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History log of /src/sys/arch/next68k/include/cpu.h
RevisionDateAuthorComments
 1.58  20-Jan-2024  thorpej Largely unify the <machine/cpu.h> headers on the m68k platforms.
 1.57  19-Jan-2024  thorpej Consistently use "intr_depth" as the name of the interrupt depth counter
on m68k platforms.
 1.56  18-Jan-2024  thorpej 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).
 1.55  18-Jan-2024  thorpej Switch next68k over to common interrupt dispatch and G/C __HAVE_LEGACY_INTRCNT.
Also included is G/C of the old ssir stuff that's no longer used.
 1.54  13-Jan-2024  thorpej Switch next68k over to the common m68k vector table.
 1.53  09-Jan-2024  thorpej 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.
 1.52  11-Feb-2023  tsutsui Handle NeXT Turbo VRAM regions properly.

Info from Andreas Grabher on port-next68k@:
https://mail-index.netbsd.org/port-next68k/2023/02/06/msg000052.html

Also refactor bus_space_map(9) and fix (unused) bus_space_mmap(9).
 1.51  27-Jan-2023  tsutsui next68k: Fix delay_divisor value for proper delay(9) on 68040.
 1.50  23-Nov-2019  ad branches: 1.50.26;
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().
 1.49  18-Feb-2019  thorpej branches: 1.49.4;
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!)
 1.48  17-Dec-2016  flxd branches: 1.48.16;
Fix typo "one the" and architecture where appropriate.
 1.47  19-Oct-2013  christos branches: 1.47.6; 1.47.10;
make cpu_need_resched() macros consistent; __USE flags
 1.46  02-Feb-2012  tsutsui branches: 1.46.6; 1.46.10;
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.
 1.45  16-May-2011  tsutsui branches: 1.45.4; 1.45.8;
- 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.
 1.44  08-Feb-2011  rmind 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@.
 1.43  22-Dec-2010  matt branches: 1.43.2; 1.43.4;
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.
 1.42  06-Jun-2010  mrg 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
 1.41  21-Oct-2009  rmind branches: 1.41.2; 1.41.4;
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>.
 1.40  17-Oct-2007  garbled branches: 1.40.20;
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.
 1.39  04-Aug-2007  tsutsui branches: 1.39.2;
TAB/space cleanup.
 1.38  04-Aug-2007  tsutsui Add ci_cpuid where it's missing.
 1.37  21-May-2007  tsutsui branches: 1.37.2; 1.37.4; 1.37.8;
Move declarations of m68k common functions
from <machine/cpu.h> to <m68k/m68k.h>.
While here, remove some obsolete function decls.
 1.36  21-May-2007  tsutsui Remove obsolete "extern int want_resched" decls.
 1.35  21-May-2007  tsutsui Adapt rest of m68k ports to yamt-idlelwp. Compile tested only.
 1.34  20-May-2007  mhitch 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.
 1.33  04-Mar-2007  christos branches: 1.33.2; 1.33.4; 1.33.10;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.
 1.32  16-Feb-2007  ad branches: 1.32.2;
Remove spllowersoftclock() and CLKF_BASEPRI(), and always dispatch callouts
via a soft interrupt. In the near future, softclock will be run from process
context.
 1.31  09-Feb-2007  ad Merge newlock2 to head.
 1.30  11-Dec-2005  christos branches: 1.30.20;
merge ktrace-lwp.
 1.29  19-Jan-2005  chs branches: 1.29.8;
de-__P, remove register, ansify.
 1.28  26-Sep-2004  yamt branches: 1.28.4;
don't expose cpu_info to userland.
 1.27  22-Sep-2004  yamt move some per-cpu data definitions to MI place so that they can be modified
without touching all ports. discussed on tech-kern@.
 1.26  04-Jan-2004  jdolecek 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
 1.25  05-Oct-2003  mycroft Minor tweaks to the color framebuffer code -- still don't know what the deal
with the interrupt is.
 1.24  01-Oct-2003  mycroft Some small cleanup -- make the base,limit values vaddr_t, not char*.
Also add some code that attempts to deal with C16_VIDEO interrupts, though it
does not seem to make my color slabs work again.
 1.23  07-Aug-2003  agc Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.
 1.22  18-Jan-2003  thorpej branches: 1.22.2;
Merge the nathanw_sa branch.
 1.21  20-Oct-2002  chs 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.
 1.20  11-Sep-2002  mycroft Comprehensive patches from Christian Limpach:
