Commit Graph

1868 Commits

Author SHA1 Message Date
John Baldwin
eb2a2211ff Revert the critical section implementation to disable interrupts via
cli/sti now that we support many more than 32 interrupt sources.
2003-11-03 21:06:54 +00:00
John Baldwin
63239aa581 Always export r_gdt and r_idt and give them extern declarations in
machine/segments.h.
2003-10-30 21:42:17 +00:00
John Baldwin
07930cce05 A few whitespace and comment tweaks. 2003-10-24 21:02:26 +00:00
Bruce M Simpson
2bc7dd5661 Move pmap_resident_count() from the MD pmap.h to the MI pmap.h.
Add a definition of pmap_wired_count().
Add a definition of vmspace_wired_count().

Reviewed by:	truckman
Discussed with:	peter
2003-10-06 01:47:12 +00:00
Peter Wemm
6ccf265bb0 Commit Bosko's patch to clean up the PSE/PG_G initialization to and
avoid problems with some Pentium 4 cpus and some older PPro/Pentium2
cpus.  There are several problems, some documented in Intel errata.
This patch:
1) moves the kernel to the second page in the PSE case.  There is an
errata that says that you Must Not point a 4MB page at physical
address zero on older cpus.  We avoided bugs here due to sheer luck.
2) sets up PSE page tables right from the start in locore, rather than
trying to switch from 4K to 4M (or 2M) pages part way through the boot
sequence at the same time that we're messing with PG_G.

For some reason, the pmap work over the last 18 months seems to tickle
the problems, and the PAE infrastructure changes disturb the cpu
bugs even more.

A couple of people have reported a problem with APM bios calls during
boot.  I'll work with people to get this resolved.

Obtained from:	bmilekic
2003-10-01 23:46:08 +00:00
Jeff Roberson
977f9ab515 - Add ss2_pagezero() for zeroing pages using the movnti instruction. This
instruction is enabled with SSE2 but does not use SSE registers.  It is a
   "non-temporal" move which bypasses the cache and does not dirty lines.
2003-10-01 05:25:27 +00:00
Jeff Roberson
fa3f9daae5 - On my Pentium4-M laptop, invalpg takes ~1100 cycles if the page is found in
the TLB and ~1600 if it is not.  Therefore, it is more effecient to
   invalidate the TLB after operations that use CMAP rather than before.
 - So that the tlb is invalidated prior to switching off of a processor, we
   must change the switchin functions to switchout functions.
 - Remove td_switchout from the thread and move it to the x86 pcb.
 - Move the code that calls switchout into swtch.s.  These changes make this
   optimization truely x86 specific.
2003-09-30 08:11:36 +00:00
Alan Cox
f3fd831cdd - Eliminate the pte object.
- Use kmem_alloc_nofault() rather than kmem_alloc_pageable() to allocate
   KVA space for the page directory page(s).  Submitted by: tegge
2003-09-25 02:51:06 +00:00
Peter Wemm
c460ac3a00 Add sysentvec->sv_fixlimits() hook so that we can catch cases on 64 bit
systems where the data/stack/etc limits are too big for a 32 bit process.

Move the 5 or so identical instances of ELF_RTLD_ADDR() into imgact_elf.c.

Supply an ia32_fixlimits function.  Export the clip/default values to
sysctl under the compat.ia32 heirarchy.

Have mmap(0, ...) respect the current p->p_limits[RLIMIT_DATA].rlim_max
value rather than the sysctl tweakable variable.  This allows mmap to
place mappings at sensible locations when limits have been reduced.

Have the imgact_elf.c ld-elf.so.1 placement algorithm use the same
method as mmap(0, ...) now does.

Note that we cannot remove all references to the sysctl tweakable
maxdsiz etc variables because /etc/login.conf specifies a datasize
of 'unlimited'.  And that causes exec etc to fail since it can no
longer find space to mmap things.
2003-09-25 01:10:26 +00:00
Warner Losh
00dc18b5a8 Per TRB vote: restore the aquire_timer0 and associated goo. This will
be gone in FreeBSD 6, so put BURN_BRIDGES around it.  The TRB also
felt that if something better comes along sooner, it can be used to
replace this code.

Delayed by: BSDcon and subsequent disk crash.
2003-09-24 15:33:33 +00:00
Yoshihiro Takahashi
33e38a2cc8 Implement the bus_space_map() function to allocate resources and initialize
a bus_handle, but currently it does only initializing a bus_handle.
2003-09-23 08:22:34 +00:00
Peter Wemm
795a3f5279 Microoptimization to allow the compiler to evaluate ntohl() etc on
known constants at compile time rather than at run time.  We have a number
of nasty hacks around the place to cache ntohl() of constants (eg: nfs).
This change allows the compiler to compile-time evaluate ntohl(1) as
0x01000000 rather than having to emit assembler code to do it.  This
has other smaller flow-on effects because the compiler can see that
ntohl(constant) itself has a constant value now and can propagate the
compile time evaluation.

Obtained from:  Ideas from NetBSD and Linux, and some code from NetBSD
2003-09-22 21:46:47 +00:00
John Baldwin
eb975edd06 Fix a busted constant related to PCI configuration acess method #1. The
reserved bits in the port that must be zero are 24:30, not 20:30.  Bits
16:23 are used to set the bus number.  This meant that when we tested for
config mechanism #1, if the previous PCI configuration transaction sent
used a bus number greater than 15, one of the bits in 20:23 would be
non-zero and we would fail to use config mechanism #1 and thus fail to see
that PCI existed on the machine at all.

Obtained from:	Shanley's PCI System Architecture book
Tested by:	des
Proxied through:	njl
2003-09-18 17:00:03 +00:00
John Baldwin
a547af297d Remove an XXX comment by using the per CPU mask added after this comment
was added.
2003-09-10 01:36:48 +00:00
John Baldwin
4c93af3788 Add a acpi_SetDefaultIntrModel() method to allow drivers to set the
interrupt model prior to the acpi0 device being probed and attached.
2003-09-10 01:14:42 +00:00
John Baldwin
f03cb48d41 Fix a typo. 2003-09-10 01:11:58 +00:00
John Baldwin
0e85b19ba9 Add constants for entries in the IDT and use those instead of magic
numbers.
2003-09-10 01:07:04 +00:00
Alexander Kabaev
1d49585050 Standardize idempotentcy ifdefs. Consistently use _MACHINE_VARARGS_H_
symbol.
2003-09-01 03:01:45 +00:00
David E. O'Brien
a7b60ab26e Fix copyright comment & FBSDID style nits.
Requested by:	bde
2003-08-25 09:48:48 +00:00
Marcel Moolenaar
26502503e5 Further cleanup <machine/cpu.h> and <machine/md_var.h>: move the MI
prototypes of cpu_halt(), cpu_reset() and swi_vm() from md_var.h to
cpu.h. This affects db_command.c and kern_shutdown.c.

ia64: move all MD prototypes from cpu.h to md_var.h. This affects
madt.c, interrupt.c and mp_machdep.c. Remove is_physical_memory().
It's not used (vm_machdep.c).

alpha: the MD prototypes have been left in cpu.h with a comment
that they should be there. Moving them is left for later. It was
expected that the impact would be significant enough to be done in
a seperate commit.

powerpc: MD prototypes left in cpu.h. Comment added.

Suggested by: bde
Tested with: make universe (pc98 incomplete)
2003-08-16 16:57:57 +00:00
Poul-Henning Kamp
8dcee923b5 remove acquire_timer0() and release_timer0() and related stuff. 2003-08-15 15:50:49 +00:00
John Baldwin
6d84ef820f - Add macros describing some new MSR's in the Pentium 4 and some older
MSR's in the original Pentium.
- Add macros describing the bit fields in the APICBASE MSR.
2003-08-15 15:24:23 +00:00
John Baldwin
594dfbc391 - Fix a duplicated typo.
- Add a macro for the logical shift needed to extract an APIC ID from
  either from the local APIC ICR Hi register or the APIC ID registers of
  the local and IO APICs.
2003-08-15 15:23:13 +00:00
Warner Losh
06b4bf3e55 Expand inline the relevant parts of src/COPYRIGHT for Matt Dillon's
copyrighted files.

Approved by: Matt Dillon
2003-08-12 23:24:05 +00:00
Paul Saab
77c39e17fa Halted CPU's should not accumulate time.
Reviewed by:	jhb
2003-08-12 17:01:10 +00:00
Bruce Evans
90630944c8 Backed out previous commit. This restores the warning about pessimized
(short) types for the port arg of inb() (rev.1.56).  The warning started
working for u_short types with gcc-3.3.  The pessimizations exposed
by this been fixed except for the cx and oltr drivers where the breakage
of the warning has been pushed to the drivers.
2003-08-06 18:21:27 +00:00
Poul-Henning Kamp
2fbc275447 Dont initialize a TSC timecounter until we know if it is broken or not. 2003-08-06 15:05:27 +00:00
John Baldwin
912133cbce - GC unused cpu_thread_link().
- Move the enabling of interrupts out of assembly and into C a few
  instructions later at cpu_critical_fork_exit().  This puts more of the
  MD critical section implementation under the MD critical section API
  making it easier to test and develop alternative implementations.
2003-08-04 20:34:25 +00:00
Julian Elischer
5774db75bd Allow foot shooting as Linux emulation needs it.
Also change "Auto mode" to use a "special" value
instead of 0, and define and document it.
I had thought libpthread had already been switched to use auto mode but
it appears that patch hasn't been committed yet.

Discussed with:	 Davidxu
2003-08-04 19:11:56 +00:00
David E. O'Brien
a98a5f06d3 Style sync. 2003-08-03 07:50:19 +00:00
Peter Wemm
f3d3771beb Detour via (void *) to defeat gcc's strict-aliasing warnings when using
-O2 or -Os (such as 'make release').

This commit brought to you by the warning:
  dereferencing type-punned pointer will break strict-aliasing rules
2003-07-30 00:04:58 +00:00
Maxime Henrion
d5afecd068 - Introduce a new busdma flag BUS_DMA_ZERO to request for zero'ed
memory in bus_dmamem_alloc().  This is possible now that
  contigmalloc() supports the M_ZERO flag.
- Remove the locking of Giant around calls to contigmalloc() since
  contigmalloc() now grabs Giant itself.
2003-07-27 13:52:10 +00:00
Poul-Henning Kamp
8b30546120 Stop GCC from whining when people use a 16 bit port number for inb() and outb() 2003-07-23 20:28:23 +00:00
John Baldwin
e47d4f0fc2 Use macros from apic.h to when writing to the ICR to send IPIs to startup
APs rather than magic numbers.

Tested by:	scottl
2003-07-23 19:04:28 +00:00
John Baldwin
55fb372edd Add a new macro APIC_ICRLO_RESV_MASK that contains all of the reserved
fields in the low 32 bits of the local APIC ICR register.  Use this macro
in place of APIC_RESV2_MASK when masking off existing bits from the ICR
when writing to it to send an IPI.

Tested by:	scottl
2003-07-23 18:59:38 +00:00
Peter Wemm
461d4da338 Remove _ARCH_INDIRECT, it was the glue to enable having both hardware
and software versions of the floating point code in libm.  The runtime
selection was done by reading the hw.floatingpoint sysctl via
__get_hw_float().
2003-07-23 04:28:51 +00:00
Peter Wemm
a35b33869d Initiate de-orbit burn for fpu-less operation. 386+387 is still
theoretically supportable, but you'd really be happier with FreeBSD 2.1.8
on it.
2003-07-22 08:11:17 +00:00
Mark Murray
c7b132c974 Protect lint(1) from a #error. 2003-07-10 18:05:02 +00:00
Peter Wemm
e95babf3a8 unifdef -DLAZY_SWITCH and start to tidy up the associated glue. 2003-07-10 01:02:59 +00:00
Scott Long
f6b1c44d1f Mega busdma API commit.
Add two new arguments to bus_dma_tag_create(): lockfunc and lockfuncarg.
Lockfunc allows a driver to provide a function for managing its locking
semantics while using busdma.  At the moment, this is used for the
asynchronous busdma_swi and callback mechanism.  Two lockfunc implementations
are provided: busdma_lock_mutex() performs standard mutex operations on the
mutex that is specified from lockfuncarg.  dftl_lock() is a panic
implementation and is defaulted to when NULL, NULL are passed to
bus_dma_tag_create().  The only time that NULL, NULL should ever be used is
when the driver ensures that bus_dmamap_load() will not be deferred.
Drivers that do not provide their own locking can pass
busdma_lock_mutex,&Giant args in order to preserve the former behaviour.

sparc64 and powerpc do not provide real busdma_swi functions, so this is
largely a noop on those platforms.  The busdma_swi on is64 is not properly
locked yet, so warnings will be emitted on this platform when busdma
callback deferrals happen.

If anyone gets panics or warnings from dflt_lock() being called, please
let me know right away.

Reviewed by:	tmm, gibbs
2003-07-01 15:52:06 +00:00
Jeff Roberson
ab875ef896 - Construct a cpu topology map for Hyper Threading systems so that ULE may
take advantage of them.
2003-06-28 22:07:42 +00:00
Peter Wemm
eabd19726f Tidy up leftover lazy_switch instrumentation that is no longer needed.
This cleans up some #ifdef hell.
2003-06-27 22:39:14 +00:00
Peter Wemm
b50953ccfa Fix the false IPIs on smp when using LAZY_SWITCH caused by pmap_activate()
not releasing the pm_active bit in the old pmap.
2003-06-27 21:50:52 +00:00
Alan Cox
49a2507bd1 Migrate the thread stack management functions from the machine-dependent
to the machine-independent parts of the VM.  At the same time, this
introduces vm object locking for the non-i386 platforms.

Two details:

1. KSTACK_GUARD has been removed in favor of KSTACK_GUARD_PAGES.  The
different machine-dependent implementations used various combinations
of KSTACK_GUARD and KSTACK_GUARD_PAGES.  To disable guard page, set
KSTACK_GUARD_PAGES to 0.

2. Remove the (unnecessary) clearing of PG_ZERO in vm_thread_new.  In
5.x, (but not 4.x,) PG_ZERO can only be set if VM_ALLOC_ZERO is passed
to vm_page_alloc() or vm_page_grab().
2003-06-14 23:23:55 +00:00
John Baldwin
9dc9d63d01 Reinstate the bug fix in revision 1.2 as it is correct. The errors I saw
on my laptop after this change were the result of a bug in the ACPICA code.
2003-06-07 14:34:18 +00:00
John Baldwin
ba40a03417 - Rename nexus_pcib to legacy_pcib. I've been meaning to do this for a
while after the legacy device was added since this driver hangs from
  legacy and not nexus.
- Make several methods non-static so they can be reused in a mptable
  host -> pci bridge driver that will be added at a later date.
- Let legacy_pcib() use pcibios_pcib_route_interrupt() directly instead of
  wrapping it in a private function.  Originally, I thought I was going to
  have the nexus_pcib() driver make a runtime APIC vs. 8259A check and call
  the appropriate routing method (MPTable vs. PIR) that way, but it ended
  up being cleaner to make nexus_pcib() just work with PIR and have a
  separate host -> pci bridge driver for the mptable/apic case.
2003-06-06 17:56:30 +00:00
John Baldwin
e59ae32f18 - Document the thermal and performance counter LVT entries in the local
APIC.
- Add a lvt_thermal member to the LAPIC struct.
- Add constants for the SMI and INIT LVT delivery modes.
2003-06-06 17:22:15 +00:00
John Baldwin
8375d3a4bc Bah, revert the previous commit for the time being due to inadequate testing
on my part.  The output asm looks correct with the previous commit in place
and it works on amd64, but on my laptop I got a spew of AE_BAD_PARAMETER
errors trying to unlock the acpi global lock.
2003-06-03 18:44:31 +00:00
John Baldwin
d234ea4e0b Fix the asm constraints so that we use the correct constants when acquiring
and releasing ACPI global locks instead of (ab)using the pointers to those
locks as the constants.  Also, rather than require that the address of
the lock be stored in a register, use a memory constraint allowing the
memory address to be used directly.

