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Commit Graph

1100 Commits

Author SHA1 Message Date
Julian Elischer
d13d3630fd Further improved version of hadling a HALT when there is no console. 1996-10-31 00:57:28 +00:00
Satoshi Asami
e30f001135 More merge and update.
(1) deleted #if 0

    pc98/pc98/mse.c

(2) hold per-unit I/O ports in ed_softc

    pc98/pc98/if_ed.c
    pc98/pc98/if_ed98.h

(3) merge more files by segregating changes into headers.

  new file (moved from pc98/pc98):

    i386/isa/aic_98.h

  deleted:

    well, it's already in the commit message so I won't repeat the
    long list here ;)

Submitted by:	The FreeBSD(98) Development Team
1996-10-30 22:41:46 +00:00
Justin T. Gibbs
1affda38c1 Add two new aic7xxx driver options:
AHC_FORCE_PIO - This forces the driver to use PIO even on systems that
	say they have memory mapped the controller's registers.  This
	seems to fix Ken Lam's problems.  I've also placed this option
	in the GENERIC kernel file so that we are guaranteed to install
	even on these flakey machines.

AHC_SHARE_SCBS - This option attempts to share the external SCB SRAM on
	the 398X controllers allowing a totoll of 255 non-paged SCBs.
	This doesn't work quite yet, so this option is mostly here to
	help 398X owners to experiment and give me feedback until this
	works properly.
1996-10-28 06:05:58 +00:00
Bruce Evans
9272350657 Removed initialization of a variable that went away. Oops. 1996-10-26 00:11:57 +00:00
Bruce Evans
2d872b777d Print the clock calibration messages all on one (long) line again so
that they are easy to grep for.

Removed now-unused i586 counter variables.

Fixed some style bugs.
1996-10-25 13:46:21 +00:00
Bruce Evans
835bd1ce62 Improved biasing of i586 clock by adjusting for hardclock() latency.
I decided to do this for every hardclock() call instead of lazily
in microtime().  The lazy method is simpler but has more overhead
if microtime() is called a lot.

CPU_THISTICKLEN() is now a no-op and should probably go away.
Previously it did nothing directly but had the side effect of
setting i586_last_tick for CPU_CLOCKUPDATE() and i586_avg_tick for
debugging.  CPU_CLOCKUPDATE() now uses a better method and
i586_avg_tick is too much trouble to maintain.

Reduced nesting of #includes in the usual case.

Increased nesting of #includes when CLOCK_HAIR is defined.  This
is a kludge to get typedefs for inline functions only when the
inline functions are used.  Normally only kern_clock.c defines
this.  kern_clock.c can't include the i386 headers directly.

Removed unused LOCORE support.
1996-10-25 13:01:56 +00:00
John Dyson
845c4ec464 Account for the UPAGES in the same way as before moving the MD code
from vm_glue into pmap.c.  Now RSS should appear to be the same as before.
1996-10-23 05:31:54 +00:00
Poul-Henning Kamp
bd7ea4dcfc Removing old isdn stuff. 1996-10-20 18:35:35 +00:00
Bruce Evans
d6b9e17eb5 Improved non-statistical (GUPROF) profiling:
- use a more accurate and more efficient method of compensating for
  overheads.  The old method counted too much time against leaf
  functions.
- normally use the Pentium timestamp counter if available.
  On Pentiums, the times are now accurate to within a couple of cpu
  clock cycles per function call in the (unlikely) event that there
  are no cache misses in or caused by the profiling code.
- optionally use an arbitrary Pentium event counter if available.
- optionally regress to using the i8254 counter.
- scaled the i8254 counter by a factor of 128.  Now the i8254 counters
  overflow slightly faster than the TSC counters for a 150MHz Pentium :-)
  (after about 16 seconds).  This is to avoid fractional overheads.

files.i386:
permon.c temporarily has to be classified as a profiling-routine
because a couple of functions in it may be called from profiling code.

options.i386:
- I586_CTR_GUPROF is currently unused (oops).
- I586_PMC_GUPROF should be something like 0x70000 to enable (but not
  use unless prof_machdep.c is changed) support for Pentium event
  counters.  7 is a control mode and the counter number 0 is somewhere
  in the 0000 bits (see perfmon.h for the encoding).

profile.h:
- added declarations.
- cleaned up separation of user mode declarations.

prof_machdep.c:
Mostly clock-select changes.  The default clock can be changed by
editing kmem.  There should be a sysctl for this.

subr_prof.c:
- added copyright.
- calibrate overheads for the new method.
- documented new method.
- fixed races and and machine dependencies in start/stop code.

mcount.c:
Use the new overhead compensation method.

gmon.h:
- changed GPROF4 counter type from unsigned to int.  Oops, this should
  be machine-dependent and/or int32_t.
- reorganized overhead counters.

Submitted by:	Pentium event counter changes mostly by wollman
1996-10-17 19:32:31 +00:00
Bruce Evans
b40a35f250 Added missing extern declaration of timer_freq.
Sorted declarations of scalars.
1996-10-17 17:31:25 +00:00
Bruce Evans
ebd707d36a Fixed miscounting for non-statistical (GUPROF) profiling:
- use CROSSJUMP() and CROSSJUMP_LABEL() for conditional jumps from idle()
  into cpu_switch() and vice versa.
- moved badsw code to after cpu_switch().

Cosmetic changes:
- moved sw0 string to be immediately after its caller (badsw).
- removed unused #include.
1996-10-16 18:37:58 +00:00
Bruce Evans
435929a84b Added macros CROSSJUMP(), CROSSJUMP_LABEL() and GPROF_RET. These will
be used to fix some benign(?) bugs in GUPROF profiling.

