1 files changed, 137 insertions, 0 deletions

diff --git a/include/asm-s390/string.h b/include/asm-s390/string.h
new file mode 100644
index 000000000000..23a4c390489f
--- /dev/null
+++ b/include/asm-s390/string.h
@@ -0,0 +1,137 @@
+/*
+ *  include/asm-s390/string.h
+ *
+ *  S390 version
+ *    Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
+ */
+
+#ifndef _S390_STRING_H_
+#define _S390_STRING_H_
+
+#ifdef __KERNEL__
+
+#ifndef _LINUX_TYPES_H
+#include <linux/types.h>
+#endif
+
+#define __HAVE_ARCH_MEMCHR      /* inline & arch function */
+#define __HAVE_ARCH_MEMCMP      /* arch function */
+#define __HAVE_ARCH_MEMCPY      /* gcc builtin & arch function */
+#define __HAVE_ARCH_MEMSCAN     /* inline & arch function */
+#define __HAVE_ARCH_MEMSET      /* gcc builtin & arch function */
+#define __HAVE_ARCH_STRCAT      /* inline & arch function */
+#define __HAVE_ARCH_STRCMP      /* arch function */
+#define __HAVE_ARCH_STRCPY      /* inline & arch function */
+#define __HAVE_ARCH_STRLCAT     /* arch function */
+#define __HAVE_ARCH_STRLCPY     /* arch function */
+#define __HAVE_ARCH_STRLEN      /* inline & arch function */
+#define __HAVE_ARCH_STRNCAT     /* arch function */
+#define __HAVE_ARCH_STRNCPY     /* arch function */
+#define __HAVE_ARCH_STRNLEN     /* inline & arch function */
+#define __HAVE_ARCH_STRRCHR     /* arch function */
+#define __HAVE_ARCH_STRSTR      /* arch function */
+
+/* Prototypes for non-inlined arch strings functions. */
+extern int memcmp(const void *, const void *, size_t);
+extern void *memcpy(void *, const void *, size_t);
+extern void *memset(void *, int, size_t);
+extern int strcmp(const char *,const char *);
+extern size_t strlcat(char *, const char *, size_t);
+extern size_t strlcpy(char *, const char *, size_t);
+extern char *strncat(char *, const char *, size_t);
+extern char *strncpy(char *, const char *, size_t);
+extern char *strrchr(const char *, int);
+extern char *strstr(const char *, const char *);
+
+#undef __HAVE_ARCH_MEMMOVE
+#undef __HAVE_ARCH_STRCHR
+#undef __HAVE_ARCH_STRNCHR
+#undef __HAVE_ARCH_STRNCMP
+#undef __HAVE_ARCH_STRNICMP
+#undef __HAVE_ARCH_STRPBRK
+#undef __HAVE_ARCH_STRSEP
+#undef __HAVE_ARCH_STRSPN
+
+#if !defined(IN_ARCH_STRING_C)
+
+static inline void *memchr(const void * s, int c, size_t n)
+{
+        register int r0 asm("0") = (char) c;
+        const void *ret = s + n;
+
+        asm volatile ("0: srst  %0,%1\n"
+                      "   jo    0b\n"
+                      "   jl    1f\n"
+                      "   la    %0,0\n"
+                      "1:"
+                      : "+a" (ret), "+&a" (s) : "d" (r0) : "cc" );
+        return (void *) ret;
+}
+
+static inline void *memscan(void *s, int c, size_t n)
+{
+        register int r0 asm("0") = (char) c;
+        const void *ret = s + n;
+
+        asm volatile ("0: srst  %0,%1\n"
+                      "   jo    0b\n"
+                      : "+a" (ret), "+&a" (s) : "d" (r0) : "cc" );
+        return (void *) ret;
+}
+
+static inline char *strcat(char *dst, const char *src)
+{
+        register int r0 asm("0") = 0;
+        unsigned long dummy;
+        char *ret = dst;
+
+        asm volatile ("0: srst  %0,%1\n"
+                      "   jo    0b\n"
+                      "1: mvst  %0,%2\n"
+                      "   jo    1b"
+                      : "=&a" (dummy), "+a" (dst), "+a" (src)
+                      : "d" (r0), "0" (0) : "cc", "memory" );
+        return ret;
+}
+
+static inline char *strcpy(char *dst, const char *src)
+{
+        register int r0 asm("0") = 0;
+        char *ret = dst;
+
+        asm volatile ("0: mvst  %0,%1\n"
+                      "   jo    0b"
+                      : "+&a" (dst), "+&a" (src) : "d" (r0)
+                      : "cc", "memory" );
+        return ret;
+}
+
+static inline size_t strlen(const char *s)
+{
+        register unsigned long r0 asm("0") = 0;
+        const char *tmp = s;
+
+        asm volatile ("0: srst  %0,%1\n"
+                      "   jo    0b"
+                      : "+d" (r0), "+a" (tmp) :  : "cc" );
+        return r0 - (unsigned long) s;
+}
+
+static inline size_t strnlen(const char * s, size_t n)
+{
+        register int r0 asm("0") = 0;
+        const char *tmp = s;
+        const char *end = s + n;
+
+        asm volatile ("0: srst  %0,%1\n"
+                      "   jo    0b"
+                      : "+a" (end), "+a" (tmp) : "d" (r0)  : "cc" );
+        return end - s;
+}
+
+#endif /* !IN_ARCH_STRING_C */
+
+#endif /* __KERNEL__ */
+
+#endif /* __S390_STRING_H_ */