CVS log for src/sys/arch/atari/atari/locore.s

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Request diff between arbitrary revisions

Keyword substitution: kv
Default branch: MAIN

Pull up following revision(s) (requested by rin in ticket #724
to fix build fallout on the branch):

	sys/arch/m68k/m68k/compat_16_sigreturn14.s: revision 1.6
	sys/arch/mvme68k/mvme68k/locore.s: revision 1.129
	sys/arch/news68k/news68k/locore.s: revision 1.84
	sys/arch/hp300/hp300/locore.s: revision 1.183
	sys/arch/m68k/m68k/compat_13_sigreturn13.s: revision 1.8
	sys/arch/m68k/m68k/sigreturn.s: file removal
	sys/arch/m68k/include/pte_motorola.h: revision 1.10
	sys/arch/atari/atari/locore.s: revision 1.125
	sys/arch/amiga/amiga/locore.s: revision 1.169
	sys/arch/sun2/sun2/locore.s: revision 1.37
	sys/arch/next68k/next68k/locore.s: revision 1.84
	sys/arch/x68k/x68k/locore.s: revision 1.130
	sys/arch/sun3/sun3x/locore.s: revision 1.77
	sys/arch/cesfic/cesfic/locore.s: revision 1.45
	sys/arch/m68k/conf/files.m68k: revision 1.53
	sys/arch/sun3/sun3/locore.s: revision 1.109
	sys/arch/luna68k/luna68k/locore.s: revision 1.81
	sys/arch/mac68k/mac68k/locore.s: revision 1.182

Define PTE used in the pmap module int terms of the bit definitions
in mmu_{51,40}.h.

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.

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

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

Remove getsp(); nothing uses it.

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.

Stop using magic numbers for the MMU root pointer attributes and the
Translation Control register, and also get rid of "#if PGSHIFT == ..."
where those magic numbers are used.

Instead, define new macros: MMU51_SRP_BITS, MMU51_CRP_BITS, MMU51_TCR_BITS,
and MMU40_TCR_BITS, in terms of the definitions in mmu_{40,51}.h.  These
automagically adapt to 8K and 4K pages based on the machine-specific value
of PGSHIFT.

G/C unused ploadw().

G/C unused flushustp().

loadustp(): Optimize for the overwhelmingly common case of "not the HP MMU".
Rather than converting the level 1 table address to a page number before
calling loadustp() only to have loadustp() convert it back to an address
for the '851, '030, '040, and '060, instead pass the address and convert
to a page number only in the case of the HP MMU.

This is a wash on HP MMU machines (9000/320 and 9000/350), and saves at
least 4 instructions (2x moveq + 2x lsXl) on every context switch on
everything else.

TAB/spaces/indents cleanup.

s/identifing/identifying/ and s/multipler/multiplier/ in comments.

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

Sync with HEAD

Make sure interrupts are disabled during cpu_configure(9).

Fixes 'panic: kernel diagnostic assertion "cv_is_valid(cv)" failed'
during fdcisa(4) probe on Milan's DIAGNOSTIC kernel, caused by
a stray interrupt from the FDC right after isa_intr_establish().
No visible bad side effect on TT030 with this change.

Should be pulled up to netbsd-8.

G/C a couple of lingering instances of addupc().  There is still some bit-
rotten profiling code that references it, but that code is already almost
certainly broken for other reasons.

