Commit Graph

894 Commits

Author SHA1 Message Date
julian
65b6e7181b Collect all the functioons concerned with rebooting into one place
also add the at_shutdown callout list, and change the one user of
the present (broken) method (the vn driver) to use the new scheme.
1996-08-19 20:07:07 +00:00
wollman
084c9a9ee6 Back out mistaken local change that sneaked in on the last commit. 1996-08-12 20:03:16 +00:00
wollman
9782a04d1c Don't declare the user_ldt functions unless USER_LDT is defined.
Eliminates an obnoxious warning.
1996-08-12 19:57:10 +00:00
dg
90489078d4 Add support for i686 machine check trap. 1996-08-11 17:41:25 +00:00
dg
68af419b0b Defined T_MCHK exception for i686; renumbered T_RESERVED to 29. 1996-08-11 17:29:39 +00:00
peter
501343eb76 Add recognition for the AMD 5x86 CPU models.
Submitted by: A JOSEPH KOSHY <koshy@india.hp.com>
1996-08-10 08:04:24 +00:00
peter
d6987f0ce1 Trivial cosmetic tweak to make the i[56]86 CPU MHz reprting round to the
nearest .01 Mhz rather than simply truncating it downwards.

This hack makes this 89.999928 Mhz clock correctly round to the closer
90.00-MHz rather than 89.99-MHz:
  > i586 clock: 89999928 Hz, i8254 clock: 1193152 Hz
  > CPU: Pentium (90.00-MHz 586-class CPU)
1996-08-10 06:35:35 +00:00
bde
6a63ec68e3 Eliminated i586_ctr_rate. Use i586_ctr_freq instead. 1996-08-02 21:16:27 +00:00
bde
1cfe857c9e Eliminated i586_ctr_rate. Use i586_ctr_freq instead.
Changed i586_ctr_bias from long long to u_int.  Only the low 32 bits
are used now that microtime uses a multiplication to do the scaling.
Previously the high 32 bits had to match those of rdtsc() to prevent
overflow traps and invalid timeval adjustments.
1996-08-02 21:16:13 +00:00
wollman
6480d29561 Add an fls() inline function which does the opposite operation to
ffs().  (That is to say, it searches in the opposite direction.)
1996-08-01 20:29:28 +00:00
bde
09d9898dd8 Eliminated pcb_inl. It was always 0 because context switches don't occur
in interrupt handlers.
1996-07-31 12:36:11 +00:00
dg
d0fa775b6a Converted timer/run queues to 4.4BSD queue style. Removed old and unused
sleep(). Implemented wakeup_one() which may be used in the future to combat
the "thundering herd" problem for some special cases.

Reviewed by:	dyson
1996-07-31 09:26:54 +00:00
bde
7aa24eec62 Fixed longstanding bug of not checking dumpdev' or setting dumplo'
early enough when the dump device is specified in the config file.

Removed stale comment about configuration root and swap devices.

Don't bother clearing dumplo when dumpdev is set to NODEV.  Everything
is controlled by dumpdev.

Fixed the kern.dumpdev sysctl.  Writes were handle bogusly.
1996-07-30 20:30:49 +00:00
bde
008531d599 Fixed the machdep.i8254_freq and machdep.i586_freq sysctls. Writes were
handled bogusly.

Centralized the setting of all the frequency variables.  Set these
variables atomically.  Some new ones aren't used yet.
1996-07-30 19:26:55 +00:00
dyson
01ce9d323a Backed out the recent changes/enhancements to the VM code. The
problem with the 'shell scripts' was found, but there was a 'strange'
problem found with a 486 laptop that we could not find.  This commit
backs the code back to 25-jul, and will be re-entered after the snapshot
in smaller (more easily tested) chunks.
1996-07-30 03:08:57 +00:00
dyson
d5ddac354d Fix a problem with a DEBUG section of code. 1996-07-29 14:22:46 +00:00
dyson
b5b2209430 Fix an error in statement order in pmap_remove_pages, remove the pmap
pte hint (for now), and general code cleanup.
1996-07-29 03:08:51 +00:00
dyson
a0fe245605 Fix a problem that pmap update was not being done for kernel_pmap. Also
remove some (currently) gratuitious tests for PG_V...  This bug could
have caused various anomolous (temporary) behavior.
1996-07-28 20:31:27 +00:00
dyson
293abd3564 This commit is meant to solve a couple of VM system problems or
performance issues.

