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Diffstat (limited to 'arch/s390/kernel/head.S')
-rw-r--r--arch/s390/kernel/head.S69
1 files changed, 6 insertions, 63 deletions
diff --git a/arch/s390/kernel/head.S b/arch/s390/kernel/head.S
index adad8863ee2..0f1db268a8a 100644
--- a/arch/s390/kernel/head.S
+++ b/arch/s390/kernel/head.S
@@ -272,7 +272,7 @@ iplstart:
# load parameter file from ipl device
#
.Lagain1:
- l %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # ramdisk loc. is temp
+ l %r2,.Linitrd # ramdisk loc. is temp
bas %r14,.Lloader # load parameter file
ltr %r2,%r2 # got anything ?
bz .Lnopf
@@ -280,7 +280,7 @@ iplstart:
bnh .Lnotrunc
la %r2,895
.Lnotrunc:
- l %r4,INITRD_START+ARCH_OFFSET-PARMAREA(%r12)
+ l %r4,.Linitrd
clc 0(3,%r4),.L_hdr # if it is HDRx
bz .Lagain1 # skip dataset header
clc 0(3,%r4),.L_eof # if it is EOFx
@@ -323,14 +323,15 @@ iplstart:
# load ramdisk from ipl device
#
.Lagain2:
- l %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # addr of ramdisk
+ l %r2,.Linitrd # addr of ramdisk
+ st %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12)
bas %r14,.Lloader # load ramdisk
st %r2,INITRD_SIZE+ARCH_OFFSET-PARMAREA(%r12) # store size of ramdisk
ltr %r2,%r2
bnz .Lrdcont
st %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # no ramdisk found
.Lrdcont:
- l %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12)
+ l %r2,.Linitrd
clc 0(3,%r2),.L_hdr # skip HDRx and EOFx
bz .Lagain2
@@ -379,6 +380,7 @@ iplstart:
l %r1,.Lstartup
br %r1
+.Linitrd:.long _end + 0x400000 # default address of initrd
.Lparm: .long PARMAREA
.Lstartup: .long startup
.Lcvtab:.long _ebcasc # ebcdic to ascii table
@@ -479,65 +481,6 @@ start:
.byte 0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7
.byte 0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff
-.macro GET_IPL_DEVICE
-.Lget_ipl_device:
- l %r1,0xb8 # get sid
- sll %r1,15 # test if subchannel is enabled
- srl %r1,31
- ltr %r1,%r1
- bz 2f-.LPG1(%r13) # subchannel disabled
- l %r1,0xb8
- la %r5,.Lipl_schib-.LPG1(%r13)
- stsch 0(%r5) # get schib of subchannel
- bnz 2f-.LPG1(%r13) # schib not available
- tm 5(%r5),0x01 # devno valid?
- bno 2f-.LPG1(%r13)
- la %r6,ipl_parameter_flags-.LPG1(%r13)
- oi 3(%r6),0x01 # set flag
- la %r2,ipl_devno-.LPG1(%r13)
- mvc 0(2,%r2),6(%r5) # store devno
- tm 4(%r5),0x80 # qdio capable device?
- bno 2f-.LPG1(%r13)
- oi 3(%r6),0x02 # set flag
-
- # copy ipl parameters
-
- lhi %r0,4096
- l %r2,20(%r0) # get address of parameter list
- lhi %r3,IPL_PARMBLOCK_ORIGIN
- st %r3,20(%r0)
- lhi %r4,1
- cr %r2,%r3 # start parameters < destination ?
- jl 0f
- lhi %r1,1 # copy direction is upwards
- j 1f
-0: lhi %r1,-1 # copy direction is downwards
- ar %r2,%r0
- ar %r3,%r0
- ar %r2,%r1
- ar %r3,%r1
-1: mvc 0(1,%r3),0(%r2) # finally copy ipl parameters
- ar %r3,%r1
- ar %r2,%r1
- sr %r0,%r4
- jne 1b
- b 2f-.LPG1(%r13)
-
- .align 4
-.Lipl_schib:
- .rept 13
- .long 0
- .endr
-
- .globl ipl_parameter_flags
-ipl_parameter_flags:
- .long 0
- .globl ipl_devno
-ipl_devno:
- .word 0
-2:
-.endm
-
#ifdef CONFIG_64BIT
#include "head64.S"
#else