[POWERPC] Add memchr() to the bootwrapper

This adds a memchr() implementation to the bootwrapper, which will
be needed when libfdt is merged in.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/arch/powerpc/boot/string.S b/arch/powerpc/boot/string.S
index 2627558bcb71..643e4cb2f11d 100644
--- a/arch/powerpc/boot/string.S
+++ b/arch/powerpc/boot/string.S
@@ -219,6 +219,19 @@ backwards_memcpy:
         mtctr   r7
         b       1b
 
+        .globl  memchr
+memchr:
+        cmpwi   0,r5,0
+        blelr
+        mtctr   r5
+        addi    r3,r3,-1
+1:      lbzu    r0,1(r3)
+        cmpw    r0,r4
+        beqlr
+        bdnz    1b
+        li      r3,0
+        blr
+
         .globl  memcmp
 memcmp:
         cmpwi   0,r5,0