Commit Graph

131 Commits

Author SHA1 Message Date
bde
9dd9cb4cb2 Removed bogus casts of USRSTACK and/or the other operand in binary
expressions involving USRSTACK.
1998-12-16 15:21:51 +00:00
archie
5c694b81cd Avoid compiler warning (printf arg type mismatch) when compiling #ifdef DEBUG 1998-12-06 00:03:30 +00:00
kato
72f8d0d43a - For some old Cyrix CPUs, %cr2 is clobbered by interrupts. This
problem is worked around by using an interrupt gate for the page
   fault handler.  This code was originally made for NetBSD/pc98 by
   Naofumi Honda <honda@kururu.math.sci.hokudai.ac.jp> and has already
   been in PC98 tree.  Because of this bug, trap_fatal cannot show
   correct page fault address if %cr2 is obtained in this function.
   Therefore, trap_fatal uses the value from trap() function.
-  The trap handler always enables interruption when buggy application
   or kernel code has disabled interrupts and then trapped.  This code
   was prepared by Bruce Evans <bde@FreeBSD.org>.

Submitted by:	Bruce Evans <bde@FreeBSD.org>
		Naofumi Honda <honda@kururu.math.sci.hokudai.ac.jp>
1998-12-02 08:15:17 +00:00
bde
1275a52cea Fixed printf format errors. 1998-08-23 10:16:26 +00:00
eivind
67c7bb9c04 Translate T_PROTFLT to SIGSEGV instead of SIGBUS when running under
Linux emulation.  This make Allegro Common Lisp 4.3 work under
FreeBSD!

Submitted by: Fred Gilham <gilham@csl.sri.com>
Commented on by: bde, dg, msmith, tg
Hoping he got everything right:  eivind
1998-04-28 18:15:08 +00:00
bde
b598f559b2 Support compiling with `gcc -ansi'. 1998-04-15 17:47:40 +00:00
phk
9b703b1455 Eradicate the variable "time" from the kernel, using various measures.
"time" wasn't a atomic variable, so splfoo() protection were needed
around any access to it, unless you just wanted the seconds part.

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

gettime() changed to getmicrotime(0.

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

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

Add a new nfs_curusec() function.

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

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

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

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

Reviewed by:	bde
1998-03-30 09:56:58 +00:00
bde
cd450d6714 Moved some #includes from <sys/param.h> nearer to where they are actually
used.
1998-03-28 10:33:27 +00:00
jlemon
8f4e20b1a3 Add the ability to make real-mode BIOS calls from the kernel. Currently,
everything is contained inside #ifdef VM86, so this option must be
present in the config file to use this functionality.

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

Currently, the only BIOS calls made are memory-sizing routines at bootup,
these replace reading the RTC values.
1998-03-23 19:52:59 +00:00
eivind
4547a09753 Back out DIAGNOSTIC changes. 1998-02-06 12:14:30 +00:00
eivind
c552a9a1c3 Turn DIAGNOSTIC into a new-style option. 1998-02-04 22:34:03 +00:00
eivind
e8dbec0c06 Make POWERFAIL_NMI, PPS_SYNC and NATM new style options.
This also fixes a couple of defunct options; submitted by bde.
1998-01-31 05:00:21 +00:00
sef
c7d273eccb Changes to allow event-based process monitoring and control. 1997-12-06 04:11:14 +00:00
jmg
81a1ed7d07 document and make the NO_F00F_HACK a proper option...
also, sort some option includes while I'm here..

Forgotten by:	sef
1997-12-04 21:21:26 +00:00
jkh
5409c159ea After consultation with David, change
#ifndef NO_F00F_HACK
to
#if defined(I586_CPU) && !defined(NO_F00F_HACK)
1997-12-04 14:35:40 +00:00
sef
27c596e1ed Work around for the Intel Pentium F00F bug; this is Intel's recommended
workaround.  Note that this currently eats up two pages extra in the system;
this could be alleviated by aligning idt correctly, and then only dealing with
that (as opposed to the current method of allocated two pages and copying the
IDT table to that, and then setting that to be the IDT table).
1997-12-03 02:45:50 +00:00
bde
48ccf62b8e Fixed some #include messes.
Hid the check of the user %cs in syscall() under `#ifdef DIAGNOSTIC'.
1997-11-24 13:25:37 +00:00
phk
4c8218a5c7 Move the "retval" (3rd) parameter from all syscall functions and put
it in struct proc instead.

This fixes a boatload of compiler warning, and removes a lot of cruft
from the sources.

I have not removed the /*ARGSUSED*/, they will require some looking at.

libkvm, ps and other userland struct proc frobbing programs will need
recompiled.
1997-11-06 19:29:57 +00:00
peter
df386e1ca3 Compensate for pcb.h tweaks.
(Bruce pointed out the nesting)
1997-10-10 12:42:54 +00:00
peter
fc821abd4c Convert the VM86 option from a global option to an option only depended
on by the files that use it.  Changing the VM86 option now only causes
a recompile of a dozen files or so rather than the entire kernel.
1997-10-10 09:44:12 +00:00
gibbs
6450b2fc55 autoconf.c:
Add cpu_rootconf and cpu_dumpconf so that configuring these
	two devices can be better controlled by the MI configuration
	code.

machdep.c:
	MD initialization code for the new callout interface.

