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[PATCH] s390: 31 bit memory size limit

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Limit reported memory size to 2GB if running in 31 bit mode.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Heiko Carstens
2005-07-27 11:45:05 -07:00
committed by Linus Torvalds
parent 4111796d89
commit f878e43675
1 changed files with 6 additions and 1 deletions
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7
arch/s390/kernel/head.S
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@@ -535,8 +535,13 @@ startup:basr %r13,0 # get base
lhi %r1,0 lhi %r1,0
icm %r1,3,.Lscpincr1-PARMAREA(%r4) # use this one if != 0 icm %r1,3,.Lscpincr1-PARMAREA(%r4) # use this one if != 0
jnz .Lscnd jnz .Lscnd
l %r1,.Lscpincr2-PARMAREA+4(%r4) # otherwise use this one lhi %r1,0x800 # otherwise report 2GB
.Lscnd: .Lscnd:
lhi %r3,0x800 # limit reported memory size to 2GB
cr %r1,%r3
jl .Lno2gb
lr %r1,%r3
.Lno2gb:
xr %r3,%r3 # same logic xr %r3,%r3 # same logic
ic %r3,.Lscpa1-PARMAREA(%r4) ic %r3,.Lscpa1-PARMAREA(%r4)
chi %r3,0x00 chi %r3,0x00