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Commit Graph

927 Commits

Author SHA1 Message Date
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
Jordan K. Hubbard
51fa90c524 Add vx0 device to GENERIC. Yes, I know that this bloats GENERIC, but
what can we do?
1996-03-20 10:42:56 +00:00
Nate Williams
8371872e22 Always enable interrupts before calling the APM idle/busy routines.
Suggested by:	phk@FreeBSD.org
1996-03-19 04:40:03 +00:00
Jordan K. Hubbard
a732b754b4 Add fe0 to the LINT and GENERIC files (hmmm - looks like my rcvs setup't
isn't supplying all the proper header info here!  Last commit of fe0
entry should have had the following Submitted by line also).
Submitted-by: Masahiro SEKIGUCHI <seki@sysrap.cs.fujitsu.co.jp>
1996-03-17 08:39:51 +00:00
John Dyson
3ce8e60f5b Make sure that we pmap_update AFTER modifying the page table entries.
The P6 can do a serious job of reordering code, and our stuff could
execute incorrectly.
1996-03-13 00:39:45 +00:00
David Greenman
dc92971788 Killed some historical #define cruft that we've never used in FreeBSD:
UDOT_SZ
SYSPTSIZE
USRPTSIZE
MSGBUFPTECNT
DMMIN
DMMAX
DMTEXT
USRIOSIZE
VM_PHYS_SIZE
1996-03-12 15:37:58 +00:00
Nate Williams
44f0e01b25 Removed undocumented an unused APM_SLOWSTART code. 1996-03-12 05:44:25 +00:00
Jordan K. Hubbard
25cf9d99fb Add FAILSAFE option for selecting extra conservativeness when such
is more practical (like during installation).  Correspondingly, set the
option by default in GENERIC now.
1996-03-11 18:47:39 +00:00
Jeffrey Hsu
6ad138306c For Lite2: proc LIST changes.
Reviewed by:	david & bde
1996-03-11 05:55:56 +00:00
Jeffrey Hsu
375c803b36 Change type of code argument to sendsig from unsigned to u_long to make it
consistent w/ signalvar.h and kern_sig.c.
Reviewed by:	davidg & bde
1996-03-11 02:21:42 +00:00
John Dyson
874308f7c2 Improved efficiency in pmap_remove, and also remove some of the pmap_update
optimizations that were probably incorrect.
1996-03-10 23:06:00 +00:00
Justin T. Gibbs
58a8ca6a4d Cleanse the SCSI subsystem of its internally defined types
u_int32, u_int16, u_int8, int32, int16, int8.
	Use the system defined *_t types instead.
1996-03-10 07:04:48 +00:00
Jordan K. Hubbard
3873c27840 Don't print DMA busy messages - the sound code apparently runs
afoul of this without actually providing useful information and
works nonetheless.
Submitted by:	Jim Lowe <james@miller.cs.uwm.edu>
1996-03-10 02:10:27 +00:00
John Dyson
9212ebc656 Correct some new and older lurking bugs. Hold count wasn't being
handled correctly.  Fix some incorrect code that was included
to improve performance. Significantly simplify the pmap_use_pt and
pmap_unuse_pt subroutines.  Add some more diagnostic code.
1996-03-09 07:01:21 +00:00
Jordan K. Hubbard
0dbf6d736f USER_LDT changes for the Willows TwinXPDK toolkit. Only tested with WINE
since that's the only other USER_LDT using code that I know of.
Submitted by:	Gary Jennejohn <Gary.Jennejohn@munich.netsurf.de>
Obtained from: {Origin of diffs may be someone else - I only rec'd them from
Gary}
1996-03-03 01:57:45 +00:00
Peter Wemm
d66a506616 Mega-commit for Linux emulator update.. This has been stress tested under
netscape-2.0 for Linux running all the Java stuff.  The scrollbars are now
working, at least on my machine. (whew! :-)

I'm uncomfortable with the size of this commit, but it's too
inter-dependant to easily seperate out.

The main changes:

COMPAT_LINUX is *GONE*.  Most of the code has been moved out of the i386
machine dependent section into the linux emulator itself.  The int 0x80
syscall code was almost identical to the lcall 7,0 code and a minor tweak
allows them to both be used with the same C code.  All kernels can now
just modload the lkm and it'll DTRT without having to rebuild the kernel
first.  Like IBCS2, you can statically compile it in with "options LINUX".

