Commit Graph

1394 Commits

Author SHA1 Message Date
Stefan Eßer
b3daa02e72 Yet another fix for configuration mechanism 1 register accesses:
Adjust the data port address by adding the two low order bits of
the register number. The address port takes only a word address
(i.e. ignores the two low order bits written to it).
1997-05-26 21:52:41 +00:00
Stefan Eßer
64039d403f Fix previous fix: The enable bit is bit 31 (0x8000000) and not bit 15. 1997-05-26 21:25:24 +00:00
Stefan Eßer
e0c57a9615 Set enable bit when writing the configuration address in configuration
mode 1. Omission of this bit makes all config register accesses fail in
on recent chip sets ...

(The problem was reported and debug output provided by: Steve Passe)
1997-05-26 21:11:05 +00:00
Steve Passe
c4ed75ce19 Fix breakage from my last commit where mp_start() was missing from UP builds. 1997-05-26 18:40:45 +00:00
Steve Passe
694f6724f1 Changed inclusion of isa/icu.s to isa/ipl.s.
This is part of the breakup of UP/SMP specific INTerrupt code.
1997-05-26 18:00:34 +00:00
Steve Passe
81c1993f87 Split vector.s into UP and SMP specific files:
- vector.s		<- stub called by i386/exception.s
 - icu_vector.s		<- UP
 - apic_vector.s	<- SMP

Split icu.s into UP and SMP specific files:
 - ipl.s		<- stub called by i386/exception.s (formerly icu.s)
 - icu_ipl.s		<- UP
 - apic_ipl.s		<- SMP

This was done in preparation for massive changes to the SMP INTerrupt
mechanisms.  More fine tuning, such as merging ipl.s into exception.s,
may be appropriate.
1997-05-26 17:58:27 +00:00
Stefan Eßer
5bec615793 Completely replace the PCI bus driver code to make it better reflect
reality. There will be a new call interface, but for now the file
pci_compat.c (which is to be deleted, after all drivers are converted)
provides an emulation of the old PCI bus driver functions. The only
change that might be visible to drivers is, that the type pcici_t
(which had been meant to be just a handle, whose exact definition
should not be relied on), has been converted into a pcicfgregs* .

The Tekram AMD SCSI driver bogusly relied on the definition of pcici_t
and has been converted to just call the PCI drivers functions to access
configuration space register, instead of inventing its own ...

This code is by no means complete, but assumed to be fully operational,
and brings the official code base more in line with my development code.

A new generic device descriptor data type has to be agreed on. The PCI
code will then use that data type to provide new functionality:

1) userconfig support
2) "wired" PCI devices
3) conflicts checking against ISA/EISA
4) maps will depend on the command register enable bits
5) PCI to Anything bridges can be defined as devices,
   and are probed like any "standard" PCI device.

The following features are currently missing, but will be added back,
soon:

1) unknown device probe message
2) suppression of "mirrored" devices caused by ancient, broken chip-sets

This code relies on generic shared interrupt support just commited to
kern_intr.c (plus the modifications of isa.c and isa_device.h).
1997-05-26 15:08:43 +00:00
Stefan Eßer
4c9340d45c Add support for shared interrupts to the kernel. This code is meant
be (eventually) architecture independent. It provides an emulation
of the ISA interrupt registration function register_intr(), but that
function does no longer manipulated the interrupt controller and
interrupt descriptor table, but calls the architecture dependent
function setup_icu() for that purpose.

After the ISA/EISA bus code has been modified to directly call the new
interrupt registartion functions (intr_create() and intr_connect()),
the emulation of register_intr() should be dropped.

The C level interrupt handler function should take a (void*) argument,
and the function pointer type (inthand2_t) should defined in some  other
place than isa_device.h.

This commit is a pre-requisite for the removal of the PCI specific shared
interrupt code.

Reviewed by:    dfr,bde
1997-05-26 14:42:24 +00:00
Steve Passe
1ffa54ef38 Added a test called 'LATE_START'.
This is now the default, it delays most of the MP startup to the function
machdep.c:cpu_startup().  It should be possible to move the 2 functions
found there (mp_start() & mp_announce()) even further down the path once
we know exactly where that should be...

Help from: Peter Wemm <peter@spinner.dialix.com.au>
1997-05-26 09:23:30 +00:00
Steve Passe
383243e687 Made the array vec[] a global.
This allows the APIC code to reorder the vectors at runtime.
1997-05-25 16:55:26 +00:00
Steve Passe
45fedb144d Broke up parse_mp_table() into 2 passes:
- The 1st (preparse_mp_table()) counts the number of cpus, busses, etc. and
   records the LOCAL and IO APIC addresses.
 - The 2nd pass (parse_mp_table()) does the actual parsing of info and recording
   into the incore MP table.

This will allow us to defer the 2nd pass untill malloc() & private pages
are available (but thats for another day!).
1997-05-25 02:49:03 +00:00
Steve Passe
2515353993 Delay mp_start() till after the msgbuf is mapped. We really want to delay
it till even later but tss setup prevents that right now...
1997-05-24 18:59:02 +00:00
Steve Passe
7f6c65fa06 Now that panic() is properly printing messages for early SMP panics all
the 'printf("..."); panic("\n")' sections are returned to 'panic("...")'.
1997-05-24 18:48:53 +00:00
Philippe Charnier
f29fffef82 typo (Cyirx -> Cyrix). 1997-05-23 06:22:47 +00:00
Steve Passe
89921bb594 Convert all:
panic( "xxxxx\n" );

to:
 printf( "xxxxx\n" );
 panic( "\n" );

For some as yet undetermined reason the argument to panic() is often NOT
printed, and the system sometimes hangs before reaching the panic printout.
So we hopefully at least print some useful info before the hang, as oppossed to
leaving the user clueless as to what has happened.
1997-05-22 22:35:42 +00:00
John Polstra
61b005296f This commit affects ELF kernels only.
Remove "setdefs.h" and arrange to generate it automatically at
ELF kernel build time.

"gensetdefs.c" is a utility which scans a set of ELF object files
and outputs a line ``DEFINE_SET(name, length);'' for each linker
set that it finds.  When generating an ELF kernel, this is run just
before the final link to generate "setdefs.h".

Remove the init_sets() function from "setdef0.c", and its call from
"machdep.c".  Since "gensetdefs.c" calculates the length of each
set, it is no longer necessary in an ELF kernel to count the set
elements at kernel initialization time.  Also remove "set_of_sets"
which was used for this purpose.

Link "setdef0" and "setdef1" into the kernel only if building for
ELF.  Since init_sets() is no longer used, there is no need to link
them into an a.out kernel.
1997-05-21 23:21:30 +00:00
John Polstra
5851a3655a Fill out the ELF header files to make them more or less complete.
Fix a macro name that was misspelled both in brandelf.c and
imgact_elf.h.
1997-05-21 23:07:31 +00:00
John Polstra
713da3ed8b Make setbits() SMP-safe. Eliminate the SETBITS() macro, and replace
all uses of it with the equivalent calls to setbits().

This change incidentally eliminates a problem building ELF kernels
that was caused by SETBITS.

Reviewed by:	fsmp, peter
Submitted by:	bde
1997-05-21 22:56:05 +00:00
KATO Takenori
0f5ccb66e4 Recognize AMD 486 CPUs. 1997-05-19 12:41:35 +00:00
Tor Egge
7783c29bb1 Ignore the supplied nfs_diskless structure from the bootstrap loader
if we want to use NFS v3 to mount root and swap.
1997-05-15 19:12:56 +00:00
Tor Egge
432aad0e98 Bring in some kernel bootp support. This removes the need for netboot
to fill in the nfs_diskless structure, at the cost of some kernel
bloat. The advantage is that this code works on a wider range of
network adapters than netboot. Several new kernel options are
documented in LINT.
Obtained from: parts of the code comes from NetBSD.
1997-05-11 18:05:39 +00:00
Bruce Evans
b8dbeb6b4d Fixed initialization of ldt[]. Unused entries were garbage. A comment
was stale.

