Commit Graph

385 Commits

Author SHA1 Message Date
Poul-Henning Kamp
ce9edcf5b5 Merge the cons.c and cons.h to the best of my ability. alpha may or
may not compile, I can't test it.
1999-08-09 10:35:05 +00:00
Brian Feldman
8799702cbc Remove XXX from the headers (broke the build, I'm betting.) 1999-07-29 01:20:47 +00:00
Mike Smith
e33bfde398 We're called too early to have any idea whether APM is going to be
active or not.  The only sane thing we can do here is assume that if
APM is supported it might be active at some point, and bail.

In reality, even this isn't good enough; regardless of whether we support
APM or not, the system may well futz with the CPU's clock speed and throw
the TSC off.  We need to stop using it for timekeeping except under
controlled circumstances.  Curse the lack of a dependable high-resolution
timer.
1999-07-28 20:22:30 +00:00
Martin Cracauer
784648c675 Various formatting fixes on my FPE trapcode commit.
Submitted by:	BDE
1999-07-26 05:47:31 +00:00
Martin Cracauer
a7674320e9 On FPU exceptions, pass a useful error code (one of the FPE_...
macros) to the signal handler, for old-style BSD signal handlers as
the second (int) argument, for SA_SIGINFO signal handlers as
siginfo_t->si_code. This is source-compatible with Solaris, except
that we have no <siginfo.h> (which isn't even mentioned in POSIX
1003.1b).

An rather complete example program is at
  http://www3.cons.org/cracauer/freebsd-signal.c
This will be added to the regression tests in src/.

This commit also adds code to disable the (hardware) FPU from
userconfig, so that you can use a software FP emulator on a machine
that has hardware floating point. See LINT.
1999-07-25 13:16:09 +00:00
Mike Smith
91fe3dc1e1 Implement an all-CPU shootdown-style rendezvous facility. This allows
the caller to specify a function to be guarded between an entry and exit
barrier, as well as pre- and post-barrier functions.

The primary use for this function is synchronised update of per-cpu private
data.  The implementation is almost (but not quite) MI; with a better
mechanism for masking per-CPU interrupts it could probably be hoisted.

Reviewed by:	peter (partially)
1999-07-20 06:52:35 +00:00
Bruce Evans
e9ecccf8cb Updated acquire_timer2()'s state machine to work when the i8254 is
being used for timecounting.  Fixed a race or two in it.  Undisabled
it.

PR:		10455
1999-07-18 18:32:42 +00:00
Bruce Evans
ab64b6dc3c Don't let the machdep.tsc_freq sysctl proceed if the TSC is present
but broken, since tsc_timecounter is not initialised in that case,
and updating an uninitialised timecounter is fatal.

Fixed style bugs in the machdep.i8254_freq and machdep.tsc_freq
sysctls.

Reviewed by:	phk
1999-07-18 15:19:29 +00:00
Bruce Evans
eec2e836e9 Go back to the old (icu.s rev.1.7 1993) way of keeping the AST-pending
bit separate from ipending, since this is simpler and/or necessary for
SMP and may even be better for UP.

Reviewed by:	alc, luoqi, tegge
1999-07-10 15:28:01 +00:00
Bruce Evans
c618090a83 Fixed a longstanding scheduling bug. ASTs and softclock interrupts were
not masked during handling of shared PCI interrupts.  This resulted in
ASTs sometimes being discarded and softclock interrupts sometimes being
handled prematurely (sometimes = quite often on systems with shared PCI
interrupts, never on other systems).

Debugged by:	gibbs and other people at plutotech.com
PR:		6944, maybe 12381
1999-07-10 14:54:19 +00:00
Peter Wemm
e66b7bac41 Shut up gcc. 1999-06-27 09:08:48 +00:00
Brian Feldman
9840e7cb5a This commit gives support for the Rise mP6 CPU. It has two changes:
1. Rise is recognized in identdcpu.c.
	2. The TSC is not written to. A workaround for the CPU bug is being
	   applied to clock.c (the bug being that the mP6 has TSC enabled
	   in its CPUID-capabilities, but it only supports reading it. If we
	   try to write to it (MSR 16), a GPF occurs.) The new behavior is that
	   FreeBSD will _not_ zero the TSC. Instead, we do a bit of 64-bit
	   arithmetic.

Reviewed by:	msmith
Obtained from:	unfurl & msmith
1999-06-24 03:48:25 +00:00
Peter Wemm
e6eca02874 remove references to isa_device, it's no longer associated with interrupts. 1999-06-03 20:41:00 +00:00
Doug Rabson
3bfc7e5928 Remove fd driver from its old home and change files which include rtc.h
to account for its new location.
1999-05-31 18:36:14 +00:00
Doug Rabson
8b05278ca1 Allow up to 8 ports, 4 memory regions and two irqs and drqs. 1999-05-30 11:05:39 +00:00
Poul-Henning Kamp
6deb5a62cc Stop the TSC from being used as timecounter on K5/step0 machines. 1999-05-29 06:57:55 +00:00
Bruce Evans
b50641ef9c Fixed glitches (jumps) of about 1/HZ seconds for the i8254 timecounter.
The old version only worked right when the time was read strictly
more often than every 1/HZ seconds, but we only guarantee reading
it every (1/HZ + epsilon) seconds.  Part of rev.1.126-1.127 attempted
to fix this but didn't succeed.  Detect counter rollover using the
heuristic from the old version of microtime() with additional
complications for supporting calls from fast interrupt handlers.
This works provided i8254 interrupts are not delayed by more than
1/(2*HZ) seconds.

