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[S390] initrd vs. bootmem bitmap.

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Move initrd if the bitmap of the bootmem allocator would overwrite it.
In addition this patch sets the default size and address of the initrd to 0.
Therefore all boot loaders must set the initrd size and address correctly.
This is especially relevant for ftp boot via HMC/SE, where this change
requires a special patch file entry in the .ins file which sets these two
values contained at address 0x10408 and 0x10410.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens
2006-09-20 15:58:41 +02:00
committed by Martin Schwidefsky
parent 4ba069b802
commit 65912a84c0
5 changed files with 48 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
arch/s390/kernel/head.S
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@@ -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