Fixed initialization of gdt[] for the BDE_DEBUGGER case.  APM entries
clobbered debugger entries if the debugger was loaded (APM is incompatible
with BDE_DEBUGGER) and unused entries were garbage if the debugger wasn't
loaded.
1997-05-11 12:39:43 +00:00
Bruce Evans
1cbeae88a4 Cleaned up #includes. Lite2 cleaned up <sys/mount.h> so no kludges
are required for NFS now.

Ifdefed SMP #defines.
1997-05-10 08:01:13 +00:00
Steve Passe
c2855f6e47 fix bug in get_isa_apic_mask() where EISA bus was ignored.
Submitted by:	 Peter Wemm <peter@spinner.DIALix.COM>
1997-05-07 22:25:27 +00:00
Peter Wemm
d021fc112b Don't allow access to illegal addresses in /dev/kmem to panic kernel
(eg: above 0xffc00000).  Programs using /dev/kmem are implicitly racing
the kernel, and can get right up high in memory.  I've been running
these for some time now, but with printfs.  It's saved two panics at
least that I can remember.
1997-05-07 20:32:41 +00:00
Peter Wemm
1f8745a9c3 clean up forked child creation. This is simplified also by having
md_regs being struct trapframe *.  Do a npxsave() if needed and copy the
pcb rather than use the increasingly defunct savectx().  Copy %edi and
%ebp explicitly.

Submitted by: bde

XXX npxproc could be declared in npx.h so the externs with smp fruit
are not needed.
1997-05-07 20:19:18 +00:00
Peter Wemm
914970e6e9 md_regs is struct trapframe * now, rather than int []
Remove TF_REGP() macro and use.  The original reason (address space
problems due to having UPAGES in mapped into user space) is gone.  It
looks cleaner without it.
1997-05-07 20:12:47 +00:00
Peter Wemm
835834c085 md_regs is now a struct trapframe * 1997-05-07 20:08:53 +00:00
Peter Wemm
8359d00f20 forgotten comment 1997-05-07 20:07:25 +00:00
Peter Wemm
36428e6100 simplify IOPL gain/remove privs code. It's easier with md_regs
being a trapframe.
1997-05-07 20:02:38 +00:00
Peter Wemm
06884fd04e remove now redundant (struct trapframe *) cast 1997-05-07 19:58:13 +00:00
Peter Wemm
6f486a5552 Convert md_regs from an int[] to a struct trapframe *. It simplifies
some code.
1997-05-07 19:55:13 +00:00
Peter Wemm
2263dd148e remove #include "opt_smp.h"
remove declarations for the SMPcurproc[NCPU] etc arrays. There was no
need to mention NCPU there, and they've been moved to their normal home.
1997-05-07 19:53:20 +00:00
Peter Wemm
f40e607832 remove #include "opt_smp.h" and <machine/smp.h>. Slightly elaborate on
a comment.
1997-05-07 19:51:59 +00:00
Peter Wemm
503c887bae remove #include opt_smp.h
declare SMPcurpcb[] next to #define and uniprocessor counterpart
1997-05-07 19:49:32 +00:00
Steve Passe
f258030f39 Force user to config SMP kernel with "options APIC_IO".
Reviewed by:	Peter Wemm <peter@spinner.DIALix.COM>
1997-05-06 21:29:57 +00:00
Steve Passe
2479ac60b9 Code to handle SMP/APIC_IO mapping of ISA INTs to APIC pins above IRQ15.
- doesn't break my system.
 - NOT yet verified on the affected motherboard.

Submitted by:	"John S. Dyson" <toor@dyson.iquest.net>
1997-05-05 22:56:37 +00:00
Steve Passe
08896efb1a Code to handle SMP/APIC_IO mapping of ISA INTs to APIC pins above IRQ15.
- doesn't break my system.
 - NOT yet verified on the affected motherboard.

Stifle an annoying dma_start busy message for the sound cards.

Submitted by:	"John S. Dyson" <toor@dyson.iquest.net>
1997-05-05 22:56:13 +00:00
KATO Takenori
7a13a66696 Use MediaGX' instead of Gx86'. 1997-05-05 14:30:00 +00:00
KATO Takenori
a74ff881b7 Use M2' instead of 6x86 with MMX'. Cyrix seems to use `M2' officially. 1997-05-05 14:11:09 +00:00
Peter Wemm
f435322e07 correct the order of the variables
use #ifdef where possible instead of #if defined

Submitted by: the KNF police, ie: bde :-)
1997-05-05 09:34:33 +00:00
John Dyson
b332d9a66e Make sure that *fork() always returns with %edx == 1 in the
child.  This was sometimes not happening correctly during my
threads code work.
1997-05-05 04:08:12 +00:00
Joerg Wunsch
5a9714de76 This mega-commit brings the following:
. It makes cd9660 root f/s working again.
. It makes CD9660 a new-style option.
. It adds support to mount an ISO9660 multi-session CD-ROM as the root
  filesystem (the last session actually, but that's what is expected
  behaviour).

Sigh.  The CDIOREADTOCENTRYS did a copyout() of its own, and thus has
been unusable for me for this work.  Too bad it didn't simply stuff
the max 100 entries into the struct ioc_read_toc_entry, but relied on
a user supplied data buffer instead. :-(  I now had to reinvent the
wheel, and created a CDIOREADTOCENTRY ioctl command that can be used
in a kernel context.

While doing this, i noticed the following bogosities in existing CD-ROM
drivers:

wcd:	This driver is likely to be totally bogus when someone tries
	two succeeding CDIOREADTOCENTRYS (or now CDIOREADTOCENTRY)
	commands with requesting MSF format, since it apparently
	operates on an internal table.

scd:	This driver apparently returns just a single TOC entry only for
	the CDIOREADTOCENTRYS command.

I have only been able to test the CDIOREADTOCENTRY command with the
cd(4) driver.  I hereby request the respective maintainers of the
other CD-ROM drivers to verify my code for their driver.  When it
comes to merging this CD-ROM multisession stuff into RELENG_2_2 i will
only consider drivers where i've got a confirmation that it actually
works.
1997-05-04 15:24:23 +00:00
Peter Wemm
26e5316524 Don't remove i586_ctr_freq from scope, leave it defined as zero. This
simplifies some assumptions and stops some code compile problems.

This should fix the compile hiccup in PR#3491, but smp kernel profiling
isn't likely to be fixed by this.
1997-05-04 14:25:00 +00:00
Steve Passe
004cb62334 added declaration for get_isa_apic_mask().
Submitted by:	"John S. Dyson" <toor@dyson.iquest.net>
1997-05-03 18:05:31 +00:00
Steve Passe
462e62c9a0 new function to turn an APIC pin# into an INT mask.
added missing APIC_IO define.

Submitted by:	"John S. Dyson" <toor@dyson.iquest.net>
1997-05-03 17:42:01 +00:00
Steve Passe
a1b7127157 cleaned up FAST_IPI code.
- one-liners all become inline.
 - multi-liners become functions.
 - FAST_IPI defines go away.

re-worked APICIPI_BANDAID code.
 - now refered to as DETECT_DEADLOCK.
 - on by default.
1997-05-01 19:33:12 +00:00
Steve Passe
f3a946e800 fixed spelling error.
Submitted by:	Bruce Albrecht <bruce@zuhause.mn.org>
1997-05-01 19:27:58 +00:00
Steve Passe
dff5c18abc changed expect_lock() to try_lock(), the real name used in mplock.s 1997-04-30 19:04:26 +00:00
Steve Passe
04964d153d Enabled 'FIX_MP_TABLE_WORKS' code.
This code re-numbers PCI busses in the MP table to match PCI semantics
when the MP BIOS fails to do it properly.

