Create a new header lwp_private.h to contain _lwp_getprivate_fast,
_lwp_gettcb_fast, _lwp_settcb and remove them from mcontext.h, so that:
1. we don't need special hacks to hide them
2. we can include <lwp.h> where needed to get the necessary prototypes
without redefining them locally.

branches: 1.25.36;
Remove the kernel PMC code. Sent yesterday on tech-kern@.

This change:

* Removes "options PERFCTRS", the associated includes, and the associated
ifdefs. In doing so, it removes several XXXSMPs in the MI code, which is
good.

* Removes the PMC code of ARM XSCALE.

* Removes all the pmc.h files. They were all empty, except for ARM XSCALE.

* Reorders the x86 PMC code not to rely on the legacy pmc.h file. The
definitions are put in sysarch.h.

* Removes the kern/sys_pmc.c file, and along with it, the sys_pmc_control
and sys_pmc_get_info syscalls. They are marked as OBSOL in kern,
netbsd32 and rump.

* Removes the pmc_evid_t and pmc_ctr_t types.

* Removes all the associated man pages. The sets are marked as obsolete.

branches: 1.24.16; 1.24.18;
fenv for m68k

branches: 1.23.12; 1.23.30;
Retire varargs.h support. Move machine/stdarg.h logic into MI
sys/stdarg.h and expect compiler to provide proper builtins, defaulting
to the GCC interface. lint still has a special fallback.
Reduce abuse of _BSD_VA_LIST_ by defining __va_list by default and
derive va_list as required by standards.

Stop installing <machine/intr.h> on news68k. Suggested by simonb.

branches: 1.21.2;
Apply some changes for newlock2, taken from other m68k ports.

don't install <machine/db_machdep.h>, this is kernel only

No need to install autoconf.h.

branches: 1.18.4; 1.18.8; 1.18.16;
merge ktrace-lwp.

branches: 1.17.12;
Factor out W{CHAR,INT}_{MAX,MIN} into their own header file.

branches: 1.16.2;
Merge the nathanw_sa branch.

Remove KDIR=, since SYS_INCLUDE=symlinks and KDIR are not supported any more.

Implement pmc(9) -- An interface to hardware performance monitoring
counters. These counters do not exist on all CPUs, but where they
do exist, can be used for counting events such as dcache misses that
would otherwise be difficult or impossible to instrument by code
inspection or hardware simulation.

pmc(9) is meant to be a general interface. Initially, the Intel XScale
counters are the only ones supported.

boot block info stuff is now in MI <sys/bootblock.h>.

branches: 1.12.2;
Install bbinfo.h.

No point in installing svr4_machdep.h.

branches: 1.10.2; 1.10.8;
Add definitions of C99 integer format conversion macros.
XXX Fastest minimum-width integer types haven't been decided upon yet.

Add definitions of C99 specified-width integer type limits.
XXX Fastest minimum-width integer types haven't been decided upon yet.

Add definitions of C99 integer constant macros.
Tidy Makefiles up a little.

Add definitions of C99 minimum-width and greatest-width integer types.
XXX Fastest minimum-width integer types haven't been decided upon yet.

branches: 1.6.2; 1.6.4;
Initial bus_space(9) support for news68k. From hp300.

Add <machine/int_types.h>, which provides namespace-pure definitions
of exact-width integer types.

Require that each each MACHINE/MACHINE_ARCH supply a lock.h. This file
contains the values __SIMPLELOCK_LOCKED and __SIMPLELOCK_UNLOCKED, which
replace the old SIMPLELOCK_LOCKED and SIMPLELOCK_UNLOCKED. These files
are also required to supply inline functions __cpu_simple_lock(),
__cpu_simple_lock_try(), and __cpu_simple_unlock() if locking is to be
supported on that platform (i.e. if MULTIPROCESSOR is defined in the
_KERNEL case). Change these functions to take an int * (&alp->lock_data)
rather than the struct simplelock * itself.

These changes make it possible for userland to use the locking primitives
by including <machine/lock.h>.

Install "machineendian_machdep.h".

branches: 1.2.2;
C99: Define a NAN macro in <math.h> which evaulates to a constant expression of
a single-precision quiet NaN; only to be defined on platforms that do support
this value.

Initial import of news68k port.

Switch all users (except ia64) of custom machine/ansi.h to common_ansi.h

Deduplicate the code among ports and poll definitions of types
directly from a compiler.

This fixes miscompilation of certain programs that instruct compilers
to generate code for different types. This bug has been detected with
-fshort-wchar in EFI firmware.

Proposed and discussed on a mailing list (twice).

Itanium uses custom !ELF fallback switch, temporarily leave it as it is.

branches: 1.1.2; 1.1.8; 1.1.222;
Initial import of news68k port.

Remove multiple inclusion protection from files which just include
MI m68k headers and don't have any own declarations.

branches: 1.1.2; 1.1.8; 1.1.32; 1.1.48;
Initial import of news68k port.

branches: 1.1.2; 1.1.8;
Initial import of news68k port.

Normalize my licenses.

branches: 1.4.74; 1.4.76; 1.4.78; 1.4.80;
Protect against multiple inclusion.

branches: 1.3.6; 1.3.22;
constify, should fix warning for mainbus.c

branches: 1.2.6; 1.2.10; 1.2.14;
Add news1200 support.
Based on a patch from Koichi NISHIWAKI <k-nis@ba2.so-net.ne.jp>

branches: 1.1.2;
Initial import of news68k port.

boot block info stuff is now in MI <sys/bootblock.h>.

branches: 1.1.2;
Use a magic structure with a magic number instead of using nlist(3)
for installboot(8) to patch proto bootblocks.
(This is a preparation to migrate MI installboot.)

branches: 1.1.2; 1.1.8;
Initial import of news68k port.

news68k: Specify proper constraints for bus_space_read region and multi ops.

Synk with next68k.
Also use consistent register name constrains, i.e. no '%' prefix.

Remove cargo-culted '#if 0' code that was designed to produce a
compile-time error if any of the bus_space_*_8 functions was used,
but was documented that it produces a link-time error.

branches: 1.11.4;
s/impliment/implement/ in comment.

Provide PRIxBUSADDR, PRIxBUSSIZE, PRIuBUSSIZE, and PRIxBSH for all arches
to follow arm and (generic) mips.

