Make sigcode.s and sunos_sigcode.s build as their own stand-alone files.

Make compat_13_sigreturn13.s and compat_16_sigreturn14.s build as their
own stand-alone files and G/C the now-empty sigreturn.s.

Build m68k/support.s on its own; don't include it from locore.s

G/C __HAVE_LEGACY_INTRCNT from the sun68k platforms.

Switch the sun68k platforms over to the common m68k interrupt dispatch code.

G/C unreferenced copies of _spl() and _splraise().

We only need one copy of getvbr() and setvbr().

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

Remove getsp(); nothing uses it.

s/paniced/panicked/ and s/borken/broken/ in comments.

Adjust the number of entries in the intrcnt array to match the number
of names in the intrnames list.

branches: 1.67.2;
Remove #undefs against INTERRUPT_SAVEREG and INTERRUPT_RESTOREREG.

They have been defined in <m68k/asm.h> for years.

branches: 1.66.12;
Remove compat_svr4 and compat_svr4_32, as discussed on tech-kern@ recently,
but also as discussed several times in the past.

branches: 1.65.28; 1.65.30;
avoid dup defs, use global macros

branches: 1.64.6; 1.64.10;
Merge m68881_save() and m68881_restore() (using most common mvme68k ones).
All functions are checked by my eyes, and all GENERIC kernels compile.

branches: 1.63.4;
Move spread getsfc() and getdfc() functions into common m68k/support.s.

Note:
- ENTRY_NOPROFILE() is okay since they are used only for debug printf
- they are declared to return int so no need to put a return value into %a0

branches: 1.62.4;
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: 1.61.2; 1.61.4;
Make common kernel module binaries work on both sun3 and sun3x.
Tested on 3/160 (on TME) and (real) 3/80.

XXX: module files can be loaded only on single user?

branches: 1.60.2;
s/cpu_fork/cpu_lwp_fork/ in comment

branches: 1.59.2;
Rename L_ADDR to L_PCB and amend some comments accordingly.

Kill proc0paddr. Use lwp0.l_addr instead.

branches: 1.57.20;
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.

branches: 1.56.6;
Sync with sun3/locore.s rev 1.88:
> Pass a frame pointer to trap() rather than the 'entire frame' trick. Gcc4
> was optimizing away modifications to the frame contents (it's not nice to
> trick gcc). Pass the pointer as the first argument to reduce the number
> of places that would be changed otherwise. Fixes the getcwd regression
> test on most m68k ports.
Fixes MMU fault panic in trap() on sun3x.

This should be pulled up to netbsd-4 too.

branches: 1.55.2; 1.55.4;
Adapt sun68k ports to yamt-idlelwp.
Tested on TME (sun2 and sun3) and 3/80 (sun3x).

branches: 1.54.24; 1.54.30; 1.54.32; 1.54.38; 1.54.40;
merge ktrace-lwp.

branches: 1.53.16;
Remove the local proc_trampoline definition from this file as well.

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

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

branches: 1.51.2;
Merge the nathanw_sa branch.

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: 1.48.6;
ptest_addr() is prototyped (in pmap.c) to return a u_long not a pointer.
Therefore the return value should be in %d0, not %a0.

branches: 1.47.2;
add missing #include "opt_kgdb.h"

Update to reflect that unlike in m68k a.out environments, where the .align
directive is given a log2 argument, .align is given a linear argument in
m68k ELF environments.

branches: 1.45.2;
switch sun3 to ELF. highlight include:
add "%" prefix to register names in assembly code.
change assembly functions to return 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.

split m68k SunOS and SVR4-specific sigcode.s code to sunos_sigcode.s
and svr4_sigcode.s respectively
adjust individual m68k port's locore.s to include new sigcode files if
appropriate

Fix typo in the previous revision. (s/LIdle/Lidle/)

Add a lock around the scheduler, and use it as necessary, including
in the non-MULTIPROCESSOR case (LOCKDEBUG requires it). Scheduler
lock is held upon entry to mi_switch() and cpu_switch(), and
cpu_switch() releases the lock before returning.

Largely from Bill Sommerfeld, with some minor bug fixes and
machine-dependent code hacking from me.

Add a comment on single-processor systems about p_cpu being initialized
by fork1().

Update for qs -> sched_qs change.
Kernel compiles again.

branches: 1.39.2;
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.

Introduce a new process state distinct from SRUN called SONPROC
which indicates that the process is actually running on a
processor. Test against SONPROC as appropriate rather than
combinations of SRUN and curproc. Update all context switch code
to properly set SONPROC when the process becomes the current
process on the CPU.

Fix the problem that single-step tracing of a trap instruction
drops the system into kernel debugger.

branches: 1.36.2; 1.36.4; 1.36.6;
Make sure the branch target of the delay loop is aligned to a cache
half-line (8-byte) boundary. Inspired by a discussion w/ Scott Reynolds.

Include opt_compat_sunos.h

Add COMPAT_SVR4 for m68k.

branches: 1.33.2;
completely remove Mach VM support. all that is left is the all the
header files as UVM still uses (most of) these.

sun3 part of fix for PR 6152

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.