Noticed by:	peter
2003-06-03 14:46:16 +00:00
David E. O'Brien
9676a785e7 Use __FBSDID(). 2003-06-02 06:43:15 +00:00
David E. O'Brien
8d19a0584b Don't use ## to concatinate to two things that don't together make a C token.
Two tokens that don't together form a vaid preprocssor token cannot be
pasted together using ANSI-C token concatinatation.  GCC 3.2's cpp, at least,
produces the desired result w/o using "##".
2003-06-02 02:41:38 +00:00
David E. O'Brien
69bb404192 Use C99 compatable asm statements. 2003-06-02 00:29:35 +00:00
Hiten Pandya
b77c32a07e Rename BUS_DMAMEM_NOSYNC to BUS_DMA_COHERENT.
The current name is confusing, because it indicates to
the client that a bus_dmamap_sync() operation is not
necessary when the flag is specified, which is wrong.

The main purpose of this flag is to hint the underlying
architecture that DMA memory should be mapped in a coherent
way, but the architecture can ignore it.  But if the
architecture does supports coherent mapping of memory, then
it makes bus_dmamap_sync() calls cheap.

This flag is the same as the one in NetBSD's Bus DMA.

Reviewed by: gibbs, scottl, des (implicitly)
Approved by: re@ (jhb)
2003-05-30 20:40:33 +00:00
Scott Long
7e71df9339 Bring back bus_dmasync_op_t. It is now a typedef to an int, though the
BUS_DMASYNC_ definitions remain as before.  The does not change the ABI,
and reverts the API to be a bit more compatible and flexible.  This has
survived a full 'make universe'.

Approved by:	re (bmah)
2003-05-27 04:59:59 +00:00
Scott Long
c87d464f28 De-orbit bus_dmamem_alloc_size(). It's a hack and was never used anyways.
No need for it to pollute the 5.x API any further.

Approved by:	re (bmah)
2003-05-26 04:00:52 +00:00
Alexander Kabaev
980ded9a7d sys/sys/limits.h:
- Fix visibilty test for LONG_BIT and WORD_BIT.  `#if defined(__FOO_VISIBLE)'
   is alays wrong because __FOO_VISIBLE is always defined (to 0 for
   invisibility).

sys/<arch>/include/limits.h
sys/<arch>/include/_limits.h:

 - Style fixes.

Submitted by:	bde
Reviewed by:	bsdmike
Approved by:	re (scottl)
2003-05-19 20:29:07 +00:00
Alan Cox
4a0d6dfd2c Initialize logical_cpus_mask when the logical CPUs are enumerated in
the mptable.  (Previously, logical_cpus_mask was only initialized if
the hyperthreading fixup was executed.)

Approved by:	re (jhb)
Reviewed by:	ps
2003-05-15 05:12:24 +00:00
Alexander Kabaev
0eda4c08a5 Style fixes.
Remove DBL_DIG, DBL_MIN, DBL_MAX and their FLT_ counterparts, they
were marked for deprecation ever since SUSv1 at least.
Only define ULLONG_MIN/MAX and LLONG_MAX if long long type is
supported.
Restore a lost comment in MI _limits.h file and remove it from
sys/limits.h where it does not belong.
2003-05-04 22:13:04 +00:00
Peter Wemm
cda4b241e2 Hack to enable getting two different elf32 and elf64 loaders in the
same i386 loader binary.
2003-05-01 03:46:12 +00:00
Peter Wemm
e7d32e949b <b30> is 'IA64' - ie: you're running on an ia64 in 32 bit mode. 2003-05-01 03:44:40 +00:00
Peter Wemm
7f47668191 Slight reorg and added AMD64 support. A couple of the MODINFOMD_* values
that were added to sparc64 and later powerpc, really should have been in
the MI area.  But changing that now with insufficient preperation will
just cause too much pain.

Move MD_FETCH() to the MI sys/linker.h file to avoid another two copies
of it.
2003-05-01 03:31:18 +00:00
Peter Wemm
4580c352e1 KPT_MIN_ADDRESS and KPT_MAX_ADDRESS are not used anywhere. And if they
were, they are not safe to use outside of the kernel since these values
can change at kernel compile time - ie: we do not want them compiled into
userland binaries.
2003-05-01 00:10:38 +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
Jake Burkholder
14ce5bd49b Use inlines for loading and storing page table entries. Use cmpxchg8b for
the PAE case to ensure idempotent 64 bit loads and stores.

Sponsored by:	DARPA, Network Associates Laboratories
2003-04-28 20:35:36 +00:00
Alexander Kabaev
6fd839f9c7 Add a new sys/limits.h file which in turn depends on machine/_limits.h
to get actual constant values. This is in preparation for machine/limits.h
retirement.

Discussed on:	standards@
Submitted by:	Craig Rodrigues <rodrigc@attbi.com>  (*)
Modified by:	kan
2003-04-23 21:41:59 +00:00
David Xu
d1fc2022c3 Backout my last commit.
Requested by: bde
2003-04-20 01:35:21 +00:00
David Xu
2bdf11638e Don't return garbage in high 16 bits. 2003-04-19 02:40:39 +00:00
Maxime Henrion
141bacb048 Change the operation parameter of bus_dmamap_sync() from an
enum to an int and redefine the BUS_DMASYNC_* constants as
flags.  This allows us to specify several operations in one
call to bus_dmamap_sync() as in NetBSD.
2003-04-10 23:03:33 +00:00
Jake Burkholder
ac00210525 Remove invalid cast to vm_offset_t to avoid truncating a physical address
when doing pmap_kextract on a 2MB page.

Spotted by:	peter
Sponsored by:	DARPA, Network Associates Laboratories
2003-04-08 18:22:41 +00:00
Jake Burkholder
46ea68dd10 Better fix for previous previous which still allows the 4megs of kva at
the top of the address space to be reclaimed.  The problem is that with
the APTD gone the mapable kernel address space runs right to the end of
the 32 bit address space.  As a max this is 0x100000000, which can't be
represented in 32 bits, so we have to use ptd entry n-1 and pte offset
n-1, instead of ptd entry n and pte offset 0.  There's still 1 page we
can't use, but we gain just under 4 megs of kva (8 megs with PAE).

Sponsored by:	DARPA, Network Associates Laboratories
2003-04-07 14:27:19 +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
Poul-Henning Kamp
197e5e73ef Libdisk does not need to include <sys/diskslice.h> any more.
Move the remaining bits of <sys/diskslice.h> to <i386/include/bootinfo.h>

Move i386/pc98 specific bits from <sys/reboot.h> to
<i386/include/bootinfo.h> as well.

Adjust includes in sys/boot accordingly.
2003-04-04 16:35:16 +00:00
Jake Burkholder
d1d03c2b72 Bandaid fix for previous commit while I figure out why it broke. This
caused crashes early in boot on i386 UP machines.

Reported by:	phk
Pointy hat to:	jake
2003-04-04 10:09:44 +00:00
Jake Burkholder
163529c2b3 - Removed APTD and associated macros, it is no longer used.
BANG BANG BANG etc.

Sponsored by:	DARPA, Network Associates Laboratories
2003-04-03 23:44:35 +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
Poul-Henning Kamp
09bf42f50f Don't include <sys/buf.h> needlessly. 2003-04-01 09:02:58 +00:00
Jake Burkholder
7ab9b220d9 - Add support for PAE and more than 4 gigs of ram on x86, dependent on the
kernel opition 'options PAE'.  This will only work with device drivers which
  either use busdma, or are able to handle 64 bit physical addresses.

Thanks to Lanny Baron from FreeBSD Systems for the loan of a test machine
with 6 gigs of ram.

Sponsored by:	DARPA, Network Associates Laboratories, FreeBSD Systems
2003-03-30 05:24:52 +00:00
Jake Burkholder
de54353fb8 - Remove invalid casts.
Sponsored by:	DARPA, Network Associates Laboratories
2003-03-30 01:44:16 +00:00
Jake Burkholder
aea57872f0 - Convert all uses of pmap_pte and get_ptbase to pmap_pte_quick. When
accessing an alternate address space this causes 1 page table page at
  a time to be mapped in, rather than using the recursive mapping technique
  to map in an entire alternate address space.  The recursive mapping
  technique changes large portions of the address space and requires global
  tlb flushes, which seem to cause problems when PAE is enabled.  This will
  also allow IPIs to be avoided when mapping in new page table pages using
  the same technique as is used for pmap_copy_page and pmap_zero_page.

Sponsored by:	DARPA, Network Associates Laboratories
2003-03-30 01:16:19 +00:00
Paul Saab
87437b0b89 Nuke options HTT infavor of machdep.hlt_logical_cpus tunable/sysctl.
This keeps the logical cpu's halted in the idle loop.  By default
the logical cpu's are halted at startup.  It is also possible to
halt any cpu in the idle loop now using machdep.hlt_cpus.

Examples of how to use this:
machdep.hlt_cpus=1	halt cpu0
machdep.hlt_cpus=2	halt cpu1
machdep.hlt_cpus=4	halt cpu2
machdep.hlt_cpus=3	halt cpu0,cpu1

Reviewed by:	jhb, peter
2003-03-26 19:49:34 +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
1352a54255 Use __packed; 2003-03-24 20:44:39 +00:00
John Baldwin
a480c73063 Expand the APIC ID mask field of the ICR register to 8 bits intead of just
4 bits.  This reportedly fixes booting on the SW7500CW2.  Much thanks to
the submitter for tracking this down!

Submitted by:	Brian Buchanan <brian@ncircle.com>
Reviewed by:	peter
MFC after:	3 days
2003-03-17 19:14:13 +00:00
Jake Burkholder
5501d40bb9 Made the prototypes for pmap_kenter and pmap_kremove MD. These functions
are machine dependent because they are not required to update the tlb when
mappings are added or removed, and doing so is machine dependent.
In addition, an implementation may require that pages mapped with pmap_kenter
have a backing vm_page_t, which is not necessarily true of all physical
pages, and so may choose to pass the vm_page_t to pmap_kenter instead of the
physical address in order to make this requirement clear.
2003-03-16 04:16:03 +00:00
Jake Burkholder
2089c5c95e Use bus_space_handle_t to represent host port and virtual addresses;
bus_addr_t may not be appropriate.

Sponsored by:	DARPA, Network Associates Laboratories
2003-03-11 19:43:38 +00:00
John Baldwin
d7a715dc64 Wrap the hyperthreading support code with the HTT kernel option.
Hyperthreading support is now off unless the HTT option is added.

MFC-after:	3 days
2003-03-04 20:24:53 +00:00
Alan Cox
8480cd45a5 Remove some long unused declarations. (For example, the PV flags have not
been used since revision 1.8, roughly nine years ago.)
2003-02-27 20:13:20 +00:00
Maxime Henrion
f6c912dd0c Correctly set BUS_SPACE_MAXSIZE in all the busdma backends.
It was bogusly set to 64 * 1024 or 128 * 1024 because it was
bogusly reused in the BUS_DMAMAP_NSEGS definition.
2003-02-26 02:16:06 +00:00
Jake Burkholder
0f1a7e05a2 - Added inlines pmap_is_current, pmap_is_alternate and pmap_set_alternate
for testing and setting the current and alternate address spaces.
- Changed PTDpde and APTDpde to arrays to support multiple page directory
  pages.

ponsored by:	DARPA, Network Associates Laboratories
2003-02-25 19:40:21 +00:00
Jake Burkholder
5cd612b27e - Removed UMAXPTDI and UMAXPTEOFF.
- Changed VM_MAXUSER_ADDRESS to be defined in terms of PTDPTDI.  In order for
  assumptions about the recursive page table map to work it must be the base
  of the recursive map.  Any pte offset that's not NPTEPG will break these
  assumptions.

Sponsored by:	DARPA, Network Associates Laboratories
2003-02-24 20:29:52 +00:00
Yoshihiro Takahashi
2302407b21 The mpbiosreason variable does not used for pc98. 2003-02-24 14:36:03 +00:00
Tor Egge
07d2563244 Allow machines with one CPU and a valid mp table to boot an SMP kernel. 2003-02-23 23:49:57 +00:00
Jake Burkholder
ef49a94104 Previous commit missed a 1 that should be NGPTD, and an NPDEPG that should
be NPDEPTD.  Grumble.

Sponsored by:	DARPA, Network Associates Laboratories
2003-02-23 22:12:08 +00:00
Jake Burkholder
910548dea7 - Added macros NPGPTD, NBPTD, and NPDEPTD, for dealing with the size of the
page directory.
- Use these instead of the magic constants 1 or PAGE_SIZE where appropriate.
  There are still numerous assumptions that the page directory is exactly
  1 page.

Sponsored by:	DARPA, Network Associates Laboratories
2003-02-23 21:20:00 +00:00
Jake Burkholder
e29632c9e1 - Added macros PDESHIFT and PTESHIFT, use these instead of magic constants
in locore.
- Removed the macros PTESIZE and PDESIZE, use sizeof instead in C.

Sponsored by:	DARPA, Network Associates Laboratories
2003-02-23 09:45:50 +00:00
Alan Cox
01a06ce250 The root of the splay tree maintained within the pm_pteobj always refers
to the last accessed pte page.  Thus, the pm_ptphint is redundant and can
be removed.
2003-02-22 23:43:08 +00:00
Warner Losh
a163d034fa Back out M_* changes, per decision of the TRB.
Approved by: trb
2003-02-19 05:47:46 +00:00
Peter Wemm
af3d516f55 Initiate de-orbit burn for USE_PCI_BIOS_FOR_READ_WRITE. This has been
#if'ed out for a while.  Complete the deed and tidy up some other bits.

We need to be able to call this stuff from outer edges of interrupt
handlers for devices that have the ISR bits in pci config space.  Making
the bios code mpsafe was just too hairy.  We had also stubbed it out some
time ago due to there simply being too much brokenness in too many systems.
This adds a leaf lock so that it is safe to use pci_read_config() and
pci_write_config() from interrupt handlers.  We still will use pcibios
to do interrupt routing if there is no acpi.. [yes, I tested this]

Briefly glanced at by:  imp
2003-02-18 03:36:49 +00:00
Poul-Henning Kamp
f341ca9891 Remove #include <sys/dkstat.h> 2003-02-16 14:13:23 +00:00
Mike Barcroft
8cf5ed5125 Implement fpclassify():
o Add a MD header private to libc called _fpmath.h; this header
  contains bitfield layouts of MD floating-point types.
o Add a MI header private to libc called fpmath.h; this header
  contains bitfield layouts of MI floating-point types.
o Add private libc variables to lib/libc/$arch/gen/infinity.c for
  storing NaN values.
o Add __double_t and __float_t to <machine/_types.h>, and provide
  double_t and float_t typedefs in <math.h>.
o Add some C99 manifest constants (FP_ILOGB0, FP_ILOGBNAN, HUGE_VALF,
  HUGE_VALL, INFINITY, NAN, and return values for fpclassify()) to
  <math.h> and others (FLT_EVAL_METHOD, DECIMAL_DIG) to <float.h> via
  <machine/float.h>.
o Add C99 macro fpclassify() which calls __fpclassify{d,f,l}() based
  on the size of its argument.  __fpclassifyl() is never called on
  alpha because (sizeof(long double) == sizeof(double)), which is good
  since __fpclassifyl() can't deal with such a small `long double'.

This was developed by David Schultz and myself with input from bde and
fenner.

PR:		23103
Submitted by:	David Schultz <dschultz@uclink.Berkeley.EDU>
		(significant portions)
Reviewed by:	bde, fenner (earlier versions)
2003-02-08 20:37:55 +00:00
Poul-Henning Kamp
d1b40f007d i386/i386/tsc.c was repo-copied from i386/isa/clock.c.
Remove all the stuff that does not relate to the TSC.

Change the calibration to use DELAY(1000000) rather than trying to check
it against the CMOS RTC, this drastically increases precision:

Using 25 samples on a Athlon 700MHz UP machine I find:

                stddev          min          max        average
CMOS             22200 Hz    -74980 Hz     34301 Hz   704928721 Hz
DELAY             1805 Hz     -1984 Hz      2678 Hz   704937583 Hz

(The difference between the two averages is not statistically significant.)

expressed in PPM of the frequency:
                stddev          min          max
CMOS             31.49 PPM  -106.37 PPM    48.66 PPM
DELAY             2.56 PPM     2.81 PPM     3.80 PPM

This code will not be used until a followup commit to sys/isa/clock.c
and sys/pc98/pc98/clock.c which will only happen after some field testing.
2003-02-05 09:20:40 +00:00
Poul-Henning Kamp
553ebddc59 Make get_cyclecount() use binuptime() when no tsc is available: it is cheaper. 2003-02-05 08:55:10 +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
Julian Elischer
6f8132a867 Reversion of commit by Davidxu plus fixes since applied.
I'm not convinced there is anything major wrong with the patch but
them's the rules..

