CVS log for src/sys/arch/hp300/hp300/locore.s

Up to [cvs.NetBSD.org] / src / sys / arch / hp300 / hp300

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.

fix tripple/quadruple "r" letter typos in comments and log messages.

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

Switch hp300 over to the common interrupt dispatch code.

XXX There are still some things to fix up here, but it's no worse
than it was before (the problems date back to when we flattened
the device interrupt levels into IPL_VM).

Switch hp300 over to the common m68k vector table.

Statically-initialize the '851 / '030 protorp with MMU51_SRP_BITS.  In
pmap_init(), re-initialize protorp with MMU51_CRP_BITS.  Remove the now-
redundant code that does this in each of the m68k platforms.

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().

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.

Remove ancient and obsolete #if blocks.

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

Sync with HEAD

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.

update from HEAD

Pull up following revision(s) (requested by tsutsui in ticket #62):
	sys/arch/hp300/conf/files.hp300: revision 1.89
	share/man/man4/arcofi.4: revision 1.1
	share/man/man4/arcofi.4: revision 1.2
	share/man/man4/Makefile: revision 1.617
	sys/arch/hp300/hp300/intr.c: revision 1.41
	sys/conf/files: revision 1.1100
	sys/arch/hp300/hp300/locore.s: revision 1.171
	distrib/sets/lists/man/mi: revision 1.1486
	sys/dev/ic/arcofivar.h: revision 1.1
	sys/arch/hp300/conf/majors.hp300: revision 1.26
	sys/arch/hp300/dev/arcofi_dio.c: revision 1.1
	sys/arch/hp300/conf/GENERIC: revision 1.188
	sys/dev/ic/arcofi.c: revision 1.1
Add new arcofi(4) audio driver for NetBSD/hp300, ported from OpenBSD.
The arcofi(4) is a driver for the HP "Audio1" device
(Siemens PSB 2160 "ARCOFI" phone quality audio chip)
found on the HP9000/425e and HP9000/{705,710,745,747} models
(but only hp300 attachment is ported for now).
The chip supports 8-bit mono 8kHz U-law, A-law and
16-bit mono slinear_be formats.
The old HP9000/425e playing tunes with this new arcofi(4) audio driver
was also demonstrated at Open Source Conference 2014 Shimane.
Add a man page for arcofi(4) driver.  From OpenBSD.
Fix date.

Add new arcofi(4) audio driver for NetBSD/hp300, ported from OpenBSD.

The arcofi(4) is a driver for the HP "Audio1" device
(Siemens PSB 2160 "ARCOFI" phone quality audio chip)
found on the HP9000/425e and HP9000/{705,710,745,747} models
(but only hp300 attachment is ported for now).
The chip supports 8-bit mono 8kHz U-law, A-law and
16-bit mono slinear_be formats.

The old HP9000/425e playing tunes with this new arcofi(4) audio driver
was also demonstrated at Open Source Conference 2014 Shimane.

Rebase to HEAD as of a few days ago.

sync with head.

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

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

sync with head

Use common m68k/busaddrerr.s for bus error and address error handlers.

No binary changes on GENERIC.

Remove an instruction for nonexistent 060 branch prediction error accounting.

It's amiga and atari specific and copied from amiga/locore.s
to mac68k/locore.s in rev 1.80, then pasted into other ports.
Note this is harmless because all these ports don't have 68060 variants
(i.e. it's inside #if defined(M68060) block) and mvme68k (which has 68060)
has removed it since the initial import.

Remove unused m68k_fault_addr, which is required only on mac68k for SBC.

It looks hp300 one was copied from mac68k in rev 1.75
and then it was pasted to other ports again and again.

defined(LKM) -> defined(MODULAR)

sync with head

Make FPU_EMULATE work on NetBSD/hp300.  Commented out by default in GENERIC.

Tested on HP9000/362 without optional MC68882 FPU in its socket.

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.

Make sure to call pflusha before (not after) enabling MMU on
68030/68851 initialization paths.

Pointed out by isaki@ per observation of ATC status on XM6i emulator.
Tested on TT030, HP362, NWS-1750, and X68030 by me.

