From 6c2a9e6df60478e712f3c3d98b5047778a82a3d7 Mon Sep 17 00:00:00 2001 From: Gerald Schaefer Date: Wed, 20 Sep 2006 15:59:44 +0200 Subject: [S390] Use alternative user-copy operations for new hardware. This introduces new user-copy operations which are optimized for copying more than 256 Bytes on new hardware. Signed-off-by: Gerald Schaefer Signed-off-by: Martin Schwidefsky --- arch/s390/kernel/head64.S | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'arch/s390/kernel/head64.S') diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S index 1ebaa338aa7e..a8bdd96494c7 100644 --- a/arch/s390/kernel/head64.S +++ b/arch/s390/kernel/head64.S @@ -250,6 +250,19 @@ startup_continue: oi 7(%r12),0x80 # set IDTE flag 0: +# +# find out if we have the MVCOS instruction +# + la %r1,0f-.LPG1(%r13) # set program check address + stg %r1,__LC_PGM_NEW_PSW+8 + .short 0xc800 # mvcos 0(%r0),0(%r0),%r0 + .short 0x0000 + .short 0x0000 +0: tm 0x8f,0x13 # special-operation exception? + bno 1f-.LPG1(%r13) # if yes, MVCOS is present + oi 6(%r12),2 # set MVCOS flag +1: + lpswe .Lentry-.LPG1(13) # jump to _stext in primary-space, # virtual and never return ... .align 16 -- cgit v1.2.3