CVS log for src/sys/arch/sparc/sparc/machdep.c

Up to [cvs.NetBSD.org] / src / sys / arch / sparc / sparc

Request diff between arbitrary revisions

Keyword substitution: kv
Default branch: MAIN

Move the at-shutdown call to resettodr() from cpu_reboot() to kern_reboot().

It's a small step, but it's a step.

Use vmem(9) rather than extent(9) to manage DVMA mappings.

s/functin/function/ in copy pasted comment.

Use the signal trampoline version constants from <sys/signal.h>.

fix multiplei repetitive typos in comments, messages and documentation. mainly because copy paste code big amount of files are affected.

Sync with HEAD.

avoid using 'extern <func|data>;' inside a .c file, but instead
use header files and ensure definitions are not duplicated or
are technically (if not in codegen) wrong.

Sync w/ HEAD.

malloc(9) -> kmem(9) (easy, straight-forward cases only, for now)

uvm_availmem(): give it a boolean argument to specify whether a recent
cached value will do, or if the very latest total must be fetched.  It can
be called thousands of times a second and fetching the totals impacts not
only the calling LWP but other CPUs doing unrelated activity in the VM
system.

Mostly merge changes from HEAD upto 20200411

Merge changes from current as of 20200406

Rename uvm_free() -> uvm_availmem().

uvmexp.free -> uvm_free()

in many device attach paths, allocate memory with M_WAITOK instead of M_NOWAIT
and remove code to handle failures that can no longer happen.

Sync with HEAD

Overhaul the API used to fetch and store individual memory cells in
userspace.  The old fetch(9) and store(9) APIs (fubyte(), fuword(),
subyte(), suword(), etc.) are retired and replaced with new ufetch(9)
and ustore(9) APIs that can return proper error codes, etc. and are
implemented consistently across all platforms.  The interrupt-safe
variants are no longer supported (and several of the existing attempts
at fuswintr(), etc. were buggy and not actually interrupt-safe).

Also augmement the ucas(9) API, making it consistently available on
all plaforms, supporting uniprocessor and multiprocessor systems, even
those that do not have CAS or LL/SC primitives.

Welcome to NetBSD 8.99.37.

- rework mm_md_readwrite() to avoid fallthrough warnings entirely

update from HEAD

Restore all work from the former pgoyette-localcount branch (which is
now abandoned doe to cvs merge botch).

The branch now builds, and installs via anita.  There are still some
problems (cgd is non-functional and all atf tests time-out) but they
will get resolved soon.

Sync with HEAD

Sync with HEAD.  (Note that most of these changes are simply $NetBSD$
tag issues.)

rearrange slightly to enable crash(8) to build.

Adapt the machine/arch dependent code to the new {b,c}devsw reference
counting.

XXX Most of these will require testing by someone other than myself, as
I have a limited selection of hardware!

Pull up following revision(s) (requested by maxv in ticket #195):
	sys/arch/arm/iomd/iomd_irqhandler.c: revision 1.21
	sys/arch/arm/ofw/ofw_irqhandler.c: revision 1.21
	sys/arch/atari/atari/intr.c: revision 1.24-1.25
	sys/arch/ews4800mips/sbd/fb_sbdio.c: revision 1.14
	sys/arch/hpcmips/tx/tx39icu.c: revision 1.34
	sys/arch/shark/isa/isa_irqhandler.c: revision 1.27
	sys/arch/sparc/sparc/machdep.c: revision 1.327
	sys/arch/sparc64/dev/psycho.c: revision 1.119
	sys/arch/sparc64/dev/schizo.c: revision 1.32
	sys/arch/sparc64/sparc64/machdep.c: revision 1.279
	sys/arch/sun68k/sun68k/bus.c: revision 1.22
	sys/arch/x86/x86/ipmi.c: revision 1.58
	sys/arch/xen/xen/privcmd.c: revision 1.46-1.49
Fix several memory leaks.

fix leak.

Rebase to HEAD as of a few days ago.

sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs.  ("Protocol error: too many arguments")

sync with head

G/C sys/simplelock.h includes

sync with (a bit old) head

Resync to 2012-11-19 00:00:00 UTC

Add RAS support for sparc.

sync with head

Adapt for _UC_TLSBASE addition

Move cn_tab initialization to bootstrap()

move cn_tab initializationt to cpu_startup

Remove declartions of physmem

Remove safepri and use IPL_SAFEPRI instead.  This may be defined in a MD
header file (if not, a value of 0 is assmued).

sync to latest -current.

sync with head.

Pull up following revision(s) (requested by martin in ticket #274):
	sys/arch/amd64/amd64/process_machdep.c: revision 1.20
	sys/kern/sys_lwp.c: revision 1.54
	sys/arch/sparc64/sparc64/machdep.c: revision 1.267
	sys/arch/mips/mips/cpu_subr.c: revision 1.16
	sys/arch/vax/vax/machdep.c: revision 1.188
	sys/sys/lwp.h: revision 1.161
	sys/arch/sparc64/sparc64/netbsd32_machdep.c: revision 1.98
	sys/arch/alpha/alpha/machdep.c: revision 1.339
	sys/compat/sys/ucontext.h: revision 1.6
	sys/arch/hppa/hppa/hppa_machdep.c: revision 1.28
	distrib/sets/lists/tests/mi: revision 1.469
	sys/arch/powerpc/powerpc/sig_machdep.c: revision 1.42
	tests/lib/libc/sys/t_lwp_create.c: revision 1.1
	tests/lib/libc/sys/Makefile: revision 1.23
	sys/arch/arm/arm/sig_machdep.c: revision 1.42
	sys/arch/amd64/include/mcontext.h: revision 1.15
	sys/arch/amd64/amd64/machdep.c: revision 1.183
	sys/arch/sh3/sh3/sh3_machdep.c: revision 1.99
	sys/arch/i386/i386/machdep.c: revision 1.727
	sys/compat/netbsd32/netbsd32_lwp.c: revision 1.13
	sys/arch/sparc/sparc/machdep.c: revision 1.319
	sys/arch/amd64/amd64/netbsd32_machdep.c: revision 1.76
	sys/arch/m68k/m68k/sig_machdep.c: revision 1.49
	sys/sys/ucontext.h: revision 1.16
	sys/arch/mips/mips/netbsd32_machdep.c: revision 1.9
	lib/libc/sys/_lwp_create.2: revision 1.5
Calling _lwp_create() with a bogus ucontext could trigger a kernel
assertion failure (and thus a crash in DIAGNOSTIC kernels). Independently
discovered by YAMAMOTO Takashi and Joel Sing.
To avoid this, introduce a cpu_mcontext_validate() function and move all
sanity checks from cpu_setmcontext() there. Also untangle the netbsd32
compat mess slightly and add a cpu_mcontext32_validate() cousin there.
Add an exhaustive atf test case, based partly on code from Joel Sing.
Should finally fix the remaining open part of PR kern/43903.

