CVS log for src/sys/arch/hp300/dev/com_frodo.c

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Default branch: MAIN

Several years ago, the interrupt priority levels for devices were "flattened"
such that IPL_BIO, IPL_NET, and IPL_TTY (logical interrupt priority levels)
became aliases of IPL_VM (the logical interrupt priority level above which
memory allocation is not allowed).  Unfortuantely, this meant that any
use of these logical interrupt priority levels to differentiate between
different interrupt service routines at the same auto-vectored interrupt
level was pointless... "when everyone is special, no one is".

Before this flattening happened, these distinct logical interrupt priority
levels levels were dynamically mapped to physical auto-vectored interrupt
levels based on which types of devices registered themselves at which auto-
vectored level.  Now, splbio(), splnet(), etc. are all equivalent to splvm(),
which effectively blocks all device interrupts.

Switch to using the ISRPRI_* values provided by the common m68k interrupt
dispatch code, which allows interrupt handlers for devices that are more
latency-sensitive to be sorted earlier in the list of handlers at a given
auto-vectored interrupt level, as was originally intended.

Sync with HEAD

Sync with HEAD, resolve a few conflicts

Clean up initialization of com_regs structure, in preparation for
some additional changers.

Rebase to HEAD as of a few days ago.

Rebase.

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")

Pull up following revision(s) (requested by tsutsui in ticket #1058):
	sys/arch/hp300/conf/files.hp300: revision 1.88
	sys/arch/hp300/include/autoconf.h: revision 1.13
	sys/dev/ic/sti.c: revision 1.17
	sys/arch/hp300/dev/frodo.c: revision 1.31
	sys/arch/hp300/conf/GENERIC: revision 1.173
	sys/arch/hp300/hp300/machdep.c: revision 1.229
	sys/arch/hp300/dev/frodo.c: revision 1.32
	sys/arch/hp300/hp300/autoconf.c: revision 1.102
	sys/arch/hp300/dev/frodoreg.h: revision 1.5
	sys/arch/hp300/stand/common/ite_sti.c: revision 1.1
	sys/arch/hp300/stand/common/itevar.h: revision 1.16
	sys/arch/hp300/hp300/autoconf.c: revision 1.105
	sys/arch/hp300/dev/sti_sgcvar.h: revision 1.1
	sys/arch/hp300/stand/common/apci.c: revision 1.12
	sys/arch/hp300/stand/common/apci.c: revision 1.13
	sys/arch/hp300/dev/dnkbd.c: revision 1.6
	sys/arch/hp300/dev/dnkbd.c: revision 1.7
	sys/arch/hp300/stand/inst/version: revision 1.12
	sys/arch/hp300/dev/com_frodo.c: revision 1.9
	sys/arch/hp300/stand/common/ite.c: revision 1.17
	sys/arch/hp300/conf/GENERIC: revision 1.181
	sys/arch/hp300/dev/sti_sgc.c: revision 1.1
	sys/arch/hp300/stand/common/dnkbd.c: revision 1.13
	sys/arch/hp300/dev/sti_sgc.c: revision 1.2
	sys/dev/ic/stivar.h: revision 1.8
	sys/arch/hp300/dev/rtc.c: revision 1.21
	sys/arch/hp300/conf/INSTALL: revision 1.56
	sys/arch/hp300/conf/INSTALL: revision 1.58
	sys/arch/hp300/stand/uboot/version: revision 1.19
	sys/arch/hp300/stand/common/samachdep.h: revision 1.17
	sys/arch/hp300/stand/common/clock.c: revision 1.12
	sys/arch/hp300/dev/mcclock_frodo.c: revision 1.1
	sys/arch/hp300/stand/Makefile.buildboot: revision 1.34
	sys/arch/hp300/conf/files.hp300: revision 1.87
Add sti at sgc framebuffer.
Ported from OpenBSD by kiyohara@.
Fix a botch on switching from apci (and dca) to MI com(4) 10 years ago.
I.e. fix apci device address per FRODO_BASE macro change
in frodoreg.h rev 1.2.  Now bootloader works with serial console
on HP425e (which has only com at frodo).
Thanks to miod@openbsd for providing his 425e.
Add sti(4) at sgc screen console support.  From (the late) OpenBSD/hp300.
Tested on HP9000/425e, which was sent from Miod Vallat and
demonstrated at Open Source unConference 2014 Kagawa.
Check the service switch on 425e to select apci serial console.
Taken from OpenBSD/hp300.  See the following comment for details:
> * Check the service switch. On the 425e, this is a physical
> * switch, unlike other frodo-based machines, so we can use it
> * as a serial vs internal video selector, since the PROM can not
> * be configured for serial console.
Add proper RealTime Clock support for HP9000/425e.
As the OpenBSD/hp300 page says 425e doesn't have the traditional
RTC at intio (as it also lacks DCA 16550 serial at intio?),
but after a few hour investigation it turns out that
425e uses mc146818 compatible calendar clock in
the Apollo "frodo" utility chip and the frodo chip on
425e actually has the 32kHz OSC and is actually backed up
by the onboard lithium battery.
Tested on HP425e (with mcclock) and HP362 (with old rtc).
Add RTC support for HP9000/425e to bootloader too.
Also put several cleanup:
- make local functions and variables static
- use proper variable types
- some KNF
Note it turns out that extreme slowness of netboot on hp300 is
caused by the too slow access of the traditional RTC chip at intio
(i.e. netboot on 425e is so much faster than others). Oh well.
Add proper consinit(9) support for sti(4) at sgc framebuffer on hp300.
The cnattach functions for sti(4) and service switch check method
for 425e in com_frodo.c are taken from OpenBSD.
The strategy how to choose the console device in hp300_cninit() is
quite diverged from 4.4BSD and OpenBSD so it's tweaked by me.
Also put several changes in sti_sgc.c to reduce diffs from OpenBSD/hp300.
Tested on 425e and 362 (which still uses gendiofb(4), not sti(4)).
XXX: sti(4) requires uvm_km_alloc(9) and uvm_map_protect(9)
     to copy and call ROM functions on the executable memory region, so
     it can be called before UVM and related initializations are complete.
     Probably it's time to consider about MI "deferred consinit()" API
     in init_main.c (or elsewhere) for modern complicated VM system...
Also fix the apci device address in dnkbd.c as apci.c rev 1.12:
http://mail-index.netbsd.org/source-changes/2014/04/10/msg053940.html
Finally dnkbd(4) is confirmed working at least on bootloader.
Thanks again to Miod Vallat.
Make the Apollo Domain keyboard actually work.
Tested on HP9000/425e and the keyboard model A1630-82001 R2 (RX-60857-HW)
provided by Miod Vallat.  Mouse support needs more work.
Pull random notes on the Apollo Domain keyboard from ancient PR/3528.
Bump versions to denote recent 425e related changes.
Probe mcclock only on 425e to avoid an extra "not configured" message.
Add and enable sti(4) at sgc in install kernels for 425e.
Tested on both serial console and framebuffer console.
(switched by the service switch on the back panel)

