Commit Graph

82 Commits

Author SHA1 Message Date
Poul-Henning Kamp
21144e3bf1 Remove B_READ, B_WRITE and B_FREEBUF and replace them with a new
field in struct buf: b_iocmd.  The b_iocmd is enforced to have
exactly one bit set.

B_WRITE was bogusly defined as zero giving rise to obvious coding
mistakes.

Also eliminate the redundant struct buf flag B_CALL, it can just
as efficiently be done by comparing b_iodone to NULL.

Should you get a panic or drop into the debugger, complaining about
"b_iocmd", don't continue.  It is likely to write on your disk
where it should have been reading.

This change is a step in the direction towards a stackable BIO capability.

A lot of this patch were machine generated (Thanks to style(9) compliance!)

Vinum users:  Greg has not had time to test this yet, be careful.
2000-03-20 10:44:49 +00:00
Søren Schmidt
47351d2774 Update the ata driver to take more advantage of newbus, this
was needed to make attach/detach of devices work, which is
needed for the PCCARD support.
(PCCARD support is still not working though, more to come on that)

Support the CMD646 chip which is used on many alphas, sadly only
in WDMA2 mode, as the silicon is broken beyond belief for UDMA modes.

Lots of cosmetic fixes here and there.

Sorry for the size of this megapatchfromhell but it was not
possible otherwise...

newbus patches based on work from: dfr (Doug Rabson)
2000-02-18 20:57:33 +00:00
Andrew Gallatin
a6db6c48bf The kernel side of per-process unaligned access control (printing, fixing &
delivering SIGBUS).  This will allow a non-superuser to control unaligned
access behaviour on a per-process basis once a userland control program
(uac) is written.

Reviewed by: obrien
Tested by:   obrien
2000-01-16 07:07:33 +00:00
Marcel Moolenaar
6257c6285a Sync with i386
\begin{quote}
Compile genassym.c with ordinary ${CFLAGS}.  The (small) needs for
${GEN_CFLAGS} and -U_KERNEL became negative when all all the
genassym.c's were converted to be cross-built.

Makefile.*:
- Cleanups associated with the old genassym.
- Fixed deprecated spelling of ${.IMPSRC} as "$<".
\end{quote}

Submitted by: bde
2000-01-08 16:43:46 +00:00
Marcel Moolenaar
9c0182bbdc Use genassym(1). 2000-01-07 14:58:47 +00:00
Peter Wemm
a942162d50 Revert back all the way to 1.11 - the problem was that Makefile.alpha was
out of sync.
2000-01-07 05:32:08 +00:00
Mike Smith
f06f6736b0 Don't include <sys/systm.h>. It doesn't do anything, and with recent
changes it breaks building genassym.
2000-01-07 00:38:02 +00:00
Matt Jacob
5fd0a3d5ae untangle some includes and clean up for compilation cleanliness. 2000-01-03 09:36:55 +00:00
Peter Wemm
664a31e496 Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL"
is an application space macro and the applications are supposed to be free
to use it as they please (but cannot).  This is consistant with the other
BSD's who made this change quite some time ago.  More commits to come.
1999-12-29 04:46:21 +00:00
Peter Wemm
453c03ac1b Make this compile again. (missing #include for RFPROC) 1999-12-06 18:12:29 +00:00
Luoqi Chen
91c28bfde0 User ldt sharing. 1999-12-06 04:53:08 +00:00
Peter Wemm
0171aaede2 Use %ll instead of %q as gcc moans bitterly about it. 1999-11-22 15:23:58 +00:00
Doug Rabson
62a50bfa38 Re-organise the code which manages the owner of the FP state (fpcurproc).
The old code was spread out through the machdep code and was sloppy about
enabling and disabling the FEN bit (which controls access to the FP
register set). This caused a DIAGNOSTIC warning "DANGER WILL ROBINSON:
FEN SET IN cpu_fork!" sometimes when operating under high loads and could
conceivably lead to processes getting incorrect FP results.

The new code is much more strict about the FEN bit and makes sure that
*only* fpcurproc ever has it enabled. This also allows us to remove a
section of code from the exception_return path which might improve
performance marginally.

Reviewed by: gallatin
1999-11-10 21:14:25 +00:00
Alan Cox
be72f78813 The core of this patch is to vm/vm_page.h. The effects are two-fold: (1) to
eliminate an extra (useless) level of indirection in half of the page
queue accesses and (2) to use a single name for each queue throughout,
instead of, e.g., "vm_page_queue_active" in some places and
"vm_page_queues[PQ_ACTIVE]" in others.