Garbage collect trap #1 and trap #2 handlers; they're moved to
trap_subr.s

Pull in opt_compat_netbsd.h

Adjust for the new "reaper" kernel thread: do not free the vmspace and
u-area in machine-dependent code. Instead, call exit2() to schedule
the reaper to free them for us, once it is safe to do so (i.e. we are
no longer running on the dead proc's vmspace and stack).

First cut at UVM support. Compiles, but not tested yet.

Merge arch/sun3x into arch/sun3

branches: 1.25.4;
Separate pmap_activate() from _pmap_switch(), so the latter can remain
equivalent to what locore.s:cpu_switch does with in-line assembly when
PMAP_DEBUG is not defined. Also do splimp/splx in pmap_activate.

Use MONEND instead of DVMA_SPACE_START in the "DDB convenience" symbols.

Make pmap_activate() take a proc *.

MONSTART/monstart symbol

Add non-inline version of _splraise.

Eliminate references to vmspace.vm_pmap
(also fix some comments).

Wrap all label references with new macros in m68k/asm.h in preperation
for ELF switchover. (eventually)

Rename "Idle" to "_Idle" so clock.c can reference it.

Adjust for <m68k/m68k/trap_subr.s>

Use common m68k sigcode.

Use <m68k/m68k/proc_subr.s>

In-tree GNU ``as'' does not know of 'pmove <reg>,tt0' instruction. Changed
instances of this instruction to hardcoded opcode statements. Thanks to
jthorpe for pointing this out.

s/fpu_type/fputype/g

Use <m68k/m68k/support.s>

Sync with sun3 (Trap 1,2,15 handlers)

Add ptest_addr

Added the '@' symbols that GAS needs for address register indirect addressing
statements that are used when PMAP_DEBUG is undefined.

Reinstate call to pmap_activate() for now, because it is helpful
for debugging the pmap code. The in-line version of the same is
still here and will be used if PMAP_DEBUG is not defined.

Add a few more coments. (i.e. why init a6=0)

Sync with sun3.

branches: 1.5.2;
Remove an un-true comment.

Load the root pointer using VM_PMAP_MMUCRP
Also rename nodb_trap to _nodb_trap

Fix a comment (PCB_MMUCTX is a virtual address).

Adapt to rename of pcb_mmuctx to pcb_mmucrp, and corrected
prototype of loadcrp(), which kills some bogus type casts.

branches: 1.1.1;
Initial revision

G/C __HAVE_LEGACY_INTRCNT from the sun68k platforms.

Switch the sun68k platforms over to the common m68k interrupt dispatch code.

G/C unreferenced copies of _spl() and _splraise().

We only need one copy of getvbr() and setvbr().

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

Remove getsp(); nothing uses it.

s/paniced/panicked/ and s/borken/broken/ in comments.

Adjust the number of entries in the intrcnt array to match the number
of names in the intrnames list.

branches: 1.67.2;
Remove #undefs against INTERRUPT_SAVEREG and INTERRUPT_RESTOREREG.

They have been defined in <m68k/asm.h> for years.

branches: 1.66.12;
Remove compat_svr4 and compat_svr4_32, as discussed on tech-kern@ recently,
but also as discussed several times in the past.

branches: 1.65.28; 1.65.30;
avoid dup defs, use global macros

branches: 1.64.6; 1.64.10;
Merge m68881_save() and m68881_restore() (using most common mvme68k ones).
All functions are checked by my eyes, and all GENERIC kernels compile.

branches: 1.63.4;
Move spread getsfc() and getdfc() functions into common m68k/support.s.

Note:
- ENTRY_NOPROFILE() is okay since they are used only for debug printf
- they are declared to return int so no need to put a return value into %a0

branches: 1.62.4;
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: 1.61.2; 1.61.4;
Make common kernel module binaries work on both sun3 and sun3x.
Tested on 3/160 (on TME) and (real) 3/80.

XXX: module files can be loaded only on single user?

branches: 1.60.2;
s/cpu_fork/cpu_lwp_fork/ in comment

branches: 1.59.2;
Rename L_ADDR to L_PCB and amend some comments accordingly.

Kill proc0paddr. Use lwp0.l_addr instead.

branches: 1.57.20;
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.

branches: 1.56.6;
Sync with sun3/locore.s rev 1.88:
> Pass a frame pointer to trap() rather than the 'entire frame' trick. Gcc4
> was optimizing away modifications to the frame contents (it's not nice to
> trick gcc). Pass the pointer as the first argument to reduce the number
> of places that would be changed otherwise. Fixes the getcwd regression
> test on most m68k ports.
Fixes MMU fault panic in trap() on sun3x.

This should be pulled up to netbsd-4 too.

branches: 1.55.2; 1.55.4;
Adapt sun68k ports to yamt-idlelwp.
Tested on TME (sun2 and sun3) and 3/80 (sun3x).

branches: 1.54.24; 1.54.30; 1.54.32; 1.54.38; 1.54.40;
merge ktrace-lwp.

branches: 1.53.16;
Remove the local proc_trampoline definition from this file as well.

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

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

branches: 1.51.2;
Merge the nathanw_sa branch.