Reviewed by christos.

branches: 1.9.40;
Add dummy bus_dma(9) typedefs (enabled by __HAVE_NO_BUS_DMA) in <sys/bus.h>
for ports which don't bother to have unnecessary bus_dma(9) implementation
to appease MI driver modules that require bus_dma_tag_t.

For amiga, move <m68k/bus_dma.h> inclusion from <machine/pci_machdep.h>
to <machine/bus.h> since amiga will want actual bus_dma(9) in future
for PCI devices.

Fixes builds on sys/modules/if_axe etc on ancient ports.

"Sounds good" from martin@ on port-m68k@.

branches: 1.8.34; 1.8.38;
Remove clause 3 and 4 from TNF licenses

branches: 1.7.68; 1.7.70; 1.7.72;
Change "inline" back to "__inline" in .h files -- C99 is still too
new, and some apps compile things in C89 mode. C89 keywords stay.

As per core@.

branches: 1.6.2; 1.6.4; 1.6.6;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

merge ktrace-lwp.

branches: 1.4.10;
u_intXX_t -> uintXX_t

- Use ANSI function declarations and make some functions static.
- Some KNF

branches: 1.2.2;
Remove __P().

branches: 1.1.2; 1.1.10;
Initial bus_space(9) support for news68k. From hp300.

Remove clause 3 (UCB advertising clause) from the University of Utah
copyright. Confirmed by Mike Hibler, mike at cs.utah.edu - thanks!
Also, merge UCB and Utah copyright texts back into one, as they
originally were.

Extra verification by snj@.

branches: 1.6.94; 1.6.100; 1.6.102;
Change "inline" back to "__inline" in .h files -- C99 is still too
new, and some apps compile things in C89 mode. C89 keywords stay.

As per core@.

branches: 1.5.2; 1.5.4; 1.5.6;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

merge ktrace-lwp.

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

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

branches: 1.2.2; 1.2.8;
use "static __inline" instead of "extern __inline" so that we can
build without optimization.

finish conversion to the common m68k cacheops:
add support for machine-specific flavors of the ops for off-chip caches.
many thanks to Izumi Tsutsui for his help with this.

Remove multiple inclusion protection from files which just include
MI m68k headers and don't have any own declarations.

branches: 1.1.2; 1.1.8; 1.1.32; 1.1.48;
Initial import of news68k port.

Get news68k ready for the new pmap module:

- Rename pmap_bootstrap() -> pmap_bootstrap1().
- Get news68k-specific initialization out of pmap_bootstrap1():
- Remove anything related to "iiomap"; use %TT0 mappings everywhere
and remove now unnecessary IO space macroes.
- Remove unused/unimplemented "eiomap" stuff.
- Move initialization of cache_ctl / cache_ctrl to locore.s.
- Move initialization of avail_start / avail_end to news68k_init().

Tested on both real NWS-1750 and pkgsrc/emulators/nono 1.6.2.

Largely unify the <machine/cpu.h> headers on the m68k platforms.

Consistently use "intr_depth" as the name of the interrupt depth counter
on m68k platforms.

Make the M68K_MMU_* defines real kernel options, available in opt_m68k_arch.h.
For 68030, 68040, and 68060, infer M68K_MMU_MOTOROLA. For 68010 and 68020, it
must be an explicit option (set in std.${MACHINE} or, in the case of hp300,
inferred from the specific model option).

Don't put the news1[27]00 model defines into INDENT, make them
defflag options and put them in opt_newsconf.h. Make these
options depend on the appropriate M680x0 option (M68030 for each)
so that the CPU option appears correctly in opt_m68k_arch.h.

G/C __HAVE_LEGACY_INTRCNT from news68k.

Switch news68k over to the common interrupt dispatch code.

Switch news68k over to the common m68k vector table.

Make getsr() an inline in <m68k/psl.h> and G/C all of the now-redudant
copies.

Remove duplicated / slightly-tweaked loadustp() (load user segment table)
routines from all of the m68k ports using the shared pmap. Instead, in
pmap_init(), set up a function pointer to the appropriate mmu_load_urp*()
function in mmu_subr.s.

cpu_need_resched():

- Remove all code that should be MI, leaving the bare minimum under arch/.
- Make the required actions very explicit.
- Pass in LWP pointer for convenience.
- When a trap is required on another CPU, have the IPI set it locally.
- Expunge cpu_did_resched().

Refactor the 68040 writeback() from each m68k port's trap handler into a
shared copy: m68040_writeback(). It is essentially a copy of the Atari
version, with some minor cosmetic tweaks and one small performance optimization
from the mvme68k port.

Tested by rjs@ on a Quadra 950. (Thanks!)

- Cleanup for dynamic sysctl:
- Remove unused *_NAMES macros for sysctl.
- Remove unused *_MAXID for sysctls.
- Move CTL_MACHDEP sysctl definitions for m68k into m68k/include/cpu.h and
use them on all m68k machines.

branches: 1.43.14; 1.43.16;
Fix typo "one the" and architecture where appropriate.

branches: 1.42.6; 1.42.10;
make cpu_need_resched() macros consistent; __USE flags

branches: 1.41.6; 1.41.10;
Always include <m68k/cpu.h> (i.e. outside #if defined(_KERNEL))
for crash(8) as amiga and sun3. There are _KERNEL protections in it.

Briefly tested by "build.sh -m news68k -U build".
Further possible botch will be fixed later.

branches: 1.40.2;
Add preliminary PROM internal function based framebuffer console support,
which was demonstrated at Open Source Conference 2011 Kansai @ Kyoto
back in July:
http://www.NetBSD.org/gallery/events.html#opensourceconf2011-Kansai

- map 0xc0000000-0xffffffff PA region (which is mirror of PA 0x0-0x3fffffff)
to the same VA via %tt0 and %tt1 registers and move KVA space accordingly
(like luna68k does for its devices)
- save trap #0 vector for PROM function calls in early bootstrap
and register it to trap #14 to call it from kernel for console output
- add dumb romcall based tty attachment taken from src/sys/dev/ofw/ofcons.c
- add rom function call stubs from news68k/stand/common/romcalls.S
- remove IIOV() macro for device registers where now mapped PA==VA via %tt1

XXX: romcons is not enabled yet because there is no generic interface
XXX: to attach wskbd(4) to non wsdisplay(4) devices like this romcons.

branches: 1.39.4;
- merge and move pasted m68k MD setreg() functions into m68k/m68k_machdep.c
- move m68881_save() and m68881_restore() declarations into <m68k/m68k.h>

Briefly tested and no obvious breakage on atari, sun3, and x68k.