A pile of new syscalls implemented, including getdents(), llseek(),
readv(), writev(), msync(), personality().  The Linux-ELF libraries want
to use some of these.

linux_select() now obeys Linux semantics, ie: returns the time remaining
of the timeout value rather than leaving it the original value.

Quite a few bugs removed, including incorrect arguments being used in
syscalls..  eg:  mixups between passing the sigset as an int, vs passing
it as a pointer and doing a copyin(), missing return values, unhandled
cases, SIOC* ioctls, etc.

The build for the code has changed.  i386/conf/files now knows how
to build linux_genassym and generate linux_assym.h on the fly.

Supporting changes elsewhere in the kernel:

The user-mode signal trampoline has moved from the U area to immediately
below the top of the stack (below PS_STRINGS).  This allows the different
binary emulations to have their own signal trampoline code (which gets rid
of the hardwired syscall 103 (sigreturn on BSD, syslog on Linux)) and so
that the emulator can provide the exact "struct sigcontext *" argument to
the program's signal handlers.

The sigstack's "ss_flags" now uses SS_DISABLE and SS_ONSTACK flags, which
have the same values as the re-used SA_DISABLE and SA_ONSTACK which are
intended for sigaction only.  This enables the support of a SA_RESETHAND
flag to sigaction to implement the gross SYSV and Linux SA_ONESHOT signal
semantics where the signal handler is reset when it's triggered.

makesyscalls.sh no longer appends the struct sysentvec on the end of the
generated init_sysent.c code.  It's a lot saner to have it in a seperate
file rather than trying to update the structure inside the awk script. :-)

At exec time, the dozen bytes or so of signal trampoline code are copied
to the top of the user's stack, rather than obtaining the trampoline code
the old way by getting a clone of the parent's user area.  This allows
Linux and native binaries to freely exec each other without getting
trampolines mixed up.
1996-03-02 19:38:20 +00:00
Peter Wemm
4bd4912865 Add more options into the conf/options and i386/conf/options.i386 files
and the #include hooks so that 'make depend' is more useful.  This
covers most of the options I regularly use (but not all) and some other
easy ones.
1996-03-02 18:24:13 +00:00
John Dyson
d6673cba8a Re-insert a missing pmap_remove operation. 1996-02-25 05:08:57 +00:00
John Dyson
3eb77c8302 Fix a problem with tracking the modified bit. Eliminate the
ugly inline-asm code, and speed up the page-table-page tracking.
1996-02-25 03:02:53 +00:00
Poul-Henning Kamp
d0cb65474e Correct & Update the printing of CPU features. We have printed rubbish
since version 1.117 when Garrett made the switch to %b.  Updated to
reflect Intel AP-485 (241618-004).
1996-02-13 10:30:36 +00:00
David Greenman
f83a01b63f Unspam my changes in rev 1.54 that John spammed in rev 1.55. 1996-02-05 14:23:19 +00:00
John Dyson
dca5129987 Changed vm_fault_quick in vm_machdep.c to be global. Needed for
new pipe code.
1996-02-04 22:09:12 +00:00
David Greenman
267173e72d Rewrote cpu_fork so that it doesn't use pmap_activate, and removed
pmap_activate since it's not used anymore. Changed cpu_fork so that
it uses one line of inline assembly rather than calling mvesp() to
get the current stack pointer. Removed mvesp() since it is no longer
being used.
1996-02-04 21:20:53 +00:00
David Greenman
ac474627f4 Killed last change - it was bogus. cpu_switch() already assumes that
return address is on the stack.
1996-02-02 18:30:06 +00:00
Mike Pritchard
6c5e9bbdf5 Fix a bunch of spelling errors in the comment fields of
a bunch of system include files.
1996-01-30 23:02:38 +00:00
Garrett Wollman
3addba4f55 No longer use the cyclecounter to attempt to correct for late or missed
clock interrupts.

Keep a 1-in-16 smoothed average of the length of each tick.  If the
CPU speed is correctly diagnosed, this should give experienced users
enough information to figure out a more suitable value for `tick'.
1996-01-30 18:56:47 +00:00
David Greenman
b09fb6432d savectx() strikes again: the saved stack pointer wasn't properly adjusted
to remove the return address. It's only the frame pointer and luck that
allowed the code to work at all.
1996-01-30 12:54:21 +00:00
David Greenman
3dd78b2bcd Increase tmpstk size to 8K and make certain it is longword aligned. 1996-01-30 07:59:02 +00:00
Bruce Evans
dd87702a51 Allocate DMA bounce buffers only when requested by drivers. Only the
fd and wt drivers need bounce buffers, so this normally saves 32K-1K
of kernel memory.