Reviewed by:	Peter Wemm <peter@spinner.DIALix.COM>
1997-04-29 22:12:32 +00:00
Peter Wemm
176c49e057 Use a common numbering of the tty and net software interrupt levels
between the SMP and non-SMP case.  It simplifies the #ifdef's, since
NHWI changes (at least for the moment) when APIC's are involved.
1997-04-29 20:05:48 +00:00
Steve Passe
7b2a188c7a cleaned out an old FIXME. 1997-04-28 08:39:48 +00:00
Steve Passe
f50a491f78 removed TEST_CPUHITS code.
replaced push/pop of %ds with use of 'ss' prefix in Xinvltlb.

Submitted by:	 Bruce Evans <bde@zeta.org.au>
1997-04-28 01:47:55 +00:00
Steve Passe
34e63b4cd7 removed all the TEST_UPPERPRIO crud. 1997-04-28 01:08:47 +00:00
Steve Passe
2c5d02fff3 remove all the SMP_INVLTLB defines, making the code default for APIC_IO.
Reviewed by:	informal discussion with Peter Wemm <peter@spinner.DIALix.COM>
1997-04-28 00:25:00 +00:00
Steve Passe
296bffc9c0 informal discussion between Bruce Evans <bde@zeta.org.au>,
Peter Wemm <peter@spinner.DIALix.COM>, Steve Passe <smp@csn.net>

removed all the IPI_INTS code.
made the XFAST_IPI32 code default, renaming Xfastipi32 to Xinvltlb.
cleanup of i386/isa/isa_device.h to eliminate SMP dependancies:
  made the id_irq member of struct isa_device an u_int.
  made the id_drq member of struct isa_device an int.
  removed all other '#ifdefs' concerning SMP & APIC_IO.
removed SMP/APIC_IO dependancies from if_ze.c.
1997-04-27 21:18:59 +00:00
Steve Passe
2897614119 informal discussion between Bruce Evans <bde@zeta.org.au>,
Peter Wemm <peter@spinner.DIALix.COM>, Steve Passe <smp@csn.net>

removed all the IPI_INTS code.
made the XFAST_IPI32 code default, renaming Xfastipi32 to Xinvltlb.
1997-04-27 21:17:56 +00:00
Peter Wemm
a8a74574b2 Whoops.. We forgot to turn off the 4MB Virtual==Physical mapping at address
zero from bootstrap in the non-SMP case.

Noticed by: bde
1997-04-27 12:11:43 +00:00
Peter Wemm
db7df99ff1 Try and make these usermode safe, Steve beat me in finding these.. 1997-04-26 20:04:21 +00:00
Peter Wemm
73f4384dc1 Remove the curproc printing on trap/interrupt/etc. It's outlived it's
usefulness, and there were problems with it anyway.

Found by: bde
1997-04-26 19:12:03 +00:00
Peter Wemm
c9c20622ad Back out bogus code that slipped past my read of the pre-merge diff
(Problems noted by Bruce)
1997-04-26 18:59:42 +00:00
Peter Wemm
acc7657309 Fix some SMP merge bugs (from Bruce) -
#include out of order
pccard_configure() called twice
munged tab (existing problem made worse)
1997-04-26 18:57:34 +00:00
Peter Wemm
477a642cee Man the liferafts! Here comes the long awaited SMP -> -current merge!
There are various options documented in i386/conf/LINT, there is more to
come over the next few days.

The kernel should run pretty much "as before" without the options to
activate SMP mode.

There are a handful of known "loose ends" that need to be fixed, but
have been put off since the SMP kernel is in a moderately good condition
at the moment.

This commit is the result of the tinkering and testing over the last 14
months by many people.  A special thanks to Steve Passe for implementing
the APIC code!
1997-04-26 11:46:25 +00:00
KATO Takenori
9ca8226735 Add new cpu type, CPU_CY486DX, which shows Cyrix 486S/DX series CPUs,
and initialization routine for those CPUs.

Tested by:	Bob Bishop <rb@gid.co.uk>
1997-04-26 04:08:54 +00:00
Bruce Evans
a862685541 Fixed longstanding profiling bug. The frame pointer wasn't set up
for syscalls, so one frame was lost in backtraces from syscalls.
This is handled better in the kernel by using a different mcount
entry point for profiling before the frame pointer is set up.

Expand RCSID().

Use .p2align instead of the ambiguous .align.

Added idempotency ifdef.

Removed unused macros ALTENTRY(), ALTASENTRY(), ASENTRY(), _MID_ENTRY.

Cleaned up formatting.

Reviewed by:	jdp reviewed an old version
Obtained from:	parts from NetBSD
1997-04-23 19:26:04 +00:00
John Polstra
9081eec1fb Make the necessary changes so that an ELF kernel can be built. I
have successfully built, booted, and run a number of different ELF
kernel configurations, including GENERIC.  LINT also builds and
links cleanly, though I have not tried to boot it.

The impact on developers is virtually nil, except for two things.
All linker sets that might possibly be present in the kernel must be
listed in "sys/i386/i386/setdefs.h".  And all C symbols that are
also referenced from assembly language code must be listed in
"sys/i386/include/asnames.h".  It so happens that failure to do
these things will have no impact on the a.out kernel.  But it will
break the build of the ELF kernel.

The ELF bootloader works, but it is not ready to commit quite yet.
1997-04-22 06:55:47 +00:00
Poul-Henning Kamp
a688c7b0ee Fix up the "hlt vector" change I made.
Reviewed by:	bde, bde, bde
1997-04-20 06:41:26 +00:00
KATO Takenori
e747d90dbf Don't disable CPU cache in init_486dlc. If BIOS supports Cyrix 486,
BIOS enables CPU cache and other registers.  If BIOS does not supports
it, CPU cache is disabled at reset time.

This commit closes PR/3292.

PR:		3292
1997-04-19 05:25:19 +00:00
KATO Takenori
03245f094d Use reset port before clearing page table in cpu_reset if PC98 is
defined.  Clearing page table could hang some new PC-98.
1997-04-16 12:11:37 +00:00
Bruce Evans
06e33296dd Only do indirections in ENTRY() if _ARCH_INDIRECT is defined. 1997-04-15 14:06:34 +00:00
Poul-Henning Kamp
3845d1185d Forget all about APM. Instead of "hlt" call through a vector which
APM can then fiddle with.  Default for the vector is to "htl; ret"
1997-04-14 18:12:05 +00:00
Bruce Evans
da3df630ac Use the same IOPL check as in syscons.
Reviewed by:	pst, joerg
1997-04-14 15:54:39 +00:00
Bruce Evans
58611a61ed Fixed printing of registers in dbflalt_handler(). The registers
were always in a tss; that tss just changed from the one in the
pcb to common_tss (who knows where it was when there was no curpcb?).
Not using the pcb also fixed the problem that there is no pcb in
idle(), so we now always get useful register values.
1997-04-14 13:52:52 +00:00
Justin T. Gibbs
c1aa7eb5f4 GENERIC, LINT:
Add an ie entry that corresponds to the location the old ix entry used
to probe and kill the ix entry.

files.i386:
Remove entries for the ix driver.
1997-04-14 00:35:25 +00:00
Bruce Evans
d12ee02d12 Don't forget to set `runtime' in fork_trampoline(). The time slice before
switching to a child for the first time was being counted twice.  I think
this only affected unimportant statistics.