Remove clause 3 (UCB advertising clause) from the University of Utah
copyright. Confirmed by Mike Hibler, mike at cs.utah.edu - thanks!
Also, merge UCB and Utah copyright texts back into one, as they
originally were.

Extra verification by snj@.

branches: 1.37.2; 1.37.4;
Collect cpu_info and friends and move to m68k/include/cpu.h
Add a define __HAVE_CPU_DATA_FIRST which means that cpu_data is the first
member in struct cpu_info.

fix PR 6724 - convert m68k options to defflag's. this means that
M680[12346] are now available from opt_m68k_arch.h. FPSP meantioned
in the PR has already been fixed, and i could not find any more.

i built these kernels to ensure i did not break their builds:

amiga: GENERIC DRACO
atari: HADES FALCON MILAN-PCIIDE
mac68k: GENERIC
sun2: GENERIC
sun3: GENERIC GENERIC3X
cesfic: attempted GENERIC, does not build due to lack of machine/bus.h
hp300: GENERIC
luna68k: GENERIC
mvme68k: GENERIC
news68k: GENERIC
next68k: GENERIC
x68k: GENERIC

branches: 1.35.2; 1.35.4;
Remove uarea swap-out functionality:

- Addresses the issue described in PR/38828.
- Some simplification in threading and sleepq subsystems.
- Eliminates pmap_collect() and, as a side note, allows pmap optimisations.
- Eliminates XS_CTL_DATA_ONSTACK in scsipi code.
- Avoids few scans on LWP list and thus potentially long holds of proc_lock.
- Cuts ~1.5k lines of code. Reduces amd64 kernel size by ~4k.
- Removes __SWAP_BROKEN cases.

Tested on x86, mips, acorn32 (thanks <mpumford>) and partly tested on
acorn26 (thanks to <bjh21>).

Discussed on <tech-kern>, reviewed by <ad>.

Fix few more l_pflag and LP_OWEUPC confusions.

branches: 1.33.4; 1.33.14; 1.33.20; 1.33.22;
Remove CTL_MACHDEP_NAMES, it's not used anywhere.

Ok by martin@.

branches: 1.32.2; 1.32.6;
- account idepth in all interrupt handlers
- use idepth for CLKF_INTR()

branches: 1.31.2;
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.

branches: 1.30.2;
Add ci_cpuid where it's missing.

branches: 1.29.2; 1.29.4; 1.29.8;
Move declarations of m68k common functions
from <machine/cpu.h> to <m68k/m68k.h>.
While here, remove some obsolete function decls.

Add missing call to lwp_startup() in lwp_trampoline() (which was renamed
from proc_trampoline to match the other ports).

A DIAGNOSTIC kernel will now boot and run. LOCKDEBUG still doesn't work yet.
Also, my amiga no longer loses time.

Adapt news68k to yamt-idlelwp. Tested on NWS-1750.

branches: 1.26.2; 1.26.4; 1.26.10;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.25.2;
Remove spllowersoftclock() and CLKF_BASEPRI(), and always dispatch callouts
via a soft interrupt. In the near future, softclock will be run from process
context.

Apply some changes for newlock2, taken from other m68k ports.

merge ktrace-lwp.

branches: 1.22.10;
Add definitions for ports CTRL_POWER and CTRL_LED.

Backout previous because:
- we should fix genassym.sh to generate proper unsigned values rather than
remove use of such values in each source
- 0xe0dc0000 is port to control LED so INTIOBASE1700_OFF is not proper name
- these LED debug code didn't work on news1200 and it should be fixed anyway

Convert expression for (0xe0dc0000-INTIOBASE1700) directly within a cpp
macro as otherwise gas gets handed an X - -Y expression and w 2.15 it won't
treat that as a valid expression

don't expose cpu_info to userland.

move some per-cpu data definitions to MI place so that they can be modified
without touching all ports. discussed on tech-kern@.

Rearrange process exit path to avoid need to free resources from different
process context ('reaper').

From within the exiting process context:
* deactivate pmap and free vmspace while we can still block
* introduce MD cpu_lwp_free() - this cleans all MD-specific context (such
as FPU state), and is the last potentially blocking operation;
all of cpu_wait(), and most of cpu_exit(), is now folded into cpu_lwp_free()
* process is now immediatelly marked as zombie and made available for pickup
by parent; the remaining last lwp continues the exit as fully detached
* MI (rather than MD) code bumps uvmexp.swtch, cpu_exit() is now same
for both 'process' and 'lwp' exit

uvm_lwp_exit() is modified to never block; the u-area memory is now
always just linked to the list of available u-areas. Introduce (blocking)
uvm_uarea_drain(), which is called to release the excessive u-area memory;
this is called by parent within wait4(), or by pagedaemon on memory shortage.
uvm_uarea_free() is now private function within uvm_glue.c.

MD process/lwp exit code now always calls lwp_exit2() immediatelly after
switching away from the exiting lwp.

g/c now unneeded routines and variables, including the reaper kernel thread

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

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

branches: 1.15.2;
add prototype for switch_lwp_exit()

Merge the nathanw_sa branch.

Remove __P().

finish conversion to the common m68k cacheops:
add support for machine-specific flavors of the ops for off-chip caches.
many thanks to Izumi Tsutsui for his help with this.

merge the 12 copies of vm_machdep.c on the m68k platforms.
clean up some other stuff along the way, including:
- use m68k/cacheops.*, remove duplicates from cpu.h.
- centralize a few declarations in (all the copies of) cpu.h.
- define M68K_VAC on platforms which have a VAC.
- switch the sun platforms to the (now common) proc_trampoline().
- do the phys_map thang on the sun platforms too, no reason not to.

branches: 1.10.8;
use _KERNEL_OPT

Fix error on config without options news1700.
DC_BE and IC_BE bits are enabled at runtime since rev 1.7.

branches: 1.8.2;
Unification of the m68k syscall() function.

branches: 1.7.2;
Make it possible to enable/disable DC_BE and IC_BE bits in %cacr at runtime
and enable them on news1200/1400/1500 (which have no L2cache).

Initial bus_space(9) support for news68k. From hp300.