Calling _lwp_create() with a bogus ucontext could trigger a kernel
assertion failure (and thus a crash in DIAGNOSTIC kernels). Independently
discovered by YAMAMOTO Takashi and Joel Sing.

To avoid this, introduce a cpu_mcontext_validate() function and move all
sanity checks from cpu_setmcontext() there. Also untangle the netbsd32
compat mess slightly and add a cpu_mcontext32_validate() cousin there.

Add an exhaustive atf test case, based partly on code from Joel Sing.

Should finally fix the remaining open part of PR kern/43903.

sync to latest -current.

Fix totally uncompilable code. PR 46374 from Henning Petersen.

sync with head

sync to -current.

Remove COMPAT_SA / KERN_SA.  Welcome to 6.99.3!
Approved by core@.

merge to -current.

Change old-style function defintions to C89 prototypes.

Approved by releng.

converting extent(9) from malloc(9) to kmem(9)
preceding kmem-vmem-pool-uvm patch

releng@ acknowledged

implement bdev_size(9) wrapper around d_psize() routine, so we can take
the device lock in relevant places.  avoid doing so while actually dumping.

tested i386 crash dumps still work, and that all touched files compile.

fixes PR#45705.

Switch sparc and sparc64 to new-style <sys/bus.h>.

don't try to print fr_arg[6] since it doesn't exist.

Catchup with rmind-uvmplock merge.

Welcome to 5.99.53!  Merge rmind-uvmplock branch:

- Reorganize locking in UVM and provide extra serialisation for pmap(9).
  New lock order: [vmpage-owner-lock] -> pmap-lock.

- Simplify locking in some pmap(9) modules by removing P->V locking.

- Use lock object on vmobjlock (and thus vnode_t::v_interlock) to share
  the locks amongst UVM objects where necessary (tmpfs, layerfs, unionfs).

- Rewrite and optimise x86 TLB shootdown code, make it simpler and cleaner.
  Add TLBSTATS option for x86 to collect statistics about TLB shootdowns.

- Unify /dev/mem et al in MI code and provide required locking (removes
  kernel-lock on some ports).  Also, avoid cache-aliasing issues.

Thanks to Andrew Doran and Joerg Sonnenberger, as their initial patches
formed the core changes of this branch.

sync with head

Sync with HEAD.

Revert maxdmap/maxsmap constification, as it causes problems on some
sparc models.  Reported by tsutsui@.

sync with head

Hack-around sparc/sun4c case, which modifies const maxdmap/maxsmap.
From he@.  OK mrg@.

sync with head

Replace malloc with kmem, and remove M_SUBPROC.

Apply patches (requested by mrg in ticket #1564):
	sys/arch/sparc/dev/zs.c:		patch
	sys/arch/sparc/include/cpu.h:		patch
	sys/arch/sparc/include/z8530var.h:	patch
	sys/arch/sparc/sparc/cpu.c:		patch
	sys/arch/sparc/sparc/cpuvar.h:		patch
	sys/arch/sparc/sparc/db_interface.c:	patch
	sys/arch/sparc/sparc/genassym.cf:	patch
	sys/arch/sparc/sparc/intr.c:		patch
	sys/arch/sparc/sparc/locore.s:		patch
	sys/arch/sparc/sparc/machdep.c:		patch
	sys/arch/sparc/sparc/timer.c:		patch
	sys/arch/sparc/sparc/timer_sun4m.c:	patch
	sys/arch/sparc/sparc/timervar.h:	patch
	sys/arch/sparc/sparc/trap.c:		patch
	sys/arch/sparc/sparc/vm_machdep.c:	patch

- fix a panic in savefpstate.  idea, and code suggestions from uwe
- convert xpmsg_lock to IPL_SCHED.  the old spl/simple_lock code ran at
  splsched(), and this significantly helps with stability under load when
  running with multiple active CPUs
- in strayintr() don't print about stray zs inters in MP case
- fix a deadlock in xcall()
- consolidate the interrupt evcnt(9) into a full set of per-IPL per-CPU
  soft/hard counters
- fix xcall() failure messages in some cases
- addd new ddb command "mach xcall"
- use schedintr() (not schedintr_4m()) on MP or single CPU configurations
- call hardclock() the same way on cpu0 in MP and !MP cases
- request the appropriate stack space for nmi_sun4m, in particular,
  make sure we have space for %g2...%g5.  now entering ddb via eg,
  serial break no longer causes cpu1 to fault.
- give memfault_sun*() some entry points that both gdb and ddb will find.
from tsutsui:
- fix panic in interrupt handlers in zs

sync with head

Sync with HEAD

Refactor ps_strings access. Based on PK_32, write either the normal
version or the 32bit compat layout in execve1. Introduce a new function
copyin_psstrings for reading it back from userland and converting it to
the native layout. Refactor procfs to share most of the code with the
kern.proc_args sysctl handler.

This material is based upon work partially supported by
The NetBSD Foundation under a contract with Joerg Sonnenberger.

