1997-12-15 02:18:35 +00:00
Tor Egge
549a42942d Don't forward hardclock or statclock to stopped cpus. Disable forwarding
when a panic has occured.
1997-12-15 01:14:10 +00:00
John Dyson
8256655132 After one of my analysis passes to evaluate methods for SMP TLB mgmt, I
noticed some major enhancements available for UP situations.  The number
of UP TLB flushes is decreased much more than significantly with these
changes.  Since a TLB flush appears to cost minimally approx 80 cycles,
this is a "nice" enhancement, equiv to eliminating between 40 and 160
instructions per TLB flush.

Changes include making sure that kernel threads all use the same PTD,
and eliminate unneeded PTD switches at context switch time.
1997-12-14 02:11:23 +00:00
Tor Egge
80db913bd6 Add needed #include.
Problem found by: Bruce Evans <bde@zeta.org.au>
1997-12-12 21:45:23 +00:00