Commit Graph

610 Commits

Author SHA1 Message Date
John Baldwin
1e4cad1384 Use i8259A register defines from shared header sys/dev/ic/i8259.h instead
of from the amd64-specific icu.h.
2004-01-06 19:05:25 +00:00
Peter Wemm
cda078658e Cosmetic and/or trivial sync up with i386.
Approved by:  re (rwatson)
2003-11-21 03:02:00 +00:00
Peter Wemm
dd9a634b8a MFi386: pre-register idt slots for atpic so we catch any strays without
blowing up.

Approved by:  re (scottl)
2003-11-21 02:58:26 +00:00
Peter Wemm
108d22fa65 MFi386 rev 1.207 (phk): Don't mistakenly disable the TSC when using
statclock_disable.

Approved by:  re (scottl)
2003-11-21 02:53:49 +00:00
Peter Wemm
ef3c5c9015 Add SMP changes as should have been committed as rev 1.28 2003-11-17 09:19:12 +00:00
Peter Wemm
07cda73444 Restore file accidently killed in the crossfire from the smp commit. 2003-11-17 09:11:04 +00:00
Peter Wemm
0d2a298904 Initial landing of SMP support for FreeBSD/amd64.
- This is heavily derived from John Baldwin's apic/pci cleanup on i386.
- I have completely rewritten or drastically cleaned up some other parts.
  (in particular, bootstrap)
- This is still a WIP.  It seems that there are some highly bogus bioses
  on nVidia nForce3-150 boards.  I can't stress how broken these boards
  are.  I have a workaround in mind, but right now the Asus SK8N is broken.
  The Gigabyte K8NPro (nVidia based) is also mind-numbingly hosed.
- Most of my testing has been with SCHED_ULE.  SCHED_4BSD works.
- the apic and acpi components are 'standard'.
- If you have an nVidia nForce3-150 board, you are stuck with 'device
  atpic' in addition, because they somehow managed to forget to connect the
  8254 timer to the apic, even though its in the same silicon!  ARGH!
  This directly violates the ACPI spec.
2003-11-17 08:58:16 +00:00
Peter Wemm
0469a9ecfd Oh, how embarresing. I broke my own platform. :-) 2003-11-17 07:50:59 +00:00
Peter Wemm
1f6c75db0b Preemptively burn a bridges. The isa timer code is likely to be
replaced by the HPET timer at some point, so dont even make a release
with the aquire/release_timer0 functions.
2003-11-14 22:34:43 +00:00
John Baldwin
64bb257f0b Always install IDT entries for ATPIC interrupt sources. The APIC no
longer uses these interrupt vectors for its ISA interrupt pins, so these
entries will not be overwritten.  If we get a spurious interrupt from the
ATPIC when using the APIC, it will be treated as a stray interrupt instead
of causing a panic.
2003-11-14 21:02:49 +00:00
Peter Wemm
2edfe38b10 "opt_auto_eoi.h" is not used here anymore. See atpic.c. 2003-11-14 20:06:24 +00:00
John Baldwin
f082493f10 Replace magic numbers with macros for i8259A register constants. Still
need the ICW4 bits for PC98 though.
2003-11-14 19:13:06 +00:00
Peter Wemm
3ef6155b2e Fix up the control word 3 bits. jhb discovered how much I screwed this
up. :-]
2003-11-14 18:20:20 +00:00
Peter Wemm
e46fe241d3 Stop pretending to support kernel profiling. The FAKE_MCOUNT() etc
calls are just gradually getting more and more stale.  At this point it
would be better to start from scratch once prof_machdep.c is adapted.
2003-11-13 02:38:33 +00:00
John Baldwin
bd9cd7e3f7 - Move manipulation of td_intr_nesting_level out of assembly interrupt
vector stubs and into the C functions they call.
- Move disabling and EOIing of interrupt sources out of PIC driver entry
  points and into intr_execute_handlers().  Intr_execute_handlers() only
  disables a source for an interrupt if it is a stray interrupt or has
  threaded handlers.  Sources with fast handlers no longer disable (mask)
  the source while executing the handlers.
- Move the setting of clkintr_pending into intr_execute_handlers() and set
  the variable for any interrupt source with a vector of 0.  (Should only
  be true for IRQ 0.)  This fixes clkintr_pending in the NO_MIXED_MODE
  case.
- Implement lapic_eoi() and use it to implement ioapic_eoi_source().
- Rename atpic_sched_ithd() to atpic_handle_intr() since it is used to
  handle all atpic interrupts and not just threaded ones.