trap.c:
	Add support for printing out whether cam interrupts are masked
	during a panic.
1997-09-21 21:38:05 +00:00
peter
1428bb8823 Cosmetic adjustment for the trap/double fault/panic cpu id listing.
It now prints the apic id in hex rather than decimal.
1997-09-05 08:54:55 +00:00
jlemon
ada62b471a Remove the vm86 support as an LKM, and link it directly into the kernel
if 'options "VM86"' is in the config file.  The LKM was really for
development, and has probably outlived its usefulness.
1997-08-28 14:36:56 +00:00
peter
7dfe3e5abe Clean up the SMP AP bootstrap and eliminate the wretched idle procs.
- We now have enough per-cpu idle context, the real idle loop has been
revived (cpu's halt now with nothing to do).
- Some preliminary support for running some operations outside the
global lock (eg: zeroing "free but not yet zeroed pages") is present
but appears to cause problems.  Off by default.
- the smp_active sysctl now behaves differently. It's merely a 'true/false'
option.  Setting smp_active to zero causes the AP's to halt in the idle
loop and stop scheduling processes.
- bootstrap is a lot safer.  Instead of sharing a statically compiled in
stack a number of times (which has caused lots of problems) and then
abandoning it, we use the idle context to boot the AP's directly.  This
should help >2 cpu support since the bootlock stuff was in doubt.
- print physical apic id in traps.. helps identify private pages getting
out of sync.  (You don't want to know how much hair I tore out with this!)

More cleanup to follow, this is more of a checkpoint than a
'finished' thing.
1997-08-26 18:10:38 +00:00
charnier
ec0491b457 Revert my previous commit about using CS_SECURE macro.
Requested by:	Bruce.
1997-08-21 06:33:04 +00:00
fsmp
2c414e3eff Preperation for moving cpl into critical region access.
Several new fine-grained locks.
New FAST_INTR() methods:
 - separate simplelock for FAST_INTR, no more giant lock.
 - FAST_INTR()s no longer checks ipending on way out of ISR.
sio made MP-safe (I hope).
1997-08-20 05:25:48 +00:00
charnier
e0224667fe Use CS_SECURE macro.
Reviewed by:	John Dyson
1997-08-18 06:58:59 +00:00
dyson
782a1cf641 Back out a part of the disk scheduling "improvements" :-(. Let me know
how the system works now!!!
1997-08-12 19:07:42 +00:00
dyson
c38957d22b Modify the scheduling policy to take into account disk I/O waits
as chargeable CPU usage.  This should mitigate the problem of processes
doing disk I/O hogging the CPU.  Various users have reported the
problem, and test code shows that the problem should now be gone.
1997-08-09 10:13:32 +00:00
dyson
ad0649e2b9 VM86 kernel support.
Work done by BSDI, Jonathan Lemon <jlemon@americantv.com>,
	Mike Smith <msmith@gsoft.com.au>, Sean Eric Fagan <sef@kithrup.com>,
	and probably alot of others.
Submitted by:	Jnathan Lemon <jlemon@americantv.com>
1997-08-09 00:04:06 +00:00
bde
37174c05e6 Removed unused #includes. 1997-07-20 08:37:24 +00:00
peter
2dc5ff96e7 Preliminary support for per-cpu data pages.
This eliminates a lot of #ifdef SMP type code.  Things like _curproc reside
in a data page that is unique on each cpu, eliminating the expensive macros
like:    #define curproc (SMPcurproc[cpunumber()])

There are some unresolved bootstrap and address space sharing issues at
present, but Steve is waiting on this for other work.  There is still some
strictly temporary code present that isn't exactly pretty.

This is part of a larger change that has run into some bumps, this part is
standalone so it should be safe.  The temporary code goes away when the
full idle cpu support is finished.

Reviewed by: fsmp, dyson
1997-06-22 16:04:22 +00:00
bde
6babbddd76 Preserve %fs and %gs across context switches. This has a relatively low
cost since it is only done in cpu_switch(), not for every exception.
The extra state is kept in the pcb, and handled much like the npx state,
with similar deficiencies (the state is not preserved across signal
handlers, and error handling loses state).
1997-06-07 04:36:10 +00:00
dfr
6ba14cc686 Move interrupt handling code from isa.c to a new file. This should make
isa.c (slightly) more portable and will make my life developing the really
portable version much easier.

Reviewed by:	peter, fsmp
1997-06-02 08:19:06 +00:00
peter
1ef1946e2f Include file updates.. <machine/spl.h> -> <machine/ipl.h>, add
<machine/ipl.h> to those files that were depending on getting SWI_*
implicitly via <machine/cpufunc.h>
1997-05-31 09:27:31 +00:00
peter
85a1abc657 remove opt_smp.h and fix the reason it was needed. 1997-05-29 05:04:30 +00:00
peter
1c30a50dff md_regs is now a struct trapframe * 1997-05-07 20:08:53 +00:00
dyson
16cf7a4978 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
peter
6323aa10bf 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
bde
880c5c361f 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
peter
ecf50a7463 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
237ff29ca4 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
dyson
22d3427970 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
peter
94b6d72794 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
dyson
10f666af84 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
dyson
f950a9a8f5 Remove some dead code from trapwrite.
Submitted by:	Stephen McKay <syssgm@devetir.qld.gov.au>
1997-01-23 01:30:59 +00:00
jkh
808a36ef65 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
bde
6a187caa32 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
bde
25556c3b93 Updated #includes to 4.4Lite style. 1996-09-10 08:32:01 +00:00
dg
2fc7d7d1fa Change an splclock that needs to be an splhigh into an splhigh.
Reviewed by:	bde
1996-09-01 10:10:12 +00:00