Fixed stale comments and long lines.
1996-10-16 18:13:25 +00:00
John Dyson
675878e732 Move much of the machine dependent code from vm_glue.c into
pmap.c.  Along with the improved organization, small proc fork
performance is now about 5%-10% faster.
1996-10-15 03:16:45 +00:00
John Dyson
8de30f117f Pmap_resident_count was mistakenly removed from pmap.h, thereby
disabling the RSS listing in ps and ^T.  This commit re-inserts
the macro defn.
1996-10-13 03:14:57 +00:00
John Dyson
8f3a9a1b78 Minor optimization for final rundown of a pmap. 1996-10-13 01:38:37 +00:00
John Dyson
9d3fbbb5f4 Performance optimizations. One of which was meant to go in before the
previous snap.  Specifically, kern_exit and kern_exec now makes a
call into the pmap module to do a very fast removal of pages from the
address space.  Additionally, the pmap module now updates the PG_MAPPED
and PG_WRITABLE flags.  This is an optional optimization, but helpful
on the X86.
1996-10-12 21:35:25 +00:00
Bruce Evans
da2186afa3 Cleaned up:
- fixed a sloppy common-style declaration.
- removed an unused macro.
- moved once-used macros to the one file where they are used.
- removed unused forward struct declarations.
- removed __pure.
- declared inline functions as inline in their prototype as well
  as in theire definition (gcc unfortunately allows the prototype
  to be inconsistent).
- staticized.
1996-10-12 20:36:15 +00:00
Bruce Evans
4458ac71b1 Removed nested include if <sys/socket.h> from <net/if.h> and
<net/if_arp.h> and fixed the things that depended on it.  The nested
include just allowed unportable programs to compile and made my
simple #include checking program report that networking code doesn't
need to include <sys/socket.h>.
1996-10-12 19:49:43 +00:00
Bruce Evans
a0ea75ecbd Don't include "opt_cpu.h" in <machine/clock.h>, since this breaks lkm's.
The change breaks kern_clock.c; fix that temporarily by including
"opt_cpu.h" there.
1996-10-10 10:25:26 +00:00
Bruce Evans
c20b324bb6 Put I*86_CPU defines in opt_cpu.h. 1996-10-09 19:47:44 +00:00
Bruce Evans
cf232f113f Enable the i586-optimized bcopy if the cpu is a "586" and option
I586_OPTIMIZED_BCOPY is configured.

Similarly for bzero/I586_OPTIMIZED_BZERO.

Fake 586's had better have a hardware FPU with non-broken exception
handling (we mask exceptions, but broken exception handling may trap
on the instructions that do the masking).  I guess this means that
the routines won't work on most 386's or FPUless 486's even when they
have a h/w FPU.
1996-10-09 18:30:08 +00:00
Bruce Evans
18860b410d Added i586-optimized bcopy() and bzero().
These are based on using the FPU to do 64-bit stores.  They also
use i586-optimized instruction ordering, i586-optimized cache
management and a couple of other tricks.  They should work on any
i*86 with a h/w FPU, but are slower on at least i386's and i486's.
They come close to saturating the memory bus on i586's.  bzero()
can maintain a 3-3-3-3 burst cycle to 66 MHz non-EDO main memory
on a P133 (but is too slow to keep up with a 2-2-2-2 burst cycle
for EDO - someone with EDO should fix this).  bcopy() is several
cycles short of keeping up with a 3-3-3-3 cycle for writing.  For
a P133 writing to 66 MHz main memory, it just manages an N-3-3-3,
3-3-3-3 pair of burst cycles, where N is typically 6.

The new routines are not used by default.  They are always configured
and can be enabled at runtime using a debugger or an lkm to change
their function pointer, or at compile time using new options (see
another log message).

Removed old, dead i586_bzero() and i686_bzero().  Read-before-write is
usually bad for i586's.  It doubles the memory traffic unless the data
is already cached, and data is (or should be) very rarely cached for
large bzero()s (the system should prefer uncached pages for cleaning),
and the amount of data handled by small bzero()s is relatively small
in the kernel.

Improved comments about overlapping copies.

Removed unused #include.
1996-10-09 18:16:17 +00:00
Bruce Evans
e8e87818d1 Fixed pessimized (short) i/o port types. 1996-10-08 21:08:18 +00:00
Jordan K. Hubbard
d50a30076c Multiple changes stacked as one commit since they all depend on one another.
First, change sysinstall and the Makefile rules to not build the kernel
nlist directly into sysinstall now.  Instead, spit it out as an ascii
file in /stand and parse it from sysinstall later.  This solves the chicken-n-
egg problem of building sysinstall into the fsimage before BOOTMFS is built
and can have its symbols extracted.  Now we generate the symbol file in
release.8.

Second, add Poul-Henning's USERCONFIG_BOOT changes.  These have two
effects:

	1. Userconfig is always entered, rather than only after a -c
	   (don't scream yet, it's not as bad as it sounds).

	2. Userconfig reads a message string which can optionally be
	   written just past the boot blocks.  This string "preloads"
	   the userconfig input buffer and is parsed as user input.
	   If the first command is not "USERCONFIG", userconfig will
	   treat this as an implied "quit" (which is why you don't need
	   to scream - you never even know you went through userconfig
	   and back out again if you don't specifically ask for it),
	   otherwise it will read and execute the following commands
	   until a "quit" is seen or the end is reached, in which case
	   the normal userconfig command prompt will then be presented.

  How to create your own startup sequences, using any boot.flp image
from the next snap forward (not yet, but soon):

	% dd of=/dev/rfd0 seek=1 bs=512 count=1 conv=sync <<WAKKA_WAKKA_DOO
USERCONFIG
irq ed0 10
iomem ed0 0xcc000
disable ed1
quit
WAKKA_WAKKA_DOO


Third, add an intro screen to UserConfig so that users aren't just thrown
into this strange screen if userconfig is auto-launched.  The default
boot.flp startup sequence is now, in fact, this:

	USERCONFIG
	intro
	visual

(Since visual never returns, we don't need a following "quit").

Submitted-By: phk & jkh
1996-10-05 10:44:07 +00:00
Bruce Evans
ece15d78ea Added "memory" to clobber list in invlpg(). It needs it if invltlb()
needs it.

Fixed style in invlpg().

Sorted recently renamed functions.

Added prototypes in the non-gcc section for recently added/renamed
functions.
1996-09-29 18:35:07 +00:00
John Dyson
27e9b35e07 Essentially rename pmap_update to be invltlb. It is a very machine
dependent operation, and not really a correct name.  invltlb and invlpg
are more descriptive, and in the case of invlpg, a real opcode.