I am using my "David's mentor" hat to revert this as he's
offline for a while.
2003-02-01 12:17:09 +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
Scott Long
5193a34646 Implement bus_dmamem_alloc_size() and bus_dmamem_free_size() as
counterparts to bus_dmamem_alloc() and bus_dmamem_free().  This allows
the caller to specify the size of the allocation instead of it defaulting
to the max_size field of the busdma tag.

This is intended to aid in converting drivers to busdma.  Lots of
hardware cannot understand scatter/gather lists, which forces the
driver to copy the i/o buffers to a single contiguous region
before sending it to the hardware.  Without these new methods, this
would require a new busdma tag for each operation, or a complex
internal allocator/cache for each driver.

Allocations greater than PAGE_SIZE are rounded up to the next
PAGE_SIZE by contigmalloc(), so this is not suitable for multiple
static allocations that would be better served by a single
fixed-length subdivided allocation.

Reviewed by:	jake (sparc64)
2003-01-29 07:25:27 +00:00
Jake Burkholder
aff81a81d6 Remove BDE_DEBUGGER.
Discussed with:	bde
2003-01-28 19:05:44 +00:00
Julian Elischer
a18b6f65d0 Fix KSE related patch.
Make it compile for the SMP case..
statclock_process() has changed prototypes.
2003-01-26 21:32:08 +00:00
Peter Wemm
99ebb0bfba Clean up some junk defines, and GC the TPR options. 2003-01-23 01:04:27 +00:00
Peter Wemm
904639d710 Nuke CHEAP_TPR stuff, including LOPRIO_LEVEL (bogus) and ALLHWI_LEVEL
(which we never used).  There is no need to tweak the TPR anymore and
only causes problems.
2003-01-23 01:03:34 +00:00
John Baldwin
10deca7e68 - Move enable_sse()'s prototype to machine/md_var.h.
- Sort definition of cpu_* variables appropriately.
- Move cpu_fxsr out of the magic non-BSS set of variables and stick it in
  the BSS along with hw_instruction_sse (make the latter static as well).

Submitted by:	bde (partially)
2003-01-22 18:18:45 +00:00
John Baldwin
caf3197636 Rename cpuid_cpuinfo to cpu_procinfo. bde requested that I rename this
variable to something in the cpu_* namespace since that's what all the
other cpuid variables were named and cpu_procinfo is what I came up with.

Requested by:	bde
2003-01-22 17:54:12 +00:00
John Baldwin
f4e27c448b Bah, add in a missing space char I noticed when MFC'ing this. 2003-01-22 17:26:18 +00:00
Alfred Perlstein
44956c9863 Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.
Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT.
2003-01-21 08:56:16 +00:00
Marcel Moolenaar
9d683ffd4b o Move the contents of <machine/floatingpoint.h> over to
<machine/ieeefp.h> where it belongs.
o  Remove the i386 specific inclusion of <machine/floatingpoint.h>
   from <ieeefp.h>, now that including <machine/ieeefp.h> is enough
   for all architectures.
o  Allow <machine/ieeefp.h> to inline the functions exposed by the
   headers by checking for _IEEEFP_INLINED_ in the MI header. When
   defined, prototypes are not given and it is assumed that the MD
   headers, when inlining only a subset of the functions provide
   prototypes for the functions not being inlined.

Based on patch from: Terry Lambert <tlambert2@mindspring.com>
Tested with: make release.
2003-01-19 06:01:33 +00:00
Matthew N. Dodd
7534ac7ab7 A driver for the System Management Application Program
Interface (SMAPI) BIOS, which is present on some IBM
Thinkpad models (560, 600, 770 to name a few.)

The SMAPI BIOS provides access to System Information,
System Configuration, and Power Management.
2003-01-17 08:10:18 +00:00
John Baldwin
f85b149dae Rework part of the previous processor name changes so that we read
cpu_exthigh and cpu_brand in printcpuinfo() instead of in identify_cpu().
We also only do it for known-good values of cpu_vendor which is a bit more
conservative.

Reviewed by:	bde (mostly)
2003-01-09 19:54:49 +00:00
John Baldwin
26aa6d02bf - Add a cpu_exthigh variable to hold the highest extended cpuid value
returned from cpuid 0x80000000.
- Add a cpu_brand char array to hold the processor name returned by
  cpuid 0x80000002-0x80000004 on AMD, Intel, Transmeta, and possibly
  other CPUs.
- Use cpuid to set cpu_exthigh and read the processor name if it is present
  in identify_cpu().
2003-01-08 16:35:59 +00:00
John Baldwin
f4b4a64293 Enumerate logical hyperthread CPUs manually if they aren't already listed
in the mptable.  The way this works is that we determine if the system
has hyperthreading and how many logical CPU's should be in each physical
CPU by using the information returned by cpuid.  During the first pass of
the mptable, we build a bitmask of the APIC IDs of the CPUs listed in the
mptable.  We then scan that bitmask to see if the CPUs are already listed
by the mptable, or if there are any APIC IDs already in use that would
conflict with the APIC IDs of the logical CPUs.  If that test succeeds,
then we fixup the count of application processors.  Later on during the
second pass of the mptable we create fake processor entries for logical
CPUs and add them to the system.

We only need this type of fixup hack when using the mptable to enumerate
CPUs.  The ACPI MADT table properly enumerates all logical CPUs.
2003-01-08 01:33:18 +00:00
John Baldwin
fa896b7280 Add a cpuid_cpuinfo variable to hold the results of %ebx from cpuid with
%eax of 1 and set it in identify_cpu().
2003-01-08 01:20:05 +00:00
John Baldwin
72a1e0e226 - Fix the name of the hyperthreading cpuid feature flag to be HTT instead
of HHT.
- Document fields returned in %ebx by a cpuid with %eax of 1.
2003-01-08 01:15:26 +00:00
Jens Schweikhardt
9d5abbddbf Correct typos, mostly s/ a / an / where appropriate. Some whitespace cleanup,
especially in troff files.
2003-01-01 18:49:04 +00:00
Tim J. Robbins
b30a7779d4 MB_LEN_MAX is not MD, move it to the MI limits.h. 2002-12-22 06:38:45 +00:00
Daniel Eischen
a3dca4517e Align the FPU state in the ucontext and sigcontext to 16 bytes
to accomodate the new SSE/XMM floating point save/restore
instructions.

This commit is mostly from bde and includes some style nits.

Approved by:	re (jhb)
2002-12-02 19:58:55 +00:00
David E. O'Brien
6380ce4de1 Fix for non-GCC compilers.
Approved by:	re (jhb)
2002-11-27 16:28:18 +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
Alfred Perlstein
4ef42f2b0f Properly parenthesize the DBREG_DRX macro's variables to allow for
DBREG_DRX(&dbregs, n) usage.
2002-11-07 22:42:31 +00:00
David Xu
8c132e9fae 1.Fix smp race between kernel vm86 BIOS calling and userland vm86 mode code,
remove global variable in_vm86call, set vm86 calling flag in PCB flags.

2.Fix vm86 BIOS calling preempted problem by changing vm86_lock mutex type
  from MTX_DEF to MTX_SPIN. vm86pcb is not remembered in thread struct,
  when the thread calling vm86 BIOS is preempted by interrupt thread,
  and later switching back to the thread would cause incorrect context be
  loaded into CPU registers, this leads to kernel crash.
2002-11-07 01:34:23 +00:00
John Baldwin
ab79480392 Note that the sched_lock protects md_ldt of struct mdproc. 2002-10-25 20:06:16 +00:00
Peter Wemm
23eeeff7be Split 4.x and 5.x signal handling so that we can keep 4.x signal
handling clean and functional as 5.x evolves.  This allows some of the
nasty bandaids in the 5.x codepaths to be unwound.

Encapsulate 4.x signal handling under COMPAT_FREEBSD4 (there is an
anti-foot-shooting measure in place, 5.x folks need this for a while) and
finish encapsulating the older stuff under COMPAT_43.  Since the ancient
stuff is required on alpha (longjmp(3) passes a 'struct osigcontext *'
to the current sigreturn(2), instead of the 'ucontext_t *' that sigreturn
is supposed to take), add a compile time check to prevent foot shooting
there too.  Add uniform COMPAT_43 stubs for ia64/sparc64/powerpc.

Tested on: i386, alpha, ia64.  Compiled on sparc64 (a few days ago).
Approved by: re
2002-10-25 19:10:58 +00:00
Warner Losh
d793791855 Use the correct values for LDBL_*. Libc doesn't completely support
long doubles at the moment (printf truncates them to doubles).
However, long doubles to appear to work to the ranges listed in this
commit on both -stable (4.5) and -current.  There may be some slight
rounding issues with long doubles, but that's an orthogonal issue to
these constants.

I've had this in my local tree for 3 months, and in my company's local
tree for 15 months with no ill effects.

Obtained from: NetBSD
Not likely to like it: bde
2002-10-25 07:02:52 +00:00
Mark Murray
64f82235d8 Very minor whitespace/style nit. 2002-10-23 10:14:30 +00:00
Poul-Henning Kamp
50c026e579 Change the definition of the debugging registers to be an array, so
that we can index into it, rather than do pointer gymnastics on a
structure containing 8 elements.

Verified by:	MD5 hash on the produced .o files.
2002-10-20 20:48:56 +00:00
Jim Pirzyk
b2eb172cc3 Add the !define(COMPILING_LINT)
pass the pointy hat...

Requested by: Juli Mallett <jmallett@FreeBSD.org>
2002-10-17 18:17:28 +00:00
Jim Pirzyk
c8c1cf0ca7 put an #error directive when SMP and CPU_DISABLE_CMPXCHG are set
together.

Requested by: Lars Eggart <larse@isi.edu>
Enlighted how to do it by: John Baldwin <jhb@freebsd.org>
2002-10-17 05:51:36 +00:00
Poul-Henning Kamp
1eaae5cbe8 Be consistent about functions being static.
Spotted by:	FlexeLint.
2002-10-16 08:57:14 +00:00
Peter Wemm
af3f249f3a The a.out md_coredump stuff isn't referenced anywhere anymore, and
hasn't been filled in for ages..  Nuked.
2002-10-15 00:02:50 +00:00
Jim Pirzyk
77e8341280 Add a knob to turn on and off the CMPXCHG instruction on > i386 IA32 systems.
This is most beneficial for vmware client os installs.

Reviewed by: jmallet, iedowse, tlambert2@mindspring.com
MFC After: never, -STABLE does not currently use this instruction
2002-10-14 19:33:12 +00:00
Mike Barcroft
7a77412855 Add standards visibility conditionals. Change any uses of sigset_t to
struct __sigset to avoid depending on objects from <sys/signal.h>.
2002-10-13 00:31:46 +00:00
Mike Barcroft
ddb056b7d4 Add conditionals to allow va_list to be defined in other headers. 2002-10-06 22:02:06 +00:00
Mike Barcroft
0b058e3cbd o Add conditionals to allow va_list to be defined in other headers.
o Standardize on _MACHINE_STDARG_H_ to allow multiple header includes.
o Restrict the definition of va_copy() to C99 environments.
2002-10-06 22:01:07 +00:00
Mike Barcroft
e61d3b10d7 Fix namespace issues by using visibility conditionals from
<sys/cdefs.h>.
2002-10-05 05:47:56 +00:00
Mike Barcroft
085f8416a2 style(9) <machine/setjmp.h> headers so they look mostly the same. 2002-10-04 22:10:06 +00:00
Sam Leffler
14c17bd293 New bus_dma interfaces for use by crypto device drivers:
o bus_dmamap_load_mbuf
o bus_dmamap_load_uio

Test on i386.  Known to compile on alpha and sparc64, but not tested.
Otherwise untried.
2002-10-04 20:40:39 +00:00
Daniel Eischen
80047e95cf Add another temporary hack to allow running older i386 binaries.
This will be removed when new versions of syscalls sigreturn()
and sigaction() are added (mini is working on this but is in
the middle of a move).

This should fix the problem of cvsupd dying.
2002-10-04 14:50:55 +00:00
Bruce Evans
e0c386dd90 Removed bits related to MBRs now that they have a proper home in
<sys/diskmbr.h>.
2002-10-02 03:29:00 +00:00
Poul-Henning Kamp
c2b6013026 It is too much work convincing lint why we would want empty structures,
so make the non-empty #ifdef lint.
2002-10-01 14:08:08 +00:00
Poul-Henning Kamp
0d5858f265 Use long long to indicate 64bitness in #ifdef lint. 2002-10-01 14:07:18 +00:00
Poul-Henning Kamp
7e9bac35e2 A more lint friendly #ifdef lint section. 2002-10-01 14:01:58 +00:00
David E. O'Brien
dbe57134ec Turn back on the "SMP: AP CPU #N Launched!" message on normal boots.
Peter's rev 1.189 should fix the lost console on SCSI-based systems due
to this message.
2002-09-30 15:39:57 +00:00
David E. O'Brien
469541bfde Only print out the "SMP: AP CPU #N Launched!" message on verbose boots.
The kernel printf() isn't race-free
2002-09-30 07:03:16 +00:00
Peter Wemm
feea0ab05b There is no need for start/num to be signed in i386_ldt_args. 2002-09-28 20:42:04 +00:00
Peter Wemm
bbe04fe2ca ISMEMSDP(), IS286GDP(), IS386GDP(), ISGDP(), ISSDP() and ISSYSSDP() are
not used anywhere anymore.
2002-09-26 05:07:41 +00:00
Mark Murray
82e5cdeb6e Fix a declaration that is actually supposed to be a macro definition.
Submitted by:	marius@alchemy.franken.de
2002-09-25 13:46:23 +00:00
Alfred Perlstein
4f492bfab5 use __packed. 2002-09-23 18:54:32 +00:00
John Baldwin
58eab4797a Update the nexus driver for the addition of the legacy driver:
- nexus no longer has PCI bridges as direct children, so the PCI bus
  ivar is no longer used and is removed.
- Don't attach default EISA, ISA, or MCA busses.  Instead, if we do not
  have an acpi0 device after bus_generic_probe(), add a legacy0 child
  device.
- Remove machine/nexusvar.h.
2002-09-23 16:03:00 +00:00
John Baldwin
e8e951ce31 Add a new legacy(4) device driver for use on machines that do not have
ACPI or for when ACPI support is disabled or not present in the kernel.
Basically, the nexus device is now split into two with some parts
(such as adding default ISA, MCA, and EISA busses if they aren't found
as well as support for PCI bus device ivars) being moved to the legacy
driver.
2002-09-23 15:50:06 +00:00
Peter Wemm
1a8ec9c55a PIC_GOTOFF is OBE. 2002-09-23 07:27:45 +00:00
Peter Wemm
691cb905d6 use __packed, rather than __attribute__((packed)). 2002-09-23 06:50:07 +00:00
Peter Wemm
c692fbe091 At great personal risk, add a __packed and __aligned(x) define that
expand to __attribute__((packed)) and __attribute__((aligned(x)))
respectively.  Replace the handful of gcc-ism's that use
__attribute__((aligned(16))) etc around the kernel with __aligned(16).

There are over 400 __attribute__((packed)) to deal with, that can come
later.  I just want to use __packed in new code rather than add more
gcc-ism's.
2002-09-23 05:55:10 +00:00
Peter Wemm
79af999017 Delete a whole bunch of compatability defines that we dont use anymore. 2002-09-23 05:04:05 +00:00
Mike Barcroft
c0d4804d67 Be careful not to define GCC-specific optimizations in the non-GCC
case.
2002-09-23 04:32:17 +00:00
Peter Wemm
eb1443c8dd Create inlines for ltr(sel), lldt(sel), lidt(addr) rather than
functions that have one instruction.
2002-09-22 04:45:21 +00:00
Mark Murray
d7ee442578 Provide in inline function for the (GNUC) assembler "hlt" instruction. 2002-09-21 18:26:53 +00:00
Peter Wemm
ea5d4bd842 Repo copied to <sys/smbus/smb.h> 2002-09-19 04:13:43 +00:00
Peter Wemm
37e255de3f Repo copied to <sys/iicbus/iic.h> 2002-09-19 04:13:29 +00:00
Mike Barcroft
86954511d2 Implement C99's va_copy() macro. 2002-09-18 07:33:16 +00:00
Peter Wemm
66422f5b7a Initiate deorbit burn for the i386-only a.out related support. Moves are
under way to move the remnants of the a.out toolchain to ports.  As the
comment in src/Makefile said, this stuff is deprecated and one should not
expect this to remain beyond 4.0-REL.  It has already lasted WAY beyond
that.

