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authorDavid Gibson <david@gibson.dropbear.id.au>2007-10-12 12:36:20 +1000
committerPaul Mackerras <paulus@samba.org>2007-10-12 14:13:44 +1000
commit9b4b8feb962f4b3e74768b7205f1f8f6cce87238 (patch)
tree7d7c95d9024d0d47ebb5f4299efc8d7ef00fa3ec
parentd0c3d534a4388a465101b634a95f2ec586415254 (diff)
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[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>
-rw-r--r--arch/powerpc/boot/string.S13
-rw-r--r--arch/powerpc/boot/string.h1
2 files changed, 14 insertions, 0 deletions
diff --git a/arch/powerpc/boot/string.S b/arch/powerpc/boot/string.S
index 2627558bcb7..643e4cb2f11 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
diff --git a/arch/powerpc/boot/string.h b/arch/powerpc/boot/string.h
index 4650030d104..50091cc0eed 100644
--- a/arch/powerpc/boot/string.h
+++ b/arch/powerpc/boot/string.h
@@ -14,6 +14,7 @@ extern size_t strnlen(const char *s, size_t count);
extern void *memset(void *s, int c, size_t n);
extern void *memmove(void *dest, const void *src, unsigned long n);
extern void *memcpy(void *dest, const void *src, unsigned long n);
+extern void *memchr(const void *s, int c, size_t n);
extern int memcmp(const void *s1, const void *s2, size_t n);
#endif /* _PPC_BOOT_STRING_H_ */