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: 1.48.6;
ptest_addr() is prototyped (in pmap.c) to return a u_long not a pointer.
Therefore the return value should be in %d0, not %a0.

branches: 1.47.2;
add missing #include "opt_kgdb.h"

Update to reflect that unlike in m68k a.out environments, where the .align
directive is given a log2 argument, .align is given a linear argument in
m68k ELF environments.

branches: 1.45.2;
switch sun3 to ELF. highlight include:
add "%" prefix to register names in assembly code.
change assembly functions to return 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.

split m68k SunOS and SVR4-specific sigcode.s code to sunos_sigcode.s
and svr4_sigcode.s respectively
adjust individual m68k port's locore.s to include new sigcode files if
appropriate

Fix typo in the previous revision. (s/LIdle/Lidle/)

Add a lock around the scheduler, and use it as necessary, including
in the non-MULTIPROCESSOR case (LOCKDEBUG requires it). Scheduler
lock is held upon entry to mi_switch() and cpu_switch(), and
cpu_switch() releases the lock before returning.

Largely from Bill Sommerfeld, with some minor bug fixes and
machine-dependent code hacking from me.

Add a comment on single-processor systems about p_cpu being initialized
by fork1().

Update for qs -> sched_qs change.
Kernel compiles again.

branches: 1.39.2;
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.

Introduce a new process state distinct from SRUN called SONPROC
which indicates that the process is actually running on a
processor. Test against SONPROC as appropriate rather than
combinations of SRUN and curproc. Update all context switch code
to properly set SONPROC when the process becomes the current
process on the CPU.

Fix the problem that single-step tracing of a trap instruction
drops the system into kernel debugger.

branches: 1.36.2; 1.36.4; 1.36.6;
Make sure the branch target of the delay loop is aligned to a cache
half-line (8-byte) boundary. Inspired by a discussion w/ Scott Reynolds.

Include opt_compat_sunos.h

Add COMPAT_SVR4 for m68k.

branches: 1.33.2;
completely remove Mach VM support. all that is left is the all the
header files as UVM still uses (most of) these.

sun3 part of fix for PR 6152

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.

Garbage collect trap #1 and trap #2 handlers; they're moved to
trap_subr.s

Pull in opt_compat_netbsd.h

Adjust for the new "reaper" kernel thread: do not free the vmspace and
u-area in machine-dependent code. Instead, call exit2() to schedule
the reaper to free them for us, once it is safe to do so (i.e. we are
no longer running on the dead proc's vmspace and stack).

First cut at UVM support. Compiles, but not tested yet.

Merge arch/sun3x into arch/sun3

branches: 1.25.4;
Separate pmap_activate() from _pmap_switch(), so the latter can remain
equivalent to what locore.s:cpu_switch does with in-line assembly when
PMAP_DEBUG is not defined. Also do splimp/splx in pmap_activate.

Use MONEND instead of DVMA_SPACE_START in the "DDB convenience" symbols.

Make pmap_activate() take a proc *.

MONSTART/monstart symbol

Add non-inline version of _splraise.

Eliminate references to vmspace.vm_pmap
(also fix some comments).

Wrap all label references with new macros in m68k/asm.h in preperation
for ELF switchover. (eventually)

Rename "Idle" to "_Idle" so clock.c can reference it.

Adjust for <m68k/m68k/trap_subr.s>

Use common m68k sigcode.

Use <m68k/m68k/proc_subr.s>

In-tree GNU ``as'' does not know of 'pmove <reg>,tt0' instruction. Changed
instances of this instruction to hardcoded opcode statements. Thanks to
jthorpe for pointing this out.

s/fpu_type/fputype/g

Use <m68k/m68k/support.s>

Sync with sun3 (Trap 1,2,15 handlers)

Add ptest_addr

Added the '@' symbols that GAS needs for address register indirect addressing
statements that are used when PMAP_DEBUG is undefined.

Reinstate call to pmap_activate() for now, because it is helpful
for debugging the pmap code. The in-line version of the same is
still here and will be used if PMAP_DEBUG is not defined.

Add a few more coments. (i.e. why init a6=0)

Sync with sun3.

branches: 1.5.2;
Remove an un-true comment.

Load the root pointer using VM_PMAP_MMUCRP
Also rename nodb_trap to _nodb_trap

Fix a comment (PCB_MMUCTX is a virtual address).

Adapt to rename of pcb_mmuctx to pcb_mmucrp, and corrected
prototype of loadcrp(), which kills some bogus type casts.

branches: 1.1.1;
Initial revision

G/C unreferenced copies of _spl() and _splraise().

We only need one copy of getvbr() and setvbr().

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

Remove getsp(); nothing uses it.

s/paniced/panicked/ and s/borken/broken/ in comments.

Adjust the number of entries in the intrcnt array to match the number
of names in the intrnames list.

branches: 1.67.2;
Remove #undefs against INTERRUPT_SAVEREG and INTERRUPT_RESTOREREG.

They have been defined in <m68k/asm.h> for years.

branches: 1.66.12;
Remove compat_svr4 and compat_svr4_32, as discussed on tech-kern@ recently,
but also as discussed several times in the past.

branches: 1.65.28; 1.65.30;
avoid dup defs, use global macros

branches: 1.64.6; 1.64.10;
Merge m68881_save() and m68881_restore() (using most common mvme68k ones).
All functions are checked by my eyes, and all GENERIC kernels compile.

branches: 1.63.4;
Move spread getsfc() and getdfc() functions into common m68k/support.s.