Sync with HEAD, resolve a few conflicts

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

Pull up following revision(s) (requested by tsutsui in ticket #624):
	sys/arch/atari/stand/xxboot/sdboot/milan/Makefile: revision 1.4
	sys/arch/atari/dev/nvram.c: revision 1.21
	sys/arch/atari/conf/MILAN.in: revision 1.28
	sys/arch/atari/atari/pmap_bootstrap.c: revision 1.9
	sys/dev/isa/fd.c: revision 1.111
	sys/arch/atari/atari/bus.c: revision 1.60
	sys/arch/atari/stand/xxboot/ahdi-xxboot/milan/Makefile: revision 1.4
	sys/arch/atari/atari/locore.s: revision 1.111
	sys/arch/atari/isa/isa_machdep.c: revision 1.41
	distrib/sets/lists/base/md.atari: revision 1.55
	sys/arch/atari/pci/pci_machdep.c: revision 1.55
	sys/arch/atari/pci/pci_machdep.c: revision 1.56
	sys/arch/atari/include/vmparam.h: revision 1.32
	sys/arch/atari/isa/isa_milan.c: revision 1.15
	sys/arch/atari/isa/isa_milan.c: revision 1.16
	sys/arch/atari/atari/bus.c: revision 1.59
	sys/arch/atari/atari/atari_init.c: revision 1.101
	sys/arch/atari/pci/pci_milan.c: revision 1.15
Fix I/O access failures for regions allocated by bus_space_map(9) on Milan.

Passing to PMAP_WIRED against I/O spaces seems problematic,
probably after yamt-km branch merge, which was committed
between NetBSD 3.0 and NetBSD 4.0.
(i.e. ISA and PCI devices on Milan didn't work after 4.0 release)

XXX:
According to pmap(9) man page, the "flags" arg for pmap_enter(9)
doesn't take VM_PROT_READ and VM_PROT_WRITE, but pmap_enter()
implementation in sys/arch/m68k/m68k/pmap_motolora.c historically
checks them.

Fix silent hang during config_console() (before consinit()) on Milan.
config_console() was a dirty hack used by ancient m68k ports
to probe and initialize console devices before "real" configure(9),
using subset of configure(9) functions.

In that case, most device specific data (except I/O access method)
are not initialized so we must not access device specific device_t and
softc structures in config_console() cases.

Fix silent hang after isa_intr_establish() on Milan.
The problems (wrong macro replacements) were slipped in rev 1.107:
http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/arch/atari/atari/locore.s#rev1.107
Handle yet another atari specific quirk in the MI ISA fdc(4)/fd(4) driver.
This makes fd(4) drive(s) (which is necessary for installation)
properly attached on Milan.
atari uses "fdcisa" and "fdisa" for ISA fdc to co-exist other fd(4)
drivers, on-board (atari/dev/fd.c) one and Hades (atari/dev/hdfd.c) one.

Use a proper PSL value to be passed to splx(9) functions.
This should have been changed on yamt-splraiseipl branch merge
back in 2006, which made MI IPL_xxx values independent from
m68k MD PSL values for the %sr register.

Restore piixide(4) for Milan and disable other pciide devices.
piixide was removed in rev 1.18 and the log message said
"because Intel IDE disk controllers only exist as part of
 Intel chipsets for x86 systems" but the Milan actually has
the Intel 82371FB southbridge on its board.
Other pciide devices are unlikely necessary for the default
kernel for such a rare machine.
Also fix pasto in comment.

Skip NVRAM checksum check and re-initialization on Milan.
Milan's firmware seems to use different check method.

Ack EOI for IRQ_SLAVE of the master PIC after ack for IRQ of the slave PIC.
I'm not sure if there are possible races in the original code, but
this is what i8259_asm_ack2() in sys/arch/x86/include/i8259.h does
and it looks this change makes a Milan kernel a bit stable.
Replace CRTC register values with ones taken from sys/dev/ic/vga_subr.c.
This fixes noise around column 3 and 4 and makes screen output clearer
on Milan with S3 Trio64V.

Explicitly setup the secondary IDE interrupt of PIIX on Milan.
The secondary IDE interrupt is connected to MBIRQ0 on PIIX, but
the Milan's ROM bootloader (at least version 0.99.7) doesn't seem
to setup the MBIRQ0 register to route it to IRQ15.