Additionally, fix the tlb management code for 386 machines.
1996-09-28 22:37:57 +00:00
Bruce Evans
f53687f7b5 Restored my change in rev.1.119 which was clobbered by the previous commit. 1996-09-28 15:28:40 +00:00
John Dyson
9299d3c4bb Move pmap_update_1pg to cpufunc.h. Additionally,
use the invlpg opcode instead of the nasty looking .byte directives.
There are some other minor micro-level code improvements to pmap.c
1996-09-28 04:22:46 +00:00
Peter Wemm
32d8f04c11 part 2 of the bsdi compat tweak attempt. I believe that BSDI use both
lcall 7,0 (ie: ldt slot 0) and lcall 0x87,0 (ldt slot 16, it's shifted
three bits to the left).  I was fiddling with this so long ago, I don't
recall the specifics.
1996-09-27 13:38:02 +00:00
Peter Wemm
90af01bef3 Apparently, BSDI have a new system call gate. I was experimenting
with this quite a while ago when somebody reported a BSD/OS 2.1 binary
that wouldn't run.  I'm pretty sure they tried it and I'm pretty sure
they mentioned to me that the patch worked.
1996-09-27 13:33:49 +00:00
Peter Wemm
983febf3dc I've been meaning to commit this for months. Implement select()
for /dev/random and /dev/urandom.  Both are always writable, urandom is
always readable, and /dev/random is readable when >= 8 bits are in the
pool.
1996-09-27 13:25:13 +00:00
Bruce Evans
388dfa7112 Fixed a few hundred warnings (2400 in LINT) for signed vs unsigned
comparisons in the inb() and outb() macros.  I decided that int args
are OK here.  Any type that can hold a u_int16_t without overflow
is correct, and 32-bit types are optimal.

Introduced a few tens of warnings (100 in LINT) for use of pessimized
(short) types for the port arg.  Only a few drivers are affected by
this.  u_short pessimizations aren't detected.

Added `__extension__' before the statement-expression in inb() so
that it can be compiled without warnings by gcc -pedantic.
1996-09-24 17:47:59 +00:00
Bruce Evans
ec55e44ec8 Changed an arg name in the pseudo-prototype for bzero() to match
the prototype.

Put the jump table for i486_bzero() in the data section.  This
speeds up i486_bzero() a little on Pentiums without significantly
affecting its speed on 486's.

Don't waste time falling through 14 nop's to return from do1 in
i486_bzero().

Use fastmove() for counts >= 1024 (was > 1024).  Cosmetic.

Fixed profiling of fastmove().

Restored meaningful labels from the pre-1.1 version in fastmove().
Local labels are evil.

Fixed (high resolution non-) profiling of __bb_init_func().
1996-09-20 16:52:09 +00:00
Poul-Henning Kamp
e8993539b8 Add APM_IDLE_CPU option, that is off by default.
I maintain that it saves more power to simply "hlt" the CPU than to
spend tons of time trying to tell the APM bios to do the same.
In particular if you do it 100 times a second...
1996-09-19 08:28:16 +00:00
Bruce Evans
831031ce00 Attached simple external ddb commands show rtc', show pgrpdump'
and `show cbstat'.  The pgrpdump code was previously controlled by
`#ifdef DEBUG'.
1996-09-14 10:53:48 +00:00
Bruce Evans
daed6ffd24 Changed cncheckc() interface so that it is 8-bit clean - return -1
instead of 0 if there is no input.

syscons.c:
Added missing spl locking in sccncheckc().  Return the same value as
sccngetc() would.  It is wrong for sccngetc() to return non-ASCII, but
stripping the non-ASCII bits doesn't help.
1996-09-14 04:27:46 +00:00
Bruce Evans
c254b6e8db Made debugging code (pmap_pvdump()) compile again so that I can test LINT.
I don't know if it actually works.
1996-09-13 07:10:00 +00:00
Satoshi Asami
0e408c25a1 Another round of merge/update.
(1) Add PC98 support to apm_bios.h and ns16550.h, remove pc98/pc98/ic
(2) Move PC98 specific code out of cpufunc.h (to pc98.h)
(3) Let the boot subtrees look more alike

Submitted by:	The FreeBSD(98) Development Team
		<freebsd98-hackers@jp.freebsd.org>
1996-09-12 11:12:18 +00:00
John Dyson
dba940b46e Primarily a fix so that pages are properly tracked for being
modified.  Pages that are removed by the pageout daemon were
the worst affected.  Additionally, numerous minor cleanups,
including better handling of busy page table pages.  This
commit fixes the worst of the pmap problems recently introduced.
1996-09-12 04:54:55 +00:00
Poul-Henning Kamp
96fc6efbe3 Make userconfig two (default: on) options:
USERCONFIG to enable
	VISUAL_USERCONFIG to get the gui stuff too.
Requested by: pst
1996-09-11 19:53:45 +00:00
John Dyson
690db31d04 A minor fix to the new pmap code. This might not fix the global problems
with the last major pmap commits.
1996-09-11 03:46:41 +00:00
Bruce Evans
b568ea4e01 Removed more devconf leftovers. 1996-09-10 23:31:13 +00:00
Bruce Evans
dad0de774e Removed bogus LARGMEM code and option. The code paniced when
biosextmem > 65536, but biosextmem is a 16-bit quantity so it is
guaranteed to be < 65536.  Related cruft for biosbasemem was
mostly cleaned up in rev.1.26.
1996-09-10 23:07:04 +00:00
Bruce Evans
f313170d3c Updated #includes to 4.4Lite style. 1996-09-10 08:32:01 +00:00
John Dyson
5070c7f8c5 Addition of page coloring support. Various levels of coloring are afforded.
The default level works with minimal overhead, but one can also enable
full, efficient use of a 512K cache.  (Parameters can be generated
to support arbitrary cache sizes also.)
1996-09-08 20:44:49 +00:00
John Dyson
b8e251a56d Improve the scalability of certain pmap operations. 1996-09-08 16:57:53 +00:00
Satoshi Asami
c9da8434ea Yet another merge. Remove support.s by deleting memcopy. Remove
autoconf.c by merging icu.h.  Fix a couple of typos.

Submitted by:	The FreeBSD(98) Development Team.
1996-09-07 02:14:47 +00:00
Poul-Henning Kamp
bfbb029d87 Remove devconf, it never grew up to be of any use. 1996-09-06 23:09:20 +00:00
Nate Williams
a390940e3f Cleaned up version of my 'extended BIOS' patch. This one is commented
better and much simpler to understand, and works just as well (better)
as a bonus.

