1 files changed, 84 insertions, 0 deletions
diff --git a/arch/parisc/lib/memcpy.c b/arch/parisc/lib/memcpy.c
new file mode 100644
index 000000000..865a7f796
--- /dev/null
+++ b/arch/parisc/lib/memcpy.c
@@ -0,0 +1,84 @@
+/*
+ *    Optimized memory copy routines.
+ *
+ *    Copyright (C) 2004 Randolph Chung <tausq@debian.org>
+ *    Copyright (C) 2013-2017 Helge Deller <deller@gmx.de>
+ *
+ *    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; either version 2, or (at your option)
+ *    any later version.
+ *
+ *    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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *    Portions derived from the GNU C Library
+ *    Copyright (C) 1991, 1997, 2003 Free Software Foundation, Inc.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/compiler.h>
+#include <linux/uaccess.h>
+
+#define get_user_space() (uaccess_kernel() ? 0 : mfsp(3))
+#define get_kernel_space() (0)
+
+/* Returns 0 for success, otherwise, returns number of bytes not transferred. */
+extern unsigned long pa_memcpy(void *dst, const void *src,
+				unsigned long len);
+
+unsigned long raw_copy_to_user(void __user *dst, const void *src,
+			       unsigned long len)
+{
+	mtsp(get_kernel_space(), 1);
+	mtsp(get_user_space(), 2);
+	return pa_memcpy((void __force *)dst, src, len);
+}
+EXPORT_SYMBOL(raw_copy_to_user);
+
+unsigned long raw_copy_from_user(void *dst, const void __user *src,
+			       unsigned long len)
+{
+	mtsp(get_user_space(), 1);
+	mtsp(get_kernel_space(), 2);
+	return pa_memcpy(dst, (void __force *)src, len);
+}
+EXPORT_SYMBOL(raw_copy_from_user);
+
+unsigned long raw_copy_in_user(void __user *dst, const void __user *src, unsigned long len)
+{
+	mtsp(get_user_space(), 1);
+	mtsp(get_user_space(), 2);
+	return pa_memcpy((void __force *)dst, (void __force *)src, len);
+}
+
+
+void * memcpy(void * dst,const void *src, size_t count)
+{
+	mtsp(get_kernel_space(), 1);
+	mtsp(get_kernel_space(), 2);
+	pa_memcpy(dst, src, count);
+	return dst;
+}
+
+EXPORT_SYMBOL(raw_copy_in_user);
+EXPORT_SYMBOL(memcpy);
+
+long probe_kernel_read(void *dst, const void *src, size_t size)
+{
+	unsigned long addr = (unsigned long)src;
+
+	if (addr < PAGE_SIZE)
+		return -EFAULT;
+
+	/* check for I/O space F_EXTEND(0xfff00000) access as well? */
+
+	return __probe_kernel_read(dst, src, size);
+}