Inspired by:	peter's changes to amd64 in p4 (1)
Requested by:	bde (2)
2003-11-12 18:13:57 +00:00
Peter Wemm
bf2f09ee97 The great s/npx/fpu/gi 2003-11-08 03:33:38 +00:00
Peter Wemm
8b2454d833 Rename npx* to fpu*. I haven't done the flags/function names yet. 2003-11-08 02:39:46 +00:00
Peter Wemm
7538a488f5 There isn't much point printing 'npx0: INT 16 interface' because that is
the only way it works here.
2003-11-08 00:13:43 +00:00
Yoshihiro Takahashi
0ca1bf3907 Fix to support pc98. 2003-11-04 13:13:04 +00:00
Yoshihiro Takahashi
95755cc99b Split pc98 support into pc98/pc98/nmi.c. 2003-11-04 13:01:41 +00:00
John Baldwin
223e573bbd Add the new atpic(4) driver for the 8259A master and slave PICs. By
default we provide 16 interrupt sources for IRQs 0 through 15.  However,
if the I/O APIC driver has already registered sources for any of those IRQs
then we will silently fail to register our own source for that IRQ.

Note that i386/isa/icu.h is now specific to the 8259A and no longer
contains any info relevant to APICs.  Also note that fast interrupts no
longer use a separate entry point.  Instead, both fast and threaded
interrupts share the same entry point which merely looks up the appropriate
source and passes control to intr_execute_handlers().
2003-11-03 21:34:45 +00:00
John Baldwin
e14243fac7 Move the NMI handling code out to its own file. 2003-11-03 21:10:17 +00:00
Peter Wemm
ba5a51ea04 MFi386: Do not depend on LEAPYEAR() macro boolean values being 0 or 1.
MFi386: Add quality field for timer0
2003-09-30 06:42:47 +00:00
Peter Wemm
ec548f97fc MFi386: BURN_BRIDGES around timer0 functions 2003-09-30 06:38:11 +00:00
Peter Wemm
d79ddbf5de MFi386 machdep.c rev 1.201, clock.c 1.201, clock.h 1.45 by phk: Dont
initialize a TSC timecounter until we know if it is broke or not.

XXX I think there is a bug in the i386 code here.  init_TSC_tc() comes
after:
  if (statclock_disable)
    return;

ie: if you turn off the statclock interrupt, you dont get the TSC either.
2003-09-22 23:02:24 +00:00
Peter Wemm
882554f111 MFi386: machdep.c:1.570 clock.c:1.204 by bde: Quick fix for calling DELAY
for ddb input in some atkbd-based console drivers.  ddb must not use any
normal locks but DELAY() normally calls getit() which needs clock_lock.
This also removes the need for recursion on clock_lock.
2003-09-22 21:56:48 +00:00
David E. O'Brien
56ae44c5df Use __FBSDID().
Brought to you by:	a boring talk at Ottawa Linux Symposium
2003-07-25 21:19:19 +00:00
David E. O'Brien
006124d811 Use __FBSDID(). 2003-06-02 16:32:55 +00:00
Peter Wemm
bf1e897425 Give a %fs and %gs to userland. Use swapgs to obtain the kernel %GS.base
value on entry and exit.  This isn't as easy as it sounds because when
we recursively trap or interrupt, we have to avoid duplicating the
swapgs instruction or we end up back with the userland %gs.  I implemented
this by testing TF_CS to see if we're coming from supervisor mode
already, and check for returning to supervisor. To avoid a race with
interrupts in the brief period after beginning executing the handler and
before the swapgs, convert all trap gates to interrupt gates, and reenable
interrupts immediately after the swapgs.  I am not happy with this.
There are other possible ways to do this that should be investigated.
(eg: storing the GS.base MSR value in the trapframe)

Add some sysarch functions to let the userland code get to this.