Submitted by:	bde
1996-09-03 18:50:36 +00:00
David Greenman
eaed89032e Change an splclock that needs to be an splhigh into an splhigh.
Reviewed by:	bde
1996-09-01 10:10:12 +00:00
Nate Williams
e3bc07db0d If the basemem value supplied by the bootblocks, differs from the value
returned by the RTC, use the bootblock supplied value.  Also, map the
'stolen by BIOS' memory in the same manner as the ISA-hole memory, since
it is really an extenstion of the BIOS.  This is necessary for 32-bit
BIOS functions such as APM support on laptops, and the loss of memory
for non-necessary functions seems to be at most 4k.

Reviewed by:	phk
Obtained from:  email conversation with jtk@atria.com
1996-09-01 02:16:07 +00:00
Paul Traina
e1889269a7 Improvements from Bruce Evans 1996-08-30 17:03:46 +00:00
Bruce Evans
1f403fcfbf Cleaned up interrupt masking by declaring the state variable in a
machine-dependent macro and passing it to all machine-dependent
macros.

Eliminated the state variable for the GUPROF case.
1996-08-28 20:15:32 +00:00
Paul Traina
d42c2de85c Clean up formatting and fix an & -> && bug pointed out by bde 1996-08-28 17:49:33 +00:00
Paul Traina
f8f0b4798e Support for GDB remote debug protocol.
Sponsored by: Juniper Networks, Inc. <pst@jnx.com>
1996-08-27 19:45:58 +00:00
Wolfram Schneider
8830dd31e3 Add hints to the file ./LINT and the handbook. 1996-08-27 16:25:53 +00:00
Julian Elischer
269fb9d764 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
Garrett Wollman
9f0a4b33d9 Back out mistaken local change that sneaked in on the last commit. 1996-08-12 20:03:16 +00:00
Garrett Wollman
0b5b0f16a9 Don't declare the user_ldt functions unless USER_LDT is defined.
Eliminates an obnoxious warning.
1996-08-12 19:57:10 +00:00
David Greenman
11282a57ce Add support for i686 machine check trap. 1996-08-11 17:41:25 +00:00
David Greenman
150022d8fc Defined T_MCHK exception for i686; renumbered T_RESERVED to 29. 1996-08-11 17:29:39 +00:00
Peter Wemm
7c34c352e3 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 Wemm
b05a2d987d 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
Bruce Evans
70e53371c4 Eliminated i586_ctr_rate. Use i586_ctr_freq instead. 1996-08-02 21:16:27 +00:00
Bruce Evans
d9927d1118 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
Garrett Wollman
13f588f83e 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
Bruce Evans
85acc6887d Eliminated pcb_inl. It was always 0 because context switches don't occur
in interrupt handlers.
1996-07-31 12:36:11 +00:00
David Greenman
b1508c72f4 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
Bruce Evans
3817d2ffa1 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
Bruce Evans
33ded19fc2 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
John Dyson
67bf686897 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
John Dyson
78d4346178 Fix a problem with a DEBUG section of code. 1996-07-29 14:22:46 +00:00
John Dyson
b7fb357273 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
John Dyson
da54aa7fc4 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
John Dyson
4f4d35edf0 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
Satoshi Asami
92b4f2e0df Update to current state of PC98 world.
Submitted by:	The FreeBSD(98) development team
1996-07-23 07:46:59 +00:00
Joerg Wunsch
3135240845 Post-commit review by Bruce. Mostly stylistic changes.
Submitted by:	bde
1996-07-21 08:20:51 +00:00
Joerg Wunsch
99211adf2c 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
Bruce Evans
65d98215ea 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 Williams
20073b6d10 Moved declaration of zbuf outside of #ifdef DEVFS code. 1996-07-15 18:22:07 +00:00
Bruce Evans
6450111c1b 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
John Dyson
f381a0c010 Almost gratuitious improvement of the performance of reading
/dev/zero.
1996-07-14 06:05:53 +00:00
Bruce Evans
73571d2d9e 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
Bruce Evans
82ffff7ab3 Renamed upa to p0upa to match p0upt.
Cleaned up some comments.
1996-07-12 06:48:55 +00:00
Bruce Evans
3222e6db68 Export `dumpmag' to utilities but not to the kernel.
Restored a truncated comment.
1996-07-12 06:09:49 +00:00
Bruce Evans
f3460ead96 Fixed cloned comments about npx traps to match context. 1996-07-12 06:03:14 +00:00
Bruce Evans
0873c1f1c7 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
Bruce Evans
6ab46d52a5 Don't use NULL in non-pointer contexts. 1996-07-12 04:12:25 +00:00
Jordan K. Hubbard
0375cce8bc Merge. 1996-07-11 11:18:45 +00:00
Jordan K. Hubbard
9f5c1d518e Clean out some historical cruft. 1996-07-10 03:35:59 +00:00
Garrett Wollman
b184bc75f3 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
Bruce Evans
7baccf64d3 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
Bruce Evans
a111a7f827 Moved declarations of non-cpu things from <machine/cpufunc.h> to better
places.
1996-07-01 18:12:24 +00:00
Bruce Evans
d2700ee639 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 Wunsch
c683ac7c95 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
John Dyson
f43467241e 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
Bruce Evans
c673fe98d7 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
Bruce Evans
79df6d8597 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
Bruce Evans
93f4b1bf1b 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
John Dyson
cb87c9be58 Limit the scan for preloading pte's to the end of an object. 1996-06-25 00:39:21 +00:00
David Greenman
1293685583 Properly account for non-page aligned buffers. 1996-06-20 08:07:30 +00:00
David Greenman
ac269d78be Minor KNF formatting change to vmapbuf() and vunmapbuf(). 1996-06-20 01:47:21 +00:00
John Dyson
0157d6d925 Clean up vmapbuf and vunmapbuf significantly. The previous code was
very rough.
1996-06-19 03:39:24 +00:00
Bruce Evans
9b2b0822b7 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
Bruce Evans
16263f7a8b 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
John Dyson
ef743ce6ed 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
Joerg Wunsch
9306343284 Explain the options for the `od' driver. 1996-06-16 20:04:47 +00:00
Satoshi Asami
ad63a118b2 The Great PC98 Merge.
All new code is "#ifdef PC98"ed so this should make no difference to
PC/AT (and its clones) users.