XXX: probably we can remove existing pflusha or TBIA calls after MMU turned
XXX: on (and before enabling cache) but I leave them as is for now to avoid
XXX: unexcpected side effects.

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

bgt -> jgt for a short jump.

Fix indent and some comments.

unifdef __ELF__

Sync with HEAD.

sync with head

Remove trailing spaces.

sync with head

Move bootinfo address initialization to locore.s and machdep.c
to reduce MD quirks in pmap_bootstrap.c.
Also print bootinfo_pa in consinit() so that we can see
at least MMU is properly enabled after boot.

Tested on HP382.

Fix typo (and pasted lines). From OpenBSD.

With a quick test, HP9000/362 doesn't seem to have frodo utility chip,
so probe code to identify HP362 taken from OpenBSD has never worked.

Identify HP362 by probing device IDs of the on-board framebuffer instead.

---

>> NetBSD/hp300 Primary Boot, Revision 1.16 (from NetBSD 5.99.41)
>> HP 9000/362 SPU
>> Enter "reset" to reset system.
Boot: [[[sd0a:]netbsd][-a][-c][-d][-s][-v][-q]] :-
2836828+148212 [343504+216292]=0x361b24
Start @ 0xff003400 [1=0xff2dac50-0x361b24]...
Entry point: 0xff003400
Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
    2006, 2007, 2008, 2009, 2010
    The NetBSD Foundation, Inc.  All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
    The Regents of the University of California.  All rights reserved.

NetBSD 5.99.41 (GENERIC) #135: Mon Dec 27 23:30:21 JST 2010
        tsutsui@mirage:/usr/src/sys/arch/hp300/compile/GENERIC
HP 9000/362 (25MHz MC68030 CPU+MMU, 25MHz MC68882 FPU)
total memory = 16372 KB
avail memory = 11480 KB
 :

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

s/cpu_fork/cpu_lwp_fork/ in comment.

Replace a couple of magic numbers with proper macro.

Now we have Sysseg_pa value so no need to calculate it from KVA Sysseg.
Tested on hp300.

XXX: mac68k seems to have a different VA vs PA mechanism so I leave it for now.

Allow NetBSD/hp300 kernel work with PGSHIFT==13, i.e. 8KB/page.
Tested on HP9000/382 with 68040.

XXX: 8KB/page won't work on HP MMU machines (i.e. HP320 and HP350).

Move uvm_setpagesize() calls from locore.s to pmap_bootstrap_finalize().
Also explicitly set uvmexp.pagesize to prepare 8KB/page settings.

XXX: There is #ifdef !defined(amiga) && !defined(atari) workaround
XXX: because they have different pmap initialization functions.

Use common pmap_bootstrap_finalize() to initialize lwp0 uarea etc.
Tested on HP9000/382.

Kill proc0paddr.  Use lwp0.l_addr instead.

sync with head.

Sync with HEAD.

Sync with HEAD.

Fix inverted logic on FPU type check in fpfault().  From OpenBSD.

Pull up following revision(s) (requested by tsutsui in ticket #207):
	sys/arch/hp300/include/intr.h: revision 1.32
	sys/arch/hp300/hp300/locore.s: revision 1.145
	sys/arch/hp300/hp300/intr.c: revision 1.39
Remove obsolete code for old software interrupt emulation.
The MI softint(9) handles it in the kernel threads nowadays.
Note "Emulation of VAX REI instruction" is still there to handle ASTs.

Pull up following revision(s) (requested by tsutsui in ticket #207):
	sys/arch/hp300/hp300/locore.s: revision 1.144
	sys/arch/hp300/hp300/intr.c: revision 1.38
Account idepth in locore.s.

Remove obsolete code for old software interrupt emulation.
The MI softint(9) handles it in the kernel threads nowadays.

Note "Emulation of VAX REI instruction" is still there to handle ASTs.

Account idepth in locore.s.

sync with HEAD

Sync with HEAD.

sync with head.

- account idepth in a clock interrupt handler too
- use idepth for CLKF_INTR()

sync with head

sync with HEAD

Sync with HEAD

Garbage collect !__HAVE_TIMECOUNTER code.

