Commit Graph

1264 Commits

Author SHA1 Message Date
Marcel Moolenaar
9f9ae8ebb7 Provide our own FPSWA definitions, instead of depending on the Intel
EFI headers and put them all in <machine/fpu.h>. The Intel EFI headers
conflict with the Intel ACPI headers (duplicate type definitions), so
are being phased out in the kernel.
2004-09-17 22:19:41 +00:00
Marcel Moolenaar
cba8d3ae49 Remove useless inclusion of <machine/fpu.h> 2004-09-17 20:42:45 +00:00
Poul-Henning Kamp
7ce1979be6 Add new a function isa_dma_init() which returns an errno when it fails
and which takes a M_WAITOK/M_NOWAIT flag argument.

Add compatibility isa_dmainit() macro which whines loudly if
isa_dma_init() fails.

Problem uncovered by:	tegge
2004-09-15 12:09:50 +00:00
Marcel Moolenaar
fa3b7cae8d Catch up with other platforms: switch the default scheduler to 4BSD. 2004-09-12 05:50:32 +00:00
Scott Long
50736a153b Fix a problem with tag->boundary inheritence that has existed since day one
and was propagated to nearly every platform.  The boundary of the child needs
to consider the boundary of the parent and pick the minimum of the two, not
the maximum.  However, if either is 0 then pick the appropriate one.
This bug was exposed by a recent change to ATA, which should now be fixed by
this change.  The alignment and maxsegsz tag attributes likely also need
a similar review in the near future.

This is a MT5 candidate.

Reviewed by: marcel
Submitted by: sos (in part)
2004-09-08 04:54:19 +00:00
Marcel Moolenaar
566d143be0 Sync the busdma code with i386. The most tangible upshot is that
the alignment and boundary constraints are being respected, which
fixes the reported ATA problems with SiI chips.
I consider the busdma implementation worrisome nonetheless. Not
only is there too much MI code duplicated in MD files, there's a
lot of questionable code. I smell a wholesale, cross-platform
overhaul coming...

MT5 candidate.
2004-09-08 02:55:04 +00:00
Julian Elischer
ed062c8d66 Refactor a bunch of scheduler code to give basically the same behaviour
but with slightly cleaned up interfaces.

The KSE structure has become the same as the "per thread scheduler
private data" structure. In order to not make the diffs too great
one is #defined as the other at this time.

The KSE (or td_sched) structure is  now allocated per thread and has no
allocation code of its own.

Concurrency for a KSEGRP is now kept track of via a simple pair of counters
rather than using KSE structures as tokens.

Since the KSE structure is different in each scheduler, kern_switch.c
is now included at the end of each scheduler. Nothing outside the
scheduler knows the contents of the KSE (aka td_sched) structure.

The fields in the ksegrp structure that are to do with the scheduler's
queueing mechanisms are now moved to the kg_sched structure.
(per ksegrp scheduler private data structure). In other words how the
scheduler queues and keeps track of threads is no-one's business except
the scheduler's. This should allow people to write experimental
schedulers with completely different internal structuring.

A scheduler call sched_set_concurrency(kg, N) has been added that
notifies teh scheduler that no more than N threads from that ksegrp
should be allowed to be on concurrently scheduled. This is also
used to enforce 'fainess' at this time so that a ksegrp with
10000 threads can not swamp a the run queue and force out a process
with 1 thread, since the current code will not set the concurrency above
NCPU, and both schedulers will not allow more than that many
onto the system run queue at a time. Each scheduler should eventualy develop
their own methods to do this now that they are effectively separated.

Rejig libthr's kernel interface to follow the same code paths as
linkse for scope system threads. This has slightly hurt libthr's performance
but I will work to recover as much of it as I can.

Thread exit code has been cleaned up greatly.
exit and exec code now transitions a process back to
'standard non-threaded mode' before taking the next step.
Reviewed by:	scottl, peter
MFC after:	1 week
2004-09-05 02:09:54 +00:00
Marcel Moolenaar
44af2aa001 Add aac(4) and aacp(4). The driver is 64-bit clean for roughly a year
now and has been mentioned on the freebsd-ia64 list.
2004-09-02 18:05:26 +00:00
Julian Elischer
5995adc206 Remove an unneeded argument..
The removed argument could trivially be derived from the remaining one.
That in turn should be the same as curthread, but it is possible that curthread could be expensive to derive on some syste,s so leave it as an argument.
Having both proc and thread as an argumen tjust gives an opportunity for
them to get out sync.