Ok'd by:	core
Submitted by:	FreeBSD(98) development team
1996-06-14 11:02:28 +00:00
Stefan Eßer
21219d2116 Change CONF1_ENABLE_MSK to 0x7ff00000 in another attempt to decide
whether a system could possibly support PCI configuration mechanism 1
(or whether it rather is an EISA only system ...).
1996-06-13 21:50:41 +00:00
Satoshi Asami
d7629dff3b A fast memory copy for Pentiums using floating point registers.
It is called from copyin and copyout.

The new routine is conditioned on I586_CPU and I586_FAST_BCOPY, so you
need

options "I586_FAST_BCOPY"

(quotes essenstial) in your kernel config file.

Also, if you have other kernel types configured in your kernel, an
additional check to make sure it is running on a Pentium is inserted.
(It is not clear why it doesn't help on P6s, it may be just that the
 Orion chipset doesn't prefetch as efficiently as Tritons and friends.)

Bruce can now hack this away. :)
1996-06-13 07:17:21 +00:00
John Dyson
419702a468 Fix a very significant cnt.v_wire_count leak in vm_page.c, and some
minor leaks in pmap.c.  Bruce Evans made me aware of this problem.
1996-06-12 06:52:12 +00:00
Gary Palmer
c23670e294 Clean up -Wunused warnings.
Reviewed by:		bde
1996-06-12 05:11:41 +00:00
Paul Traina
8f33d986bc Move warning messages under bootverbose 1996-06-11 16:11:27 +00:00
Paul Traina
6d715e951e Put clock calibration #defines in opt_clock.h to ease reconfiguration 1996-06-11 16:02:55 +00:00
Bruce Evans
87bc5d1973 Removed unnecessary forward declarations of incomplete structs. 1996-06-08 11:21:19 +00:00
Bruce Evans
d85327d7bc Stop using the alias pcb_ptd' for pcb_tcc.tss_cr3'. Use the (existing)
alias `pcb_cr3' instead.  That is still one alias too many, but is convenient
for me since I've replaced the tss in the pcb by a few scalar variables in
the pcb.
1996-06-08 11:03:19 +00:00
Bruce Evans
6f74588381 Removed bogus `altfmt' code. No alternative formats are supported, but
altfmt was abused to sometimes screw up the disassembly of the bytes
following unconditional jump instructions.  Gas doesn't pad to a longword
boundary like the comment said - that is the programmer's responsibility.
1996-06-08 10:15:48 +00:00
Bruce Evans
7dad0d7ef9 Removed recently introduced unnecessary #includes of <machine/cpu.h>
(bootverbose isn't there in -current) and nearby unnecessary #includes.
1996-06-08 09:37:51 +00:00
John Dyson
886d3e1150 Adjust the threshold for blocking on movement of pages from the cache
queue in vm_fault.

Move the PG_BUSY in vm_fault to the correct place.

Remove redundant/unnecessary code in pmap.c.

Properly block on rundown of page table pages, if they are busy.

I think that the VM system is in pretty good shape now, and the following
individuals (among others, in no particular order) have helped with this
recent bunch of bugs, thanks!  If I left anyone out, I apologize!

Stephen McKay, Stephen Hocking, Eric J. Chet, Dan O'Brien, James Raynard,
Marc Fournier.
1996-06-08 06:48:35 +00:00
John Dyson
475dca82bb Fix a bug in the pmap_object_init_pt routine that pages aren't taken
from the cache queue before being mapped into the process.
1996-06-07 02:36:08 +00:00
John Dyson
3ccd871cad I missed a case of the page table page dirty-bit fix. 1996-06-05 06:36:21 +00:00
John Dyson
6b6f000870 Keep page-table pages from ever being sensed as dirty. This should fix
some problems with the page-table page management code, since it can't
deal with the notion of page-table pages being paged out or in transit.
Also, clean up some stylistic issues per some suggestions from
Stephen McKay.
1996-06-05 03:31:49 +00:00
Søren Schmidt
70013b5739 Added missing CR0_NW define for Cyrix 486DLC support. It's still not
stable on my hardware, but its better... *sigh*

Obtained from: NetBSD
1996-06-03 19:37:38 +00:00
John Dyson
3943b4ea05 Don't carry the modified or referenced bits through to the child
process during pmap_copy.  This minimizes unnecessary swapping or creation of
swap space.  If there is a hold_count flaw for page-table
pages, clear the page before freeing it to lessen the chance of a system
crash -- this is a robustness thing only, NOT a fix.
1996-06-02 22:28:53 +00:00
Joerg Wunsch
3fda1b129f Be slightly more verbose during configure() in the bootverbose case.
This breaks the long silence after the ``npx0'' message and allows to
track some of the problems regarding the root f/s decisions.
1996-06-02 18:58:39 +00:00
John Dyson
c2b39c9910 Fix the problem with pmap_copy that breaks X in small memory machines. Also
close some windows that are opened up by page table allocations.  The
prefaulting code no longer uses hold counts, but now uses the busy
flag for synchronization.
1996-06-01 19:19:21 +00:00
Peter Wemm
ee323f62ad Jump some hoops to have the *.s code being able to be run through both an
ansi and traditional cpp.