Keep track of which DMA channels are busy.  isa_dmadone() must now be
called when DMA has finished or been aborted.

Panic for unallocated and too-small (required) bounce buffers.

fd.c:
There will be new warnings about isa_dmadone() not being called after
DMA has been aborted.

sound/dmabuf.c:
isa_dmadone() needs more parameters than are available, so temporarily
use a new interface isa_dmadone_nobounce() to avoid having to worry
about panics for fake parameters.  Untested.
1996-01-27 02:33:48 +00:00
Bruce Evans
227b8bf258 Cleaned up unused #includes and some other historical cruft.
Sorted and KNFised declarations.
1996-01-27 01:56:30 +00:00
Peter Wemm
bf6024ee3a Add commands for ptrace get/set registers.. (Same numbers as NetBSD) 1996-01-24 18:51:48 +00:00
David Greenman
2924d49169 Simplified savectx() a little and fixed a bug that caused it to return
garbage in the child process rather than "1" like it is supposed to.

Reviewed by:	bde
1996-01-23 02:39:24 +00:00
Joerg Wunsch
e66e939ed6 Initialize the cpu_class variable. This prevents i386 machines from
panicing with a privileged instruction fault early at boot time.
Submitted by:	rock@wurzelausix.CS.Uni-SB.DE (D. Rock)
1996-01-21 20:57:03 +00:00
Nate Williams
4e5935064c Added a comment above the npx0 device line
# Mandatory, don't remove
1996-01-20 06:14:33 +00:00
Poul-Henning Kamp
c92a064d21 Reinstate AUTO_EOI_1. This did break suspend/resume on some portables.
In particular mine.  We may want to make it a negative option to
keep GENERIC sane, ie NO_AUTO_EOI_1.
1996-01-19 23:38:07 +00:00
Peter Wemm
1a46737f84 Some trivial fixes to get it to compile again, plus some new lint:
- cpuclass should be cpu_class
- CPUCLASS_I386 should be CPUCLASS_386
(^^ those only show up if you compile for i386)
- two missing prototypes on new functions
- one missing static
1996-01-19 14:19:56 +00:00
John Dyson
bd7e5f992e Eliminated many redundant vm_map_lookup operations for vm_mmap.
Speed up for vfs_bio -- addition of a routine bqrelse to greatly diminish
	overhead for merged cache.
Efficiency improvement for vfs_cluster.  It used to do alot of redundant
	calls to cluster_rbuild.
Correct the ordering for vrele of .text and release of credentials.
Use the selective tlb update for 486/586/P6.
Numerous fixes to the size of objects allocated for files.  Additionally,
	fixes in the various pagers.
Fixes for proper positioning of vnode_pager_setsize in msdosfs and ext2fs.
Fixes in the swap pager for exhausted resources.  The pageout code
	will not as readily thrash.
Change the page queue flags (PG_ACTIVE, PG_INACTIVE, PG_FREE, PG_CACHE) into
	page queue indices (PQ_ACTIVE, PQ_INACTIVE, PQ_FREE, PQ_CACHE),
	thereby improving efficiency of several routines.
Eliminate even more unnecessary vm_page_protect operations.
Significantly speed up process forks.
Make vm_object_page_clean more efficient, thereby eliminating the pause
	that happens every 30seconds.
Make sequential clustered writes B_ASYNC instead of B_DELWRI even in the
	case of filesystems mounted async.
Fix a panic with busy pages when write clustering is done for non-VMIO
	buffers.
1996-01-19 04:00:31 +00:00
Bruce Evans
e65a471221 Removed declarations of nonexistent functions. 1996-01-16 07:42:08 +00:00
Andrey A. Chernov
d85314fa5f Since new bcd* macros not argument range overflow resistant,
fix argument overflow for years >= 2000
1996-01-16 06:35:40 +00:00
Poul-Henning Kamp
791d77e0dd Get rid of two and a half printf in the kernel.
Add more features to the one remaining to handle the job:
	+	signed quantity.
	#	alternate format
	-	left padding
	*	read width as next arg.
	n	numeric in (argument specified) default radix.