sync with head

Add proper consinit(9) support for sti(4) at sgc framebuffer on hp300.

The cnattach functions for sti(4) and service switch check method
for 425e in com_frodo.c are taken from OpenBSD.
The strategy how to choose the console device in hp300_cninit() is
quite diverged from 4.4BSD and OpenBSD so it's tweaked by me.

Also put several changes in sti_sgc.c to reduce diffs from OpenBSD/hp300.

Tested on 425e and 362 (which still uses gendiofb(4), not sti(4)).

XXX: sti(4) requires uvm_km_alloc(9) and uvm_map_protect(9)
     to copy and call ROM functions on the executable memory region, so
     it can be called before UVM and related initializations are complete.
     Probably it's time to consider about MI "deferred consinit()" API
     in init_main.c (or elsewhere) for modern complicated VM system...

Sync with HEAD.

sync with head.

sync with head.

Remove clause 3 and 4 from TNF licenses

Sync with HEAD.

sync with head.

sync with HEAD

sync with head.

Split device_t and softc for all com(4) devices (well, everything that
uses a com_softc backend).  Use proper types and ansify where appropriate.

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.

sync with head

sync with head

Add an option COM_REGMAP to allow com(4) to use an array of register indices.
This allows us to convert aucom to just another com attachment, and cleanup
some code in the com_arbus.c.

Additionally, we use a common com_cleanup routine rather than having a
zillion copies of it in the attachment points.

This has been tested on a number architectures, and it has been shown to get
close to comparable performance when COM_REGMAP is defined, and comparable
when it is not defined.

Approved by core@.  Fixes PR port-evbmips/32362.

COM_INIT_REGS-ify these.  Compiles okay, but no real hardware test. :-)

merge ktrace-lwp.

Fix the sync with head I botched.

Sync with HEAD.

Sync with HEAD

Use ANSI function decls, static, and const.

Sync with HEAD

Pullup rev 1.2 (requested by tsutsui in ticket #116)

Adjust fd_name in struct frodo_device frodo_subdevs[]
since MD apci(4) has been switched to MI com(4).
Adjust FRODO_BASE macro since com_frodo uses bus_space_map(9)
which takes offset from intiobase instead of KVA.
It turns out that not only HP425e but other HP4xx models also require
COM_HW_NOIEN for APCI com(4) ports.

file com_frodo.c was added on branch ktrace-lwp on 2004-08-03 10:34:22 +0000

It turns out that not only HP425e but other HP4xx models also require
COM_HW_NOIEN for APCI com(4) ports.

Now I can login HP425t via both com[12] at frodo0.

Switch DCA and APCI serial devices to use MI com(4) driver.

DCA is tested on HP362 and HP382 with serial console,
but APCI on HP4xx is not tested yet.