Notable exceptions:
gcc - I have not touched the a.out generation stuff there.
ldd/ldconfig - still have some code to interface with a.out rtld.
old as/ld/etc - I have not removed these yet, pending their move to ports.
some includes - necessary for ldd/ldconfig for now.

Tested on: i386 (extensively), alpha
2002-09-17 01:49:00 +00:00
Jonathan Mini
9ba1547929 Add kernel support needed for the KSE-aware libpthread:
- Maintain fpu state across signals.
	- Save and restore FPU state properly in ucontext_t's.

Reviewed by:	deischen, julian
Approved by:	-arch
2002-09-16 19:25:41 +00:00
John Baldwin
c3ba1376f5 Add a function pci_probe_route_table() that returns true if our PCI BIOS
supports interrupt routing and if the specified PCI bus is present in the
routing table.
2002-09-06 22:15:44 +00:00
John Baldwin
8ab96fd8d0 - Add a pci_cfgintr_valid() function to see if a given IRQ is a valid
IRQ for an entry in a PCIBIOS interrupt routing ($PIR) table.
- Change pci_cfgintr() to except the current IRQ of a device as a fourth
  argument and to use that IRQ for the device if it is valid.
- If an intpin entry in a $PIR entry has a link of 0, it means that that
  intpin isn't connected to anything that can trigger an interrupt.  Thus,
  test the link against 0 to find invalid entries in the table instead of
  implicitly relying on the irqs field to be zero.  In the machines I have
  looked at, intpin entries with a link of 0 often have the bits for all
  possible interrupts for PCI devices set.
2002-09-06 17:08:07 +00:00
John Baldwin
4f99a443f0 Function prototypes don't need 'extern'. 2002-09-04 19:31:09 +00:00
Mike Barcroft
dd1b6791a8 Now that _BSD_CLK_TCK_ and _BSD_CLOCKS_PER_SEC_ are the same on all
architectures, move the definition directly into <time.h> and finish
the removal of <machine/ansi.h>.
2002-09-03 00:06:58 +00:00
Matthew Dillon
ec61f55d42 Reduce the maximum KVA reserved for swap meta structures from 70 to 32 MB.
Reduce the swap meta calculation by a factor of 2, it's still massive overkill.

X-MFC after: immediately
2002-08-31 21:15:29 +00:00
Peter Wemm
447b3772dc Change hw.physmem and hw.usermem to unsigned long like they used to be
in the original hardwired sysctl implementation.

The buf size calculator still overflows an integer on machines with large
KVA (eg: ia64) where the number of pages does not fit into an int.  Use
'long' there.

Change Maxmem and physmem and related variables to 'long', mostly for
completeness.  Machines are not likely to overflow 'int' pages in the
near term, but then again, 640K ought to be enough for anybody.  This
comes for free on 32 bit machines, so why not?
2002-08-30 04:04:37 +00:00
Jake Burkholder
bafbd49201 Renamed poorly named setregs to exec_setregs. Moved its prototype to
imgact.h with the other exec support functions.
2002-08-29 06:17:48 +00:00
Peter Wemm
97e2d5fc53 OK, I have had it with losing my console because the AP's print their "I am
alive!" message right as the scsi probe messages happen.  This is a bit
nasty, but it seems to work.  At the point that we unlock the AP's, briefly
wait till they are all done while we hold the console on their behalf.
2002-08-28 23:24:05 +00:00
Mike Barcroft
bd8e0716d9 Move several MI types from <machine/_types.h> to <sys/_types.h>.
These types are unlikely to ever become very MD.  They include:
clockid_t, ct_rune_t, fflags_t, intrmask_t, mbstate_t, off_t, pid_t,
rune_t, socklen_t, timer_t, wchar_t, and wint_t.

While moving them, make a few adjustments (submitted by bde):
o __ct_rune_t needs to be precisely `int', not necessarily __int32_t,
  since the arg type of the ctype functions is int.
o __rune_t, __wchar_t and __wint_t inherit this via a typedef of
  __ct_rune_t.
o Some minor wording changes in the comment blocks for ct_rune_t and
  mbstate_t.

Submitted by:	bde (partially)
2002-08-23 16:49:06 +00:00
Mike Barcroft
fb6cc33daf Make __clock_t use `unsigned long' rather than a fixed 32-bit integer
so that it changes to the correct size in IP32L64 mode.  Other
architectures don't have this issue.
2002-08-22 00:28:24 +00:00
Mike Barcroft
abbd890233 o Merge <machine/ansi.h> and <machine/types.h> into a new header
called <machine/_types.h>.
o <machine/ansi.h> will continue to live so it can define MD clock
  macros, which are only MD because of gratuitous differences between
  architectures.
o Change all headers to make use of this.  This mainly involves
  changing:
    #ifdef _BSD_FOO_T_
    typedef	_BSD_FOO_T_	foo_t;
    #undef _BSD_FOO_T_
    #endif
  to:
    #ifndef _FOO_T_DECLARED
    typedef	__foo_t	foo_t;
    #define	_FOO_T_DECLARED
    #endif

Concept by:	bde
Reviewed by:	jake, obrien
2002-08-21 16:20:02 +00:00
Maxime Henrion
579bb37015 Use the __BUS_ACCESSOR macro for NEXUS_ACCESSOR
instead of rolling our own implementation.

Reviewed by:	tmm
2002-08-20 13:50:17 +00:00
Hellmuth Michaelis
866a3fa2bf add support properly displaying and logging incoming telephone numbers (MSNs)
by looking at the "type of number" field and providing configurable hooks
to correct the numbers accordingly. See keywords add-prefix, prefix-national
and prefix-international in isdnd.rc(5).
This feature was implemented by Christian Ullrich <chris@chrullrich.de>
2002-08-12 07:53:55 +00:00
Hellmuth Michaelis
9ed6ae76c7 add experimental support for Data over Voice (DoV) outgoing calls.
based on patches received from Guy Ellis (guy@traverse.com.au),
Chris Collins (xfire@xware.cx) and Phillip Musumeci (phillip@cs.jcu.edu.au).
2002-08-11 15:47:26 +00:00
Alan Cox
8365d52166 o Introduce pmap_page_is_mapped(). Its purpose is to obsolete
the PG_MAPPED flag.
2002-08-05 03:40:28 +00:00
Poul-Henning Kamp
14a3a6ea0b Move a prototype to the least wrong place.
Suggested by:	bde
2002-08-02 18:45:43 +00:00
Poul-Henning Kamp
ab4db9b74f The Elan SC520 MMCR is actually 16bit wide, so u_char is inconvenient. 2002-07-31 13:45:44 +00:00
Mitsuru IWASAKI
b69ed3f4c6 Resolve conflicts arising from the ACPI CA 20020725 import. 2002-07-30 19:35:32 +00:00
Mike Barcroft
49545b3891 Create a new header <machine/_stdint.h> for storing MD parts of
<stdint.h>.  Previously, parts were defined in <machine/ansi.h> and
<machine/limits.h>.  This resulted in two problems:
  (1) Defining macros in <machine/ansi.h> gets in the way of that
      header only defining types.
  (2) Defining C99 limits in <machine/limits.h> adds pollution to
      <limits.h>.
2002-07-29 17:41:23 +00:00
Peter Wemm
e344afe7c9 Move SWTCH_OPTIM_STATS related code out of cpufunc.h. (This sort of stat
gathering is not an x86 cpu feature)
2002-07-21 05:22:16 +00:00
Mark Murray
4c5aee92a7 Beautify. This has the side effect of improving portability and
making lint work cleaner.

Inspired to do this by:	jhb
2002-07-18 15:56:46 +00:00
Poul-Henning Kamp
61658cf6a1 Add initialization code for the AMD Elan sc520 which maps the MMCR
into KVM and sets the i8254 frequency to the correct value.
2002-07-18 12:56:54 +00:00
Mark Murray
8306a37bbb Clean up the syntax WRT semicolons at the end of function-like-macros, and protect GCCisms from non-GNU compilers and lint. 2002-07-17 16:19:37 +00:00
Mark Murray
80a0ead4fe Wrap GNU specific code in ifdefs, and help lint out by providing
some alternative definitions.
2002-07-15 13:29:40 +00:00
Mark Murray
7e622d3c84 Cast to prevent "signed/unsigned comparison" warnings. 2002-07-15 13:27:43 +00:00
Mark Murray
bbcfaa6aa0 Warnings and lint-assisting fixes; mark unused function parameters as
unused; wrap GNUisms (asm code) in appropriate #ifdefs.
2002-07-15 13:25:15 +00:00
Peter Wemm
f1b665c8fe Revive backed out pmap related changes from Feb 2002. The highlights are:
- It actually works this time, honest!
- Fine grained TLB shootdowns for SMP on i386.  IPI's are very expensive,
  so try and optimize things where possible.
- Introduce ranged shootdowns that can be done as a single IPI.
- PG_G support for i386
- Specific-cpu targeted shootdowns.  For example, there is no sense in
  globally purging the TLB cache for where we are stealing a page from
  the local unshared process on the local cpu.  Use pm_active to track
  this.
- Add some instrumentation for the tlb shootdown code.
- Rip out SMP code from <machine/cpufunc.h>
- Try and fix some very bogus PG_G and PG_PS interactions that were bad
  enough to cause vm86 bios calls to break.  vm86 depended on our existing
  bugs and this was the cause of the VESA panics last time.
- Fix the silly one-line error that caused the 'panic: bad pte' last time.
- Fix a couple of other silly one-line errors that should have caused more
  pain than they did.

Some more work is needed:
- pmap_{zero,copy}_page[_idle].  These can be done without IPI's if we
  have a hook in cpu_switch.
- The IPI handlers need some cleanup.  I have a bogus %ds load that can
  be avoided.
- APTD handling is rather bogus and appears to be a large source of
  global TLB IPI shootdowns for no really good reason.

I see speedups of between 1.5% and ~4% on buildworlds in a while 1 loop.
I expect to see a bigger difference when there is significant pageout
activity or the system otherwise has memory shortages.

I have backed out a few optimizations that I had been using over the last
few days in order to be a little more conservative.  I'll revisit these
again over the next few days as the dust settles.

New option:  DISABLE_PG_G - In case I missed something.
2002-07-12 07:56:11 +00:00
Peter Wemm
da035a22eb Bah, move the invltlb counter to C code and hook a debug sysctl onto it. 2002-07-11 08:31:10 +00:00
Matthew Dillon
50b6a55512 Remove the critmode sysctl - the new method for critical_enter/exit (already
the default) is now the only method for i386.

Remove the paraphanalia that supported critmode.  Remove td_critnest, clean
up the assembly, and clean up (mostly remove) the old junk from
cpu_critical_enter() and cpu_critical_exit().
2002-07-10 20:15:58 +00:00
Mike Barcroft
f889202ba4 Remove label_t and physadr, which seem to have never been used in
FreeBSD.

Submitted by:	bde
2002-07-10 15:47:59 +00:00
Mike Barcroft
a6519e64cc Move the type definition of ointhand2_t from i386/include/types.h to
i386/isa/isa_device.h.  This is a more appropriate location and
helps restrict <machine/types.h> to only types that exist on all
platforms.
2002-07-09 01:16:18 +00:00
Mike Barcroft
ba5fe51088 Move __offsetof() macro from <machine/ansi.h> to <sys/cdefs.h>. It's
hardly MD, since all our platforms share the same macro.  It's not
really compiler dependent either, but this helps in reducing
<machine/ansi.h> to only type definitions.
2002-07-08 16:43:35 +00:00
Peter Wemm
a20ae49f93 Remove #define APIC_INTR_HIGHPRI_CLOCK - this is no longer used
(see i386/isa/intr_machdep.c 1.72)
2002-07-08 09:14:01 +00:00
Peter Wemm
fcdc053233 Cosmetic. Remove #if 0 definition of vtophys() - it predates 4MB pages.
Remove avtophys(), it isn't referenced anywhere.
2002-07-08 08:14:28 +00:00
Mike Barcroft
a19d429398 Since printf(3) now supports the `j' conversion specifier, use that
when printing intmax_t and uintmax_t.

Forgotten by:	mike
Noticed by:	bde
2002-06-30 05:48:03 +00:00
Julian Elischer
44990b8cb8 Add files that are new for KSE. 2002-06-29 07:04:59 +00:00
Ian Dowse
2f384b348a Make vm_pindex_t 64-bit on all platforms. This is necessary to avoid
overflows with the large file sizes that UFS2 permits.

Reviewed by:	dillon, alc, tegge
2002-06-23 21:57:19 +00:00
Mark Peek
73cb22707a Add additional cpuid feature flags and put into a canonical format.
MFC after:	1 week
2002-06-22 23:00:33 +00:00
John Polstra
d5de6c2a5f Fix several bugs in the i386 asm statements used to speed up Internet
checksumming.  These bugs could possibly cause bad code to be
generated at elevated optimization levels.

First, eliminate the use of preprocessor magic to form the address
fields of asm instructions.  It hid the actual addresses being
referenced from the compiler.  Without knowledge of all the data
dependencies, the compiler might possibly use optimizations which
would result in incorrect code.

Use "__asm __volatile" rather than "__asm" for instruction sequences
that pass information through the condition codes (the carry bit, in
this case).  Without __volatile, the compiler might add unrelated
code between consecutive __asm instructions, modifying the condition
codes.  I have seen GCC insert stack pointer adjustments in this
way, for example.  Unfortunately, GCC doesn't provide a way to
specify dependencies on the condition codes.  You can specify that
they are clobbered, but not that you are going to use them as input.

Finally, simplify the LOAD macro.  This macro is used as a poor
man's prefetch.  The simpler version gives the compiler more leeway
about just how it performs the prefetch.

MFC after:	1 week
2002-06-22 22:35:53 +00:00
Peter Wemm
2f9267ec23 Move the "- 1" into the RQB_FFS(mask) macro itself so that
implementations can provide a base zero ffs function if they wish.
This changes
  #define RQB_FFS(mask) (ffs64(mask))
  foo = RQB_FFS(mask) - 1;
to
  #define RQB_FFS(mask) (ffs64(mask) - 1)
  foo = RQB_FFS(mask);
On some platforms we can get the "- 1" for free, eg: those that use the
C code for ffs64().

Reviewed by:	jake (in principle)
2002-06-20 06:21:20 +00:00
Jens Schweikhardt
21dc7d4f57 Fix typo in the BSD copyright: s/withough/without/
Spotted and suggested by:	des
MFC after:	3 weeks
2002-06-02 20:05:59 +00:00
Alfred Perlstein
50225e2f48 Silence preprocessor warning, No need to use CONCAT with "," and "word". 2002-06-01 20:22:33 +00:00
Bruce Evans
136956ed12 Fixed the return value of fpsetmask(). The API requires inversion of the
mask on both input and output to fpsetmask(), but this was only done for
input, so fpsetmask() returned the complement of the old mask (ANDed with
the mask bitfield).

PR:		38170
MFC after:	4 weeks
2002-06-01 17:39:46 +00:00
Bruce Evans
511dab6218 Fixed style bugs in rev.1.9. 2002-06-01 17:27:16 +00:00
Doug Rabson
99bd783419 Move the definition of ElfN_Hashelt to common headers. The only platform
which has a different definition for this is alpha.
2002-05-30 08:32:18 +00:00
Jake Burkholder
d2ac231616 Make the run queue parameters machine dependent. Optimize 64 bit
architectures by using a 64 bit word for the bit array which keeps
track of non-empty queues.

Reviewed by:	peter
2002-05-25 01:12:23 +00:00
John Baldwin
6b8c698908 Rename pause() to ia32_pause() so it doesn't conflict with the pause()
function defined in <unistd.h>.  I didn't #ifdef _KERNEL it because the
mutex implementation in libpthread will probably need this.
2002-05-22 20:32:39 +00:00
John Baldwin
07508f90b6 Debug registers aren't selectors, so use saner names for the variables in
the inline functions for reading and writing the debug registers.
2002-05-22 13:29:18 +00:00
John Baldwin
2be69f326a - Sort the pause() inline into the appropriate location.
- Add many missing prototypes to the non-GCC section.
2002-05-22 13:27:05 +00:00
John Baldwin
0228ea4e0b Rename cpu_pause() to pause(). Originally I was going to make this an
MI API with empty cpu_pause() functions on other arch's, but this
functionality is definitely unique to IA-32, so I decided to leave it
as i386-only and wrap it in #ifdef's.  I should have dropped the cpu_
prefix when I made that decision.

