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Commit 34ba2450 authored by Vasily Gorbik's avatar Vasily Gorbik Committed by Martin Schwidefsky
Browse files

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: default avatarVasily Gorbik <gor@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 87b970f4

arch/s390/kernel/head.S

+5 −5
Original line number Diff line number Diff line
@@ -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)