MFC after:	3 days
2004-08-31 07:34:54 +00:00
Julian Elischer
99e9dcb817 Remove sched_free_thread() which was only used
in diagnostics. It has outlived its usefulness and has started
causing panics for people who turn on DIAGNOSTIC, in what is otherwise
good code.

MFC after:	2 days
2004-08-31 06:12:13 +00:00
Alan Cox
bfa15df9ba Remove unnecessary check for curthread == NULL. 2004-08-30 03:52:05 +00:00
Marcel Moolenaar
224407d6a8 s/ENTRY/ENTRY_NOPROFILE/g for particular functions that do not follow
the C calling convention or are otherwise not regular functions. This
allows us to boot a profiling kernel.
2004-08-30 01:32:28 +00:00
Marcel Moolenaar
82ecff453f Catch up with the drive-by renaming of IA32 to COMPAT_IA32. Missed
11 days ago when all the other places were fixed and finally caught
by the tinderbox run...
2004-08-27 21:57:00 +00:00
Marcel Moolenaar
0f2fe153bc Move the kernel-specific logic to adjust frompc from MI to MD. For
these two reasons:
1. On ia64 a function pointer does not hold the address of the first
   instruction of a functions implementation. It holds the address
   of a function descriptor. Hence the user(), btrap(), eintr() and
   bintr() prototypes are wrong for getting the actual code address.
2. The logic forces interrupt, trap and exception entry points to
   be layed-out contiguously. This can not be achieved on ia64 and is
   generally just bad programming.

The MCOUNT_FROMPC_USER macro is used to set the frompc argument to
some kernel address which represents any frompc that falls outside
the kernel text range. The macro can expand to ~0U to bail out in
that case.
The MCOUNT_FROMPC_INTR macro is used to set the frompc argument to
some kernel address to represent a call to a trap or interrupt
handler. This to avoid that the trap or interrupt handler appear to
be called from everywhere in the call graph. The macro can expand
to ~0U to prevent adjusting frompc. Note that the argument is selfpc,
not frompc.

This commit defines the macros on all architectures equivalently to
the original code in sys/libkern/mcount.c. People can take it from
here...

Compile-tested on: alpha, amd64, i386, ia64 and sparc64
Boot-tested on: i386
2004-08-27 19:42:35 +00:00
Alan Cox
8991a235cb The machine-independent parts of the virtual memory system always pass a
valid pmap to the pmap functions that require one.  Remove the checks for
NULL.  (These checks have their origins in the Mach pmap.c that was
integrated into BSD.  None of the new code written specifically for
FreeBSD included them.)
2004-08-27 19:06:17 +00:00
Andre Oppermann
c21fd23260 Always compile PFIL_HOOKS into the kernel and remove the associated kernel
compile option.  All FreeBSD packet filters now use the PFIL_HOOKS API and
thus it becomes a standard part of the network stack.

If no hooks are connected the entire packet filter hooks section and related
activities are jumped over.  This removes any performance impact if no hooks
are active.

Both OpenBSD and DragonFlyBSD have integrated PFIL_HOOKS permanently as well.
2004-08-27 15:16:24 +00:00
Marcel Moolenaar
04f093dde7 Get a step closer to profiling the kernel by fixing the definitions
of the MCOUNT_ENTER, MCOUNT_EXIT and MCOUNT_DECL defines. Also make
sure there's a prototype of _MCOUNT_DECL(). This allows us to build
a kernel. There are still unresolved symbols, so linking fails.
2004-08-25 08:03:48 +00:00
Marcel Moolenaar
f0556e70bb Make profiling actually work. The gcc compiler emits a call to the
_mcount() stub when profiling is enabled. Emit this code sequence
for assembly routines as welli (MCOUNT definition in <machine/asm.h>.
We do not pass the GOT entry however as the 4th argument, because it's
not used. The _mcount() stub calls __mcount(), which does the actual
work. Define _MCOUNT_DECL to define __mcount. We do not have an
implementation of mcount(), so we define MCOUNT as empty, but have a
weak alias to _mcount() in _mcount.S.
Note that the _mcount() stub in the kernel is slightly different from
the stub in userland. This is because we do not have to worry about
nested routines in the kernel.
2004-08-25 07:42:34 +00:00
Nate Lawson
dc6851d588 Catch up with i386 nexus.c rev 1.59: add bus_get_resource_list(). 2004-08-24 19:22:54 +00:00
David E. O'Brien
6cda6c4a35 sr(4) definately won't work on IA64. 2004-08-24 18:31:27 +00:00
Arun Sharma
2d24da614a The existing code fails some corner cases. Replace it with
ia64_bsp_adjust() which has been tested to work in all cases for
arbitrary (bsp, nslots) combinations.

reviewed by: marcel@
2004-08-16 22:09:58 +00:00
Marcel Moolenaar
344bbdbd54 As I said: the previous commit was untested... Remove an #endif which
should have ceased to exist when its corresponding #if was removed.
2004-08-16 19:05:08 +00:00
Marcel Moolenaar
97752b2cbd Catch up with the drive-by renaming of IA32 to COMPAT_IA32. It must
have been rush hour...