Allow storing and receiving the LWP private pointer via ucontext_t
on all platforms except VAX and IA64. Add fast access via register for
AMD64, i386 and SH3 ports. Use this fast access in libpthread to replace
the stack based pthread_self(). Implement skeleton support for Alpha,
HPPA, PowerPC, SPARC and SPARC64, but leave it disabled.

Ports that support this feature provide __HAVE____LWP_GETPRIVATE_FAST in
machine/types.h and a corresponding __lwp_getprivate_fast in
machine/mcontext.h.

This material is based upon work partially supported by
The NetBSD Foundation under a contract with Joerg Sonnenberger.

Retire struct user, remove sys/user.h inclusions.  Note sys/user.h header
as obsolete.  Remove USER_TO_UAREA/UAREA_TO_USER macros.

Various #include fixes and review by matt@.

introduce a hack to workaround the savefpstate IPI get's NULL
struct fpstate *.

add a new entry point ipi_savefpstate() that is used for this IPI
instead of the plain ipi_savefpstate().  check for %o0 being NULL,
and if so, just return.

add event counters for the savefpstate IPI, and another one for
when it detects the NULL problem.

make the cpu_info struct xmpsg be aligned to a single cache line.

with this change applied (and another minor change in testing) my
SS20 with dual SM75's has survived for 17 hours on build.sh -j5,
and has reported 7 NULL savefps.  (the minor change seems to have
a significant effect at reducing this number, but more testing is
needed for it.)


XXX:  this is horrible and we really need to find the real problem
XXX:  but this should let people use sparc smp again, and fixes
XXX:  for the real problem can be tested by seeing if any of the
XXX:  savefp IPI null counter becomes non-zero.

Move counting of faults, traps, intrs, soft[intr]s, syscalls, and nswtch
from uvmexp to per-cpu cpu_data and move them to 64bits.  Remove unneeded
includes of <uvm/uvm_extern.h> and/or <uvm/uvm.h>.

Sync with HEAD.

A round of compile and other fixes to previous.

- Invent mm_md_getva() and mm_md_relva() routines, provided by MD and
  indicated with __HAVE_MM_MD_PREFER_VA.  It will be used to deal with
  cache aliasing issues and thus fix little MIPS, ARM and friends.

- Convert dev_mem_readwrite() to use unmanaged mappings.  Fix a missed
  offset addition in a case of direct map.  Sprinkle various comments in
  the memory device driver.

- Add missing direct map handling on hp700 and vax.  Make checks across
  m68k ports more consistent, reduce the diffs.  Fix kernacc check miss
  on news68k.  Minor off-by-one fix for alpha.  Add MEMC_PHYS_BASE for
  mmap() case check on acorn26.  Misc clean-up.

sync to netbsd-5

Unify /dev/{mem,kmem,zero,null} implementations in MI code.  Based on patch
from Joerg Sonnenberger, proposed on tech-kern@, in February 2008.

Work and depression still in progress.

sync with head

Remove separate mb_map. The nmbclusters is computed at boot time based
on the amount of physical memory and limited by NMBCLUSTERS if present.
Architectures without direct mapping also limit it based on the kmem_map
size, which is used as backing store. On i386 and ARM, the maximum KVA
used for mbuf clusters is limited to 64MB by default.

The old default limits and limits based on GATEWAY have been removed.
key_registered_sb_max is hard-wired to a value derived from 2048
clusters.

convert fpulock into fpu_mtx.

add an explicit "bool mpsafe" to intr_establish().  only set it to true
for the sun4m timer/counter interrupts.  this gets lev10/14 working again
on SMP systems, where those interrupts started taking the kernel lock and
hanging...

Change u_long to vaddr_t/vsize_t in exec code where appropriate (mostly
involves setregs and vmcmds).  Should result in no code differences.

Kill proc0paddr.  Use lwp0.l_addr instead.

Use lwp_getpcb() on sparc{64} and sun2/3 MD code, clean from struct user usage.

Add a flags argument to pmap_kenter_pa(9).
Patch showed on tech-kern@ http://mail-index.netbsd.org/tech-kern/2009/11/04/msg006434.html
No objections.

Back out ticket 969

Pull up following revision(s) (requested by macallan in ticket #969):
	sys/arch/sparc/include/bus.h: revision 1.56
	sys/arch/sparc/sparc/machdep.c: revision 1.294
do as phone suggested - remove sparc_bus_map_large() again and use a =20=
flag
instead ( BUS_SPACE_MAP_LARGE )

sync with head.

Include <sys/exec_aout.h> explicitly instead of relying on <sys/exec.h> to
do it for us.

sync with head

do as phone suggested - remove sparc_bus_map_large() again and use a flag
instead ( BUS_SPACE_MAP_LARGE )

KNF, same object code generated.

Sync with HEAD.

Commit is split, to avoid a "too many arguments" protocol error.

sync with head.

Sync with HEAD.

Add sparc_bus_map_large() to map large bus ranges like framebuffers and
apertures outside the IODEV range. ZX for example needs 8MB for the framebuffer
alone while the IODEV range provides only 16MB.

bcopy -> memcpy

bzero -> memset

Sync with HEAD.

Use "defopt MODULAR" in sys/conf/files, and #include "opt_modular.h"
in all kernel sources that use the MODULAR option.
Proposed in tech-kern on 18 Jan 2009.

Pull up following revision(s) (requested by ad in ticket #346):
	sys/arch/alpha/alpha/machdep.c: revision 1.311
	sys/arch/amiga/amiga/machdep.c: revision 1.211
	sys/arch/atari/atari/machdep.c: revision 1.153
	sys/arch/hp700/hp700/machdep.c: revision 1.53
	sys/arch/i386/i386/dumpsys.c: revision 1.5
	sys/arch/mips/mips/mips_machdep.c: revision 1.206
	sys/arch/mvme68k/mvme68k/machdep.c: revision 1.132
	sys/arch/news68k/news68k/machdep.c: revision 1.75
	sys/arch/next68k/next68k/machdep.c: revision 1.88
	sys/arch/sparc/sparc/machdep.c: revision 1.285
	sys/arch/sparc64/sparc64/machdep.c: revision 1.230
	sys/arch/sun2/sun2/machdep.c: revision 1.56
	sys/arch/sun3/sun3/machdep.c: revision 1.188
	sys/arch/sun3/sun3x/machdep.c: revision 1.114
	sys/arch/x68k/x68k/machdep.c: revision 1.153
dumpsys: don't spew numbers into the log.

