Under usefdt=1 type of context for G5 "4 core" (system total): unload then boot /boot/kernel/kernel fails very early with: panic: Translation map has incorrect cell count (260/256)

[Mark Millard]

[The loader here has been modified to always do the usefdt=1 code.
The modern VM_MAX_KERNEL_ADDRESS is in the kernel.]

In trying to boot for other experiments I tried at the loader prompt:

unload
load /boot/kernel/kernel
boot

and:

unload
boot -v /boot/kernel/kernel

Such combinations produced (typed from a picture of the screen,
the missing text was really missing):

GDB: no debug ports present
KDB: debugger backends: ddb
KDB: current backend: ddb
panic: Translation map has incorrect cell count (260/256)
cpuid = 0
time = 1
KDB: stack backtrace:
0xc000000000f9e       kdb_backtrace+0x60
0xc000000000f9e       vpanic+0x258
0xc000000000f9e       panic+0x3c
0xc000000000f9e       moea64_late_bootstrap+0x2c0
0xc000000000f9e       moea64_bootstrap_native+0x20c
0xc000000000f9e       pmap_bootstrap_0xc8
0xc000000000f9e       powerpc_init+0x440
0xc000000000f9efc0: at 

(And that is all.)

===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)