* [patch 16/16] s390: 31 bit memory size limit.
@ 2005-06-21 16:30 Martin Schwidefsky
0 siblings, 0 replies; only message in thread
From: Martin Schwidefsky @ 2005-06-21 16:30 UTC (permalink / raw)
To: akpm, heiko.carstens, linux-kernel
[patch 16/16] s390: 31 bit memory size limit.
From: Heiko Carstens <heiko.carstens@de.ibm.com>
Limit reported memory size to 2GB if running in 31 bit mode.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diffstat:
arch/s390/kernel/head.S | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletion(-)
diff -urpN linux-2.6/arch/s390/kernel/head.S linux-2.6-patched/arch/s390/kernel/head.S
--- linux-2.6/arch/s390/kernel/head.S 2005-06-21 17:36:56.000000000 +0200
+++ linux-2.6-patched/arch/s390/kernel/head.S 2005-06-21 17:36:56.000000000 +0200
@@ -535,8 +535,13 @@ startup:basr %r13,0
lhi %r1,0
icm %r1,3,.Lscpincr1-PARMAREA(%r4) # use this one if != 0
jnz .Lscnd
- l %r1,.Lscpincr2-PARMAREA+4(%r4) # otherwise use this one
+ lhi %r1,0x800 # otherwise report 2GB
.Lscnd:
+ lhi %r3,0x800 # limit reported memory size to 2GB
+ cr %r1,%r3
+ jl .Lno2gb
+ lr %r1,%r3
+.Lno2gb:
xr %r3,%r3 # same logic
ic %r3,.Lscpa1-PARMAREA(%r4)
chi %r3,0x00
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