The nesting rules of macros are different, which required some changes.
Use __CONCAT(x,y) instead of /**/.
Redo some comments to use /* */ rather than "# comment" because the ansi
  cpp cares about those, and also cares about quote matching.
1996-05-31 01:08:08 +00:00
John Dyson
f35329ac0f This commit is dual-purpose, to fix more of the pageout daemon
queue corruption problems, and to apply Gary Palmer's code cleanups.
David Greenman helped with these problems also.  There is still
a hang problem using X in small memory machines.
1996-05-31 00:38:04 +00:00
John Dyson
256951297d The wrong address (pindex) was being used for the page table directory. No
negative side effects right now, but just a clean-up.
1996-05-29 05:09:07 +00:00
Poul-Henning Kamp
b13f884281 Cleanup the last of the assembly time "-KERNBASE" relocations. 1996-05-27 06:51:46 +00:00
Peter Wemm
cd61f6c584 Fix harmless warning.. pmap_nw_modified was not having it's arg
cast to pt_entry_t like the others inside the DIAGNOSTIC code.
1996-05-22 17:07:14 +00:00
John Dyson
93d52b3c56 A serious error in pmap.c(pmap_remove) is corrected by this. When
comparing the PTD pointers, they needed to be masked by PG_FRAME, and
they weren't.  Also, the "improved" non-386 code wasn't really an
improvement, so I simplified and fixed the code.  This might have
caused some of the panics caused by the VM megacommit.
1996-05-22 04:17:17 +00:00
John Dyson
ed48f831e0 To quote Stephen McKay: pmap_copy is a complex NOP at this moment :-).
With this fix from Stephen, we are getting the target fork performance
that I have been trying to attain: P5-166, before the mega-commit: 700-800usecs,
after: 600usecs, with Stephen's fix: 500usecs!!!  Also, this could be the
solution of some strange panic problems...
Reviewed by:	dyson@freebsd.org
Submitted by:	Stephen McKay <syssgm@devetir.qld.gov.au>
1996-05-21 00:39:39 +00:00
John Dyson
867a482d66 Initial support for mincore and madvise. Both are almost fully
supported, except madvise does not page in with MADV_WILLNEED, and
MADV_DONTNEED doesn't force dirty pages out.
1996-05-19 07:36:50 +00:00
John Dyson
b18bfc3da7 This set of commits to the VM system does the following, and contain
contributions or ideas from Stephen McKay <syssgm@devetir.qld.gov.au>,
Alan Cox <alc@cs.rice.edu>, David Greenman <davidg@freebsd.org> and me:

	More usage of the TAILQ macros.  Additional minor fix to queue.h.
	Performance enhancements to the pageout daemon.
		Addition of a wait in the case that the pageout daemon
		has to run immediately.
		Slightly modify the pageout algorithm.
	Significant revamp of the pmap/fork code:
		1) PTE's and UPAGES's are NO LONGER in the process's map.
		2) PTE's and UPAGES's reside in their own objects.
		3) TOTAL elimination of recursive page table pagefaults.
		4) The page directory now resides in the PTE object.
		5) Implemented pmap_copy, thereby speeding up fork time.
		6) Changed the pv entries so that the head is a pointer
		   and not an entire entry.
		7) Significant cleanup of pmap_protect, and pmap_remove.
		8) Removed significant amounts of machine dependent
		   fork code from vm_glue.  Pushed much of that code into
		   the machine dependent pmap module.
		9) Support more completely the reuse of already zeroed
		   pages (Page table pages and page directories) as being
		   already zeroed.
	Performance and code cleanups in vm_map:
		1) Improved and simplified allocation of map entries.
		2) Improved vm_map_copy code.
		3) Corrected some minor problems in the simplify code.
	Implemented splvm (combo of splbio and splimp.)  The VM code now
		seldom uses splhigh.
	Improved the speed of and simplified kmem_malloc.
	Minor mod to vm_fault to avoid using pre-zeroed pages in the case
		of objects with backing objects along with the already
		existant condition of having a vnode.  (If there is a backing
		object, there will likely be a COW...  With a COW, it isn't
		necessary to start with a pre-zeroed page.)
	Minor reorg of source to perhaps improve locality of ref.
1996-05-18 03:38:05 +00:00
Nate Williams
92d38a1399 Added commented out PCCARD entries to GENERIC, also document and add
entries in LINT.
1996-05-13 04:29:14 +00:00
Garrett Wollman
cb7545a995 Allocate mbufs from a separate submap so that NMBCLUSTERS works as
expected.
1996-05-10 19:28:55 +00:00
Poul-Henning Kamp
9f6eb8da71 Fix brino on my part. _etext doesn't include the padding to a page
boundary, which means that it doesn't mark the start of the data
section (which is then inaccessible to the programmer ??).
Hopefully fixes recent locore reboot problems.
1996-05-09 07:16:00 +00:00
Poul-Henning Kamp
aa8de40ae5 Another sweep over the pmap/vm macros, this time with more focus on
the usage.  I'm not satisfied with the naming, but now at least there is
less bogus stuff around.
1996-05-03 21:01:54 +00:00
Poul-Henning Kamp
5084d10dd0 Move atdevbase out of locore.s and into machdep.c
Macroize locore.s' page table setup even more, now it's almost readable.
Rename PG_U to PG_A (so that I can...)
Rename PG_u to PG_U.  "PG_u" was just too ugly...
Remove some unused vars in pmap.c
Remove PG_KR and PG_KW
Remove SSIZE
Remove SINCR
Remove BTOPKERNBASE

This concludes my spring cleaning, modulus any bug fixes for messes I
have made on the way.

(Funny to be back here in pmap.c, that's where my first significant
contribution to 386BSD was... :-)
1996-05-02 22:25:18 +00:00
Poul-Henning Kamp
e911eafcba removed:
CLBYTES PD_SHIFT PGSHIFT NBPG PGOFSET CLSIZELOG2 CLSIZE pdei()
        ptei() kvtopte() ptetov() ispt() ptetoav() &c &c
new:
        NPDEPG

Major macro cleanup.
1996-05-02 14:21:14 +00:00
Poul-Henning Kamp
f8845af0db First pass at cleaning up macros relating to pages, clusters and all that. 1996-05-02 10:43:17 +00:00
Poul-Henning Kamp
a8c5fef5e6 KGDB is dead. It may come back one day if somebody does it. 1996-05-02 09:34:51 +00:00
Bruce Evans
2dafbfcbab Added calibration the i8254 and the i586 clocks agains the RTC at boot
time.  The results are currently ignored unless certain temporary options
are used.

Added sysctls to support reading and writing the clock frequency variables
(not the frequencies themselves).  Writing is supposed to atomically
adjust all related variables.

machdep.c:
Fixed spelling of a function name in a comment so that I can log this
message which should have been with the previous commit.

Initialize `cpu_class' earlier so that it can be used in startrtclock()
instead of in calibrate_cyclecounter() (which no longer exists).

Removed range checking of `cpu'.  It is always initialized to CPU_XXX
so it is less likely to be out of bounds than most variables.

clock.h:
Removed I586_CYCLECTR().  Use rdtsc() instead.

clock.c:
TIMER_FREQ is now a variable timer_freq that defaults to the old value of
TIMER_FREQ.  #define'ing TIMER_FREQ should still work and may be the best
way of setting the frequency.