While here, move COMPAT_IA32 from opt_global.h to opt_compat.h like on
amd64. Consequently, it's unsafe to use the option in pcb.h. We now
unconditionally have the ia32 specific registers in the PCB.

This commit is untested.
2004-08-16 18:54:23 +00:00
Arun Sharma
646c6dd2c0 ITC.{i,d} instructions use format M41 not M42.
reviewed by: marcel@
2004-08-16 18:41:24 +00:00
Marcel Moolenaar
c66fdb617d Allocate memory in the unwinder with M_NOWAIT. We may need to provide
backtraces with locks held.
2004-08-14 05:00:37 +00:00
Marcel Moolenaar
3a00930042 In set_regs(), flush the dirty registers onto the backingstore before
we update the registers. That way we don't have any dirty registers to
worry about and also know that bsp=bspstore, which makes updating the
RSE related registers predictable.
This is not the end of it. We need more validity checks, but for now
this allows us to complete the gdb testsuite without crashing the
kernel.
2004-08-11 05:29:13 +00:00
Marcel Moolenaar
4da47b2fec Add __elfN(dump_thread). This function is called from __elfN(coredump)
to allow dumping per-thread machine specific notes. On ia64 we use this
function to flush the dirty registers onto the backingstore before we
write out the PRSTATUS notes.

Tested on: alpha, amd64, i386, ia64 & sparc64
Not tested on: arm, powerpc
2004-08-11 02:35:06 +00:00
Marcel Moolenaar
b4b7c60d70 Better preserve the original protection for the mappings we maintain.
The hardware always gives read access for privilege level 0, which
means that we cannot use the hardware access rights and privilege
level in the PTE to test whether there's a change in protection.  So,
we save the original vm_prot_t in the PTE as well.
Add pmap_pte_prot() to set the proper access rights and privilege
level on the PTE given a pmap and the requested protection.

The above allows us to compare the protection in pmap_extract_and_hold()
which was missing. While in pmap_extract_and_hold(), add pmap locking.

While here, clean up most (i.e. all but one) PTE macros we inherited
from alpha. They were either unused, used inconsistently, badly named
or simply weren't beneficial. We save the wired and managed state of
the PTE in distinct (bit) fields.

While in pte.h, s/u_int64_t/uint64_t/g

pmap locking obtained from: alc@
feedback & review by: alc@
2004-08-09 20:44:41 +00:00
Marcel Moolenaar
47a86e3cd4 Implement single stepping when we leave the kernel through the EPC syscall
path. The basic problem is that we cannot set the single stepping flag
directly, because we don't leave the kernel via an interrupt return. So,
we need another way to set the single stepping flag.
The way we do this is by enabling the lower-privilege transfer trap, which
gets raised when we drop the privilege level. However, since we're still
running in kernel space (sec), we're not yet done. We clear the lower-
privilege transfer trap, enable the taken-branch trap and continue exiting
the kernel until we branch into user space.
Given the current code, there's a total of two traps this way before
we can raise SIGTRAP.
2004-08-08 00:28:07 +00:00
Marcel Moolenaar
6aa84a056a Slightly move labels around to make sure we call ast() on our way out
after a fork(2) in fork_trampoline(). By moving the epc_syscall_return
label immediately before the call to do_ast() in epc_syscall(), we not
only achieve that but also handle the detour through exception_return
when the frame corresponds to an asynchronous kernel entry. Hence, we
simplified fork_trampoline() as a side-effect.
2004-08-07 21:55:15 +00:00
Marcel Moolenaar
7d9a8b1cd5 De-inline gdb_cpu_signal() because we need to convert the trap vectors
related to breakpoints and single stepping into SIGTRAP so gdb(1) knows
why the remote target has stopped. In particular, gdb(1) needs to know
if the reason is something of its own doing.
2004-08-07 21:40:52 +00:00
Arun Sharma
d7cf64c9a1 Use a 256MB TR instead of a 64MB TR to make sure that the kernel
text/data are covered on APs. This enables the kernel to boot on
a 4 way Intel Itanium-2 platform. This has a secondary effect of
keeping the TRs identical on BP and the APs.

reviewed by: marcel@
2004-08-04 20:09:41 +00:00
Mark Murray
d23a262fc5 Making a loadable null.ko for /dev/(null|zero) proved rather
unpopular, so remove this (mis)feature.