Make need_resched() take a "struct cpu_info *" argument. This
causes gives a primitive form of processor affinity. Its use in
roundrobin() still needs some work.

branches: 1.4.4;
First sweep at scheduler state cleanup. Collect MI scheduler
state into global and per-CPU scheduler state:

- Global state: sched_qs (run queues), sched_whichqs (bitmap
of non-empty run queues), sched_slpque (sleep queues).
NOTE: These may collectively move into a struct schedstate
at some point in the future.

- Per-CPU state, struct schedstate_percpu: spc_runtime
(time process on this CPU started running), spc_flags
(replaces struct proc's p_schedflags), and
spc_curpriority (usrpri of processes on this CPU).

- Every platform must now supply a struct cpu_info and
a curcpu() macro. Simplify existing cpu_info declarations
where appropriate.

- All references to per-CPU scheduler state now made through
curcpu(). NOTE: this will likely be adjusted in the future
after further changes to struct proc are made.

Tested on i386 and Alpha. Changes are mostly mechanical, but apologies
in advance if it doesn't compile on a particular platform.

Use CTRL_AST interrupt to handle asynchronous trap.

Add news1200 support.
Based on a patch from Koichi NISHIWAKI <k-nis@ba2.so-net.ne.jp>

branches: 1.1.2;
Initial import of news68k port.

Remove defines DB_ELF_SYMBOLS and DB_ELFSIZE, which are defined
in <m68k/db_machdep.h>.

branches: 1.2.24; 1.2.40;
Enable ELF symbol support to migrate. DB_AOUT_SYMBOLS is still defined.

branches: 1.1.2; 1.1.8;
Initial import of news68k port.

Add getlabelusesmbr(), as proposed in
http://mail-index.netbsd.org/tech-userlevel/2011/08/25/msg005404.html
This is used by disk tools such as disklabel(8) to dynamically decide is
the undelyling platform uses a disklabel-in-mbr-partition or not
(instead of using a compile-time list of ports).
getlabelusesmbr() reads the sysctl kern.labelusesmbr, takes its value from the
machdep #define LABELUSESMBR.
For evbmips, make LABELUSESMBR 1 if the platform uses pmon
as bootloader, and 0 (the previous value) otherwise.

Use _NEWS68K_FOO_H_ rather than _MACHNE_FOO_H_.

branches: 1.1.2; 1.1.8; 1.1.32; 1.1.48;
Initial import of news68k port.

Remove multiple inclusion protection from files which just include
MI m68k headers and don't have any own declarations.

branches: 1.1.2; 1.1.8; 1.1.32; 1.1.48;
Initial import of news68k port.

branches: 1.2.6;
In the `MY THAT'S GROSS' department...
Eliminate the recursive include of machine/endian.h from sys/endian.h.

branches: 1.1.2;
Initial import of news68k port.

branches: 1.1.6;
In the `MY THAT'S GROSS' department...
Eliminate the recursive include of machine/endian.h from sys/endian.h.

Re-factor the 680x0 Function Code definitions into their own
separate file (as was done on the sun2/sun3 ports ages ago)
and switch everyone to the common header.

branches: 1.1.2; 1.1.18;
fenv for m68k

branches: 1.1.2; 1.1.8;
Initial import of news68k port.

branches: 1.1.2; 1.1.8;
Initial import of news68k port.

branches: 1.1.2; 1.1.8;
Initial import of news68k port.

branches: 1.1.2; 1.1.8;
Initial import of news68k port.

branches: 1.1.2; 1.1.4; 1.1.12;
Add definitions of C99 integer constant macros.

branches: 1.1.2; 1.1.4; 1.1.12;
Add definitions of C99 integer format conversion macros.
XXX Fastest minimum-width integer types haven't been decided upon yet.

branches: 1.1.2; 1.1.4; 1.1.12;
Add definitions of C99 specified-width integer type limits.
XXX Fastest minimum-width integer types haven't been decided upon yet.

branches: 1.1.2; 1.1.4; 1.1.12;
Add definitions of C99 minimum-width and greatest-width integer types.
XXX Fastest minimum-width integer types haven't been decided upon yet.

branches: 1.1.2;
Add <machine/int_types.h>, which provides namespace-pure definitions
of exact-width integer types.

Add _KERNEL guards around most of the definitions in these files.

G/C __HAVE_LEGACY_INTRCNT from news68k.

Switch news68k over to the common interrupt dispatch code.

news68k/intr.h: Fix includes. Put some definitions under _KERNEL.

branches: 1.27.32;
s/static inline/static __inline/g for consistency.

branches: 1.26.54;
Remove trailing spaces and TABs.

branches: 1.25.4; 1.25.6;
Include <sys/evcnt.h> instead of <sys/device.h> for struct evcnt
to avoid recursive dependency (though news68k has not been switched
to using intr evcnt yet).

branches: 1.24.2;
__inline -> inline

branches: 1.23.4;
Make cpu_intr_p() inline.

Unify splraiseipl(9) implementation among m68k ports as per
suggestion from isaki@ on port-m68k.

For news68k:
- export ipl2psl_table[] and make it uint16_t
- make makeiplcookie(9) inline
- put PSL_S bit into ipl2psl_table[] rather than adding it in makeiplcookie(9)
- define both IPL_SCHED and IPL_HIGH independently to avoid confusion

branches: 1.21.2; 1.21.4;
Certainly this file is derived from src/sys/arch/x68k/include/intr.h,
so sync copyright notice with it. Approved by martin@.

branches: 1.20.6; 1.20.8; 1.20.10;
- account idepth in all interrupt handlers
- use idepth for CLKF_INTR()

Interrupt handling changes, in discussion since February:

- Reduce available SPL levels for hardware devices to none, vm, sched, high.
- Acquire kernel_lock only for interrupts at IPL_VM.
- Implement threaded soft interrupts.

branches: 1.18.16; 1.18.18; 1.18.24;
- Shrink ipl_cookie_t from 32-bits to 16-bits (large enough to hold
an SR value or an IPL_* constant).
- Take advange of the smaller ipl_cookie_t to shrink kmutex_t from
16 bytes to 8 bytes by overlapping storage where possible.
- Implement a RAS-based _lock_cas() for mc68010 systems (Sun2). See
sun68k/sun68k/isr.c.

