m68k/m68knommu: merge MMU and non-MMU string.h

The MMU and non-MMU string.h varients (string_no.h and string_mm.h)
and almost the same. Switch to using the string_mm.h one, merging
in the necessary ColdFire support.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

arch/m68k/include/asm/string.h

@@ -1,5 +1,133 @@
-#ifdef __uClinux__
-#include "string_no.h"
+#ifndef _M68K_STRING_H_
+#define _M68K_STRING_H_
+
+#include <linux/types.h>
+#include <linux/compiler.h>
+
+static inline size_t __kernel_strlen(const char *s)
+{
+	const char *sc;
+
+	for (sc = s; *sc++; )
+		;
+	return sc - s - 1;
+}
+
+static inline char *__kernel_strcpy(char *dest, const char *src)
+{
+	char *xdest = dest;
+
+	asm volatile ("\n"
+		"1:	move.b	(%1)+,(%0)+\n"
+		"	jne	1b"
+		: "+a" (dest), "+a" (src)
+		: : "memory");
+	return xdest;
+}
+
+#ifndef __IN_STRING_C
+
+#define __HAVE_ARCH_STRLEN
+#define strlen(s)	(__builtin_constant_p(s) ?	\
+			 __builtin_strlen(s) :		\
+			 __kernel_strlen(s))
+
+#define __HAVE_ARCH_STRNLEN
+static inline size_t strnlen(const char *s, size_t count)
+{
+	const char *sc = s;
+
+	asm volatile ("\n"
+		"1:     subq.l  #1,%1\n"
+		"       jcs     2f\n"
+		"       tst.b   (%0)+\n"
+		"       jne     1b\n"
+		"       subq.l  #1,%0\n"
+		"2:"
+		: "+a" (sc), "+d" (count));
+	return sc - s;
+}
+
+#define __HAVE_ARCH_STRCPY
+#if __GNUC__ >= 4
+#define strcpy(d, s)	(__builtin_constant_p(s) &&	\
+			 __builtin_strlen(s) <= 32 ?	\
+			 __builtin_strcpy(d, s) :	\
+			 __kernel_strcpy(d, s))
 #else
-#include "string_mm.h"
+#define strcpy(d, s)	__kernel_strcpy(d, s)
 #endif
+
+#define __HAVE_ARCH_STRNCPY
+static inline char *strncpy(char *dest, const char *src, size_t n)
+{
+	char *xdest = dest;
+
+	asm volatile ("\n"
+		"	jra	2f\n"
+		"1:	move.b	(%1),(%0)+\n"
+		"	jeq	2f\n"
+		"	addq.l	#1,%1\n"
+		"2:	subq.l	#1,%2\n"
+		"	jcc	1b\n"
+		: "+a" (dest), "+a" (src), "+d" (n)
+		: : "memory");
+	return xdest;
+}
+
+#define __HAVE_ARCH_STRCAT
+#define strcat(d, s)	({			\
+	char *__d = (d);			\
+	strcpy(__d + strlen(__d), (s));		\
+})
+
+#define __HAVE_ARCH_STRCHR
+static inline char *strchr(const char *s, int c)
+{
+	char sc, ch = c;
+
+	for (; (sc = *s++) != ch; ) {
+		if (!sc)
+			return NULL;
+	}
+	return (char *)s - 1;
+}
+
+#ifndef CONFIG_COLDFIRE
+#define __HAVE_ARCH_STRCMP
+static inline int strcmp(const char *cs, const char *ct)
+{
+	char res;
+
+	asm ("\n"
+		"1:	move.b	(%0)+,%2\n"	/* get *cs */
+		"	cmp.b	(%1)+,%2\n"	/* compare a byte */
+		"	jne	2f\n"		/* not equal, break out */
+		"	tst.b	%2\n"		/* at end of cs? */
+		"	jne	1b\n"		/* no, keep going */
+		"	jra	3f\n"		/* strings are equal */
+		"2:	sub.b	-(%1),%2\n"	/* *cs - *ct */
+		"3:"
+		: "+a" (cs), "+a" (ct), "=d" (res));
+	return res;
+}
+
+#define __HAVE_ARCH_MEMMOVE
+extern void *memmove(void *, const void *, __kernel_size_t);
+
+#define __HAVE_ARCH_MEMCMP
+extern int memcmp(const void *, const void *, __kernel_size_t);
+#define memcmp(d, s, n) __builtin_memcmp(d, s, n)
+#endif /* CONFIG_COLDFIRE */
+
+#define __HAVE_ARCH_MEMSET
+extern void *memset(void *, int, __kernel_size_t);
+#define memset(d, c, n) __builtin_memset(d, c, n)
+
+#define __HAVE_ARCH_MEMCPY
+extern void *memcpy(void *, const void *, __kernel_size_t);
+#define memcpy(d, s, n) __builtin_memcpy(d, s, n)
+
+#endif
+
+#endif /* _M68K_STRING_H_ */