sun4v: add 32/64 bit workaround for the OF_read() call, similar to the one introduced in revision 1.21

Add KASSERTs to catch access to NULL OF nodes early

Rework locking mechanism introduced in rev. 1.21: use __cpu_simple_lock... instead of mutex_... since this causes issues when LOCKDEBUG is defined

sun4v: Workaround for OpenBoot feature where a 64-bit address is truncated to a 32-bit address. This happends when a write to the console (/virtual-devices@100/console@1) is done. Avoid this by using

sun4v: Workaround for OpenBoot feature where a 64-bit address is truncated to a 32-bit address. This happends when a write to the console (/virtual-devices@100/console@1) is done. Avoid this by using a static buffer that is mapped below 4GB. Thanks to Tarl Neustaedter for explaining how OpenBoot works. ok martin@

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Sync sparc64 kernel's OF_seek with ofwboot's one, but sparc version
is not changed.

avoid shadowed variable

if _KERNEL is not defined, include <sys/stdarg.h> for va_list. For the
kernel (or modules) this is already done by systm.h.

Retire varargs.h support. Move machine/stdarg.h logic into MI
sys/stdarg.h and expect compiler to provide proper builtins, defaulting
to the GCC interface. lint still has a special fallback.
Reduce a

Retire varargs.h support. Move machine/stdarg.h logic into MI
sys/stdarg.h and expect compiler to provide proper builtins, defaulting
to the GCC interface. lint still has a special fallback.
Reduce abuse of _BSD_VA_LIST_ by defining __va_list by default and
derive va_list as required by standards.

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Add missing va_end() calls, reported by Stepan "doomwarrior" on
port-sparc64.

TRUE -> true, FALSE -> false

Fix a bunch of cast lvalues.

Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

ANSIify. Same binary code is produced for GENERIC.MP + KGDB + DDB.

Run the MicroSPARC IIep PCI bus without endianness translation.
This allows us to run X without any additional code changes.

- sprinkle const
- convert to ansi prototypes.

* Add OF_claim() for sparc64.
* Change OF_interpret() to the unabridged version.
* Sync OF_sym2val() and OF_val2sym() with the psarc64 versions.

sprinkle some: libkern.h, some -ffreestanding and some cast-y goodness,
all for the pleasure of the gcc 3 :-)

__KERNEL_RCSID()

On ms-IIep kernel runs with PCI endian swapping turned on but we need
to turn it off before we pass control to PROM's repl as it expects
PCIC to be in little endian mode and would hang otherwise.

va_{start,end} audit:
Make sure that each va_start has one and only one matching va_end,
especially in error cases.
If the va_list is used multiple times, do multiple va_starts/va_ends.
If a function

va_{start,end} audit:
Make sure that each va_start has one and only one matching va_end,
especially in error cases.
If the va_list is used multiple times, do multiple va_starts/va_ends.
If a function gets va_list as argument, don't let it use va_end (since
it's the callers responsibility).

Improved by comments from enami and christos -- thanks!

Heimdal/krb4/KAME changes already fed back, rest to follow.

Inspired by, but not not based on, OpenBSD.

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use _KERNEL_OPT

sync with sparc64 (just some debug messages.)

Adjust OF_setprop() prototype.

Provide a uniform interface to most of the PROM functions.
Include an Openfirmware back-end (mostly copied from sparc64).