Commit Graph

1404 Commits

Author SHA1 Message Date
Nate Lawson
4c4381e288 Add an implementation of cpu_est_clockrate(9). This function estimates the
current clock frequency for the given CPU id in units of Hz.
2005-02-04 05:32:56 +00:00
Warner Losh
1f0ce611b3 nit in /*- 2005-01-31 08:16:45 +00:00
Marcel Moolenaar
b71bca0f84 Fix handling of post increment: Either the first or second operand
is the register with the memory address, and it's that register's
value we need to increment or decrement.

MFC after: 3 days
2005-01-27 06:01:44 +00:00
Scott Long
9580b6766e Fix compile errors. Bah. 2005-01-18 11:06:34 +00:00
Scott Long
a9e9b7e47b Fix an assignment that I missed in the last commit. 2005-01-15 20:03:59 +00:00
Scott Long
33072f4de7 Add bus_dmamap_load_mbuf_sg() to ia64 2005-01-15 19:26:17 +00:00
John Baldwin
f4ef9cec40 - Remove some OBE comments regarding cpu_exit(). cpu_exit() is no longer
the last action of kern_exit().  Instead, it is a MD callout to cleanup
  per-process state during exit.
- Add notes of concern to Alpha and ia64 about the possible need to drop
  fp state in cpu_thread_exit() rather than in cpu_exit() since it is
  per-thread state rather than per-process.
2005-01-14 20:13:04 +00:00
Warner Losh
86cb007f9f /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 22:18:23 +00:00
Marcel Moolenaar
2fa9a15eca Further enhance the handling of misaligned loads and stores:
o  implement double-extended and single precision loads and stores,
o  implement double precision stores,
o  replace the machdep.unaligned_print sysctl with debug.unaligned_print
   and change the default value to 0,
o  replace the machdep.unaligned_sigbus sysctl with debug.unaligned_test,
o  Remmove the fillfd() function. The function is trvial enough for
   inline assembly.

The debug.unaligned_test sysctl is used to test the emulation of
misaligned loads and stores. When PSR.ac is 0, the CPU will handle
misaligned memory accesses itselfi and we don't get an exception
for it. When PSR.ac is 1, the process needs to be signalled and we
should not emulate. The sysctl takes effect when PSR.ac is 1 and
tells us that we should emulate and not send a signal.

PR: 72268
MFC after: 1 week
2005-01-02 00:20:54 +00:00
Alan Cox
1f70d62298 Modify pmap_enter_quick() so that it expects the page queues to be locked
on entry and it assumes the responsibility for releasing the page queues
lock if it must sleep.

Remove a bogus comment from pmap_enter_quick().

Using the first change, modify vm_map_pmap_enter() so that the page queues
lock is acquired and released once, rather than each time that a page
is mapped.
2004-12-23 20:16:11 +00:00
Alan Cox
85f5b24573 In the common case, pmap_enter_quick() completes without sleeping.
In such cases, the busying of the page and the unlocking of the
containing object by vm_map_pmap_enter() and vm_fault_prefault() is
unnecessary overhead.  To eliminate this overhead, this change
modifies pmap_enter_quick() so that it expects the object to be locked
on entry and it assumes the responsibility for busying the page and
unlocking the object if it must sleep.  Note: alpha, amd64, i386 and
ia64 are the only implementations optimized by this change; arm,
powerpc, and sparc64 still conservatively busy the page and unlock the
object within every pmap_enter_quick() call.