* Fix problems with the DMA and SCSI drivers.
* Make turbo machines sort of work.
Additional fixes from me:
* Determine if we're a turbo at boot time, by looking at the ROM machine type.
* Set the display size correctly (1120 pixels wide, but padded to 1152 only on
non-turbo machines).
Caveats:
* SCSI doesn't work on the turbo (or at least it blows chunks with no devices
attached).
* Media selection doesn't work on the turbo (the BMAP stuff doesn't exist on
turbo machines).
* The boot block is prone to timing out.
 1.19  14-May-2002  matt Eliminate commons (including many used ones). Clean up variable references.
 1.18  30-May-2001  mrg branches: 1.18.2; 1.18.8;
use _KERNEL_OPT
 1.17  13-May-2001  chs turn on printf format-string checking and -Werror. fix all warnings.
 1.16  12-May-2001  chs switch next68k to ELF. highlight include:
add "%" prefix to register names in assembly code.
change assembly functions to return pointer values in %a0 instead of %d0.
C symbols no longer prepend an underscore, adjust assembly code for this.
32-bit values are now 32-bit aligned instead of 16-bit aligned,
adjust structure packing and padding to override this where necessary.
make EXEC_ELF std, make EXEC_AOUT and COMPAT_AOUT_M68K optional.
use the MI loadfile() instead of several home-grown versions.
 1.15  19-Dec-2000  scw branches: 1.15.2;
Unification of the m68k syscall() function.
 1.14  29-Sep-2000  deberg add support for 12-bit color displays, from Timm Wetzel w/ changes by
me. closes 10741.
 1.13  25-Aug-2000  thorpej 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.
 1.12  26-May-2000  thorpej branches: 1.12.4;
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.
 1.11  10-Aug-1999  thorpej branches: 1.11.2;
Define cpu_number() as discussed on tech-smp.
 1.10  24-Mar-1999  dbj Applied patches from Matt Debergalis <deberg@mit.edu>.
These patches include:
Added framebuffer mapping for color framebuffer to support color wscons
which is coming soon.
Renamed wskbdmap_mfii[ch] to wskbdmap_next[ch]
Changed video to be white on black instead of black on white.
Now handles and discards mouse interrupts.
Video and keyboard is now working on mono machines.
 1.9  26-Feb-1999  is synchronize types, and s/curproc/p/ in one forgotten place
 1.8  26-Feb-1999  is next68k specific part of PR 6152 fix
 1.7  02-Jan-1999  dbj Applied supplied patches from pr port-next68k/6709
add bus_space support for mono framebuffer
 1.6  11-Nov-1998  thorpej Changes to support fork_kthread():
- cpu_set_kpc() now takes void *arg third argument, passed to the
entry point.
- cpu_fork() allows parent to be non-curproc iff parent is proc0.
When forking non-curproc, assume its state has already been saved.
- Adjust various pieces of machine-dependent code to account of all of this.
 1.5  10-Nov-1998  dbj Sync'ed more files and routines with mvme port in prepartion for UVM.
Now use generic m68k cachops everywhere rather than defining them in locore.s
 1.4  31-Aug-1998  dbj Fixed typo in printf bitfields for intrstat register.
 1.3  28-Aug-1998  dbj added a flag to disable the NEXT_SLOT_ID_BMAP for testing the turbo machines
 1.2  05-Jul-1998  dbj Started the esp scsi driver.
Fixed bus_space_handle_t in nextdma device.
Fixed scsi interrupt define.
 1.1  09-Jun-1998  dbj branches: 1.1.1;
Initial revision
 1.1.1.1  09-Jun-1998  dbj Initial import of NetBSD/next68k.
 1.11.2.2  05-Jan-2001  bouyer Sync with HEAD
 1.11.2.1  20-Nov-2000  bouyer 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.
 1.12.4.1  06-Oct-2000  deberg pullup 1.14, approved by thorpej

add support for 12-bit color displays, from Timm Wetzel w/ changes by
me. closes 10741.
 1.15.2.1  21-Jun-2001  nathanw Catch up to -current.
 1.18.8.7  03-Dec-2002  gmcgarry Use cpu_proc_fork().
 1.18.8.6  11-Nov-2002  nathanw Catch up to -current
 1.18.8.5  17-Sep-2002  nathanw Catch up to -current.
 1.18.8.4  20-Jun-2002  nathanw Catch up to -current.
 1.18.8.3  08-Dec-2001  thorpej Add a cpu_proc_fork(), called from uvm_proc_fork(), which takes care
of machine-dependent handling a fork() time (this is different from
forking the actual context in an LWP world). #define it away on
platforms which do not need it.