On Milan, also explicitly disable MBIRQ1 on PIIX.
Milan's ROM bootloader v1.2 and v1.4 incorrectly set MBIRQ0 connected
to the secondary IDE to IRQ14 (not 15) and unused MBIRQ1 to IRQ15,
so both IDE channels don't work properly.

Add dumb memory probe routines for Milan to use all available memory.
Tested on Milan with 32Mx1, 32Mx4, 128MBx1, and 128MBx3.
(bootloader ROM fails to load TOS with 128MBx4)
No particular comment on port-atari@:
 http://mail-index.netbsd.org/port-atari/2018/02/09/msg000580.html

Provide wdboot as a copy of sdboot for Milan.
It looks Milan's bootloader ROM emulates IDE disks as SCSI disks
so sdboot works for them, but atari's installboot checks a specified
device name and requires wdboot for wd(4) devices.

Fix another possible out of bounds.

Replace bus_dmamap_sync(9) op with a newer one taken from m68k/bus_dma.c.
This could fix memory corruption issue caused by PREREAD ops with regions
whose boundaries are not aligned at cacheline size.

Fix silent hang after isa_intr_establish() on Milan.

The problems (wrong macro replacements) were slipped in rev 1.107:
http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/arch/atari/atari/locore.s#rev1.107

sync with head

merge to -current.

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

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

Sync with HEAD.

sync with head

Sync with HEAD

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@.

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

Sync with HEAD.

sync with head.

sync with head

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

sync with head

Sync with HEAD.

- establish zs interrupts via common intr_establish() function rather than
  hardcording them in locore.s and vector.s
- also make interrupt handlers take per unit softc and put a softint cookie
  into softc (though atari machines have only one zs)
- tweak some structures as per MI z8530sc driver

Tested on TT030 using sl(4) on zs.

sync with head

Use common pmap_bootstrap_finalize() to initialize lwp0 uarea etc.
Tested on TT030.

Kill proc0paddr.  Use lwp0.l_addr instead.

sync with head.

Sync with HEAD.

Sync with HEAD.

Pull up following revision(s) (requested by tsutsui in ticket #219):
	sys/arch/atari/include/intr.h: revision 1.19
	sys/arch/atari/atari/locore.s: revision 1.102
	sys/arch/atari/atari/intr.c: revision 1.16
Account idepth in all interrupt handlers in locore.s.

Account idepth in all interrupt handlers in locore.s.

sync with HEAD

Sync with HEAD.

Sync with HEAD.

sync with head

Sync with HEAD.

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.

sync with HEAD

Merge the ppcoea-renovation branch to HEAD.

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

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

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

sync with head.

Sync w/ NetBSD-4-RC_1

Sync with head.

Sync with head.

Sync with HEAD.

Pull up following revision(s) (requested by mhitch in ticket #728):
	sys/arch/mvme68k/mvme68k/locore.s: revision 1.98
	sys/arch/mac68k/mac68k/trap.c: revision 1.128
	sys/arch/next68k/next68k/locore.s: revision 1.48
	sys/arch/mac68k/mac68k/locore.s: revision 1.152
	sys/arch/sun3/sun3/locore.s: revision 1.88
	sys/arch/sun2/sun2/locore.s: revision 1.19
	sys/arch/sun2/sun2/trap.c: revision 1.32
	sys/arch/m68k/m68k/db_trace.c: revision 1.51
	sys/arch/mvme68k/mvme68k/trap.c: revision 1.90
	sys/arch/news68k/news68k/trap.c: revision 1.53
	sys/arch/luna68k/luna68k/locore.s: revision 1.27
	sys/arch/atari/atari/locore.s: revision 1.99
	sys/arch/sun3/sun3/trap.c: revision 1.130
	sys/arch/x68k/x68k/trap.c: revision 1.89
	sys/arch/next68k/next68k/trap.c: revision 1.67
	sys/arch/x68k/x68k/locore.s: revision 1.79
	sys/arch/news68k/news68k/locore.s: revision 1.43
	sys/arch/luna68k/luna68k/trap.c: revision 1.46
	sys/arch/hp300/hp300/locore.s: revision 1.140
	sys/arch/cesfic/cesfic/locore.s: revision 1.15
	sys/arch/cesfic/cesfic/trap.c: revision 1.35
	sys/arch/m68k/m68k/trap_subr.s: revision 1.12
	sys/arch/amiga/amiga/locore.s: revision 1.143
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.