Additionally, this change is the first case where we synchronize
access to the page's PG_BUSY flag and busy field using the containing
object's lock rather than the global page queues lock.  (Modifications
to the page's PG_BUSY flag and busy field have asserted both locks for
several weeks, enabling an incremental transition.)
2004-12-15 19:55:05 +00:00
Marcel Moolenaar
7126a966b3 Fix the last of the instability and the cause of the annoying
"vm_fault: fault on nofault entry, addr: %lx" panic. The problem was a
stale PTE in the TLB that marked the page as not present, even though
we had a good PTE in the VHPT. We typically don't yet insert PTEs in
the TLB. We do that lazily. The CPU will look for the PTE in the VHPT
when there's no PTE in the TLB. Unfortunately this doesn't handle the
case of the stale PTE in the TLB. The quick fix is to invalidate the
TLB (sloppily) when the VHPT doesn't contain a valid PTE. This is also
the only case that may cause a PTE in the TLB that marks a page as
non-present.
2004-12-12 19:27:58 +00:00
Marcel Moolenaar
3579953091 Use primitive types to avoid creating an artificial header dependency:
o  s/u_long/unsigned long/
o  s/uint32_t/unsigned int/g
o  s/uint64_t/unsigned long/g

Trigger case: multimedia/mpeg2codec
2004-12-11 06:15:12 +00:00
Marcel Moolenaar
f5929532f1 Don't obtain the HCDP address directly from the bootinfo structure.
Use a function to keep the details at arms length from uart(4).
2004-12-08 05:46:54 +00:00
Marcel Moolenaar
bcc5241c43 Change gdb_cpu_setreg() to not take the value to which to set the
specified register, but a pointer to the in-memory representation of
that value. The reason for this is twofold:
1. Not all registers can be represented by a register_t. In particular
   FP registers fall in that category. Passing the new register value
   by reference instead of by value makes this point moot.
2. When we receive a G or P packet, both are for writing a register,
   the packet will have the register value in target-byte order and
   in the memory representation (modulo the fact that bytes are sent
   as 2 printable hexadecimal numbers of course). We only need to
   decode the packet to have a pointer to the register value.

This change fixes the bug of extracting the register value of the P
packet as a hexadecimal number instead of as a bit array. The quick
(and dirty) fix to bswap the register value in gdb_cpu_setreg() as
it has been added on i386 and amd64 can therefore be removed and has
in fact been that.

Tested on: alpha, amd64, i386, ia64, sparc64
2004-12-01 06:40:35 +00:00
Marcel Moolenaar
c0678028d7 Whitespace fixes:
o  Remove a bogus comment that relates to alpha.
o  s/u_int64_t/uint64_t/g
o  Add bi_spare2 to make the internal padding explicit.
o  Move BOOTINFO_MAGIC after the field it applies to.
2004-11-28 04:34:17 +00:00
David Schultz
6004362e66 Don't include sys/user.h merely for its side-effect of recursively
including other headers.
2004-11-27 06:51:39 +00:00
Marcel Moolenaar
2ba0042660 Remove struct ia64_itir and use a plain old uint64_t instead. 2004-11-21 21:40:08 +00:00
David Schultz
ab44ebf537 Remove UAREA_PAGES.
Reviewed by:	arch@
2004-11-20 02:29:50 +00:00
David Schultz
11111b709f U areas are going away, so don't allocate one for process 0.
Reviewed by:	arch@
2004-11-20 02:29:25 +00:00
David Schultz
ff3fd2e764 user.h is included only to get pcb.h, so use the latter directly instead. 2004-11-20 02:28:14 +00:00
Marcel Moolenaar
a0c88fb1d9 Remove the BR tag. When the machine doesn't have the DIG64 HCDP
table with console settings, we now only need to know at which
address the UART lives. Leaving the baudrate unspecified results
in us using the baudrate at which the UART operates. This removes
one parameter that can interfere with a successful installation
out of the box.
2004-11-14 23:42:48 +00:00
John Baldwin
d39d4a6e64 - Change the ddb paging "support" to use a variable (db_lines_per_page) to
control the number of lines per page rather than a constant.  The variable
  can be examined and changed in ddb as '$lines'.  Setting the variable to
  0 will effectively turn off paging.
- Change db_putchar() to force out pending whitespace before outputting
  newlines and carriage returns so that one can rub out content on the
  current line via '\r     \r' type strings.
- Change the simple pager to rub out the --More-- prompt explicitly when
  the routine exits.
- Add some aliases to the simple pager to make it more compatible with
  more(1): 'e' and 'j' do a single line.  'd' does half a page, and
  'f' does a full page.