Note:
- ENTRY_NOPROFILE() is okay since they are used only for debug printf
- they are declared to return int so no need to put a return value into %a0

branches: 1.62.4;
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: 1.61.2; 1.61.4;
Make common kernel module binaries work on both sun3 and sun3x.
Tested on 3/160 (on TME) and (real) 3/80.

XXX: module files can be loaded only on single user?

branches: 1.60.2;
s/cpu_fork/cpu_lwp_fork/ in comment

branches: 1.59.2;
Rename L_ADDR to L_PCB and amend some comments accordingly.

Kill proc0paddr. Use lwp0.l_addr instead.

branches: 1.57.20;
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.

branches: 1.56.6;
Sync with sun3/locore.s rev 1.88:
> Pass a frame pointer to trap() rather than the 'entire frame' trick. Gcc4
> was optimizing away modifications to the frame contents (it's not nice to
> trick gcc). Pass the pointer as the first argument to reduce the number
> of places that would be changed otherwise. Fixes the getcwd regression
> test on most m68k ports.
Fixes MMU fault panic in trap() on sun3x.

This should be pulled up to netbsd-4 too.

branches: 1.55.2; 1.55.4;
Adapt sun68k ports to yamt-idlelwp.
Tested on TME (sun2 and sun3) and 3/80 (sun3x).

branches: 1.54.24; 1.54.30; 1.54.32; 1.54.38; 1.54.40;
merge ktrace-lwp.

branches: 1.53.16;
Remove the local proc_trampoline definition from this file as well.

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

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

branches: 1.51.2;
Merge the nathanw_sa branch.

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: 1.48.6;
ptest_addr() is prototyped (in pmap.c) to return a u_long not a pointer.
Therefore the return value should be in %d0, not %a0.

branches: 1.47.2;
add missing #include "opt_kgdb.h"

Update to reflect that unlike in m68k a.out environments, where the .align
directive is given a log2 argument, .align is given a linear argument in
m68k ELF environments.

branches: 1.45.2;
switch sun3 to ELF. highlight include:
add "%" prefix to register names in assembly code.
change assembly functions to return 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.

split m68k SunOS and SVR4-specific sigcode.s code to sunos_sigcode.s
and svr4_sigcode.s respectively
adjust individual m68k port's locore.s to include new sigcode files if
appropriate

Fix typo in the previous revision. (s/LIdle/Lidle/)

Add a lock around the scheduler, and use it as necessary, including
in the non-MULTIPROCESSOR case (LOCKDEBUG requires it). Scheduler
lock is held upon entry to mi_switch() and cpu_switch(), and
cpu_switch() releases the lock before returning.

Largely from Bill Sommerfeld, with some minor bug fixes and
machine-dependent code hacking from me.

Add a comment on single-processor systems about p_cpu being initialized
by fork1().

Update for qs -> sched_qs change.
Kernel compiles again.

branches: 1.39.2;
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.

Introduce a new process state distinct from SRUN called SONPROC
which indicates that the process is actually running on a
processor. Test against SONPROC as appropriate rather than
combinations of SRUN and curproc. Update all context switch code
to properly set SONPROC when the process becomes the current
process on the CPU.

Fix the problem that single-step tracing of a trap instruction
drops the system into kernel debugger.

branches: 1.36.2; 1.36.4; 1.36.6;
Make sure the branch target of the delay loop is aligned to a cache
half-line (8-byte) boundary. Inspired by a discussion w/ Scott Reynolds.

Include opt_compat_sunos.h

Add COMPAT_SVR4 for m68k.

branches: 1.33.2;
completely remove Mach VM support. all that is left is the all the
header files as UVM still uses (most of) these.

sun3 part of fix for PR 6152

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.

Garbage collect trap #1 and trap #2 handlers; they're moved to
trap_subr.s

Pull in opt_compat_netbsd.h

Adjust for the new "reaper" kernel thread: do not free the vmspace and
u-area in machine-dependent code. Instead, call exit2() to schedule
the reaper to free them for us, once it is safe to do so (i.e. we are
no longer running on the dead proc's vmspace and stack).

First cut at UVM support. Compiles, but not tested yet.

Merge arch/sun3x into arch/sun3

branches: 1.25.4;
Separate pmap_activate() from _pmap_switch(), so the latter can remain
equivalent to what locore.s:cpu_switch does with in-line assembly when
PMAP_DEBUG is not defined. Also do splimp/splx in pmap_activate.

Use MONEND instead of DVMA_SPACE_START in the "DDB convenience" symbols.

Make pmap_activate() take a proc *.

MONSTART/monstart symbol

Add non-inline version of _splraise.

Eliminate references to vmspace.vm_pmap
(also fix some comments).

Wrap all label references with new macros in m68k/asm.h in preperation
for ELF switchover. (eventually)

Rename "Idle" to "_Idle" so clock.c can reference it.

Adjust for <m68k/m68k/trap_subr.s>

Use common m68k sigcode.

