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s390/head: replace hard coded values with constants 

A couple of the low core offsets are repeatedly used throughout head.S
and are hard coded. Replace them with corresponding constants from
asm-offsets.h to improve readability.

Signed-off-by: Vasily Gorbik <gor@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Vasily Gorbik 2018-01-10 11:07:31 +01:00 committed by Martin Schwidefsky
parent 87b970f453
commit 34ba2450ab
1 changed files with 5 additions and 5 deletions
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10
arch/s390/kernel/head.S
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@ -66,7 +66,7 @@ __HEAD
# subroutine to wait for end I/O
#
.Lirqwait:
mvc 0x1f0(16),.Lnewpsw # set up IO interrupt psw
mvc __LC_IO_NEW_PSW(16),.Lnewpsw # set up IO interrupt psw
lpsw .Lwaitpsw
.Lioint:
br %r14
@ -98,7 +98,7 @@ __HEAD
bnz .Llderr
.Lwait4irq:
bas %r14,.Lirqwait
c %r1,0xb8 # compare subchannel number
c %r1,__LC_SUBCHANNEL_ID # compare subchannel number
bne .Lwait4irq
tsch 0(%r5)
@ -156,9 +156,9 @@ iplstart:
.fill 16,4,0x0
0: lmh %r0,%r15,0(%r13) # clear high-order half of gprs
sam31 # switch to 31 bit addressing mode
lh %r1,0xb8 # test if subchannel number
lh %r1,__LC_SUBCHANNEL_ID # test if subchannel number
bct %r1,.Lnoload # is valid
l %r1,0xb8 # load ipl subchannel number
l %r1,__LC_SUBCHANNEL_ID # load ipl subchannel number
la %r2,IPL_BS # load start address
bas %r14,.Lloader # load rest of ipl image
l %r12,.Lparm # pointer to parameter area
@ -239,7 +239,7 @@ iplstart:
bz .Lnoreset
.Lwaitforirq:
bas %r14,.Lirqwait # wait for IO interrupt
c %r1,0xb8 # compare subchannel number
c %r1,__LC_SUBCHANNEL_ID # compare subchannel number
bne .Lwaitforirq
la %r5,.Lirb
tsch 0(%r5)