1 files changed, 137 insertions, 0 deletions

diff --git a/arch/blackfin/include/asm/string.h b/arch/blackfin/include/asm/string.h
new file mode 100644
index 000000000000..321f4d96e4ae
--- /dev/null
+++ b/arch/blackfin/include/asm/string.h
@@ -0,0 +1,137 @@
+#ifndef _BLACKFIN_STRING_H_
+#define _BLACKFIN_STRING_H_
+
+#include <linux/types.h>
+
+#ifdef __KERNEL__               /* only set these up for kernel code */
+
+#define __HAVE_ARCH_STRCPY
+extern inline char *strcpy(char *dest, const char *src)
+{
+        char *xdest = dest;
+        char temp = 0;
+
+        __asm__ __volatile__ (
+                "1:"
+                "%2 = B [%1++] (Z);"
+                "B [%0++] = %2;"
+                "CC = %2;"
+                "if cc jump 1b (bp);"
+                : "+&a" (dest), "+&a" (src), "=&d" (temp)
+                :
+                : "memory", "CC");
+
+        return xdest;
+}
+
+#define __HAVE_ARCH_STRNCPY
+extern inline char *strncpy(char *dest, const char *src, size_t n)
+{
+        char *xdest = dest;
+        char temp = 0;
+
+        if (n == 0)
+                return xdest;
+
+        __asm__ __volatile__ (
+                "1:"
+                "%3 = B [%1++] (Z);"
+                "B [%0++] = %3;"
+                "CC = %3;"
+                "if ! cc jump 2f;"
+                "%2 += -1;"
+                "CC = %2 == 0;"
+                "if ! cc jump 1b (bp);"
+                "jump 4f;"
+                "2:"
+                /* if src is shorter than n, we need to null pad bytes now */
+                "%3 = 0;"
+                "3:"
+                "%2 += -1;"
+                "CC = %2 == 0;"
+                "if cc jump 4f;"
+                "B [%0++] = %3;"
+                "jump 3b;"
+                "4:"
+                : "+&a" (dest), "+&a" (src), "+&da" (n), "=&d" (temp)
+                :
+                : "memory", "CC");
+
+        return xdest;
+}
+
+#define __HAVE_ARCH_STRCMP
+extern inline int strcmp(const char *cs, const char *ct)
+{
+        /* need to use int's here so the char's in the assembly don't get
+         * sign extended incorrectly when we don't want them to be
+         */
+        int __res1, __res2;
+
+        __asm__ __volatile__ (
+                "1:"
+                "%2 = B[%0++] (Z);"      /* get *cs */
+                "%3 = B[%1++] (Z);"      /* get *ct */
+                "CC = %2 == %3;"         /* compare a byte */
+                "if ! cc jump 2f;"       /* not equal, break out */
+                "CC = %2;"               /* at end of cs? */
+                "if cc jump 1b (bp);"    /* no, keep going */
+                "jump.s 3f;"             /* strings are equal */
+                "2:"
+                "%2 = %2 - %3;"          /* *cs - *ct */
+                "3:"
+                : "+&a" (cs), "+&a" (ct), "=&d" (__res1), "=&d" (__res2)
+                :
+                : "memory", "CC");
+
+        return __res1;
+}
+
+#define __HAVE_ARCH_STRNCMP
+extern inline int strncmp(const char *cs, const char *ct, size_t count)
+{
+        /* need to use int's here so the char's in the assembly don't get
+         * sign extended incorrectly when we don't want them to be
+         */
+        int __res1, __res2;
+
+        if (!count)
+                return 0;
+
+        __asm__ __volatile__ (
+                "1:"
+                "%3 = B[%0++] (Z);"      /* get *cs */
+                "%4 = B[%1++] (Z);"      /* get *ct */
+                "CC = %3 == %4;"         /* compare a byte */
+                "if ! cc jump 3f;"       /* not equal, break out */
+                "CC = %3;"               /* at end of cs? */
+                "if ! cc jump 4f;"       /* yes, all done */
+                "%2 += -1;"              /* no, adjust count */
+                "CC = %2 == 0;"
+                "if ! cc jump 1b;"       /* more to do, keep going */
+                "2:"
+                "%3 = 0;"                /* strings are equal */
+                "jump.s 4f;"
+                "3:"
+                "%3 = %3 - %4;"          /* *cs - *ct */
+                "4:"
+                : "+&a" (cs), "+&a" (ct), "+&da" (count), "=&d" (__res1), "=&d" (__res2)
+                :
+                : "memory", "CC");
+
+        return __res1;
+}
+
+#define __HAVE_ARCH_MEMSET
+extern void *memset(void *s, int c, size_t count);
+#define __HAVE_ARCH_MEMCPY
+extern void *memcpy(void *d, const void *s, size_t count);
+#define __HAVE_ARCH_MEMCMP
+extern int memcmp(const void *, const void *, __kernel_size_t);
+#define __HAVE_ARCH_MEMCHR
+extern void *memchr(const void *s, int c, size_t n);
+#define __HAVE_ARCH_MEMMOVE
+extern void *memmove(void *dest, const void *src, size_t count);
+
+#endif /*__KERNEL__*/
+#endif                          /* _BLACKFIN_STRING_H_ */