MFC after:	1 month
Inspired by:	kris
2004-11-01 22:15:15 +00:00
Poul-Henning Kamp
32204b9721 Use bioq_takefirst() 2004-10-23 12:44:19 +00:00
Poul-Henning Kamp
95bc568977 Add new function ttyinitmode() which sets our systemwide default
modes on a tty structure.

Both the ".init" and the current settings are initialized allowing
the function to be used both at attach and open time.

The function takes an argument to decide if echoing should be enabled.
Echoing should not be enabled for regular physical serial ports
unless they are consoles, in which case they should be configured
by ttyconsolemode() instead.

Use the new function throughout.
2004-10-18 21:51:27 +00:00
Nate Lawson
8f528832e5 Print flags in the nexus for child devices. 2004-10-14 22:36:47 +00:00
Nate Lawson
31ad3b8802 Move the code for halting the CPU (acpi_cpu_c1) into machdep files.
This removes the last MD portion of acpi_cpu.c.

MFC after:	2 weeks
2004-10-11 05:39:15 +00:00
Marcel Moolenaar
07cf947238 Add the Madison II, which is the second generation Madison. The Madison II
is model 2 in the Itanium 2 family and has up to 9MB of L3 cache and clocks
higher than 1.5Ghz. There's no LV variant AFAICT.
2004-10-06 02:43:28 +00:00
Alan Cox
8ceb3dcb60 The physical address stored in the vm_page is page aligned. There is no
need to mask off the page offset bits.  (This operation made some sense
prior to i386/i386/pmap.c revision 1.254 when we passed a physical address
rather than a vm_page pointer to pmap_enter().)
2004-10-03 00:16:43 +00:00
Alan Cox
07b3303943 Eliminate unnecessary uses of PHYS_TO_VM_PAGE() from pmap_enter(). These
uses predate the change in the pmap_enter() interface that replaced the
page's physical address by the address of its vm_page structure.  The
PHYS_TO_VM_PAGE() was being used to compute the address of the same vm_page
structure that was being passed in.
2004-10-02 07:34:58 +00:00
Marcel Moolenaar
287e12f172 ...And fix WITNESS builds: declare syscallnames. 2004-09-26 20:39:56 +00:00
Marcel Moolenaar
feae534e49 Fix INVARIANTS build: Include <machine/cpu.h>. 2004-09-26 00:38:56 +00:00
Marcel Moolenaar
03bfdd1362 Move the IA-32 trap handling from trap() to ia32_trap(). Move the
ia32_syscall() function along with it to ia32_trap.c. When COMPAT_IA32
is not defined, we'll raise SIGEMT instead.
2004-09-25 04:27:44 +00:00
Marcel Moolenaar
0c32530bb7 Redefine a PTE as a 64-bit integral type instead of a struct of
bit-fields. Unify the PTE defines accordingly and update all
uses.
2004-09-23 00:05:20 +00:00
Marcel Moolenaar
0675c65d6b s/u_int#_t/uint#_t/g 2004-09-22 23:12:46 +00:00
Marcel Moolenaar
08d3edb315 For the atomic_{add|clear|set|subtract} family of inlines, return the
old or previous value instead of void. This is not as is documented
in atomic(9), but is API (and ABI) compatible and simply makes sense.
This feature will primarily be used for atomic PTE updates in PMAP/ng.
2004-09-22 19:58:43 +00:00
Marcel Moolenaar
5c48823c36 MFp4: various style fixes, including
o  s/u_int/uint/g
o  s/#define<sp>/#define<tab>/g
o  indent macro definitions
o  Improve vertical spacing
o  Globally align line continuation character
2004-09-22 19:47:42 +00:00
John Baldwin
76764432e4 - Add support for "paging" in stack trace output. That is, when you do
a stack trace from ddb, the output will pause with a '--More--' prompt
  every 18 lines.  If you hit Enter, it will print another line and prompt
  again.  If you hit space it will output another page and then prompt.
  If you hit 'q' or 'x' it will abort the rest of the stack trace.
- Fix the sparc64 userland stack trace to honor the total count of lines
  to print.  This is useful if your trace happens to walk back onto
  0xdeadc0de and gets stuck in an endless loop.

