kern/62005: btx.s patch for i386 also applies to pc98 version

[Adrian Steinmann]

>Number:         62005
>Category:       kern
>Synopsis:       btx.s patch for i386 also applies to pc98 version
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Jan 27 13:10:17 PST 2004
>Closed-Date:
>Last-Modified:
>Originator:     Adrian Steinmann
>Release:        FreeBSD -stable, -current
>Organization:
Webgroup Consulting AG
>Environment:

/boot/loader

>Description:
In /usr/src/sys/boot/i386/btx/btx/btx.s revision 1.33 a reboot from
loader bug was fixed last november (see also PR i386/62003)

-		ljmp $0xffff,$0x0		# reboot the machine
+		ljmp $0xf000,$0xfff0		# reboot the machine

In /usr/src/sys/boot/pc98/btx/btx/btx.s this same problem still exists
near line 326, although it is ifdef-ed out by a .`ifdef' PC98

It would make sense to synchronise this code with the i386 case.

>How-To-Repeat:
This problem was discovered on Soekris net4501/4801 with comBIOS 1.22
boxes. Break into loader, "ok reboot" then hangs. See also PR i386/62003.

>Fix:
merge change in revision 1.33 from /usr/src/sys/boot/i386/btx/btx/btx.s
>Release-Note:
>Audit-Trail:
>Unformatted: