Had insomnia, was hacking on JS1/OBP3 again.

Kernel causes watchdog reset in mmu_install_tables.  I guess the
problem is that I unmap PROM.  OF entry point is at f003381c, I tried
to move kernel to region F1.  And it seems kernel is not prepared to
deal with OBP in such a strange place (preceding it in virtual
memory).

These are non-zero entries PROM sets up for us on boot:

mmu_reservemon4m: Context @ 01fff000 = 001feec1
L1: 00:  @ 01feec00 = 001fee81
L1: 04:  @ 01feec10 = 001fb9f1
L1: 70:  @ 01feedc0 = 001fee51
L1: f0:  @ 01feefc0 = 001feeb1		- PROM (2 segs: f000.0000 .. f007.ffff)
L1: f1:  @ 01feefc4 = 001fee81		- KERNEL
L1: ff:  @ 01feeffc = 001fee21
pmap_bootstrap: installing kernel page tables...
pmap_bootstrap: cxtptr prom = 0x1fff00, kernel = 0x16300
pmap_bootstrap: flushing tlb and setting cxtptr
[watchdog reset]


Any ideas on how to layout kernel and arrange things so that boot prom
is not unmapped?  I'm studying pmap.c and would appreciate any hints.

Thanks.

PS: To make things, more umm... interesting, I have to pull 1.2M of
new kernel over modem after every recompile.  Reminds me of my punched
cards days. ;-)

SY, Uwe
-- 
uwe@ptc.spbu.ru                         |       Zu Grunde kommen
http://www.ptc.spbu.ru/~uwe/            |       Ist zu Grunde gehen