Reviewed by:	dillon
1999-10-30 07:37:14 +00:00
Poul-Henning Kamp
923502ff91 useracc() the prequel:
Merge the contents (less some trivial bordering the silly comments)
of <vm/vm_prot.h> and <vm/vm_inherit.h> into <vm/vm.h>.  This puts
the #defines for the vm_inherit_t and vm_prot_t types next to their
typedefs.

This paves the road for the commit to follow shortly: change
useracc() to use VM_PROT_{READ|WRITE} rather than B_{READ|WRITE}
as argument.
1999-10-29 18:09:36 +00:00
Doug Rabson
45f0aa1f0e * Implement bus_set/get/delete_resource for pci.
* Change the hack used on the alpha for mapping devices into DENSE or
  BWX memory spaces to a simpler one. Its still a hack and should be
  a seperate api to explicitly map the resource.
* Add $FreeBSD$ as necessary.
1999-10-14 21:38:33 +00:00
Marcel Moolenaar
91078fca0c sigset_t change (part 3 of 5)
-----------------------------

By introducing a new sigframe so that the signal handler operates
on the new siginfo_t and on ucontext_t instead of sigcontext, we
now need two version of sendsig and sigreturn.

A flag in struct proc determines whether the process expects an
old sigframe or a new sigframe. The signal trampoline handles
which sigreturn to call. It does this by testing for a magic
cookie in the frame.

The alpha uses osigreturn to implement longjmp. This means that
osigreturn is not only used for compatibility with existing
binaries. To handle the new sigset_t, setjmp saves it in
sc_reserved (see NOTE).

the struct sigframe has been moved from frame.h to sigframe.h
to handle the complex header dependencies that was caused by
the new sigframe.

NOTE: For the i386, the size of jmp_buf has been increased to hold
      the new sigset_t. On the alpha this has been prevented by
      using sc_reserved in sigcontext.
1999-09-29 15:06:27 +00:00
Matthew Dillon
4cc712004c Fix bug in pipe code relating to writes of mmap'd but illegal address
spaces which cross a segment boundry in the page table.  pmap_kextract()
    is not designed for access to the user space portion of the page
    table and cannot handle the null-page-directory-entry case.

    The fix is to have vm_fault_quick() return a success or failure which
    is then used to avoid calling pmap_kextract().
1999-09-20 19:08:48 +00:00
Peter Wemm
c3aac50f28 $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
Andrew Gallatin
34067f9475 Fix the child's return path from fork so that fork will return 0
in the child.  This corrects a problem where linux/alpha binaries see
the child's return value of fork as the parent's pid.  This happens because
linux/alpha binaries apparently check the return value directly, rather
than looking for a non-zero value in a4, as *BSD & OSF/1 do.

Reviewed by:dfr@nlsystems.com
1999-08-27 14:47:23 +00:00
Andrew Gallatin
da83f611c3 Fix a nasty kld bug where modules with objects of type GLOB_DAT which had
non-zero addends were being loaded incorrectly
1999-08-20 14:21:35 +00:00
Peter Wemm
ebf9e95f31 Update for MI switch code, and trim a heap of unused (I believe) entries. 1999-08-19 00:20:10 +00:00
John Polstra
0226f1b80d Sync with alc's revision 1.125 of i386/i386/vm_machdep.c. This
fixes the kernel build breakage.
1999-08-05 23:38:13 +00:00
Doug Rabson
aa595accc9 Add support for SYS_RES_DENSE and SYS_RES_BWX resource types. These are
equivalent to SYS_RES_MEMORY for x86 but for alpha, the rman_get_virtual()
address of the resource is initialised to point into either dense-mapped
or bwx-mapped space respectively, allowing direct memory pointers to be
used to device memory.

Reviewed by: Andrew Gallatin <gallatin@cs.duke.edu>
1999-07-28 07:57:48 +00:00
Alan Cox
3b21348301 Reduce the number of "magic constants" used for page coloring
by one: PQ_PRIME2 and PQ_PRIME3 are used to accomplish the same
thing at different places in the kernel.  Drop PQ_PRIME3.
1999-07-22 06:04:17 +00:00
Doug Rabson
0db16cc82d Handle R_ALPHA_NONE relocations in KLD. 1999-07-16 09:16:11 +00:00
Matt Jacob
3866f8e633 Add in dbregs stubs that a committer for changes on the i386 ought to have done.
PR:		12579
1999-07-09 17:48:22 +00:00
Jonathan Lemon
ab001a72be Implement support for hardware debug registers on the i386.
Submitted by:	Brian Dean <brdean@unx.sas.com>
1999-07-09 04:16:00 +00:00
Peter Wemm
7a263b1d92 Add alpha_platform_setup_ide_intr() and alpha_platform_assign_pciintr()
prototypes.
1999-07-01 22:47:53 +00:00
Peter Wemm
213954ae81 Declare busdma_swi() like on i386 version. 1999-07-01 21:58:38 +00:00
Peter Wemm
9c8b8baa38 Slight reorganization of kernel thread/process creation. Instead of using
SYSINIT_KT() etc (which is a static, compile-time procedure), use a
NetBSD-style kthread_create() interface.  kproc_start is still available
as a SYSINIT() hook.  This allowed simplification of chunks of the
sysinit code in the process.  This kthread_create() is our old kproc_start
internals, with the SYSINIT_KT fork hooks grafted in and tweaked to work
the same as the NetBSD one.

