--- a/1up.pdesc
+++ b/1up.pdesc
@@ -33,7 +33,7 @@

 node mblock p0_memlist0 {
 	base = 0x0000000080000000;
-	size = 256M;
+	size = 1024M;
 }

 node memory memory {
--- a/1up.hdesc
+++ b/1up.hdesc
@@ -32,7 +32,7 @@
 #include "common.hdesc"

 CPU(0,guest0,0)
-GUEST(0, 0x1, 0x80000000, 256M, 0x80000000, 0x1f12000000, 0x1f40000000)
+GUEST(0, 0x1, 0x80000000, 1024M, 0x80000000, 0x1f12000000, 0x1f40000000)

 node cpus cpus {
 	cpu -> cpu0

Result: PASS

Output:
cpu Probing I/O buses


Sun Fire T2000, No Keyboard
Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
OpenBoot 4.20.0, 1024 MB memory available, Serial #1122867.
[mo23723 obp4.20.0 #0]
Ethernet address 0:80:3:de:ad:3, Host ID: 80112233.



ok boot -kdv
Boot device: /virtual-devices/disk@0  File and args: -kdv
hsfs-file-system
Loading: /platform/sun4v/boot_archive
ramdisk-root ufs-file-system
Loading: /platform/sun4v/kernel/sparcv9/unix
module /platform/sun4v/kernel/sparcv9/unix: text at [0x1000000, 0x10d9cef] data at 0x1800000
module /platform/sun4v/kernel/sparcv9/genunix: text at [0x10d9cf0, 0x12d4d17] data at 0x18d93c0
module /platform/sun4v/kernel/misc/sparcv9/platmod: text at [0x12d4d18, 0x12d4d1f] data at 0x192f670
module /platform/sun4v/kernel/cpu/sparcv9/SUNW,UltraSPARC-T1: text at [0x12d4d20, 0x12d8e77] data at 0x192fd40
Loading kmdb...
module /platform/sun4v/kernel/misc/sparcv9/kmdbmod: text at [0x12d8e80, 0x13553bf] data at 0x19487c0
module /kernel/misc/sparcv9/ctf: text at [0x13553c0, 0x135cda7] data at 0x1965f30
-
Welcome to kmdb
kmdb: unable to determine terminal type: assuming `vt100'
Loaded modules: [ unix krtld genunix ]
[0]> :c
SunOS Release 5.11 Version snv_134 64-bit
Copyright 1983-2010 Sun Microsystems, Inc.  All rights reserved.
Use is subject to license terms.
os-io Ethernet address = 0:80:3:de:ad:3
Using default device instance data
mem = 1048576K (0x40000000)
avail mem = 696803328
root nexus = Sun Fire T2000
pseudo0 at root
pseudo0 is /pseudo
scsi_vhci0 at root
scsi_vhci0 is /scsi_vhci
NOTICE: Disabling watchdog as watchdog services are not available

ramdisk0 at root
ramdisk0 is /ramdisk-root
root on /ramdisk-root:a fstype ufs
pseudo-device: dld0
dld0 is /pseudo/dld@0
cpu0: UltraSPARC-T1 (chipid 0, clock 5 MHz)
pseudo-device: audio0
audio0 is /pseudo/audio@0
pseudo-device: devinfo0
devinfo0 is /pseudo/devinfo@0
iscsi0 at root
iscsi0 is /iscsi
pseudo-device: pseudo1
pseudo1 is /pseudo/zconsnex@1
pseudo-device: drctl0
drctl0 is /pseudo/drctl@0
pseudo-device: zfs0
zfs0 is /pseudo/zfs@0
pseudo-device: fcode0
fcode0 is /pseudo/fcode@0
pseudo-device: llc10
llc10 is /pseudo/llc1@0
pseudo-device: lofi0
lofi0 is /pseudo/lofi@0
pseudo-device: ramdisk1024
ramdisk1024 is /pseudo/ramdisk@1024
pseudo-device: mdesc0
mdesc0 is /pseudo/mdesc@0
WARNING: kernel debugger was booted; application watchdog is not available.
pseudo-device: trapstat0
trapstat0 is /pseudo/trapstat@0
pseudo-device: dtrace0
dtrace0 is /pseudo/dtrace@0
pseudo-device: fbt0
fbt0 is /pseudo/fbt@0
pseudo-device: dcpc0
dcpc0 is /pseudo/dcpc@0
pseudo-device: lockstat0
lockstat0 is /pseudo/lockstat@0
pseudo-device: profile0
profile0 is /pseudo/profile@0
pseudo-device: fasttrap0
fasttrap0 is /pseudo/fasttrap@0
pseudo-device: systrace0
systrace0 is /pseudo/systrace@0
pseudo-device: sdt0
sdt0 is /pseudo/sdt@0
pseudo-device: fcp0
fcp0 is /pseudo/fcp@0
pseudo-device: fcsm0
fcsm0 is /pseudo/fcsm@0
Hostname: opensolaris
Remounting root read/write
Probing for device nodes ...
Preparing automated install image for use
Requesting System Maintenance Mode
(See /lib/svc/share/README for more information.)
Console login service(s) cannot run

Enter user name for system maintenance (control-d to bypass): root
Enter root password (control-d to bypass):
single-user privilege assigned to root on /dev/console.
Entering System Maintenance Mode

Jul 16 07:30:51 su: 'su root' succeeded for root on /dev/console
-bash: /usr/sbin/quota: No such file or directory
Sun Microsystems Inc.    SunOS 5.11    snv_134    February 2010
-bash: /bin/mail: No such file or directory
-bash: /usr/bin/hostname: No such file or directory
root@:~#