Commit 58770be6 authored by Heiko Carstens's avatar Heiko Carstens Committed by Martin Schwidefsky

s390/ipl: remove builtin tape ipl code

Remove the builtin tape ipl code. If somebody really wants to create a
tape which can be ipl'ed from, then this can be achieved by using zipl.
zipl can write an ipl record to a tape device and aftwards the kernel
image must be written to tape.
The steps are described in the "Linux on System z - Device Drivers,
Features, and Commands" book (SC33-8411).
Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent c15787a7
......@@ -406,33 +406,6 @@ config CHSC_SCH
comment "Misc"
config IPL
def_bool y
prompt "Builtin IPL record support"
help
If you want to use the produced kernel to IPL directly from a
device, you have to merge a bootsector specific to the device
into the first bytes of the kernel. You will have to select the
IPL device.
choice
prompt "IPL method generated into head.S"
depends on IPL
default IPL_VM
help
Select "tape" if you want to IPL the image from a Tape.
Select "vm_reader" if you are running under VM/ESA and want
to IPL the image from the emulated card reader.
config IPL_TAPE
bool "tape"
config IPL_VM
bool "vm_reader"
endchoice
source "fs/Kconfig.binfmt"
config FORCE_MAX_ZONEORDER
......
......@@ -34,125 +34,7 @@
#endif
__HEAD
#ifndef CONFIG_IPL
.org 0
.long 0x00080000,0x80000000+startup # Just a restart PSW
#else
#ifdef CONFIG_IPL_TAPE
#define IPL_BS 1024
.org 0
.long 0x00080000,0x80000000+iplstart # The first 24 bytes are loaded
.long 0x27000000,0x60000001 # by ipl to addresses 0-23.
.long 0x02000000,0x20000000+IPL_BS # (a PSW and two CCWs).
.long 0x00000000,0x00000000 # external old psw
.long 0x00000000,0x00000000 # svc old psw
.long 0x00000000,0x00000000 # program check old psw
.long 0x00000000,0x00000000 # machine check old psw
.long 0x00000000,0x00000000 # io old psw
.long 0x00000000,0x00000000
.long 0x00000000,0x00000000
.long 0x00000000,0x00000000
.long 0x000a0000,0x00000058 # external new psw
.long 0x000a0000,0x00000060 # svc new psw
.long 0x000a0000,0x00000068 # program check new psw
.long 0x000a0000,0x00000070 # machine check new psw
.long 0x00080000,0x80000000+.Lioint # io new psw
.org 0x100
#
# subroutine for loading from tape
# Parameters:
# R1 = device number
# R2 = load address
.Lloader:
st %r14,.Lldret
la %r3,.Lorbread # r3 = address of orb
la %r5,.Lirb # r5 = address of irb
st %r2,.Lccwread+4 # initialize CCW data addresses
lctl %c6,%c6,.Lcr6
slr %r2,%r2
.Lldlp:
la %r6,3 # 3 retries
.Lssch:
ssch 0(%r3) # load chunk of IPL_BS bytes
bnz .Llderr
.Lw4end:
bas %r14,.Lwait4io
tm 8(%r5),0x82 # do we have a problem ?
bnz .Lrecov
slr %r7,%r7
icm %r7,3,10(%r5) # get residual count
lcr %r7,%r7
la %r7,IPL_BS(%r7) # IPL_BS-residual=#bytes read
ar %r2,%r7 # add to total size
tm 8(%r5),0x01 # found a tape mark ?
bnz .Ldone
l %r0,.Lccwread+4 # update CCW data addresses
ar %r0,%r7
st %r0,.Lccwread+4
b .Lldlp
.Ldone:
l %r14,.Lldret
br %r14 # r2 contains the total size
.Lrecov:
bas %r14,.Lsense # do the sensing
bct %r6,.Lssch # dec. retry count & branch
b .Llderr
#
# Sense subroutine
#
.Lsense:
st %r14,.Lsnsret
la %r7,.Lorbsense
ssch 0(%r7) # start sense command
bnz .Llderr
bas %r14,.Lwait4io
l %r14,.Lsnsret
tm 8(%r5),0x82 # do we have a problem ?
bnz .Llderr
br %r14
#
# Wait for interrupt subroutine
#
.Lwait4io:
lpsw .Lwaitpsw
.Lioint:
c %r1,0xb8 # compare subchannel number
bne .Lwait4io
tsch 0(%r5)
slr %r0,%r0
tm 8(%r5),0x82 # do we have a problem ?
bnz .Lwtexit
tm 8(%r5),0x04 # got device end ?
bz .Lwait4io
.Lwtexit:
br %r14
.Llderr:
lpsw .Lcrash
.align 8
.Lorbread:
.long 0x00000000,0x0080ff00,.Lccwread
.align 8
.Lorbsense:
.long 0x00000000,0x0080ff00,.Lccwsense
.align 8
.Lccwread:
.long 0x02200000+IPL_BS,0x00000000
.Lccwsense:
.long 0x04200001,0x00000000
.Lwaitpsw:
.long 0x020a0000,0x80000000+.Lioint
.Lirb: .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
.Lcr6: .long 0xff000000
.align 8
.Lcrash:.long 0x000a0000,0x00000000
.Lldret:.long 0
.Lsnsret: .long 0
#endif /* CONFIG_IPL_TAPE */
#ifdef CONFIG_IPL_VM
#define IPL_BS 0x730
.org 0
.long 0x00080000,0x80000000+iplstart # The first 24 bytes are loaded
......@@ -256,7 +138,6 @@ __HEAD
.long 0x02600050,0x00000000
.endr
.long 0x02200050,0x00000000
#endif /* CONFIG_IPL_VM */
iplstart:
lh %r1,0xb8 # test if subchannel number
......@@ -325,7 +206,6 @@ iplstart:
clc 0(3,%r2),.L_eof
bz .Lagain2
#ifdef CONFIG_IPL_VM
#
# reset files in VM reader
#
......@@ -358,7 +238,6 @@ iplstart:
.long 0x00080000,0x80000000+.Lrdrint
.Lrdrwaitpsw:
.long 0x020a0000,0x80000000+.Lrdrint
#endif
#
# everything loaded, go for it
......@@ -376,8 +255,6 @@ iplstart:
.L_eof: .long 0xc5d6c600 /* C'EOF' */
.L_hdr: .long 0xc8c4d900 /* C'HDR' */
#endif /* CONFIG_IPL */
#
# SALIPL loader support. Based on a patch by Rob van der Heij.
# This entry point is called directly from the SALIPL loader and
......
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