One thing I'd like to do shortly is get rid of nfsiod as a user initiated
process.  It makes sense for the nfs client code to create them on the
fly as needed up to a user settable limit.  This means that nfsiod
doesn't need to be in /sbin and is always "available".  This is a fair bit
easier to do outside of the SYSINIT_KT() framework.
1999-07-01 13:21:46 +00:00
Peter Wemm
ac1f1b4053 Revert back to not using -DKERNEL 1999-06-28 09:15:35 +00:00
Peter Wemm
9cccca53d8 Make genassym compile - the recent buf locking changes meant that more
things from #ifdef KERNEL were needed.
1999-06-26 12:45:17 +00:00
Dmitrij Tejblum
23405ee478 Replace my previous fix of saving the FP state with a much simpler one: when
we swap out fpcurproc, save its FP state.

Suggested by:	bde
1999-06-10 20:40:59 +00:00
Dmitrij Tejblum
be960acd20 Keep fpcurproc locked in memory, so that we always can save the FP state
correctly.

This should fix the "pmap_changebit didn't" panic that some people see.

Reviewed by:	dfr
1999-06-08 16:42:19 +00:00
Bruce Evans
bb86f61a79 Fixed style bugs in previous commit. 1999-05-22 08:36:55 +00:00
Andrey A. Chernov
80a290844b Set CHAR_{MIN,MAX} according to -funsigned-char flag given or not
PR: 11627
Submitted by: Petr Lampa <lampa@fee.vutbr.cz>
1999-05-20 23:33:35 +00:00
Dmitrij Tejblum
e415107779 Fixed several (not all) warnings. 1999-04-23 19:53:38 +00:00
Dmitrij Tejblum
f998a53420 Added consts to cpu_set_fork_handler prototype. (Follow i386 version.) 1999-04-20 22:53:54 +00:00
Peter Wemm
db42d90829 unifdef -DVM_STACK - it's been on for a while for x86 and was checked
and appeared to be working for the Alpha some time ago.
1999-04-19 14:14:14 +00:00
Bruce Evans
e7ba67f274 Removed all traces of `p_switchtime'. The relevant timestamp is per-cpu,
not per-process.  Keep it in `switchtime' consistently.

It is now clear that the timestamp is always valid in fork_trampoline()
except when the child is running on a previously idle cpu, which
can only happen if there are multiple cpus, so don't check or set
the timestamp in fork_trampoline except in the (i386) SMP case.
Just remove the alpha code for setting it unconditionally, since
there is no SMP case for alpha and the code had rotted.

Parts reviewed by:	dfr, phk
1999-02-28 10:53:29 +00:00
Matthew Dillon
dd2f9956e2 Adjust idle zero-page fill hysteresis based on tests. Use 2/3 and 4/5
zero-fill levels.

    Adjust comment for ozfod in vmmeter.h - this counter represents
    non-optimal ( on the fly ) zero fills, not prefills.
1999-02-08 02:42:13 +00:00
Matthew Dillon
d718be7be7 Add hysteresis to alpha version of vm_page_zero_idle(). 1999-02-08 00:47:32 +00:00
Matthew Dillon
faa273d5c2 Rip out PQ_ZERO queue. PQ_ZERO functionality is now combined in with
PQ_FREE.  There is little operational difference other then the kernel
    being a few kilobytes smaller and the code being more readable.

    * vm_page_select_free() has been *greatly* simplified.
    * The PQ_ZERO page queue and supporting structures have been removed
    * vm_page_zero_idle() revamped (see below)

    PG_ZERO setting and clearing has been migrated from vm_page_alloc()
    to vm_page_free[_zero]() and will eventually be guarenteed to remain
    tracked throughout a page's life ( if it isn't already ).