Problem noted by Gregory McGarry.
 1.18.8.2  18-Nov-2001  scw MD Scheduler Activation bits for Next68k.
Compile-tested only.
 1.18.8.1  30-May-2001  scw file cpu.h was added on branch nathanw_sa on 2001-11-18 18:43:06 +0000
 1.18.2.2  10-Oct-2002  jdolecek sync kqueue with -current; this includes merge of gehenna-devsw branch,
merge of i386 MP branch, and part of autoconf rototil work
 1.18.2.1  23-Jun-2002  jdolecek catch up with -current on kqueue branch
 1.22.2.6  24-Jan-2005  skrll Sync with HEAD.
 1.22.2.5  19-Oct-2004  skrll Sync with HEAD
 1.22.2.4  24-Sep-2004  skrll Sync with HEAD.
 1.22.2.3  21-Sep-2004  skrll Fix the sync with head I botched.
 1.22.2.2  18-Sep-2004  skrll Sync with HEAD.
 1.22.2.1  03-Aug-2004  skrll Sync with HEAD
 1.28.4.1  29-Apr-2005  kent sync with -current
 1.29.8.2  03-Sep-2007  yamt sync with head.
 1.29.8.1  26-Feb-2007  yamt sync with head.
 1.30.20.1  06-Feb-2007  ad Update m68k pasteware.
 1.32.2.1  12-Mar-2007  rmind Sync with HEAD.
 1.33.10.2  03-Oct-2007  garbled Sync with HEAD
 1.33.10.1  22-May-2007  matt Update to HEAD.
 1.33.4.1  11-Jul-2007  mjf Sync with head.
 1.33.2.2  20-Aug-2007  ad Sync with HEAD.
 1.33.2.1  27-May-2007  ad Sync with head.
 1.37.8.1  09-Aug-2007  jmcneill Sync with HEAD.
 1.37.4.1  15-Aug-2007  skrll Sync with HEAD.
 1.37.2.1  07-Aug-2007  matt Sync with HEAD.
 1.39.2.1  06-Nov-2007  matt sync with HEAD
 1.40.20.2  11-Aug-2010  yamt sync with head.
 1.40.20.1  11-Mar-2010  yamt sync with head
 1.41.4.3  31-May-2011  rmind sync with head
 1.41.4.2  05-Mar-2011  rmind sync with head
 1.41.4.1  03-Jul-2010  rmind sync with head
 1.41.2.1  17-Aug-2010  uebayasi Sync with HEAD.
 1.43.4.1  17-Feb-2011  bouyer Sync with HEAD
 1.43.2.1  06-Jun-2011  jruoho Sync with HEAD.
 1.45.8.1  18-Feb-2012  mrg merge to -current.
 1.45.4.2  22-May-2014  yamt 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")
 1.45.4.1  17-Apr-2012  yamt sync with head
 1.46.10.1  18-May-2014  rmind sync with head
 1.46.6.2  03-Dec-2017  jdolecek update from HEAD
 1.46.6.1  20-Aug-2014  tls Rebase to HEAD as of a few days ago.
 1.47.10.1  07-Jan-2017  pgoyette Sync with HEAD. (Note that most of these changes are simply $NetBSD$
tag issues.)
 1.47.6.1  05-Feb-2017  skrll Sync with HEAD
 1.48.16.2  08-Apr-2020  martin Merge changes from current as of 20200406
 1.48.16.1  10-Jun-2019  christos Sync with HEAD
 1.49.4.2  15-Feb-2023  martin Pull up following revision(s) (requested by tsutsui in ticket #1598):