Use <m68k/m68k/proc_subr.s>

In-tree GNU ``as'' does not know of 'pmove <reg>,tt0' instruction. Changed
instances of this instruction to hardcoded opcode statements. Thanks to
jthorpe for pointing this out.

s/fpu_type/fputype/g

Use <m68k/m68k/support.s>

Sync with sun3 (Trap 1,2,15 handlers)

Add ptest_addr

Added the '@' symbols that GAS needs for address register indirect addressing
statements that are used when PMAP_DEBUG is undefined.

Reinstate call to pmap_activate() for now, because it is helpful
for debugging the pmap code. The in-line version of the same is
still here and will be used if PMAP_DEBUG is not defined.

Add a few more coments. (i.e. why init a6=0)

Sync with sun3.

branches: 1.5.2;
Remove an un-true comment.

Load the root pointer using VM_PMAP_MMUCRP
Also rename nodb_trap to _nodb_trap

Fix a comment (PCB_MMUCTX is a virtual address).

Adapt to rename of pcb_mmuctx to pcb_mmucrp, and corrected
prototype of loadcrp(), which kills some bogus type casts.

branches: 1.1.1;
Initial revision

s/paniced/panicked/ and s/borken/broken/ in comments.

Adjust the number of entries in the intrcnt array to match the number
of names in the intrnames list.

branches: 1.67.2;
Remove #undefs against INTERRUPT_SAVEREG and INTERRUPT_RESTOREREG.

They have been defined in <m68k/asm.h> for years.

branches: 1.66.12;
Remove compat_svr4 and compat_svr4_32, as discussed on tech-kern@ recently,
but also as discussed several times in the past.

branches: 1.65.28; 1.65.30;
avoid dup defs, use global macros

branches: 1.64.6; 1.64.10;
Merge m68881_save() and m68881_restore() (using most common mvme68k ones).
All functions are checked by my eyes, and all GENERIC kernels compile.

branches: 1.63.4;
Move spread getsfc() and getdfc() functions into common m68k/support.s.

Note:
- ENTRY_NOPROFILE() is okay since they are used only for debug printf
- they are declared to return int so no need to put a return value into %a0

branches: 1.62.4;
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: 1.61.2; 1.61.4;
Make common kernel module binaries work on both sun3 and sun3x.
Tested on 3/160 (on TME) and (real) 3/80.

XXX: module files can be loaded only on single user?

branches: 1.60.2;
s/cpu_fork/cpu_lwp_fork/ in comment

branches: 1.59.2;
Rename L_ADDR to L_PCB and amend some comments accordingly.

Kill proc0paddr. Use lwp0.l_addr instead.

branches: 1.57.20;
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.

branches: 1.56.6;
Sync with sun3/locore.s rev 1.88:
> Pass a frame pointer to trap() rather than the 'entire frame' trick. Gcc4
> was optimizing away modifications to the frame contents (it's not nice to
> trick gcc). Pass the pointer as the first argument to reduce the number
> of places that would be changed otherwise. Fixes the getcwd regression
> test on most m68k ports.
Fixes MMU fault panic in trap() on sun3x.

This should be pulled up to netbsd-4 too.

branches: 1.55.2; 1.55.4;
Adapt sun68k ports to yamt-idlelwp.
Tested on TME (sun2 and sun3) and 3/80 (sun3x).

branches: 1.54.24; 1.54.30; 1.54.32; 1.54.38; 1.54.40;
merge ktrace-lwp.

branches: 1.53.16;
Remove the local proc_trampoline definition from this file as well.

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

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

branches: 1.51.2;
Merge the nathanw_sa branch.

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: 1.48.6;
ptest_addr() is prototyped (in pmap.c) to return a u_long not a pointer.
Therefore the return value should be in %d0, not %a0.

branches: 1.47.2;
add missing #include "opt_kgdb.h"

Update to reflect that unlike in m68k a.out environments, where the .align
directive is given a log2 argument, .align is given a linear argument in
m68k ELF environments.

branches: 1.45.2;
switch sun3 to ELF. highlight include:
add "%" prefix to register names in assembly code.
change assembly functions to return 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.

split m68k SunOS and SVR4-specific sigcode.s code to sunos_sigcode.s
and svr4_sigcode.s respectively
adjust individual m68k port's locore.s to include new sigcode files if
appropriate

Fix typo in the previous revision. (s/LIdle/Lidle/)

Add a lock around the scheduler, and use it as necessary, including
in the non-MULTIPROCESSOR case (LOCKDEBUG requires it). Scheduler
lock is held upon entry to mi_switch() and cpu_switch(), and
cpu_switch() releases the lock before returning.

Largely from Bill Sommerfeld, with some minor bug fixes and
machine-dependent code hacking from me.

Add a comment on single-processor systems about p_cpu being initialized
by fork1().

Update for qs -> sched_qs change.
Kernel compiles again.

branches: 1.39.2;
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.

Introduce a new process state distinct from SRUN called SONPROC
which indicates that the process is actually running on a
processor. Test against SONPROC as appropriate rather than
combinations of SRUN and curproc. Update all context switch code
to properly set SONPROC when the process becomes the current
process on the CPU.

Fix the problem that single-step tracing of a trap instruction
drops the system into kernel debugger.

branches: 1.36.2; 1.36.4; 1.36.6;
Make sure the branch target of the delay loop is aligned to a cache
half-line (8-byte) boundary. Inspired by a discussion w/ Scott Reynolds.

