[POWERPC] bootwrapper: Allow platforms to call library zImage_start

Some platforms might need to run some code before the zImage start, but
could otherwise use the bss clear and relocation code.   Export the
start address strongly as zImage_start_lib.

Signed-off-by: Milton Miller <miltonm@bga.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/powerpc/boot/crt0.S b/arch/powerpc/boot/crt0.S
index 3dc8d8f78499..25ad7453531a 100644
--- a/arch/powerpc/boot/crt0.S
+++ b/arch/powerpc/boot/crt0.S
@@ -19,6 +19,8 @@ _zimage_start_opd:
         .weak   _zimage_start
         .globl  _zimage_start
 _zimage_start:
+        .globl  _zimage_start_lib
+_zimage_start_lib:
         /* Work out the offset between the address we were linked at
            and the address where we're running. */
         bl      1f