Requested by:	bde
2002-05-22 13:19:22 +00:00
John Baldwin
bb0d293f15 Add an inline function cpu_pause() for the IA32 'pause' instruction. 2002-05-21 20:21:53 +00:00
Yoshihiro Takahashi
9b96eed728 Remove unneeded ## for GCC 3.1 2002-05-21 12:50:20 +00:00
Poul-Henning Kamp
6380601f64 Move MI stuff out of MD param.h files.
It can all still be overridden in the MD files should need suddenly arise.
2002-05-14 20:35:29 +00:00
David E. O'Brien
10cd195e63 I reorganized a little bit too much in the backwards case. 2002-05-10 03:24:06 +00:00
David E. O'Brien
fc336fdfbb Gcc 3.1 varargs support. 2002-05-10 02:02:54 +00:00
Peter Wemm
db17c6fc07 Tidy up some loose ends.
i386/ia64/alpha - catch up to sparc64/ppc:
- replace pmap_kernel() with refs to kernel_pmap
- change kernel_pmap pointer to (&kernel_pmap_store)
  (this is a speedup since ld can set these at compile/link time)
all platforms (as suggested by jake):
- gc unused pmap_reference
- gc unused pmap_destroy
- gc unused struct pmap.pm_count
(we never used pm_count - we track address space sharing at the vmspace)
2002-04-29 07:43:16 +00:00
Mark Murray
db8f2e326c Stylify (mainly line up macro EOL-continuation \'s), and add a dummy
alternative for lint.
2002-04-21 10:49:00 +00:00
Tor Egge
de8218bb7b Fix typo in adjusted panic message.
Submitted by:	cokane
2002-04-17 22:41:58 +00:00
Tor Egge
50c15af4da Update io_apic_ints array properly when revoking an irq mapping.
Adjust panic message.

Submitted by:	David Xu <bsddiy@yahoo.com>
2002-04-17 18:27:10 +00:00
David Malone
a983fdfe4c Move do_cpuid into the correct place in this file and make
the indentation more like the other multi-line assembley in
this file.

Someone who understands gcc constraints could update the
constraints for do_cpuid.
2002-04-10 21:18:46 +00:00
Mike Barcroft
49285705cc Remove the hack for segsz_t from <sys/types.h>; use the normal
_BSD_FOO_T_ method for defining segsz_t.
2002-04-10 15:58:13 +00:00
Mike Barcroft
7f0f1cfd57 Add manifest constants: _LITTLE_ENDIAN, _BIG_ENDIAN, _PDP_ENDIAN, and
_BYTE_ORDER.  These are far more useful than their non-underscored
equivalents as these can be used in restricted namespace environments.
Mark the non-underscored variants as deprecated.
2002-04-10 14:39:14 +00:00
Poul-Henning Kamp
2ce7d7a033 GC various bits and pieces of USERCONFIG from all over the place. 2002-04-09 11:18:46 +00:00
Poul-Henning Kamp
1aec374128 machine/uc_device.h was only here for USERCONFIG and kget(1).
We have neither anymore.
2002-04-09 11:04:42 +00:00
John Baldwin
6008862bc2 Change callers of mtx_init() to pass in an appropriate lock type name. In
most cases NULL is passed, but in some cases such as network driver locks
(which use the MTX_NETWORK_LOCK macro) and UMA zone locks, a name is used.

Tested on:	i386, alpha, sparc64
2002-04-04 21:03:38 +00:00
Matthew Dillon
182da8209d Stage-2 commit of the critical*() code. This re-inlines cpu_critical_enter()
and cpu_critical_exit() and moves associated critical prototypes into their
own header file, <arch>/<arch>/critical.h, which is only included by the
three MI source files that need it.

Backout and re-apply improperly comitted syntactical cleanups made to files
that were still under active development.  Backout improperly comitted program
structure changes that moved localized declarations to the top of two
procedures.  Partially re-apply one of the program structure changes to
move 'mask' into an intermediate block rather then in three separate
sub-blocks to make the code more readable.  Re-integrate bug fixes that Jake
made to the sparc64 code.

Note: In general, developers should not gratuitously move declarations out
of sub-blocks.  They are where they are for reasons of structure, grouping,
readability, compiler-localizability, and to avoid developer-introduced bugs
similar to several found in recent years in the VFS and VM code.

Reviewed by:	jake
2002-04-01 23:51:23 +00:00
John Baldwin
e6c838590e GC #if 0'd assembly mutex micro operations. If someone wants to bring
these back later then can get them from the attic.  Also, GC, some stale
macros to acquire and release sleep mutexes in assembly.
2002-03-28 15:14:23 +00:00
Matthew Dillon
d74ac6819b Compromise for critical*()/cpu_critical*() recommit. Cleanup the interrupt
disablement assumptions in kern_fork.c by adding another API call,
cpu_critical_fork_exit().  Cleanup the td_savecrit field by moving it
from MI to MD.  Temporarily move cpu_critical*() from <arch>/include/cpufunc.h
to <arch>/<arch>/critical.c (stage-2 will clean this up).

Implement interrupt deferral for i386 that allows interrupts to remain
enabled inside critical sections.  This also fixes an IPI interlock bug,
and requires uses of icu_lock to be enclosed in a true interrupt disablement.

This is the stage-1 commit.  Stage-2 will occur after stage-1 has stabilized,
and will move cpu_critical*() into its own header file(s) + other things.
This commit may break non-i386 architectures in trivial ways.  This should
be temporary.

Reviewed by:	core
Approved by:	core
2002-03-27 05:39:23 +00:00
Hellmuth Michaelis
3c1d185c2a Add support for Q.931 subaddresses.
Submitted by: Steven Looman <fsteevie@wish.net>
2002-03-26 15:13:54 +00:00
David E. O'Brien
c543d983fa Guard against redefining __gnuc_va_list. 2002-03-24 11:25:46 +00:00
Bruce Evans
809dbbc99b Fixed some style bugs in the removal of __P(()). The main ones were
not removing tabs before "__P((", and not outdenting continuation lines
to preserve non-KNF lining up of code with parentheses.  Switch to KNF
formatting and/or rewrap the whole prototype in some cases.
2002-03-23 15:09:35 +00:00
Bruce Evans
fa9c948c1c Fixed some style bugs in the removal of __P(()). The main ones were
not removing tabs before "__P((", and not outdenting continuation lines
to preserve non-KNF lining up of code with parentheses.  Switch to KNF
formatting and/or rewrap the whole prototype in some cases.
2002-03-23 14:27:06 +00:00
David E. O'Brien
439a4003ab ASM versions of __FBSDID. 2002-03-23 02:01:27 +00:00
Warner Losh
ba74981e71 Fix abuses of cpu_critical_{enter,exit} by converting to
intr_{disable,restore} as well as providing an implemenation of
intr_{disable,restore}.

Reviewed by: jake, rwatson, jhb
2002-03-21 06:19:08 +00:00
Warner Losh
e7b110dcf7 Fix minor style(9) violation in de__Ping 2002-03-20 19:04:56 +00:00
Alfred Perlstein
15fe306743 Remove __P. 2002-03-20 08:56:31 +00:00
Alfred Perlstein
b63dc6ad47 Remove __P. 2002-03-20 05:48:58 +00:00
Hellmuth Michaelis
e0d83003c4 Clean up the i4b kernel part: remove unmaintained #if(def)s for NetBSD,
OpenBSD and BSD/OS and respective code, remove pre $FreeBSD CVS id's,
remove #if(def)s and respective code for FreeBSD versions < 5 .
2002-03-17 09:33:15 +00:00
Dag-Erling Smørgrav
a2e0658045 Move the definition of PT_[GS]ET{,DB,FP}REGS from the MD ptrace.h to the
MI ptrace.h, since all platforms define them.  Keep the MD ptrace.h around
for FIX_SSTEP (which is currently only needed on Alpha).
2002-03-16 00:25:53 +00:00
Mike Barcroft
d846855da8 o Don't require long long support in bswap64() functions.
o In i386's <machine/endian.h>, macros have some advantages over
  inlines, so change some inlines to macros.
o In i386's <machine/endian.h>, ungarbage collect word_swap_int()
  (previously __uint16_swap_uint32), it has some uses on i386's with
  PDP endianness.

Submitted by:	bde

o Move a comment up in <machine/endian.h> that was accidentially moved
  down a few revisions ago.
o Reenable userland's use of optimized inline-asm versions of
  byteorder(3) functions.
o Fix ordering of prototypes vs. redefinition of byteorder(3)
  functions, so that the non-GCC (libc asm) case has proper
  prototypes.
o Add proper prototypes for byteorder(3) functions in <sys/param.h>.
o Prevent redundant duplicate prototypes by making use of the
  _BYTEORDER_PROTOTYPED define.
o Move the bswap16(), bswap32(), bswap64() C functions into MD space
  for platforms in which asm versions don't exist.  This significantly
  reduces the complexity of some things at the cost of duplicate code.

Reviewed by:	bde
2002-03-09 21:02:16 +00:00
Hellmuth Michaelis
a6cd6fedf9 after joerg's recent merge of i4b's sppp with the main sppp, remove
now obsolete file.
2002-03-09 13:31:56 +00:00
Jake Burkholder
752dff3d9c Add needed includes of machine/smp.h, remove nested include in sys/smp.h
so that inlines in machine/smp.h can use variables declared in sys/smp.h.
2002-03-07 04:43:51 +00:00
Jeff Roberson
88c99cfbc8 Add a new variable mp_maxid. This is used so that per cpu datastructures may
be allocated as arrays indexed by the cpu id.  Previously the only reliable
way to know the max cpu id was through MAXCPU. mp_ncpus isn't useful here
because cpu ids may be sparsely mapped, although x86 and alpha do not do this.

Also, call cpu_mp_probe much earlier so the max cpu id is known before the VM
starts up.  This is intended to help support per cpu queues for the new
allocator, but may be useful elsewhere.

Reviewed by:	jake
Approved by:	jake
2002-03-05 10:01:46 +00:00
Mark Murray
f5d9a10b94 Make it a bit clearer where this file is to be used and where it
should not be. (Comments only)

Inspired by:	bde
2002-02-28 18:26:30 +00:00
Bosko Milekic
71acb2477f Make MPLOCKED work again in asm files and stringify it explicitly
where necessary.

Reviewed by: jake
2002-02-28 06:17:05 +00:00
John Baldwin
62da23f1e2 Back out part of KSE/M2 that snuck in under the radar: changing the
prototype of bzero() on the i386 to have a volatile first argument.

Requested by:	bde, jake
2002-02-27 22:12:29 +00:00
Thomas Moestl
90ce56c287 Add the following functions/macros to support byte order conversions and
device drivers for bus system with other endinesses than the CPU (using
interfaces compatible to NetBSD):

- bwap16() and bswap32(). These have optimized implementations on some
  architectures; for those that don't, there exist generic implementations.
- macros to convert from a certain byte order to host byte order and vice
  versa, using a naming scheme like le16toh(), htole16().
  These are implemented using the bswap functions.
- stream bus space access functions, which do not perform a byte order
  conversion (while the normal access functions would if the bus endianess
  differs from the CPU endianess).

htons(), htonl(), ntohs() and ntohl() are implemented using the new
functions above for kernel usage. None of the above interfaces is currently
exported to user land.

Make use of the new functions in a few places where local implementations
of the same functionality existed.

Reviewed by:	mike, bde
Tested on alpha by:	mike
2002-02-27 17:16:18 +00:00
Peter Wemm
d1693e1701 Back out all the pmap related stuff I've touched over the last few days.
There is some unresolved badness that has been eluding me, particularly
affecting uniprocessor kernels.  Turning off PG_G helped (which is a bad
sign) but didn't solve it entirely.  Userland programs still crashed.
2002-02-27 09:51:33 +00:00
Matthew Dillon
181df8c9d4 revert last commit temporarily due to whining on the lists. 2002-02-26 20:33:41 +00:00
Matthew Dillon
f96ad4c223 STAGE-1 of 3 commit - allow (but do not require) interrupts to remain
enabled in critical sections and streamline critical_enter() and
critical_exit().

This commit allows an architecture to leave interrupts enabled inside
critical sections if it so wishes.  Architectures that do not wish to do
this are not effected by this change.

This commit implements the feature for the I386 architecture and provides
a sysctl, debug.critical_mode, which defaults to 1 (use the feature).  For
now you can turn the sysctl on and off at any time in order to test the
architectural changes or track down bugs.

This commit is just the first stage.  Some areas of the code, specifically
the MACHINE_CRITICAL_ENTER #ifdef'd code, is strictly temporary and will
be cleaned up in the STAGE-2 commit when the critical_*() functions are
moved entirely into MD files.

The following changes have been made:

	* critical_enter() and critical_exit() for I386 now simply increment
	  and decrement curthread->td_critnest.  They no longer disable
	  hard interrupts.  When critical_exit() decrements the counter to
	  0 it effectively calls a routine to deal with whatever interrupts
	  were deferred during the time the code was operating in a critical
	  section.

	  Other architectures are unaffected.

	* fork_exit() has been conditionalized to remove MD assumptions for
	  the new code.  Old code will still use the old MD assumptions
	  in regards to hard interrupt disablement.  In STAGE-2 this will
	  be turned into a subroutine call into MD code rather then hardcoded
	  in MI code.

	  The new code places the burden of entering the critical section
	  in the trampoline code where it belongs.

	* I386: interrupts are now enabled while we are in a critical section.
	  The interrupt vector code has been adjusted to deal with the fact.
	  If it detects that we are in a critical section it currently defers
	  the interrupt by adding the appropriate bit to an interrupt mask.

	* In order to accomplish the deferral, icu_lock is required.  This
	  is i386-specific.  Thus icu_lock can only be obtained by mainline
	  i386 code while interrupts are hard disabled.  This change has been
	  made.

	* Because interrupts may or may not be hard disabled during a
	  context switch, cpu_switch() can no longer simply assume that
	  PSL_I will be in a consistent state.  Therefore, it now saves and
	  restores eflags.

	* FAST INTERRUPT PROVISION.  Fast interrupts are currently deferred.
	  The intention is to eventually allow them to operate either while
	  we are in a critical section or, if we are able to restrict the
	  use of sched_lock, while we are not holding the sched_lock.

	* ICU and APIC vector assembly for I386 cleaned up.  The ICU code
	  has been cleaned up to match the APIC code in regards to format
	  and macro availability.  Additionally, the code has been adjusted
	  to deal with deferred interrupts.

	* Deferred interrupts use a per-cpu boolean int_pending, and
	  masks ipending, spending, and fpending.  Being per-cpu variables
	  it is not currently necessary to lock; bus cycles modifying them.

	  Note that the same mechanism will enable preemption to be
	  incorporated as a true software interrupt without having to
	  further hack up the critical nesting code.

	* Note: the old critical_enter() code in kern/kern_switch.c is
	  currently #ifdef to be compatible with both the old and new
	  methodology.  In STAGE-2 it will be moved entirely to MD code.

Performance issues:

	One of the purposes of this commit is to enhance critical section
	performance, specifically to greatly reduce bus overhead to allow
	the critical section code to be used to protect per-cpu caches.
	These caches, such as Jeff's slab allocator work, can potentially
	operate very quickly making the effective savings of the new
	critical section code's performance very significant.

	The second purpose of this commit is to allow architectures to
	enable certain interrupts while in a critical section.  Specifically,
	the intention is to eventually allow certain FAST interrupts to
	operate rather then defer.

	The third purpose of this commit is to begin to clean up the
	critical_enter()/critical_exit()/cpu_critical_enter()/
	cpu_critical_exit() API which currently has serious cross pollution
	in MI code (in fork_exit() and ast() for example).

	The fourth purpose of this commit is to provide a framework that
	allows kernel-preempting software interrupts to be implemented
	cleanly.  This is currently used for two forward interrupts in I386.
	Other architectures will have the choice of using this infrastructure
	or building the functionality directly into critical_enter()/
	critical_exit().

	Finally, this commit is designed to greatly improve the flexibility
	of various architectures to manage critical section handling,
	software interrupts, preemption, and other highly integrated
	architecture-specific details.
2002-02-26 17:06:21 +00:00
Peter Wemm
6bd95d70db Work-in-progress commit syncing up pmap cleanups that I have been working
on for a while:
- fine grained TLB shootdown for SMP on i386
- ranged TLB shootdowns.. eg: specify a range of pages to shoot down with
  a single IPI, since the IPI is very expensive.  Adjust some callers
  that used to trigger this inside tight loops to do a ranged shootdown
  at the end instead.
- PG_G support for SMP on i386 (options ENABLE_PG_G)
- defer PG_G activation till after we decide what we are going to do with
  PSE and the 4MB pages at the start of the kernel.  This should solve
  some rumored strangeness about stale PG_G entries getting stuck
  underneath the 4MB pages.
- add some instrumentation for the fine TLB shootdown
- convert some asm instruction wrappers from functions to inlines.  gcc
  seems to do a fair bit better with this.
- [temporarily!] pessimize the tlb shootdown IPI handlers.  I will fix
  this again shortly.