Include opt_compat_sunos.h

Add COMPAT_SVR4 for m68k.

branches: 1.33.2;
completely remove Mach VM support. all that is left is the all the
header files as UVM still uses (most of) these.

sun3 part of fix for PR 6152

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.

Garbage collect trap #1 and trap #2 handlers; they're moved to
trap_subr.s

Pull in opt_compat_netbsd.h

Adjust for the new "reaper" kernel thread: do not free the vmspace and
u-area in machine-dependent code. Instead, call exit2() to schedule
the reaper to free them for us, once it is safe to do so (i.e. we are
no longer running on the dead proc's vmspace and stack).

First cut at UVM support. Compiles, but not tested yet.

Merge arch/sun3x into arch/sun3

branches: 1.25.4;
Separate pmap_activate() from _pmap_switch(), so the latter can remain
equivalent to what locore.s:cpu_switch does with in-line assembly when
PMAP_DEBUG is not defined. Also do splimp/splx in pmap_activate.

Use MONEND instead of DVMA_SPACE_START in the "DDB convenience" symbols.

Make pmap_activate() take a proc *.

MONSTART/monstart symbol

Add non-inline version of _splraise.

Eliminate references to vmspace.vm_pmap
(also fix some comments).

Wrap all label references with new macros in m68k/asm.h in preperation
for ELF switchover. (eventually)

Rename "Idle" to "_Idle" so clock.c can reference it.

Adjust for <m68k/m68k/trap_subr.s>

Use common m68k sigcode.

Use <m68k/m68k/proc_subr.s>

In-tree GNU ``as'' does not know of 'pmove <reg>,tt0' instruction. Changed
instances of this instruction to hardcoded opcode statements. Thanks to
jthorpe for pointing this out.

s/fpu_type/fputype/g

Use <m68k/m68k/support.s>

Sync with sun3 (Trap 1,2,15 handlers)

Add ptest_addr

Added the '@' symbols that GAS needs for address register indirect addressing
statements that are used when PMAP_DEBUG is undefined.

Reinstate call to pmap_activate() for now, because it is helpful
for debugging the pmap code. The in-line version of the same is
still here and will be used if PMAP_DEBUG is not defined.

Add a few more coments. (i.e. why init a6=0)

Sync with sun3.

branches: 1.5.2;
Remove an un-true comment.

Load the root pointer using VM_PMAP_MMUCRP
Also rename nodb_trap to _nodb_trap

Fix a comment (PCB_MMUCTX is a virtual address).

Adapt to rename of pcb_mmuctx to pcb_mmucrp, and corrected
prototype of loadcrp(), which kills some bogus type casts.

branches: 1.1.1;
Initial revision

Adjust the number of entries in the intrcnt array to match the number
of names in the intrnames list.

Remove #undefs against INTERRUPT_SAVEREG and INTERRUPT_RESTOREREG.

They have been defined in <m68k/asm.h> for years.

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

branches: 1.65.28; 1.65.30;
avoid dup defs, use global macros

branches: 1.64.6; 1.64.10;
Merge m68881_save() and m68881_restore() (using most common mvme68k ones).
All functions are checked by my eyes, and all GENERIC kernels compile.

branches: 1.63.4;
Move spread getsfc() and getdfc() functions into common m68k/support.s.

Note:
- ENTRY_NOPROFILE() is okay since they are used only for debug printf
- they are declared to return int so no need to put a return value into %a0

branches: 1.62.4;
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: 1.61.2; 1.61.4;
Make common kernel module binaries work on both sun3 and sun3x.
Tested on 3/160 (on TME) and (real) 3/80.

XXX: module files can be loaded only on single user?

branches: 1.60.2;
s/cpu_fork/cpu_lwp_fork/ in comment

branches: 1.59.2;
Rename L_ADDR to L_PCB and amend some comments accordingly.

Kill proc0paddr. Use lwp0.l_addr instead.

branches: 1.57.20;
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.

branches: 1.56.6;
Sync with sun3/locore.s rev 1.88:
> Pass a frame pointer to trap() rather than the 'entire frame' trick. Gcc4
> was optimizing away modifications to the frame contents (it's not nice to
> trick gcc). Pass the pointer as the first argument to reduce the number
> of places that would be changed otherwise. Fixes the getcwd regression
> test on most m68k ports.
Fixes MMU fault panic in trap() on sun3x.

This should be pulled up to netbsd-4 too.

branches: 1.55.2; 1.55.4;
Adapt sun68k ports to yamt-idlelwp.
Tested on TME (sun2 and sun3) and 3/80 (sun3x).

branches: 1.54.24; 1.54.30; 1.54.32; 1.54.38; 1.54.40;
merge ktrace-lwp.

branches: 1.53.16;
Remove the local proc_trampoline definition from this file as well.

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

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

branches: 1.51.2;
Merge the nathanw_sa branch.