Re-adapt to the changed return types for major() and minor().

Sync with HEAD.

Sync with HEAD.

use PRIu64 format to printf major() and minor() values

add an empty module_init_md(), allows a MODULAR kernel to link.

Update haad-dm branch to haad-dm-base2.

dumpsys: don't spew numbers into the log.

Make the emulations, exec formats, coredump, NFS, and the NFS server
into modules. By and large this commit:

- shuffles header files and ifdefs
- splits code out where necessary to be modular
- adds module glue for each of the components
- adds/replaces hooks for things that can be installed at runtime

It is not appropriate to call pmf_system_shutdown(9) from
doshutdownhooks(9): shutdown hooks registered by shutdownhook_establish(9)
expect to be called with interrupts disabled, but shutdown hooks
registered with pmf_device_register1(9) expect to be called with
interrupts enabled.  So I have made two changes:

1 Do not call pmf_system_shutdown() from doshutdownhooks().  Instead,
change every call to doshutdownhooks() to a call to doshutdownhooks()
followed by a call to pmf_system_shutdown().  No functional change
is intended by this change.

2 Make i386 re-enable interrupts briefly while it calls
pmf_system_shutdown().  I leave it to others either to fix the
other ports, or to factor out some MI shutdown code, as joerg@
suggests, and fix that.  Note that a functional change *is* intended
by this change.

I hope that this patch will stop us from flip-flopping between
calling doshutdownhooks() and pmf_system_shutdown() sometimes with
and sometimes without interrupts enabled.

Sync with HEAD.

Add misissing include and fix a few typos.

Merge wrstuden-revivesa into HEAD.

Sync with wrstuden-revivesa-base-2.

Sync with head.

Sync with HEAD.

Replce exec_map with a pool. Proposed on tech-kern@, reviewed by chs@.

Sync w/ -current. 34 merge conflicts to follow.

Re-add cpu_upcall() and page fault code. i386 kernels now compile.
They don't boot, but that seems to be a consequence of current from the
day this branch was started.

sync with head.

Sync with HEAD.

Also fix build.

vm_page: put TAILQ_ENTRY into a union with LIST_ENTRY, so we can use both.

Sync with HEAD.

sync with head.

sync with head.

Per discussion with ad at n dot o, revert signal mask handling
changes.

The l_sigstk changes are most likely totally un-needed as SA will
never use a signal stack - we send an upcall (or will as other
diffs are brought in).

The l_sigmask changes were too controvertial. In all honesty, I
think it's probably best to revert them. The main reason they were
there is the fact that in an SA process, we don't mask signals per
kernel thread, we mask them per user thread. In the kernel, we want
them all to get turned into upcalls. Thus the normal state of
l_sigmask in an SA process is for it to always be empty.

While we are in the process of delivering a signal, we want to
temporarily mask a signal (so we don't recursively exhaust our
upcall stacks). However signal delivery is rare (important, but
rare), and delivering back-to-back signals is even rarer. So rather
than cause every user of a signal mask to be prepared for this very
rare case, we will just add a second check later in the signal
delivery code. Said change is not in this diff.

This also un-compensates all of our compatability code for dealing
with SA. SA is a NetBSD-specific thing, so there's no need for
Irix, Linux, Solaris, SVR4 and so on to cope with it.

As previously, everything other than kern_sa.c compiles in i386
GENERIC as of this checkin. I will switch to ALL soon for compile
testing.

Per discussion with ad, remove most of the #include <sys/sa.h> lines
as they were including sa.h just for the type(s) needed for syscallargs.h.

Instead, create a new file, sys/satypes.h, which contains just the
types needed for syscallargs.h. Yes, there's only one now, but that
may change and it's probably more likely to change if it'd be difficult
to handle. :-)

Per discussion with matt at n dot o, add an include of satypes.h to
sigtypes.h. Upcall handlers are kinda signal handlers, and signalling
is the header file that's already included for syscallargs.h that
closest matches SA.

This shaves about 3000 lines off of the diff of the branch relative
to the base. That also represents about 18% of the total before this
checkin.

I think this reduction is very good thing.

Initial checkin of re-adding SA. Everything except kern_sa.c
compiles in GENERIC for i386. This is still a work-in-progress, but
this checkin covers most of the mechanical work (changing signalling
to be able to accomidate SA's process-wide signalling and re-adding
includes of sys/sa.h and savar.h). Subsequent changes will be much
more interesting.

Also, kern_sa.c has received partial cleanup. There's still more
to do, though.

Remove clause 3 and 4 from TNF licenses

Merge proc::p_mutex and proc::p_smutex into a single adaptive mutex, since
we no longer need to guard against access from hardware interrupt handlers.

Additionally, if cloning a process with CLONE_SIGHAND, arrange to have the
child process share the parent's lock so that signal state may be kept in
sync. Partially addresses PR kern/37437.

Sync with HEAD.

sync with head

sync with HEAD

Sync with HEAD

Add missing include.

Sync with HEAD

Sync with head.

Convert all the system call entry points from:
    int foo(struct lwp *l, void *v, register_t *retval)
to:
    int foo(struct lwp *l, const struct foo_args *uap, register_t *retval)
Fixup compat code to not write into 'uap' and (in some cases) to actually
pass a correctly formatted 'uap' structure with the right name to the
next routine.
A few 'compat' routines that just call standard ones have been deleted.
All the 'compat' code compiles (along with the kernels required to test
build it).
98% done by automated scripts.

sync with HEAD

Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree.  Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches.  The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

Sync with HEAD

sync with head.

Sync with head.

Sync with head.

Initialize the link context in a signal frame to the receiving lwp's
link context instead of NULL.  Otherwise, if we got a signal while the
lwp had a link context set, the link context would be set to NULL upon
return from signal delivery.

christos@tech-kern: "I think you are right."