Simplified arg handling in fork_trampoline().  splz() doesn't actually
smash the registers of interest.
1997-04-13 16:58:08 +00:00
John Dyson
f39aebddfc Decrease the amount of memory allocated for bouncing. This will
allow large systems to boot successfully with bounce buffers compiled
in.  We are now limiting bounce space to 512K.  The 8MB allocated for
a 512MB system is very bogus -- and that is now fixed.
1997-04-13 04:07:24 +00:00
John Dyson
aec17d5078 The pmap code was too generous in the allocation of kva space for
the pv entries.  This problem has become obvious due to the increase
in the size of the pv entries.  We need to create a more intelligent
policy for pv entry management eventually.
Submitted by:	David Greenman <dg@freebsd.org>
1997-04-13 03:35:30 +00:00
John Dyson
5856e12e69 Fully implement vfork. Vfork is now much much faster than even our
fork. (On my machine, fork is about 240usecs, vfork is 78usecs.)

Implement rfork(!RFPROC !RFMEM), which allows a thread to divorce its memory
	from the other threads of a group.

Implement rfork(!RFPROC RFCFDG), which closes all file descriptors, eliminating
	possible existing shares with other threads/processes.

Implement rfork(!RFPROC RFFDG), which divorces the file descriptors for a
	thread from the rest of the group.

Fix the case where a thread does an exec.  It is almost nonsense for a thread
	to modify the other threads address space by an exec, so we
	now automatically divorce the address space before modifying it.
1997-04-13 01:48:35 +00:00
Stefan Eßer
5c03639065 Mask out revision register in consistency test of class register. 1997-04-09 11:34:50 +00:00
Stefan Eßer
6df09d1e0b Fix spelling of align and interrupt in comments. 1997-04-09 09:16:27 +00:00
Stefan Eßer
b4b8847934 Fix consistency test to not fail on pre PCI 2.0 motherboards 1997-04-09 09:15:03 +00:00
Peter Wemm
e2d8771131 Lower the spl() of the new process from splhigh() right away, since
nothing else will lower it until either much later, or never(?) for
kernel processes.

This basically re-fixes what Bruce fixed in rev 1.29 of kern_fork.c,
which was broken again now the child does not execute back up the fork()
calling tree.
1997-04-07 11:42:09 +00:00
Peter Wemm
a0c3795f19 Use UPAGES_HOLE instead of UPAGES in case it's changed some time.
Rename the PT* index KSTK* #defines to UMAX*, since we don't have a kernel
stack there any more..

These are used to calculate VM_MAXUSER_ADDRESS and USRSTACK, and really
do not want to be changed with UPAGES since BSD/OS 2.x binary compatability
depends on it.
1997-04-07 09:30:22 +00:00
Peter Wemm
e8fa13fdd9 Clean up some dead wood. Kill the page table page for mapping the
proc0/idlePTD/bootstrap stack into place in user space.  We save 4K.
Remove p0upa, it is now unneeded.
1997-04-07 08:38:19 +00:00
Peter Wemm
a2a1c95c10 The biggie: Get rid of the UPAGES from the top of the per-process address
space. (!)

Have each process use the kernel stack and pcb in the kvm space.  Since
the stacks are at a different address, we cannot copy the stack at fork()
and allow the child to return up through the function call tree to return
to user mode - create a new execution context and have the new process
begin executing from cpu_switch() and go to user mode directly.
In theory this should speed up fork a bit.

Context switch the tss_esp0 pointer in the common tss.  This is a lot
simpler since than swithching the gdt[GPROC0_SEL].sd.sd_base pointer
to each process's tss since the esp0 pointer is a 32 bit pointer, and the
sd_base setting is split into three different bit sections at non-aligned
boundaries and requires a lot of twiddling to reset.

The 8K of memory at the top of the process space is now empty, and unmapped
(and unmappable, it's higher than VM_MAXUSER_ADDRESS).

Simplity the pmap code to manage process contexts, we no longer have to
double map the UPAGES, this simplifies and should measuably speed up fork().

The following parts came from John Dyson:

Set PG_G on the UPAGES that are now in kernel context, and invalidate
them when swapping them out.

Move the upages object (upobj) from the vmspace to the proc structure.

Now that the UPAGES (pcb and kernel stack) are out of user space, make
rfork(..RFMEM..) do what was intended by sharing the vmspace
entirely via reference counting rather than simply inheriting the mappings.
1997-04-07 07:16:06 +00:00
Peter Wemm
271b264e4c No longer use an i386tss as the basis of our pcb - it wasn't particularly
convenient and makes life difficult for my next commit.  We still need
an i386tss to point to for the tss slot in the gdt, so we use a common
tss shared between all processes.

Note that this is going to break debugging until this series of commits
is finished.  core dumps will change again too. :-(  we really need
a more modern core dump format that doesn't depend on the pcb/upages.

This change makes VM86 mode harder, but the following commits will remove
a lot of constraints for the VM86 system, including the possibility of
extending the pcb for an IO port map etc.

Obtained from: bde
1997-04-07 06:45:18 +00:00
Stephen McKay
bc19f8a39e Prevent wedging of the stat clock because of missed interrupts.
This should cure the "alternate system clock has died!" problem.

Discussed with: bde, joerg
1997-04-06 13:25:48 +00:00
John Dyson
a04c970a7a Fix the gdb executable modify problem. Thanks to the detective work
by Alan Cox <alc@cs.rice.edu>, and his description of the problem.

The bug was primarily in procfs_mem, but the mistake likely happened
due to the lack of vm system support for the operation.  I added
better support for selective marking of page dirty flags so that
vm_map_pageable(wiring) will not cause this problem again.

The code in procfs_mem is now less bogus (but maybe still a little
so.)
1997-04-06 02:29:45 +00:00
Bruce Evans
12f2987754 Removed a wrong comment of mine.
Removed unused #includes.
1997-04-01 16:22:31 +00:00
David Greenman
9caaadb63a Changed the way that the exec image header is read to be filesystem-
centric rather than VM-centric to fix a problem with errors not being
detectable when the header is read.
Killed exech_map as a result of these changes.
There appears to be no performance difference with this change.
1997-03-31 11:11:26 +00:00
Joerg Wunsch
514e9fd6b8 Implement the `detach' command for remote GDB. It gets you back at DDB. 1997-03-30 16:03:00 +00:00
Poul-Henning Kamp
3d4d8fe94d Sanitize APM a bit. Convert various #ifdef to id_flags instead.
You may want to add "flags 0x31" to apm0 if you have a lousy
implementation.  Read LINT.
1997-03-29 11:07:12 +00:00
Bruce Evans
83eab616cf Don't keep cpu interrupts enabled during the lookup in vm_page_zero_idle().
Lookup isn't done every time the system goes idle now, but it can still
take > 1800 instructions in the worst case, so if cpu interrupts are kept
disabled then it might lose 20 characters of sio input at 115200 bps.

Fixed style in vm_page_zero_idle().
1997-03-29 04:35:26 +00:00
Bruce Evans
b8fa61d129 Added a setjmp() and a longjmp() so that an unexpected trap inside
ddb isn't necessarily fatal.  You can now do silly things like
`call vprint' and `show map' without losing control.
1997-03-28 12:56:07 +00:00
Bruce Evans
b825df51c6 Backed out rev.1.5. if %cs is bad, %eip may be bad, but this is no longer
fatal.
1997-03-28 12:46:52 +00:00
Joerg Wunsch
403d7829ac Something long overdue: compile inb() and outb() into the kernel as
functions if DDB is available.  The remaining occurences are usually
only inlined and thus not available in DDB.

I'm sure Bruce will have 23 additions to these 30 lines of code, but
at least it's a starting point. ;-)
1997-03-28 12:37:44 +00:00
Andrey A. Chernov
e5df661c83 Remove recently commited support for iobase == -2 ("port none")
is is really probe routine task (return -1 for no ports)
1997-03-28 01:02:17 +00:00
Mike Pritchard
89b37cfe4b Change sigreturn() to return EFAULT if it is passed an
address outside of the process's address space.
Now it matches its man page :-).  Closes PR# 2682.