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: 1.48.6;
ptest_addr() is prototyped (in pmap.c) to return a u_long not a pointer.
Therefore the return value should be in %d0, not %a0.

branches: 1.47.2;
add missing #include "opt_kgdb.h"

Update to reflect that unlike in m68k a.out environments, where the .align
directive is given a log2 argument, .align is given a linear argument in
m68k ELF environments.

branches: 1.45.2;
switch sun3 to ELF. highlight include:
add "%" prefix to register names in assembly code.
change assembly functions to return 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.

split m68k SunOS and SVR4-specific sigcode.s code to sunos_sigcode.s
and svr4_sigcode.s respectively
adjust individual m68k port's locore.s to include new sigcode files if
appropriate

Fix typo in the previous revision. (s/LIdle/Lidle/)

Add a lock around the scheduler, and use it as necessary, including
in the non-MULTIPROCESSOR case (LOCKDEBUG requires it). Scheduler
lock is held upon entry to mi_switch() and cpu_switch(), and
cpu_switch() releases the lock before returning.

Largely from Bill Sommerfeld, with some minor bug fixes and
machine-dependent code hacking from me.

Add a comment on single-processor systems about p_cpu being initialized
by fork1().

Update for qs -> sched_qs change.
Kernel compiles again.

branches: 1.39.2;
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.

Introduce a new process state distinct from SRUN called SONPROC
which indicates that the process is actually running on a
processor. Test against SONPROC as appropriate rather than
combinations of SRUN and curproc. Update all context switch code
to properly set SONPROC when the process becomes the current
process on the CPU.

Fix the problem that single-step tracing of a trap instruction
drops the system into kernel debugger.

branches: 1.36.2; 1.36.4; 1.36.6;
Make sure the branch target of the delay loop is aligned to a cache
half-line (8-byte) boundary. Inspired by a discussion w/ Scott Reynolds.

Include opt_compat_sunos.h

Add COMPAT_SVR4 for m68k.

branches: 1.33.2;
completely remove Mach VM support. all that is left is the all the
header files as UVM still uses (most of) these.

sun3 part of fix for PR 6152

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.

Garbage collect trap #1 and trap #2 handlers; they're moved to
trap_subr.s

Pull in opt_compat_netbsd.h

Adjust for the new "reaper" kernel thread: do not free the vmspace and
u-area in machine-dependent code. Instead, call exit2() to schedule
the reaper to free them for us, once it is safe to do so (i.e. we are
no longer running on the dead proc's vmspace and stack).

First cut at UVM support. Compiles, but not tested yet.

Merge arch/sun3x into arch/sun3

branches: 1.25.4;
Separate pmap_activate() from _pmap_switch(), so the latter can remain
equivalent to what locore.s:cpu_switch does with in-line assembly when
PMAP_DEBUG is not defined. Also do splimp/splx in pmap_activate.

Use MONEND instead of DVMA_SPACE_START in the "DDB convenience" symbols.

Make pmap_activate() take a proc *.

MONSTART/monstart symbol

Add non-inline version of _splraise.

Eliminate references to vmspace.vm_pmap
(also fix some comments).

Wrap all label references with new macros in m68k/asm.h in preperation
for ELF switchover. (eventually)

Rename "Idle" to "_Idle" so clock.c can reference it.

Adjust for <m68k/m68k/trap_subr.s>

Use common m68k sigcode.

Use <m68k/m68k/proc_subr.s>

In-tree GNU ``as'' does not know of 'pmove <reg>,tt0' instruction. Changed
instances of this instruction to hardcoded opcode statements. Thanks to
jthorpe for pointing this out.

s/fpu_type/fputype/g

Use <m68k/m68k/support.s>

Sync with sun3 (Trap 1,2,15 handlers)

Add ptest_addr

Added the '@' symbols that GAS needs for address register indirect addressing
statements that are used when PMAP_DEBUG is undefined.

Reinstate call to pmap_activate() for now, because it is helpful
for debugging the pmap code. The in-line version of the same is
still here and will be used if PMAP_DEBUG is not defined.

Add a few more coments. (i.e. why init a6=0)

Sync with sun3.

branches: 1.5.2;
Remove an un-true comment.

Load the root pointer using VM_PMAP_MMUCRP
Also rename nodb_trap to _nodb_trap

Fix a comment (PCB_MMUCTX is a virtual address).

Adapt to rename of pcb_mmuctx to pcb_mmucrp, and corrected
prototype of loadcrp(), which kills some bogus type casts.

branches: 1.1.1;
Initial revision

Remove #undefs against INTERRUPT_SAVEREG and INTERRUPT_RESTOREREG.

They have been defined in <m68k/asm.h> for years.

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

branches: 1.65.28; 1.65.30;
avoid dup defs, use global macros

branches: 1.64.6; 1.64.10;
Merge m68881_save() and m68881_restore() (using most common mvme68k ones).
All functions are checked by my eyes, and all GENERIC kernels compile.

branches: 1.63.4;
Move spread getsfc() and getdfc() functions into common m68k/support.s.

Note:
- ENTRY_NOPROFILE() is okay since they are used only for debug printf
- they are declared to return int so no need to put a return value into %a0

branches: 1.62.4;
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: 1.61.2; 1.61.4;
Make common kernel module binaries work on both sun3 and sun3x.
Tested on 3/160 (on TME) and (real) 3/80.

XXX: module files can be loaded only on single user?

branches: 1.60.2;
s/cpu_fork/cpu_lwp_fork/ in comment

branches: 1.59.2;
Rename L_ADDR to L_PCB and amend some comments accordingly.