This has been working fairly well for me for a while, but I have tweaked
it again prior to commit since my last major testing round.  The only
outstanding problem that I know of is PG_G related, which is why there
is an option for it (not on by default for SMP).  I have seen a world
speedups by a few percent (as much as 4 or 5% in one case) but I have
*not* accurately measured this - I am a bit sceptical of these numbers.
2002-02-25 23:49:51 +00:00
Peter Wemm
963131fe0a Tidy up some warnings 2002-02-25 21:42:23 +00:00
Poul-Henning Kamp
1cbb9c3b03 Convert p->p_runtime and PCPU(switchtime) to bintime format. 2002-02-22 13:32:01 +00:00
Peter Wemm
6a3e90ef2f Some more tidy-up of stray "unsigned" variables instead of p[dt]_entry_t
etc.
2002-02-20 01:05:57 +00:00
Mike Barcroft
d1f7a1b79c Add C++ support. 2002-02-19 02:17:16 +00:00
Mike Barcroft
fd8e4ebc8c o Move NTOHL() and associated macros into <sys/param.h>. These are
deprecated in favor of the POSIX-defined lowercase variants.
o Change all occurrences of NTOHL() and associated marcros in the
  source tree to use the lowercase function variants.
o Add missing license bits to sparc64's <machine/endian.h>.
  Approved by: jake
o Clean up <machine/endian.h> files.
o Remove unused __uint16_swap_uint32() from i386's <machine/endian.h>.
o Remove prototypes for non-existent bswapXX() functions.
o Include <machine/endian.h> in <arpa/inet.h> to define the
  POSIX-required ntohl() family of functions.
o Do similar things to expose the ntohl() family in libstand, <netinet/in.h>,
  and <sys/param.h>.
o Prepend underscores to the ntohl() family to help deal with
  complexities associated with having MD (asm and inline) versions, and
  having to prevent exposure of these functions in other headers that
  happen to make use of endian-specific defines.
o Create weak aliases to the canonical function name to help deal with
  third-party software forgetting to include an appropriate header.
o Remove some now unneeded pollution from <sys/types.h>.
o Add missing <arpa/inet.h> includes in userland.

Tested on:	alpha, i386
Reviewed by:	bde, jake, tmm
2002-02-18 20:35:27 +00:00
Yoshihiro Takahashi
aeda92b5f2 Add bus_space_unmap() and bus_space_free() functions to release
a bus_space_handle allocated by bus_space_subregion().
2002-02-18 13:44:46 +00:00
Yoshihiro Takahashi
2630782c21 Add stubs for bus_space_unmap() and bus_space_free(). They are needed to
release a bus_space_handle allocated by bus_space_subregion().
2002-02-18 13:43:19 +00:00
Daniel Eischen
0270d57aef Use struct __ucontext in prototypes and associated functions instead of
ucontext_t.  Forward declare struct __ucontext in <sys/signal.h> and
remove reliance on <sys/ucontext.h> being included.

While I'm here, also hide osigcontext types from userland; suggested
by bde.

Namespace pollution noticed by: Kevin Day <toasty@shell.dragondata.com>
2002-02-17 17:40:34 +00:00
Yoshihiro Takahashi
37be85a7b0 Correct typo. 2002-02-17 14:16:17 +00:00
Yoshihiro Takahashi
9f67ccb7e5 Move the bus_space_subregion function from the puc driver to the bus_space
sutff.

Reviewed by:	jhay
2002-02-17 09:41:23 +00:00
Yoshihiro Takahashi
9d139b79d4 - Split the routine to initialize a bus_space_handle into the separate
function.
- Only access a bus_space_handle if the resource type is SYS_RES_MEMORY or
  SYS_RES_IOPORT.
- Add the bus_space_subregion supports.
2002-02-17 09:16:45 +00:00
Yoshihiro Takahashi
1b629611b6 Added #include <sys/systm.h> 2002-02-16 12:58:16 +00:00
Garrett Wollman
3b7a4c4b1d Resurrect one of the easiest changes from my big include files roll-up
patch from a year ago: give file flags their own type.  This does not
(yet) change the type used by system calls or library functions.
The underlying type was chosen to match what is returned by stat().
2002-02-15 22:15:39 +00:00
David Malone
34221a4505 Move do_cpuid() from a identcpu.c into cpufunc.h. 2002-02-12 21:06:48 +00:00
Bruce Evans
d2f22d707a Garbage-collect the "LOCORE" version of MPLOCKED. 2002-02-11 03:41:59 +00:00
John Baldwin
289da3dd99 Apparently during the KSE M2 commit bzero() on the i386 was changed so that
it's first parameter was volatile.  Catch i486_bzero() and i586_bzero()'s
prototypes up to this to quiet warnings.
2002-02-08 19:16:47 +00:00
Mark Murray
9a29e3250d Make the style a little bit more consistant by removing parameter
names from some prototypes. (Other prototypes here already have
these removed).
2002-02-03 11:21:22 +00:00
Bruce Evans
92fd4795fa Finish revs.1.23 and 1.24 so that MCOUNT_ENTER really actually compiles
for SMP in the plain profiling case.  It seems to work too.

This error was not detected by LINT because LINT only compiles the
GUPROF profiling case, which is is a superset of the plain profiling
case for !SMP but which is so broken for SMP that the buggy code is
not compiled.
2002-01-31 13:49:55 +00:00
Peter Wemm
58815d1196 Avoid __func__ string concatenation 2002-01-18 04:41:23 +00:00
Bruce Evans
e744f30933 Changed the type of pcb_flags from u_char to u_int and adjusted things.
This removes the only atomic operation on a char type in the entire
kernel.
2002-01-17 17:49:23 +00:00
Peter Wemm
77c99f362a Ensure that we set all the %cr0 bits to a known state for the AP's before
they make it through to userland.  This should fix the p5-smp problem
without affecting the other cpus (eg: cyrix, see initcpu.c and the special
cache handling for these cpu types).
2002-01-16 00:44:29 +00:00
Daniel Eischen
2e615b482d Use a spare slot in the machine context for a flags word to indicate
whether the machine context is valid and whether the FPU state is
valid (saved).

Mark the machine context valid before copying it out when sending a
signal.

Approved by:	-arch
2002-01-10 02:32:30 +00:00
Mike Smith
0f04c2b207 Gut this header; since physio_proc_init is never called, the code never does
anything more than multiply declare some unused variables.
2002-01-08 10:26:44 +00:00
Peter Wemm
ead8168ac0 Convert a bunch of 1 << PCPU_GET(cpuid) to PCPU_GET(cpumask). 2002-01-05 09:41:37 +00:00
Gary Jennejohn
dc16760bf7 Add support for the AVM Fritz!Card PCI version 2 controller.
MFC after:	4 weeks
2001-12-22 09:25:55 +00:00
John Baldwin
98f9879242 Introduce a standard name for the lock protecting an interrupt controller
and it's associated state variables: icu_lock with the name "icu".  This
renames the imen_mtx for x86 SMP, but also uses the lock to protect
access to the 8259 PIC on x86 UP.  This also adds an appropriate lock to
the various Alpha chipsets which fixes problems with Alpha SMP machines
dropping interrupts with an SMP kernel.
2001-12-20 23:48:31 +00:00
John Baldwin
3f9a462fb9 Various assembly fixes mostly in the form of using the "+" modifier for
output operands to mark them as both input and output rather than listing
operands twice.

Reviewed by:	bde
2001-12-18 08:54:39 +00:00
John Baldwin
e4e991e117 Allow the ATOMIC_ASM() macro to pass in the constraints on the V parameter
since the char versions need to use either ax, bx, cx, or dx.

Submitted by:	Peter Jeremy (mostly)
Recommended by:	bde
2001-12-18 08:51:34 +00:00
David E. O'Brien
99364715f7 With GCC 3, we *must* use the GCC stdarg.h. We can no longer just make
_BSD_VA_LIST_ match what we think the compiler is doing.
2001-12-18 03:28:08 +00:00
John Baldwin
7e1f6dfe9d Modify the critical section API as follows:
- The MD functions critical_enter/exit are renamed to start with a cpu_
  prefix.
- MI wrapper functions critical_enter/exit maintain a per-thread nesting
  count and a per-thread critical section saved state set when entering
  a critical section while at nesting level 0 and restored when exiting
  to nesting level 0.  This moves the saved state out of spin mutexes so
  that interlocking spin mutexes works properly.
- Most low-level MD code that used critical_enter/exit now use
  cpu_critical_enter/exit.  MI code such as device drivers and spin
  mutexes use the MI wrappers.  Note that since the MI wrappers store
  the state in the current thread, they do not have any return values or
  arguments.
- mtx_intr_enable() is replaced with a constant CRITICAL_FORK which is
  assigned to curthread->td_savecrit during fork_exit().

Tested on:	i386, alpha
2001-12-18 00:27:18 +00:00
John Baldwin
1ecf0d56c8 Small cleanups to the SMP code:
- Axe inlvtlb_ok as it was completely redundant with smp_active.
- Remove references to non-existent variable and non-existent file
  in i386/include/smp.h.
- Don't perform initializations local to each CPU while holding the
  ap boot lock on i386 while an AP bootstraps itself.
- Reorganize the AP startup code some to unify the latter half of the
  functions to bring an AP up.  Eventually this might be broken out into
  a MI function in subr_smp.c.
2001-12-17 23:14:35 +00:00
Yoshihiro Takahashi
9cc62fb3d8 Fixed to draw mouse cursor. The syscons driver for PC98 uses different
attributes from i386.

Submitted by:	chi@bd.mbn.or.jp (Chiharu Shibata)
MFC after:	3 days
2001-12-14 15:27:15 +00:00
John Baldwin
341260fb20 Axe an unneeded PCPU_SET(spinlocks, NULL) that I missed earlier. 2001-12-12 08:07:41 +00:00
John Baldwin
0bbc882680 Overhaul the per-CPU support a bit:
- The MI portions of struct globaldata have been consolidated into a MI
  struct pcpu.  The MD per-CPU data are specified via a macro defined in
  machine/pcpu.h.  A macro was chosen over a struct mdpcpu so that the
  interface would be cleaner (PCPU_GET(my_md_field) vs.
  PCPU_GET(md.md_my_md_field)).
- All references to globaldata are changed to pcpu instead.  In a UP kernel,
  this data was stored as global variables which is where the original name
  came from.  In an SMP world this data is per-CPU and ideally private to each
  CPU outside of the context of debuggers.  This also included combining
  machine/globaldata.h and machine/globals.h into machine/pcpu.h.
- The pointer to the thread using the FPU on i386 was renamed from
  npxthread to fpcurthread to be identical with other architectures.
- Make the show pcpu ddb command MI with a MD callout to display MD
  fields.
- The globaldata_register() function was renamed to pcpu_init() and now
  init's MI fields of a struct pcpu in addition to registering it with
  the internal array and list.
- A pcpu_destroy() function was added to remove a struct pcpu from the
  internal array and list.

Tested on:	alpha, i386
Reviewed by:	peter, jake
2001-12-11 23:33:44 +00:00
David E. O'Brien
6e551fb628 Update to C99, s/__FUNCTION__/__func__/,
also don't use ANSI string concatenation.
2001-12-10 08:09:49 +00:00
David E. O'Brien
acdff873d8 style(9) 2001-12-09 19:12:07 +00:00
John Baldwin
9b37da1390 Add a missing open paren to a macro that's been broken (and apparently
unused) since rev 1.1 so it is at least correct.

Submitted by:	Maxime Henrion <mux@qualys.com>
2001-12-04 00:35:28 +00:00
Mike Barcroft
de2656d0ed o Stop abusing MD headers with non-MD types.
o Hide nonstandard functions and types in <netinet/in.h> when
  _POSIX_SOURCE is defined.
o Add some missing types (required by POSIX.1-200x) to <netinet/in.h>.
o Restore vendor ID from Rev 1.1 in <netinet/in.h> and make use of new
  __FBSDID() macro.
o Fix some miscellaneous issues in <arpa/inet.h>.
o Correct final argument for the inet_ntop() function (POSIX.1-200x).
o Get rid of the namespace pollution from <sys/types.h> in
  <arpa/inet.h>.

Reviewed by:		fenner
Partially submitted by:	bde
2001-12-01 03:43:01 +00:00
John Baldwin
c6010b66a3 Whitespace fixes so thre 386 versoion of __uint8_swap_uint32 is easier to
read.
2001-11-28 17:10:57 +00:00
Peter Wemm
6729cb8800 Start bringing i386/pmap.c into line with cleanups that were done to
alpha pmap.  In particular -
- pd_entry_t and pt_entry_t are now u_int32_t instead of a pointer.
  This is to enable cleaner PAE and x86-64 support down the track sor
  that we can change the pd_entry_t/pt_entry_t types to 64 bit entities.
- Terminate "unsigned *ptep, pte" with extreme prejudice and use the
  correct pt_entry_t/pd_entry_t types.
- Various other cosmetic changes to match cleanups elsewhere.
- This eliminates a boatload of casts.
- use VM_MAXUSER_ADDRESS in place of UPT_MIN_ADDRESS in a couple of places
  where we're testing user address space limits.  Assuming the page tables
  start directly after the end of user space is not a safe assumption.
There is still more to go.
2001-11-17 01:38:32 +00:00
Maxim Sobolev
3f1a8e9371 Allow bit 21 of EFLAGS register (PSL_ID) be changed in the use-mode without
ill effects. This should fix problems threaded programs are having with
auto-detecting CPU type.

Reported by:	Joe Clarke <marcus@marcuscom.com>
Tested by:	Joe Clarke <marcus@marcuscom.com>
Reviewed by:	jhb
MFC after:	1 week
2001-11-15 23:01:29 +00:00
John Baldwin
d900909439 Use newer constraints for atomic_cmpset().
Requested by:	bde
2001-11-12 18:53:45 +00:00
John Baldwin
20a2016a81 Use newer constraints for inline assembly for an operand that is both an
input and an output by using the '+' modifier rather than listing the
operand in both the input and output sections.

Reviwed by:	bde
2001-11-12 16:57:33 +00:00
Mike Barcroft
0ac2d551f2 o Add new header <sys/stdint.h>.
o Make <stdint.h> a symbolic link to <sys/stdint.h>.
o Move most of <sys/inttypes.h> into <sys/stdint.h>, as per C99.
o Remove <sys/inttypes.h>.
o Adjust includes in sys/types.h and boot/efi/include/ia64/efibind.h
  to reflect new location of integer types in <sys/stdint.h>.
o Remove previously symbolicly linked <inttypes.h>, instead create a
  new file.
o Add MD headers <machine/_inttypes.h> from NetBSD.
o Include <sys/stdint.h> in <inttypes.h>, as required by C99; and
  include <machine/_inttypes.h> in <inttypes.h>, to fill in the
  remaining requirements for <inttypes.h>.
o Add additional integer types in <machine/ansi.h> and
  <machine/limits.h> which are included via <sys/stdint.h>.

Partially obtain from:	NetBSD
Tested on:		alpha, i386
Discussed on:		freebsd-standards@bostonradio.org
Reviewed by:		bde, fenner, obrien, wollman
2001-11-02 18:05:43 +00:00
Matt Jacob
ff6164046e Remove previous revision. smp_started back in subr_smp where it belongs. 2001-10-31 23:54:27 +00:00
Matt Jacob
6b094090d4 Make the actual volatile int smp_started live *somewhere*. This is
a temporary fix so that we can compile kernels. I waited 30 minutes
for a response from the person who would likely know, but any longer
is too long to wait with breakage at ToT.
2001-10-31 20:43:48 +00:00
Brian Feldman
4a44bd4b4a Add kmupetext(), a function that expands the range of memory covered
by the profiler on a running system.  This is not done sparsely, as
memory is cheaper than processor speed and each gprof mcount() and
mexitcount() operation is already very expensive.

Obtained from:	NAI Labs CBOSS project
Funded by:	DARPA
2001-10-30 15:04:57 +00:00
John Baldwin
24db04598b Split the per-process Local Descriptor Table out of the PCB and into
struct mdproc.