Discussed with: bde
Submitted by:	Jonathan Lemon <jlemon@americantv.com>
1997-03-25 23:43:01 +00:00
Andrey A. Chernov
e4960ae4f5 Replace more verbose "at <not configured>" with less verbose "at ?",
we don't need much attention here, because this diagnostic printed first
and then card will be configured.
1997-03-25 03:29:40 +00:00
Andrey A. Chernov
70b57d05df Follow config intention for iobase:
print "at <not configured>" for iobase == -1 (autodetect not happens)
and not print anything for iobase == -2 (none)
Old code treat this two special config numbers as big port numbers.
1997-03-25 03:13:05 +00:00
Bruce Evans
fce002fdef Don't include <sys/ioctl.h> in the kernel. Stage 1: don't include
it when it is not used.  In most cases, the reasons for including it
went away when the special ioctl headers became self-sufficient.
1997-03-24 11:25:10 +00:00
KATO Takenori
5fa4a05818 Fix typo.
Submitted by:	Bruce Evans <bde@zeta.org.au>
1997-03-24 07:23:05 +00:00
KATO Takenori
a8e282d6c3 Oops, I forgot to `cvs add'. This file is a part of new CPU
identification and initialization routines.
1997-03-22 19:00:36 +00:00
KATO Takenori
4c024bbdf8 Improved CPU identification and initialization routines. This
supports All Cyrix CPUs, IBM Blue Lightning CPU and NexGen (now AMD)
Nx586 CPU, and initialize special registers of Cyrix CPU and msr of
IBM Blue Lightning CPU.

If revision of Cyrix 6x86 CPU < 2.7, CPU cache is enabled in
write-through mode.  This can be disabled by kernel configuration
options.

Reviewed by:	Bruce Evans <bde@freebsd.org> and
            	Jordan K. Hubbard <jkh@freebsd.org>
1997-03-22 18:54:54 +00:00
John Dyson
8e56e56134 Decrease the latency/overhead in the prezero code when there is
an adequate number of prezeroed pages.
1997-03-22 04:28:16 +00:00
Bruce Evans
a92a5c234e Quoted CMD640. It's still missing from options.i386.
Removed stale comment saying that npx0 is mandatory.
1997-03-13 19:03:58 +00:00
Stefan Eßer
09d5def9ce Activate CMD640 workaround 1997-03-12 19:59:58 +00:00
Bruce Evans
13a44161a2 Moved userland assembler macros from <machine/asmacros.h> to
<machine/asm.h>.
1997-03-09 13:57:33 +00:00
Bruce Evans
644ba7e84e Cloned src/lib/libc/i386/DEFS.h to create <machine/asm.h> for the i386.
The former file was too hard to get at from other parts of the src tree
and will go away.
1997-03-09 10:39:15 +00:00
Stefan Eßer
81cf5d7aae improve pcibus_check: Only assume PCI if at least one PCI to anything bridge
on bus 0.
This fixes problems with EISA-only systems mistakenly being assumed to support PCI.
1997-03-05 20:52:00 +00:00
Bruce Evans
a5c1768dd5 Made FPU stuff conditional on npx as well as I586_CPU. 1997-03-05 16:30:55 +00:00
Bruce Evans
65ff42dd17 Only print clock calibration messages if the system was booted with -v.
Submitted by:	partly by gpalmer
1997-03-05 08:08:48 +00:00
Gary Palmer
0b146b65d2 Back out the patch to break up the clock probe lines. Instead, follow
Bruce's suggestion of deleting "relative to mc146818A clock ",
thus shortening the line ...
1997-03-05 00:54:00 +00:00
Gary Palmer
5c5e8d766c Split the rather long and line-wrapping clock probe messages on boot.
(2.2?)

Submitted by:	Mathew Dood <winter@jurai.net>
1997-03-04 09:24:01 +00:00
Andrey A. Chernov
50ac8e2f59 Add missing #include <machine/segments.h> for ISPL and SEL_UPL macros 1997-03-01 05:44:09 +00:00
Bruce Evans
9bb932b6f2 Print function args in the current radix instead of always in hex.
Print the stack pointer together with the frame pointer in the trap,
syscall and interrupt messages.  The frame pointer is not very useful
for locating syscall args since syscall functions don't have a frame
pointer.

Print all the numbers in the trap, syscall and interrupt messages in
the default radix.  The syscall number was confusing because it was
printed in decimal.

Use %#n format more and 0x%x less.  0x%x of course doesn't work with
a variable radix.  ddb is now fairly consistent about using %+#n to
print all numbers.  It omits the '+' for signed numbers the '#' in a
few cases (e.g., for function args) to save space.
1997-02-28 12:36:18 +00:00
Bruce Evans
014e652753 Fixed the gcc ellipsis change to work with gcc-1.x. 1997-02-28 07:12:34 +00:00
Alexander Langer
a28b3400eb Typo police. 1997-02-24 00:37:43 +00:00
Peter Wemm
6875d25465 Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not
ready for it yet.
1997-02-22 09:48:43 +00:00
Bruce Evans
f79ef55e7a Replaced START_ENTRY by _START_ENTRY. -current hasn't got my cleanup
of DEFS.h which renamed it.
1997-02-17 07:21:28 +00:00
Bruce Evans
dab159e3d6 Select between the generic math functions and the i387-specific ones
at runtime.

etc/make.conf:
Nuked HAVE_FPU option.

lib/msun/Makefile:
Always build the i387 objects.  Copy the i387 source files at build
time so that the i387 objects have different names.  This is simpler
than renaming the files in the cvs repository or repeating half of
bsd.lib.mk to add explicit rules.

lib/msun/src/*.c:
Renamed all functions that have an i387-specific version by adding
`__generic_' to their names.

lib/msun/src/get_hw_float.c:
New file for getting machdep.hw_float from the kernel.

sys/i386/include/asmacros.h:
Abuse the ENTRY() macro to generate jump vectors and associated code.
This works much like PIC PLT dynamic initialization.  The PIC case is
messy.  The old i387 entry points are renamed.  Renaming is easier
here because the names are given by macro expansions.
1997-02-16 18:26:31 +00:00
Bruce Evans
a7d00b5bf6 Moved definition of FUNCTION_ALIGNMENT to a machine-dependent place.
Changed it from 4 to 16 for i386's.  It can be anything for i386's,
but compiler options limit it to a power of 2, and assembler and
linker deficiencies limit it to a small power of 2 (<= 16).
We use 16 in the kernel to get smaller tables (see Makefile.i386 and
<machine/asmacros.h>).  We still use the default of 4 in user mode.

Use HISTCOUNTER instead of (*kcount) in the definition of KCOUNT()
for consistency with other macros.
1997-02-13 10:47:29 +00:00
Bruce Evans
47cac30b9a Align text to 16-byte boundaries if profiling is enabled. This will
allow a fourfold reduction in the size of the profiling buffers.  This
goes with rev.1.91 of Makefile.i386 which does the same thing for C
functions.
1997-02-13 08:31:53 +00:00
Bruce Evans
3d1713a8a5 Restored changes from rev.1.58-1.60 which were blown away by the
previous commit.
1997-02-11 15:03:31 +00:00
John Dyson
996c772f58 This is the kernel Lite/2 commit. There are some requisite userland
changes, so don't expect to be able to run the kernel as-is (very well)
without the appropriate Lite/2 userland changes.

The system boots and can mount UFS filesystems.

Untested: ext2fs, msdosfs, NFS
Known problems: Incorrect Berkeley ID strings in some files.
		Mount_std mounts will not work until the getfsent
		library routine is changed.