Kill proc0paddr. Use lwp0.l_addr instead.

branches: 1.57.20;
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.

branches: 1.56.6;
Sync with sun3/locore.s rev 1.88:
> Pass a frame pointer to trap() rather than the 'entire frame' trick. Gcc4
> was optimizing away modifications to the frame contents (it's not nice to
> trick gcc). Pass the pointer as the first argument to reduce the number
> of places that would be changed otherwise. Fixes the getcwd regression
> test on most m68k ports.
Fixes MMU fault panic in trap() on sun3x.

This should be pulled up to netbsd-4 too.

branches: 1.55.2; 1.55.4;
Adapt sun68k ports to yamt-idlelwp.
Tested on TME (sun2 and sun3) and 3/80 (sun3x).

branches: 1.54.24; 1.54.30; 1.54.32; 1.54.38; 1.54.40;
merge ktrace-lwp.

branches: 1.53.16;
Remove the local proc_trampoline definition from this file as well.

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

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

branches: 1.51.2;
Merge the nathanw_sa branch.

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: 1.48.6;
ptest_addr() is prototyped (in pmap.c) to return a u_long not a pointer.
Therefore the return value should be in %d0, not %a0.

branches: 1.47.2;
add missing #include "opt_kgdb.h"

Update to reflect that unlike in m68k a.out environments, where the .align
directive is given a log2 argument, .align is given a linear argument in
m68k ELF environments.

branches: 1.45.2;
switch sun3 to ELF. highlight include:
add "%" prefix to register names in assembly code.
change assembly functions to return 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.

split m68k SunOS and SVR4-specific sigcode.s code to sunos_sigcode.s
and svr4_sigcode.s respectively
adjust individual m68k port's locore.s to include new sigcode files if
appropriate

Fix typo in the previous revision. (s/LIdle/Lidle/)

Add a lock around the scheduler, and use it as necessary, including
in the non-MULTIPROCESSOR case (LOCKDEBUG requires it). Scheduler
lock is held upon entry to mi_switch() and cpu_switch(), and
cpu_switch() releases the lock before returning.

Largely from Bill Sommerfeld, with some minor bug fixes and
machine-dependent code hacking from me.

Add a comment on single-processor systems about p_cpu being initialized
by fork1().

Update for qs -> sched_qs change.
Kernel compiles again.

branches: 1.39.2;
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.

Introduce a new process state distinct from SRUN called SONPROC
which indicates that the process is actually running on a
processor. Test against SONPROC as appropriate rather than
combinations of SRUN and curproc. Update all context switch code
to properly set SONPROC when the process becomes the current
process on the CPU.

Fix the problem that single-step tracing of a trap instruction
drops the system into kernel debugger.

branches: 1.36.2; 1.36.4; 1.36.6;
Make sure the branch target of the delay loop is aligned to a cache
half-line (8-byte) boundary. Inspired by a discussion w/ Scott Reynolds.

Include opt_compat_sunos.h

Add COMPAT_SVR4 for m68k.

branches: 1.33.2;
completely remove Mach VM support. all that is left is the all the
header files as UVM still uses (most of) these.

sun3 part of fix for PR 6152

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.

Garbage collect trap #1 and trap #2 handlers; they're moved to
trap_subr.s

Pull in opt_compat_netbsd.h

Adjust for the new "reaper" kernel thread: do not free the vmspace and
u-area in machine-dependent code. Instead, call exit2() to schedule
the reaper to free them for us, once it is safe to do so (i.e. we are
no longer running on the dead proc's vmspace and stack).

First cut at UVM support. Compiles, but not tested yet.

Merge arch/sun3x into arch/sun3

branches: 1.25.4;
Separate pmap_activate() from _pmap_switch(), so the latter can remain
equivalent to what locore.s:cpu_switch does with in-line assembly when
PMAP_DEBUG is not defined. Also do splimp/splx in pmap_activate.

Use MONEND instead of DVMA_SPACE_START in the "DDB convenience" symbols.

Make pmap_activate() take a proc *.

MONSTART/monstart symbol

Add non-inline version of _splraise.

Eliminate references to vmspace.vm_pmap
(also fix some comments).

Wrap all label references with new macros in m68k/asm.h in preperation
for ELF switchover. (eventually)

Rename "Idle" to "_Idle" so clock.c can reference it.

Adjust for <m68k/m68k/trap_subr.s>

Use common m68k sigcode.

Use <m68k/m68k/proc_subr.s>

In-tree GNU ``as'' does not know of 'pmove <reg>,tt0' instruction. Changed
instances of this instruction to hardcoded opcode statements. Thanks to
jthorpe for pointing this out.

s/fpu_type/fputype/g

Use <m68k/m68k/support.s>

Sync with sun3 (Trap 1,2,15 handlers)

Add ptest_addr

Added the '@' symbols that GAS needs for address register indirect addressing
statements that are used when PMAP_DEBUG is undefined.

Reinstate call to pmap_activate() for now, because it is helpful
for debugging the pmap code. The in-line version of the same is
still here and will be used if PMAP_DEBUG is not defined.

Add a few more coments. (i.e. why init a6=0)

Sync with sun3.

branches: 1.5.2;
Remove an un-true comment.

Load the root pointer using VM_PMAP_MMUCRP
Also rename nodb_trap to _nodb_trap