Sync with head.

Update to HEAD.

merge yamt-idlelwp branch.  asked by core@.  some ports still needs work.

from doc/BRANCHES:

	idle lwp, and some changes depending on it.

	1. separate context switching and thread scheduling.
	   (cf. gmcgarry_ctxsw)
	2. implement idle lwp.
	3. clean up related MD/MI interfaces.
	4. make scheduler(s) modular.

port yamt-idlelwp to sparc.  this does not work yet, but others have
asked that i commit this work-in-progress.

currently kernel threads end up running with PSR_S missing from %psr
and end up failing to dump a user corefile.

Sync with HEAD.

fix fall out from caddr_t changes.

make this compile again

Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

- sync with head.
- move sched_changepri back to kern_synch.c as it doesn't know PPQ anymore.

sync with head.

TRUE -> true, FALSE -> false

Merge newlock2 to head.

Sync with head.

Remove support for SA. Ok core@.

Pull up following revision(s) (requested by jdc in ticket #372):
	sys/arch/sparc/sparc/machdep.c: revision 1.266
Allow SUN4 class machines to boot again by making process virtual
addresses avoid the MMU "hole", as is done on SUN4C class machines.

Apply the same UBC, data and stack limits that are applied to SUN4C to
SUN4 as well.

The data and stack limits are definitely needed, otherwise MI code will try
and map shared libraries in the 4/4c MMU hole.  The UBC limits may not be
necessary, but SUN4 machines are unlikely to have much larger amounts of
memory than this caters for (64Mb).

SUN4 machines will now boot userland with this change.

Thanks to martin@, mrg@ and uwe@ for hints while debugging this.

sparc MD changes.

sync with head.

sync with head.

Sync with head.

Propagate const, prompted by new gcc.

sync with head.

sync with head

Convert both sparc and sparc64 to MI todr.

Apply patch (requested by fair in ticket #1401):
Avoid panic in memory management on some SPARC systems with QFE cards.
This fixes PR port-sparc/33340 and  PR port-sparc/33894.

Apply patch (requested by fair in ticket #1401):
Avoid panic in memory management on some SPARC systems with QFE cards.
This fixes PR port-sparc/33340 and  PR port-sparc/33894.

sync with head.

merge ktrace-lwp.

Sync with head.

sync with head.

bus_dmamem_map: honour BUS_DMA_NOWAIT.  noted by Manuel Bouyer.
bus_space_map: always do NOWAIT allocation as it used to be before yamt-km.

we have too many copies!

sync with head.

Use uint<N>_t.  Drop trailing whitespace.

file machdep.c was added on branch yamt-readahead on 2005-11-22 16:08:03 +0000

ANSIify.  Same binary code is produced for GENERIC.MP + KGDB + DDB.

Sync with HEAD. Here we go again...

sync with head.

Move md_flags back to mdproc.  MDP_FIXALIGN, the only flag we have, is
per-process, not per-lwp.  We don't have per-lwp flags currently.

We need <compat/sys/signal.h> and <compat/sys/signalvar.h> here
for native_sigset13_to_sigset, sigset13_t, and sigvec.
The includes in sparc's machdep.c is conditional on COMPAT_13, as is
the use of native_sigset13_to_sigset.

Rename 'ncpus' to 'sparc_ncpus' to avoid shadow warnings in m.i. code.
Also sprinkle an __UNVOLATILE() for sparc.
n.b. sparc64 'cpus' should probably be renamed to 'cpu_info_list' to
     match i386 et al.

Rename ncpu to ncpus (as other ports call it), to avoid shadow warnings.
Sprinkle some const.

sync with -current

Move the MI printing of `copyright' to the MD cpu_startup() code
where the printing of `version' is already performed.
This has the benefit of allowing the copyright to be available
via dmesg(8) on platforms which need the `msgbuf' to be setup
in cpu_startup() before printed output is remembered.

Sync with HEAD.

merge yamt-km branch.
- don't use managed mappings/backing objects for wired memory allocations.
  save some resources like pv_entry.  also fix (most of) PR/27030.
- simplify kernel memory management API.
- simplify pmap bootstrap of some ports.
- some related cleanups.

Pull up revision 1.252 (requested by chs in ticket #1160):
define a new LWP flag which indicates that we're in the process of
doing a context switch.  use this on sparc and sparc64 to avoid trying
to access user memory (writing the register windows back to the stack)
in this case (since it's both unnecessary and wrong).

Pull up revision 1.252 (requested by chs in ticket #1160):
define a new LWP flag which indicates that we're in the process of
doing a context switch.  use this on sparc and sparc64 to avoid trying
to access user memory (writing the register windows back to the stack)
in this case (since it's both unnecessary and wrong).

sync with head.  xen and whitespace.  xen part is not finished.

Add a dm_maxsegsz public member to bus_dmamap_t.  This allows a user of the API
to select the maximum segment size for each bus_dmamap_load (up to the maxsegsz
supplied to bus_dmamap_create).  dm_maxsegsz is reset to the value supplied to
bus_dmamap_create when the dmamap is unloaded.

sync with head.

- use new apis.
- don't leave page mapped at kva being freed.

Sync with HEAD.

define a new LWP flag which indicates that we're in the process of
doing a context switch.  use this on sparc and sparc64 to avoid trying
to access user memory (writing the register windows back to the stack)
in this case (since it's both unnecessary and wrong).

Fix the sync with head I botched.

Sync with HEAD.

Sync with HEAD

Introduce bus_space_tag_alloc() for the common parts of bus tag allocation.

Rename bus_translate_address_generic => bus_space_translate_address_generic()
and move prototype to <machine/bus.h>.

Always use `full bus space'. In order to implement this more efficiently,
require that all bus tags have pointers to bus_space_read/write functions,
i.e. no run-time hunting for the first "upstream" implementation.
Since this changes the way bus tags should be constructed it makes sense
to do the same thing for the rest of the bus space methods.
So, now bus space tags are generally constructed by copying the parent's bus
tag and then overriding the methods that the bus driver needs to handle,
instead of starting with an empty bus tag and fiiling in only the fields needed.

