1 files changed, 72 insertions, 0 deletions
diff --git a/payloads/libpayload/arch/mips/string.c b/payloads/libpayload/arch/mips/string.c
new file mode 100644
index 0000000000..0f0c7c3529
--- /dev/null
+++ b/payloads/libpayload/arch/mips/string.c
@@ -0,0 +1,72 @@
+ /*
+ * This file is part of the libpayload project.
+ *
+ * Copyright (C) 2014 Imagination Technologies
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdint.h>
+#include "string.h"
+
+/*
+ * Alternative string functions to the default ones are added
+ * because there is no guarantee that the provided source and
+ * destination addresses are properly aligned;
+ * The default string functions work with multiple of 4 bytes
+ * (sizeof(unsinged long)); MIPS will use LW/SW instructions
+ * for these operations and if the source and destination
+ * addresses are not aligned it will trigger an exception.
+ */
+
+void *memcpy(void *dest, const void *src, size_t n)
+{
+	u8 *ptr_d = dest;
+	const u8 *ptr_s = src;
+	size_t i;
+
+	for (i = 0; i < n; i++)
+		*ptr_d++ = *ptr_s++;
+
+	return dest;
+}
+
+void *memmove(void *dest, const void *src, size_t n)
+{
+	if ((src < dest) && (dest - src < n)) {
+		u8 *ptr_d = dest;
+		const u8 *ptr_s = src;
+		size_t i;
+
+		/* copy backwards */
+		for (i = n - 1; i >= 0; i--)
+			ptr_d[i] = ptr_s[i];
+
+		return dest;
+	}
+
+	/* copy forwards */
+	return memcpy(dest, src, n);
+}
+
+void *memset(void *s, int c, size_t n)
+{
+	u8 *ptr = s;
+	size_t i;
+
+	for (i = 0; i < n; i++)
+		*ptr++ = c;
+
+	return s;
+}