script when changing to 512M

["Boo Geum Jung" <bgjung%etri.re.kr@localhost>]

1) When changing just 32 to 512.
======
Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002
    The NetBSD Foundation, Inc.  All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
    The Regents of the University of California.  All rights reserved.

panic: uvm_km_init: could not reserve space for kernel
Stopped in pid 0 () at    0x1ff5dc:     lwz     r0, r1, 0x14
db> 

2) Add upper 256M mapping with bat3.
=======

Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002
    The NetBSD Foundation, Inc.  All rights reserved.
Copyright (c) 1982, 1986, 1989, 1991, 1993
    The Regents of the University of California.  All rights reserved.

NetBSD 1.6A (BGENERIC) #37: Wed Jun 12 01:04:24 KST 2002
    
bgjung%bgjung5.etri.re.kr@localhost:/home/bgjung/020525/src/sys/arch/sandpoint/compile
/BGENERIC
total memory = 512 MB
panic: startup: cannot allocate VM for buffers
Stopped in pid 0 () at    0x1ff5dc:     lwz     r0, r1, 0x14
db> 
========
256M works fine.

Perhaps it might be supposed that NetBSD/powerpc restrict VM_MAX_KERNEL_ADDRESS 
upto only 1 SEGMENT(0x10000000, 256M), I guess.

- bgjung