Calibration involves counting cycles while watching the RTC for one second.
This gives values correct to within (a few ppm) + (the innaccuracy of the
RTC) on my systems.
1996-05-01 08:39:02 +00:00
Bruce Evans
0f99c703ec i386/machdep.c
include/clock.h
isa/clock.c
1996-05-01 08:31:21 +00:00
Bruce Evans
eabe0f9f57 Don't return unused values in cpu_switch() or savectx().
Don't preserve unused registers in the NPX case in savectx().
1996-05-01 03:47:04 +00:00
Bruce Evans
2c703b3e86 Only disable sio3 by default. 1996-05-01 03:26:58 +00:00
Stefan Eßer
e20df7fc31 Make pcibus_check() ignore Device/Vendor IDs of all 0. 1996-04-30 21:37:21 +00:00
Poul-Henning Kamp
68c1eb1215 pte.h: Add the VADDR(pdi,pti) macro to construct virtual address from
page dir+table index.
pmap.h: remove NUPDE, it was wrong and not used.  Sanitize KSTKPTEOFF.
vmparam.h: Calculate virtual addr from PDI+PTI from pmap.h rather than
using magic math.  Remove UPDT, not used.
1996-04-30 12:02:12 +00:00
Poul-Henning Kamp
d783aa7bc3 Remove a spurious mapping that was introduced earlier. 1996-04-30 11:58:56 +00:00
Jordan K. Hubbard
9773398d95 Add ATAPI_STATIC so that the ATAPI cdroms work correctly again
under -current.
Submitted-By: Serge Vakulenko <vak@cronyx.ru>
1996-04-29 20:03:41 +00:00
Poul-Henning Kamp
3e86a2edb8 Fix some bugs I introduced and some old ones as well.
Add BDE_DEBUGGER back.
Improve quality of comments.
Thanks Bruce!

Reviewed by:	phk
Submitted by:	bde
1996-04-28 07:14:05 +00:00
Bruce Evans
f4c626074b Fixed a bug introoduced in the previous change. ISA device memory was
mapped to semi-random place(s) depending on the content(s) of physical
address 0xA0000.  This was fatal at least on my system with a some
memory-mapped devices.  Console syscons somehow wasn't affected.  It
bogusly hardcodes the address.  Sigh.
1996-04-26 22:26:45 +00:00
Poul-Henning Kamp
1a0e8e31c6 A significant debogofication of locore.s. I havn't found any actualy
bugs, but it is a lot easier to navigate this twisted code now.
1996-04-26 13:47:39 +00:00
Poul-Henning Kamp
68832d3037 Fix cpu_fork for real.
Suggested by:	 bde
1996-04-25 06:20:19 +00:00
Nate Williams
e597b4972e - add apm to the GENERIC kernel (disabled by default), and add some comments
regarding apm to LINT
- Disabled the statistics clock on machines which have an APM BIOS and
  have the options "APM_BROKEN_STATCLOCK" enabled (which is default
  in GENERIC now)
- move around some of the code in clock.c dealing with the rtc to make
  it more obvios the effects of disabling the statistics clock

Reviewed by:	bde
1996-04-22 19:40:28 +00:00
John Dyson
7847cec1b7 This fixes a troubling oversight in some of the pmap code enhancements.
One of the manifiestations of the problem includes the -4 RSS problem
in ps.

Reviewed by: dyson
Submitted by: Stephen McKay <syssgm@devetir.qld.gov.au>
1996-04-22 05:23:08 +00:00
Justin T. Gibbs
1d7ded8adf Change the devconf description from "ISA or EISA bus" to "ISA bus" now
that we have eisaconf.
1996-04-20 21:22:32 +00:00
Poul-Henning Kamp
6f1e6c97de savectx returns through cpu_switch in case of the child, so it must
return void just like cpu_switch.  Fix prototype and usage from machdep.c
1996-04-19 07:28:04 +00:00
Poul-Henning Kamp
7d2392141d Fix a bogon. cpu_fork & savectx ecpected cpu_switch to restore %eax,
they shouldn't.
1996-04-18 21:34:53 +00:00
Nate Williams
6bb76283e0 Added a disabled psm0 (PS/2) mouse device, using the new 'disable'
keyword.
1996-04-18 04:02:30 +00:00
Bruce Evans
0513ce7f75 Use PCB_SAVEFPU_SIZE instead of a too-small size in savectx(). This
bug only affected FPU emulators.  It might have caused bogus FPU states
in core dumps and in the child pcb after a fork.  Emulated FPU states
in core dumps don't work for other reasons, and the child FPU state
is reinitialized by exec, so the problem might not have caused any
noticeable affects.

Cleaned up #includes.
1996-04-13 11:24:13 +00:00
Bruce Evans
5b5220556d Generate #define of PCB_SAVEFPU_SIZE for use in savectx(). 1996-04-13 11:22:57 +00:00
Poul-Henning Kamp
22a31706dc Make alltraps a .globl so that DDB doesn't make people belive they have
an ALIGNFLT on their hands all the time.
1996-04-12 12:22:14 +00:00
Bruce Evans
3745f80a48 Moved AUTO_EOI_[12] and most sio and pcvt options out of the makefile. 1996-04-11 21:18:49 +00:00
Jordan K. Hubbard
7506b46e07 Disable sio3 in GENERIC - it messes with ATI cards. 1996-04-10 23:03:36 +00:00
Nate Williams
9368fc2012 hp300 -> i386 1996-04-10 05:27:11 +00:00
Jordan K. Hubbard
dbb315cb8e Gag! Somebody removed the bus mouse from GENERIC for reasons unknown.
That certainly explains why I noticed it suddenly missing from the
2.2 SNAPSHOT! :-)
1996-04-09 09:00:41 +00:00
Sujal Patel
1dce4e5d60 Add a lock for DMA Channels to prevent two devices from using the same DMA
channel at the same time.  The functions isa_dma_acquire() and
isa_dma_release() should be used in all ISA drivers which call isa_dmastart().
This can be used more generally to register the usage of DMA channels in
any driver, but it is required for drivers using isa_dmastart() and friends.

