CVS log for src/sys/arch/powerpc/include/ofw_machdep.h

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Keyword substitution: kv
Default branch: MAIN

move ofprint() to powerpc/ofw_machdep.c and make it official
now that console output uses locks it needs more of the kernel to function, so
for now use direct OF calls for earliest debug output

fix various typos in comments and messages.

Sync with HEAD.

file ofw_machdep.h was added on branch thorpej-futex on 2021-04-03 22:28:34 +0000

- Add a boolean "ofwbootcons_suppress" that, when true, suppresses
  ofwbootcons I/O (i.e. "doesn't call into OFW").  This allows
  platform code to ensure that early console I/O doesn't occur in certain
  critical sections.
- When printing the translations, put phys next to virt for easier
  visual comparisons.

Bump OFW_MAX_TRANSLATIONS from 32 -> 48.  32 was already tight (at least
on my Macs), and having having translations for the kernel itself present
in the firmware's translation table bumped it over the 32-entry limit.

Shuffle around a couple of things that aren't particularly OEA-specific:

- Early bootstrap console initialization moves to ofw_machdep.c, and
  is called a bit earlier, from ofw_bootstrap().

- Decoding the "translations" property from /chosen/mmu is specified
  in the general OpenFirmware PowerPC bindings, and is not specific to
  any particular PowerPC flavor.  It's now decoded a bit earlier in
  ofw_bootstrap().

The *interpretation* of the mode field of a translation is, however,
implementation-specific, so that remains in ofwoea_machdep.c.

Add an ofw_bootstrap() function, called during early bootstrap from
ofwinit() to perform additional early initialization in C code.  Use
this to get the memory config while we're still running in the OpenFirmware
client environment, rather than waiting until we've started fiddling with
the system state.