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authorTony Breeds <tony@bakeyournoodle.com>2008-06-24 14:20:29 +1000
committerPaul Mackerras <paulus@samba.org>2008-07-01 11:28:32 +1000
commit9b09c6d909dfd8de96b99b9b9c808b94b0a71614 (patch)
tree0796f29964a133130ed39584000b2108497f3d65 /arch/powerpc/boot/wrapper
parentc230328def963373ec474056f372e1918692c3c8 (diff)
powerpc: Change the default link address for pSeries zImage kernels
Currently we set the start of the .text section to be 4Mb for pSeries. In situations where the zImage is > 8Mb we'll fail to boot (due to overlapping with OF). Move .text in a zImage from 4MB to 64MB (well past OF). We still will not be able to load large zImage unless we also move OF, to that end, add a note to the zImage ELF to move OF to 32Mb. If this is the very first kernel booted then we'll need to move OF manually by setting real-base. Signed-off-by: Tony Breeds <tony@bakeyournoodle.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/boot/wrapper')
-rwxr-xr-xarch/powerpc/boot/wrapper14
1 files changed, 12 insertions, 2 deletions
diff --git a/arch/powerpc/boot/wrapper b/arch/powerpc/boot/wrapper
index cb87a015be7..df2358e9f1c 100755
--- a/arch/powerpc/boot/wrapper
+++ b/arch/powerpc/boot/wrapper
@@ -138,14 +138,20 @@ objflags=-S
tmp=$tmpdir/zImage.$$.o
ksection=.kernel:vmlinux.strip
isection=.kernel:initrd
+link_address='0x400000'
case "$platform" in
-pmac|pseries|chrp)
+pseries)
+ platformo=$object/of.o
+ link_address='0x4000000'
+ ;;
+pmac|chrp)
platformo=$object/of.o
;;
coff)
platformo=$object/of.o
lds=$object/zImage.coff.lds
+ link_address='0x500000'
;;
miboot|uboot)
# miboot and U-boot want just the bare bits, not an ELF binary
@@ -190,6 +196,7 @@ ps3)
objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
ksection=.kernel:vmlinux.bin
isection=.kernel:initrd
+ link_address=''
;;
ep88xc|ep405|ep8248e)
platformo="$object/fixed-head.o $object/$platform.o"
@@ -272,7 +279,10 @@ if [ -n "$dtb" ]; then
fi
if [ "$platform" != "miboot" ]; then
- ${CROSS}ld -m elf32ppc -T $lds -o "$ofile" \
+ if [ -n "$link_address" ] ; then
+ text_start="-Ttext $link_address --defsym _start=$link_address"
+ fi
+ ${CROSS}ld -m elf32ppc -T $lds $text_start -o "$ofile" \
$platformo $tmp $object/wrapper.a
rm $tmp
fi