MFC after:	1 month
Tested on:	i386, alpha, sparc64
2004-09-20 19:05:32 +00:00
Marcel Moolenaar
13e6668525 MFp4:
Completely remove the remaining EFI includes and add our own (type)
definitions instead. While here, abstract more of the internals by
providing interface functions.
2004-09-19 03:50:46 +00:00
Alan Cox
7580b56bdc Release the page queues lock earlier in pmap_protect() and pmap_remove() in
order to reduce contention.
2004-09-18 22:56:58 +00:00
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
Poul-Henning Kamp
672c05d49c Preparation commit for the tty cleanups that will follow in the near
future:

rename ttyopen() -> tty_open() and ttyclose() -> tty_close().

We need the ttyopen() and ttyclose() for the new generic cdevsw
functions for tty devices in order to have consistent naming.
2004-07-15 20:47:41 +00:00
Alan Cox
3d2e54c317 Push down the acquisition and release of the page queues lock into
pmap_protect() and pmap_remove().  In general, they require the lock in
order to modify a page's pv list or flags.  In some cases, however,
pmap_protect() can avoid acquiring the lock.
2004-07-15 18:00:43 +00:00
Alan Cox
72826d0f4a A loop in pmap_remove() should use TAILQ_FOREACH_SAFE(), not
TAILQ_FOREACH(), because the loop deletes elements from the list.

Reviewed by:	marcel@
2004-07-15 03:20:00 +00:00
David Xu
53dbf30349 Add ptrace_clear_single_step(), alpha already has it for years, the function
will be used by ptrace to clear a thread's single step state.
2004-07-13 07:22:56 +00:00
Alan Cox
440382a953 Simplify pmap_protect(). 2004-07-13 06:54:23 +00:00
Alan Cox
ce8da3091f Push down the acquisition and release of the page queues lock into
pmap_remove_pages().  (The implementation of pmap_remove_pages() is
optional.  If pmap_remove_pages() is unimplemented, the acquisition and
release of the page queues lock is unnecessary.)

Remove spl calls from the alpha, arm, and ia64 pmap_remove_pages().
2004-07-13 02:49:22 +00:00
Marcel Moolenaar
8bcb1e9e84 Add options KDB and GDB. KDB takes on the function of what DDB used
to be. Both DDB and GDB specify which KDB backends to include.
2004-07-11 03:20:09 +00:00
Marcel Moolenaar
1ca618fcaa Remove the now unused GDB stubs. See src/sys/gdb/* for the new KDB
backend.
2004-07-11 01:47:26 +00:00
Marcel Moolenaar
37224cd3fc Mega update for the KDB framework: turn DDB into a KDB backend.
Most of the changes are a direct result of adding thread awareness.
Typically, DDB_REGS is gone. All registers are taken from the
trapframe and backtraces use the PCB based contexts. DDB_REGS was
defined to be a trapframe on all platforms anyway.
Thread awareness introduces the following new commands:
	thread X	switch to thread X (where X is the TID),
	show threads	list all threads.

The backtrace code has been made more flexible so that one can
create backtraces for any thread by giving the thread ID as an
argument to trace.