This needs more comments, and cleanups for the SMP case, and more
testing of the SMP case before it is merged into RELENG_3.

Tested by:		jhay
1999-05-28 14:08:59 +00:00
Doug Rabson
a3be63b3ce * Factor out the common code between the isa bus drivers for i386 and alpha.
* Re-work the resource allocation code to use helper functions in subr_bus.c.
* Add simple isa interface for manipulating the resource ranges which can be
  allocated and remove the code from isa_write_ivar() which was previously
  used for this purpose.
1999-05-22 15:18:28 +00:00
Peter Wemm
2b5be3fad4 Recover from removing the last (unshared) interrupt handler.
PR:		11806
Submitted by:	Assar Westerlund <assar@sics.se>
1999-05-22 09:39:31 +00:00
Peter Wemm
2f2ffb8d2c Don't hardcode IRQ 13 for NPX. It's as good as hardwired in the hardware
though, on systems (386 mostly) that still have a seperate fpu, but it
might be possible to find systems where the FPU coprocessor is wired to
a different IRQ pin.
1999-05-15 17:58:58 +00:00
Doug Rabson
6c2e3dde8c * Define a new static method DEVICE_IDENTIFY which is called to add device
instances to a parent bus.
* Define a new method BUS_ADD_CHILD which can be called from DEVICE_IDENTIFY
  to add new instances.
* Add a generic implementation of DEVICE_PROBE which calls DEVICE_IDENTIFY
  for each driver attached to the parent's devclass.
* Move the hint-based isa probe from the isa driver to a new isahint driver
  which can be shared between i386 and alpha.
1999-05-14 11:22:47 +00:00
Luoqi Chen
cd121c9cae Yet another place I missed when increasing trapframe size, which causes problem
to SIGFPE handling.

Reviewed by:	Bruce Evans	<bde@zeta.org.au>
1999-05-11 16:29:21 +00:00
Peter Wemm
45d84a2db3 Clean out some unused leftovers from before the split from the old isa.c. 1999-05-09 23:56:00 +00:00
Peter Wemm
3bab4ac5a1 For what it's worth, idelayed is declared as a volatile in the headers,
and even though it's not used in this file make it a volatile here too.
1999-05-09 23:32:29 +00:00
Doug Rabson
566643e39e Move the declaration of the interrupt type from the driver structure
to the BUS_SETUP_INTR call.
1999-05-08 21:59:43 +00:00
Peter Wemm
14d3b6b80c GC some #if 0 junk 1999-05-08 21:28:39 +00:00
Peter Wemm
1a738e4be7 Look up the sensitive flag better, allowing interoperation between old and
new isa drivers with sensitive flags.  If the resource_find() code
is meant to "find" the wildcard sensitive flag for a driver even though
a unit is supplied, this can be simplified.
1999-05-08 18:15:49 +00:00
Peter Wemm
df5c783c68 Fix unused variable "flags". (only used if #ifdef I586_CPU) 1999-05-08 18:14:09 +00:00
Peter Wemm
97bf178703 I'm not sure why the #ifdef SMP became #if 1 (this overrode the npx probe
and always succeeded as is required on SMP).  Anyway, reverting this
still compiles and appears ok.
1999-05-06 12:47:21 +00:00
Bruce Evans
ea2b3e3d1b Fixed profiling of elf kernels. Made high resolution profiling compile
for elf kernels (it is broken for all kernels due to lack of egcs support).

Renaming of many assembler labels is avoided by declaring by declaring
the labels that need to be visible to gprof as having type "function"
and depending on the elf version of gprof being zealous about discarding
the others.  A few type declarations are still missing, mainly for SMP.

PR:		9413
Submitted by:	Assar Westerlund <assar@sics.se> (initial parts)
1999-05-06 09:44:57 +00:00
Doug Rabson
6887e80a0f Use unit, not device_id as an argument to an old-style ISA interrupt
handler. This fixes pnp interrupts and would have fixed pccard interrupts
but a workaround has been applied there.

This the sound driver problems which people have reported with new-bus.
1999-05-04 21:18:20 +00:00
Luoqi Chen
5206bca10a Enable vmspace sharing on SMP. Major changes are,
- %fs register is added to trapframe and saved/restored upon kernel entry/exit.
- Per-cpu pages are no longer mapped at the same virtual address.
- Each cpu now has a separate gdt selector table. A new segment selector
  is added to point to per-cpu pages, per-cpu global variables are now
  accessed through this new selector (%fs). The selectors in gdt table are
  rearranged for cache line optimization.
- fask_vfork is now on as default for both UP and SMP.
- Some aio code cleanup.