Submitted by:	Andrew R. Reiter <arr@watson.org>
Silence on:	-current
2001-10-25 00:53:43 +00:00
Mike Barcroft
3a72286480 Remove funky right justification.
Pointed out by:	bde
2001-10-23 00:42:15 +00:00
Dag-Erling Smørgrav
1f04261973 [partially forced commit due to pilot error in earlier commit attempt]
{set,fill}_{,fp,db}regs() fixup:

 - Add dummy {set,fill}_dbregs() on architectures that don't have them.

 - KSEfy the powerpc versions (struct proc -> struct thread).

 - Some architectures had the prototypes in md_var.h, some in reg.h, and
   some in both; for consistency, move them to reg.h on all platforms.

These functions aren't really MD (the implementation is MD, but the interface
is MI), so they should move to an MI header, but I haven't figured out which
one yet.

Run-tested on i386, build-tested on Alpha, untested on other platforms.
2001-10-21 22:16:48 +00:00
Hellmuth Michaelis
676ccc0cd0 Add a driver for the Compaq Microcom 610 ISDN (Compaq series PSB2222I) ISA PnP
card.

Submitted by:   Steve Looman
Reviewed by:    hm
MFC after:      1 month
2001-10-21 09:20:52 +00:00
Ruslan Ermilov
c3917acb86 Fix the typedef of va_list. 2001-10-19 20:07:46 +00:00
David E. O'Brien
9f9bd82e15 Try two on the preprocessing logic.
Reviewed by:	ru
2001-10-19 20:01:01 +00:00
David E. O'Brien
4b16cf4f8a Blah, fix braino where ru had to remind me of proper preprocessor syntax.
Bad fingers, no cookie.
2001-10-19 19:17:11 +00:00
David E. O'Brien
e3ddd70789 My attempts at minimizing the number of #def's got me in trouble. 2001-10-18 16:07:21 +00:00
Hellmuth Michaelis
8f3a90354e Add experimental support for sending keypad facility messages.
MFC after: 2 months
2001-10-18 11:58:49 +00:00
David E. O'Brien
4a3391b5a1 Add support for "__gnuc_va_list". Some overly "smart" libraries assume
the existence of the __gnuc_va_list type[*] because our compiler is GCC.

[*] __gnuc_va_list is defined in the GCC ginclude/stdarg.h replacement
headerwhich we don't use.
2001-10-18 00:27:39 +00:00
David E. O'Brien
1f3efe7fe4 Minor comment tweaking. 2001-10-17 23:59:29 +00:00
John Baldwin
61d80e90a9 Add missing includes of sys/ktr.h. 2001-10-11 17:53:43 +00:00
Paul Saab
cbc89bfbfe Make MAXTSIZ, DFLDSIZ, MAXDSIZ, DFLSSIZ, MAXSSIZ, SGROWSIZ loader
tunable.

Reviewed by:	peter
MFC after:	2 weeks
2001-10-10 23:06:54 +00:00
John Baldwin
2a89a48fbd Allow atomic ops to be somewhat safely used in userland. We always use
lock prefixes in the userland case so that the binaries will work on both
SMP and UP systems.
2001-10-08 20:58:24 +00:00
Yoshihiro Takahashi
f2eeb19063 Rewrite the pc98 bus_space stuff.
The type of bus_space_tag_t is now a pointer to bus_space_tag structure,
and the bus_space_tag structure saves pointers to functions for direct
access and relocate access.

Added bsh_bam member to the bus_space_handle structure, it saves access
method either direct access or relocate access which is called by
bus_space_* functions.

Added the mecia device support. If the bs_da and bs_ra in bus tag are set
NEPC_io_space_tag and NEPC_mem_space_tag respectively, new bus_space stuff
changes the register of mecia automatically for 16bit access.

Obtained from:	NetBSD/pc98
2001-10-07 10:04:18 +00:00
Yoshihiro Takahashi
31b2da2bea - Moved the bus_dma declarations from bus_{at386,pc98}.h into bus_dma.h.
(bus_dma.h is repo-copied from bus_at386.h)
- Added '#include <machine/bus_dma.h>' into bus.h for backward compatibility.
2001-10-06 16:27:21 +00:00
Bruce Evans
05e47d1f21 Fixed a missing proc -> thread substitution.
Broke future detection of this bug in userland by not declaring kernel
prototypes in userland.
2001-10-03 17:23:26 +00:00
Peter Wemm
f83fbaf22d Introduce a new option, KVA_SPACE, which can be used to reconfigure
the size of the kernel virtual address space relatively painlessly.
Userland will adapt via the exported kernbase symbol.  Increasing
this causes the user part of address space to reduce.
2001-09-21 06:23:03 +00:00
Peter Wemm
eb25edbda3 Cleanup and split of nfs client and server code.
This builds on the top of several repo-copies.
2001-09-18 23:32:09 +00:00
John Baldwin
fdca1cb1ef Whitespace fixes. 2001-09-18 21:52:15 +00:00
John Baldwin
fd54558a83 - If we ever do the per-cpu KTR stuff, the index won't be volatile as it
will be private to each CPU.
- Re-style(9) the globaldata structures.  There really needs to be a MI
  struct pcpu that has a MD struct mdpcpu member at some point.
2001-09-18 21:46:26 +00:00
Doug Rabson
3a0b4f259c Fill out some gaps in ia64 DDB support. This involves generalising DDB's
breakpoint handling slightly to cope with the fact that ia64 instructions
are not located on byte boundaries.
2001-09-15 11:06:07 +00:00
Julian Elischer
b40ce4165d KSE Milestone 2
Note ALL MODULES MUST BE RECOMPILED
make the kernel aware that there are smaller units of scheduling than the
process. (but only allow one thread per process at this time).
This is functionally equivalent to teh previousl -current except
that there is a thread associated with each process.

Sorry john! (your next MFC will be a doosie!)

Reviewed by: peter@freebsd.org, dillon@freebsd.org

X-MFC after:    ha ha ha ha
2001-09-12 08:38:13 +00:00
Gary Jennejohn
cc3ee09cd3 Increase AUTHNAME to 42 bytes for users of T-Online, which requires 41
bytes.

MFC after:	2 weeks
2001-09-12 08:27:54 +00:00
Kris Kennaway
bf61e26696 Fix some signed/unsigned integer confusion, and add bounds checking of
arguments to some functions.

Obtained from:	NetBSD
Reviewed by:	peter
MFC after:	2 weeks
2001-09-10 11:28:07 +00:00
David E. O'Brien
1792335469 style(9) the structure definitions. 2001-09-05 01:36:46 +00:00
Mitsuru IWASAKI
db2077f8e1 Reenable RTC interrupts after wakeup. Some laptops have a problem
with system statistics monitoring tools (such as systat, vmstat...)
because of stopping RTC interrupts generation.
Restore all the timers (RTC and i8254) atomically.

Reviewed by:	bde
MFC after:	1 week
2001-09-04 16:02:06 +00:00
Kazutaka YOKOTA
bdaeb9cc90 Fix the argument specifier for the PnP BIOS function 2
(PNP_SET_DEVNODE). The second argument is not a segment:offset
pointer, but a 16 bit short.

MFC after:	4 weeks
2001-09-03 03:43:39 +00:00
Mike Barcroft
03516cfeb0 o Remove some GCCisms in src/powerpc/include/endian.h.
o Unify <machine/endian.h>'s across all architectures.
o Make bswapXX() functions use a different spelling of u_int16_t and
  friends to reduce namespace pollution.  The bswapXX() functions
  don't actually exist, but we'll probably import these at some
  point.  Atleast one driver (if_de) depends on bswapXX() for big
  endian cases.
o Deprecate byteorder(3) prototypes from <sys/types.h>, these are
  now prototyped indirectly in <arpa/inet.h>.
o Deprecate in_addr_t and in_port_t typedefs in <sys/types.h>, these
  are now typedef'd in <arpa/inet.h>.
o Change byteorder(3) prototypes to use standards compliant uint32_t
  (spelled __uint32_t to reduce namespace pollution).
o Document new preferred headers and standards compliance.

Discussed with:	bde
PR:		29946
Reviewed by:	bmilekic
2001-08-30 00:04:19 +00:00
Peter Wemm
547a9e66fd vm_page_zero_idle() is no longer MD. 2001-08-25 04:54:25 +00:00
Peter Wemm
268bdb43f9 Optionize UPAGES for the i386. As part of this I split some of the low
level implementation stuff out of machine/globaldata.h to avoid exposing
UPAGES to lots more places.  The end result is that we can double
the kernel stack size with 'options UPAGES=4' etc.

This is mainly being done for the benefit of a MFC to RELENG_4 at some
point.  -current doesn't really need this so much since each interrupt
runs on its own kstack.
2001-08-25 02:20:02 +00:00
Warner Losh
0b9427de88 The general conesnsus on irc was that pci bios for config registers
and such was just a bad idea and one that users should be forced to
enable if they want it.  This patch introduces a hw.pci.enable_pcibios
tunable for those people.  This does not impact the pcibios interrupt
routing at all.

Approved by: peter, msmith
2001-08-21 07:53:37 +00:00
Peter Wemm
573be82757 Detect a certain type of PCIBIOS brain damage. For some reason,
some bios vendors took it apon themselves to "censor" the
host->pci bridges from PCIBIOS callers, even when the caller
explicitly asks for them.  This includes certain Compaq machines
(eg: DL360) and some laptops.

If we detect this, shut down pcibios and revert to using IO
port bashing.

Under -current, apcica does a better job anyway.
2001-08-21 03:10:55 +00:00
Matthew Dillon
2f9e4e8025 Limit the amount of KVM reserved for the buffer cache and for swap-meta
information.  The default limits only effect machines with > 1GB of ram
and can be overriden with two new kernel conf variables VM_SWZONE_SIZE_MAX
and VM_BCACHE_SIZE_MAX, or with loader variables kern.maxswzone and
kern.maxbcache.  This has the effect of leaving more KVM available for
sizing NMBCLUSTERS and 'maxusers' and should avoid tripups where a sysad
adds memory to a machine and then sees the kernel panic on boot due to
running out of KVM.

Also change the default swap-meta auto-sizing calculation to allocate half
of what it was previously allocating.  The prior defaults were way too high.
Note that we cannot afford to run out of swap-meta structures so we still
stay somewhat conservative here.
2001-08-20 00:41:12 +00:00
David E. O'Brien
589278dbae style(9) and make consistent across platforms 2001-08-16 09:29:35 +00:00
Andrey A. Chernov
2a54e09dff OFF_T -> OFF (more standard style) 2001-08-15 19:50:59 +00:00
Andrey A. Chernov
527b997c3d Add OFF_T_MAX/OFF_T_MIN 2001-08-15 19:12:46 +00:00
John Baldwin
688ebe120c - Close races with signals and other AST's being triggered while we are in
the process of exiting the kernel.  The ast() function now loops as long
  as the PS_ASTPENDING or PS_NEEDRESCHED flags are set.  It returns with
  preemption disabled so that any further AST's that arrive via an
  interrupt will be delayed until the low-level MD code returns to user
  mode.
- Use u_int's to store the tick counts for profiling purposes so that we
  do not need sched_lock just to read p_sticks.  This also closes a
  problem where the call to addupc_task() could screw up the arithmetic
  due to non-atomic reads of p_sticks.
- Axe need_proftick(), aston(), astoff(), astpending(), need_resched(),
  clear_resched(), and resched_wanted() in favor of direct bit operations
  on p_sflag.
- Fix up locking with sched_lock some.  In addupc_intr(), use sched_lock
  to ensure pr_addr and pr_ticks are updated atomically with setting
  PS_OWEUPC.  In ast() we clear pr_ticks atomically with clearing
  PS_OWEUPC.  We also do not grab the lock just to test a flag.
- Simplify the handling of Giant in ast() slightly.

Reviewed by:	bde (mostly)
2001-08-10 22:53:32 +00:00
Peter Wemm
2aca0c28d3 Zap 'ptrace(PT_READ_U, ...)' and 'ptrace(PT_WRITE_U, ...)' since they
are a really nasty interface that should have been killed long ago
when 'ptrace(PT_[SG]ETREGS' etc came along.  The entity that they
operate on (struct user) will not be around much longer since it
is part-per-process and part-per-thread in a post-KSE world.

gdb does not actually use this except for the obscure 'info udot'
command which does a hexdump of as much of the child's 'struct user'
as it can get.  It carries its own #defines so it doesn't break
compiles.
2001-08-08 05:25:15 +00:00
Jake Burkholder
7e5102989e Use a machine dependent type, Elf_Hashelt, for the elements of the elf
dynamic symbol table buckets and chains.  The sparc64 toolchain uses 32
bit .hash entries, unlike other 64 bits architectures (alpha), which use
64 bit entries.

Discussed with: dfr, jdp
2001-07-31 03:46:39 +00:00
Bosko Milekic
49f854f926 - Do not handle the per-CPU containers in mbuf code as though the cpuids
were indices in a dense array. The cpuids are a sparse set and treat
  them as such, setting up containers only for CPUs activated during
  mb_init().

- Fix netstat(1) and systat(1) to treat the per-CPU stats area as a sparse
  map, in accordance with the above.

This allows us to properly boot with certain CPUs disactivated. However, if
we later decide to re-activate said CPUs, we will barf until we decide to
implement CPU spinon/spinoff callback hooks to allow for said CPUs' per-CPU
containers to get configured on their activation.

Reported by: mjacob
Partially (sys/ diffs) Submitted by: mjacob
2001-07-26 18:47:46 +00:00
Hellmuth Michaelis
4d02f92dd2 update step. 2001-07-21 11:31:27 +00:00
John Baldwin
ce11a18f0e Fix MCOUNT_ENTER() so it actually compiles in the profiling case.
Pointy hat to:	me
Submitted by:	Danny J. Zerkel <dzerkel@columbus.rr.com>
2001-07-14 21:40:53 +00:00
Peter Wemm
28f74b2003 The #define for pcb_savefpu seems to do more harm than good. 2001-07-12 12:48:08 +00:00
Peter Wemm
9d146ac5d1 Activate SSE/SIMD. This is the extra context switching support that
we are required to do if we let user processes use the extra 128 bit
registers etc.

This is the base part of the diff I got from:
  http://www.issei.org/issei/FreeBSD/sse.html
I believe this is by:  Mr. SUZUKI Issei <issei@issei.org>
SMP support apparently by: Takekazu KATO <kato@chino.it.okayama-u.ac.jp>
Test code by: NAKAMURA Kazushi <kaz@kobe1995.net>, see
  http://kobe1995.net/~kaz/FreeBSD/SSE.en.html

I have fixed a couple of style(9) deviations.  I have some followup
commits to fix a couple of non-style things.
2001-07-12 06:32:51 +00:00
John Baldwin
6be523bca7 Add a new MI pointer to the process' trapframe p_frame instead of using
various differently named pointers buried under p_md.

Reviewed by:	jake (in principle)
2001-06-29 11:10:41 +00:00
John Baldwin
25142c5ea1 Get kernel profiling on SMP systems closer to working by replacing the
mcount spin mutex with a very simple non-recursive spinlock implemented
using atomic operations.
2001-06-28 04:03:29 +00:00
Brian S. Dean
6eda157eaa Provide access to the IA32 hardware debug registers from the ddb
kernel debugger.  Proper use of these registers allows setting
hardware watchpoints for use in kernel debugging.

MFC after: 2 weeks
2001-06-28 02:08:13 +00:00
Yoshihiro Takahashi
dced978191 Merged from sys/i386/include/bus_at386.h revision 1.14. 2001-06-26 11:36:45 +00:00
John Baldwin
3128cdd847 Include sys/pcpu.h to get the prototype for globaldata_register() to quiet
a warning.
2001-06-18 19:06:14 +00:00
Alexander Langer
90f76f2df0 Fix "alignemnt" typo. 2001-06-16 15:28:28 +00:00
David E. O'Brien
f9b58b41a3 Fix style of defines. 2001-06-09 05:21:17 +00:00
Joerg Wunsch
e774b25111 Nuke the various poorly maintained copies of ioctl_fd.h. The file is
not machine-dependant, thus it has been moved out (repo-copied) into
<sys/fdcio.h>.
2001-06-06 06:15:03 +00:00
Poul-Henning Kamp
0d31cbfab7 Properly wrap mtx_intr_enable() macro in "do $bla while (0)" 2001-06-02 08:17:42 +00:00
Thomas Moestl
27c775d7bf This file is not needed any more, the definitions and declarations it
contained have been moved to i386/isa/icu.h and sys/interrupt.h.
2001-06-01 13:33:30 +00:00
Hellmuth Michaelis
6b244dc54b Submitted by: Juha-Matti Liukkonen (Cubical Solutions Ltd) (jml@cubical.fi)
Add a CAPI (hardware independent) driver i4bcapi(4) and hardware driver
iavc (4) to support active CAPI-based BRI and PRI cards (currently AVM
B1 and T1 cards) to isdn4bsd.
2001-05-25 08:43:30 +00:00
Bruce Evans
1c1771cb5b Convert npx interrupts into traps instead of vice versa. This is much
simpler for npx exceptions that start as traps (no assembly required...)
and works better for npx exceptions that start as interrupts (there is
no longer a problem for nested interrupts).