Tested on various m68k platforms, but NOT Sun2. In any case, at least
Sun2 compiles now.

branches: 1.17.2;
Remove #ifdef _KERNEL since this file is no longer exported.

branches: 1.16.2;
Remove spllowersoftclock() and CLKF_BASEPRI(), and always dispatch callouts
via a soft interrupt. In the near future, softclock will be run from process
context.

- fix prototype for ctrl_int2 port (u_char -> uint8_t) in intr.h
- use proper macro to assert/clear ctrl_int2 port for softintr
- use KDASSERT() rather than #ifdef DEBUG + assert()
- don't count uvmexp.softs twice in softintr_dispatch()

XXX: Maybe we should have common m68k/softintr.c like mips ports.

Implement generic softintr(9) support for news68k.
Mostly taken from mvme68k.

merge yamt-splraiseipl branch.

- finish implementing splraiseipl (and makeiplcookie).
http://mail-index.NetBSD.org/tech-kern/2006/07/01/0000.html
- complete workqueue(9) and fix its ipl problem, which is reported
to cause audio skipping.
- fix netbt (at least compilation problems) for some ports.
- fix PR/33218.

branches: 1.12.14; 1.12.16;
Change "inline" back to "__inline" in .h files -- C99 is still too
new, and some apps compile things in C89 mode. C89 keywords stay.

As per core@.

branches: 1.11.2; 1.11.4; 1.11.6;
Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

merge ktrace-lwp.

branches: 1.9.16;
splx() doesn't require a return value. (from mvme68k)

branches: 1.8.2;
Remove __P().

branches: 1.7.8;
Remove the use of splimp() from the NetBSD kernel. splnet()
and only splnet() is allowed for the protection of data structures
used by network devices.

branches: 1.6.2;
Make sure everybody has an splvm() and equate it with splimp() (splimp()
is the historical name for this interrupt level, and the historical name
is going to go away in the near future).

Use single_inst_b{set,clr}_b() macro defined in m68k/asm_single.h.

branches: 1.4.2;
Add spllock(). See spl(9) for details.

Make sure access of ssir atomic. (from luna68k)

Modify software interrupt handling a bit.

branches: 1.1.2;
Initial import of news68k port.

Remove multiple inclusion protection from files which just include
MI m68k headers and don't have any own declarations.

branches: 1.1.2; 1.1.8; 1.1.32; 1.1.48;
Initial import of news68k port.

- Normalize inclusion protection (remove)
- Move CHAR_{MIN,MAX} to a common file.
- Fix broken comments

branches: 1.2.112; 1.2.116;
Remove multiple inclusion protection from files which just include
MI m68k headers and don't have any own declarations.

branches: 1.1.2; 1.1.8; 1.1.32; 1.1.48;
Initial import of news68k port.

Consistently define WARN in a way that passes format string checks, i.e.
always uses the same number of arguments as given in the format string.

branches: 1.7.44; 1.7.60;
Remove clause 3 and 4 from TNF licenses

branches: 1.6.72; 1.6.74; 1.6.76;
free -> dealloc
unsigned -> size_t for alloc/dealloc

branches: 1.5.2;
Protect against multiple inclusion.

branches: 1.4.2; 1.4.18; 1.4.34;
Split elf32 vs. elf64 handling in loadfile(), including support for
each separately and explicitly. BOOT_ELF is now BOOT_ELF32 and
BOOT_ELF64, and ELFSIZE should no longer be defined in loadfile_machdep.h.

branches: 1.3.4; 1.3.6;
Use MI loadfile() in loadprotoblocks().

Enable LOAD_HDR and COUNT_HDR. (would be required on ELF)

branches: 1.1.2; 1.1.8;
Initial import of news68k port.

branches: 1.1.6;
Require that each each MACHINE/MACHINE_ARCH supply a lock.h. This file
contains the values __SIMPLELOCK_LOCKED and __SIMPLELOCK_UNLOCKED, which
replace the old SIMPLELOCK_LOCKED and SIMPLELOCK_UNLOCKED. These files
are also required to supply inline functions __cpu_simple_lock(),
__cpu_simple_lock_try(), and __cpu_simple_unlock() if locking is to be
supported on that platform (i.e. if MULTIPROCESSOR is defined in the
_KERNEL case). Change these functions to take an int * (&alp->lock_data)
rather than the struct simplelock * itself.

These changes make it possible for userland to use the locking primitives
by including <machine/lock.h>.

branches: 1.1.4;
Create a new header lwp_private.h to contain _lwp_getprivate_fast,
_lwp_gettcb_fast, _lwp_settcb and remove them from mcontext.h, so that:
1. we don't need special hacks to hide them
2. we can include <lwp.h> where needed to get the necessary prototypes
without redefining them locally.

branches: 1.1.6;
C99: Define a NAN macro in <math.h> which evaulates to a constant expression of
a single-precision quiet NaN; only to be defined on platforms that do support
this value.

Merge the nathanw_sa branch.

branches: 1.1.2;
file mcontext.h was initially added on branch nathanw_sa.

branches: 1.2.4;
Merge newlock2 to head.

branches: 1.1.2;
file mutex.h was initially added on branch newlock2.

proper sizing of kmem_arena on different ports

PR port-i386/45946: Kernel locks up in VMEM system

branches: 1.16.4; 1.16.8;
Remove clause 3 (UCB advertising clause) from the University of Utah
copyright. Confirmed by Mike Hibler, mike at cs.utah.edu - thanks!
Also, merge UCB and Utah copyright texts back into one, as they
originally were.

Extra verification by snj@.

branches: 1.15.2; 1.15.4;
Switch NetBSD/news68k to using 8KB/page in kernel.
It slightly improves performance on NWS-1750D (MC68030 25MHz):
http://mail-index.NetBSD.org/port-m68k/2009/12/08/msg000204.html

MI m68k/pmap_motorola.c and other sources can handle both 4KB/8KB pages
(amiga and atari have used 8KB pages for many years) and there is
no binary compatibility issue on it.
(kernel modules might be affected but 5.99.29 was just two days ago)

branches: 1.14.2; 1.14.4;
Refactoring MD segment related definitions on m68k ports:
- move macro SEGSHIFT, NBSEG, and SEGOFSET from <machine/param.h>
to <m68k/pmap_motorola.h> where they should belong
- also simplify NBSEG macro for both 020/030 and 040/060 cases
- also move m68k_trunc_seg(), m68k_round_seg(), and m68k_seg_offset()
(that use SEGOFSET) from <m68k/param.h> to <m68k/pmap_motorola.h>
- add comments about each segment size value used on pmap_motorola
implementation
- add TIA_SIZE, TIA_SHIFT, TIB_SIZE, and TIB_SHIFT macro which can be
used for ste/pte index sizes
- use proper vaddr_t cast instead of unsigned for SEGOFSET/PGOFSET macro

Tested on atari, hp300, and news68k.