Encouragement provided by:	jhb (and others)
2004-08-03 19:24:54 +00:00
Maxime Henrion
9f1b87f106 Instead of calling ia32_pause() conditionally on __i386__ or __amd64__
being defined, define and use a new MD macro, cpu_spinwait().  It only
expands to something on i386 and amd64, so the compiled code should be
identical.

Name of the macro found by:	jhb
Reviewed by:	jhb
2004-08-03 18:44:27 +00:00
Marcel Moolenaar
78b9765bee Fix 2 typos in previous commit: both s/strct/struct/ 2004-08-02 18:37:55 +00:00
Marcel Moolenaar
cb1d0dd340 Add the mem and null devices now that they are optional. 2004-08-02 17:53:06 +00:00
Marcel Moolenaar
6d28b03026 Sort the miscellaneous devices to restore ordering after the insertion
of the mem and null devices.
2004-08-02 17:50:39 +00:00
Mark Murray
a5ed4a0ad5 Remove extraneous ';'. 2004-08-01 18:51:44 +00:00
Mark Murray
8ab2f5ecc5 Break out the MI part of the /dev/[k]mem and /dev/io drivers into
their own directory and module, leaving the MD parts in the MD
area (the MD parts _are_ part of the modules). /dev/mem and /dev/io
are now loadable modules, thus taking us one step further towards
a kernel created entirely out of modules. Of course, there is nothing
preventing the kernel from having these statically compiled.
2004-08-01 11:40:54 +00:00
Alan Cox
350fb8ae6a - Add pmap locking to ia64's pmap_enter() and pmap_enter_quick(). (This
brings ia64 to parity with alpha, amd64, and i386 in this area.)
 - Prevent a race in pmap_find_pte(): If pmap_find_pte() sleeps in
   uma_zalloc(), another thread could allocate a pte at the same address.
   Instead, sleep at a higher level and retry the lookup before retrying
   the allocation.

Reviewed and tested by:	marcel@
2004-07-30 20:25:12 +00:00
Marcel Moolenaar
f95c91bcee Fix -O builds with gcc 3.4 by defining ffs as __builtin_ffs instead of
creating an inline function that just calls __builtin_ffs.
2004-07-30 07:56:53 +00:00
Poul-Henning Kamp
0658bb8ef8 Move a relic to its correct location(s): Put nfs diskless initialization
calls with the code they call.  (Yet another example of mindless copy&paste).
2004-07-28 21:54:57 +00:00
Robert Watson
1a8cfbc450 Pass a thread argument into cpu_critical_{enter,exit}() rather than
dereference curthread.  It is called only from critical_{enter,exit}(),
which already dereferences curthread.  This doesn't seem to affect SMP
performance in my benchmarks, but improves MySQL transaction throughput
by about 1% on UP on my Xeon.

Head nodding:	jhb, bmilekic
2004-07-27 16:41:01 +00:00
Marcel Moolenaar
6dd19a884b Work-around a gcc code generation bug for function descriptors
references (target/16559). This fixes SMP configurations.

Obtained from: arun@
2004-07-25 07:07:09 +00:00
Alan Cox
e4242deba7 In pmap_mincore() create a private copy of the pte for use after the pmap
lock is released.
2004-07-22 02:05:46 +00:00
Alan Cox
756e6d1939 Additional pmap locking
Tested by: marcel@
2004-07-21 07:01:48 +00:00
Marcel Moolenaar
fd32d93b97 Unify db_stack_trace_cmd(). All it did was look up the thread given
the thread ID and call db_trace_thread().
Since arm has all the logic in db_stack_trace_cmd(), rename the
new DB_COMMAND function to db_stack_trace to avoid conflicts on
arm.
While here, have db_stack_trace parse its own arguments so that
we can use a more natural radix for IDs. If the ID is not a thread
ID, or more precisely when no thread exists with the ID, try if
there's a process with that ID and return the first thread in it.
This makes it easier to print stack traces from the ps output.

requested by: rwatson@
tested on: amd64, i386, ia64
2004-07-21 05:07:09 +00:00
David Schultz
479f8d2214 Make FLT_ROUNDS correctly reflect the dynamic rounding mode. 2004-07-19 08:17:25 +00:00
Alan Cox
4a5be3f70a Add partial pmap locking.
Tested by: marcel@
2004-07-19 05:39:49 +00:00
Alan Cox
6fe30ff3f2 Remove unused fields from the pmap. 2004-07-16 03:42:45 +00:00