With this change, ia64 has support for breakpoints.
2004-07-10 23:47:20 +00:00
Marcel Moolenaar
6d33366c74 Update for the KDB framework:
o  ksym_start and ksym_end changed type to vm_offset_t.
o  Make debugging support conditional upon KDB instead of DDB.
o  Call kdb_enter() instead of breakpoint().
o  Remove implementation of Debugger().
o  Call kdb_trap() according to the new world order.

unwinder:
o  s/db_active/kdb_active/g
o  Various s/ddb/kdb/g
o  Add support for unwinding from the PCB as well as the trapframe.
   Abuse a spare field in the special register set to flag whether
   the PCB was actually constructed from a trapframe so that we can
   make the necessary adjustments.

md_var.h:
o   Add RSE convenience macros.
o   Add ia64_bsp_adjust() to add or subtract from BSP while taking
    NaT collections into account.
2004-07-10 22:59:30 +00:00
Marcel Moolenaar
5a39cbaf69 Implement makectx(). The makectx() function is used by KDB to create
a PCB from a trapframe for purposes of unwinding the stack. The PCB
is used as the thread context and all but the thread that entered the
debugger has a valid PCB.
This function can also be used to create a context for the threads
running on the CPUs that have been stopped when the debugger got
entered. This however is not done at the time of this commit.
2004-07-10 19:56:00 +00:00
Marcel Moolenaar
cbc174356c Introduce the KDB debugger frontend. The frontend provides a framework
in which multiple (presumably different) debugger backends can be
configured and which provides basic services to those backends.
Besides providing services to backends, it also serves as the single
point of contact for any and all code that wants to make use of the
debugger functions, such as entering the debugger or handling of the
alternate break sequence. For this purpose, the frontend has been
made non-optional.
All debugger requests are forwarded or handed over to the current
backend, if applicable. Selection of the current backend is done by
the debug.kdb.current sysctl. A list of configured backends can be
obtained with the debug.kdb.available sysctl. One can enter the
debugger by writing to the debug.kdb.enter sysctl.
2004-07-10 18:40:12 +00:00
Marcel Moolenaar
72d44f31a6 Introduce the GDB debugger backend for the new KDB framework. The
backend improves over the old GDB support in the following ways:
o  Unified implementation with minimal MD code.
o  A simple interface for devices to register themselves as debug
   ports, ala consoles.
o  Compression by using run-length encoding.
o  Implements GDB threading support.
2004-07-10 17:47:22 +00:00
Brian Somers
0ac4013324 Change the following environment variables to kernel options:
bootp -> BOOTP
    bootp.nfsroot -> BOOTP_NFSROOT
    bootp.nfsv3 -> BOOTP_NFSV3
    bootp.compat -> BOOTP_COMPAT
    bootp.wired_to -> BOOTP_WIRED_TO

- i.e. back out the previous commit.  It's already possible to
pxeboot(8) with a GENERIC kernel.

Pointed out by: dwmalone
2004-07-08 22:35:36 +00:00
Marcel Moolenaar
1e3e78d239 MFamd64 (1.275):
Reduce the scope of the Giant lock being held for non-mpsafe syscalls.
There was way too much code being covered.
2004-07-08 21:08:07 +00:00
Marcel Moolenaar
469df33664 Better handle the break instruction trap. The runtime specification
has outlined which break numbers are software interrupts, debugger
breakpoints and ABI specific breaks. We mostly treated all break
numbers we didn't care about as debugger breakpoints.
2004-07-08 16:30:42 +00:00
Brian Somers
59e1ebc9b5 Change the following kernel options to environment variables:
BOOTP -> bootp
    BOOTP_NFSROOT -> bootp.nfsroot
    BOOTP_NFSV3 -> bootp.nfsv3
    BOOTP_COMPAT -> bootp.compat
    BOOTP_WIRED_TO -> bootp.wired_to

