Merging the mmu and non-mmu directories we ended up with duplicate
implementations of memcpy(). One is a little more optimized for the
68020 case, but that can easily be inserted into a single
implementation of memcpy(). Clean up the exporting of this symbol
too, otherwise we end up exporting it twice on a no-mmu build.
Signed-off-by: Greg Ungerer <gerg@xxxxxxxxxxx>
---
arch/m68k/kernel/m68k_ksyms_no.c | 6 --
arch/m68k/lib/Makefile | 5 +-
arch/m68k/lib/{string.c => memcpy.c} | 21 ++-----
arch/m68k/lib/string.c | 111 +++++++---------------------------
4 files changed, 30 insertions(+), 113 deletions(-)
rename arch/m68k/lib/{string.c => memcpy.c} (84%)
rewrite arch/m68k/lib/string.c (71%)
diff --git a/arch/m68k/kernel/m68k_ksyms_no.c b/arch/m68k/kernel/m68k_ksyms_no.c
index 346bce6..10af0af 100644
--- a/arch/m68k/kernel/m68k_ksyms_no.c
+++ b/arch/m68k/kernel/m68k_ksyms_no.c
@@ -31,12 +31,6 @@ EXPORT_SYMBOL(kernel_thread);
/* Networking helper routines. */
EXPORT_SYMBOL(csum_partial_copy_nocheck);
-/* The following are special because they're not called
- explicitly (the C compiler generates them). Fortunately,
- their interface isn't gonna change any time soon now, so
- it's OK to leave it out of version control. */
-EXPORT_SYMBOL(memcpy);
-
/*
* libgcc functions - functions that are used internally by the
* compiler... (prototypes are not correct though, but that
diff --git a/arch/m68k/lib/Makefile b/arch/m68k/lib/Makefile
index ac275d5..2438d02 100644
--- a/arch/m68k/lib/Makefile
+++ b/arch/m68k/lib/Makefile
@@ -4,12 +4,11 @@
#
lib-y := ashldi3.o ashrdi3.o lshrdi3.o muldi3.o \
- memset.o memmove.o checksum.o
+ memcpy.o memset.o memmove.o checksum.o
ifdef CONFIG_MMU
lib-y += string.o uaccess.o
else
-lib-y += mulsi3.o divsi3.o udivsi3.o modsi3.o umodsi3.o \
- memcpy.o delay.o
+lib-y += mulsi3.o divsi3.o udivsi3.o modsi3.o umodsi3.o delay.o
endif
diff --git a/arch/m68k/lib/string.c b/arch/m68k/lib/memcpy.c
similarity index 84%
rename from arch/m68k/lib/string.c
rename to arch/m68k/lib/memcpy.c
index 6d24612..2592171 100644
--- a/arch/m68k/lib/string.c
+++ b/arch/m68k/lib/memcpy.c
@@ -4,23 +4,9 @@
* for more details.
*/
-#define __IN_STRING_C
-
#include <linux/module.h>
#include <linux/string.h>
-char *strcpy(char *dest, const char *src)
-{
- return __kernel_strcpy(dest, src);
-}
-EXPORT_SYMBOL(strcpy);
-
-char *strcat(char *dest, const char *src)
-{
- return __kernel_strcpy(dest + __kernel_strlen(dest), src);
-}
-EXPORT_SYMBOL(strcat);
-
void *memcpy(void *to, const void *from, size_t n)
{
void *xto = to;
@@ -48,7 +34,8 @@ void *memcpy(void *to, const void *from, size_t n)
if (temp) {
long *lto = to;
const long *lfrom = from;
-
+#if defined(__mc68020__) || defined(__mc68030__) || \
+ defined(__mc68040__) || defined(__mc68060__)
asm volatile (
" movel %2,%3\n"
" andw #7,%3\n"
@@ -69,6 +56,10 @@ void *memcpy(void *to, const void *from, size_t n)
" jpl 4b"
: "=a" (lfrom), "=a" (lto), "=d" (temp), "=&d" (temp1)
: "0" (lfrom), "1" (lto), "2" (temp));
+#else
+ for (; temp; temp--)
+ *lto++ = *lfrom++;
+#endif
to = lto;
from = lfrom;
}
diff --git a/arch/m68k/lib/string.c b/arch/m68k/lib/string.c
dissimilarity index 71%
index 6d24612..b9a57ab 100644
--- a/arch/m68k/lib/string.c
+++ b/arch/m68k/lib/string.c
@@ -1,89 +1,22 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file COPYING in the main directory of this archive
- * for more details.
- */
-
-#define __IN_STRING_C
-
-#include <linux/module.h>
-#include <linux/string.h>
-
-char *strcpy(char *dest, const char *src)
-{
- return __kernel_strcpy(dest, src);
-}
-EXPORT_SYMBOL(strcpy);
-
-char *strcat(char *dest, const char *src)
-{
- return __kernel_strcpy(dest + __kernel_strlen(dest), src);
-}
-EXPORT_SYMBOL(strcat);
-
-void *memcpy(void *to, const void *from, size_t n)
-{
- void *xto = to;
- size_t temp, temp1;
-
- if (!n)
- return xto;
- if ((long)to & 1) {
- char *cto = to;
- const char *cfrom = from;
- *cto++ = *cfrom++;
- to = cto;
- from = cfrom;
- n--;
- }
- if (n > 2 && (long)to & 2) {
- short *sto = to;
- const short *sfrom = from;
- *sto++ = *sfrom++;
- to = sto;
- from = sfrom;
- n -= 2;
- }
- temp = n >> 2;
- if (temp) {
- long *lto = to;
- const long *lfrom = from;
-
- asm volatile (
- " movel %2,%3\n"
- " andw #7,%3\n"
- " lsrl #3,%2\n"
- " negw %3\n"
- " jmp %%pc@(1f,%3:w:2)\n"
- "4: movel %0@+,%1@+\n"
- " movel %0@+,%1@+\n"
- " movel %0@+,%1@+\n"
- " movel %0@+,%1@+\n"
- " movel %0@+,%1@+\n"
- " movel %0@+,%1@+\n"
- " movel %0@+,%1@+\n"
- " movel %0@+,%1@+\n"
- "1: dbra %2,4b\n"
- " clrw %2\n"
- " subql #1,%2\n"
- " jpl 4b"
- : "=a" (lfrom), "=a" (lto), "=d" (temp), "=&d" (temp1)
- : "0" (lfrom), "1" (lto), "2" (temp));
- to = lto;
- from = lfrom;
- }
- if (n & 2) {
- short *sto = to;
- const short *sfrom = from;
- *sto++ = *sfrom++;
- to = sto;
- from = sfrom;
- }
- if (n & 1) {
- char *cto = to;
- const char *cfrom = from;
- *cto = *cfrom;
- }
- return xto;
-}
-EXPORT_SYMBOL(memcpy);
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+#define __IN_STRING_C
+
+#include <linux/module.h>
+#include <linux/string.h>
+
+char *strcpy(char *dest, const char *src)
+{
+ return __kernel_strcpy(dest, src);
+}
+EXPORT_SYMBOL(strcpy);
+
+char *strcat(char *dest, const char *src)
+{
+ return __kernel_strcpy(dest + __kernel_strlen(dest), src);
+}
+EXPORT_SYMBOL(strcat);
--
1.7.0.4
--
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