Reviewed by:	various people
Submitted by:	Jeffery Hsu <hsu@freebsd.org>
1997-02-10 02:22:35 +00:00
Poul-Henning Kamp
b7a652ab84 I have no idea what this is all about, but it works and Bruce hasn't
complained so it cannot be entirely bad :-)

I include the email that probably explains it for people who already know:

> >Compiling with -O3 inlines functions.  However the function that is being
> >inlined in makeinfo.c (add_word_args()) is a vararg function and must not be
> >inlined.
> >
> >The code in question is K&R style, and AFIK, there is no way for the compiler
> >to determine that the function uses vararg.  Either change the code to use
> >prototypes, or use stdarg, or add a directive to prevent inlining.
>
> Not declaring a varargs function as varargs before it is used gives
> undefined behaviour.
>
> However, in practice the bug is probably in FreeBSD's <varargs.h>, which
> doesn't use gcc's __builtin_next_arg().  gcc should notice that it is
> used and not inline functions that have it.  <stdarg.h.> uses it, but I
> think there's another gcc builtin that it should be using.

Patch attached.  The ellipsis causes gcc to flag this as a varargs function,
and the name "__builtin_va_alist" is special cased in gcc to hide the last
argument in the arglist.

Reviewed by:	bde & phk
Submitted by:	jlemon@americantv.com (Jonathan Lemon)
1997-02-07 20:22:15 +00:00
KATO Takenori
d5605f2a31 Deleted i386_cpus[]. i386_cpus[] is a static variable in identcpu.c.
Found-by: lint
1997-02-02 10:43:35 +00:00
David Greenman
e4c46b5e82 Removed PG_N from here, too. Some machines don't like it and it's unnecessary. 1997-01-30 20:22:02 +00:00
David Greenman
3def491346 Removed unnecessary PG_N flag from device memory mappings. This is handled
by the CPU/chipset already and was apparantly triggering a hardware bug that
causes strange parity errors.
1997-01-30 19:36:58 +00:00
Bruce Evans
49a116737e Estimate an initial overhead of 0 usec instead of 20 usec in DELAY().
I have code to calibrate the overhead fairly accurately, but there
is little point in using it since it is most accurate on machines
where an estimate of 0 works well.  On slow machines, the accuracy
of DELAY() has a large variance since it is limited by the resolution
of getit() even if the initial delay is calibrated perfectly.

Use fixed point and long longs to speed up scaling in DELAY().
The old method slowed down a lot when the frequency became variable.
Assume the default frequency for short delays so that the fixed
point calculation can be exact.

Fast scaling is only important for small delays.  Scaling is done
after looking at the counter and outside the loop, so it doesn't
decrease accuracy or resolution provided it completes before the
delay is up.  The comment in the code is still confused about this.
1997-01-29 22:51:44 +00:00
Bruce Evans
26add14927 Disabled logging of masked exceptions on exit. Keep the side effect of
saving the state (see rev.1.17).
1997-01-29 13:46:28 +00:00
Bruce Evans
4123678332 Sync with <pci/pcibus.h>. pcibus.c unfortunately still compiled (with
only 3 or 4 warnings) when pb_maxirq went away.
1997-01-25 18:51:01 +00:00
Bruce Evans
f42cf36fa8 Fixed some formatting bugs (mostly regressions in rev.1.48). Replaced
some magic numbers by pmap constants.  Cosmetic.
1997-01-24 20:37:57 +00:00
Bruce Evans
d9cca175bc Initialize CR0_MP in setregs() in case npx0 is disabled or not configured.
Disabling npx0 works right now.

Don't reference `npxdriver' if npx0 is not configured.  Not configuring
npx0 doesn't quite work yet.

Don't clear potential non-npx pcb flags in setregs().
1997-01-24 19:01:54 +00:00
David E. O'Brien
8819cbef39 KNF style police.
Reported by:	Bruce
Thanks to:	Bruce for also providing a diff.
1997-01-24 12:39:11 +00:00
John Dyson
7e64cb7a96 Remove some dead code from trapwrite.
Submitted by:	Stephen McKay <syssgm@devetir.qld.gov.au>
1997-01-23 01:30:59 +00:00
John Dyson
8130eff80a Fix I386 copyout support. The new page-table management code will
not lazy-fault page table pages.  Update the copyout support to take
that into account.  This should fix some segfault problems on such
machines.

After a short test period, we'll move this into 2.2.

Submitted by:	Stephen McKay <syssgm@devetir.qld.gov.au>
1997-01-22 06:15:27 +00:00
David E. O'Brien
bcd60335fc Add bits to identify AMD K5 and K6 cpu's.
Tested only on my AMD K5 PR-133.  Bit values for K6 taken from AMD document
on how to test such things.

2.2 Candidate.
1997-01-19 01:56:55 +00:00
Jordan K. Hubbard
0942673f33 Adjust ex0 entries properly after talking with Javier. 1997-01-17 14:19:04 +00:00
Bruce Evans
6bed7e5140 Guard against the i8254 timer being uninitialzed if DELAY() is
called early for console i/o.  The timer is usually in BIOS mode
if it isn't explicitly initialized.  Then it counts twice as fast
and has a max count of 65535 instead of 11932.  The larger count
tended to cause infinite loops for delays of > 20 us.  Such delays
are rare.  For syscons and kbdio, DELAY() is only called early
enough to matter for ddb input after booting with -d, and the delay
is too small to matter (and too small to be correct) except in the
PC98 case.  For pcvt, DELAY() is not used for small delays (pcvt
uses its own broken routine instead of the standard broken one),
but some versions call DELAY() with a large arg when they unnecessarily
initialize the keyboard for doing console output.  The problem is
more serious for pcvt because there is always some early console
output.

Guard against the i8254 timer being partially or incorrectly
initialized.  This would have prevented the endless loop.

Should be in 2.2.
1997-01-16 18:28:20 +00:00
Jordan K. Hubbard
3b20426160 Add the ex driver (Intel EtherExpress Pro/10).
I have no idea if this works since I don't have one of the cards to test.
I also don't know what the LINT and GENERIC entries should look like,
so I just made up some values for now and left them commented out.
Someone who knows the factory settings for a Pro/10, please contact me!

Submitted-By: Javier Martín Rueda <jmrueda@diatel.upm.es>
1997-01-16 12:19:21 +00:00
Bruce Evans
7d350e7256 Fixed printing of small offsets. E.g., -4(%ebp) is now printed
as -0x4(%ebp) instead of as _APTD+0xffc(%ebp), and if GUPROF is
defined, 8(%ebp) is now printed as 0x8(%ebp) instead of as
GMON_PROF_HIRES+0x4(%ebp).
1997-01-16 11:27:11 +00:00
David Greenman
649c409d03 Fix bug related to map entry allocations where a sleep might be attempted
when allocating memory for network buffers at interrupt time. This is due
to inadequate checking for the new mcl_map. Fixed by merging mb_map and
mcl_map into a single mb_map.

Reviewed by:	wollman
1997-01-15 20:46:02 +00:00
Bruce Evans
e0611bb287 Fixed longstanding annoying warning about a type mismatch. pmap doesn't
really uses pt_entry_t internally, so don't use it here.

Fixed range checking for writing.  The partial page (if any) following
etext wasn't writable.
1997-01-15 19:24:12 +00:00
Jordan K. Hubbard
1130b656e5 Make the long-awaited change from $Id$ to $FreeBSD$
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore.  This update would have been
insane otherwise.
1997-01-14 07:20:47 +00:00
John Dyson
b447ce90f5 When we changed pmap_protect to support adding the writeable
attribute to a page range, we forgot to set the PG_WRITEABLE
flag in the vm_page_t.  This fixes that problem.
1997-01-11 23:50:42 +00:00
Nate Williams
796c9a39d8 Moved pccard_configure() to the end of the configure() list. This
avoids problems with the PCIC controller grabbing an interrupt that
another card needs.

