freertos: release the generic version source code

freertos runs on the second core (small one) of the CPU

freertos/cvitek/common/include/cv1835/linux/uaccess.h

@@ -0,0 +1,63 @@
+/*
+ *  arch/arm/include/asm/uaccess.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef _ASMARM_UACCESS_H
+#define _ASMARM_UACCESS_H
+
+/*
+ * User space memory access functions
+ */
+//#include <linux/string.h>
+//#include <linux/thread_info.h>
+//#include <asm/errno.h>
+//#include <asm/memory.h>
+//#include <asm/domain.h>
+//#include <asm/unified.h>
+#include "linux/compiler.h"
+#include <string.h>
+
+#define __range_ok(addr, size) ((void)(addr), 0)
+#define access_ok(type, addr, size) (__range_ok(addr, size) == 0)
+
+#define __copy_from_user(to, from, n) (memcpy(to, (void __force *)from, n), 0)
+#define __copy_to_user(to, from, n) (memcpy((void __force *)to, from, n), 0)
+#define __clear_user(addr, n) (memset((void __force *)addr, 0, n), 0)
+
+static inline unsigned long __must_check copy_from_user(void *to,
+							const void __user *from,
+							unsigned long n)
+{
+	unsigned long res = n;
+
+	if (likely(access_ok(VERIFY_READ, from, n)))
+		res = __copy_from_user(to, from, n);
+	if (unlikely(res))
+		memset(to + (n - res), 0, res);
+	return res;
+}
+
+static inline unsigned long __must_check copy_to_user(void __user *to,
+						      const void *from,
+						      unsigned long n)
+{
+	if (access_ok(VERIFY_WRITE, to, n))
+		n = __copy_to_user(to, from, n);
+	return n;
+}
+
+#define __copy_to_user_inatomic __copy_to_user
+#define __copy_from_user_inatomic __copy_from_user
+
+static inline unsigned long __must_check clear_user(void __user *to,
+						    unsigned long n)
+{
+	if (access_ok(VERIFY_WRITE, to, n))
+		n = __clear_user(to, n);
+	return n;
+}
+
+#endif /* _ASMARM_UACCESS_H */