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 hp300 to yamt-idlelwp. Tested on 9000/382.

sync with head.

Sync with head.

sync with head.

Switch hp300 to timecounter with MC6840 interval timer, which is
used for hardclcok(9). Old code is still left for reference.

XXX: possibly problematic if hardclock(9) is blocked more than 1/HZ,
XXX: but old microtime(9) implementation also had the similar problem.

sync with head

sync with head

Identify models HP362 and HP382. From OpenBSD, tested on my HP382.

Note now options HP362 and options HP382 are required for these models
in your kernel config file.

merge ktrace-lwp.

Sync with HEAD. Here we go again...

remove vestigal {,e}intr{names,cnt} symbols now that vmstat doesn't need them.

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...)

TAB/space cleanup.

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

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

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

Preserve the symbol table in the LKM || KSYMS cases also.

Use PAGE_SIZE rather than NBPG.

guarantee, not guarentee. Idea from miod@openbsd.

Merge the nathanw_sa branch.

Sync with HEAD.

Make this compile with LOCK_DEBUG

Remove the scheduler semantics from machine-dependent context switch.

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.

sync kqueue branch with HEAD

catch up with -current.

RAS support for m68k.

Catch up to -current.

catch up with -current.

catch up with -current.

Pull up revision 1.123 (requested by gmcgarry in ticket #384):
Back out part of revision 1.20 which was causing PROM re-entry
to fail.  Reported by Jarle Greipsland <jarle@uninett.no>.

Back out part of revision 1.20 which was causing PROM re-entry
to fail.  Reported by Jarle Greipsland <jarle@uninett.no>.

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.

Make this work with an ISO C preprocessor.

Catch up with -current.

use 'jmp label:l' to force adressing to be absolute, rather than pc-relative

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

Catch up with -current.

Add RCSIDs.

Catch up to -current.

Some assemblers will optimise addresses within .text into pc-relative
references.  Bogus for our MMU trampoline code which is relocated to
the last physical page before being invoked.  This hack enforces all
addresses wrt the MMU trampoline code not to be pc-relative.

Sync kqueue branch with -current.

Catch up to -current.

- shift event counters to intr.c
- use new event counters
- align comments

MD Scheduler Activation bits for HP300.
Compile-tested only.
Note: COMPAT_HPUX is not yet fully lwp'ified.

Make hil interrupts come through the standard dispatch mechanism rather
than its custom handler.

update to -current

file locore.s was added on branch nathanw_sa on 2001-11-18 18:09:32 +0000

seperate -> separate

Catch up to -current.

make this compile with DEBUG.

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.

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.

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.

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.

Add a bootinfo facility, as is used on i386 and pmax, ports.  We expect
the bootinfo to be located in the first page of kernel text (which has
been zero-filled for a Very Long Time to allow us to unmap KVA 0); the
boot loader will place it there after loading the kernel image.

Sync with -current

Add register prefixes that I missed before.

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

Next sweep: stack pointers, FP regs, and several control registers.

Next sweep of adding register prefix: %d0 - %d7.

First sweep of adding register prefix: %a0 - %a7.

Centralize the declaration and clearing of `cold'.

Update from trunk.

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.

Identify the 385 and 425e.  Partially from OpenBSD.

Sync w/ -current.

Fix a label name botch introduced in rev. 1.92; Ignatios owes me a non-beer.

pullup 1.94->1.95 (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.

hp300 part of the 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).

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.

Optimize some cycles out of the clock interrupt handler when
USE_LEDS is defined.

Add support for UVM.

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 *.

Update marc-pcmcia branch from trunk.

Consolidate some pre-main initialization into an hp300_init() function.

Update marc-pcmcia branch from trunk.

Fix a test that should be on fputype rather than cputype.

GC old comment.

Update marc-pcmcia branch from trunk.

Make this compile again when we only specify a machine with the
HP MMU (320, 350).