Pullup rev 1.248 (requested by pk in ticket #211)

Changes to fix and help diagnose MMU resource shortage on small sun4c systems

Limit buffer cache VM to prevent too many locked `PMEGs' on small sun4c
systems.

Remove private declarations of maxdmap and maxsmap.

On sun4c, clip max data & stack size to avoid the MMU hole.

Tango on sysctl_createv() and flags.  The flags have all been renamed,
and sysctl_createv() now uses more arguments.

Enable reset of a process's alternative signal stack flag.

When powering down, first ask the PROM to do it for us.

Replace the traditional buffer memory management -- based on fixed per buffer
virtual memory reservation and a private pool of memory pages -- by a scheme
based on memory pools.

This allows better utilization of memory because buffers can now be allocated
with a granularity finer than the system's native page size (useful for
filesystems with e.g. 1k or 2k fragment sizes).  It also avoids fragmentation
of virtual to physical memory mappings (due to the former fixed virtual
address reservation) resulting in better utilization of MMU resources on some
platforms.  Finally, the scheme is more flexible by allowing run-time decisions
on the amount of memory to be used for buffers.

On the other hand, the effectiveness of the LRU queue for buffer recycling
may be somewhat reduced compared to the traditional method since, due to the
nature of the pool based memory allocation, the actual least recently used
buffer may release its memory to a pool different from the one needed by a
newly allocated buffer. However, this effect will kick in only if the
system is under memory pressure.

Dynamic sysctl.

Gone are the old kern_sysctl(), cpu_sysctl(), hw_sysctl(),
vfs_sysctl(), etc, routines, along with sysctl_int() et al.  Now all
nodes are registered with the tree, and nodes can be added (or
removed) easily, and I/O to and from the tree is handled generically.

Since the nodes are registered with the tree, the mapping from name to
number (and back again) can now be discovered, instead of having to be
hard coded.  Adding new nodes to the tree is likewise much simpler --
the new infrastructure handles almost all the work for simple types,
and just about anything else can be done with a small helper function.

All existing nodes are where they were before (numerically speaking),
so all existing consumers of sysctl information should notice no
difference.

PS - I'm sorry, but there's a distinct lack of documentation at the
moment.  I'm working on sysctl(3/8/9) right now, and I promise to
watch out for buses.

uninitialized variables.

Pullup via patch (requested by pk in ticket #1535)
On small sun4c machines trim the buffer cache to reduce the demand for
 kernel virtual memory. This leaves more of the precious PMEG resources
 available for user space VM which speeds up things considerably, since
 a reasonable PMEG working set can be maintained.

Don't use NULL in integer-type assignments/comparisons.

sendsig: we must copy out the `ksi_info' field.

sendsig: don't copy out the ucontext_t padding bytes onto the user stack.

Simplify struct sigframe.

* Shuffle some data structures so, and add a flags word to ksiginfo_t.
  Right now the only flag is used to indicate if a ksiginfo_t is a
  result of a trap.  Add a predicate macro to test for this flag.
* Add initialization macros for ksiginfo_t's.
* Add accssor macro for ksi_trap.  Expands to 0 if the ksiginfo_t was
  not the result of a trap.  This matches the sigcontext trapcode semantics.
* In kpsendsig(), use KSI_TRAP_P() to select the lwp that gets the signal.
  Inspired by Matthias Drochner's fix to kpsendsig(), but correctly handles
  the case of non-trap-generated signals that have a > 0 si_code.

This patch fixes a signal delivery problem with threaded programs noted by
Matthias Drochner on tech-kern.

As discussed on tech-kern.  Reviewed and OK's by Christos.

sparc kernel support for SA_SIGINFO.

Fix "constify sendsig/trapsignal" fallout for non-siginfo'd archs.  Test
compiled on most architectures.

change PROM_getprop() from taking a "void **" for the storage, to a
"void *", and do the extra de-reference directly in the function.  this
avoids having to cast dozens of different types to "void **", which sets
of GCC3's strict-aliasing.  testing by martin@

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

On small sun4c machines trim the buffer cache to reduce the demand for
kernel virtual memory. This leaves more of the precious PMEG resources
available for user space VM which speeds up things considerably, since
a reasonable PMEG working set can be maintained.

__KERNEL_RCSID()

Apply the aborted ktrace-lwp changes to a specific branch.  This is just for
others to review, I'm concerned that patch fuziness may have resulted in some
errant code being generated but I'll look at that later by comparing the diff
from the base to the branch with the file I attempt to apply to it.  This will,
at the very least, put the changes in a better context for others to review
them and attempt to tinker with removing passing of 'struct lwp' through
the kernel.

Back out the lwp/ktrace changes. They contained a lot of colateral damage,
and need to be examined and discussed more.

More changes for providing lwpid for ktrace (sparc GENERIC built)

Pass lwp pointers throughtout the kernel, as required, so that the lwpid can
be inserted into ktrace records.  The general change has been to replace
"struct proc *" with "struct lwp *" in various function prototypes, pass
the lwp through and use l_proc to get the process pointer when needed.

Bump the kernel rev up to 1.6V

Make sure to include opt_foo.h if a defflag option FOO is used.

DMA, not dma nor Dma.

Use PAGE_SIZE rather than NBPG.

Merge the nathanw_sa branch.

Sync with HEAD.

Some PROMs get really uneasy if the prom_reboot() function is called
after the other CPUs have already return into the PROM through prom_cpustop().
So don't do it; try to halt the other CPUs only when an actual `halt'
is requested.

My guess in this case is that the PROM does not expect its original boot
CPU to call prom_cpustop(0), or possibly treats it as the equivalent of
a prom_halt() which is then called again by some other CPU. In any case,
the result is garbage.

Fix reboot options handling; now one-letter kernel names can also be booted.

Sync with HEAD.