Submitted by:	original (pre-SMPng) version by luoqi
2001-05-22 21:20:49 +00:00
David E. O'Brien
02c629d468 Make _BSD_TIME_T_ (time_t) an int' rather than long'. This will help
flag errors where programmers assume time_t is a long, which it is not on
64-bit platforms.

Submitted by:	bde
2001-05-18 01:43:25 +00:00
David E. O'Brien
ef76752043 Style changes -- revert ordering to mostly two revs ago.
Embellish some comments, fix tab'ing.

Requested by:	bde
2001-05-18 01:40:40 +00:00
David E. O'Brien
0dfc89c188 Consistently define the rune types.
Follow NetBSD's lead and add a _BSD_MBSTATE_T_ type.
2001-05-16 22:32:44 +00:00
David E. O'Brien
1123bf8862 Move the int typedefs to the top so they can be used in defining other types.
Ensure every platform has __offsetof.
Make multiple inclusion detection consistent with other
  <platform>/include/*.h files.
2001-05-16 22:21:43 +00:00
John Baldwin
dec54ac5b5 "Sir, the deorbit burn completed succesfully."
RIP {sys/machine}/ipl.h.
2001-05-15 23:30:37 +00:00
John Baldwin
8bd57f8fc2 Remove unneeded includes of sys/ipl.h and machine/ipl.h. 2001-05-15 23:22:29 +00:00
Joerg Wunsch
2995d1100c Implement a few more floppy ioctl commands and IO options, namely:
. FD_CLRERR clears the error counter, thus re-enables kernel error
  printf()s,

. FD_GSTAT obtains the last FDC operation state, if any,

. FDOPT_NOERRLOG (temporarily) turns off kernel printf() floppy
  error logging,

. FDOPT_NOERROR makes the kernel ignore an FDC error, thus can
  enable the transfer of an erroneous sector to the user application

All options are being cleared on (last) close.

Prime consumer of the last features will be fdread(1), to be committed
shortly.

(FD_CLRERR should be wired into fdcontrol(8), but then fdcontrol(8)
needs a major rewrite anyway.)
2001-05-14 20:20:11 +00:00
John Baldwin
df4d012b9a - Use sched_lock and critical regions to ensure that LDT updates are thread
safe from preemption and concurrent access to the LDT.
- Move the prototype for i386_extend_pcb() to <machine/pcb_ext.h>.

Reviewed by:	silence on -hackers
2001-05-10 17:03:03 +00:00
Mark Murray
fb919e4d5a Undo part of the tangle of having sys/lock.h and sys/mutex.h included in
other "system" header files.

Also help the deprecation of lockmgr.h by making it a sub-include of
sys/lock.h and removing sys/lockmgr.h form kernel .c files.

Sort sys/*.h includes where possible in affected files.

OK'ed by:	bde (with reservations)
2001-05-01 08:13:21 +00:00
John Baldwin
6caa8a1501 Overhaul of the SMP code. Several portions of the SMP kernel support have
been made machine independent and various other adjustments have been made
to support Alpha SMP.

- It splits the per-process portions of hardclock() and statclock() off
  into hardclock_process() and statclock_process() respectively.  hardclock()
  and statclock() call the *_process() functions for the current process so
  that UP systems will run as before.  For SMP systems, it is simply necessary
  to ensure that all other processors execute the *_process() functions when the
  main clock functions are triggered on one CPU by an interrupt.  For the alpha
  4100, clock interrupts are delievered in a staggered broadcast fashion, so
  we simply call hardclock/statclock on the boot CPU and call the *_process()
  functions on the secondaries.  For x86, we call statclock and hardclock as
  usual and then call forward_hardclock/statclock in the MD code to send an IPI
  to cause the AP's to execute forwared_hardclock/statclock which then call the
  *_process() functions.
- forward_signal() and forward_roundrobin() have been reworked to be MI and to
  involve less hackery.  Now the cpu doing the forward sets any flags, etc. and
  sends a very simple IPI_AST to the other cpu(s).  AST IPIs now just basically
  return so that they can execute ast() and don't bother with setting the
  astpending or needresched flags themselves.  This also removes the loop in
  forward_signal() as sched_lock closes the race condition that the loop worked
  around.
- need_resched(), resched_wanted() and clear_resched() have been changed to take
  a process to act on rather than assuming curproc so that they can be used to
  implement forward_roundrobin() as described above.
- Various other SMP variables have been moved to a MI subr_smp.c and a new
  header sys/smp.h declares MI SMP variables and API's.   The IPI API's from
  machine/ipl.h have moved to machine/smp.h which is included by sys/smp.h.
- The globaldata_register() and globaldata_find() functions as well as the
  SLIST of globaldata structures has become MI and moved into subr_smp.c.
  Also, the globaldata list is only available if SMP support is compiled in.

Reviewed by:	jake, peter
Looked over by:	eivind
2001-04-27 19:28:25 +00:00
John Baldwin
242d02a13f Make the ap_boot_mtx mutex static. 2001-04-20 01:09:05 +00:00
Warner Losh
a5e25da40d Back out 1.103. It wasn't approved by the owner of the file and
introduced style bugs.

Submited by: bde
2001-04-18 20:57:43 +00:00
John Baldwin
abd9053ee4 Blow away the panic mutex in favor of using a single atomic_cmpset() on a
panic_cpu shared variable.  I used a simple atomic operation here instead
of a spin lock as it seemed to be excessive overhead.  Also, this can avoid
recursive panics if, for example, witness is broken.
2001-04-17 04:18:08 +00:00
Mark Murray
b4edbce08c Back out wrapping the asm ... ; bits in #ifndef lint macros. There
are some good reasons for not doing this, even if the linting of
the code breaks.

1) If lint were ever to understand the stuff inside the macros,
   that would break the checks.

2) There are ways to use __GNUC__ to exclude overly specific
   code.

3) (Not yet practical) Lint(1) needs to properlyu understand
   all of te code we actually run.

Complained about by:	bde
Education by:		jake, jhb, eivind
2001-04-14 20:42:04 +00:00
Mark Murray
c13d191de3 Make this more lint-friendly. This file seems to be invoked in just
about any .c file that includes a .h, and lint produces copious
whining because of the asm ...; stuff.
2001-04-13 09:46:54 +00:00
John Baldwin
2fea957dc5 Rename the IPI API from smp_ipi_* to ipi_* since the smp_ prefix is just
"redundant noise" and to match the IPI constant namespace (IPI_*).

Requested by:	bde
2001-04-11 17:06:02 +00:00
John Baldwin
5f76d89870 Remove constants defining the bitmasks of the old giant kernel lock. 2001-04-10 22:22:01 +00:00
John Baldwin
8f3b4b873c Remove the old APIC I/O higher level IPI API in favor of the newer MI
API for IPI's that isn't tied to the Intel APIC.  MD code can still use
the apic_ipi() function or dink with the apic directly if needed to send
MD IPI's.
2001-04-10 22:18:21 +00:00
John Baldwin
ca7ef17c08 Remove the BETTER_CLOCK #ifdef's. The code is on by default and is here
to stay for the foreseeable future.

OK'd by:	peter (the idea)
2001-04-10 21:34:13 +00:00
John Baldwin
6a0fa9a023 Add an MI API for sending IPI's. I used the same API present on the alpha
because:
 - it used a better namespace (smp_ipi_* rather than *_ipi),
 - it used better constant names for the IPI's (IPI_* rather than
   X*_OFFSET), and
 - this API also somewhat exists for both alpha and ia64 already.
2001-04-10 21:04:32 +00:00
John Baldwin
ae60f36f19 Axe the per-cpu variable witness_spin_check as it was replaced by the
per-cpu spinlocks list.
2001-04-06 07:20:27 +00:00
Warner Losh
884c6f61f4 De __P() while I'm here. Done as a separate commit since it is just
stylistic.

# Yes, this break K&R, but this file already used so many gcc extensions
# keeping K&R support seemed too anachronistic for me.

Didn't fix the bug where functions that can only be used in the kernel
are exported to userland.
2001-04-03 18:50:55 +00:00
Warner Losh
29d5de8ad0 Make this file C++ safe. It defines many useful functions (inb, outb)
that people use from userland in C++ programs.  I've had this in my
tree for ages and just got bit by it not being in the real tree again.

This is a MFC candidate.
2001-04-03 18:19:49 +00:00
John Baldwin
192846463a Rework the witness code to work with sx locks as well as mutexes.
- Introduce lock classes and lock objects.  Each lock class specifies a
  name and set of flags (or properties) shared by all locks of a given
  type.  Currently there are three lock classes: spin mutexes, sleep
  mutexes, and sx locks.  A lock object specifies properties of an
  additional lock along with a lock name and all of the extra stuff needed
  to make witness work with a given lock.  This abstract lock stuff is
  defined in sys/lock.h.  The lockmgr constants, types, and prototypes have
  been moved to sys/lockmgr.h.  For temporary backwards compatability,
  sys/lock.h includes sys/lockmgr.h.
- Replace proc->p_spinlocks with a per-CPU list, PCPU(spinlocks), of spin
  locks held.  By making this per-cpu, we do not have to jump through
  magic hoops to deal with sched_lock changing ownership during context
  switches.
- Replace proc->p_heldmtx, formerly a list of held sleep mutexes, with
  proc->p_sleeplocks, which is a list of held sleep locks including sleep
  mutexes and sx locks.
- Add helper macros for logging lock events via the KTR_LOCK KTR logging
  level so that the log messages are consistent.
- Add some new flags that can be passed to mtx_init():
  - MTX_NOWITNESS - specifies that this lock should be ignored by witness.
    This is used for the mutex that blocks a sx lock for example.
  - MTX_QUIET - this is not new, but you can pass this to mtx_init() now
    and no events will be logged for this lock, so that one doesn't have
    to change all the individual mtx_lock/unlock() operations.
- All lock objects maintain an initialized flag.  Use this flag to export
  a mtx_initialized() macro that can be safely called from drivers.  Also,
  we on longer walk the all_mtx list if MUTEX_DEBUG is defined as witness
  performs the corresponding checks using the initialized flag.
- The lock order reversal messages have been improved to output slightly
  more accurate file and line numbers.
2001-03-28 09:03:24 +00:00
John Baldwin
6283b7d01b - Switch from using save/disable/restore_intr to using critical_enter/exit
and change the u_int mtx_saveintr member of struct mtx to a critical_t
  mtx_savecrit.
- On the alpha we no longer need a custom _get_spin_lock() macro to avoid
  an extra PAL call, so remove it.
- Partially fix using mutexes with WITNESS in modules.  Change all the
  _mtx_{un,}lock_{spin,}_flags() macros to accept explicit file and line
  parameters and rename them to use a prefix of two underscores.  Inside
  of kern_mutex.c, generate wrapper functions for
  _mtx_{un,}lock_{spin,}_flags() (only using a prefix of one underscore)
  that are called from modules.  The macros mtx_{un,}lock_{spin,}_flags()
  are mapped to the __mtx_* macros inside of the kernel to inline the
  usual case of mutex operations and map to the internal _mtx_* functions
  in the module case so that modules will use WITNESS and KTR logging if
  the kernel is compiled with support for it.
2001-03-28 02:40:47 +00:00
John Baldwin
034dc442ad - Add the new critical_t type used to save state inside of critical
sections.
- Add implementations of the critical_enter() and critical_exit() functions
  and remove restore_intr() and save_intr().
- Remove the somewhat bogus disable_intr() and enable_intr() functions on
  the alpha as the alpha actually uses a priority level and not simple bit
  flag on the CPU.
2001-03-28 02:31:54 +00:00
Thomas Moestl
368d2edce4 Export intrnames and intrcnt as sysctls (hw.nintr, hw.intrnames and
hw.intrcnt).

Approved by:	rwatson
2001-03-23 03:45:17 +00:00
Peter Wemm
6eb39ac8fc Use a generic implementation of the Fowler/Noll/Vo hash (FNV hash).
Make the name cache hash as well as the nfsnode hash use it.

As a special tweak, create an unsigned version of register_t.  This allows
us to use a special tweak for the 64 bit versions that significantly
speeds up the i386 version (ie: int64 XOR int64 is slower than int64
XOR int32).

The code layout is a little strange for the string function, but I was
able to get between 5 to 10% improvement over the original version I
started with. The layout affects gcc code generation choices and this way
was fastest on x86 and alpha.

Note that 'CPUTYPE=p3' etc makes a fair difference to this.  It is
around 45% faster with -march=pentiumpro on a p6 cpu.
2001-03-17 09:31:06 +00:00
Peter Wemm
50e2347e68 Kill the 4MB kernel limit dead. [I hope :-)].
For UP, we were using $tmp_stk as a stack from the data section.  If the
kernel text section grew beyond ~3MB, the data section would be pushed
beyond the temporary 4MB P==V mapping.  This would cause the trampoline
up to high memory to fault.  The hack workaround I did was to use all of
the page table pages that we already have while preparing the initial
P==V mapping, instead of just the first one.
For SMP, the AP bootstrap process suffered the same sort of problem and
got the same treatment.

MFC candidate - this breaks on 4.x just the same..

Thanks to:	Richard Todd <rmtodd@ichotolot.servalan.com>
2001-03-15 05:10:06 +00:00
John Baldwin
5db078a9be Fix mtx_legal2block. The only time that it is bad to block on a mutex is
if we hold a spin mutex, since we can trivially get into deadlocks if we
start switching out of processes that hold spinlocks.  Checking to see if
interrupts were disabled was a sort of cheap way of doing this since most
of the time interrupts were only disabled when holding a spin lock.  At
least on the i386.  To fix this properly, use a per-process counter
p_spinlocks that counts the number of spin locks currently held, and
instead of checking to see if interrupts are disabled in the witness code,
check to see if we hold any spin locks.  Since child processes always
start up with the sched lock magically held in fork_exit(), we initialize
p_spinlocks to 1 for child processes.  Note that proc0 doesn't go through
fork_exit(), so it starts with no spin locks held.

Consulting from:	cp
2001-03-09 07:24:17 +00:00
David Malone
f88eb01140 Spell what was originally "unsigned long" as "unsigned long" again,
to cut down on some compiler warnings caused by lexically mismatched
types.

Reviewed by:	bde
2001-03-06 11:35:04 +00:00
KATO Takenori
e70db7b576 Merged from sys/i386/include/bus_at386.h revision 1.13. 2001-03-02 08:31:38 +00:00
Matthew N. Dodd
c7411c02f5 version 1.7 made some changes to correct problems identifed by compiling
with egcs-1.1.1.  bus_space_write_multi_2() had an extra operation that
should have been removed.

Remove it.

This fixes the panic when bus_space_write_multi_2() is used.

Obtained from:		jake
2001-03-02 05:33:53 +00:00
Peter Wemm
5107b058bc Always use the ELF naming after the demise of asnames.h. 2001-02-25 07:23:03 +00:00
Jake Burkholder
02318dac2c Remove the leading underscore from all symbols defined in x86 asm
and used in C or vice versa.  The elf compiler uses the same names
for both.  Remove asnames.h with great prejudice; it has served its
purpose.

Note that this does not affect the ability to generate an aout kernel
due to gcc's -mno-underscores option.

moral support from:	peter, jhb
2001-02-25 06:29:04 +00:00
Jake Burkholder
631d7bf3da - Rename the lcall system call handler from Xsyscall to Xlcall_syscall
to be more like Xint0x80_syscall and less like c function syscall().
- Reduce code duplication between the int0x80 and lcall handlers by
  shuffling the elfags into the right place, saving the sizeof the
  instruction in tf_err and jumping into the common int0x80 code.

Reviewed by:	peter
2001-02-25 02:53:06 +00:00