Fix wrong NBSEG values for all hp300 pmap derived m68k ports.
They were incorrect since 1997 on amiga and atari, and since 2002
on other ports, but fortunately they don't look so fatal.

Anyway, these values will be moved into <m68k/pmap_motorola.h> soon
since they are quite pmap implementation dependent.

branches: 1.12.10;
Remove COMPAT_HPUX.

branches: 1.11.20; 1.11.26; 1.11.32;
Merge #ifdef _KERNEL stuff into one place.

branches: 1.10.2;
Implement generic softintr(9) support for news68k.
Mostly taken from mvme68k.

Use _NEWS68K_FOO_H_ rather than _MACHNE_FOO_H_.

branches: 1.8.16;
Move UCB-licensed code from 4-clause to 3-clause licence.

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

branches: 1.7.2;
Remove __P().

merge pmap.h for all 4k-page motorola-MMU (or compatible) m68k platforms.

branches: 1.5.8;
use _KERNEL_OPT

branches: 1.4.2;
Change UPAGES from 3 to 2. (sync with hp300)

branches: 1.3.2;
Reduce NKMEMPAGES_MIN_DEFAULT.

Update for the NKMEMPAGES changes.

branches: 1.1.2;
Initial import of news68k port.

branches: 1.1.2; 1.1.8;
Initial import of news68k port.

Since we're batting 1.000 on "platforms that adopt new-pmap_68k that also
use machine_bootmap[]", just remove the option (it looks like it would
be opted into on every platform).

Introduce a hook for machine-specific code to influence pmap_bootstrap1()
in the new pmap_68k.

The pmap_bootmap structure allows machine-specific code to:
- Specify "keepout" ranges, intended to clamp the managed kernel address
space to keep it out of regions mapped using Transparent Translation
(usually devices).
- Allocate unmanaged kernel virtual address ranges (usually for devices).
- Optionally map physical addresses to those virtual address ranges (guess
what this might be used for!).

VM_MAX_KERNEL_ADDRESS is now run-time calculated. It starts off as
the very last page of the kernel virtual address space, and is reduced
as it encounters KEEPOUT areas.

Initially, use this on luna68k, news68k, and virt68k to KEEPOUT the
TT-mapped ranges.

While here, add some missing RELOC()s; no difference on VA==PA platforms,
but bound to blow up eventually.

Add the glue for the new m68k pmap module. Mostly pulled from luna68k.

XXX:
Some device drivers require kvtop() for physical address for DMA xfer,
but currently pmap_68k.c doesn't provide it.

Confirmed working (with ugly kvtop() -> vtophys() patch) on NWS-1750.

Define values for the 68030 TT registers in terms of the definitions
in <m68k/mmu_30.h> rather than using magic numbers.

merge pmap.h for all 4k-page motorola-MMU (or compatible) m68k platforms.

untangle includes a bit:
don't include cpu.h in pmap.h, nor cacheops.h in cpu.h. instead,
include cpu.h and cacheops.h in just those .c files that need them.

it really helps to get the stub right before cutting + pasting it 27 times.
alas, I did not. doh.

add pmap_remove_all() hook (empty on most platforms so far).

branches: 1.10.4;
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.

branches: 1.9.2; 1.9.4;
replace vm_page_t with struct vm_page *.

replace {simple_,}lock{_data,}_t with struct {simple,}lock {,*}.

Garbage-collect pmap_page_index().

Undo a misguided previous change to the pmap_update() API.

Give pmap_update() an argument (a pmap_t) so that it knows which
pmap it should be updating.

#define away pmap_update() in <machine/pmap.h> so that no function
call overhead is incurred as we start sprinkling pmap_update() calls
throughout the source tree (no pmaps currently defer operations, but
we are adding the infrastructure to allow them to do so).

branches: 1.3.2; 1.3.4;
Make PMAP_PAGEIDLEZERO() return a boolean value. FALSE indidcates
that the page being zero'd was not completed and that page zeroing
should be aborted. This may be used by machine-dependent code doing
slow page access to reduce the latency of running a process that has
become runnable while in the middle of doing a slow page zero.

Add uvm_pageidlezero support. From x68k.

branches: 1.1.2;
Initial import of news68k port.

Remove the kernel PMC code. Sent yesterday on tech-kern@.

This change:

* Removes "options PERFCTRS", the associated includes, and the associated
ifdefs. In doing so, it removes several XXXSMPs in the MI code, which is
good.

* Removes the PMC code of ARM XSCALE.

* Removes all the pmc.h files. They were all empty, except for ARM XSCALE.

* Reorders the x86 PMC code not to rely on the legacy pmc.h file. The
definitions are put in sysarch.h.

* Removes the kern/sys_pmc.c file, and along with it, the sys_pmc_control
and sys_pmc_get_info syscalls. They are marked as OBSOL in kern,
netbsd32 and rump.

* Removes the pmc_evid_t and pmc_ctr_t types.

* Removes all the associated man pages. The sets are marked as obsolete.

branches: 1.1.2; 1.1.4; 1.1.6; 1.1.202; 1.1.204;
Implement pmc(9) -- An interface to hardware performance monitoring
counters. These counters do not exist on all CPUs, but where they
do exist, can be used for counting events such as dcache misses that
would otherwise be difficult or impossible to instrument by code
inspection or hardware simulation.

pmc(9) is meant to be a general interface. Initially, the Intel XScale
counters are the only ones supported.

m68k syscall rototill:

- Switch all m68k-based ports over to __HAVE_SYSCALL_INTERN.
- Add systrace glue.
- Define struct mdproc in <m68k/proc.h> instead of <machine/proc.h>.
(They were all defined exactly the same anyway, other than a couple
of the MDP_* flags.)

branches: 1.1.2; 1.1.8; 1.1.12; 1.1.16; 1.1.24;
Initial import of news68k port.

branches: 1.1.2; 1.1.8;
Initial import of news68k port.

branches: 1.1.2; 1.1.8;
Initial import of news68k port.