Fix the DDB debugger to use these.
Use vprintf in debug routine in pcvt.

The warnings from gcc may become more wrong and  intolerable because
of this.

Warning:  I have not checked the entire source for unsupported or
changed constructs, but generally belive that there are only a few.

Suggested by: bde
1996-01-15 22:41:03 +00:00
Poul-Henning Kamp
3eb50b2edd My wife is busy making me a new conical hat, so you don't need to
send any to me this time.  Commited an old copy of this files where
the tables were swapped.  Duh!.
1996-01-15 21:26:43 +00:00
Poul-Henning Kamp
e95fbcfeb4 Soren called an said that I screwed up badly, so I backup until
I find out how... Sorry.
1996-01-15 21:12:50 +00:00
Poul-Henning Kamp
2898c294f4 Make bin2bcd and bcd2bin global macroes instead of having local
implementations all over the place.
1996-01-15 10:28:44 +00:00
Bruce Evans
f668341de4 Fixed handling of Feb 29 in resettodr(). 1996-01-12 17:33:12 +00:00
Andrey A. Chernov
dc3f9062ca Replace ugly year/month calculations in resettodr to more clean
variants, idea taken from NetBSD clock.c.
At least year calculation was wrong, pointed by Bruce.
Use different strategy to store year for BIOS without RTC_CENTURY
1996-01-08 18:50:14 +00:00
Justin T. Gibbs
a8ce2e68d7 Add comment about only needing on of either ahc, ncr, or ahb type
controllers to handle any number of devices.
Remove unnecessary extra units for these controllers.
1996-01-07 19:19:38 +00:00
Peter Wemm
d92566062f Choose a different name to hold the option definition.. The original one
was overlapping with another file, and making some undesirable behavior a
little worse - it's triggering a bug in config that appears to have been
there for some time (before the options files, anyway.)
1996-01-06 23:10:57 +00:00
Garrett Wollman
8890984dc9 Convert BOUNCE_BUFFERS and BOUNCEPAGES to new option scheme. 1996-01-05 20:12:53 +00:00
Garrett Wollman
0e41ee3037 Convert DDB to new-style option. 1996-01-04 21:13:23 +00:00
Garrett Wollman
50c73f3620 Convert SYSV IPC to new-style options. (I hope I got everything...)
The LKMs will need an extra file, to come later.
1996-01-04 20:29:06 +00:00
Garrett Wollman
a73af3a214 convert the math emulation to use the new-style options. 1996-01-04 19:51:50 +00:00
Garrett Wollman
db6a20e23e Converted two options over to the new scheme: USER_LDT and KTRACE. 1996-01-03 21:42:35 +00:00
Bruce Evans
e5171bbec0 Fixed user-mode mcount which I broke in the previous revision.
Do it the old way for now.

Moved recent additions around a lot to minimise ifdefs.

Added prototypes.
1996-01-01 17:11:21 +00:00
Joerg Wunsch
cfaaf1594e Restrict /devfs/io perms to 0600.
Nobody in our regular source tree, or in the non-distfile part of the
ports tree does use /dev/io anyway, so this might be replaced by
another scenario some day.
1995-12-31 09:32:16 +00:00
David Greenman
b2b1f785bc In memory test, cast pointer as "volatile int *", not "int *" to make sure
that gcc doesn't cache the value used in the test. Pointed out by Erich
Boleyn <erich@uruk.org>.
1995-12-30 23:13:32 +00:00
Bruce Evans
912e603778 Implemented non-statistical kernel profiling. This is based on
looking at a high resolution clock for each of the following events:
function call, function return, interrupt entry, interrupt exit,
and interesting branches.  The differences between the times of
these events are added at appropriate places in a ordinary histogram
(as if very fast statistical profiling sampled the pc at those
places) so that ordinary gprof can be used to analyze the times.

gmon.h:
Histogram counters need to be 4 bytes for microsecond resolutions.
They will need to be larger for the 586 clock.
The comments were vax-centric and wrong even on vaxes.  Does anyone
disagree?

gprof4.c:
The standard gprof should support counters of all integral sizes
and the size of the counter should be in the gmon header.  This
hack will do until then.  (Use gprof4 -u to examine the results
of non-statistical profiling.)

config/*:
Non-statistical profiling is configured with `config -pp'.
`config -p' still gives ordinary profiling.

kgmon/*:
Non-statistical profiling is enabled with `kgmon -B'.  `kgmon -b'
still enables ordinary profiling (and distables non-statistical
profiling) if non-statistical profiling is configured.
1995-12-29 15:30:05 +00:00
Jordan K. Hubbard
56c7a48c93 Make a couple of options that hurt when they're removed more
carefully noted.
1995-12-29 02:04:20 +00:00
David Greenman
d079690c14 Made bzero a function vector and added a 586/686 optimized version of
bzero.
Deprecated blkclr (removed it).
Removed some old cruft from cpufunc.h.