	1) The pmap module has had too many inlines, and so the
	   object file is simply bigger than it needs to be.
	   Some common code is also merged into subroutines.
	2) Removal of some *evil* PHYS_TO_VM_PAGE macro calls.
	   Unfortunately, a few have needed to be added also.
	   The removal caused the need for more vm_page_lookups.
	   I added lookup hints to minimize the need for the
	   page table lookup operations.
	3) Removal of some bogus performance improvements, that
	   mostly made the code more complex (tracking individual
	   page table page updates unnecessarily).  Those improvements
	   actually hurt 386 processors perf (not that people who
	   worry about perf use 386 processors anymore :-)).
	4) Changed pv queue manipulations/structures to be TAILQ's.
	5) The pv queue code has had some performance problems since
	   day one.  Some significant scalability issues are resolved
	   by threading the pv entries from the pmap AND the physical
	   address instead of just the physical address.  This makes
	   certain pmap operations run much faster.  This does
	   not affect most micro-benchmarks, but should help loaded system
	   performance *significantly*.  DG helped and came up with most
	   of the solution for this one.
	6) Most if not all pmap bit operations follow the pattern:
		pmap_test_bit();
		pmap_clear_bit();
	   That made for twice the necessary pv list traversal.   The
	   pmap interface now supports only pmap_tc_bit type operations:
	   pmap_[test/clear]_modified, pmap_[test/clear]_referenced.
	   Additionally, the modified routine now takes a vm_page_t arg
	   instead of a phys address.  This eliminates a PHYS_TO_VM_PAGE
	   operation.
	7) Several rewrites of routines that contain redundant code to
	   use common routines, so that there is a greater likelihood of
	   keeping the cache footprint smaller.
1996-07-27 03:24:10 +00:00
asami
80d0633189 Update to current state of PC98 world.
Submitted by:	The FreeBSD(98) development team
1996-07-23 07:46:59 +00:00
joerg
cc3250aa71 Post-commit review by Bruce. Mostly stylistic changes.
Submitted by:	bde
1996-07-21 08:20:51 +00:00
joerg
05dd496ff2 Major cleanup of the timerX_{acquire,release} stuff. In particular,
make it more intelligible, improve the partially bogus locking, and
allow for a ``quick re-acquiration'' from a pending release of timer 0
that happened ``recently'', so it was not processed yet by clkintr().
This latter modification now finally allows to play XBoing over
pcaudio without losing sounds or getting complaints. ;-)  (XBoing
opens/writes/closes the sound device all over the day.)

Correct locking for sysbeep().

Extensively (:-) reviewed by:	bde
1996-07-20 18:47:23 +00:00
bde
d2dedce665 Fixed adjustment of `time' when timer0 is released. 27465 was 27645 in
a comment and in code that was only used when pcaudio was closed.  The
maximum error was 66 usec.
1996-07-17 11:26:05 +00:00
nate
96a70c6e84 Moved declaration of zbuf outside of #ifdef DEVFS code. 1996-07-15 18:22:07 +00:00
bde
7af02d30b3 Quick fix for previous commit: don't free zbuf on close since it may be
in use in another process that blocked in uiomove().
1996-07-15 05:23:04 +00:00
dyson
f8e0a40f1c Almost gratuitious improvement of the performance of reading
/dev/zero.
1996-07-14 06:05:53 +00:00
bde
c2df7dfe25 Removed "optimization" using gcc's builtin memcpy instead of bcopy.
There is little difference now since the amount copied is large,
and bcopy will become much faster on some machines.
1996-07-12 07:18:12 +00:00
bde
df4f981939 Renamed upa to p0upa to match p0upt.
Cleaned up some comments.
1996-07-12 06:48:55 +00:00
bde
294358211b Export `dumpmag' to utilities but not to the kernel.
Restored a truncated comment.
1996-07-12 06:09:49 +00:00
bde
410e1d2c55 Fixed cloned comments about npx traps to match context. 1996-07-12 06:03:14 +00:00
bde
e75f9a15ea Fixed operand order for shld and shrd.
Finished the constant poisoning that was begun in rev.1.14.  Consts
aren't very poisonous (or useful) unless -Wcast-qual is in CFLAGS,
and it isn't in the default CFLAGS.
1996-07-12 04:40:21 +00:00
bde
4c9b9ce103 Don't use NULL in non-pointer contexts. 1996-07-12 04:12:25 +00:00
jkh
3c83c32022 Merge. 1996-07-11 11:18:45 +00:00
jkh
89712746cb Clean out some historical cruft. 1996-07-10 03:35:59 +00:00
wollman
f94ea926ed Fix something that's been bugging me for a long time: move the CPU
type identification code out of machdep.c and into a new file of its
own.  Hopefully other grot can be moved out of machdep.c as well
(by other people) into more descriptively-named files.
1996-07-08 19:44:39 +00:00
bde
325165ab60 Fixed lots of warnings about unportable casts of pointers to volatile
variables: don't depend on the compiler generating atomic code to set
the variables - use inline asm to specify the atomic instruction(s)
explicitly.
1996-07-01 20:16:10 +00:00
bde
9f2f4504f0 Moved declarations of non-cpu things from <machine/cpufunc.h> to better
places.
1996-07-01 18:12:24 +00:00
bde
35ba85a4fd Use the standard timer (interrupt) frequency while calibrating the clocks.
Testing with the high frequency of 20000 Hz (to find problems) only found
the problem that this frequency is too high for slow i386's.

