port-sparc64/43362: "halt" at root device prompt does not work

[martin%NetBSD.org@localhost]

>Number:         43362
>Category:       port-sparc64
>Synopsis:       "halt" at root device prompt does not work
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    port-sparc64-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed May 26 10:00:00 +0000 2010
>Originator:     Martin Husemann
>Release:        NetBSD 5.99.29
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD nelly.aprisoft.de 5.99.29 NetBSD 5.99.29 (NELLY.MP) #130: Wed 
May 19 17:35:23 CEST 2010 
martin%emmas.aprisoft.de@localhost:/nelly/usr/src/sys/arch/sparc64/compile/NELLY.MP
 sparc64
Architecture: sparc64
Machine: sparc64
>Description:

I accidently booted a wrong kernel and it could not mount the root filesystem.
So I entered "halt" at the root device prompt and expected to get back to
OF, so I could reboot a different kernel. However, the OF prompt was dead.
This is reproducable at least on one machine.

>How-To-Repeat:
s/a

>Fix:
Need to investigate, filing as a reminder