Add the glue for the new m68k pmap module. Mostly pulled from luna68k.

XXX:
Some device drivers require kvtop() for physical address for DMA xfer,
but currently pmap_68k.c doesn't provide it.

Confirmed working (with ugly kvtop() -> vtophys() patch) on NWS-1750.

merge pte.h for m68k w/ motorola or compatible MMU
(only 4k-page platforms so far).

branches: 1.1.2; 1.1.8; 1.1.16;
Initial import of news68k port.

branches: 1.1.2; 1.1.8;
Initial import of news68k port.

Remove multiple inclusion protection from files which just include
MI m68k headers and don't have any own declarations.

branches: 1.1.2; 1.1.8; 1.1.32; 1.1.48;
Initial import of news68k port.

Make sure to return PROM prompt even if loading kernel fails halfway.

branches: 1.1.2; 1.1.6; 1.1.8;
Initial import of news68k port.

branches: 1.2.4;
Merge newlock2 to head.

branches: 1.1.2;
file rwlock.h was initially added on branch newlock2.

branches: 1.1.2; 1.1.8;
Initial import of news68k port.

branches: 1.1.2; 1.1.8;
Initial import of news68k port.

Retire varargs.h support. Move machine/stdarg.h logic into MI
sys/stdarg.h and expect compiler to provide proper builtins, defaulting
to the GCC interface. lint still has a special fallback.
Reduce abuse of _BSD_VA_LIST_ by defining __va_list by default and
derive va_list as required by standards.

branches: 1.1.2; 1.1.8;
Initial import of news68k port.

branches: 1.2.18;
merge ktrace-lwp.

branches: 1.1.6;
Add m68k sunos_machdep.h

Remove compat_svr4 and compat_svr4_32, as discussed on tech-kern@ recently,
but also as discussed several times in the past.

branches: 1.1.2; 1.1.8; 1.1.44; 1.1.222;
Initial import of news68k port.

branches: 1.1.2; 1.1.8;
Initial import of news68k port.

Largely unify the <machine/cpu.h> headers on the m68k platforms.

G/C __HAVE_LEGACY_INTRCNT from news68k.

Switch news68k over to the common interrupt dispatch code.

Define __HAVE_LEGACY_INTRCNT to indicate this port uses legacy intrcnt
interrupt accounting.

branches: 1.12.66; 1.12.68;
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.

branches: 1.11.32; 1.11.42;
Now that __HAVE_TIMECOUNTER and __HAVE_GENERIC_TODR are invariants,
remove the conditionals and the code associated with the undef case.

branches: 1.10.2; 1.10.8;
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.

branches: 1.9.10;
Generic soft interrupts are mandatory.

branches: 1.8.6; 1.8.14;
Implement generic softintr(9) support for news68k.
Mostly taken from mvme68k.

Switch news68k to timecounters. From gdamore on port-news68k.

branches: 1.6.2;
Switch news68k to MI todr.

branches: 1.5.4; 1.5.8;
Remove multiple inclusion protection from files which just include
MI m68k headers and don't have any own declarations.

branches: 1.4.16; 1.4.32;
Use "#define<tab>".

branches: 1.3.6; 1.3.10; 1.3.14;
Remove __BROKEN_CONFIG_UNIT_USAGE.
This has been fixed on news1200 merge.

add __BROKEN_CONFIG_UNIT_USAGE #define, becuase these ports do very
wrong things with device configuration data "cf_unit" information.

branches: 1.1.2;
Initial import of news68k port.

Retire varargs.h support. Move machine/stdarg.h logic into MI
sys/stdarg.h and expect compiler to provide proper builtins, defaulting
to the GCC interface. lint still has a special fallback.
Reduce abuse of _BSD_VA_LIST_ by defining __va_list by default and
derive va_list as required by standards.

branches: 1.1.2; 1.1.8;
Initial import of news68k port.

No need for our own spurious interrupt handler now that m68k_intr.c
handles them for us.

Switch news68k over to the common interrupt dispatch code.

Switch news68k over to the common m68k vector table.

G/C unused P1PAGES.

Introduce a hook for machine-specific code to influence pmap_bootstrap1()
in the new pmap_68k.

The pmap_bootmap structure allows machine-specific code to:
- Specify "keepout" ranges, intended to clamp the managed kernel address
space to keep it out of regions mapped using Transparent Translation
(usually devices).
- Allocate unmanaged kernel virtual address ranges (usually for devices).
- Optionally map physical addresses to those virtual address ranges (guess
what this might be used for!).

VM_MAX_KERNEL_ADDRESS is now run-time calculated. It starts off as
the very last page of the kernel virtual address space, and is reduced
as it encounters KEEPOUT areas.

Initially, use this on luna68k, news68k, and virt68k to KEEPOUT the
TT-mapped ranges.

While here, add some missing RELOC()s; no difference on VA==PA platforms,
but bound to blow up eventually.

Add the glue for the new m68k pmap module. Mostly pulled from luna68k.

XXX:
Some device drivers require kvtop() for physical address for DMA xfer,
but currently pmap_68k.c doesn't provide it.

Confirmed working (with ugly kvtop() -> vtophys() patch) on NWS-1750.

Bump DFLSSIZ from 512KB to 2MB on all hp300 pmap m68k ports.

Some modern applications could require 512KB buffer on stack and
no particular comment on port-m68k@:
https://mail-index.netbsd.org/port-m68k/2025/02/02/msg000893.html

branches: 1.23.30;
Add MAX/MIN PAGE_SIZE and PAGE_SHIFT definitions of m68k for jemalloc(3).

Background:
- All m68k ports have fixed PAGE_SIZE value in their kernels,
but each port uses different PAGE_SIZE value (4096 or 8192)
due to historical reasons.
- Currently module(7) binaries are built per each port so
all m68k kernel sources don't support run-time variable PAGE_SIZE.
- MI <uvm/uvm_param.h> assumes that the port supports a variable
PAGE_SIZE on module(7) builds if both MAX_PAGE_SIZE and MIN_PAGE_SIZE
are defined and they have different values.
- On the other hand, jemalloc(3) checks MAX_PAGE_SHIFT in
src/external/bsd/jemalloc/include/jemalloc/internal/jemalloc_internal_defs.h
for internal optimization.
- m68k ports share userland binaries (especially pkgsrc binaries)
among all ports, so we need to define MAX_PAGE_SHIFT as 13 to
support m68k ports where PAGE_SIZE==8192.
(though this would affect only if static binaries built on
4k page hosts are executed on 8k page hosts)

To solve these inconsistency on PAGE_SIZE definitions,
we should have an independent PAGE_SIZE related definitions
for userland, but it requires major reorganization.
For now (especially for netbsd-9) we define MAX/MIN PAGE_SIZE and
PAGE_SHIFT values in <m68k/vmparam.h> only in !defined(_KERNEL) case.