Remove UNLOCK_XPMSG() before cpu_halt(); it's not compatible with LOCKDEBUG
and it wan't chique in any case.

remove cpu_hatched, cpu_hatch_sc and cpu_hatchstack.  the first can use
the cpi->flags, the second is unused and the third is also cpi-idle_u.

Halt any other CPUs in cpu_reboot().

fpulock: encapsulate required IPL raise in the FPU LOCK/UNLOCK macros.

call splclock() around the FPU_LOCK().

XXX: pk suggests we can make the this a sleeping lock.

Catch up to -current.

Protect FPU context switching with its own lock.

Correction from uwe: Reserve a C call frame on the stack, not a
register window.

Remove the upcall trampoline, and invoke the upcall directly.  Also,
there is no need to fiddle with register windows here, nor to save the
arguments to the stack.

Reviewed by uwe.

Sync with HEAD (again).

Define a few XCALL? shorthand macros to avoid clutter.

Finish FPU context switching on SMP systems.

part one of bus_space(9) fixes to enable bus spaces to override the
bus_space_{read,write}_[1248]() functions, which will allow 16-bit
PCMCIA support to work without additional hacks in MI drivers.
this option is not enabled yet.

Adjust for mcontext changes.

Sync with HEAD.

The cache flush routines now take a CPU context parameter. This is going
to be necessary in SMP kernels.

dumpsys(): Use pmap_kremove() to unmap pages mapped pmap_kenter().

Sync with HEAD.

Remove the `flags' argument from bus_intr_establish().

bus_intr_establish() now takes an optional `fast trap' handler argument.
BUS_INTR_ESTABLISH_FASTTRAP and BUS_INTR_ESTABLISH_SOFTINTR are no longer used.

Pass the `device class interrupt level' on to intr_establish() and use to
raise the ipl in the interrupt handlers to the appropriate level. This avoids
interrupt handler interference if one of the devices actually interrupts at
a lower hardware level than the maximum level assined to a device class.

Based on code from Art Grabowski in openbsd.

Not all sun4m platforms have version 8 sparc CPUs. So go out to the PROM
and get the CPU architecture version from the PROM cpu node `sparc-version'
property.

Make upcalls work.  sa2 passes now.
sa3 seems to work but hangs after printing "About to exit."

Add `machdep.cpu_arch' sysctl to determine the CPU architecture version.
Currrently, cpu types `sun4' and `sun4c' produce version 7, all others
version 8.

Catch up to -current.

sync kqueue with -current; this includes merge of gehenna-devsw branch,
merge of i386 MP branch, and part of autoconf rototil work

Don't include <sys/map.h>.

Do not include <sys/clist.h>, it's not used in NetBSD at all.

Catch up to -current.

Merge the gehenna-devsw branch into the trunk.

This merge changes the device switch tables from static array to
dynamically generated by config(8).

- All device switches is defined as a constant structure in device drivers.

- The new grammer ``device-major'' is introduced to ``files''.

	device-major <prefix> char <num> [block <num>] [<rules>]

- All device major numbers must be listed up in port dependent majors.<arch>
  by using this grammer.

- Added the new naming convention.
  The name of the device switch must be <prefix>_[bc]devsw for auto-generation
  of device switch tables.

- The backward compatibility of loading block/character device
  switch by LKM framework is broken. This is necessary to convert
  from block/character device major to device name in runtime and vice versa.

- The restriction to assign device major by LKM is completely removed.
  We don't need to reserve LKM entries for dynamic loading of device switch.

- In compile time, device major numbers list is packed into the kernel and
  the LKM framework will refer it to assign device major number dynamically.

sync kqueue branch with HEAD

catch up with -current.

catch up with -current.

Fix missing error check in sparc_bus_map().  Pointed out by uwe.

Catch up to -current.

Make nbuf, nswbuf, and bufpages unsigned.  Make all operations on these
variables unsigned, and update places where their values are printed.

Put a bus's ranges in the bus space tag, and make sparc_bus_map()
perform the translation and recursion if t->ranges != NULL.  Make
sbus, cpuunit, and bootbus inherit the parent's map/mmap routines,
and delete the now-unused mapping functions.  Update all places where
bus space tags are statically allocated.

LWPify sigexit() call.

Catch up to -current.

catch up with -current.

More sun4m/sun4d common stuff.

Remote CPU_ISSUN4OR4C and CPU_ISSUN4COR4M, and instead express them
as (CPU_ISSUN4 || CPU_ISSUN4C) and (CPU_ISSUN4C || CPU_ISSUN4M),
respectively.  The compiler can still optimize as desired by expressing
them this way, and it simplifies adding new tests.

While here, just remove CPU_ISSUN4MOR4U; it's not used by anything.

catch up with -current.

catch up with -current.

No longer need to pull in lwp.h; proc.h pulls it in for us.

Add kernel support for having userland provide the signal trampoline:

* struct sigacts gets a new sigact_sigdesc structure, which has the
  sigaction and the trampoline/version.  Version 0 means "legacy kernel
  provided trampoline".  Other versions are coordinated with machine-
  dependent code in libc.
* sigaction1() grows two more arguments -- the trampoline pointer and
  the trampoline version.
* A new __sigaction_sigtramp() system call is provided to register a
  trampoline along with a signal handler.
* The handler is no longer passed to sensig() functions.  Instead,
  sendsig() looks up the handler by peeking in the sigacts for the
  process getting the signal (since it has to look in there for the
  trampoline anyway).
* Native sendsig() functions now select the appropriate trampoline and
  its arguments based on the trampoline version in the sigacts.

Changes to libc to use the new facility will be checked in later.  Kernel
version not bumped; we will ride the 1.6C bump made recently.

Curproc->curlwp renaming.

Change uses of "curproc->l_proc" back to "curproc", which is more like the
original use. Bare uses of "curproc" are now "curlwp".