Reviewed by:	Alan Cox	<alc@cs.rice.edu>
		John Dyson	<dyson@iquest.net>
		Julian Elischer	<julian@whistel.com>
		Bruce Evans	<bde@zeta.org.au>
		David Greenman	<dg@root.com>
1999-04-28 01:04:33 +00:00
Poul-Henning Kamp
0bb2226a4d Make the machdep.i8254_freq and machdep.tsc_freq sysctls modify the
timecounter as well

Asked for by:	bde, jhay
1999-04-25 09:00:00 +00:00
KATO Takenori
424af31b45 Changed the type of id_port from short into int to avoid wrong
conversion from short to unsigned long which is an argument of
bus_alloc_resource.  Since the value -1 is used to indicate no port
reousece, id_port need to be signed (suggested by Doug Rabson and
Peter Wemm.)
1999-04-24 18:24:43 +00:00
Peter Wemm
d70a04d62d Don't clear the hints on release, just the resource containers. 1999-04-24 06:47:24 +00:00
Peter Wemm
525a3d26e7 Make the register_intr() glue actually have a chance of working... 1999-04-23 21:01:19 +00:00
Peter Wemm
8528f91719 oops, SMP was missing includes for a typedef. 1999-04-21 07:41:40 +00:00
Peter Wemm
54a8c69347 Stage 1 of a cleanup of the i386 interrupt registration mechanism.
Interrupts under the new scheme are managed by the i386 nexus with the
awareness of the resource manager.  There is further room for optimizing
the interfaces still.  All the users of register_intr()/intr_create()
should be gone, with the exception of pcic and i386/isa/clock.c.
1999-04-21 07:26:30 +00:00
Peter Wemm
c2c75d780e As a temporary anti-foot-shooting measure, don't let the user attach
the atkbd device to isa, as was in the old (and 3.x) GENERIC config.
1999-04-16 23:39:15 +00:00
Peter Wemm
6182fdbda8 Bring the 'new-bus' to the i386. This extensively changes the way the
i386 platform boots, it is no longer ISA-centric, and is fully dynamic.
Most old drivers compile and run without modification via 'compatability
shims' to enable a smoother transition.  eisa, isapnp and pccard* are
not yet using the new resource manager.  Once fully converted, all drivers
will be loadable, including PCI and ISA.

(Some other changes appear to have snuck in, including a port of Soren's
 ATA driver to the Alpha.  Soren, back this out if you need to.)

This is a checkpoint of work-in-progress, but is quite functional.

The bulk of the work was done over the last few years by Doug Rabson and
Garrett Wollman.

Approved by:	core
1999-04-16 21:22:55 +00:00
Bruce Evans
6a9df7a421 Generate intrnames[] dynamically. This should be new-bus friendly.
Old version reviewed by: se
1999-04-14 14:26:36 +00:00
Peter Wemm
b4718cedf6 Move initialization of SWI's in the tty|net|bio masks from isa.c into
the static initializers in ipl.s.
1999-04-11 15:51:15 +00:00
Dmitrij Tejblum
a4ca0596ca Ifdef declaration of a conditionally defined function "timezero". 1999-03-28 23:28:18 +00:00
Bruce Evans
2a32c15f45 Unspammed includes in <machine/cpufunc.h> in the !SMP case. Partially
unspammed them in the SMP case.
1999-01-08 19:17:49 +00:00
Bruce Evans
68ba369606 Moved declarations related to copying and zeroing to the right place. 1999-01-08 16:29:59 +00:00
Kazutaka YOKOTA
2d15a1badc Move IO_PSMSIZE from kbdio.h to isa.h. I thought I did this a long time
ago...

While I am here, correct the values for IO_MDASIZE and IO_CGASIZE; they
should be 12 rather than 16.
1999-01-06 05:40:01 +00:00
Bruce Evans
407e5f394f Moved the declaration of another non-SMP variable into the non-SMP section. 1998-12-14 19:16:17 +00:00
Stephen McKay
2619394c7c Fix tabs that should have been spaces. Some were in kernel error messages. 1998-12-14 13:30:29 +00:00
Archie Cobbs
f1d19042b0 The "easy" fixes for compiling the kernel -Wunused: remove unreferenced static
and local variables, goto labels, and functions declared but not defined.
1998-12-07 21:58:50 +00:00
Archie Cobbs
2127f26023 Examine all occurrences of sprintf(), strcat(), and str[n]cpy()
for possible buffer overflow problems. Replaced most sprintf()'s
with snprintf(); for others cases, added terminating NUL bytes where
appropriate, replaced constants like "16" with sizeof(), etc.

These changes include several bug fixes, but most changes are for
maintainability's sake. Any instance where it wasn't "immediately
obvious" that a buffer overflow could not occur was made safer.

Reviewed by:	Bruce Evans <bde@zeta.org.au>
Reviewed by:	Matthew Dillon <dillon@apollo.backplane.com>
Reviewed by:	Mike Spengler <mks@networkcs.com>
1998-12-04 22:54:57 +00:00