Clean up sanity checks, error messages, etc.
Remove isa_dmadone_nobounce(), it is no longer needed

Reviewed by:	bde
1996-04-08 19:38:57 +00:00
Garrett Wollman
dadd5f3a95 Added a $Id$ keyword. Bruce still needs to put a copyright notice
on this file.
1996-04-08 16:41:06 +00:00
Bruce Evans
3fd674e22b Use breakpoint() function instead of inline assembler. 1996-04-07 18:34:59 +00:00
Bruce Evans
5dbd168e2e Changed bdb() to breakpoint() and always enable it.
Made the style more consistent, especially for the new Pentium functions.
1996-04-07 18:30:56 +00:00
Bruce Evans
6ffde942bf Removed never-used #includes of <machine/cpu.h>. Many were apparently
copied from bad examples.
1996-04-07 17:39:28 +00:00
Bruce Evans
3157adc8af Removed now-unused #includes of <machine/cpu.h>. They were for bootverbose
being declared in the wrong place.
1996-04-07 17:32:42 +00:00
Bruce Evans
73dc05d67c Moved declaration of bootverbose to a better place. It isn't
machine-dependent.

Moved declaration of cpu_fork() to a better place.  Only its
implementation is machine-dependent.
1996-04-07 16:44:28 +00:00
Bruce Evans
5e0f6c4338 Fixed the ownership and permissions of /dev/io. Rev.1.32 broke rev.1.29. 1996-04-07 14:59:26 +00:00
John Dyson
07b1059113 Major cleanups for the pmap code. 1996-04-07 02:23:05 +00:00
David Greenman
baddaf9480 Switch 586/686 back to generic_bzero and #if 0'd the "optimized" code. It
turns out that it actually reduces performance in real-world cases.

Noticed by:	bde
1996-04-06 01:06:06 +00:00
Andrey A. Chernov
2cb9219c5d Fix adjkerntz expression priority 1996-04-05 18:56:10 +00:00
Andrey A. Chernov
fe0d5f43c5 Add wall_cmos_clock sysctl variable, needed to manage adjkerntz even for
UTC cmos clocks (needed for Local Timezone FSes)
1996-04-05 03:36:31 +00:00
John Dyson
030ad08012 Fixed a problem that the UPAGES of a process were being run down
in a suboptimal manner.  I had also noticed some panics that appeared
to be at least superficially caused by this problem.  Also, included
are some minor mods to support more general handling of page table page
faulting.  More details in a future commit.
1996-04-03 05:23:44 +00:00
Marc G. Fournier
f28213ad1d Convert from using devfs_add_devsw() to devfs_add_devswf()
Fixed Permissions/Ownership in DEVFS to reflect /dev
1996-04-01 21:02:14 +00:00
David Greenman
909e5e0e77 Change if/goto into a while loop. 1996-03-31 23:00:32 +00:00
Bruce Evans
048cd610ad Finished removing NOP macros. 1996-03-31 04:17:25 +00:00
Bruce Evans
ef9805a3c8 Moved rtcin() to clock.c.
Always delay using one inb(0x84) after each i/o in rtcin() - don't
do this conditional on the bogus option DUMMY_NOPS not being defined.
If you want an optionally slightly faster rtcin() again, then inline
it and use a better named option or sysctl variable.  It only needs
to be fast in rtcintr().
1996-03-31 04:05:36 +00:00
Bruce Evans
5d170d7eb8 Killed religous FASTER_NOP again. 1996-03-31 03:31:29 +00:00
Bruce Evans
a680ab7537 Count PCI irqs in up to 4 ISAish counters named `pci irqnn' instead of
in the clk0 counter.

Reviewed by:	s
1996-03-29 15:01:51 +00:00
Bruce Evans
78966e20d9 Parenthesized macros.
Fixed munged tabs.
1996-03-29 14:14:07 +00:00
Garrett Wollman
28dc3d2757 >Blush<. Use the correct opcode for the WRMSR instruction. 1996-03-28 20:39:45 +00:00
Garrett Wollman
f7ff248201 Teach the disassembler about the 0f,3x family of instructions
(RDMSR, RDTSC, WRMSR, and RDPMC).
1996-03-28 20:35:03 +00:00
John Dyson
4e489ec421 Remove a now unnecessary prototype from pmap.c. Also remove now
unnecessary vm_fault's of page table pages in trap.c.
1996-03-28 05:40:58 +00:00
John Dyson
208bfdc98b Significant code cleanup, and some performance improvement. Also,
mlock will now work properly without killing the system.
1996-03-28 04:59:34 +00:00
Bruce Evans
3dffe3c5f6 Fixed permissions of /devfs/*random.
Fixed group and permissions of /devfs/perfmon.
1996-03-27 19:04:55 +00:00
Bruce Evans
ba00d77a82 Print stack pointer and frame pointer in trap messages.
Fixed "trace/trap" message.

Reviewed by:	davidg
1996-03-27 17:33:39 +00:00
Bruce Evans
8102fcda9b Eliminated dependency on opt_sysvipc.h. 1996-03-27 17:21:57 +00:00
Bruce Evans
6d72aad8a7 Removed vestiges of dummy frame at top of tmpstk.
Use alignment macros where appropriate.

Cleaned up #includes.
1996-03-27 17:16:29 +00:00
Bruce Evans
6003d411e1 Fixed traceback for the following cases:
- legitimate null frames from idle() (traceback was aborted after a null
  pointer trap)
- second instruction of normal function prologue, and last instruction of
  a function (caller wasn't reported).

Reviewed by:	davidg
1996-03-27 17:06:03 +00:00
Garrett Wollman
d69e850255 Add support for Pentium and Pentium Pro performance counters.
(This code is as yet untested; to come after man page is written.)
This also adds inlines to cpufunc.h for the RDTSC, RDMSR, WRMSR, and RDPMC
instructions.  The user-mode interface is via a subdevice of mem.c;
there is also a kernel-size interface which might be used to aid
profiling.
1996-03-26 19:57:56 +00:00
Nate Williams
cdf642d171 Whoops, back out the last commit, which was accidentally committed at
the same time as the if_zp cleanup patch.

The commit that occurred was an incomplete patch for APM on my laptop
and needs more work.
1996-03-23 21:36:03 +00:00
Nate Williams
ada00a4447 Now that ac->ac_ipaddr and arpwhohas() no longer exist, remove the
ifdef'd out code that used it.
1996-03-23 21:32:39 +00:00