The optimized bzero was submitted by Torbjorn Granlund <tege@matematik.su.se>
The kernel adaption and other changes by me.
1995-12-28 23:34:30 +00:00
David Greenman
83e33b0197 Made bzero a function vector and added a 586/686 optimized version of
bzero.
Deprecated blkclr (removed it).
Removed some old cruft from cpufunc.h.

The optimized bzero was submitted by Torbjorn Granlund <tege@matematik.su.se>
The kernel adaption and other changes by me.
1995-12-28 23:14:40 +00:00
David Greenman
99beca17d7 Fix one more label that I overlooked with the P6 support. Sigh. 1995-12-28 21:01:54 +00:00
David Greenman
014374187c Update bcopyb & bcopy to reflect changes I made in the libc version of
bcopy:

Be smarter about handling overlapped copies and only go backwards if it
is really necessary. Going backwards on a P6 is much slower than forwards
and it's a little slower on a P5. Also moved the count mask and 'std'
down a few lines - it's a couple percent faster this way on a P5.
1995-12-27 18:54:51 +00:00
Mark Murray
0738b16169 random_machdep.c: New version, also includes revectored interrupts, rather
than hooking permanently.
vector.s:       : Remove the interrupt hook. This is done dynamically, now.
1995-12-27 11:22:05 +00:00
Mark Murray
e85ceed0ff Modify the ioctl to handle revectored interrupts for the entropy gatherers. 1995-12-27 11:18:29 +00:00
Bruce Evans
62394a63c8 Removed almost all traces of libkern.a. The objects that were in
libkern.a are now specified by listing their source files in
files.${MACHINE}.  The list is machine-dependent to save space.
All the necessary object for each machine must be linked into the
kernel in case an lkm wants one.
1995-12-26 13:58:31 +00:00
David Greenman
d7b1079903 Fix a lable goofup I made in the previous P6 support changes. 1995-12-25 14:40:49 +00:00
David Greenman
5493045648 Fix typo in CPUCLASS. 1995-12-25 01:02:32 +00:00
David Greenman
17acc2b264 Added device fxp0 (device driver for Intel EtherExpress Pro/100). 1995-12-24 08:13:23 +00:00
David Greenman
7059cdf2d3 Added I686_CPU. 1995-12-24 08:11:46 +00:00
David Greenman
6410f76727 Add Pentium Pro CPU detection and special handling. For now, all the
optimizations we have for 586s also apply to 686s...this will be fine-
tuned in the future as appropriate.
1995-12-24 08:10:52 +00:00
David Greenman
e8636c6c19 Made "AUTO_EOI_1" standard. auto-EOI on the master ICU is a documented
feature of the ICU. auto-EOI on the slave is not safe, however, so it
remains an option. Killed religious FASTER_NOP when writing the ICU.

Reviewed by:	bde
1995-12-23 16:53:57 +00:00
David Greenman
44198d45b6 Use FASTER_NOP rather than NOP in rtcin() - only one inb delay was ever
needed.
Reviewed by:	bde
1995-12-23 16:46:31 +00:00
Bruce Evans
e390090674 Staticized code that was hidden by `#ifdef DEBUG'. 1995-12-22 18:21:26 +00:00
Bruce Evans
02f90f3b3c Increased the double fault stack size from 512 to PAGE_SIZE. This is
wasteful, but better than clobbering the variables below the stack.
About 300 bytes of variables were clobbered when I examined double
faults using ddb.  Perhaps a page that is known not to be accessed by
the double fault handler could be used.  Such pages are not easy to
find, since the double fault handler calls panic() which calls sync()
and possibly dumpsys().
1995-12-22 18:17:34 +00:00
David Greenman
b0aa8fc32f Fix a small logic bug that caused the arguments of the previous frame to
be used instead of the ones for the current frame if a breakpoint had been
set at the entry to a function.
1995-12-22 07:09:24 +00:00