CVS log for src/sys/arch/mac68k/mac68k/via.c

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Default branch: MAIN

Fix up the mac68k interrupt handlers to work with the new style common
clockframe layout and remove the CLOCK_FORMAT0 work-around.  As a nice
side-effect, this also eliminates the super-sketchy stack unwinding used
by rtclock_intr to get at the interrupt stack frame.

For GCC8, do not omit frame pointer for intr_dispatch() and via1_intr()
(-fomit-frame-pointer is enabled for -O and higher for GCC8).

This is required by rtclock_intr() which unwinds stack frame of caller!

XXXXXX
We need to get rid of this hackest hack for rtclock_intr(). This problem
was discussed back in 2014:

http://mail-index.netbsd.org/port-mac68k/2014/08/15/msg000595.html
http://mail-index.netbsd.org/port-mac68k/2014/08/17/msg000600.html
http://mail-index.netbsd.org/port-mac68k/2014/08/17/msg000601.html

However, unfortunately, the problem has been left untouched until today.

The patch attached in the third message works around the problem. But,
it adds hard-coded magic numbers to intr_dispatch() and via1_intr().
For real fix, we should probably reconsider whole interrupt handling.

Anyway, now kernel compiled by GCC8 works fine as far as I can see.

merge ktrace-lwp.

sync with -current

sync with head.  xen and whitespace.  xen part is not finished.

Sync with HEAD.

remove some more __P that I missed before.

Sync with HEAD.

de-__P, remove register, ansify, b* -> mem*.

Fix the sync with head I botched.

Sync with HEAD.

Sync with HEAD

__KERNEL_RCSID()

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.

Use constants defined in viareg.h to set value of VIA2.

Sync with main branch.

Sync w/ -current.

Unfortunately, several changes that are intermingled:
- Add initial IOP support.  ADB doesn't work yet for me, but it's here so
  that others will be encouraged to work on it.  ADB_HW_IOP basically
  is configured as a NOP so that serial consoles will continue to work.
- Roll via1_intr and via2_intr into the intr.c scheme--this also required
  changing rtclock_intr to grovel the stack differently so that hardclock
  gets the right arguments and softclock() doesn't get all reentrant.
- Make via1 interrupts parallel to via2 interrupts--handlers get a pass-
  through pointer and we can register handlers.  Register via1 interrupt
  with intr_establish()--normally level 1, level 6 for A/UX scheme.
- Use intr_establish() to set real via2 interrupt handler instead of the
  hacked function pointer.
- Reorganize adb-direct interrupts so that a function call is removed.
- Implement A/UX interrupts for all Quadras right now.  We may need to
  special case some Quadras, but Linux folks are reporting success on
  several models.
- Fix intrnames to be accurate for the normal, PSC, and A/UX interrupt
  configurations.

Rename via_shutdown() to via_powerdown() for clarity and consistency.

G/C rbv_vidstatus() and related constant.

Defopt ALTXBUTTONS, DISABLE_EXT_CACHE, and ZS_CONSOLE_ABORT.

Undo a thinko in the various VIA2 isr loops:  increment
bitnum inside the loop, not as part of the condition.

Generalize add_nubus_intr() a little more. Also, complete KNFing.

Attempt to clear stray NuBus interrupts in the default slot
interrupt handler.

Garbage collect the second (slot number) parameter to NuBus interrupt
handlers.  (Only slot_ignore() and slot_noint() need this, and we already
have a place to put this information.)  Adjust add_nubus_intr() so that if
the client_data arg is specified as NULL, pass the slot number as
client_data to the interrupt handler.

Update marc-pcmcia branch from trunk.

For consistency:  VIA_initialize() -> via_init()

Define, implement, and use oss_intr().

Mask off 'internal slot' in check to see if we should enable nubus intrs.

Defer enabling NuBus slot interrupts until all slots have been probed
and drivers attached.  This removes the need for the MAC68K_BROKEN_VIDEO
option.  From Allen Briggs.

Merge in changes from The Trunk, partially just reimplementing newarp.

The previous optimization of the interrupt handlers was a bit too
agressive.  Being a little more conservative pays the biggest dividend.

Fix part of last change:  don't mask off the high bit of the VIA IER until
the interrupt has been unflagged.  Problem noticed by Paul Goyette.

Generalize VIA1 and VIA2 interrupt registration a bit, and do a slight
optimization on the VIA interrupt handlers.

Don't unlock the NuBus on PowerBooks; this bit controls the Power Manager
chip on these machines.  From Takashi Hamada.

Remove include of ncr96scsi.h, since it's now an artifact, and the
unused include of ncrscsi.h while we're here.

Add a function to install an interrupt handler for 2nd scsi bus (Q900/950).
Take a guess that it's at via2, bit 0 (where 5380 DRQ is).

Fix two bugs noticed by Taras Ivanenko <ivanenko@ctpa03.mit.edu>
via.c: don't allow spl to remain at splhigh on error.
mainbus.c: Make sure that variable is initialized.

External cache card on the IIci is enabled by default;
use DISABLE_EXT_CACHE to turn it off.

backout previous kprintf change

printf -> kprintf, sprintf -> ksprintf

Minor style cleanup (avoid goto); no functional change.

Fix typo: from trunk.

Fix typo.

Pull up changes from trunk.  Console fix and external serial clock support.

Changes from Bill Studenmund to support external clocks on the modem port.