Fix typo in getting the 040 access fault address, noticed by
Allen Briggs in the mac68k locore.s

New bus error/address error trap handlers, code lifted from mac68k
port, which is lifted from amiga port, plus some changes from me:
- Add support for the HP MMU to the 020/030 bus/address error handler
  (mostly lifted wholesale from the old code).
- Rename addrerr and buserr to busaddrerr2030.  The new name reflects that
  these functions are specific to the 68020 and 68030, and that the same
  handler function is used for both vectors.

The vector table is patched once we know our CPU type, before the MMU
is enabled.  In the event that we're running on a CPU that we're not
configured for, simply invoke the PROM's "reboot request"; we have no
hope of running in the event of a config botch, since we need working
a working bus error handler for console initialization.

These new functions optimze for common-case page faults, eliminate
many run-time checks, and are sharable.

Eliminate references to vmspace.vm_pmap

Update for USELEDS changes.

Uniquely identify 345 vs. 375 vs. 400 and 380 vs. 425, useful when
looking for hp4xx-only hardware during autoconfiguration.  Code
mostly from Mike Smith, with a few changes by me.

- Don't make assumptions about how C labels are handled, use macros
  provided by <machine/asm.h> instead.
- Adjust for <m68k/m68k/trap_subr.s>

Rearrange the interrupt code slightly:
- place all interrupt-related macros, prototypes, etc. into <machine/intr.h>,
  like other ports.
- rename isrlink/isrunlink/isrinit, etc. intr_establish/intr_disestablish/
  intr_init, etc., and move to intr.c for naming consistency.
- don't call intr_init() twice.

Use common m68k sigcode.

Use <m68k/m68k/proc_subr.s>

Use <m68k/m68k/support.s>

Nuke MDP_HPUXTRACE.

- Garbage-collect doadump(); it hasn't been used for some time.
- Supply an `fputype' global.  Since all hp300's have an FPU, default
  it to FPU_68881, setting it to FPU_68040 if we detect a 68040 CPU.
- Use `fputype' at run-time rathern than FPCOPROC at compile-time.
- Re-arrange locore slightly; move startup code to the beginning, right
  after the vector table.

Don't genassym the trap type values; just include <machine/trap.h>

- Eliminate some unnecessary cpu/mmu checks, based on what CPUs
  the kernel was compiled for.
- Add some comments about possible further optimization.
- Garbage-collect extra copypage()

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

Garbage collect the "kernel jump to zero" stuff.  VA 0 is now invalid,
so the kernel will fault if the PC gets trashed like that.

Couple more small changes:
- Initialize proc0.p_addr just after setting up the kernel stack, to avoid
  getting NULL pointers in trap().  Change suggested by Gordon Ross.
- Panic if main() returns.
- Tidy up a couple of comments.

A few small changes:
- Offset kernel text one page.  Stash the PA of this offset page for
  use later.
- Add a few comments.
- Free up some registers earlier in the initialization process.
- Use a `prototc' to set the Translation Control register, rather
  than relying on a2 pointing just past the MMU trampoline in the
  high page.  (Suggested by Charles Hannum.)
- Set VBR to the kernel vector table just before turning on the MMU.
- Just before rebooting, set VBR to 0, which is what the BOOTROM expects
  it to be.

Check for internal HP-IB in SYSFLAG much earlier (i.e. before the MMU
is turned on).

Handle kernel trace traps and breakpoints like the Sun3 port:
	- Only pass user trace traps and breakpoints on to trap().
	- Before entering the debugger, switch to a temporary
	  stack so that the debugger can alter the stack pointer.
	- Add glue for KGDB (still not complete).
Clearly mark the MMU enable trampoline code.

Don't lower spl before calling main.  For now, do it right before
calling hilinit().  Eventually, would like to enable them only after
autoconfiguration is finished.

Declare a `cputype' global, and set it as appropriate.

Pulled up by request from Jason Thorpe

From Ignatios Souvatzis <is@NetBSD.ORG>:
	- handle fpfault properly on the 68040
	- properly distinguish between a bus error and an MMU fault
	  on systems with 68030 or 68851 MMUs

Put the vector table _after_ the temp stack.