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.

Sync with head.

Update to HEAD.

Adapt to the merge of the yamt-idlelwp branch.
curcpu()->ci_want_resched is now required, so get rid of the
want_resched global.  Also, cpu_need_resched() now takes two arguments.
The l_next and l_back fields in struct lwp no longer exists, so delete
references to it from genassym.cf.
Also, m68k/m68k/proc_subr.s is no longer used, says mhitch, so remove its use.

This brings the atari BOOT kernel back to a buildable state.

Sync with head.

Pullup to -current

sync with head.

Apply MI softintr(9) patch before it becomes rotten. Untested.
See also:
http://mail-index.netbsd.org/port-atari/2007/03/07/0000.html

sync with head.

sync with head

sync with head.

Make sure .data is .long aligned.  (fixes linker warning)

merge ktrace-lwp.

Fix the sync with head I botched.

Sync with HEAD.

Sync with HEAD

Centralize identical copies of proc_trampoline code.

(lots more opportunites here for the bored hacker, such as rei and trap0...)

Uppercase CPU, plural is CPUs.

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

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

Use PAGE_SIZE rather than NBPG.

Merge the nathanw_sa branch.

Catch up to -current

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.

Curproc->curlwp renaming.

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

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

catch up with -current on kqueue branch

Catch up to -current.

Catch up with -current.

Pull up revision 1.88 (requested by leo):
Force the absolute jump in a more elegant way. Suggested by Jaromir Dolecek.

Force the absolute jump in a more elegant way. Suggested by Jaromir Dolecek.

Try to defeat the assembler optimizer. If we jump to a local label, it tries
to use a pc-relative jump. Which is definitely not what is needed in the
relocation code!
This is new in the current assembler apparantly. None of the kernels build
after my latest upgrade were able to boot... What else is lurking!

Catch up with -current.

Catch up to -current.

s/seperate/separate/

More catchup.

Sync kqueue branch with -current.

Add missing register prefix.

MD Scheduler Activation bits for Atari.
Compile-tested only.

Catch up with -current.

Update the kqueue branch to HEAD.

file locore.s was added on branch nathanw_sa on 2001-11-17 23:18:03 +0000

Some ELF adaption.

update to -current

seperate -> separate

Catch up to -current.

add missing   #include "opt_kgdb.h"

Add 'prev_sr' argument to milan_isa_intr() so we can properly defer interrupts
that come in at the wrong time.

Add some Milan support functions:
  - Low level isa interrupt handler
  - NMI fault handler - catches PLX access errors
  - PCI configspace read/write functions

Sync with HEAD

There are no level1 or level7 interrupts possible on the Milan...

full[tc]flush from GLOBAL -> ASLOCAL.

Catch up with -current.

Sync with HEAD.

Conditionalize inclusion of the interrupt handlers for 'kbd', 'zs' and
'ncrscsi' since they are not present on the Milan.

Sync with HEAD.

Prepare assembly parts for an eventual transition to ELF. Mostly from a
diff from Steve Woodford.

Sync with HEAD.

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

Define proper macros for FP frame offsets rather than magic numbers.

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.

Fix a typo that slipped in with the last round of scheduler changes. The
register numbers were exchanged.

add new macro BOOT_FLAG() (defined in <sys/boot_flag.h>) - this
maps standard boot flags to corresponding RB_* values
use BOOT_FLAG() in port's MD code as appropriate

as discussed on tech-kern, add new boot flags -v, -q for booting
verbosely or quietly, and corresponding AB_VERBOSE/AB_QUIET
boot flags; also add FreeBSD-compatible bootverbose macro and
NetBSD-specific bootquiet macro

for hpcmips, use new bootverbose instead of it's own hpcmips_verbose

Tested on i386, and to limited extend (compile of affected files) also for
mvme68k, hp300, luna68k, sun3.