This lets you PXE boot with a GENERIC kernel by putting this sort of thing
in loader.conf:

    bootp="YES"
    bootp.nfsroot="YES"
    bootp.nfsv3="YES"
    bootp.wired_to="bge1"

or even setting the variables manually from the OK prompt.
2004-07-08 13:40:33 +00:00
Alan Cox
8fe61389a7 - Correct pmap_extract()'s return type. It should be vm_paddr_t, not
vm_offset_t.
 - Convert pmap_extract() to the ANSI style of declaration.
2004-07-05 23:18:48 +00:00
John Baldwin
0c0b25ae91 Implement preemption of kernel threads natively in the scheduler rather
than as one-off hacks in various other parts of the kernel:
- Add a function maybe_preempt() that is called from sched_add() to
  determine if a thread about to be added to a run queue should be
  preempted to directly.  If it is not safe to preempt or if the new
  thread does not have a high enough priority, then the function returns
  false and sched_add() adds the thread to the run queue.  If the thread
  should be preempted to but the current thread is in a nested critical
  section, then the flag TDF_OWEPREEMPT is set and the thread is added
  to the run queue.  Otherwise, mi_switch() is called immediately and the
  thread is never added to the run queue since it is switch to directly.
  When exiting an outermost critical section, if TDF_OWEPREEMPT is set,
  then clear it and call mi_switch() to perform the deferred preemption.
- Remove explicit preemption from ithread_schedule() as calling
  setrunqueue() now does all the correct work.  This also removes the
  do_switch argument from ithread_schedule().
- Do not use the manual preemption code in mtx_unlock if the architecture
  supports native preemption.
- Don't call mi_switch() in a loop during shutdown to give ithreads a
  chance to run if the architecture supports native preemption since
  the ithreads will just preempt DELAY().
- Don't call mi_switch() from the page zeroing idle thread for
  architectures that support native preemption as it is unnecessary.
- Native preemption is enabled on the same archs that supported ithread
  preemption, namely alpha, i386, and amd64.

This change should largely be a NOP for the default case as committed
except that we will do fewer context switches in a few cases and will
avoid the run queues completely when preempting.

Approved by:	scottl (with his re@ hat)
2004-07-02 20:21:44 +00:00
Marcel Moolenaar
3d8f0528e5 Unbreak build: define __RMAN_RESOURCE_VISIBLE
See also src/sys/sys/rman.h rev. 1.21.
2004-06-30 23:55:14 +00:00
Nate Lawson
1a26ea7f2c Add machdep quirks functions. On i386, this disables acpi on systems with
BIOS dates earlier than Jan 1, 1999.  Add prototypes and quirks flags.
2004-06-30 04:42:29 +00:00
Alan Cox
2551e6f323 - Remove unused definitions.
- Move a definition inside the scope of a #ifdef _KERNEL.
2004-06-23 08:06:52 +00:00
Bruce Evans
4c5f10a672 Backed out previous commit. Blind substitution of dev_t by `struct cdev *'
was just wrong here because the dev_t's are user dev_t's.
2004-06-20 03:52:50 +00:00
Alan Cox
ffcbbfc220 Remove dead code related to pv entry allocation.
Reviewed by:	marcel@
2004-06-19 20:31:49 +00:00
Poul-Henning Kamp
89c9c53da0 Do the dreaded s/dev_t/struct cdev */
Bump __FreeBSD_version accordingly.
2004-06-16 09:47:26 +00:00
Alan Cox
52fae0ba6c Neither pmap_enter() nor pmap_enter_quick() should create pv entries for
unmanaged pages.

Tested by:	marcel@
2004-06-11 20:11:41 +00:00
Poul-Henning Kamp
1930e303cf Deorbit COMPAT_SUNOS.
We inherited this from the sparc32 port of BSD4.4-Lite1.  We have neither
a sparc32 port nor a SunOS4.x compatibility desire these days.
2004-06-11 11:16:26 +00:00
Alan Cox
4e302a62f7 Reduce the number of preallocated pv entries and lpte entries in
pmap_init().

