watch exception only for kseg0 addresses..?

["atul srivastava" <atulsrivastava9@rediffmail.com>]

Hello,

I am trying to set a watch exception in (IDT RC32334) my debugging 
execise
In arch/mips/lib/watch.S says "curremtly available only for KSEG0 
address"
which is evident by following assembly..
                LEAF(__watch_set)
                li      t0,0x80000000
                subu    a0,t0
                ori     a0,7
                xori    a0,7
                or      a0,a1
                mtc0    a0,CP0_WATCHLO
                .......

it is loading the physical address of KSEG0 addresses in CP0 
watchpoint register.
in change history of this file i am able to see  KSEG0 restriction 
removed only for arch/mips64/lib/watch.S...
while my manual is not specific about KSEG0 , can i safely use it 
for all addresses ,offcourse then above assembly has to be 
modified appropiately for addresses of different regions..
Best Regards.
Ashish