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.

Sync w/ netbsd-1-5-base.

Throw in a bunch of _C_LABEL macro's. (Hi Klaus ;-)

_qs -> _sched_qs

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

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.

defopt FPSP.

Pull up to last week's -current.

Pull up revision 1.64 (requested by itohy):
  Fix the problem where single-step tracing of a trap instruction
  makes the system fall into kernel debugger.

Sync with -current

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

Centralize the declaration and clearing of `cold'.

Sync w/ -current.

pullup 1.61->1.62  (christos): conflicts manually edited

Include opt_compat_sunos.h

Add COMPAT_SVR4 for m68k.

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

mac68k part of pr 6152 fix, and missing bits for the others

Atari part of fix for pr 6152

Modifications of pmap_zero_page() and pmap_copy_page() inspired by recent
work from Jason Thorpe on the hp300 pmap.c.
Nuke the usage of the port-specific functions in favour of the m68k functions.

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).

defopt DDB.

Back out the defopt for M680?0. As pointed out to me, this breaks ports which
dont use the M680?0 the way Amiga, Atari, Mac68k, and X68k do. I must have
missed this in the past discussion about this project.

Move M680[2346]0 to opt_m68kcpu.h.
XXX Some explicit dependencies could be removed now from the individual
arch/$ARCH/conf/Makefile.$ARCH files, but this is still to be done.

Add UVM option.

Fix a bogosity apparently inherited from when the Utah 4.3BSD code base
was converted to use Mach VM for Net2/4.4BSD.  The user segment table
pointer was originally stored in the PCB.  When Mach VM came along,
however, it was also stored in the pmap, and loaded into the PCB in
pmap_activate().  pmap_activate() would then note that the PCB's USTP
was now in sync with the pmap's USTP, and the low-level context switch
code would use the value from the PCB.

However, pmap_activate() would also load the hardware MMU context if
the pmap was the current pmap (or, in the case where pmaps can be shared,
such as in NetBSD, if the proc was the current proc).  The low-level
context switch code would then reload the hardware _again_ using the
USTP from the PCB.

However, the optimization of not calling pmap_activate() if "stchanged"
was false ended up causing some processes to use stale USTP values from
the PCB when the low-level context switch code reloaded the hardware!
This was noticed by using a real vfork(2) (which worked for some time
before failing, surprisingly!)

Since I'm hard pressed to find any real optimization here (since the
hardware was always reloaded once, sometimes twice!), the code now always
calls pmap_activate(), which uses the correct USTP value (the one in the
pmap).  The PCB's USTP is now ignored, and should eventually be g/c'd.

Another optimization can actually be performed, and I have added a comment
describing what it is, but have not yet implemented it.

Also note that most of the loadustp() functions where actually incomplete.
This has been corrected.  These functions should probably be split up into
MMU-specific operations, and called indirectly, rather than doing constant
run-time decision making based on values that will never change during the
course of a boot's lifetime.

- Make pmap_activate() and pmap_deactivate() take a struct proc *.
- Define active_user_pmap() and use it in the appropriate places (from hp300
  port).

Update marc-pcmcia branch from trunk.

Use a buserror handler that just tests for 'nofault' being set when the
MMU is not yet initialized. This behaviour is necessary when probing
for the machine type - because we need the type before we can setup the
tables....

Introduce 'bootversion' in locore.s. Check this to decide if installing
a bootstrap with the running installboot makes sense.

Pull in latest Amiga bus/address error handling.

addql does set condition codes, so we are not allowed to put it in between
the andl and the jeq.
Mea maxima culpa.