"curproc" is now #defined in proc.h as ((curlwp) ? (curlwp)->l_proc) : NULL)
so that it is always safe to reference curproc (*de*referencing curproc
is another story, but that's always been true).

catch up with -current on kqueue branch

Pull in appropriate headers; LWPify some more

Catch up to -current.

move initialization of the "struct pglist" returned by uvm_pglistalloc()
from the calling code into uvm_pglistalloc() itself for consistency
and easier error handling

#include <sys/sa.h> before <sys/syscallargs.h>, to provide sa_upcall_t
now that <sys/param.h> doesn't include <sys/sa.h>.

(Behold the Power of Ed)

Replace the access to devsw table and the hard-coded major with devsw API.

Catch up to -current.
(CVS: It's not just a program. It's an adventure!)

sysctl(CPU_BOOTED_KERNEL): look for kernel path bootinfo[].

goodbye PS_STRINGS

Catch up with -current.

* `bus_type_t' is gone.
* Use BUS_ADDR() where appropriate to encode I/O space and physical
  address offset into a `bus_addr_t' value.
* Drop obio_bus_map() since it's now completely equivalent to bus_space_map()
* Use bus_space_map2() to map device space at a fixed virtual address.
* Remove the virtual address argument from sbus_sbus_addr()

Change type of dumpmag to u_int32_t since it is actually
a 32bit unsigned magic number.
As per discussion on tech-kern, and fixes port-sparc64/11949.

Catch up to -current.

Sync w/ -current.

* add machdep.booted_device and machdep.boot_args (both fetched from
  appropriate PROM variables).
* return "netbsd" for machdep.booted_kernel if the PROM doesn't return us a
  kernel name.

Sync kqueue branch with -current.

Catch up to -current.

Garbage collect cpu_stashcontext().

Convert to new, smaller cpu_upcall().

defopt "options SUN4*", put #define for each of SUN4, SUN4C, SUN4M and SUN4U
into opt_arch_sparc.h and include this wherever they are used.

Convert to SA framework.
Compilable, but some core functionality stubbed out still.

Catch up with -current. Fix some bogons in the sparc64 kbd/ms
attach code. cd18xx conversion provided by mrg.

file machdep.c was added on branch nathanw_sa on 2001-11-20 16:31:56 +0000

use pmap_k{enter_pa,remove}() where appropriate.

deal with bus_addr_t now being a 64-bit quantity.  fixes PR 14107.

Catch up with -current.

Change bus_space_mmap() signature to the official one.

Update the kqueue branch to HEAD.

Update pmap_update to now take the updated pmap as an argument.
This will allow improvements to the pmaps so that they can more easily defer expensive operations, eg tlb/cache flush, til the last possible moment.

Currently this is a no-op on most platforms, so they should see no difference.

Reviewed by Jason.

_bus_dmamap_load_mbuf: panic with correct function name.

update to -current

use pmap_k* for buffer cache pages.

Catch up to -current.

replace vm_map{,_entry}_t with struct vm_map{,_entry} *.

replace vm_page_t with struct vm_page *.

Sprinkle pmap_update() calls after calls to:
- pmap_enter()
- pmap_remove()
- pmap_protect()
- pmap_kenter_pa()
- pmap_kremove()
as described in pmap(9).

These calls are relatively conservative.  It may be possible to
optimize these a little more.

Catch up with -current.

Sync with HEAD.

eliminate the KERN_* error codes in favor of the traditional E* codes.
the mapping is:

KERN_SUCCESS			0
KERN_INVALID_ADDRESS		EFAULT
KERN_PROTECTION_FAILURE		EACCES
KERN_NO_SPACE			ENOMEM
KERN_INVALID_ARGUMENT		EINVAL
KERN_FAILURE			various, mostly turn into KASSERTs
KERN_RESOURCE_SHORTAGE		ENOMEM
KERN_NOT_RECEIVER		<unused>
KERN_NO_ACCESS			<unused>
KERN_PAGES_LOCKED		<unused>

Sync with HEAD.

Implement MSGBUFSIZE option.

* Correct the `flags' argument in several calls to pmap_enter().
* message buffer initialisation:
	- change the buffer size to 8192 on all platforms
	- don't assume the buffer is always located at physical address 0
	- drop the SUN4 hack that left first half of the page unused;
	  I believe this is no longer necessary, since the msgbuf
	  data structure is duely sanity-checked before use in initmsgbuf().

Sync with HEAD.

Pull up revisions 1.174-1.175 (requested by pk):
  Bus_dma fixes to support certain sbus extension devices on sun4c
  machines.

_bus_dma_valloc_skewed(): return a vaddr_t, not error codes; make missing
boundary check return an error, so the caller can decide how to respond.

sun4_dmamap_load(): Check if boundary condition can be satisfied instead
of panicing blindly.

In cpu_reboot(), only reset the TOD clock if the time is known to be good
enough, e.g. it has been initialized already by inittodr() or set
explicitly before by resettodr().  This prevents the TOD clock from going
way backwards when typing `halt' at the `mount root filesystem' prompt.

Sync with HEAD

split off thread specific stuff from struct sigacts to struct sigctx, leaving
    only signal handler array sharable between threads
move other random signal stuff from struct proc to struct sigctx

This addresses kern/10981 by Matthew Orgass.

Update thorpej_scsipi to -current as of a month ago
A i386 GENERIC kernel compiles without the siop, ahc and bha drivers
(will be updated later). i386 IDE/ATAPI and ncr work, as well as
sparc/esp_sbus. alpha should work as well (untested yet).
siop, ahc and bha will be updated once I've updated the branch to current
-current, as well as machine-dependant code.

Add an align argument to uvm_map() and some callers of that
routine.  Works similarly fto pmap_prefer(), but allows callers
to specify a minimum power-of-two alignment of the region.
How we ever got along without this for so long is beyond me.

Pull up revision 1.166.

Maintain the DVMA map extent subregion boundaries in the bus_dma map
structure.

pull up sparc/sparc64 bus_intr_establish() changes, necessary for sparc64
(originally done by pk, approved by thorpej):

>Add a `device class' interrupt level argument (from machine/intr.h)
>to bus_interrupt_establish().
>
>It's currently only used in sparc64/dev/psycho.c to assign a CPU interrupt
>level to devices in PCI slots.