Tested by:	marcel@
2004-06-11 04:24:35 +00:00
Poul-Henning Kamp
2140d01b27 Machine generated patch which changes linedisc calls from accessing
linesw[] directly to using the ttyld...() functions

The ttyld...() functions ar inline so there is no performance hit.
2004-06-04 16:02:56 +00:00
Tim J. Robbins
cc05397ffc Remove checks for curthread == NULL - it can't happen. 2004-06-03 10:22:47 +00:00
Poul-Henning Kamp
fd360128ff Add missing <sys/module.h> instances which were shadowed by the nested
include in <sys/kernel.h>
2004-06-03 05:58:30 +00:00
Tim J. Robbins
fa2a4d0595 Move TDF_DEADLKTREAT into td_pflags (and rename it accordingly) to avoid
having to acquire sched_lock when manipulating it in lockmgr(), uiomove(),
and uiomove_fromphys().

Reviewed by:	jhb
2004-06-03 01:47:37 +00:00
Poul-Henning Kamp
138fbf675a Gainfully employ the new ttyioctl in the trivial cases. 2004-06-01 13:49:28 +00:00
Thomas Moestl
65e29c4822 Retire cpu_sched_exit(); it is not used any more. 2004-05-26 12:09:39 +00:00
Bruce Evans
b2321e7cdb Moved most of the "MI" definitions and declarations from <machine/profile.h>
to <sys/gmon.h>.  Cleaned them up a little by not attempting to ifdef
for incomplete and out of date support for GUPROF in userland, as in
the sparc64 version.
2004-05-19 15:41:26 +00:00
Stefan Farfeleder
b1aa0ba527 <stdint.h> should define WINT_M{AX,IN} independent from whether WCHAR_MIN is
defined.  Otherwise first including <wchar.h> and then <stdint.h> leads to no
WINT_M{AX,IN} at all.

PR:		64956
Approved by:	das (mentor)
2004-05-18 16:04:57 +00:00
Marcel Moolenaar
875bcd3528 Fix typo in comment. While here, end the sentence with a period and
remove the empty line between the fdc and sio devices. The empty
line suggests that the comment applies to fdc only while it applies
to all following devices and options.

Typo spotted by: ru@
2004-05-17 18:36:14 +00:00
Marcel Moolenaar
ef1eb2f330 Unbreak build due to previous commit: now that elf_reloc_internal()
gets the relocation base passed in relocbase, we cannot declare a
local variable with the same name. Assume the argument holds the
same value as the local variable did...
2004-05-17 07:11:37 +00:00
Marcel Moolenaar
f2ab7b8bb0 filter out the fdc(4) and sio(4) devices and corresponding options.
Note that cy(4) uses COM_MULTIPORT, so we need to keep that option.
2004-05-17 07:03:01 +00:00
Peter Wemm
e8855d4f97 Make a small revision to the api between the elf linker core and the
elf_reloc() backends for two reasons.  First, to support the possibility
of there being two elf linkers in the kernel (eg: amd64), and second, to
pass the relocbase explicitly (for relocating .o format kld files).
2004-05-16 20:00:28 +00:00
Marcel Moolenaar
4c86725c82 Revert previous commit. We should not get any FP traps from within
the kernel. We can guarantee this by resetting the FP status register.
This masks all FP traps. The reason we did get FP traps was that we
didn't reset the FP status register in all cases.

Make sure to reset the FP status register in syscall(). This is one of
the places where it was forgotten.

While on the subject, reset the FP status register only when we trapped
from user space.
2004-05-07 05:35:31 +00:00
Marcel Moolenaar
99aa060c2b Make sure to sanitize the FP status register. Specifically this
masks all FP traps, which should not happen in the kernel.
2004-05-07 05:29:12 +00:00
Nate Lawson
869ec176fc Make unnecessary globals static and remove unused includes.
Pointed out by:	cscout
2004-05-06 02:18:58 +00:00
Nate Lawson
65a7c90189 Add an MI implementation of the ACPI global lock routines and retire the
individual asm versions.  The global lock is shared between the BIOS and
OS and thus cannot use our mutexes.  It is defined in section 5.2.9.1 of
the ACPI specification.

