o Force the ebase to be 0x80000000 (the base that we're booted with may
need to be respected in the future).
o Initialize the clock early so we can initialize the console early
o use panic where we can now use it.
o Tag some code for parsing the boot records as belonging in the cavium sdk.
o remove support for booting on ancient boards...
# we make it further in bootstrapping now: interrupts being enabled in the
# uarts are now taking us out, it seems, for reasons unknown.
the Cavium version of the boot loader puts data just after &end, so
our rounding up to the next page in clearing memory overwrote their
data, which meant we'd get a lot of wrong values for parameters to the
system.
While I'm here, remove argc/argv parsing. Those values aren't passed
in via a0 and a1, so it was a guaranted panic on some boards.
Copy the support files for the Octeon 1 CPU from sys/mips/octeon1 on
the projects/mips side to sys/mips/cavium on the head side to conform
to the other vendor code. This code was contributed by Cavium to the
project and forward ported by Warner Losh, with some additional code
from Randal Stewart.
# I'll fix the building problems the move creates in a future commit.