Minor cosmetic cleanup left over from reverting interrupt handlers

Pull up version 1.44 from the main branch.
>Clear via2 interrupts before processing, too.  It is up to the drivers to clear
>any interrupts that are flagged during processing.

Clear via2 interrupts before processing, too.  It is up to the drivers to clear
any interrupts that are flagged during processing.

Apparently the MRG ADB code becomes unstable if we handle via1 interrupts
properly, so go back to unflagging them all before processing any via1
interrupts.  Perhaps this can be changed back when we get ADB code that
does not rely on the ROMs?

Actually clear the interrupt on the RBV.

Due to the latching effect of the 6522 (VIA) chip, we need to unflag
interrupts only after the condition that caused the interrupt has been
cleared.  This is a particular problem with the 5380 SCSI controller,
since the Mac glue logic may raise (e.g.) the SCSI DRQ interrupt a number
of times during the course of a normal transfer.  By waiting to unflag it,
we effectively ignore all but the first.

Prototype for -Wall -Wstrict-prototypes -Wmissing-prototypes -Wno-uninitialized
Also change the device probing scheme to use something a bit more rational.
A current side-effect is that nubus cards are double-mapped.  I expect
to fix that shortly.
Also change splclock() to block everything but serial hardware interrupts.

Handle internal video interrupts on RBV-based machines differently so
that Ethernet cards have a chance to work.  In particular, this change
has been tested on the IIci, IIsi, and LCIII.  The crucial info behind
this code was the result of a lot of work by Julian Bean.

via.h -> machine/viareg.h and some other prototyping fixes.

Remove via_inited, as it is unused.

Implement mac68k_register_via1_t1_irq().  Also, remove via_inited warning.

Change an &= to an & -- the former stopped working for some reason
that I need to delve into when I have time.

Simplify nubus interrupt routines a bit.

Optimize the via interrupt processing routines a tad.  From
chas@ohm.nrl.navy.mil (Charles J. Williams).

Update a comment.

Make VIA2 interrupts pass an argument in and let the scsi_register_*_intr
functions use that, too.

Optimize accesses to VIA2 a bit.
Force SCSI driver to register interrupt functions and remove default
handlers.
Bring in a few changes from
Walter Ruetten <walter@ghpc8.ihf.rwth-aachen.de>--more to come later.
Define VIA interrupt functions as returning void, not long.

Process via2/rbv interrupts from low bit to high bit.

Change VIA2:vPCR setting to allow scsi IRQ and DRQ.

Be more vocal about interrupts that we don't expect.
Include ncrscsi.h and ncr96scsi.h.

delay(7) instead of delay(20) seems sufficient

get rbv_nubus_intr working--at least on the IIsi.

Get IIsi ethernet almost working.  Still misses a number of interrupts.

Clean up a lot.  Run machdep.c through indent.
Remove a bunch of old debugging code and some dead code.
Put in some new comments.  Need more.

Use flags for scsi interrupts.  clean up a small bit.

Fix a typo that's gone unnoticed for a long time.  Noticed by Brian
Gaeke (brg@dgate.org).

Add new nubus handling that's much more robust.
Update via, if_ae, and grf accordingly.
Revamp grf.

Separate nubus interrupt registry and enablement.

Update interrupts to use (void *client_data) instead of (int unit) as
parameter to interrupt function.

Actually set the vectors for RBV as well as VIA2.
Don't go to spl4 when we have an ADB interrupt.
Turn off video interrupts on the SE/30.

add_nubus_intr takes int (*)(), not void (*)().
Fix slot interrupts more.

Handle VIA2 (RBV?) better.  Speed up interrupt processing (which had a
negative impact on the ethernet timeouts).  This is still not correct,
but I am unsure what is correct.  We can, apparently, get a nubus
interrupt without any slots showing an interrupt condition.  Ick.  This
does not always happen before we apparently lose an interrupt, either
(see last (chronological) log message for if_ae.c).
Someone with a fresh set of eyes should probably look at this, but it's
cobbled together to (mostly) work.

Modify handling of via2 interrupts.  Ethernet is much more reliable
for me, now (one problem down, anyway).

Clean up via.c a good bit--still needs more.  Get rid of some timing stuff
that we aren't using at all anymore.

Clean up via.c a bit.  Still needs lots of work.

Mac ROM Glue changes from grantham@tenon.com.

new RCS ID format.

update, as requested by briggs

Be somewhat better at machine dependence, clean up a hair, and get rid
of addupc.

Change some constants to better values/don't use constants as much.

Changes by grantham for RBV support.

Fixup calls to profclock and softclock.

TRAP_TYPES macro to trap_types variable.
Yank some VIA initialization.  Seemed to cause some problems.

Use address instead of slot for add_nubus_intr.  This whole interrupt
scheme should probably be taken out and shot.

Cleanup.  Use mac68k_xxx macros instead of macII, etc.  Cleanup via.h.
Add minimal support for ddb.
BIG CHANGE: Use proper offsets for new gas in locore.s!!!

Update from 0.9-ish to -current.  Including a switch to use config.new.
The new functions (ptrace, etc) are stubbed.
Some cleanup, too.

The current MacBSD architecture sub-directory for NetBSD-0.9--more or
less.  It needs some help to get to be -current.  Support for minimal
hardware on the SE/30, II, IIx, and IIcx exists.

Initial revision