Reviewed by:	marcel, bde, jhb
2004-05-05 20:04:14 +00:00
Marcel Moolenaar
e160e18ba6 Floating-point faults and exceptions can happen in the kernel too.
Do not panic when it happens; handle them.

Run into by: das
2004-05-03 04:13:31 +00:00
Marcel Moolenaar
1b3564abb3 Catch- and cleanup:
o  Fix and improve comments and references,
o  Add PFIL_HOOKS, UFS_ACL and UFS_DIRHASH,
o  Switch from SCHED_4BSD to SCHED_ULE,
o  Remove SCSI_DELAY (there's no SCSI support),
2004-05-03 00:10:59 +00:00
David E. O'Brien
4e744b5e7f Spell Ethernet correctly. 2004-05-02 18:57:29 +00:00
Marcel Moolenaar
73b2b50372 Verify the MADT checksum before using the table.
Submitted by: njl
2004-05-01 04:08:14 +00:00
David Schultz
be3930682a Hide FLT_EVAL_METHOD and DECIMAL_DIG in pre-C99 compilation
environments.

PR:		63935
Submitted by:	Stefan Farfeleder <stefan@fafoe.narf.at>
2004-04-25 02:36:29 +00:00
Nate Lawson
8ec94874b2 Don't check for NULL, device_get_softc() always succeeds. 2004-04-21 02:10:58 +00:00
Alan Cox
3edd4a4094 MFamd64
Simplify the sf_buf implementation.  In short, make it a veneer
 over the direct virtual-to-physical mapping.
2004-04-18 07:11:12 +00:00
Alan Cox
4e67150a95 Remove a comment that refers to avail_start and avail_end as these
variables no longer exist.
2004-04-11 06:37:36 +00:00
Alan Cox
b14d6acced - pmap_kenter_temporary() is unused by machine-independent code. Therefore,
move its declaration to the machine-dependent header file on those
   machines that use it.  In principle, only i386 should have it.
   Alpha and AMD64 should use their direct virtual-to-physical mapping.
 - Remove pmap_kenter_temporary() from ia64.  It is unused.  Approved
   by: marcel@
2004-04-10 22:41:46 +00:00
Warner Losh
f36cfd49ad Remove advertising clause from University of California Regent's
license, per letter dated July 22, 1999 and email from Peter Wemm,
Alan Cox and Robert Watson.

Approved by: core, peter, alc, rwatson
2004-04-07 20:46:16 +00:00
Alan Cox
a3b706071c Remove avail_end. As of yesterday, it is unused. 2004-04-06 01:38:28 +00:00
Alan Cox
c8607538c8 Remove avail_start on those platforms that no longer use it. (Only amd64
does anything with it beyond simple initialization.)
2004-04-05 04:08:00 +00:00
Alan Cox
bdb93eb248 Remove unused arguments from pmap_init(). 2004-04-05 00:37:50 +00:00
Alan Cox
121230a40d In some cases, sf_buf_alloc() should sleep with pri PCATCH; in others, it
should not.  Add a new parameter so that the caller can specify which is
the case.

Reported by:	dillon
2004-04-03 09:16:27 +00:00
Marcel Moolenaar
60f66d9174 MFi386: correctly calculate the top-of-stack when a kthread is created
with a larger kernel stack. Remove inclusion of opt_kstack_pages.h now
that it's unused.
2004-03-27 17:44:25 +00:00
Marcel Moolenaar
6beee8df28 In breakpoint(), use a different immediate to make sure we can
distinguish between debugger inserted breakpoints and fixed
breakpoints. While here, make sure the break instruction never
ends up in the last slot of a bundle by forcing it to be an
M-unit instruction. This makes it easier for use to skip over
it.
2004-03-21 01:41:29 +00:00