sys/arch/next68k/next68k/nextrom.h: revision 1.13
sys/arch/next68k/dev/nextdisplayvar.h: revision 1.6
sys/arch/next68k/dev/intiovar.h: revision 1.8
sys/arch/next68k/dev/nextcons.c: revision 1.12
sys/arch/next68k/next68k/locore.s: revision 1.69
sys/arch/next68k/dev/nextcons.c: revision 1.13
sys/arch/next68k/dev/nextcons.c: revision 1.14
sys/arch/next68k/include/bus_space.h: revision 1.18
sys/arch/next68k/dev/nextdisplay.c: revision 1.30
sys/arch/next68k/include/bus_space.h: revision 1.19
sys/arch/next68k/stand/boot/boot.c: revision 1.13
sys/arch/next68k/next68k/nextrom.c: revision 1.28
sys/arch/next68k/next68k/nextrom.c: revision 1.29
sys/arch/next68k/next68k/pmap_bootstrap.c: revision 1.46
sys/arch/next68k/next68k/pmap_bootstrap.c: revision 1.47
sys/arch/next68k/include/cpu.h: revision 1.52
sys/arch/next68k/dev/intio.c: revision 1.17 (patch)
sys/arch/next68k/dev/intio.c: revision 1.18 (patch)
sys/arch/next68k/dev/intio.c: revision 1.19 (patch)
sys/arch/next68k/next68k/locore.s: revision 1.72
sys/arch/next68k/stand/boot/version: revision 1.6
sys/arch/next68k/include/bus_space.h: revision 1.21
sys/arch/next68k/include/bus_space.h: revision 1.22
sys/arch/next68k/dev/nextdisplay.c: revision 1.26
sys/arch/next68k/include/bus_space.h: revision 1.23
sys/arch/next68k/dev/nextdisplay.c: revision 1.27
sys/arch/next68k/dev/nextdisplay.c: revision 1.28
sys/arch/next68k/dev/nextdisplay.c: revision 1.29

s/impliment/implement/ in comment.

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.

Misc KNF and cosmetics.

Use proper C99 int types.

Remove trailing spaces and TABs.

Handle NeXT Turbo VRAM regions properly.
Info from Andreas Grabher on port-next68k@:
https://mail-index.netbsd.org/port-next68k/2023/02/06/msg000052.html

Also refactor bus_space_map(9) and fix (unused) bus_space_mmap(9).

Add and check machine type NeXT_CUBE_TURBO (type 8).
Info from Andreas Grabher on port-next68k@.

NeXT Turbo Color doesn't have NEXT_P_C16_CMD_REG.
Info from Andreas Grabher on port-next68k@.

Bump version again to denote NeXT_CUBE_TURBO support.
 1.49.4.1  01-Feb-2023  martin Pull up following revision(s) (requested by tsutsui in ticket #1581):

sys/arch/next68k/next68k/machdep.c: revision 1.117
sys/arch/next68k/dev/esp.c: revision 1.65
sys/arch/next68k/include/cpu.h: revision 1.51
sys/arch/next68k/include/bus_space.h: revision 1.20
sys/arch/next68k/next68k/clock.c: revision 1.13

next68k: Fix delay_divisor value for proper delay(9) on 68040.

next68k: Specify proper constraints for bus_space_read region and multi ops.

These functions write the read data into memory at a specified pointer,
but without the "memory" constraint gcc could optimize out these ops
if the memory is allocated on local stack.

With this fix nextkbd(4) works again.
Should be pulled up to netbsd-10 and netbsd-9.

next68k: Fix silent stall of next68k esp(4) SCSI.

next68k esp(4) driver requires nextdma(4) interrupts at ipl 6
during ncr53c9x_intr() for esp(4) at ipl 3. It worked on netbsd-5
and prior, but on netbsd-5 splbio() was changed from ipl 3 to 6
for SMP support and on netbsd-6 ncr53c9x driver was changed to
use mutex(9) instead of simple_lock(9), so nextdma interrupts
were no longer raised during ncr53c9x interrupt handler.

For now, just call mutex_exit(9) and mutex_enter(9) during
waiting nextdma(4) interrupts in MD esp_dma_intr() handler.

This could be wrong and the interrupt handler for nextdma should
be reorganized, but it just works.