The recent buserr handler cleanup in  the Amiga locore.s made the label
_buserr point to the 68020/030 buserr code _only_. This has broken access
error handling in the 060 support code.
This is repaired by jumping to _buserr60 from the 060SP, and by providing
a _buserr60 label identical to the _buserr in the unchanged m68k ports
using the 68060.

* finalize 060 stuff.

For locore.s also nuke cacheop-functions now provided in m68k.

More stuff for handling an 68060.

Fix the 'shifting screens' bug on the Falcon. This solution is not perfect
since it gives a bit of flicker while switching frame buffers. From
Thomas Gerner.

Eliminate references to vmspace.vm_pmap

Adjust for <m68k/m68k/trap_subr.s>

Use common m68k sigcode.

Use <m68k/m68k/proc_subr.s>

Remove a hardcoded interrupt handler. Now uses intr_establish() for the
SCSI-drq handler on the Hades.

Use <m68k/m68k/support.s>

Gerbage-collect extra copypage()

Remove ST-DMA handler, this interrupt now uses the glue code. Count the
clock interrupts in the new counter set.

Get rid of 'cpu040' variable. Use 'mmutype' or 'cputype' for testing
instead.

Add intr_establish/disestablish functions. Currently only the lpt-driver
is converted to use them...

Tweak the clockframe structure a bit so we are able to save a few cycles
at interrupt time. (From Gordon Ross).

Plug some spl-holes in the lp-driver. Also be more strict in protecting
the register access to the psg-chip. The combination of those bugs
caused the printer to print garbage sometimes.

Move the vector-table to kernel data space, so we can write to it.

Clear d0 before using it to turn off the 040 MMU. Clearing d0 was a side-effect
of the code removed in my previous commit.

Fix an inconsistency that came in with Lite: setrq() was renamed to
setrunqueue(), but remrq() was never renamed.  Rename remrq() to
remrunqueue().

Nuke 2 useless instructions that only cause _doboot to panic now that
page zero is *properly* protected.

Sync trace traps with the hp300.

Fix bootcode to work on the 68040.

- Add suline() for the new trap.c (Shouldn't this move to m68k/copy.s?)
- Fix some bugs in the interrupt handlers introduced by the new mapping
  of the st io-area.

- Cleanup a bit
- Remove the kernel-jump-to-zero code as page zero mapping is removed
- Weed out cpu040 usage, use mmutype instead
- Fix doboot code
- add fill for page zero
- use m68k/sigreturn.s

Pull up _kernel_text, fpfault & bus error changes.

Add fpfault & bus error handling corrections from Ignatios Souvatzis.

Add 'kernel_text' symbol (Gordon Ross).

Add centronics printer driver.

assym.s -> assym.h
(Some ports did this already.)

Oops, forgot to change one fixed address into a define.

Make an NMI activate the debugger. This only works on a TT and needs a small
hardware patch. This makes it easier to debug drivers that hang on an ipl
> splsoft.

Move bcopy/ovbcopy/memcpy into m68/m68k/copy.s, which is used by all
m68k ports already anyhow.  No use in keeping 6 identical copies of this
function around.

Add kernel option for separate {stat,prof}clock

merge in changes from 1.1 release branch

Don't call FPU specific functions before we are sure that there is an FPU.

Remove functions from locore.s that are duplicated in libkern. Also
replace blkclr() by bzero()

Add memcpy entry as suggested by gwr.

Remove some bogus comment.

Fix thinko

- Remove FPCOPROC ifdef's. Make fpu code dependant on fputype.
- Change clock interrupt handler: remove extra division by 4.

Remove icode, it doesn't seem to be used.

Fix double mapping of stack.

Ignore HBL/VBL interrupts instead of reporting them as stray as they
can't be turned off on a Falcon.

Shift system clocks  from TT-mfp to ST-mfp for Falcon.

NetBSD/Atari, port by Leo Weppelman.

Initial revision