Closes PR: kernel/2405

Reviewed by:	bde
1997-01-11 17:41:36 +00:00
John Dyson
9b5a5d81be Prepare better for multi-platform by eliminating another required
pmap routine (pmap_is_referenced.)  Upper level recoded to use
pmap_ts_referenced.
1997-01-11 07:19:02 +00:00
KATO Takenori
af4342c037 Staticize the functions rtc_inb, rtc_outb, rtc_serialcombit, and
rtc_serialcom.  These functions are only used by PC98.
1997-01-10 17:11:09 +00:00
Nate Williams
62ce633d36 Make the code more consistant by using the INTR*MASK macros througout the
code.

Reviewed by:	bde

[
Bruce suggest removing the macros completely, but I'm not up to that
task quite yet.
]
1997-01-08 16:12:56 +00:00
Nate Williams
7323d74ac0 Changed magic # 0xa0000 -> ISA_HOLE_START since it's now defined. 1997-01-08 05:56:55 +00:00
Bruce Evans
639cfb9f88 Reenabled i586_optimized_copyin/out yet again. 1997-01-04 13:57:17 +00:00
Bruce Evans
363e4cc182 Fixed context switching of FPU state after a fault in
i586_optimized_copyin/out.
1997-01-04 13:56:18 +00:00
Bruce Evans
ab372207b2 Fixed botched tables:
- the operands for bt, bts, arpl and `enter' were reversed.
- btr was reported as bts (with the correct operand order).
- cmpxchg was misplaced.  It was misplaced differently in the
  comments.  It is misplaced differently again in the i486 manual.
  I put it where the i586 manual and gas say it is.
- fucompp was misplaced.
- the rr table for(s) some versions of fstp, fcom and fcomp was non-null.
  This caused some invalid opcodes to be reported as "" instead of as
  "<bad instruction>".
- the word and long versions of the fi* instructions were reversed.
- aaa and daa were reversed.

Fixed bugs involving unusual operand sizes:
- 32-bit registers weren't always forced for bswap or for moves to and
  from special registers.
- the operand sizes weren't reported for [l]call or [l]jmp.
- displacements weren't truncated mod 2^16 when the operand size was
  16-bit.
- too-large displacements and offsets were fetched, and too-large
  offsets were reported, when the operand size was 16-bit.
- sign extended immediate bytes were extended too far when the operand
  size was 16-bit.

Fixed bugs involving usual operand sizes:
- 8-bit source registers weren't forced for mov[sz]b[wl].
- 16-bit source registers weren't forced for mov[sz]w[wl].
- immediate bytes were sometimes reported as sign extended even for
  byte operations.  Same for immediate words in word operations.
- the immediate byte was not reported as sign extended for `push'.

Finished Pentium support:
- cpuid, cmpxchg8b and rsm were missing.

Finished i287 support:
- fneni, fndisi and fsetpm were missing.  These are harmless nops on
  later FPUs.

Improvements:
- report invalid opcodes 0xd6 and 0xf1 using .byte.  They are special
  in not causing invalid operand exceptions when executed.
- report the immediate byte for unusual aam and aad instuctions.
  Immediate bytes other than 0x0a always worked and are documented to
  work on Pentiums.
1997-01-04 13:47:30 +00:00
Stefan Eßer
8c39a12760 Add code to copy the LDT, if required.
This code was sent to me by Bruce Evans, and seems to fix some
possible kernel panic in case of an execution error. It did not
cause any problems on my system, but I did never observe the
problem this patch is supposed to fix, anyway.

This patch is a NOP, unless the kernel is built with "options
USER_LDT", and doesn't affect the GENERIC kernel for this reason.

I want to have it in 2.2: it fixes a bug ...

Submitted by:	bde
1997-01-02 01:43:09 +00:00
John Dyson
d0aea04fe0 Let the VM system know that on certain arch's that VM_PROT_READ
also implies VM_PROT_EXEC.  We support it that way for now,
since the break system call by default gives VM_PROT_ALL.  Now
we have a better chance of coalesing map entries when mixing
mmap/break type operations.  This was contributing to excessive
numbers of map entries on the modula-3 runtime system.  The
problem is still not "solved", but the situation makes more
sense.

Eventually, when we work on architectures where VM_PROT_READ
is orthogonal to VM_PROT_EXEC, we will have to visit this
issue carefully (esp. regarding security issues.)
1996-12-30 05:31:21 +00:00
John Dyson
5e0c727879 Superficial clean-up of useracc calls. (The useracc usage of
B_READ/B_WRITE is bogus anyway.)  Might as well make the call prettier
anyway.
1996-12-29 02:29:41 +00:00
John Dyson
f486bc1d64 Allow pmap_protect to increase permissions. This mod can eliminate
the need for unnecessary vm_faults.
Submitted by:	Alan Cox <alc@cs.rice.edu>
1996-12-29 02:27:07 +00:00
Bruce Evans
5a9c69e7af Disabled i586-optimized copyin and copyout again. The fault handler
is still broken - it doesn't restore the floating point state.

2.2-BETA users should disable it using npx0 flags 0x04 the same as
2.2-ALPHA users should have.
1996-12-28 12:19:25 +00:00
Poul-Henning Kamp
544d046f79 Give MFS_ROOT priority over NFS as root filesystem.
2.2 candidate.
1996-12-21 16:43:35 +00:00
Stefan Eßer
56ecc3824a Mention amd driver in comment regarding PCI drivers. 1996-12-21 02:09:04 +00:00
Bruce Evans
959c02787e Only handle copyin/out/etc faults when not in an interrupt handler.
This makes unexpected faults (in an interrupt handler) more likely
to crash properly.  It could be done even better (more robustly and
more efficiently) using lazy fault handling.
1996-12-18 19:12:01 +00:00
Bruce Evans
115abf2097 Fixed formatting of KERN_DUMPDEV.
Should be in 2.2.
1996-12-18 18:53:00 +00:00
Bruce Evans
db7e362115 Moved the printing of the BIOS geometries from cpu_startup() into
configure() where it always belonged.  It was originally slightly
misplaced after configure().  Rev.138 left it completely misplaced
before the DEVFS, DRIVERS and CONFIGURE sysinits by not moving it
together with configure().

Restored the printing of bootinfo.bi_n_bios_used now that it can
be nonzero.
1996-12-18 15:03:10 +00:00
Stefan Eßer
f8fc022510 Add driver for AMD 53c974 SCSI (Tekram DC390/390T).
Remove MAX_LUN=2 option for NCR driver: FAILSAFE does
no longer imply MAX_LUN=1.
1996-12-18 01:30:19 +00:00
David Greenman
fee444b87b Fix nbuf calculation /4 -> /8. 2.2 already has it this way.
Reviewed by:	dyson
1996-12-17 04:19:41 +00:00
Stefan Eßer
b88a895923 Remove "options MAXLUN=2" since the ncr driver will probe for 8 LUNs
now anyway, even if compiled with FAILSAFE defined.
1996-12-15 16:31:18 +00:00
Jordan K. Hubbard
c40e48ec21 Make the USERCONFIG_BOOT semantics closer to what was original
intended.
1996-12-14 22:18:43 +00:00
Jordan K. Hubbard
0b3870cb60 Close PR#2198:
I've added an installation from optical disk drive facility.
	This enables FreeBSD to be installed from an optical disk, which
	may be formatted in "super floppy" style or sliced into MSDOS-FS
	and UFS partitions.

	Note:  ncr.c should be reviewed by Stefan Esser <se@freebsd.org>
	and cd.c by Joerg Wunsch <joerg@freebsd.org> before bringing this
	into 2.2.