Approved by:	re (blanket amd64/*)
2003-05-12 02:37:29 +00:00
John Baldwin
ace85d0a3c Style nits.
Approved by:	re (bmah)
2003-05-07 17:21:38 +00:00
Peter Wemm
5b27e93419 Repocopy *.s to *.S 2003-05-03 00:21:43 +00:00
Peter Wemm
afa8862328 Commit MD parts of a loosely functional AMD64 port. This is based on
a heavily stripped down FreeBSD/i386 (brutally stripped down actually) to
attempt to get a stable base to start from.  There is a lot missing still.
Worth noting:
- The kernel runs at 1GB in order to cheat with the pmap code.  pmap uses
  a variation of the PAE code in order to avoid having to worry about 4
  levels of page tables yet.
- It boots in 64 bit "long mode" with a tiny trampoline embedded in the
  i386 loader.  This simplifies locore.s greatly.
- There are still quite a few fragments of i386-specific code that have
  not been translated yet, and some that I cheated and wrote dumb C
  versions of (bcopy etc).
- It has both int 0x80 for syscalls (but using registers for argument
  passing, as is native on the amd64 ABI), and the 'syscall' instruction
  for syscalls.  int 0x80 preserves all registers, 'syscall' does not.
- I have tried to minimize looking at the NetBSD code, except in a couple
  of places (eg: to find which register they use to replace the trashed
  %rcx register in the syscall instruction).  As a result, there is not a
  lot of similarity.  I did look at NetBSD a few times while debugging to
  get some ideas about what I might have done wrong in my first attempt.
2003-05-01 01:05:25 +00:00
Alexander Kabaev
104a9b7e3e Deprecate machine/limits.h in favor of new sys/limits.h.
Change all in-tree consumers to include <sys/limits.h>

Discussed on:	standards@
Partially submitted by: Craig Rodrigues <rodrigc@attbi.com>
2003-04-29 13:36:06 +00:00
Dag-Erling Smørgrav
9f45b2da8f Define ovbcopy() as a macro which expands to the equivalent bcopy() call,
to take care of the KAME IPv6 code which needs ovbcopy() because NetBSD's
bcopy() doesn't handle overlap like ours.

Remove all implementations of ovbcopy().

Previously, bzero was a function pointer on i386, to save a jmp to
bzero_vector.  Get rid of this microoptimization as it only confuses
things, adds machine-dependent code to an MD header, and doesn't really
save all that much.

This commit does not add my pagezero() / pagecopy() code.
2003-04-04 17:29:55 +00:00
Peter Wemm
cc66ebe2a9 Commit a partial lazy thread switch mechanism for i386. it isn't as lazy
as it could be and can do with some more cleanup.  Currently its under
options LAZY_SWITCH.  What this does is avoid %cr3 reloads for short
context switches that do not involve another user process.  ie: we can
take an interrupt, switch to a kthread and return to the user without
explicitly flushing the tlb.  However, this isn't as exciting as it could
be, the interrupt overhead is still high and too much blocks on Giant
still.  There are some debug sysctls, for stats and for an on/off switch.

The main problem with doing this has been "what if the process that you're
running on exits while we're borrowing its address space?" - in this case
we use an IPI to give it a kick when we're about to reclaim the pmap.

Its not compiled in unless you add the LAZY_SWITCH option.  I want to fix a
few more things and get some more feedback before turning it on by default.

This is NOT a replacement for Bosko's lazy interrupt stuff.  This was more
meant for the kthread case, while his was for interrupts.  Mine helps a
little for interrupts, but his helps a lot more.

The stats are enabled with options SWTCH_OPTIM_STATS - this has been a
pseudo-option for years, I just added a bunch of stuff to it.

One non-trivial change was to select a new thread before calling
cpu_switch() in the first place.  This allows us to catch the silly
case of doing a cpu_switch() to the current process.  This happens
uncomfortably often.  This simplifies a bit of the asm code in cpu_switch
(no longer have to call choosethread() in the middle).  This has been
implemented on i386 and (thanks to jake) sparc64.  The others will come
soon.  This is actually seperate to the lazy switch stuff.

Glanced at by:  jake, jhb
2003-04-02 23:53:30 +00:00
Jeff Roberson
fb8aaa76c7 - In npxgetregs() use the td argument to save the fpu state from and not
curthread.  Nothing currently depends on this behavior.
 - Clean up an extra newline.