Couple of changes:

	- New delay() function, modeled after sun3/mvme68k delay,
	  calibrated with a model's known cpu speed.
	- Use the defined constants for machineid and ectype
	  when determining what kind of machine we have, rather
	  than their expanded equivalents, for clarity.
	- Move the vector table to the data segment so that it
	  can be patched at run-time.

Add a "_kernel_text" symbol, for libkvm.  From Gordon Ross.

New interrupt handling code.  Highlights:
	- Interrupt service routines now take a pointer to
	  the device's softc, rather than a unit number.
	- Interrupt handling code in locore.s condensed.  Only
	  remaining "special" handlers are lev0 (spurious),
	  lev1 (HIL; don't ask), lev6 (clock), and lev7 (NMI).
	  Only remaining hard-coded device driver reference in
	  locore is HIL.  (clock doesn't count...)
	- "dcafastservice" eliminated.  DCA driver has new mechanism
	  to guarantee prompt interrupt service at any ipl (not
	  just level 5).
	- Interrupt code pulled out of autoconf.c and machdep.c and
	  placed in new file, isr.c

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

Use the common sigreturn routine.

Remove all the old STACKCHECK stuff; it hasn't been used for a long time.

Rather than using individual HP300 model names, map those model names to
properties such as "M68040" and "M68K_MMU_MOTOROLA", used to conditionally
compile code.  This is more in-line with now the other m68k ports do it,
and makes it much easier to find "common ground" among them.

In locore.s, use the MMU-type constants defined my <machine/cpu.h> rather
than "expanded" values.

Because HP300-model names are mapped to CPU/MMU combinations in
<machine/cpu.h>, no change to kernel configuration will be necessary.

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.

Remove the icode stuff; it hasn't been used in a long time.

Remove __main(), strlen(), bzero(), and bcmp().  They're all in libkern.

Add a memcpy() entry as suggested by Gordon Ross.  Use <machine/asm.h>
where appropriate.

Make sure proc0's md_regs is initialized.

Add a child_return() function to clean up the child's state correctly, and
use this in cpu_fork().  Generalize proc_trampoline() so it can also be used in
this case.

main() should never return.

Eliminate the double mapping of the kernel stack.  Enable swapping.

More UPAGES --> USPACE.

Remove fu/su functions.

Don't include copy.s from here.

Use common m68k version of copy.s.

Make the LEDS blink like Jason's heart. from <thorpej@cs.orst.edu>

new RCS ID format.

Update from trunk.

Don't try to load p_priority from the run queue head.

Update from trunk.

Do a hack similar to the AST optimization for SIRs on syscall exit.

Very simple change to avoid a complete register save/restore pair when handling
ASTs after a syscall.

Remove some functions which are in libkern.

Optimize the run queue frobnication, and add some more DIAGNOSTIC checks.

Redo the interface to FPSP, using the supplied glue code.

Switch to Motorola emulator.

Update RCS id.

Use 4.4 init bootstrapping method.

New copy*() functions, cloned from the appropriate functions in libc.  Handles
>64k lengths correctly.

Copy copyinstr() from m68k generic, to deal with len > 64k.  XXX I think this
code is buggy.

Merge with 4.4-Lite.

swtch() --> cpu_switch()

Keeping up with the Chrises...

Most of the changes needed to make this continue to run.

Simplify calling sequences for hardclock() and profclock().

Reorder clockframe.

Fix comments

Pass a frame pointer to profclock(), too.

Pass a pointer to hardclock()...

Use esym now.  Note this *requires* using the NetBSD boot block.

Don't rely on esym being passed in until I am impressed enough with the new
boot program to switch.

Remove functions that are defined in libkern or m68k/copy.s.

Deal with DDB symbol table loaded by bootstrap

Add a variable (currently unused in this port) to make DDB happy.

Change the address calculations in icode to match current as.

The NetBSD assembler seems to want the old icode.  Don't ask me.

This seems to fix the calculation of the file name and arg string pointers
in icode.

Add RCS identifiers (this time on the correct side of the branch), and
incorporate recent changes in netbsd-0-9 branch.

add rcsids to everything and clean up headers

add hp300 kernel files.  generic kernel files might need some help...

Initial revision