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-rw-r--r--arch/s390/kernel/head.S27
1 files changed, 21 insertions, 6 deletions
diff --git a/arch/s390/kernel/head.S b/arch/s390/kernel/head.S
index b804c55bd919..fc8bf5e285f6 100644
--- a/arch/s390/kernel/head.S
+++ b/arch/s390/kernel/head.S
@@ -345,10 +345,25 @@ iplstart:
bno .Lnoreset
la %r2,.Lreset
lhi %r3,26
- .long 0x83230008
+ diag %r2,%r3,8
+ mvc 0x78(8),.Lrdrnewpsw # set up IO interrupt psw
+.Lwaitrdrirq:
+ lpsw .Lrdrwaitpsw
+.Lrdrint:
+ c %r1,0xb8 # compare subchannel number
+ bne .Lwaitrdrirq
+ la %r5,.Lirb
+ tsch 0(%r5)
.Lnoreset:
+ b .Lnoload
+
+ .align 8
+.Lrdrnewpsw:
+ .long 0x00080000,0x80000000+.Lrdrint
+.Lrdrwaitpsw:
+ .long 0x020a0000,0x80000000+.Lrdrint
#endif
-
+
#
# everything loaded, go for it
#
@@ -517,10 +532,10 @@ startup:basr %r13,0 # get base
l %r2, .Lrcp2-.LPG1(%r13) # try with Read SCP
b .Lservicecall-.LPG1(%r13)
.Lprocsccb:
- lh %r1,.Lscpincr1-PARMAREA(%r4) # use this one if != 0
- chi %r1,0x00
- jne .Lscnd
- l %r1,.Lscpincr2-PARMAREA(%r4) # otherwise use this one
+ 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
.Lscnd:
xr %r3,%r3 # same logic
ic %r3,.Lscpa1-PARMAREA(%r4)
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