Disable interrupts while setting the timer frequency.  This was unnecessary
before rev.1.57 and forgotten in rev.1.57.  The critical (i8254) interrupts
are disabled in another way at boot time but not in the sysctl to change
the frequency.
1996-07-01 18:00:47 +00:00
joerg
17f10d8a38 Enable ktrace by default, accompanied by a small reminder about the
implications (4 KB bloat, slight slowdown of syscalls).

Reviewed by:	freebsd-hackers
1996-06-30 09:39:29 +00:00
dyson
ff984cd1a5 When page table pages were removed from process address space, the
resident page stats were not being decremented.  This mode corrects
that problem.
1996-06-26 05:05:52 +00:00
bde
a89f142f6f Added #include of <machine/md_var.h>. This will be needed when
some declarations are moved from <machine/cpufunc.h> to better
places.
1996-06-25 20:31:01 +00:00
bde
b78ec1326f trap.c:
Fixed profiling of system times.  It was pre-4.4Lite and didn't support
statclocks.  System times were too small by a factor of 8.

Handle deferred profiling ticks the 4.4Lite way: use addupc_task() instead
of addupc().  Call addupc_task() directly instead of using the ADDUPC()
macro.

Removed vestigial support for PROFTIMER.

switch.s:
Removed addupc().

resourcevar.h:
Removed ADDUPC() and declarations of addupc().

cpu.h:
Updated a comment.  i386's never were tahoe's, and the deferred profiling
tick became (possibly) multiple ticks in 4.4Lite.

Obtained from:	mostly from NetBSD
1996-06-25 20:02:16 +00:00
bde
3d80cb8e5e Save John Polstra's initial fix for profiling for reference. The
multiplication in addupc() overflowed for addresses >= 256K, assuming
the usual profil(2) scale parameter of 0x8000.  addupc() will go away
soon.

Submitted by:	John Polstra <jdp@polstra.com>
1996-06-25 19:25:25 +00:00
dyson
63f9541399 Limit the scan for preloading pte's to the end of an object. 1996-06-25 00:39:21 +00:00
dg
10c0c08c64 Properly account for non-page aligned buffers. 1996-06-20 08:07:30 +00:00
dg
ecc3ffe7bb Minor KNF formatting change to vmapbuf() and vunmapbuf(). 1996-06-20 01:47:21 +00:00
dyson
318ee3519d Clean up vmapbuf and vunmapbuf significantly. The previous code was
very rough.
1996-06-19 03:39:24 +00:00
bde
097df5e884 Removed unused #includes of <i386/isa/icu.h> and <i386/isa/icu.h>. icu.h
is only used by the icu support modules and by a few drivers that know
too much about the icu (most only use it to convert `n' to `IRQn').  isa.h
is only used by ioconf.c and by a few drivers that know too much about
isa addresses (a few have to, because config is deficient).
1996-06-18 01:22:40 +00:00
bde
ab552bbee7 In getit(), use read_eflags()/write_eflags() to preserve the interrupt
enable flag instead of enable_intr() to restore it to its usual state.
getit() is only called from DELAY() so there is no point in optimising
its speed (this wasn't so clear when it was extern), and using
enable_intr() made it inconvenient to call DELAY() from probes that need
to run with interrupts disabled.
1996-06-17 12:50:22 +00:00
dyson
5cd11c9038 Several bugfixes/improvements:
1) Make it much less likely to miss a wakeup in vm_page_free_wakeup
	2) Create a new entry point into pmap: pmap_ts_referenced, eliminates
	   the need to scan the pv lists twice in many cases.  Perhaps there
	   is alot more to do here to work on minimizing pv list manipulation
	3) Minor improvements to vm_pageout including the use of pmap_ts_ref.
	4) Major changes and code improvement to pmap.  This code has had
	   several serious bugs in page table page manipulation.  In order
	   to simplify the problem, and hopefully solve it for once and all,
	   page table pages are no longer "managed" with the pv list stuff.
	   Page table pages are only (mapped and held/wired) or
	   (free and unused) now.  Page table pages are never inactive,
	   active or cached.  These changes have probably fixed the
	   hold count problems, but if they haven't, then the code is
	   simpler anyway for future bugfixing.
	5) The pmap code has been sorely in need of re-organization, and I
	   have taken a first (of probably many) steps.  Please tell me
	   if you have any ideas.
1996-06-17 03:35:40 +00:00