Should be pulled up to netbsd-10 and netbsd-9.
 1.50.26.2  15-Feb-2023  martin Pull up following revision(s) (requested by tsutsui in ticket #88):

sys/arch/next68k/next68k/nextrom.h: revision 1.13
sys/arch/next68k/dev/nextdisplayvar.h: revision 1.6
sys/arch/next68k/dev/intiovar.h: revision 1.8
sys/arch/next68k/dev/nextcons.c: revision 1.12
sys/arch/next68k/next68k/locore.s: revision 1.69
sys/arch/next68k/dev/nextcons.c: revision 1.13
sys/arch/next68k/dev/nextcons.c: revision 1.14
sys/arch/next68k/dev/nextdisplay.c: revision 1.30
sys/arch/next68k/stand/boot/boot.c: revision 1.13
sys/arch/next68k/next68k/nextrom.c: revision 1.28
sys/arch/next68k/next68k/nextrom.c: revision 1.29
sys/arch/next68k/next68k/pmap_bootstrap.c: revision 1.46
sys/arch/next68k/next68k/pmap_bootstrap.c: revision 1.47
sys/arch/next68k/include/cpu.h: revision 1.52
sys/arch/next68k/dev/intio.c: revision 1.17
sys/arch/next68k/dev/intio.c: revision 1.18
sys/arch/next68k/dev/intio.c: revision 1.19
sys/arch/next68k/next68k/locore.s: revision 1.72
sys/arch/next68k/stand/boot/version: revision 1.6
sys/arch/next68k/include/bus_space.h: revision 1.21
sys/arch/next68k/include/bus_space.h: revision 1.22
sys/arch/next68k/dev/nextdisplay.c: revision 1.26
sys/arch/next68k/include/bus_space.h: revision 1.23
sys/arch/next68k/dev/nextdisplay.c: revision 1.27
sys/arch/next68k/dev/nextdisplay.c: revision 1.28
sys/arch/next68k/dev/nextdisplay.c: revision 1.29

Misc KNF and cosmetics.

Use proper C99 int types.

Remove trailing spaces and TABs.

Handle NeXT Turbo VRAM regions properly.
Info from Andreas Grabher on port-next68k@:
https://mail-index.netbsd.org/port-next68k/2023/02/06/msg000052.html

Also refactor bus_space_map(9) and fix (unused) bus_space_mmap(9).

Add and check machine type NeXT_CUBE_TURBO (type 8).
Info from Andreas Grabher on port-next68k@.

NeXT Turbo Color doesn't have NEXT_P_C16_CMD_REG.
Info from Andreas Grabher on port-next68k@.

Bump version again to denote NeXT_CUBE_TURBO support.
 1.50.26.1  01-Feb-2023  martin Pull up following revision(s) (requested by tsutsui in ticket #63):

sys/arch/next68k/next68k/machdep.c: revision 1.117
sys/arch/next68k/dev/esp.c: revision 1.65
sys/arch/next68k/include/cpu.h: revision 1.51
sys/arch/next68k/include/bus_space.h: revision 1.20
sys/arch/next68k/next68k/clock.c: revision 1.13

next68k: Fix delay_divisor value for proper delay(9) on 68040.

next68k: Specify proper constraints for bus_space_read region and multi ops.

These functions write the read data into memory at a specified pointer,
but without the "memory" constraint gcc could optimize out these ops
if the memory is allocated on local stack.

With this fix nextkbd(4) works again.
Should be pulled up to netbsd-10 and netbsd-9.

next68k: Fix silent stall of next68k esp(4) SCSI.

next68k esp(4) driver requires nextdma(4) interrupts at ipl 6
during ncr53c9x_intr() for esp(4) at ipl 3. It worked on netbsd-5
and prior, but on netbsd-5 splbio() was changed from ipl 3 to 6
for SMP support and on netbsd-6 ncr53c9x driver was changed to
use mutex(9) instead of simple_lock(9), so nextdma interrupts
were no longer raised during ncr53c9x interrupt handler.

For now, just call mutex_exit(9) and mutex_enter(9) during
waiting nextdma(4) interrupts in MD esp_dma_intr() handler.

This could be wrong and the interrupt handler for nextdma should
be reorganized, but it just works.

Should be pulled up to netbsd-10 and netbsd-9.

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