Obtained from:	bde
2003-04-01 00:16:32 +00:00
Jeff Roberson
4c8a7679d0 - In npxsetregs don't set the floating point if td == fpcurthread not if
curthread == fpcurthread.  This is important when we're saving the fp
   state for a thread other than curthread as in from set_mcontext.
2003-03-31 00:32:43 +00:00
Jake Burkholder
227f9a1c58 - Add vm_paddr_t, a physical address type. This is required for systems
where physical addresses larger than virtual addresses, such as i386s
  with PAE.
- Use this to represent physical addresses in the MI vm system and in the
  i386 pmap code.  This also changes the paddr parameter to d_mmap_t.
- Fix printf formats to handle physical addresses >4G in the i386 memory
  detection code, and due to kvtop returning vm_paddr_t instead of u_long.

Note that this is a name change only; vm_paddr_t is still the same as
vm_offset_t on all currently supported platforms.

Sponsored by:	DARPA, Network Associates Laboratories
Discussed with:	re, phk (cdevsw change)
2003-03-25 00:07:06 +00:00
Matthew N. Dodd
b7b5ae3edb Use repo-copied files in sys/i386/bios. 2003-03-24 19:14:46 +00:00
Poul-Henning Kamp
b4b138c27f Including <sys/stdint.h> is (almost?) universally only to be able to use
%j in printfs, so put a newsted include in <sys/systm.h> where the printf
prototype lives and save everybody else the trouble.
2003-03-18 08:45:25 +00:00
Julian Elischer
4a338afd7a Move a bunch of flags from the KSE to the thread.
I was in two minds as to where to put them in the first case..
I should have listenned to the other mind.

Submitted by:	 parts by davidxu@
Reviewed by:	jeff@ mini@
2003-02-17 09:55:10 +00:00
Poul-Henning Kamp
70d8e2e9aa Switch to using the TSC code in i386/i386/tsc.c. 2003-02-11 11:43:25 +00:00
Poul-Henning Kamp
91f1c2b3cc Split the global timezone structure into two integer fields to
prevent the compiler from optimizing assignments into byte-copy
operations which might make access to the individual fields non-atomic.

Use the individual fields throughout, and don't bother locking them with
Giant: it is no longer needed.

Inspired by:    tjr
2003-02-03 19:49:35 +00:00
Jake Burkholder
238dd3209a Split statclock into statclock and profclock, and made the method for driving
statclock based on profhz when profiling is enabled MD, since most platforms
don't use this anyway.  This removes the need for statclock_process, whose
only purpose was to subdivide profhz, and gets the profiling clock running
outside of sched_lock on platforms that implement suswintr.
Also changed the interface for starting and stopping the profiling clock to
do just that, instead of changing the rate of statclock, since they can now
be separate.

Reviewed by:	jhb, tmm
Tested on:	i386, sparc64
2003-02-03 17:53:15 +00:00
Poul-Henning Kamp
3c99c0bc50 Make tsc_freq a 64bit quantity.
Inspired by:    http://www.theinquirer.net/?article=7481
2003-01-29 11:36:39 +00:00
Poul-Henning Kamp
92a306a2b6 Use the correct value when writing the Day Of Week byte in the CMOS.
The correct range is [1...7] with Sunday=1, but we have been writing
[0...6] with Sunday=0.

The Soekris computers flagged the zero, zapped the date, so if you
rebooted your soekris on a sunday, it would come up with a wrong
date.

Bruce has a more extensive rework of this code, but we will stick with
the minimalist fix for now.

Spotted by:	Soren Kristensen <soren@soekris.com>
Thanks to:	Michael Sierchio <kudzu@tenebras.com>.
Confirmed by:	bde
Approved by:	re
2002-12-04 13:46:49 +00:00
Daniel Eischen
2be05b70c9 Add getcontext, setcontext, and swapcontext as system calls.
Previously these were libc functions but were requested to
be made into system calls for atomicity and to coalesce what
might be two entrances into the kernel (signal mask setting
and floating point trap) into one.

A few style nits and comments from bde are also included.

Tested on alpha by: gallatin
2002-11-16 06:35:53 +00:00
David Xu
1f82496322 Fix typo. ioport_rid should be irq_rid. 2002-11-05 04:03:42 +00:00
Peter Wemm
331e4823a2 Finish fixing the 5.x FPU code for dealing with signal handlers.
Obtained from:  bde
2002-10-25 19:12:16 +00:00
Poul-Henning Kamp
05f6411a98 Remove a boatload of '&' which are surplus to the requirements.
Validated by:	md5 hash is unchanged.
2002-10-20 18:02:46 +00:00