    When a page is freed, PG_ZERO pages are appended to the appropriate
    tailq in the PQ_FREE queue while non-PG_ZERO pages are prepended.
    When locating a new free page, PG_ZERO selection operates from within
    vm_page_list_find() ( get page from end of queue instead of beginning
    of queue ) and then only occurs in the nominal critical path case.  If
    the nominal case misses, both normal and zero-page allocation devolves
    into the same _vm_page_list_find() select code without any specific
    zero-page optimizations.

    Additionally, vm_page_zero_idle() has been revamped.  Hysteresis has been
    added and zero-page tracking adjusted to conform with the other changes.
    Currently hysteresis is set at 1/3 (lo) and 1/2 (hi) the number of free
    pages.  We may wish to increase both parameters as time permits.  The
    hysteresis is designed to avoid silly zeroing in borderline allocation/free
    situations.
1999-02-08 00:37:36 +00:00
Julian Elischer
2907af2a96 Mostly remove the VM_STACK OPTION.
This changes the definitions of a few items so that structures are the
same whether or not the option itself is enabled. This allows
people to enable and disable the option without recompilng the world.

As the author says:

|I ran into a problem pulling out the VM_STACK option.  I was aware of this
|when I first did the work, but then forgot about it.  The VM_STACK stuff
|has some code changes in the i386 branch.  There need to be corresponding
|changes in the alpha branch before it can come out completely.

what is done:
|
|1) Pull the VM_STACK option out of the header files it appears in.  This
|really shouldn't affect anything that executes with or without the rest
|of the VM_STACK patches.  The vm_map_entry will then always have one
|extra element (avail_ssize).  It just won't be used if the VM_STACK
|option is not turned on.
|
|I've also pulled the option out of vm_map.c.  This shouldn't harm anything,
|since the routines that are enabled as a result are not called unless
|the VM_STACK option is enabled elsewhere.
|
|2) Add what appears to be appropriate code the the alpha branch, still
|protected behind the VM_STACK switch.  I don't have an alpha machine,
|so we would need to get some testers with alpha machines to try it out.
|
|Once there is some testing, we can consider making the change permanent
|for both i386 and alpha.
|
[..]
|
|Once the alpha code is adequately tested, we can pull VM_STACK out
|everywhere.
|

Submitted by:	"Richard Seaman, Jr." <dick@tar.com>
1999-01-26 02:49:52 +00:00
Doug Rabson
9c0fed3dcf Various changes to support OSF1 emulation:
* Move the user stack from VM_MAXUSER_ADDRESS to a place below the 32bit
  boundary (needed to support 32bit OSF programs).  This should also save
  one pagetable per process.
* Add cvtqlsv to the set of instructions handled by the floating point
  software completion code.
* Disable all floating point exceptions by default.
* A minor change to execve to allow the OSF1 image activator to support
  dynamic loading.
1998-12-30 10:38:59 +00:00
Bruce Evans
4f2129fa86 Removed bogus casts of USRSTACK and/or the other operand in binary
expressions involving USRSTACK.
1998-12-16 15:21:51 +00:00
Doug Rabson
5b38fe900d Implement 'software completion' for floating point arithmetic. On the
alpha, operations involving non-finite numbers or denormalised numbers
or operations which should generate such numbers will cause an arithmetic
exception.  For programs which follow some strict code generation rules,
the kernel trap handler can then 'complete' the operation by emulating
the faulting instruction.

To use software completion, a program must be compiled with the arguments
'-mtrap-precision=i' and '-mfp-trap-mode=su' or '-mfp-trap-mode=sui'.
Programs compiled in this way can use non-finite and denormalised numbers
at the expense of slightly less efficient code generation of floating
point instructions.  Programs not compiled with these options will receive
a SIGFPE signal when non-finite or denormalised numbers are used or
generated.

Reviewed by: John Polstra <jdp@polstra.com>
1998-12-04 10:52:48 +00:00
Doug Rabson
08b6a4cbee * Add hooks to allow the X server to access I/O ports and memory.
* Update drivers to the latest version of the bus interface.

The ISA drivers' use of the new resource api is minimal.  Garrett has
some much cleaner drivers which should be more easily shared between
i386 and alpha.  This has only been tested on cia based machines.  It
should work on lca and apecs but I might have broken something.
1998-11-15 18:25:17 +00:00
Mike Smith
35d27a0f39 Add the ability to specify where on the at_shutdown queue a handler is
installed.

Remove cpu_power_down, and replace it with an entry at the end of the
SHUTDOWN_FINAL queue in the only place it's used (APM).

Submitted by:	Some ideas from Bruce Walter <walter@fortean.com>
1998-10-30 05:41:15 +00:00