Discussed on source-changes-d@ and tech-kern@ with christos@ and thorpej@:
https://mail-index.netbsd.org/source-changes-d/2020/01/thread1.html#012035
https://mail-index.netbsd.org/tech-kern/2020/01/thread1.html#025954

Should be pulled up to netbsd-9.

branches: 1.22.2; 1.22.4;
Fix lingering page size comments.

Pointed out by christos@ on port-m68k@:
http://mail-index.netbsd.org/port-m68k/2019/06/06/msg000726.html

XXX: we also need MAX_PAGE_SIZE in somewhere for newer jemalloc?

branches: 1.21.14;
PR port-mac68k/51923
Bump default MAXTSIZ to 32MB for m68k ports, which allos us to use GCC 5.4 on
GENERIC kernels.
Ok jklos

PR port-mac68k/51923
Remove unused SYSPTSIZE and USRPTSIZE from m68k ports.
Ok jklos

branches: 1.19.8; 1.19.26; 1.19.30; 1.19.34;
Add preliminary PROM internal function based framebuffer console support,
which was demonstrated at Open Source Conference 2011 Kansai @ Kyoto
back in July:
http://www.NetBSD.org/gallery/events.html#opensourceconf2011-Kansai

- map 0xc0000000-0xffffffff PA region (which is mirror of PA 0x0-0x3fffffff)
to the same VA via %tt0 and %tt1 registers and move KVA space accordingly
(like luna68k does for its devices)
- save trap #0 vector for PROM function calls in early bootstrap
and register it to trap #14 to call it from kernel for console output
- add dumb romcall based tty attachment taken from src/sys/dev/ofw/ofcons.c
- add rom function call stubs from news68k/stand/common/romcalls.S
- remove IIOV() macro for device registers where now mapped PA==VA via %tt1

XXX: romcons is not enabled yet because there is no generic interface
XXX: to attach wskbd(4) to non wsdisplay(4) devices like this romcons.

branches: 1.18.4;
Remove clause 3 (UCB advertising clause) from the University of Utah
copyright. Confirmed by Mike Hibler, mike at cs.utah.edu - thanks!
Also, merge UCB and Utah copyright texts back into one, as they
originally were.

Extra verification by snj@.

branches: 1.17.2; 1.17.4;
Remove incomplete, never worked dynamic run-time memory registration
(uvm_page_physload(9)). This functionality will be re-added later.

branches: 1.16.2; 1.16.4;
Use PGSHIFT from <machine/param.h> for PAGE_SHIFT.
We can assume PGSHIFT is always constant on current
m68k pmap_motorola implementation.
Also fix some leftover HP300 comments on some ports.

Minor tweak to the pv_table management in the Hibler-derived m68k pmaps:
The head of the list is now a pv_header, which contains the first pv_entry
as well as a 16-bit attributes field (replaces the pmap_attributes array
plus the pv_entry::pv_flags field) as a 16-bit count of caller-specified
cache-inhibited mappings.

Tested on hp300 (shared pmap_motorola.c), changes to atari and amiga copies
are purely mechanical.

Remove SHMMAXPGS from all kernel configs. Dynamically compute the
initial limit as 1/4 of the physical memory. Ensure the limit is at
least 1024 pages, the old default on most platforms.

branches: 1.13.78; 1.13.86; 1.13.92;
merge ktrace-lwp.

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.

branches: 1.11.8; 1.11.10;
Move UCB-licensed code from 4-clause to 3-clause licence.

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

branches: 1.10.2;
Use PAGE_SIZE rather than NBPG.

Use __LDPGSZ (which must be == USRTEXT) as the text address for a.out
executables, and eliminate the USRTEXT constant, which was only used
by the a.out exec code.

MAXSLP is defined to be a machine-independent scheduling parameter,
so move it into sys/param.h.

branches: 1.7.2; 1.7.8;
Per discussion w/ chuck and chuck, restructure the md page stuff
to use a structure called "vm_page_md", and use __HAVE_VM_PAGE_MD
and __HAVE_PMAP_PHYSSEG.

Add a VM_MDPAGE_MEMBERS macro that defines pmap-specific data for
each vm_page structure. Add a VM_MDPAGE_INIT() macro to init this
data when pages are initialized by UVM. These macros are mandatory,
but ports may #define them to nothing if they are not needed/used.

This deprecates struct pmap_physseg. As a transitional measure,
allow a port to #define PMAP_PHYSSEG so that it can continue to
use it until its pmap is converted to use VM_MDPAGE_MEMBERS.

Use all this stuff to eliminate a lot of extra work in the Alpha
pmap module (it's smaller and faster now). Changes to other pmap
modules will follow.

branches: 1.5.2;
Remove unused pcbb() macro.

branches: 1.4.2;
We use 4K pages on the news68k. Make PAGE_SIZE and friends into
compile-time constants.

Update for the NKMEMPAGES changes.

Remove obsoleted macros.

branches: 1.1.2;
Initial import of news68k port.

merge ktrace-lwp.

branches: 1.1.2;
Factor out W{CHAR,INT}_{MAX,MIN} into their own header file.

Split softc and device_t for zsc(4) and its children.

XXX we should restructure MI APIs and make it really machine independent.

branches: 1.6.14;
Add an overlooked define of IPL_ZS, matching with splzs().

branches: 1.5.6; 1.5.22; 1.5.24; 1.5.28; 1.5.30;
Implement generic softintr(9) support for news68k.
Mostly taken from mvme68k.

merge ktrace-lwp.

branches: 1.3.16;
Move UCB-licensed code from 4-clause to 3-clause licence.

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

branches: 1.2.2;
Remove __P().

branches: 1.1.2; 1.1.8; 1.1.16;
Initial import of news68k port.