X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=blobdiff_plain;f=arch%2Fmicroblaze%2Flib%2Fmemmove.c;h=123e3616f2dd44213b75a5471e95c810d26488ea;hp=0929198c5e686b737a5e1bbe232652760328a403;hb=6303710d7aa62bfb154cd13ab5ab12cfa8baaf91;hpb=d5e5deddf67389eabc3d9b13004c108120d397e1

diff --git a/arch/microblaze/lib/memmove.c b/arch/microblaze/lib/memmove.c
index 0929198c5e68..123e3616f2dd 100644
--- a/arch/microblaze/lib/memmove.c
+++ b/arch/microblaze/lib/memmove.c
@@ -31,16 +31,12 @@
 #include <linux/string.h>
 
 #ifdef __HAVE_ARCH_MEMMOVE
+#ifndef CONFIG_OPT_LIB_FUNCTION
 void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
 {
 	const char *src = v_src;
 	char *dst = v_dst;
 
-#ifdef CONFIG_OPT_LIB_FUNCTION
-	const uint32_t *i_src;
-	uint32_t *i_dst;
-#endif
-
 	if (!c)
 		return v_dst;
 
@@ -48,7 +44,6 @@ void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
 	if (v_dst <= v_src)
 		return memcpy(v_dst, v_src, c);
 
-#ifndef CONFIG_OPT_LIB_FUNCTION
 	/* copy backwards, from end to beginning */
 	src += c;
 	dst += c;
@@ -58,7 +53,22 @@ void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
 		*--dst = *--src;
 
 	return v_dst;
-#else
+}
+#else /* CONFIG_OPT_LIB_FUNCTION */
+void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
+{
+	const char *src = v_src;
+	char *dst = v_dst;
+	const uint32_t *i_src;
+	uint32_t *i_dst;
+
+	if (!c)
+		return v_dst;
+
+	/* Use memcpy when source is higher than dest */
+	if (v_dst <= v_src)
+		return memcpy(v_dst, v_src, c);
+
 	/* The following code tries to optimize the copy by using unsigned
 	 * alignment. This will work fine if both source and destination are
 	 * aligned on the same boundary. However, if they are aligned on
@@ -104,7 +114,7 @@ void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
 		case 0x1:	/* Unaligned - Off by 1 */
 			/* Word align the source */
 			i_src = (const void *) (((unsigned)src + 4) & ~3);
-
+#ifndef __MICROBLAZEEL__
 			/* Load the holding buffer */
 			buf_hold = *--i_src >> 24;
 
@@ -113,7 +123,16 @@ void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
 				*--i_dst = buf_hold << 8 | value;
 				buf_hold = value >> 24;
 			}
+#else
+			/* Load the holding buffer */
+			buf_hold = (*--i_src & 0xFF) << 24;
 
+			for (; c >= 4; c -= 4) {
+				value = *--i_src;
+				*--i_dst = buf_hold | ((value & 0xFFFFFF00)>>8);
+				buf_hold = (value  & 0xFF) << 24;
+			}
+#endif
 			/* Realign the source */
 			src = (const void *)i_src;
 			src += 1;
@@ -121,7 +140,7 @@ void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
 		case 0x2:	/* Unaligned - Off by 2 */
 			/* Word align the source */
 			i_src = (const void *) (((unsigned)src + 4) & ~3);
-
+#ifndef __MICROBLAZEEL__
 			/* Load the holding buffer */
 			buf_hold = *--i_src >> 16;
 
@@ -130,7 +149,16 @@ void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
 				*--i_dst = buf_hold << 16 | value;
 				buf_hold = value >> 16;
 			}
+#else
+			/* Load the holding buffer */
+			buf_hold = (*--i_src & 0xFFFF) << 16;
 
+			for (; c >= 4; c -= 4) {
+				value = *--i_src;
+				*--i_dst = buf_hold | ((value & 0xFFFF0000)>>16);
+				buf_hold = (value & 0xFFFF) << 16;
+			}
+#endif
 			/* Realign the source */
 			src = (const void *)i_src;
 			src += 2;
@@ -138,7 +166,7 @@ void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
 		case 0x3:	/* Unaligned - Off by 3 */
 			/* Word align the source */
 			i_src = (const void *) (((unsigned)src + 4) & ~3);
-
+#ifndef __MICROBLAZEEL__
 			/* Load the holding buffer */
 			buf_hold = *--i_src >> 8;
 
@@ -147,7 +175,16 @@ void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
 				*--i_dst = buf_hold << 24 | value;
 				buf_hold = value >> 8;
 			}
+#else
+			/* Load the holding buffer */
+			buf_hold = (*--i_src & 0xFFFFFF) << 8;
 
+			for (; c >= 4; c -= 4) {
+				value = *--i_src;
+				*--i_dst = buf_hold | ((value & 0xFF000000)>> 24);
+				buf_hold = (value & 0xFFFFFF) << 8;;
+			}
+#endif
 			/* Realign the source */
 			src = (const void *)i_src;
 			src += 3;
@@ -169,7 +206,7 @@ void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
 		*--dst = *--src;
 	}
 	return v_dst;
-#endif
 }
+#endif /* CONFIG_OPT_LIB_FUNCTION */
 EXPORT_SYMBOL(memmove);
 #endif /* __HAVE_ARCH_MEMMOVE */