Submitted-By: Shunsuke Akiyama <akiyama@kme.mei.co.jp>
1996-12-13 07:55:14 +00:00
Steven Wallace
8bb9c4c7ea Soften range-check for LDTs.
Reviewed by:	bde
1996-12-12 17:57:50 +00:00
David Greenman
a7e4f840ca Fix allocation for exech_map to be 16*PAGE_SIZE rather than 32*PAGE_SIZE
so that it is scaled the same as exec_map (16 concurrent exec'ers).
1996-12-12 04:20:50 +00:00
John Dyson
ab608804ed One minor mod to set the limit of nbufs to 2048 from 1536. More important
fix to exech_map, it used 32*ARG_MAX, and it should use 32*PAGE_SIZE.
1996-12-11 05:52:15 +00:00
John Dyson
3596818baa Clean-up of the new buffer kva allocation code. Also, there was an
error in the !BOUNCE_BUFFERS case.
1996-12-05 04:28:52 +00:00
Bruce Evans
4eb73cdaff Removed all references to b_cylinder (aka b_cylin). It was evil and
hasn't been used for a year or two since disksort() started sorting
on b_pblkno.
1996-12-01 16:34:41 +00:00
John Dyson
621d520e2f Fix a problem with the new buffer_map management code. Additionally,
decrease the size of buffer_map to approx 2/3 of what it used to be
(buffer_map can be smaller now.)  The original commit of these changes
increased the size of buffer_map to the point where the system would
not boot on large systems -- now large systems with large caches will
have even less problems than before.
1996-12-01 15:46:40 +00:00
Bruce Evans
4cea724a81 Reenabled i586-optimized copyin/out.
Should be in 2.2.  Don't put it there for a while.
1996-11-30 14:08:44 +00:00
Bruce Evans
9dde46b7a0 Fixed EFAULT handling in i586_copyin() and i586_copyout(). Use a
consistent stack frame in fastmove() so that only one new fault handler
is necessary.

Should be in 2.2.  Harmless until the i586 versions are reenabled.
1996-11-29 14:32:30 +00:00
Bruce Evans
c827accd9a Don't print bootinfo.bi_n_bios_used in cpu_startup() since it is always
zero because no drivers have had a chance to change it.
1996-11-29 13:19:26 +00:00
Bruce Evans
388ddab632 Don't clobber the SIGCONT bit in the signal mask in sigreturn(). Use
the `sigcantmask' macro to get the correct set of unmaskable signals.

Found by: NIST-PCTS.
1996-11-29 13:12:14 +00:00
Poul-Henning Kamp
07c48e4bb0 Make a kernel with DDB but without sio possible again. This is only
a stopgap measure, a more complete solution is on somebodys whiteboard
(and we all know that THAT means :-).

Reviewed by:	pst
1996-11-25 18:39:25 +00:00
John Dyson
9970cd3721 Improve the caching of small files like directories, while not
substantially increasing buffer space.  Specifically, we double
the number of buffers, but allocate only half the amount of memory
per buffer.  Note that VDIR files aren't cached unless instantiated
in a buffer.  This will significantly improve caching.
1996-11-17 02:11:01 +00:00
Justin T. Gibbs
11b5ea7239 Since there have been so many reports of the Memory Mapped I/O to the
aic7xxx cards failing on certain motherboards, reverse the logic used to
control this feature.  AHC_FORCE_PIO is replaced with AHC_ALLOW_MEMIO.
GENERIC no longer needs to specify the AHC_FORCE_PIO option since this is
the default.
1996-11-16 01:09:20 +00:00
Bruce Evans
f020427513 Disabled i586-optimized copyin and copyout. They usually panic if the
user supplies a bad address, because they push a lot of stuff that the
fault handler doesn't know about onto the stack.  This has been broken
for more than half a year despite being tested for almost half a year
in -current.
1996-11-15 20:27:14 +00:00
Jordan K. Hubbard
e1d2ff9f44 Change this back to movl for -current since it seems to work there.
Bruce says that movl is broken in -stable, which would certainly explain
why this didn't work there.
1996-11-15 09:00:56 +00:00
Jordan K. Hubbard
6de3a3bb17 movl instruction should have been lea (this is why userconfig didn't
work in 2.1).

Spotted-by-the-keen-eyes-of: Don Lewis <Don.Lewis@tsc.tdk.com>
1996-11-14 15:55:21 +00:00
Bruce Evans
a8c33fd1e8 Removed another #include of opt_temporary.h.
YA2.2C.
1996-11-12 14:54:16 +00:00
Bruce Evans
3c10da63aa Removed #include of "opt_temporary.h". All the temporary options went
away, so this header is no longer generated.

This change should be in 2.2.  The old version shouldn;t have been in
2.2 (blush).
1996-11-12 13:36:52 +00:00
Bruce Evans
1fe048505d Replaced I586_OPTIMIZED_BCOPY and I586_OPTIMIZED_BZERO with boot-time
negative-logic flags (flags 0x01 and 0x02 for npx0, defaulting to unset = on).
This changes the default from off to on.  The options have been in current
for several months with no problems reported.

Added a boot-time negative-logic flag for the old I5886_FAST_BCOPY option
which went away too soon (flag 0x04 for npx0, defaulting to unset = on).

Added a boot-time way to set the memory size (iosiz in config, iosize in
userconfig for npx0).

LINT:
Removed old options.  Documented npx0's flags and iosiz.

options.i386:
Removed old options.

identcpu.c:
Don't set the function pointers here.  Setting them has to be delayed
until after userconfig has had a chance to disable them and until after
a good npx0 has been detected.

machdep.c:
Use npx0's iosize instead of MAXMEM if it is nonzero.

support.s:
Added vectors and glue code for copyin() and copyout().
Fixed ifdefs for i586_bzero().
Added ifdefs for i586_bcopy().

npx.c:
Set the function pointers here.
Clear hw_float when an npx exists but is too broken to use.
Restored style from a year or three ago in npxattach().
1996-11-11 20:39:03 +00:00
John Dyson
d22671dcce Support the PG_G flag on Pentium-Pro processors. This pretty
much eliminates the unnecessary unmapping of the kernel during
context switches and during invtlb...
1996-11-11 04:20:19 +00:00
Satoshi Asami
33c58c9f8f Remove option I586_FAST_BCOPY. The code will be included by default
if I586_CPU is defined.  Note there is a runtime check so the code
won't be run for non-Pentium CPUs anyway.

2.2 candidate, this code has been tested for almost half year in -current.
1996-11-08 02:38:44 +00:00
Joerg Wunsch
1d6ccf9cd6 Fix the message buffer mapping. This actually allows to increase
the message buffer size in <sys/msgbuf.h>.

Reviewed by:	davidg,joerg
Submitted by:	bde
1996-11-07 14:44:01 +00:00
Bruce Evans
94ca32a3f5 Don't switch from fast interrupt handlers to normal interrupt
handlers if interrupts are nested more than a few (3) deep.  This
only reduces the maximum nesting level by 1 with the standard
drivers unless there is a related bug somewhere, but can't hurt
much (the worst case is returning to hoggish interrupt handler like
wdintr(), but such interrupt handlers hurt anyway).

Fixed a previously harmless race incrementing the interrupt nesting
level.

This should be in 2.1.6 and 2.2.
1996-11-07 03:05:27 +00:00
Bruce Evans
a01024e023 Count only hardware interrupts in cnt.v_intr, so that the individual
hardware interrupt counts add up to the total.  Previously, software
interrupts generated by splz() were counted in the total.  These
software interrupts seem to be very rare - there have apparently been
0 of them on freefall among the last 352448857 interrupts.
1996-11-06 17:02:38 +00:00
John Dyson
5c2a644a47 Fix a problem with running down processes that have left wired
mappings with mlock.  This problem only occurred because of the
quick unmap code not respecting the wired-ness of pages in the
process.  In the future, we need to eliminate the dependency
intrinsic to the design of the code that wired pages actually
be mapped.  It is kind-of bogus not to have wired pages mapped,
but it is also a weakness for the code to fall flat because
of a missing page.

This show fix a problem that Tor Egge has been having, and also
should be included into 2.2-RELEASE.
1996-11-03 03:40:47 +00:00
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